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gecko-dev
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gecko-dev/dom/base/nsContentUtils.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* A namespace class for static layout utilities. */
#include "nsContentUtils.h"
#include <algorithm>
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <functional>
#include <new>
#include <utility>
#include "BrowserChild.h"
#include "DecoderTraits.h"
#include "ErrorList.h"
#include "ImageOps.h"
#include "InProcessBrowserChildMessageManager.h"
#include "Layers.h"
#include "MainThreadUtils.h"
#include "PLDHashTable.h"
#include "ReferrerInfo.h"
#include "ThirdPartyUtil.h"
#include "Units.h"
#include "chrome/common/ipc_message.h"
#include "gfxDrawable.h"
#include "harfbuzz/hb.h"
#include "imgICache.h"
#include "imgIContainer.h"
#include "imgILoader.h"
#include "imgIRequest.h"
#include "imgLoader.h"
#include "js/Array.h"
#include "js/ArrayBuffer.h"
#include "js/BuildId.h"
#include "js/GCAPI.h"
#include "js/Id.h"
#include "js/JSON.h"
#include "js/PropertyAndElement.h" // JS_DefineElement, JS_GetProperty
#include "js/PropertyDescriptor.h"
#include "js/Realm.h"
#include "js/RegExp.h"
#include "js/RegExpFlags.h"
#include "js/RootingAPI.h"
#include "js/TypeDecls.h"
#include "js/Value.h"
#include "js/Wrapper.h"
#include "jsapi.h"
#include "jsfriendapi.h"
#include "mozAutoDocUpdate.h"
#include "mozIDOMWindow.h"
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/ArrayIterator.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/AtomArray.h"
#include "mozilla/Atomics.h"
#include "mozilla/Attributes.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/AutoTimelineMarker.h"
#include "mozilla/BackgroundHangMonitor.h"
#include "mozilla/Base64.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/BloomFilter.h"
#include "mozilla/CORSMode.h"
#include "mozilla/CallState.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/Components.h"
#include "mozilla/CycleCollectedJSContext.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/EventQueue.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/FlushType.h"
#include "mozilla/HTMLEditor.h"
#include "mozilla/HangAnnotations.h"
#include "mozilla/IMEStateManager.h"
#include "mozilla/InputEventOptions.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/Latin1.h"
#include "mozilla/Likely.h"
#include "mozilla/LoadInfo.h"
#include "mozilla/Logging.h"
#include "mozilla/MacroForEach.h"
#include "mozilla/ManualNAC.h"
#include "mozilla/Maybe.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/NotNull.h"
#include "mozilla/NullPrincipal.h"
#include "mozilla/OriginAttributes.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/ProfilerRunnable.h"
#include "mozilla/RangeBoundary.h"
#include "mozilla/RefPtr.h"
#include "mozilla/Result.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/ScrollbarPreferences.h"
#include "mozilla/Span.h"
#include "mozilla/StaticAnalysisFunctions.h"
#include "mozilla/StaticPrefs_dom.h"
#ifdef FUZZING
# include "mozilla/StaticPrefs_fuzzing.h"
#endif
#include "mozilla/StaticPrefs_nglayout.h"
#include "mozilla/StaticPrefs_privacy.h"
#include "mozilla/StaticPrefs_test.h"
#include "mozilla/StaticPrefs_ui.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/TaskCategory.h"
#include "mozilla/TextControlState.h"
#include "mozilla/TextEditor.h"
#include "mozilla/TextEvents.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/Unused.h"
#include "mozilla/Variant.h"
#include "mozilla/ViewportUtils.h"
#include "mozilla/dom/AncestorIterator.h"
#include "mozilla/dom/AutoEntryScript.h"
#include "mozilla/dom/AutocompleteInfoBinding.h"
#include "mozilla/dom/AutoSuppressEventHandlingAndSuspend.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/BlobImpl.h"
#include "mozilla/dom/BlobURLProtocolHandler.h"
#include "mozilla/dom/BorrowedAttrInfo.h"
#include "mozilla/dom/BrowserBridgeParent.h"
#include "mozilla/dom/BrowserParent.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/BrowsingContextGroup.h"
#include "mozilla/dom/CallbackFunction.h"
#include "mozilla/dom/CallbackObject.h"
#include "mozilla/dom/ChromeMessageBroadcaster.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentFrameMessageManager.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/CustomElementRegistry.h"
#include "mozilla/dom/CustomElementRegistryBinding.h"
#include "mozilla/dom/DOMArena.h"
#include "mozilla/dom/DOMException.h"
#include "mozilla/dom/DOMExceptionBinding.h"
#include "mozilla/dom/DOMSecurityMonitor.h"
#include "mozilla/dom/DOMTypes.h"
#include "mozilla/dom/DataTransfer.h"
#include "mozilla/dom/DocGroup.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentFragment.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ElementBinding.h"
#include "mozilla/dom/ElementInlines.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/EventTarget.h"
#include "mozilla/dom/FileBlobImpl.h"
#include "mozilla/dom/FileSystemSecurity.h"
#include "mozilla/dom/FilteredNodeIterator.h"
#include "mozilla/dom/FontTableURIProtocolHandler.h"
#include "mozilla/dom/FragmentOrElement.h"
#include "mozilla/dom/FromParser.h"
#include "mozilla/dom/HTMLFormElement.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/HTMLTextAreaElement.h"
#include "mozilla/dom/IPCBlob.h"
#include "mozilla/dom/IPCBlobUtils.h"
#include "mozilla/dom/MessageBroadcaster.h"
#include "mozilla/dom/MessageListenerManager.h"
#include "mozilla/dom/MessagePort.h"
#include "mozilla/dom/MouseEventBinding.h"
#include "mozilla/dom/NameSpaceConstants.h"
#include "mozilla/dom/NodeBinding.h"
#include "mozilla/dom/NodeInfo.h"
#include "mozilla/dom/PBrowser.h"
#include "mozilla/dom/PContentChild.h"
#include "mozilla/dom/PrototypeList.h"
#include "mozilla/dom/ReferrerPolicyBinding.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/dom/ShadowRoot.h"
#include "mozilla/dom/Text.h"
#include "mozilla/dom/UserActivation.h"
#include "mozilla/dom/WindowContext.h"
#include "mozilla/dom/WorkerCommon.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/XULCommandEvent.h"
#include "mozilla/fallible.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/BaseMargin.h"
#include "mozilla/gfx/BasePoint.h"
#include "mozilla/gfx/BaseSize.h"
#include "mozilla/gfx/DataSurfaceHelpers.h"
#include "mozilla/gfx/Point.h"
#include "mozilla/gfx/Rect.h"
#include "mozilla/gfx/Types.h"
#include "mozilla/ipc/ProtocolUtils.h"
#include "mozilla/ipc/SharedMemory.h"
#include "mozilla/ipc/Shmem.h"
#include "mozilla/net/UrlClassifierCommon.h"
#include "mozilla/widget/IMEData.h"
#include "nsAboutProtocolUtils.h"
#include "nsAlgorithm.h"
#include "nsArrayUtils.h"
#include "nsAtom.h"
#include "nsAttrName.h"
#include "nsAttrValue.h"
#include "nsAttrValueInlines.h"
#include "nsBaseHashtable.h"
#include "nsCCUncollectableMarker.h"
#include "nsCOMPtr.h"
#include "nsCRT.h"
#include "nsCRTGlue.h"
#include "nsCanvasFrame.h"
#include "nsCaseTreatment.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsCharTraits.h"
#include "nsCompatibility.h"
#include "nsComponentManagerUtils.h"
#include "nsContainerFrame.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentDLF.h"
#include "nsContentList.h"
#include "nsContentListDeclarations.h"
#include "nsContentPolicyUtils.h"
#include "nsCoord.h"
#include "nsCycleCollectionNoteChild.h"
#include "nsDOMMutationObserver.h"
#include "nsDOMString.h"
#include "nsTHashMap.h"
#include "nsDebug.h"
#include "nsDocShell.h"
#include "nsDocShellCID.h"
#include "nsError.h"
#include "nsFocusManager.h"
#include "nsFrameList.h"
#include "nsFrameLoader.h"
#include "nsFrameLoaderOwner.h"
#include "nsGenericHTMLElement.h"
#include "nsGkAtoms.h"
#include "nsGlobalWindowInner.h"
#include "nsGlobalWindowOuter.h"
#include "nsHTMLDocument.h"
#include "nsHTMLTags.h"
#include "nsHashKeys.h"
#include "nsHtml5StringParser.h"
#include "nsIAboutModule.h"
#include "nsIAnonymousContentCreator.h"
#include "nsIArray.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "nsIBidiKeyboard.h"
#include "nsIBrowser.h"
#include "nsICacheInfoChannel.h"
#include "nsICategoryManager.h"
#include "nsIChannel.h"
#include "nsIChannelEventSink.h"
#include "nsIClassifiedChannel.h"
#include "nsIConsoleService.h"
#include "nsIContent.h"
#include "nsIContentInlines.h"
#include "nsIContentPolicy.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIContentSink.h"
#include "nsIContentViewer.h"
#include "nsID.h"
#include "nsIDOMWindowUtils.h"
#include "nsIDocShell.h"
#include "nsIDocShellTreeItem.h"
#include "nsIDocumentEncoder.h"
#include "nsIDocumentLoaderFactory.h"
#include "nsIDragService.h"
#include "nsIDragSession.h"
#include "nsIFile.h"
#include "nsIFocusManager.h"
#include "nsIFormControl.h"
#include "nsIFragmentContentSink.h"
#include "nsIFrame.h"
#include "nsIGlobalObject.h"
#include "nsIHttpChannel.h"
#include "nsIHttpChannelInternal.h"
#include "nsIIOService.h"
#include "nsIImageLoadingContent.h"
#include "nsIInputStream.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsILoadContext.h"
#include "nsILoadGroup.h"
#include "nsILoadInfo.h"
#include "nsIMIMEService.h"
#include "nsIMemoryReporter.h"
#include "nsINetUtil.h"
#include "nsINode.h"
#include "nsIObjectLoadingContent.h"
#include "nsIObserver.h"
#include "nsIObserverService.h"
#include "nsIParser.h"
#include "nsIParserUtils.h"
#include "nsIPermissionManager.h"
#include "nsIPluginTag.h"
#include "nsIPrincipal.h"
#include "nsIProperties.h"
#include "nsIProtocolHandler.h"
#include "nsIRequest.h"
#include "nsIRunnable.h"
#include "nsIScreen.h"
#include "nsIScriptError.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptObjectPrincipal.h"
#include "nsIScriptSecurityManager.h"
#include "nsISerialEventTarget.h"
#include "nsIStreamConverter.h"
#include "nsIStreamConverterService.h"
#include "nsIStringBundle.h"
#include "nsISupports.h"
#include "nsISupportsPrimitives.h"
#include "nsISupportsUtils.h"
#include "nsITransferable.h"
#include "nsIURI.h"
#include "nsIURIMutator.h"
#if defined(MOZ_THUNDERBIRD) || defined(MOZ_SUITE)
# include "nsIURIWithSpecialOrigin.h"
#endif
#include "nsIUUIDGenerator.h"
#include "nsIUserIdleService.h"
#include "nsIWeakReferenceUtils.h"
#include "nsIWebNavigation.h"
#include "nsIWebNavigationInfo.h"
#include "nsIWidget.h"
#include "nsIWindowMediator.h"
#include "nsIXPConnect.h"
#include "nsJSPrincipals.h"
#include "nsJSUtils.h"
#include "nsLayoutUtils.h"
#include "nsLiteralString.h"
#include "nsMappedAttributes.h"
#include "nsMargin.h"
#include "nsMimeTypes.h"
#include "nsNameSpaceManager.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsNodeInfoManager.h"
#include "nsPIDOMWindow.h"
#include "nsPIDOMWindowInlines.h"
#include "nsParserCIID.h"
#include "nsParserConstants.h"
#include "nsPluginHost.h"
#include "nsPoint.h"
#include "nsPointerHashKeys.h"
#include "nsPresContext.h"
#include "nsQueryFrame.h"
#include "nsQueryObject.h"
#include "nsRFPService.h"
#include "nsRange.h"
#include "nsRefPtrHashtable.h"
#include "nsSandboxFlags.h"
#include "nsScriptSecurityManager.h"
#include "nsServiceManagerUtils.h"
#include "nsStreamUtils.h"
#include "nsString.h"
#include "nsStringBuffer.h"
#include "nsStringFlags.h"
#include "nsStringFwd.h"
#include "nsStringIterator.h"
#include "nsTArray.h"
#include "nsTLiteralString.h"
#include "nsTPromiseFlatString.h"
#include "nsTStringRepr.h"
#include "nsTextFragment.h"
#include "nsTextNode.h"
#include "nsThreadManager.h"
#include "nsThreadUtils.h"
#include "nsTreeSanitizer.h"
#include "nsUGenCategory.h"
#include "nsURLHelper.h"
#include "nsUnicodeProperties.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsXPCOM.h"
#include "nsXPCOMCID.h"
#include "nsXULAppAPI.h"
#include "nsXULElement.h"
#include "nsXULPopupManager.h"
#include "nscore.h"
#include "prinrval.h"
#include "xpcprivate.h"
#include "xpcpublic.h"
#if defined(XP_WIN)
// Undefine LoadImage to prevent naming conflict with Windows.
# undef LoadImage
#endif
extern "C" int MOZ_XMLTranslateEntity(const char* ptr, const char* end,
const char** next, char16_t* result);
extern "C" int MOZ_XMLCheckQName(const char* ptr, const char* end, int ns_aware,
const char** colon);
using namespace mozilla::dom;
using namespace mozilla::ipc;
using namespace mozilla::gfx;
using namespace mozilla::layers;
using namespace mozilla::widget;
using namespace mozilla;
const char kLoadAsData[] = "loadAsData";
nsIXPConnect* nsContentUtils::sXPConnect;
nsIScriptSecurityManager* nsContentUtils::sSecurityManager;
nsIPrincipal* nsContentUtils::sSystemPrincipal;
nsIPrincipal* nsContentUtils::sNullSubjectPrincipal;
nsIIOService* nsContentUtils::sIOService;
nsIUUIDGenerator* nsContentUtils::sUUIDGenerator;
nsIConsoleService* nsContentUtils::sConsoleService;
nsTHashMap<nsRefPtrHashKey<nsAtom>, EventNameMapping>*
nsContentUtils::sAtomEventTable = nullptr;
nsTHashMap<nsStringHashKey, EventNameMapping>*
nsContentUtils::sStringEventTable = nullptr;
nsTArray<RefPtr<nsAtom>>* nsContentUtils::sUserDefinedEvents = nullptr;
nsIStringBundleService* nsContentUtils::sStringBundleService;
nsIStringBundle* nsContentUtils::sStringBundles[PropertiesFile_COUNT];
nsIContentPolicy* nsContentUtils::sContentPolicyService;
bool nsContentUtils::sTriedToGetContentPolicy = false;
StaticRefPtr<nsIBidiKeyboard> nsContentUtils::sBidiKeyboard;
uint32_t nsContentUtils::sScriptBlockerCount = 0;
uint32_t nsContentUtils::sDOMNodeRemovedSuppressCount = 0;
AutoTArray<nsCOMPtr<nsIRunnable>, 8>* nsContentUtils::sBlockedScriptRunners =
nullptr;
uint32_t nsContentUtils::sRunnersCountAtFirstBlocker = 0;
nsIInterfaceRequestor* nsContentUtils::sSameOriginChecker = nullptr;
bool nsContentUtils::sIsHandlingKeyBoardEvent = false;
nsString* nsContentUtils::sShiftText = nullptr;
nsString* nsContentUtils::sControlText = nullptr;
nsString* nsContentUtils::sMetaText = nullptr;
nsString* nsContentUtils::sOSText = nullptr;
nsString* nsContentUtils::sAltText = nullptr;
nsString* nsContentUtils::sModifierSeparator = nullptr;
bool nsContentUtils::sInitialized = false;
#ifndef RELEASE_OR_BETA
bool nsContentUtils::sBypassCSSOMOriginCheck = false;
#endif
nsCString* nsContentUtils::sJSBytecodeMimeType = nullptr;
nsContentUtils::UserInteractionObserver*
nsContentUtils::sUserInteractionObserver = nullptr;
nsHtml5StringParser* nsContentUtils::sHTMLFragmentParser = nullptr;
nsIParser* nsContentUtils::sXMLFragmentParser = nullptr;
nsIFragmentContentSink* nsContentUtils::sXMLFragmentSink = nullptr;
bool nsContentUtils::sFragmentParsingActive = false;
mozilla::LazyLogModule nsContentUtils::gResistFingerprintingLog(
"nsResistFingerprinting");
mozilla::LazyLogModule nsContentUtils::sDOMDumpLog("Dump");
int32_t nsContentUtils::sInnerOrOuterWindowCount = 0;
uint32_t nsContentUtils::sInnerOrOuterWindowSerialCounter = 0;
template Maybe<int32_t> nsContentUtils::ComparePoints(
const RangeBoundary& aFirstBoundary, const RangeBoundary& aSecondBoundary);
template Maybe<int32_t> nsContentUtils::ComparePoints(
const RangeBoundary& aFirstBoundary,
const RawRangeBoundary& aSecondBoundary);
template Maybe<int32_t> nsContentUtils::ComparePoints(
const RawRangeBoundary& aFirstBoundary,
const RangeBoundary& aSecondBoundary);
template Maybe<int32_t> nsContentUtils::ComparePoints(
const RawRangeBoundary& aFirstBoundary,
const RawRangeBoundary& aSecondBoundary);
template int32_t nsContentUtils::ComparePoints_Deprecated(
const RangeBoundary& aFirstBoundary, const RangeBoundary& aSecondBoundary,
bool* aDisconnected);
template int32_t nsContentUtils::ComparePoints_Deprecated(
const RangeBoundary& aFirstBoundary,
const RawRangeBoundary& aSecondBoundary, bool* aDisconnected);
template int32_t nsContentUtils::ComparePoints_Deprecated(
const RawRangeBoundary& aFirstBoundary,
const RangeBoundary& aSecondBoundary, bool* aDisconnected);
template int32_t nsContentUtils::ComparePoints_Deprecated(
const RawRangeBoundary& aFirstBoundary,
const RawRangeBoundary& aSecondBoundary, bool* aDisconnected);
// Subset of
// http://www.whatwg.org/specs/web-apps/current-work/#autofill-field-name
enum AutocompleteUnsupportedFieldName : uint8_t {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME(name_, value_) \
eAutocompleteUnsupportedFieldName_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME
};
enum AutocompleteNoPersistFieldName : uint8_t {
#define AUTOCOMPLETE_NO_PERSIST_FIELD_NAME(name_, value_) \
eAutocompleteNoPersistFieldName_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_NO_PERSIST_FIELD_NAME
};
enum AutocompleteUnsupportFieldContactHint : uint8_t {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT(name_, value_) \
eAutocompleteUnsupportedFieldContactHint_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT
};
enum AutocompleteFieldName : uint8_t {
#define AUTOCOMPLETE_FIELD_NAME(name_, value_) eAutocompleteFieldName_##name_,
#define AUTOCOMPLETE_CONTACT_FIELD_NAME(name_, value_) \
AUTOCOMPLETE_FIELD_NAME(name_, value_)
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_NAME
#undef AUTOCOMPLETE_CONTACT_FIELD_NAME
};
enum AutocompleteFieldHint : uint8_t {
#define AUTOCOMPLETE_FIELD_HINT(name_, value_) eAutocompleteFieldHint_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_HINT
};
enum AutocompleteFieldContactHint : uint8_t {
#define AUTOCOMPLETE_FIELD_CONTACT_HINT(name_, value_) \
eAutocompleteFieldContactHint_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_CONTACT_HINT
};
enum AutocompleteCategory {
#define AUTOCOMPLETE_CATEGORY(name_, value_) eAutocompleteCategory_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_CATEGORY
};
static const nsAttrValue::EnumTable kAutocompleteUnsupportedFieldNameTable[] = {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME(name_, value_) \
{value_, eAutocompleteUnsupportedFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteNoPersistFieldNameTable[] = {
#define AUTOCOMPLETE_NO_PERSIST_FIELD_NAME(name_, value_) \
{value_, eAutocompleteNoPersistFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_NO_PERSIST_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable
kAutocompleteUnsupportedContactFieldHintTable[] = {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT(name_, value_) \
{value_, eAutocompleteUnsupportedFieldContactHint_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteFieldNameTable[] = {
#define AUTOCOMPLETE_FIELD_NAME(name_, value_) \
{value_, eAutocompleteFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteContactFieldNameTable[] = {
#define AUTOCOMPLETE_CONTACT_FIELD_NAME(name_, value_) \
{value_, eAutocompleteFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_CONTACT_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteFieldHintTable[] = {
#define AUTOCOMPLETE_FIELD_HINT(name_, value_) \
{value_, eAutocompleteFieldHint_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_HINT
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteContactFieldHintTable[] = {
#define AUTOCOMPLETE_FIELD_CONTACT_HINT(name_, value_) \
{value_, eAutocompleteFieldContactHint_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_CONTACT_HINT
{nullptr, 0}};
namespace {
static NS_DEFINE_CID(kCParserCID, NS_PARSER_CID);
static PLDHashTable* sEventListenerManagersHash;
// A global hashtable to for keeping the arena alive for cross docGroup node
// adoption.
static nsRefPtrHashtable<nsPtrHashKey<const nsINode>, mozilla::dom::DOMArena>*
sDOMArenaHashtable;
class DOMEventListenerManagersHashReporter final : public nsIMemoryReporter {
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
~DOMEventListenerManagersHashReporter() = default;
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override {
// We don't measure the |EventListenerManager| objects pointed to by the
// entries because those references are non-owning.
int64_t amount =
sEventListenerManagersHash
? sEventListenerManagersHash->ShallowSizeOfIncludingThis(
MallocSizeOf)
: 0;
MOZ_COLLECT_REPORT(
"explicit/dom/event-listener-managers-hash", KIND_HEAP, UNITS_BYTES,
amount, "Memory used by the event listener manager's hash table.");
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(DOMEventListenerManagersHashReporter, nsIMemoryReporter)
class EventListenerManagerMapEntry : public PLDHashEntryHdr {
public:
explicit EventListenerManagerMapEntry(const void* aKey) : mKey(aKey) {}
~EventListenerManagerMapEntry() {
NS_ASSERTION(!mListenerManager, "caller must release and disconnect ELM");
}
protected: // declared protected to silence clang warnings
const void* mKey; // must be first, to look like PLDHashEntryStub
public:
RefPtr<EventListenerManager> mListenerManager;
};
static void EventListenerManagerHashInitEntry(PLDHashEntryHdr* entry,
const void* key) {
// Initialize the entry with placement new
new (entry) EventListenerManagerMapEntry(key);
}
static void EventListenerManagerHashClearEntry(PLDHashTable* table,
PLDHashEntryHdr* entry) {
EventListenerManagerMapEntry* lm =
static_cast<EventListenerManagerMapEntry*>(entry);
// Let the EventListenerManagerMapEntry clean itself up...
lm->~EventListenerManagerMapEntry();
}
class SameOriginCheckerImpl final : public nsIChannelEventSink,
public nsIInterfaceRequestor {
~SameOriginCheckerImpl() = default;
NS_DECL_ISUPPORTS
NS_DECL_NSICHANNELEVENTSINK
NS_DECL_NSIINTERFACEREQUESTOR
};
} // namespace
void AutoSuppressEventHandling::SuppressDocument(Document* aDoc) {
// Note: Document::SuppressEventHandling will also automatically suppress
// event handling for any in-process sub-documents. However, since we need
// to deal with cases where remote BrowsingContexts may be interleaved
// with in-process ones, we still need to walk the entire tree ourselves.
// This may be slightly redundant in some cases, but since event handling
// suppressions maintain a count of current blockers, it does not cause
// any problems.
aDoc->SuppressEventHandling();
}
void AutoSuppressEventHandling::UnsuppressDocument(Document* aDoc) {
aDoc->UnsuppressEventHandlingAndFireEvents(true);
}
AutoSuppressEventHandling::~AutoSuppressEventHandling() {
UnsuppressDocuments();
}
void AutoSuppressEventHandlingAndSuspend::SuppressDocument(Document* aDoc) {
AutoSuppressEventHandling::SuppressDocument(aDoc);
if (nsCOMPtr<nsPIDOMWindowInner> win = aDoc->GetInnerWindow()) {
win->Suspend();
mWindows.AppendElement(win);
}
}
AutoSuppressEventHandlingAndSuspend::~AutoSuppressEventHandlingAndSuspend() {
for (const auto& win : mWindows) {
win->Resume();
}
}
/**
* This class is used to determine whether or not the user is currently
* interacting with the browser. It listens to observer events to toggle the
* value of the sUserActive static.
*
* This class is an internal implementation detail.
* nsContentUtils::GetUserIsInteracting() should be used to access current
* user interaction status.
*/
class nsContentUtils::UserInteractionObserver final
: public nsIObserver,
public BackgroundHangAnnotator {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
void Init();
void Shutdown();
void AnnotateHang(BackgroundHangAnnotations& aAnnotations) override;
static Atomic<bool> sUserActive;
private:
~UserInteractionObserver() = default;
};
// static
nsresult nsContentUtils::Init() {
if (sInitialized) {
NS_WARNING("Init() called twice");
return NS_OK;
}
nsHTMLTags::AddRefTable();
sXPConnect = nsXPConnect::XPConnect();
// We hold a strong ref to sXPConnect to ensure that it does not go away until
// nsLayoutStatics::Shutdown is happening. Otherwise ~nsXPConnect can be
// triggered by xpcModuleDtor late in shutdown and cause crashes due to
// various stuff already being torn down by then. Note that this means that
// we are effectively making sure that if we leak nsLayoutStatics then we also
// leak nsXPConnect.
NS_ADDREF(sXPConnect);
sSecurityManager = nsScriptSecurityManager::GetScriptSecurityManager();
if (!sSecurityManager) return NS_ERROR_FAILURE;
NS_ADDREF(sSecurityManager);
sSecurityManager->GetSystemPrincipal(&sSystemPrincipal);
MOZ_ASSERT(sSystemPrincipal);
RefPtr<NullPrincipal> nullPrincipal =
NullPrincipal::CreateWithoutOriginAttributes();
if (!nullPrincipal) {
return NS_ERROR_FAILURE;
}
nullPrincipal.forget(&sNullSubjectPrincipal);
nsresult rv = CallGetService(NS_IOSERVICE_CONTRACTID, &sIOService);
if (NS_FAILED(rv)) {
// This makes life easier, but we can live without it.
sIOService = nullptr;
}
if (!InitializeEventTable()) return NS_ERROR_FAILURE;
if (!sEventListenerManagersHash) {
static const PLDHashTableOps hash_table_ops = {
PLDHashTable::HashVoidPtrKeyStub, PLDHashTable::MatchEntryStub,
PLDHashTable::MoveEntryStub, EventListenerManagerHashClearEntry,
EventListenerManagerHashInitEntry};
sEventListenerManagersHash =
new PLDHashTable(&hash_table_ops, sizeof(EventListenerManagerMapEntry));
RegisterStrongMemoryReporter(new DOMEventListenerManagersHashReporter());
}
sBlockedScriptRunners = new AutoTArray<nsCOMPtr<nsIRunnable>, 8>;
#ifndef RELEASE_OR_BETA
sBypassCSSOMOriginCheck = getenv("MOZ_BYPASS_CSSOM_ORIGIN_CHECK");
#endif
Element::InitCCCallbacks();
Unused << nsRFPService::GetOrCreate();
nsCOMPtr<nsIUUIDGenerator> uuidGenerator =
do_GetService("@mozilla.org/uuid-generator;1", &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
uuidGenerator.forget(&sUUIDGenerator);
if (XRE_IsParentProcess()) {
AsyncPrecreateStringBundles();
}
RefPtr<UserInteractionObserver> uio = new UserInteractionObserver();
uio->Init();
uio.forget(&sUserInteractionObserver);
sInitialized = true;
return NS_OK;
}
bool nsContentUtils::InitJSBytecodeMimeType() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!sJSBytecodeMimeType);
JS::BuildIdCharVector jsBuildId;
if (!JS::GetScriptTranscodingBuildId(&jsBuildId)) {
return false;
}
nsDependentCSubstring jsBuildIdStr(jsBuildId.begin(), jsBuildId.length());
sJSBytecodeMimeType =
new nsCString("javascript/moz-bytecode-"_ns + jsBuildIdStr);
return true;
}
void nsContentUtils::GetShiftText(nsAString& text) {
if (!sShiftText) InitializeModifierStrings();
text.Assign(*sShiftText);
}
void nsContentUtils::GetControlText(nsAString& text) {
if (!sControlText) InitializeModifierStrings();
text.Assign(*sControlText);
}
void nsContentUtils::GetMetaText(nsAString& text) {
if (!sMetaText) InitializeModifierStrings();
text.Assign(*sMetaText);
}
void nsContentUtils::GetOSText(nsAString& text) {
if (!sOSText) {
InitializeModifierStrings();
}
text.Assign(*sOSText);
}
void nsContentUtils::GetAltText(nsAString& text) {
if (!sAltText) InitializeModifierStrings();
text.Assign(*sAltText);
}
void nsContentUtils::GetModifierSeparatorText(nsAString& text) {
if (!sModifierSeparator) InitializeModifierStrings();
text.Assign(*sModifierSeparator);
}
void nsContentUtils::InitializeModifierStrings() {
// load the display strings for the keyboard accelerators
nsCOMPtr<nsIStringBundleService> bundleService =
mozilla::components::StringBundle::Service();
nsCOMPtr<nsIStringBundle> bundle;
DebugOnly<nsresult> rv = NS_OK;
if (bundleService) {
rv = bundleService->CreateBundle(
"chrome://global-platform/locale/platformKeys.properties",
getter_AddRefs(bundle));
}
NS_ASSERTION(
NS_SUCCEEDED(rv) && bundle,
"chrome://global/locale/platformKeys.properties could not be loaded");
nsAutoString shiftModifier;
nsAutoString metaModifier;
nsAutoString osModifier;
nsAutoString altModifier;
nsAutoString controlModifier;
nsAutoString modifierSeparator;
if (bundle) {
// macs use symbols for each modifier key, so fetch each from the bundle,
// which also covers i18n
bundle->GetStringFromName("VK_SHIFT", shiftModifier);
bundle->GetStringFromName("VK_META", metaModifier);
bundle->GetStringFromName("VK_WIN", osModifier);
bundle->GetStringFromName("VK_ALT", altModifier);
bundle->GetStringFromName("VK_CONTROL", controlModifier);
bundle->GetStringFromName("MODIFIER_SEPARATOR", modifierSeparator);
}
// if any of these don't exist, we get an empty string
sShiftText = new nsString(shiftModifier);
sMetaText = new nsString(metaModifier);
sOSText = new nsString(osModifier);
sAltText = new nsString(altModifier);
sControlText = new nsString(controlModifier);
sModifierSeparator = new nsString(modifierSeparator);
}
mozilla::EventClassID nsContentUtils::GetEventClassIDFromMessage(
EventMessage aEventMessage) {
switch (aEventMessage) {
#define MESSAGE_TO_EVENT(name_, message_, type_, struct_) \
case message_: \
return struct_;
#include "mozilla/EventNameList.h"
#undef MESSAGE_TO_EVENT
default:
MOZ_ASSERT_UNREACHABLE("Invalid event message?");
return eBasicEventClass;
}
}
static nsAtom* GetEventTypeFromMessage(EventMessage aEventMessage) {
switch (aEventMessage) {
#define MESSAGE_TO_EVENT(name_, message_, type_, struct_) \
case message_: \
return nsGkAtoms::on##name_;
#include "mozilla/EventNameList.h"
#undef MESSAGE_TO_EVENT
default:
return nullptr;
}
}
// Because of SVG/SMIL we have several atoms mapped to the same
// id, but we can rely on MESSAGE_TO_EVENT to map id to only one atom.
static bool ShouldAddEventToStringEventTable(const EventNameMapping& aMapping) {
MOZ_ASSERT(aMapping.mAtom);
return GetEventTypeFromMessage(aMapping.mMessage) == aMapping.mAtom;
}
bool nsContentUtils::InitializeEventTable() {
NS_ASSERTION(!sAtomEventTable, "EventTable already initialized!");
NS_ASSERTION(!sStringEventTable, "EventTable already initialized!");
static const EventNameMapping eventArray[] = {
#define EVENT(name_, _message, _type, _class) \
{nsGkAtoms::on##name_, _type, _message, _class, false},
#define WINDOW_ONLY_EVENT EVENT
#define DOCUMENT_ONLY_EVENT EVENT
#define NON_IDL_EVENT EVENT
#include "mozilla/EventNameList.h"
#undef WINDOW_ONLY_EVENT
#undef NON_IDL_EVENT
#undef EVENT
{nullptr}};
sAtomEventTable = new nsTHashMap<nsRefPtrHashKey<nsAtom>, EventNameMapping>(
ArrayLength(eventArray));
sStringEventTable = new nsTHashMap<nsStringHashKey, EventNameMapping>(
ArrayLength(eventArray));
sUserDefinedEvents = new nsTArray<RefPtr<nsAtom>>(64);
// Subtract one from the length because of the trailing null
for (uint32_t i = 0; i < ArrayLength(eventArray) - 1; ++i) {
MOZ_ASSERT(!sAtomEventTable->Contains(eventArray[i].mAtom),
"Double-defining event name; fix your EventNameList.h");
sAtomEventTable->InsertOrUpdate(eventArray[i].mAtom, eventArray[i]);
if (ShouldAddEventToStringEventTable(eventArray[i])) {
sStringEventTable->InsertOrUpdate(
Substring(nsDependentAtomString(eventArray[i].mAtom), 2),
eventArray[i]);
}
}
return true;
}
void nsContentUtils::InitializeTouchEventTable() {
static bool sEventTableInitialized = false;
if (!sEventTableInitialized && sAtomEventTable && sStringEventTable) {
sEventTableInitialized = true;
static const EventNameMapping touchEventArray[] = {
#define EVENT(name_, _message, _type, _class)
#define TOUCH_EVENT(name_, _message, _type, _class) \
{nsGkAtoms::on##name_, _type, _message, _class},
#include "mozilla/EventNameList.h"
#undef TOUCH_EVENT
#undef EVENT
{nullptr}};
// Subtract one from the length because of the trailing null
for (uint32_t i = 0; i < ArrayLength(touchEventArray) - 1; ++i) {
sAtomEventTable->InsertOrUpdate(touchEventArray[i].mAtom,
touchEventArray[i]);
sStringEventTable->InsertOrUpdate(
Substring(nsDependentAtomString(touchEventArray[i].mAtom), 2),
touchEventArray[i]);
}
}
}
static bool Is8bit(const nsAString& aString) {
static const char16_t EIGHT_BIT = char16_t(~0x00FF);
for (nsAString::const_char_iterator start = aString.BeginReading(),
end = aString.EndReading();
start != end; ++start) {
if (*start & EIGHT_BIT) {
return false;
}
}
return true;
}
nsresult nsContentUtils::Btoa(const nsAString& aBinaryData,
nsAString& aAsciiBase64String) {
if (!Is8bit(aBinaryData)) {
aAsciiBase64String.Truncate();
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
return Base64Encode(aBinaryData, aAsciiBase64String);
}
nsresult nsContentUtils::Atob(const nsAString& aAsciiBase64String,
nsAString& aBinaryData) {
if (!Is8bit(aAsciiBase64String)) {
aBinaryData.Truncate();
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
const char16_t* start = aAsciiBase64String.BeginReading();
const char16_t* cur = start;
const char16_t* end = aAsciiBase64String.EndReading();
bool hasWhitespace = false;
while (cur < end) {
if (nsContentUtils::IsHTMLWhitespace(*cur)) {
hasWhitespace = true;
break;
}
cur++;
}
nsresult rv;
if (hasWhitespace) {
nsString trimmedString;
if (!trimmedString.SetCapacity(aAsciiBase64String.Length(), fallible)) {
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
trimmedString.Append(start, cur - start);
while (cur < end) {
if (!nsContentUtils::IsHTMLWhitespace(*cur)) {
trimmedString.Append(*cur);
}
cur++;
}
rv = Base64Decode(trimmedString, aBinaryData);
} else {
rv = Base64Decode(aAsciiBase64String, aBinaryData);
}
if (NS_FAILED(rv) && rv == NS_ERROR_INVALID_ARG) {
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
return rv;
}
bool nsContentUtils::IsAutocompleteEnabled(
mozilla::dom::HTMLInputElement* aInput) {
MOZ_ASSERT(aInput, "aInput should not be null!");
nsAutoString autocomplete;
aInput->GetAutocomplete(autocomplete);
if (autocomplete.IsEmpty()) {
auto* form = aInput->GetForm();
if (!form) {
return true;
}
form->GetAutocomplete(autocomplete);
}
return !autocomplete.EqualsLiteral("off");
}
nsContentUtils::AutocompleteAttrState
nsContentUtils::SerializeAutocompleteAttribute(
const nsAttrValue* aAttr, nsAString& aResult,
AutocompleteAttrState aCachedState) {
if (!aAttr ||
aCachedState == nsContentUtils::eAutocompleteAttrState_Invalid) {
return aCachedState;
}
if (aCachedState == nsContentUtils::eAutocompleteAttrState_Valid) {
uint32_t atomCount = aAttr->GetAtomCount();
for (uint32_t i = 0; i < atomCount; i++) {
if (i != 0) {
aResult.Append(' ');
}
aResult.Append(nsDependentAtomString(aAttr->AtomAt(i)));
}
nsContentUtils::ASCIIToLower(aResult);
return aCachedState;
}
aResult.Truncate();
mozilla::dom::AutocompleteInfo info;
AutocompleteAttrState state =
InternalSerializeAutocompleteAttribute(aAttr, info);
if (state == eAutocompleteAttrState_Valid) {
// Concatenate the info fields.
aResult = info.mSection;
if (!info.mAddressType.IsEmpty()) {
if (!aResult.IsEmpty()) {
aResult += ' ';
}
aResult += info.mAddressType;
}
if (!info.mContactType.IsEmpty()) {
if (!aResult.IsEmpty()) {
aResult += ' ';
}
aResult += info.mContactType;
}
if (!info.mFieldName.IsEmpty()) {
if (!aResult.IsEmpty()) {
aResult += ' ';
}
aResult += info.mFieldName;
}
}
return state;
}
nsContentUtils::AutocompleteAttrState
nsContentUtils::SerializeAutocompleteAttribute(
const nsAttrValue* aAttr, mozilla::dom::AutocompleteInfo& aInfo,
AutocompleteAttrState aCachedState, bool aGrantAllValidValue) {
if (!aAttr ||
aCachedState == nsContentUtils::eAutocompleteAttrState_Invalid) {
return aCachedState;
}
return InternalSerializeAutocompleteAttribute(aAttr, aInfo,
aGrantAllValidValue);
}
/**
* Helper to validate the @autocomplete tokens.
*
* @return {AutocompleteAttrState} The state of the attribute (invalid/valid).
*/
nsContentUtils::AutocompleteAttrState
nsContentUtils::InternalSerializeAutocompleteAttribute(
const nsAttrValue* aAttrVal, mozilla::dom::AutocompleteInfo& aInfo,
bool aGrantAllValidValue) {
// No autocomplete attribute so we are done
if (!aAttrVal) {
return eAutocompleteAttrState_Invalid;
}
uint32_t numTokens = aAttrVal->GetAtomCount();
if (!numTokens) {
return eAutocompleteAttrState_Invalid;
}
uint32_t index = numTokens - 1;
nsString tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
AutocompleteCategory category;
nsAttrValue enumValue;
bool unsupported = false;
if (!aGrantAllValidValue) {
unsupported = enumValue.ParseEnumValue(
tokenString, kAutocompleteUnsupportedFieldNameTable, false);
if (unsupported) {
return eAutocompleteAttrState_Invalid;
}
}
nsAutoString str;
bool result =
enumValue.ParseEnumValue(tokenString, kAutocompleteFieldNameTable, false);
if (result) {
// Off/Automatic/Normal categories.
if (enumValue.Equals(u"off"_ns, eIgnoreCase) ||
enumValue.Equals(u"on"_ns, eIgnoreCase)) {
if (numTokens > 1) {
return eAutocompleteAttrState_Invalid;
}
enumValue.ToString(str);
ASCIIToLower(str);
aInfo.mFieldName.Assign(str);
aInfo.mCanAutomaticallyPersist =
!enumValue.Equals(u"off"_ns, eIgnoreCase);
return eAutocompleteAttrState_Valid;
}
// Only allow on/off if form autofill @autocomplete values aren't enabled
// and it doesn't grant all valid values.
if (!StaticPrefs::dom_forms_autocomplete_formautofill() &&
!aGrantAllValidValue) {
return eAutocompleteAttrState_Invalid;
}
// Normal category
if (numTokens > 3) {
return eAutocompleteAttrState_Invalid;
}
category = eAutocompleteCategory_NORMAL;
} else { // Check if the last token is of the contact category instead.
