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gecko-dev/editor/libeditor/EditorBase.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "EditorBase.h"
#include <stdio.h> // for nullptr, stdout
#include <string.h> // for strcmp
#include "AutoRangeArray.h" // for AutoRangeArray
#include "ChangeAttributeTransaction.h"
#include "CompositionTransaction.h"
#include "DeleteContentTransactionBase.h"
#include "DeleteMultipleRangesTransaction.h"
#include "DeleteNodeTransaction.h"
#include "DeleteRangeTransaction.h"
#include "DeleteTextTransaction.h"
#include "EditAction.h" // for EditSubAction
#include "EditorDOMPoint.h" // for EditorDOMPoint
#include "EditorUtils.h" // for various helper classes.
#include "EditTransactionBase.h" // for EditTransactionBase
#include "EditorEventListener.h" // for EditorEventListener
#include "HTMLEditor.h" // for HTMLEditor
#include "HTMLEditorInlines.h"
#include "HTMLEditUtils.h" // for HTMLEditUtils
#include "InsertNodeTransaction.h" // for InsertNodeTransaction
#include "InsertTextTransaction.h" // for InsertTextTransaction
#include "JoinNodesTransaction.h" // for JoinNodesTransaction
#include "PlaceholderTransaction.h" // for PlaceholderTransaction
#include "SplitNodeTransaction.h" // for SplitNodeTransaction
#include "TextEditor.h" // for TextEditor
#include "ErrorList.h"
#include "gfxFontUtils.h" // for gfxFontUtils
#include "mozilla/Assertions.h"
#include "mozilla/intl/BidiEmbeddingLevel.h"
#include "mozilla/BasePrincipal.h" // for BasePrincipal
#include "mozilla/CheckedInt.h" // for CheckedInt
#include "mozilla/ComposerCommandsUpdater.h" // for ComposerCommandsUpdater
#include "mozilla/ContentEvents.h" // for InternalClipboardEvent
#include "mozilla/DebugOnly.h" // for DebugOnly
#include "mozilla/EditorSpellCheck.h" // for EditorSpellCheck
#include "mozilla/Encoding.h" // for Encoding (used in Document::GetDocumentCharacterSet)
#include "mozilla/EventDispatcher.h" // for EventChainPreVisitor, etc.
#include "mozilla/FlushType.h" // for FlushType::Frames
#include "mozilla/IMEContentObserver.h" // for IMEContentObserver
#include "mozilla/IMEStateManager.h" // for IMEStateManager
#include "mozilla/InputEventOptions.h" // for InputEventOptions
#include "mozilla/IntegerRange.h" // for IntegerRange
#include "mozilla/InternalMutationEvent.h" // for NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED
#include "mozilla/mozalloc.h" // for operator new, etc.
#include "mozilla/mozInlineSpellChecker.h" // for mozInlineSpellChecker
#include "mozilla/mozSpellChecker.h" // for mozSpellChecker
#include "mozilla/Preferences.h" // for Preferences
#include "mozilla/PresShell.h" // for PresShell
#include "mozilla/RangeBoundary.h" // for RawRangeBoundary, RangeBoundary
#include "mozilla/Services.h" // for GetObserverService
#include "mozilla/StaticPrefs_bidi.h" // for StaticPrefs::bidi_*
#include "mozilla/StaticPrefs_dom.h" // for StaticPrefs::dom_*
#include "mozilla/StaticPrefs_editor.h" // for StaticPrefs::editor_*
#include "mozilla/StaticPrefs_layout.h" // for StaticPrefs::layout_*
#include "mozilla/TextComposition.h" // for TextComposition
#include "mozilla/TextControlElement.h" // for TextControlElement
#include "mozilla/TextInputListener.h" // for TextInputListener
#include "mozilla/TextServicesDocument.h" // for TextServicesDocument
#include "mozilla/TextEvents.h"
#include "mozilla/TransactionManager.h" // for TransactionManager
#include "mozilla/dom/AbstractRange.h" // for AbstractRange
#include "mozilla/dom/Attr.h" // for Attr
#include "mozilla/dom/BrowsingContext.h" // for BrowsingContext
#include "mozilla/dom/CharacterData.h" // for CharacterData
#include "mozilla/dom/DataTransfer.h" // for DataTransfer
#include "mozilla/dom/Document.h" // for Document
#include "mozilla/dom/DocumentInlines.h" // for GetObservingPresShell
#include "mozilla/dom/DragEvent.h" // for DragEvent
#include "mozilla/dom/Element.h" // for Element, nsINode::AsElement
#include "mozilla/dom/EventTarget.h" // for EventTarget
#include "mozilla/dom/HTMLBodyElement.h"
#include "mozilla/dom/HTMLBRElement.h"
#include "mozilla/dom/Selection.h" // for Selection, etc.
#include "mozilla/dom/StaticRange.h" // for StaticRange
#include "mozilla/dom/Text.h"
#include "mozilla/dom/Event.h"
#include "nsAString.h" // for nsAString::Length, etc.
#include "nsCCUncollectableMarker.h" // for nsCCUncollectableMarker
#include "nsCaret.h" // for nsCaret
#include "nsCaseTreatment.h"
#include "nsCharTraits.h" // for NS_IS_HIGH_SURROGATE, etc.
#include "nsContentUtils.h" // for nsContentUtils
#include "nsCopySupport.h" // for nsCopySupport
#include "nsDOMString.h" // for DOMStringIsNull
#include "nsDebug.h" // for NS_WARNING, etc.
#include "nsError.h" // for NS_OK, etc.
#include "nsFocusManager.h" // for nsFocusManager
#include "nsFrameSelection.h" // for nsFrameSelection
#include "nsGenericHTMLElement.h" // for nsGenericHTMLElement
#include "nsGkAtoms.h" // for nsGkAtoms, nsGkAtoms::dir
#include "nsIClipboard.h" // for nsIClipboard
#include "nsIContent.h" // for nsIContent
#include "nsIContentInlines.h" // for nsINode::IsInDesignMode()
#include "nsIDocumentEncoder.h" // for nsIDocumentEncoder
#include "nsIDocumentStateListener.h" // for nsIDocumentStateListener
#include "nsIDocShell.h" // for nsIDocShell
#include "nsIEditActionListener.h" // for nsIEditActionListener
#include "nsIFrame.h" // for nsIFrame
#include "nsIInlineSpellChecker.h" // for nsIInlineSpellChecker, etc.
#include "nsNameSpaceManager.h" // for kNameSpaceID_None, etc.
#include "nsINode.h" // for nsINode, etc.
#include "nsISelectionController.h" // for nsISelectionController, etc.
#include "nsISelectionDisplay.h" // for nsISelectionDisplay, etc.
#include "nsISupports.h" // for nsISupports
#include "nsISupportsUtils.h" // for NS_ADDREF, NS_IF_ADDREF
#include "nsITransferable.h" // for nsITransferable
#include "nsIWeakReference.h" // for nsISupportsWeakReference
#include "nsIWidget.h" // for nsIWidget, IMEState, etc.
#include "nsPIDOMWindow.h" // for nsPIDOMWindow
#include "nsPresContext.h" // for nsPresContext
#include "nsRange.h" // for nsRange
#include "nsReadableUtils.h" // for EmptyString, ToNewCString
#include "nsString.h" // for nsAutoString, nsString, etc.
#include "nsStringFwd.h" // for nsString
#include "nsStyleConsts.h" // for StyleDirection::Rtl, etc.
#include "nsStyleStruct.h" // for nsStyleDisplay, nsStyleText, etc.
#include "nsStyleStructFwd.h" // for nsIFrame::StyleUIReset, etc.
#include "nsTextNode.h" // for nsTextNode
#include "nsThreadUtils.h" // for nsRunnable
#include "prtime.h" // for PR_Now
class nsIOutputStream;
class nsITransferable;
namespace mozilla {
using namespace dom;
using namespace widget;
using EmptyCheckOption = HTMLEditUtils::EmptyCheckOption;
using LeafNodeType = HTMLEditUtils::LeafNodeType;
using LeafNodeTypes = HTMLEditUtils::LeafNodeTypes;
using WalkTreeOption = HTMLEditUtils::WalkTreeOption;
/*****************************************************************************
* mozilla::EditorBase
*****************************************************************************/
template EditorDOMPoint EditorBase::GetFirstIMESelectionStartPoint() const;
template EditorRawDOMPoint EditorBase::GetFirstIMESelectionStartPoint() const;
template EditorDOMPoint EditorBase::GetLastIMESelectionEndPoint() const;
template EditorRawDOMPoint EditorBase::GetLastIMESelectionEndPoint() const;
template Result<CreateContentResult, nsresult>
EditorBase::InsertNodeWithTransaction(nsIContent& aContentToInsert,
const EditorDOMPoint& aPointToInsert);
template Result<CreateElementResult, nsresult>
EditorBase::InsertNodeWithTransaction(Element& aContentToInsert,
const EditorDOMPoint& aPointToInsert);
template Result<CreateTextResult, nsresult>
EditorBase::InsertNodeWithTransaction(Text& aContentToInsert,
const EditorDOMPoint& aPointToInsert);
template EditorDOMPoint EditorBase::GetFirstSelectionStartPoint() const;
template EditorRawDOMPoint EditorBase::GetFirstSelectionStartPoint() const;
template EditorDOMPoint EditorBase::GetFirstSelectionEndPoint() const;
template EditorRawDOMPoint EditorBase::GetFirstSelectionEndPoint() const;
template EditorDOMPoint EditorBase::FindBetterInsertionPoint(
const EditorDOMPoint& aPoint) const;
template EditorRawDOMPoint EditorBase::FindBetterInsertionPoint(
const EditorRawDOMPoint& aPoint) const;
template EditorBase::AutoCaretBidiLevelManager::AutoCaretBidiLevelManager(
const EditorBase& aEditorBase, nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPoint& aPointAtCaret);
template EditorBase::AutoCaretBidiLevelManager::AutoCaretBidiLevelManager(
const EditorBase& aEditorBase, nsIEditor::EDirection aDirectionAndAmount,
const EditorRawDOMPoint& aPointAtCaret);
EditorBase::EditorBase(EditorType aEditorType)
: mEditActionData(nullptr),
mPlaceholderName(nullptr),
mModCount(0),
mFlags(0),
mUpdateCount(0),
mPlaceholderBatch(0),
mWrapColumn(0),
mNewlineHandling(StaticPrefs::editor_singleLine_pasteNewlines()),
mCaretStyle(StaticPrefs::layout_selection_caret_style()),
mDocDirtyState(-1),
mSpellcheckCheckboxState(eTriUnset),
mInitSucceeded(false),
mAllowsTransactionsToChangeSelection(true),
mDidPreDestroy(false),
mDidPostCreate(false),
mDispatchInputEvent(true),
mIsInEditSubAction(false),
mHidingCaret(false),
mSpellCheckerDictionaryUpdated(true),
mIsHTMLEditorClass(aEditorType == EditorType::HTML) {
#ifdef XP_WIN
if (!mCaretStyle && !IsTextEditor()) {
// Wordpad-like caret behavior.
mCaretStyle = 1;
}
#endif // #ifdef XP_WIN
if (mNewlineHandling < nsIEditor::eNewlinesPasteIntact ||
mNewlineHandling > nsIEditor::eNewlinesStripSurroundingWhitespace) {
mNewlineHandling = nsIEditor::eNewlinesPasteToFirst;
}
}
EditorBase::~EditorBase() {
MOZ_ASSERT(!IsInitialized() || mDidPreDestroy,
"Why PreDestroy hasn't been called?");
if (mComposition) {
mComposition->OnEditorDestroyed();
mComposition = nullptr;
}
// If this editor is still hiding the caret, we need to restore it.
HideCaret(false);
mTransactionManager = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_CLASS(EditorBase)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(EditorBase)
// Remove event listeners first since EditorEventListener may need
// mDocument, mEventTarget, etc.
if (tmp->mEventListener) {
tmp->mEventListener->Disconnect();
tmp->mEventListener = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK(mRootElement)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSelectionController)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocument)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mIMEContentObserver)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mInlineSpellChecker)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mTextServicesDocument)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mTextInputListener)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mTransactionManager)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mActionListeners)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocStateListeners)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mEventTarget)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPlaceholderTransaction)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mCachedDocumentEncoder)
NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_REFERENCE
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(EditorBase)
Document* currentDoc =
tmp->mRootElement ? tmp->mRootElement->GetUncomposedDoc() : nullptr;
if (currentDoc && nsCCUncollectableMarker::InGeneration(
cb, currentDoc->GetMarkedCCGeneration())) {
return NS_SUCCESS_INTERRUPTED_TRAVERSE;
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRootElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSelectionController)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocument)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mIMEContentObserver)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mInlineSpellChecker)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTextServicesDocument)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTextInputListener)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTransactionManager)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mActionListeners)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDocStateListeners)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEventTarget)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEventListener)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPlaceholderTransaction)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mCachedDocumentEncoder)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(EditorBase)
NS_INTERFACE_MAP_ENTRY(nsISelectionListener)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_ENTRY(nsIEditor)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIEditor)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(EditorBase)
NS_IMPL_CYCLE_COLLECTING_RELEASE(EditorBase)
nsresult EditorBase::InitInternal(Document& aDocument, Element* aRootElement,
nsISelectionController& aSelectionController,
uint32_t aFlags) {
MOZ_ASSERT_IF(
!mEditActionData ||
!mEditActionData->HasEditorDestroyedDuringHandlingEditAction(),
GetTopLevelEditSubAction() == EditSubAction::eNone);
// First only set flags, but other stuff shouldn't be initialized now.
// Note that SetFlags() will be called by PostCreate().
mFlags = aFlags;
mDocument = &aDocument;
// nsISelectionController should be stored only when we're a `TextEditor`.
// Otherwise, in `HTMLEditor`, it's `PresShell`, and grabbing it causes
// a circular reference and memory leak.
// XXX Should we move `mSelectionController to `TextEditor`?
MOZ_ASSERT_IF(!IsTextEditor(), &aSelectionController == GetPresShell());
if (IsTextEditor()) {
MOZ_ASSERT(&aSelectionController != GetPresShell());
mSelectionController = &aSelectionController;
}
if (mEditActionData) {
// During edit action, selection is cached. But this selection is invalid
// now since selection controller is updated, so we have to update this
// cache.
Selection* selection = aSelectionController.GetSelection(
nsISelectionController::SELECTION_NORMAL);
NS_WARNING_ASSERTION(selection,
"SelectionController::GetSelection() failed");
if (selection) {
mEditActionData->UpdateSelectionCache(*selection);
}
}
// set up root element if we are passed one.
if (aRootElement) {
mRootElement = aRootElement;
}
// If this is an editor for <input> or <textarea>, the text node which
// has composition string is always recreated with same content. Therefore,
// we need to nodify mComposition of text node destruction and replacing
// composing string when this receives eCompositionChange event next time.
if (mComposition && mComposition->GetContainerTextNode() &&
!mComposition->GetContainerTextNode()->IsInComposedDoc()) {
mComposition->OnTextNodeRemoved();
}
// Show the caret.
DebugOnly<nsresult> rvIgnored = aSelectionController.SetCaretReadOnly(false);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsISelectionController::SetCaretReadOnly(false) failed, but ignored");
// Show all the selection reflected to user.
rvIgnored =
aSelectionController.SetSelectionFlags(nsISelectionDisplay::DISPLAY_ALL);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsISelectionController::SetSelectionFlags("
"nsISelectionDisplay::DISPLAY_ALL) failed, but ignored");
MOZ_ASSERT(IsInitialized());
AutoEditActionDataSetter editActionData(*this, EditAction::eInitializing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_FAILURE;
}
SelectionRef().AddSelectionListener(this);
// Make sure that the editor will be destroyed properly
mDidPreDestroy = false;
// Make sure that the editor will be created properly
mDidPostCreate = false;
return NS_OK;
}
nsresult EditorBase::EnsureEmptyTextFirstChild() {
MOZ_ASSERT(IsTextEditor());
RefPtr<Element> root = GetRoot();
nsIContent* firstChild = root->GetFirstChild();
if (!firstChild || !firstChild->IsText()) {
RefPtr<nsTextNode> newTextNode = CreateTextNode(u""_ns);
if (!newTextNode) {
NS_WARNING("EditorBase::CreateTextNode() failed");
return NS_ERROR_UNEXPECTED;
}
IgnoredErrorResult ignoredError;
root->InsertChildBefore(newTextNode, root->GetFirstChild(), true,
ignoredError);
MOZ_ASSERT(!ignoredError.Failed());
}
return NS_OK;
}
nsresult EditorBase::PostCreateInternal() {
MOZ_ASSERT(IsEditActionDataAvailable());
// Synchronize some stuff for the flags. SetFlags() will initialize
// something by the flag difference. This is first time of that, so, all
// initializations must be run. For such reason, we need to invert mFlags
// value first.
mFlags = ~mFlags;
nsresult rv = SetFlags(~mFlags);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::SetFlags() failed");
return EditorBase::ToGenericNSResult(rv);
}
// These operations only need to happen on the first PostCreate call
if (!mDidPostCreate) {
mDidPostCreate = true;
// Set up listeners
CreateEventListeners();
nsresult rv = InstallEventListeners();
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::InstallEventListeners() failed");
return EditorBase::ToGenericNSResult(rv);
}
// nuke the modification count, so the doc appears unmodified
// do this before we notify listeners
DebugOnly<nsresult> rvIgnored = ResetModificationCount();
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::ResetModificationCount() failed, but ignored");
// update the UI with our state
rvIgnored = NotifyDocumentListeners(eDocumentCreated);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"EditorBase::NotifyDocumentListeners(eDocumentCreated)"
" failed, but ignored");
rvIgnored = NotifyDocumentListeners(eDocumentStateChanged);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"EditorBase::NotifyDocumentListeners("
"eDocumentStateChanged) failed, but ignored");
}
// update nsTextStateManager and caret if we have focus
if (RefPtr<Element> focusedElement = GetFocusedElement()) {
DebugOnly<nsresult> rvIgnored = InitializeSelection(*focusedElement);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::InitializeSelection() failed, but ignored");
// If the text control gets reframed during focus, Focus() would not be
// called, so take a chance here to see if we need to spell check the text
// control.
nsresult rv = FlushPendingSpellCheck();
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::FlushPendingSpellCheck() caused destroying the editor");
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::FlushPendingSpellCheck() failed, but ignored");
IMEState newState;
rv = GetPreferredIMEState(&newState);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::GetPreferredIMEState() failed");
return NS_OK;
}
IMEStateManager::UpdateIMEState(newState, focusedElement, *this);
}
// FYI: This call might cause destroying this editor.
IMEStateManager::OnEditorInitialized(*this);
return NS_OK;
}
void EditorBase::SetTextInputListener(TextInputListener* aTextInputListener) {
MOZ_ASSERT(!mTextInputListener || !aTextInputListener ||
mTextInputListener == aTextInputListener);
mTextInputListener = aTextInputListener;
}
void EditorBase::SetIMEContentObserver(
IMEContentObserver* aIMEContentObserver) {
MOZ_ASSERT(!mIMEContentObserver || !aIMEContentObserver ||
mIMEContentObserver == aIMEContentObserver);
mIMEContentObserver = aIMEContentObserver;
}
void EditorBase::CreateEventListeners() {
// Don't create the handler twice
if (!mEventListener) {
mEventListener = new EditorEventListener();
}
}
nsresult EditorBase::InstallEventListeners() {
if (NS_WARN_IF(!IsInitialized()) || NS_WARN_IF(!mEventListener)) {
return NS_ERROR_NOT_INITIALIZED;
}
// Initialize the event target.
mEventTarget = GetExposedRoot();
if (NS_WARN_IF(!mEventTarget)) {
return NS_ERROR_NOT_AVAILABLE;
}
nsresult rv = mEventListener->Connect(this);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorEventListener::Connect() failed");
if (mComposition) {
// If mComposition has already been destroyed, we should forget it.
// This may happen if it ended while we don't listen to composition
// events.
if (mComposition->Destroyed()) {
// XXX We may need to fix existing composition transaction here.
// However, this may be called when it's not safe.
// Perhaps, we should stop handling composition with events.
mComposition = nullptr;
}
// Otherwise, Restart to handle composition with new editor contents.
else {
mComposition->StartHandlingComposition(this);
}
}
return rv;
}
void EditorBase::RemoveEventListeners() {
if (!IsInitialized() || !mEventListener) {
return;
}
mEventListener->Disconnect();
if (mComposition) {
// Even if this is called, don't release mComposition because this is
// may be reused after reframing.
mComposition->EndHandlingComposition(this);
}
mEventTarget = nullptr;
}
bool EditorBase::IsListeningToEvents() const {
return IsInitialized() && mEventListener &&
!mEventListener->DetachedFromEditor();
}
bool EditorBase::GetDesiredSpellCheckState() {
// Check user override on this element
if (mSpellcheckCheckboxState != eTriUnset) {
return (mSpellcheckCheckboxState == eTriTrue);
}
// Check user preferences
int32_t spellcheckLevel = Preferences::GetInt("layout.spellcheckDefault", 1);
if (!spellcheckLevel) {
return false; // Spellchecking forced off globally
}
if (!CanEnableSpellCheck()) {
return false;
}
PresShell* presShell = GetPresShell();
if (presShell) {
nsPresContext* context = presShell->GetPresContext();
if (context && !context->IsDynamic()) {
return false;
}
}
// Check DOM state
nsCOMPtr<nsIContent> content = GetExposedRoot();
if (!content) {
return false;
}
auto element = nsGenericHTMLElement::FromNode(content);
if (!element) {
return false;
}
if (!IsInPlaintextMode()) {
// Some of the page content might be editable and some not, if spellcheck=
// is explicitly set anywhere, so if there's anything editable on the page,
// return true and let the spellchecker figure it out.
Document* doc = content->GetComposedDoc();
return doc && doc->IsEditingOn();
}
return element->Spellcheck();
}
void EditorBase::PreDestroyInternal() {
MOZ_ASSERT(!mDidPreDestroy);
mInitSucceeded = false;
Selection* selection = GetSelection();
if (selection) {
selection->RemoveSelectionListener(this);
}
IMEStateManager::OnEditorDestroying(*this);
// Let spellchecker clean up its observers etc. It is important not to
// actually free the spellchecker here, since the spellchecker could have
// caused flush notifications, which could have gotten here if a textbox
// is being removed. Setting the spellchecker to nullptr could free the
// object that is still in use! It will be freed when the editor is
// destroyed.
if (mInlineSpellChecker) {
DebugOnly<nsresult> rvIgnored =
mInlineSpellChecker->Cleanup(IsTextEditor());
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"mozInlineSpellChecker::Cleanup() failed, but ignored");
}
// tell our listeners that the doc is going away
DebugOnly<nsresult> rvIgnored =
NotifyDocumentListeners(eDocumentToBeDestroyed);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"EditorBase::NotifyDocumentListeners("
"eDocumentToBeDestroyed) failed, but ignored");
// Unregister event listeners
RemoveEventListeners();
// If this editor is still hiding the caret, we need to restore it.
HideCaret(false);
mActionListeners.Clear();
mDocStateListeners.Clear();
mInlineSpellChecker = nullptr;
mTextServicesDocument = nullptr;
mTextInputListener = nullptr;
mSpellcheckCheckboxState = eTriUnset;
mRootElement = nullptr;
// Transaction may grab this instance. Therefore, they should be released
// here for stopping the circular reference with this instance.
if (mTransactionManager) {
DebugOnly<bool> disabledUndoRedo = DisableUndoRedo();
NS_WARNING_ASSERTION(disabledUndoRedo,
"EditorBase::DisableUndoRedo() failed, but ignored");
mTransactionManager = nullptr;
}
if (mEditActionData) {
mEditActionData->OnEditorDestroy();
}
mDidPreDestroy = true;
}
NS_IMETHODIMP EditorBase::GetFlags(uint32_t* aFlags) {
// NOTE: If you need to override this method, you need to make Flags()
// virtual.
*aFlags = Flags();
return NS_OK;
}
NS_IMETHODIMP EditorBase::SetFlags(uint32_t aFlags) {
if (mFlags == aFlags) {
return NS_OK;
}
// If we're a `TextEditor` instance, the plaintext mode should always be set.
// If we're an `HTMLEditor` instance, either is fine.
MOZ_ASSERT_IF(IsTextEditor(), !!(aFlags & nsIEditor::eEditorPlaintextMask));
// If we're an `HTMLEditor` instance, we cannot treat it as a single line
// editor. So, eEditorSingleLineMask is available only when we're a
// `TextEditor` instance.
MOZ_ASSERT_IF(IsHTMLEditor(), !(aFlags & nsIEditor::eEditorSingleLineMask));
// If we're an `HTMLEditor` instance, we cannot treat it as a password editor.
// So, eEditorPasswordMask is available only when we're a `TextEditor`
// instance.
MOZ_ASSERT_IF(IsHTMLEditor(), !(aFlags & nsIEditor::eEditorPasswordMask));
// eEditorAllowInteraction changes the behavior of `HTMLEditor`. So, it's
// not available with `TextEditor` instance.
MOZ_ASSERT_IF(IsTextEditor(), !(aFlags & nsIEditor::eEditorAllowInteraction));
const bool isCalledByPostCreate = (mFlags == ~aFlags);
// We don't support dynamic password flag change.
MOZ_ASSERT_IF(!isCalledByPostCreate,
!((mFlags ^ aFlags) & nsIEditor::eEditorPasswordMask));
bool spellcheckerWasEnabled = !isCalledByPostCreate && CanEnableSpellCheck();
mFlags = aFlags;
if (!IsInitialized()) {
// If we're initializing, we shouldn't do anything now.
// SetFlags() will be called by PostCreate(),
// we should synchronize some stuff for the flags at that time.
return NS_OK;
}
// The flag change may cause the spellchecker state change
if (CanEnableSpellCheck() != spellcheckerWasEnabled) {
SyncRealTimeSpell();
}
// If this is called from PostCreate(), it will update the IME state if it's
// necessary.
if (!mDidPostCreate) {
return NS_OK;
}
// Might be changing editable state, so, we need to reset current IME state
// if we're focused and the flag change causes IME state change.
if (RefPtr<Element> focusedElement = GetFocusedElement()) {
IMEState newState;
nsresult rv = GetPreferredIMEState(&newState);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::GetPreferredIMEState() failed, but ignored");
if (NS_SUCCEEDED(rv)) {
// NOTE: When the enabled state isn't going to be modified, this method
// is going to do nothing.
IMEStateManager::UpdateIMEState(newState, focusedElement, *this);
}
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetIsSelectionEditable(bool* aIsSelectionEditable) {
if (NS_WARN_IF(!aIsSelectionEditable)) {
return NS_ERROR_INVALID_ARG;
}
*aIsSelectionEditable = IsSelectionEditable();
return NS_OK;
}
bool EditorBase::IsSelectionEditable() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return false;
}
if (IsTextEditor()) {
// XXX we just check that the anchor node is editable at the moment
// we should check that all nodes in the selection are editable
const nsINode* anchorNode = SelectionRef().GetAnchorNode();
return anchorNode && anchorNode->IsContent() && anchorNode->IsEditable();
}
const nsINode* anchorNode = SelectionRef().GetAnchorNode();
const nsINode* focusNode = SelectionRef().GetFocusNode();
if (!anchorNode || !focusNode) {
return false;
}
// if anchorNode or focusNode is in a native anonymous subtree, HTMLEditor
// shouldn't edit content in it.
// XXX This must be a bug of Selection API.
if (MOZ_UNLIKELY(anchorNode->IsInNativeAnonymousSubtree() ||
focusNode->IsInNativeAnonymousSubtree())) {
return false;
}
// Per the editing spec as of June 2012: we have to have a selection whose
// start and end nodes are editable, and which share an ancestor editing
// host. (Bug 766387.)
bool isSelectionEditable = SelectionRef().RangeCount() &&
anchorNode->IsEditable() &&
focusNode->IsEditable();
if (!isSelectionEditable) {
return false;
}
const nsINode* commonAncestor =
SelectionRef().GetAnchorFocusRange()->GetClosestCommonInclusiveAncestor();
while (commonAncestor && !commonAncestor->IsEditable()) {
commonAncestor = commonAncestor->GetParentNode();
}
// If there is no editable common ancestor, return false.
return !!commonAncestor;
}
NS_IMETHODIMP EditorBase::GetIsDocumentEditable(bool* aIsDocumentEditable) {
if (NS_WARN_IF(!aIsDocumentEditable)) {
return NS_ERROR_INVALID_ARG;
}
RefPtr<Document> document = GetDocument();
*aIsDocumentEditable = document && IsModifiable();
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetDocument(Document** aDocument) {
if (NS_WARN_IF(!aDocument)) {
return NS_ERROR_INVALID_ARG;
}
*aDocument = do_AddRef(mDocument).take();
return NS_WARN_IF(!*aDocument) ? NS_ERROR_NOT_INITIALIZED : NS_OK;
}
already_AddRefed<nsIWidget> EditorBase::GetWidget() const {
nsPresContext* presContext = GetPresContext();
if (NS_WARN_IF(!presContext)) {
return nullptr;
}
nsCOMPtr<nsIWidget> widget = presContext->GetRootWidget();
return NS_WARN_IF(!widget) ? nullptr : widget.forget();
}
NS_IMETHODIMP EditorBase::GetContentsMIMEType(nsAString& aContentsMIMEType) {
aContentsMIMEType = mContentMIMEType;
return NS_OK;
}
NS_IMETHODIMP EditorBase::SetContentsMIMEType(
const nsAString& aContentsMIMEType) {
mContentMIMEType.Assign(aContentsMIMEType);
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetSelectionController(
nsISelectionController** aSelectionController) {
if (NS_WARN_IF(!aSelectionController)) {
return NS_ERROR_INVALID_ARG;
}
*aSelectionController = do_AddRef(GetSelectionController()).take();
return NS_WARN_IF(!*aSelectionController) ? NS_ERROR_FAILURE : NS_OK;
}
NS_IMETHODIMP EditorBase::DeleteSelection(EDirection aAction,
EStripWrappers aStripWrappers) {
nsresult rv = DeleteSelectionAsAction(aAction, aStripWrappers);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DeleteSelectionAsAction() failed");
return rv;
}
NS_IMETHODIMP EditorBase::GetSelection(Selection** aSelection) {
nsresult rv = GetSelection(SelectionType::eNormal, aSelection);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::GetSelection(SelectionType::eNormal) failed");
return rv;
}
nsresult EditorBase::GetSelection(SelectionType aSelectionType,
Selection** aSelection) const {
if (NS_WARN_IF(!aSelection)) {
return NS_ERROR_INVALID_ARG;
}
if (IsEditActionDataAvailable()) {
*aSelection = do_AddRef(&SelectionRef()).take();
return NS_OK;
}
nsISelectionController* selectionController = GetSelectionController();
if (NS_WARN_IF(!selectionController)) {
*aSelection = nullptr;
return NS_ERROR_NOT_INITIALIZED;
}
*aSelection = do_AddRef(selectionController->GetSelection(
ToRawSelectionType(aSelectionType)))
.take();
return NS_WARN_IF(!*aSelection) ? NS_ERROR_FAILURE : NS_OK;
}
nsresult EditorBase::DoTransactionInternal(nsITransaction* aTransaction) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!ShouldAlreadyHaveHandledBeforeInputEventDispatching(),
"beforeinput event hasn't been dispatched yet");
if (mPlaceholderBatch && !mPlaceholderTransaction) {
MOZ_DIAGNOSTIC_ASSERT(mPlaceholderName);
mPlaceholderTransaction = PlaceholderTransaction::Create(
*this, *mPlaceholderName, std::move(mSelState));
MOZ_ASSERT(mSelState.isNothing());
// We will recurse, but will not hit this case in the nested call
RefPtr<PlaceholderTransaction> placeholderTransaction =
mPlaceholderTransaction;
DebugOnly<nsresult> rvIgnored =
DoTransactionInternal(placeholderTransaction);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::DoTransactionInternal() failed, but ignored");
if (mTransactionManager) {
if (nsCOMPtr<nsITransaction> topTransaction =
mTransactionManager->PeekUndoStack()) {
if (RefPtr<EditTransactionBase> topTransactionBase =
topTransaction->GetAsEditTransactionBase()) {
if (PlaceholderTransaction* topPlaceholderTransaction =
topTransactionBase->GetAsPlaceholderTransaction()) {
// there is a placeholder transaction on top of the undo stack. It
// is either the one we just created, or an earlier one that we are
// now merging into. From here on out remember this placeholder
// instead of the one we just created.
mPlaceholderTransaction = topPlaceholderTransaction;
}
}
}
}
}
if (aTransaction) {
// XXX: Why are we doing selection specific batching stuff here?
