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gecko-dev/dom/base/nsCopySupport.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/. */
#include "nsCopySupport.h"
#include "nsIDocumentEncoder.h"
#include "nsISupports.h"
#include "nsIContent.h"
#include "nsIComponentManager.h"
#include "nsIServiceManager.h"
#include "nsIClipboard.h"
#include "nsIFormControl.h"
#include "nsWidgetsCID.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsRange.h"
#include "imgIContainer.h"
#include "imgIRequest.h"
#include "nsIPresShell.h"
#include "nsFocusManager.h"
#include "mozilla/dom/DataTransfer.h"
#include "nsIDocShell.h"
#include "nsIContentViewerEdit.h"
#include "nsIClipboardHelper.h"
#include "nsISelectionController.h"
#include "nsPIDOMWindow.h"
#include "mozilla/dom/Document.h"
#include "nsIHTMLDocument.h"
#include "nsGkAtoms.h"
#include "nsIFrame.h"
#include "nsIURI.h"
#include "nsIURIMutator.h"
#include "nsISimpleEnumerator.h"
// image copy stuff
#include "nsIImageLoadingContent.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsContentUtils.h"
#include "nsContentCID.h"
#ifdef XP_WIN
# include "nsCExternalHandlerService.h"
# include "nsEscape.h"
# include "nsIMIMEInfo.h"
# include "nsIMIMEService.h"
# include "nsIURL.h"
# include "nsReadableUtils.h"
# include "nsXULAppAPI.h"
#endif
#include "mozilla/ContentEvents.h"
#include "mozilla/dom/Element.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/IntegerRange.h"
using namespace mozilla;
using namespace mozilla::dom;
static NS_DEFINE_CID(kCClipboardCID, NS_CLIPBOARD_CID);
static NS_DEFINE_CID(kCTransferableCID, NS_TRANSFERABLE_CID);
static NS_DEFINE_CID(kHTMLConverterCID, NS_HTMLFORMATCONVERTER_CID);
// copy string data onto the transferable
static nsresult AppendString(nsITransferable* aTransferable,
const nsAString& aString, const char* aFlavor);
// copy HTML node data
static nsresult AppendDOMNode(nsITransferable* aTransferable,
nsINode* aDOMNode);
#ifdef XP_WIN
// copy image as file promise onto the transferable
static nsresult AppendImagePromise(nsITransferable* aTransferable,
imgIRequest* aImgRequest,
nsIImageLoadingContent* aImageElement);
#endif
// Helper used for HTMLCopy and GetTransferableForSelection since both routines
// share common code.
static nsresult SelectionCopyHelper(Selection* aSel, Document* aDoc,
bool doPutOnClipboard, int16_t aClipboardID,
uint32_t aFlags,
nsITransferable** aTransferable) {
// Clear the output parameter for the transferable, if provided.
if (aTransferable) {
*aTransferable = nullptr;
}
nsresult rv;
nsCOMPtr<nsIDocumentEncoder> docEncoder;
docEncoder = do_createHTMLCopyEncoder();
// note that we assign text/unicode as mime type, but in fact
// nsHTMLCopyEncoder ignore it and use text/html or text/plain depending where
// the selection is. if it is a selection into input/textarea element or in a
// html content with pre-wrap style : text/plain. Otherwise text/html. see
// nsHTMLCopyEncoder::SetSelection
nsAutoString mimeType;
mimeType.AssignLiteral(kUnicodeMime);
// Do the first and potentially trial encoding as preformatted and raw.
uint32_t flags = aFlags | nsIDocumentEncoder::OutputPreformatted |
nsIDocumentEncoder::OutputRaw |
nsIDocumentEncoder::OutputForPlainTextClipboardCopy;
rv = docEncoder->Init(aDoc, mimeType, flags);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->SetSelection(aSel);
NS_ENSURE_SUCCESS(rv, rv);
// SetSelection set the mime type to text/plain if the selection is inside a
// text widget.
rv = docEncoder->GetMimeType(mimeType);
NS_ENSURE_SUCCESS(rv, rv);
bool selForcedTextPlain = mimeType.EqualsLiteral(kTextMime);
nsAutoString buf;
rv = docEncoder->EncodeToString(buf);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->GetMimeType(mimeType);
NS_ENSURE_SUCCESS(rv, rv);
if (!selForcedTextPlain && mimeType.EqualsLiteral(kTextMime)) {
// SetSelection and EncodeToString use this case to signal that text/plain
// was forced because the document is either not an nsIHTMLDocument or it's
// XHTML. We want to pretty print XHTML but not non-nsIHTMLDocuments.