// Only allow on/off if form autofill @autocomplete values aren't enabled
// and it doesn't grant all valid values.
if (!StaticPrefs::dom_forms_autocomplete_formautofill() &&
!aGrantAllValidValue) {
return eAutocompleteAttrState_Invalid;
}
result = enumValue.ParseEnumValue(
tokenString, kAutocompleteContactFieldNameTable, false);
if (!result || numTokens > 4) {
return eAutocompleteAttrState_Invalid;
}
category = eAutocompleteCategory_CONTACT;
}
enumValue.ToString(str);
ASCIIToLower(str);
aInfo.mFieldName.Assign(str);
aInfo.mCanAutomaticallyPersist = !enumValue.ParseEnumValue(
tokenString, kAutocompleteNoPersistFieldNameTable, false);
// We are done if this was the only token.
if (numTokens == 1) {
return eAutocompleteAttrState_Valid;
}
--index;
tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
if (category == eAutocompleteCategory_CONTACT) {
if (!aGrantAllValidValue) {
unsupported = enumValue.ParseEnumValue(
tokenString, kAutocompleteUnsupportedContactFieldHintTable, false);
if (unsupported) {
return eAutocompleteAttrState_Invalid;
}
}
nsAttrValue contactFieldHint;
result = contactFieldHint.ParseEnumValue(
tokenString, kAutocompleteContactFieldHintTable, false);
if (result) {
nsAutoString contactFieldHintString;
contactFieldHint.ToString(contactFieldHintString);
ASCIIToLower(contactFieldHintString);
aInfo.mContactType.Assign(contactFieldHintString);
if (index == 0) {
return eAutocompleteAttrState_Valid;
}
--index;
tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
}
}
// Check for billing/shipping tokens
nsAttrValue fieldHint;
if (fieldHint.ParseEnumValue(tokenString, kAutocompleteFieldHintTable,
false)) {
nsString fieldHintString;
fieldHint.ToString(fieldHintString);
ASCIIToLower(fieldHintString);
aInfo.mAddressType.Assign(fieldHintString);
if (index == 0) {
return eAutocompleteAttrState_Valid;
}
--index;
tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
}
// Check for section-* token
const nsDependentSubstring& section = Substring(tokenString, 0, 8);
if (section.LowerCaseEqualsASCII("section-")) {
ASCIIToLower(tokenString);
aInfo.mSection.Assign(tokenString);
if (index == 0) {
return eAutocompleteAttrState_Valid;
}
}
// Clear the fields as the autocomplete attribute is invalid.
aInfo.mSection.Truncate();
aInfo.mAddressType.Truncate();
aInfo.mContactType.Truncate();
aInfo.mFieldName.Truncate();
return eAutocompleteAttrState_Invalid;
}
// Parse an integer according to HTML spec
template <class StringT>
int32_t nsContentUtils::ParseHTMLIntegerImpl(
const StringT& aValue, ParseHTMLIntegerResultFlags* aResult) {
using CharT = typename StringT::char_type;
int result = eParseHTMLInteger_NoFlags;
typename StringT::const_iterator iter, end;
aValue.BeginReading(iter);
aValue.EndReading(end);
while (iter != end && nsContentUtils::IsHTMLWhitespace(*iter)) {
result |= eParseHTMLInteger_NonStandard;
++iter;
}
if (iter == end) {
result |= eParseHTMLInteger_Error | eParseHTMLInteger_ErrorNoValue;
*aResult = (ParseHTMLIntegerResultFlags)result;
return 0;
}
int sign = 1;
if (*iter == CharT('-')) {
sign = -1;
result |= eParseHTMLInteger_Negative;
++iter;
} else if (*iter == CharT('+')) {
result |= eParseHTMLInteger_NonStandard;
++iter;
}
bool foundValue = false;
CheckedInt32 value = 0;
// Check for leading zeros first.
uint64_t leadingZeros = 0;
while (iter != end) {
if (*iter != CharT('0')) {
break;
}
++leadingZeros;
foundValue = true;
++iter;
}
while (iter != end) {
if (*iter >= CharT('0') && *iter <= CharT('9')) {
value = (value * 10) + (*iter - CharT('0')) * sign;
++iter;
if (!value.isValid()) {
result |= eParseHTMLInteger_Error | eParseHTMLInteger_ErrorOverflow;
break;
}
foundValue = true;
} else {
break;
}
}
if (!foundValue) {
result |= eParseHTMLInteger_Error | eParseHTMLInteger_ErrorNoValue;
}
if (value.isValid() &&
((leadingZeros > 1 || (leadingZeros == 1 && !(value == 0))) ||
(sign == -1 && value == 0))) {
result |= eParseHTMLInteger_NonStandard;
}
if (iter != end) {
result |= eParseHTMLInteger_DidNotConsumeAllInput;
}
*aResult = (ParseHTMLIntegerResultFlags)result;
return value.isValid() ? value.value() : 0;
}
// Parse an integer according to HTML spec
int32_t nsContentUtils::ParseHTMLInteger(const nsAString& aValue,
ParseHTMLIntegerResultFlags* aResult) {
return ParseHTMLIntegerImpl(aValue, aResult);
}
int32_t nsContentUtils::ParseHTMLInteger(const nsACString& aValue,
ParseHTMLIntegerResultFlags* aResult) {
return ParseHTMLIntegerImpl(aValue, aResult);
}
#define SKIP_WHITESPACE(iter, end_iter, end_res) \
while ((iter) != (end_iter) && nsCRT::IsAsciiSpace(*(iter))) { \
++(iter); \
} \
if ((iter) == (end_iter)) { \
return (end_res); \
}
#define SKIP_ATTR_NAME(iter, end_iter) \
while ((iter) != (end_iter) && !nsCRT::IsAsciiSpace(*(iter)) && \
*(iter) != '=') { \
++(iter); \
}
bool nsContentUtils::GetPseudoAttributeValue(const nsString& aSource,
nsAtom* aName, nsAString& aValue) {
aValue.Truncate();
const char16_t* start = aSource.get();
const char16_t* end = start + aSource.Length();
const char16_t* iter;
while (start != end) {
SKIP_WHITESPACE(start, end, false)
iter = start;
SKIP_ATTR_NAME(iter, end)
if (start == iter) {
return false;
}
// Remember the attr name.
const nsDependentSubstring& attrName = Substring(start, iter);
// Now check whether this is a valid name="value" pair.
start = iter;
SKIP_WHITESPACE(start, end, false)
if (*start != '=') {
// No '=', so this is not a name="value" pair. We don't know
// what it is, and we have no way to handle it.
return false;
}
// Have to skip the value.
++start;
SKIP_WHITESPACE(start, end, false)
char16_t q = *start;
if (q != kQuote && q != kApostrophe) {
// Not a valid quoted value, so bail.
return false;
}
++start; // Point to the first char of the value.
iter = start;
while (iter != end && *iter != q) {
++iter;
}
if (iter == end) {
// Oops, unterminated quoted string.
return false;
}
// At this point attrName holds the name of the "attribute" and
// the value is between start and iter.
if (aName->Equals(attrName)) {
// We'll accumulate as many characters as possible (until we hit either
// the end of the string or the beginning of an entity). Chunks will be
// delimited by start and chunkEnd.
const char16_t* chunkEnd = start;
while (chunkEnd != iter) {
if (*chunkEnd == kLessThan) {
aValue.Truncate();
return false;
}
if (*chunkEnd == kAmpersand) {
aValue.Append(start, chunkEnd - start);
const char16_t* afterEntity = nullptr;
char16_t result[2];
uint32_t count = MOZ_XMLTranslateEntity(
reinterpret_cast<const char*>(chunkEnd),
reinterpret_cast<const char*>(iter),
reinterpret_cast<const char**>(&afterEntity), result);
if (count == 0) {
aValue.Truncate();
return false;
}
aValue.Append(result, count);
// Advance to after the entity and begin a new chunk.
start = chunkEnd = afterEntity;
} else {
++chunkEnd;
}
}
// Append remainder.
aValue.Append(start, iter - start);
return true;
}
// Resume scanning after the end of the attribute value (past the quote
// char).
start = iter + 1;
}
return false;
}
bool nsContentUtils::IsJavaScriptLanguage(const nsString& aName) {
return aName.LowerCaseEqualsLiteral("javascript") ||
aName.LowerCaseEqualsLiteral("livescript") ||
aName.LowerCaseEqualsLiteral("mocha") ||
aName.LowerCaseEqualsLiteral("javascript1.0") ||
aName.LowerCaseEqualsLiteral("javascript1.1") ||
aName.LowerCaseEqualsLiteral("javascript1.2") ||
aName.LowerCaseEqualsLiteral("javascript1.3") ||
aName.LowerCaseEqualsLiteral("javascript1.4") ||
aName.LowerCaseEqualsLiteral("javascript1.5");
}
void nsContentUtils::SplitMimeType(const nsAString& aValue, nsString& aType,
nsString& aParams) {
aType.Truncate();
aParams.Truncate();
int32_t semiIndex = aValue.FindChar(char16_t(';'));
if (-1 != semiIndex) {
aType = Substring(aValue, 0, semiIndex);
aParams =
Substring(aValue, semiIndex + 1, aValue.Length() - (semiIndex + 1));
aParams.StripWhitespace();
} else {
aType = aValue;
}
aType.StripWhitespace();
}
nsresult nsContentUtils::IsUserIdle(uint32_t aRequestedIdleTimeInMS,
bool* aUserIsIdle) {
nsresult rv;
nsCOMPtr<nsIUserIdleService> idleService =
do_GetService("@mozilla.org/widget/useridleservice;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t idleTimeInMS;
rv = idleService->GetIdleTime(&idleTimeInMS);
NS_ENSURE_SUCCESS(rv, rv);
*aUserIsIdle = idleTimeInMS >= aRequestedIdleTimeInMS;
return NS_OK;
}
/**
* A helper function that parses a sandbox attribute (of an <iframe> or a CSP
* directive) and converts it to the set of flags used internally.
*
* @param aSandboxAttr the sandbox attribute
* @return the set of flags (SANDBOXED_NONE if aSandboxAttr is
* null)
*/
uint32_t nsContentUtils::ParseSandboxAttributeToFlags(
const nsAttrValue* aSandboxAttr) {
if (!aSandboxAttr) {
return SANDBOXED_NONE;
}
uint32_t out = SANDBOX_ALL_FLAGS;
#define SANDBOX_KEYWORD(string, atom, flags) \
if (aSandboxAttr->Contains(nsGkAtoms::atom, eIgnoreCase)) { \
out &= ~(flags); \
}
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
return out;
}
/**
* A helper function that checks if a string matches a valid sandbox flag.
*
* @param aFlag the potential sandbox flag.
* @return true if the flag is a sandbox flag.
*/
bool nsContentUtils::IsValidSandboxFlag(const nsAString& aFlag) {
#define SANDBOX_KEYWORD(string, atom, flags) \
if (EqualsIgnoreASCIICase(nsDependentAtomString(nsGkAtoms::atom), aFlag)) { \
return true; \
}
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
return false;
}
/**
* A helper function that returns a string attribute corresponding to the
* sandbox flags.
*
* @param aFlags the sandbox flags
* @param aString the attribute corresponding to the flags (null if aFlags
* is zero)
*/
void nsContentUtils::SandboxFlagsToString(uint32_t aFlags, nsAString& aString) {
if (!aFlags) {
SetDOMStringToNull(aString);
return;
}
aString.Truncate();
#define SANDBOX_KEYWORD(string, atom, flags) \
if (!(aFlags & (flags))) { \
if (!aString.IsEmpty()) { \
aString.AppendLiteral(u" "); \
} \
aString.Append(nsDependentAtomString(nsGkAtoms::atom)); \
}
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
}
nsIBidiKeyboard* nsContentUtils::GetBidiKeyboard() {
if (!sBidiKeyboard) {
sBidiKeyboard = nsIWidget::CreateBidiKeyboard();
}
return sBidiKeyboard;
}
/**
* This is used to determine whether a character is in one of the classes
* which CSS says should be part of the first-letter. Currently, that is
* all punctuation classes (P*). Note that this is a change from CSS2
* which excluded Pc and Pd.
*
* https://www.w3.org/TR/css-pseudo-4/#first-letter-pseudo
* "Punctuation (i.e, characters that belong to the Punctuation (P*) Unicode
* general category [UAX44]) [...]"
*/
// static
bool nsContentUtils::IsFirstLetterPunctuation(uint32_t aChar) {
switch (mozilla::unicode::GetGeneralCategory(aChar)) {
case HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION: /* Pc */
case HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION: /* Pd */
case HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION: /* Pe */
case HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION: /* Pf */
case HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION: /* Pi */
case HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION: /* Po */
case HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION: /* Ps */
return true;
default:
return false;
}
}
// static
bool nsContentUtils::IsAlphanumeric(uint32_t aChar) {
nsUGenCategory cat = mozilla::unicode::GetGenCategory(aChar);
return (cat == nsUGenCategory::kLetter || cat == nsUGenCategory::kNumber);
}
// static
bool nsContentUtils::IsAlphanumericOrSymbol(uint32_t aChar) {
nsUGenCategory cat = mozilla::unicode::GetGenCategory(aChar);
return cat == nsUGenCategory::kLetter || cat == nsUGenCategory::kNumber ||
cat == nsUGenCategory::kSymbol;
}
/* static */
bool nsContentUtils::IsHTMLWhitespace(char16_t aChar) {
return aChar == char16_t(0x0009) || aChar == char16_t(0x000A) ||
aChar == char16_t(0x000C) || aChar == char16_t(0x000D) ||
aChar == char16_t(0x0020);
}
/* static */
bool nsContentUtils::IsHTMLWhitespaceOrNBSP(char16_t aChar) {
return IsHTMLWhitespace(aChar) || aChar == char16_t(0xA0);
}
/* static */
bool nsContentUtils::IsHTMLBlockLevelElement(nsIContent* aContent) {
return aContent->IsAnyOfHTMLElements(
nsGkAtoms::address, nsGkAtoms::article, nsGkAtoms::aside,
nsGkAtoms::blockquote, nsGkAtoms::center, nsGkAtoms::dir, nsGkAtoms::div,
nsGkAtoms::dl, // XXX why not dt and dd?
nsGkAtoms::fieldset,
nsGkAtoms::figure, // XXX shouldn't figcaption be on this list
nsGkAtoms::footer, nsGkAtoms::form, nsGkAtoms::h1, nsGkAtoms::h2,
nsGkAtoms::h3, nsGkAtoms::h4, nsGkAtoms::h5, nsGkAtoms::h6,
nsGkAtoms::header, nsGkAtoms::hgroup, nsGkAtoms::hr, nsGkAtoms::li,
nsGkAtoms::listing, nsGkAtoms::menu, nsGkAtoms::nav, nsGkAtoms::ol,
nsGkAtoms::p, nsGkAtoms::pre, nsGkAtoms::section, nsGkAtoms::table,
nsGkAtoms::ul, nsGkAtoms::xmp);
}
/* static */
bool nsContentUtils::ParseIntMarginValue(const nsAString& aString,
nsIntMargin& result) {
nsAutoString marginStr(aString);
marginStr.CompressWhitespace(true, true);
if (marginStr.IsEmpty()) {
return false;
}
int32_t start = 0, end = 0;
for (int count = 0; count < 4; count++) {
if ((uint32_t)end >= marginStr.Length()) return false;
// top, right, bottom, left
if (count < 3)
end = Substring(marginStr, start).FindChar(',');
else
end = Substring(marginStr, start).Length();
if (end <= 0) return false;
nsresult ec;
int32_t val = nsString(Substring(marginStr, start, end)).ToInteger(&ec);
if (NS_FAILED(ec)) return false;
switch (count) {
case 0:
result.top = val;
break;
case 1:
result.right = val;
break;
case 2:
result.bottom = val;
break;
case 3:
result.left = val;
break;
}
start += end + 1;
}
return true;
}
// static
int32_t nsContentUtils::ParseLegacyFontSize(const nsAString& aValue) {
nsAString::const_iterator iter, end;
aValue.BeginReading(iter);
aValue.EndReading(end);
while (iter != end && nsContentUtils::IsHTMLWhitespace(*iter)) {
++iter;
}
if (iter == end) {
return 0;
}
bool relative = false;
bool negate = false;
if (*iter == char16_t('-')) {
relative = true;
negate = true;
++iter;
} else if (*iter == char16_t('+')) {
relative = true;
++iter;
}
if (iter == end || *iter < char16_t('0') || *iter > char16_t('9')) {
return 0;
}
// We don't have to worry about overflow, since we can bail out as soon as
// we're bigger than 7.
int32_t value = 0;
while (iter != end && *iter >= char16_t('0') && *iter <= char16_t('9')) {
value = 10 * value + (*iter - char16_t('0'));
if (value >= 7) {
break;
}
++iter;
}
if (relative) {
if (negate) {
value = 3 - value;
} else {
value = 3 + value;
}
}
return clamped(value, 1, 7);
}
/* static */
void nsContentUtils::GetOfflineAppManifest(Document* aDocument, nsIURI** aURI) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aDocument);
*aURI = nullptr;
if (aDocument->GetController().isSome()) {
return;
}
Element* docElement = aDocument->GetRootElement();
if (!docElement) {
return;
}
nsAutoString manifestSpec;
docElement->GetAttr(kNameSpaceID_None, nsGkAtoms::manifest, manifestSpec);
// Manifest URIs can't have fragment identifiers.
if (manifestSpec.IsEmpty() || manifestSpec.Contains('#')) {
return;
}
nsContentUtils::NewURIWithDocumentCharset(aURI, manifestSpec, aDocument,
aDocument->GetDocBaseURI());
}
/* static */
bool nsContentUtils::OfflineAppAllowed(nsIURI* aURI) { return false; }
/* static */
bool nsContentUtils::OfflineAppAllowed(nsIPrincipal* aPrincipal) {
return false;
}
// Static
bool nsContentUtils::IsErrorPage(nsIURI* aURI) {
if (!aURI) {
return false;
}
if (!aURI->SchemeIs("about")) {
return false;
}
nsAutoCString name;
nsresult rv = NS_GetAboutModuleName(aURI, name);
NS_ENSURE_SUCCESS(rv, false);
return name.EqualsLiteral("certerror") || name.EqualsLiteral("neterror") ||
name.EqualsLiteral("blocked");
}
// static
void nsContentUtils::Shutdown() {
sInitialized = false;
nsHTMLTags::ReleaseTable();
NS_IF_RELEASE(sContentPolicyService);
sTriedToGetContentPolicy = false;
uint32_t i;
for (i = 0; i < PropertiesFile_COUNT; ++i) NS_IF_RELEASE(sStringBundles[i]);
NS_IF_RELEASE(sStringBundleService);
NS_IF_RELEASE(sConsoleService);
NS_IF_RELEASE(sXPConnect);
NS_IF_RELEASE(sSecurityManager);
NS_IF_RELEASE(sSystemPrincipal);
NS_IF_RELEASE(sNullSubjectPrincipal);
NS_IF_RELEASE(sIOService);
NS_IF_RELEASE(sUUIDGenerator);
sBidiKeyboard = nullptr;
delete sAtomEventTable;
sAtomEventTable = nullptr;
delete sStringEventTable;
sStringEventTable = nullptr;
delete sUserDefinedEvents;
sUserDefinedEvents = nullptr;
if (sEventListenerManagersHash) {
NS_ASSERTION(sEventListenerManagersHash->EntryCount() == 0,
"Event listener manager hash not empty at shutdown!");
// See comment above.
// However, we have to handle this table differently. If it still
// has entries, we want to leak it too, so that we can keep it alive
// in case any elements are destroyed. Because if they are, we need
// their event listener managers to be destroyed too, or otherwise
// it could leave dangling references in DOMClassInfo's preserved
// wrapper table.
if (sEventListenerManagersHash->EntryCount() == 0) {
delete sEventListenerManagersHash;
sEventListenerManagersHash = nullptr;
}
}
if (sDOMArenaHashtable) {
MOZ_ASSERT(sDOMArenaHashtable->Count() == 0);
MOZ_ASSERT(StaticPrefs::dom_arena_allocator_enabled_AtStartup());
delete sDOMArenaHashtable;
sDOMArenaHashtable = nullptr;
}
NS_ASSERTION(!sBlockedScriptRunners || sBlockedScriptRunners->Length() == 0,
"How'd this happen?");
delete sBlockedScriptRunners;
sBlockedScriptRunners = nullptr;
delete sShiftText;
sShiftText = nullptr;
delete sControlText;
sControlText = nullptr;
delete sMetaText;
sMetaText = nullptr;
delete sOSText;
sOSText = nullptr;
delete sAltText;
sAltText = nullptr;
delete sModifierSeparator;
sModifierSeparator = nullptr;
delete sJSBytecodeMimeType;
sJSBytecodeMimeType = nullptr;
NS_IF_RELEASE(sSameOriginChecker);
if (sUserInteractionObserver) {
sUserInteractionObserver->Shutdown();
NS_RELEASE(sUserInteractionObserver);
}
TextControlState::Shutdown();
nsMappedAttributes::Shutdown();
}
/**
* Checks whether two nodes come from the same origin. aTrustedNode is
* considered 'safe' in that a user can operate on it.
*/
// static
nsresult nsContentUtils::CheckSameOrigin(const nsINode* aTrustedNode,
const nsINode* unTrustedNode) {
MOZ_ASSERT(aTrustedNode);
MOZ_ASSERT(unTrustedNode);
/*
* Get hold of each node's principal
*/
nsIPrincipal* trustedPrincipal = aTrustedNode->NodePrincipal();
nsIPrincipal* unTrustedPrincipal = unTrustedNode->NodePrincipal();
if (trustedPrincipal == unTrustedPrincipal) {
return NS_OK;
}
bool equal;
// XXXbz should we actually have a Subsumes() check here instead? Or perhaps
// a separate method for that, with callers using one or the other?
if (NS_FAILED(trustedPrincipal->Equals(unTrustedPrincipal, &equal)) ||
!equal) {
return NS_ERROR_DOM_PROP_ACCESS_DENIED;
}
return NS_OK;
}
// static
bool nsContentUtils::CanCallerAccess(nsIPrincipal* aSubjectPrincipal,
nsIPrincipal* aPrincipal) {
bool subsumes;
nsresult rv = aSubjectPrincipal->Subsumes(aPrincipal, &subsumes);
NS_ENSURE_SUCCESS(rv, false);
if (subsumes) {
return true;
}
// The subject doesn't subsume aPrincipal. Allow access only if the subject
// is chrome.
return IsCallerChrome();
}
// static
bool nsContentUtils::CanCallerAccess(const nsINode* aNode) {
nsIPrincipal* subject = SubjectPrincipal();
if (subject->IsSystemPrincipal()) {
return true;
}
if (aNode->ChromeOnlyAccess()) {
return false;
}
return CanCallerAccess(subject, aNode->NodePrincipal());
}
// static
bool nsContentUtils::CanCallerAccess(nsPIDOMWindowInner* aWindow) {
nsCOMPtr<nsIScriptObjectPrincipal> scriptObject = do_QueryInterface(aWindow);
NS_ENSURE_TRUE(scriptObject, false);
return CanCallerAccess(SubjectPrincipal(), scriptObject->GetPrincipal());
}
// static
bool nsContentUtils::PrincipalHasPermission(nsIPrincipal& aPrincipal,
const nsAtom* aPerm) {
// Chrome gets access by default.
if (aPrincipal.IsSystemPrincipal()) {
return true;
}
// Otherwise, only allow if caller is an addon with the permission.
return BasePrincipal::Cast(aPrincipal).AddonHasPermission(aPerm);
}
// static
bool nsContentUtils::CallerHasPermission(JSContext* aCx, const nsAtom* aPerm) {
return PrincipalHasPermission(*SubjectPrincipal(aCx), aPerm);
}
// static
nsIPrincipal* nsContentUtils::GetAttrTriggeringPrincipal(
nsIContent* aContent, const nsAString& aAttrValue,
nsIPrincipal* aSubjectPrincipal) {
nsIPrincipal* contentPrin = aContent ? aContent->NodePrincipal() : nullptr;
// If the subject principal is the same as the content principal, or no
// explicit subject principal was provided, we don't need to do any further
// checks. Just return the content principal.
if (contentPrin == aSubjectPrincipal || !aSubjectPrincipal) {
return contentPrin;
}
// Only use the subject principal if the URL string we are going to end up
// fetching is under the control of that principal, which is never the case
// for relative URLs.
if (aAttrValue.IsEmpty() ||
!IsAbsoluteURL(NS_ConvertUTF16toUTF8(aAttrValue))) {
return contentPrin;
}
// Only use the subject principal as the attr triggering principal if it
// should override the CSP of the node's principal.
if (BasePrincipal::Cast(aSubjectPrincipal)->OverridesCSP(contentPrin)) {
return aSubjectPrincipal;
}
return contentPrin;
}
// static
bool nsContentUtils::IsAbsoluteURL(const nsACString& aURL) {
nsAutoCString scheme;
if (NS_FAILED(net_ExtractURLScheme(aURL, scheme))) {
// If we can't extract a scheme, it's not an absolute URL.
return false;
}
// If it parses as an absolute StandardURL, it's definitely an absolute URL,
// so no need to check with the IO service.
if (net_IsAbsoluteURL(aURL)) {
return true;
}
uint32_t flags;
if (NS_SUCCEEDED(sIOService->GetProtocolFlags(scheme.get(), &flags))) {
return flags & nsIProtocolHandler::URI_NORELATIVE;
}
return false;
}
// static
bool nsContentUtils::InProlog(nsINode* aNode) {
MOZ_ASSERT(aNode, "missing node to nsContentUtils::InProlog");
nsINode* parent = aNode->GetParentNode();
if (!parent || !parent->IsDocument()) {
return false;
}
Document* doc = parent->AsDocument();
nsIContent* root = doc->GetRootElement();
return !root || doc->ComputeIndexOf(aNode) < doc->ComputeIndexOf(root);
}
bool nsContentUtils::IsCallerChrome() {
MOZ_ASSERT(NS_IsMainThread());
return SubjectPrincipal() == sSystemPrincipal;
}
#ifdef FUZZING
bool nsContentUtils::IsFuzzingEnabled() {
return StaticPrefs::fuzzing_enabled();
}
#endif
/* static */
bool nsContentUtils::IsCallerChromeOrElementTransformGettersEnabled(
JSContext* aCx, JSObject*) {
return ThreadsafeIsSystemCaller(aCx) ||
StaticPrefs::dom_element_transform_getters_enabled();
}
/* static */
bool nsContentUtils::IsCallerChromeOrErrorPage(JSContext* aCx,
JSObject* aObject) {
if (ThreadsafeIsSystemCaller(aCx)) {
return true;
}
nsGlobalWindowInner* win =
xpc::WindowGlobalOrNull(js::UncheckedUnwrap(aObject));
if (!win) {
return false;
}
Document* doc = win->GetExtantDoc();
return doc && IsErrorPage(doc->GetDocumentURI());
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting() {
return StaticPrefs::privacy_resistFingerprinting();
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(
nsIGlobalObject* aGlobalObject) {
if (!aGlobalObject) {
return ShouldResistFingerprinting();
}
return aGlobalObject->ShouldResistFingerprinting();
}
bool nsContentUtils::ShouldResistFingerprinting(nsIDocShell* aDocShell) {
if (!aDocShell) {
return ShouldResistFingerprinting();
}
return ShouldResistFingerprinting(aDocShell->GetDocument());
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(const Document* aDoc) {
if (!aDoc) {
MOZ_LOG(nsContentUtils::ResistFingerprintingLog(), LogLevel::Info,
("Called nsContentUtils::ShouldResistFingerprinting(const "
"Document* aDoc) with NULL document"));
return ShouldResistFingerprinting();
}
bool isChrome = nsContentUtils::IsChromeDoc(aDoc);
if (isChrome) {
return false;
}
return ShouldResistFingerprinting(aDoc->GetChannel());
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(nsIPrincipal* aPrincipal) {
if (!aPrincipal) {
return ShouldResistFingerprinting();
}
bool isChrome = aPrincipal->IsSystemPrincipal();
return !isChrome && ShouldResistFingerprinting();
}
inline void LogDomainAndPrefList(const char* exemptedDomainsPrefName,
nsAutoCString& url, bool isExemptDomain) {
nsAutoCString list;
Preferences::GetCString(exemptedDomainsPrefName, list);
MOZ_LOG(nsContentUtils::ResistFingerprintingLog(), LogLevel::Debug,
("Domain \"%s\" is %s the exempt list \"%s\"",
PromiseFlatCString(url).get(), isExemptDomain ? "in" : "NOT in",
PromiseFlatCString(list).get()));
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(nsIChannel* aChannel) {
const unsigned int webExtensionExemptMask = 0x01;
const unsigned int nonPBMExemptMask = 0x02;
const unsigned int specificDomainsExemptMask = 0x04;
if (!ShouldResistFingerprinting()) {
return false;
}
if (!aChannel) {
MOZ_LOG(nsContentUtils::ResistFingerprintingLog(), LogLevel::Info,
("Called nsContentUtils::ShouldResistFingerprinting(nsIChannel* "
"aChannel) with NULL channel"));
return true;
}
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
if (StaticPrefs::privacy_resistFingerprinting_testGranularityMask() &
nonPBMExemptMask) {
// if non-PBM exempt mask is true, exempt non-PBM channels.
if (loadInfo->GetOriginAttributes().mPrivateBrowsingId == 0) {
return false;
}
}
bool isExemptDomain = false;
const char* exemptedDomainsPrefName =
"privacy.resistFingerprinting.exemptedDomains";
if (loadInfo->GetExternalContentPolicyType() ==
ExtContentPolicy::TYPE_DOCUMENT) {
// Case 1: Top Level Load
nsCOMPtr<nsIURI> channelURI;
nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(channelURI));
MOZ_ASSERT(
NS_SUCCEEDED(rv),
"Failed to get URI in "
"nsContentUtils::ShouldResistFingerprinting(nsIChannel* aChannel)");
// this check is to ensure that we do not crash in non-debug builds.
if (NS_FAILED(rv)) {
return true;
}
// Exclude internal schemes
if (channelURI->SchemeIs("about") || channelURI->SchemeIs("chrome") ||
channelURI->SchemeIs("resource") ||
channelURI->SchemeIs("view-source")) {
return false;
}
if (StaticPrefs::privacy_resistFingerprinting_testGranularityMask() &
webExtensionExemptMask) {
if (channelURI->SchemeIs("web-extension")) {
return false;
}
}
if (StaticPrefs::privacy_resistFingerprinting_testGranularityMask() &
specificDomainsExemptMask) {
nsAutoCString list;
Preferences::GetCString(exemptedDomainsPrefName, list);
ToLowerCase(list);
isExemptDomain = IsURIInList(channelURI, list);
if (MOZ_LOG_TEST(nsContentUtils::ResistFingerprintingLog(),
mozilla::LogLevel::Debug)) {
nsAutoCString url;
channelURI->GetHost(url);
LogDomainAndPrefList(exemptedDomainsPrefName, url, isExemptDomain);
}
}
return !isExemptDomain;
}
// Case 2: Subresource Load
nsIPrincipal* loadingPrincipal = loadInfo->GetLoadingPrincipal();
// If it is not a document load then we are promised that the
// loadingPrincipal is not null.
MOZ_RELEASE_ASSERT(
loadingPrincipal,
"Got NULL loadingPrincipal in "
"nsContentUtils::ShouldResistFingerprinting(nsIChannel* aChannel)");
if (loadingPrincipal->IsSystemPrincipal()) {
MOZ_LOG(nsContentUtils::ResistFingerprintingLog(), LogLevel::Info,
("Called nsContentUtils::ShouldResistFingerprinting(nsIChannel* "
"aChannel) with a system loadingPrincipal"));
return false;
}
if (StaticPrefs::privacy_resistFingerprinting_testGranularityMask() &
webExtensionExemptMask) {
if (BasePrincipal::Cast(loadingPrincipal)->AddonPolicy()) {
return false;
}
}
if (StaticPrefs::privacy_resistFingerprinting_testGranularityMask() &
specificDomainsExemptMask) {
loadingPrincipal->IsURIInPrefList(exemptedDomainsPrefName, &isExemptDomain);
if (MOZ_LOG_TEST(nsContentUtils::ResistFingerprintingLog(),
mozilla::LogLevel::Debug)) {
nsAutoCString origin;
loadingPrincipal->GetAsciiOrigin(origin);
LogDomainAndPrefList(exemptedDomainsPrefName, origin, isExemptDomain);
}
}
return !isExemptDomain;
}
/* static */
bool nsContentUtils::UseStandinsForNativeColors() {
return ShouldResistFingerprinting() ||
StaticPrefs::ui_use_standins_for_native_colors();
}
/* static */
void nsContentUtils::CalcRoundedWindowSizeForResistingFingerprinting(
int32_t aChromeWidth, int32_t aChromeHeight, int32_t aScreenWidth,
int32_t aScreenHeight, int32_t aInputWidth, int32_t aInputHeight,
bool aSetOuterWidth, bool aSetOuterHeight, int32_t* aOutputWidth,
int32_t* aOutputHeight) {
MOZ_ASSERT(aOutputWidth);
MOZ_ASSERT(aOutputHeight);
int32_t availContentWidth = 0;
int32_t availContentHeight = 0;
availContentWidth = std::min(StaticPrefs::privacy_window_maxInnerWidth(),
aScreenWidth - aChromeWidth);
#ifdef MOZ_WIDGET_GTK
// In the GTK window, it will not report outside system decorations
// when we get available window size, see Bug 581863. So, we leave a
// 40 pixels space for them when calculating the available content
// height. It is not necessary for the width since the content width
// is usually pretty much the same as the chrome width.
availContentHeight = std::min(StaticPrefs::privacy_window_maxInnerHeight(),
(-40 + aScreenHeight) - aChromeHeight);
#else
availContentHeight = std::min(StaticPrefs::privacy_window_maxInnerHeight(),
aScreenHeight - aChromeHeight);
#endif
// Ideally, we'd like to round window size to 1000x1000, but the
// screen space could be too small to accommodate this size in some
// cases. If it happens, we would round the window size to the nearest
// 200x100.
availContentWidth = availContentWidth - (availContentWidth % 200);
availContentHeight = availContentHeight - (availContentHeight % 100);
// If aIsOuter is true, we are setting the outer window. So we
// have to consider the chrome UI.
int32_t chromeOffsetWidth = aSetOuterWidth ? aChromeWidth : 0;
int32_t chromeOffsetHeight = aSetOuterHeight ? aChromeHeight : 0;
int32_t resultWidth = 0, resultHeight = 0;
// if the original size is greater than the maximum available size, we set
// it to the maximum size. And if the original value is less than the
// minimum rounded size, we set it to the minimum 200x100.
if (aInputWidth > (availContentWidth + chromeOffsetWidth)) {
resultWidth = availContentWidth + chromeOffsetWidth;
} else if (aInputWidth < (200 + chromeOffsetWidth)) {
resultWidth = 200 + chromeOffsetWidth;
} else {
// Otherwise, we round the window to the nearest upper rounded 200x100.
resultWidth = NSToIntCeil((aInputWidth - chromeOffsetWidth) / 200.0) * 200 +
chromeOffsetWidth;
}
if (aInputHeight > (availContentHeight + chromeOffsetHeight)) {
resultHeight = availContentHeight + chromeOffsetHeight;
} else if (aInputHeight < (100 + chromeOffsetHeight)) {
resultHeight = 100 + chromeOffsetHeight;
} else {
resultHeight =
NSToIntCeil((aInputHeight - chromeOffsetHeight) / 100.0) * 100 +
chromeOffsetHeight;
}
*aOutputWidth = resultWidth;
*aOutputHeight = resultHeight;
}
bool nsContentUtils::ThreadsafeIsCallerChrome() {
return NS_IsMainThread() ? IsCallerChrome()
: IsCurrentThreadRunningChromeWorker();
}
bool nsContentUtils::IsCallerUAWidget() {
JSContext* cx = GetCurrentJSContext();
if (!cx) {
return false;
}
JS::Realm* realm = JS::GetCurrentRealmOrNull(cx);
if (!realm) {
return false;
}
return xpc::IsUAWidgetScope(realm);
}
bool nsContentUtils::IsSystemCaller(JSContext* aCx) {
// Note that SubjectPrincipal() assumes we are in a compartment here.
return SubjectPrincipal(aCx) == sSystemPrincipal;
}
bool nsContentUtils::ThreadsafeIsSystemCaller(JSContext* aCx) {
CycleCollectedJSContext* ccjscx = CycleCollectedJSContext::Get();
MOZ_ASSERT(ccjscx->Context() == aCx);
return ccjscx->IsSystemCaller();
}
// static
bool nsContentUtils::LookupBindingMember(
JSContext* aCx, nsIContent* aContent, JS::Handle<jsid> aId,
JS::MutableHandle<JS::PropertyDescriptor> aDesc) {
return true;
}
nsINode* nsContentUtils::GetNearestInProcessCrossDocParentNode(
nsINode* aChild) {
if (aChild->IsDocument()) {
for (BrowsingContext* bc = aChild->AsDocument()->GetBrowsingContext(); bc;
bc = bc->GetParent()) {
if (bc->GetEmbedderElement()) {
return bc->GetEmbedderElement();
}
}
return nullptr;
}
nsINode* parent = aChild->GetParentNode();
if (parent && parent->IsContent() && aChild->IsContent()) {
parent = aChild->AsContent()->GetFlattenedTreeParent();
}
return parent;
}
bool nsContentUtils::ContentIsHostIncludingDescendantOf(
const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) return true;
if (aPossibleDescendant->IsDocumentFragment()) {
aPossibleDescendant =
aPossibleDescendant->AsDocumentFragment()->GetHost();
} else {
aPossibleDescendant = aPossibleDescendant->GetParentNode();
}
} while (aPossibleDescendant);
return false;
}
// static
bool nsContentUtils::ContentIsCrossDocDescendantOf(nsINode* aPossibleDescendant,
nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) {
return true;
}
aPossibleDescendant =
GetNearestInProcessCrossDocParentNode(aPossibleDescendant);
} while (aPossibleDescendant);
return false;
}
// static
bool nsContentUtils::ContentIsFlattenedTreeDescendantOf(
const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) {
return true;
}
aPossibleDescendant = aPossibleDescendant->GetFlattenedTreeParentNode();
} while (aPossibleDescendant);
return false;
}
// static
bool nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(
const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) {
return true;
}
aPossibleDescendant =
aPossibleDescendant->GetFlattenedTreeParentNodeForStyle();
} while (aPossibleDescendant);
return false;
}
// static
nsINode* nsContentUtils::Retarget(nsINode* aTargetA, nsINode* aTargetB) {
while (true && aTargetA) {
// If A's root is not a shadow root...
nsINode* root = aTargetA->SubtreeRoot();
if (!root->IsShadowRoot()) {
// ...then return A.
return aTargetA;
}
// or A's root is a shadow-including inclusive ancestor of B...
if (aTargetB->IsShadowIncludingInclusiveDescendantOf(root)) {
// ...then return A.
return aTargetA;
}
aTargetA = ShadowRoot::FromNode(root)->GetHost();
}
return nullptr;
}
// static
nsresult nsContentUtils::GetInclusiveAncestors(nsINode* aNode,
nsTArray<nsINode*>& aArray) {
while (aNode) {
aArray.AppendElement(aNode);
aNode = aNode->GetParentNode();
}
return NS_OK;
}
// static
nsresult nsContentUtils::GetInclusiveAncestorsAndOffsets(
nsINode* aNode, int32_t aOffset, nsTArray<nsIContent*>* aAncestorNodes,
nsTArray<int32_t>* aAncestorOffsets) {
NS_ENSURE_ARG_POINTER(aNode);
if (!aNode->IsContent()) {
return NS_ERROR_FAILURE;
}
nsIContent* content = aNode->AsContent();
if (!aAncestorNodes->IsEmpty()) {
NS_WARNING("aAncestorNodes is not empty");
aAncestorNodes->Clear();
}
if (!aAncestorOffsets->IsEmpty()) {
NS_WARNING("aAncestorOffsets is not empty");
aAncestorOffsets->Clear();
}
// insert the node itself
aAncestorNodes->AppendElement(content);
aAncestorOffsets->AppendElement(aOffset);
// insert all the ancestors
nsIContent* child = content;
nsIContent* parent = child->GetParent();
while (parent) {
aAncestorNodes->AppendElement(parent);
aAncestorOffsets->AppendElement(parent->ComputeIndexOf(child));
child = parent;
parent = parent->GetParent();
}
return NS_OK;
}
template <typename Node, typename GetParentFunc>
static Node* GetCommonAncestorInternal(Node* aNode1, Node* aNode2,
GetParentFunc aGetParentFunc) {
MOZ_ASSERT(aNode1 != aNode2);
// Build the chain of parents
AutoTArray<Node*, 30> parents1, parents2;
do {
parents1.AppendElement(aNode1);
aNode1 = aGetParentFunc(aNode1);
} while (aNode1);
do {
parents2.AppendElement(aNode2);
aNode2 = aGetParentFunc(aNode2);
} while (aNode2);
// Find where the parent chain differs
uint32_t pos1 = parents1.Length();
uint32_t pos2 = parents2.Length();
Node* parent = nullptr;
uint32_t len;
for (len = std::min(pos1, pos2); len > 0; --len) {
Node* child1 = parents1.ElementAt(--pos1);
Node* child2 = parents2.ElementAt(--pos2);
if (child1 != child2) {
break;
}
parent = child1;
}
return parent;
}
/* static */
nsINode* nsContentUtils::GetCommonAncestorHelper(nsINode* aNode1,
nsINode* aNode2) {
return GetCommonAncestorInternal(
aNode1, aNode2, [](nsINode* aNode) { return aNode->GetParentNode(); });
}
/* static */
nsIContent* nsContentUtils::GetCommonFlattenedTreeAncestorHelper(
nsIContent* aContent1, nsIContent* aContent2) {
return GetCommonAncestorInternal(
aContent1, aContent2,
[](nsIContent* aContent) { return aContent->GetFlattenedTreeParent(); });
}
/* static */
Element* nsContentUtils::GetCommonFlattenedTreeAncestorForStyle(
Element* aElement1, Element* aElement2) {
return GetCommonAncestorInternal(aElement1, aElement2, [](Element* aElement) {
return aElement->GetFlattenedTreeParentElementForStyle();
});
}
/* static */
bool nsContentUtils::PositionIsBefore(nsINode* aNode1, nsINode* aNode2,
int32_t* aNode1Index,
int32_t* aNode2Index) {
// Note, CompareDocumentPosition takes the latter params in different order.
return (aNode2->CompareDocumentPosition(*aNode1, aNode2Index, aNode1Index) &
(Node_Binding::DOCUMENT_POSITION_PRECEDING |
Node_Binding::DOCUMENT_POSITION_DISCONNECTED)) ==
Node_Binding::DOCUMENT_POSITION_PRECEDING;
}
/* static */
Maybe<int32_t> nsContentUtils::ComparePoints(
const nsINode* aParent1, int32_t aOffset1, const nsINode* aParent2,
int32_t aOffset2, ComparePointsCache* aParent1Cache) {
bool disconnected{false};
const int32_t order = ComparePoints_Deprecated(
aParent1, aOffset1, aParent2, aOffset2, &disconnected, aParent1Cache);
if (disconnected) {
return Nothing();
}
return Some(order);
}
/* static */
int32_t nsContentUtils::ComparePoints_Deprecated(
const nsINode* aParent1, int32_t aOffset1, const nsINode* aParent2,
int32_t aOffset2, bool* aDisconnected, ComparePointsCache* aParent1Cache) {
if (aParent1 == aParent2) {
// XXX This is odd. aOffset1 and/or aOffset2 may be -1, e.g., it's result
// of nsINode::ComputeIndexOf(), but this compares such invalid
// offset with valid offset.
return aOffset1 < aOffset2 ? -1 : aOffset1 > aOffset2 ? 1 : 0;
}
AutoTArray<const nsINode*, 32> parents1, parents2;
const nsINode* node1 = aParent1;
const nsINode* node2 = aParent2;
do {
parents1.AppendElement(node1);
node1 = node1->GetParentNode();
} while (node1);
do {
parents2.AppendElement(node2);
node2 = node2->GetParentNode();
} while (node2);
uint32_t pos1 = parents1.Length() - 1;
uint32_t pos2 = parents2.Length() - 1;
bool disconnected = parents1.ElementAt(pos1) != parents2.ElementAt(pos2);
if (aDisconnected) {
*aDisconnected = disconnected;
}
if (disconnected) {
NS_ASSERTION(aDisconnected, "unexpected disconnected nodes");
return 1;
}
// Find where the parent chains differ
const nsINode* parent = parents1.ElementAt(pos1);
uint32_t len;
for (len = std::min(pos1, pos2); len > 0; --len) {
const nsINode* child1 = parents1.ElementAt(--pos1);
const nsINode* child2 = parents2.ElementAt(--pos2);
if (child1 != child2) {
int32_t child1index = aParent1Cache
? aParent1Cache->ComputeIndexOf(parent, child1)
: parent->ComputeIndexOf(child1);
return child1index < parent->ComputeIndexOf(child2) ? -1 : 1;
}
parent = child1;
}
// The parent chains never differed, so one of the nodes is an ancestor of
// the other
NS_ASSERTION(!pos1 || !pos2,
"should have run out of parent chain for one of the nodes");
if (!pos1) {
const nsINode* child2 = parents2.ElementAt(--pos2);
// XXX aOffset1 may be -1 as mentioned above. So, why does this return
// it's *before* of the valid DOM point?
return aOffset1 <= parent->ComputeIndexOf(child2) ? -1 : 1;
}
const nsINode* child1 = parents1.ElementAt(--pos1);
// XXX aOffset2 may be -1 as mentioned above. So, why does this return it's
// *after* of the valid DOM point?
int32_t child1index = aParent1Cache
? aParent1Cache->ComputeIndexOf(parent, child1)
: parent->ComputeIndexOf(child1);
return child1index < aOffset2 ? -1 : 1;
}
// static
nsINode* nsContentUtils::GetCommonAncestorUnderInteractiveContent(
nsINode* aNode1, nsINode* aNode2) {
if (!aNode1 || !aNode2) {
return nullptr;
}
if (aNode1 == aNode2) {
return aNode1;
}
// Build the chain of parents
AutoTArray<nsINode*, 30> parents1;
do {
parents1.AppendElement(aNode1);
if (aNode1->IsElement() &&
aNode1->AsElement()->IsInteractiveHTMLContent()) {
break;
}
aNode1 = aNode1->GetFlattenedTreeParentNode();
} while (aNode1);
AutoTArray<nsINode*, 30> parents2;
do {
parents2.AppendElement(aNode2);
if (aNode2->IsElement() &&
aNode2->AsElement()->IsInteractiveHTMLContent()) {
break;
}
aNode2 = aNode2->GetFlattenedTreeParentNode();
} while (aNode2);
// Find where the parent chain differs
uint32_t pos1 = parents1.Length();
uint32_t pos2 = parents2.Length();
nsINode* parent = nullptr;
for (uint32_t len = std::min(pos1, pos2); len > 0; --len) {
nsINode* child1 = parents1.ElementAt(--pos1);
nsINode* child2 = parents2.ElementAt(--pos2);
if (child1 != child2) {
break;
}
parent = child1;
}
return parent;
}
/* static */
BrowserParent* nsContentUtils::GetCommonBrowserParentAncestor(
BrowserParent* aBrowserParent1, BrowserParent* aBrowserParent2) {
return GetCommonAncestorInternal(
aBrowserParent1, aBrowserParent2, [](BrowserParent* aBrowserParent) {
return aBrowserParent->GetBrowserBridgeParent()
? aBrowserParent->GetBrowserBridgeParent()->Manager()
: nullptr;
});
}
/* static */
template <typename FPT, typename FRT, typename SPT, typename SRT>
Maybe<int32_t> nsContentUtils::ComparePoints(
const RangeBoundaryBase<FPT, FRT>& aFirstBoundary,
const RangeBoundaryBase<SPT, SRT>& aSecondBoundary) {
if (!aFirstBoundary.IsSet() || !aSecondBoundary.IsSet()) {
return Nothing{};
}
bool disconnected{false};
const int32_t order =
ComparePoints_Deprecated(aFirstBoundary, aSecondBoundary, &disconnected);
if (disconnected) {
return Nothing{};
}
return Some(order);
}
/* static */
template <typename FPT, typename FRT, typename SPT, typename SRT>
int32_t nsContentUtils::ComparePoints_Deprecated(
const RangeBoundaryBase<FPT, FRT>& aFirstBoundary,
const RangeBoundaryBase<SPT, SRT>& aSecondBoundary, bool* aDisconnected) {
if (NS_WARN_IF(!aFirstBoundary.IsSet()) ||
NS_WARN_IF(!aSecondBoundary.IsSet())) {
return -1;
}
// XXX Re-implement this without calling `Offset()` as far as possible,
// and the other overload should be an alias of this.
return ComparePoints_Deprecated(
aFirstBoundary.Container(),
*aFirstBoundary.Offset(
RangeBoundaryBase<FPT, FRT>::OffsetFilter::kValidOrInvalidOffsets),
aSecondBoundary.Container(),
*aSecondBoundary.Offset(
RangeBoundaryBase<SPT, SRT>::OffsetFilter::kValidOrInvalidOffsets),
aDisconnected);
}
inline bool IsCharInSet(const char* aSet, const char16_t aChar) {
char16_t ch;
while ((ch = *aSet)) {
if (aChar == char16_t(ch)) {
return true;
}
++aSet;
}
return false;
}
/**
* This method strips leading/trailing chars, in given set, from string.
