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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 "mozilla/EditorBase.h"
#include "mozilla/DebugOnly.h" // for DebugOnly
#include "mozilla/Encoding.h" // for Encoding
#include <stdio.h> // for nullptr, stdout
#include <string.h> // for strcmp
#include "ChangeAttributeTransaction.h" // for ChangeAttributeTransaction
#include "CompositionTransaction.h" // for CompositionTransaction
#include "CreateElementTransaction.h" // for CreateElementTransaction
#include "DeleteNodeTransaction.h" // for DeleteNodeTransaction
#include "DeleteRangeTransaction.h" // for DeleteRangeTransaction
#include "DeleteTextTransaction.h" // for DeleteTextTransaction
#include "EditAggregateTransaction.h" // for EditAggregateTransaction
#include "EditorEventListener.h" // for EditorEventListener
#include "HTMLEditRules.h" // for HTMLEditRules
#include "InsertNodeTransaction.h" // for InsertNodeTransaction
#include "InsertTextTransaction.h" // for InsertTextTransaction
#include "JoinNodeTransaction.h" // for JoinNodeTransaction
#include "PlaceholderTransaction.h" // for PlaceholderTransaction
#include "SplitNodeTransaction.h" // for SplitNodeTransaction
#include "TextEditUtils.h" // for TextEditUtils
#include "mozilla/CheckedInt.h" // for CheckedInt
#include "mozilla/ComputedStyle.h" // for ComputedStyle
#include "mozilla/CSSEditUtils.h" // for CSSEditUtils
#include "mozilla/EditAction.h" // for EditSubAction
#include "mozilla/EditorDOMPoint.h" // for EditorDOMPoint
#include "mozilla/EditorSpellCheck.h" // for EditorSpellCheck
#include "mozilla/EditorUtils.h" // for various helper classes.
#include "mozilla/EditTransactionBase.h" // for EditTransactionBase
#include "mozilla/FlushType.h" // for FlushType::Frames
#include "mozilla/IMEContentObserver.h" // for IMEContentObserver
#include "mozilla/IMEStateManager.h" // for IMEStateManager
#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/dom/Selection.h" // for Selection, etc.
#include "mozilla/Services.h" // for GetObserverService
#include "mozilla/ServoCSSParser.h" // for ServoCSSParser
#include "mozilla/TextComposition.h" // for TextComposition
#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/CharacterData.h" // for CharacterData
#include "mozilla/dom/DataTransfer.h" // for DataTransfer
#include "mozilla/dom/Element.h" // for Element, nsINode::AsElement
#include "mozilla/dom/EventTarget.h" // for EventTarget
#include "mozilla/dom/HTMLBodyElement.h"
#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 "nsComponentManagerUtils.h" // for do_CreateInstance
#include "nsComputedDOMStyle.h" // for nsComputedDOMStyle
#include "nsContentUtils.h" // for nsContentUtils
#include "nsDOMString.h" // for DOMStringIsNull
#include "nsDebug.h" // for NS_ENSURE_TRUE, 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 "nsIAbsorbingTransaction.h" // for nsIAbsorbingTransaction
#include "nsAtom.h" // for nsAtom
#include "nsIContent.h" // for nsIContent
#include "mozilla/dom/Document.h" // for Document
#include "nsIDOMEventListener.h" // for nsIDOMEventListener
#include "nsIDocumentStateListener.h" // for nsIDocumentStateListener
#include "nsIEditActionListener.h" // for nsIEditActionListener
#include "nsIEditorObserver.h" // for nsIEditorObserver
#include "nsIEditorSpellCheck.h" // for nsIEditorSpellCheck
#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 "nsIPlaintextEditor.h" // for nsIPlaintextEditor, etc.
#include "nsISelectionController.h" // for nsISelectionController, etc.
#include "nsISelectionDisplay.h" // for nsISelectionDisplay, etc.
#include "nsISupportsBase.h" // for nsISupports
#include "nsISupportsUtils.h" // for NS_ADDREF, NS_IF_ADDREF
#include "nsITransferable.h" // for nsITransferable
#include "nsITransaction.h" // for nsITransaction
#include "nsITransactionManager.h"
#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 NS_STYLE_DIRECTION_RTL, etc.
#include "nsStyleStruct.h" // for nsStyleDisplay, nsStyleText, etc.
#include "nsStyleStructFwd.h" // for nsIFrame::StyleUIReset, etc.
#include "nsStyleUtil.h" // for nsStyleUtil
#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;
/*****************************************************************************
* mozilla::EditorBase
*****************************************************************************/
EditorBase::EditorBase()
: mEditActionData(nullptr),
mPlaceholderName(nullptr),
mModCount(0),
mFlags(0),
mUpdateCount(0),
mPlaceholderBatch(0),
mDocDirtyState(-1),
mSpellcheckCheckboxState(eTriUnset),
mAllowsTransactionsToChangeSelection(true),
mDidPreDestroy(false),
mDidPostCreate(false),
mDispatchInputEvent(true),
mIsInEditSubAction(false),
mHidingCaret(false),
mSpellCheckerDictionaryUpdated(true),
mIsHTMLEditorClass(false) {}
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(mEditorObservers)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDocStateListeners)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mEventTarget)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPlaceholderTransaction)
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(mEditorObservers)
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_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::Init(Document& aDocument, Element* aRoot,
nsISelectionController* aSelectionController,
uint32_t aFlags, const nsAString& aValue) {
MOZ_ASSERT(GetTopLevelEditSubAction() == EditSubAction::eNone,
"Initializing during an edit action is an error");
// First only set flags, but other stuff shouldn't be initialized now.
// Note that SetFlags() will be called by PostCreate().
mFlags = aFlags;
mDocument = &aDocument;
// HTML editors currently don't have their own selection controller,
// so they'll pass null as aSelCon, and we'll get the selection controller
// off of the presshell.
nsCOMPtr<nsISelectionController> selectionController;
if (aSelectionController) {
mSelectionController = aSelectionController;
selectionController = aSelectionController;
} else {
selectionController = GetPresShell();
}
MOZ_ASSERT(selectionController,
"Selection controller should be available at this point");
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 = selectionController->GetSelection(
nsISelectionController::SELECTION_NORMAL);
NS_WARNING_ASSERTION(selection,
"We cannot update selection cache in the edit action");
if (selection) {
mEditActionData->UpdateSelectionCache(*selection);
}
}
// set up root element if we are passed one.
if (aRoot) {
mRootElement = aRoot;
}
mUpdateCount = 0;
// 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.
selectionController->SetCaretReadOnly(false);
selectionController->SetDisplaySelection(
nsISelectionController::SELECTION_ON);
// Show all the selection reflected to user.
selectionController->SetSelectionFlags(nsISelectionDisplay::DISPLAY_ALL);
MOZ_ASSERT(IsInitialized());
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_FAILURE;
}
SelectionRefPtr()->AddSelectionListener(this);
// Make sure that the editor will be destroyed properly
mDidPreDestroy = false;
// Make sure that the ediotr will be created properly
mDidPostCreate = false;
return NS_OK;
}
nsresult EditorBase::PostCreate() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
// 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_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
// These operations only need to happen on the first PostCreate call
if (!mDidPostCreate) {
mDidPostCreate = true;
// Set up listeners
CreateEventListeners();
rv = InstallEventListeners();
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
// nuke the modification count, so the doc appears unmodified
// do this before we notify listeners
ResetModificationCount();
// update the UI with our state
NotifyDocumentListeners(eDocumentCreated);
NotifyDocumentListeners(eDocumentStateChanged);
}
// update nsTextStateManager and caret if we have focus
nsCOMPtr<nsIContent> focusedContent = GetFocusedContent();
if (focusedContent) {
InitializeSelection(focusedContent);
// 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.
mEventListener->SpellCheckIfNeeded();
IMEState newState;
if (NS_WARN_IF(NS_FAILED(GetPreferredIMEState(&newState)))) {
return NS_OK;
}
// May be null in design mode
nsCOMPtr<nsIContent> content = GetFocusedContentForIME();
IMEStateManager::UpdateIMEState(newState, content, 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.
nsCOMPtr<nsIContent> rootContent = GetRoot();
NS_ENSURE_TRUE(rootContent, NS_ERROR_NOT_AVAILABLE);
mEventTarget = rootContent->GetParent();
NS_ENSURE_TRUE(mEventTarget, NS_ERROR_NOT_AVAILABLE);
nsresult rv = mEventListener->Connect(this);
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::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 (!IsPlaintextEditor()) {
// 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::PreDestroy(bool aDestroyingFrames) {
if (mDidPreDestroy) {
return;
}
if (IsPasswordEditor() && !AsTextEditor()->IsAllMasked()) {
// Mask all range for now because if layout accessed the range, that
// would cause showing password accidentary or crash.
AsTextEditor()->MaskAllCharacters();
}
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) mInlineSpellChecker->Cleanup(aDestroyingFrames);
// tell our listeners that the doc is going away
NotifyDocumentListeners(eDocumentToBeDestroyed);
// Unregister event listeners
RemoveEventListeners();
// If this editor is still hiding the caret, we need to restore it.
HideCaret(false);
mActionListeners.Clear();
mEditorObservers.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,
"Failed to disable undo/redo transactions");
mTransactionManager = nullptr;
}
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;
}
DebugOnly<bool> changingPasswordEditorFlagDynamically =
mFlags != ~aFlags &&
((mFlags ^ aFlags) & nsIPlaintextEditor::eEditorPasswordMask);
MOZ_ASSERT(
!changingPasswordEditorFlagDynamically,
"TextEditor does not support dynamic eEditorPasswordMask flag change");
bool spellcheckerWasEnabled = 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.
nsCOMPtr<nsIContent> focusedContent = GetFocusedContent();
if (focusedContent) {
IMEState newState;
nsresult rv = GetPreferredIMEState(&newState);
if (NS_SUCCEEDED(rv)) {
// NOTE: When the enabled state isn't going to be modified, this method
// is going to do nothing.
nsCOMPtr<nsIContent> content = GetFocusedContentForIME();
IMEStateManager::UpdateIMEState(newState, content, this);
}
}
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetIsSelectionEditable(bool* aIsSelectionEditable) {
NS_ENSURE_ARG_POINTER(aIsSelectionEditable);
*aIsSelectionEditable = IsSelectionEditable();
return NS_OK;
}
bool EditorBase::IsSelectionEditable() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return false;
}
if (!mIsHTMLEditorClass) {
// XXX we just check that the anchor node is editable at the moment
// we should check that all nodes in the selection are editable
nsCOMPtr<nsINode> anchorNode = SelectionRefPtr()->GetAnchorNode();
return anchorNode && IsEditable(anchorNode);
}
nsINode* anchorNode = SelectionRefPtr()->GetAnchorNode();
nsINode* focusNode = SelectionRefPtr()->GetFocusNode();
if (!anchorNode || !focusNode) {
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 = SelectionRefPtr()->RangeCount() &&
anchorNode->IsEditable() &&
focusNode->IsEditable();
if (!isSelectionEditable) {
return false;
}
nsINode* commonAncestor =
SelectionRefPtr()->GetAnchorFocusRange()->GetCommonAncestor();
while (commonAncestor && !commonAncestor->IsEditable()) {
commonAncestor = commonAncestor->GetParentNode();
}
// If there is no editable common ancestor, return false.
return !!commonAncestor;
}
NS_IMETHODIMP
EditorBase::GetIsDocumentEditable(bool* aIsDocumentEditable) {
NS_ENSURE_ARG_POINTER(aIsDocumentEditable);
RefPtr<Document> doc = GetDocument();
*aIsDocumentEditable = doc && IsModifiable();
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetDocument(Document** aDoc) {
NS_IF_ADDREF(*aDoc = mDocument);
return *aDoc ? NS_OK : NS_ERROR_NOT_INITIALIZED;
}
already_AddRefed<nsIWidget> EditorBase::GetWidget() {
nsPresContext* presContext = GetPresContext();
if (NS_WARN_IF(!presContext)) {
return nullptr;
}
nsCOMPtr<nsIWidget> widget = presContext->GetRootWidget();
NS_ENSURE_TRUE(widget.get(), nullptr);
return widget.forget();
}
NS_IMETHODIMP
EditorBase::GetContentsMIMEType(char** aContentsMIMEType) {
NS_ENSURE_ARG_POINTER(aContentsMIMEType);
*aContentsMIMEType = ToNewCString(mContentMIMEType);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::SetContentsMIMEType(const char* aContentsMIMEType) {
mContentMIMEType.Assign(aContentsMIMEType ? aContentsMIMEType : "");
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetSelectionController(nsISelectionController** aSel) {
NS_ENSURE_TRUE(aSel, NS_ERROR_NULL_POINTER);
*aSel = nullptr; // init out param
nsCOMPtr<nsISelectionController> selCon = GetSelectionController();
if (NS_WARN_IF(!selCon)) {
return NS_ERROR_NOT_INITIALIZED;
}
selCon.forget(aSel);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::DeleteSelection(EDirection aAction, EStripWrappers aStripWrappers) {
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
EditorBase::GetSelection(Selection** aSelection) {
return GetSelection(SelectionType::eNormal, aSelection);
}
nsresult EditorBase::GetSelection(SelectionType aSelectionType,
Selection** aSelection) const {
if (NS_WARN_IF(!aSelection)) {
return NS_ERROR_INVALID_ARG;
}
if (IsEditActionDataAvailable()) {
*aSelection = do_AddRef(SelectionRefPtr()).take();
return NS_OK;
}
*aSelection = nullptr;
nsISelectionController* selcon = GetSelectionController();
if (!selcon) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Selection> selection =
selcon->GetSelection(ToRawSelectionType(aSelectionType));
if (!selection) {
return NS_ERROR_INVALID_ARG;
}
selection.forget(aSelection);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::DoTransaction(nsITransaction* aTxn) {
AutoEditActionDataSetter editActionData(*this, EditAction::eUnknown);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_FAILURE;
}
// This is a low level API. So, the caller might require raw error code.
// Therefore, don't need to use EditorBase::ToGenericNSResult().
return DoTransactionInternal(aTxn);
}
nsresult EditorBase::DoTransactionInternal(nsITransaction* aTxn) {
if (mPlaceholderBatch && !mPlaceholderTransaction) {
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;
DoTransactionInternal(placeholderTransaction);
if (mTransactionManager) {
nsCOMPtr<nsITransaction> topTransaction =
mTransactionManager->PeekUndoStack();
nsCOMPtr<nsIAbsorbingTransaction> topAbsorbingTransaction =
do_QueryInterface(topTransaction);
if (topAbsorbingTransaction) {
RefPtr<PlaceholderTransaction> topPlaceholderTransaction =
topAbsorbingTransaction->AsPlaceholderTransaction();
if (topPlaceholderTransaction) {
// 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 (aTxn) {
// 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(SelectionRefPtr());
nsresult rv;
if (mTransactionManager) {
RefPtr<TransactionManager> transactionManager(mTransactionManager);
rv = transactionManager->DoTransaction(aTxn);
} else {
rv = aTxn->DoTransaction();
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
DoAfterDoTransaction(aTxn);
}
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,
"Failed to enable undo/redo transactions");
return NS_OK;
}
DebugOnly<bool> disabledUndoRedo = DisableUndoRedo();
NS_WARNING_ASSERTION(disabledUndoRedo,
"Failed to disable undo/redo transactions");
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetTransactionManager(nsITransactionManager** aTransactionManager) {
if (NS_WARN_IF(!aTransactionManager)) {
return NS_ERROR_INVALID_ARG;
}
if (NS_WARN_IF(!mTransactionManager)) {
return NS_ERROR_FAILURE;
}
NS_IF_ADDREF(*aTransactionManager = mTransactionManager);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::Undo(uint32_t aCount) {
nsresult rv = MOZ_KnownLive(AsTextEditor())->UndoAsAction(aCount);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to do Undo");
return rv;
}
NS_IMETHODIMP
EditorBase::CanUndo(bool* aIsEnabled, bool* aCanUndo) {
if (NS_WARN_IF(!aIsEnabled) || NS_WARN_IF(!aCanUndo)) {
return NS_ERROR_INVALID_ARG;
}
*aCanUndo = CanUndo();
*aIsEnabled = IsUndoRedoEnabled();
return NS_OK;
}
NS_IMETHODIMP
EditorBase::Redo(uint32_t aCount) {
nsresult rv = MOZ_KnownLive(AsTextEditor())->RedoAsAction(aCount);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to do Redo");
return rv;
}
NS_IMETHODIMP
EditorBase::CanRedo(bool* aIsEnabled, bool* aCanRedo) {
if (NS_WARN_IF(!aIsEnabled) || NS_WARN_IF(!aCanRedo)) {
return NS_ERROR_INVALID_ARG;
}
*aCanRedo = CanRedo();
*aIsEnabled = IsUndoRedoEnabled();
return NS_OK;
}
NS_IMETHODIMP
EditorBase::BeginTransaction() {
AutoEditActionDataSetter editActionData(*this, EditAction::eUnknown);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_FAILURE;
}
BeginTransactionInternal();
return NS_OK;
}
void EditorBase::BeginTransactionInternal() {
BeginUpdateViewBatch();
if (mTransactionManager) {
RefPtr<TransactionManager> transactionManager(mTransactionManager);
transactionManager->BeginBatch(nullptr);
}
}
NS_IMETHODIMP
EditorBase::EndTransaction() {
AutoEditActionDataSetter editActionData(*this, EditAction::eUnknown);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_FAILURE;
}
EndTransactionInternal();
return NS_OK;
}
void EditorBase::EndTransactionInternal() {
if (mTransactionManager) {
RefPtr<TransactionManager> transactionManager(mTransactionManager);
transactionManager->EndBatch(false);
}
EndUpdateViewBatch();
}
void EditorBase::BeginPlaceholderTransaction(nsAtom* aTransactionName) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(mPlaceholderBatch >= 0, "negative placeholder batch count!");
if (!mPlaceholderBatch) {
NotifyEditorObservers(eNotifyEditorObserversOfBefore);
// time to turn on the batch
BeginUpdateViewBatch();
mPlaceholderTransaction = nullptr;
mPlaceholderName = aTransactionName;
mSelState.emplace();
mSelState->SaveSelection(SelectionRefPtr());
// 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() {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(mPlaceholderBatch > 0,
"zero or negative placeholder batch count when ending batch!");
if (mPlaceholderBatch == 1) {
// By making the assumption that no reflow happens during the calls
// to EndUpdateViewBatch and ScrollSelectionIntoView, 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.