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(aDoc);
if (!htmlDoc) {
selForcedTextPlain = true;
}
}
// The mime type is ultimately text/html if the encoder successfully encoded
// the selection as text/html.
bool encodedTextHTML = mimeType.EqualsLiteral(kHTMLMime);
// First, prepare the text/plain clipboard flavor.
nsAutoString textPlainBuf;
if (selForcedTextPlain) {
// Nothing to do. buf contains the final, preformatted, raw text/plain.
textPlainBuf.Assign(buf);
} else {
// Redo the encoding, but this time use pretty printing.
flags = nsIDocumentEncoder::OutputSelectionOnly |
nsIDocumentEncoder::OutputAbsoluteLinks |
nsIDocumentEncoder::SkipInvisibleContent |
nsIDocumentEncoder::OutputDropInvisibleBreak |
(aFlags & (nsIDocumentEncoder::OutputNoScriptContent |
nsIDocumentEncoder::OutputRubyAnnotation));
mimeType.AssignLiteral(kTextMime);
rv = docEncoder->Init(aDoc, mimeType, flags);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->SetSelection(aSel);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->EncodeToString(textPlainBuf);
NS_ENSURE_SUCCESS(rv, rv);
}
// Second, prepare the text/html flavor.
nsAutoString textHTMLBuf;
nsAutoString htmlParentsBuf;
nsAutoString htmlInfoBuf;
if (encodedTextHTML) {
// Redo the encoding, but this time use the passed-in flags.
// Don't allow wrapping of CJK strings.
mimeType.AssignLiteral(kHTMLMime);
rv = docEncoder->Init(
aDoc, mimeType,
aFlags | nsIDocumentEncoder::OutputDisallowLineBreaking);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->SetSelection(aSel);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->EncodeToStringWithContext(htmlParentsBuf, htmlInfoBuf,
textHTMLBuf);
NS_ENSURE_SUCCESS(rv, rv);
}
// Get the Clipboard
nsCOMPtr<nsIClipboard> clipboard;
if (doPutOnClipboard) {
clipboard = do_GetService(kCClipboardCID, &rv);
if (NS_FAILED(rv)) return rv;
}
if ((doPutOnClipboard && clipboard) || aTransferable != nullptr) {
// Create a transferable for putting data on the Clipboard
nsCOMPtr<nsITransferable> trans = do_CreateInstance(kCTransferableCID);
if (trans) {
trans->Init(aDoc->GetLoadContext());
if (encodedTextHTML) {
// Set up a format converter so that clipboard flavor queries work.
// This converter isn't really used for conversions.
nsCOMPtr<nsIFormatConverter> htmlConverter =
do_CreateInstance(kHTMLConverterCID);
trans->SetConverter(htmlConverter);
if (!textHTMLBuf.IsEmpty()) {
// Add the html DataFlavor to the transferable
rv = AppendString(trans, textHTMLBuf, kHTMLMime);
NS_ENSURE_SUCCESS(rv, rv);
}
// Add the htmlcontext DataFlavor to the transferable
// Even if parents is empty string, this flavor should
// be attached to the transferable
rv = AppendString(trans, htmlParentsBuf, kHTMLContext);
NS_ENSURE_SUCCESS(rv, rv);
if (!htmlInfoBuf.IsEmpty()) {
// Add the htmlinfo DataFlavor to the transferable
rv = AppendString(trans, htmlInfoBuf, kHTMLInfo);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!textPlainBuf.IsEmpty()) {
// unicode text
// Add the unicode DataFlavor to the transferable
// If we didn't have this, then nsDataObj::GetData matches
// text/unicode against the kURLMime flavour which is not desirable
// (eg. when pasting into Notepad)
rv = AppendString(trans, textPlainBuf, kUnicodeMime);
NS_ENSURE_SUCCESS(rv, rv);
}
// Try and get source URI of the items that are being dragged
nsIURI* uri = aDoc->GetDocumentURI();
if (uri) {
nsAutoCString spec;
nsresult rv = uri->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
if (!spec.IsEmpty()) {
nsAutoString shortcut;
AppendUTF8toUTF16(spec, shortcut);
// Add the URL DataFlavor to the transferable. Don't use kURLMime,
// as it will cause an unnecessary UniformResourceLocator to be
// added which confuses some apps eg. Outlook 2000 - (See Bug
// 315370). Don't use kURLDataMime, as it will cause a bogus 'url '
// flavor to show up on the Mac clipboard, confusing other apps,
// like Terminal (see bug 336012).