*/
// static
const nsDependentSubstring nsContentUtils::TrimCharsInSet(
const char* aSet, const nsAString& aValue) {
nsAString::const_iterator valueCurrent, valueEnd;
aValue.BeginReading(valueCurrent);
aValue.EndReading(valueEnd);
// Skip characters in the beginning
while (valueCurrent != valueEnd) {
if (!IsCharInSet(aSet, *valueCurrent)) {
break;
}
++valueCurrent;
}
if (valueCurrent != valueEnd) {
for (;;) {
--valueEnd;
if (!IsCharInSet(aSet, *valueEnd)) {
break;
}
}
++valueEnd; // Step beyond the last character we want in the value.
}
// valueEnd should point to the char after the last to copy
return Substring(valueCurrent, valueEnd);
}
/**
* This method strips leading and trailing whitespace from a string.
*/
// static
template <bool IsWhitespace(char16_t)>
const nsDependentSubstring nsContentUtils::TrimWhitespace(const nsAString& aStr,
bool aTrimTrailing) {
nsAString::const_iterator start, end;
aStr.BeginReading(start);
aStr.EndReading(end);
// Skip whitespace characters in the beginning
while (start != end && IsWhitespace(*start)) {
++start;
}
if (aTrimTrailing) {
// Skip whitespace characters in the end.
while (end != start) {
--end;
if (!IsWhitespace(*end)) {
// Step back to the last non-whitespace character.
++end;
break;
}
}
}
// Return a substring for the string w/o leading and/or trailing
// whitespace
return Substring(start, end);
}
// Declaring the templates we are going to use avoid linking issues without
// inlining the method. Considering there is not so much spaces checking
// methods we can consider this to be better than inlining.
template const nsDependentSubstring
nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(const nsAString&, bool);
template const nsDependentSubstring nsContentUtils::TrimWhitespace<
nsContentUtils::IsHTMLWhitespace>(const nsAString&, bool);
template const nsDependentSubstring nsContentUtils::TrimWhitespace<
nsContentUtils::IsHTMLWhitespaceOrNBSP>(const nsAString&, bool);
static inline void KeyAppendSep(nsACString& aKey) {
if (!aKey.IsEmpty()) {
aKey.Append('>');
}
}
static inline void KeyAppendString(const nsAString& aString, nsACString& aKey) {
KeyAppendSep(aKey);
// Could escape separator here if collisions happen. > is not a legal char
// for a name or type attribute, so we should be safe avoiding that extra
// work.
AppendUTF16toUTF8(aString, aKey);
}
static inline void KeyAppendString(const nsACString& aString,
nsACString& aKey) {
KeyAppendSep(aKey);
// Could escape separator here if collisions happen. > is not a legal char
// for a name or type attribute, so we should be safe avoiding that extra
// work.
aKey.Append(aString);
}
static inline void KeyAppendInt(int32_t aInt, nsACString& aKey) {
KeyAppendSep(aKey);
aKey.AppendInt(aInt);
}
static inline bool IsAutocompleteOff(const nsIContent* aContent) {
return aContent->IsElement() &&
aContent->AsElement()->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::autocomplete, u"off"_ns,
eIgnoreCase);
}
/*static*/
void nsContentUtils::GenerateStateKey(nsIContent* aContent, Document* aDocument,
nsACString& aKey) {
MOZ_ASSERT(aContent);
aKey.Truncate();
uint32_t partID = aDocument ? aDocument->GetPartID() : 0;
// Don't capture state for anonymous content
if (aContent->IsInNativeAnonymousSubtree()) {
return;
}
if (IsAutocompleteOff(aContent)) {
return;
}
RefPtr<Document> doc = aContent->GetUncomposedDoc();
KeyAppendInt(partID, aKey); // first append a partID
bool generatedUniqueKey = false;
if (doc && doc->IsHTMLOrXHTML()) {
nsHTMLDocument* htmlDoc = doc->AsHTMLDocument();
// If we have a form control and can calculate form information, use that
// as the key - it is more reliable than just recording position in the
// DOM.
// XXXbz Is it, really? We have bugs on this, I think...
// Important to have a unique key, and tag/type/name may not be.
//
// The format of the key depends on whether the control has a form,
// and whether the element was parser inserted:
//
// [Has Form, Parser Inserted]:
// fp>type>FormNum>IndOfControlInForm>FormName>name
//
// [No Form, Parser Inserted]:
// dp>type>ControlNum>name
//
// [Has Form, Not Parser Inserted]:
// fn>type>IndOfFormInDoc>IndOfControlInForm>FormName>name
//
// [No Form, Not Parser Inserted]:
// dn>type>IndOfControlInDoc>name
//
// XXX We don't need to use index if name is there
// XXXbz We don't? Why not? I don't follow.
//
nsCOMPtr<nsIFormControl> control(do_QueryInterface(aContent));
if (control) {
// Get the control number if this was a parser inserted element from the
// network.
int32_t controlNumber =
control->GetParserInsertedControlNumberForStateKey();
bool parserInserted = controlNumber != -1;
RefPtr<nsContentList> htmlForms;
RefPtr<nsContentList> htmlFormControls;
if (!parserInserted) {
// Getting these lists is expensive, as we need to keep them up to date
// as the document loads, so we avoid it if we don't need them.
htmlDoc->GetFormsAndFormControls(getter_AddRefs(htmlForms),
getter_AddRefs(htmlFormControls));
}
// Append the control type
KeyAppendInt(int32_t(control->ControlType()), aKey);
// If in a form, add form name / index of form / index in form
HTMLFormElement* formElement = control->GetForm();
if (formElement) {
if (IsAutocompleteOff(formElement)) {
aKey.Truncate();
return;
}
// Append the form number, if this is a parser inserted control, or
// the index of the form in the document otherwise.
bool appendedForm = false;
if (parserInserted) {
MOZ_ASSERT(formElement->GetFormNumberForStateKey() != -1,
"when generating a state key for a parser inserted form "
"control we should have a parser inserted <form> element");
KeyAppendString("fp"_ns, aKey);
KeyAppendInt(formElement->GetFormNumberForStateKey(), aKey);
appendedForm = true;
} else {
KeyAppendString("fn"_ns, aKey);
int32_t index = htmlForms->IndexOf(formElement, false);
if (index <= -1) {
//
// XXX HACK this uses some state that was dumped into the document
// specifically to fix bug 138892. What we are trying to do is
// *guess* which form this control's state is found in, with the
// highly likely guess that the highest form parsed so far is the
// one. This code should not be on trunk, only branch.
//
index = htmlDoc->GetNumFormsSynchronous() - 1;
}
if (index > -1) {
KeyAppendInt(index, aKey);
appendedForm = true;
}
}
if (appendedForm) {
// Append the index of the control in the form
int32_t index = formElement->IndexOfContent(aContent);
if (index > -1) {
KeyAppendInt(index, aKey);
generatedUniqueKey = true;
}
}
// Append the form name
nsAutoString formName;
formElement->GetAttr(kNameSpaceID_None, nsGkAtoms::name, formName);
KeyAppendString(formName, aKey);
} else {
// Not in a form. Append the control number, if this is a parser
// inserted control, or the index of the control in the document
// otherwise.
if (parserInserted) {
KeyAppendString("dp"_ns, aKey);
KeyAppendInt(control->GetParserInsertedControlNumberForStateKey(),
aKey);
generatedUniqueKey = true;
} else {
KeyAppendString("dn"_ns, aKey);
int32_t index = htmlFormControls->IndexOf(aContent, true);
if (index > -1) {
KeyAppendInt(index, aKey);
generatedUniqueKey = true;
}
}
// Append the control name
nsAutoString name;
aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::name,
name);
KeyAppendString(name, aKey);
}
}
}
if (!generatedUniqueKey) {
// Either we didn't have a form control or we aren't in an HTML document so
// we can't figure out form info. Append the tag name if it's an element
// to avoid restoring state for one type of element on another type.
if (aContent->IsElement()) {
KeyAppendString(nsDependentAtomString(aContent->NodeInfo()->NameAtom()),
aKey);
} else {
// Append a character that is not "d" or "f" to disambiguate from
// the case when we were a form control in an HTML document.
KeyAppendString("o"_ns, aKey);
}
// Now start at aContent and append the indices of it and all its ancestors
// in their containers. That should at least pin down its position in the
// DOM...
nsINode* parent = aContent->GetParentNode();
nsINode* content = aContent;
while (parent) {
KeyAppendInt(parent->ComputeIndexOf(content), aKey);
content = parent;
parent = content->GetParentNode();
}
}
}
// static
nsIPrincipal* nsContentUtils::SubjectPrincipal(JSContext* aCx) {
MOZ_ASSERT(NS_IsMainThread());
// As opposed to SubjectPrincipal(), we do in fact assume that
// we're in a realm here; anyone who calls this function in
// situations where that's not the case is doing it wrong.
JS::Realm* realm = js::GetContextRealm(aCx);
MOZ_ASSERT(realm);
JSPrincipals* principals = JS::GetRealmPrincipals(realm);
return nsJSPrincipals::get(principals);
}
// static
nsIPrincipal* nsContentUtils::SubjectPrincipal() {
MOZ_ASSERT(IsInitialized());
MOZ_ASSERT(NS_IsMainThread());
JSContext* cx = GetCurrentJSContext();
if (!cx) {
MOZ_CRASH(
"Accessing the Subject Principal without an AutoJSAPI on the stack is "
"forbidden");
}
JS::Realm* realm = js::GetContextRealm(cx);
// When an AutoJSAPI is instantiated, we are in a null realm until the
// first JSAutoRealm, which is kind of a purgatory as far as permissions
// go. It would be nice to just hard-abort if somebody does a security check
// in this purgatory zone, but that would be too fragile, since it could be
// triggered by random IsCallerChrome() checks 20-levels deep.
//
// So we want to return _something_ here - and definitely not the System
// Principal, since that would make an AutoJSAPI a very dangerous thing to
// instantiate.
//
// The natural thing to return is a null principal. Ideally, we'd return a
// different null principal each time, to avoid any unexpected interactions
// when the principal accidentally gets inherited somewhere. But
// SubjectPrincipal doesn't return strong references, so there's no way to
// sanely manage the lifetime of multiple null principals.
//
// So we use a singleton null principal. To avoid it being accidentally
// inherited and becoming a "real" subject or object principal, we do a
// release-mode assert during realm creation against using this principal on
// an actual global.
if (!realm) {
return sNullSubjectPrincipal;
}
return SubjectPrincipal(cx);
}
// static
nsIPrincipal* nsContentUtils::ObjectPrincipal(JSObject* aObj) {
MOZ_ASSERT(NS_IsMainThread());
#ifdef DEBUG
JS::AssertObjectBelongsToCurrentThread(aObj);
#endif
MOZ_DIAGNOSTIC_ASSERT(!js::IsCrossCompartmentWrapper(aObj));
JS::Realm* realm = js::GetNonCCWObjectRealm(aObj);
JSPrincipals* principals = JS::GetRealmPrincipals(realm);
return nsJSPrincipals::get(principals);
}
// static
nsresult nsContentUtils::NewURIWithDocumentCharset(nsIURI** aResult,
const nsAString& aSpec,
Document* aDocument,
nsIURI* aBaseURI) {
if (aDocument) {
return NS_NewURI(aResult, aSpec, aDocument->GetDocumentCharacterSet(),
aBaseURI);
}
return NS_NewURI(aResult, aSpec, nullptr, aBaseURI);
}
// static
bool nsContentUtils::IsNameWithDash(nsAtom* aName) {
// A valid custom element name is a sequence of characters name which
// must match the PotentialCustomElementName production:
// PotentialCustomElementName ::= [a-z] (PCENChar)* '-' (PCENChar)*
const char16_t* name = aName->GetUTF16String();
uint32_t len = aName->GetLength();
bool hasDash = false;
if (!len || name[0] < 'a' || name[0] > 'z') {
return false;
}
uint32_t i = 1;
while (i < len) {
if (i + 1 < len && NS_IS_SURROGATE_PAIR(name[i], name[i + 1])) {
// Merged two 16-bit surrogate pairs into code point.
char32_t code = SURROGATE_TO_UCS4(name[i], name[i + 1]);
if (code < 0x10000 || code > 0xEFFFF) {
return false;
}
i += 2;
} else {
if (name[i] == '-') {
hasDash = true;
}
if (name[i] != '-' && name[i] != '.' && name[i] != '_' &&
name[i] != 0xB7 && (name[i] < '0' || name[i] > '9') &&
(name[i] < 'a' || name[i] > 'z') &&
(name[i] < 0xC0 || name[i] > 0xD6) &&
(name[i] < 0xF8 || name[i] > 0x37D) &&
(name[i] < 0x37F || name[i] > 0x1FFF) &&
(name[i] < 0x200C || name[i] > 0x200D) &&
(name[i] < 0x203F || name[i] > 0x2040) &&
(name[i] < 0x2070 || name[i] > 0x218F) &&
(name[i] < 0x2C00 || name[i] > 0x2FEF) &&
(name[i] < 0x3001 || name[i] > 0xD7FF) &&
(name[i] < 0xF900 || name[i] > 0xFDCF) &&
(name[i] < 0xFDF0 || name[i] > 0xFFFD)) {
return false;
}
i++;
}
}
return hasDash;
}
// static
bool nsContentUtils::IsCustomElementName(nsAtom* aName, uint32_t aNameSpaceID) {
// Allow non-dashed names in XUL for XBL to Custom Element migrations.
if (aNameSpaceID == kNameSpaceID_XUL) {
return true;
}
bool hasDash = IsNameWithDash(aName);
if (!hasDash) {
return false;
}
// The custom element name must not be one of the following values:
// annotation-xml
// color-profile
// font-face
// font-face-src
// font-face-uri
// font-face-format
// font-face-name
// missing-glyph
return aName != nsGkAtoms::annotation_xml_ &&
aName != nsGkAtoms::colorProfile && aName != nsGkAtoms::font_face &&
aName != nsGkAtoms::font_face_src &&
aName != nsGkAtoms::font_face_uri &&
aName != nsGkAtoms::font_face_format &&
aName != nsGkAtoms::font_face_name && aName != nsGkAtoms::missingGlyph;
}
// static
nsresult nsContentUtils::CheckQName(const nsAString& aQualifiedName,
bool aNamespaceAware,
const char16_t** aColon) {
const char* colon = nullptr;
const char16_t* begin = aQualifiedName.BeginReading();
const char16_t* end = aQualifiedName.EndReading();
int result = MOZ_XMLCheckQName(reinterpret_cast<const char*>(begin),
reinterpret_cast<const char*>(end),
aNamespaceAware, &colon);
if (!result) {
if (aColon) {
*aColon = reinterpret_cast<const char16_t*>(colon);
}
return NS_OK;
}
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
// static
nsresult nsContentUtils::SplitQName(const nsIContent* aNamespaceResolver,
const nsString& aQName, int32_t* aNamespace,
nsAtom** aLocalName) {
const char16_t* colon;
nsresult rv = nsContentUtils::CheckQName(aQName, true, &colon);
NS_ENSURE_SUCCESS(rv, rv);
if (colon) {
const char16_t* end;
aQName.EndReading(end);
nsAutoString nameSpace;
rv = aNamespaceResolver->LookupNamespaceURIInternal(
Substring(aQName.get(), colon), nameSpace);
NS_ENSURE_SUCCESS(rv, rv);
*aNamespace = nsNameSpaceManager::GetInstance()->GetNameSpaceID(
nameSpace, nsContentUtils::IsChromeDoc(aNamespaceResolver->OwnerDoc()));
if (*aNamespace == kNameSpaceID_Unknown) return NS_ERROR_FAILURE;
*aLocalName = NS_AtomizeMainThread(Substring(colon + 1, end)).take();
} else {
*aNamespace = kNameSpaceID_None;
*aLocalName = NS_AtomizeMainThread(aQName).take();
}
NS_ENSURE_TRUE(aLocalName, NS_ERROR_OUT_OF_MEMORY);
return NS_OK;
}
// static
nsresult nsContentUtils::GetNodeInfoFromQName(
const nsAString& aNamespaceURI, const nsAString& aQualifiedName,
nsNodeInfoManager* aNodeInfoManager, uint16_t aNodeType,
mozilla::dom::NodeInfo** aNodeInfo) {
const nsString& qName = PromiseFlatString(aQualifiedName);
const char16_t* colon;
nsresult rv = nsContentUtils::CheckQName(qName, true, &colon);
NS_ENSURE_SUCCESS(rv, rv);
int32_t nsID;
nsNameSpaceManager::GetInstance()->RegisterNameSpace(aNamespaceURI, nsID);
if (colon) {
const char16_t* end;
qName.EndReading(end);
RefPtr<nsAtom> prefix = NS_AtomizeMainThread(Substring(qName.get(), colon));
rv = aNodeInfoManager->GetNodeInfo(Substring(colon + 1, end), prefix, nsID,
aNodeType, aNodeInfo);
} else {
rv = aNodeInfoManager->GetNodeInfo(aQualifiedName, nullptr, nsID, aNodeType,
aNodeInfo);
}
NS_ENSURE_SUCCESS(rv, rv);
return nsContentUtils::IsValidNodeName((*aNodeInfo)->NameAtom(),
(*aNodeInfo)->GetPrefixAtom(),
(*aNodeInfo)->NamespaceID())
? NS_OK
: NS_ERROR_DOM_NAMESPACE_ERR;
}
// static
void nsContentUtils::SplitExpatName(const char16_t* aExpatName,
nsAtom** aPrefix, nsAtom** aLocalName,
int32_t* aNameSpaceID) {
/**
* Expat can send the following:
* localName
* namespaceURI<separator>localName
* namespaceURI<separator>localName<separator>prefix
*
* and we use 0xFFFF for the <separator>.
*
*/
const char16_t* uriEnd = nullptr;
const char16_t* nameEnd = nullptr;
const char16_t* pos;
for (pos = aExpatName; *pos; ++pos) {
if (*pos == 0xFFFF) {
if (uriEnd) {
nameEnd = pos;
} else {
uriEnd = pos;
}
}
}
const char16_t* nameStart;
if (uriEnd) {
nsNameSpaceManager::GetInstance()->RegisterNameSpace(
nsDependentSubstring(aExpatName, uriEnd), *aNameSpaceID);
nameStart = (uriEnd + 1);
if (nameEnd) {
const char16_t* prefixStart = nameEnd + 1;
*aPrefix = NS_AtomizeMainThread(Substring(prefixStart, pos)).take();
} else {
nameEnd = pos;
*aPrefix = nullptr;
}
} else {
*aNameSpaceID = kNameSpaceID_None;
nameStart = aExpatName;
nameEnd = pos;
*aPrefix = nullptr;
}
*aLocalName = NS_AtomizeMainThread(Substring(nameStart, nameEnd)).take();
}
// static
PresShell* nsContentUtils::GetPresShellForContent(const nsIContent* aContent) {
Document* doc = aContent->GetComposedDoc();
if (!doc) {
return nullptr;
}
return doc->GetPresShell();
}
// static
nsPresContext* nsContentUtils::GetContextForContent(
const nsIContent* aContent) {
PresShell* presShell = GetPresShellForContent(aContent);
if (!presShell) {
return nullptr;
}
return presShell->GetPresContext();
}
// static
bool nsContentUtils::CanLoadImage(nsIURI* aURI, nsINode* aNode,
Document* aLoadingDocument,
nsIPrincipal* aLoadingPrincipal) {
MOZ_ASSERT(aURI, "Must have a URI");
MOZ_ASSERT(aLoadingDocument, "Must have a document");
MOZ_ASSERT(aLoadingPrincipal, "Must have a loading principal");
nsresult rv;
auto appType = nsIDocShell::APP_TYPE_UNKNOWN;
{
nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem =
aLoadingDocument->GetDocShell();
if (docShellTreeItem) {
nsCOMPtr<nsIDocShellTreeItem> root;
docShellTreeItem->GetInProcessRootTreeItem(getter_AddRefs(root));
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(root));
if (docShell) {
appType = docShell->GetAppType();
}
}
}
if (appType != nsIDocShell::APP_TYPE_EDITOR) {
// Editor apps get special treatment here, editors can load images
// from anywhere. This allows editor to insert images from file://
// into documents that are being edited.
rv = sSecurityManager->CheckLoadURIWithPrincipal(
aLoadingPrincipal, aURI, nsIScriptSecurityManager::ALLOW_CHROME,
aLoadingDocument->InnerWindowID());
if (NS_FAILED(rv)) {
return false;
}
}
nsCOMPtr<nsILoadInfo> secCheckLoadInfo = new mozilla::net::LoadInfo(
aLoadingPrincipal,
aLoadingPrincipal, // triggering principal
aNode, nsILoadInfo::SEC_ONLY_FOR_EXPLICIT_CONTENTSEC_CHECK,
nsIContentPolicy::TYPE_INTERNAL_IMAGE);
int16_t decision = nsIContentPolicy::ACCEPT;
rv = NS_CheckContentLoadPolicy(aURI, secCheckLoadInfo,
""_ns, // mime guess
&decision, GetContentPolicy());
return NS_SUCCEEDED(rv) && NS_CP_ACCEPTED(decision);
}
// static
bool nsContentUtils::IsInPrivateBrowsing(Document* aDoc) {
if (!aDoc) {
return false;
}
nsCOMPtr<nsILoadGroup> loadGroup = aDoc->GetDocumentLoadGroup();
if (loadGroup) {
nsCOMPtr<nsIInterfaceRequestor> callbacks;
loadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (callbacks) {
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
if (loadContext) {
return loadContext->UsePrivateBrowsing();
}
}
}
nsCOMPtr<nsIChannel> channel = aDoc->GetChannel();
return channel && NS_UsePrivateBrowsing(channel);
}
// static
bool nsContentUtils::IsInPrivateBrowsing(nsILoadGroup* aLoadGroup) {
if (!aLoadGroup) {
return false;
}
bool isPrivate = false;
nsCOMPtr<nsIInterfaceRequestor> callbacks;
aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (callbacks) {
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
isPrivate = loadContext && loadContext->UsePrivateBrowsing();
}
return isPrivate;
}
// FIXME(emilio): This is (effectively) almost but not quite the same as
// Document::ShouldLoadImages(), which one is right?
bool nsContentUtils::DocumentInactiveForImageLoads(Document* aDocument) {
if (!aDocument) {
return false;
}
if (IsChromeDoc(aDocument) || aDocument->IsResourceDoc() ||
aDocument->IsStaticDocument()) {
return false;
}
nsCOMPtr<nsPIDOMWindowInner> win =
do_QueryInterface(aDocument->GetScopeObject());
return !win || !win->GetDocShell();
}
imgLoader* nsContentUtils::GetImgLoaderForDocument(Document* aDoc) {
NS_ENSURE_TRUE(!DocumentInactiveForImageLoads(aDoc), nullptr);
if (!aDoc) {
return imgLoader::NormalLoader();
}
bool isPrivate = IsInPrivateBrowsing(aDoc);
return isPrivate ? imgLoader::PrivateBrowsingLoader()
: imgLoader::NormalLoader();
}
// static
imgLoader* nsContentUtils::GetImgLoaderForChannel(nsIChannel* aChannel,
Document* aContext) {
NS_ENSURE_TRUE(!DocumentInactiveForImageLoads(aContext), nullptr);
if (!aChannel) {
return imgLoader::NormalLoader();
}
nsCOMPtr<nsILoadContext> context;
NS_QueryNotificationCallbacks(aChannel, context);
return context && context->UsePrivateBrowsing()
? imgLoader::PrivateBrowsingLoader()
: imgLoader::NormalLoader();
}
// static
bool nsContentUtils::IsImageInCache(nsIURI* aURI, Document* aDocument) {
imgILoader* loader = GetImgLoaderForDocument(aDocument);
nsCOMPtr<imgICache> cache = do_QueryInterface(loader);
// If something unexpected happened we return false, otherwise if props
// is set, the image is cached and we return true
nsCOMPtr<nsIProperties> props;
nsresult rv =
cache->FindEntryProperties(aURI, aDocument, getter_AddRefs(props));
return (NS_SUCCEEDED(rv) && props);
}
// static
int32_t nsContentUtils::CORSModeToLoadImageFlags(mozilla::CORSMode aMode) {
switch (aMode) {
case CORS_ANONYMOUS:
return imgILoader::LOAD_CORS_ANONYMOUS;
case CORS_USE_CREDENTIALS:
return imgILoader::LOAD_CORS_USE_CREDENTIALS;
default:
return 0;
}
}
// static
nsresult nsContentUtils::LoadImage(
nsIURI* aURI, nsINode* aContext, Document* aLoadingDocument,
nsIPrincipal* aLoadingPrincipal, uint64_t aRequestContextID,
nsIReferrerInfo* aReferrerInfo, imgINotificationObserver* aObserver,
int32_t aLoadFlags, const nsAString& initiatorType,
imgRequestProxy** aRequest, nsContentPolicyType aContentPolicyType,
bool aUseUrgentStartForChannel, bool aLinkPreload) {
MOZ_ASSERT(aURI, "Must have a URI");
MOZ_ASSERT(aContext, "Must have a context");
MOZ_ASSERT(aLoadingDocument, "Must have a document");
MOZ_ASSERT(aLoadingPrincipal, "Must have a principal");
MOZ_ASSERT(aRequest, "Null out param");
imgLoader* imgLoader = GetImgLoaderForDocument(aLoadingDocument);
if (!imgLoader) {
// nothing we can do here
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsILoadGroup> loadGroup = aLoadingDocument->GetDocumentLoadGroup();
nsIURI* documentURI = aLoadingDocument->GetDocumentURI();
NS_ASSERTION(loadGroup || IsFontTableURI(documentURI),
"Could not get loadgroup; onload may fire too early");
// XXXbz using "documentURI" for the initialDocumentURI is not quite
// right, but the best we can do here...
return imgLoader->LoadImage(aURI, /* uri to load */
documentURI, /* initialDocumentURI */
aReferrerInfo, /* referrerInfo */
aLoadingPrincipal, /* loading principal */
aRequestContextID, /* request context ID */
loadGroup, /* loadgroup */
aObserver, /* imgINotificationObserver */
aContext, /* loading context */
aLoadingDocument, /* uniquification key */
aLoadFlags, /* load flags */
nullptr, /* cache key */
aContentPolicyType, /* content policy type */
initiatorType, /* the load initiator */
aUseUrgentStartForChannel, /* urgent-start flag */
aLinkPreload, /* <link preload> initiator */
aRequest);
}
// static
already_AddRefed<imgIContainer> nsContentUtils::GetImageFromContent(
nsIImageLoadingContent* aContent, imgIRequest** aRequest) {
if (aRequest) {
*aRequest = nullptr;
}
NS_ENSURE_TRUE(aContent, nullptr);
nsCOMPtr<imgIRequest> imgRequest;
aContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(imgRequest));
if (!imgRequest) {
return nullptr;
}
nsCOMPtr<imgIContainer> imgContainer;
imgRequest->GetImage(getter_AddRefs(imgContainer));
if (!imgContainer) {
return nullptr;
}
if (aRequest) {
// If the consumer wants the request, verify it has actually loaded
// successfully.
uint32_t imgStatus;
imgRequest->GetImageStatus(&imgStatus);
if (imgStatus & imgIRequest::STATUS_FRAME_COMPLETE &&
!(imgStatus & imgIRequest::STATUS_ERROR)) {
imgRequest.swap(*aRequest);
}
}
return imgContainer.forget();
}
// static
bool nsContentUtils::ContentIsDraggable(nsIContent* aContent) {
MOZ_ASSERT(aContent);
if (auto htmlElement = nsGenericHTMLElement::FromNode(aContent)) {
if (htmlElement->Draggable()) {
return true;
}
if (htmlElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::draggable,
nsGkAtoms::_false, eIgnoreCase)) {
return false;
}
}
if (aContent->IsSVGElement()) {
return false;
}
// special handling for content area image and link dragging
return IsDraggableImage(aContent) || IsDraggableLink(aContent);
}
// static
bool nsContentUtils::IsDraggableImage(nsIContent* aContent) {
MOZ_ASSERT(aContent, "Must have content node to test");
nsCOMPtr<nsIImageLoadingContent> imageContent(do_QueryInterface(aContent));
if (!imageContent) {
return false;
}
nsCOMPtr<imgIRequest> imgRequest;
imageContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(imgRequest));
// XXXbz It may be draggable even if the request resulted in an error. Why?
// Not sure; that's what the old nsContentAreaDragDrop/nsFrame code did.
return imgRequest != nullptr;
}
// static
bool nsContentUtils::IsDraggableLink(const nsIContent* aContent) {
nsCOMPtr<nsIURI> absURI;
return aContent->IsLink(getter_AddRefs(absURI));
}
// static
nsresult nsContentUtils::QNameChanged(mozilla::dom::NodeInfo* aNodeInfo,
nsAtom* aName,
mozilla::dom::NodeInfo** aResult) {
nsNodeInfoManager* niMgr = aNodeInfo->NodeInfoManager();
*aResult = niMgr
->GetNodeInfo(aName, nullptr, aNodeInfo->NamespaceID(),
aNodeInfo->NodeType(), aNodeInfo->GetExtraName())
.take();
return NS_OK;
}
static bool TestSitePerm(nsIPrincipal* aPrincipal, const nsACString& aType,
uint32_t aPerm, bool aExactHostMatch) {
if (!aPrincipal) {
// We always deny (i.e. don't allow) the permission if we don't have a
// principal.
return aPerm != nsIPermissionManager::ALLOW_ACTION;
}
nsCOMPtr<nsIPermissionManager> permMgr =
components::PermissionManager::Service();
NS_ENSURE_TRUE(permMgr, false);
uint32_t perm;
nsresult rv;
if (aExactHostMatch) {
rv = permMgr->TestExactPermissionFromPrincipal(aPrincipal, aType, &perm);
} else {
rv = permMgr->TestPermissionFromPrincipal(aPrincipal, aType, &perm);
}
NS_ENSURE_SUCCESS(rv, false);
return perm == aPerm;
}
bool nsContentUtils::IsSitePermAllow(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::ALLOW_ACTION,
false);
}
bool nsContentUtils::IsSitePermDeny(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::DENY_ACTION,
false);
}
bool nsContentUtils::IsExactSitePermAllow(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::ALLOW_ACTION,
true);
}
bool nsContentUtils::IsExactSitePermDeny(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::DENY_ACTION,
true);
}
static const char* gEventNames[] = {"event"};
static const char* gSVGEventNames[] = {"evt"};
// for b/w compat, the first name to onerror is still 'event', even though it
// is actually the error message
static const char* gOnErrorNames[] = {"event", "source", "lineno", "colno",
"error"};
// static
void nsContentUtils::GetEventArgNames(int32_t aNameSpaceID, nsAtom* aEventName,
bool aIsForWindow, uint32_t* aArgCount,
const char*** aArgArray) {
#define SET_EVENT_ARG_NAMES(names) \
*aArgCount = sizeof(names) / sizeof(names[0]); \
*aArgArray = names;
// JSEventHandler is what does the arg magic for onerror, and it does
// not seem to take the namespace into account. So we let onerror in all
// namespaces get the 3 arg names.
if (aEventName == nsGkAtoms::onerror && aIsForWindow) {
SET_EVENT_ARG_NAMES(gOnErrorNames);
} else if (aNameSpaceID == kNameSpaceID_SVG) {
SET_EVENT_ARG_NAMES(gSVGEventNames);
} else {
SET_EVENT_ARG_NAMES(gEventNames);
}
}
// Note: The list of content bundles in nsStringBundle.cpp should be updated
// whenever entries are added or removed from this list.
static const char* gPropertiesFiles[nsContentUtils::PropertiesFile_COUNT] = {
// Must line up with the enum values in |PropertiesFile| enum.
"chrome://global/locale/css.properties",
"chrome://global/locale/xul.properties",
"chrome://global/locale/layout_errors.properties",
"chrome://global/locale/layout/HtmlForm.properties",
"chrome://global/locale/printing.properties",
"chrome://global/locale/dom/dom.properties",
"chrome://global/locale/layout/htmlparser.properties",
"chrome://global/locale/svg/svg.properties",
"chrome://branding/locale/brand.properties",
"chrome://global/locale/commonDialogs.properties",
"chrome://global/locale/mathml/mathml.properties",
"chrome://global/locale/security/security.properties",
"chrome://necko/locale/necko.properties",
"resource://gre/res/locale/layout/HtmlForm.properties",
"resource://gre/res/locale/dom/dom.properties"};
/* static */
nsresult nsContentUtils::EnsureStringBundle(PropertiesFile aFile) {
if (!sStringBundles[aFile]) {
if (!sStringBundleService) {
nsresult rv =
CallGetService(NS_STRINGBUNDLE_CONTRACTID, &sStringBundleService);
NS_ENSURE_SUCCESS(rv, rv);
}
nsIStringBundle* bundle;
nsresult rv =
sStringBundleService->CreateBundle(gPropertiesFiles[aFile], &bundle);
NS_ENSURE_SUCCESS(rv, rv);
sStringBundles[aFile] = bundle; // transfer ownership
}
return NS_OK;
}
/* static */
void nsContentUtils::AsyncPrecreateStringBundles() {
// We only ever want to pre-create bundles in the parent process.
//
// All nsContentUtils bundles are shared between the parent and child
// precesses, and the shared memory regions that back them *must* be created
// in the parent, and then sent to all children.
//
// If we attempt to create a bundle in the child before its memory region is
// available, we need to create a temporary non-shared bundle, and later
// replace that with the shared memory copy. So attempting to pre-load in the
// child is wasteful and unnecessary.
MOZ_ASSERT(XRE_IsParentProcess());
for (uint32_t bundleIndex = 0; bundleIndex < PropertiesFile_COUNT;
++bundleIndex) {
nsresult rv = NS_DispatchToCurrentThreadQueue(
NS_NewRunnableFunction("AsyncPrecreateStringBundles",
[bundleIndex]() {
PropertiesFile file =
static_cast<PropertiesFile>(bundleIndex);
EnsureStringBundle(file);
nsIStringBundle* bundle = sStringBundles[file];
bundle->AsyncPreload();
}),
EventQueuePriority::Idle);
Unused << NS_WARN_IF(NS_FAILED(rv));
}
}
/* static */
bool nsContentUtils::SpoofLocaleEnglish() {
// 0 - will prompt
// 1 - don't spoof
// 2 - spoof
return StaticPrefs::privacy_spoof_english() == 2;
}
static nsContentUtils::PropertiesFile GetMaybeSpoofedPropertiesFile(
nsContentUtils::PropertiesFile aFile, const char* aKey,
Document* aDocument) {
// When we spoof English, use en-US properties in strings that are accessible
// by content.
bool spoofLocale = nsContentUtils::SpoofLocaleEnglish() &&
(!aDocument || !aDocument->AllowsL10n());
if (spoofLocale) {
switch (aFile) {
case nsContentUtils::eFORMS_PROPERTIES:
return nsContentUtils::eFORMS_PROPERTIES_en_US;
case nsContentUtils::eDOM_PROPERTIES:
return nsContentUtils::eDOM_PROPERTIES_en_US;
default:
break;
}
}
return aFile;
}
/* static */
nsresult nsContentUtils::GetMaybeLocalizedString(PropertiesFile aFile,
const char* aKey,
Document* aDocument,
nsAString& aResult) {
return GetLocalizedString(
GetMaybeSpoofedPropertiesFile(aFile, aKey, aDocument), aKey, aResult);
}
/* static */
nsresult nsContentUtils::GetLocalizedString(PropertiesFile aFile,
const char* aKey,
nsAString& aResult) {
nsresult rv = EnsureStringBundle(aFile);
NS_ENSURE_SUCCESS(rv, rv);
nsIStringBundle* bundle = sStringBundles[aFile];
return bundle->GetStringFromName(aKey, aResult);
}
/* static */
nsresult nsContentUtils::FormatMaybeLocalizedString(
PropertiesFile aFile, const char* aKey, Document* aDocument,
const nsTArray<nsString>& aParams, nsAString& aResult) {
return FormatLocalizedString(
GetMaybeSpoofedPropertiesFile(aFile, aKey, aDocument), aKey, aParams,
aResult);
}
/* static */
nsresult nsContentUtils::FormatLocalizedString(
PropertiesFile aFile, const char* aKey, const nsTArray<nsString>& aParams,
nsAString& aResult) {
nsresult rv = EnsureStringBundle(aFile);
NS_ENSURE_SUCCESS(rv, rv);
nsIStringBundle* bundle = sStringBundles[aFile];
if (aParams.IsEmpty()) {
return bundle->GetStringFromName(aKey, aResult);
}
return bundle->FormatStringFromName(aKey, aParams, aResult);
}
/* static */
void nsContentUtils::LogSimpleConsoleError(const nsAString& aErrorText,
const char* aCategory,
bool aFromPrivateWindow,
bool aFromChromeContext,
uint32_t aErrorFlags) {
nsCOMPtr<nsIScriptError> scriptError =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID);
if (scriptError) {
nsCOMPtr<nsIConsoleService> console =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (console && NS_SUCCEEDED(scriptError->Init(
aErrorText, u""_ns, u""_ns, 0, 0, aErrorFlags, aCategory,
aFromPrivateWindow, aFromChromeContext))) {
console->LogMessage(scriptError);
}
}
}
/* static */
nsresult nsContentUtils::ReportToConsole(
uint32_t aErrorFlags, const nsACString& aCategory,
const Document* aDocument, PropertiesFile aFile, const char* aMessageName,
const nsTArray<nsString>& aParams, nsIURI* aURI,
const nsString& aSourceLine, uint32_t aLineNumber, uint32_t aColumnNumber) {
nsresult rv;
nsAutoString errorText;
if (!aParams.IsEmpty()) {
rv = FormatLocalizedString(aFile, aMessageName, aParams, errorText);
} else {
rv = GetLocalizedString(aFile, aMessageName, errorText);
}
NS_ENSURE_SUCCESS(rv, rv);
return ReportToConsoleNonLocalized(errorText, aErrorFlags, aCategory,
aDocument, aURI, aSourceLine, aLineNumber,
aColumnNumber);
}
/* static */
void nsContentUtils::ReportEmptyGetElementByIdArg(const Document* aDoc) {
ReportToConsole(nsIScriptError::warningFlag, "DOM"_ns, aDoc,
nsContentUtils::eDOM_PROPERTIES, "EmptyGetElementByIdParam");
}
/* static */
nsresult nsContentUtils::ReportToConsoleNonLocalized(
const nsAString& aErrorText, uint32_t aErrorFlags,
const nsACString& aCategory, const Document* aDocument, nsIURI* aURI,
const nsString& aSourceLine, uint32_t aLineNumber, uint32_t aColumnNumber,
MissingErrorLocationMode aLocationMode) {
uint64_t innerWindowID = 0;
if (aDocument) {
if (!aURI) {
aURI = aDocument->GetDocumentURI();
}
innerWindowID = aDocument->InnerWindowID();
}
return ReportToConsoleByWindowID(aErrorText, aErrorFlags, aCategory,
innerWindowID, aURI, aSourceLine,
aLineNumber, aColumnNumber, aLocationMode);
}
/* static */
nsresult nsContentUtils::ReportToConsoleByWindowID(
const nsAString& aErrorText, uint32_t aErrorFlags,
const nsACString& aCategory, uint64_t aInnerWindowID, nsIURI* aURI,
const nsString& aSourceLine, uint32_t aLineNumber, uint32_t aColumnNumber,
MissingErrorLocationMode aLocationMode) {
nsresult rv;
if (!sConsoleService) { // only need to bother null-checking here
rv = CallGetService(NS_CONSOLESERVICE_CONTRACTID, &sConsoleService);
NS_ENSURE_SUCCESS(rv, rv);
}
nsAutoString spec;
if (!aLineNumber && aLocationMode == eUSE_CALLING_LOCATION) {
JSContext* cx = GetCurrentJSContext();
if (cx) {
nsJSUtils::GetCallingLocation(cx, spec, &aLineNumber, &aColumnNumber);
}
}
nsCOMPtr<nsIScriptError> errorObject =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
if (!spec.IsEmpty()) {
rv = errorObject->InitWithWindowID(aErrorText,
spec, // file name
aSourceLine, aLineNumber, aColumnNumber,
aErrorFlags, aCategory, aInnerWindowID);
} else {
rv = errorObject->InitWithSourceURI(aErrorText, aURI, aSourceLine,
aLineNumber, aColumnNumber, aErrorFlags,
aCategory, aInnerWindowID);
}
NS_ENSURE_SUCCESS(rv, rv);
return sConsoleService->LogMessage(errorObject);
}
void nsContentUtils::LogMessageToConsole(const char* aMsg) {
if (!sConsoleService) { // only need to bother null-checking here
CallGetService(NS_CONSOLESERVICE_CONTRACTID, &sConsoleService);
if (!sConsoleService) {
return;
}
}
sConsoleService->LogStringMessage(NS_ConvertUTF8toUTF16(aMsg).get());
}
bool nsContentUtils::IsChromeDoc(const Document* aDocument) {
return aDocument && aDocument->NodePrincipal() == sSystemPrincipal;
}
bool nsContentUtils::IsChildOfSameType(Document* aDoc) {
if (BrowsingContext* bc = aDoc->GetBrowsingContext()) {
return bc->GetParent();
}
return false;
}
bool nsContentUtils::IsPlainTextType(const nsACString& aContentType) {
// NOTE: if you add a type here, add it to the CONTENTDLF_CATEGORIES
// define in nsContentDLF.h as well.
return aContentType.EqualsLiteral(TEXT_PLAIN) ||
aContentType.EqualsLiteral(TEXT_CSS) ||
aContentType.EqualsLiteral(TEXT_CACHE_MANIFEST) ||
aContentType.EqualsLiteral(TEXT_VTT) ||
aContentType.EqualsLiteral(APPLICATION_JAVASCRIPT) ||
aContentType.EqualsLiteral(APPLICATION_XJAVASCRIPT) ||
aContentType.EqualsLiteral(TEXT_ECMASCRIPT) ||
aContentType.EqualsLiteral(APPLICATION_ECMASCRIPT) ||
aContentType.EqualsLiteral(TEXT_JAVASCRIPT) ||
aContentType.EqualsLiteral(APPLICATION_JSON) ||
aContentType.EqualsLiteral(TEXT_JSON);
}
bool nsContentUtils::IsUtf8OnlyPlainTextType(const nsACString& aContentType) {
// NOTE: This must be a subset of the list in IsPlainTextType().
return aContentType.EqualsLiteral(TEXT_CACHE_MANIFEST) ||
aContentType.EqualsLiteral(APPLICATION_JSON) ||
aContentType.EqualsLiteral(TEXT_JSON) ||
aContentType.EqualsLiteral(TEXT_VTT);
}
bool nsContentUtils::IsInChromeDocshell(const Document* aDocument) {
return aDocument && aDocument->IsInChromeDocShell();
}
// static
nsIContentPolicy* nsContentUtils::GetContentPolicy() {
if (!sTriedToGetContentPolicy) {
CallGetService(NS_CONTENTPOLICY_CONTRACTID, &sContentPolicyService);
// It's OK to not have a content policy service
sTriedToGetContentPolicy = true;
}
return sContentPolicyService;
}
// static
bool nsContentUtils::IsEventAttributeName(nsAtom* aName, int32_t aType) {
const char16_t* name = aName->GetUTF16String();
if (name[0] != 'o' || name[1] != 'n') {
return false;
}
EventNameMapping mapping;
return (sAtomEventTable->Get(aName, &mapping) && mapping.mType & aType);
}
// static
EventMessage nsContentUtils::GetEventMessage(nsAtom* aName) {
MOZ_ASSERT(NS_IsMainThread(), "sAtomEventTable is not threadsafe");
if (aName) {
EventNameMapping mapping;
if (sAtomEventTable->Get(aName, &mapping)) {
return mapping.mMessage;
}
}
return eUnidentifiedEvent;
}
// static
mozilla::EventClassID nsContentUtils::GetEventClassID(const nsAString& aName) {
EventNameMapping mapping;
if (sStringEventTable->Get(aName, &mapping)) return mapping.mEventClassID;
return eBasicEventClass;
}
nsAtom* nsContentUtils::GetEventMessageAndAtom(
const nsAString& aName, mozilla::EventClassID aEventClassID,
EventMessage* aEventMessage) {
MOZ_ASSERT(NS_IsMainThread(), "Our hashtables are not threadsafe");
EventNameMapping mapping;
if (sStringEventTable->Get(aName, &mapping)) {
*aEventMessage = mapping.mEventClassID == aEventClassID
? mapping.mMessage
: eUnidentifiedEvent;
return mapping.mAtom;
}
// If we have cached lots of user defined event names, clear some of them.
if (sUserDefinedEvents->Length() > 127) {
while (sUserDefinedEvents->Length() > 64) {
nsAtom* first = sUserDefinedEvents->ElementAt(0);
sStringEventTable->Remove(Substring(nsDependentAtomString(first), 2));
sUserDefinedEvents->RemoveElementAt(0);
}
}
*aEventMessage = eUnidentifiedEvent;
RefPtr<nsAtom> atom = NS_AtomizeMainThread(u"on"_ns + aName);
sUserDefinedEvents->AppendElement(atom);
mapping.mAtom = atom;
mapping.mMessage = eUnidentifiedEvent;
mapping.mType = EventNameType_None;
mapping.mEventClassID = eBasicEventClass;
// This is a slow hashtable call, but at least we cache the result for the
// following calls. Because GetEventMessageAndAtomForListener utilizes
// sStringEventTable, it needs to know in which cases sStringEventTable
// doesn't contain the information it needs so that it can use
// sAtomEventTable instead.
mapping.mMaybeSpecialSVGorSMILEvent =
GetEventMessage(atom) != eUnidentifiedEvent;
sStringEventTable->InsertOrUpdate(aName, mapping);
return mapping.mAtom;
}
// static
EventMessage nsContentUtils::GetEventMessageAndAtomForListener(
const nsAString& aName, nsAtom** aOnName) {
MOZ_ASSERT(NS_IsMainThread(), "Our hashtables are not threadsafe");
// Because of SVG/SMIL sStringEventTable contains a subset of the event names
// comparing to the sAtomEventTable. However, usually sStringEventTable
// contains the information we need, so in order to reduce hashtable
// lookups, start from it.