// XXX: Most entry points into the editor have auto variables that
// XXX: should trigger Begin/EndUpdateViewBatch() calls that will make
// XXX: these selection batch calls no-ops.
// XXX:
// XXX: I suspect that this was placed here to avoid multiple
// XXX: selection changed notifications from happening until after
// XXX: the transaction was done. I suppose that can still happen
// XXX: if an embedding application called DoTransaction() directly
// XXX: to pump its own transactions through the system, but in that
// XXX: case, wouldn't we want to use Begin/EndUpdateViewBatch() or
// XXX: its auto equivalent AutoUpdateViewBatch to ensure that
// XXX: selection listeners have access to accurate frame data?
// XXX:
// XXX: Note that if we did add Begin/EndUpdateViewBatch() calls
// XXX: we will need to make sure that they are disabled during
// XXX: the init of the editor for text widgets to avoid layout
// XXX: re-entry during initial reflow. - kin
// get the selection and start a batch change
SelectionBatcher selectionBatcher(SelectionRef(), __FUNCTION__);
if (mTransactionManager) {
RefPtr<TransactionManager> transactionManager(mTransactionManager);
nsresult rv = transactionManager->DoTransaction(aTransaction);
if (NS_FAILED(rv)) {
NS_WARNING("TransactionManager::DoTransaction() failed");
return rv;
}
} else {
nsresult rv = aTransaction->DoTransaction();
if (NS_FAILED(rv)) {
NS_WARNING("nsITransaction::DoTransaction() failed");
return rv;
}
}
DoAfterDoTransaction(aTransaction);
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::EnableUndo(bool aEnable) {
// XXX Should we return NS_ERROR_FAILURE if EdnableUndoRedo() or
// DisableUndoRedo() returns false?
if (aEnable) {
DebugOnly<bool> enabledUndoRedo = EnableUndoRedo();
NS_WARNING_ASSERTION(enabledUndoRedo,
"EditorBase::EnableUndoRedo() failed, but ignored");
return NS_OK;
}
DebugOnly<bool> disabledUndoRedo = DisableUndoRedo();
NS_WARNING_ASSERTION(disabledUndoRedo,
"EditorBase::DisableUndoRedo() failed, but ignored");
return NS_OK;
}
NS_IMETHODIMP EditorBase::ClearUndoRedoXPCOM() {
if (MOZ_UNLIKELY(!ClearUndoRedo())) {
return NS_ERROR_FAILURE; // We're handling a transaction
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::Undo() {
nsresult rv = UndoAsAction(1u);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::UndoAsAction() failed");
return rv;
}
NS_IMETHODIMP EditorBase::UndoAll() {
if (!mTransactionManager) {
return NS_OK;
}
size_t numberOfUndoItems = mTransactionManager->NumberOfUndoItems();
if (!numberOfUndoItems) {
return NS_OK; // no transactions
}
nsresult rv = UndoAsAction(numberOfUndoItems);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::UndoAsAction() failed");
return rv;
}
NS_IMETHODIMP EditorBase::GetUndoRedoEnabled(bool* aIsEnabled) {
MOZ_ASSERT(aIsEnabled);
*aIsEnabled = IsUndoRedoEnabled();
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetCanUndo(bool* aCanUndo) {
MOZ_ASSERT(aCanUndo);
*aCanUndo = CanUndo();
return NS_OK;
}
NS_IMETHODIMP EditorBase::Redo() {
nsresult rv = RedoAsAction(1u);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::RedoAsAction() failed");
return rv;
}
NS_IMETHODIMP EditorBase::GetCanRedo(bool* aCanRedo) {
MOZ_ASSERT(aCanRedo);
*aCanRedo = CanRedo();
return NS_OK;
}
nsresult EditorBase::UndoAsAction(uint32_t aCount, nsIPrincipal* aPrincipal) {
if (aCount == 0 || IsReadonly()) {
return NS_OK;
}
// If we don't have transaction in the undo stack, we shouldn't notify
// anybody of trying to undo since it's not useful notification but we
// need to pay some runtime cost.
if (!CanUndo()) {
return NS_OK;
}
// If there is composition, we shouldn't allow to undo with committing
// composition since Chrome doesn't allow it and it doesn't make sense
// because committing composition causes one transaction and Undo(1)
// undoes the committing composition.
if (GetComposition()) {
return NS_OK;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eUndo, aPrincipal);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoUpdateViewBatch preventSelectionChangeEvent(*this, __FUNCTION__);
NotifyEditorObservers(eNotifyEditorObserversOfBefore);
if (NS_WARN_IF(!CanUndo()) || NS_WARN_IF(Destroyed())) {
return NS_ERROR_FAILURE;
}
rv = NS_OK;
{
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eUndo, nsIEditor::eNone, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return EditorBase::ToGenericNSResult(ignoredError.StealNSResult());
}
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"TextEditor::OnStartToHandleTopLevelEditSubAction() "
"failed, but ignored");
RefPtr<TransactionManager> transactionManager(mTransactionManager);
for (uint32_t i = 0; i < aCount; ++i) {
if (NS_FAILED(transactionManager->Undo())) {
NS_WARNING("TransactionManager::Undo() failed");
break;
}
DoAfterUndoTransaction();
}
if (IsHTMLEditor()) {
rv = AsHTMLEditor()->ReflectPaddingBRElementForEmptyEditor();
}
}
NotifyEditorObservers(eNotifyEditorObserversOfEnd);
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::RedoAsAction(uint32_t aCount, nsIPrincipal* aPrincipal) {
if (aCount == 0 || IsReadonly()) {
return NS_OK;
}
// If we don't have transaction in the redo stack, we shouldn't notify
// anybody of trying to redo since it's not useful notification but we
// need to pay some runtime cost.
if (!CanRedo()) {
return NS_OK;
}
// If there is composition, we shouldn't allow to redo with committing
// composition since Chrome doesn't allow it and it doesn't make sense
// because committing composition causes removing all transactions from
// the redo queue. So, it becomes impossible to redo anything.
if (GetComposition()) {
return NS_OK;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eRedo, aPrincipal);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoUpdateViewBatch preventSelectionChangeEvent(*this, __FUNCTION__);
NotifyEditorObservers(eNotifyEditorObserversOfBefore);
if (NS_WARN_IF(!CanRedo()) || NS_WARN_IF(Destroyed())) {
return NS_ERROR_FAILURE;
}
rv = NS_OK;
{
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eRedo, nsIEditor::eNone, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"TextEditor::OnStartToHandleTopLevelEditSubAction() "
"failed, but ignored");
RefPtr<TransactionManager> transactionManager(mTransactionManager);
for (uint32_t i = 0; i < aCount; ++i) {
if (NS_FAILED(transactionManager->Redo())) {
NS_WARNING("TransactionManager::Redo() failed");
break;
}
DoAfterRedoTransaction();
}
if (IsHTMLEditor()) {
rv = AsHTMLEditor()->ReflectPaddingBRElementForEmptyEditor();
}
}
NotifyEditorObservers(eNotifyEditorObserversOfEnd);
return EditorBase::ToGenericNSResult(rv);
}
NS_IMETHODIMP EditorBase::BeginTransaction() {
AutoEditActionDataSetter editActionData(*this, EditAction::eUnknown);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_FAILURE;
}
BeginTransactionInternal(__FUNCTION__);
return NS_OK;
}
void EditorBase::BeginTransactionInternal(const char* aRequesterFuncName) {
BeginUpdateViewBatch(aRequesterFuncName);
if (NS_WARN_IF(!mTransactionManager)) {
return;
}
RefPtr<TransactionManager> transactionManager(mTransactionManager);
DebugOnly<nsresult> rvIgnored = transactionManager->BeginBatch(nullptr);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"TransactionManager::BeginBatch() failed, but ignored");
}
NS_IMETHODIMP EditorBase::EndTransaction() {
AutoEditActionDataSetter editActionData(*this, EditAction::eUnknown);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_FAILURE;
}
EndTransactionInternal(__FUNCTION__);
return NS_OK;
}
void EditorBase::EndTransactionInternal(const char* aRequesterFuncName) {
if (mTransactionManager) {
RefPtr<TransactionManager> transactionManager(mTransactionManager);
DebugOnly<nsresult> rvIgnored = transactionManager->EndBatch(false);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"TransactionManager::EndBatch() failed, but ignored");
}
EndUpdateViewBatch(aRequesterFuncName);
}
void EditorBase::BeginPlaceholderTransaction(nsStaticAtom& aTransactionName,
const char* aRequesterFuncName) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(mPlaceholderBatch >= 0, "negative placeholder batch count!");
if (!mPlaceholderBatch) {
NotifyEditorObservers(eNotifyEditorObserversOfBefore);
// time to turn on the batch
BeginUpdateViewBatch(aRequesterFuncName);
mPlaceholderTransaction = nullptr;
mPlaceholderName = &aTransactionName;
mSelState.emplace();
mSelState->SaveSelection(SelectionRef());
// Composition transaction can modify multiple nodes and it merges text
// node for ime into single text node.
// So if current selection is into IME text node, it might be failed
// to restore selection by UndoTransaction.
// So we need update selection by range updater.
if (mPlaceholderName == nsGkAtoms::IMETxnName) {
RangeUpdaterRef().RegisterSelectionState(*mSelState);
}
}
mPlaceholderBatch++;
}
void EditorBase::EndPlaceholderTransaction(
ScrollSelectionIntoView aScrollSelectionIntoView,
const char* aRequesterFuncName) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(mPlaceholderBatch > 0,
"zero or negative placeholder batch count when ending batch!");
if (!(--mPlaceholderBatch)) {
// By making the assumption that no reflow happens during the calls
// to EndUpdateViewBatch and ScrollSelectionFocusIntoView, we are able to
// allow the selection to cache a frame offset which is used by the
// caret drawing code. We only enable this cache here; at other times,
// we have no way to know whether reflow invalidates it
// See bugs 35296 and 199412.
SelectionRef().SetCanCacheFrameOffset(true);
// time to turn off the batch
EndUpdateViewBatch(aRequesterFuncName);
// make sure selection is in view
// After ScrollSelectionFocusIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
// XXX Even if we're destroyed, we need to keep handling below because
// this method changes a lot of status. We should rewrite this safer.
if (aScrollSelectionIntoView == ScrollSelectionIntoView::Yes) {
DebugOnly<nsresult> rvIgnored = ScrollSelectionFocusIntoView();
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::ScrollSelectionFocusIntoView() failed, but Ignored");
}
// cached for frame offset are Not available now
SelectionRef().SetCanCacheFrameOffset(false);
if (mSelState) {
// we saved the selection state, but never got to hand it to placeholder
// (else we ould have nulled out this pointer), so destroy it to prevent
// leaks.
if (mPlaceholderName == nsGkAtoms::IMETxnName) {
RangeUpdaterRef().DropSelectionState(*mSelState);
}
mSelState.reset();
}
// We might have never made a placeholder if no action took place.
if (mPlaceholderTransaction) {
// FYI: Disconnect placeholder transaction before dispatching "input"
// event because an input event listener may start other things.
// TODO: We should forget EditActionDataSetter too.
RefPtr<PlaceholderTransaction> placeholderTransaction =
std::move(mPlaceholderTransaction);
DebugOnly<nsresult> rvIgnored =
placeholderTransaction->EndPlaceHolderBatch();
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"PlaceholderTransaction::EndPlaceHolderBatch() failed, but ignored");
// notify editor observers of action but if composing, it's done by
// compositionchange event handler.
if (!mComposition) {
NotifyEditorObservers(eNotifyEditorObserversOfEnd);
}
} else {
NotifyEditorObservers(eNotifyEditorObserversOfCancel);
}
}
}
NS_IMETHODIMP EditorBase::SetShouldTxnSetSelection(bool aShould) {
MakeThisAllowTransactionsToChangeSelection(aShould);
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetDocumentIsEmpty(bool* aDocumentIsEmpty) {
MOZ_ASSERT(aDocumentIsEmpty);
*aDocumentIsEmpty = IsEmpty();
return NS_OK;
}
// XXX: The rule system should tell us which node to select all on (ie, the
// root, or the body)
NS_IMETHODIMP EditorBase::SelectAll() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = SelectAllInternal();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "SelectAllInternal() failed");
// This is low level API for XUL applcation. So, we should return raw
// error code here.
return rv;
}
nsresult EditorBase::SelectAllInternal() {
MOZ_ASSERT(IsInitialized());
DebugOnly<nsresult> rvIgnored = CommitComposition();
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"EditorBase::CommitComposition() failed, but ignored");
// XXX Do we need to keep handling after committing composition causes moving
// focus to different element? Although TextEditor has independent
// selection, so, we may not see any odd behavior even in such case.
nsresult rv = SelectEntireDocument();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::SelectEntireDocument() failed");
return rv;
}
MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHODIMP EditorBase::BeginningOfDocument() {
MOZ_ASSERT(IsTextEditor());
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
// get the root element
RefPtr<Element> rootElement = GetRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_NULL_POINTER;
}
// find first editable thingy
nsCOMPtr<nsIContent> firstEditableLeaf;
// If we're `TextEditor`, the first editable leaf node is a text node or
// padding `<br>` element. In the first case, we need to collapse selection
// into it.
if (rootElement->GetFirstChild() && rootElement->GetFirstChild()->IsText()) {
firstEditableLeaf = rootElement->GetFirstChild();
}
if (!firstEditableLeaf) {
// just the root node, set selection to inside the root
nsresult rv = CollapseSelectionToStartOf(*rootElement);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionToStartOf() failed");
return rv;
}
if (firstEditableLeaf->IsText()) {
// If firstEditableLeaf is text, set selection to beginning of the text
// node.
nsresult rv = CollapseSelectionToStartOf(*firstEditableLeaf);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionToStartOf() failed");
return rv;
}
// Otherwise, it's a leaf node and we set the selection just in front of it.
nsCOMPtr<nsIContent> parent = firstEditableLeaf->GetParent();
if (NS_WARN_IF(!parent)) {
return NS_ERROR_NULL_POINTER;
}
MOZ_ASSERT(
parent->ComputeIndexOf(firstEditableLeaf).valueOr(UINT32_MAX) == 0,
"How come the first node isn't the left most child in its parent?");
nsresult rv = CollapseSelectionToStartOf(*parent);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionToStartOf() failed");
return rv;
}
NS_IMETHODIMP EditorBase::EndOfDocument() { return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHODIMP EditorBase::GetDocumentModified(bool* aOutDocModified) {
if (NS_WARN_IF(!aOutDocModified)) {
return NS_ERROR_INVALID_ARG;
}
int32_t modCount = 0;
DebugOnly<nsresult> rvIgnored = GetModificationCount(&modCount);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::GetModificationCount() failed, but ignored");
*aOutDocModified = (modCount != 0);
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetDocumentCharacterSet(nsACString& aCharacterSet) {
return NS_ERROR_NOT_AVAILABLE;
}
nsresult EditorBase::GetDocumentCharsetInternal(nsACString& aCharset) const {
Document* document = GetDocument();
if (NS_WARN_IF(!document)) {
return NS_ERROR_NOT_INITIALIZED;
}
document->GetDocumentCharacterSet()->Name(aCharset);
return NS_OK;
}
NS_IMETHODIMP EditorBase::SetDocumentCharacterSet(
const nsACString& aCharacterSet) {
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP EditorBase::OutputToString(const nsAString& aFormatType,
uint32_t aDocumentEncoderFlags,
nsAString& aOutputString) {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv =
ComputeValueInternal(aFormatType, aDocumentEncoderFlags, aOutputString);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::ComputeValueInternal() failed");
// This is low level API for XUL application. So, we should return raw
// error code here.
return rv;
}
nsresult EditorBase::ComputeValueInternal(const nsAString& aFormatType,
uint32_t aDocumentEncoderFlags,
nsAString& aOutputString) const {
MOZ_ASSERT(IsEditActionDataAvailable());
// First, let's try to get the value simply only from text node if the
// caller wants plaintext value.
if (aFormatType.LowerCaseEqualsLiteral("text/plain") &&
!(aDocumentEncoderFlags & (nsIDocumentEncoder::OutputSelectionOnly |
nsIDocumentEncoder::OutputWrap))) {
// Shortcut for empty editor case.
if (IsEmpty()) {
aOutputString.Truncate();
return NS_OK;
}
// NOTE: If it's neither <input type="text"> nor <textarea>, e.g., an HTML
// editor which is in plaintext mode (e.g., plaintext email composer on
// Thunderbird), it should be handled by the expensive path.
if (IsTextEditor()) {
// If it's necessary to check selection range or the editor wraps hard,
// we need some complicated handling. In such case, we need to use the
// expensive path.
// XXX Anything else what we cannot return the text node data simply?
Result<EditActionResult, nsresult> result =
AsTextEditor()->ComputeValueFromTextNodeAndBRElement(aOutputString);
if (MOZ_UNLIKELY(result.isErr())) {
NS_WARNING("TextEditor::ComputeValueFromTextNodeAndBRElement() failed");
return result.unwrapErr();
}
if (!result.inspect().Ignored()) {
return NS_OK;
}
}
}
nsAutoCString charset;
nsresult rv = GetDocumentCharsetInternal(charset);
if (NS_FAILED(rv) || charset.IsEmpty()) {
charset.AssignLiteral("windows-1252"); // XXX Why don't we use "UTF-8"?
}
nsCOMPtr<nsIDocumentEncoder> encoder =
GetAndInitDocEncoder(aFormatType, aDocumentEncoderFlags, charset);
if (!encoder) {
NS_WARNING("EditorBase::GetAndInitDocEncoder() failed");
return NS_ERROR_FAILURE;
}
rv = encoder->EncodeToString(aOutputString);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsIDocumentEncoder::EncodeToString() failed");
return rv;
}
already_AddRefed<nsIDocumentEncoder> EditorBase::GetAndInitDocEncoder(
const nsAString& aFormatType, uint32_t aDocumentEncoderFlags,
const nsACString& aCharset) const {
MOZ_ASSERT(IsEditActionDataAvailable());
nsCOMPtr<nsIDocumentEncoder> docEncoder;
if (!mCachedDocumentEncoder ||
!mCachedDocumentEncoderType.Equals(aFormatType)) {
nsAutoCString formatType;
LossyAppendUTF16toASCII(aFormatType, formatType);
docEncoder = do_createDocumentEncoder(PromiseFlatCString(formatType).get());
if (NS_WARN_IF(!docEncoder)) {
return nullptr;
}
mCachedDocumentEncoder = docEncoder;
mCachedDocumentEncoderType = aFormatType;
} else {
docEncoder = mCachedDocumentEncoder;
}
RefPtr<Document> doc = GetDocument();
NS_ASSERTION(doc, "Need a document");
nsresult rv = docEncoder->NativeInit(
doc, aFormatType,
aDocumentEncoderFlags | nsIDocumentEncoder::RequiresReinitAfterOutput);
if (NS_FAILED(rv)) {
NS_WARNING("nsIDocumentEncoder::NativeInit() failed");
return nullptr;
}
if (!aCharset.IsEmpty() && !aCharset.EqualsLiteral("null")) {
DebugOnly<nsresult> rvIgnored = docEncoder->SetCharset(aCharset);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIDocumentEncoder::SetCharset() failed, but ignored");
}
const int32_t wrapWidth = std::max(WrapWidth(), 0);
DebugOnly<nsresult> rvIgnored = docEncoder->SetWrapColumn(wrapWidth);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIDocumentEncoder::SetWrapColumn() failed, but ignored");
// Set the selection, if appropriate.
// We do this either if the OutputSelectionOnly flag is set,
// in which case we use our existing selection ...
if (aDocumentEncoderFlags & nsIDocumentEncoder::OutputSelectionOnly) {
if (NS_FAILED(docEncoder->SetSelection(&SelectionRef()))) {
NS_WARNING("nsIDocumentEncoder::SetSelection() failed");
return nullptr;
}
}
// ... or if the root element is not a body,
// in which case we set the selection to encompass the root.
else {
Element* rootElement = GetRoot();
if (NS_WARN_IF(!rootElement)) {
return nullptr;
}
if (!rootElement->IsHTMLElement(nsGkAtoms::body)) {
if (NS_FAILED(docEncoder->SetContainerNode(rootElement))) {
NS_WARNING("nsIDocumentEncoder::SetContainerNode() failed");
return nullptr;
}
}
}
return docEncoder.forget();
}
bool EditorBase::AreClipboardCommandsUnconditionallyEnabled() const {
Document* document = GetDocument();
return document && document->AreClipboardCommandsUnconditionallyEnabled();
}
bool EditorBase::CheckForClipboardCommandListener(
nsAtom* aCommand, EventMessage aEventMessage) const {
RefPtr<Document> document = GetDocument();
if (!document) {
return false;
}
// We exclude XUL and chrome docs here to maintain current behavior where
// in these cases the editor element alone is expected to handle clipboard
// command availability.
if (!document->AreClipboardCommandsUnconditionallyEnabled()) {
return false;
}
// So in web content documents, "unconditionally" enabled Cut/Copy are not
// really unconditional; they're enabled if there is a listener that wants
// to handle them. What they're not conditional on here is whether there is
// currently a selection in the editor.
RefPtr<PresShell> presShell = document->GetObservingPresShell();
if (!presShell) {
return false;
}
RefPtr<nsPresContext> presContext = presShell->GetPresContext();
if (!presContext) {
return false;
}
RefPtr<EventTarget> et = GetDOMEventTarget();
while (et) {
EventListenerManager* elm = et->GetExistingListenerManager();
if (elm && elm->HasListenersFor(aCommand)) {
return true;
}
InternalClipboardEvent event(true, aEventMessage);
EventChainPreVisitor visitor(presContext, &event, nullptr,
nsEventStatus_eIgnore, false, et);
et->GetEventTargetParent(visitor);
et = visitor.GetParentTarget();
}
return false;
}
Result<EditorBase::ClipboardEventResult, nsresult>
EditorBase::DispatchClipboardEventAndUpdateClipboard(EventMessage aEventMessage,
int32_t aClipboardType) {
MOZ_ASSERT(IsEditActionDataAvailable());
const bool isPasting =
aEventMessage == ePaste || aEventMessage == ePasteNoFormatting;
if (isPasting) {
CommitComposition();
if (NS_WARN_IF(Destroyed())) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
}
RefPtr<PresShell> presShell = GetPresShell();
if (NS_WARN_IF(!presShell)) {
return Err(NS_ERROR_NOT_AVAILABLE);
}
const RefPtr<Selection> sel = [&]() {
if (IsHTMLEditor() && aEventMessage == eCopy &&
SelectionRef().IsCollapsed()) {
// If we don't have a usable selection for copy and we're an HTML
// editor (which is global for the document) try to use the last
// focused selection instead.
return nsCopySupport::GetSelectionForCopy(GetDocument());
}
return do_AddRef(&SelectionRef());
}();
bool actionTaken = false;
const bool doDefault = nsCopySupport::FireClipboardEvent(
aEventMessage, aClipboardType, presShell, sel, &actionTaken);
NotifyOfDispatchingClipboardEvent();
if (NS_WARN_IF(Destroyed())) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (doDefault) {
MOZ_ASSERT(actionTaken);
return ClipboardEventResult::DoDefault;
}
// If we handle a "paste" and nsCopySupport::FireClipboardEvent sets
// actionTaken to "false" means that it's an error. Otherwise, the "paste"
// event is just canceled.
if (isPasting) {
return actionTaken ? ClipboardEventResult::DefaultPreventedOfPaste
: ClipboardEventResult::IgnoredOrError;
}
// If we handle a "copy", actionTaken is set to true only when
// nsCopySupport::FireClipboardEvent does not meet an error.
// If we handle a "cut", actionTaken is set to true only when
// nsCopySupport::FireClipboardEvent does not meet an error and
// - the selection is collapsed in editable elements when the event is not
// canceled.
// - the event is canceled but update the clipboard with the dataTransfer
// of the event.
return actionTaken ? ClipboardEventResult::CopyOrCutHandled
: ClipboardEventResult::IgnoredOrError;
}
NS_IMETHODIMP EditorBase::Cut() {
nsresult rv = CutAsAction();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::CutAsAction() failed");
return rv;
}
nsresult EditorBase::CutAsAction(nsIPrincipal* aPrincipal) {
AutoEditActionDataSetter editActionData(*this, EditAction::eCut, aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
{
RefPtr<nsFocusManager> focusManager = nsFocusManager::GetFocusManager();
if (NS_WARN_IF(!focusManager)) {
return NS_ERROR_UNEXPECTED;
}
const RefPtr<Element> focusedElement = focusManager->GetFocusedElement();
Result<ClipboardEventResult, nsresult> ret =
DispatchClipboardEventAndUpdateClipboard(
eCut, nsIClipboard::kGlobalClipboard);
if (MOZ_UNLIKELY(ret.isErr())) {
NS_WARNING(
"EditorBase::DispatchClipboardEventAndUpdateClipboard(eCut, "
"nsIClipboard::kGlobalClipboard) failed");
return EditorBase::ToGenericNSResult(ret.unwrapErr());
}
switch (ret.unwrap()) {
case ClipboardEventResult::DoDefault:
break;
case ClipboardEventResult::CopyOrCutHandled:
return NS_OK;
case ClipboardEventResult::IgnoredOrError:
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
case ClipboardEventResult::DefaultPreventedOfPaste:
MOZ_ASSERT_UNREACHABLE("Invalid result for eCut");
}
// If focus is changed by a "cut" event listener, we should stop handling
// the cut.
const RefPtr<Element> newFocusedElement = focusManager->GetFocusedElement();
if (MOZ_UNLIKELY(focusedElement != newFocusedElement)) {
if (focusManager->GetFocusedWindow() != GetWindow()) {
return NS_OK;
}
RefPtr<EditorBase> editorBase =
nsContentUtils::GetActiveEditor(GetPresContext());
if (!editorBase || (editorBase->IsHTMLEditor() &&
!editorBase->AsHTMLEditor()->IsActiveInDOMWindow())) {
return NS_OK;
}
if (editorBase != this) {
return NS_OK;
}
}
}
// Dispatch "beforeinput" event after dispatching "cut" event.
nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
// XXX This transaction name is referred by PlaceholderTransaction::Merge()
// so that we need to keep using it here.
AutoPlaceholderBatch treatAsOneTransaction(*this, *nsGkAtoms::DeleteTxnName,
ScrollSelectionIntoView::Yes,
__FUNCTION__);
rv = DeleteSelectionAsSubAction(
eNone, IsTextEditor() ? nsIEditor::eNoStrip : nsIEditor::eStrip);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::DeleteSelectionAsSubAction(eNone) failed, but ignored");
return EditorBase::ToGenericNSResult(rv);
}
NS_IMETHODIMP EditorBase::CanCut(bool* aCanCut) {
if (NS_WARN_IF(!aCanCut)) {
return NS_ERROR_INVALID_ARG;
}
*aCanCut = IsCutCommandEnabled();
return NS_OK;
}
bool EditorBase::IsCutCommandEnabled() const {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return false;
}
if (IsModifiable() && IsCopyToClipboardAllowedInternal()) {
return true;
}
// If there's an event listener for "cut", we always enable the command
// as we don't really know what the listener may want to do in response.