SelectionRefPtr()->SetCanCacheFrameOffset(true);
// time to turn off the batch
EndUpdateViewBatch();
// make sure selection is in view
// After ScrollSelectionIntoView(), the pending notifications might be
// flushed and PresShell/PresContext/Frames may be dead. See bug 418470.
ScrollSelectionIntoView(false);
// cached for frame offset are Not available now
SelectionRefPtr()->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) {
mPlaceholderTransaction->EndPlaceHolderBatch();
// notify editor observers of action but if composing, it's done by
// compositionchange event handler.
if (!mComposition) {
NotifyEditorObservers(eNotifyEditorObserversOfEnd);
}
mPlaceholderTransaction = nullptr;
} else {
NotifyEditorObservers(eNotifyEditorObserversOfCancel);
}
}
mPlaceholderBatch--;
}
NS_IMETHODIMP
EditorBase::SetShouldTxnSetSelection(bool aShould) {
MakeThisAllowTransactionsToChangeSelection(aShould);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetDocumentIsEmpty(bool* aDocumentIsEmpty) {
return NS_ERROR_NOT_IMPLEMENTED;
}
// 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();
if (NS_WARN_IF(NS_FAILED(rv))) {
// This is low level API for XUL applcation. So, we should return raw
// error code here.
return rv;
}
return NS_OK;
}
nsresult EditorBase::SelectAllInternal() {
MOZ_ASSERT(IsInitialized());
CommitComposition();
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
// 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();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
EditorBase::BeginningOfDocument() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
// get the root element
dom::Element* rootElement = GetRoot();
if (NS_WARN_IF(!rootElement)) {
return NS_ERROR_NULL_POINTER;
}
// find first editable thingy
nsCOMPtr<nsINode> firstNode = GetFirstEditableNode(rootElement);
if (!firstNode) {
// just the root node, set selection to inside the root
return SelectionRefPtr()->Collapse(rootElement, 0);
}
if (firstNode->NodeType() == nsINode::TEXT_NODE) {
// If firstNode is text, set selection to beginning of the text node.
return SelectionRefPtr()->Collapse(firstNode, 0);
}
// Otherwise, it's a leaf node and we set the selection just in front of it.
nsCOMPtr<nsIContent> parent = firstNode->GetParent();
if (!parent) {
return NS_ERROR_NULL_POINTER;
}
MOZ_ASSERT(
parent->ComputeIndexOf(firstNode) == 0,
"How come the first node isn't the left most child in its parent?");
return SelectionRefPtr()->Collapse(parent, 0);
}
NS_IMETHODIMP
EditorBase::EndOfDocument() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = CollapseSelectionToEnd();
if (NS_WARN_IF(NS_FAILED(rv))) {
// This is low level API for XUL applcation. So, we should return raw
// error code here.
return rv;
}
return NS_OK;
}
nsresult EditorBase::CollapseSelectionToEnd() {
MOZ_ASSERT(IsEditActionDataAvailable());
// XXX Why doesn't this check if the document is alive?
if (NS_WARN_IF(!IsInitialized())) {
return NS_ERROR_NOT_INITIALIZED;
}
// get the root element
nsINode* node = GetRoot();
if (NS_WARN_IF(!node)) {
return NS_ERROR_NULL_POINTER;
}
nsINode* child = node->GetLastChild();
while (child && IsContainer(child)) {
node = child;
child = node->GetLastChild();
}
uint32_t length = node->Length();
return SelectionRefPtr()->Collapse(node, static_cast<int32_t>(length));
}
NS_IMETHODIMP
EditorBase::GetDocumentModified(bool* outDocModified) {
NS_ENSURE_TRUE(outDocModified, NS_ERROR_NULL_POINTER);
int32_t modCount = 0;
GetModificationCount(&modCount);
*outDocModified = (modCount != 0);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetDocumentCharacterSet(nsACString& aCharset) {
return GetDocumentCharsetInternal(aCharset);
}
nsresult EditorBase::GetDocumentCharsetInternal(nsACString& aCharset) const {
RefPtr<Document> document = GetDocument();
if (NS_WARN_IF(!document)) {
return NS_ERROR_UNEXPECTED;
}
document->GetDocumentCharacterSet()->Name(aCharset);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::SetDocumentCharacterSet(const nsACString& characterSet) {
RefPtr<Document> document = GetDocument();
if (NS_WARN_IF(!document)) {
return NS_ERROR_UNEXPECTED;
}
// This method is scriptable, so add-ons could pass in something other
// than a canonical name.
auto encoding = Encoding::ForLabelNoReplacement(characterSet);
if (!encoding) {
return NS_ERROR_INVALID_ARG;
}
document->SetDocumentCharacterSet(WrapNotNull(encoding));
return NS_OK;
}
NS_IMETHODIMP
EditorBase::Cut() {
nsresult rv = MOZ_KnownLive(AsTextEditor())->CutAsAction();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to do Cut");
return rv;
}
NS_IMETHODIMP
EditorBase::CanCut(bool* aCanCut) {
if (NS_WARN_IF(!aCanCut)) {
return NS_ERROR_INVALID_ARG;
}
*aCanCut = AsTextEditor()->IsCutCommandEnabled();
return NS_OK;
}
NS_IMETHODIMP
EditorBase::Copy() { return NS_ERROR_NOT_IMPLEMENTED; }
NS_IMETHODIMP
EditorBase::CanCopy(bool* aCanCopy) {
if (NS_WARN_IF(!aCanCopy)) {
return NS_ERROR_INVALID_ARG;
}
*aCanCopy = AsTextEditor()->IsCopyCommandEnabled();
return NS_OK;
}
NS_IMETHODIMP
EditorBase::Paste(int32_t aClipboardType) {
nsresult rv =
MOZ_KnownLive(AsTextEditor())->PasteAsAction(aClipboardType, true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to do Paste");
return rv;
}
NS_IMETHODIMP
EditorBase::PasteTransferable(nsITransferable* aTransferable) {
nsresult rv =
MOZ_KnownLive(AsTextEditor())->PasteTransferableAsAction(aTransferable);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to do Paste transferable");
return rv;
}
NS_IMETHODIMP
EditorBase::CanPaste(int32_t aClipboardType, bool* aCanPaste) {
if (NS_WARN_IF(!aCanPaste)) {
return NS_ERROR_INVALID_ARG;
}
*aCanPaste = AsTextEditor()->CanPaste(aClipboardType);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::SetAttribute(Element* aElement, const nsAString& aAttribute,
const nsAString& aValue) {
if (NS_WARN_IF(aAttribute.IsEmpty())) {
return NS_ERROR_INVALID_ARG;
}
if (NS_WARN_IF(!aElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eSetAttribute);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<nsAtom> attribute = NS_Atomize(aAttribute);
nsresult rv = SetAttributeWithTransaction(*aElement, *attribute, aValue);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult EditorBase::SetAttributeWithTransaction(Element& aElement,
nsAtom& aAttribute,
const nsAString& aValue) {
RefPtr<ChangeAttributeTransaction> transaction =
ChangeAttributeTransaction::Create(aElement, aAttribute, aValue);
return DoTransactionInternal(transaction);
}
NS_IMETHODIMP
EditorBase::GetAttributeValue(Element* aElement, const nsAString& aAttribute,
nsAString& aResultValue, bool* aResultIsSet) {
NS_ENSURE_TRUE(aResultIsSet, NS_ERROR_NULL_POINTER);
*aResultIsSet = false;
if (!aElement) {
return NS_OK;
}
nsAutoString value;
aElement->GetAttribute(aAttribute, value);
if (!DOMStringIsNull(value)) {
*aResultIsSet = true;
aResultValue = value;
}
return NS_OK;
}
NS_IMETHODIMP
EditorBase::RemoveAttribute(Element* aElement, const nsAString& aAttribute) {
if (NS_WARN_IF(aAttribute.IsEmpty())) {
return NS_ERROR_INVALID_ARG;
}
if (NS_WARN_IF(!aElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eRemoveAttribute);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<nsAtom> attribute = NS_Atomize(aAttribute);
nsresult rv = RemoveAttributeWithTransaction(*aElement, *attribute);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult EditorBase::RemoveAttributeWithTransaction(Element& aElement,
nsAtom& aAttribute) {
// XXX If aElement doesn't have aAttribute, shouldn't we stop creating
// the transaction? Otherwise, there will be added a transaction
// which does nothing at doing undo/redo.
RefPtr<ChangeAttributeTransaction> transaction =
ChangeAttributeTransaction::CreateToRemove(aElement, aAttribute);
return DoTransactionInternal(transaction);
}
NS_IMETHODIMP
EditorBase::MarkNodeDirty(nsINode* aNode) {
// Mark the node dirty, but not for webpages (bug 599983)
if (!OutputsMozDirty()) {
return NS_OK;
}
if (RefPtr<Element> element = Element::FromNodeOrNull(aNode)) {
element->SetAttr(kNameSpaceID_None, nsGkAtoms::mozdirty, EmptyString(),
false);
}
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetInlineSpellChecker(bool autoCreate,
nsIInlineSpellChecker** aInlineSpellChecker) {
NS_ENSURE_ARG_POINTER(aInlineSpellChecker);
if (mDidPreDestroy) {
// Don't allow people to get or create the spell checker once the editor
// is going away.
*aInlineSpellChecker = nullptr;
return autoCreate ? NS_ERROR_NOT_AVAILABLE : NS_OK;
}
// We don't want to show the spell checking UI if there are no spell check
// dictionaries available.
bool canSpell = mozInlineSpellChecker::CanEnableInlineSpellChecking();
if (!canSpell) {
*aInlineSpellChecker = nullptr;
return NS_ERROR_FAILURE;
}
nsresult rv;
if (!mInlineSpellChecker && autoCreate) {
mInlineSpellChecker = new mozInlineSpellChecker();
}
if (mInlineSpellChecker) {
rv = mInlineSpellChecker->Init(this);
if (NS_FAILED(rv)) {
mInlineSpellChecker = nullptr;
}
NS_ENSURE_SUCCESS(rv, rv);
}
NS_IF_ADDREF(*aInlineSpellChecker = mInlineSpellChecker);
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;
GetInlineSpellChecker(enable, getter_AddRefs(spellChecker));
if (mInlineSpellChecker) {
if (!mSpellCheckerDictionaryUpdated && enable) {
mInlineSpellChecker->UpdateCurrentDictionary();
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
mInlineSpellChecker->SetEnableRealTimeSpell(enable && spellChecker);
}
}
NS_IMETHODIMP
EditorBase::SetSpellcheckUserOverride(bool enable) {
mSpellcheckCheckboxState = enable ? eTriTrue : eTriFalse;
SyncRealTimeSpell();
return NS_OK;
}
already_AddRefed<Element> EditorBase::CreateNodeWithTransaction(
nsAtom& aTagName, const EditorDOMPoint& aPointToInsert) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
// XXX We need offset at new node for RangeUpdaterRef(). Therefore, we need
// to compute the offset now but this is expensive. So, if it's possible,
// we need to redesign RangeUpdaterRef() as avoiding using indices.
Unused << aPointToInsert.Offset();
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eCreateNode, nsIEditor::eNext);
RefPtr<Element> newElement;
RefPtr<CreateElementTransaction> transaction =
CreateElementTransaction::Create(*this, aTagName, aPointToInsert);
nsresult rv = DoTransactionInternal(transaction);
if (NS_WARN_IF(NS_FAILED(rv))) {
// XXX Why do we do this even when DoTransaction() returned error?
RangeUpdaterRef().SelAdjCreateNode(aPointToInsert);
} else {
newElement = transaction->GetNewNode();
MOZ_ASSERT(newElement);
// If we succeeded to create and insert new element, we need to adjust
// ranges in RangeUpdaterRef(). It currently requires offset of the new
// node. So, let's call it with original offset. Note that if
// aPointToInsert stores child node, it may not be at the offset since new
// element must be inserted before the old child. Although, mutation
// observer can do anything, but currently, we don't check it.
RangeUpdaterRef().SelAdjCreateNode(EditorRawDOMPoint(
aPointToInsert.GetContainer(), aPointToInsert.Offset()));
}
if (mRules && mRules->AsHTMLEditRules() && newElement) {
RefPtr<HTMLEditRules> htmlEditRules = mRules->AsHTMLEditRules();
htmlEditRules->DidCreateNode(*newElement);
}
if (!mActionListeners.IsEmpty()) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
listener->DidCreateNode(nsDependentAtomString(&aTagName), newElement, rv);
}
}
return newElement.forget();
}
NS_IMETHODIMP
EditorBase::InsertNode(nsINode* aNodeToInsert, nsINode* aContainer,
int32_t aOffset) {
nsCOMPtr<nsIContent> contentToInsert = do_QueryInterface(aNodeToInsert);
if (NS_WARN_IF(!contentToInsert)) {
return NS_ERROR_NULL_POINTER;
}
if (NS_WARN_IF(!aContainer)) {
return NS_ERROR_NULL_POINTER;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eInsertNode);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
int32_t offset =
aOffset < 0
? static_cast<int32_t>(aContainer->Length())
: std::min(aOffset, static_cast<int32_t>(aContainer->Length()));
nsresult rv = InsertNodeWithTransaction(*contentToInsert,
EditorDOMPoint(aContainer, offset));
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult EditorBase::InsertNodeWithTransaction(
nsIContent& aContentToInsert, const EditorDOMPoint& aPointToInsert) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (NS_WARN_IF(!aPointToInsert.IsSet())) {
return NS_ERROR_INVALID_ARG;
}
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eInsertNode, nsIEditor::eNext);
RefPtr<InsertNodeTransaction> transaction =
InsertNodeTransaction::Create(*this, aContentToInsert, aPointToInsert);
nsresult rv = DoTransactionInternal(transaction);
RangeUpdaterRef().SelAdjInsertNode(aPointToInsert);
if (mRules && mRules->AsHTMLEditRules()) {
RefPtr<HTMLEditRules> htmlEditRules = mRules->AsHTMLEditRules();
htmlEditRules->DidInsertNode(aContentToInsert);
}
if (!mActionListeners.IsEmpty()) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
listener->DidInsertNode(&aContentToInsert, rv);
}
}
return rv;
}
NS_IMETHODIMP
EditorBase::SplitNode(nsINode* aNode, int32_t aOffset, nsINode** aNewLeftNode) {
if (NS_WARN_IF(!aNode)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eSplitNode);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
int32_t offset =
std::min(std::max(aOffset, 0), static_cast<int32_t>(aNode->Length()));
ErrorResult error;
nsCOMPtr<nsIContent> newNode =
SplitNodeWithTransaction(EditorDOMPoint(aNode, offset), error);
newNode.forget(aNewLeftNode);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
return NS_OK;
}
already_AddRefed<nsIContent> EditorBase::SplitNodeWithTransaction(
const EditorDOMPoint& aStartOfRightNode, ErrorResult& aError) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (NS_WARN_IF(!aStartOfRightNode.IsSet()) ||
NS_WARN_IF(!aStartOfRightNode.GetContainerAsContent())) {
aError.Throw(NS_ERROR_INVALID_ARG);
return nullptr;
}
MOZ_ASSERT(aStartOfRightNode.IsSetAndValid());
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eSplitNode, nsIEditor::eNext);
// XXX Unfortunately, storing offset of the split point in
// SplitNodeTransaction is necessary for now. We should fix this
// in a follow up bug.
Unused << aStartOfRightNode.Offset();
RefPtr<SplitNodeTransaction> transaction =
SplitNodeTransaction::Create(*this, aStartOfRightNode);
aError = DoTransactionInternal(transaction);
nsCOMPtr<nsIContent> newNode = transaction->GetNewNode();
NS_WARNING_ASSERTION(newNode, "Failed to create a new left node");
// XXX Some other transactions manage range updater by themselves.