EventNameMapping mapping;
EventMessage msg = eUnidentifiedEvent;
RefPtr<nsAtom> atom;
if (sStringEventTable->Get(aName, &mapping)) {
if (mapping.mMaybeSpecialSVGorSMILEvent) {
// Try the atom version so that we should get the right message for
// SVG/SMIL.
atom = NS_AtomizeMainThread(u"on"_ns + aName);
msg = GetEventMessage(atom);
} else {
atom = mapping.mAtom;
msg = mapping.mMessage;
}
atom.forget(aOnName);
return msg;
}
// GetEventMessageAndAtom will cache the event type for the future usage...
GetEventMessageAndAtom(aName, eBasicEventClass, &msg);
// ...and then call this method recursively to get the message and atom from
// now updated sStringEventTable.
return GetEventMessageAndAtomForListener(aName, aOnName);
}
static nsresult GetEventAndTarget(Document* aDoc, nsISupports* aTarget,
const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable,
Composed aComposed, Trusted aTrusted,
Event** aEvent, EventTarget** aTargetOut) {
nsCOMPtr<EventTarget> target(do_QueryInterface(aTarget));
NS_ENSURE_TRUE(aDoc && target, NS_ERROR_INVALID_ARG);
ErrorResult err;
RefPtr<Event> event =
aDoc->CreateEvent(u"Events"_ns, CallerType::System, err);
if (NS_WARN_IF(err.Failed())) {
return err.StealNSResult();
}
event->InitEvent(aEventName, aCanBubble, aCancelable, aComposed);
event->SetTrusted(aTrusted == Trusted::eYes);
event->SetTarget(target);
event.forget(aEvent);
target.forget(aTargetOut);
return NS_OK;
}
// static
nsresult nsContentUtils::DispatchTrustedEvent(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, Composed aComposed,
bool* aDefaultAction) {
MOZ_ASSERT(!aEventName.EqualsLiteral("input") &&
!aEventName.EqualsLiteral("beforeinput"),
"Use DispatchInputEvent() instead");
return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
aComposed, Trusted::eYes, aDefaultAction);
}
// static
nsresult nsContentUtils::DispatchUntrustedEvent(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, bool* aDefaultAction) {
return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
Composed::eDefault, Trusted::eNo, aDefaultAction);
}
// static
nsresult nsContentUtils::DispatchEvent(Document* aDoc, nsISupports* aTarget,
const nsAString& aEventName,
CanBubble aCanBubble,
Cancelable aCancelable,
Composed aComposed, Trusted aTrusted,
bool* aDefaultAction,
ChromeOnlyDispatch aOnlyChromeDispatch) {
RefPtr<Event> event;
nsCOMPtr<EventTarget> target;
nsresult rv = GetEventAndTarget(
aDoc, aTarget, aEventName, aCanBubble, aCancelable, aComposed, aTrusted,
getter_AddRefs(event), getter_AddRefs(target));
NS_ENSURE_SUCCESS(rv, rv);
event->WidgetEventPtr()->mFlags.mOnlyChromeDispatch =
aOnlyChromeDispatch == ChromeOnlyDispatch::eYes;
ErrorResult err;
bool doDefault = target->DispatchEvent(*event, CallerType::System, err);
if (aDefaultAction) {
*aDefaultAction = doDefault;
}
return err.StealNSResult();
}
// static
nsresult nsContentUtils::DispatchEvent(Document* aDoc, nsISupports* aTarget,
WidgetEvent& aEvent,
EventMessage aEventMessage,
CanBubble aCanBubble,
Cancelable aCancelable, Trusted aTrusted,
bool* aDefaultAction,
ChromeOnlyDispatch aOnlyChromeDispatch) {
MOZ_ASSERT_IF(aOnlyChromeDispatch == ChromeOnlyDispatch::eYes,
aTrusted == Trusted::eYes);
nsCOMPtr<EventTarget> target(do_QueryInterface(aTarget));
aEvent.mTime = PR_Now();
aEvent.mSpecifiedEventType = GetEventTypeFromMessage(aEventMessage);
aEvent.SetDefaultComposed();
aEvent.SetDefaultComposedInNativeAnonymousContent();
aEvent.mFlags.mBubbles = aCanBubble == CanBubble::eYes;
aEvent.mFlags.mCancelable = aCancelable == Cancelable::eYes;
aEvent.mFlags.mOnlyChromeDispatch =
aOnlyChromeDispatch == ChromeOnlyDispatch::eYes;
aEvent.mTarget = target;
nsEventStatus status = nsEventStatus_eIgnore;
nsresult rv = EventDispatcher::DispatchDOMEvent(target, &aEvent, nullptr,
nullptr, &status);
if (aDefaultAction) {
*aDefaultAction = (status != nsEventStatus_eConsumeNoDefault);
}
return rv;
}
// static
nsresult nsContentUtils::DispatchInputEvent(Element* aEventTarget) {
return DispatchInputEvent(aEventTarget, mozilla::eEditorInput,
mozilla::EditorInputType::eUnknown, nullptr,
InputEventOptions());
}
// static
nsresult nsContentUtils::DispatchInputEvent(
Element* aEventTargetElement, EventMessage aEventMessage,
EditorInputType aEditorInputType, EditorBase* aEditorBase,
InputEventOptions&& aOptions, nsEventStatus* aEventStatus /* = nullptr */) {
MOZ_ASSERT(aEventMessage == eEditorInput ||
aEventMessage == eEditorBeforeInput);
if (NS_WARN_IF(!aEventTargetElement)) {
return NS_ERROR_INVALID_ARG;
}
// If this is called from editor, the instance should be set to aEditorBase.
// Otherwise, we need to look for an editor for aEventTargetElement.
// However, we don't need to do it for HTMLEditor since nobody shouldn't
// dispatch "beforeinput" nor "input" event for HTMLEditor except HTMLEditor
// itself.
bool useInputEvent = false;
if (aEditorBase) {
useInputEvent = true;
} else if (HTMLTextAreaElement* textAreaElement =
HTMLTextAreaElement::FromNode(aEventTargetElement)) {
aEditorBase = textAreaElement->GetTextEditorWithoutCreation();
useInputEvent = true;
} else if (HTMLInputElement* inputElement =
HTMLInputElement::FromNode(aEventTargetElement)) {
if (inputElement->IsInputEventTarget()) {
aEditorBase = inputElement->GetTextEditorWithoutCreation();
useInputEvent = true;
}
}
#ifdef DEBUG
else {
MOZ_ASSERT(!aEventTargetElement->IsTextControlElement(),
"The event target may have editor, but we've not known it yet.");
}
#endif // #ifdef DEBUG
if (!useInputEvent) {
MOZ_ASSERT(aEventMessage == eEditorInput);
MOZ_ASSERT(aEditorInputType == EditorInputType::eUnknown);
MOZ_ASSERT(!aOptions.mNeverCancelable);
// Dispatch "input" event with Event instance.
WidgetEvent widgetEvent(true, eUnidentifiedEvent);
widgetEvent.mSpecifiedEventType = nsGkAtoms::oninput;
widgetEvent.mFlags.mCancelable = false;
widgetEvent.mFlags.mComposed = true;
// Using same time as nsContentUtils::DispatchEvent() for backward
// compatibility.
widgetEvent.mTime = PR_Now();
(new AsyncEventDispatcher(aEventTargetElement, widgetEvent))
->RunDOMEventWhenSafe();
return NS_OK;
}
MOZ_ASSERT_IF(aEventMessage != eEditorBeforeInput,
!aOptions.mNeverCancelable);
MOZ_ASSERT_IF(
aEventMessage == eEditorBeforeInput && aOptions.mNeverCancelable,
aEditorInputType == EditorInputType::eInsertReplacementText);
nsCOMPtr<nsIWidget> widget;
if (aEditorBase) {
widget = aEditorBase->GetWidget();
if (NS_WARN_IF(!widget)) {
return NS_ERROR_FAILURE;
}
} else {
Document* document = aEventTargetElement->OwnerDoc();
if (NS_WARN_IF(!document)) {
return NS_ERROR_FAILURE;
}
// If we're running xpcshell tests, we fail to get presShell here.
// Even in such case, we need to dispatch "input" event without widget.
PresShell* presShell = document->GetPresShell();
if (presShell) {
nsPresContext* presContext = presShell->GetPresContext();
if (NS_WARN_IF(!presContext)) {
return NS_ERROR_FAILURE;
}
widget = presContext->GetRootWidget();
if (NS_WARN_IF(!widget)) {
return NS_ERROR_FAILURE;
}
}
}
// Dispatch "input" event with InputEvent instance.
InternalEditorInputEvent inputEvent(true, aEventMessage, widget);
inputEvent.mFlags.mCancelable =
!aOptions.mNeverCancelable && aEventMessage == eEditorBeforeInput &&
IsCancelableBeforeInputEvent(aEditorInputType);
MOZ_ASSERT(!inputEvent.mFlags.mCancelable || aEventStatus);
// Using same time as old event dispatcher in EditorBase for backward
// compatibility.
inputEvent.mTime = static_cast<uint64_t>(PR_Now() / 1000);
// If there is an editor, set isComposing to true when it has composition.
// Note that EditorBase::IsIMEComposing() may return false even when we
// need to set it to true.
// Otherwise, i.e., editor hasn't been created for the element yet,
// we should set isComposing to false since the element can never has
// composition without editor.
inputEvent.mIsComposing = aEditorBase && aEditorBase->GetComposition();
if (!aEditorBase || aEditorBase->IsTextEditor()) {
if (IsDataAvailableOnTextEditor(aEditorInputType)) {
inputEvent.mData = std::move(aOptions.mData);
MOZ_ASSERT(!inputEvent.mData.IsVoid(),
"inputEvent.mData shouldn't be void");
}
#ifdef DEBUG
else {
MOZ_ASSERT(inputEvent.mData.IsVoid(), "inputEvent.mData should be void");
}
#endif // #ifdef DEBUG
MOZ_ASSERT(
aOptions.mTargetRanges.IsEmpty(),
"Target ranges for <input> and <textarea> should always be empty");
} else {
MOZ_ASSERT(aEditorBase->IsHTMLEditor());
if (IsDataAvailableOnHTMLEditor(aEditorInputType)) {
inputEvent.mData = std::move(aOptions.mData);
MOZ_ASSERT(!inputEvent.mData.IsVoid(),
"inputEvent.mData shouldn't be void");
} else {
MOZ_ASSERT(inputEvent.mData.IsVoid(), "inputEvent.mData should be void");
if (IsDataTransferAvailableOnHTMLEditor(aEditorInputType)) {
inputEvent.mDataTransfer = std::move(aOptions.mDataTransfer);
MOZ_ASSERT(inputEvent.mDataTransfer,
"inputEvent.mDataTransfer shouldn't be nullptr");
MOZ_ASSERT(inputEvent.mDataTransfer->IsReadOnly(),
"inputEvent.mDataTransfer should be read only");
}
#ifdef DEBUG
else {
MOZ_ASSERT(!inputEvent.mDataTransfer,
"inputEvent.mDataTransfer should be nullptr");
}
#endif // #ifdef DEBUG
}
if (aEventMessage == eEditorBeforeInput &&
MayHaveTargetRangesOnHTMLEditor(aEditorInputType)) {
inputEvent.mTargetRanges = std::move(aOptions.mTargetRanges);
}
#ifdef DEBUG
else {
MOZ_ASSERT(aOptions.mTargetRanges.IsEmpty(),
"Target ranges shouldn't be set for the dispatching event");
}
#endif // #ifdef DEBUG
}
inputEvent.mInputType = aEditorInputType;
if (!IsSafeToRunScript()) {
// If we cannot dispatch an event right now, we cannot make it cancelable.
NS_ASSERTION(
!inputEvent.mFlags.mCancelable,
"Cancelable beforeinput event dispatcher should run when it's safe");
inputEvent.mFlags.mCancelable = false;
(new AsyncEventDispatcher(aEventTargetElement, inputEvent))
->RunDOMEventWhenSafe();
return NS_OK;
}
// If we're running xpcshell tests, we fail to get presShell here.
// Even in such case, we need to dispatch "input" event without widget.
RefPtr<nsPresContext> presContext =
aEventTargetElement->OwnerDoc()->GetPresContext();
nsresult rv = EventDispatcher::Dispatch(aEventTargetElement, presContext,
&inputEvent, nullptr, aEventStatus);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Dispatching `beforeinput` or `input` event failed");
return rv;
}
nsresult nsContentUtils::DispatchChromeEvent(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, bool* aDefaultAction) {
RefPtr<Event> event;
nsCOMPtr<EventTarget> target;
nsresult rv = GetEventAndTarget(
aDoc, aTarget, aEventName, aCanBubble, aCancelable, Composed::eDefault,
Trusted::eYes, getter_AddRefs(event), getter_AddRefs(target));
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(aDoc, "GetEventAndTarget lied?");
if (!aDoc->GetWindow()) return NS_ERROR_INVALID_ARG;
EventTarget* piTarget = aDoc->GetWindow()->GetParentTarget();
if (!piTarget) return NS_ERROR_INVALID_ARG;
ErrorResult err;
bool defaultActionEnabled =
piTarget->DispatchEvent(*event, CallerType::System, err);
if (aDefaultAction) {
*aDefaultAction = defaultActionEnabled;
}
return err.StealNSResult();
}
void nsContentUtils::RequestFrameFocus(Element& aFrameElement, bool aCanRaise,
CallerType aCallerType) {
RefPtr<Element> target = &aFrameElement;
bool defaultAction = true;
if (aCanRaise) {
DispatchEventOnlyToChrome(target->OwnerDoc(), target,
u"framefocusrequested"_ns, CanBubble::eYes,
Cancelable::eYes, &defaultAction);
}
if (!defaultAction) {
return;
}
RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager();
if (!fm) {
return;
}
uint32_t flags = nsIFocusManager::FLAG_NOSCROLL;
if (aCanRaise) {
flags |= nsIFocusManager::FLAG_RAISE;
}
if (aCallerType == CallerType::NonSystem) {
flags |= nsIFocusManager::FLAG_NONSYSTEMCALLER;
}
fm->SetFocus(target, flags);
}
nsresult nsContentUtils::DispatchEventOnlyToChrome(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, Composed aComposed,
bool* aDefaultAction) {
return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
aComposed, Trusted::eYes, aDefaultAction,
ChromeOnlyDispatch::eYes);
}
/* static */
Element* nsContentUtils::MatchElementId(nsIContent* aContent,
const nsAtom* aId) {
for (nsIContent* cur = aContent; cur; cur = cur->GetNextNode(aContent)) {
if (aId == cur->GetID()) {
return cur->AsElement();
}
}
return nullptr;
}
/* static */
Element* nsContentUtils::MatchElementId(nsIContent* aContent,
const nsAString& aId) {
MOZ_ASSERT(!aId.IsEmpty(), "Will match random elements");
// ID attrs are generally stored as atoms, so just atomize this up front
RefPtr<nsAtom> id(NS_Atomize(aId));
if (!id) {
// OOM, so just bail
return nullptr;
}
return MatchElementId(aContent, id);
}
/* static */
void nsContentUtils::RegisterShutdownObserver(nsIObserver* aObserver) {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->AddObserver(aObserver, NS_XPCOM_SHUTDOWN_OBSERVER_ID,
false);
}
}
/* static */
void nsContentUtils::UnregisterShutdownObserver(nsIObserver* aObserver) {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->RemoveObserver(aObserver, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
}
}
/* static */
bool nsContentUtils::HasNonEmptyAttr(const nsIContent* aContent,
int32_t aNameSpaceID, nsAtom* aName) {
static Element::AttrValuesArray strings[] = {nsGkAtoms::_empty, nullptr};
return aContent->IsElement() &&
aContent->AsElement()->FindAttrValueIn(aNameSpaceID, aName, strings,
eCaseMatters) ==
Element::ATTR_VALUE_NO_MATCH;
}
/* static */
bool nsContentUtils::HasMutationListeners(nsINode* aNode, uint32_t aType,
nsINode* aTargetForSubtreeModified) {
Document* doc = aNode->OwnerDoc();
// global object will be null for documents that don't have windows.
nsPIDOMWindowInner* window = doc->GetInnerWindow();
// This relies on EventListenerManager::AddEventListener, which sets
// all mutation bits when there is a listener for DOMSubtreeModified event.
if (window && !window->HasMutationListeners(aType)) {
return false;
}
if (aNode->ChromeOnlyAccess() || aNode->IsInShadowTree()) {
return false;
}
doc->MayDispatchMutationEvent(aTargetForSubtreeModified);
// If we have a window, we can check it for mutation listeners now.
if (aNode->IsInUncomposedDoc()) {
nsCOMPtr<EventTarget> piTarget(do_QueryInterface(window));
if (piTarget) {
EventListenerManager* manager = piTarget->GetExistingListenerManager();
if (manager && manager->HasMutationListeners()) {
return true;
}
}
}
// If we have a window, we know a mutation listener is registered, but it
// might not be in our chain. If we don't have a window, we might have a
// mutation listener. Check quickly to see.
while (aNode) {
EventListenerManager* manager = aNode->GetExistingListenerManager();
if (manager && manager->HasMutationListeners()) {
return true;
}
aNode = aNode->GetParentNode();
}
return false;
}
/* static */
bool nsContentUtils::HasMutationListeners(Document* aDocument, uint32_t aType) {
nsPIDOMWindowInner* window =
aDocument ? aDocument->GetInnerWindow() : nullptr;
// This relies on EventListenerManager::AddEventListener, which sets
// all mutation bits when there is a listener for DOMSubtreeModified event.
return !window || window->HasMutationListeners(aType);
}
void nsContentUtils::MaybeFireNodeRemoved(nsINode* aChild, nsINode* aParent) {
MOZ_ASSERT(aChild, "Missing child");
MOZ_ASSERT(aChild->GetParentNode() == aParent, "Wrong parent");
MOZ_ASSERT(aChild->OwnerDoc() == aParent->OwnerDoc(), "Wrong owner-doc");
// Having an explicit check here since it's an easy mistake to fall into,
// and there might be existing code with problems. We'd rather be safe
// than fire DOMNodeRemoved in all corner cases. We also rely on it for
// nsAutoScriptBlockerSuppressNodeRemoved.
if (!IsSafeToRunScript()) {
// This checks that IsSafeToRunScript is true since we don't want to fire
// events when that is false. We can't rely on EventDispatcher to assert
// this in this situation since most of the time there are no mutation
// event listeners, in which case we won't even attempt to dispatch events.
// However this also allows for two exceptions. First off, we don't assert
// if the mutation happens to native anonymous content since we never fire
// mutation events on such content anyway.
// Second, we don't assert if sDOMNodeRemovedSuppressCount is true since
// that is a know case when we'd normally fire a mutation event, but can't
// make that safe and so we suppress it at this time. Ideally this should
// go away eventually.
if (!aChild->IsInNativeAnonymousSubtree() &&
!sDOMNodeRemovedSuppressCount) {
NS_ERROR("Want to fire DOMNodeRemoved event, but it's not safe");
WarnScriptWasIgnored(aChild->OwnerDoc());
}
return;
}
{
Document* doc = aParent->OwnerDoc();
if (MOZ_UNLIKELY(doc->DevToolsWatchingDOMMutations()) &&
aChild->IsInComposedDoc() && !aChild->ChromeOnlyAccess()) {
DispatchChromeEvent(doc, aChild, u"devtoolschildremoved"_ns,
CanBubble::eNo, Cancelable::eNo);
}
}
if (HasMutationListeners(aChild, NS_EVENT_BITS_MUTATION_NODEREMOVED,
aParent)) {
InternalMutationEvent mutation(true, eLegacyNodeRemoved);
mutation.mRelatedNode = aParent;
mozAutoSubtreeModified subtree(aParent->OwnerDoc(), aParent);
EventDispatcher::Dispatch(aChild, nullptr, &mutation);
}
}
void nsContentUtils::UnmarkGrayJSListenersInCCGenerationDocuments() {
if (!sEventListenerManagersHash) {
return;
}
for (auto i = sEventListenerManagersHash->Iter(); !i.Done(); i.Next()) {
auto entry = static_cast<EventListenerManagerMapEntry*>(i.Get());
nsINode* n = static_cast<nsINode*>(entry->mListenerManager->GetTarget());
if (n && n->IsInComposedDoc() &&
nsCCUncollectableMarker::InGeneration(
n->OwnerDoc()->GetMarkedCCGeneration())) {
entry->mListenerManager->MarkForCC();
}
}
}
/* static */
void nsContentUtils::TraverseListenerManager(
nsINode* aNode, nsCycleCollectionTraversalCallback& cb) {
if (!sEventListenerManagersHash) {
// We're already shut down, just return.
return;
}
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Search(aNode));
if (entry) {
CycleCollectionNoteChild(cb, entry->mListenerManager.get(),
"[via hash] mListenerManager");
}
}
EventListenerManager* nsContentUtils::GetListenerManagerForNode(
nsINode* aNode) {
if (!sEventListenerManagersHash) {
// We're already shut down, don't bother creating an event listener
// manager.
return nullptr;
}
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Add(aNode, fallible));
if (!entry) {
return nullptr;
}
if (!entry->mListenerManager) {
entry->mListenerManager = new EventListenerManager(aNode);
aNode->SetFlags(NODE_HAS_LISTENERMANAGER);
}
return entry->mListenerManager;
}
EventListenerManager* nsContentUtils::GetExistingListenerManagerForNode(
const nsINode* aNode) {
if (!aNode->HasFlag(NODE_HAS_LISTENERMANAGER)) {
return nullptr;
}
if (!sEventListenerManagersHash) {
// We're already shut down, don't bother creating an event listener
// manager.
return nullptr;
}
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Search(aNode));
if (entry) {
return entry->mListenerManager;
}
return nullptr;
}
void nsContentUtils::AddEntryToDOMArenaTable(nsINode* aNode,
DOMArena* aDOMArena) {
MOZ_ASSERT(StaticPrefs::dom_arena_allocator_enabled_AtStartup());
MOZ_ASSERT_IF(sDOMArenaHashtable, !sDOMArenaHashtable->Contains(aNode));
MOZ_ASSERT(!aNode->HasFlag(NODE_KEEPS_DOMARENA));
if (!sDOMArenaHashtable) {
sDOMArenaHashtable =
new nsRefPtrHashtable<nsPtrHashKey<const nsINode>, dom::DOMArena>();
}
aNode->SetFlags(NODE_KEEPS_DOMARENA);
sDOMArenaHashtable->InsertOrUpdate(aNode, RefPtr<DOMArena>(aDOMArena));
}
already_AddRefed<DOMArena> nsContentUtils::TakeEntryFromDOMArenaTable(
const nsINode* aNode) {
MOZ_ASSERT(sDOMArenaHashtable->Contains(aNode));
MOZ_ASSERT(StaticPrefs::dom_arena_allocator_enabled_AtStartup());
RefPtr<DOMArena> arena;
sDOMArenaHashtable->Remove(aNode, getter_AddRefs(arena));
return arena.forget();
}
/* static */
void nsContentUtils::RemoveListenerManager(nsINode* aNode) {
if (sEventListenerManagersHash) {
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Search(aNode));
if (entry) {
RefPtr<EventListenerManager> listenerManager;
listenerManager.swap(entry->mListenerManager);
// Remove the entry and *then* do operations that could cause further
// modification of sEventListenerManagersHash. See bug 334177.
sEventListenerManagersHash->RawRemove(entry);
if (listenerManager) {
listenerManager->Disconnect();
}
}
}
}
/* static */
bool nsContentUtils::IsValidNodeName(nsAtom* aLocalName, nsAtom* aPrefix,
int32_t aNamespaceID) {
if (aNamespaceID == kNameSpaceID_Unknown) {
return false;
}
if (!aPrefix) {
// If the prefix is null, then either the QName must be xmlns or the
// namespace must not be XMLNS.
return (aLocalName == nsGkAtoms::xmlns) ==
(aNamespaceID == kNameSpaceID_XMLNS);
}
// If the prefix is non-null then the namespace must not be null.
if (aNamespaceID == kNameSpaceID_None) {
return false;
}
// If the namespace is the XMLNS namespace then the prefix must be xmlns,
// but the localname must not be xmlns.
if (aNamespaceID == kNameSpaceID_XMLNS) {
return aPrefix == nsGkAtoms::xmlns && aLocalName != nsGkAtoms::xmlns;
}
// If the namespace is not the XMLNS namespace then the prefix must not be
// xmlns.
// If the namespace is the XML namespace then the prefix can be anything.
// If the namespace is not the XML namespace then the prefix must not be xml.
return aPrefix != nsGkAtoms::xmlns &&
(aNamespaceID == kNameSpaceID_XML || aPrefix != nsGkAtoms::xml);
}
already_AddRefed<DocumentFragment> nsContentUtils::CreateContextualFragment(
nsINode* aContextNode, const nsAString& aFragment,
bool aPreventScriptExecution, ErrorResult& aRv) {
if (!aContextNode) {
aRv.Throw(NS_ERROR_INVALID_ARG);
return nullptr;
}
// If we don't have a document here, we can't get the right security context
// for compiling event handlers... so just bail out.
RefPtr<Document> document = aContextNode->OwnerDoc();
bool isHTML = document->IsHTMLDocument();
if (isHTML) {
RefPtr<DocumentFragment> frag = new (document->NodeInfoManager())
DocumentFragment(document->NodeInfoManager());
Element* element = aContextNode->GetAsElementOrParentElement();
if (element && !element->IsHTMLElement(nsGkAtoms::html)) {
aRv = ParseFragmentHTML(
aFragment, frag, element->NodeInfo()->NameAtom(),
element->GetNameSpaceID(),
(document->GetCompatibilityMode() == eCompatibility_NavQuirks),
aPreventScriptExecution);
} else {
aRv = ParseFragmentHTML(
aFragment, frag, nsGkAtoms::body, kNameSpaceID_XHTML,
(document->GetCompatibilityMode() == eCompatibility_NavQuirks),
aPreventScriptExecution);
}
return frag.forget();
}
AutoTArray<nsString, 32> tagStack;
nsAutoString uriStr, nameStr;
for (Element* element : aContextNode->InclusiveAncestorsOfType<Element>()) {
nsString& tagName = *tagStack.AppendElement();
// It mostly doesn't actually matter what tag name we use here: XML doesn't
// have parsing that depends on the open tag stack, apart from namespace
// declarations. So this whole tagStack bit is just there to get the right
// namespace declarations to the XML parser. That said, the parser _is_
// going to create elements with the tag names we provide here, so we need
// to make sure they are not names that can trigger custom element
// constructors. Just make up a name that is never going to be a valid
// custom element name.
//
// The principled way to do this would probably be to add a new FromParser
// value and make sure we use it when creating the context elements, then
// make sure we teach all FromParser consumers (and in particular the custom
// element code) about it as needed. But right now the XML parser never
// actually uses FromParser values other than NOT_FROM_PARSER, and changing
// that is pretty complicated.
tagName.AssignLiteral("notacustomelement");
// see if we need to add xmlns declarations
uint32_t count = element->GetAttrCount();
bool setDefaultNamespace = false;
if (count > 0) {
uint32_t index;
for (index = 0; index < count; index++) {
const BorrowedAttrInfo info = element->GetAttrInfoAt(index);
const nsAttrName* name = info.mName;
if (name->NamespaceEquals(kNameSpaceID_XMLNS)) {
info.mValue->ToString(uriStr);
// really want something like nsXMLContentSerializer::SerializeAttr
tagName.AppendLiteral(" xmlns"); // space important
if (name->GetPrefix()) {
tagName.Append(char16_t(':'));
name->LocalName()->ToString(nameStr);
tagName.Append(nameStr);
} else {
setDefaultNamespace = true;
}
tagName.AppendLiteral(R"(=")");
tagName.Append(uriStr);
tagName.Append('"');
}
}
}
if (!setDefaultNamespace) {
mozilla::dom::NodeInfo* info = element->NodeInfo();
if (!info->GetPrefixAtom() && info->NamespaceID() != kNameSpaceID_None) {
// We have no namespace prefix, but have a namespace ID. Push
// default namespace attr in, so that our kids will be in our
// namespace.
info->GetNamespaceURI(uriStr);
tagName.AppendLiteral(R"( xmlns=")");
tagName.Append(uriStr);
tagName.Append('"');
}
}
}
RefPtr<DocumentFragment> frag;
aRv = ParseFragmentXML(aFragment, document, tagStack, aPreventScriptExecution,
-1, getter_AddRefs(frag));
return frag.forget();
}
/* static */
void nsContentUtils::DropFragmentParsers() {
NS_IF_RELEASE(sHTMLFragmentParser);
NS_IF_RELEASE(sXMLFragmentParser);
NS_IF_RELEASE(sXMLFragmentSink);
}
/* static */
void nsContentUtils::XPCOMShutdown() { nsContentUtils::DropFragmentParsers(); }
/* Helper function to compuate Sanitization Flags for ParseFramentHTML/XML */
uint32_t computeSanitizationFlags(nsIPrincipal* aPrincipal, int32_t aFlags) {
uint32_t sanitizationFlags = 0;
if (aPrincipal->IsSystemPrincipal()) {
if (aFlags < 0) {
// if this is a chrome-privileged document and no explicit flags
// were passed, then use this sanitization flags.
sanitizationFlags = nsIParserUtils::SanitizerAllowStyle |
nsIParserUtils::SanitizerAllowComments |
nsIParserUtils::SanitizerDropForms |
nsIParserUtils::SanitizerLogRemovals;
} else {
// if the caller explicitly passes flags, then we use those
// flags but additionally drop forms.
sanitizationFlags = aFlags | nsIParserUtils::SanitizerDropForms;
}
} else if (aFlags >= 0) {
// aFlags by default is -1 and is only ever non equal to -1 if the
// caller of ParseFragmentHTML/ParseFragmentXML is
// ParserUtils::ParseFragment(). Only in that case we should use
// the sanitization flags passed within aFlags.
sanitizationFlags = aFlags;
}
return sanitizationFlags;
}
/* static */
bool AllowsUnsanitizedContentForAboutNewTab(nsIPrincipal* aPrincipal) {
if (StaticPrefs::dom_about_newtab_sanitization_enabled() ||
!aPrincipal->SchemeIs("about")) {
return false;
}
uint32_t aboutModuleFlags = 0;
aPrincipal->GetAboutModuleFlags(&aboutModuleFlags);
return aboutModuleFlags & nsIAboutModule::ALLOW_UNSANITIZED_CONTENT;
}
/* static */
nsresult nsContentUtils::ParseFragmentHTML(
const nsAString& aSourceBuffer, nsIContent* aTargetNode,
nsAtom* aContextLocalName, int32_t aContextNamespace, bool aQuirks,
bool aPreventScriptExecution, int32_t aFlags) {
AutoTimelineMarker m(aTargetNode->OwnerDoc()->GetDocShell(), "Parse HTML");
if (nsContentUtils::sFragmentParsingActive) {
MOZ_ASSERT_UNREACHABLE("Re-entrant fragment parsing attempted.");
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
nsContentUtils::sFragmentParsingActive = true;
if (!sHTMLFragmentParser) {
NS_ADDREF(sHTMLFragmentParser = new nsHtml5StringParser());
// Now sHTMLFragmentParser owns the object
}
nsCOMPtr<nsIPrincipal> nodePrincipal = aTargetNode->NodePrincipal();
#ifdef DEBUG
// aFlags should always be -1 unless the caller of ParseFragmentHTML
// is ParserUtils::ParseFragment() which is the only caller that intends
// sanitization. For all other callers we need to ensure to call
// AuditParsingOfHTMLXMLFragments.
if (aFlags < 0) {
DOMSecurityMonitor::AuditParsingOfHTMLXMLFragments(nodePrincipal,
aSourceBuffer);
}
#endif
nsIContent* target = aTargetNode;
RefPtr<Document> doc = aTargetNode->OwnerDoc();
RefPtr<DocumentFragment> fragment;
// We sanitize if the fragment occurs in a system privileged
// context, an about: page, or if there are explicit sanitization flags.
// Please note that about:blank and about:srcdoc inherit the security
// context from the embedding context and hence are not loaded using
// an about: scheme principal.
bool shouldSanitize = nodePrincipal->IsSystemPrincipal() ||
nodePrincipal->SchemeIs("about") || aFlags >= 0;
if (shouldSanitize &&
!AllowsUnsanitizedContentForAboutNewTab(nodePrincipal)) {
if (!doc->IsLoadedAsData()) {
doc = nsContentUtils::CreateInertHTMLDocument(doc);
if (!doc) {
return NS_ERROR_FAILURE;
}
}
fragment =
new (doc->NodeInfoManager()) DocumentFragment(doc->NodeInfoManager());
target = fragment;
}
nsresult rv = sHTMLFragmentParser->ParseFragment(
aSourceBuffer, target, aContextLocalName, aContextNamespace, aQuirks,
aPreventScriptExecution);
NS_ENSURE_SUCCESS(rv, rv);
if (fragment) {
uint32_t sanitizationFlags =
computeSanitizationFlags(nodePrincipal, aFlags);
// Don't fire mutation events for nodes removed by the sanitizer.
nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker;
nsTreeSanitizer sanitizer(sanitizationFlags);
sanitizer.Sanitize(fragment);
ErrorResult error;
aTargetNode->AppendChild(*fragment, error);
rv = error.StealNSResult();
}
return rv;
}
/* static */
nsresult nsContentUtils::ParseDocumentHTML(
const nsAString& aSourceBuffer, Document* aTargetDocument,
bool aScriptingEnabledForNoscriptParsing) {
AutoTimelineMarker m(aTargetDocument->GetDocShell(), "Parse HTML");
if (nsContentUtils::sFragmentParsingActive) {
MOZ_ASSERT_UNREACHABLE("Re-entrant fragment parsing attempted.");
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
nsContentUtils::sFragmentParsingActive = true;
if (!sHTMLFragmentParser) {
NS_ADDREF(sHTMLFragmentParser = new nsHtml5StringParser());
// Now sHTMLFragmentParser owns the object
}
nsresult rv = sHTMLFragmentParser->ParseDocument(
aSourceBuffer, aTargetDocument, aScriptingEnabledForNoscriptParsing);
return rv;
}
/* static */
nsresult nsContentUtils::ParseFragmentXML(const nsAString& aSourceBuffer,
Document* aDocument,
nsTArray<nsString>& aTagStack,
bool aPreventScriptExecution,
int32_t aFlags,
DocumentFragment** aReturn) {
AutoTimelineMarker m(aDocument->GetDocShell(), "Parse XML");
if (nsContentUtils::sFragmentParsingActive) {
MOZ_ASSERT_UNREACHABLE("Re-entrant fragment parsing attempted.");
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
nsContentUtils::sFragmentParsingActive = true;
if (!sXMLFragmentParser) {
nsCOMPtr<nsIParser> parser = do_CreateInstance(kCParserCID);
parser.forget(&sXMLFragmentParser);
// sXMLFragmentParser now owns the parser
}
if (!sXMLFragmentSink) {
NS_NewXMLFragmentContentSink(&sXMLFragmentSink);
// sXMLFragmentSink now owns the sink
}
nsCOMPtr<nsIContentSink> contentsink = do_QueryInterface(sXMLFragmentSink);
MOZ_ASSERT(contentsink, "Sink doesn't QI to nsIContentSink!");
sXMLFragmentParser->SetContentSink(contentsink);
RefPtr<Document> doc;
nsCOMPtr<nsIPrincipal> nodePrincipal = aDocument->NodePrincipal();
#ifdef DEBUG
// aFlags should always be -1 unless the caller of ParseFragmentXML
// is ParserUtils::ParseFragment() which is the only caller that intends
// sanitization. For all other callers we need to ensure to call
// AuditParsingOfHTMLXMLFragments.
if (aFlags < 0) {
DOMSecurityMonitor::AuditParsingOfHTMLXMLFragments(nodePrincipal,
aSourceBuffer);
}
#endif
// We sanitize if the fragment occurs in a system privileged
// context, an about: page, or if there are explicit sanitization flags.
// Please note that about:blank and about:srcdoc inherit the security
// context from the embedding context and hence are not loaded using
// an about: scheme principal.
bool shouldSanitize = nodePrincipal->IsSystemPrincipal() ||
nodePrincipal->SchemeIs("about") || aFlags >= 0;
if (shouldSanitize && !aDocument->IsLoadedAsData()) {
doc = nsContentUtils::CreateInertXMLDocument(aDocument);
} else {
doc = aDocument;
}
sXMLFragmentSink->SetTargetDocument(doc);
sXMLFragmentSink->SetPreventScriptExecution(aPreventScriptExecution);
nsresult rv = sXMLFragmentParser->ParseFragment(aSourceBuffer, aTagStack);
if (NS_FAILED(rv)) {
// Drop the fragment parser and sink that might be in an inconsistent state
NS_IF_RELEASE(sXMLFragmentParser);
NS_IF_RELEASE(sXMLFragmentSink);
return rv;
}
rv = sXMLFragmentSink->FinishFragmentParsing(aReturn);
sXMLFragmentParser->Reset();
NS_ENSURE_SUCCESS(rv, rv);
if (shouldSanitize) {
uint32_t sanitizationFlags =
computeSanitizationFlags(nodePrincipal, aFlags);
// Don't fire mutation events for nodes removed by the sanitizer.
nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker;
nsTreeSanitizer sanitizer(sanitizationFlags);
sanitizer.Sanitize(*aReturn);
}
return rv;
}
/* static */
nsresult nsContentUtils::ConvertToPlainText(const nsAString& aSourceBuffer,
nsAString& aResultBuffer,
uint32_t aFlags,
uint32_t aWrapCol) {
RefPtr<Document> document = nsContentUtils::CreateInertHTMLDocument(nullptr);
if (!document) {
return NS_ERROR_FAILURE;
}
nsresult rv = nsContentUtils::ParseDocumentHTML(
aSourceBuffer, document,
!(aFlags & nsIDocumentEncoder::OutputNoScriptContent));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDocumentEncoder> encoder = do_createDocumentEncoder("text/plain");
rv = encoder->Init(document, u"text/plain"_ns, aFlags);
NS_ENSURE_SUCCESS(rv, rv);
encoder->SetWrapColumn(aWrapCol);
return encoder->EncodeToString(aResultBuffer);
}
static already_AddRefed<Document> CreateInertDocument(const Document* aTemplate,
DocumentFlavor aFlavor) {
if (aTemplate) {
bool hasHad = true;
nsIScriptGlobalObject* sgo = aTemplate->GetScriptHandlingObject(hasHad);
NS_ENSURE_TRUE(sgo || !hasHad, nullptr);
nsCOMPtr<Document> doc;
nsresult rv = NS_NewDOMDocument(
getter_AddRefs(doc), u""_ns, u""_ns, nullptr,
aTemplate->GetDocumentURI(), aTemplate->GetDocBaseURI(),
aTemplate->NodePrincipal(), true, sgo, aFlavor);
if (NS_FAILED(rv)) {
return nullptr;
}
return doc.forget();
}
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), "about:blank"_ns);
if (!uri) {
return nullptr;
}
RefPtr<NullPrincipal> nullPrincipal =
NullPrincipal::CreateWithoutOriginAttributes();
if (!nullPrincipal) {
return nullptr;
}
nsCOMPtr<Document> doc;
nsresult rv =
NS_NewDOMDocument(getter_AddRefs(doc), u""_ns, u""_ns, nullptr, uri, uri,
nullPrincipal, true, nullptr, aFlavor);
if (NS_FAILED(rv)) {
return nullptr;
}
return doc.forget();
}
/* static */
already_AddRefed<Document> nsContentUtils::CreateInertXMLDocument(
const Document* aTemplate) {
return CreateInertDocument(aTemplate, DocumentFlavorXML);
}
/* static */
already_AddRefed<Document> nsContentUtils::CreateInertHTMLDocument(
const Document* aTemplate) {
return CreateInertDocument(aTemplate, DocumentFlavorHTML);
}
/* static */
nsresult nsContentUtils::SetNodeTextContent(nsIContent* aContent,
const nsAString& aValue,
bool aTryReuse) {
// Fire DOMNodeRemoved mutation events before we do anything else.
nsCOMPtr<nsIContent> owningContent;
// Batch possible DOMSubtreeModified events.
mozAutoSubtreeModified subtree(nullptr, nullptr);
// Scope firing mutation events so that we don't carry any state that
// might be stale
{
// We're relying on mozAutoSubtreeModified to keep a strong reference if
// needed.