// We look up the event target chain for a possible listener on a parent
// in addition to checking the immediate target.
return CheckForClipboardCommandListener(nsGkAtoms::oncut, eCut);
}
NS_IMETHODIMP EditorBase::Copy() {
AutoEditActionDataSetter editActionData(*this, EditAction::eCopy);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
Result<ClipboardEventResult, nsresult> ret =
DispatchClipboardEventAndUpdateClipboard(eCopy,
nsIClipboard::kGlobalClipboard);
if (MOZ_UNLIKELY(ret.isErr())) {
NS_WARNING(
"EditorBase::DispatchClipboardEventAndUpdateClipboard(eCopy, "
"nsIClipboard::kGlobalClipboard) failed");
return EditorBase::ToGenericNSResult(ret.unwrapErr());
}
switch (ret.unwrap()) {
case ClipboardEventResult::DoDefault:
case ClipboardEventResult::CopyOrCutHandled:
return NS_OK;
case ClipboardEventResult::IgnoredOrError:
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
case ClipboardEventResult::DefaultPreventedOfPaste:
MOZ_ASSERT_UNREACHABLE("Invalid result for eCopy");
}
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP EditorBase::CanCopy(bool* aCanCopy) {
if (NS_WARN_IF(!aCanCopy)) {
return NS_ERROR_INVALID_ARG;
}
*aCanCopy = IsCopyCommandEnabled();
return NS_OK;
}
bool EditorBase::IsCopyCommandEnabled() const {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return false;
}
if (IsCopyToClipboardAllowedInternal()) {
return true;
}
// Like "cut", always enable "copy" if there's a listener.
return CheckForClipboardCommandListener(nsGkAtoms::oncopy, eCopy);
}
NS_IMETHODIMP EditorBase::Paste(int32_t aClipboardType) {
const nsresult rv = PasteAsAction(aClipboardType, DispatchPasteEvent::Yes);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::PasteAsAction(DispatchPasteEvent::Yes) failed");
return rv;
}
nsresult EditorBase::PasteAsAction(int32_t aClipboardType,
DispatchPasteEvent aDispatchPasteEvent,
nsIPrincipal* aPrincipal /* = nullptr */) {
if (IsHTMLEditor() && IsReadonly()) {
return NS_OK;
}
AutoEditActionDataSetter editActionData(*this, EditAction::ePaste,
aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aDispatchPasteEvent == DispatchPasteEvent::Yes) {
RefPtr<nsFocusManager> focusManager = nsFocusManager::GetFocusManager();
if (NS_WARN_IF(!focusManager)) {
return NS_ERROR_UNEXPECTED;
}
const RefPtr<Element> focusedElement = focusManager->GetFocusedElement();
Result<ClipboardEventResult, nsresult> ret =
DispatchClipboardEventAndUpdateClipboard(ePaste, aClipboardType);
if (MOZ_UNLIKELY(ret.isErr())) {
NS_WARNING(
"EditorBase::DispatchClipboardEventAndUpdateClipboard(ePaste) "
"failed");
return EditorBase::ToGenericNSResult(ret.unwrapErr());
}
switch (ret.inspect()) {
case ClipboardEventResult::DoDefault:
break;
case ClipboardEventResult::DefaultPreventedOfPaste:
case ClipboardEventResult::IgnoredOrError:
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
case ClipboardEventResult::CopyOrCutHandled:
MOZ_ASSERT_UNREACHABLE("Invalid result for ePaste");
}
// If focus is changed by a "paste" event listener, we should keep handling
// the "pasting" in new focused editor because Chrome works as so.
const RefPtr<Element> newFocusedElement = focusManager->GetFocusedElement();
if (MOZ_UNLIKELY(focusedElement != newFocusedElement)) {
// For the privacy reason, let's top handling it if new focused element is
// in different document.
if (focusManager->GetFocusedWindow() != GetWindow()) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
RefPtr<EditorBase> editorBase =
nsContentUtils::GetActiveEditor(GetPresContext());
if (!editorBase || (editorBase->IsHTMLEditor() &&
!editorBase->AsHTMLEditor()->IsActiveInDOMWindow())) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
if (editorBase != this) {
nsresult rv = editorBase->PasteAsAction(
aClipboardType, DispatchPasteEvent::No, aPrincipal);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::PasteAsAction(DispatchPasteEvent::No) failed");
return EditorBase::ToGenericNSResult(rv);
}
}
} else {
// The caller must already have dispatched a "paste" event.
editActionData.NotifyOfDispatchingClipboardEvent();
}
nsresult rv = HandlePaste(editActionData, aClipboardType);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::HandlePaste() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::PasteAsQuotationAsAction(
int32_t aClipboardType, DispatchPasteEvent aDispatchPasteEvent,
nsIPrincipal* aPrincipal /* = nullptr */) {
MOZ_ASSERT(aClipboardType == nsIClipboard::kGlobalClipboard ||
aClipboardType == nsIClipboard::kSelectionClipboard);
if (IsHTMLEditor() && IsReadonly()) {
return NS_OK;
}
AutoEditActionDataSetter editActionData(*this, EditAction::ePasteAsQuotation,
aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aDispatchPasteEvent == DispatchPasteEvent::Yes) {
RefPtr<nsFocusManager> focusManager = nsFocusManager::GetFocusManager();
if (NS_WARN_IF(!focusManager)) {
return NS_ERROR_UNEXPECTED;
}
const RefPtr<Element> focusedElement = focusManager->GetFocusedElement();
Result<ClipboardEventResult, nsresult> ret =
DispatchClipboardEventAndUpdateClipboard(ePaste, aClipboardType);
if (MOZ_UNLIKELY(ret.isErr())) {
NS_WARNING(
"EditorBase::DispatchClipboardEventAndUpdateClipboard(ePaste) "
"failed");
return EditorBase::ToGenericNSResult(ret.unwrapErr());
}
switch (ret.inspect()) {
case ClipboardEventResult::DoDefault:
break;
case ClipboardEventResult::DefaultPreventedOfPaste:
case ClipboardEventResult::IgnoredOrError:
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
case ClipboardEventResult::CopyOrCutHandled:
MOZ_ASSERT_UNREACHABLE("Invalid result for ePaste");
}
// If focus is changed by a "paste" event listener, we should keep handling
// the "pasting" in new focused editor because Chrome works as so.
const RefPtr<Element> newFocusedElement = focusManager->GetFocusedElement();
if (MOZ_UNLIKELY(focusedElement != newFocusedElement)) {
// For the privacy reason, let's top handling it if new focused element is
// in different document.
if (focusManager->GetFocusedWindow() != GetWindow()) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
RefPtr<EditorBase> editorBase =
nsContentUtils::GetActiveEditor(GetPresContext());
if (!editorBase || (editorBase->IsHTMLEditor() &&
!editorBase->AsHTMLEditor()->IsActiveInDOMWindow())) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
if (editorBase != this) {
nsresult rv = editorBase->PasteAsQuotationAsAction(
aClipboardType, DispatchPasteEvent::No, aPrincipal);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::PasteAsQuotationAsAction("
"DispatchPasteEvent::No) failed");
return EditorBase::ToGenericNSResult(rv);
}
}
} else {
// The caller must already have dispatched a "paste" event.
editActionData.NotifyOfDispatchingClipboardEvent();
}
nsresult rv = HandlePasteAsQuotation(editActionData, aClipboardType);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::HandlePasteAsQuotation() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::PasteTransferableAsAction(
nsITransferable* aTransferable, DispatchPasteEvent aDispatchPasteEvent,
nsIPrincipal* aPrincipal /* = nullptr */) {
// FIXME: This may be called as a call of nsIEditor::PasteTransferable.
// In this case, we should keep handling the paste even in the readonly mode.
if (IsHTMLEditor() && IsReadonly()) {
return NS_OK;
}
AutoEditActionDataSetter editActionData(*this, EditAction::ePaste,
aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aDispatchPasteEvent == DispatchPasteEvent::Yes) {
RefPtr<nsFocusManager> focusManager = nsFocusManager::GetFocusManager();
if (NS_WARN_IF(!focusManager)) {
return NS_ERROR_UNEXPECTED;
}
const RefPtr<Element> focusedElement = focusManager->GetFocusedElement();
// Use an invalid value for the clipboard type as data comes from
// aTransferable and we don't currently implement a way to put that in the
// data transfer in TextEditor yet.
Result<ClipboardEventResult, nsresult> ret =
DispatchClipboardEventAndUpdateClipboard(
ePaste, IsTextEditor() ? -1 : nsIClipboard::kGlobalClipboard);
if (MOZ_UNLIKELY(ret.isErr())) {
NS_WARNING(
"EditorBase::DispatchClipboardEventAndUpdateClipboard(ePaste) "
"failed");
return EditorBase::ToGenericNSResult(ret.unwrapErr());
}
switch (ret.inspect()) {
case ClipboardEventResult::DoDefault:
break;
case ClipboardEventResult::DefaultPreventedOfPaste:
case ClipboardEventResult::IgnoredOrError:
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
case ClipboardEventResult::CopyOrCutHandled:
MOZ_ASSERT_UNREACHABLE("Invalid result for ePaste");
}
// If focus is changed by a "paste" event listener, we should keep handling
// the "pasting" in new focused editor because Chrome works as so.
const RefPtr<Element> newFocusedElement = focusManager->GetFocusedElement();
if (MOZ_UNLIKELY(focusedElement != newFocusedElement)) {
// For the privacy reason, let's top handling it if new focused element is
// in different document.
if (focusManager->GetFocusedWindow() != GetWindow()) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
RefPtr<EditorBase> editorBase =
nsContentUtils::GetActiveEditor(GetPresContext());
if (!editorBase || (editorBase->IsHTMLEditor() &&
!editorBase->AsHTMLEditor()->IsActiveInDOMWindow())) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
if (editorBase != this) {
nsresult rv = editorBase->PasteTransferableAsAction(
aTransferable, DispatchPasteEvent::No, aPrincipal);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::PasteTransferableAsAction("
"DispatchPasteEvent::No) failed");
return EditorBase::ToGenericNSResult(rv);
}
}
} else {
// The caller must already have dispatched a "paste" event.
editActionData.NotifyOfDispatchingClipboardEvent();
}
if (NS_WARN_IF(!aTransferable)) {
return NS_ERROR_INVALID_ARG;
}
nsresult rv = HandlePasteTransferable(editActionData, *aTransferable);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::HandlePasteTransferable() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::PrepareToInsertContent(
const EditorDOMPoint& aPointToInsert,
DeleteSelectedContent aDeleteSelectedContent) {
// TODO: Move this method to `EditorBase`.
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(aPointToInsert.IsSet());
EditorDOMPoint pointToInsert(aPointToInsert);
if (aDeleteSelectedContent == DeleteSelectedContent::Yes) {
AutoTrackDOMPoint tracker(RangeUpdaterRef(), &pointToInsert);
nsresult rv = DeleteSelectionAsSubAction(
nsIEditor::eNone,
IsTextEditor() ? nsIEditor::eNoStrip : nsIEditor::eStrip);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteSelectionAsSubAction(eNone) failed");
return rv;
}
}
nsresult rv = CollapseSelectionTo(pointToInsert);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed");
return rv;
}
nsresult EditorBase::InsertTextAt(
const nsAString& aStringToInsert, const EditorDOMPoint& aPointToInsert,
DeleteSelectedContent aDeleteSelectedContent) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(aPointToInsert.IsSet());
nsresult rv = PrepareToInsertContent(aPointToInsert, aDeleteSelectedContent);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::PrepareToInsertContent() failed");
return rv;
}
rv = InsertTextAsSubAction(aStringToInsert, SelectionHandling::Delete);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAsSubAction() failed");
return rv;
}
EditorBase::SafeToInsertData EditorBase::IsSafeToInsertData(
nsIPrincipal* aSourcePrincipal) const {
// Try to determine whether we should use a sanitizing fragment sink
RefPtr<Document> destdoc = GetDocument();
NS_ASSERTION(destdoc, "Where is our destination doc?");
nsIDocShell* docShell = nullptr;
if (RefPtr<BrowsingContext> bc = destdoc->GetBrowsingContext()) {
RefPtr<BrowsingContext> root = bc->Top();
MOZ_ASSERT(root, "root should not be null");
docShell = root->GetDocShell();
}
bool isSafe =
docShell && docShell->GetAppType() == nsIDocShell::APP_TYPE_EDITOR;
if (!isSafe && aSourcePrincipal) {
nsIPrincipal* destPrincipal = destdoc->NodePrincipal();
NS_ASSERTION(destPrincipal, "How come we don't have a principal?");
DebugOnly<nsresult> rvIgnored =
aSourcePrincipal->Subsumes(destPrincipal, &isSafe);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsIPrincipal::Subsumes() failed, but ignored");
}
return isSafe ? SafeToInsertData::Yes : SafeToInsertData::No;
}
NS_IMETHODIMP EditorBase::PasteTransferable(nsITransferable* aTransferable) {
nsresult rv =
PasteTransferableAsAction(aTransferable, DispatchPasteEvent::Yes);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::PasteTransferableAsAction(DispatchPasteEvent::Yes) failed");
return rv;
}
NS_IMETHODIMP EditorBase::CanPaste(int32_t aClipboardType, bool* aCanPaste) {
if (NS_WARN_IF(!aCanPaste)) {
return NS_ERROR_INVALID_ARG;
}
*aCanPaste = CanPaste(aClipboardType);
return NS_OK;
}
NS_IMETHODIMP EditorBase::SetAttribute(Element* aElement,
const nsAString& aAttribute,
const nsAString& aValue) {
if (NS_WARN_IF(aAttribute.IsEmpty()) || NS_WARN_IF(!aElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eSetAttribute);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
RefPtr<nsAtom> attribute = NS_Atomize(aAttribute);
rv = SetAttributeWithTransaction(*aElement, *attribute, aValue);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::SetAttributeWithTransaction() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::SetAttributeWithTransaction(Element& aElement,
nsAtom& aAttribute,
const nsAString& aValue) {
RefPtr<ChangeAttributeTransaction> transaction =
ChangeAttributeTransaction::Create(aElement, aAttribute, aValue);
nsresult rv = DoTransactionInternal(transaction);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DoTransactionInternal() failed");
return rv;
}
NS_IMETHODIMP EditorBase::RemoveAttribute(Element* aElement,
const nsAString& aAttribute) {
if (NS_WARN_IF(aAttribute.IsEmpty()) || NS_WARN_IF(!aElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eRemoveAttribute);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
RefPtr<nsAtom> attribute = NS_Atomize(aAttribute);
rv = RemoveAttributeWithTransaction(*aElement, *attribute);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::RemoveAttributeWithTransaction() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::RemoveAttributeWithTransaction(Element& aElement,
nsAtom& aAttribute) {
if (!aElement.HasAttr(&aAttribute)) {
return NS_OK;
}
RefPtr<ChangeAttributeTransaction> transaction =
ChangeAttributeTransaction::CreateToRemove(aElement, aAttribute);
nsresult rv = DoTransactionInternal(transaction);
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DoTransactionInternal() failed");
return rv;
}
nsresult EditorBase::MarkElementDirty(Element& aElement) const {
// Mark the node dirty, but not for webpages (bug 599983)
if (!OutputsMozDirty()) {
return NS_OK;
}
DebugOnly<nsresult> rvIgnored =
aElement.SetAttr(kNameSpaceID_None, nsGkAtoms::mozdirty, u""_ns, false);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"Element::SetAttr(nsGkAtoms::mozdirty) failed, but ignored");
return NS_WARN_IF(Destroyed()) ? NS_ERROR_EDITOR_DESTROYED : NS_OK;
}
NS_IMETHODIMP EditorBase::GetInlineSpellChecker(
bool aAutoCreate, nsIInlineSpellChecker** aInlineSpellChecker) {
if (NS_WARN_IF(!aInlineSpellChecker)) {
return NS_ERROR_INVALID_ARG;
}
if (mDidPreDestroy) {
// Don't allow people to get or create the spell checker once the editor
// is going away.
*aInlineSpellChecker = nullptr;
return aAutoCreate ? NS_ERROR_NOT_AVAILABLE : NS_OK;
}
// We don't want to show the spell checking UI if there are no spell check
// dictionaries available.
if (!mozInlineSpellChecker::CanEnableInlineSpellChecking()) {
*aInlineSpellChecker = nullptr;
return NS_ERROR_FAILURE;
}
if (!mInlineSpellChecker && aAutoCreate) {
mInlineSpellChecker = new mozInlineSpellChecker();
}
if (mInlineSpellChecker) {
nsresult rv = mInlineSpellChecker->Init(this);
if (NS_FAILED(rv)) {
NS_WARNING("mozInlineSpellChecker::Init() failed");
mInlineSpellChecker = nullptr;
return rv;
}
}
*aInlineSpellChecker = do_AddRef(mInlineSpellChecker).take();
return NS_OK;
}
void EditorBase::SyncRealTimeSpell() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return;
}
bool enable = GetDesiredSpellCheckState();
// Initializes mInlineSpellChecker
nsCOMPtr<nsIInlineSpellChecker> spellChecker;
DebugOnly<nsresult> rvIgnored =
GetInlineSpellChecker(enable, getter_AddRefs(spellChecker));
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::GetInlineSpellChecker() failed, but ignored");
if (mInlineSpellChecker) {
if (!mSpellCheckerDictionaryUpdated && enable) {
DebugOnly<nsresult> rvIgnored =
mInlineSpellChecker->UpdateCurrentDictionary();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"mozInlineSpellChecker::UpdateCurrentDictionary() "
"failed, but ignored");
mSpellCheckerDictionaryUpdated = true;
}
// We might have a mInlineSpellChecker even if there are no dictionaries
// available since we don't destroy the mInlineSpellChecker when the last
// dictionariy is removed, but in that case spellChecker is null
DebugOnly<nsresult> rvIgnored =
mInlineSpellChecker->SetEnableRealTimeSpell(enable && spellChecker);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"mozInlineSpellChecker::SetEnableRealTimeSpell() failed, but ignored");
}
}
NS_IMETHODIMP EditorBase::SetSpellcheckUserOverride(bool enable) {
mSpellcheckCheckboxState = enable ? eTriTrue : eTriFalse;
SyncRealTimeSpell();
return NS_OK;
}
NS_IMETHODIMP EditorBase::InsertNode(nsINode* aNodeToInsert,
nsINode* aContainer, uint32_t aOffset) {
nsCOMPtr<nsIContent> contentToInsert = do_QueryInterface(aNodeToInsert);
if (NS_WARN_IF(!contentToInsert) || NS_WARN_IF(!aContainer)) {
return NS_ERROR_NULL_POINTER;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eInsertNode);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
const uint32_t offset = std::min(aOffset, aContainer->Length());
Result<CreateContentResult, nsresult> insertContentResult =
InsertNodeWithTransaction(*contentToInsert,
EditorDOMPoint(aContainer, offset));
if (MOZ_UNLIKELY(insertContentResult.isErr())) {
NS_WARNING("EditorBase::InsertNodeWithTransaction() failed");
return EditorBase::ToGenericNSResult(insertContentResult.unwrapErr());
}
rv = insertContentResult.inspect().SuggestCaretPointTo(
*this, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CreateContentResult::SuggestCaretPointTo() failed");
return EditorBase::ToGenericNSResult(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CreateContentResult::SuggestCaretPointTo() failed, but ignored");
return NS_OK;
}
template <typename ContentNodeType>
Result<CreateNodeResultBase<ContentNodeType>, nsresult>
EditorBase::InsertNodeWithTransaction(ContentNodeType& aContentToInsert,
const EditorDOMPoint& aPointToInsert) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT_IF(IsTextEditor(), !aContentToInsert.IsText());
if (NS_WARN_IF(!aPointToInsert.IsSet())) {
return Err(NS_ERROR_INVALID_ARG);
}
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eInsertNode, nsIEditor::eNext, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return Err(ignoredError.StealNSResult());
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"TextEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
RefPtr<InsertNodeTransaction> transaction =
InsertNodeTransaction::Create(*this, aContentToInsert, aPointToInsert);
nsresult rv = DoTransactionInternal(transaction);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DoTransactionInternal() failed");
DebugOnly<nsresult> rvIgnored =
RangeUpdaterRef().SelAdjInsertNode(aPointToInsert);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"RangeUpdater::SelAdjInsertNode() failed, but ignored");
if (NS_WARN_IF(Destroyed())) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (NS_WARN_IF(aContentToInsert.GetParentNode() !=
aPointToInsert.GetContainer())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
if (NS_FAILED(rv)) {
return Err(rv);
}
if (IsHTMLEditor()) {
TopLevelEditSubActionDataRef().DidInsertContent(*this, aContentToInsert);
}
return CreateNodeResultBase<ContentNodeType>(
&aContentToInsert, transaction->SuggestPointToPutCaret<EditorDOMPoint>());
}
Result<CreateElementResult, nsresult>
EditorBase::InsertPaddingBRElementForEmptyLastLineWithTransaction(
const EditorDOMPoint& aPointToInsert) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(IsHTMLEditor() || !aPointToInsert.IsInTextNode());
if (MOZ_UNLIKELY(!aPointToInsert.IsSet())) {
return Err(NS_ERROR_FAILURE);
}
EditorDOMPoint pointToInsert;
if (IsTextEditor()) {
pointToInsert = aPointToInsert;
} else {
Result<EditorDOMPoint, nsresult> maybePointToInsert =
MOZ_KnownLive(AsHTMLEditor())->PrepareToInsertBRElement(aPointToInsert);
if (maybePointToInsert.isErr()) {
return maybePointToInsert.propagateErr();
}
MOZ_ASSERT(maybePointToInsert.inspect().IsSetAndValid());
pointToInsert = maybePointToInsert.unwrap();
}
RefPtr<Element> newBRElement = CreateHTMLContent(nsGkAtoms::br);
if (NS_WARN_IF(!newBRElement)) {
return Err(NS_ERROR_FAILURE);
}
newBRElement->SetFlags(NS_PADDING_FOR_EMPTY_LAST_LINE);
Result<CreateElementResult, nsresult> insertBRElementResult =
InsertNodeWithTransaction<Element>(*newBRElement, pointToInsert);
NS_WARNING_ASSERTION(insertBRElementResult.isOk(),
"EditorBase::InsertNodeWithTransaction() failed");
return insertBRElementResult;
}
NS_IMETHODIMP EditorBase::DeleteNode(nsINode* aNode) {
if (NS_WARN_IF(!aNode) || NS_WARN_IF(!aNode->IsContent())) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eRemoveNode);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
rv = DeleteNodeWithTransaction(MOZ_KnownLive(*aNode->AsContent()));
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DeleteNodeWithTransaction() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::DeleteNodeWithTransaction(nsIContent& aContent) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT_IF(IsTextEditor(), !aContent.IsText());
// Do nothing if the node is read-only.
if (IsHTMLEditor() && NS_WARN_IF(!HTMLEditUtils::IsRemovableNode(aContent))) {
return NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE;
}
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eDeleteNode, nsIEditor::ePrevious, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"TextEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
if (IsHTMLEditor()) {
TopLevelEditSubActionDataRef().WillDeleteContent(*this, aContent);
}
// FYI: DeleteNodeTransaction grabs aContent while it's alive. So, it's safe
// to refer aContent even after calling DoTransaction().
RefPtr<DeleteNodeTransaction> deleteNodeTransaction =
DeleteNodeTransaction::MaybeCreate(*this, aContent);
NS_WARNING_ASSERTION(deleteNodeTransaction,
"DeleteNodeTransaction::MaybeCreate() failed");
nsresult rv;
if (deleteNodeTransaction) {
rv = DoTransactionInternal(deleteNodeTransaction);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DoTransactionInternal() failed");
if (mTextServicesDocument && NS_SUCCEEDED(rv)) {
RefPtr<TextServicesDocument> textServicesDocument = mTextServicesDocument;
textServicesDocument->DidDeleteContent(aContent);
}
} else {
rv = NS_ERROR_FAILURE;
}
if (!mActionListeners.IsEmpty()) {
for (auto& listener : mActionListeners.Clone()) {
DebugOnly<nsresult> rvIgnored = listener->DidDeleteNode(&aContent, rv);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIEditActionListener::DidDeleteNode() failed, but ignored");
}
}
return NS_WARN_IF(Destroyed()) ? NS_ERROR_EDITOR_DESTROYED : rv;
}
NS_IMETHODIMP EditorBase::NotifySelectionChanged(Document* aDocument,
Selection* aSelection,
int16_t aReason,
int32_t aAmount) {
if (NS_WARN_IF(!aDocument) || NS_WARN_IF(!aSelection)) {
return NS_ERROR_INVALID_ARG;
}
if (mTextInputListener) {
RefPtr<TextInputListener> textInputListener = mTextInputListener;
textInputListener->OnSelectionChange(*aSelection, aReason);
}
if (mIMEContentObserver) {
RefPtr<IMEContentObserver> observer = mIMEContentObserver;
observer->OnSelectionChange(*aSelection);
}
return NS_OK;
}
void EditorBase::NotifyEditorObservers(
NotificationForEditorObservers aNotification) {
MOZ_ASSERT(IsEditActionDataAvailable());
switch (aNotification) {
case eNotifyEditorObserversOfEnd:
mIsInEditSubAction = false;
if (mEditActionData) {
mEditActionData->MarkAsHandled();
}
if (mTextInputListener) {
// TODO: TextInputListener::OnEditActionHandled() may return
// NS_ERROR_OUT_OF_MEMORY. If so and if
// TextControlState::SetValue() setting value with us, we should
// return the result to EditorBase::ReplaceTextAsAction(),
// EditorBase::DeleteSelectionAsAction() and
// TextEditor::InsertTextAsAction(). However, it requires a lot
// of changes in editor classes, but it's not so important since
// editor does not use fallible allocation. Therefore, normally,
// the process must be crashed anyway.
RefPtr<TextInputListener> listener = mTextInputListener;
nsresult rv =
listener->OnEditActionHandled(MOZ_KnownLive(*AsTextEditor()));
MOZ_RELEASE_ASSERT(rv != NS_ERROR_OUT_OF_MEMORY,
"Setting value failed due to out of memory");
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"TextInputListener::OnEditActionHandled() failed, but ignored");
}
if (mIMEContentObserver) {
RefPtr<IMEContentObserver> observer = mIMEContentObserver;
observer->OnEditActionHandled();
}
if (!mDispatchInputEvent || IsEditActionAborted() ||
IsEditActionCanceled()) {
break;
}
DispatchInputEvent();
break;
case eNotifyEditorObserversOfBefore:
if (NS_WARN_IF(mIsInEditSubAction)) {
return;
}
mIsInEditSubAction = true;
if (mIMEContentObserver) {
RefPtr<IMEContentObserver> observer = mIMEContentObserver;
observer->BeforeEditAction();
}
return;
case eNotifyEditorObserversOfCancel:
mIsInEditSubAction = false;
if (mEditActionData) {
mEditActionData->MarkAsHandled();
}
if (mIMEContentObserver) {
RefPtr<IMEContentObserver> observer = mIMEContentObserver;
observer->CancelEditAction();
}
break;
default:
MOZ_CRASH("Handle all notifications here");
break;
}
if (IsHTMLEditor() && !Destroyed()) {
// We may need to show resizing handles or update existing ones after
// all transactions are done. This way of doing is preferred to DOM
// mutation events listeners because all the changes the user can apply
// to a document may result in multiple events, some of them quite hard
// to listen too (in particular when an ancestor of the selection is
// changed but the selection itself is not changed).
DebugOnly<nsresult> rvIgnored =
MOZ_KnownLive(AsHTMLEditor())->RefreshEditingUI();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"HTMLEditor::RefreshEditingUI() failed, but ignored");
}
}
void EditorBase::DispatchInputEvent() {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!IsEditActionCanceled(),
"If preceding beforeinput event is canceled, we shouldn't "
"dispatch input event");
MOZ_ASSERT(
!ShouldAlreadyHaveHandledBeforeInputEventDispatching(),
"We've not handled beforeinput event but trying to dispatch input event");
// We don't need to dispatch multiple input events if there is a pending
// input event. However, it may have different event target. If we resolved
// this issue, we need to manage the pending events in an array. But it's
// overwork. We don't need to do it for the very rare case.
// TODO: However, we start to set InputEvent.inputType. So, each "input"
// event now notifies web app each change. So, perhaps, we should
// not omit input events.