// Why doesn't SplitNodeTransaction do it?
RangeUpdaterRef().SelAdjSplitNode(*aStartOfRightNode.GetContainerAsContent(),
newNode);
if (mRules && mRules->AsHTMLEditRules() && newNode) {
RefPtr<HTMLEditRules> htmlEditRules = mRules->AsHTMLEditRules();
htmlEditRules->DidSplitNode(*aStartOfRightNode.GetContainer(), *newNode);
}
if (mInlineSpellChecker) {
RefPtr<mozInlineSpellChecker> spellChecker = mInlineSpellChecker;
spellChecker->DidSplitNode(aStartOfRightNode.GetContainer(), newNode);
}
if (!mActionListeners.IsEmpty()) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
listener->DidSplitNode(aStartOfRightNode.GetContainer(), newNode);
}
}
if (NS_WARN_IF(aError.Failed())) {
return nullptr;
}
return newNode.forget();
}
NS_IMETHODIMP
EditorBase::JoinNodes(nsINode* aLeftNode, nsINode* aRightNode, nsINode*) {
if (NS_WARN_IF(!aLeftNode) || NS_WARN_IF(!aRightNode) ||
NS_WARN_IF(!aLeftNode->GetParentNode())) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eJoinNodes);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = JoinNodesWithTransaction(*aLeftNode, *aRightNode);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult EditorBase::JoinNodesWithTransaction(nsINode& aLeftNode,
nsINode& aRightNode) {
MOZ_ASSERT(IsEditActionDataAvailable());
nsCOMPtr<nsINode> parent = aLeftNode.GetParentNode();
MOZ_ASSERT(parent);
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eJoinNodes, nsIEditor::ePrevious);
// Remember some values; later used for saved selection updating.
// Find the offset between the nodes to be joined.
int32_t offset = parent->ComputeIndexOf(&aRightNode);
// Find the number of children of the lefthand node
uint32_t oldLeftNodeLen = aLeftNode.Length();
if (mRules && mRules->AsHTMLEditRules()) {
RefPtr<HTMLEditRules> htmlEditRules = mRules->AsHTMLEditRules();
htmlEditRules->WillJoinNodes(aLeftNode, aRightNode);
}
nsresult rv = NS_OK;
RefPtr<JoinNodeTransaction> transaction =
JoinNodeTransaction::MaybeCreate(*this, aLeftNode, aRightNode);
if (transaction) {
rv = DoTransactionInternal(transaction);
}
// XXX Some other transactions manage range updater by themselves.
// Why doesn't JoinNodeTransaction do it?
RangeUpdaterRef().SelAdjJoinNodes(aLeftNode, aRightNode, *parent, offset,
static_cast<int32_t>(oldLeftNodeLen));
if (mRules && mRules->AsHTMLEditRules()) {
RefPtr<HTMLEditRules> htmlEditRules = mRules->AsHTMLEditRules();
htmlEditRules->DidJoinNodes(aLeftNode, aRightNode);
}
if (mInlineSpellChecker) {
RefPtr<mozInlineSpellChecker> spellChecker = mInlineSpellChecker;
spellChecker->DidJoinNodes(aLeftNode, aRightNode);
}
if (mTextServicesDocument && NS_SUCCEEDED(rv)) {
RefPtr<TextServicesDocument> textServicesDocument = mTextServicesDocument;
textServicesDocument->DidJoinNodes(aLeftNode, aRightNode);
}
if (!mActionListeners.IsEmpty()) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
listener->DidJoinNodes(&aLeftNode, &aRightNode, parent, rv);
}
}
return rv;
}
NS_IMETHODIMP
EditorBase::DeleteNode(nsINode* aNode) {
if (NS_WARN_IF(!aNode)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eRemoveNode);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = DeleteNodeWithTransaction(*aNode);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult EditorBase::DeleteNodeWithTransaction(nsINode& aNode) {
MOZ_ASSERT(IsEditActionDataAvailable());
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eDeleteNode, nsIEditor::ePrevious);
if (mRules && mRules->AsHTMLEditRules()) {
RefPtr<HTMLEditRules> htmlEditRules = mRules->AsHTMLEditRules();
htmlEditRules->WillDeleteNode(aNode);
}
// FYI: DeleteNodeTransaction grabs aNode while it's alive. So, it's safe
// to refer aNode even after calling DoTransaction().
RefPtr<DeleteNodeTransaction> deleteNodeTransaction =
DeleteNodeTransaction::MaybeCreate(*this, aNode);
nsresult rv = deleteNodeTransaction
? DoTransactionInternal(deleteNodeTransaction)
: NS_ERROR_FAILURE;
if (mTextServicesDocument && NS_SUCCEEDED(rv)) {
RefPtr<TextServicesDocument> textServicesDocument = mTextServicesDocument;
textServicesDocument->DidDeleteNode(&aNode);
}
if (!mActionListeners.IsEmpty()) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
listener->DidDeleteNode(&aNode, rv);
}
}
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
already_AddRefed<Element> EditorBase::ReplaceContainerWithTransactionInternal(
Element& aOldContainer, nsAtom& aTagName, nsAtom& aAttribute,
const nsAString& aAttributeValue, bool aCloneAllAttributes) {
MOZ_ASSERT(IsEditActionDataAvailable());
EditorDOMPoint atOldContainer(&aOldContainer);
if (NS_WARN_IF(!atOldContainer.IsSet())) {
return nullptr;
}
RefPtr<Element> newContainer = CreateHTMLContent(&aTagName);
if (NS_WARN_IF(!newContainer)) {
return nullptr;
}
// Set or clone attribute if needed.
if (aCloneAllAttributes) {
MOZ_ASSERT(&aAttribute == nsGkAtoms::_empty);
CloneAttributesWithTransaction(*newContainer, aOldContainer);
} else if (&aAttribute != nsGkAtoms::_empty) {
nsresult rv = newContainer->SetAttr(kNameSpaceID_None, &aAttribute,
aAttributeValue, true);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
}
// Notify our internal selection state listener.
// Note: An AutoSelectionRestorer object must be created before calling this
// to initialize RangeUpdaterRef().
AutoReplaceContainerSelNotify selStateNotify(RangeUpdaterRef(),
&aOldContainer, newContainer);
{
AutoTransactionsConserveSelection conserveSelection(*this);
// Move all children from the old container to the new container.
while (aOldContainer.HasChildren()) {
nsCOMPtr<nsIContent> child = aOldContainer.GetFirstChild();
if (NS_WARN_IF(!child)) {
return nullptr;
}
nsresult rv = DeleteNodeWithTransaction(*child);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
rv = InsertNodeWithTransaction(
*child, EditorDOMPoint(newContainer, newContainer->Length()));
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
}
}
// Insert new container into tree.
NS_WARNING_ASSERTION(atOldContainer.IsSetAndValid(),
"The old container might be moved by mutation observer");
nsresult rv = InsertNodeWithTransaction(*newContainer, atOldContainer);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
// Delete old container.
rv = DeleteNodeWithTransaction(aOldContainer);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
return newContainer.forget();
}
nsresult EditorBase::RemoveContainerWithTransaction(Element& aElement) {
MOZ_ASSERT(IsEditActionDataAvailable());
EditorDOMPoint pointToInsertChildren(&aElement);
if (NS_WARN_IF(!pointToInsertChildren.IsSet())) {
return NS_ERROR_FAILURE;
}
// Notify our internal selection state listener.
AutoRemoveContainerSelNotify selNotify(
RangeUpdaterRef(), &aElement, pointToInsertChildren.GetContainer(),
pointToInsertChildren.Offset(), aElement.GetChildCount());
// Move all children from aNode to its parent.
while (aElement.HasChildren()) {
nsCOMPtr<nsIContent> child = aElement.GetLastChild();
if (NS_WARN_IF(!child)) {
return NS_ERROR_FAILURE;
}
nsresult rv = DeleteNodeWithTransaction(*child);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Insert the last child before the previous last child. So, we need to
// use offset here because previous child might have been moved to
// container.
rv = InsertNodeWithTransaction(
*child, EditorDOMPoint(pointToInsertChildren.GetContainer(),
pointToInsertChildren.Offset()));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
nsresult rv = DeleteNodeWithTransaction(aElement);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
already_AddRefed<Element> EditorBase::InsertContainerWithTransactionInternal(
nsIContent& aContent, nsAtom& aTagName, nsAtom& aAttribute,
const nsAString& aAttributeValue) {
EditorDOMPoint pointToInsertNewContainer(&aContent);
if (NS_WARN_IF(!pointToInsertNewContainer.IsSet())) {
return nullptr;
}
// aContent will be moved to the new container before inserting the new
// container. So, when we insert the container, the insertion point
// is before the next sibling of aContent.
// XXX If pointerToInsertNewContainer stores offset here, the offset and
// referring child node become mismatched. Although, currently this
// is not a problem since InsertNodeTransaction refers only child node.
DebugOnly<bool> advanced = pointToInsertNewContainer.AdvanceOffset();
NS_WARNING_ASSERTION(advanced, "Failed to advance offset to after aContent");
// Create new container.
RefPtr<Element> newContainer = CreateHTMLContent(&aTagName);
if (NS_WARN_IF(!newContainer)) {
return nullptr;
}
// Set attribute if needed.
if (&aAttribute != nsGkAtoms::_empty) {
nsresult rv = newContainer->SetAttr(kNameSpaceID_None, &aAttribute,
aAttributeValue, true);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
}
// Notify our internal selection state listener
AutoInsertContainerSelNotify selNotify(RangeUpdaterRef());
// Put aNode in the new container, first.
nsresult rv = DeleteNodeWithTransaction(aContent);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
{
AutoTransactionsConserveSelection conserveSelection(*this);
rv = InsertNodeWithTransaction(aContent, EditorDOMPoint(newContainer, 0));
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
}
// Put the new container where aNode was.
rv = InsertNodeWithTransaction(*newContainer, pointToInsertNewContainer);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
return newContainer.forget();
}
nsresult EditorBase::MoveNodeWithTransaction(
nsIContent& aContent, const EditorDOMPoint& aPointToInsert) {
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
EditorDOMPoint oldPoint(&aContent);
if (NS_WARN_IF(!oldPoint.IsSet())) {
return NS_ERROR_FAILURE;
}
// Don't do anything if it's already in right place.
if (aPointToInsert == oldPoint) {
return NS_OK;
}
// Notify our internal selection state listener
AutoMoveNodeSelNotify selNotify(RangeUpdaterRef(), oldPoint, aPointToInsert);
// Hold a reference so aNode doesn't go away when we remove it (bug 772282)
nsresult rv = DeleteNodeWithTransaction(aContent);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Mutation event listener could break insertion point. Let's check it.
EditorDOMPoint pointToInsert(selNotify.ComputeInsertionPoint());
if (NS_WARN_IF(!pointToInsert.IsSet())) {
return NS_ERROR_FAILURE;
}
// If some children have removed from the container, let's append to the
// container.
// XXX Perhaps, if mutation event listener inserts or removes some children
// but the child node referring with aPointToInsert is still available,
// we should insert aContent before it. However, we should keep
// traditional behavior for now.
if (NS_WARN_IF(!pointToInsert.IsSetAndValid())) {
pointToInsert.SetToEndOf(pointToInsert.GetContainer());
}
rv = InsertNodeWithTransaction(aContent, pointToInsert);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
void EditorBase::MoveAllChildren(nsINode& aContainer,
const EditorRawDOMPoint& aPointToInsert,
ErrorResult& aError) {
if (!aContainer.HasChildren()) {
return;
}
nsIContent* firstChild = aContainer.GetFirstChild();
if (NS_WARN_IF(!firstChild)) {
aError.Throw(NS_ERROR_FAILURE);
return;
}
nsIContent* lastChild = aContainer.GetLastChild();
if (NS_WARN_IF(!lastChild)) {
aError.Throw(NS_ERROR_FAILURE);
return;
}
return MoveChildren(*firstChild, *lastChild, aPointToInsert, aError);
}
void EditorBase::MovePreviousSiblings(nsIContent& aChild,
const EditorRawDOMPoint& aPointToInsert,
ErrorResult& aError) {
if (NS_WARN_IF(!aChild.GetParentNode())) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
nsIContent* firstChild = aChild.GetParentNode()->GetFirstChild();
if (NS_WARN_IF(!firstChild)) {
aError.Throw(NS_ERROR_FAILURE);
return;
}
nsIContent* lastChild =
&aChild == firstChild ? firstChild : aChild.GetPreviousSibling();
if (NS_WARN_IF(!lastChild)) {
aError.Throw(NS_ERROR_FAILURE);
return;
}
return MoveChildren(*firstChild, *lastChild, aPointToInsert, aError);
}
void EditorBase::MoveChildren(nsIContent& aFirstChild, nsIContent& aLastChild,
const EditorRawDOMPoint& aPointToInsert,
ErrorResult& aError) {
nsCOMPtr<nsINode> oldContainer = aFirstChild.GetParentNode();
if (NS_WARN_IF(oldContainer != aLastChild.GetParentNode()) ||
NS_WARN_IF(!aPointToInsert.IsSet()) ||
NS_WARN_IF(!aPointToInsert.CanContainerHaveChildren())) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
// First, store all children which should be moved to the new container.
AutoTArray<nsCOMPtr<nsIContent>, 10> children;
for (nsIContent* child = &aFirstChild; child;
child = child->GetNextSibling()) {
children.AppendElement(child);
if (child == &aLastChild) {
break;
}
}
if (NS_WARN_IF(children.LastElement() != &aLastChild)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
nsCOMPtr<nsINode> newContainer = aPointToInsert.GetContainer();
nsCOMPtr<nsIContent> nextNode = aPointToInsert.GetChild();
for (size_t i = children.Length(); i > 0; --i) {
nsCOMPtr<nsIContent>& child = children[i - 1];
if (child->GetParentNode() != oldContainer) {
// If the child has been moved to different container, we shouldn't
// touch it.
continue;
}
oldContainer->RemoveChild(*child, aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
if (nextNode) {
// If we're not appending the children to the new container, we should
// check if referring next node of insertion point is still in the new
// container.
EditorRawDOMPoint pointToInsert(nextNode);
if (NS_WARN_IF(!pointToInsert.IsSet()) ||
NS_WARN_IF(pointToInsert.GetContainer() != newContainer)) {
// The next node of insertion point has been moved by mutation observer.
// Let's stop moving the remaining nodes.
// XXX Or should we move remaining children after the last moved child?
aError.Throw(NS_ERROR_FAILURE);
return;
}
}
newContainer->InsertBefore(*child, nextNode, aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
// If the child was inserted or appended properly, the following children
// should be inserted before it. Otherwise, keep using current position.
if (child->GetParentNode() == newContainer) {
nextNode = child;
}
}
}
NS_IMETHODIMP
EditorBase::AddEditorObserver(nsIEditorObserver* aObserver) {
// we don't keep ownership of the observers. They must
// remove themselves as observers before they are destroyed.
NS_ENSURE_TRUE(aObserver, NS_ERROR_NULL_POINTER);
// Make sure the listener isn't already on the list
if (!mEditorObservers.Contains(aObserver)) {
mEditorObservers.AppendElement(*aObserver);
NS_WARNING_ASSERTION(
mEditorObservers.Length() != 1,
"nsIEditorObserver installed, this editor becomes slower");
}
return NS_OK;
}
NS_IMETHODIMP
EditorBase::RemoveEditorObserver(nsIEditorObserver* aObserver) {
NS_ENSURE_TRUE(aObserver, NS_ERROR_FAILURE);
NS_WARNING_ASSERTION(
mEditorObservers.Length() != 1,
"All nsIEditorObservers have been removed, this editor becomes faster");
mEditorObservers.RemoveElement(aObserver);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::NotifySelectionChanged(Document* aDocument, Selection* aSelection,
int16_t aReason) {
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) {
switch (aNotification) {
case eNotifyEditorObserversOfEnd:
mIsInEditSubAction = false;
if (mTextInputListener) {
RefPtr<TextInputListener> listener = mTextInputListener;
listener->OnEditActionHandled();
}
if (mIMEContentObserver) {
RefPtr<IMEContentObserver> observer = mIMEContentObserver;
observer->OnEditActionHandled();
}
if (!mEditorObservers.IsEmpty()) {
// Copy the observers since EditAction()s can modify mEditorObservers.