rv = AppendString(trans, shortcut, kURLPrivateMime);
NS_ENSURE_SUCCESS(rv, rv);
}
}
} else {
if (!textPlainBuf.IsEmpty()) {
// Add the unicode DataFlavor to the transferable
rv = AppendString(trans, textPlainBuf, kUnicodeMime);
NS_ENSURE_SUCCESS(rv, rv);
}
}
if (doPutOnClipboard && clipboard) {
// put the transferable on the clipboard
clipboard->SetData(trans, nullptr, aClipboardID);
}
// Return the transferable to the caller if requested.
if (aTransferable != nullptr) {
trans.swap(*aTransferable);
}
}
}
return rv;
}
nsresult nsCopySupport::HTMLCopy(Selection* aSel, Document* aDoc,
int16_t aClipboardID,
bool aWithRubyAnnotation) {
uint32_t flags = nsIDocumentEncoder::SkipInvisibleContent;
if (aWithRubyAnnotation) {
flags |= nsIDocumentEncoder::OutputRubyAnnotation;
}
return SelectionCopyHelper(aSel, aDoc, true, aClipboardID, flags, nullptr);
}
nsresult nsCopySupport::ClearSelectionCache() {
nsresult rv;
nsCOMPtr<nsIClipboard> clipboard = do_GetService(kCClipboardCID, &rv);
clipboard->EmptyClipboard(nsIClipboard::kSelectionCache);
return rv;
}
nsresult nsCopySupport::GetTransferableForSelection(
Selection* aSel, Document* aDoc, nsITransferable** aTransferable) {
return SelectionCopyHelper(aSel, aDoc, false, 0,
nsIDocumentEncoder::SkipInvisibleContent,
aTransferable);
}
nsresult nsCopySupport::GetTransferableForNode(
nsINode* aNode, Document* aDoc, nsITransferable** aTransferable) {
// Make a temporary selection with aNode in a single range.
// XXX We should try to get rid of the Selection object here.
// XXX bug 1245883
RefPtr<Selection> selection = new Selection();
RefPtr<nsRange> range = new nsRange(aNode);
ErrorResult result;
range->SelectNode(*aNode, result);
if (NS_WARN_IF(result.Failed())) {
return result.StealNSResult();
}
selection->AddRangeInternal(*range, aDoc, result);
if (NS_WARN_IF(result.Failed())) {
return result.StealNSResult();
}
// It's not the primary selection - so don't skip invisible content.