RefPtr<Element> targetElement = GetInputEventTargetElement();
if (NS_WARN_IF(!targetElement)) {
return;
}
RefPtr<DataTransfer> dataTransfer = GetInputEventDataTransfer();
DebugOnly<nsresult> rvIgnored = nsContentUtils::DispatchInputEvent(
targetElement, eEditorInput, ToInputType(GetEditAction()), this,
dataTransfer ? InputEventOptions(dataTransfer,
InputEventOptions::NeverCancelable::No)
: InputEventOptions(GetInputEventData(),
InputEventOptions::NeverCancelable::No));
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsContentUtils::DispatchInputEvent() failed, but ignored");
}
NS_IMETHODIMP EditorBase::AddEditActionListener(
nsIEditActionListener* aListener) {
if (NS_WARN_IF(!aListener)) {
return NS_ERROR_INVALID_ARG;
}
// If given edit action listener is text services document for the inline
// spell checker, store it as reference of concrete class for performance
// reason.
if (mInlineSpellChecker) {
EditorSpellCheck* editorSpellCheck =
mInlineSpellChecker->GetEditorSpellCheck();
if (editorSpellCheck) {
mozSpellChecker* spellChecker = editorSpellCheck->GetSpellChecker();
if (spellChecker) {
TextServicesDocument* textServicesDocument =
spellChecker->GetTextServicesDocument();
if (static_cast<nsIEditActionListener*>(textServicesDocument) ==
aListener) {
mTextServicesDocument = textServicesDocument;
return NS_OK;
}
}
}
}
// Make sure the listener isn't already on the list
if (!mActionListeners.Contains(aListener)) {
mActionListeners.AppendElement(*aListener);
NS_WARNING_ASSERTION(
mActionListeners.Length() != 1,
"nsIEditActionListener installed, this editor becomes slower");
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::RemoveEditActionListener(
nsIEditActionListener* aListener) {
if (NS_WARN_IF(!aListener)) {
return NS_ERROR_INVALID_ARG;
}
if (static_cast<nsIEditActionListener*>(mTextServicesDocument) == aListener) {
mTextServicesDocument = nullptr;
return NS_OK;
}
NS_WARNING_ASSERTION(mActionListeners.Length() != 1,
"All nsIEditActionListeners have been removed, this "
"editor becomes faster");
mActionListeners.RemoveElement(aListener);
return NS_OK;
}
NS_IMETHODIMP EditorBase::AddDocumentStateListener(
nsIDocumentStateListener* aListener) {
if (NS_WARN_IF(!aListener)) {
return NS_ERROR_INVALID_ARG;
}
if (!mDocStateListeners.Contains(aListener)) {
mDocStateListeners.AppendElement(*aListener);
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::RemoveDocumentStateListener(
nsIDocumentStateListener* aListener) {
if (NS_WARN_IF(!aListener)) {
return NS_ERROR_INVALID_ARG;
}
mDocStateListeners.RemoveElement(aListener);
return NS_OK;
}
NS_IMETHODIMP EditorBase::ForceCompositionEnd() {
nsresult rv = CommitComposition();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CommitComposition() failed");
return rv;
}
nsresult EditorBase::CommitComposition() {
nsPresContext* presContext = GetPresContext();
if (NS_WARN_IF(!presContext)) {
return NS_ERROR_NOT_AVAILABLE;
}
if (!mComposition) {
return NS_OK;
}
nsresult rv =
IMEStateManager::NotifyIME(REQUEST_TO_COMMIT_COMPOSITION, presContext);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "IMEStateManager::NotifyIME() failed");
return rv;
}
nsresult EditorBase::GetPreferredIMEState(IMEState* aState) {
if (NS_WARN_IF(!aState)) {
return NS_ERROR_INVALID_ARG;
}
aState->mEnabled = IMEEnabled::Enabled;
aState->mOpen = IMEState::DONT_CHANGE_OPEN_STATE;
if (IsReadonly()) {
aState->mEnabled = IMEEnabled::Disabled;
return NS_OK;
}
Element* rootElement = GetRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_FAILURE;
}
nsIFrame* frameForRootElement = rootElement->GetPrimaryFrame();
if (NS_WARN_IF(!frameForRootElement)) {
return NS_ERROR_FAILURE;
}
switch (frameForRootElement->StyleUIReset()->mIMEMode) {
case StyleImeMode::Auto:
if (IsPasswordEditor()) {
aState->mEnabled = IMEEnabled::Password;
}
break;
case StyleImeMode::Disabled:
// we should use password state for |ime-mode: disabled;|.
aState->mEnabled = IMEEnabled::Password;
break;
case StyleImeMode::Active:
aState->mOpen = IMEState::OPEN;
break;
case StyleImeMode::Inactive:
aState->mOpen = IMEState::CLOSED;
break;
case StyleImeMode::Normal:
break;
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetComposing(bool* aResult) {
if (NS_WARN_IF(!aResult)) {
return NS_ERROR_INVALID_ARG;
}
*aResult = IsIMEComposing();
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetRootElement(Element** aRootElement) {
if (NS_WARN_IF(!aRootElement)) {
return NS_ERROR_INVALID_ARG;
}
*aRootElement = do_AddRef(mRootElement).take();
return NS_WARN_IF(!*aRootElement) ? NS_ERROR_NOT_AVAILABLE : NS_OK;
}
void EditorBase::OnStartToHandleTopLevelEditSubAction(
EditSubAction aTopLevelEditSubAction,
nsIEditor::EDirection aDirectionOfTopLevelEditSubAction, ErrorResult& aRv) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!aRv.Failed());
mEditActionData->SetTopLevelEditSubAction(aTopLevelEditSubAction,
aDirectionOfTopLevelEditSubAction);
}
nsresult EditorBase::OnEndHandlingTopLevelEditSubAction() {
MOZ_ASSERT(IsEditActionDataAvailable());
mEditActionData->SetTopLevelEditSubAction(EditSubAction::eNone, eNone);
return NS_OK;
}
void EditorBase::DoInsertText(Text& aText, uint32_t aOffset,
const nsAString& aStringToInsert,
ErrorResult& aRv) {
aText.InsertData(aOffset, aStringToInsert, aRv);
if (NS_WARN_IF(Destroyed())) {
aRv = NS_ERROR_EDITOR_DESTROYED;
return;
}
if (aRv.Failed()) {
NS_WARNING("Text::InsertData() failed");
return;
}
if (IsTextEditor() && !aStringToInsert.IsEmpty()) {
aRv = MOZ_KnownLive(AsTextEditor())
->DidInsertText(aText.TextLength(), aOffset,
aStringToInsert.Length());
NS_WARNING_ASSERTION(!aRv.Failed(), "TextEditor::DidInsertText() failed");
}
}
void EditorBase::DoDeleteText(Text& aText, uint32_t aOffset, uint32_t aCount,
ErrorResult& aRv) {
if (IsTextEditor() && aCount > 0) {
AsTextEditor()->WillDeleteText(aText.TextLength(), aOffset, aCount);
}
aText.DeleteData(aOffset, aCount, aRv);
if (NS_WARN_IF(Destroyed())) {
aRv = NS_ERROR_EDITOR_DESTROYED;
return;
}
NS_WARNING_ASSERTION(!aRv.Failed(), "Text::DeleteData() failed");
}
void EditorBase::DoReplaceText(Text& aText, uint32_t aOffset, uint32_t aCount,
const nsAString& aStringToInsert,
ErrorResult& aRv) {
if (IsTextEditor() && aCount > 0) {
AsTextEditor()->WillDeleteText(aText.TextLength(), aOffset, aCount);
}
aText.ReplaceData(aOffset, aCount, aStringToInsert, aRv);
if (NS_WARN_IF(Destroyed())) {
aRv = NS_ERROR_EDITOR_DESTROYED;
return;
}
if (aRv.Failed()) {
NS_WARNING("Text::ReplaceData() failed");
return;
}
if (IsTextEditor() && !aStringToInsert.IsEmpty()) {
aRv = MOZ_KnownLive(AsTextEditor())
->DidInsertText(aText.TextLength(), aOffset,
aStringToInsert.Length());
NS_WARNING_ASSERTION(!aRv.Failed(), "TextEditor::DidInsertText() failed");
}
}
void EditorBase::DoSetText(Text& aText, const nsAString& aStringToSet,
ErrorResult& aRv) {
if (IsTextEditor()) {
uint32_t length = aText.TextLength();
if (length > 0) {
AsTextEditor()->WillDeleteText(length, 0, length);
}
}
aText.SetData(aStringToSet, aRv);
if (NS_WARN_IF(Destroyed())) {
aRv = NS_ERROR_EDITOR_DESTROYED;
return;
}
if (aRv.Failed()) {
NS_WARNING("Text::SetData() failed");
return;
}
if (IsTextEditor() && !aStringToSet.IsEmpty()) {
aRv = MOZ_KnownLive(AsTextEditor())
->DidInsertText(aText.Length(), 0, aStringToSet.Length());
NS_WARNING_ASSERTION(!aRv.Failed(), "TextEditor::DidInsertText() failed");
}
}
nsresult EditorBase::CloneAttributeWithTransaction(nsAtom& aAttribute,
Element& aDestElement,
Element& aSourceElement) {
nsAutoString attrValue;
if (aSourceElement.GetAttr(kNameSpaceID_None, &aAttribute, attrValue)) {
nsresult rv =
SetAttributeWithTransaction(aDestElement, aAttribute, attrValue);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::SetAttributeWithTransaction() failed");
return rv;
}
nsresult rv = RemoveAttributeWithTransaction(aDestElement, aAttribute);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::RemoveAttributeWithTransaction() failed");
return rv;
}
NS_IMETHODIMP EditorBase::CloneAttributes(Element* aDestElement,
Element* aSourceElement) {
if (NS_WARN_IF(!aDestElement) || NS_WARN_IF(!aSourceElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eSetAttribute);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
CloneAttributesWithTransaction(*aDestElement, *aSourceElement);
return NS_OK;
}
void EditorBase::CloneAttributesWithTransaction(Element& aDestElement,
Element& aSourceElement) {
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
// Use transaction system for undo only if destination is already in the
// document
Element* rootElement = GetRoot();
if (NS_WARN_IF(!rootElement)) {
return;
}
OwningNonNull<Element> destElement(aDestElement);
OwningNonNull<Element> sourceElement(aSourceElement);
bool isDestElementInBody = rootElement->Contains(destElement);
// Clear existing attributes
RefPtr<nsDOMAttributeMap> destAttributes = destElement->Attributes();
while (RefPtr<Attr> attr = destAttributes->Item(0)) {
if (isDestElementInBody) {
DebugOnly<nsresult> rvIgnored = RemoveAttributeWithTransaction(
destElement, MOZ_KnownLive(*attr->NodeInfo()->NameAtom()));
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::RemoveAttributeWithTransaction() failed, but ignored");
} else {
DebugOnly<nsresult> rvIgnored = destElement->UnsetAttr(
kNameSpaceID_None, attr->NodeInfo()->NameAtom(), true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"Element::UnsetAttr() failed, but ignored");
}
}
// Set just the attributes that the source element has
RefPtr<nsDOMAttributeMap> sourceAttributes = sourceElement->Attributes();
uint32_t sourceCount = sourceAttributes->Length();
for (uint32_t i = 0; i < sourceCount; i++) {
RefPtr<Attr> attr = sourceAttributes->Item(i);
nsAutoString value;
attr->GetValue(value);
if (isDestElementInBody) {
DebugOnly<nsresult> rvIgnored = SetAttributeOrEquivalent(
destElement, MOZ_KnownLive(attr->NodeInfo()->NameAtom()), value,
false);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::SetAttributeOrEquivalent() failed, but ignored");
} else {
// The element is not inserted in the document yet, we don't want to put
// a transaction on the UndoStack
DebugOnly<nsresult> rvIgnored = SetAttributeOrEquivalent(
destElement, MOZ_KnownLive(attr->NodeInfo()->NameAtom()), value,
true);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::SetAttributeOrEquivalent() failed, but ignored");
}
}
}
nsresult EditorBase::ScrollSelectionFocusIntoView() const {
nsISelectionController* selectionController = GetSelectionController();
if (!selectionController) {
return NS_OK;
}
DebugOnly<nsresult> rvIgnored = selectionController->ScrollSelectionIntoView(
nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_FOCUS_REGION,
nsISelectionController::SCROLL_OVERFLOW_HIDDEN);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsISelectionController::ScrollSelectionIntoView() failed, but ignored");
return NS_WARN_IF(Destroyed()) ? NS_ERROR_EDITOR_DESTROYED : NS_OK;
}
template <typename EditorDOMPointType>
EditorDOMPointType EditorBase::FindBetterInsertionPoint(
const EditorDOMPointType& aPoint) const {
if (MOZ_UNLIKELY(NS_WARN_IF(!aPoint.IsInContentNode()))) {
return aPoint;
}
MOZ_ASSERT(aPoint.IsSetAndValid());
if (aPoint.IsInTextNode()) {
// There is no "better" insertion point.
return aPoint;
}
if (!IsInPlaintextMode()) {
// We cannot find "better" insertion point in HTML editor.
// WARNING: When you add some code to find better node in HTML editor,
// you need to call this before calling InsertTextWithTransaction()
// in HTMLEditor.
return aPoint;
}
RefPtr<Element> rootElement = GetRoot();
if (aPoint.GetContainer() == rootElement) {
// In some cases, aNode is the anonymous DIV, and offset is 0. To avoid
// injecting unneeded text nodes, we first look to see if we have one
// available. In that case, we'll just adjust node and offset accordingly.
if (aPoint.IsStartOfContainer() && aPoint.GetContainer()->HasChildren() &&
aPoint.GetContainer()->GetFirstChild()->IsText()) {
return EditorDOMPointType(aPoint.GetContainer()->GetFirstChild(), 0u);
}
// In some other cases, aNode is the anonymous DIV, and offset points to
// the terminating padding <br> element for empty last line. In that case,
// we'll adjust aInOutNode and aInOutOffset to the preceding text node,
// if any.
if (!aPoint.IsStartOfContainer()) {
if (IsHTMLEditor()) {
// Fall back to a slow path that uses GetChildAt_Deprecated() for
// Thunderbird's plaintext editor.
nsIContent* child = aPoint.GetPreviousSiblingOfChild();
if (child && child->IsText()) {
return EditorDOMPointType::AtEndOf(*child);
}
} else {
// If we're in a real plaintext editor, use a fast path that avoids
// calling GetChildAt_Deprecated() which may perform a linear search.
nsIContent* child = aPoint.GetContainer()->GetLastChild();
while (child) {
if (child->IsText()) {
return EditorDOMPointType::AtEndOf(*child);
}
child = child->GetPreviousSibling();
}
}
}
}
// Sometimes, aNode is the padding <br> element itself. In that case, we'll
// adjust the insertion point to the previous text node, if one exists, or
// to the parent anonymous DIV.
if (EditorUtils::IsPaddingBRElementForEmptyLastLine(
*aPoint.template ContainerAs<nsIContent>()) &&
aPoint.IsStartOfContainer()) {
nsIContent* previousSibling = aPoint.GetContainer()->GetPreviousSibling();
if (previousSibling && previousSibling->IsText()) {
return EditorDOMPointType::AtEndOf(*previousSibling);
}
nsINode* parentOfContainer = aPoint.GetContainerParent();
if (parentOfContainer && parentOfContainer == rootElement) {
return EditorDOMPointType(parentOfContainer,
aPoint.template ContainerAs<nsIContent>(), 0u);
}
}
return aPoint;
}
Result<InsertTextResult, nsresult> EditorBase::InsertTextWithTransaction(
Document& aDocument, const nsAString& aStringToInsert,
const EditorDOMPoint& aPointToInsert) {
if (NS_WARN_IF(!aPointToInsert.IsSet())) {
return Err(NS_ERROR_INVALID_ARG);
}
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
if (!ShouldHandleIMEComposition() && aStringToInsert.IsEmpty()) {
return InsertTextResult();
}
// In some cases, the node may be the anonymous div element or a padding
// <br> element for empty last line. Let's try to look for better insertion
// point in the nearest text node if there is.
EditorDOMPoint pointToInsert = FindBetterInsertionPoint(aPointToInsert);
// If a neighboring text node already exists, use that
if (!pointToInsert.IsInTextNode()) {
nsIContent* child = nullptr;
if (!pointToInsert.IsStartOfContainer() &&
(child = pointToInsert.GetPreviousSiblingOfChild()) &&
child->IsText()) {
pointToInsert.Set(child, child->Length());
} else if (!pointToInsert.IsEndOfContainer() &&
(child = pointToInsert.GetChild()) && child->IsText()) {
pointToInsert.Set(child, 0);
}
}
if (ShouldHandleIMEComposition()) {
if (!pointToInsert.IsInTextNode()) {
// create a text node
RefPtr<nsTextNode> newTextNode = CreateTextNode(u""_ns);
if (NS_WARN_IF(!newTextNode)) {
return Err(NS_ERROR_FAILURE);
}
// then we insert it into the dom tree
Result<CreateTextResult, nsresult> insertTextNodeResult =
InsertNodeWithTransaction<Text>(*newTextNode, pointToInsert);
if (MOZ_UNLIKELY(insertTextNodeResult.isErr())) {
NS_WARNING("EditorBase::InsertNodeWithTransaction() failed");
return insertTextNodeResult.propagateErr();
}
insertTextNodeResult.unwrap().IgnoreCaretPointSuggestion();
pointToInsert.Set(newTextNode, 0u);
}
Result<InsertTextResult, nsresult> insertTextResult =
InsertTextIntoTextNodeWithTransaction(aStringToInsert,
pointToInsert.AsInText());
NS_WARNING_ASSERTION(
insertTextResult.isOk(),
"EditorBase::InsertTextIntoTextNodeWithTransaction() failed");
return insertTextResult;
}
if (pointToInsert.IsInTextNode()) {
// we are inserting text into an existing text node.
Result<InsertTextResult, nsresult> insertTextResult =
InsertTextIntoTextNodeWithTransaction(aStringToInsert,
pointToInsert.AsInText());
NS_WARNING_ASSERTION(
insertTextResult.isOk(),
"EditorBase::InsertTextIntoTextNodeWithTransaction() failed");
return insertTextResult;
}
// we are inserting text into a non-text node. first we have to create a
// textnode (this also populates it with the text)
RefPtr<nsTextNode> newTextNode = CreateTextNode(aStringToInsert);
if (NS_WARN_IF(!newTextNode)) {
return Err(NS_ERROR_FAILURE);
}
// then we insert it into the dom tree
Result<CreateTextResult, nsresult> insertTextNodeResult =
InsertNodeWithTransaction<Text>(*newTextNode, pointToInsert);
if (MOZ_UNLIKELY(insertTextNodeResult.isErr())) {
NS_WARNING("EditorBase::InsertNodeWithTransaction() failed");
return Err(insertTextNodeResult.unwrapErr());
}
insertTextNodeResult.unwrap().IgnoreCaretPointSuggestion();
if (NS_WARN_IF(!newTextNode->IsInComposedDoc())) {
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
return InsertTextResult(EditorDOMPointInText::AtEndOf(*newTextNode),
EditorDOMPoint::AtEndOf(*newTextNode));
}
static bool TextFragmentBeginsWithStringAtOffset(
const nsTextFragment& aTextFragment, const uint32_t aOffset,
const nsAString& aString) {
const uint32_t stringLength = aString.Length();
if (aOffset + stringLength > aTextFragment.GetLength()) {
return false;
}
if (aTextFragment.Is2b()) {
return aString.Equals(aTextFragment.Get2b() + aOffset);
}
return aString.EqualsLatin1(aTextFragment.Get1b() + aOffset, stringLength);
}
static std::tuple<EditorDOMPointInText, EditorDOMPointInText>
AdjustTextInsertionRange(const EditorDOMPointInText& aInsertedPoint,
const nsAString& aInsertedString) {
if (TextFragmentBeginsWithStringAtOffset(
aInsertedPoint.ContainerAs<Text>()->TextFragment(),
aInsertedPoint.Offset(), aInsertedString)) {
return {aInsertedPoint,
EditorDOMPointInText(
aInsertedPoint.ContainerAs<Text>(),
aInsertedPoint.Offset() + aInsertedString.Length())};
}
return {EditorDOMPointInText(aInsertedPoint.ContainerAs<Text>(), 0),
EditorDOMPointInText::AtEndOf(*aInsertedPoint.ContainerAs<Text>())};
}
std::tuple<EditorDOMPointInText, EditorDOMPointInText>
EditorBase::ComputeInsertedRange(const EditorDOMPointInText& aInsertedPoint,
const nsAString& aInsertedString) const {
MOZ_ASSERT(aInsertedPoint.IsSet());
// The DOM was potentially modified during the transaction. This is possible
// through mutation event listeners. That is, the node could've been removed
// from the doc or otherwise modified.
if (!MayHaveMutationEventListeners(
NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED)) {
EditorDOMPointInText endOfInsertion(
aInsertedPoint.ContainerAs<Text>(),
aInsertedPoint.Offset() + aInsertedString.Length());
return {aInsertedPoint, endOfInsertion};
}
if (aInsertedPoint.ContainerAs<Text>()->IsInComposedDoc()) {
EditorDOMPointInText begin, end;
return AdjustTextInsertionRange(aInsertedPoint, aInsertedString);
}
return {EditorDOMPointInText(), EditorDOMPointInText()};
}
Result<InsertTextResult, nsresult>
EditorBase::InsertTextIntoTextNodeWithTransaction(
const nsAString& aStringToInsert,
const EditorDOMPointInText& aPointToInsert) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
RefPtr<EditTransactionBase> transaction;
bool isIMETransaction = false;
if (ShouldHandleIMEComposition()) {
transaction =
CompositionTransaction::Create(*this, aStringToInsert, aPointToInsert);
isIMETransaction = true;
} else {
transaction =
InsertTextTransaction::Create(*this, aStringToInsert, aPointToInsert);
}
// XXX We may not need these view batches anymore. This is handled at a
// higher level now I believe.
BeginUpdateViewBatch(__FUNCTION__);
nsresult rv = DoTransactionInternal(transaction);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DoTransactionInternal() failed");
EndUpdateViewBatch(__FUNCTION__);
// Don't check whether we've been destroyed here because we need to notify
// listeners and observers below even if we've already destroyed.
auto pointToInsert = [&]() -> EditorDOMPointInText {
if (!isIMETransaction) {
return aPointToInsert;
}
if (NS_WARN_IF(!mComposition->GetContainerTextNode())) {
return aPointToInsert;
}
return EditorDOMPointInText(
mComposition->GetContainerTextNode(),
std::min(mComposition->XPOffsetInTextNode(),
mComposition->GetContainerTextNode()->TextDataLength()));
}();
EditorDOMPointInText endOfInsertedText(
pointToInsert.ContainerAs<Text>(),
pointToInsert.Offset() + aStringToInsert.Length());
if (IsHTMLEditor()) {
auto [begin, end] = ComputeInsertedRange(pointToInsert, aStringToInsert);
if (begin.IsSet() && end.IsSet()) {
TopLevelEditSubActionDataRef().DidInsertText(
*this, begin.To<EditorRawDOMPoint>(), end.To<EditorRawDOMPoint>());
}
if (isIMETransaction) {
// Let's mark the text node as "modified frequently" if it interact with
// IME since non-ASCII character may be inserted into it in most cases.
pointToInsert.ContainerAs<Text>()->MarkAsMaybeModifiedFrequently();
}
// XXX Should we update endOfInsertedText here?
}
// let listeners know what happened
if (!mActionListeners.IsEmpty()) {
for (auto& listener : mActionListeners.Clone()) {
// TODO: might need adaptation because of mutation event listeners called
// during `DoTransactionInternal`.
DebugOnly<nsresult> rvIgnored = listener->DidInsertText(
pointToInsert.ContainerAs<Text>(),
static_cast<int32_t>(pointToInsert.Offset()), aStringToInsert, rv);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIEditActionListener::DidInsertText() failed, but ignored");
}
}
// Added some cruft here for bug 43366. Layout was crashing because we left
// an empty text node lying around in the document. So I delete empty text
// nodes caused by IME. I have to mark the IME transaction as "fixed", which
// means that furure IME txns won't merge with it. This is because we don't
// want future IME txns trying to put their text into a node that is no
// longer in the document. This does not break undo/redo, because all these
// txns are wrapped in a parent PlaceHolder txn, and placeholder txns are
// already savvy to having multiple ime txns inside them.
// Delete empty IME text node if there is one
if (IsHTMLEditor() && isIMETransaction && mComposition) {
RefPtr<Text> textNode = mComposition->GetContainerTextNode();
if (textNode && !textNode->Length()) {
rv = DeleteNodeWithTransaction(*textNode);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DeleteNodeTransaction() failed");
if (MOZ_LIKELY(!textNode->IsInComposedDoc())) {
mComposition->OnTextNodeRemoved();
}
static_cast<CompositionTransaction*>(transaction.get())->MarkFixed();
}
}
if (NS_WARN_IF(Destroyed())) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
InsertTextTransaction* const insertTextTransaction =
transaction->GetAsInsertTextTransaction();
return insertTextTransaction
? InsertTextResult(std::move(endOfInsertedText),
insertTextTransaction
->SuggestPointToPutCaret<EditorDOMPoint>())
: InsertTextResult(std::move(endOfInsertedText));
}
nsresult EditorBase::NotifyDocumentListeners(
TDocumentListenerNotification aNotificationType) {
switch (aNotificationType) {
case eDocumentCreated:
if (IsTextEditor()) {
return NS_OK;
}
if (RefPtr<ComposerCommandsUpdater> composerCommandsUpdate =
AsHTMLEditor()->mComposerCommandsUpdater) {
composerCommandsUpdate->OnHTMLEditorCreated();
}
return NS_OK;
case eDocumentToBeDestroyed: {
RefPtr<ComposerCommandsUpdater> composerCommandsUpdate =
IsHTMLEditor() ? AsHTMLEditor()->mComposerCommandsUpdater : nullptr;
if (!mDocStateListeners.Length() && !composerCommandsUpdate) {
return NS_OK;
}
// Needs to store all listeners before notifying ComposerCommandsUpdate
// since notifying it might change mDocStateListeners.
const AutoDocumentStateListenerArray listeners(
mDocStateListeners.Clone());
if (composerCommandsUpdate) {
composerCommandsUpdate->OnBeforeHTMLEditorDestroyed();
}
for (auto& listener : listeners) {
// MOZ_KnownLive because 'listeners' is guaranteed to
// keep it alive.
//
// This can go away once
// https://bugzilla.mozilla.org/show_bug.cgi?id=1620312 is fixed.
nsresult rv = MOZ_KnownLive(listener)->NotifyDocumentWillBeDestroyed();
if (NS_FAILED(rv)) {
NS_WARNING(
"nsIDocumentStateListener::NotifyDocumentWillBeDestroyed() "
"failed");
return rv;
}
}
return NS_OK;
}
case eDocumentStateChanged: {
bool docIsDirty;
nsresult rv = GetDocumentModified(&docIsDirty);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::GetDocumentModified() failed");
return rv;
}
if (static_cast<int8_t>(docIsDirty) == mDocDirtyState) {
return NS_OK;
}
mDocDirtyState = docIsDirty;
RefPtr<ComposerCommandsUpdater> composerCommandsUpdate =
IsHTMLEditor() ? AsHTMLEditor()->mComposerCommandsUpdater : nullptr;
if (!mDocStateListeners.Length() && !composerCommandsUpdate) {
return NS_OK;
}
// Needs to store all listeners before notifying ComposerCommandsUpdate
// since notifying it might change mDocStateListeners.
const AutoDocumentStateListenerArray listeners(
mDocStateListeners.Clone());
if (composerCommandsUpdate) {
composerCommandsUpdate->OnHTMLEditorDirtyStateChanged(mDocDirtyState);
}
for (auto& listener : listeners) {
// MOZ_KnownLive because 'listeners' is guaranteed to
// keep it alive.
//
// This can go away once
// https://bugzilla.mozilla.org/show_bug.cgi?id=1620312 is fixed.
nsresult rv =
MOZ_KnownLive(listener)->NotifyDocumentStateChanged(mDocDirtyState);
if (NS_FAILED(rv)) {
NS_WARNING(
"nsIDocumentStateListener::NotifyDocumentStateChanged() failed");
return rv;
}
}
return NS_OK;
}
default:
MOZ_ASSERT_UNREACHABLE("Unknown notification");
return NS_ERROR_FAILURE;
}
}
nsresult EditorBase::SetTextNodeWithoutTransaction(const nsAString& aString,
Text& aTextNode) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(IsTextEditor());
MOZ_ASSERT(!IsUndoRedoEnabled());
const uint32_t length = aTextNode.Length();
// Let listeners know what's up
if (!mActionListeners.IsEmpty() && length) {
for (auto& listener : mActionListeners.Clone()) {
DebugOnly<nsresult> rvIgnored =
listener->WillDeleteText(MOZ_KnownLive(&aTextNode), 0, length);
if (NS_WARN_IF(Destroyed())) {
NS_WARNING(
"nsIEditActionListener::WillDeleteText() failed, but ignored");
return NS_ERROR_EDITOR_DESTROYED;
}
}
}
// We don't support undo here, so we don't really need all of the transaction
// machinery, therefore we can run our transaction directly, breaking all of
// the rules!
IgnoredErrorResult error;
DoSetText(aTextNode, aString, error);
if (MOZ_UNLIKELY(error.Failed())) {
NS_WARNING("EditorBase::DoSetText() failed");
return error.StealNSResult();
}
CollapseSelectionTo(EditorRawDOMPoint(&aTextNode, aString.Length()), error);
if (MOZ_UNLIKELY(error.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
NS_WARNING("EditorBase::CollapseSelection() caused destroying the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_ASSERTION(!error.Failed(),
"EditorBase::CollapseSelectionTo() failed, but ignored");
RangeUpdaterRef().SelAdjReplaceText(aTextNode, 0, length, aString.Length());
// Let listeners know what happened
if (!mActionListeners.IsEmpty() && !aString.IsEmpty()) {
for (auto& listener : mActionListeners.Clone()) {
DebugOnly<nsresult> rvIgnored =
listener->DidInsertText(&aTextNode, 0, aString, NS_OK);
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIEditActionListener::DidInsertText() failed, but ignored");
}
}
return NS_OK;
}
Result<CaretPoint, nsresult> EditorBase::DeleteTextWithTransaction(
Text& aTextNode, uint32_t aOffset, uint32_t aLength) {
MOZ_ASSERT(IsEditActionDataAvailable());
RefPtr<DeleteTextTransaction> transaction =
DeleteTextTransaction::MaybeCreate(*this, aTextNode, aOffset, aLength);
if (MOZ_UNLIKELY(!transaction)) {
NS_WARNING("DeleteTextTransaction::MaybeCreate() failed");
return Err(NS_ERROR_FAILURE);
}
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eDeleteText, nsIEditor::ePrevious, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return Err(ignoredError.StealNSResult());
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"TextEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
// Let listeners know what's up
if (!mActionListeners.IsEmpty()) {
for (auto& listener : mActionListeners.Clone()) {
DebugOnly<nsresult> rvIgnored =
listener->WillDeleteText(&aTextNode, aOffset, aLength);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIEditActionListener::WillDeleteText() failed, but ignored");
}
}
nsresult rv = DoTransactionInternal(transaction);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DoTransactionInternal() failed");
if (IsHTMLEditor()) {
TopLevelEditSubActionDataRef().DidDeleteText(
*this, EditorRawDOMPoint(&aTextNode, aOffset));
}
if (NS_WARN_IF(Destroyed())) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (NS_FAILED(rv)) {
return Err(rv);
}
return CaretPoint(transaction->SuggestPointToPutCaret());
}
bool EditorBase::IsRoot(const nsINode* inNode) const {
if (NS_WARN_IF(!inNode)) {
return false;
}
nsINode* rootNode = GetRoot();
return inNode == rootNode;
}
bool EditorBase::IsDescendantOfRoot(const nsINode* inNode) const {
if (NS_WARN_IF(!inNode)) {
return false;
}
nsIContent* root = GetRoot();
if (NS_WARN_IF(!root)) {
return false;
}
return inNode->IsInclusiveDescendantOf(root);
}
NS_IMETHODIMP EditorBase::IncrementModificationCount(int32_t inNumMods) {
uint32_t oldModCount = mModCount;
mModCount += inNumMods;
if ((!oldModCount && mModCount) || (oldModCount && !mModCount)) {
DebugOnly<nsresult> rvIgnored =
NotifyDocumentListeners(eDocumentStateChanged);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::NotifyDocumentListeners() failed, but ignored");
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetModificationCount(int32_t* aOutModCount) {
if (NS_WARN_IF(!aOutModCount)) {
return NS_ERROR_INVALID_ARG;
}
*aOutModCount = mModCount;
return NS_OK;
}
NS_IMETHODIMP EditorBase::ResetModificationCount() {
bool doNotify = (mModCount != 0);
mModCount = 0;
if (!doNotify) {
return NS_OK;
}
DebugOnly<nsresult> rvIgnored =
NotifyDocumentListeners(eDocumentStateChanged);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::NotifyDocumentListeners() failed, but ignored");
return NS_OK;
}
template <typename EditorDOMPointType>
EditorDOMPointType EditorBase::GetFirstSelectionStartPoint() const {
MOZ_ASSERT(IsEditActionDataAvailable());
if (MOZ_UNLIKELY(!SelectionRef().RangeCount())) {
return EditorDOMPointType();
}
const nsRange* range = SelectionRef().GetRangeAt(0);
if (MOZ_UNLIKELY(NS_WARN_IF(!range) || NS_WARN_IF(!range->IsPositioned()))) {
return EditorDOMPointType();
}
return EditorDOMPointType(range->StartRef());
}
template <typename EditorDOMPointType>
EditorDOMPointType EditorBase::GetFirstSelectionEndPoint() const {
MOZ_ASSERT(IsEditActionDataAvailable());
if (MOZ_UNLIKELY(!SelectionRef().RangeCount())) {
return EditorDOMPointType();
}
const nsRange* range = SelectionRef().GetRangeAt(0);
if (MOZ_UNLIKELY(NS_WARN_IF(!range) || NS_WARN_IF(!range->IsPositioned()))) {
return EditorDOMPointType();
}
return EditorDOMPointType(range->EndRef());
}
// static
nsresult EditorBase::GetEndChildNode(const Selection& aSelection,
nsIContent** aEndNode) {
MOZ_ASSERT(aEndNode);
*aEndNode = nullptr;
if (NS_WARN_IF(!aSelection.RangeCount())) {
return NS_ERROR_FAILURE;
}
const nsRange* range = aSelection.GetRangeAt(0);
if (NS_WARN_IF(!range)) {
return NS_ERROR_FAILURE;
}
if (NS_WARN_IF(!range->IsPositioned())) {
return NS_ERROR_FAILURE;
}
NS_IF_ADDREF(*aEndNode = range->GetChildAtEndOffset());
return NS_OK;
}
nsresult EditorBase::EnsurePaddingBRElementInMultilineEditor() {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(IsInPlaintextMode());
MOZ_ASSERT(!IsSingleLineEditor());
Element* anonymousDivOrBodyElement = GetRoot();
if (NS_WARN_IF(!anonymousDivOrBodyElement)) {
return NS_ERROR_FAILURE;
}
// Assuming EditorBase::MaybeCreatePaddingBRElementForEmptyEditor() has been
// called first.