AutoEditorObserverArray observers(mEditorObservers);
for (auto& observer : observers) {
observer->EditAction();
}
}
if (!mDispatchInputEvent) {
return;
}
FireInputEvent();
break;
case eNotifyEditorObserversOfBefore:
if (NS_WARN_IF(mIsInEditSubAction)) {
break;
}
mIsInEditSubAction = true;
if (mIMEContentObserver) {
RefPtr<IMEContentObserver> observer = mIMEContentObserver;
observer->BeforeEditAction();
}
break;
case eNotifyEditorObserversOfCancel:
mIsInEditSubAction = false;
if (mIMEContentObserver) {
RefPtr<IMEContentObserver> observer = mIMEContentObserver;
observer->CancelEditAction();
}
break;
default:
MOZ_CRASH("Handle all notifications here");
break;
}
}
void EditorBase::FireInputEvent() {
RefPtr<DataTransfer> dataTransfer = GetInputEventDataTransfer();
FireInputEvent(GetEditAction(), GetInputEventData(), dataTransfer);
}
void EditorBase::FireInputEvent(EditAction aEditAction, const nsAString& aData,
DataTransfer* aDataTransfer) {
MOZ_ASSERT(IsEditActionDataAvailable());
// 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<TextEditor> textEditor = AsTextEditor();
DebugOnly<nsresult> rvIgnored = nsContentUtils::DispatchInputEvent(
targetElement, ToInputType(aEditAction), textEditor,
aDataTransfer ? nsContentUtils::InputEventOptions(aDataTransfer)
: nsContentUtils::InputEventOptions(aData));
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"Failed to dispatch input event");
}
NS_IMETHODIMP
EditorBase::AddEditActionListener(nsIEditActionListener* aListener) {
NS_ENSURE_TRUE(aListener, NS_ERROR_NULL_POINTER);
// 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) {
NS_ENSURE_TRUE(aListener, NS_ERROR_FAILURE);
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) {
NS_ENSURE_TRUE(aListener, NS_ERROR_NULL_POINTER);
if (!mDocStateListeners.Contains(aListener)) {
mDocStateListeners.AppendElement(*aListener);
}
return NS_OK;
}
NS_IMETHODIMP
EditorBase::RemoveDocumentStateListener(nsIDocumentStateListener* aListener) {
NS_ENSURE_TRUE(aListener, NS_ERROR_NULL_POINTER);
mDocStateListeners.RemoveElement(aListener);
return NS_OK;
}
NS_IMETHODIMP
EditorBase::OutputToString(const nsAString& aFormatType, uint32_t aFlags,
nsAString& aOutputString) {
// these should be implemented by derived classes.
return NS_ERROR_NOT_IMPLEMENTED;
}
bool EditorBase::ArePreservingSelection() {
return IsEditActionDataAvailable() && !SavedSelectionRef().IsEmpty();
}
void EditorBase::PreserveSelectionAcrossActions() {
MOZ_ASSERT(IsEditActionDataAvailable());
SavedSelectionRef().SaveSelection(SelectionRefPtr());
RangeUpdaterRef().RegisterSelectionState(SavedSelectionRef());
}
nsresult EditorBase::RestorePreservedSelection() {
MOZ_ASSERT(IsEditActionDataAvailable());
if (SavedSelectionRef().IsEmpty()) {
return NS_ERROR_FAILURE;
}
SavedSelectionRef().RestoreSelection(SelectionRefPtr());
StopPreservingSelection();
return NS_OK;
}
void EditorBase::StopPreservingSelection() {
MOZ_ASSERT(IsEditActionDataAvailable());
RangeUpdaterRef().DropSelectionState(SavedSelectionRef());
SavedSelectionRef().MakeEmpty();
}
NS_IMETHODIMP
EditorBase::ForceCompositionEnd() { return CommitComposition(); }
nsresult EditorBase::CommitComposition() {
nsPresContext* pc = GetPresContext();
if (!pc) {
return NS_ERROR_NOT_AVAILABLE;
}
return mComposition
? IMEStateManager::NotifyIME(REQUEST_TO_COMMIT_COMPOSITION, pc)
: NS_OK;
}
nsresult EditorBase::GetPreferredIMEState(IMEState* aState) {
NS_ENSURE_ARG_POINTER(aState);
aState->mEnabled = IMEState::ENABLED;
aState->mOpen = IMEState::DONT_CHANGE_OPEN_STATE;
if (IsReadonly() || IsDisabled()) {
aState->mEnabled = IMEState::DISABLED;
return NS_OK;
}
nsCOMPtr<nsIContent> content = GetRoot();
NS_ENSURE_TRUE(content, NS_ERROR_FAILURE);
nsIFrame* frame = content->GetPrimaryFrame();
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
switch (frame->StyleUIReset()->mIMEMode) {
case NS_STYLE_IME_MODE_AUTO:
if (IsPasswordEditor()) aState->mEnabled = IMEState::PASSWORD;
break;
case NS_STYLE_IME_MODE_DISABLED:
// we should use password state for |ime-mode: disabled;|.
aState->mEnabled = IMEState::PASSWORD;
break;
case NS_STYLE_IME_MODE_ACTIVE:
aState->mOpen = IMEState::OPEN;
break;
case NS_STYLE_IME_MODE_INACTIVE:
aState->mOpen = IMEState::CLOSED;
break;
}
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetComposing(bool* aResult) {
NS_ENSURE_ARG_POINTER(aResult);
*aResult = IsIMEComposing();
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetRootElement(Element** aRootElement) {
NS_ENSURE_ARG_POINTER(aRootElement);
NS_ENSURE_TRUE(mRootElement, NS_ERROR_NOT_AVAILABLE);
RefPtr<Element> rootElement = mRootElement;
rootElement.forget(aRootElement);
return NS_OK;
}
void EditorBase::OnStartToHandleTopLevelEditSubAction(
EditSubAction aEditSubAction, nsIEditor::EDirection aDirection) {
MOZ_ASSERT(IsEditActionDataAvailable());
mEditActionData->SetTopLevelEditSubAction(aEditSubAction, aDirection);
}
void EditorBase::OnEndHandlingTopLevelEditSubAction() {
MOZ_ASSERT(IsEditActionDataAvailable());
mEditActionData->SetTopLevelEditSubAction(EditSubAction::eNone, eNone);
}
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 (NS_WARN_IF(aRv.Failed())) {
return;
}
if (!AsHTMLEditor() && !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 (!AsHTMLEditor() && aCount > 0) {
AsTextEditor()->WillDeleteText(aText.TextLength(), aOffset, aCount);
}
aText.DeleteData(aOffset, aCount, aRv);
NS_WARNING_ASSERTION(!aRv.Failed(), "Text::DeleteData() failed");
if (NS_WARN_IF(Destroyed())) {
aRv = NS_ERROR_EDITOR_DESTROYED;
}
}
void EditorBase::DoReplaceText(Text& aText, uint32_t aOffset, uint32_t aCount,
const nsAString& aStringToInsert,
ErrorResult& aRv) {
if (!AsHTMLEditor() && aCount > 0) {
AsTextEditor()->WillDeleteText(aText.TextLength(), aOffset, aCount);
}
aText.ReplaceData(aOffset, aCount, aStringToInsert, aRv);
NS_WARNING_ASSERTION(!aRv.Failed(), "Text::ReplaceData() failed");
if (NS_WARN_IF(Destroyed())) {
aRv = NS_ERROR_EDITOR_DESTROYED;
}
if (NS_WARN_IF(aRv.Failed())) {
return;
}
if (!AsHTMLEditor() && !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 (!AsHTMLEditor()) {
uint32_t length = aText.TextLength();
if (length > 0) {
AsTextEditor()->WillDeleteText(length, 0, length);
}
}
aText.SetData(aStringToSet, aRv);
NS_WARNING_ASSERTION(!aRv.Failed(), "Text::SetData() failed");
if (NS_WARN_IF(Destroyed())) {
aRv = NS_ERROR_EDITOR_DESTROYED;
return;
}
if (NS_WARN_IF(aRv.Failed())) {
return;
}
if (!AsHTMLEditor() && !aStringToSet.IsEmpty()) {
aRv = MOZ_KnownLive(AsTextEditor())
->DidInsertText(aText.Length(), 0, aStringToSet.Length());
NS_WARNING_ASSERTION(!aRv.Failed(), "TextEditor::DidInsertText() failed");
}
}
NS_IMETHODIMP
EditorBase::CloneAttribute(const nsAString& aAttribute, Element* aDestElement,
Element* aSourceElement) {
NS_ENSURE_TRUE(aDestElement && aSourceElement, NS_ERROR_NULL_POINTER);
if (NS_WARN_IF(aAttribute.IsEmpty())) {
return NS_ERROR_FAILURE;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eSetAttribute);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<nsAtom> attribute = NS_Atomize(aAttribute);
nsresult rv =
CloneAttributeWithTransaction(*attribute, *aDestElement, *aSourceElement);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult EditorBase::CloneAttributeWithTransaction(nsAtom& aAttribute,
Element& aDestElement,
Element& aSourceElement) {
nsAutoString attrValue;
if (aSourceElement.GetAttr(kNameSpaceID_None, &aAttribute, attrValue)) {
return SetAttributeWithTransaction(aDestElement, aAttribute, attrValue);
}
return RemoveAttributeWithTransaction(aDestElement, aAttribute);
}
/**
* @param aDest Must be a DOM element.
* @param aSource Must be a DOM element.
*/
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);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
CloneAttributesWithTransaction(*aDestElement, *aSourceElement);
return NS_OK;
}
void EditorBase::CloneAttributesWithTransaction(Element& aDestElement,
Element& aSourceElement) {
AutoPlaceholderBatch treatAsOneTransaction(*this);
// 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) {
RemoveAttributeWithTransaction(
destElement, MOZ_KnownLive(*attr->NodeInfo()->NameAtom()));
} else {
destElement->UnsetAttr(kNameSpaceID_None, attr->NodeInfo()->NameAtom(),
true);
}
}
// 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) {
SetAttributeOrEquivalent(destElement,
MOZ_KnownLive(attr->NodeInfo()->NameAtom()),
value, false);
} else {
// The element is not inserted in the document yet, we don't want to put
// a transaction on the UndoStack
SetAttributeOrEquivalent(destElement,
MOZ_KnownLive(attr->NodeInfo()->NameAtom()),
value, true);
}
}
}
nsresult EditorBase::ScrollSelectionIntoView(bool aScrollToAnchor) {
nsISelectionController* selectionController = GetSelectionController();
if (!selectionController) {
return NS_OK;
}
int16_t region = nsISelectionController::SELECTION_FOCUS_REGION;
if (aScrollToAnchor) {
region = nsISelectionController::SELECTION_ANCHOR_REGION;
}
selectionController->ScrollSelectionIntoView(
nsISelectionController::SELECTION_NORMAL, region,
nsISelectionController::SCROLL_OVERFLOW_HIDDEN);
return NS_OK;
}
EditorRawDOMPoint EditorBase::FindBetterInsertionPoint(
const EditorRawDOMPoint& aPoint) {
if (NS_WARN_IF(!aPoint.IsSet())) {
return aPoint;
}
MOZ_ASSERT(aPoint.IsSetAndValid());
if (aPoint.IsInTextNode()) {
// There is no "better" insertion point.
return aPoint;
}
if (!IsPlaintextEditor()) {
// 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 HTMLEditRules.
return aPoint;
}
nsCOMPtr<nsINode> root = GetRoot();
if (aPoint.GetContainer() == root) {
// 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 EditorRawDOMPoint(aPoint.GetContainer()->GetFirstChild(), 0);
}
// In some other cases, aNode is the anonymous DIV, and offset points to the
// terminating mozBR. In that case, we'll adjust aInOutNode and
// aInOutOffset to the preceding text node, if any.
if (!aPoint.IsStartOfContainer()) {
if (AsHTMLEditor()) {
// Fall back to a slow path that uses GetChildAt_Deprecated() for
// Thunderbird's plaintext editor.
nsIContent* child = aPoint.GetPreviousSiblingOfChild();
if (child && child->IsText()) {
if (NS_WARN_IF(child->Length() > INT32_MAX)) {
return aPoint;
}
return EditorRawDOMPoint(child, child->Length());
}
} 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()) {
if (NS_WARN_IF(child->Length() > INT32_MAX)) {
return aPoint;
}
return EditorRawDOMPoint(child, child->Length());
}
child = child->GetPreviousSibling();
}
}
}
}
// Sometimes, aNode is the mozBR 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 (TextEditUtils::IsMozBR(aPoint.GetContainer()) &&
aPoint.IsStartOfContainer()) {
nsIContent* previousSibling = aPoint.GetContainer()->GetPreviousSibling();
if (previousSibling && previousSibling->IsText()) {
if (NS_WARN_IF(previousSibling->Length() > INT32_MAX)) {
return aPoint;
}
return EditorRawDOMPoint(previousSibling, previousSibling->Length());
}
nsINode* parentOfContainer = aPoint.GetContainer()->GetParentNode();
if (parentOfContainer && parentOfContainer == root) {
return EditorRawDOMPoint(parentOfContainer,
aPoint.GetContainerAsContent(), 0);
}
}
return aPoint;
}
nsresult EditorBase::InsertTextWithTransaction(
Document& aDocument, const nsAString& aStringToInsert,
const EditorRawDOMPoint& aPointToInsert,
EditorRawDOMPoint* aPointAfterInsertedString) {
MOZ_ASSERT(
ShouldHandleIMEComposition() || !AllowsTransactionsToChangeSelection(),
"caller must have already used AutoTransactionsConserveSelection "
"if this is not for updating composition string");
if (NS_WARN_IF(!aPointToInsert.IsSet())) {
return NS_ERROR_INVALID_ARG;
}
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
if (!ShouldHandleIMEComposition() && aStringToInsert.IsEmpty()) {
if (aPointAfterInsertedString) {
*aPointAfterInsertedString = aPointToInsert;
}
return NS_OK;
}
// This method doesn't support over INT32_MAX length text since aInOutOffset
// is int32_t*.
CheckedInt<int32_t> lengthToInsert(aStringToInsert.Length());
if (NS_WARN_IF(!lengthToInsert.isValid())) {
return NS_ERROR_INVALID_ARG;
}
// In some cases, the node may be the anonymous div elemnt or a mozBR
// element. 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()) {
CheckedInt<int32_t> newOffset;
if (!pointToInsert.IsInTextNode()) {
// create a text node
RefPtr<nsTextNode> newNode = CreateTextNode(EmptyString());
if (NS_WARN_IF(!newNode)) {
return NS_ERROR_FAILURE;
}
// then we insert it into the dom tree
nsresult rv = InsertNodeWithTransaction(*newNode, pointToInsert);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
pointToInsert.Set(newNode, 0);
newOffset = lengthToInsert;
} else {
newOffset = lengthToInsert + pointToInsert.Offset();
NS_ENSURE_TRUE(newOffset.isValid(), NS_ERROR_FAILURE);
}
nsresult rv = InsertTextIntoTextNodeWithTransaction(
aStringToInsert, MOZ_KnownLive(*pointToInsert.GetContainerAsText()),
pointToInsert.Offset());
NS_ENSURE_SUCCESS(rv, rv);
if (aPointAfterInsertedString) {
aPointAfterInsertedString->Set(pointToInsert.GetContainer(),
newOffset.value());
}
return NS_OK;
}
if (pointToInsert.IsInTextNode()) {
CheckedInt<int32_t> newOffset = lengthToInsert + pointToInsert.Offset();
NS_ENSURE_TRUE(newOffset.isValid(), NS_ERROR_FAILURE);
// we are inserting text into an existing text node.
nsresult rv = InsertTextIntoTextNodeWithTransaction(
aStringToInsert, MOZ_KnownLive(*pointToInsert.GetContainerAsText()),
pointToInsert.Offset());
NS_ENSURE_SUCCESS(rv, rv);
if (aPointAfterInsertedString) {
aPointAfterInsertedString->Set(pointToInsert.GetContainer(),
newOffset.value());
}
return NS_OK;
}
// 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> newNode = CreateTextNode(aStringToInsert);
if (NS_WARN_IF(!newNode)) {
return NS_ERROR_FAILURE;
}
// then we insert it into the dom tree
nsresult rv = InsertNodeWithTransaction(*newNode, pointToInsert);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (aPointAfterInsertedString) {
aPointAfterInsertedString->Set(newNode, lengthToInsert.value());
}
return NS_OK;
}
nsresult EditorBase::InsertTextIntoTextNodeWithTransaction(
const nsAString& aStringToInsert, Text& aTextNode, int32_t aOffset,
bool aSuppressIME) {
MOZ_ASSERT(IsEditActionDataAvailable());
RefPtr<EditTransactionBase> transaction;
bool isIMETransaction = false;
RefPtr<Text> insertedTextNode = &aTextNode;
int32_t insertedOffset = aOffset;
// aSuppressIME is used when editor must insert text, yet this text is not
// part of the current IME operation. Example: adjusting whitespace around an
// IME insertion.
if (ShouldHandleIMEComposition() && !aSuppressIME) {
transaction = CompositionTransaction::Create(*this, aStringToInsert,
aTextNode, aOffset);
isIMETransaction = true;
// All characters of the composition string will be replaced with
// aStringToInsert. So, we need to emulate to remove the composition
// string.
// FYI: The text node information in mComposition has been updated by
// CompositionTransaction::Create().
insertedTextNode = mComposition->GetContainerTextNode();
insertedOffset = mComposition->XPOffsetInTextNode();
} else {
transaction = InsertTextTransaction::Create(*this, aStringToInsert,
aTextNode, aOffset);
}
// XXX We may not need these view batches anymore. This is handled at a
// higher level now I believe.