uint32_t flags = 0;
return SelectionCopyHelper(selection, aDoc, false, 0, flags, aTransferable);
}
nsresult nsCopySupport::GetContents(const nsACString& aMimeType,
uint32_t aFlags, Selection* aSel,
Document* aDoc, nsAString& outdata) {
nsCOMPtr<nsIDocumentEncoder> docEncoder =
do_createDocumentEncoder(PromiseFlatCString(aMimeType).get());
NS_ENSURE_TRUE(docEncoder, NS_ERROR_FAILURE);
uint32_t flags = aFlags | nsIDocumentEncoder::SkipInvisibleContent;
if (aMimeType.EqualsLiteral("text/plain"))
flags |= nsIDocumentEncoder::OutputPreformatted;
NS_ConvertASCIItoUTF16 unicodeMimeType(aMimeType);
nsresult rv = docEncoder->Init(aDoc, unicodeMimeType, flags);
if (NS_FAILED(rv)) return rv;
if (aSel) {
rv = docEncoder->SetSelection(aSel);
if (NS_FAILED(rv)) return rv;
}
// encode the selection
return docEncoder->EncodeToString(outdata);
}
nsresult nsCopySupport::ImageCopy(nsIImageLoadingContent* aImageElement,
nsILoadContext* aLoadContext,
int32_t aCopyFlags) {
nsresult rv;
// create a transferable for putting data on the Clipboard
nsCOMPtr<nsITransferable> trans(do_CreateInstance(kCTransferableCID, &rv));
NS_ENSURE_SUCCESS(rv, rv);
trans->Init(aLoadContext);
if (aCopyFlags & nsIContentViewerEdit::COPY_IMAGE_TEXT) {
// get the location from the element
nsCOMPtr<nsIURI> uri;
rv = aImageElement->GetCurrentURI(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(uri, NS_ERROR_FAILURE);
nsAutoCString location;
rv = uri->GetSpec(location);
NS_ENSURE_SUCCESS(rv, rv);
// append the string to the transferable
rv = AppendString(trans, NS_ConvertUTF8toUTF16(location), kUnicodeMime);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aCopyFlags & nsIContentViewerEdit::COPY_IMAGE_HTML) {
// append HTML data to the transferable
nsCOMPtr<nsINode> node(do_QueryInterface(aImageElement, &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = AppendDOMNode(trans, node);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aCopyFlags & nsIContentViewerEdit::COPY_IMAGE_DATA) {
// get the image data and its request from the element
nsCOMPtr<imgIRequest> imgRequest;
nsCOMPtr<imgIContainer> image = nsContentUtils::GetImageFromContent(
aImageElement, getter_AddRefs(imgRequest));
NS_ENSURE_TRUE(image, NS_ERROR_FAILURE);
#ifdef XP_WIN
rv = AppendImagePromise(trans, imgRequest, aImageElement);
NS_ENSURE_SUCCESS(rv, rv);
#endif
// copy the image data onto the transferable
rv = trans->SetTransferData(kNativeImageMime, image);
NS_ENSURE_SUCCESS(rv, rv);
}
// get clipboard
nsCOMPtr<nsIClipboard> clipboard(do_GetService(kCClipboardCID, &rv));
NS_ENSURE_SUCCESS(rv, rv);
// check whether the system supports the selection clipboard or not.
bool selectionSupported;
rv = clipboard->SupportsSelectionClipboard(&selectionSupported);
NS_ENSURE_SUCCESS(rv, rv);
// put the transferable on the clipboard
if (selectionSupported) {
rv = clipboard->SetData(trans, nullptr, nsIClipboard::kSelectionClipboard);
NS_ENSURE_SUCCESS(rv, rv);
}
return clipboard->SetData(trans, nullptr, nsIClipboard::kGlobalClipboard);
}
static nsresult AppendString(nsITransferable* aTransferable,
const nsAString& aString, const char* aFlavor) {
nsresult rv;
nsCOMPtr<nsISupportsString> data(
do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = data->SetData(aString);
NS_ENSURE_SUCCESS(rv, rv);
rv = aTransferable->AddDataFlavor(aFlavor);
NS_ENSURE_SUCCESS(rv, rv);
return aTransferable->SetTransferData(aFlavor, data);
}
static nsresult AppendDOMNode(nsITransferable* aTransferable,
nsINode* aDOMNode) {
nsresult rv;
// serializer
nsCOMPtr<nsIDocumentEncoder> docEncoder = do_createHTMLCopyEncoder();
// get document for the encoder
nsCOMPtr<Document> document = aDOMNode->OwnerDoc();
// Note that XHTML is not counted as HTML here, because we can't copy it
// properly (all the copy code for non-plaintext assumes using HTML
// serializers and parsers is OK, and those mess up XHTML).