// XXX This assumption is wrong. This method may be called alone. Actually,
// we see this warning in mochitest log. So, we should fix this bug
// later.
if (NS_WARN_IF(!anonymousDivOrBodyElement->GetLastChild())) {
return NS_ERROR_FAILURE;
}
RefPtr<HTMLBRElement> brElement =
HTMLBRElement::FromNode(anonymousDivOrBodyElement->GetLastChild());
if (!brElement) {
// TODO: Remove AutoTransactionsConserveSelection here. It's not necessary
// in normal cases. However, it may be required for nested edit
// actions which may be caused by legacy mutation event listeners or
// chrome script.
AutoTransactionsConserveSelection dontChangeMySelection(*this);
EditorDOMPoint endOfAnonymousDiv(
EditorDOMPoint::AtEndOf(*anonymousDivOrBodyElement));
Result<CreateElementResult, nsresult> insertPaddingBRElementResult =
InsertPaddingBRElementForEmptyLastLineWithTransaction(
endOfAnonymousDiv);
if (MOZ_UNLIKELY(insertPaddingBRElementResult.isErr())) {
NS_WARNING(
"EditorBase::InsertPaddingBRElementForEmptyLastLineWithTransaction() "
"failed");
return insertPaddingBRElementResult.unwrapErr();
}
insertPaddingBRElementResult.inspect().IgnoreCaretPointSuggestion();
return NS_OK;
}
// Check to see if the trailing BR is a former padding <br> element for empty
// editor - this will have stuck around if we previously morphed a trailing
// node into a padding <br> element.
if (!brElement->IsPaddingForEmptyEditor()) {
return NS_OK;
}
// Morph it back to a padding <br> element for empty last line.
brElement->UnsetFlags(NS_PADDING_FOR_EMPTY_EDITOR);
brElement->SetFlags(NS_PADDING_FOR_EMPTY_LAST_LINE);
return NS_OK;
}
void EditorBase::BeginUpdateViewBatch(const char* aRequesterFuncName) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(mUpdateCount >= 0, "bad state");
if (!mUpdateCount) {
// Turn off selection updates and notifications.
SelectionRef().StartBatchChanges(aRequesterFuncName);
}
mUpdateCount++;
}
void EditorBase::EndUpdateViewBatch(const char* aRequesterFuncName) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(mUpdateCount > 0, "bad state");
if (NS_WARN_IF(mUpdateCount <= 0)) {
mUpdateCount = 0;
return;
}
if (--mUpdateCount) {
return;
}
// Turn selection updating and notifications back on.
SelectionRef().EndBatchChanges(aRequesterFuncName);
}
TextComposition* EditorBase::GetComposition() const { return mComposition; }
template <typename EditorDOMPointType>
EditorDOMPointType EditorBase::GetFirstIMESelectionStartPoint() const {
return mComposition
? EditorDOMPointType(mComposition->FirstIMESelectionStartRef())
: EditorDOMPointType();
}
template <typename EditorDOMPointType>
EditorDOMPointType EditorBase::GetLastIMESelectionEndPoint() const {
return mComposition
? EditorDOMPointType(mComposition->LastIMESelectionEndRef())
: EditorDOMPointType();
}
bool EditorBase::IsIMEComposing() const {
return mComposition && mComposition->IsComposing();
}
bool EditorBase::ShouldHandleIMEComposition() const {
// When the editor is being reframed, the old value may be restored with
// InsertText(). In this time, the text should be inserted as not a part
// of the composition.
return mComposition && mDidPostCreate;
}
bool EditorBase::EnsureComposition(WidgetCompositionEvent& aCompositionEvent) {
if (mComposition) {
return true;
}
// The compositionstart event must cause creating new TextComposition
// instance at being dispatched by IMEStateManager.
mComposition = IMEStateManager::GetTextCompositionFor(&aCompositionEvent);
if (!mComposition) {
// However, TextComposition may be committed before the composition
// event comes here.
return false;
}
mComposition->StartHandlingComposition(this);
return true;
}
nsresult EditorBase::OnCompositionStart(
WidgetCompositionEvent& aCompositionStartEvent) {
if (mComposition) {
NS_WARNING("There was a composition at receiving compositionstart event");
return NS_OK;
}
// "beforeinput" event shouldn't be fired before "compositionstart".
AutoEditActionDataSetter editActionData(*this, EditAction::eStartComposition);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
EnsureComposition(aCompositionStartEvent);
NS_WARNING_ASSERTION(mComposition, "Failed to get TextComposition instance?");
return NS_OK;
}
nsresult EditorBase::OnCompositionChange(
WidgetCompositionEvent& aCompositionChangeEvent) {
MOZ_ASSERT(aCompositionChangeEvent.mMessage == eCompositionChange,
"The event should be eCompositionChange");
if (!mComposition) {
NS_WARNING(
"There is no composition, but receiving compositionchange event");
return NS_ERROR_FAILURE;
}
AutoEditActionDataSetter editActionData(*this,
EditAction::eUpdateComposition);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
// If:
// - new composition string is not empty,
// - there is no composition string in the DOM tree,
// - and there is non-collapsed Selection,
// the selected content will be removed by this composition.
if (aCompositionChangeEvent.mData.IsEmpty() &&
mComposition->String().IsEmpty() && !SelectionRef().IsCollapsed()) {
editActionData.UpdateEditAction(EditAction::eDeleteByComposition);
}
// If Input Events Level 2 is enabled, EditAction::eDeleteByComposition is
// mapped to EditorInputType::eDeleteByComposition and it requires null
// for InputEvent.data. Therefore, only otherwise, we should set data.
if (ToInputType(editActionData.GetEditAction()) !=
EditorInputType::eDeleteByComposition) {
MOZ_ASSERT(ToInputType(editActionData.GetEditAction()) ==
EditorInputType::eInsertCompositionText);
MOZ_ASSERT(!aCompositionChangeEvent.mData.IsVoid());
editActionData.SetData(aCompositionChangeEvent.mData);
}
// If we're an `HTMLEditor` and this is second or later composition change,
// we should set target range to the range of composition string.
// Otherwise, set target ranges to selection ranges (will be done by
// editActionData itself before dispatching `beforeinput` event).
if (IsHTMLEditor() && mComposition->GetContainerTextNode()) {
RefPtr<StaticRange> targetRange = StaticRange::Create(
mComposition->GetContainerTextNode(),
mComposition->XPOffsetInTextNode(),
mComposition->GetContainerTextNode(),
mComposition->XPEndOffsetInTextNode(), IgnoreErrors());
NS_WARNING_ASSERTION(targetRange && targetRange->IsPositioned(),
"StaticRange::Create() failed");
if (targetRange && targetRange->IsPositioned()) {
editActionData.AppendTargetRange(*targetRange);
}
}
// TODO: We need to use different EditAction value for beforeinput event
// if the event is followed by "compositionend" because corresponding
// "input" event will be fired from OnCompositionEnd() later with
// different EditAction value.
// TODO: If Input Events Level 2 is enabled, "beforeinput" event may be
// actually canceled if edit action is eDeleteByComposition. In such
// case, we might need to keep selected text, but insert composition
// string before or after the selection. However, the spec is still
// unstable. We should keep handling the composition since other
// parts including widget may not be ready for such complicated
// behavior.
nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
if (rv != NS_ERROR_EDITOR_ACTION_CANCELED && NS_FAILED(rv)) {
NS_WARNING("MaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
if (!EnsureComposition(aCompositionChangeEvent)) {
NS_WARNING("EditorBase::EnsureComposition() failed");
return NS_OK;
}
if (NS_WARN_IF(!GetPresShell())) {
return NS_ERROR_NOT_INITIALIZED;
}
// NOTE: TextComposition should receive selection change notification before
// CompositionChangeEventHandlingMarker notifies TextComposition of the
// end of handling compositionchange event because TextComposition may
// need to ignore selection changes caused by composition. Therefore,
// CompositionChangeEventHandlingMarker must be destroyed after a call
// of NotifiyEditorObservers(eNotifyEditorObserversOfEnd) or
// NotifiyEditorObservers(eNotifyEditorObserversOfCancel) which notifies
// TextComposition of a selection change.
MOZ_ASSERT(
!mPlaceholderBatch,
"UpdateIMEComposition() must be called without place holder batch");
nsString data(aCompositionChangeEvent.mData);
if (IsHTMLEditor()) {
nsContentUtils::PlatformToDOMLineBreaks(data);
}
{
// This needs to be destroyed before dispatching "input" event from
// the following call of `NotifyEditorObservers`. Therefore, we need to
// put this in this block rather than outside of this.
const bool wasComposing = mComposition->IsComposing();
TextComposition::CompositionChangeEventHandlingMarker
compositionChangeEventHandlingMarker(mComposition,
&aCompositionChangeEvent);
AutoPlaceholderBatch treatAsOneTransaction(*this, *nsGkAtoms::IMETxnName,
ScrollSelectionIntoView::Yes,
__FUNCTION__);
// XXX Why don't we get caret after the DOM mutation?
RefPtr<nsCaret> caret = GetCaret();
MOZ_ASSERT(
mIsInEditSubAction,
"AutoPlaceholderBatch should've notified the observes of before-edit");
// If we're updating composition, we need to ignore normal selection
// which may be updated by the web content.
rv = InsertTextAsSubAction(data, wasComposing ? SelectionHandling::Ignore
: SelectionHandling::Delete);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAsSubAction() failed");
if (caret) {
caret->SetSelection(&SelectionRef());
}
}
// If still composing, we should fire input event via observer.
// Note that if the composition will be committed by the following
// compositionend event, we don't need to notify editor observes of this
// change.
// NOTE: We must notify after the auto batch will be gone.
if (!aCompositionChangeEvent.IsFollowedByCompositionEnd()) {
// If we're a TextEditor, we'll be initialized with a new anonymous subtree,
// which can be caused by reframing from a "input" event listener. At that
// time, we'll move composition from current text node to the new text node
// with using mComposition's data. Therefore, it's important that
// mComposition already has the latest information here.
MOZ_ASSERT_IF(mComposition, mComposition->String() == data);
NotifyEditorObservers(eNotifyEditorObserversOfEnd);
}
return EditorBase::ToGenericNSResult(rv);
}
void EditorBase::OnCompositionEnd(
WidgetCompositionEvent& aCompositionEndEvent) {
if (!mComposition) {
NS_WARNING("There is no composition, but receiving compositionend event");
return;
}
EditAction editAction = aCompositionEndEvent.mData.IsEmpty()
? EditAction::eCancelComposition
: EditAction::eCommitComposition;
AutoEditActionDataSetter editActionData(*this, editAction);
// If Input Events Level 2 is enabled, EditAction::eCancelComposition is
// mapped to EditorInputType::eDeleteCompositionText and it requires null
// for InputEvent.data. Therefore, only otherwise, we should set data.
if (ToInputType(editAction) != EditorInputType::eDeleteCompositionText) {
MOZ_ASSERT(
ToInputType(editAction) == EditorInputType::eInsertCompositionText ||
ToInputType(editAction) == EditorInputType::eInsertFromComposition);
MOZ_ASSERT(!aCompositionEndEvent.mData.IsVoid());
editActionData.SetData(aCompositionEndEvent.mData);
}
// commit the IME transaction..we can get at it via the transaction mgr.
// Note that this means IME won't work without an undo stack!
if (mTransactionManager) {
if (nsCOMPtr<nsITransaction> transaction =
mTransactionManager->PeekUndoStack()) {
if (RefPtr<EditTransactionBase> transactionBase =
transaction->GetAsEditTransactionBase()) {
if (PlaceholderTransaction* placeholderTransaction =
transactionBase->GetAsPlaceholderTransaction()) {
placeholderTransaction->Commit();
}
}
}
}
// Note that this just marks as that we've already handled "beforeinput" for
// preventing assertions in FireInputEvent(). Note that corresponding
// "beforeinput" event for the following "input" event should've already
// been dispatched from `OnCompositionChange()`.
DebugOnly<nsresult> rvIgnored =
editActionData.MaybeDispatchBeforeInputEvent();
MOZ_ASSERT(rvIgnored != NS_ERROR_EDITOR_ACTION_CANCELED,
"Why beforeinput event was canceled in this case?");
MOZ_ASSERT(NS_SUCCEEDED(rvIgnored),
"MaybeDispatchBeforeInputEvent() should just mark the instance as "
"handled it");
// Composition string may have hidden the caret. Therefore, we need to
// cancel it here.
HideCaret(false);
// FYI: mComposition still keeps storing container text node of committed
// string, its offset and length. However, they will be invalidated
// soon since its Destroy() will be called by IMEStateManager.
mComposition->EndHandlingComposition(this);
mComposition = nullptr;
// notify editor observers of action
// FYI: With current draft, "input" event should be fired from
// OnCompositionChange(), however, it requires a lot of our UI code
// change and does not make sense. See spec issue:
// https://github.com/w3c/uievents/issues/202
NotifyEditorObservers(eNotifyEditorObserversOfEnd);
}
void EditorBase::DoAfterDoTransaction(nsITransaction* aTransaction) {
bool isTransientTransaction;
MOZ_ALWAYS_SUCCEEDS(aTransaction->GetIsTransient(&isTransientTransaction));
if (!isTransientTransaction) {
// we need to deal here with the case where the user saved after some
// edits, then undid one or more times. Then, the undo count is -ve,
// but we can't let a do take it back to zero. So we flip it up to
// a +ve number.
int32_t modCount;
DebugOnly<nsresult> rvIgnored = GetModificationCount(&modCount);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::GetModificationCount() failed, but ignored");
if (modCount < 0) {
modCount = -modCount;
}
// don't count transient transactions
MOZ_ALWAYS_SUCCEEDS(IncrementModificationCount(1));
}
}
void EditorBase::DoAfterUndoTransaction() {
// all undoable transactions are non-transient
MOZ_ALWAYS_SUCCEEDS(IncrementModificationCount(-1));
}
void EditorBase::DoAfterRedoTransaction() {
// all redoable transactions are non-transient
MOZ_ALWAYS_SUCCEEDS(IncrementModificationCount(1));
}
already_AddRefed<DeleteMultipleRangesTransaction>
EditorBase::CreateTransactionForDeleteSelection(
HowToHandleCollapsedRange aHowToHandleCollapsedRange,
const AutoRangeArray& aRangesToDelete) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
// Check whether the selection is collapsed and we should do nothing:
if (NS_WARN_IF(aRangesToDelete.IsCollapsed() &&
aHowToHandleCollapsedRange ==
HowToHandleCollapsedRange::Ignore)) {
return nullptr;
}
// allocate the out-param transaction
RefPtr<DeleteMultipleRangesTransaction> transaction =
DeleteMultipleRangesTransaction::Create();
for (const OwningNonNull<nsRange>& range : aRangesToDelete.Ranges()) {
// Same with range as with selection; if it is collapsed and action
// is eNone, do nothing.
if (!range->Collapsed()) {
RefPtr<DeleteRangeTransaction> deleteRangeTransaction =
DeleteRangeTransaction::Create(*this, range);
// XXX Oh, not checking if deleteRangeTransaction can modify the range...
transaction->AppendChild(*deleteRangeTransaction);
continue;
}
if (aHowToHandleCollapsedRange == HowToHandleCollapsedRange::Ignore) {
continue;
}
// Let's extend the collapsed range to delete content around it.
RefPtr<DeleteContentTransactionBase> deleteNodeOrTextTransaction =
CreateTransactionForCollapsedRange(range, aHowToHandleCollapsedRange);
// XXX When there are two or more ranges and at least one of them is
// not editable, deleteNodeOrTextTransaction may be nullptr.
// In such case, should we stop removing other ranges too?
if (!deleteNodeOrTextTransaction) {
NS_WARNING("EditorBase::CreateTransactionForCollapsedRange() failed");
return nullptr;
}
transaction->AppendChild(*deleteNodeOrTextTransaction);
}
return transaction.forget();
}
// XXX: currently, this doesn't handle edge conditions because GetNext/GetPrior
// are not implemented
already_AddRefed<DeleteContentTransactionBase>
EditorBase::CreateTransactionForCollapsedRange(
const nsRange& aCollapsedRange,
HowToHandleCollapsedRange aHowToHandleCollapsedRange) {
MOZ_ASSERT(aCollapsedRange.Collapsed());
MOZ_ASSERT(
aHowToHandleCollapsedRange == HowToHandleCollapsedRange::ExtendBackward ||
aHowToHandleCollapsedRange == HowToHandleCollapsedRange::ExtendForward);
EditorRawDOMPoint point(aCollapsedRange.StartRef());
if (NS_WARN_IF(!point.IsSet())) {
return nullptr;
}
if (IsTextEditor()) {
// There should be only one text node in the anonymous `<div>` (but may
// be followed by a padding `<br>`). We should adjust the point into
// the text node (or return nullptr if there is no text to delete) for
// avoiding finding the text node with complicated API.
if (!point.IsInTextNode()) {
const Element* anonymousDiv = GetRoot();
if (NS_WARN_IF(!anonymousDiv)) {
return nullptr;
}
if (!anonymousDiv->GetFirstChild() ||
!anonymousDiv->GetFirstChild()->IsText()) {
return nullptr; // The value is empty.
}
if (point.GetContainer() == anonymousDiv) {
if (point.IsStartOfContainer()) {
point.Set(anonymousDiv->GetFirstChild(), 0);
} else {
point.SetToEndOf(anonymousDiv->GetFirstChild());
}
} else {
// Must be referring a padding `<br>` element or after the text node.
point.SetToEndOf(anonymousDiv->GetFirstChild());
}
}
MOZ_ASSERT(!point.ContainerAs<Text>()->GetPreviousSibling());
MOZ_ASSERT(!point.ContainerAs<Text>()->GetNextSibling() ||
!point.ContainerAs<Text>()->GetNextSibling()->IsText());
if (aHowToHandleCollapsedRange ==
HowToHandleCollapsedRange::ExtendBackward &&
point.IsStartOfContainer()) {
return nullptr;
}
if (aHowToHandleCollapsedRange ==
HowToHandleCollapsedRange::ExtendForward &&
point.IsEndOfContainer()) {
return nullptr;
}
}
// XXX: if the container of point is empty, then we'll need to delete the node
// as well as the 1 child
// build a transaction for deleting the appropriate data
// XXX: this has to come from rule section
const Element* const anonymousDivOrEditingHost =
IsTextEditor() ? GetRoot() : AsHTMLEditor()->ComputeEditingHost();
if (aHowToHandleCollapsedRange == HowToHandleCollapsedRange::ExtendBackward &&
point.IsStartOfContainer()) {
MOZ_ASSERT(IsHTMLEditor());
// We're backspacing from the beginning of a node. Delete the last thing
// of previous editable content.
nsIContent* previousEditableContent = HTMLEditUtils::GetPreviousContent(
*point.GetContainer(), {WalkTreeOption::IgnoreNonEditableNode},
anonymousDivOrEditingHost);
if (!previousEditableContent) {
NS_WARNING("There was no editable content before the collapsed range");
return nullptr;
}
// There is an editable content, so delete its last child (if a text node,
// delete the last char). If it has no children, delete it.
if (previousEditableContent->IsText()) {
uint32_t length = previousEditableContent->Length();
// Bail out for empty text node.
// XXX Do we want to do something else?
// XXX If other browsers delete empty text node, we should follow it.
if (NS_WARN_IF(!length)) {
NS_WARNING("Previous editable content was an empty text node");
return nullptr;
}
RefPtr<DeleteTextTransaction> deleteTextTransaction =
DeleteTextTransaction::MaybeCreateForPreviousCharacter(
*this, *previousEditableContent->AsText(), length);
if (!deleteTextTransaction) {
NS_WARNING(
"DeleteTextTransaction::MaybeCreateForPreviousCharacter() failed");
return nullptr;
}
return deleteTextTransaction.forget();
}
if (IsHTMLEditor() &&
NS_WARN_IF(!HTMLEditUtils::IsRemovableNode(*previousEditableContent))) {
return nullptr;
}
RefPtr<DeleteNodeTransaction> deleteNodeTransaction =
DeleteNodeTransaction::MaybeCreate(*this, *previousEditableContent);
if (!deleteNodeTransaction) {
NS_WARNING("DeleteNodeTransaction::MaybeCreate() failed");
return nullptr;
}
return deleteNodeTransaction.forget();
}
if (aHowToHandleCollapsedRange == HowToHandleCollapsedRange::ExtendForward &&
point.IsEndOfContainer()) {
MOZ_ASSERT(IsHTMLEditor());
// We're deleting from the end of a node. Delete the first thing of
// next editable content.
nsIContent* nextEditableContent = HTMLEditUtils::GetNextContent(
*point.GetContainer(), {WalkTreeOption::IgnoreNonEditableNode},
anonymousDivOrEditingHost);
if (!nextEditableContent) {
NS_WARNING("There was no editable content after the collapsed range");
return nullptr;
}
// There is an editable content, so delete its first child (if a text node,
// delete the first char). If it has no children, delete it.
if (nextEditableContent->IsText()) {
uint32_t length = nextEditableContent->Length();
// Bail out for empty text node.
// XXX Do we want to do something else?
// XXX If other browsers delete empty text node, we should follow it.
if (!length) {
NS_WARNING("Next editable content was an empty text node");
return nullptr;
}
RefPtr<DeleteTextTransaction> deleteTextTransaction =
DeleteTextTransaction::MaybeCreateForNextCharacter(
*this, *nextEditableContent->AsText(), 0);
if (!deleteTextTransaction) {
NS_WARNING(
"DeleteTextTransaction::MaybeCreateForNextCharacter() failed");
return nullptr;
}
return deleteTextTransaction.forget();
}
if (IsHTMLEditor() &&
NS_WARN_IF(!HTMLEditUtils::IsRemovableNode(*nextEditableContent))) {
return nullptr;
}
RefPtr<DeleteNodeTransaction> deleteNodeTransaction =
DeleteNodeTransaction::MaybeCreate(*this, *nextEditableContent);
if (!deleteNodeTransaction) {
NS_WARNING("DeleteNodeTransaction::MaybeCreate() failed");
return nullptr;
}
return deleteNodeTransaction.forget();
}
if (point.IsInTextNode()) {
if (aHowToHandleCollapsedRange ==
HowToHandleCollapsedRange::ExtendBackward) {
RefPtr<DeleteTextTransaction> deleteTextTransaction =
DeleteTextTransaction::MaybeCreateForPreviousCharacter(
*this, *point.ContainerAs<Text>(), point.Offset());
NS_WARNING_ASSERTION(
deleteTextTransaction,
"DeleteTextTransaction::MaybeCreateForPreviousCharacter() failed");
return deleteTextTransaction.forget();
}
RefPtr<DeleteTextTransaction> deleteTextTransaction =
DeleteTextTransaction::MaybeCreateForNextCharacter(
*this, *point.ContainerAs<Text>(), point.Offset());
NS_WARNING_ASSERTION(
deleteTextTransaction,
"DeleteTextTransaction::MaybeCreateForNextCharacter() failed");
return deleteTextTransaction.forget();
}
nsIContent* editableContent = nullptr;
if (IsHTMLEditor()) {
editableContent =
aHowToHandleCollapsedRange == HowToHandleCollapsedRange::ExtendBackward
? HTMLEditUtils::GetPreviousContent(
point, {WalkTreeOption::IgnoreNonEditableNode},
anonymousDivOrEditingHost)
: HTMLEditUtils::GetNextContent(
point, {WalkTreeOption::IgnoreNonEditableNode},
anonymousDivOrEditingHost);
if (!editableContent) {
NS_WARNING("There was no editable content around the collapsed range");
return nullptr;
}
while (editableContent && editableContent->IsCharacterData() &&
!editableContent->Length()) {
// Can't delete an empty text node (bug 762183)
editableContent =
aHowToHandleCollapsedRange ==
HowToHandleCollapsedRange::ExtendBackward
? HTMLEditUtils::GetPreviousContent(
*editableContent, {WalkTreeOption::IgnoreNonEditableNode},
anonymousDivOrEditingHost)
: HTMLEditUtils::GetNextContent(
*editableContent, {WalkTreeOption::IgnoreNonEditableNode},
anonymousDivOrEditingHost);
}
if (!editableContent) {
NS_WARNING(
"There was no editable content which is not empty around the "
"collapsed range");
return nullptr;
}
} else {
MOZ_ASSERT(point.IsInTextNode());
editableContent = point.GetContainerAs<nsIContent>();
if (!editableContent) {
NS_WARNING("If there was no text node, should've been handled first");
return nullptr;
}
}
if (editableContent->IsText()) {
if (aHowToHandleCollapsedRange ==
HowToHandleCollapsedRange::ExtendBackward) {
RefPtr<DeleteTextTransaction> deleteTextTransaction =
DeleteTextTransaction::MaybeCreateForPreviousCharacter(
*this, *editableContent->AsText(), editableContent->Length());
NS_WARNING_ASSERTION(
deleteTextTransaction,
"DeleteTextTransaction::MaybeCreateForPreviousCharacter() failed");
return deleteTextTransaction.forget();
}
RefPtr<DeleteTextTransaction> deleteTextTransaction =
DeleteTextTransaction::MaybeCreateForNextCharacter(
*this, *editableContent->AsText(), 0);
NS_WARNING_ASSERTION(
deleteTextTransaction,
"DeleteTextTransaction::MaybeCreateForNextCharacter() failed");
return deleteTextTransaction.forget();
}
MOZ_ASSERT(IsHTMLEditor());
if (NS_WARN_IF(!HTMLEditUtils::IsRemovableNode(*editableContent))) {
return nullptr;
}
RefPtr<DeleteNodeTransaction> deleteNodeTransaction =
DeleteNodeTransaction::MaybeCreate(*this, *editableContent);
NS_WARNING_ASSERTION(deleteNodeTransaction,
"DeleteNodeTransaction::MaybeCreate() failed");
return deleteNodeTransaction.forget();
}
bool EditorBase::FlushPendingNotificationsIfToHandleDeletionWithFrameSelection(
nsIEditor::EDirection aDirectionAndAmount) const {
MOZ_ASSERT(IsEditActionDataAvailable());
if (NS_WARN_IF(Destroyed())) {
return false;
}
if (!EditorUtils::IsFrameSelectionRequiredToExtendSelection(
aDirectionAndAmount, SelectionRef())) {
return true;
}
// Although AutoRangeArray::ExtendAnchorFocusRangeFor() will use
// nsFrameSelection, if it still has dirty frame, nsFrameSelection doesn't
// extend selection since we block script.
if (RefPtr<PresShell> presShell = GetPresShell()) {
presShell->FlushPendingNotifications(FlushType::Layout);
if (NS_WARN_IF(Destroyed())) {
return false;
}
}
return true;
}
nsresult EditorBase::DeleteSelectionAsAction(
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers, nsIPrincipal* aPrincipal) {
MOZ_ASSERT(aStripWrappers == eStrip || aStripWrappers == eNoStrip);
// Showing this assertion is fine if this method is called by outside via
// mutation event listener or something. Otherwise, this is called by
// wrong method.
NS_ASSERTION(
!mPlaceholderBatch,
"Should be called only when this is the only edit action of the "
"operation unless mutation event listener nests some operations");
// If we're a TextEditor instance, we don't need to treat parent elements
// so that we can ignore aStripWrappers for skipping unnecessary cost.
if (IsTextEditor()) {
aStripWrappers = nsIEditor::eNoStrip;
}
EditAction editAction = EditAction::eDeleteSelection;
switch (aDirectionAndAmount) {
case nsIEditor::ePrevious:
editAction = EditAction::eDeleteBackward;
break;
case nsIEditor::eNext:
editAction = EditAction::eDeleteForward;
break;
case nsIEditor::ePreviousWord:
editAction = EditAction::eDeleteWordBackward;
break;
case nsIEditor::eNextWord:
editAction = EditAction::eDeleteWordForward;
break;
case nsIEditor::eToBeginningOfLine:
editAction = EditAction::eDeleteToBeginningOfSoftLine;
break;
case nsIEditor::eToEndOfLine:
editAction = EditAction::eDeleteToEndOfSoftLine;
break;
}
AutoEditActionDataSetter editActionData(*this, editAction, aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
// If there is an existing selection when an extended delete is requested,
// platforms that use "caret-style" caret positioning collapse the
// selection to the start and then create a new selection.
// Platforms that use "selection-style" caret positioning just delete the
// existing selection without extending it.
if (!SelectionRef().IsCollapsed()) {
switch (aDirectionAndAmount) {
case eNextWord:
case ePreviousWord:
case eToBeginningOfLine:
case eToEndOfLine: {
if (mCaretStyle != 1) {
aDirectionAndAmount = eNone;
break;
}
ErrorResult error;
SelectionRef().CollapseToStart(error);
if (NS_WARN_IF(Destroyed())) {
error.SuppressException();
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_DESTROYED);
}
if (error.Failed()) {
NS_WARNING("Selection::CollapseToStart() failed");
editActionData.Abort();
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
break;
}
default:
break;
}
}
// If Selection is still NOT collapsed, it does not important removing
// range of the operation since we'll remove the selected content. However,
// information of direction (backward or forward) may be important for
// web apps. E.g., web apps may want to mark selected range as "deleted"
// and move caret before or after the range. Therefore, we should forget
// only the range information but keep range information. See discussion
// of the spec issue for the detail:
// https://github.com/w3c/input-events/issues/82
if (!SelectionRef().IsCollapsed()) {
switch (editAction) {
case EditAction::eDeleteWordBackward:
case EditAction::eDeleteToBeginningOfSoftLine:
editActionData.UpdateEditAction(EditAction::eDeleteBackward);
break;
case EditAction::eDeleteWordForward:
case EditAction::eDeleteToEndOfSoftLine:
editActionData.UpdateEditAction(EditAction::eDeleteForward);
break;
default:
break;
}
}
editActionData.SetSelectionCreatedByDoubleclick(
SelectionRef().GetFrameSelection() &&
SelectionRef().GetFrameSelection()->IsDoubleClickSelection());
if (!FlushPendingNotificationsIfToHandleDeletionWithFrameSelection(
aDirectionAndAmount)) {
NS_WARNING("Flusing pending notifications caused destroying the editor");
editActionData.Abort();
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_DESTROYED);
}
nsresult rv =
editActionData.MaybeDispatchBeforeInputEvent(aDirectionAndAmount);
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
// delete placeholder txns merge.