Document* doc = aContent->OwnerDoc();
// Optimize the common case of there being no observers
if (HasMutationListeners(doc, NS_EVENT_BITS_MUTATION_NODEREMOVED)) {
subtree.UpdateTarget(doc, nullptr);
owningContent = aContent;
nsCOMPtr<nsINode> child;
bool skipFirst = aTryReuse;
for (child = aContent->GetFirstChild();
child && child->GetParentNode() == aContent;
child = child->GetNextSibling()) {
if (skipFirst && child->IsText()) {
skipFirst = false;
continue;
}
nsContentUtils::MaybeFireNodeRemoved(child, aContent);
}
}
}
// Might as well stick a batch around this since we're performing several
// mutations.
mozAutoDocUpdate updateBatch(aContent->GetComposedDoc(), true);
nsAutoMutationBatch mb;
if (aTryReuse && !aValue.IsEmpty()) {
// Let's remove nodes until we find a eTEXT.
while (aContent->HasChildren()) {
nsIContent* child = aContent->GetFirstChild();
if (child->IsText()) {
break;
}
aContent->RemoveChildNode(child, true);
}
// If we have a node, it must be a eTEXT and we reuse it.
if (aContent->HasChildren()) {
nsIContent* child = aContent->GetFirstChild();
nsresult rv = child->AsText()->SetText(aValue, true);
NS_ENSURE_SUCCESS(rv, rv);
// All the following nodes, if they exist, must be deleted.
while (nsIContent* nextChild = child->GetNextSibling()) {
aContent->RemoveChildNode(nextChild, true);
}
}
if (aContent->HasChildren()) {
return NS_OK;
}
} else {
mb.Init(aContent, true, false);
while (aContent->HasChildren()) {
aContent->RemoveChildNode(aContent->GetFirstChild(), true);
}
}
mb.RemovalDone();
if (aValue.IsEmpty()) {
return NS_OK;
}
RefPtr<nsTextNode> textContent = new (aContent->NodeInfo()->NodeInfoManager())
nsTextNode(aContent->NodeInfo()->NodeInfoManager());
textContent->SetText(aValue, true);
ErrorResult rv;
aContent->AppendChildTo(textContent, true, rv);
mb.NodesAdded();
return rv.StealNSResult();
}
static bool AppendNodeTextContentsRecurse(nsINode* aNode, nsAString& aResult,
const fallible_t& aFallible) {
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->IsElement()) {
bool ok = AppendNodeTextContentsRecurse(child, aResult, aFallible);
if (!ok) {
return false;
}
} else if (Text* text = child->GetAsText()) {
bool ok = text->AppendTextTo(aResult, aFallible);
if (!ok) {
return false;
}
}
}
return true;
}
/* static */
bool nsContentUtils::AppendNodeTextContent(nsINode* aNode, bool aDeep,
nsAString& aResult,
const fallible_t& aFallible) {
if (Text* text = aNode->GetAsText()) {
return text->AppendTextTo(aResult, aFallible);
}
if (aDeep) {
return AppendNodeTextContentsRecurse(aNode, aResult, aFallible);
}
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (Text* text = child->GetAsText()) {
bool ok = text->AppendTextTo(aResult, fallible);
if (!ok) {
return false;
}
}
}
return true;
}
bool nsContentUtils::HasNonEmptyTextContent(
nsINode* aNode, TextContentDiscoverMode aDiscoverMode) {
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->IsText() && child->TextLength() > 0) {
return true;
}
if (aDiscoverMode == eRecurseIntoChildren &&
HasNonEmptyTextContent(child, aDiscoverMode)) {
return true;
}
}
return false;
}
/* static */
bool nsContentUtils::IsInSameAnonymousTree(const nsINode* aNode,
const nsIContent* aContent) {
MOZ_ASSERT(aNode, "Must have a node to work with");
MOZ_ASSERT(aContent, "Must have a content to work with");
if (aNode->IsInNativeAnonymousSubtree() !=
aContent->IsInNativeAnonymousSubtree()) {
return false;
}
if (aNode->IsInNativeAnonymousSubtree()) {
return aContent->GetClosestNativeAnonymousSubtreeRoot() ==
aNode->GetClosestNativeAnonymousSubtreeRoot();
}
// FIXME: This doesn't deal with disconnected nodes whatsoever, but it didn't
// use to either. Maybe that's fine.
return aNode->GetContainingShadow() == aContent->GetContainingShadow();
}
/* static */
bool nsContentUtils::IsInInteractiveHTMLContent(const Element* aElement,
const Element* aStop) {
const Element* element = aElement;
while (element && element != aStop) {
if (element->IsInteractiveHTMLContent()) {
return true;
}
element = element->GetFlattenedTreeParentElement();
}
return false;
}
/* static */
void nsContentUtils::NotifyInstalledMenuKeyboardListener(bool aInstalling) {
IMEStateManager::OnInstalledMenuKeyboardListener(aInstalling);
}
/* static */
bool nsContentUtils::SchemeIs(nsIURI* aURI, const char* aScheme) {
nsCOMPtr<nsIURI> baseURI = NS_GetInnermostURI(aURI);
NS_ENSURE_TRUE(baseURI, false);
return baseURI->SchemeIs(aScheme);
}
bool nsContentUtils::IsExpandedPrincipal(nsIPrincipal* aPrincipal) {
nsCOMPtr<nsIExpandedPrincipal> ep = do_QueryInterface(aPrincipal);
return !!ep;
}
bool nsContentUtils::IsSystemOrExpandedPrincipal(nsIPrincipal* aPrincipal) {
return (aPrincipal && aPrincipal->IsSystemPrincipal()) ||
IsExpandedPrincipal(aPrincipal);
}
nsIPrincipal* nsContentUtils::GetSystemPrincipal() {
MOZ_ASSERT(IsInitialized());
return sSystemPrincipal;
}
bool nsContentUtils::CombineResourcePrincipals(
nsCOMPtr<nsIPrincipal>* aResourcePrincipal, nsIPrincipal* aExtraPrincipal) {
if (!aExtraPrincipal) {
return false;
}
if (!*aResourcePrincipal) {
*aResourcePrincipal = aExtraPrincipal;
return true;
}
if (*aResourcePrincipal == aExtraPrincipal) {
return false;
}
bool subsumes;
if (NS_SUCCEEDED(
(*aResourcePrincipal)->Subsumes(aExtraPrincipal, &subsumes)) &&
subsumes) {
return false;
}
*aResourcePrincipal = sSystemPrincipal;
return true;
}
/* static */
void nsContentUtils::TriggerLink(nsIContent* aContent, nsIURI* aLinkURI,
const nsString& aTargetSpec, bool aClick,
bool aIsTrusted) {
MOZ_ASSERT(aLinkURI, "No link URI");
if (aContent->IsEditable() || !aContent->OwnerDoc()->LinkHandlingEnabled()) {
return;
}
nsCOMPtr<nsIDocShell> docShell = aContent->OwnerDoc()->GetDocShell();
if (!docShell) {
return;
}
if (!aClick) {
nsDocShell::Cast(docShell)->OnOverLink(aContent, aLinkURI, aTargetSpec);
return;
}
// Check that this page is allowed to load this URI.
nsresult proceed = NS_OK;
if (sSecurityManager) {
uint32_t flag = static_cast<uint32_t>(nsIScriptSecurityManager::STANDARD);
proceed = sSecurityManager->CheckLoadURIWithPrincipal(
aContent->NodePrincipal(), aLinkURI, flag,
aContent->OwnerDoc()->InnerWindowID());
}
// Only pass off the click event if the script security manager says it's ok.
// We need to rest aTargetSpec for forced downloads.
if (NS_SUCCEEDED(proceed)) {
// A link/area element with a download attribute is allowed to set
// a pseudo Content-Disposition header.
// For security reasons we only allow websites to declare same-origin
// resources as downloadable. If this check fails we will just do the normal
// thing (i.e. navigate to the resource).
nsAutoString fileName;
if ((!aContent->IsHTMLElement(nsGkAtoms::a) &&
!aContent->IsHTMLElement(nsGkAtoms::area) &&
!aContent->IsSVGElement(nsGkAtoms::a)) ||
!aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::download,
fileName) ||
NS_FAILED(aContent->NodePrincipal()->CheckMayLoad(aLinkURI, true))) {
fileName.SetIsVoid(true); // No actionable download attribute was found.
}
nsCOMPtr<nsIPrincipal> triggeringPrincipal = aContent->NodePrincipal();
nsCOMPtr<nsIContentSecurityPolicy> csp = aContent->GetCsp();
// Sanitize fileNames containing null characters by replacing them with
// underscores.
if (!fileName.IsVoid()) {
fileName.ReplaceChar(char16_t(0), '_');
}
nsDocShell::Cast(docShell)->OnLinkClick(
aContent, aLinkURI, fileName.IsVoid() ? aTargetSpec : u""_ns, fileName,
nullptr, nullptr, UserActivation::IsHandlingUserInput(), aIsTrusted,
triggeringPrincipal, csp);
}
}
/* static */
void nsContentUtils::GetLinkLocation(Element* aElement,
nsString& aLocationString) {
nsCOMPtr<nsIURI> hrefURI = aElement->GetHrefURI();
if (hrefURI) {
nsAutoCString specUTF8;
nsresult rv = hrefURI->GetSpec(specUTF8);
if (NS_SUCCEEDED(rv)) CopyUTF8toUTF16(specUTF8, aLocationString);
}
}
/* static */
nsIWidget* nsContentUtils::GetTopLevelWidget(nsIWidget* aWidget) {
if (!aWidget) return nullptr;
return aWidget->GetTopLevelWidget();
}
/* static */
const nsDependentString nsContentUtils::GetLocalizedEllipsis() {
static char16_t sBuf[4] = {0, 0, 0, 0};
if (!sBuf[0]) {
if (!SpoofLocaleEnglish()) {
nsAutoString tmp;
Preferences::GetLocalizedString("intl.ellipsis", tmp);
uint32_t len =
std::min(uint32_t(tmp.Length()), uint32_t(ArrayLength(sBuf) - 1));
CopyUnicodeTo(tmp, 0, sBuf, len);
}
if (!sBuf[0]) sBuf[0] = char16_t(0x2026);
}
return nsDependentString(sBuf);
}
/* static */
void nsContentUtils::AddScriptBlocker() {
MOZ_ASSERT(NS_IsMainThread());
if (!sScriptBlockerCount) {
MOZ_ASSERT(sRunnersCountAtFirstBlocker == 0,
"Should not already have a count");
sRunnersCountAtFirstBlocker =
sBlockedScriptRunners ? sBlockedScriptRunners->Length() : 0;
}
++sScriptBlockerCount;
}
#ifdef DEBUG
static bool sRemovingScriptBlockers = false;
#endif
/* static */
void nsContentUtils::RemoveScriptBlocker() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!sRemovingScriptBlockers);
NS_ASSERTION(sScriptBlockerCount != 0, "Negative script blockers");
--sScriptBlockerCount;
if (sScriptBlockerCount) {
return;
}
if (!sBlockedScriptRunners) {
return;
}
uint32_t firstBlocker = sRunnersCountAtFirstBlocker;
uint32_t lastBlocker = sBlockedScriptRunners->Length();
uint32_t originalFirstBlocker = firstBlocker;
uint32_t blockersCount = lastBlocker - firstBlocker;
sRunnersCountAtFirstBlocker = 0;
NS_ASSERTION(firstBlocker <= lastBlocker, "bad sRunnersCountAtFirstBlocker");
while (firstBlocker < lastBlocker) {
nsCOMPtr<nsIRunnable> runnable;
runnable.swap((*sBlockedScriptRunners)[firstBlocker]);
++firstBlocker;
// Calling the runnable can reenter us
{
AUTO_PROFILE_FOLLOWING_RUNNABLE(runnable);
runnable->Run();
}
// So can dropping the reference to the runnable
runnable = nullptr;
NS_ASSERTION(sRunnersCountAtFirstBlocker == 0, "Bad count");
NS_ASSERTION(!sScriptBlockerCount, "This is really bad");
}
#ifdef DEBUG
AutoRestore<bool> removingScriptBlockers(sRemovingScriptBlockers);
sRemovingScriptBlockers = true;
#endif
sBlockedScriptRunners->RemoveElementsAt(originalFirstBlocker, blockersCount);
}
/* static */
already_AddRefed<nsPIDOMWindowOuter>
nsContentUtils::GetMostRecentNonPBWindow() {
nsCOMPtr<nsIWindowMediator> wm = do_GetService(NS_WINDOWMEDIATOR_CONTRACTID);
nsCOMPtr<mozIDOMWindowProxy> window;
wm->GetMostRecentNonPBWindow(u"navigator:browser", getter_AddRefs(window));
nsCOMPtr<nsPIDOMWindowOuter> pwindow;
pwindow = do_QueryInterface(window);
return pwindow.forget();
}
/* static */
void nsContentUtils::WarnScriptWasIgnored(Document* aDocument) {
nsAutoString msg;
bool privateBrowsing = false;
bool chromeContext = false;
if (aDocument) {
nsCOMPtr<nsIURI> uri = aDocument->GetDocumentURI();
if (uri) {
msg.Append(NS_ConvertUTF8toUTF16(uri->GetSpecOrDefault()));
msg.AppendLiteral(" : ");
}
privateBrowsing =
!!aDocument->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId;
chromeContext = aDocument->NodePrincipal()->IsSystemPrincipal();
}
msg.AppendLiteral(
"Unable to run script because scripts are blocked internally.");
LogSimpleConsoleError(msg, "DOM", privateBrowsing, chromeContext);
}
/* static */
void nsContentUtils::AddScriptRunner(already_AddRefed<nsIRunnable> aRunnable) {
nsCOMPtr<nsIRunnable> runnable = aRunnable;
if (!runnable) {
return;
}
if (sScriptBlockerCount) {
sBlockedScriptRunners->AppendElement(runnable.forget());
return;
}
AUTO_PROFILE_FOLLOWING_RUNNABLE(runnable);
runnable->Run();
}
/* static */
void nsContentUtils::AddScriptRunner(nsIRunnable* aRunnable) {
nsCOMPtr<nsIRunnable> runnable = aRunnable;
AddScriptRunner(runnable.forget());
}
/* static */ bool nsContentUtils::IsSafeToRunScript() {
MOZ_ASSERT(NS_IsMainThread(),
"This static variable only makes sense on the main thread!");
return sScriptBlockerCount == 0;
}
/* static */
void nsContentUtils::RunInStableState(already_AddRefed<nsIRunnable> aRunnable) {
MOZ_ASSERT(CycleCollectedJSContext::Get(), "Must be on a script thread!");
CycleCollectedJSContext::Get()->RunInStableState(std::move(aRunnable));
}
/* static */
void nsContentUtils::AddPendingIDBTransaction(
already_AddRefed<nsIRunnable> aTransaction) {
MOZ_ASSERT(CycleCollectedJSContext::Get(), "Must be on a script thread!");
CycleCollectedJSContext::Get()->AddPendingIDBTransaction(
std::move(aTransaction));
}
/* static */
bool nsContentUtils::IsInStableOrMetaStableState() {
MOZ_ASSERT(CycleCollectedJSContext::Get(), "Must be on a script thread!");
return CycleCollectedJSContext::Get()->IsInStableOrMetaStableState();
}
/* static */
void nsContentUtils::HidePopupsInDocument(Document* aDocument) {
#ifdef MOZ_XUL
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm && aDocument) {
nsCOMPtr<nsIDocShellTreeItem> docShellToHide = aDocument->GetDocShell();
if (docShellToHide) pm->HidePopupsInDocShell(docShellToHide);
}
#endif
}
/* static */
already_AddRefed<nsIDragSession> nsContentUtils::GetDragSession() {
nsCOMPtr<nsIDragSession> dragSession;
nsCOMPtr<nsIDragService> dragService =
do_GetService("@mozilla.org/widget/dragservice;1");
if (dragService) dragService->GetCurrentSession(getter_AddRefs(dragSession));
return dragSession.forget();
}
/* static */
nsresult nsContentUtils::SetDataTransferInEvent(WidgetDragEvent* aDragEvent) {
if (aDragEvent->mDataTransfer || !aDragEvent->IsTrusted()) {
return NS_OK;
}
// For dragstart events, the data transfer object is
// created before the event fires, so it should already be set. For other
// drag events, get the object from the drag session.
NS_ASSERTION(aDragEvent->mMessage != eDragStart,
"draggesture event created without a dataTransfer");
nsCOMPtr<nsIDragSession> dragSession = GetDragSession();
NS_ENSURE_TRUE(dragSession, NS_OK); // no drag in progress
RefPtr<DataTransfer> initialDataTransfer = dragSession->GetDataTransfer();
if (!initialDataTransfer) {
// A dataTransfer won't exist when a drag was started by some other
// means, for instance calling the drag service directly, or a drag
// from another application. In either case, a new dataTransfer should
// be created that reflects the data.
initialDataTransfer =
new DataTransfer(aDragEvent->mTarget, aDragEvent->mMessage, true, -1);
// now set it in the drag session so we don't need to create it again
dragSession->SetDataTransfer(initialDataTransfer);
}
bool isCrossDomainSubFrameDrop = false;
if (aDragEvent->mMessage == eDrop) {
isCrossDomainSubFrameDrop = CheckForSubFrameDrop(dragSession, aDragEvent);
}
// each event should use a clone of the original dataTransfer.
initialDataTransfer->Clone(
aDragEvent->mTarget, aDragEvent->mMessage, aDragEvent->mUserCancelled,
isCrossDomainSubFrameDrop, getter_AddRefs(aDragEvent->mDataTransfer));
if (NS_WARN_IF(!aDragEvent->mDataTransfer)) {
return NS_ERROR_OUT_OF_MEMORY;
}
// for the dragenter and dragover events, initialize the drop effect
// from the drop action, which platform specific widget code sets before
// the event is fired based on the keyboard state.
if (aDragEvent->mMessage == eDragEnter || aDragEvent->mMessage == eDragOver) {
uint32_t action;
dragSession->GetDragAction(&action);
uint32_t effectAllowed = aDragEvent->mDataTransfer->EffectAllowedInt();
aDragEvent->mDataTransfer->SetDropEffectInt(
FilterDropEffect(action, effectAllowed));
} else if (aDragEvent->mMessage == eDrop ||
aDragEvent->mMessage == eDragEnd) {
// For the drop and dragend events, set the drop effect based on the
// last value that the dropEffect had. This will have been set in
// EventStateManager::PostHandleEvent for the last dragenter or
// dragover event.
aDragEvent->mDataTransfer->SetDropEffectInt(
initialDataTransfer->DropEffectInt());
}
return NS_OK;
}
/* static */
uint32_t nsContentUtils::FilterDropEffect(uint32_t aAction,
uint32_t aEffectAllowed) {
// It is possible for the drag action to include more than one action, but
// the widget code which sets the action from the keyboard state should only
// be including one. If multiple actions were set, we just consider them in
// the following order:
// copy, link, move
if (aAction & nsIDragService::DRAGDROP_ACTION_COPY)
aAction = nsIDragService::DRAGDROP_ACTION_COPY;
else if (aAction & nsIDragService::DRAGDROP_ACTION_LINK)
aAction = nsIDragService::DRAGDROP_ACTION_LINK;
else if (aAction & nsIDragService::DRAGDROP_ACTION_MOVE)
aAction = nsIDragService::DRAGDROP_ACTION_MOVE;
// Filter the action based on the effectAllowed. If the effectAllowed
// doesn't include the action, then that action cannot be done, so adjust
// the action to something that is allowed. For a copy, adjust to move or
// link. For a move, adjust to copy or link. For a link, adjust to move or
// link. Otherwise, use none.
if (aAction & aEffectAllowed ||
aEffectAllowed == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED)
return aAction;
if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_MOVE)
return nsIDragService::DRAGDROP_ACTION_MOVE;
if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_COPY)
return nsIDragService::DRAGDROP_ACTION_COPY;
if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_LINK)
return nsIDragService::DRAGDROP_ACTION_LINK;
return nsIDragService::DRAGDROP_ACTION_NONE;
}
/* static */
bool nsContentUtils::CheckForSubFrameDrop(nsIDragSession* aDragSession,
WidgetDragEvent* aDropEvent) {
nsCOMPtr<nsIContent> target =
nsIContent::FromEventTargetOrNull(aDropEvent->mOriginalTarget);
if (!target) {
return true;
}
// Always allow dropping onto chrome shells.
BrowsingContext* targetBC = target->OwnerDoc()->GetBrowsingContext();
if (targetBC->IsChrome()) {
return false;
}
WindowContext* targetWC = target->OwnerDoc()->GetWindowContext();
// If there is no source browsing context, then this is a drag from another
// application, which should be allowed.
RefPtr<WindowContext> sourceWC;
aDragSession->GetSourceWindowContext(getter_AddRefs(sourceWC));
if (sourceWC) {
// Get each successive parent of the source document and compare it to
// the drop document. If they match, then this is a drag from a child frame.
for (sourceWC = sourceWC->GetParentWindowContext(); sourceWC;
sourceWC = sourceWC->GetParentWindowContext()) {
// If the source and the target match, then the drag started in a
// descendant frame. If the source is discarded, err on the side of
// caution and treat it as a subframe drag.
if (sourceWC == targetWC || sourceWC->IsDiscarded()) {
return true;
}
}
}
return false;
}
/* static */
bool nsContentUtils::URIIsLocalFile(nsIURI* aURI) {
bool isFile;
nsCOMPtr<nsINetUtil> util = do_QueryInterface(sIOService);
// Important: we do NOT test the entire URI chain here!
return util &&
NS_SUCCEEDED(util->ProtocolHasFlags(
aURI, nsIProtocolHandler::URI_IS_LOCAL_FILE, &isFile)) &&
isFile;
}
/* static */
JSContext* nsContentUtils::GetCurrentJSContext() {
MOZ_ASSERT(IsInitialized());
if (!IsJSAPIActive()) {
return nullptr;
}
return danger::GetJSContext();
}
template <typename StringType, typename CharType>
void _ASCIIToLowerInSitu(StringType& aStr) {
CharType* iter = aStr.BeginWriting();
CharType* end = aStr.EndWriting();
MOZ_ASSERT(iter && end);
while (iter != end) {
CharType c = *iter;
if (c >= 'A' && c <= 'Z') {
*iter = c + ('a' - 'A');
}
++iter;
}
}
/* static */
void nsContentUtils::ASCIIToLower(nsAString& aStr) {
return _ASCIIToLowerInSitu<nsAString, char16_t>(aStr);
}
/* static */
void nsContentUtils::ASCIIToLower(nsACString& aStr) {
return _ASCIIToLowerInSitu<nsACString, char>(aStr);
}
template <typename StringType, typename CharType>
void _ASCIIToLowerCopy(const StringType& aSource, StringType& aDest) {
uint32_t len = aSource.Length();
aDest.SetLength(len);
MOZ_ASSERT(aDest.Length() == len);
CharType* dest = aDest.BeginWriting();
MOZ_ASSERT(dest);
const CharType* iter = aSource.BeginReading();
const CharType* end = aSource.EndReading();
while (iter != end) {
CharType c = *iter;
*dest = (c >= 'A' && c <= 'Z') ? c + ('a' - 'A') : c;
++iter;
++dest;
}
}
/* static */
void nsContentUtils::ASCIIToLower(const nsAString& aSource, nsAString& aDest) {
return _ASCIIToLowerCopy<nsAString, char16_t>(aSource, aDest);
}
/* static */
void nsContentUtils::ASCIIToLower(const nsACString& aSource,
nsACString& aDest) {
return _ASCIIToLowerCopy<nsACString, char>(aSource, aDest);
}
template <typename StringType, typename CharType>
void _ASCIIToUpperInSitu(StringType& aStr) {
CharType* iter = aStr.BeginWriting();
CharType* end = aStr.EndWriting();
MOZ_ASSERT(iter && end);
while (iter != end) {
CharType c = *iter;
if (c >= 'a' && c <= 'z') {
*iter = c + ('A' - 'a');
}
++iter;
}
}
/* static */
void nsContentUtils::ASCIIToUpper(nsAString& aStr) {
return _ASCIIToUpperInSitu<nsAString, char16_t>(aStr);
}
/* static */
void nsContentUtils::ASCIIToUpper(nsACString& aStr) {
return _ASCIIToUpperInSitu<nsACString, char>(aStr);
}
template <typename StringType, typename CharType>
void _ASCIIToUpperCopy(const StringType& aSource, StringType& aDest) {
uint32_t len = aSource.Length();
aDest.SetLength(len);
MOZ_ASSERT(aDest.Length() == len);
CharType* dest = aDest.BeginWriting();
MOZ_ASSERT(dest);
const CharType* iter = aSource.BeginReading();
const CharType* end = aSource.EndReading();
while (iter != end) {
CharType c = *iter;
*dest = (c >= 'a' && c <= 'z') ? c + ('A' - 'a') : c;
++iter;
++dest;
}
}
/* static */
void nsContentUtils::ASCIIToUpper(const nsAString& aSource, nsAString& aDest) {
return _ASCIIToUpperCopy<nsAString, char16_t>(aSource, aDest);
}
/* static */
void nsContentUtils::ASCIIToUpper(const nsACString& aSource,
nsACString& aDest) {
return _ASCIIToUpperCopy<nsACString, char>(aSource, aDest);
}
/* static */
bool nsContentUtils::EqualsIgnoreASCIICase(nsAtom* aAtom1, nsAtom* aAtom2) {
if (aAtom1 == aAtom2) {
return true;
}
// If both are ascii lowercase already, we know that the slow comparison
// below is going to return false.
if (aAtom1->IsAsciiLowercase() && aAtom2->IsAsciiLowercase()) {
return false;
}
return EqualsIgnoreASCIICase(nsDependentAtomString(aAtom1),
nsDependentAtomString(aAtom2));
}
/* static */
bool nsContentUtils::EqualsIgnoreASCIICase(const nsAString& aStr1,
const nsAString& aStr2) {
uint32_t len = aStr1.Length();
if (len != aStr2.Length()) {
return false;
}
const char16_t* str1 = aStr1.BeginReading();
const char16_t* str2 = aStr2.BeginReading();
const char16_t* end = str1 + len;
while (str1 < end) {
char16_t c1 = *str1++;
char16_t c2 = *str2++;
// First check if any bits other than the 0x0020 differs
if ((c1 ^ c2) & 0xffdf) {
return false;
}
// We know they can only differ in the 0x0020 bit.
// Likely the two chars are the same, so check that first
if (c1 != c2) {
// They do differ, but since it's only in the 0x0020 bit, check if it's
// the same ascii char, but just differing in case
char16_t c1Upper = c1 & 0xffdf;
if (!('A' <= c1Upper && c1Upper <= 'Z')) {
return false;
}
}
}
return true;
}
/* static */
bool nsContentUtils::StringContainsASCIIUpper(const nsAString& aStr) {
const char16_t* iter = aStr.BeginReading();
const char16_t* end = aStr.EndReading();
while (iter != end) {
char16_t c = *iter;
if (c >= 'A' && c <= 'Z') {
return true;
}
++iter;
}
return false;
}
/* static */
nsIInterfaceRequestor* nsContentUtils::SameOriginChecker() {
if (!sSameOriginChecker) {
sSameOriginChecker = new SameOriginCheckerImpl();
NS_ADDREF(sSameOriginChecker);
}
return sSameOriginChecker;
}
/* static */
nsresult nsContentUtils::CheckSameOrigin(nsIChannel* aOldChannel,
nsIChannel* aNewChannel) {
if (!nsContentUtils::GetSecurityManager()) return NS_ERROR_NOT_AVAILABLE;
nsCOMPtr<nsIPrincipal> oldPrincipal;
nsContentUtils::GetSecurityManager()->GetChannelResultPrincipal(
aOldChannel, getter_AddRefs(oldPrincipal));
nsCOMPtr<nsIURI> newURI;
aNewChannel->GetURI(getter_AddRefs(newURI));
nsCOMPtr<nsIURI> newOriginalURI;
aNewChannel->GetOriginalURI(getter_AddRefs(newOriginalURI));
NS_ENSURE_STATE(oldPrincipal && newURI && newOriginalURI);
nsresult rv = oldPrincipal->CheckMayLoad(newURI, false);
if (NS_SUCCEEDED(rv) && newOriginalURI != newURI) {
rv = oldPrincipal->CheckMayLoad(newOriginalURI, false);
}
return rv;
}
NS_IMPL_ISUPPORTS(SameOriginCheckerImpl, nsIChannelEventSink,
nsIInterfaceRequestor)
NS_IMETHODIMP
SameOriginCheckerImpl::AsyncOnChannelRedirect(
nsIChannel* aOldChannel, nsIChannel* aNewChannel, uint32_t aFlags,
nsIAsyncVerifyRedirectCallback* cb) {
MOZ_ASSERT(aNewChannel, "Redirecting to null channel?");
nsresult rv = nsContentUtils::CheckSameOrigin(aOldChannel, aNewChannel);
if (NS_SUCCEEDED(rv)) {
cb->OnRedirectVerifyCallback(NS_OK);
}
return rv;
}
NS_IMETHODIMP
SameOriginCheckerImpl::GetInterface(const nsIID& aIID, void** aResult) {
return QueryInterface(aIID, aResult);
}
/* static */
nsresult nsContentUtils::GetASCIIOrigin(nsIURI* aURI, nsACString& aOrigin) {
MOZ_ASSERT(aURI, "missing uri");
// For Blob URI, the path is the URL of the owning page.
if (aURI->SchemeIs(BLOBURI_SCHEME)) {
nsAutoCString path;
nsresult rv = aURI->GetPathQueryRef(path);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), path);
if (NS_FAILED(rv)) {
aOrigin.AssignLiteral("null");
return NS_OK;
}
return GetASCIIOrigin(uri, aOrigin);
}
aOrigin.Truncate();
nsCOMPtr<nsIURI> uri = NS_GetInnermostURI(aURI);
NS_ENSURE_TRUE(uri, NS_ERROR_UNEXPECTED);
nsAutoCString host;
nsresult rv = uri->GetAsciiHost(host);
if (NS_SUCCEEDED(rv) && !host.IsEmpty()) {
nsAutoCString userPass;
uri->GetUserPass(userPass);
nsAutoCString prePath;
if (!userPass.IsEmpty()) {
rv = NS_MutateURI(uri).SetUserPass(""_ns).Finalize(uri);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = uri->GetPrePath(prePath);
NS_ENSURE_SUCCESS(rv, rv);
aOrigin = prePath;
} else {
aOrigin.AssignLiteral("null");
}
return NS_OK;
}
/* static */
nsresult nsContentUtils::GetUTFOrigin(nsIPrincipal* aPrincipal,
nsAString& aOrigin) {
MOZ_ASSERT(aPrincipal, "missing principal");
aOrigin.Truncate();
nsAutoCString asciiOrigin;
nsresult rv = aPrincipal->GetAsciiOrigin(asciiOrigin);
if (NS_FAILED(rv)) {
asciiOrigin.AssignLiteral("null");
}
CopyUTF8toUTF16(asciiOrigin, aOrigin);
return NS_OK;
}
/* static */
nsresult nsContentUtils::GetUTFOrigin(nsIURI* aURI, nsAString& aOrigin) {
MOZ_ASSERT(aURI, "missing uri");
nsresult rv;
#if defined(MOZ_THUNDERBIRD) || defined(MOZ_SUITE)
// Check if either URI has a special origin.
nsCOMPtr<nsIURIWithSpecialOrigin> uriWithSpecialOrigin =
do_QueryInterface(aURI);
if (uriWithSpecialOrigin) {
nsCOMPtr<nsIURI> origin;
rv = uriWithSpecialOrigin->GetOrigin(getter_AddRefs(origin));
NS_ENSURE_SUCCESS(rv, rv);
return GetUTFOrigin(origin, aOrigin);
}
#endif
nsAutoCString asciiOrigin;
rv = GetASCIIOrigin(aURI, asciiOrigin);
NS_ENSURE_SUCCESS(rv, rv);
CopyUTF8toUTF16(asciiOrigin, aOrigin);
return NS_OK;
}
/* static */
bool nsContentUtils::CheckMayLoad(nsIPrincipal* aPrincipal,
nsIChannel* aChannel,
bool aAllowIfInheritsPrincipal) {
nsCOMPtr<nsIURI> channelURI;
nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(channelURI));
NS_ENSURE_SUCCESS(rv, false);
return NS_SUCCEEDED(
aPrincipal->CheckMayLoad(channelURI, aAllowIfInheritsPrincipal));
}
/* static */
bool nsContentUtils::CanAccessNativeAnon() {
return LegacyIsCallerChromeOrNativeCode();
}
/* static */
nsresult nsContentUtils::DispatchXULCommand(nsIContent* aTarget, bool aTrusted,
Event* aSourceEvent,
PresShell* aPresShell, bool aCtrl,
bool aAlt, bool aShift, bool aMeta,
uint16_t aInputSource,
int16_t aButton) {
NS_ENSURE_STATE(aTarget);
Document* doc = aTarget->OwnerDoc();
nsPresContext* presContext = doc->GetPresContext();
RefPtr<XULCommandEvent> xulCommand =
new XULCommandEvent(doc, presContext, nullptr);
xulCommand->InitCommandEvent(u"command"_ns, true, true,
nsGlobalWindowInner::Cast(doc->GetInnerWindow()),
0, aCtrl, aAlt, aShift, aMeta, aButton,
aSourceEvent, aInputSource, IgnoreErrors());
if (aPresShell) {
nsEventStatus status = nsEventStatus_eIgnore;
return aPresShell->HandleDOMEventWithTarget(aTarget, xulCommand, &status);
}
ErrorResult rv;
aTarget->DispatchEvent(*xulCommand, rv);
return rv.StealNSResult();
}
// static
nsresult nsContentUtils::WrapNative(JSContext* cx, nsISupports* native,
nsWrapperCache* cache, const nsIID* aIID,
JS::MutableHandle<JS::Value> vp,
bool aAllowWrapping) {
MOZ_ASSERT(cx == GetCurrentJSContext());
if (!native) {
vp.setNull();
return NS_OK;
}
JSObject* wrapper = xpc_FastGetCachedWrapper(cx, cache, vp);
if (wrapper) {
return NS_OK;
}
NS_ENSURE_TRUE(sXPConnect, NS_ERROR_UNEXPECTED);
if (!NS_IsMainThread()) {
MOZ_CRASH();
}
JS::Rooted<JSObject*> scope(cx, JS::CurrentGlobalOrNull(cx));
nsresult rv = sXPConnect->WrapNativeToJSVal(cx, scope, native, cache, aIID,
aAllowWrapping, vp);
return rv;
}
nsresult nsContentUtils::CreateArrayBuffer(JSContext* aCx,
const nsACString& aData,
JSObject** aResult) {
if (!aCx) {
return NS_ERROR_FAILURE;
}
size_t dataLen = aData.Length();
*aResult = JS::NewArrayBuffer(aCx, dataLen);
if (!*aResult) {
return NS_ERROR_FAILURE;
}
if (dataLen > 0) {
NS_ASSERTION(JS::IsArrayBufferObject(*aResult), "What happened?");
JS::AutoCheckCannotGC nogc;
bool isShared;
memcpy(JS::GetArrayBufferData(*aResult, &isShared, nogc),
aData.BeginReading(), dataLen);
MOZ_ASSERT(!isShared);
}
return NS_OK;
}
void nsContentUtils::StripNullChars(const nsAString& aInStr,
nsAString& aOutStr) {
// In common cases where we don't have nulls in the
// string we can simple simply bypass the checking code.
int32_t firstNullPos = aInStr.FindChar('\0');
if (firstNullPos == kNotFound) {
aOutStr.Assign(aInStr);
return;
}
aOutStr.SetCapacity(aInStr.Length() - 1);
nsAString::const_iterator start, end;
aInStr.BeginReading(start);
aInStr.EndReading(end);
while (start != end) {
if (*start != '\0') aOutStr.Append(*start);
++start;
}
}
struct ClassMatchingInfo {
AtomArray mClasses;
nsCaseTreatment mCaseTreatment;
};
// static
bool nsContentUtils::MatchClassNames(Element* aElement, int32_t aNamespaceID,
nsAtom* aAtom, void* aData) {
// We can't match if there are no class names
const nsAttrValue* classAttr = aElement->GetClasses();
if (!classAttr) {
return false;
}
// need to match *all* of the classes
ClassMatchingInfo* info = static_cast<ClassMatchingInfo*>(aData);
uint32_t length = info->mClasses.Length();
if (!length) {
// If we actually had no classes, don't match.
return false;
}
uint32_t i;
for (i = 0; i < length; ++i) {
if (!classAttr->Contains(info->mClasses[i], info->mCaseTreatment)) {
return false;
}
}
return true;
}
// static
void nsContentUtils::DestroyClassNameArray(void* aData) {
ClassMatchingInfo* info = static_cast<ClassMatchingInfo*>(aData);
delete info;
}
// static
void* nsContentUtils::AllocClassMatchingInfo(nsINode* aRootNode,
const nsString* aClasses) {
nsAttrValue attrValue;
attrValue.ParseAtomArray(*aClasses);
// nsAttrValue::Equals is sensitive to order, so we'll send an array
auto* info = new ClassMatchingInfo;
if (attrValue.Type() == nsAttrValue::eAtomArray) {
info->mClasses = std::move(*(attrValue.GetAtomArrayValue()));
} else if (attrValue.Type() == nsAttrValue::eAtom) {
info->mClasses.AppendElement(attrValue.GetAtomValue());
}
info->mCaseTreatment =
aRootNode->OwnerDoc()->GetCompatibilityMode() == eCompatibility_NavQuirks
? eIgnoreCase
: eCaseMatters;
return info;
}
// static
bool nsContentUtils::IsFocusedContent(const nsIContent* aContent) {
nsFocusManager* fm = nsFocusManager::GetFocusManager();
return fm && fm->GetFocusedElement() == aContent;
}
bool nsContentUtils::IsSubDocumentTabbable(nsIContent* aContent) {
Document* doc = aContent->GetComposedDoc();
if (!doc) {
return false;
}
// If the subdocument lives in another process, the frame is
// tabbable.
if (EventStateManager::IsRemoteTarget(aContent)) {
return true;
}
// XXXbz should this use OwnerDoc() for GetSubDocumentFor?
// sXBL/XBL2 issue!
Document* subDoc = doc->GetSubDocumentFor(aContent);
if (!subDoc) {
return false;
}
nsCOMPtr<nsIDocShell> docShell = subDoc->GetDocShell();
if (!docShell) {
return false;
}
nsCOMPtr<nsIContentViewer> contentViewer;
docShell->GetContentViewer(getter_AddRefs(contentViewer));
if (!contentViewer) {
return false;
}
// If there are 2 viewers for the current docshell, that
// means the current document may be a zombie document.
// While load and pageshow events are dispatched, zombie viewer is the old,
// to be hidden document.
if (contentViewer->GetPreviousViewer()) {
bool inOnLoad = false;
docShell->GetIsExecutingOnLoadHandler(&inOnLoad);
return inOnLoad;
}
return true;
}
bool nsContentUtils::HasScrollgrab(nsIContent* aContent) {
// If we ever standardize this feature we'll want to hook this up properly
// again. For now we're removing all the DOM-side code related to it but
// leaving the layout and APZ handling for it in place.
return false;
}
void nsContentUtils::FlushLayoutForTree(nsPIDOMWindowOuter* aWindow) {
if (!aWindow) {
return;
}
// Note that because FlushPendingNotifications flushes parents, this
// is O(N^2) in docshell tree depth. However, the docshell tree is
// usually pretty shallow.
if (RefPtr<Document> doc = aWindow->GetDoc()) {
doc->FlushPendingNotifications(FlushType::Layout);
}
if (nsCOMPtr<nsIDocShell> docShell = aWindow->GetDocShell()) {
int32_t i = 0, i_end;
docShell->GetInProcessChildCount(&i_end);
for (; i < i_end; ++i) {
nsCOMPtr<nsIDocShellTreeItem> item;
if (docShell->GetInProcessChildAt(i, getter_AddRefs(item)) == NS_OK &&
item) {
if (nsCOMPtr<nsPIDOMWindowOuter> win = item->GetWindow()) {
FlushLayoutForTree(win);
}
}
}
}
}
void nsContentUtils::RemoveNewlines(nsString& aString) { aString.StripCRLF(); }
void nsContentUtils::PlatformToDOMLineBreaks(nsString& aString) {
if (!PlatformToDOMLineBreaks(aString, fallible)) {
aString.AllocFailed(aString.Length());
}
}
bool nsContentUtils::PlatformToDOMLineBreaks(nsString& aString,
const fallible_t& aFallible) {
if (aString.FindChar(char16_t('\r')) != -1) {
// Windows linebreaks: Map CRLF to LF:
if (!aString.ReplaceSubstring(u"\r\n", u"\n", aFallible)) {
return false;
}
// Mac linebreaks: Map any remaining CR to LF:
if (!aString.ReplaceSubstring(u"\r", u"\n", aFallible)) {
return false;
}
}
return true;
}
void nsContentUtils::PopulateStringFromStringBuffer(nsStringBuffer* aBuf,
nsAString& aResultString) {
MOZ_ASSERT(aBuf, "Expecting a non-null string buffer");
uint32_t stringLen = NS_strlen(static_cast<char16_t*>(aBuf->Data()));
// SANITY CHECK: In case the nsStringBuffer isn't correctly
// null-terminated, let's clamp its length using the allocated size, to be
// sure the resulting string doesn't sample past the end of the the buffer.
// (Note that StorageSize() is in units of bytes, so we have to convert that
// to units of PRUnichars, and subtract 1 for the null-terminator.)
uint32_t allocStringLen = (aBuf->StorageSize() / sizeof(char16_t)) - 1;
MOZ_ASSERT(stringLen <= allocStringLen,
"string buffer lacks null terminator!");
stringLen = std::min(stringLen, allocStringLen);
aBuf->ToString(stringLen, aResultString);
}
already_AddRefed<nsContentList> nsContentUtils::GetElementsByClassName(
nsINode* aRootNode, const nsAString& aClasses) {
MOZ_ASSERT(aRootNode, "Must have root node");
return GetFuncStringContentList<nsCacheableFuncStringHTMLCollection>(
aRootNode, MatchClassNames, DestroyClassNameArray, AllocClassMatchingInfo,
aClasses);
}
PresShell* nsContentUtils::FindPresShellForDocument(const Document* aDocument) {
const Document* doc = aDocument;
Document* displayDoc = doc->GetDisplayDocument();
if (displayDoc) {
doc = displayDoc;
}
PresShell* presShell = doc->GetPresShell();
if (presShell) {
return presShell;
}
nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = doc->GetDocShell();
while (docShellTreeItem) {
// We may be in a display:none subdocument, or we may not have a presshell
// created yet.