DebugOnly<nsCOMPtr<nsIHTMLDocument>> htmlDoc =
nsCOMPtr<nsIHTMLDocument>(do_QueryInterface(document, &rv));
NS_ENSURE_SUCCESS(rv, NS_OK);
NS_ENSURE_TRUE(document->IsHTMLDocument(), NS_OK);
// init encoder with document and node
rv =
docEncoder->NativeInit(document, NS_LITERAL_STRING(kHTMLMime),
nsIDocumentEncoder::OutputAbsoluteLinks |
nsIDocumentEncoder::OutputEncodeBasicEntities);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->SetNode(aDOMNode);
NS_ENSURE_SUCCESS(rv, rv);
// serialize to string
nsAutoString html, context, info;
rv = docEncoder->EncodeToStringWithContext(context, info, html);
NS_ENSURE_SUCCESS(rv, rv);
// copy them to the transferable
if (!html.IsEmpty()) {
rv = AppendString(aTransferable, html, kHTMLMime);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!info.IsEmpty()) {
rv = AppendString(aTransferable, info, kHTMLInfo);
NS_ENSURE_SUCCESS(rv, rv);
}
// add a special flavor, even if we don't have html context data
return AppendString(aTransferable, context, kHTMLContext);
}
#ifdef XP_WIN
static nsresult AppendImagePromise(nsITransferable* aTransferable,
imgIRequest* aImgRequest,
nsIImageLoadingContent* aImageElement) {
nsresult rv;
NS_ENSURE_TRUE(aImgRequest, NS_OK);
uint32_t imageStatus;
rv = aImgRequest->GetImageStatus(&imageStatus);
NS_ENSURE_SUCCESS(rv, rv);
if (!(imageStatus & imgIRequest::STATUS_FRAME_COMPLETE) ||
(imageStatus & imgIRequest::STATUS_ERROR)) {
return NS_OK;
}
bool isMultipart;
rv = aImgRequest->GetMultipart(&isMultipart);
NS_ENSURE_SUCCESS(rv, rv);
if (isMultipart) {
return NS_OK;
}
nsCOMPtr<nsINode> node = do_QueryInterface(aImageElement, &rv);
NS_ENSURE_SUCCESS(rv, rv);
// Fix the file extension in the URL if necessary
nsCOMPtr<nsIMIMEService> mimeService =
do_GetService(NS_MIMESERVICE_CONTRACTID);
NS_ENSURE_TRUE(mimeService, NS_OK);
nsCOMPtr<nsIURI> imgUri;
rv = aImgRequest->GetFinalURI(getter_AddRefs(imgUri));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURL> imgUrl = do_QueryInterface(imgUri);
NS_ENSURE_TRUE(imgUrl, NS_OK);
nsAutoCString extension;
rv = imgUrl->GetFileExtension(extension);
NS_ENSURE_SUCCESS(rv, rv);
nsCString mimeType;
rv = aImgRequest->GetMimeType(getter_Copies(mimeType));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIMIMEInfo> mimeInfo;
mimeService->GetFromTypeAndExtension(mimeType, EmptyCString(),
getter_AddRefs(mimeInfo));
NS_ENSURE_TRUE(mimeInfo, NS_OK);
nsAutoCString spec;
rv = imgUrl->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
// pass out the image source string
nsString imageSourceString;
CopyUTF8toUTF16(spec, imageSourceString);
bool validExtension;
if (extension.IsEmpty() ||
NS_FAILED(mimeInfo->ExtensionExists(extension, &validExtension)) ||
!validExtension) {
// Fix the file extension in the URL
nsAutoCString primaryExtension;
mimeInfo->GetPrimaryExtension(primaryExtension);
rv = NS_MutateURI(imgUri)
.Apply(NS_MutatorMethod(&nsIURLMutator::SetFileExtension,
primaryExtension, nullptr))
.Finalize(imgUrl);
NS_ENSURE_SUCCESS(rv, rv);
}
nsAutoCString fileName;
imgUrl->GetFileName(fileName);
NS_UnescapeURL(fileName);
// make the filename safe for the filesystem
fileName.ReplaceChar(FILE_PATH_SEPARATOR FILE_ILLEGAL_CHARACTERS, '-');
nsString imageDestFileName;
CopyUTF8toUTF16(fileName, imageDestFileName);