AutoPlaceholderBatch treatAsOneTransaction(*this, *nsGkAtoms::DeleteTxnName,
ScrollSelectionIntoView::Yes,
__FUNCTION__);
rv = DeleteSelectionAsSubAction(aDirectionAndAmount, aStripWrappers);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DeleteSelectionAsSubAction() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::DeleteSelectionAsSubAction(
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers) {
MOZ_ASSERT(IsEditActionDataAvailable());
// If handling edit action is for table editing, this may be called with
// selecting an any table element by the caller, but it's not usual work of
// this so that `MayEditActionDeleteSelection()` returns false.
MOZ_ASSERT(MayEditActionDeleteSelection(GetEditAction()) ||
IsEditActionTableEditing(GetEditAction()));
MOZ_ASSERT(mPlaceholderBatch);
MOZ_ASSERT(aStripWrappers == eStrip || aStripWrappers == eNoStrip);
NS_ASSERTION(IsHTMLEditor() || aStripWrappers == nsIEditor::eNoStrip,
"TextEditor does not support strip wrappers");
if (NS_WARN_IF(!mInitSucceeded)) {
return NS_ERROR_NOT_INITIALIZED;
}
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eDeleteSelectedContent, aDirectionAndAmount,
ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"TextEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
{
Result<EditActionResult, nsresult> result =
HandleDeleteSelection(aDirectionAndAmount, aStripWrappers);
if (MOZ_UNLIKELY(result.isErr())) {
NS_WARNING("TextEditor::HandleDeleteSelection() failed");
return result.unwrapErr();
}
if (result.inspect().Canceled()) {
return NS_OK;
}
}
// XXX This is odd. We just tries to remove empty text node here but we
// refer `Selection`. It may be modified by mutation event listeners
// so that we should remove the empty text node when we make it empty.
const auto atNewStartOfSelection =
GetFirstSelectionStartPoint<EditorDOMPoint>();
if (NS_WARN_IF(!atNewStartOfSelection.IsSet())) {
// XXX And also it seems that we don't need to return error here.
// Why don't we just ignore? `Selection::RemoveAllRanges()` may
// have been called by mutation event listeners.
return NS_ERROR_FAILURE;
}
if (IsHTMLEditor() && atNewStartOfSelection.IsInTextNode() &&
!atNewStartOfSelection.GetContainer()->Length()) {
nsresult rv = DeleteNodeWithTransaction(
MOZ_KnownLive(*atNewStartOfSelection.ContainerAs<Text>()));
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return rv;
}
}
// XXX I don't think that this is necessary in anonymous `<div>` element of
// TextEditor since there should be at most one text node and at most
// one padding `<br>` element so that `<br>` element won't be before
// caret.
if (!TopLevelEditSubActionDataRef().mDidExplicitlySetInterLine) {
// We prevent the caret from sticking on the left of previous `<br>`
// element (i.e. the end of previous line) after this deletion. Bug 92124.
if (MOZ_UNLIKELY(NS_FAILED(SelectionRef().SetInterlinePosition(
InterlinePosition::StartOfNextLine)))) {
NS_WARNING(
"Selection::SetInterlinePosition(InterlinePosition::StartOfNextLine) "
"failed");
return NS_ERROR_FAILURE; // Don't need to return NS_ERROR_NOT_INITIALIZED
}
}
return NS_OK;
}
nsresult EditorBase::HandleDropEvent(DragEvent* aDropEvent) {
if (NS_WARN_IF(!aDropEvent)) {
return NS_ERROR_INVALID_ARG;
}
DebugOnly<nsresult> rvIgnored = CommitComposition();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"EditorBase::CommitComposition() failed, but ignored");
AutoEditActionDataSetter editActionData(*this, EditAction::eDrop);
// We need to initialize data or dataTransfer later. Therefore, we cannot
// dispatch "beforeinput" event until then.
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<DataTransfer> dataTransfer = aDropEvent->GetDataTransfer();
if (NS_WARN_IF(!dataTransfer)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession();
if (NS_WARN_IF(!dragSession)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsINode> sourceNode = dataTransfer->GetMozSourceNode();
// If there is no source document, then the drag was from another application
// or another process (such as an out of process subframe). The latter case is
// not currently handled below when checking for a move/copy and deleting the
// existing text.
RefPtr<Document> srcdoc;
if (sourceNode) {
srcdoc = sourceNode->OwnerDoc();
}
nsCOMPtr<nsIPrincipal> sourcePrincipal;
dragSession->GetTriggeringPrincipal(getter_AddRefs(sourcePrincipal));
if (nsContentUtils::CheckForSubFrameDrop(
dragSession, aDropEvent->WidgetEventPtr()->AsDragEvent())) {
// Don't allow drags from subframe documents with different origins than
// the drop destination.
if (IsSafeToInsertData(sourcePrincipal) == SafeToInsertData::No) {
return NS_OK;
}
}
// Current doc is destination
RefPtr<Document> document = GetDocument();
if (NS_WARN_IF(!document)) {
return NS_ERROR_NOT_INITIALIZED;
}
const uint32_t numItems = dataTransfer->MozItemCount();
if (NS_WARN_IF(!numItems)) {
return NS_ERROR_FAILURE; // Nothing to drop?
}
// We have to figure out whether to delete and relocate caret only once
// Parent and offset are under the mouse cursor.
int32_t dropOffset = -1;
nsCOMPtr<nsIContent> dropParentContent =
aDropEvent->GetRangeParentContentAndOffset(&dropOffset);
if (dropOffset < 0) {
NS_WARNING(
"DropEvent::GetRangeParentContentAndOffset() returned negative offset");
return NS_ERROR_FAILURE;
}
EditorDOMPoint droppedAt(dropParentContent,
AssertedCast<uint32_t>(dropOffset));
if (NS_WARN_IF(!droppedAt.IsInContentNode())) {
return NS_ERROR_FAILURE;
}
// Check if dropping into a selected range. If so and the source comes from
// same document, jump through some hoops to determine if mouse is over
// selection (bail) and whether user wants to copy selection or delete it.
if (sourceNode && sourceNode->IsEditable() && srcdoc == document) {
bool isPointInSelection = EditorUtils::IsPointInSelection(
SelectionRef(), *droppedAt.GetContainer(), droppedAt.Offset());
if (isPointInSelection) {
// If source document and destination document is same and dropping
// into one of selected ranges, we don't need to do nothing.
// XXX If the source comes from outside of this editor, this check
// means that we don't allow to drop the item in the selected
// range. However, the selection is hidden until the <input> or
// <textarea> gets focus, therefore, this looks odd.
return NS_OK;
}
}
// Delete if user doesn't want to copy when user moves selected content
// to different place in same editor.
// XXX Do we need the check whether it's in same document or not?
RefPtr<EditorBase> editorToDeleteSelection;
if (sourceNode && sourceNode->IsEditable() && srcdoc == document) {
if ((dataTransfer->DropEffectInt() &
nsIDragService::DRAGDROP_ACTION_MOVE) &&
!(dataTransfer->DropEffectInt() &
nsIDragService::DRAGDROP_ACTION_COPY)) {
// If the source node is in native anonymous tree, it must be in
// <input> or <textarea> element. If so, its TextEditor can remove it.
if (sourceNode->IsInNativeAnonymousSubtree()) {
if (RefPtr textControlElement = TextControlElement::FromNodeOrNull(
sourceNode
->GetClosestNativeAnonymousSubtreeRootParentOrHost())) {
editorToDeleteSelection = textControlElement->GetTextEditor();
}
}
// Otherwise, must be the content is in HTMLEditor.
else if (IsHTMLEditor()) {
editorToDeleteSelection = this;
} else {
editorToDeleteSelection =
nsContentUtils::GetHTMLEditor(srcdoc->GetPresContext());
}
}
// If the found editor isn't modifiable, we should not try to delete
// selection.
if (editorToDeleteSelection && !editorToDeleteSelection->IsModifiable()) {
editorToDeleteSelection = nullptr;
}
// If the found editor has collapsed selection, we need to delete nothing
// in the editor.
if (editorToDeleteSelection) {
if (Selection* selection = editorToDeleteSelection->GetSelection()) {
if (selection->IsCollapsed()) {
editorToDeleteSelection = nullptr;
}
}
}
}
if (IsInPlaintextMode()) {
for (nsIContent* content = droppedAt.ContainerAs<nsIContent>(); content;
content = content->GetParent()) {
nsCOMPtr<nsIFormControl> formControl(do_QueryInterface(content));
if (formControl && !formControl->AllowDrop()) {
// Don't allow dropping into a form control that doesn't allow being
// dropped into.
return NS_OK;
}
}
}
// Combine any deletion and drop insertion into one transaction.
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
// Don't dispatch "selectionchange" event until inserting all contents.
SelectionBatcher selectionBatcher(SelectionRef(), __FUNCTION__);
// Track dropped point with nsRange because we shouldn't insert the
// dropped content into different position even if some event listeners
// modify selection. Note that Chrome's behavior is really odd. So,
// we don't need to worry about web-compat about this.
IgnoredErrorResult ignoredError;
RefPtr<nsRange> rangeAtDropPoint =
nsRange::Create(droppedAt.ToRawRangeBoundary(),
droppedAt.ToRawRangeBoundary(), ignoredError);
if (NS_WARN_IF(ignoredError.Failed()) ||
NS_WARN_IF(!rangeAtDropPoint->IsPositioned())) {
editActionData.Abort();
return NS_ERROR_FAILURE;
}
// Remove selected contents first here because we need to fire a pair of
// "beforeinput" and "input" for deletion and web apps can cancel only
// this deletion. Note that callee may handle insertion asynchronously.
// Therefore, it is the best to remove selected content here.
if (editorToDeleteSelection) {
nsresult rv = editorToDeleteSelection->DeleteSelectionByDragAsAction(
mDispatchInputEvent);
if (NS_WARN_IF(Destroyed())) {
editActionData.Abort();
return NS_OK;
}
// Ignore the editor instance specific error if it's another editor.
if (this != editorToDeleteSelection &&
(rv == NS_ERROR_NOT_INITIALIZED || rv == NS_ERROR_EDITOR_DESTROYED)) {
rv = NS_OK;
}
// Don't cancel "insertFromDrop" even if "deleteByDrag" is canceled.
if (rv != NS_ERROR_EDITOR_ACTION_CANCELED && NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteSelectionByDragAsAction() failed");
editActionData.Abort();
return EditorBase::ToGenericNSResult(rv);
}
if (NS_WARN_IF(!rangeAtDropPoint->IsPositioned()) ||
NS_WARN_IF(!rangeAtDropPoint->GetStartContainer()->IsContent())) {
editActionData.Abort();
return NS_ERROR_FAILURE;
}
droppedAt = rangeAtDropPoint->StartRef();
MOZ_ASSERT(droppedAt.IsSetAndValid());
MOZ_ASSERT(droppedAt.IsInContentNode());
}
// Before inserting dropping content, we need to move focus for compatibility
// with Chrome and firing "beforeinput" event on new editing host.
RefPtr<Element> focusedElement, newFocusedElement;
if (IsTextEditor()) {
newFocusedElement = GetExposedRoot();
focusedElement = IsActiveInDOMWindow() ? newFocusedElement : nullptr;
}
// TODO: We need to add automated tests when dropping something into an
// editing host for contenteditable which is in a shadow DOM tree
// and its host which is in design mode.
else if (!AsHTMLEditor()->IsInDesignMode()) {
focusedElement = AsHTMLEditor()->ComputeEditingHost();
if (focusedElement &&
droppedAt.ContainerAs<nsIContent>()->IsInclusiveDescendantOf(
focusedElement)) {
newFocusedElement = focusedElement;
} else {
newFocusedElement = droppedAt.ContainerAs<nsIContent>()->GetEditingHost();
}
}
// Move selection right now. Note that this does not move focus because
// `Selection` moves focus with selection change only when the API caller is
// JS. And also this does not notify selection listeners (nor
// "selectionchange") since we created SelectionBatcher above.
ErrorResult error;
SelectionRef().SetStartAndEnd(droppedAt.ToRawRangeBoundary(),
droppedAt.ToRawRangeBoundary(), error);
if (error.Failed()) {
NS_WARNING("Selection::SetStartAndEnd() failed");
editActionData.Abort();
return error.StealNSResult();
}
if (NS_WARN_IF(Destroyed())) {
editActionData.Abort();
return NS_OK;
}
// Then, move focus if necessary. This must cause dispatching "blur" event
// and "focus" event.
if (newFocusedElement && focusedElement != newFocusedElement) {
RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager();
DebugOnly<nsresult> rvIgnored = fm->SetFocus(newFocusedElement, 0);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsFocusManager::SetFocus() failed to set focus "
"to the element, but ignored");
if (NS_WARN_IF(Destroyed())) {
editActionData.Abort();
return NS_OK;
}
// "blur" or "focus" event listener may have changed the value.
// Let's keep using the original point.
if (NS_WARN_IF(!rangeAtDropPoint->IsPositioned()) ||
NS_WARN_IF(!rangeAtDropPoint->GetStartContainer()->IsContent())) {
return NS_ERROR_FAILURE;
}
droppedAt = rangeAtDropPoint->StartRef();
MOZ_ASSERT(droppedAt.IsSetAndValid());
// If focus is changed to different element and we're handling drop in
// contenteditable, we cannot handle it without focus. So, we should give
// it up.
if (IsHTMLEditor() && !AsHTMLEditor()->IsInDesignMode() &&
NS_WARN_IF(newFocusedElement != AsHTMLEditor()->ComputeEditingHost())) {
editActionData.Abort();
return NS_OK;
}
}
nsresult rv = InsertDroppedDataTransferAsAction(editActionData, *dataTransfer,
droppedAt, sourcePrincipal);
if (rv == NS_ERROR_EDITOR_DESTROYED ||
rv == NS_ERROR_EDITOR_ACTION_CANCELED) {
return EditorBase::ToGenericNSResult(rv);
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::InsertDroppedDataTransferAsAction() failed, but ignored");
rv = ScrollSelectionFocusIntoView();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::ScrollSelectionFocusIntoView() failed");
return rv;
}
nsresult EditorBase::DeleteSelectionByDragAsAction(bool aDispatchInputEvent) {
// TODO: Move this method to `EditorBase`.
AutoRestore<bool> saveDispatchInputEvent(mDispatchInputEvent);
mDispatchInputEvent = aDispatchInputEvent;
// Even if we're handling "deleteByDrag" in same editor as "insertFromDrop",
// we need to recreate edit action data here because
// `AutoEditActionDataSetter` needs to manage event state separately.
bool requestedByAnotherEditor = GetEditAction() != EditAction::eDrop;
AutoEditActionDataSetter editActionData(*this, EditAction::eDeleteByDrag);
MOZ_ASSERT(!SelectionRef().IsCollapsed());
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return rv;
}
// But keep using placeholder transaction for "insertFromDrop" if there is.
Maybe<AutoPlaceholderBatch> treatAsOneTransaction;
if (requestedByAnotherEditor) {
treatAsOneTransaction.emplace(*this, ScrollSelectionIntoView::Yes,
__FUNCTION__);
}
// We may need to update the source node to dispatch "dragend" below.
// Chrome restricts the new target under the <body> here. Therefore, we
// should follow it here.
// https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/core/editing/editing_utilities.cc;l=254;drc=da35f4ed6398ae287d5adc828b9546eec95f668a
const RefPtr<Element> editingHost =
IsHTMLEditor() ? AsHTMLEditor()->ComputeEditingHost(
HTMLEditor::LimitInBodyElement::Yes)
: nullptr;
rv = DeleteSelectionAsSubAction(nsIEditor::eNone, IsTextEditor()
? nsIEditor::eNoStrip
: nsIEditor::eStrip);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteSelectionAsSubAction(eNone) failed");
return rv;
}
if (!mDispatchInputEvent) {
return NS_OK;
}
if (treatAsOneTransaction.isNothing()) {
DispatchInputEvent();
}
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
// If we success everything here, we may need to retarget "dragend" event
// target for compatibility with the other browsers. They do this only when
// their builtin editor delete the source node from the document. Then,
// they retarget the source node to the editing host.
// https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/core/page/drag_controller.cc;l=724;drc=d9ba13b8cd8ac0faed7afc3d1f7e4b67ebac2a0b
if (editingHost) {
if (nsCOMPtr<nsIDragService> dragService =
do_GetService("@mozilla.org/widget/dragservice;1")) {
dragService->MaybeEditorDeletedSourceNode(editingHost);
}
}
return NS_WARN_IF(Destroyed()) ? NS_ERROR_EDITOR_DESTROYED : NS_OK;
}
nsresult EditorBase::DeleteSelectionWithTransaction(
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(aStripWrappers == eStrip || aStripWrappers == eNoStrip);
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
AutoRangeArray rangesToDelete(SelectionRef());
if (NS_WARN_IF(rangesToDelete.Ranges().IsEmpty())) {
NS_ASSERTION(
false,
"For avoiding to throw incompatible exception for `execCommand`, fix "
"the caller");
return NS_ERROR_FAILURE;
}
if (IsTextEditor()) {
if (const Text* theTextNode = AsTextEditor()->GetTextNode()) {
rangesToDelete.EnsureRangesInTextNode(*theTextNode);
}
}
Result<CaretPoint, nsresult> caretPointOrError = DeleteRangesWithTransaction(
aDirectionAndAmount, aStripWrappers, rangesToDelete);
if (MOZ_UNLIKELY(caretPointOrError.isErr())) {
NS_WARNING("EditorBase::DeleteRangesWithTransaction() failed");
return caretPointOrError.unwrapErr();
}
nsresult rv = caretPointOrError.inspect().SuggestCaretPointTo(
*this, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CaretPoint::SuggestCaretPointTo() failed");
}
NS_WARNING_ASSERTION(rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CaretPoint::SuggestCaretPointTo() failed, but ignored");
return NS_OK;
}
Result<CaretPoint, nsresult> EditorBase::DeleteRangesWithTransaction(
nsIEditor::EDirection aDirectionAndAmount,
nsIEditor::EStripWrappers aStripWrappers,
const AutoRangeArray& aRangesToDelete) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!Destroyed());
MOZ_ASSERT(aStripWrappers == eStrip || aStripWrappers == eNoStrip);
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
HowToHandleCollapsedRange howToHandleCollapsedRange =
EditorBase::HowToHandleCollapsedRangeFor(aDirectionAndAmount);
if (NS_WARN_IF(aRangesToDelete.IsCollapsed() &&
howToHandleCollapsedRange ==
HowToHandleCollapsedRange::Ignore)) {
NS_ASSERTION(
false,
"For avoiding to throw incompatible exception for `execCommand`, fix "
"the caller");
return Err(NS_ERROR_FAILURE);
}
RefPtr<DeleteMultipleRangesTransaction> deleteSelectionTransaction =
CreateTransactionForDeleteSelection(howToHandleCollapsedRange,
aRangesToDelete);
if (MOZ_UNLIKELY(!deleteSelectionTransaction)) {
NS_WARNING("EditorBase::CreateTransactionForDeleteSelection() failed");
return Err(NS_ERROR_FAILURE);
}
// XXX This is odd, this assumes that there are no multiple collapsed
// ranges in `Selection`, but it's possible scenario.
// XXX This loop looks slow, but it's rarely so because of multiple
// selection is not used so many times.
nsCOMPtr<nsIContent> deleteContent;
uint32_t deleteCharOffset = 0;
for (const OwningNonNull<EditTransactionBase>& transactionBase :
Reversed(deleteSelectionTransaction->ChildTransactions())) {
if (DeleteTextTransaction* deleteTextTransaction =
transactionBase->GetAsDeleteTextTransaction()) {
deleteContent = deleteTextTransaction->GetText();
deleteCharOffset = deleteTextTransaction->Offset();
break;
}
if (DeleteNodeTransaction* deleteNodeTransaction =
transactionBase->GetAsDeleteNodeTransaction()) {
deleteContent = deleteNodeTransaction->GetContent();
break;
}
}
RefPtr<CharacterData> deleteCharData =
CharacterData::FromNodeOrNull(deleteContent);
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eDeleteSelectedContent, aDirectionAndAmount,
ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return Err(ignoredError.StealNSResult());
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"TextEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
if (IsHTMLEditor()) {
if (!deleteContent) {
// XXX We may remove multiple ranges in the following. Therefore,
// this must have a bug since we only add the first range into
// the changed range.
TopLevelEditSubActionDataRef().WillDeleteRange(
*this, aRangesToDelete.GetFirstRangeStartPoint<EditorRawDOMPoint>(),
aRangesToDelete.GetFirstRangeEndPoint<EditorRawDOMPoint>());
} else if (!deleteCharData) {
TopLevelEditSubActionDataRef().WillDeleteContent(*this, *deleteContent);
}
}
// Notify nsIEditActionListener::WillDelete[Selection|Text]
if (!mActionListeners.IsEmpty()) {
if (!deleteContent) {
MOZ_ASSERT(!aRangesToDelete.Ranges().IsEmpty());
AutoTArray<RefPtr<nsRange>, 8> rangesToDelete(
aRangesToDelete.CloneRanges<RefPtr>());
AutoActionListenerArray listeners(mActionListeners.Clone());
for (auto& listener : listeners) {
DebugOnly<nsresult> rvIgnored =
listener->WillDeleteRanges(rangesToDelete);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIEditActionListener::WillDeleteRanges() failed, but ignored");
MOZ_DIAGNOSTIC_ASSERT(!Destroyed(),
"nsIEditActionListener::WillDeleteRanges() "
"must not destroy the editor");
}
} else if (deleteCharData) {
AutoActionListenerArray listeners(mActionListeners.Clone());
for (auto& listener : listeners) {
// XXX Why don't we notify listeners of actual length?
DebugOnly<nsresult> rvIgnored =
listener->WillDeleteText(deleteCharData, deleteCharOffset, 1);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIEditActionListener::WillDeleteText() failed, but ignored");
MOZ_DIAGNOSTIC_ASSERT(!Destroyed(),
"nsIEditActionListener::WillDeleteText() must "
"not destroy the editor");
}
}
}
// Delete the specified amount
nsresult rv = DoTransactionInternal(deleteSelectionTransaction);
// I'm not sure whether we should keep notifying edit action listeners or
// stop doing it. For now, just keep traditional behavior.
bool destroyedByTransaction = Destroyed();
NS_WARNING_ASSERTION(destroyedByTransaction || NS_SUCCEEDED(rv),
"EditorBase::DoTransactionInternal() failed");
if (IsHTMLEditor() && deleteCharData) {
MOZ_ASSERT(deleteContent);
TopLevelEditSubActionDataRef().DidDeleteText(
*this, EditorRawDOMPoint(deleteContent));
}
if (mTextServicesDocument && NS_SUCCEEDED(rv) && deleteContent &&
!deleteCharData) {
RefPtr<TextServicesDocument> textServicesDocument = mTextServicesDocument;
textServicesDocument->DidDeleteContent(*deleteContent);
MOZ_ASSERT(
destroyedByTransaction || !Destroyed(),
"TextServicesDocument::DidDeleteContent() must not destroy the editor");
}
if (!mActionListeners.IsEmpty() && deleteContent && !deleteCharData) {
for (auto& listener : mActionListeners.Clone()) {
DebugOnly<nsresult> rvIgnored =
listener->DidDeleteNode(deleteContent, rv);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIEditActionListener::DidDeleteNode() failed, but ignored");
MOZ_DIAGNOSTIC_ASSERT(
destroyedByTransaction || !Destroyed(),
"nsIEditActionListener::DidDeleteNode() must not destroy the editor");
}
}
if (NS_WARN_IF(destroyedByTransaction)) {
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (NS_FAILED(rv)) {
return Err(rv);
}
EditorDOMPoint pointToPutCaret =
deleteSelectionTransaction->SuggestPointToPutCaret();
if (IsHTMLEditor() && aStripWrappers == nsIEditor::eStrip) {
const nsCOMPtr<nsIContent> anchorContent =
pointToPutCaret.GetContainerAs<nsIContent>();
if (MOZ_LIKELY(anchorContent) &&
MOZ_LIKELY(HTMLEditUtils::IsSimplyEditableNode(*anchorContent)) &&
// FIXME: Perhaps, this should use `HTMLEditor::IsEmptyNode` instead.
!anchorContent->Length()) {
AutoTrackDOMPoint trackPoint(RangeUpdaterRef(), &pointToPutCaret);
nsresult rv =
MOZ_KnownLive(AsHTMLEditor())
->RemoveEmptyInclusiveAncestorInlineElements(*anchorContent);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::RemoveEmptyInclusiveAncestorInlineElements() "
"failed");
return Err(rv);
}
}
}
return CaretPoint(std::move(pointToPutCaret));
}
already_AddRefed<Element> EditorBase::CreateHTMLContent(
const nsAtom* aTag) const {
MOZ_ASSERT(aTag);
RefPtr<Document> document = GetDocument();
if (NS_WARN_IF(!document)) {
return nullptr;
}
// XXX Wallpaper over editor bug (editor tries to create elements with an
// empty nodename).
if (aTag == nsGkAtoms::_empty) {
NS_ERROR(
"Don't pass an empty tag to EditorBase::CreateHTMLContent, "
"check caller.");
return nullptr;
}
return document->CreateElem(nsDependentAtomString(aTag), nullptr,
kNameSpaceID_XHTML);
}
already_AddRefed<nsTextNode> EditorBase::CreateTextNode(
const nsAString& aData) const {
MOZ_ASSERT(IsEditActionDataAvailable());
Document* document = GetDocument();
if (NS_WARN_IF(!document)) {
return nullptr;
}
RefPtr<nsTextNode> text = document->CreateEmptyTextNode();
text->MarkAsMaybeModifiedFrequently();
if (IsPasswordEditor()) {
text->MarkAsMaybeMasked();
}
// Don't notify; this node is still being created.
DebugOnly<nsresult> rvIgnored = text->SetText(aData, false);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"Text::SetText() failed, but ignored");
return text.forget();
}
NS_IMETHODIMP EditorBase::SetAttributeOrEquivalent(Element* aElement,
const nsAString& aAttribute,
const nsAString& aValue,
bool aSuppressTransaction) {
if (NS_WARN_IF(!aElement)) {
return NS_ERROR_NULL_POINTER;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eSetAttribute);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
RefPtr<nsAtom> attribute = NS_Atomize(aAttribute);
rv = SetAttributeOrEquivalent(aElement, attribute, aValue,
aSuppressTransaction);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::SetAttributeOrEquivalent() failed");
return EditorBase::ToGenericNSResult(rv);
}
NS_IMETHODIMP EditorBase::RemoveAttributeOrEquivalent(
Element* aElement, const nsAString& aAttribute, bool aSuppressTransaction) {
if (NS_WARN_IF(!aElement)) {
return NS_ERROR_NULL_POINTER;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eRemoveAttribute);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
RefPtr<nsAtom> attribute = NS_Atomize(aAttribute);
rv = RemoveAttributeOrEquivalent(aElement, attribute, aSuppressTransaction);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::RemoveAttributeOrEquivalent() failed");
return EditorBase::ToGenericNSResult(rv);
}
void EditorBase::HandleKeyPressEventInReadOnlyMode(
WidgetKeyboardEvent& aKeyboardEvent) const {
MOZ_ASSERT(IsReadonly());
MOZ_ASSERT(aKeyboardEvent.mMessage == eKeyPress);
switch (aKeyboardEvent.mKeyCode) {
case NS_VK_BACK:
// If it's a `Backspace` key, let's consume it because it may be mapped
// to "Back" of the history navigation. So, it's possible that user
// tries to delete a character with `Backspace` even in the read-only
// editor.
aKeyboardEvent.PreventDefault();
break;
}
// XXX How about space key (page up and page down in browser navigation)?
}
nsresult EditorBase::HandleKeyPressEvent(WidgetKeyboardEvent* aKeyboardEvent) {
MOZ_ASSERT(!IsReadonly());
MOZ_ASSERT(aKeyboardEvent);
MOZ_ASSERT(aKeyboardEvent->mMessage == eKeyPress);
// NOTE: When you change this method, you should also change:
// * editor/libeditor/tests/test_texteditor_keyevent_handling.html
// * editor/libeditor/tests/test_htmleditor_keyevent_handling.html
//
// And also when you add new key handling, you need to change the subclass's
// HandleKeyPressEvent()'s switch statement.
switch (aKeyboardEvent->mKeyCode) {
case NS_VK_META:
case NS_VK_WIN:
case NS_VK_SHIFT:
case NS_VK_CONTROL:
case NS_VK_ALT:
MOZ_ASSERT_UNREACHABLE(
"eKeyPress event shouldn't be fired for modifier keys");
return NS_ERROR_UNEXPECTED;
case NS_VK_BACK: {
if (aKeyboardEvent->IsControl() || aKeyboardEvent->IsAlt() ||
aKeyboardEvent->IsMeta() || aKeyboardEvent->IsOS()) {
return NS_OK;
}
DebugOnly<nsresult> rvIgnored =
DeleteSelectionAsAction(nsIEditor::ePrevious, nsIEditor::eStrip);
aKeyboardEvent->PreventDefault();
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::DeleteSelectionAsAction() failed, but ignored");
return NS_OK;
}
case NS_VK_DELETE: {
// on certain platforms (such as windows) the shift key
// modifies what delete does (cmd_cut in this case).