// Walk the docshell tree to find the nearest container that has a
// presshell, and return that.
nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(docShellTreeItem);
if (PresShell* presShell = docShell->GetPresShell()) {
return presShell;
}
nsCOMPtr<nsIDocShellTreeItem> parent;
docShellTreeItem->GetInProcessParent(getter_AddRefs(parent));
docShellTreeItem = parent;
}
return nullptr;
}
/* static */
nsPresContext* nsContentUtils::FindPresContextForDocument(
const Document* aDocument) {
if (PresShell* presShell = FindPresShellForDocument(aDocument)) {
return presShell->GetPresContext();
}
return nullptr;
}
nsIWidget* nsContentUtils::WidgetForDocument(const Document* aDocument) {
PresShell* presShell = FindPresShellForDocument(aDocument);
if (!presShell) {
return nullptr;
}
nsViewManager* vm = presShell->GetViewManager();
if (!vm) {
return nullptr;
}
nsView* rootView = vm->GetRootView();
if (!rootView) {
return nullptr;
}
nsView* displayRoot = nsViewManager::GetDisplayRootFor(rootView);
if (!displayRoot) {
return nullptr;
}
return displayRoot->GetNearestWidget(nullptr);
}
nsIWidget* nsContentUtils::WidgetForContent(const nsIContent* aContent) {
nsIFrame* frame = aContent->GetPrimaryFrame();
if (frame) {
frame = nsLayoutUtils::GetDisplayRootFrame(frame);
nsView* view = frame->GetView();
if (view) {
return view->GetWidget();
}
}
return nullptr;
}
WindowRenderer* nsContentUtils::WindowRendererForContent(
const nsIContent* aContent) {
nsIWidget* widget = nsContentUtils::WidgetForContent(aContent);
if (widget) {
return widget->GetWindowRenderer();
}
return nullptr;
}
WindowRenderer* nsContentUtils::WindowRendererForDocument(
const Document* aDoc) {
nsIWidget* widget = nsContentUtils::WidgetForDocument(aDoc);
if (widget) {
return widget->GetWindowRenderer();
}
return nullptr;
}
bool nsContentUtils::AllowXULXBLForPrincipal(nsIPrincipal* aPrincipal) {
if (!aPrincipal) {
return false;
}
if (aPrincipal->IsSystemPrincipal()) {
return true;
}
return (StaticPrefs::dom_allow_XUL_XBL_for_file() &&
aPrincipal->SchemeIs("file")) ||
IsSitePermAllow(aPrincipal, "allowXULXBL"_ns);
}
bool nsContentUtils::IsPDFJSEnabled() {
nsCOMPtr<nsIStreamConverter> conv = do_CreateInstance(
"@mozilla.org/streamconv;1?from=application/pdf&to=text/html");
return conv;
}
bool nsContentUtils::IsPDFJS(nsIPrincipal* aPrincipal) {
if (!aPrincipal) {
return false;
}
nsAutoCString spec;
nsresult rv = aPrincipal->GetAsciiSpec(spec);
NS_ENSURE_SUCCESS(rv, false);
return spec.EqualsLiteral("resource://pdf.js/web/viewer.html");
}
bool nsContentUtils::IsPDFJS(JSContext* aCx, JSObject*) {
return IsPDFJS(SubjectPrincipal(aCx));
}
already_AddRefed<nsIDocumentLoaderFactory>
nsContentUtils::FindInternalContentViewer(const nsACString& aType,
ContentViewerType* aLoaderType) {
if (aLoaderType) {
*aLoaderType = TYPE_UNSUPPORTED;
}
// one helper factory, please
nsCOMPtr<nsICategoryManager> catMan(
do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
if (!catMan) return nullptr;
nsCOMPtr<nsIDocumentLoaderFactory> docFactory;
nsCString contractID;
nsresult rv =
catMan->GetCategoryEntry("Gecko-Content-Viewers", aType, contractID);
if (NS_SUCCEEDED(rv)) {
docFactory = do_GetService(contractID.get());
if (docFactory && aLoaderType) {
if (contractID.EqualsLiteral(CONTENT_DLF_CONTRACTID))
*aLoaderType = TYPE_CONTENT;
else if (contractID.EqualsLiteral(PLUGIN_DLF_CONTRACTID))
*aLoaderType = TYPE_FALLBACK;
else
*aLoaderType = TYPE_UNKNOWN;
}
return docFactory.forget();
}
if (DecoderTraits::IsSupportedInVideoDocument(aType)) {
docFactory =
do_GetService("@mozilla.org/content/document-loader-factory;1");
if (docFactory && aLoaderType) {
*aLoaderType = TYPE_CONTENT;
}
return docFactory.forget();
}
return nullptr;
}
static void ReportPatternCompileFailure(nsAString& aPattern,
const Document* aDocument,
JS::MutableHandle<JS::Value> error,
JSContext* cx) {
JS::AutoSaveExceptionState savedExc(cx);
JS::RootedObject exnObj(cx, &error.toObject());
JS::RootedValue messageVal(cx);
if (!JS_GetProperty(cx, exnObj, "message", &messageVal)) {
return;
}
JS::RootedString messageStr(cx, messageVal.toString());
MOZ_ASSERT(messageStr);
AutoTArray<nsString, 2> strings;
strings.AppendElement(aPattern);
if (!AssignJSString(cx, *strings.AppendElement(), messageStr)) {
return;
}
nsContentUtils::ReportToConsole(nsIScriptError::errorFlag, "DOM"_ns,
aDocument, nsContentUtils::eDOM_PROPERTIES,
"PatternAttributeCompileFailure", strings);
savedExc.drop();
}
// static
Maybe<bool> nsContentUtils::IsPatternMatching(nsAString& aValue,
nsAString& aPattern,
const Document* aDocument) {
NS_ASSERTION(aDocument, "aDocument should be a valid pointer (not null)");
// The fact that we're using a JS regexp under the hood should not be visible
// to things like window onerror handlers, so we don't initialize our JSAPI
// with the document's window (which may not exist anyway).
AutoJSAPI jsapi;
jsapi.Init();
JSContext* cx = jsapi.cx();
AutoDisableJSInterruptCallback disabler(cx);
// We can use the junk scope here, because we're just using it for regexp
// evaluation, not actual script execution, and we disable statics so that the
// evaluation does not interact with the execution global.
JSAutoRealm ar(cx, xpc::PrivilegedJunkScope());
// Check if the pattern by itself is valid first, and not that it only becomes
// valid once we add ^(?: and )$.
JS::RootedValue error(cx);
if (!JS::CheckRegExpSyntax(
cx, static_cast<char16_t*>(aPattern.BeginWriting()),
aPattern.Length(), JS::RegExpFlag::Unicode, &error)) {
return Nothing();
}
if (!error.isUndefined()) {
ReportPatternCompileFailure(aPattern, aDocument, &error, cx);
return Some(true);
}
// The pattern has to match the entire value.
aPattern.InsertLiteral(u"^(?:", 0);
aPattern.AppendLiteral(")$");
JS::Rooted<JSObject*> re(
cx,
JS::NewUCRegExpObject(cx, static_cast<char16_t*>(aPattern.BeginWriting()),
aPattern.Length(), JS::RegExpFlag::Unicode));
if (!re) {
return Nothing();
}
JS::Rooted<JS::Value> rval(cx, JS::NullValue());
size_t idx = 0;
if (!JS::ExecuteRegExpNoStatics(cx, re,
static_cast<char16_t*>(aValue.BeginWriting()),
aValue.Length(), &idx, true, &rval)) {
return Nothing();
}
return Some(!rval.isNull());
}
// static
nsresult nsContentUtils::URIInheritsSecurityContext(nsIURI* aURI,
bool* aResult) {
// Note: about:blank URIs do NOT inherit the security context from the
// current document, which is what this function tests for...
return NS_URIChainHasFlags(
aURI, nsIProtocolHandler::URI_INHERITS_SECURITY_CONTEXT, aResult);
}
// static
bool nsContentUtils::ChannelShouldInheritPrincipal(
nsIPrincipal* aLoadingPrincipal, nsIURI* aURI, bool aInheritForAboutBlank,
bool aForceInherit) {
MOZ_ASSERT(aLoadingPrincipal,
"Can not check inheritance without a principal");
// Only tell the channel to inherit if it can't provide its own security
// context.
//
// XXX: If this is ever changed, check all callers for what owners
// they're passing in. In particular, see the code and
// comments in nsDocShell::LoadURI where we fall back on
// inheriting the owner if called from chrome. That would be
// very wrong if this code changed anything but channels that
// can't provide their own security context!
//
// If aForceInherit is true, we will inherit, even for a channel that
// can provide its own security context. This is used for srcdoc loads.
bool inherit = aForceInherit;
if (!inherit) {
bool uriInherits;
// We expect URIInheritsSecurityContext to return success for an
// about:blank URI, so don't call NS_IsAboutBlank() if this call fails.
// This condition needs to match the one in nsDocShell::InternalLoad where
// we're checking for things that will use the owner.
inherit =
(NS_SUCCEEDED(URIInheritsSecurityContext(aURI, &uriInherits)) &&
(uriInherits || (aInheritForAboutBlank && NS_IsAboutBlank(aURI)))) ||
//
// file: uri special-casing
//
// If this is a file: load opened from another file: then it may need
// to inherit the owner from the referrer so they can script each other.
// If we don't set the owner explicitly then each file: gets an owner
// based on its own codebase later.
//
(URIIsLocalFile(aURI) &&
NS_SUCCEEDED(aLoadingPrincipal->CheckMayLoad(aURI, false)) &&
// One more check here. CheckMayLoad will always return true for the
// system principal, but we do NOT want to inherit in that case.
!aLoadingPrincipal->IsSystemPrincipal());
}
return inherit;
}
/* static */
bool nsContentUtils::IsCutCopyAllowed(Document* aDocument,
nsIPrincipal& aSubjectPrincipal) {
if (StaticPrefs::dom_allow_cut_copy() && aDocument &&
aDocument->HasValidTransientUserGestureActivation()) {
return true;
}
return PrincipalHasPermission(aSubjectPrincipal, nsGkAtoms::clipboardWrite);
}
/* static */
bool nsContentUtils::HaveEqualPrincipals(Document* aDoc1, Document* aDoc2) {
if (!aDoc1 || !aDoc2) {
return false;
}
bool principalsEqual = false;
aDoc1->NodePrincipal()->Equals(aDoc2->NodePrincipal(), &principalsEqual);
return principalsEqual;
}
/* static */
bool nsContentUtils::HasPluginWithUncontrolledEventDispatch(
nsIContent* aContent) {
return false;
}
/* static */
void nsContentUtils::FireMutationEventsForDirectParsing(
Document* aDoc, nsIContent* aDest, int32_t aOldChildCount) {
// Fire mutation events. Optimize for the case when there are no listeners
int32_t newChildCount = aDest->GetChildCount();
if (newChildCount && nsContentUtils::HasMutationListeners(
aDoc, NS_EVENT_BITS_MUTATION_NODEINSERTED)) {
AutoTArray<nsCOMPtr<nsIContent>, 50> childNodes;
NS_ASSERTION(newChildCount - aOldChildCount >= 0,
"What, some unexpected dom mutation has happened?");
childNodes.SetCapacity(newChildCount - aOldChildCount);
for (nsIContent* child = aDest->GetFirstChild(); child;
child = child->GetNextSibling()) {
childNodes.AppendElement(child);
}
FragmentOrElement::FireNodeInserted(aDoc, aDest, childNodes);
}
}
/* static */
Document* nsContentUtils::GetInProcessSubtreeRootDocument(Document* aDoc) {
if (!aDoc) {
return nullptr;
}
Document* doc = aDoc;
while (doc->GetInProcessParentDocument()) {
doc = doc->GetInProcessParentDocument();
}
return doc;
}
// static
int32_t nsContentUtils::GetAdjustedOffsetInTextControl(nsIFrame* aOffsetFrame,
int32_t aOffset) {
// The structure of the anonymous frames within a text control frame is
// an optional block frame, followed by an optional br frame.
// If the offset frame has a child, then this frame is the block which
// has the text frames (containing the content) as its children. This will
// be the case if we click to the right of any of the text frames, or at the
// bottom of the text area.
nsIFrame* firstChild = aOffsetFrame->PrincipalChildList().FirstChild();
if (firstChild) {
// In this case, the passed-in offset is incorrect, and we want the length
// of the entire content in the text control frame.
return firstChild->GetContent()->Length();
}
if (aOffsetFrame->GetPrevSibling() && !aOffsetFrame->GetNextSibling()) {
// In this case, we're actually within the last frame, which is a br
// frame. Our offset should therefore be the length of the first child of
// our parent.
int32_t aOutOffset = aOffsetFrame->GetParent()
->PrincipalChildList()
.FirstChild()
->GetContent()
->Length();
return aOutOffset;
}
// Otherwise, we're within one of the text frames, in which case our offset
// has already been correctly calculated.
return aOffset;
}
// static
void nsContentUtils::GetSelectionInTextControl(Selection* aSelection,
Element* aRoot,
uint32_t& aOutStartOffset,
uint32_t& aOutEndOffset) {
MOZ_ASSERT(aSelection && aRoot);
// We don't care which end of this selection is anchor and which is focus. In
// fact, we explicitly want to know which is the _start_ and which is the
// _end_, not anchor vs focus.
const nsRange* range = aSelection->GetAnchorFocusRange();
if (!range) {
// Nothing selected
aOutStartOffset = aOutEndOffset = 0;
return;
}
// All the node pointers here are raw pointers for performance. We shouldn't
// be doing anything in this function that invalidates the node tree.
nsINode* startContainer = range->GetStartContainer();
uint32_t startOffset = range->StartOffset();
nsINode* endContainer = range->GetEndContainer();
uint32_t endOffset = range->EndOffset();
// We have at most two children, consisting of an optional text node followed
// by an optional <br>.
NS_ASSERTION(aRoot->GetChildCount() <= 2, "Unexpected children");
nsIContent* firstChild = aRoot->GetFirstChild();
#ifdef DEBUG
nsCOMPtr<nsIContent> lastChild = aRoot->GetLastChild();
NS_ASSERTION(startContainer == aRoot || startContainer == firstChild ||
startContainer == lastChild,
"Unexpected startContainer");
NS_ASSERTION(endContainer == aRoot || endContainer == firstChild ||
endContainer == lastChild,
"Unexpected endContainer");
// firstChild is either text or a <br> (hence an element).
MOZ_ASSERT_IF(firstChild, firstChild->IsText() || firstChild->IsElement());
#endif
// Testing IsElement() is faster than testing IsNodeOfType(), since it's
// non-virtual.
if (!firstChild || firstChild->IsElement()) {
// No text node, so everything is 0
startOffset = endOffset = 0;
} else {
// First child is text. If the start/end is already in the text node,
// or the start of the root node, no change needed. If it's in the root
// node but not the start, or in the trailing <br>, we need to set the
// offset to the end.
if ((startContainer == aRoot && startOffset != 0) ||
(startContainer != aRoot && startContainer != firstChild)) {
startOffset = firstChild->Length();
}
if ((endContainer == aRoot && endOffset != 0) ||
(endContainer != aRoot && endContainer != firstChild)) {
endOffset = firstChild->Length();
}
}
MOZ_ASSERT(startOffset <= endOffset);
aOutStartOffset = startOffset;
aOutEndOffset = endOffset;
}
// static
HTMLEditor* nsContentUtils::GetHTMLEditor(nsPresContext* aPresContext) {
if (!aPresContext) {
return nullptr;
}
return GetHTMLEditor(aPresContext->GetDocShell());
}
// static
HTMLEditor* nsContentUtils::GetHTMLEditor(nsDocShell* aDocShell) {
bool isEditable;
if (!aDocShell || NS_FAILED(aDocShell->GetEditable(&isEditable)) ||
!isEditable) {
return nullptr;
}
return aDocShell->GetHTMLEditor();
}
// static
EditorBase* nsContentUtils::GetActiveEditor(nsPresContext* aPresContext) {
if (!aPresContext) {
return nullptr;
}
return GetActiveEditor(aPresContext->Document()->GetWindow());
}
// static
EditorBase* nsContentUtils::GetActiveEditor(nsPIDOMWindowOuter* aWindow) {
if (!aWindow || !aWindow->GetExtantDoc()) {
return nullptr;
}
// If it's in designMode, nobody can have focus. Therefore, the HTMLEditor
// handles all events. I.e., it's focused editor in this case.
if (aWindow->GetExtantDoc()->IsInDesignMode()) {
return GetHTMLEditor(nsDocShell::Cast(aWindow->GetDocShell()));
}
// If focused element is associated with TextEditor, it must be <input>
// element or <textarea> element. Let's return it even if it's in a
// contenteditable element.
nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
if (Element* focusedElement = nsFocusManager::GetFocusedDescendant(
aWindow, nsFocusManager::SearchRange::eOnlyCurrentWindow,
getter_AddRefs(focusedWindow))) {
if (TextEditor* textEditor = focusedElement->GetTextEditorInternal()) {
return textEditor;
}
}
// Otherwise, HTMLEditor may handle inputs even non-editable element has
// focus or nobody has focus.
return GetHTMLEditor(nsDocShell::Cast(aWindow->GetDocShell()));
}
// static
TextEditor* nsContentUtils::GetTextEditorFromAnonymousNodeWithoutCreation(
const nsIContent* aAnonymousContent) {
if (!aAnonymousContent) {
return nullptr;
}
nsIContent* parent = aAnonymousContent->FindFirstNonChromeOnlyAccessContent();
if (!parent || parent == aAnonymousContent) {
return nullptr;
}
if (HTMLInputElement* inputElement =
HTMLInputElement::FromNodeOrNull(parent)) {
return inputElement->GetTextEditorWithoutCreation();
}
if (HTMLTextAreaElement* textareaElement =
HTMLTextAreaElement::FromNodeOrNull(parent)) {
return textareaElement->GetTextEditorWithoutCreation();
}
return nullptr;
}
// static
bool nsContentUtils::IsNodeInEditableRegion(nsINode* aNode) {
while (aNode) {
if (aNode->IsEditable()) {
return true;
}
aNode = aNode->GetParent();
}
return false;
}
// static
bool nsContentUtils::IsForbiddenRequestHeader(const nsACString& aHeader) {
if (IsForbiddenSystemRequestHeader(aHeader)) {
return true;
}
return StringBeginsWith(aHeader, "proxy-"_ns,
nsCaseInsensitiveCStringComparator) ||
StringBeginsWith(aHeader, "sec-"_ns,
nsCaseInsensitiveCStringComparator);
}
// static
bool nsContentUtils::IsForbiddenSystemRequestHeader(const nsACString& aHeader) {
static const char* kInvalidHeaders[] = {"accept-charset",
"accept-encoding",
"access-control-request-headers",
"access-control-request-method",
"connection",
"content-length",
"cookie",
"cookie2",
"date",
"dnt",
"expect",
"host",
"keep-alive",
"origin",
"referer",
"te",
"trailer",
"transfer-encoding",
"upgrade",
"via"};
for (auto& kInvalidHeader : kInvalidHeaders) {
if (aHeader.LowerCaseEqualsASCII(kInvalidHeader)) {
return true;
}
}
return false;
}
// static
bool nsContentUtils::IsForbiddenResponseHeader(const nsACString& aHeader) {
return (aHeader.LowerCaseEqualsASCII("set-cookie") ||
aHeader.LowerCaseEqualsASCII("set-cookie2"));
}
// static
bool nsContentUtils::IsCorsUnsafeRequestHeaderValue(
const nsACString& aHeaderValue) {
const char* cur = aHeaderValue.BeginReading();
const char* end = aHeaderValue.EndReading();
while (cur != end) {
// Implementation of
// https://fetch.spec.whatwg.org/#cors-unsafe-request-header-byte Is less
// than a space but not a horizontal tab
if ((*cur < ' ' && *cur != '\t') || *cur == '"' || *cur == '(' ||
*cur == ')' || *cur == ':' || *cur == '<' || *cur == '>' ||
*cur == '?' || *cur == '@' || *cur == '[' || *cur == '\\' ||
*cur == ']' || *cur == '{' || *cur == '}' ||
*cur == 0x7F) { // 0x75 is DEL
return true;
}
cur++;
}
return false;
}
// static
bool nsContentUtils::IsAllowedNonCorsAccept(const nsACString& aHeaderValue) {
if (IsCorsUnsafeRequestHeaderValue(aHeaderValue)) {
return false;
}
return true;
}
// static
bool nsContentUtils::IsAllowedNonCorsContentType(
const nsACString& aHeaderValue) {
nsAutoCString contentType;
nsAutoCString unused;
if (IsCorsUnsafeRequestHeaderValue(aHeaderValue)) {
return false;
}
nsresult rv = NS_ParseRequestContentType(aHeaderValue, contentType, unused);
if (NS_FAILED(rv)) {
return false;
}
return contentType.LowerCaseEqualsLiteral("text/plain") ||
contentType.LowerCaseEqualsLiteral(
"application/x-www-form-urlencoded") ||
contentType.LowerCaseEqualsLiteral("multipart/form-data");
}
// static
bool nsContentUtils::IsAllowedNonCorsLanguage(const nsACString& aHeaderValue) {
const char* cur = aHeaderValue.BeginReading();
const char* end = aHeaderValue.EndReading();
while (cur != end) {
if ((*cur >= '0' && *cur <= '9') || (*cur >= 'A' && *cur <= 'Z') ||
(*cur >= 'a' && *cur <= 'z') || *cur == ' ' || *cur == '*' ||
*cur == ',' || *cur == '-' || *cur == '.' || *cur == ';' ||
*cur == '=') {
cur++;
continue;
}
return false;
}
return true;
}
// static
bool nsContentUtils::IsCORSSafelistedRequestHeader(const nsACString& aName,
const nsACString& aValue) {
// see https://fetch.spec.whatwg.org/#cors-safelisted-request-header
if (aValue.Length() > 128) {
return false;
}
return (aName.LowerCaseEqualsLiteral("accept") &&
nsContentUtils::IsAllowedNonCorsAccept(aValue)) ||
(aName.LowerCaseEqualsLiteral("accept-language") &&
nsContentUtils::IsAllowedNonCorsLanguage(aValue)) ||
(aName.LowerCaseEqualsLiteral("content-language") &&
nsContentUtils::IsAllowedNonCorsLanguage(aValue)) ||
(aName.LowerCaseEqualsLiteral("content-type") &&
nsContentUtils::IsAllowedNonCorsContentType(aValue));
}
mozilla::LogModule* nsContentUtils::ResistFingerprintingLog() {
return gResistFingerprintingLog;
}
mozilla::LogModule* nsContentUtils::DOMDumpLog() { return sDOMDumpLog; }
bool nsContentUtils::GetNodeTextContent(nsINode* aNode, bool aDeep,
nsAString& aResult,
const fallible_t& aFallible) {
aResult.Truncate();
return AppendNodeTextContent(aNode, aDeep, aResult, aFallible);
}
void nsContentUtils::GetNodeTextContent(nsINode* aNode, bool aDeep,
nsAString& aResult) {
if (!GetNodeTextContent(aNode, aDeep, aResult, fallible)) {
NS_ABORT_OOM(0); // Unfortunately we don't know the allocation size
}
}
void nsContentUtils::DestroyMatchString(void* aData) {
if (aData) {
nsString* matchString = static_cast<nsString*>(aData);
delete matchString;
}
}
bool nsContentUtils::IsJavascriptMIMEType(const nsAString& aMIMEType) {
// Table ordered from most to least likely JS MIME types.
static const char* jsTypes[] = {"text/javascript",
"text/ecmascript",
"application/javascript",
"application/ecmascript",
"application/x-javascript",
"application/x-ecmascript",
"text/javascript1.0",
"text/javascript1.1",
"text/javascript1.2",
"text/javascript1.3",
"text/javascript1.4",
"text/javascript1.5",
"text/jscript",
"text/livescript",
"text/x-ecmascript",
"text/x-javascript",
nullptr};
for (uint32_t i = 0; jsTypes[i]; ++i) {
if (aMIMEType.LowerCaseEqualsASCII(jsTypes[i])) {
return true;
}
}
return false;
}
nsresult nsContentUtils::GenerateUUIDInPlace(nsID& aUUID) {
MOZ_ASSERT(sUUIDGenerator);
nsresult rv = sUUIDGenerator->GenerateUUIDInPlace(&aUUID);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsID nsContentUtils::GenerateUUID() {
MOZ_DIAGNOSTIC_ASSERT(sUUIDGenerator);
nsID uuid;
nsresult rv = sUUIDGenerator->GenerateUUIDInPlace(&uuid);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
return uuid;
}
bool nsContentUtils::PrefetchPreloadEnabled(nsIDocShell* aDocShell) {
//
// SECURITY CHECK: disable prefetching and preloading from mailnews!
//
// walk up the docshell tree to see if any containing
// docshell are of type MAIL.
//
if (!aDocShell) {
return false;
}
nsCOMPtr<nsIDocShell> docshell = aDocShell;
nsCOMPtr<nsIDocShellTreeItem> parentItem;
do {
auto appType = docshell->GetAppType();
if (appType == nsIDocShell::APP_TYPE_MAIL) {
return false; // do not prefetch, preload, preconnect from mailnews
}
docshell->GetInProcessParent(getter_AddRefs(parentItem));
if (parentItem) {
docshell = do_QueryInterface(parentItem);
if (!docshell) {
NS_ERROR("cannot get a docshell from a treeItem!");
return false;
}
}
} while (parentItem);
return true;
}
uint64_t nsContentUtils::GetInnerWindowID(nsIRequest* aRequest) {
// can't do anything if there's no nsIRequest!
if (!aRequest) {
return 0;
}
nsCOMPtr<nsILoadGroup> loadGroup;
nsresult rv = aRequest->GetLoadGroup(getter_AddRefs(loadGroup));
if (NS_FAILED(rv) || !loadGroup) {
return 0;
}
return GetInnerWindowID(loadGroup);
}
uint64_t nsContentUtils::GetInnerWindowID(nsILoadGroup* aLoadGroup) {
if (!aLoadGroup) {
return 0;
}
nsCOMPtr<nsIInterfaceRequestor> callbacks;
nsresult rv = aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (NS_FAILED(rv) || !callbacks) {
return 0;
}
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
if (!loadContext) {
return 0;
}
nsCOMPtr<mozIDOMWindowProxy> window;
rv = loadContext->GetAssociatedWindow(getter_AddRefs(window));
if (NS_FAILED(rv) || !window) {
return 0;
}
auto* pwindow = nsPIDOMWindowOuter::From(window);
if (!pwindow) {
return 0;
}
nsPIDOMWindowInner* inner = pwindow->GetCurrentInnerWindow();
return inner ? inner->WindowID() : 0;
}
// static
void nsContentUtils::MaybeFixIPv6Host(nsACString& aHost) {
if (aHost.FindChar(':') != -1) { // Escape IPv6 address
MOZ_ASSERT(!aHost.Length() ||
(aHost[0] != '[' && aHost[aHost.Length() - 1] != ']'));
aHost.Insert('[', 0);
aHost.Append(']');
}
}
nsresult nsContentUtils::GetHostOrIPv6WithBrackets(nsIURI* aURI,
nsACString& aHost) {
aHost.Truncate();
nsresult rv = aURI->GetHost(aHost);
if (NS_FAILED(rv)) { // Some URIs do not have a host
return rv;
}
MaybeFixIPv6Host(aHost);
return NS_OK;
}
nsresult nsContentUtils::GetHostOrIPv6WithBrackets(nsIURI* aURI,
nsAString& aHost) {
nsAutoCString hostname;
nsresult rv = GetHostOrIPv6WithBrackets(aURI, hostname);
if (NS_FAILED(rv)) {
return rv;
}
CopyUTF8toUTF16(hostname, aHost);
return NS_OK;
}
nsresult nsContentUtils::GetHostOrIPv6WithBrackets(nsIPrincipal* aPrincipal,
nsACString& aHost) {
nsresult rv = aPrincipal->GetAsciiHost(aHost);
if (NS_FAILED(rv)) { // Some URIs do not have a host
return rv;
}
MaybeFixIPv6Host(aHost);
return NS_OK;
}
CallState nsContentUtils::CallOnAllRemoteChildren(
MessageBroadcaster* aManager,
const std::function<CallState(BrowserParent*)>& aCallback) {
uint32_t browserChildCount = aManager->ChildCount();
for (uint32_t j = 0; j < browserChildCount; ++j) {
RefPtr<MessageListenerManager> childMM = aManager->GetChildAt(j);
if (!childMM) {
continue;
}
RefPtr<MessageBroadcaster> nonLeafMM = MessageBroadcaster::From(childMM);
if (nonLeafMM) {
if (CallOnAllRemoteChildren(nonLeafMM, aCallback) == CallState::Stop) {
return CallState::Stop;
}
continue;
}
mozilla::dom::ipc::MessageManagerCallback* cb = childMM->GetCallback();
if (cb) {
nsFrameLoader* fl = static_cast<nsFrameLoader*>(cb);
BrowserParent* remote = BrowserParent::GetFrom(fl);
if (remote && aCallback) {
if (aCallback(remote) == CallState::Stop) {
return CallState::Stop;
}
}
}
}
return CallState::Continue;
}
void nsContentUtils::CallOnAllRemoteChildren(
nsPIDOMWindowOuter* aWindow,
const std::function<CallState(BrowserParent*)>& aCallback) {
nsGlobalWindowOuter* window = nsGlobalWindowOuter::Cast(aWindow);
if (window->IsChromeWindow()) {
RefPtr<MessageBroadcaster> windowMM = window->GetMessageManager();
if (windowMM) {
CallOnAllRemoteChildren(windowMM, aCallback);
}
}
}
struct UIStateChangeInfo {
UIStateChangeType mShowFocusRings;
explicit UIStateChangeInfo(UIStateChangeType aShowFocusRings)
: mShowFocusRings(aShowFocusRings) {}
};
void nsContentUtils::SetKeyboardIndicatorsOnRemoteChildren(
nsPIDOMWindowOuter* aWindow, UIStateChangeType aShowFocusRings) {
UIStateChangeInfo stateInfo(aShowFocusRings);
CallOnAllRemoteChildren(aWindow, [&stateInfo](BrowserParent* aBrowserParent) {
Unused << aBrowserParent->SendSetKeyboardIndicators(
stateInfo.mShowFocusRings);
return CallState::Continue;
});
}
nsresult nsContentUtils::IPCTransferableToTransferable(
const IPCDataTransfer& aDataTransfer, const bool& aIsPrivateData,
nsIPrincipal* aRequestingPrincipal,
const nsContentPolicyType& aContentPolicyType,
nsITransferable* aTransferable, mozilla::dom::ContentParent* aContentParent,
mozilla::dom::BrowserChild* aBrowserChild) {
nsresult rv;
aTransferable->SetIsPrivateData(aIsPrivateData);
const nsTArray<IPCDataTransferItem>& items = aDataTransfer.items();
for (const auto& item : items) {
aTransferable->AddDataFlavor(item.flavor().get());
if (item.data().type() == IPCDataTransferData::TnsString) {
nsCOMPtr<nsISupportsString> dataWrapper =
do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
const nsString& text = item.data().get_nsString();
rv = dataWrapper->SetData(text);
NS_ENSURE_SUCCESS(rv, rv);
rv = aTransferable->SetTransferData(item.flavor().get(), dataWrapper);
NS_ENSURE_SUCCESS(rv, rv);
} else if (item.data().type() == IPCDataTransferData::TShmem) {
if (nsContentUtils::IsFlavorImage(item.flavor())) {
nsCOMPtr<imgIContainer> imageContainer;
rv = nsContentUtils::DataTransferItemToImage(
item, getter_AddRefs(imageContainer));
NS_ENSURE_SUCCESS(rv, rv);
aTransferable->SetTransferData(item.flavor().get(), imageContainer);
} else {
nsCOMPtr<nsISupportsCString> dataWrapper =
do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
// The buffer contains the terminating null.
Shmem itemData = item.data().get_Shmem();
const nsDependentCSubstring text(itemData.get<char>(),
itemData.Size<char>());
rv = dataWrapper->SetData(text);
NS_ENSURE_SUCCESS(rv, rv);
rv = aTransferable->SetTransferData(item.flavor().get(), dataWrapper);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aContentParent) {
Unused << aContentParent->DeallocShmem(item.data().get_Shmem());
} else if (aBrowserChild) {
Unused << aBrowserChild->DeallocShmem(item.data().get_Shmem());
}
}
}
aTransferable->SetRequestingPrincipal(aRequestingPrincipal);
aTransferable->SetContentPolicyType(aContentPolicyType);
return NS_OK;
}
void nsContentUtils::TransferablesToIPCTransferables(
nsIArray* aTransferables, nsTArray<IPCDataTransfer>& aIPC,
bool aInSyncMessage, mozilla::dom::ContentChild* aChild,
mozilla::dom::ContentParent* aParent) {
aIPC.Clear();
if (aTransferables) {
uint32_t transferableCount = 0;
aTransferables->GetLength(&transferableCount);
for (uint32_t i = 0; i < transferableCount; ++i) {
IPCDataTransfer* dt = aIPC.AppendElement();
nsCOMPtr<nsITransferable> transferable =
do_QueryElementAt(aTransferables, i);
TransferableToIPCTransferable(transferable, dt, aInSyncMessage, aChild,
aParent);
}
}
}
nsresult nsContentUtils::SlurpFileToString(nsIFile* aFile,
nsACString& aString) {
aString.Truncate();
nsCOMPtr<nsIURI> fileURI;
nsresult rv = NS_NewFileURI(getter_AddRefs(fileURI), aFile);
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsIChannel> channel;
rv = NS_NewChannel(getter_AddRefs(channel), fileURI,
nsContentUtils::GetSystemPrincipal(),
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
nsIContentPolicy::TYPE_OTHER);
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsIInputStream> stream;
rv = channel->Open(getter_AddRefs(stream));
if (NS_FAILED(rv)) {
return rv;
}
rv = NS_ConsumeStream(stream, UINT32_MAX, aString);
if (NS_FAILED(rv)) {
return rv;
}
rv = stream->Close();
if (NS_FAILED(rv)) {
return rv;
}
return NS_OK;
}
bool nsContentUtils::IsFileImage(nsIFile* aFile, nsACString& aType) {
nsCOMPtr<nsIMIMEService> mime = do_GetService("@mozilla.org/mime;1");
if (!mime) {
return false;
}
nsresult rv = mime->GetTypeFromFile(aFile, aType);
if (NS_FAILED(rv)) {
return false;
}
return StringBeginsWith(aType, "image/"_ns);
}
nsresult nsContentUtils::CalculateBufferSizeForImage(
const uint32_t& aStride, const IntSize& aImageSize,
const SurfaceFormat& aFormat, size_t* aMaxBufferSize,
size_t* aUsedBufferSize) {
CheckedInt32 requiredBytes =
CheckedInt32(aStride) * CheckedInt32(aImageSize.height);
CheckedInt32 usedBytes =
requiredBytes - aStride +
(CheckedInt32(aImageSize.width) * BytesPerPixel(aFormat));
if (!usedBytes.isValid()) {
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(requiredBytes.isValid(), "usedBytes valid but not required?");
*aMaxBufferSize = requiredBytes.value();
*aUsedBufferSize = usedBytes.value();
return NS_OK;
}
nsresult nsContentUtils::DataTransferItemToImage(
const IPCDataTransferItem& aItem, imgIContainer** aContainer) {
MOZ_ASSERT(aItem.data().type() == IPCDataTransferData::TShmem);
MOZ_ASSERT(IsFlavorImage(aItem.flavor()));
const IPCDataTransferImage& imageDetails = aItem.imageDetails();
const IntSize size(imageDetails.width(), imageDetails.height());
if (!size.width || !size.height) {
return NS_ERROR_FAILURE;
}
Shmem data = aItem.data().get_Shmem();
// Validate shared memory buffer size
size_t imageBufLen = 0;
size_t maxBufLen = 0;
nsresult rv = CalculateBufferSizeForImage(imageDetails.stride(), size,
imageDetails.format(), &maxBufLen,
&imageBufLen);
if (NS_FAILED(rv)) {
return rv;
}
if (imageBufLen > data.Size<uint8_t>()) {
return NS_ERROR_FAILURE;
}
RefPtr<DataSourceSurface> image = CreateDataSourceSurfaceFromData(
size, imageDetails.format(), data.get<uint8_t>(), imageDetails.stride());
RefPtr<gfxDrawable> drawable = new gfxSurfaceDrawable(image, size);
nsCOMPtr<imgIContainer> imageContainer =
image::ImageOps::CreateFromDrawable(drawable);
imageContainer.forget(aContainer);
return NS_OK;
}
bool nsContentUtils::IsFlavorImage(const nsACString& aFlavor) {
return aFlavor.EqualsLiteral(kNativeImageMime) ||
aFlavor.EqualsLiteral(kJPEGImageMime) ||
aFlavor.EqualsLiteral(kJPGImageMime) ||
aFlavor.EqualsLiteral(kPNGImageMime) ||
aFlavor.EqualsLiteral(kGIFImageMime);
}
static Shmem ConvertToShmem(mozilla::dom::ContentChild* aChild,
mozilla::dom::ContentParent* aParent,
const nsACString& aInput) {
MOZ_ASSERT((aChild && !aParent) || (!aChild && aParent));
IShmemAllocator* allocator = aChild ? static_cast<IShmemAllocator*>(aChild)
: static_cast<IShmemAllocator*>(aParent);
Shmem result;
if (!allocator->AllocShmem(aInput.Length(), SharedMemory::TYPE_BASIC,
&result)) {
return result;
}
memcpy(result.get<char>(), aInput.BeginReading(), aInput.Length());
return result;
}
void nsContentUtils::TransferableToIPCTransferable(
nsITransferable* aTransferable, IPCDataTransfer* aIPCDataTransfer,
bool aInSyncMessage, mozilla::dom::ContentChild* aChild,
mozilla::dom::ContentParent* aParent) {
MOZ_ASSERT((aChild && !aParent) || (!aChild && aParent));
if (aTransferable) {
nsTArray<nsCString> flavorList;
aTransferable->FlavorsTransferableCanExport(flavorList);
for (uint32_t j = 0; j < flavorList.Length(); ++j) {
nsCString& flavorStr = flavorList[j];
if (!flavorStr.Length()) {
continue;
}
nsCOMPtr<nsISupports> data;
nsresult rv =
aTransferable->GetTransferData(flavorStr.get(), getter_AddRefs(data));
if (NS_FAILED(rv) || !data) {
if (aInSyncMessage) {
// Can't do anything.
continue;
}
// This is a hack to support kFilePromiseMime.
// On Windows there just needs to be an entry for it,
// and for OSX we need to create
// nsContentAreaDragDropDataProvider as nsIFlavorDataProvider.
if (flavorStr.EqualsLiteral(kFilePromiseMime)) {
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = NS_ConvertUTF8toUTF16(flavorStr);
continue;
}
// Empty element, transfer only the flavor
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = nsString();
continue;
}
if (nsCOMPtr<nsISupportsString> text = do_QueryInterface(data)) {
nsAutoString dataAsString;
text->GetData(dataAsString);
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = dataAsString;
} else if (nsCOMPtr<nsISupportsCString> ctext = do_QueryInterface(data)) {
nsAutoCString dataAsString;
ctext->GetData(dataAsString);
Shmem dataAsShmem = ConvertToShmem(aChild, aParent, dataAsString);
if (!dataAsShmem.IsReadable() || !dataAsShmem.Size<char>()) {
continue;
}
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = std::move(dataAsShmem);
} else if (nsCOMPtr<nsIInputStream> stream = do_QueryInterface(data)) {
// Images to be pasted on the clipboard are nsIInputStreams
nsCString imageData;
NS_ConsumeStream(stream, UINT32_MAX, imageData);
Shmem imageDataShmem = ConvertToShmem(aChild, aParent, imageData);
if (!imageDataShmem.IsReadable() || !imageDataShmem.Size<char>()) {
continue;
}
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = std::move(imageDataShmem);
} else if (nsCOMPtr<imgIContainer> image = do_QueryInterface(data)) {
// Images to be placed on the clipboard are imgIContainers.
RefPtr<mozilla::gfx::SourceSurface> surface = image->GetFrame(
imgIContainer::FRAME_CURRENT,
imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY);
if (!surface) {
continue;
}
RefPtr<mozilla::gfx::DataSourceSurface> dataSurface =
surface->GetDataSurface();
if (!dataSurface) {
continue;
}
size_t length;
int32_t stride;
IShmemAllocator* allocator =
aChild ? static_cast<IShmemAllocator*>(aChild)
: static_cast<IShmemAllocator*>(aParent);
Maybe<Shmem> surfaceData =
GetSurfaceData(dataSurface, &length, &stride, allocator);
if (surfaceData.isNothing()) {
continue;
}
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
// Turn item->data() into an nsCString prior to accessing it.
item->data() = std::move(surfaceData.ref());
IPCDataTransferImage& imageDetails = item->imageDetails();
mozilla::gfx::IntSize size = dataSurface->GetSize();
imageDetails.width() = size.width;
imageDetails.height() = size.height;
imageDetails.stride() = stride;
imageDetails.format() = dataSurface->GetFormat();
} else {
// Otherwise, handle this as a file.
nsCOMPtr<BlobImpl> blobImpl;
if (nsCOMPtr<nsIFile> file = do_QueryInterface(data)) {
// If we can send this over as a blob, do so. Otherwise, we're
// responding to a sync message and the child can't process the blob
// constructor before processing our response, which would crash. In
// that case, hope that the caller is nsClipboardProxy::GetData,
// called from editor and send over images as raw data.
if (aInSyncMessage) {
nsAutoCString type;
if (IsFileImage(file, type)) {
nsAutoCString data;
SlurpFileToString(file, data);
Shmem dataAsShmem = ConvertToShmem(aChild, aParent, data);
if (!dataAsShmem.IsReadable() || !dataAsShmem.Size<char>()) {
continue;
}
IPCDataTransferItem* item =
aIPCDataTransfer->items().AppendElement();
item->flavor() = type;
item->data() = std::move(dataAsShmem);
}
continue;
}
if (aParent) {
bool isDir = false;
if (NS_SUCCEEDED(file->IsDirectory(&isDir)) && isDir) {
nsAutoString path;
if (NS_WARN_IF(NS_FAILED(file->GetPath(path)))) {
continue;
}
RefPtr<FileSystemSecurity> fss =
FileSystemSecurity::GetOrCreate();
fss->GrantAccessToContentProcess(aParent->ChildID(), path);
}
}
blobImpl = new FileBlobImpl(file);
IgnoredErrorResult rv;
// Ensure that file data is cached no that the content process
// has this data available to it when passed over:
blobImpl->GetSize(rv);
if (NS_WARN_IF(rv.Failed())) {
continue;
}
blobImpl->GetLastModified(rv);
if (NS_WARN_IF(rv.Failed())) {
continue;
}
} else {
if (aInSyncMessage) {
// Can't do anything.
continue;
}
blobImpl = do_QueryInterface(data);
}
if (blobImpl) {
IPCDataTransferData data;
IPCBlob ipcBlob;
// If we failed to create the blob actor, then this blob probably
// can't get the file size for the underlying file, ignore it for
// now. TODO pass this through anyway.
if (aChild) {
nsresult rv = IPCBlobUtils::Serialize(blobImpl, aChild, ipcBlob);
if (NS_WARN_IF(NS_FAILED(rv))) {
continue;
}
data = ipcBlob;
} else if (aParent) {
nsresult rv = IPCBlobUtils::Serialize(blobImpl, aParent, ipcBlob);
if (NS_WARN_IF(NS_FAILED(rv))) {
continue;
}
data = ipcBlob;
}
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = data;
}
}
}
}
}
namespace {
// The default type used for calling GetSurfaceData(). Gets surface data as
// raw buffer.
struct GetSurfaceDataRawBuffer {
using ReturnType = mozilla::UniquePtr<char[]>;
using BufferType = char*;
ReturnType Allocate(size_t aSize) { return ReturnType(new char[aSize]); }
static BufferType GetBuffer(const ReturnType& aReturnValue) {
return aReturnValue.get();
}
static ReturnType NullValue() { return ReturnType(); }
};
// The type used for calling GetSurfaceData() that allocates and writes to
// a shared memory buffer.
struct GetSurfaceDataShmem {
using ReturnType = Maybe<Shmem>;
using BufferType = char*;
explicit GetSurfaceDataShmem(IShmemAllocator* aAllocator)
: mAllocator(aAllocator) {}
ReturnType Allocate(size_t aSize) {
Shmem shmem;
if (!mAllocator->AllocShmem(aSize, SharedMemory::TYPE_BASIC, &shmem)) {
return Nothing();
}
return Some(shmem);
}
static BufferType GetBuffer(const ReturnType& aReturnValue) {
return aReturnValue.isSome() ? aReturnValue.ref().get<char>() : nullptr;
}
static ReturnType NullValue() { return ReturnType(); }
private:
IShmemAllocator* mAllocator;
};
/*
* Get the pixel data from the given source surface and return it as a buffer.