BeginUpdateViewBatch();
nsresult rv = DoTransactionInternal(transaction);
EndUpdateViewBatch();
if (mRules && mRules->AsHTMLEditRules() && insertedTextNode) {
RefPtr<HTMLEditRules> htmlEditRules = mRules->AsHTMLEditRules();
htmlEditRules->DidInsertText(*insertedTextNode, insertedOffset,
aStringToInsert);
}
// let listeners know what happened
if (!mActionListeners.IsEmpty()) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
listener->DidInsertText(insertedTextNode, insertedOffset, aStringToInsert,
rv);
}
}
// 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 (isIMETransaction && mComposition) {
RefPtr<Text> textNode = mComposition->GetContainerTextNode();
if (textNode && !textNode->Length()) {
DeleteNodeWithTransaction(*textNode);
mComposition->OnTextNodeRemoved();
static_cast<CompositionTransaction*>(transaction.get())->MarkFixed();
}
}
return rv;
}
nsINode* EditorBase::GetFirstEditableNode(nsINode* aRoot) {
MOZ_ASSERT(aRoot);
nsIContent* node = GetLeftmostChild(aRoot);
if (node && !IsEditable(node)) {
node = GetNextEditableNode(*node);
}
return (node != aRoot) ? node : nullptr;
}
nsresult EditorBase::NotifyDocumentListeners(
TDocumentListenerNotification aNotificationType) {
if (!mDocStateListeners.Length()) {
// Maybe there just aren't any.
return NS_OK;
}
AutoDocumentStateListenerArray listeners(mDocStateListeners);
nsresult rv = NS_OK;
switch (aNotificationType) {
case eDocumentCreated:
for (auto& listener : listeners) {
rv = listener->NotifyDocumentCreated();
if (NS_FAILED(rv)) {
break;
}
}
break;
case eDocumentToBeDestroyed:
for (auto& listener : listeners) {
rv = listener->NotifyDocumentWillBeDestroyed();
if (NS_FAILED(rv)) {
break;
}
}
break;
case eDocumentStateChanged: {
bool docIsDirty;
rv = GetDocumentModified(&docIsDirty);
NS_ENSURE_SUCCESS(rv, rv);
if (static_cast<int8_t>(docIsDirty) == mDocDirtyState) {
return NS_OK;
}
mDocDirtyState = docIsDirty;
for (auto& listener : listeners) {
rv = listener->NotifyDocumentStateChanged(mDocDirtyState);
if (NS_FAILED(rv)) {
break;
}
}
break;
}
default:
MOZ_ASSERT_UNREACHABLE("Unknown notification");
}
return rv;
}
nsresult EditorBase::SetTextImpl(const nsAString& aString, Text& aTextNode) {
MOZ_ASSERT(IsEditActionDataAvailable());
const uint32_t length = aTextNode.Length();
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eSetText, nsIEditor::eNext);
// Let listeners know what's up
if (!mActionListeners.IsEmpty() && length) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
listener->WillDeleteText(&aTextNode, 0, length);
}
}
// 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!
ErrorResult error;
DoSetText(aTextNode, aString, error);
nsresult rv = error.StealNSResult();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
{
// Create a nested scope to not overwrite rv from the outer scope.
DebugOnly<nsresult> rv =
SelectionRefPtr()->Collapse(&aTextNode, aString.Length());
NS_ASSERTION(NS_SUCCEEDED(rv),
"Selection could not be collapsed after insert");
}
RangeUpdaterRef().SelAdjDeleteText(&aTextNode, 0, length);
RangeUpdaterRef().SelAdjInsertText(aTextNode, 0, aString);
if (mRules && mRules->AsHTMLEditRules()) {
RefPtr<HTMLEditRules> htmlEditRules = mRules->AsHTMLEditRules();
if (length) {
htmlEditRules->DidDeleteText(aTextNode, 0, length);
}
if (!aString.IsEmpty()) {
htmlEditRules->DidInsertText(aTextNode, 0, aString);
}
}
// Let listeners know what happened
if (!mActionListeners.IsEmpty()) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
if (length) {
listener->DidDeleteText(&aTextNode, 0, length, rv);
}
if (!aString.IsEmpty()) {
listener->DidInsertText(&aTextNode, 0, aString, rv);
}
}
}
return rv;
}
nsresult EditorBase::DeleteTextWithTransaction(Text& aTextNode,
uint32_t aOffset,
uint32_t aLength) {
MOZ_ASSERT(IsEditActionDataAvailable());
RefPtr<DeleteTextTransaction> transaction =
DeleteTextTransaction::MaybeCreate(*this, aTextNode, aOffset, aLength);
if (NS_WARN_IF(!transaction)) {
return NS_ERROR_FAILURE;
}
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eDeleteText, nsIEditor::ePrevious);
// Let listeners know what's up
if (!mActionListeners.IsEmpty()) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
listener->WillDeleteText(&aTextNode, aOffset, aLength);
}
}
nsresult rv = DoTransactionInternal(transaction);
if (mRules && mRules->AsHTMLEditRules()) {
RefPtr<HTMLEditRules> htmlEditRules = mRules->AsHTMLEditRules();
htmlEditRules->DidDeleteText(aTextNode, aOffset, aLength);
}
// Let listeners know what happened
if (!mActionListeners.IsEmpty()) {
AutoActionListenerArray listeners(mActionListeners);
for (auto& listener : listeners) {
listener->DidDeleteText(&aTextNode, aOffset, aLength, rv);
}
}
return rv;
}
struct SavedRange final {
RefPtr<Selection> mSelection;
nsCOMPtr<nsINode> mStartContainer;
nsCOMPtr<nsINode> mEndContainer;
int32_t mStartOffset;
int32_t mEndOffset;
};
void EditorBase::DoSplitNode(const EditorDOMPoint& aStartOfRightNode,
nsIContent& aNewLeftNode, ErrorResult& aError) {
if (NS_WARN_IF(aError.Failed())) {
return;
}
// XXX Perhaps, aStartOfRightNode may be invalid if this is a redo
// operation after modifying DOM node with JS.
if (NS_WARN_IF(!aStartOfRightNode.IsSet())) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
MOZ_ASSERT(aStartOfRightNode.IsSetAndValid());
// Remember all selection points.
AutoTArray<SavedRange, 10> savedRanges;
for (SelectionType selectionType : kPresentSelectionTypes) {
SavedRange range;
range.mSelection = GetSelection(selectionType);
if (NS_WARN_IF(!range.mSelection &&
selectionType == SelectionType::eNormal)) {
aError.Throw(NS_ERROR_FAILURE);
return;
} else if (!range.mSelection) {
// For non-normal selections, skip over the non-existing ones.
continue;
}
for (uint32_t j = 0; j < range.mSelection->RangeCount(); ++j) {
RefPtr<nsRange> r = range.mSelection->GetRangeAt(j);
MOZ_ASSERT(r->IsPositioned());
// XXX Looks like that SavedRange should have mStart and mEnd which
// are RangeBoundary. Then, we can avoid to compute offset here.
range.mStartContainer = r->GetStartContainer();
range.mStartOffset = r->StartOffset();
range.mEndContainer = r->GetEndContainer();
range.mEndOffset = r->EndOffset();
savedRanges.AppendElement(range);
}
}
nsCOMPtr<nsINode> parent = aStartOfRightNode.GetContainer()->GetParentNode();
if (NS_WARN_IF(!parent)) {
aError.Throw(NS_ERROR_FAILURE);
return;
}
// Fix the child before mutation observer may touch the DOM tree.
nsIContent* firstChildOfRightNode = aStartOfRightNode.GetChild();
parent->InsertBefore(aNewLeftNode, aStartOfRightNode.GetContainer(), aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
// At this point, the existing right node has all the children. Move all
// the children which are before aStartOfRightNode.
if (!aStartOfRightNode.IsStartOfContainer()) {
// If it's a text node, just shuffle around some text
Text* rightAsText = aStartOfRightNode.GetContainerAsText();
Text* leftAsText = aNewLeftNode.GetAsText();
if (rightAsText && leftAsText) {
MOZ_DIAGNOSTIC_ASSERT(AsHTMLEditor(),
"Text node in TextEditor shouldn't be split");
// Fix right node
nsAutoString leftText;
rightAsText->SubstringData(0, aStartOfRightNode.Offset(), leftText,
IgnoreErrors());
// XXX This call may destroy us.
DoDeleteText(MOZ_KnownLive(*rightAsText), 0, aStartOfRightNode.Offset(),
IgnoreErrors());
// Fix left node
// XXX This call may destroy us.
DoSetText(MOZ_KnownLive(*leftAsText), leftText, IgnoreErrors());
} else {
MOZ_DIAGNOSTIC_ASSERT(!rightAsText && !leftAsText);
// Otherwise it's an interior node, so shuffle around the children. Go
// through list backwards so deletes don't interfere with the iteration.
if (!firstChildOfRightNode) {
MoveAllChildren(*aStartOfRightNode.GetContainer(),
EditorRawDOMPoint(&aNewLeftNode, 0), aError);
NS_WARNING_ASSERTION(
!aError.Failed(),
"Failed to move all children from the right node to the left node");
} else if (NS_WARN_IF(aStartOfRightNode.GetContainer() !=
firstChildOfRightNode->GetParentNode())) {
// firstChildOfRightNode has been moved by mutation observer.
// In this case, we what should we do? Use offset? But we cannot
// check if the offset is still expected.
} else {
MovePreviousSiblings(*firstChildOfRightNode,
EditorRawDOMPoint(&aNewLeftNode, 0), aError);
NS_WARNING_ASSERTION(!aError.Failed(),
"Failed to move some children from the right node "
"to the left node");
}
}
}
// XXX Why do we ignore an error while moving nodes from the right node to
// the left node?
aError.SuppressException();
// Handle selection
if (RefPtr<PresShell> presShell = GetPresShell()) {
presShell->FlushPendingNotifications(FlushType::Frames);
}
NS_WARNING_ASSERTION(!Destroyed(),
"The editor is destroyed during splitting a node");
bool allowedTransactionsToChangeSelection =
AllowsTransactionsToChangeSelection();
RefPtr<Selection> previousSelection;
for (size_t i = 0; i < savedRanges.Length(); ++i) {
// Adjust the selection if needed.
SavedRange& range = savedRanges[i];
// If we have not seen the selection yet, clear all of its ranges.
if (range.mSelection != previousSelection) {
range.mSelection->RemoveAllRanges(aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
previousSelection = range.mSelection;
}
// XXX Looks like that we don't need to modify normal selection here
// because selection will be modified by the caller if
// AllowsTransactionsToChangeSelection() will return true.
if (allowedTransactionsToChangeSelection &&
range.mSelection->Type() == SelectionType::eNormal) {
// If the editor should adjust the selection, don't bother restoring
// the ranges for the normal selection here.
continue;
}
// Split the selection into existing node and new node.
if (range.mStartContainer == aStartOfRightNode.GetContainer()) {
if (static_cast<uint32_t>(range.mStartOffset) <
aStartOfRightNode.Offset()) {
range.mStartContainer = &aNewLeftNode;
} else {
range.mStartOffset -= aStartOfRightNode.Offset();
}
}
if (range.mEndContainer == aStartOfRightNode.GetContainer()) {
if (static_cast<uint32_t>(range.mEndOffset) <
aStartOfRightNode.Offset()) {
range.mEndContainer = &aNewLeftNode;
} else {
range.mEndOffset -= aStartOfRightNode.Offset();
}
}
RefPtr<nsRange> newRange =
nsRange::Create(range.mStartContainer, range.mStartOffset,
range.mEndContainer, range.mEndOffset, aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
range.mSelection->AddRangeAndSelectFramesAndNotifyListeners(*newRange,
aError);
if (NS_WARN_IF(aError.Failed())) {
return;
}
}
// We don't need to set selection here because the caller should do that
// in any case.
// If splitting the node causes running mutation event listener and we've
// got unexpected result, we should return error because callers will
// continue to do their work without complicated DOM tree result.
// NOTE: Perhaps, we shouldn't do this immediately after each DOM tree change
// because stopping handling it causes some data loss. E.g., user
// may loose the text which is moved to the new text node.
// XXX We cannot check all descendants in the right node and the new left
// node for performance reason. I think that if caller needs to access
// some of the descendants, they should check by themselves.
if (NS_WARN_IF(parent != aStartOfRightNode.GetContainer()->GetParentNode()) ||
NS_WARN_IF(parent != aNewLeftNode.GetParentNode()) ||
NS_WARN_IF(aNewLeftNode.GetNextSibling() !=
aStartOfRightNode.GetContainer())) {
aError.Throw(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
}
nsresult EditorBase::DoJoinNodes(nsINode* aNodeToKeep, nsINode* aNodeToJoin,
nsINode* aParent) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_DIAGNOSTIC_ASSERT(AsHTMLEditor());
MOZ_ASSERT(aNodeToKeep);
MOZ_ASSERT(aNodeToJoin);
MOZ_ASSERT(aParent);
uint32_t firstNodeLength = aNodeToJoin->Length();
int32_t joinOffset;
GetNodeLocation(aNodeToJoin, &joinOffset);
int32_t keepOffset;
nsINode* parent = GetNodeLocation(aNodeToKeep, &keepOffset);
// Remember all selection points.
AutoTArray<SavedRange, 10> savedRanges;
for (SelectionType selectionType : kPresentSelectionTypes) {
SavedRange range;
range.mSelection = GetSelection(selectionType);
if (selectionType == SelectionType::eNormal) {
NS_ENSURE_TRUE(range.mSelection, NS_ERROR_NULL_POINTER);
} else if (!range.mSelection) {
// For non-normal selections, skip over the non-existing ones.
continue;
}
for (uint32_t j = 0; j < range.mSelection->RangeCount(); ++j) {
RefPtr<nsRange> r = range.mSelection->GetRangeAt(j);
MOZ_ASSERT(r->IsPositioned());
range.mStartContainer = r->GetStartContainer();
range.mStartOffset = r->StartOffset();
range.mEndContainer = r->GetEndContainer();
range.mEndOffset = r->EndOffset();
// If selection endpoint is between the nodes, remember it as being
// in the one that is going away instead. This simplifies later selection
// adjustment logic at end of this method.
if (range.mStartContainer) {
if (range.mStartContainer == parent &&
joinOffset < range.mStartOffset &&
range.mStartOffset <= keepOffset) {
range.mStartContainer = aNodeToJoin;
range.mStartOffset = firstNodeLength;
}
if (range.mEndContainer == parent && joinOffset < range.mEndOffset &&
range.mEndOffset <= keepOffset) {
range.mEndContainer = aNodeToJoin;
range.mEndOffset = firstNodeLength;
}
}
savedRanges.AppendElement(range);
}
}
// OK, ready to do join now.
// If it's a text node, just shuffle around some text.
if (IsTextNode(aNodeToKeep) && IsTextNode(aNodeToJoin)) {
nsAutoString rightText;
nsAutoString leftText;
aNodeToKeep->GetAsText()->GetData(rightText);
aNodeToJoin->GetAsText()->GetData(leftText);
leftText += rightText;
// XXX This call may destroy us.
DoSetText(MOZ_KnownLive(*aNodeToKeep->GetAsText()), leftText,
IgnoreErrors());
} else {
// Otherwise it's an interior node, so shuffle around the children.
nsCOMPtr<nsINodeList> childNodes = aNodeToJoin->ChildNodes();
MOZ_ASSERT(childNodes);
// Remember the first child in aNodeToKeep, we'll insert all the children of
// aNodeToJoin in front of it GetFirstChild returns nullptr firstNode if
// aNodeToKeep has no children, that's OK.
nsCOMPtr<nsIContent> firstNode = aNodeToKeep->GetFirstChild();
// Have to go through the list backwards to keep deletes from interfering
// with iteration.
for (uint32_t i = childNodes->Length(); i; --i) {
nsCOMPtr<nsIContent> childNode = childNodes->Item(i - 1);
if (childNode) {
// prepend children of aNodeToJoin
ErrorResult err;
aNodeToKeep->InsertBefore(*childNode, firstNode, err);
NS_ENSURE_TRUE(!err.Failed(), err.StealNSResult());
firstNode = childNode.forget();
}
}
}
// Delete the extra node.
ErrorResult err;
aParent->RemoveChild(*aNodeToJoin, err);
bool allowedTransactionsToChangeSelection =
AllowsTransactionsToChangeSelection();
RefPtr<Selection> previousSelection;
for (size_t i = 0; i < savedRanges.Length(); ++i) {
// And adjust the selection if needed.