// bailing here to allow the keybindings to do the cut.
if (aKeyboardEvent->IsShift() || aKeyboardEvent->IsControl() ||
aKeyboardEvent->IsAlt() || aKeyboardEvent->IsMeta() ||
aKeyboardEvent->IsOS()) {
return NS_OK;
}
DebugOnly<nsresult> rvIgnored =
DeleteSelectionAsAction(nsIEditor::eNext, nsIEditor::eStrip);
aKeyboardEvent->PreventDefault();
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::DeleteSelectionAsAction() failed, but ignored");
return NS_OK;
}
}
return NS_OK;
}
nsresult EditorBase::OnInputText(const nsAString& aStringToInsert) {
AutoEditActionDataSetter editActionData(*this, EditAction::eInsertText);
MOZ_ASSERT(!aStringToInsert.IsVoid());
editActionData.SetData(aStringToInsert);
// FYI: For conforming to current UI Events spec, we should dispatch
// "beforeinput" event before "keypress" event, but here is in a
// "keypress" event listener. However, the other browsers dispatch
// "beforeinput" event after "keypress" event. Therefore, it makes
// sense to follow the other browsers. Spec issue:
// https://github.com/w3c/uievents/issues/220
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoPlaceholderBatch treatAsOneTransaction(*this, *nsGkAtoms::TypingTxnName,
ScrollSelectionIntoView::Yes,
__FUNCTION__);
rv = InsertTextAsSubAction(aStringToInsert, SelectionHandling::Delete);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAsSubAction() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::ReplaceTextAsAction(
const nsAString& aString, nsRange* aReplaceRange,
AllowBeforeInputEventCancelable aAllowBeforeInputEventCancelable,
nsIPrincipal* aPrincipal) {
MOZ_ASSERT(aString.FindChar(nsCRT::CR) == kNotFound);
MOZ_ASSERT_IF(!aReplaceRange, IsTextEditor());
AutoEditActionDataSetter editActionData(*this, EditAction::eReplaceText,
aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aAllowBeforeInputEventCancelable == AllowBeforeInputEventCancelable::No) {
editActionData.MakeBeforeInputEventNonCancelable();
}
if (IsTextEditor()) {
editActionData.SetData(aString);
} else {
editActionData.InitializeDataTransfer(aString);
RefPtr<StaticRange> targetRange;
if (aReplaceRange) {
// Compute offset of the range before dispatching `beforeinput` event
// because it may be referred after the DOM tree is changed and the
// range may have not computed the offset yet.
targetRange = StaticRange::Create(
aReplaceRange->GetStartContainer(), aReplaceRange->StartOffset(),
aReplaceRange->GetEndContainer(), aReplaceRange->EndOffset(),
IgnoreErrors());
NS_WARNING_ASSERTION(targetRange && targetRange->IsPositioned(),
"StaticRange::Create() failed");
} else {
Element* editingHost = AsHTMLEditor()->ComputeEditingHost();
NS_WARNING_ASSERTION(editingHost,
"No active editing host, no target ranges");
if (editingHost) {
targetRange = StaticRange::Create(
editingHost, 0, editingHost, editingHost->Length(), IgnoreErrors());
NS_WARNING_ASSERTION(targetRange && targetRange->IsPositioned(),
"StaticRange::Create() failed");
}
}
if (targetRange && targetRange->IsPositioned()) {
editActionData.AppendTargetRange(*targetRange);
}
}
nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
// This should emulates inserting text for better undo/redo behavior.
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eInsertText, nsIEditor::eNext, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return EditorBase::ToGenericNSResult(ignoredError.StealNSResult());
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"TextEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
if (!aReplaceRange) {
// Use fast path if we're `TextEditor` because it may be in a hot path.
if (IsTextEditor()) {
nsresult rv = MOZ_KnownLive(AsTextEditor())->SetTextAsSubAction(aString);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"TextEditor::SetTextAsSubAction() failed");
return EditorBase::ToGenericNSResult(rv);
}
MOZ_ASSERT_UNREACHABLE("Setting value of `HTMLEditor` isn't supported");
return EditorBase::ToGenericNSResult(NS_ERROR_FAILURE);
}
if (aString.IsEmpty() && aReplaceRange->Collapsed()) {
NS_WARNING("Setting value was empty and replaced range was empty");
return NS_OK;
}
// Note that do not notify selectionchange caused by selecting all text
// because it's preparation of our delete implementation so web apps
// shouldn't receive such selectionchange before the first mutation.
AutoUpdateViewBatch preventSelectionChangeEvent(*this, __FUNCTION__);
// Select the range but as far as possible, we should not create new range
// even if it's part of special Selection.
ErrorResult error;
SelectionRef().RemoveAllRanges(error);
if (error.Failed()) {
NS_WARNING("Selection::RemoveAllRanges() failed");
return error.StealNSResult();
}
SelectionRef().AddRangeAndSelectFramesAndNotifyListeners(*aReplaceRange,
error);
if (error.Failed()) {
NS_WARNING("Selection::AddRangeAndSelectFramesAndNotifyListeners() failed");
return error.StealNSResult();
}
rv = ReplaceSelectionAsSubAction(aString);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::ReplaceSelectionAsSubAction() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::ReplaceSelectionAsSubAction(const nsAString& aString) {
if (aString.IsEmpty()) {
nsresult rv = DeleteSelectionAsSubAction(
nsIEditor::eNone,
IsTextEditor() ? nsIEditor::eNoStrip : nsIEditor::eStrip);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::DeleteSelectionAsSubAction(eNone) failed");
return rv;
}
nsresult rv = InsertTextAsSubAction(aString, SelectionHandling::Delete);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAsSubAction() failed");
return rv;
}
nsresult EditorBase::HandleInlineSpellCheck(
const EditorDOMPoint& aPreviouslySelectedStart,
const AbstractRange* aRange) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (!mInlineSpellChecker) {
return NS_OK;
}
nsresult rv = mInlineSpellChecker->SpellCheckAfterEditorChange(
GetTopLevelEditSubAction(), SelectionRef(),
aPreviouslySelectedStart.GetContainer(),
aPreviouslySelectedStart.Offset(),
aRange ? aRange->GetStartContainer() : nullptr,
aRange ? aRange->StartOffset() : 0,
aRange ? aRange->GetEndContainer() : nullptr,
aRange ? aRange->EndOffset() : 0);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"mozInlineSpellChecker::SpellCheckAfterEditorChange() failed");
return rv;
}
Element* EditorBase::FindSelectionRoot(const nsINode& aNode) const {
return GetRoot();
}
void EditorBase::InitializeSelectionAncestorLimit(
nsIContent& aAncestorLimit) const {
MOZ_ASSERT(IsEditActionDataAvailable());
SelectionRef().SetAncestorLimiter(&aAncestorLimit);
}
nsresult EditorBase::InitializeSelection(
const nsINode& aOriginalEventTargetNode) {
MOZ_ASSERT(IsEditActionDataAvailable());
nsCOMPtr<nsIContent> selectionRootContent =
FindSelectionRoot(aOriginalEventTargetNode);
if (!selectionRootContent) {
return NS_OK;
}
nsCOMPtr<nsISelectionController> selectionController =
GetSelectionController();
if (NS_WARN_IF(!selectionController)) {
return NS_ERROR_FAILURE;
}
// Init the caret
RefPtr<nsCaret> caret = GetCaret();
if (NS_WARN_IF(!caret)) {
return NS_ERROR_FAILURE;
}
caret->SetSelection(&SelectionRef());
DebugOnly<nsresult> rvIgnored =
selectionController->SetCaretReadOnly(IsReadonly());
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsISelectionController::SetCaretReadOnly() failed, but ignored");
rvIgnored = selectionController->SetCaretEnabled(true);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsISelectionController::SetCaretEnabled() failed, but ignored");
// NOTE(emilio): It's important for this call to be after
// SetCaretEnabled(true), since that would override mIgnoreUserModify to true.
//
// Also, make sure to always ignore it for designMode, since that effectively
// overrides everything and we allow to edit stuff with
// contenteditable="false" subtrees in such a document.
caret->SetIgnoreUserModify(aOriginalEventTargetNode.IsInDesignMode());
// Init selection
rvIgnored =
selectionController->SetSelectionFlags(nsISelectionDisplay::DISPLAY_ALL);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsISelectionController::SetSelectionFlags() failed, but ignored");
selectionController->SelectionWillTakeFocus();
// If the computed selection root isn't root content, we should set it
// as selection ancestor limit. However, if that is root element, it means
// there is not limitation of the selection, then, we must set nullptr.
// NOTE: If we set a root element to the ancestor limit, some selection
// methods don't work fine.
if (selectionRootContent->GetParent()) {
InitializeSelectionAncestorLimit(*selectionRootContent);
} else {
SelectionRef().SetAncestorLimiter(nullptr);
}
// If there is composition when this is called, we may need to restore IME
// selection because if the editor is reframed, this already forgot IME
// selection and the transaction.
if (mComposition && mComposition->IsMovingToNewTextNode()) {
// We need to look for the new text node from current selection.
// XXX If selection is changed during reframe, this doesn't work well!
const nsRange* firstRange = SelectionRef().GetRangeAt(0);
if (NS_WARN_IF(!firstRange)) {
return NS_ERROR_FAILURE;
}
EditorRawDOMPoint atStartOfFirstRange(firstRange->StartRef());
EditorRawDOMPoint betterInsertionPoint =
FindBetterInsertionPoint(atStartOfFirstRange);
RefPtr<Text> textNode = betterInsertionPoint.GetContainerAs<Text>();
MOZ_ASSERT(textNode,
"There must be text node if composition string is not empty");
if (textNode) {
MOZ_ASSERT(textNode->Length() >= mComposition->XPEndOffsetInTextNode(),
"The text node must be different from the old text node");
RefPtr<TextRangeArray> ranges = mComposition->GetRanges();
DebugOnly<nsresult> rvIgnored = CompositionTransaction::SetIMESelection(
*this, textNode, mComposition->XPOffsetInTextNode(),
mComposition->XPLengthInTextNode(), ranges);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"CompositionTransaction::SetIMESelection() failed, but ignored");
mComposition->OnUpdateCompositionInEditor(
mComposition->String(), *textNode,
mComposition->XPOffsetInTextNode());
}
}
return NS_OK;
}
nsresult EditorBase::FinalizeSelection() {
nsCOMPtr<nsISelectionController> selectionController =
GetSelectionController();
if (NS_WARN_IF(!selectionController)) {
return NS_ERROR_FAILURE;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
SelectionRef().SetAncestorLimiter(nullptr);
if (NS_WARN_IF(!GetPresShell())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (RefPtr<nsCaret> caret = GetCaret()) {
caret->SetIgnoreUserModify(true);
DebugOnly<nsresult> rvIgnored = selectionController->SetCaretEnabled(false);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsISelectionController::SetCaretEnabled(false) failed, but ignored");
}
RefPtr<nsFocusManager> focusManager = nsFocusManager::GetFocusManager();
if (NS_WARN_IF(!focusManager)) {
return NS_ERROR_NOT_INITIALIZED;
}
// TODO: Running script from here makes harder to handle blur events. We
// should do this asynchronously.
focusManager->UpdateCaretForCaretBrowsingMode();
if (nsCOMPtr<nsINode> node = do_QueryInterface(GetDOMEventTarget())) {
if (node->OwnerDoc()->GetUnretargetedFocusedContent() != node) {
selectionController->SelectionWillLoseFocus();
} else {
// We leave this selection as the focused one. When the focus returns, it
// either returns to us (nothing to do), or it returns to something else,
// and nsDocumentViewerFocusListener::HandleEvent fixes it up.
}
}
return NS_OK;
}
Element* EditorBase::GetExposedRoot() const {
Element* rootElement = GetRoot();
if (!rootElement || !rootElement->IsInNativeAnonymousSubtree()) {
return rootElement;
}
return Element::FromNodeOrNull(
rootElement->GetClosestNativeAnonymousSubtreeRootParentOrHost());
}
nsresult EditorBase::DetermineCurrentDirection() {
// Get the current root direction from its frame
Element* rootElement = GetExposedRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_FAILURE;
}
// If we don't have an explicit direction, determine our direction
// from the content's direction
if (!IsRightToLeft() && !IsLeftToRight()) {
nsIFrame* frameForRootElement = rootElement->GetPrimaryFrame();
if (NS_WARN_IF(!frameForRootElement)) {
return NS_ERROR_FAILURE;
}
// Set the flag here, to enable us to use the same code path below.
// It will be flipped before returning from the function.
if (frameForRootElement->StyleVisibility()->mDirection ==
StyleDirection::Rtl) {
mFlags |= nsIEditor::eEditorRightToLeft;
} else {
mFlags |= nsIEditor::eEditorLeftToRight;
}
}
return NS_OK;
}
nsresult EditorBase::ToggleTextDirectionAsAction(nsIPrincipal* aPrincipal) {
AutoEditActionDataSetter editActionData(*this, EditAction::eSetTextDirection,
aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = DetermineCurrentDirection();
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DetermineCurrentDirection() failed");
return EditorBase::ToGenericNSResult(rv);
}
MOZ_ASSERT(IsRightToLeft() || IsLeftToRight());
// Note that we need to consider new direction before dispatching
// "beforeinput" event since "beforeinput" event listener may change it
// but not canceled.
TextDirection newDirection =
IsRightToLeft() ? TextDirection::eLTR : TextDirection::eRTL;
editActionData.SetData(IsRightToLeft() ? u"ltr"_ns : u"rtl"_ns);
// FYI: Oddly, Chrome does not dispatch beforeinput event in this case but
// dispatches input event.
rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
rv = SetTextDirectionTo(newDirection);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::SetTextDirectionTo() failed");
return EditorBase::ToGenericNSResult(rv);
}
editActionData.MarkAsHandled();
// XXX When we don't change the text direction, do we really need to
// dispatch input event?
DispatchInputEvent();
return NS_OK;
}
void EditorBase::SwitchTextDirectionTo(TextDirection aTextDirection) {
MOZ_ASSERT(aTextDirection == TextDirection::eLTR ||
aTextDirection == TextDirection::eRTL);
AutoEditActionDataSetter editActionData(*this, EditAction::eSetTextDirection);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return;
}
nsresult rv = DetermineCurrentDirection();
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
editActionData.SetData(aTextDirection == TextDirection::eLTR ? u"ltr"_ns
: u"rtl"_ns);
// FYI: Oddly, Chrome does not dispatch beforeinput event in this case but
// dispatches input event.
rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent() failed");
return;
}
if ((aTextDirection == TextDirection::eLTR && IsRightToLeft()) ||
(aTextDirection == TextDirection::eRTL && IsLeftToRight())) {
// Do it only when the direction is still different from the original
// new direction. Note that "beforeinput" event listener may have already
// changed the direction here, but they may not cancel the event.
nsresult rv = SetTextDirectionTo(aTextDirection);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::SetTextDirectionTo() failed");
return;
}
}
editActionData.MarkAsHandled();
// XXX When we don't change the text direction, do we really need to
// dispatch input event?
DispatchInputEvent();
}
nsresult EditorBase::SetTextDirectionTo(TextDirection aTextDirection) {
Element* rootElement = GetExposedRoot();
if (aTextDirection == TextDirection::eLTR) {
NS_ASSERTION(!IsLeftToRight(), "Unexpected mutually exclusive flag");
mFlags &= ~nsIEditor::eEditorRightToLeft;
mFlags |= nsIEditor::eEditorLeftToRight;
nsresult rv = rootElement->SetAttr(kNameSpaceID_None, nsGkAtoms::dir,
u"ltr"_ns, true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Element::SetAttr(nsGkAtoms::dir, ltr) failed");
return rv;
}
if (aTextDirection == TextDirection::eRTL) {
NS_ASSERTION(!IsRightToLeft(), "Unexpected mutually exclusive flag");
mFlags |= nsIEditor::eEditorRightToLeft;
mFlags &= ~nsIEditor::eEditorLeftToRight;
nsresult rv = rootElement->SetAttr(kNameSpaceID_None, nsGkAtoms::dir,
u"rtl"_ns, true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Element::SetAttr(nsGkAtoms::dir, rtl) failed");
return rv;
}
return NS_OK;
}
Element* EditorBase::GetFocusedElement() const {
EventTarget* eventTarget = GetDOMEventTarget();
if (!eventTarget) {
return nullptr;
}
nsFocusManager* focusManager = nsFocusManager::GetFocusManager();
if (NS_WARN_IF(!focusManager)) {
return nullptr;
}
Element* focusedElement = focusManager->GetFocusedElement();
MOZ_ASSERT((focusedElement == eventTarget) ==
SameCOMIdentity(focusedElement, eventTarget));
return (focusedElement == eventTarget) ? focusedElement : nullptr;
}
bool EditorBase::IsActiveInDOMWindow() const {
EventTarget* piTarget = GetDOMEventTarget();
if (!piTarget) {
return false;
}
nsFocusManager* focusManager = nsFocusManager::GetFocusManager();
if (NS_WARN_IF(!focusManager)) {
return false; // Do we need to check the singleton instance??
}
Document* document = GetDocument();
if (NS_WARN_IF(!document)) {
return false;
}
nsPIDOMWindowOuter* ourWindow = document->GetWindow();
nsCOMPtr<nsPIDOMWindowOuter> win;
nsIContent* content = nsFocusManager::GetFocusedDescendant(
ourWindow, nsFocusManager::eOnlyCurrentWindow, getter_AddRefs(win));
return SameCOMIdentity(content, piTarget);
}
bool EditorBase::IsAcceptableInputEvent(WidgetGUIEvent* aGUIEvent) const {
// If the event is trusted, the event should always cause input.
if (NS_WARN_IF(!aGUIEvent)) {
return false;
}
// If this is dispatched by using cordinates but this editor doesn't have
// focus, we shouldn't handle it.
if (aGUIEvent->IsUsingCoordinates() && !GetFocusedElement()) {
return false;
}
// If a composition event isn't dispatched via widget, we need to ignore them
// since they cannot be managed by TextComposition. E.g., the event was
// created by chrome JS.
// Note that if we allow to handle such events, editor may be confused by
// strange event order.
bool needsWidget = false;
switch (aGUIEvent->mMessage) {
case eUnidentifiedEvent:
// If events are not created with proper event interface, their message
// are initialized with eUnidentifiedEvent. Let's ignore such event.
return false;
case eCompositionStart:
case eCompositionEnd:
case eCompositionUpdate:
case eCompositionChange:
case eCompositionCommitAsIs:
// Don't allow composition events whose internal event are not
// WidgetCompositionEvent.
if (!aGUIEvent->AsCompositionEvent()) {
return false;
}
needsWidget = true;
break;
default:
break;
}
if (needsWidget && !aGUIEvent->mWidget) {
return false;
}
// Accept all trusted events.
if (aGUIEvent->IsTrusted()) {
return true;
}
// Ignore untrusted mouse event.
// XXX Why are we handling other untrusted input events?
if (aGUIEvent->AsMouseEventBase()) {
return false;
}
// Otherwise, we shouldn't handle any input events when we're not an active
// element of the DOM window.
return IsActiveInDOMWindow();
}
nsresult EditorBase::FlushPendingSpellCheck() {
// If the spell check skip flag is still enabled from creation time,
// disable it because focused editors are allowed to spell check.
if (!ShouldSkipSpellCheck()) {
return NS_OK;
}
MOZ_ASSERT(!IsHTMLEditor(), "HTMLEditor should not has pending spell checks");
nsresult rv = RemoveFlags(nsIEditor::eEditorSkipSpellCheck);
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::RemoveFlags(nsIEditor::eEditorSkipSpellCheck) failed");
return rv;
}
bool EditorBase::CanKeepHandlingFocusEvent(
const nsINode& aOriginalEventTargetNode) const {
if (MOZ_UNLIKELY(!IsListeningToEvents() || Destroyed())) {
return false;
}
nsFocusManager* focusManager = nsFocusManager::GetFocusManager();
if (MOZ_UNLIKELY(!focusManager)) {
return false;
}
// If the event target is document mode, we only need to handle the focus
// event when the document is still in designMode. Otherwise, the
// mode has been disabled by somebody while we're handling the focus event.
if (aOriginalEventTargetNode.IsDocument()) {
return IsHTMLEditor() && aOriginalEventTargetNode.IsInDesignMode();
}
MOZ_ASSERT(aOriginalEventTargetNode.IsContent());
// If nobody has focus, the focus event target has been blurred by somebody
// else. So the editor shouldn't initialize itself to start to handle
// anything.
if (!focusManager->GetFocusedElement()) {
return false;
}
const nsIContent* exposedTargetContent =
aOriginalEventTargetNode.AsContent()
->FindFirstNonChromeOnlyAccessContent();
const nsIContent* exposedFocusedContent =
focusManager->GetFocusedElement()->FindFirstNonChromeOnlyAccessContent();
return exposedTargetContent && exposedFocusedContent &&
exposedTargetContent == exposedFocusedContent;
}
nsresult EditorBase::OnFocus(const nsINode& aOriginalEventTargetNode) {
MOZ_ASSERT(IsEditActionDataAvailable());
InitializeSelection(aOriginalEventTargetNode);
mSpellCheckerDictionaryUpdated = false;
if (mInlineSpellChecker && CanEnableSpellCheck()) {
DebugOnly<nsresult> rvIgnored =
mInlineSpellChecker->UpdateCurrentDictionary();
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"mozInlineSpellCHecker::UpdateCurrentDictionary() failed, but ignored");
mSpellCheckerDictionaryUpdated = true;
}
// XXX Why don't we stop handling focus with the spell checker immediately
// after calling InitializeSelection?
if (MOZ_UNLIKELY(!CanKeepHandlingFocusEvent(aOriginalEventTargetNode))) {
return NS_ERROR_EDITOR_DESTROYED;
}
const RefPtr<Element> focusedElement = GetFocusedElement();
RefPtr<nsPresContext> presContext =
focusedElement ? focusedElement->GetPresContext(
Element::PresContextFor::eForComposedDoc)
: GetPresContext();
if (NS_WARN_IF(!presContext)) {
return NS_ERROR_FAILURE;
}
IMEStateManager::OnFocusInEditor(*presContext, focusedElement, *this);
return NS_OK;
}
void EditorBase::HideCaret(bool aHide) {
if (mHidingCaret == aHide) {
return;
}
RefPtr<nsCaret> caret = GetCaret();
if (NS_WARN_IF(!caret)) {
return;
}
mHidingCaret = aHide;
if (aHide) {
caret->AddForceHide();
} else {
caret->RemoveForceHide();
}
}
NS_IMETHODIMP EditorBase::Unmask(uint32_t aStart, int64_t aEnd,
uint32_t aTimeout, uint8_t aArgc) {
if (NS_WARN_IF(!IsPasswordEditor())) {
return NS_ERROR_NOT_AVAILABLE;
}
if (NS_WARN_IF(aArgc >= 1 && aStart == UINT32_MAX) ||
NS_WARN_IF(aArgc >= 2 && aEnd == 0) ||
NS_WARN_IF(aArgc >= 2 && aEnd > 0 && aStart >= aEnd)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eHidePassword);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
uint32_t start = aArgc < 1 ? 0 : aStart;
uint32_t length = aArgc < 2 || aEnd < 0 ? UINT32_MAX : aEnd - start;
uint32_t timeout = aArgc < 3 ? 0 : aTimeout;
nsresult rv = MOZ_KnownLive(AsTextEditor())
->SetUnmaskRangeAndNotify(start, length, timeout);
if (NS_FAILED(rv)) {
NS_WARNING("TextEditor::SetUnmaskRangeAndNotify() failed");
return EditorBase::ToGenericNSResult(rv);
}
// Flush pending layout right now since the caller may access us before
// doing it.
if (RefPtr<PresShell> presShell = GetPresShell()) {
presShell->FlushPendingNotifications(FlushType::Layout);
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::Mask() {
if (NS_WARN_IF(!IsPasswordEditor())) {
return NS_ERROR_NOT_AVAILABLE;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eHidePassword);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = MOZ_KnownLive(AsTextEditor())->MaskAllCharactersAndNotify();
if (NS_FAILED(rv)) {
NS_WARNING("TextEditor::MaskAllCharactersAndNotify() failed");
return EditorBase::ToGenericNSResult(rv);
}
// Flush pending layout right now since the caller may access us before
// doing it.
if (RefPtr<PresShell> presShell = GetPresShell()) {
presShell->FlushPendingNotifications(FlushType::Layout);
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetUnmaskedStart(uint32_t* aResult) {
if (NS_WARN_IF(!IsPasswordEditor())) {
*aResult = 0;
return NS_ERROR_NOT_AVAILABLE;
}
*aResult =
AsTextEditor()->IsAllMasked() ? 0 : AsTextEditor()->UnmaskedStart();
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetUnmaskedEnd(uint32_t* aResult) {
if (NS_WARN_IF(!IsPasswordEditor())) {
*aResult = 0;
return NS_ERROR_NOT_AVAILABLE;
}
*aResult = AsTextEditor()->IsAllMasked() ? 0 : AsTextEditor()->UnmaskedEnd();
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetAutoMaskingEnabled(bool* aResult) {
if (NS_WARN_IF(!IsPasswordEditor())) {
*aResult = false;
return NS_ERROR_NOT_AVAILABLE;
}
*aResult = AsTextEditor()->IsMaskingPassword();
return NS_OK;
}
NS_IMETHODIMP EditorBase::GetPasswordMask(nsAString& aPasswordMask) {
aPasswordMask.Assign(TextEditor::PasswordMask());
return NS_OK;
}
template <typename PT, typename CT>
EditorBase::AutoCaretBidiLevelManager::AutoCaretBidiLevelManager(
const EditorBase& aEditorBase, nsIEditor::EDirection aDirectionAndAmount,
const EditorDOMPointBase<PT, CT>& aPointAtCaret) {
MOZ_ASSERT(aEditorBase.IsEditActionDataAvailable());
nsPresContext* presContext = aEditorBase.GetPresContext();
if (NS_WARN_IF(!presContext)) {
mFailed = true;
return;
}
if (!presContext->BidiEnabled()) {
return; // Perform the deletion
}
if (!aPointAtCaret.IsInContentNode()) {
mFailed = true;
return;
}
// XXX Not sure whether this requires strong reference here.
RefPtr<nsFrameSelection> frameSelection =
aEditorBase.SelectionRef().GetFrameSelection();
if (NS_WARN_IF(!frameSelection)) {
mFailed = true;
return;
}
nsPrevNextBidiLevels levels = frameSelection->GetPrevNextBidiLevels(
aPointAtCaret.template ContainerAs<nsIContent>(), aPointAtCaret.Offset(),
true);
mozilla::intl::BidiEmbeddingLevel levelBefore = levels.mLevelBefore;
mozilla::intl::BidiEmbeddingLevel levelAfter = levels.mLevelAfter;
mozilla::intl::BidiEmbeddingLevel currentCaretLevel =
frameSelection->GetCaretBidiLevel();
mozilla::intl::BidiEmbeddingLevel levelOfDeletion;
levelOfDeletion = (nsIEditor::eNext == aDirectionAndAmount ||
nsIEditor::eNextWord == aDirectionAndAmount)
? levelAfter
: levelBefore;
if (currentCaretLevel == levelOfDeletion) {
return; // Perform the deletion
}
// Set the bidi level of the caret to that of the
// character that will be (or would have been) deleted
mNewCaretBidiLevel = Some(levelOfDeletion);
mCanceled =
!StaticPrefs::bidi_edit_delete_immediately() && levelBefore != levelAfter;
}
void EditorBase::AutoCaretBidiLevelManager::MaybeUpdateCaretBidiLevel(
const EditorBase& aEditorBase) const {
MOZ_ASSERT(!mFailed);
if (mNewCaretBidiLevel.isNothing()) {
return;
}
RefPtr<nsFrameSelection> frameSelection =
aEditorBase.SelectionRef().GetFrameSelection();
MOZ_ASSERT(frameSelection);
frameSelection->SetCaretBidiLevelAndMaybeSchedulePaint(
mNewCaretBidiLevel.value());
}
void EditorBase::UndefineCaretBidiLevel() const {
MOZ_ASSERT(IsEditActionDataAvailable());
/**
* After inserting text the caret Bidi level must be set to the level of the
* inserted text.This is difficult, because we cannot know what the level is
* until after the Bidi algorithm is applied to the whole paragraph.
*
* So we set the caret Bidi level to UNDEFINED here, and the caret code will
* set it correctly later
*/
nsFrameSelection* frameSelection = SelectionRef().GetFrameSelection();
if (frameSelection) {
frameSelection->UndefineCaretBidiLevel();
}
}
NS_IMETHODIMP EditorBase::GetTextLength(uint32_t* aCount) {
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP EditorBase::GetWrapWidth(int32_t* aWrapColumn) {
if (NS_WARN_IF(!aWrapColumn)) {
return NS_ERROR_INVALID_ARG;
}
*aWrapColumn = WrapWidth();
return NS_OK;
}
//
// See if the style value includes this attribute, and if it does,
// cut out everything from the attribute to the next semicolon.
//
static void CutStyle(const char* stylename, nsString& styleValue) {
// Find the current wrapping type:
int32_t styleStart = styleValue.LowerCaseFindASCII(stylename);
if (styleStart >= 0) {
int32_t styleEnd = styleValue.Find(u";", styleStart);
if (styleEnd > styleStart) {
styleValue.Cut(styleStart, styleEnd - styleStart + 1);
} else {
styleValue.Cut(styleStart, styleValue.Length() - styleStart);
}
}
}
NS_IMETHODIMP EditorBase::SetWrapWidth(int32_t aWrapColumn) {
AutoEditActionDataSetter editActionData(*this, EditAction::eSetWrapWidth);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
SetWrapColumn(aWrapColumn);
// Make sure we're a plaintext editor, otherwise we shouldn't
// do the rest of this.
if (!IsInPlaintextMode()) {
return NS_OK;
}
// Ought to set a style sheet here ...
// Probably should keep around an mPlaintextStyleSheet for this purpose.
RefPtr<Element> rootElement = GetRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_NOT_INITIALIZED;
}
// Get the current style for this root element:
nsAutoString styleValue;
rootElement->GetAttr(kNameSpaceID_None, nsGkAtoms::style, styleValue);
// We'll replace styles for these values:
CutStyle("white-space", styleValue);
CutStyle("width", styleValue);
CutStyle("font-family", styleValue);
// If we have other style left, trim off any existing semicolons
// or white-space, then add a known semicolon-space:
if (!styleValue.IsEmpty()) {
styleValue.Trim("; \t", false, true);
styleValue.AppendLiteral("; ");
}
// Make sure we have fixed-width font. This should be done for us,
// but it isn't, see bug 22502, so we have to add "font: -moz-fixed;".