* The length and stride will be assigned from the surface.
*/
template <typename GetSurfaceDataContext = GetSurfaceDataRawBuffer>
typename GetSurfaceDataContext::ReturnType GetSurfaceDataImpl(
mozilla::gfx::DataSourceSurface* aSurface, size_t* aLength,
int32_t* aStride,
GetSurfaceDataContext aContext = GetSurfaceDataContext()) {
mozilla::gfx::DataSourceSurface::MappedSurface map;
if (!aSurface->Map(mozilla::gfx::DataSourceSurface::MapType::READ, &map)) {
return GetSurfaceDataContext::NullValue();
}
size_t bufLen = 0;
size_t maxBufLen = 0;
nsresult rv = nsContentUtils::CalculateBufferSizeForImage(
map.mStride, aSurface->GetSize(), aSurface->GetFormat(), &maxBufLen,
&bufLen);
if (NS_FAILED(rv)) {
aSurface->Unmap();
return GetSurfaceDataContext::NullValue();
}
// nsDependentCString wants null-terminated string.
typename GetSurfaceDataContext::ReturnType surfaceData =
aContext.Allocate(maxBufLen + 1);
if (GetSurfaceDataContext::GetBuffer(surfaceData)) {
memcpy(GetSurfaceDataContext::GetBuffer(surfaceData),
reinterpret_cast<char*>(map.mData), bufLen);
memset(GetSurfaceDataContext::GetBuffer(surfaceData) + bufLen, 0,
maxBufLen - bufLen + 1);
}
*aLength = maxBufLen;
*aStride = map.mStride;
aSurface->Unmap();
return surfaceData;
}
} // Anonymous namespace.
mozilla::UniquePtr<char[]> nsContentUtils::GetSurfaceData(
NotNull<mozilla::gfx::DataSourceSurface*> aSurface, size_t* aLength,
int32_t* aStride) {
return GetSurfaceDataImpl(aSurface, aLength, aStride);
}
Maybe<Shmem> nsContentUtils::GetSurfaceData(
mozilla::gfx::DataSourceSurface* aSurface, size_t* aLength,
int32_t* aStride, IShmemAllocator* aAllocator) {
return GetSurfaceDataImpl(aSurface, aLength, aStride,
GetSurfaceDataShmem(aAllocator));
}
mozilla::Modifiers nsContentUtils::GetWidgetModifiers(int32_t aModifiers) {
Modifiers result = 0;
if (aModifiers & nsIDOMWindowUtils::MODIFIER_SHIFT) {
result |= mozilla::MODIFIER_SHIFT;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_CONTROL) {
result |= mozilla::MODIFIER_CONTROL;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_ALT) {
result |= mozilla::MODIFIER_ALT;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_META) {
result |= mozilla::MODIFIER_META;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_ALTGRAPH) {
result |= mozilla::MODIFIER_ALTGRAPH;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_CAPSLOCK) {
result |= mozilla::MODIFIER_CAPSLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_FN) {
result |= mozilla::MODIFIER_FN;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_FNLOCK) {
result |= mozilla::MODIFIER_FNLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_NUMLOCK) {
result |= mozilla::MODIFIER_NUMLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_SCROLLLOCK) {
result |= mozilla::MODIFIER_SCROLLLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_SYMBOL) {
result |= mozilla::MODIFIER_SYMBOL;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_SYMBOLLOCK) {
result |= mozilla::MODIFIER_SYMBOLLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_OS) {
result |= mozilla::MODIFIER_OS;
}
return result;
}
nsIWidget* nsContentUtils::GetWidget(PresShell* aPresShell, nsPoint* aOffset) {
if (!aPresShell) {
return nullptr;
}
nsIFrame* frame = aPresShell->GetRootFrame();
if (!frame) {
return nullptr;
}
return frame->GetView()->GetNearestWidget(aOffset);
}
int16_t nsContentUtils::GetButtonsFlagForButton(int32_t aButton) {
switch (aButton) {
case -1:
return MouseButtonsFlag::eNoButtons;
case MouseButton::ePrimary:
return MouseButtonsFlag::ePrimaryFlag;
case MouseButton::eMiddle:
return MouseButtonsFlag::eMiddleFlag;
case MouseButton::eSecondary:
return MouseButtonsFlag::eSecondaryFlag;
case 3:
return MouseButtonsFlag::e4thFlag;
case 4:
return MouseButtonsFlag::e5thFlag;
case MouseButton::eEraser:
return MouseButtonsFlag::eEraserFlag;
default:
NS_ERROR("Button not known.");
return 0;
}
}
LayoutDeviceIntPoint nsContentUtils::ToWidgetPoint(
const CSSPoint& aPoint, const nsPoint& aOffset,
nsPresContext* aPresContext) {
nsPoint layoutRelative = CSSPoint::ToAppUnits(aPoint) + aOffset;
nsPoint visualRelative =
ViewportUtils::LayoutToVisual(layoutRelative, aPresContext->PresShell());
return LayoutDeviceIntPoint::FromAppUnitsRounded(
visualRelative, aPresContext->AppUnitsPerDevPixel());
}
nsView* nsContentUtils::GetViewToDispatchEvent(nsPresContext* aPresContext,
PresShell** aPresShell) {
if (!aPresContext || !aPresShell) {
return nullptr;
}
RefPtr<PresShell> presShell = aPresContext->PresShell();
if (NS_WARN_IF(!presShell)) {
*aPresShell = nullptr;
return nullptr;
}
nsViewManager* viewManager = presShell->GetViewManager();
if (!viewManager) {
presShell.forget(aPresShell); // XXX Is this intentional?
return nullptr;
}
presShell.forget(aPresShell);
return viewManager->GetRootView();
}
nsresult nsContentUtils::SendMouseEvent(
mozilla::PresShell* aPresShell, const nsAString& aType, float aX, float aY,
int32_t aButton, int32_t aButtons, int32_t aClickCount, int32_t aModifiers,
bool aIgnoreRootScrollFrame, float aPressure,
unsigned short aInputSourceArg, uint32_t aIdentifier, bool aToWindow,
PreventDefaultResult* aPreventDefault, bool aIsDOMEventSynthesized,
bool aIsWidgetEventSynthesized) {
nsPoint offset;
nsCOMPtr<nsIWidget> widget = GetWidget(aPresShell, &offset);
if (!widget) return NS_ERROR_FAILURE;
EventMessage msg;
Maybe<WidgetMouseEvent::ExitFrom> exitFrom;
bool contextMenuKey = false;
if (aType.EqualsLiteral("mousedown")) {
msg = eMouseDown;
} else if (aType.EqualsLiteral("mouseup")) {
msg = eMouseUp;
} else if (aType.EqualsLiteral("mousemove")) {
msg = eMouseMove;
} else if (aType.EqualsLiteral("mouseover")) {
msg = eMouseEnterIntoWidget;
} else if (aType.EqualsLiteral("mouseout")) {
msg = eMouseExitFromWidget;
exitFrom = Some(WidgetMouseEvent::ePlatformChild);
} else if (aType.EqualsLiteral("mousecancel")) {
msg = eMouseExitFromWidget;
exitFrom = Some(XRE_IsParentProcess() ? WidgetMouseEvent::ePlatformTopLevel
: WidgetMouseEvent::ePuppet);
} else if (aType.EqualsLiteral("mouselongtap")) {
msg = eMouseLongTap;
} else if (aType.EqualsLiteral("contextmenu")) {
msg = eContextMenu;
contextMenuKey = (aButton == 0);
} else if (aType.EqualsLiteral("MozMouseHittest")) {
msg = eMouseHitTest;
} else {
return NS_ERROR_FAILURE;
}
if (aInputSourceArg == MouseEvent_Binding::MOZ_SOURCE_UNKNOWN) {
aInputSourceArg = MouseEvent_Binding::MOZ_SOURCE_MOUSE;
}
WidgetMouseEvent event(true, msg, widget,
aIsWidgetEventSynthesized
? WidgetMouseEvent::eSynthesized
: WidgetMouseEvent::eReal,
contextMenuKey ? WidgetMouseEvent::eContextMenuKey
: WidgetMouseEvent::eNormal);
event.pointerId = aIdentifier;
event.mModifiers = GetWidgetModifiers(aModifiers);
event.mButton = aButton;
event.mButtons = aButtons != nsIDOMWindowUtils::MOUSE_BUTTONS_NOT_SPECIFIED
? aButtons
: msg == eMouseUp ? 0
: GetButtonsFlagForButton(aButton);
event.mPressure = aPressure;
event.mInputSource = aInputSourceArg;
event.mClickCount = aClickCount;
event.mTime = PR_IntervalNow();
event.mFlags.mIsSynthesizedForTests = aIsDOMEventSynthesized;
event.mExitFrom = exitFrom;
nsPresContext* presContext = aPresShell->GetPresContext();
if (!presContext) return NS_ERROR_FAILURE;
event.mRefPoint = ToWidgetPoint(CSSPoint(aX, aY), offset, presContext);
event.mIgnoreRootScrollFrame = aIgnoreRootScrollFrame;
nsEventStatus status = nsEventStatus_eIgnore;
if (aToWindow) {
RefPtr<PresShell> presShell;
nsView* view =
GetViewToDispatchEvent(presContext, getter_AddRefs(presShell));
if (!presShell || !view) {
return NS_ERROR_FAILURE;
}
return presShell->HandleEvent(view->GetFrame(), &event, false, &status);
}
if (StaticPrefs::test_events_async_enabled()) {
status = widget->DispatchInputEvent(&event).mContentStatus;
} else {
nsresult rv = widget->DispatchEvent(&event, status);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aPreventDefault) {
if (status == nsEventStatus_eConsumeNoDefault) {
if (event.mFlags.mDefaultPreventedByContent) {
*aPreventDefault = PreventDefaultResult::ByContent;
} else {
*aPreventDefault = PreventDefaultResult::ByChrome;
}
} else {
*aPreventDefault = PreventDefaultResult::No;
}
}
return NS_OK;
}
/* static */
void nsContentUtils::FirePageHideEventForFrameLoaderSwap(
nsIDocShellTreeItem* aItem, EventTarget* aChromeEventHandler,
bool aOnlySystemGroup) {
MOZ_DIAGNOSTIC_ASSERT(aItem);
MOZ_DIAGNOSTIC_ASSERT(aChromeEventHandler);
RefPtr<Document> doc = aItem->GetDocument();
NS_ASSERTION(doc, "What happened here?");
doc->OnPageHide(true, aChromeEventHandler, aOnlySystemGroup);
int32_t childCount = 0;
aItem->GetInProcessChildCount(&childCount);
AutoTArray<nsCOMPtr<nsIDocShellTreeItem>, 8> kids;
kids.AppendElements(childCount);
for (int32_t i = 0; i < childCount; ++i) {
aItem->GetInProcessChildAt(i, getter_AddRefs(kids[i]));
}
for (uint32_t i = 0; i < kids.Length(); ++i) {
if (kids[i]) {
FirePageHideEventForFrameLoaderSwap(kids[i], aChromeEventHandler,
aOnlySystemGroup);
}
}
}
// The pageshow event is fired for a given document only if IsShowing() returns
// the same thing as aFireIfShowing. This gives us a way to fire pageshow only
// on documents that are still loading or only on documents that are already
// loaded.
/* static */
void nsContentUtils::FirePageShowEventForFrameLoaderSwap(
nsIDocShellTreeItem* aItem, EventTarget* aChromeEventHandler,
bool aFireIfShowing, bool aOnlySystemGroup) {
int32_t childCount = 0;
aItem->GetInProcessChildCount(&childCount);
AutoTArray<nsCOMPtr<nsIDocShellTreeItem>, 8> kids;
kids.AppendElements(childCount);
for (int32_t i = 0; i < childCount; ++i) {
aItem->GetInProcessChildAt(i, getter_AddRefs(kids[i]));
}
for (uint32_t i = 0; i < kids.Length(); ++i) {
if (kids[i]) {
FirePageShowEventForFrameLoaderSwap(kids[i], aChromeEventHandler,
aFireIfShowing, aOnlySystemGroup);
}
}
RefPtr<Document> doc = aItem->GetDocument();
NS_ASSERTION(doc, "What happened here?");
if (doc->IsShowing() == aFireIfShowing) {
doc->OnPageShow(true, aChromeEventHandler, aOnlySystemGroup);
}
}
/* static */
already_AddRefed<nsPIWindowRoot> nsContentUtils::GetWindowRoot(Document* aDoc) {
if (aDoc) {
if (nsPIDOMWindowOuter* win = aDoc->GetWindow()) {
return win->GetTopWindowRoot();
}
}
return nullptr;
}
/* static */
bool nsContentUtils::IsPreloadType(nsContentPolicyType aType) {
return (aType == nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD ||
aType == nsIContentPolicy::TYPE_INTERNAL_MODULE_PRELOAD ||
aType == nsIContentPolicy::TYPE_INTERNAL_IMAGE_PRELOAD ||
aType == nsIContentPolicy::TYPE_INTERNAL_STYLESHEET_PRELOAD ||
aType == nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD ||
aType == nsIContentPolicy::TYPE_INTERNAL_FETCH_PRELOAD);
}
/* static */
bool nsContentUtils::IsUpgradableDisplayType(ExtContentPolicyType aType) {
MOZ_ASSERT(NS_IsMainThread());
return (aType == ExtContentPolicy::TYPE_IMAGE ||
aType == ExtContentPolicy::TYPE_MEDIA);
}
// static
ReferrerPolicy nsContentUtils::GetReferrerPolicyFromChannel(
nsIChannel* aChannel) {
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel);
if (!httpChannel) {
return ReferrerPolicy::_empty;
}
nsresult rv;
nsAutoCString headerValue;
rv = httpChannel->GetResponseHeader("referrer-policy"_ns, headerValue);
if (NS_FAILED(rv) || headerValue.IsEmpty()) {
return ReferrerPolicy::_empty;
}
return ReferrerInfo::ReferrerPolicyFromHeaderString(
NS_ConvertUTF8toUTF16(headerValue));
}
// static
bool nsContentUtils::IsNonSubresourceRequest(nsIChannel* aChannel) {
nsLoadFlags loadFlags = 0;
aChannel->GetLoadFlags(&loadFlags);
if (loadFlags & nsIChannel::LOAD_DOCUMENT_URI) {
return true;
}
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
nsContentPolicyType type = loadInfo->InternalContentPolicyType();
return IsNonSubresourceInternalPolicyType(type);
}
// static
bool nsContentUtils::IsNonSubresourceInternalPolicyType(
nsContentPolicyType aType) {
return aType == nsIContentPolicy::TYPE_DOCUMENT ||
aType == nsIContentPolicy::TYPE_INTERNAL_IFRAME ||
aType == nsIContentPolicy::TYPE_INTERNAL_FRAME ||
aType == nsIContentPolicy::TYPE_INTERNAL_WORKER ||
aType == nsIContentPolicy::TYPE_INTERNAL_SHARED_WORKER;
}
// static public
bool nsContentUtils::IsThirdPartyTrackingResourceWindow(
nsPIDOMWindowInner* aWindow) {
MOZ_ASSERT(aWindow);
Document* document = aWindow->GetExtantDoc();
if (!document) {
return false;
}
nsCOMPtr<nsIClassifiedChannel> classifiedChannel =
do_QueryInterface(document->GetChannel());
if (!classifiedChannel) {
return false;
}
return classifiedChannel->IsThirdPartyTrackingResource();
}
// static public
bool nsContentUtils::IsFirstPartyTrackingResourceWindow(
nsPIDOMWindowInner* aWindow) {
MOZ_ASSERT(aWindow);
Document* document = aWindow->GetExtantDoc();
if (!document) {
return false;
}
nsCOMPtr<nsIClassifiedChannel> classifiedChannel =
do_QueryInterface(document->GetChannel());
if (!classifiedChannel) {
return false;
}
uint32_t classificationFlags =
classifiedChannel->GetFirstPartyClassificationFlags();
return mozilla::net::UrlClassifierCommon::IsTrackingClassificationFlag(
classificationFlags);
}
namespace {
// We put StringBuilder in the anonymous namespace to prevent anything outside
// this file from accidentally being linked against it.
class BulkAppender {
using size_type = typename nsAString::size_type;
public:
explicit BulkAppender(BulkWriteHandle<char16_t>&& aHandle)
: mHandle(std::move(aHandle)), mPosition(0) {}
~BulkAppender() = default;
template <int N>
void AppendLiteral(const char16_t (&aStr)[N]) {
size_t len = N - 1;
MOZ_ASSERT(mPosition + len <= mHandle.Length());
memcpy(mHandle.Elements() + mPosition, aStr, len * sizeof(char16_t));
mPosition += len;
}
void Append(Span<const char16_t> aStr) {
size_t len = aStr.Length();
MOZ_ASSERT(mPosition + len <= mHandle.Length());
// Both mHandle.Elements() and aStr.Elements() are guaranteed
// to be non-null (by the string implementation and by Span,
// respectively), so not checking the pointers for null before
// memcpy does not lead to UB even if len was zero.
memcpy(mHandle.Elements() + mPosition, aStr.Elements(),
len * sizeof(char16_t));
mPosition += len;
}
void Append(Span<const char> aStr) {
size_t len = aStr.Length();
MOZ_ASSERT(mPosition + len <= mHandle.Length());
ConvertLatin1toUtf16(aStr, mHandle.AsSpan().From(mPosition));
mPosition += len;
}
void Finish() { mHandle.Finish(mPosition, false); }
private:
mozilla::BulkWriteHandle<char16_t> mHandle;
size_type mPosition;
};
class StringBuilder {
private:
// Try to keep the size of StringBuilder close to a jemalloc bucket size.
static const uint32_t STRING_BUFFER_UNITS = 1020;
class Unit {
public:
Unit() : mAtom(nullptr), mType(eUnknown), mLength(0) {
MOZ_COUNT_CTOR(StringBuilder::Unit);
}
~Unit() {
if (mType == eString || mType == eStringWithEncode) {
delete mString;
}
MOZ_COUNT_DTOR(StringBuilder::Unit);
}
enum Type {
eUnknown,
eAtom,
eString,
eStringWithEncode,
eLiteral,
eTextFragment,
eTextFragmentWithEncode,
};
union {
nsAtom* mAtom;
const char16_t* mLiteral;
nsAutoString* mString;
const nsTextFragment* mTextFragment;
};
Type mType;
uint32_t mLength;
};
public:
StringBuilder() : mLast(this), mLength(0) { MOZ_COUNT_CTOR(StringBuilder); }
MOZ_COUNTED_DTOR(StringBuilder)
void Append(nsAtom* aAtom) {
Unit* u = AddUnit();
u->mAtom = aAtom;
u->mType = Unit::eAtom;
uint32_t len = aAtom->GetLength();
u->mLength = len;
mLength += len;
}
template <int N>
void Append(const char16_t (&aLiteral)[N]) {
Unit* u = AddUnit();
u->mLiteral = aLiteral;
u->mType = Unit::eLiteral;
uint32_t len = N - 1;
u->mLength = len;
mLength += len;
}
void Append(const nsAString& aString) {
Unit* u = AddUnit();
u->mString = new nsAutoString(aString);
u->mType = Unit::eString;
uint32_t len = aString.Length();
u->mLength = len;
mLength += len;
}
void Append(nsAutoString* aString) {
Unit* u = AddUnit();
u->mString = aString;
u->mType = Unit::eString;
uint32_t len = aString->Length();
u->mLength = len;
mLength += len;
}
void AppendWithAttrEncode(nsAutoString* aString, uint32_t aLen) {
Unit* u = AddUnit();
u->mString = aString;
u->mType = Unit::eStringWithEncode;
u->mLength = aLen;
mLength += aLen;
}
void Append(const nsTextFragment* aTextFragment) {
Unit* u = AddUnit();
u->mTextFragment = aTextFragment;
u->mType = Unit::eTextFragment;
uint32_t len = aTextFragment->GetLength();
u->mLength = len;
mLength += len;
}
void AppendWithEncode(const nsTextFragment* aTextFragment, uint32_t aLen) {
Unit* u = AddUnit();
u->mTextFragment = aTextFragment;
u->mType = Unit::eTextFragmentWithEncode;
u->mLength = aLen;
mLength += aLen;
}
bool ToString(nsAString& aOut) {
if (!mLength.isValid()) {
return false;
}
auto appenderOrErr = aOut.BulkWrite(mLength.value(), 0, true);
if (appenderOrErr.isErr()) {
return false;
}
BulkAppender appender{appenderOrErr.unwrap()};
for (StringBuilder* current = this; current;
current = current->mNext.get()) {
uint32_t len = current->mUnits.Length();
for (uint32_t i = 0; i < len; ++i) {
Unit& u = current->mUnits[i];
switch (u.mType) {
case Unit::eAtom:
appender.Append(*(u.mAtom));
break;
case Unit::eString:
appender.Append(*(u.mString));
break;
case Unit::eStringWithEncode:
EncodeAttrString(*(u.mString), appender);
break;
case Unit::eLiteral:
appender.Append(Span(u.mLiteral, u.mLength));
break;
case Unit::eTextFragment:
if (u.mTextFragment->Is2b()) {
appender.Append(
Span(u.mTextFragment->Get2b(), u.mTextFragment->GetLength()));
} else {
appender.Append(
Span(u.mTextFragment->Get1b(), u.mTextFragment->GetLength()));
}
break;
case Unit::eTextFragmentWithEncode:
if (u.mTextFragment->Is2b()) {
EncodeTextFragment(
Span(u.mTextFragment->Get2b(), u.mTextFragment->GetLength()),
appender);
} else {
EncodeTextFragment(
Span(u.mTextFragment->Get1b(), u.mTextFragment->GetLength()),
appender);
}
break;
default:
MOZ_CRASH("Unknown unit type?");
}
}
}
appender.Finish();
return true;
}
private:
Unit* AddUnit() {
if (mLast->mUnits.Length() == STRING_BUFFER_UNITS) {
new StringBuilder(this);
}
return mLast->mUnits.AppendElement();
}
explicit StringBuilder(StringBuilder* aFirst) : mLast(nullptr), mLength(0) {
MOZ_COUNT_CTOR(StringBuilder);
aFirst->mLast->mNext = WrapUnique(this);
aFirst->mLast = this;
}
void EncodeAttrString(Span<const char16_t> aStr, BulkAppender& aAppender) {
size_t flushedUntil = 0;
size_t currentPosition = 0;
for (char16_t c : aStr) {
switch (c) {
case '"':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&quot;");
flushedUntil = currentPosition + 1;
break;
case '&':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&amp;");
flushedUntil = currentPosition + 1;
break;
case 0x00A0:
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&nbsp;");
flushedUntil = currentPosition + 1;
break;
default:
break;
}
currentPosition++;
}
if (currentPosition > flushedUntil) {
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
}
}
template <class T>
void EncodeTextFragment(Span<const T> aStr, BulkAppender& aAppender) {
size_t flushedUntil = 0;
size_t currentPosition = 0;
for (T c : aStr) {
switch (c) {
case '<':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&lt;");
flushedUntil = currentPosition + 1;
break;
case '>':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&gt;");
flushedUntil = currentPosition + 1;
break;
case '&':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&amp;");
flushedUntil = currentPosition + 1;
break;
case T(0xA0):
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&nbsp;");
flushedUntil = currentPosition + 1;
break;
default:
break;
}
currentPosition++;
}
if (currentPosition > flushedUntil) {
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
}
}
AutoTArray<Unit, STRING_BUFFER_UNITS> mUnits;
mozilla::UniquePtr<StringBuilder> mNext;
StringBuilder* mLast;
// mLength is used only in the first StringBuilder object in the linked list.
CheckedInt<uint32_t> mLength;
};
} // namespace
static void AppendEncodedCharacters(const nsTextFragment* aText,
StringBuilder& aBuilder) {
uint32_t extraSpaceNeeded = 0;
uint32_t len = aText->GetLength();
if (aText->Is2b()) {
const char16_t* data = aText->Get2b();
for (uint32_t i = 0; i < len; ++i) {
const char16_t c = data[i];
switch (c) {
case '<':
extraSpaceNeeded += ArrayLength("&lt;") - 2;
break;
case '>':
extraSpaceNeeded += ArrayLength("&gt;") - 2;
break;
case '&':
extraSpaceNeeded += ArrayLength("&amp;") - 2;
break;
case 0x00A0:
extraSpaceNeeded += ArrayLength("&nbsp;") - 2;
break;
default:
break;
}
}
} else {
const char* data = aText->Get1b();
for (uint32_t i = 0; i < len; ++i) {
const unsigned char c = data[i];
switch (c) {
case '<':
extraSpaceNeeded += ArrayLength("&lt;") - 2;
break;
case '>':
extraSpaceNeeded += ArrayLength("&gt;") - 2;
break;
case '&':
extraSpaceNeeded += ArrayLength("&amp;") - 2;
break;
case 0x00A0:
extraSpaceNeeded += ArrayLength("&nbsp;") - 2;
break;
default:
break;
}
}
}
if (extraSpaceNeeded) {
aBuilder.AppendWithEncode(aText, len + extraSpaceNeeded);
} else {
aBuilder.Append(aText);
}
}
static void AppendEncodedAttributeValue(nsAutoString* aValue,
StringBuilder& aBuilder) {
const char16_t* c = aValue->BeginReading();
const char16_t* end = aValue->EndReading();
uint32_t extraSpaceNeeded = 0;
while (c < end) {
switch (*c) {
case '"':
extraSpaceNeeded += ArrayLength("&quot;") - 2;
break;
case '&':
extraSpaceNeeded += ArrayLength("&amp;") - 2;
break;
case 0x00A0:
extraSpaceNeeded += ArrayLength("&nbsp;") - 2;
break;
default:
break;
}
++c;
}
if (extraSpaceNeeded) {
aBuilder.AppendWithAttrEncode(aValue, aValue->Length() + extraSpaceNeeded);
} else {
aBuilder.Append(aValue);
}
}
static void StartElement(Element* aContent, StringBuilder& aBuilder) {
nsAtom* localName = aContent->NodeInfo()->NameAtom();
int32_t tagNS = aContent->GetNameSpaceID();
aBuilder.Append(u"<");
if (aContent->IsHTMLElement() || aContent->IsSVGElement() ||
aContent->IsMathMLElement()) {
aBuilder.Append(localName);
} else {
aBuilder.Append(aContent->NodeName());
}
CustomElementData* ceData = aContent->GetCustomElementData();
if (ceData) {
nsAtom* isAttr = ceData->GetIs(aContent);
if (isAttr && !aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::is)) {
aBuilder.Append(uR"( is=")");
aBuilder.Append(nsDependentAtomString(isAttr));
aBuilder.Append(uR"(")");
}
}
int32_t count = aContent->GetAttrCount();
for (int32_t i = 0; i < count; i++) {
const nsAttrName* name = aContent->GetAttrNameAt(i);
int32_t attNs = name->NamespaceID();
nsAtom* attName = name->LocalName();
// Filter out any attribute starting with [-|_]moz
nsDependentAtomString attrNameStr(attName);
if (StringBeginsWith(attrNameStr, u"_moz"_ns) ||
StringBeginsWith(attrNameStr, u"-moz"_ns)) {
continue;
}
auto* attValue = new nsAutoString();
aContent->GetAttr(attNs, attName, *attValue);
// Filter out special case of <br type="_moz*"> used by the editor.
// Bug 16988. Yuck.
if (localName == nsGkAtoms::br && tagNS == kNameSpaceID_XHTML &&
attName == nsGkAtoms::type && attNs == kNameSpaceID_None &&
StringBeginsWith(*attValue, u"_moz"_ns)) {
delete attValue;
continue;
}
aBuilder.Append(u" ");
if (MOZ_LIKELY(attNs == kNameSpaceID_None) ||
(attNs == kNameSpaceID_XMLNS && attName == nsGkAtoms::xmlns)) {
// Nothing else required
} else if (attNs == kNameSpaceID_XML) {
aBuilder.Append(u"xml:");
} else if (attNs == kNameSpaceID_XMLNS) {
aBuilder.Append(u"xmlns:");
} else if (attNs == kNameSpaceID_XLink) {
aBuilder.Append(u"xlink:");
} else {
nsAtom* prefix = name->GetPrefix();
if (prefix) {
aBuilder.Append(prefix);
aBuilder.Append(u":");
}
}
aBuilder.Append(attName);
aBuilder.Append(uR"(=")");
AppendEncodedAttributeValue(attValue, aBuilder);
aBuilder.Append(uR"(")");
}
aBuilder.Append(u">");
/*
// Per HTML spec we should append one \n if the first child of
// pre/textarea/listing is a textnode and starts with a \n.
// But because browsers haven't traditionally had that behavior,
// we're not changing our behavior either - yet.
if (aContent->IsHTMLElement()) {
if (localName == nsGkAtoms::pre || localName == nsGkAtoms::textarea ||
localName == nsGkAtoms::listing) {
nsIContent* fc = aContent->GetFirstChild();
if (fc &&
(fc->NodeType() == nsINode::TEXT_NODE ||
fc->NodeType() == nsINode::CDATA_SECTION_NODE)) {
const nsTextFragment* text = fc->GetText();
if (text && text->GetLength() && text->CharAt(0) == char16_t('\n')) {
aBuilder.Append("\n");
}
}
}
}*/
}
static inline bool ShouldEscape(nsIContent* aParent) {
if (!aParent || !aParent->IsHTMLElement()) {
return true;
}
static const nsAtom* nonEscapingElements[] = {
nsGkAtoms::style, nsGkAtoms::script, nsGkAtoms::xmp,
nsGkAtoms::iframe, nsGkAtoms::noembed, nsGkAtoms::noframes,
nsGkAtoms::plaintext, nsGkAtoms::noscript};
static mozilla::BitBloomFilter<12, nsAtom> sFilter;
static bool sInitialized = false;
if (!sInitialized) {
sInitialized = true;
for (auto& nonEscapingElement : nonEscapingElements) {
sFilter.add(nonEscapingElement);
}
}
nsAtom* tag = aParent->NodeInfo()->NameAtom();
if (sFilter.mightContain(tag)) {
for (auto& nonEscapingElement : nonEscapingElements) {
if (tag == nonEscapingElement) {
if (MOZ_UNLIKELY(tag == nsGkAtoms::noscript) &&
MOZ_UNLIKELY(!aParent->OwnerDoc()->IsScriptEnabled())) {
return true;
}
return false;
}
}
}
return true;
}
static inline bool IsVoidTag(Element* aElement) {
if (!aElement->IsHTMLElement()) {
return false;
}
return FragmentOrElement::IsHTMLVoid(aElement->NodeInfo()->NameAtom());
}
bool nsContentUtils::SerializeNodeToMarkup(nsINode* aRoot,
bool aDescendentsOnly,
nsAString& aOut) {
// If you pass in a DOCUMENT_NODE, you must pass aDescendentsOnly as true
MOZ_ASSERT(aDescendentsOnly || aRoot->NodeType() != nsINode::DOCUMENT_NODE);
nsINode* current =
aDescendentsOnly ? aRoot->GetFirstChildOfTemplateOrNode() : aRoot;
if (!current) {
return true;
}
StringBuilder builder;
nsIContent* next;
while (true) {
bool isVoid = false;
switch (current->NodeType()) {
case nsINode::ELEMENT_NODE: {
Element* elem = current->AsElement();
StartElement(elem, builder);
isVoid = IsVoidTag(elem);
if (!isVoid && (next = current->GetFirstChildOfTemplateOrNode())) {
current = next;
continue;
}
break;
}
case nsINode::TEXT_NODE:
case nsINode::CDATA_SECTION_NODE: {
const nsTextFragment* text = &current->AsText()->TextFragment();
nsIContent* parent = current->GetParent();
if (ShouldEscape(parent)) {
AppendEncodedCharacters(text, builder);
} else {
builder.Append(text);
}
break;
}
case nsINode::COMMENT_NODE: {
builder.Append(u"<!--");
builder.Append(static_cast<nsIContent*>(current)->GetText());
builder.Append(u"-->");
break;
}
case nsINode::DOCUMENT_TYPE_NODE: {
builder.Append(u"<!DOCTYPE ");
builder.Append(current->NodeName());
builder.Append(u">");
break;
}
case nsINode::PROCESSING_INSTRUCTION_NODE: {
builder.Append(u"<?");
builder.Append(current->NodeName());
builder.Append(u" ");
builder.Append(static_cast<nsIContent*>(current)->GetText());
builder.Append(u">");
break;
}
}
while (true) {
if (!isVoid && current->NodeType() == nsINode::ELEMENT_NODE) {
builder.Append(u"</");
nsIContent* elem = static_cast<nsIContent*>(current);
if (elem->IsHTMLElement() || elem->IsSVGElement() ||
elem->IsMathMLElement()) {
builder.Append(elem->NodeInfo()->NameAtom());
} else {
builder.Append(current->NodeName());
}
builder.Append(u">");
}
isVoid = false;
if (current == aRoot) {
return builder.ToString(aOut);
}
if ((next = current->GetNextSibling())) {
current = next;
break;
}
current = current->GetParentNode();
// Handle template element. If the parent is a template's content,
// then adjust the parent to be the template element.
if (current != aRoot &&
current->NodeType() == nsINode::DOCUMENT_FRAGMENT_NODE) {
DocumentFragment* frag = static_cast<DocumentFragment*>(current);
nsIContent* fragHost = frag->GetHost();
if (fragHost && fragHost->IsTemplateElement()) {
current = fragHost;
}
}
if (aDescendentsOnly && current == aRoot) {
return builder.ToString(aOut);
}
}
}
}
bool nsContentUtils::IsSpecificAboutPage(JSObject* aGlobal, const char* aUri) {
// aUri must start with about: or this isn't the right function to be using.
MOZ_ASSERT(strncmp(aUri, "about:", 6) == 0);
// Make sure the global is a window
MOZ_DIAGNOSTIC_ASSERT(JS_IsGlobalObject(aGlobal));
nsGlobalWindowInner* win = xpc::WindowOrNull(aGlobal);
if (!win) {
return false;
}
nsCOMPtr<nsIPrincipal> principal = win->GetPrincipal();
NS_ENSURE_TRUE(principal, false);
// First check the scheme to avoid getting long specs in the common case.
if (!principal->SchemeIs("about")) {
return false;
}
nsAutoCString spec;
principal->GetAsciiSpec(spec);
return spec.EqualsASCII(aUri);
}
/* static */
void nsContentUtils::SetScrollbarsVisibility(nsIDocShell* aDocShell,
bool aVisible) {
if (!aDocShell) {
return;
}
auto pref = aVisible ? ScrollbarPreference::Auto : ScrollbarPreference::Never;
nsDocShell::Cast(aDocShell)->SetScrollbarPreference(pref);
}
/* static */
nsIDocShell* nsContentUtils::GetDocShellForEventTarget(EventTarget* aTarget) {
if (!aTarget) {
return nullptr;
}
nsCOMPtr<nsPIDOMWindowInner> innerWindow;
if (nsCOMPtr<nsINode> node = nsINode::FromEventTarget(aTarget)) {
bool ignore;
innerWindow =
do_QueryInterface(node->OwnerDoc()->GetScriptHandlingObject(ignore));
} else if ((innerWindow = nsPIDOMWindowInner::FromEventTarget(aTarget))) {
// Nothing else to do
} else {
nsCOMPtr<DOMEventTargetHelper> helper = do_QueryInterface(aTarget);
if (helper) {
innerWindow = helper->GetOwner();
}
}
if (innerWindow) {
return innerWindow->GetDocShell();
}
return nullptr;
}
/*
* Note: this function only relates to figuring out HTTPS state, which is an
* input to the Secure Context algorithm. We are not actually implementing any
* part of the Secure Context algorithm itself here.
*
* This is a bit of a hack. Ideally we'd propagate HTTPS state through
* nsIChannel as described in the Fetch and HTML specs, but making channels
* know about whether they should inherit HTTPS state, propagating information
* about who the channel's "client" is, exposing GetHttpsState API on channels
* and modifying the various cache implementations to store and retrieve HTTPS
* state involves a huge amount of code (see bug 1220687). We avoid that for
* now using this function.
*
* This function takes advantage of the observation that we can return true if
* nsIContentSecurityManager::IsOriginPotentiallyTrustworthy returns true for
* the document's origin (e.g. the origin has a scheme of 'https' or host
* 'localhost' etc.). Since we generally propagate a creator document's origin
* onto data:, blob:, etc. documents, this works for them too.
*
* The scenario where this observation breaks down is sandboxing without the
* 'allow-same-origin' flag, since in this case a document is given a unique
* origin (IsOriginPotentiallyTrustworthy would return false). We handle that
* by using the origin that the document would have had had it not been
* sandboxed.
*
* DEFICIENCIES: Note that this function uses nsIScriptSecurityManager's
* getChannelResultPrincipalIfNotSandboxed, and that method's ignoring of
* sandboxing is limited to the immediate sandbox. In the case that aDocument
* should inherit its origin (e.g. data: URI) but its parent has ended up
* with a unique origin due to sandboxing further up the parent chain we may
* end up returning false when we would ideally return true (since we will
* examine the parent's origin for 'https' and not finding it.) This means
* that we may restrict the privileges of some pages unnecessarily in this
* edge case.
*/
/* static */
bool nsContentUtils::HttpsStateIsModern(Document* aDocument) {
if (!aDocument) {
return false;
}
nsCOMPtr<nsIPrincipal> principal = aDocument->NodePrincipal();
if (principal->IsSystemPrincipal()) {
return true;
}
// If aDocument is sandboxed, try and get the principal that it would have
// been given had it not been sandboxed:
if (principal->GetIsNullPrincipal() &&
(aDocument->GetSandboxFlags() & SANDBOXED_ORIGIN)) {
nsIChannel* channel = aDocument->GetChannel();
if (channel) {
nsCOMPtr<nsIScriptSecurityManager> ssm =
nsContentUtils::GetSecurityManager();
nsresult rv = ssm->GetChannelResultPrincipalIfNotSandboxed(
channel, getter_AddRefs(principal));
if (NS_FAILED(rv)) {
return false;
}
if (principal->IsSystemPrincipal()) {
// If a document with the system principal is sandboxing a subdocument
// that would normally inherit the embedding element's principal (e.g.
// a srcdoc document) then the embedding document does not trust the
// content that is written to the embedded document. Unlike when the
// embedding document is https, in this case we have no indication as
// to whether the embedded document's contents are delivered securely
// or not, and the sandboxing would possibly indicate that they were
// not. To play it safe we return false here. (See bug 1162772
// comment 73-80.)
return false;
}
}
}
if (principal->GetIsNullPrincipal()) {
return false;
}
MOZ_ASSERT(principal->GetIsContentPrincipal());
return principal->GetIsOriginPotentiallyTrustworthy();
}
/* static */
bool nsContentUtils::ComputeIsSecureContext(nsIChannel* aChannel) {
MOZ_ASSERT(aChannel);
nsCOMPtr<nsIScriptSecurityManager> ssm = nsContentUtils::GetSecurityManager();
nsCOMPtr<nsIPrincipal> principal;
nsresult rv = ssm->GetChannelResultPrincipalIfNotSandboxed(
aChannel, getter_AddRefs(principal));
if (NS_FAILED(rv)) {
return false;
}
const RefPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
if (principal->IsSystemPrincipal()) {
// If the load would've been sandboxed, treat this load as an untrusted
// load, as system code considers sandboxed resources insecure.
return !loadInfo->GetLoadingSandboxed();
}
if (principal->GetIsNullPrincipal()) {
return false;
}
if (const RefPtr<WindowContext> windowContext =
WindowContext::GetById(loadInfo->GetInnerWindowID())) {
if (!windowContext->GetIsSecureContext()) {
return false;
}
}
return principal->GetIsOriginPotentiallyTrustworthy();
}
/* static */
void nsContentUtils::TryToUpgradeElement(Element* aElement) {
NodeInfo* nodeInfo = aElement->NodeInfo();
RefPtr<nsAtom> typeAtom =
aElement->GetCustomElementData()->GetCustomElementType();
MOZ_ASSERT(nodeInfo->NameAtom()->Equals(nodeInfo->LocalName()));
CustomElementDefinition* definition =
nsContentUtils::LookupCustomElementDefinition(
nodeInfo->GetDocument(), nodeInfo->NameAtom(),
nodeInfo->NamespaceID(), typeAtom);
if (definition) {
nsContentUtils::EnqueueUpgradeReaction(aElement, definition);
} else {
// Add an unresolved custom element that is a candidate for upgrade when a
// custom element is connected to the document.
nsContentUtils::RegisterUnresolvedElement(aElement, typeAtom);
}
}
MOZ_CAN_RUN_SCRIPT
static void DoCustomElementCreate(Element** aElement, JSContext* aCx,
Document* aDoc, NodeInfo* aNodeInfo,
CustomElementConstructor* aConstructor,
ErrorResult& aRv) {
JS::Rooted<JS::Value> constructResult(aCx);
aConstructor->Construct(&constructResult, aRv, "Custom Element Create",
CallbackFunction::eRethrowExceptions);
if (aRv.Failed()) {
return;
}
RefPtr<Element> element;
// constructResult is an ObjectValue because construction with a callback
// always forms the return value from a JSObject.
UNWRAP_OBJECT(Element, &constructResult, element);
if (aNodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
if (!element || !element->IsHTMLElement()) {
aRv.ThrowTypeError<MSG_DOES_NOT_IMPLEMENT_INTERFACE>("\"this\"",
"HTMLElement");
return;
}
} else {
if (!element || !element->IsXULElement()) {
aRv.ThrowTypeError<MSG_DOES_NOT_IMPLEMENT_INTERFACE>("\"this\"",
"XULElement");
return;
}
}
nsAtom* localName = aNodeInfo->NameAtom();
if (aDoc != element->OwnerDoc() || element->GetParentNode() ||
element->HasChildren() || element->GetAttrCount() ||
element->NodeInfo()->NameAtom() != localName) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
element.forget(aElement);
}
/* static */
nsresult nsContentUtils::NewXULOrHTMLElement(
Element** aResult, mozilla::dom::NodeInfo* aNodeInfo,
FromParser aFromParser, nsAtom* aIsAtom,
mozilla::dom::CustomElementDefinition* aDefinition) {
RefPtr<mozilla::dom::NodeInfo> nodeInfo = aNodeInfo;
MOZ_ASSERT(nodeInfo->NamespaceEquals(kNameSpaceID_XHTML) ||
nodeInfo->NamespaceEquals(kNameSpaceID_XUL),
"Can only create XUL or XHTML elements.");
nsAtom* name = nodeInfo->NameAtom();
int32_t tag = eHTMLTag_unknown;
bool isCustomElementName = false;
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
tag = nsHTMLTags::CaseSensitiveAtomTagToId(name);
isCustomElementName =
(tag == eHTMLTag_userdefined &&
nsContentUtils::IsCustomElementName(name, kNameSpaceID_XHTML));
} else { // kNameSpaceID_XUL
if (aIsAtom) {
// Make sure the customized built-in element to be constructed confirms
// to our naming requirement, i.e. [is] must be a dashed name and
// the tag name must not.