SavedRange& range = savedRanges[i];
// If we have not seen the selection yet, clear all of its ranges.
if (range.mSelection != previousSelection) {
ErrorResult rv;
range.mSelection->RemoveAllRanges(rv);
if (NS_WARN_IF(rv.Failed())) {
return rv.StealNSResult();
}
previousSelection = range.mSelection;
}
if (allowedTransactionsToChangeSelection &&
range.mSelection->Type() == SelectionType::eNormal) {
// If the editor should adjust the selection, don't bother restoring
// the ranges for the normal selection here.
continue;
}
// Check to see if we joined nodes where selection starts.
if (range.mStartContainer == aNodeToJoin) {
range.mStartContainer = aNodeToKeep;
} else if (range.mStartContainer == aNodeToKeep) {
range.mStartOffset += firstNodeLength;
}
// Check to see if we joined nodes where selection ends.
if (range.mEndContainer == aNodeToJoin) {
range.mEndContainer = aNodeToKeep;
} else if (range.mEndContainer == aNodeToKeep) {
range.mEndOffset += firstNodeLength;
}
RefPtr<nsRange> newRange =
nsRange::Create(range.mStartContainer, range.mStartOffset,
range.mEndContainer, range.mEndOffset, IgnoreErrors());
if (NS_WARN_IF(!newRange)) {
return NS_ERROR_FAILURE;
}
ErrorResult err;
range.mSelection->AddRangeAndSelectFramesAndNotifyListeners(*newRange, err);
if (NS_WARN_IF(err.Failed())) {
return err.StealNSResult();
}
}
if (allowedTransactionsToChangeSelection) {
// Editor wants us to set selection at join point.
DebugOnly<nsresult> rv = SelectionRefPtr()->Collapse(
aNodeToKeep, AssertedCast<int32_t>(firstNodeLength));
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Failed to collapse Selection at end of the node");
}
return err.StealNSResult();
}
// static
int32_t EditorBase::GetChildOffset(nsINode* aChild, nsINode* aParent) {
MOZ_ASSERT(aChild);
MOZ_ASSERT(aParent);
// nsINode::ComputeIndexOf() is expensive. So, if we can return index
// without calling it, we should do that.
// If there is no previous siblings, it means that it's the first child.
if (aParent->GetFirstChild() == aChild) {
MOZ_ASSERT(aParent->ComputeIndexOf(aChild) == 0);
return 0;
}
// If there is no next siblings, it means that it's the last child.
if (aParent->GetLastChild() == aChild) {
int32_t lastChildIndex = static_cast<int32_t>(aParent->Length() - 1);
MOZ_ASSERT(aParent->ComputeIndexOf(aChild) == lastChildIndex);
return lastChildIndex;
}
int32_t index = aParent->ComputeIndexOf(aChild);
MOZ_ASSERT(index != -1);
return index;
}
// static
nsINode* EditorBase::GetNodeLocation(nsINode* aChild, int32_t* aOffset) {
MOZ_ASSERT(aChild);
MOZ_ASSERT(aOffset);
nsINode* parent = aChild->GetParentNode();
if (parent) {
*aOffset = GetChildOffset(aChild, parent);
MOZ_ASSERT(*aOffset != -1);
} else {
*aOffset = -1;
}
return parent;
}
nsIContent* EditorBase::GetPreviousNodeInternal(nsINode& aNode,
bool aFindEditableNode,
bool aFindAnyDataNode,
bool aNoBlockCrossing) {
if (!IsDescendantOfEditorRoot(&aNode)) {
return nullptr;
}
return FindNode(&aNode, false, aFindEditableNode, aFindAnyDataNode,
aNoBlockCrossing);
}
nsIContent* EditorBase::GetPreviousNodeInternal(const EditorRawDOMPoint& aPoint,
bool aFindEditableNode,
bool aFindAnyDataNode,
bool aNoBlockCrossing) {
MOZ_ASSERT(aPoint.IsSetAndValid());
NS_WARNING_ASSERTION(
!aPoint.IsInDataNode() || aPoint.IsInTextNode(),
"GetPreviousNodeInternal() doesn't assume that the start point is a "
"data node except text node");
// If we are at the beginning of the node, or it is a text node, then just
// look before it.
if (aPoint.IsStartOfContainer() || aPoint.IsInTextNode()) {
if (aNoBlockCrossing && IsBlockNode(aPoint.GetContainer())) {
// If we aren't allowed to cross blocks, don't look before this block.
return nullptr;
}
return GetPreviousNodeInternal(*aPoint.GetContainer(), aFindEditableNode,
aFindAnyDataNode, aNoBlockCrossing);
}
// else look before the child at 'aOffset'
if (aPoint.GetChild()) {
return GetPreviousNodeInternal(*aPoint.GetChild(), aFindEditableNode,
aFindAnyDataNode, aNoBlockCrossing);
}
// unless there isn't one, in which case we are at the end of the node
// and want the deep-right child.
nsIContent* rightMostNode =
GetRightmostChild(aPoint.GetContainer(), aNoBlockCrossing);
if (!rightMostNode) {
return nullptr;
}
if ((!aFindEditableNode || IsEditable(rightMostNode)) &&
(aFindAnyDataNode || IsElementOrText(*rightMostNode))) {
return rightMostNode;
}
// restart the search from the non-editable node we just found
return GetPreviousNodeInternal(*rightMostNode, aFindEditableNode,
aFindAnyDataNode, aNoBlockCrossing);
}
nsIContent* EditorBase::GetNextNodeInternal(nsINode& aNode,
bool aFindEditableNode,
bool aFindAnyDataNode,
bool aNoBlockCrossing) {
if (!IsDescendantOfEditorRoot(&aNode)) {
return nullptr;
}
return FindNode(&aNode, true, aFindEditableNode, aFindAnyDataNode,
aNoBlockCrossing);
}
nsIContent* EditorBase::GetNextNodeInternal(const EditorRawDOMPoint& aPoint,
bool aFindEditableNode,
bool aFindAnyDataNode,
bool aNoBlockCrossing) {
MOZ_ASSERT(aPoint.IsSetAndValid());
NS_WARNING_ASSERTION(
!aPoint.IsInDataNode() || aPoint.IsInTextNode(),
"GetNextNodeInternal() doesn't assume that the start point is a "
"data node except text node");
EditorRawDOMPoint point(aPoint);
// if the container is a text node, use its location instead
if (point.IsInTextNode()) {
point.Set(point.GetContainer());
bool advanced = point.AdvanceOffset();
if (NS_WARN_IF(!advanced)) {
return nullptr;
}
}
if (point.GetChild()) {
if (aNoBlockCrossing && IsBlockNode(point.GetChild())) {
return point.GetChild();
}
nsIContent* leftMostNode =
GetLeftmostChild(point.GetChild(), aNoBlockCrossing);
if (!leftMostNode) {
return point.GetChild();
}
if (!IsDescendantOfEditorRoot(leftMostNode)) {
return nullptr;
}
if ((!aFindEditableNode || IsEditable(leftMostNode)) &&
(aFindAnyDataNode || IsElementOrText(*leftMostNode))) {
return leftMostNode;
}
// restart the search from the non-editable node we just found
return GetNextNodeInternal(*leftMostNode, aFindEditableNode,
aFindAnyDataNode, aNoBlockCrossing);
}
// unless there isn't one, in which case we are at the end of the node
// and want the next one.
if (aNoBlockCrossing && IsBlockNode(point.GetContainer())) {
// don't cross out of parent block
return nullptr;
}
return GetNextNodeInternal(*point.GetContainer(), aFindEditableNode,
aFindAnyDataNode, aNoBlockCrossing);
}
nsIContent* EditorBase::FindNextLeafNode(nsINode* aCurrentNode, bool aGoForward,
bool bNoBlockCrossing) {
// called only by GetPriorNode so we don't need to check params.
MOZ_ASSERT(
IsDescendantOfEditorRoot(aCurrentNode) && !IsEditorRoot(aCurrentNode),
"Bogus arguments");
nsINode* cur = aCurrentNode;
for (;;) {
// if aCurrentNode has a sibling in the right direction, return
// that sibling's closest child (or itself if it has no children)
nsIContent* sibling =
aGoForward ? cur->GetNextSibling() : cur->GetPreviousSibling();
if (sibling) {
if (bNoBlockCrossing && IsBlockNode(sibling)) {
// don't look inside prevsib, since it is a block
return sibling;
}
nsIContent* leaf = aGoForward
? GetLeftmostChild(sibling, bNoBlockCrossing)
: GetRightmostChild(sibling, bNoBlockCrossing);
if (!leaf) {
return sibling;
}
return leaf;
}
nsINode* parent = cur->GetParentNode();
if (!parent) {
return nullptr;
}
NS_ASSERTION(IsDescendantOfEditorRoot(parent),
"We started with a proper descendant of root, and should stop "
"if we ever hit the root, so we better have a descendant of "
"root now!");
if (IsEditorRoot(parent) || (bNoBlockCrossing && IsBlockNode(parent))) {
return nullptr;
}
cur = parent;
}
MOZ_ASSERT_UNREACHABLE("What part of for(;;) do you not understand?");
return nullptr;
}
nsIContent* EditorBase::FindNode(nsINode* aCurrentNode, bool aGoForward,
bool aEditableNode, bool aFindAnyDataNode,
bool bNoBlockCrossing) {
if (IsEditorRoot(aCurrentNode)) {
// Don't allow traversal above the root node! This helps
// prevent us from accidentally editing browser content
// when the editor is in a text widget.
return nullptr;
}
nsCOMPtr<nsIContent> candidate =
FindNextLeafNode(aCurrentNode, aGoForward, bNoBlockCrossing);
if (!candidate) {
return nullptr;
}
if ((!aEditableNode || IsEditable(candidate)) &&
(aFindAnyDataNode || IsElementOrText(*candidate))) {
return candidate;
}
return FindNode(candidate, aGoForward, aEditableNode, aFindAnyDataNode,
bNoBlockCrossing);
}
nsIContent* EditorBase::GetRightmostChild(nsINode* aCurrentNode,
bool bNoBlockCrossing) {
NS_ENSURE_TRUE(aCurrentNode, nullptr);
nsIContent* cur = aCurrentNode->GetLastChild();
if (!cur) {
return nullptr;
}
for (;;) {
if (bNoBlockCrossing && IsBlockNode(cur)) {
return cur;
}
nsIContent* next = cur->GetLastChild();
if (!next) {
return cur;
}
cur = next;
}
MOZ_ASSERT_UNREACHABLE("What part of for(;;) do you not understand?");
return nullptr;
}
nsIContent* EditorBase::GetLeftmostChild(nsINode* aCurrentNode,
bool bNoBlockCrossing) {
NS_ENSURE_TRUE(aCurrentNode, nullptr);
nsIContent* cur = aCurrentNode->GetFirstChild();
if (!cur) {
return nullptr;
}
for (;;) {
if (bNoBlockCrossing && IsBlockNode(cur)) {
return cur;
}
nsIContent* next = cur->GetFirstChild();
if (!next) {
return cur;
}
cur = next;
}
MOZ_ASSERT_UNREACHABLE("What part of for(;;) do you not understand?");
return nullptr;
}
bool EditorBase::IsBlockNode(nsINode* aNode) {
// stub to be overridden in HTMLEditor.
// screwing around with the class hierarchy here in order
// to not duplicate the code in GetNextNode/GetPrevNode
// across both EditorBase/HTMLEditor.
return false;
}
bool EditorBase::CanContain(nsINode& aParent, nsIContent& aChild) const {
switch (aParent.NodeType()) {
case nsINode::ELEMENT_NODE:
case nsINode::DOCUMENT_FRAGMENT_NODE:
return TagCanContain(*aParent.NodeInfo()->NameAtom(), aChild);
}
return false;
}
bool EditorBase::CanContainTag(nsINode& aParent, nsAtom& aChildTag) const {
switch (aParent.NodeType()) {
case nsINode::ELEMENT_NODE:
case nsINode::DOCUMENT_FRAGMENT_NODE:
return TagCanContainTag(*aParent.NodeInfo()->NameAtom(), aChildTag);
}
return false;
}
bool EditorBase::TagCanContain(nsAtom& aParentTag, nsIContent& aChild) const {
switch (aChild.NodeType()) {
case nsINode::TEXT_NODE:
case nsINode::ELEMENT_NODE:
case nsINode::DOCUMENT_FRAGMENT_NODE:
return TagCanContainTag(aParentTag, *aChild.NodeInfo()->NameAtom());
}
return false;
}
bool EditorBase::TagCanContainTag(nsAtom& aParentTag, nsAtom& aChildTag) const {
return true;
}
bool EditorBase::IsRoot(nsINode* inNode) const {
if (NS_WARN_IF(!inNode)) {
return false;
}
nsINode* rootNode = GetRoot();
return inNode == rootNode;
}
bool EditorBase::IsEditorRoot(nsINode* aNode) const {
if (NS_WARN_IF(!aNode)) {
return false;
}
nsINode* rootNode = GetEditorRoot();
return aNode == rootNode;
}
bool EditorBase::IsDescendantOfRoot(nsINode* inNode) const {
if (NS_WARN_IF(!inNode)) {
return false;
}
nsIContent* root = GetRoot();
if (NS_WARN_IF(!root)) {
return false;
}
return inNode->IsInclusiveDescendantOf(root);
}
bool EditorBase::IsDescendantOfEditorRoot(nsINode* aNode) const {
if (NS_WARN_IF(!aNode)) {
return false;
}
nsIContent* root = GetEditorRoot();
if (NS_WARN_IF(!root)) {
return false;
}
return aNode->IsInclusiveDescendantOf(root);
}
bool EditorBase::IsContainer(nsINode* aNode) { return aNode ? true : false; }
uint32_t EditorBase::CountEditableChildren(nsINode* aNode) {
MOZ_ASSERT(aNode);
uint32_t count = 0;
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (IsEditable(child)) {
++count;
}
}
return count;
}
NS_IMETHODIMP
EditorBase::IncrementModificationCount(int32_t inNumMods) {
uint32_t oldModCount = mModCount;
mModCount += inNumMods;
if ((!oldModCount && mModCount) || (oldModCount && !mModCount)) {
NotifyDocumentListeners(eDocumentStateChanged);
}
return NS_OK;
}
NS_IMETHODIMP
EditorBase::GetModificationCount(int32_t* outModCount) {
NS_ENSURE_ARG_POINTER(outModCount);
*outModCount = mModCount;
return NS_OK;
}
NS_IMETHODIMP
EditorBase::ResetModificationCount() {
bool doNotify = (mModCount != 0);
mModCount = 0;
if (doNotify) {
NotifyDocumentListeners(eDocumentStateChanged);
}
return NS_OK;
}
// static
bool EditorBase::AreNodesSameType(nsIContent& aNode1,
nsIContent& aNode2) const {
if (aNode1.NodeInfo()->NameAtom() != aNode2.NodeInfo()->NameAtom()) {
return false;
}
if (!AsHTMLEditor() || !AsHTMLEditor()->IsCSSEnabled()) {
return true;
}
// If this is an HTMLEditor in CSS mode and they are <span> elements,
// let's check their styles.
if (!aNode1.IsHTMLElement(nsGkAtoms::span)) {
return true;
}
if (!aNode1.IsElement() || !aNode2.IsElement()) {
return false;
}
return CSSEditUtils::ElementsSameStyle(aNode1.AsElement(),
aNode2.AsElement());
}
// static
nsIContent* EditorBase::GetNodeAtRangeOffsetPoint(
const RawRangeBoundary& aPoint) {
if (NS_WARN_IF(!aPoint.IsSet())) {
return nullptr;
}
if (aPoint.Container()->GetAsText()) {
return aPoint.Container()->AsContent();
}
return aPoint.GetChildAtOffset();
}
// static
EditorRawDOMPoint EditorBase::GetStartPoint(const Selection& aSelection) {
if (NS_WARN_IF(!aSelection.RangeCount())) {
return EditorRawDOMPoint();
}
const nsRange* range = aSelection.GetRangeAt(0);
if (NS_WARN_IF(!range) || NS_WARN_IF(!range->IsPositioned())) {
return EditorRawDOMPoint();
}
return EditorRawDOMPoint(range->StartRef());
}
// static
EditorRawDOMPoint EditorBase::GetEndPoint(const Selection& aSelection) {
if (NS_WARN_IF(!aSelection.RangeCount())) {
return EditorRawDOMPoint();
}
const nsRange* range = aSelection.GetRangeAt(0);
if (NS_WARN_IF(!range) || NS_WARN_IF(!range->IsPositioned())) {
return EditorRawDOMPoint();
}
return EditorRawDOMPoint(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;
}
/**
* IsPreformatted() checks the style info for the node for the preformatted
* text style.
*/
// static
bool EditorBase::IsPreformatted(nsINode* aNode) {
if (NS_WARN_IF(!aNode)) {
return false;
}
// Look at the node (and its parent if it's not an element), and grab its
// ComputedStyle.