rv = AppendString(aTransferable, imageSourceString, kFilePromiseURLMime);
NS_ENSURE_SUCCESS(rv, rv);
rv = AppendString(aTransferable, imageDestFileName, kFilePromiseDestFilename);
NS_ENSURE_SUCCESS(rv, rv);
aTransferable->SetRequestingPrincipal(node->NodePrincipal());
aTransferable->SetContentPolicyType(nsIContentPolicy::TYPE_INTERNAL_IMAGE);
// add the dataless file promise flavor
return aTransferable->AddDataFlavor(kFilePromiseMime);
}
#endif // XP_WIN
nsIContent* nsCopySupport::GetSelectionForCopy(Document* aDocument,
Selection** aSelection) {
*aSelection = nullptr;
nsIPresShell* presShell = aDocument->GetShell();
if (!presShell) return nullptr;
nsCOMPtr<nsIContent> focusedContent;
nsCOMPtr<nsISelectionController> selectionController =
presShell->GetSelectionControllerForFocusedContent(
getter_AddRefs(focusedContent));
if (!selectionController) {
return nullptr;
}
RefPtr<Selection> sel = selectionController->GetSelection(
nsISelectionController::SELECTION_NORMAL);
sel.forget(aSelection);
return focusedContent;
}
bool nsCopySupport::CanCopy(Document* aDocument) {
if (!aDocument) return false;
RefPtr<Selection> sel;
GetSelectionForCopy(aDocument, getter_AddRefs(sel));
NS_ENSURE_TRUE(sel, false);
return !sel->IsCollapsed();
}
static bool IsInsideRuby(nsINode* aNode) {
for (; aNode; aNode = aNode->GetParent()) {
if (aNode->IsHTMLElement(nsGkAtoms::ruby)) {
return true;
}
}
return false;
}
static bool IsSelectionInsideRuby(Selection* aSelection) {
uint32_t rangeCount = aSelection->RangeCount();
;
for (auto i : IntegerRange(rangeCount)) {
nsRange* range = aSelection->GetRangeAt(i);
if (!IsInsideRuby(range->GetCommonAncestor())) {
return false;
}
}
return true;
}
static Element* GetElementOrNearestFlattenedTreeParentElement(nsINode* aNode) {
if (!aNode->IsContent()) {
return nullptr;
}
for (nsIContent* content = aNode->AsContent(); content;
content = content->GetFlattenedTreeParent()) {
if (content->IsElement()) {
return content->AsElement();
}
}
return nullptr;
}
bool nsCopySupport::FireClipboardEvent(EventMessage aEventMessage,
int32_t aClipboardType,
nsIPresShell* aPresShell,
Selection* aSelection,
bool* aActionTaken) {
if (aActionTaken) {
*aActionTaken = false;
}
EventMessage originalEventMessage = aEventMessage;
if (originalEventMessage == ePasteNoFormatting) {
originalEventMessage = ePaste;
}
NS_ASSERTION(originalEventMessage == eCut || originalEventMessage == eCopy ||
originalEventMessage == ePaste,
"Invalid clipboard event type");
nsCOMPtr<nsIPresShell> presShell = aPresShell;
if (!presShell) return false;
nsCOMPtr<Document> doc = presShell->GetDocument();
if (!doc) return false;
nsCOMPtr<nsPIDOMWindowOuter> piWindow = doc->GetWindow();
if (!piWindow) return false;
// Event target of clipboard events should be an element node which
// contains selection start container.
RefPtr<Element> targetElement;
// If a selection was not supplied, try to find it.
RefPtr<Selection> sel = aSelection;
if (!sel) {
GetSelectionForCopy(doc, getter_AddRefs(sel));
}
// Retrieve the event target node from the start of the selection.
if (sel) {
nsRange* range = sel->GetRangeAt(0);
if (range) {
targetElement = GetElementOrNearestFlattenedTreeParentElement(
range->GetStartContainer());
}
}
// If there is no selection ranges, use the <body> or <frameset> element.