// if so, set isCustomElementName to false to kick off all the logics
// that pick up aIsAtom.
if (nsContentUtils::IsNameWithDash(aIsAtom) &&
!nsContentUtils::IsNameWithDash(name)) {
isCustomElementName = false;
} else {
isCustomElementName =
nsContentUtils::IsCustomElementName(name, kNameSpaceID_XUL);
}
} else {
isCustomElementName =
nsContentUtils::IsCustomElementName(name, kNameSpaceID_XUL);
}
}
nsAtom* tagAtom = nodeInfo->NameAtom();
nsAtom* typeAtom = nullptr;
bool isCustomElement = isCustomElementName || aIsAtom;
if (isCustomElement) {
typeAtom = isCustomElementName ? tagAtom : aIsAtom;
}
MOZ_ASSERT_IF(aDefinition, isCustomElement);
// https://dom.spec.whatwg.org/#concept-create-element
// We only handle the "synchronous custom elements flag is set" now.
// For the unset case (e.g. cloning a node), see bug 1319342 for that.
// Step 4.
RefPtr<CustomElementDefinition> definition = aDefinition;
if (isCustomElement && !definition) {
MOZ_ASSERT(nodeInfo->NameAtom()->Equals(nodeInfo->LocalName()));
definition = nsContentUtils::LookupCustomElementDefinition(
nodeInfo->GetDocument(), nodeInfo->NameAtom(), nodeInfo->NamespaceID(),
typeAtom);
}
// It might be a problem that parser synchronously calls constructor, so filed
// bug 1378079 to figure out what we should do for parser case.
if (definition) {
/*
* Synchronous custom elements flag is determined by 3 places in spec,
* 1) create an element for a token, the flag is determined by
* "will execute script" which is not originally created
* for the HTML fragment parsing algorithm.
* 2) createElement and createElementNS, the flag is the same as
* NOT_FROM_PARSER.
* 3) clone a node, our implementation will not go into this function.
* For the unset case which is non-synchronous only applied for
* inner/outerHTML.
*/
bool synchronousCustomElements = aFromParser != dom::FROM_PARSER_FRAGMENT;
// Per discussion in https://github.com/w3c/webcomponents/issues/635,
// use entry global in those places that are called from JS APIs and use the
// node document's global object if it is called from parser.
nsIGlobalObject* global;
if (aFromParser == dom::NOT_FROM_PARSER) {
global = GetEntryGlobal();
// Documents created from the PrototypeDocumentSink always use
// NOT_FROM_PARSER for non-XUL elements. We can get the global from the
// document in that case.
if (!global) {
Document* doc = nodeInfo->GetDocument();
if (doc && doc->LoadedFromPrototype()) {
global = doc->GetScopeObject();
}
}
} else {
global = nodeInfo->GetDocument()->GetScopeObject();
}
if (!global) {
// In browser chrome code, one may have access to a document which doesn't
// have scope object anymore.
return NS_ERROR_FAILURE;
}
AutoAllowLegacyScriptExecution exemption;
AutoEntryScript aes(global, "create custom elements");
JSContext* cx = aes.cx();
ErrorResult rv;
// Step 5.
if (definition->IsCustomBuiltIn()) {
// SetupCustomElement() should be called with an element that don't have
// CustomElementData setup, if not we will hit the assertion in
// SetCustomElementData().
// Built-in element
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
*aResult =
CreateHTMLElement(tag, nodeInfo.forget(), aFromParser).take();
} else {
NS_IF_ADDREF(*aResult = nsXULElement::Construct(nodeInfo.forget()));
}
(*aResult)->SetCustomElementData(MakeUnique<CustomElementData>(typeAtom));
if (synchronousCustomElements) {
CustomElementRegistry::Upgrade(*aResult, definition, rv);
if (rv.MaybeSetPendingException(cx)) {
aes.ReportException();
}
} else {
nsContentUtils::EnqueueUpgradeReaction(*aResult, definition);
}
return NS_OK;
}
// Step 6.1.
if (synchronousCustomElements) {
definition->mPrefixStack.AppendElement(nodeInfo->GetPrefixAtom());
RefPtr<Document> doc = nodeInfo->GetDocument();
DoCustomElementCreate(aResult, cx, doc, nodeInfo,
MOZ_KnownLive(definition->mConstructor), rv);
if (rv.MaybeSetPendingException(cx)) {
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
NS_IF_ADDREF(*aResult = NS_NewHTMLUnknownElement(nodeInfo.forget(),
aFromParser));
} else {
NS_IF_ADDREF(*aResult = nsXULElement::Construct(nodeInfo.forget()));
}
(*aResult)->SetDefined(false);
}
definition->mPrefixStack.RemoveLastElement();
return NS_OK;
}
// Step 6.2.
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
NS_IF_ADDREF(*aResult =
NS_NewHTMLElement(nodeInfo.forget(), aFromParser));
} else {
NS_IF_ADDREF(*aResult = nsXULElement::Construct(nodeInfo.forget()));
}
(*aResult)->SetCustomElementData(
MakeUnique<CustomElementData>(definition->mType));
nsContentUtils::EnqueueUpgradeReaction(*aResult, definition);
return NS_OK;
}
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
// Per the Custom Element specification, unknown tags that are valid custom
// element names should be HTMLElement instead of HTMLUnknownElement.
if (isCustomElementName) {
NS_IF_ADDREF(*aResult =
NS_NewHTMLElement(nodeInfo.forget(), aFromParser));
} else {
*aResult = CreateHTMLElement(tag, nodeInfo.forget(), aFromParser).take();
}
} else {
NS_IF_ADDREF(*aResult = nsXULElement::Construct(nodeInfo.forget()));
}
if (!*aResult) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (isCustomElement) {
(*aResult)->SetCustomElementData(MakeUnique<CustomElementData>(typeAtom));
nsContentUtils::RegisterCallbackUpgradeElement(*aResult, typeAtom);
}
return NS_OK;
}
CustomElementRegistry* nsContentUtils::GetCustomElementRegistry(
Document* aDoc) {
MOZ_ASSERT(aDoc);
if (!aDoc->GetDocShell()) {
return nullptr;
}
nsPIDOMWindowInner* window = aDoc->GetInnerWindow();
if (!window) {
return nullptr;
}
return window->CustomElements();
}
/* static */
CustomElementDefinition* nsContentUtils::LookupCustomElementDefinition(
Document* aDoc, nsAtom* aNameAtom, uint32_t aNameSpaceID,
nsAtom* aTypeAtom) {
if (aNameSpaceID != kNameSpaceID_XUL && aNameSpaceID != kNameSpaceID_XHTML) {
return nullptr;
}
RefPtr<CustomElementRegistry> registry = GetCustomElementRegistry(aDoc);
if (!registry) {
return nullptr;
}
return registry->LookupCustomElementDefinition(aNameAtom, aNameSpaceID,
aTypeAtom);
}
/* static */
void nsContentUtils::RegisterCallbackUpgradeElement(Element* aElement,
nsAtom* aTypeName) {
MOZ_ASSERT(aElement);
Document* doc = aElement->OwnerDoc();
CustomElementRegistry* registry = GetCustomElementRegistry(doc);
if (registry) {
registry->RegisterCallbackUpgradeElement(aElement, aTypeName);
}
}
/* static */
void nsContentUtils::RegisterUnresolvedElement(Element* aElement,
nsAtom* aTypeName) {
MOZ_ASSERT(aElement);
Document* doc = aElement->OwnerDoc();
CustomElementRegistry* registry = GetCustomElementRegistry(doc);
if (registry) {
registry->RegisterUnresolvedElement(aElement, aTypeName);
}
}
/* static */
void nsContentUtils::UnregisterUnresolvedElement(Element* aElement) {
MOZ_ASSERT(aElement);
nsAtom* typeAtom = aElement->GetCustomElementData()->GetCustomElementType();
Document* doc = aElement->OwnerDoc();
CustomElementRegistry* registry = GetCustomElementRegistry(doc);
if (registry) {
registry->UnregisterUnresolvedElement(aElement, typeAtom);
}
}
/* static */
void nsContentUtils::EnqueueUpgradeReaction(
Element* aElement, CustomElementDefinition* aDefinition) {
MOZ_ASSERT(aElement);
Document* doc = aElement->OwnerDoc();
// No DocGroup means no custom element reactions stack.
if (!doc->GetDocGroup()) {
return;
}
CustomElementReactionsStack* stack =
doc->GetDocGroup()->CustomElementReactionsStack();
stack->EnqueueUpgradeReaction(aElement, aDefinition);
}
/* static */
void nsContentUtils::EnqueueLifecycleCallback(
ElementCallbackType aType, Element* aCustomElement,
const LifecycleCallbackArgs& aArgs, CustomElementDefinition* aDefinition) {
// No DocGroup means no custom element reactions stack.
if (!aCustomElement->OwnerDoc()->GetDocGroup()) {
return;
}
CustomElementRegistry::EnqueueLifecycleCallback(aType, aCustomElement, aArgs,
aDefinition);
}
/* static */
void nsContentUtils::AppendDocumentLevelNativeAnonymousContentTo(
Document* aDocument, nsTArray<nsIContent*>& aElements) {
MOZ_ASSERT(aDocument);
#ifdef DEBUG
size_t oldLength = aElements.Length();
#endif
if (PresShell* presShell = aDocument->GetPresShell()) {
if (nsIFrame* scrollFrame = presShell->GetRootScrollFrame()) {
nsIAnonymousContentCreator* creator = do_QueryFrame(scrollFrame);
MOZ_ASSERT(
creator,
"scroll frame should always implement nsIAnonymousContentCreator");
creator->AppendAnonymousContentTo(aElements, 0);
}
if (nsCanvasFrame* canvasFrame = presShell->GetCanvasFrame()) {
canvasFrame->AppendAnonymousContentTo(aElements, 0);
}
}
#ifdef DEBUG
for (size_t i = oldLength; i < aElements.Length(); i++) {
MOZ_ASSERT(
aElements[i]->GetProperty(nsGkAtoms::docLevelNativeAnonymousContent),
"Someone here has lied, or missed to flag the node");
}
#endif
}
static void AppendNativeAnonymousChildrenFromFrame(nsIFrame* aFrame,
nsTArray<nsIContent*>& aKids,
uint32_t aFlags) {
if (nsIAnonymousContentCreator* ac = do_QueryFrame(aFrame)) {
ac->AppendAnonymousContentTo(aKids, aFlags);
}
}
/* static */
void nsContentUtils::AppendNativeAnonymousChildren(const nsIContent* aContent,
nsTArray<nsIContent*>& aKids,
uint32_t aFlags) {
if (aContent->MayHaveAnonymousChildren()) {
if (nsIFrame* primaryFrame = aContent->GetPrimaryFrame()) {
// NAC created by the element's primary frame.
AppendNativeAnonymousChildrenFromFrame(primaryFrame, aKids, aFlags);
// NAC created by any other non-primary frames for the element.
AutoTArray<nsIFrame::OwnedAnonBox, 8> ownedAnonBoxes;
primaryFrame->AppendOwnedAnonBoxes(ownedAnonBoxes);
for (nsIFrame::OwnedAnonBox& box : ownedAnonBoxes) {
MOZ_ASSERT(box.mAnonBoxFrame->GetContent() == aContent);
AppendNativeAnonymousChildrenFromFrame(box.mAnonBoxFrame, aKids,
aFlags);
}
}
// Get manually created NAC (editor resize handles, etc.).
if (auto nac = static_cast<ManualNACArray*>(
aContent->GetProperty(nsGkAtoms::manualNACProperty))) {
aKids.AppendElements(*nac);
}
}
// The root scroll frame is not the primary frame of the root element.
// Detect and handle this case.
if (!(aFlags & nsIContent::eSkipDocumentLevelNativeAnonymousContent) &&
aContent == aContent->OwnerDoc()->GetRootElement()) {
AppendDocumentLevelNativeAnonymousContentTo(aContent->OwnerDoc(), aKids);
}
}
bool nsContentUtils::IsImageAvailable(nsIContent* aLoadingNode, nsIURI* aURI,
nsIPrincipal* aDefaultTriggeringPrincipal,
CORSMode aCORSMode) {
nsCOMPtr<nsIPrincipal> triggeringPrincipal;
QueryTriggeringPrincipal(aLoadingNode, aDefaultTriggeringPrincipal,
getter_AddRefs(triggeringPrincipal));
MOZ_ASSERT(triggeringPrincipal);
Document* doc = aLoadingNode->OwnerDoc();
imgLoader* imgLoader = GetImgLoaderForDocument(doc);
return imgLoader->IsImageAvailable(aURI, triggeringPrincipal, aCORSMode, doc);
}
/* static */
bool nsContentUtils::QueryTriggeringPrincipal(
nsIContent* aLoadingNode, nsIPrincipal* aDefaultPrincipal,
nsIPrincipal** aTriggeringPrincipal) {
MOZ_ASSERT(aLoadingNode);
MOZ_ASSERT(aTriggeringPrincipal);
bool result = false;
nsCOMPtr<nsIPrincipal> loadingPrincipal = aDefaultPrincipal;
if (!loadingPrincipal) {
loadingPrincipal = aLoadingNode->NodePrincipal();
}
// If aLoadingNode is content, bail out early.
if (!aLoadingNode->NodePrincipal()->IsSystemPrincipal()) {
loadingPrincipal.forget(aTriggeringPrincipal);
return result;
}
nsAutoString loadingStr;
if (aLoadingNode->IsElement()) {
aLoadingNode->AsElement()->GetAttr(
kNameSpaceID_None, nsGkAtoms::triggeringprincipal, loadingStr);
}
// Fall back if 'triggeringprincipal' isn't specified,
if (loadingStr.IsEmpty()) {
loadingPrincipal.forget(aTriggeringPrincipal);
return result;
}
nsCString binary;
nsresult rv = Base64Decode(NS_ConvertUTF16toUTF8(loadingStr), binary);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPrincipal> serializedPrin = BasePrincipal::FromJSON(binary);
if (serializedPrin) {
result = true;
serializedPrin.forget(aTriggeringPrincipal);
}
} else {
MOZ_ASSERT(false, "Unable to deserialize base64 principal");
}
if (!result) {
// Fallback if the deserialization is failed.
loadingPrincipal.forget(aTriggeringPrincipal);
}
return result;
}
/* static */
void nsContentUtils::GetContentPolicyTypeForUIImageLoading(
nsIContent* aLoadingNode, nsIPrincipal** aTriggeringPrincipal,
nsContentPolicyType& aContentPolicyType, uint64_t* aRequestContextID) {
MOZ_ASSERT(aRequestContextID);
bool result = QueryTriggeringPrincipal(aLoadingNode, aTriggeringPrincipal);
if (result) {
// Set the content policy type to TYPE_INTERNAL_IMAGE_FAVICON for
// indicating it's a favicon loading.
aContentPolicyType = nsIContentPolicy::TYPE_INTERNAL_IMAGE_FAVICON;
nsAutoString requestContextID;
if (aLoadingNode->IsElement()) {
aLoadingNode->AsElement()->GetAttr(
kNameSpaceID_None, nsGkAtoms::requestcontextid, requestContextID);
}
nsresult rv;
int64_t val = requestContextID.ToInteger64(&rv);
*aRequestContextID = NS_SUCCEEDED(rv) ? val : 0;
} else {
aContentPolicyType = nsIContentPolicy::TYPE_INTERNAL_IMAGE;
}
}
/* static */
nsresult nsContentUtils::CreateJSValueFromSequenceOfObject(
JSContext* aCx, const Sequence<JSObject*>& aTransfer,
JS::MutableHandle<JS::Value> aValue) {
if (aTransfer.IsEmpty()) {
return NS_OK;
}
JS::Rooted<JSObject*> array(aCx, JS::NewArrayObject(aCx, aTransfer.Length()));
if (!array) {
return NS_ERROR_OUT_OF_MEMORY;
}
for (uint32_t i = 0; i < aTransfer.Length(); ++i) {
JS::Rooted<JSObject*> object(aCx, aTransfer[i]);
if (!object) {
continue;
}
if (NS_WARN_IF(
!JS_DefineElement(aCx, array, i, object, JSPROP_ENUMERATE))) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
aValue.setObject(*array);
return NS_OK;
}
/* static */
void nsContentUtils::StructuredClone(JSContext* aCx, nsIGlobalObject* aGlobal,
JS::Handle<JS::Value> aValue,
const StructuredSerializeOptions& aOptions,
JS::MutableHandle<JS::Value> aRetval,
ErrorResult& aError) {
JS::Rooted<JS::Value> transferArray(aCx, JS::UndefinedValue());
aError = nsContentUtils::CreateJSValueFromSequenceOfObject(
aCx, aOptions.mTransfer, &transferArray);
if (NS_WARN_IF(aError.Failed())) {
return;
}
JS::CloneDataPolicy clonePolicy;
clonePolicy.allowIntraClusterClonableSharedObjects();
clonePolicy.allowSharedMemoryObjects();
StructuredCloneHolder holder(StructuredCloneHolder::CloningSupported,
StructuredCloneHolder::TransferringSupported,
JS::StructuredCloneScope::SameProcess);
holder.Write(aCx, aValue, transferArray, clonePolicy, aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
holder.Read(aGlobal, aCx, aRetval, clonePolicy, aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
nsTArray<RefPtr<MessagePort>> ports = holder.TakeTransferredPorts();
Unused << ports;
}
/* static */
bool nsContentUtils::ShouldBlockReservedKeys(WidgetKeyboardEvent* aKeyEvent) {
nsCOMPtr<nsIPrincipal> principal;
RefPtr<Element> targetElement =
Element::FromEventTargetOrNull(aKeyEvent->mOriginalTarget);
nsCOMPtr<nsIBrowser> targetBrowser;
if (targetElement) {
targetBrowser = targetElement->AsBrowser();
}
bool isRemoteBrowser = false;
if (targetBrowser) {
targetBrowser->GetIsRemoteBrowser(&isRemoteBrowser);
}
if (isRemoteBrowser) {
targetBrowser->GetContentPrincipal(getter_AddRefs(principal));
return principal ? nsContentUtils::IsSitePermDeny(principal, "shortcuts"_ns)
: false;
}
if (targetElement) {
Document* doc = targetElement->GetUncomposedDoc();
if (doc) {
RefPtr<WindowContext> wc = doc->GetWindowContext();
if (wc) {
return wc->TopWindowContext()->GetShortcutsPermission() ==
nsIPermissionManager::DENY_ACTION;
}
}
}
return false;
}
/**
* Checks whether the given type is a supported document type for
* loading within the nsObjectLoadingContent specified by aContent.
*
* NOTE Helper method for nsContentUtils::HtmlObjectContentTypeForMIMEType.
* NOTE Does not take content policy or capabilities into account
*/
static bool HtmlObjectContentSupportsDocument(const nsCString& aMimeType) {
nsCOMPtr<nsIWebNavigationInfo> info(
do_GetService(NS_WEBNAVIGATION_INFO_CONTRACTID));
if (!info) {
return false;
}
uint32_t supported;
nsresult rv = info->IsTypeSupported(aMimeType, &supported);
if (NS_FAILED(rv)) {
return false;
}
if (supported != nsIWebNavigationInfo::UNSUPPORTED) {
// Don't want to support plugins as documents
return supported != nsIWebNavigationInfo::FALLBACK;
}
// Try a stream converter
// NOTE: We treat any type we can convert from as a supported type. If a
// type is not actually supported, the URI loader will detect that and
// return an error, and we'll fallback.
nsCOMPtr<nsIStreamConverterService> convServ =
do_GetService("@mozilla.org/streamConverters;1");
bool canConvert = false;
if (convServ) {
rv = convServ->CanConvert(aMimeType.get(), "*/*", &canConvert);
}
return NS_SUCCEEDED(rv) && canConvert;
}
/* static */
already_AddRefed<nsIPluginTag> nsContentUtils::PluginTagForType(
const nsCString& aMIMEType, bool aNoFakePlugin) {
RefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
nsCOMPtr<nsIPluginTag> tag;
NS_ENSURE_TRUE(pluginHost, nullptr);
// ShouldPlay will handle the case where the plugin is disabled
pluginHost->GetPluginTagForType(
aMIMEType,
aNoFakePlugin ? nsPluginHost::eExcludeFake : nsPluginHost::eExcludeNone,
getter_AddRefs(tag));
return tag.forget();
}
/* static */
uint32_t nsContentUtils::HtmlObjectContentTypeForMIMEType(
const nsCString& aMIMEType, bool aNoFakePlugin) {
if (aMIMEType.IsEmpty()) {
return nsIObjectLoadingContent::TYPE_NULL;
}
if (imgLoader::SupportImageWithMimeType(aMIMEType)) {
return nsIObjectLoadingContent::TYPE_IMAGE;
}
// Faking support of the PDF content as a document for EMBED tags
// when internal PDF viewer is enabled.
if (aMIMEType.LowerCaseEqualsLiteral("application/pdf") && IsPDFJSEnabled()) {
return nsIObjectLoadingContent::TYPE_DOCUMENT;
}
if (HtmlObjectContentSupportsDocument(aMIMEType)) {
return nsIObjectLoadingContent::TYPE_DOCUMENT;
}
bool isSpecialPlugin = nsPluginHost::GetSpecialType(aMIMEType) !=
nsPluginHost::eSpecialType_None;
if (isSpecialPlugin) {
return nsIObjectLoadingContent::TYPE_FALLBACK;
}
return nsIObjectLoadingContent::TYPE_NULL;
}
/* static */
already_AddRefed<nsISerialEventTarget> nsContentUtils::GetEventTargetByLoadInfo(
nsILoadInfo* aLoadInfo, TaskCategory aCategory) {
if (NS_WARN_IF(!aLoadInfo)) {
return nullptr;
}
RefPtr<Document> doc;
aLoadInfo->GetLoadingDocument(getter_AddRefs(doc));
nsCOMPtr<nsISerialEventTarget> target;
if (doc) {
if (DocGroup* group = doc->GetDocGroup()) {
target = group->EventTargetFor(aCategory);
}
} else {
target = GetMainThreadSerialEventTarget();
}
return target.forget();
}
/* static */
bool nsContentUtils::IsLocalRefURL(const nsAString& aString) {
return !aString.IsEmpty() && aString[0] == '#';
}
// We use only 53 bits for the ID so that it can be converted to and from a JS
// value without loss of precision. The upper bits of the ID hold the process
// ID. The lower bits identify the object itself.
static constexpr uint64_t kIdTotalBits = 53;
static constexpr uint64_t kIdProcessBits = 22;
static constexpr uint64_t kIdBits = kIdTotalBits - kIdProcessBits;
/* static */
uint64_t nsContentUtils::GenerateProcessSpecificId(uint64_t aId) {
uint64_t processId = 0;
if (XRE_IsContentProcess()) {
ContentChild* cc = ContentChild::GetSingleton();
processId = cc->GetID();
}
MOZ_RELEASE_ASSERT(processId < (uint64_t(1) << kIdProcessBits));
uint64_t processBits = processId & ((uint64_t(1) << kIdProcessBits) - 1);
uint64_t id = aId;
MOZ_RELEASE_ASSERT(id < (uint64_t(1) << kIdBits));
uint64_t bits = id & ((uint64_t(1) << kIdBits) - 1);
return (processBits << kIdBits) | bits;
}
/* static */
std::tuple<uint64_t, uint64_t> nsContentUtils::SplitProcessSpecificId(
uint64_t aId) {
return {aId >> kIdBits, aId & ((uint64_t(1) << kIdBits) - 1)};
}
// Next process-local Tab ID.
static uint64_t gNextTabId = 0;
/* static */
uint64_t nsContentUtils::GenerateTabId() {
return GenerateProcessSpecificId(++gNextTabId);
}
// Next process-local Browser ID.
static uint64_t gNextBrowserId = 0;
/* static */
uint64_t nsContentUtils::GenerateBrowserId() {
return GenerateProcessSpecificId(++gNextBrowserId);
}
// Next process-local Browsing Context ID.
static uint64_t gNextBrowsingContextId = 0;
/* static */
uint64_t nsContentUtils::GenerateBrowsingContextId() {
return GenerateProcessSpecificId(++gNextBrowsingContextId);
}
// Next process-local Window ID.
static uint64_t gNextWindowId = 0;
/* static */
uint64_t nsContentUtils::GenerateWindowId() {
return GenerateProcessSpecificId(++gNextWindowId);
}
// Next process-local load.
static Atomic<uint64_t> gNextLoadIdentifier(0);
/* static */
uint64_t nsContentUtils::GenerateLoadIdentifier() {
return GenerateProcessSpecificId(++gNextLoadIdentifier);
}
/* static */
bool nsContentUtils::GetUserIsInteracting() {
return UserInteractionObserver::sUserActive;
}
/* static */
bool nsContentUtils::GetSourceMapURL(nsIHttpChannel* aChannel,
nsACString& aResult) {
nsresult rv = aChannel->GetResponseHeader("SourceMap"_ns, aResult);
if (NS_FAILED(rv)) {
rv = aChannel->GetResponseHeader("X-SourceMap"_ns, aResult);
}
return NS_SUCCEEDED(rv);
}
/* static */
bool nsContentUtils::IsMessageInputEvent(const IPC::Message& aMsg) {
if ((aMsg.type() & mozilla::dom::PBrowser::PBrowserStart) ==
mozilla::dom::PBrowser::PBrowserStart) {
switch (aMsg.type()) {
case mozilla::dom::PBrowser::Msg_RealMouseMoveEvent__ID:
case mozilla::dom::PBrowser::Msg_RealMouseButtonEvent__ID:
case mozilla::dom::PBrowser::Msg_RealMouseEnterExitWidgetEvent__ID:
case mozilla::dom::PBrowser::Msg_RealKeyEvent__ID:
case mozilla::dom::PBrowser::Msg_MouseWheelEvent__ID:
case mozilla::dom::PBrowser::Msg_RealTouchEvent__ID:
case mozilla::dom::PBrowser::Msg_RealTouchMoveEvent__ID:
case mozilla::dom::PBrowser::Msg_RealDragEvent__ID:
case mozilla::dom::PBrowser::Msg_UpdateDimensions__ID:
return true;
}
}
return false;
}
/* static */
bool nsContentUtils::IsMessageCriticalInputEvent(const IPC::Message& aMsg) {
if ((aMsg.type() & mozilla::dom::PBrowser::PBrowserStart) ==
mozilla::dom::PBrowser::PBrowserStart) {
switch (aMsg.type()) {
case mozilla::dom::PBrowser::Msg_RealMouseButtonEvent__ID:
case mozilla::dom::PBrowser::Msg_RealKeyEvent__ID:
case mozilla::dom::PBrowser::Msg_MouseWheelEvent__ID:
case mozilla::dom::PBrowser::Msg_RealTouchEvent__ID:
case mozilla::dom::PBrowser::Msg_RealDragEvent__ID:
return true;
}
}
return false;
}
static const char* kUserInteractionInactive = "user-interaction-inactive";
static const char* kUserInteractionActive = "user-interaction-active";
void nsContentUtils::UserInteractionObserver::Init() {
// Listen for the observer messages from EventStateManager which are telling
// us whether or not the user is interacting.
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
obs->AddObserver(this, kUserInteractionInactive, false);
obs->AddObserver(this, kUserInteractionActive, false);
// We can't register ourselves as an annotator yet, as the
// BackgroundHangMonitor hasn't started yet. It will have started by the
// time we have the chance to spin the event loop.
RefPtr<UserInteractionObserver> self = this;
NS_DispatchToMainThread(NS_NewRunnableFunction(
"nsContentUtils::UserInteractionObserver::Init",
[=]() { BackgroundHangMonitor::RegisterAnnotator(*self); }));
}
void nsContentUtils::UserInteractionObserver::Shutdown() {
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->RemoveObserver(this, kUserInteractionInactive);
obs->RemoveObserver(this, kUserInteractionActive);
}
BackgroundHangMonitor::UnregisterAnnotator(*this);
}
/**
* NB: This function is always called by the BackgroundHangMonitor thread.
* Plan accordingly
*/
void nsContentUtils::UserInteractionObserver::AnnotateHang(
BackgroundHangAnnotations& aAnnotations) {
// NOTE: Only annotate the hang report if the user is known to be interacting.
if (sUserActive) {
aAnnotations.AddAnnotation(u"UserInteracting"_ns, true);
}
}
NS_IMETHODIMP
nsContentUtils::UserInteractionObserver::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData) {
if (!strcmp(aTopic, kUserInteractionInactive)) {
sUserActive = false;
} else if (!strcmp(aTopic, kUserInteractionActive)) {
sUserActive = true;
} else {
NS_WARNING("Unexpected observer notification");
}
return NS_OK;
}
Atomic<bool> nsContentUtils::UserInteractionObserver::sUserActive(false);
NS_IMPL_ISUPPORTS(nsContentUtils::UserInteractionObserver, nsIObserver)
/* static */
bool nsContentUtils::IsSpecialName(const nsAString& aName) {
return aName.LowerCaseEqualsLiteral("_blank") ||
aName.LowerCaseEqualsLiteral("_top") ||
aName.LowerCaseEqualsLiteral("_parent") ||
aName.LowerCaseEqualsLiteral("_self");
}
/* static */
bool nsContentUtils::IsOverridingWindowName(const nsAString& aName) {
return !aName.IsEmpty() && !IsSpecialName(aName);
}
// Unfortunately, we can't unwrap an IDL object using only a concrete type.
// We need to calculate type data based on the IDL typename. Which means
// wrapping our templated function in a macro.
#define EXTRACT_EXN_VALUES(T, ...) \
ExtractExceptionValues<mozilla::dom::prototypes::id::T, \
T##_Binding::NativeType, T>(__VA_ARGS__) \
.isOk()
template <prototypes::ID PrototypeID, class NativeType, typename T>
static Result<Ok, nsresult> ExtractExceptionValues(
JSContext* aCx, JS::HandleObject aObj, nsAString& aSourceSpecOut,
uint32_t* aLineOut, uint32_t* aColumnOut, nsString& aMessageOut) {
AssertStaticUnwrapOK<PrototypeID>();
RefPtr<T> exn;
MOZ_TRY((UnwrapObject<PrototypeID, NativeType>(aObj, exn, nullptr)));
exn->GetFilename(aCx, aSourceSpecOut);
if (!aSourceSpecOut.IsEmpty()) {
*aLineOut = exn->LineNumber(aCx);
*aColumnOut = exn->ColumnNumber();
}
exn->GetName(aMessageOut);
aMessageOut.AppendLiteral(": ");
nsAutoString message;
exn->GetMessageMoz(message);
aMessageOut.Append(message);
return Ok();
}
/* static */
void nsContentUtils::ExtractErrorValues(
JSContext* aCx, JS::Handle<JS::Value> aValue, nsACString& aSourceSpecOut,
uint32_t* aLineOut, uint32_t* aColumnOut, nsString& aMessageOut) {
nsAutoString sourceSpec;
ExtractErrorValues(aCx, aValue, sourceSpec, aLineOut, aColumnOut,
aMessageOut);
CopyUTF16toUTF8(sourceSpec, aSourceSpecOut);
}
/* static */
void nsContentUtils::ExtractErrorValues(
JSContext* aCx, JS::Handle<JS::Value> aValue, nsAString& aSourceSpecOut,
uint32_t* aLineOut, uint32_t* aColumnOut, nsString& aMessageOut) {
MOZ_ASSERT(aLineOut);
MOZ_ASSERT(aColumnOut);
if (aValue.isObject()) {
JS::Rooted<JSObject*> obj(aCx, &aValue.toObject());
// Try to process as an Error object. Use the file/line/column values
// from the Error as they will be more specific to the root cause of
// the problem.
JSErrorReport* err = obj ? JS_ErrorFromException(aCx, obj) : nullptr;
if (err) {
// Use xpc to extract the error message only. We don't actually send
// this report anywhere.
RefPtr<xpc::ErrorReport> report = new xpc::ErrorReport();
report->Init(err,
nullptr, // toString result
false, // chrome
0); // window ID
if (!report->mFileName.IsEmpty()) {
aSourceSpecOut = report->mFileName;
*aLineOut = report->mLineNumber;
*aColumnOut = report->mColumn;
}
aMessageOut.Assign(report->mErrorMsg);
}
// Next, try to unwrap the rejection value as a DOMException.
else if (EXTRACT_EXN_VALUES(DOMException, aCx, obj, aSourceSpecOut,
aLineOut, aColumnOut, aMessageOut)) {
return;
}
// Next, try to unwrap the rejection value as an XPC Exception.
else if (EXTRACT_EXN_VALUES(Exception, aCx, obj, aSourceSpecOut, aLineOut,
aColumnOut, aMessageOut)) {
return;
}
}
// If we could not unwrap a specific error type, then perform default safe
// string conversions on primitives. Objects will result in "[Object]"
// unfortunately.
if (aMessageOut.IsEmpty()) {
nsAutoJSString jsString;
if (jsString.init(aCx, aValue)) {
aMessageOut = jsString;
} else {
JS_ClearPendingException(aCx);
}
}
}
#undef EXTRACT_EXN_VALUES
/* static */
bool nsContentUtils::ContentIsLink(nsIContent* aContent) {
if (!aContent || !aContent->IsElement()) {
return false;
}
if (aContent->IsHTMLElement(nsGkAtoms::a)) {
return true;
}
return aContent->AsElement()->AttrValueIs(kNameSpaceID_XLink, nsGkAtoms::type,
nsGkAtoms::simple, eCaseMatters);
}
/* static */
already_AddRefed<ContentFrameMessageManager>
nsContentUtils::TryGetBrowserChildGlobal(nsISupports* aFrom) {
RefPtr<nsFrameLoaderOwner> frameLoaderOwner = do_QueryObject(aFrom);
if (!frameLoaderOwner) {
return nullptr;
}
RefPtr<nsFrameLoader> frameLoader = frameLoaderOwner->GetFrameLoader();
if (!frameLoader) {
return nullptr;
}
RefPtr<ContentFrameMessageManager> manager =
frameLoader->GetBrowserChildMessageManager();
return manager.forget();
}
/* static */
uint32_t nsContentUtils::InnerOrOuterWindowCreated() {
MOZ_ASSERT(NS_IsMainThread());
++sInnerOrOuterWindowCount;
return ++sInnerOrOuterWindowSerialCounter;
}
/* static */
void nsContentUtils::InnerOrOuterWindowDestroyed() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(sInnerOrOuterWindowCount > 0);
--sInnerOrOuterWindowCount;
}
static bool JSONCreator(const char16_t* aBuf, uint32_t aLen, void* aData) {
nsAString* result = static_cast<nsAString*>(aData);
result->Append(static_cast<const char16_t*>(aBuf),
static_cast<uint32_t>(aLen));
return true;
}
/* static */
bool nsContentUtils::StringifyJSON(JSContext* aCx,
JS::MutableHandle<JS::Value> aValue,
nsAString& aOutStr) {
MOZ_ASSERT(aCx);
aOutStr.Truncate();
JS::RootedValue value(aCx, aValue.get());
nsAutoString serializedValue;
NS_ENSURE_TRUE(JS_Stringify(aCx, &value, nullptr, JS::NullHandleValue,
JSONCreator, &serializedValue),
false);
aOutStr = serializedValue;
return true;
}
/* static */
bool nsContentUtils::
HighPriorityEventPendingForTopLevelDocumentBeforeContentfulPaint(
Document* aDocument) {
MOZ_ASSERT(XRE_IsContentProcess(),
"This function only makes sense in content processes");
if (aDocument && !aDocument->IsLoadedAsData()) {
if (nsPresContext* presContext = FindPresContextForDocument(aDocument)) {
MOZ_ASSERT(!presContext->IsChrome(),
"Should never have a chrome PresContext in a content process");
return !presContext->GetInProcessRootContentDocumentPresContext()
->HadContentfulPaint() &&
nsThreadManager::MainThreadHasPendingHighPriorityEvents();
}
}
return false;
}
/* static */
nsGlobalWindowInner* nsContentUtils::CallerInnerWindow() {
nsIGlobalObject* global = GetIncumbentGlobal();
NS_ENSURE_TRUE(global, nullptr);
if (auto* window = global->AsInnerWindow()) {
return nsGlobalWindowInner::Cast(window);
}
// When Extensions run content scripts inside a sandbox, it uses
// sandboxPrototype to make them appear as though they're running in the
// scope of the page. So when a content script invokes postMessage, it expects
// the |source| of the received message to be the window set as the
// sandboxPrototype. This used to work incidentally for unrelated reasons, but
// now we need to do some special handling to support it.
JS::Rooted<JSObject*> scope(RootingCx(), global->GetGlobalJSObject());
NS_ENSURE_TRUE(scope, nullptr);
if (xpc::IsSandbox(scope)) {
AutoJSAPI jsapi;
MOZ_ALWAYS_TRUE(jsapi.Init(scope));
JSContext* cx = jsapi.cx();
// Our current Realm on aCx is the sandbox. Using that for unwrapping
// makes sense: if the sandbox can unwrap the window, we can use it.
return xpc::SandboxWindowOrNull(scope, cx);
}
// The calling window must be holding a reference, so we can return a weak
// pointer.
return nsGlobalWindowInner::Cast(global->AsInnerWindow());
}
/* static */
bool nsContentUtils::IsURIInPrefList(nsIURI* aURI, const char* aPrefName) {
MOZ_ASSERT(aPrefName);
nsAutoCString list;
Preferences::GetCString(aPrefName, list);
ToLowerCase(list);
return IsURIInList(aURI, list);
}
/* static */
bool nsContentUtils::IsURIInList(nsIURI* aURI, const nsCString& aList) {
#ifdef DEBUG
nsAutoCString listLowerCase(aList);
ToLowerCase(listLowerCase);
MOZ_ASSERT(listLowerCase.Equals(aList),
"The aList argument should be lower-case");
#endif
if (!aURI) {
return false;
}
nsAutoCString scheme;
aURI->GetScheme(scheme);
if (!scheme.EqualsLiteral("http") && !scheme.EqualsLiteral("https")) {
return false;
}
if (aList.IsEmpty()) {
return false;
}
// The list is comma separated domain list. Each item may start with "*.".
// If starts with "*.", it matches any sub-domains.
nsCCharSeparatedTokenizer tokenizer(aList, ',');
while (tokenizer.hasMoreTokens()) {
const nsCString token(tokenizer.nextToken());
nsAutoCString host;
aURI->GetHost(host);
if (host.IsEmpty()) {
return false;
}
ToLowerCase(host);
for (;;) {
int32_t index = token.Find(host, false);
if (index >= 0 &&
static_cast<uint32_t>(index) + host.Length() <= token.Length()) {
// If we found a full match, return true.
size_t indexAfterHost = index + host.Length();
if (index == 0 && indexAfterHost == token.Length()) {
return true;
}
// If next character is '/', we need to check the path too.
// We assume the path in the list means "/foo" + "*".
if (token[indexAfterHost] == '/') {
nsDependentCSubstring pathInList(
token, indexAfterHost,
static_cast<nsDependentCSubstring::size_type>(-1));
nsAutoCString filePath;
aURI->GetFilePath(filePath);
ToLowerCase(filePath);
if (StringBeginsWith(filePath, pathInList) &&
(filePath.Length() == pathInList.Length() ||
pathInList.EqualsLiteral("/") ||
filePath[pathInList.Length() - 1] == '/' ||
filePath[pathInList.Length() - 1] == '?' ||
filePath[pathInList.Length() - 1] == '#')) {
return true;
}
}
}
int32_t startIndexOfCurrentLevel = host[0] == '*' ? 1 : 0;
int32_t startIndexOfNextLevel =
host.Find(".", false, startIndexOfCurrentLevel + 1);
if (startIndexOfNextLevel <= 0) {
break;
}
host = "*"_ns + nsDependentCSubstring(host, startIndexOfNextLevel);
}
}
return false;
}
/* static */
ScreenIntMargin nsContentUtils::GetWindowSafeAreaInsets(
nsIScreen* aScreen, const ScreenIntMargin& aSafeAreaInsets,
const LayoutDeviceIntRect& aWindowRect) {
// This calculates safe area insets of window from screen rectangle, window
// rectangle and safe area insets of screen.
//
// +----------------------------------------+ <-- screen
// | +-------------------------------+ <------- window
// | | window's safe area inset top) | |
// +--+-------------------------------+--+ |
// | | | |<------ safe area rectangle of
// | | | | | screen
// +--+-------------------------------+--+ |
// | |window's safe area inset bottom| |
// | +-------------------------------+ |
// +----------------------------------------+
//
ScreenIntMargin windowSafeAreaInsets;
if (windowSafeAreaInsets == aSafeAreaInsets) {
// no safe area insets.
return windowSafeAreaInsets;
}
int32_t screenLeft, screenTop, screenWidth, screenHeight;
nsresult rv =
aScreen->GetRect(&screenLeft, &screenTop, &screenWidth, &screenHeight);
if (NS_WARN_IF(NS_FAILED(rv))) {
return windowSafeAreaInsets;
}
// Screen's rect of safe area
LayoutDeviceIntRect safeAreaRect(
screenLeft + aSafeAreaInsets.left, screenTop + aSafeAreaInsets.top,
screenWidth - aSafeAreaInsets.right - aSafeAreaInsets.left,
screenHeight - aSafeAreaInsets.bottom - aSafeAreaInsets.top);
// window's rect of safe area
safeAreaRect = safeAreaRect.Intersect(aWindowRect);
windowSafeAreaInsets.top =
aSafeAreaInsets.top ? std::max(safeAreaRect.y - aWindowRect.y, 0) : 0;
windowSafeAreaInsets.left =
aSafeAreaInsets.left ? std::max(safeAreaRect.x - aWindowRect.x, 0) : 0;
windowSafeAreaInsets.right =
aSafeAreaInsets.right
? std::max((aWindowRect.x + aWindowRect.width) -
(safeAreaRect.x + safeAreaRect.width),
0)
: 0;
windowSafeAreaInsets.bottom =
aSafeAreaInsets.bottom
? std::max(aWindowRect.y + aWindowRect.height -
(safeAreaRect.y + safeAreaRect.height),
0)
: 0;
return windowSafeAreaInsets;
}
/* static */
nsContentUtils::SubresourceCacheValidationInfo
nsContentUtils::GetSubresourceCacheValidationInfo(nsIRequest* aRequest,
nsIURI* aURI) {
SubresourceCacheValidationInfo info;
if (nsCOMPtr<nsICacheInfoChannel> cache = do_QueryInterface(aRequest)) {
uint32_t value = 0;
if (NS_SUCCEEDED(cache->GetCacheTokenExpirationTime(&value))) {
info.mExpirationTime.emplace(value);
}
}
// Determine whether the cache entry must be revalidated when we try to use
// it. Currently, only HTTP specifies this information...
if (nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aRequest)) {
Unused << httpChannel->IsNoStoreResponse(&info.mMustRevalidate);
if (!info.mMustRevalidate) {
Unused << httpChannel->IsNoCacheResponse(&info.mMustRevalidate);
}
}
// data: URIs are safe to cache across documents under any circumstance, so we
// special-case them here even though the channel itself doesn't have any
// caching policy. Same for chrome:// uris.
//
// TODO(emilio): Figure out which other schemes that don't have caching
// policies are safe to cache. Blobs should be...
const bool knownCacheable = [&] {
if (!aURI) {
return false;
}
if (aURI->SchemeIs("data") || aURI->SchemeIs("moz-page-thumb") ||
aURI->SchemeIs("moz-extension")) {
return true;
}
if (dom::IsChromeURI(aURI)) {
return !StaticPrefs::nglayout_debug_disable_xul_cache();
}
return false;
}();
if (knownCacheable) {
MOZ_ASSERT(!info.mExpirationTime);
MOZ_ASSERT(!info.mMustRevalidate);
info.mExpirationTime = Some(0); // 0 means "doesn't expire".
}
return info;
}
nsCString nsContentUtils::TruncatedURLForDisplay(nsIURI* aURL,
uint32_t aMaxLen) {
nsCString spec;
if (aURL) {
aURL->GetSpec(spec);
spec.Truncate(std::min(aMaxLen, spec.Length()));
}
return spec;
}
namespace mozilla {
std::ostream& operator<<(std::ostream& aOut,
const PreventDefaultResult aPreventDefaultResult) {
switch (aPreventDefaultResult) {
case PreventDefaultResult::No:
aOut << "unhandled";
break;
case PreventDefaultResult::ByContent:
aOut << "handled-by-content";
break;
case PreventDefaultResult::ByChrome:
aOut << "handled-by-chrome";
break;
}
return aOut;
}
} // namespace mozilla
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