Element* element = Element::FromNode(aNode);
if (!element) {
element = aNode->GetParentElement();
if (!element) {
return false;
}
}
RefPtr<ComputedStyle> elementStyle =
nsComputedDOMStyle::GetComputedStyleNoFlush(element, nullptr);
if (!elementStyle) {
// Consider nodes without a ComputedStyle to be NOT preformatted:
// For instance, this is true of JS tags inside the body (which show
// up as #text nodes but have no ComputedStyle).
return false;
}
const nsStyleText* styleText = elementStyle->StyleText();
return styleText->WhiteSpaceIsSignificant();
}
SplitNodeResult EditorBase::SplitNodeDeepWithTransaction(
nsIContent& aMostAncestorToSplit,
const EditorDOMPoint& aStartOfDeepestRightNode,
SplitAtEdges aSplitAtEdges) {
MOZ_ASSERT(aStartOfDeepestRightNode.IsSetAndValid());
MOZ_ASSERT(
aStartOfDeepestRightNode.GetContainer() == &aMostAncestorToSplit ||
EditorUtils::IsDescendantOf(*aStartOfDeepestRightNode.GetContainer(),
aMostAncestorToSplit));
if (NS_WARN_IF(!aStartOfDeepestRightNode.IsSet())) {
return SplitNodeResult(NS_ERROR_INVALID_ARG);
}
nsCOMPtr<nsIContent> newLeftNodeOfMostAncestor;
EditorDOMPoint atStartOfRightNode(aStartOfDeepestRightNode);
while (true) {
// Need to insert rules code call here to do things like not split a list
// if you are after the last <li> or before the first, etc. For now we
// just have some smarts about unneccessarily splitting text nodes, which
// should be universal enough to put straight in this EditorBase routine.
if (NS_WARN_IF(!atStartOfRightNode.GetContainerAsContent())) {
return SplitNodeResult(NS_ERROR_FAILURE);
}
// If we meet an orphan node before meeting aMostAncestorToSplit, we need
// to stop splitting. This is a bug of the caller.
if (NS_WARN_IF(atStartOfRightNode.GetContainer() != &aMostAncestorToSplit &&
!atStartOfRightNode.GetContainer()->GetParent())) {
return SplitNodeResult(NS_ERROR_FAILURE);
}
nsIContent* currentRightNode = atStartOfRightNode.GetContainerAsContent();
// If the split point is middle of the node or the node is not a text node
// and we're allowed to create empty element node, split it.
if ((aSplitAtEdges == SplitAtEdges::eAllowToCreateEmptyContainer &&
!atStartOfRightNode.GetContainerAsText()) ||
(!atStartOfRightNode.IsStartOfContainer() &&
!atStartOfRightNode.IsEndOfContainer())) {
ErrorResult error;
nsCOMPtr<nsIContent> newLeftNode =
SplitNodeWithTransaction(atStartOfRightNode, error);
if (NS_WARN_IF(error.Failed())) {
return SplitNodeResult(error.StealNSResult());
}
if (currentRightNode == &aMostAncestorToSplit) {
// Actually, we split aMostAncestorToSplit.
return SplitNodeResult(newLeftNode, &aMostAncestorToSplit);
}
// Then, try to split its parent before current node.
atStartOfRightNode.Set(currentRightNode);
}
// If the split point is end of the node and it is a text node or we're not
// allowed to create empty container node, try to split its parent after it.
else if (!atStartOfRightNode.IsStartOfContainer()) {
if (currentRightNode == &aMostAncestorToSplit) {
return SplitNodeResult(&aMostAncestorToSplit, nullptr);
}
// Try to split its parent after current node.
atStartOfRightNode.Set(currentRightNode);
DebugOnly<bool> advanced = atStartOfRightNode.AdvanceOffset();
NS_WARNING_ASSERTION(advanced,
"Failed to advance offset after current node");
}
// If the split point is start of the node and it is a text node or we're
// not allowed to create empty container node, try to split its parent.
else {
if (currentRightNode == &aMostAncestorToSplit) {
return SplitNodeResult(nullptr, &aMostAncestorToSplit);
}
// Try to split its parent before current node.
atStartOfRightNode.Set(currentRightNode);
}
}
return SplitNodeResult(NS_ERROR_FAILURE);
}
EditorDOMPoint EditorBase::JoinNodesDeepWithTransaction(
nsIContent& aLeftNode, nsIContent& aRightNode) {
// While the rightmost children and their descendants of the left node match
// the leftmost children and their descendants of the right node, join them
// up.
nsCOMPtr<nsIContent> leftNodeToJoin = &aLeftNode;
nsCOMPtr<nsIContent> rightNodeToJoin = &aRightNode;
nsCOMPtr<nsINode> parentNode = aRightNode.GetParentNode();
EditorDOMPoint ret;
while (leftNodeToJoin && rightNodeToJoin && parentNode &&
AreNodesSameType(*leftNodeToJoin, *rightNodeToJoin)) {
uint32_t length = leftNodeToJoin->Length();
// Do the join
nsresult rv = JoinNodesWithTransaction(*leftNodeToJoin, *rightNodeToJoin);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorDOMPoint();
}
ret.Set(rightNodeToJoin, length);
if (parentNode->GetAsText()) {
// We've joined all the way down to text nodes, we're done!
return ret;
}
// Get new left and right nodes, and begin anew
parentNode = rightNodeToJoin;
rightNodeToJoin = parentNode->GetChildAt_Deprecated(length);
if (rightNodeToJoin) {
leftNodeToJoin = rightNodeToJoin->GetPreviousSibling();
} else {
leftNodeToJoin = nullptr;
}
// Skip over non-editable nodes
while (leftNodeToJoin && !IsEditable(leftNodeToJoin)) {
leftNodeToJoin = leftNodeToJoin->GetPreviousSibling();
}
if (!leftNodeToJoin) {
return ret;
}
while (rightNodeToJoin && !IsEditable(rightNodeToJoin)) {
rightNodeToJoin = rightNodeToJoin->GetNextSibling();
}
if (!rightNodeToJoin) {
return ret;
}
}
if (NS_WARN_IF(!ret.IsSet())) {
return EditorDOMPoint();
}
return ret;
}
void EditorBase::BeginUpdateViewBatch() {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(mUpdateCount >= 0, "bad state");
if (!mUpdateCount) {
// Turn off selection updates and notifications.
SelectionRefPtr()->StartBatchChanges();
}
mUpdateCount++;
}
void EditorBase::EndUpdateViewBatch() {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(mUpdateCount > 0, "bad state");
if (mUpdateCount <= 0) {
mUpdateCount = 0;
return;
}
if (--mUpdateCount) {
return;
}
// Turn selection updating and notifications back on.
SelectionRefPtr()->EndBatchChanges();
HTMLEditor* htmlEditor = AsHTMLEditor();
if (!htmlEditor) {
return;
}
// 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> rv = MOZ_KnownLive(htmlEditor)->RefreshEditingUI();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "RefreshEditingUI() failed");
}
TextComposition* EditorBase::GetComposition() const { return mComposition; }
EditorRawDOMPoint EditorBase::GetCompositionStartPoint() const {
return mComposition ? EditorRawDOMPoint(mComposition->GetStartRef())
: EditorRawDOMPoint();
}
EditorRawDOMPoint EditorBase::GetCompositionEndPoint() const {
return mComposition ? EditorRawDOMPoint(mComposition->GetEndRef())
: EditorRawDOMPoint();
}
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;
}
void EditorBase::DoAfterDoTransaction(nsITransaction* aTxn) {
bool isTransientTransaction;
MOZ_ALWAYS_SUCCEEDS(aTxn->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;
GetModificationCount(&modCount);
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<EditAggregateTransaction>
EditorBase::CreateTxnForDeleteSelection(EDirection aAction,
nsINode** aRemovingNode,
int32_t* aOffset, int32_t* aLength) {
MOZ_ASSERT(IsEditActionDataAvailable());
// Check whether the selection is collapsed and we should do nothing:
if (NS_WARN_IF(SelectionRefPtr()->IsCollapsed() && aAction == eNone)) {
return nullptr;
}
// allocate the out-param transaction
RefPtr<EditAggregateTransaction> aggregateTransaction =
EditAggregateTransaction::Create();
for (uint32_t rangeIdx = 0; rangeIdx < SelectionRefPtr()->RangeCount();
++rangeIdx) {
RefPtr<nsRange> range = SelectionRefPtr()->GetRangeAt(rangeIdx);
if (NS_WARN_IF(!range)) {
return nullptr;
}
// 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...
aggregateTransaction->AppendChild(deleteRangeTransaction);
} else if (aAction != eNone) {
// we have an insertion point. delete the thing in front of it or
// behind it, depending on aAction
// XXX Odd, when there are two or more ranges, this returns the last
// range information with aRemovingNode, aOffset and aLength.
RefPtr<EditTransactionBase> deleteRangeTransaction =
CreateTxnForDeleteRange(range, aAction, aRemovingNode, aOffset,
aLength);
// XXX When there are two or more ranges and at least one of them is
// not editable, deleteRangeTransaction may be nullptr.
// In such case, should we stop removing other ranges too?
if (NS_WARN_IF(!deleteRangeTransaction)) {
return nullptr;
}
aggregateTransaction->AppendChild(deleteRangeTransaction);
}
}
return aggregateTransaction.forget();
}
// XXX: currently, this doesn't handle edge conditions because GetNext/GetPrior
// are not implemented
already_AddRefed<EditTransactionBase> EditorBase::CreateTxnForDeleteRange(
nsRange* aRangeToDelete, EDirection aAction, nsINode** aRemovingNode,
int32_t* aOffset, int32_t* aLength) {
MOZ_ASSERT(aAction != eNone);
// get the node and offset of the insertion point
nsCOMPtr<nsINode> node = aRangeToDelete->GetStartContainer();
if (NS_WARN_IF(!node)) {
return nullptr;
}
nsIContent* child = aRangeToDelete->GetChildAtStartOffset();
int32_t offset = aRangeToDelete->StartOffset();
// determine if the insertion point is at the beginning, middle, or end of
// the node
uint32_t count = node->Length();
bool isFirst = !offset;
bool isLast = (count == (uint32_t)offset);
// XXX: if isFirst && isLast, 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
if (aAction == ePrevious && isFirst) {
// we're backspacing from the beginning of the node. Delete the first
// thing to our left
nsCOMPtr<nsIContent> priorNode = GetPreviousEditableNode(*node);
if (NS_WARN_IF(!priorNode)) {
return nullptr;
}
// there is a priorNode, so delete its last child (if chardata, delete the
// last char). if it has no children, delete it
if (RefPtr<Text> priorNodeAsText = Text::FromNode(priorNode)) {
uint32_t length = priorNode->Length();
// Bail out for empty chardata XXX: Do we want to do something else?
if (NS_WARN_IF(!length)) {
return nullptr;
}
RefPtr<DeleteTextTransaction> deleteTextTransaction =
DeleteTextTransaction::MaybeCreateForPreviousCharacter(
*this, *priorNodeAsText, length);
if (NS_WARN_IF(!deleteTextTransaction)) {
return nullptr;
}
*aOffset = deleteTextTransaction->Offset();
*aLength = deleteTextTransaction->LengthToDelete();
priorNode.forget(aRemovingNode);
return deleteTextTransaction.forget();
}
// priorNode is not chardata, so tell its parent to delete it
RefPtr<DeleteNodeTransaction> deleteNodeTransaction =
DeleteNodeTransaction::MaybeCreate(*this, *priorNode);
if (NS_WARN_IF(!deleteNodeTransaction)) {
return nullptr;
}
priorNode.forget(aRemovingNode);
return deleteNodeTransaction.forget();
}
if (aAction == eNext && isLast) {
// we're deleting from the end of the node. Delete the first thing to our
// right
nsCOMPtr<nsIContent> nextNode = GetNextEditableNode(*node);
if (NS_WARN_IF(!nextNode)) {
return nullptr;
}
// there is a nextNode, so delete its first child (if chardata, delete the
// first char). if it has no children, delete it
if (RefPtr<Text> nextNodeAsText = Text::FromNode(nextNode)) {
uint32_t length = nextNode->Length();
// Bail out for empty chardata XXX: Do we want to do something else?
if (NS_WARN_IF(!length)) {
return nullptr;
}
RefPtr<DeleteTextTransaction> deleteTextTransaction =
DeleteTextTransaction::MaybeCreateForNextCharacter(
*this, *nextNodeAsText, 0);
if (NS_WARN_IF(!deleteTextTransaction)) {
return nullptr;
}
*aOffset = deleteTextTransaction->Offset();
*aLength = deleteTextTransaction->LengthToDelete();
nextNode.forget(aRemovingNode);
return deleteTextTransaction.forget();
}
// nextNode is not chardata, so tell its parent to delete it
RefPtr<DeleteNodeTransaction> deleteNodeTransaction =
DeleteNodeTransaction::MaybeCreate(*this, *nextNode);
if (NS_WARN_IF(!deleteNodeTransaction)) {
return nullptr;
}
nextNode.forget(aRemovingNode);
return deleteNodeTransaction.forget();
}
if (RefPtr<Text> nodeAsText = Text::FromNode(node)) {
if (NS_WARN_IF(aAction != ePrevious && aAction != eNext)) {
return nullptr;
}
// We have chardata, so delete a char at the proper offset
RefPtr<DeleteTextTransaction> deleteTextTransaction =
aAction == ePrevious
? DeleteTextTransaction::MaybeCreateForPreviousCharacter(
*this, *nodeAsText, offset)
: DeleteTextTransaction::MaybeCreateForNextCharacter(
*this, *nodeAsText, offset);
if (NS_WARN_IF(!deleteTextTransaction)) {
return nullptr;
}
*aOffset = deleteTextTransaction->Offset();
*aLength = deleteTextTransaction->LengthToDelete();
node.forget(aRemovingNode);
return deleteTextTransaction.forget();
}
// we're either deleting a node or chardata, need to dig into the next/prev
// node to find out
nsCOMPtr<nsINode> selectedNode;
if (aAction == ePrevious) {
selectedNode =
GetPreviousEditableNode(EditorRawDOMPoint(node, child, offset));
} else if (aAction == eNext) {
selectedNode = GetNextEditableNode(EditorRawDOMPoint(node, child, offset));
}
while (selectedNode && selectedNode->IsCharacterData() &&
!selectedNode->Length()) {
// Can't delete an empty chardata node (bug 762183)
if (aAction == ePrevious) {
selectedNode = GetPreviousEditableNode(*selectedNode);
} else if (aAction == eNext) {
selectedNode = GetNextEditableNode(*selectedNode);
}
}
if (NS_WARN_IF(!selectedNode)) {
return nullptr;
}
if (RefPtr<Text> selectedNodeAsText = Text::FromNode(selectedNode)) {
if (NS_WARN_IF(aAction != ePrevious && aAction != eNext)) {
return nullptr;
}
// we are deleting from a chardata node, so do a character deletion
uint32_t position = 0;
if (aAction == ePrevious) {
position = selectedNode->Length();
}
RefPtr<DeleteTextTransaction> deleteTextTransaction =
aAction == ePrevious
? DeleteTextTransaction::MaybeCreateForPreviousCharacter(
*this, *selectedNodeAsText, position)
: DeleteTextTransaction::MaybeCreateForNextCharacter(
*this, *selectedNodeAsText, position);
if (NS_WARN_IF(!deleteTextTransaction)) {
return nullptr;
}
*aOffset = deleteTextTransaction->Offset();
*aLength = deleteTextTransaction->LengthToDelete();
selectedNode.forget(aRemovingNode);
return deleteTextTransaction.forget();
}
RefPtr<DeleteNodeTransaction> deleteNodeTransaction =
DeleteNodeTransaction::MaybeCreate(*this, *selectedNode);
if (NS_WARN_IF(!deleteNodeTransaction)) {
return nullptr;
}
selectedNode.forget(aRemovingNode);
return deleteNodeTransaction.forget();
}
nsresult EditorBase::CreateRange(nsINode* aStartContainer, int32_t aStartOffset,
nsINode* aEndContainer, int32_t aEndOffset,
nsRange** aRange) {
RefPtr<nsRange> range = nsRange::Create(
aStartContainer, aStartOffset, aEndContainer, aEndOffset, IgnoreErrors());
if (NS_WARN_IF(!range)) {
return NS_ERROR_FAILURE;
}
range.forget(aRange);
return NS_OK;
}
nsresult EditorBase::AppendNodeToSelectionAsRange(nsINode* aNode) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (NS_WARN_IF(!aNode)) {
return NS_ERROR_INVALID_ARG;
}
nsCOMPtr<nsINode> parentNode = aNode->GetParentNode();
if (NS_WARN_IF(!parentNode)) {
return NS_ERROR_FAILURE;
}
int32_t offset = GetChildOffset(aNode, parentNode);
RefPtr<nsRange> range;
nsresult rv = CreateRange(parentNode, offset, parentNode, offset + 1,
getter_AddRefs(range));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!range)) {
return NS_ERROR_FAILURE;
}
ErrorResult err;
SelectionRefPtr()->AddRangeAndSelectFramesAndNotifyListeners(*range, err);
NS_WARNING_ASSERTION(!err.Failed(), "Failed to add range to Selection");
return err.StealNSResult();
}
nsresult EditorBase::ClearSelection() {
MOZ_ASSERT(IsEditActionDataAvailable());
ErrorResult rv;
SelectionRefPtr()->RemoveAllRanges(rv);
NS_WARNING_ASSERTION(!rv.Failed(),
"Failed to remove all ranges from Selection");
return rv.StealNSResult();
}
already_AddRefed<Element> EditorBase::CreateHTMLContent(const nsAtom* aTag) {
MOZ_ASSERT(aTag);
RefPtr<Document> doc = GetDocument();
if (!doc) {
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 doc->CreateElem(nsDependentAtomString(aTag), nullptr,
kNameSpaceID_XHTML);
}
already_AddRefed<nsTextNode> EditorBase::CreateTextNode(
const nsAString& aData) {
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.