// Only do this if we're wrapping.
if (IsWrapHackEnabled() && aWrapColumn >= 0) {
styleValue.AppendLiteral("font-family: -moz-fixed; ");
}
// and now we're ready to set the new white-space/wrapping style.
if (aWrapColumn > 0) {
// Wrap to a fixed column.
styleValue.AppendLiteral("white-space: pre-wrap; width: ");
styleValue.AppendInt(aWrapColumn);
styleValue.AppendLiteral("ch;");
} else if (!aWrapColumn) {
styleValue.AppendLiteral("white-space: pre-wrap;");
} else {
styleValue.AppendLiteral("white-space: pre;");
}
nsresult rv = rootElement->SetAttr(kNameSpaceID_None, nsGkAtoms::style,
styleValue, true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Element::SetAttr(nsGkAtoms::style) failed");
return rv;
}
NS_IMETHODIMP EditorBase::GetNewlineHandling(int32_t* aNewlineHandling) {
if (NS_WARN_IF(!aNewlineHandling)) {
return NS_ERROR_INVALID_ARG;
}
*aNewlineHandling = mNewlineHandling;
return NS_OK;
}
NS_IMETHODIMP EditorBase::SetNewlineHandling(int32_t aNewlineHandling) {
switch (aNewlineHandling) {
case nsIEditor::eNewlinesPasteIntact:
case nsIEditor::eNewlinesPasteToFirst:
case nsIEditor::eNewlinesReplaceWithSpaces:
case nsIEditor::eNewlinesStrip:
case nsIEditor::eNewlinesReplaceWithCommas:
case nsIEditor::eNewlinesStripSurroundingWhitespace:
mNewlineHandling = aNewlineHandling;
return NS_OK;
default:
NS_ERROR("SetNewlineHandling() is called with wrong value");
return NS_ERROR_INVALID_ARG;
}
}
bool EditorBase::IsSelectionRangeContainerNotContent() const {
MOZ_ASSERT(IsEditActionDataAvailable());
// TODO: Make all callers use !AutoRangeArray::IsInContent() instead.
const uint32_t rangeCount = SelectionRef().RangeCount();
for (const uint32_t i : IntegerRange(rangeCount)) {
MOZ_ASSERT(SelectionRef().RangeCount() == rangeCount);
const nsRange* range = SelectionRef().GetRangeAt(i);
MOZ_ASSERT(range);
if (MOZ_UNLIKELY(!range) || MOZ_UNLIKELY(!range->GetStartContainer()) ||
MOZ_UNLIKELY(!range->GetStartContainer()->IsContent()) ||
MOZ_UNLIKELY(!range->GetEndContainer()) ||
MOZ_UNLIKELY(!range->GetEndContainer()->IsContent())) {
return true;
}
}
return false;
}
NS_IMETHODIMP EditorBase::InsertText(const nsAString& aStringToInsert) {
nsresult rv = InsertTextAsAction(aStringToInsert);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAsAction() failed");
return rv;
}
nsresult EditorBase::InsertTextAsAction(const nsAString& aStringToInsert,
nsIPrincipal* aPrincipal) {
// Showing this assertion is fine if this method is called by outside via
// mutation event listener or something. Otherwise, this is called by
// wrong method.
NS_ASSERTION(!mPlaceholderBatch,
"Should be called only when this is the only edit action of the "
"operation "
"unless mutation event listener nests some operations");
AutoEditActionDataSetter editActionData(*this, EditAction::eInsertText,
aPrincipal);
// Note that we don't need to replace native line breaks with XP line breaks
// here because Chrome does not do it.
MOZ_ASSERT(!aStringToInsert.IsVoid());
editActionData.SetData(aStringToInsert);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsString stringToInsert(aStringToInsert);
if (IsTextEditor()) {
nsContentUtils::PlatformToDOMLineBreaks(stringToInsert);
}
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
rv = InsertTextAsSubAction(stringToInsert, SelectionHandling::Delete);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAsSubAction() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult EditorBase::InsertTextAsSubAction(
const nsAString& aStringToInsert, SelectionHandling aSelectionHandling) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(mPlaceholderBatch);
MOZ_ASSERT(IsHTMLEditor() ||
aStringToInsert.FindChar(nsCRT::CR) == kNotFound);
MOZ_ASSERT_IF(aSelectionHandling == SelectionHandling::Ignore, mComposition);
if (NS_WARN_IF(!mInitSucceeded)) {
return NS_ERROR_NOT_INITIALIZED;
}
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
EditSubAction editSubAction = ShouldHandleIMEComposition()
? EditSubAction::eInsertTextComingFromIME
: EditSubAction::eInsertText;
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, editSubAction, nsIEditor::eNext, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"TextEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
Result<EditActionResult, nsresult> result =
HandleInsertText(editSubAction, aStringToInsert, aSelectionHandling);
if (MOZ_UNLIKELY(result.isErr())) {
NS_WARNING("EditorBase::HandleInsertText() failed");
return result.unwrapErr();
}
return NS_OK;
}
NS_IMETHODIMP EditorBase::InsertLineBreak() { return NS_ERROR_NOT_IMPLEMENTED; }
/*****************************************************************************
* mozilla::EditorBase::AutoEditActionDataSetter
*****************************************************************************/
EditorBase::AutoEditActionDataSetter::AutoEditActionDataSetter(
const EditorBase& aEditorBase, EditAction aEditAction,
nsIPrincipal* aPrincipal /* = nullptr */)
: mEditorBase(const_cast<EditorBase&>(aEditorBase)),
mPrincipal(aPrincipal),
mParentData(aEditorBase.mEditActionData),
mData(VoidString()),
mRawEditAction(aEditAction),
mTopLevelEditSubAction(EditSubAction::eNone),
mAborted(false),
mHasTriedToDispatchBeforeInputEvent(false),
mBeforeInputEventCanceled(false),
mMakeBeforeInputEventNonCancelable(false),
mHasTriedToDispatchClipboardEvent(false),
mEditorWasDestroyedDuringHandlingEditAction(
mParentData &&
mParentData->mEditorWasDestroyedDuringHandlingEditAction),
mHandled(false) {
// If we're nested edit action, copies necessary data from the parent.
if (mParentData) {
mSelection = mParentData->mSelection;
MOZ_ASSERT(!mSelection ||
(mSelection->GetType() == SelectionType::eNormal));
// If we're not editing something, we should inherit the parent's edit
// action. This may occur if creator or its callee use public methods which
// just returns something.
if (IsEditActionInOrderToEditSomething(aEditAction)) {
mEditAction = aEditAction;
} else {
mEditAction = mParentData->mEditAction;
// If we inherit an edit action whose handler needs to dispatch a
// clipboard event, we should inherit the clipboard dispatching state
// too because this nest occurs by a clipboard event listener or
// a beforeinput/mutation event listener is important for checking
// whether we've already called `MaybeDispatchBeforeInputEvent()`
// property in some points. If the former case, not yet dispatching
// beforeinput event is okay (not fine).
mHasTriedToDispatchClipboardEvent =
mParentData->mHasTriedToDispatchClipboardEvent;
}
mTopLevelEditSubAction = mParentData->mTopLevelEditSubAction;
// Parent's mTopLevelEditSubActionData should be referred instead so that
// we don't need to set mTopLevelEditSubActionData.mSelectedRange nor
// mTopLevelEditActionData.mChangedRange here.
mDirectionOfTopLevelEditSubAction =
mParentData->mDirectionOfTopLevelEditSubAction;
} else {
mSelection = mEditorBase.GetSelection();
if (NS_WARN_IF(!mSelection)) {
return;
}
MOZ_ASSERT(mSelection->GetType() == SelectionType::eNormal);
mEditAction = aEditAction;
mDirectionOfTopLevelEditSubAction = eNone;
if (mEditorBase.IsHTMLEditor()) {
mTopLevelEditSubActionData.mSelectedRange =
mEditorBase.AsHTMLEditor()
->GetSelectedRangeItemForTopLevelEditSubAction();
mTopLevelEditSubActionData.mChangedRange =
mEditorBase.AsHTMLEditor()->GetChangedRangeForTopLevelEditSubAction();
mTopLevelEditSubActionData.mCachedPendingStyles.emplace();
}
}
mEditorBase.mEditActionData = this;
}
EditorBase::AutoEditActionDataSetter::~AutoEditActionDataSetter() {
MOZ_ASSERT(mHasCanHandleChecked);
if (!mSelection || NS_WARN_IF(mEditorBase.mEditActionData != this)) {
return;
}
mEditorBase.mEditActionData = mParentData;
MOZ_ASSERT(
!mTopLevelEditSubActionData.mSelectedRange ||
(!mTopLevelEditSubActionData.mSelectedRange->mStartContainer &&
!mTopLevelEditSubActionData.mSelectedRange->mEndContainer),
"mTopLevelEditSubActionData.mSelectedRange should've been cleared");
}
void EditorBase::AutoEditActionDataSetter::UpdateSelectionCache(
Selection& aSelection) {
MOZ_ASSERT(aSelection.GetType() == SelectionType::eNormal);
if (mSelection == &aSelection) {
return;
}
AutoEditActionDataSetter& topLevelEditActionData =
[&]() -> AutoEditActionDataSetter& {
for (AutoEditActionDataSetter* editActionData = this;;
editActionData = editActionData->mParentData) {
if (!editActionData->mParentData) {
return *editActionData;
}
}
MOZ_ASSERT_UNREACHABLE("You do something wrong");
}();
// Keep grabbing the old selection in the top level edit action data until the
// all owners end handling it.
if (mSelection) {
topLevelEditActionData.mRetiredSelections.AppendElement(*mSelection);
}
// If the old selection is in batch, we should end the batch which
// `EditorBase::BeginUpdateViewBatch` started.
if (mEditorBase.mUpdateCount && mSelection) {
mSelection->EndBatchChanges(__FUNCTION__);
}
Selection* previousSelection = mSelection;
mSelection = &aSelection;
for (AutoEditActionDataSetter* parentActionData = mParentData;
parentActionData; parentActionData = parentActionData->mParentData) {
if (!parentActionData->mSelection) {
continue;
}
// Skip scanning mRetiredSelections if we've already handled the selection
// previous time.
if (parentActionData->mSelection != previousSelection) {
if (!topLevelEditActionData.mRetiredSelections.Contains(
OwningNonNull<Selection>(*parentActionData->mSelection))) {
topLevelEditActionData.mRetiredSelections.AppendElement(
*parentActionData->mSelection);
}
previousSelection = parentActionData->mSelection;
}
parentActionData->mSelection = &aSelection;
}
// Restart the batching in the new selection.
if (mEditorBase.mUpdateCount) {
aSelection.StartBatchChanges(__FUNCTION__);
}
}
void EditorBase::AutoEditActionDataSetter::SetColorData(
const nsAString& aData) {
MOZ_ASSERT(!HasTriedToDispatchBeforeInputEvent(),
"It's too late to set data since this may have already dispatched "
"a beforeinput event");
if (aData.IsEmpty()) {
// When removing color/background-color, let's use empty string.
mData.Truncate();
MOZ_ASSERT(!mData.IsVoid());
return;
}
DebugOnly<bool> validColorValue = HTMLEditUtils::GetNormalizedCSSColorValue(
aData, HTMLEditUtils::ZeroAlphaColor::RGBAValue, mData);
MOZ_ASSERT_IF(validColorValue, !mData.IsVoid());
}
void EditorBase::AutoEditActionDataSetter::InitializeDataTransfer(
DataTransfer* aDataTransfer) {
MOZ_ASSERT(aDataTransfer);
MOZ_ASSERT(aDataTransfer->IsReadOnly());
MOZ_ASSERT(!HasTriedToDispatchBeforeInputEvent(),
"It's too late to set dataTransfer since this may have already "
"dispatched a beforeinput event");
mDataTransfer = aDataTransfer;
}
void EditorBase::AutoEditActionDataSetter::InitializeDataTransfer(
nsITransferable* aTransferable) {
MOZ_ASSERT(aTransferable);
MOZ_ASSERT(!HasTriedToDispatchBeforeInputEvent(),
"It's too late to set dataTransfer since this may have already "
"dispatched a beforeinput event");
Document* document = mEditorBase.GetDocument();
nsIGlobalObject* scopeObject =
document ? document->GetScopeObject() : nullptr;
mDataTransfer = new DataTransfer(scopeObject, eEditorInput, aTransferable);
}
void EditorBase::AutoEditActionDataSetter::InitializeDataTransfer(
const nsAString& aString) {
MOZ_ASSERT(!HasTriedToDispatchBeforeInputEvent(),
"It's too late to set dataTransfer since this may have already "
"dispatched a beforeinput event");
Document* document = mEditorBase.GetDocument();
nsIGlobalObject* scopeObject =
document ? document->GetScopeObject() : nullptr;
mDataTransfer = new DataTransfer(scopeObject, eEditorInput, aString);
}
void EditorBase::AutoEditActionDataSetter::InitializeDataTransferWithClipboard(
SettingDataTransfer aSettingDataTransfer, int32_t aClipboardType) {
MOZ_ASSERT(!HasTriedToDispatchBeforeInputEvent(),
"It's too late to set dataTransfer since this may have already "
"dispatched a beforeinput event");
Document* document = mEditorBase.GetDocument();
nsIGlobalObject* scopeObject =
document ? document->GetScopeObject() : nullptr;
// mDataTransfer will be used for eEditorInput event, but we can keep
// using ePaste and ePasteNoFormatting here. If we need to use eEditorInput,
// we need to create eEditorInputNoFormatting or something...
mDataTransfer =
new DataTransfer(scopeObject,
aSettingDataTransfer == SettingDataTransfer::eWithFormat
? ePaste
: ePasteNoFormatting,
true /* is external */, aClipboardType);
}
void EditorBase::AutoEditActionDataSetter::AppendTargetRange(
StaticRange& aTargetRange) {
mTargetRanges.AppendElement(aTargetRange);
}
bool EditorBase::AutoEditActionDataSetter::IsBeforeInputEventEnabled() const {
if (!StaticPrefs::dom_input_events_beforeinput_enabled()) {
return false;
}
// Don't dispatch "beforeinput" event when the editor user makes us stop
// dispatching input event.
if (mEditorBase.IsSuppressingDispatchingInputEvent()) {
return false;
}
// If mPrincipal has set, it means that we're handling an edit action
// which is requested by JS. If it's not chrome script, we shouldn't
// dispatch "beforeinput" event.
if (mPrincipal && !mPrincipal->IsSystemPrincipal()) {
// But if it's content script of an addon, `execCommand` calls are a
// part of browser's default action from point of view of web apps.
// Therefore, we should dispatch `beforeinput` event.
// https://github.com/w3c/input-events/issues/91
if (!mPrincipal->GetIsAddonOrExpandedAddonPrincipal()) {
return false;
}
}
return true;
}
nsresult EditorBase::AutoEditActionDataSetter::MaybeFlushPendingNotifications()
const {
MOZ_ASSERT(CanHandle());
if (!MayEditActionRequireLayout(mRawEditAction)) {
return NS_SUCCESS_DOM_NO_OPERATION;
}
OwningNonNull<EditorBase> editorBase = mEditorBase;
RefPtr<PresShell> presShell = editorBase->GetPresShell();
if (MOZ_UNLIKELY(NS_WARN_IF(!presShell))) {
return NS_ERROR_NOT_AVAILABLE;
}
presShell->FlushPendingNotifications(FlushType::Layout);
if (MOZ_UNLIKELY(NS_WARN_IF(editorBase->Destroyed()))) {
return NS_ERROR_EDITOR_DESTROYED;
}
return NS_OK;
}
nsresult EditorBase::AutoEditActionDataSetter::MaybeDispatchBeforeInputEvent(
nsIEditor::EDirection aDeleteDirectionAndAmount /* = nsIEditor::eNone */) {
MOZ_ASSERT(!HasTriedToDispatchBeforeInputEvent(),
"We've already handled beforeinput event");
MOZ_ASSERT(CanHandle());
MOZ_ASSERT_IF(IsBeforeInputEventEnabled(),
ShouldAlreadyHaveHandledBeforeInputEventDispatching());
MOZ_ASSERT_IF(!MayEditActionDeleteAroundCollapsedSelection(mEditAction),
aDeleteDirectionAndAmount == nsIEditor::eNone);
mHasTriedToDispatchBeforeInputEvent = true;
if (!IsBeforeInputEventEnabled()) {
return NS_OK;
}
// If we're called from OnCompositionEnd(), we shouldn't dispatch
// "beforeinput" event since the preceding OnCompositionChange() call has
// already dispatched "beforeinput" event for this.
if (mEditAction == EditAction::eCommitComposition ||
mEditAction == EditAction::eCancelComposition) {
return NS_OK;
}
RefPtr<Element> targetElement = mEditorBase.GetInputEventTargetElement();
if (!targetElement) {
// If selection is not in editable element and it is outside of any
// editing hosts, there may be no target element to dispatch `beforeinput`
// event. In this case, the caller shouldn't keep handling the edit
// action since web apps cannot override it with `beforeinput` event
// listener, but for backward compatibility, we should return a special
// success code instead of error.
return NS_OK;
}
OwningNonNull<EditorBase> editorBase = mEditorBase;
EditorInputType inputType = ToInputType(mEditAction);
if (editorBase->IsHTMLEditor() && mTargetRanges.IsEmpty()) {
// If the edit action will delete selected ranges, compute the range
// strictly.
if (MayEditActionDeleteAroundCollapsedSelection(mEditAction) ||
(!editorBase->SelectionRef().IsCollapsed() &&
MayEditActionDeleteSelection(mEditAction))) {
if (!editorBase
->FlushPendingNotificationsIfToHandleDeletionWithFrameSelection(
aDeleteDirectionAndAmount)) {
NS_WARNING(
"Flusing pending notifications caused destroying the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
AutoRangeArray rangesToDelete(editorBase->SelectionRef());
if (!rangesToDelete.Ranges().IsEmpty()) {
nsresult rv = MOZ_KnownLive(editorBase->AsHTMLEditor())
->ComputeTargetRanges(aDeleteDirectionAndAmount,
rangesToDelete);
if (rv == NS_ERROR_EDITOR_DESTROYED) {
NS_WARNING("HTMLEditor::ComputeTargetRanges() destroyed the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
if (rv == NS_ERROR_EDITOR_NO_EDITABLE_RANGE) {
// For now, keep dispatching `beforeinput` event even if no selection
// range can be editable.
rv = NS_OK;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"HTMLEditor::ComputeTargetRanges() failed, but ignored");
for (auto& range : rangesToDelete.Ranges()) {
RefPtr<StaticRange> staticRange =
StaticRange::Create(range, IgnoreErrors());
if (NS_WARN_IF(!staticRange)) {
continue;
}
AppendTargetRange(*staticRange);
}
}
}
// Otherwise, just set target ranges to selection ranges.
else if (MayHaveTargetRangesOnHTMLEditor(inputType)) {
if (uint32_t rangeCount = editorBase->SelectionRef().RangeCount()) {
mTargetRanges.SetCapacity(rangeCount);
for (const uint32_t i : IntegerRange(rangeCount)) {
MOZ_ASSERT(editorBase->SelectionRef().RangeCount() == rangeCount);
const nsRange* range = editorBase->SelectionRef().GetRangeAt(i);
MOZ_ASSERT(range);
MOZ_ASSERT(range->IsPositioned());
if (MOZ_UNLIKELY(NS_WARN_IF(!range)) ||
MOZ_UNLIKELY(NS_WARN_IF(!range->IsPositioned()))) {
continue;
}
// Now, we need to fix the offset of target range because it may
// be referred after modifying the DOM tree and range boundaries
// of `range` may have not computed offset yet.
RefPtr<StaticRange> targetRange = StaticRange::Create(
range->GetStartContainer(), range->StartOffset(),
range->GetEndContainer(), range->EndOffset(), IgnoreErrors());
if (NS_WARN_IF(!targetRange) ||
NS_WARN_IF(!targetRange->IsPositioned())) {
continue;
}
mTargetRanges.AppendElement(std::move(targetRange));
}
}
}
}
nsEventStatus status = nsEventStatus_eIgnore;
InputEventOptions::NeverCancelable neverCancelable =
mMakeBeforeInputEventNonCancelable
? InputEventOptions::NeverCancelable::Yes
: InputEventOptions::NeverCancelable::No;
nsresult rv = nsContentUtils::DispatchInputEvent(
targetElement, eEditorBeforeInput, inputType, editorBase,
mDataTransfer
? InputEventOptions(mDataTransfer, std::move(mTargetRanges),
neverCancelable)
: InputEventOptions(mData, std::move(mTargetRanges), neverCancelable),
&status);
if (NS_WARN_IF(mEditorBase.Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_FAILED(rv)) {
NS_WARNING("nsContentUtils::DispatchInputEvent() failed");
return rv;
}
mBeforeInputEventCanceled = status == nsEventStatus_eConsumeNoDefault;
if (mBeforeInputEventCanceled && mEditorBase.IsHTMLEditor()) {
mEditorBase.AsHTMLEditor()->mHasBeforeInputBeenCanceled = true;
}
return mBeforeInputEventCanceled ? NS_ERROR_EDITOR_ACTION_CANCELED : NS_OK;
}
/*****************************************************************************
* mozilla::EditorBase::TopLevelEditSubActionData
*****************************************************************************/
nsresult EditorBase::TopLevelEditSubActionData::AddNodeToChangedRange(
const HTMLEditor& aHTMLEditor, nsINode& aNode) {
EditorRawDOMPoint startPoint(&aNode);
EditorRawDOMPoint endPoint(&aNode);
DebugOnly<bool> advanced = endPoint.AdvanceOffset();
NS_WARNING_ASSERTION(advanced, "Failed to set endPoint to next to aNode");
nsresult rv = AddRangeToChangedRange(aHTMLEditor, startPoint, endPoint);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"TopLevelEditSubActionData::AddRangeToChangedRange() failed");
return rv;
}
nsresult EditorBase::TopLevelEditSubActionData::AddPointToChangedRange(
const HTMLEditor& aHTMLEditor, const EditorRawDOMPoint& aPoint) {
nsresult rv = AddRangeToChangedRange(aHTMLEditor, aPoint, aPoint);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"TopLevelEditSubActionData::AddRangeToChangedRange() failed");
return rv;
}
nsresult EditorBase::TopLevelEditSubActionData::AddRangeToChangedRange(
const HTMLEditor& aHTMLEditor, const EditorRawDOMPoint& aStart,
const EditorRawDOMPoint& aEnd) {
if (NS_WARN_IF(!aStart.IsSet()) || NS_WARN_IF(!aEnd.IsSet())) {
return NS_ERROR_INVALID_ARG;
}
if (!aHTMLEditor.IsDescendantOfRoot(aStart.GetContainer()) ||
(aStart.GetContainer() != aEnd.GetContainer() &&
!aHTMLEditor.IsDescendantOfRoot(aEnd.GetContainer()))) {
return NS_OK;
}
// If mChangedRange hasn't been set, we can just set it to `aStart` and
// `aEnd`.
if (!mChangedRange->IsPositioned()) {
nsresult rv = mChangedRange->SetStartAndEnd(aStart.ToRawRangeBoundary(),
aEnd.ToRawRangeBoundary());
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "nsRange::SetStartAndEnd() failed");
return rv;
}
Maybe<int32_t> relation =
mChangedRange->StartRef().IsSet()
? nsContentUtils::ComparePoints(mChangedRange->StartRef(),
aStart.ToRawRangeBoundary())
: Some(1);
if (NS_WARN_IF(!relation)) {
return NS_ERROR_FAILURE;
}
// If aStart is before start of mChangedRange, reset the start.
if (*relation > 0) {
ErrorResult error;
mChangedRange->SetStart(aStart.ToRawRangeBoundary(), error);
if (error.Failed()) {
NS_WARNING("nsRange::SetStart() failed");
return error.StealNSResult();
}
}
relation = mChangedRange->EndRef().IsSet()
? nsContentUtils::ComparePoints(mChangedRange->EndRef(),
aEnd.ToRawRangeBoundary())
: Some(1);
if (NS_WARN_IF(!relation)) {
return NS_ERROR_FAILURE;
}
// If aEnd is after end of mChangedRange, reset the end.
if (*relation < 0) {
ErrorResult error;
mChangedRange->SetEnd(aEnd.ToRawRangeBoundary(), error);
if (error.Failed()) {
NS_WARNING("nsRange::SetEnd() failed");
return error.StealNSResult();
}
}
return NS_OK;
}
void EditorBase::TopLevelEditSubActionData::DidCreateElement(
EditorBase& aEditorBase, Element& aNewElement) {
MOZ_ASSERT(aEditorBase.AsHTMLEditor());
if (!aEditorBase.mInitSucceeded || aEditorBase.Destroyed()) {
return; // We have not been initialized yet or already been destroyed.
}
if (!aEditorBase.EditSubActionDataRef().mAdjustChangedRangeFromListener) {
return; // Temporarily disabled by edit sub-action handler.
}
DebugOnly<nsresult> rvIgnored =
AddNodeToChangedRange(*aEditorBase.AsHTMLEditor(), aNewElement);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"TopLevelEditSubActionData::AddNodeToChangedRange() failed, but ignored");
}
void EditorBase::TopLevelEditSubActionData::DidInsertContent(
EditorBase& aEditorBase, nsIContent& aNewContent) {
MOZ_ASSERT(aEditorBase.AsHTMLEditor());
if (!aEditorBase.mInitSucceeded || aEditorBase.Destroyed()) {
return; // We have not been initialized yet or already been destroyed.
}
if (!aEditorBase.EditSubActionDataRef().mAdjustChangedRangeFromListener) {
return; // Temporarily disabled by edit sub-action handler.
}
DebugOnly<nsresult> rvIgnored =
AddNodeToChangedRange(*aEditorBase.AsHTMLEditor(), aNewContent);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"TopLevelEditSubActionData::AddNodeToChangedRange() failed, but ignored");
}
void EditorBase::TopLevelEditSubActionData::WillDeleteContent(
EditorBase& aEditorBase, nsIContent& aRemovingContent) {
MOZ_ASSERT(aEditorBase.AsHTMLEditor());
if (!aEditorBase.mInitSucceeded || aEditorBase.Destroyed()) {
return; // We have not been initialized yet or already been destroyed.
}
if (!aEditorBase.EditSubActionDataRef().mAdjustChangedRangeFromListener) {
return; // Temporarily disabled by edit sub-action handler.
}
DebugOnly<nsresult> rvIgnored =
AddNodeToChangedRange(*aEditorBase.AsHTMLEditor(), aRemovingContent);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"TopLevelEditSubActionData::AddNodeToChangedRange() failed, but ignored");
}
void EditorBase::TopLevelEditSubActionData::DidSplitContent(
EditorBase& aEditorBase, nsIContent& aSplitContent, nsIContent& aNewContent,
SplitNodeDirection aSplitNodeDirection) {
MOZ_ASSERT(aEditorBase.AsHTMLEditor());
if (!aEditorBase.mInitSucceeded || aEditorBase.Destroyed()) {
return; // We have not been initialized yet or already been destroyed.
}
if (!aEditorBase.EditSubActionDataRef().mAdjustChangedRangeFromListener) {
return; // Temporarily disabled by edit sub-action handler.
}
DebugOnly<nsresult> rvIgnored =
aSplitNodeDirection == SplitNodeDirection::LeftNodeIsNewOne
? AddRangeToChangedRange(*aEditorBase.AsHTMLEditor(),
EditorRawDOMPoint(&aNewContent, 0),
EditorRawDOMPoint(&aSplitContent, 0))
: AddRangeToChangedRange(*aEditorBase.AsHTMLEditor(),
EditorRawDOMPoint::AtEndOf(aSplitContent),
EditorRawDOMPoint::AtEndOf(aNewContent));
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"TopLevelEditSubActionData::AddRangeToChangedRange() "
"failed, but ignored");
}
void EditorBase::TopLevelEditSubActionData::DidJoinContents(
EditorBase& aEditorBase, const EditorRawDOMPoint& aJoinedPoint) {
MOZ_ASSERT(aEditorBase.AsHTMLEditor());
if (!aEditorBase.mInitSucceeded || aEditorBase.Destroyed()) {
return; // We have not been initialized yet or already been destroyed.
}
if (!aEditorBase.EditSubActionDataRef().mAdjustChangedRangeFromListener) {
return; // Temporarily disabled by edit sub-action handler.
}
DebugOnly<nsresult> rvIgnored =
AddPointToChangedRange(*aEditorBase.AsHTMLEditor(), aJoinedPoint);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"TopLevelEditSubActionData::AddPointToChangedRange() "
"failed, but ignored");
}
void EditorBase::TopLevelEditSubActionData::DidInsertText(
EditorBase& aEditorBase, const EditorRawDOMPoint& aInsertionBegin,
const EditorRawDOMPoint& aInsertionEnd) {
MOZ_ASSERT(aEditorBase.AsHTMLEditor());
if (!aEditorBase.mInitSucceeded || aEditorBase.Destroyed()) {
return; // We have not been initialized yet or already been destroyed.
}
if (!aEditorBase.EditSubActionDataRef().mAdjustChangedRangeFromListener) {
return; // Temporarily disabled by edit sub-action handler.
}
DebugOnly<nsresult> rvIgnored = AddRangeToChangedRange(
*aEditorBase.AsHTMLEditor(), aInsertionBegin, aInsertionEnd);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"TopLevelEditSubActionData::AddRangeToChangedRange() "
"failed, but ignored");
}
void EditorBase::TopLevelEditSubActionData::DidDeleteText(
EditorBase& aEditorBase, const EditorRawDOMPoint& aStartInTextNode) {
MOZ_ASSERT(aEditorBase.AsHTMLEditor());
if (!aEditorBase.mInitSucceeded || aEditorBase.Destroyed()) {
return; // We have not been initialized yet or already been destroyed.
}
if (!aEditorBase.EditSubActionDataRef().mAdjustChangedRangeFromListener) {
return; // Temporarily disabled by edit sub-action handler.
}
DebugOnly<nsresult> rvIgnored =
AddPointToChangedRange(*aEditorBase.AsHTMLEditor(), aStartInTextNode);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"TopLevelEditSubActionData::AddPointToChangedRange() "
"failed, but ignored");
}
void EditorBase::TopLevelEditSubActionData::WillDeleteRange(
EditorBase& aEditorBase, const EditorRawDOMPoint& aStart,
const EditorRawDOMPoint& aEnd) {
MOZ_ASSERT(aEditorBase.AsHTMLEditor());
MOZ_ASSERT(aStart.IsSet());
MOZ_ASSERT(aEnd.IsSet());
if (!aEditorBase.mInitSucceeded || aEditorBase.Destroyed()) {
return; // We have not been initialized yet or already been destroyed.
}
if (!aEditorBase.EditSubActionDataRef().mAdjustChangedRangeFromListener) {
return; // Temporarily disabled by edit sub-action handler.
}
// XXX Looks like that this is wrong. We delete multiple selection ranges
// once, but this adds only first range into the changed range.
// Anyway, we should take the range as an argument.
DebugOnly<nsresult> rvIgnored =
AddRangeToChangedRange(*aEditorBase.AsHTMLEditor(), aStart, aEnd);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"TopLevelEditSubActionData::AddRangeToChangedRange() "
"failed, but ignored");
}
nsPIDOMWindowOuter* EditorBase::GetWindow() const {
return mDocument ? mDocument->GetWindow() : nullptr;
}
nsPIDOMWindowInner* EditorBase::GetInnerWindow() const {
return mDocument ? mDocument->GetInnerWindow() : nullptr;
}
PresShell* EditorBase::GetPresShell() const {
return mDocument ? mDocument->GetPresShell() : nullptr;
}
nsPresContext* EditorBase::GetPresContext() const {
PresShell* presShell = GetPresShell();
return presShell ? presShell->GetPresContext() : nullptr;
}
already_AddRefed<nsCaret> EditorBase::GetCaret() const {
PresShell* presShell = GetPresShell();
if (NS_WARN_IF(!presShell)) {
return nullptr;
}
return presShell->GetCaret();
}
nsISelectionController* EditorBase::GetSelectionController() const {
if (mSelectionController) {
return mSelectionController;
}
if (!mDocument) {
return nullptr;
}
return mDocument->GetPresShell();
}
} // namespace mozilla
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