if (!targetElement) {
targetElement = doc->GetBody();
if (!targetElement) {
return false;
}
}
// It seems to be unsafe to fire an event handler during reflow (bug 393696)
if (!nsContentUtils::IsSafeToRunScript()) {
nsContentUtils::WarnScriptWasIgnored(doc);
return false;
}
nsCOMPtr<nsIDocShell> docShell = piWindow->GetDocShell();
const bool chromeShell =
docShell && docShell->ItemType() == nsIDocShellTreeItem::typeChrome;
// next, fire the cut, copy or paste event
bool doDefault = true;
RefPtr<DataTransfer> clipboardData;
if (chromeShell ||
Preferences::GetBool("dom.event.clipboardevents.enabled", true)) {
clipboardData =
new DataTransfer(doc->GetScopeObject(), aEventMessage,
originalEventMessage == ePaste, aClipboardType);
nsEventStatus status = nsEventStatus_eIgnore;
InternalClipboardEvent evt(true, originalEventMessage);
evt.mClipboardData = clipboardData;
EventDispatcher::Dispatch(targetElement, presShell->GetPresContext(), &evt,
nullptr, &status);
// If the event was cancelled, don't do the clipboard operation
doDefault = (status != nsEventStatus_eConsumeNoDefault);
}
// When this function exits, the event dispatch is over. We want to disconnect
// our DataTransfer, which means setting its mode to `Protected` and clearing
// all stored data, before we return.
auto clearAfter = MakeScopeExit([&] {
if (clipboardData) {
clipboardData->Disconnect();
// NOTE: Disconnect may not actually clear the DataTransfer if the
// dom.events.dataTransfer.protected.enabled pref is not on, so we make
// sure we clear here, as not clearing could provide the DataTransfer
// access to information from the system clipboard at an arbitrary point
// in the future.
if (originalEventMessage == ePaste) {
clipboardData->ClearAll();
}
}
});
// No need to do anything special during a paste. Either an event listener
// took care of it and cancelled the event, or the caller will handle it.
// Return true to indicate that the event wasn't cancelled.
if (originalEventMessage == ePaste) {
if (aActionTaken) {
*aActionTaken = true;
}
return doDefault;
}
// Update the presentation in case the event handler modified the selection,
// see bug 602231.
presShell->FlushPendingNotifications(FlushType::Frames);
if (presShell->IsDestroying()) return false;
// if the event was not cancelled, do the default copy. If the event was
// cancelled, use the data added to the data transfer and copy that instead.
uint32_t count = 0;
if (doDefault) {
// find the focused node
nsIContent* sourceContent = targetElement.get();
if (targetElement->IsInNativeAnonymousSubtree()) {
sourceContent = targetElement->FindFirstNonChromeOnlyAccessContent();
}
// check if we are looking at a password input
nsCOMPtr<nsIFormControl> formControl = do_QueryInterface(sourceContent);
if (formControl) {
if (formControl->ControlType() == NS_FORM_INPUT_PASSWORD) {
return false;
}
}
// when cutting non-editable content, do nothing
// XXX this is probably the wrong editable flag to check
if (originalEventMessage != eCut || targetElement->IsEditable()) {
// get the data from the selection if any
if (sel->IsCollapsed()) {
if (aActionTaken) {
*aActionTaken = true;
}
return false;
}
// XXX Code which decides whether we should copy text with ruby
// annotation is currenct depending on whether each range of the
// selection is inside a same ruby container. But we really should
// expose the full functionality in browser. See bug 1130891.
bool withRubyAnnotation = IsSelectionInsideRuby(sel);
// call the copy code
nsresult rv = HTMLCopy(sel, doc, aClipboardType, withRubyAnnotation);
if (NS_FAILED(rv)) {
return false;
}
} else {
return false;
}
} else if (clipboardData) {
// check to see if any data was put on the data transfer.
count = clipboardData->MozItemCount();
if (count) {
nsCOMPtr<nsIClipboard> clipboard(
do_GetService("@mozilla.org/widget/clipboard;1"));
NS_ENSURE_TRUE(clipboard, false);
nsCOMPtr<nsITransferable> transferable =
clipboardData->GetTransferable(0, doc->GetLoadContext());
NS_ENSURE_TRUE(transferable, false);
// put the transferable on the clipboard
nsresult rv = clipboard->SetData(transferable, nullptr, aClipboardType);
if (NS_FAILED(rv)) {
return false;
}
}
}
// Now that we have copied, update the clipboard commands. This should have
// the effect of updating the enabled state of the paste menu item.
if (doDefault || count) {
piWindow->UpdateCommands(NS_LITERAL_STRING("clipboard"), nullptr, 0);
}
if (aActionTaken) {
*aActionTaken = true;
}
return doDefault;
}
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