text->SetText(aData, false);
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);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<nsAtom> attribute = NS_Atomize(aAttribute);
nsresult rv = SetAttributeOrEquivalent(aElement, attribute, aValue,
aSuppressTransaction);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
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);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<nsAtom> attribute = NS_Atomize(aAttribute);
nsresult rv =
RemoveAttributeOrEquivalent(aElement, attribute, aSuppressTransaction);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult EditorBase::HandleKeyPressEvent(WidgetKeyboardEvent* aKeyboardEvent) {
// 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.
if (NS_WARN_IF(!aKeyboardEvent)) {
return NS_ERROR_UNEXPECTED;
}
MOZ_ASSERT(aKeyboardEvent->mMessage == eKeyPress,
"HandleKeyPressEvent gets non-keypress event");
// if we are readonly or disabled, then do nothing.
if (IsReadonly() || IsDisabled()) {
// consume backspace for disabled and readonly textfields, to prevent
// back in history, which could be confusing to users
if (aKeyboardEvent->mKeyCode == NS_VK_BACK) {
aKeyboardEvent->PreventDefault();
}
return NS_OK;
}
switch (aKeyboardEvent->mKeyCode) {
case NS_VK_META:
case NS_VK_WIN:
case NS_VK_SHIFT:
case NS_VK_CONTROL:
case NS_VK_ALT:
aKeyboardEvent->PreventDefault(); // consumed
return NS_OK;
}
return NS_OK;
}
nsresult EditorBase::HandleInlineSpellCheck(
EditSubAction aEditSubAction, nsINode* previousSelectedNode,
uint32_t previousSelectedOffset, nsINode* aStartContainer,
uint32_t aStartOffset, nsINode* aEndContainer, uint32_t aEndOffset) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (!mInlineSpellChecker) {
return NS_OK;
}
return mInlineSpellChecker->SpellCheckAfterEditorChange(
aEditSubAction, *SelectionRefPtr(), previousSelectedNode,
previousSelectedOffset, aStartContainer, aStartOffset, aEndContainer,
aEndOffset);
}
Element* EditorBase::FindSelectionRoot(nsINode* aNode) const {
return GetRoot();
}
void EditorBase::InitializeSelectionAncestorLimit(nsIContent& aAncestorLimit) {
MOZ_ASSERT(IsEditActionDataAvailable());
SelectionRefPtr()->SetAncestorLimiter(&aAncestorLimit);
}
nsresult EditorBase::InitializeSelection(EventTarget* aFocusEventTarget) {
MOZ_ASSERT(IsEditActionDataAvailable());
nsCOMPtr<nsINode> targetNode = do_QueryInterface(aFocusEventTarget);
if (NS_WARN_IF(!targetNode)) {
return NS_ERROR_INVALID_ARG;
}
nsCOMPtr<nsIContent> selectionRootContent = FindSelectionRoot(targetNode);
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(SelectionRefPtr());
selectionController->SetCaretReadOnly(IsReadonly());
selectionController->SetCaretEnabled(true);
// 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(targetNode->OwnerDoc()->HasFlag(NODE_IS_EDITABLE));
// Init selection
selectionController->SetDisplaySelection(
nsISelectionController::SELECTION_ON);
selectionController->SetSelectionFlags(nsISelectionDisplay::DISPLAY_ALL);
selectionController->RepaintSelection(
nsISelectionController::SELECTION_NORMAL);
// 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 {
SelectionRefPtr()->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!
nsRange* firstRange = SelectionRefPtr()->GetRangeAt(0);
if (NS_WARN_IF(!firstRange)) {
return NS_ERROR_FAILURE;
}
EditorRawDOMPoint atStartOfFirstRange(firstRange->StartRef());
EditorRawDOMPoint betterInsertionPoint =
FindBetterInsertionPoint(atStartOfFirstRange);
Text* textNode = betterInsertionPoint.GetContainerAsText();
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");
CompositionTransaction::SetIMESelection(
*this, textNode, mComposition->XPOffsetInTextNode(),
mComposition->XPLengthInTextNode(), mComposition->GetRanges());
}
}
return NS_OK;
}
class RepaintSelectionRunner final : public Runnable {
public:
explicit RepaintSelectionRunner(nsISelectionController* aSelectionController)
: Runnable("RepaintSelectionRunner"),
mSelectionController(aSelectionController) {}
NS_IMETHOD Run() override {
mSelectionController->RepaintSelection(
nsISelectionController::SELECTION_NORMAL);
return NS_OK;
}
private:
nsCOMPtr<nsISelectionController> mSelectionController;
};
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;
}
SelectionRefPtr()->SetAncestorLimiter(nullptr);
if (NS_WARN_IF(!GetPresShell())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (RefPtr<nsCaret> caret = GetCaret()) {
caret->SetIgnoreUserModify(true);
}
selectionController->SetCaretEnabled(false);
nsFocusManager* fm = nsFocusManager::GetFocusManager();
if (NS_WARN_IF(!fm)) {
return NS_ERROR_NOT_INITIALIZED;
}
fm->UpdateCaretForCaretBrowsingMode();
if (!HasIndependentSelection()) {
// If this editor doesn't have an independent selection, i.e., it must
// mean that it is an HTML editor, the selection controller is shared with
// presShell. So, even this editor loses focus, other part of the document
// may still have focus.
RefPtr<Document> doc = GetDocument();
ErrorResult ret;
if (!doc || !doc->HasFocus(ret)) {
// If the document already lost focus, mark the selection as disabled.
selectionController->SetDisplaySelection(
nsISelectionController::SELECTION_DISABLED);
} else {
// Otherwise, mark selection as normal because outside of a
// contenteditable element should be selected with normal selection
// color after here.
selectionController->SetDisplaySelection(
nsISelectionController::SELECTION_ON);
}
} else if (IsFormWidget() || IsPasswordEditor() || IsReadonly() ||
IsDisabled() || IsInputFiltered()) {
// In <input> or <textarea>, the independent selection should be hidden
// while this editor doesn't have focus.
selectionController->SetDisplaySelection(
nsISelectionController::SELECTION_HIDDEN);
} else {
// Otherwise, although we're not sure how this case happens, the
// independent selection should be marked as disabled.
selectionController->SetDisplaySelection(
nsISelectionController::SELECTION_DISABLED);
}
// FinalizeSelection might be called from ContentRemoved even if selection
// isn't updated. So we need to call RepaintSelection after updated it.
nsContentUtils::AddScriptRunner(
new RepaintSelectionRunner(selectionController));
return NS_OK;
}
void EditorBase::ReinitializeSelection(Element& aElement) {
if (NS_WARN_IF(Destroyed())) {
return;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return;
}
OnFocus(&aElement);
// If previous focused editor turn on spellcheck and this editor doesn't
// turn on it, spellcheck state is mismatched. So we need to re-sync it.
SyncRealTimeSpell();
nsPresContext* context = GetPresContext();
if (NS_WARN_IF(!context)) {
return;
}
nsCOMPtr<nsIContent> focusedContent = GetFocusedContentForIME();
IMEStateManager::OnFocusInEditor(context, focusedContent, *this);
}
Element* EditorBase::GetEditorRoot() const { return GetRoot(); }
Element* EditorBase::GetExposedRoot() const {
Element* rootElement = GetRoot();
// For plaintext editors, we need to ask the input/textarea element directly.
if (rootElement && rootElement->IsRootOfNativeAnonymousSubtree()) {
rootElement = rootElement->GetParent()->AsElement();
}
return rootElement;
}
nsresult EditorBase::DetermineCurrentDirection() {
// Get the current root direction from its frame
nsIContent* rootElement = GetExposedRoot();
NS_ENSURE_TRUE(rootElement, NS_ERROR_FAILURE);
// If we don't have an explicit direction, determine our direction
// from the content's direction
if (!IsRightToLeft() && !IsLeftToRight()) {
nsIFrame* frame = rootElement->GetPrimaryFrame();
NS_ENSURE_TRUE(frame, 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 (frame->StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
mFlags |= nsIPlaintextEditor::eEditorRightToLeft;
} else {
mFlags |= nsIPlaintextEditor::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;
}
// XXX Oddly, Chrome does not dispatch beforeinput event in this case but
// dispatches input event.
nsresult rv = DetermineCurrentDirection();
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
if (IsRightToLeft()) {
editActionData.SetData(NS_LITERAL_STRING("ltr"));
nsresult rv = SetTextDirectionTo(TextDirection::eLTR);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
} else if (IsLeftToRight()) {
editActionData.SetData(NS_LITERAL_STRING("rtl"));
nsresult rv = SetTextDirectionTo(TextDirection::eRTL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
} else {
MOZ_ASSERT_UNREACHABLE(
"Why did DetermineCurrentDirection() not determine current direction?");
}
// XXX When we don't change the text direction, do we really need to
// dispatch input event?
FireInputEvent();
return NS_OK;
}
void EditorBase::SwitchTextDirectionTo(TextDirection aTextDirection) {
AutoEditActionDataSetter editActionData(*this, EditAction::eSetTextDirection);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return;
}
// XXX Oddly, Chrome does not dispatch beforeinput event in this case but
// dispatches input event.
nsresult rv = DetermineCurrentDirection();
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
switch (aTextDirection) {
case TextDirection::eLTR:
editActionData.SetData(NS_LITERAL_STRING("ltr"));
if (IsRightToLeft() &&
NS_WARN_IF(NS_FAILED(SetTextDirectionTo(aTextDirection)))) {
return;
}
break;
case TextDirection::eRTL:
editActionData.SetData(NS_LITERAL_STRING("rtl"));
if (IsLeftToRight() &&
NS_WARN_IF(NS_FAILED(SetTextDirectionTo(aTextDirection)))) {
return;
}
break;
default:
MOZ_ASSERT_UNREACHABLE("Invalid aTextDirection value");
break;
}
// XXX When we don't change the text direction, do we really need to
// dispatch input event?
FireInputEvent();
}
nsresult EditorBase::SetTextDirectionTo(TextDirection aTextDirection) {
Element* rootElement = GetExposedRoot();
if (aTextDirection == TextDirection::eLTR) {
NS_ASSERTION(!IsLeftToRight(), "Unexpected mutually exclusive flag");
mFlags &= ~nsIPlaintextEditor::eEditorRightToLeft;
mFlags |= nsIPlaintextEditor::eEditorLeftToRight;
nsresult rv = rootElement->SetAttr(kNameSpaceID_None, nsGkAtoms::dir,
NS_LITERAL_STRING("ltr"), true);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
if (aTextDirection == TextDirection::eRTL) {
NS_ASSERTION(!IsRightToLeft(), "Unexpected mutually exclusive flag");
mFlags |= nsIPlaintextEditor::eEditorRightToLeft;
mFlags &= ~nsIPlaintextEditor::eEditorLeftToRight;
nsresult rv = rootElement->SetAttr(kNameSpaceID_None, nsGkAtoms::dir,
NS_LITERAL_STRING("rtl"), true);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
return NS_OK;
}
bool EditorBase::IsModifiableNode(const nsINode& aNode) const {
return !AsHTMLEditor() || aNode.IsEditable();
}
nsIContent* EditorBase::GetFocusedContent() {
EventTarget* piTarget = GetDOMEventTarget();
if (!piTarget) {
return nullptr;
}
nsFocusManager* fm = nsFocusManager::GetFocusManager();
NS_ENSURE_TRUE(fm, nullptr);
nsIContent* content = fm->GetFocusedElement();
MOZ_ASSERT((content == piTarget) == SameCOMIdentity(content, piTarget));
return (content == piTarget) ? content : nullptr;
}
already_AddRefed<nsIContent> EditorBase::GetFocusedContentForIME() {
nsCOMPtr<nsIContent> content = GetFocusedContent();
return content.forget();
}
bool EditorBase::IsActiveInDOMWindow() {
EventTarget* piTarget = GetDOMEventTarget();
if (!piTarget) {
return false;
}
nsFocusManager* fm = nsFocusManager::GetFocusManager();
NS_ENSURE_TRUE(fm, false);
RefPtr<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) {
// 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()) {
nsIContent* focusedContent = GetFocusedContent();
if (!focusedContent) {
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();
}
void EditorBase::OnFocus(EventTarget* aFocusEventTarget) {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return;
}
InitializeSelection(aFocusEventTarget);
mSpellCheckerDictionaryUpdated = false;
if (mInlineSpellChecker && CanEnableSpellCheck()) {
mInlineSpellChecker->UpdateCurrentDictionary();
mSpellCheckerDictionaryUpdated = true;
}
}
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_WARN_IF(NS_FAILED(rv))) {
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_WARN_IF(NS_FAILED(rv))) {
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;
}
/******************************************************************************
* EditorBase::AutoSelectionRestorer
*****************************************************************************/
EditorBase::AutoSelectionRestorer::AutoSelectionRestorer(
EditorBase& aEditorBase MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
: mEditorBase(nullptr) {
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
if (aEditorBase.ArePreservingSelection()) {
// We already have initialized mParentData::mSavedSelection, so this must
// be nested call.
return;
}
MOZ_ASSERT(aEditorBase.IsEditActionDataAvailable());
mEditorBase = &aEditorBase;
mEditorBase->PreserveSelectionAcrossActions();
}
EditorBase::AutoSelectionRestorer::~AutoSelectionRestorer() {
if (mEditorBase && mEditorBase->ArePreservingSelection()) {
mEditorBase->RestorePreservedSelection();
}
}
void EditorBase::AutoSelectionRestorer::Abort() {
if (mEditorBase) {
mEditorBase->StopPreservingSelection();
}
}
/*****************************************************************************
* mozilla::EditorBase::AutoEditActionDataSetter
*****************************************************************************/
EditorBase::AutoEditActionDataSetter::AutoEditActionDataSetter(
const EditorBase& aEditorBase, EditAction aEditAction,
nsIPrincipal* aPrincipal /* = nullptr */)
: mEditorBase(const_cast<EditorBase&>(aEditorBase)),
mParentData(aEditorBase.mEditActionData),
mData(VoidString()),
mTopLevelEditSubAction(EditSubAction::eNone) {
// If we're nested edit action, copies necessary data from the parent.
if (mParentData) {
mSelection = mParentData->mSelection;
// If we're eNotEditing, we should inherit the parent's edit action.
// This may occur if creator or its callee use public methods which
// just returns something.
if (aEditAction != EditAction::eNotEditing) {
mEditAction = aEditAction;
}
mTopLevelEditSubAction = mParentData->mTopLevelEditSubAction;
mDirectionOfTopLevelEditSubAction =
mParentData->mDirectionOfTopLevelEditSubAction;
} else {
mSelection = mEditorBase.GetSelection();
if (NS_WARN_IF(!mSelection)) {
return;
}
mEditAction = aEditAction;
mDirectionOfTopLevelEditSubAction = eNone;
}
mEditorBase.mEditActionData = this;
}
EditorBase::AutoEditActionDataSetter::~AutoEditActionDataSetter() {
if (!mSelection || NS_WARN_IF(mEditorBase.mEditActionData != this)) {
return;
}
mEditorBase.mEditActionData = mParentData;
}
void EditorBase::AutoEditActionDataSetter::SetColorData(
const nsAString& aData) {
if (aData.IsEmpty()) {
// When removing color/background-color, let's use empty string.
MOZ_ASSERT(!EmptyString().IsVoid());
mData = EmptyString();
return;
}
bool wasCurrentColor = false;
nscolor color = NS_RGB(0, 0, 0);
if (!ServoCSSParser::ComputeColor(nullptr, NS_RGB(0, 0, 0), aData, &color,
&wasCurrentColor)) {
// If we cannot parse aData, let's set original value as-is. It could be
// new format defined by newer spec.
MOZ_ASSERT(!aData.IsVoid());
mData = aData;
return;
}
// If it's current color, we cannot resolve actual current color here.
// So, let's return "currentcolor" keyword, but let's use it as-is because
// there is no agreement between browser vendors.
if (wasCurrentColor) {
MOZ_ASSERT(!aData.IsVoid());
mData = aData;
return;
}
// Get serialized color value (i.e., "rgb()" or "rgba()").
nsStyleUtil::GetSerializedColorValue(color, mData);
MOZ_ASSERT(!mData.IsVoid());
}
void EditorBase::AutoEditActionDataSetter::InitializeDataTransfer(
DataTransfer* aDataTransfer) {
MOZ_ASSERT(aDataTransfer);
MOZ_ASSERT(aDataTransfer->IsReadOnly());
mDataTransfer = aDataTransfer;
}
void EditorBase::AutoEditActionDataSetter::InitializeDataTransfer(
nsITransferable* aTransferable) {
MOZ_ASSERT(aTransferable);
Document* document = mEditorBase.GetDocument();
nsIGlobalObject* scopeObject =
document ? document->GetScopeObject() : nullptr;
mDataTransfer = new DataTransfer(scopeObject, eEditorInput, aTransferable);
}
void EditorBase::AutoEditActionDataSetter::InitializeDataTransfer(
const nsAString& aString) {
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) {
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);
}
} // namespace mozilla
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