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Editor.cpp
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/*
* Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "Editor.h"
#include "AXObjectCache.h"
#include "AlternativeTextController.h"
#include "ApplyStyleCommand.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSProperty.h"
#include "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "CachedResourceLoader.h"
#include "ClipboardEvent.h"
#include "CompositionEvent.h"
#include "CreateLinkCommand.h"
#include "DeleteButtonController.h"
#include "DeleteSelectionCommand.h"
#include "DictationAlternative.h"
#include "DictationCommand.h"
#include "DocumentFragment.h"
#include "DocumentMarkerController.h"
#include "EditingText.h"
#include "EditorClient.h"
#include "EventHandler.h"
#include "EventNames.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameTree.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "HTMLFormControlElement.h"
#include "HTMLFrameOwnerElement.h"
#include "HTMLNames.h"
#include "HTMLTextAreaElement.h"
#include "HitTestResult.h"
#include "IndentOutdentCommand.h"
#include "InsertListCommand.h"
#include "KeyboardEvent.h"
#include "KillRing.h"
#include "ModifySelectionListLevel.h"
#include "NodeList.h"
#include "Page.h"
#include "Pasteboard.h"
#include "RemoveFormatCommand.h"
#include "RenderBlock.h"
#include "RenderPart.h"
#include "RenderTextControl.h"
#include "RenderedPosition.h"
#include "ReplaceSelectionCommand.h"
#include "Settings.h"
#include "ShadowRoot.h"
#include "SimplifyMarkupCommand.h"
#include "Sound.h"
#include "SpellChecker.h"
#include "SpellingCorrectionCommand.h"
#include "StylePropertySet.h"
#include "StyleResolver.h"
#include "Text.h"
#include "TextCheckerClient.h"
#include "TextCheckingHelper.h"
#include "TextEvent.h"
#include "TextIterator.h"
#include "TypingCommand.h"
#include "UndoManager.h"
#include "UserTypingGestureIndicator.h"
#include "htmlediting.h"
#include "markup.h"
#include "visible_units.h"
#include <wtf/UnusedParam.h>
#include <wtf/unicode/CharacterNames.h>
#include <wtf/unicode/Unicode.h>
namespace WebCore {
using namespace std;
using namespace HTMLNames;
using namespace WTF;
using namespace Unicode;
// When an event handler has moved the selection outside of a text control
// we should use the target control's selection for this editing operation.
VisibleSelection Editor::selectionForCommand(Event* event)
{
VisibleSelection selection = m_frame->selection()->selection();
if (!event)
return selection;
// If the target is a text control, and the current selection is outside of its shadow tree,
// then use the saved selection for that text control.
HTMLTextFormControlElement* textFormControlOfSelectionStart = enclosingTextFormControl(selection.start());
HTMLTextFormControlElement* textFromControlOfTarget = toTextFormControl(event->target()->toNode());
if (textFromControlOfTarget && (selection.start().isNull() || textFromControlOfTarget != textFormControlOfSelectionStart)) {
if (RefPtr<Range> range = textFromControlOfTarget->selection())
return VisibleSelection(range.get(), DOWNSTREAM, selection.isDirectional());
}
return selection;
}
// Function considers Mac editing behavior a fallback when Page or Settings is not available.
EditingBehavior Editor::behavior() const
{
if (!m_frame || !m_frame->settings())
return EditingBehavior(EditingMacBehavior);
return EditingBehavior(m_frame->settings()->editingBehaviorType());
}
EditorClient* Editor::client() const
{
if (Page* page = m_frame->page())
return page->editorClient();
return 0;
}
TextCheckerClient* Editor::textChecker() const
{
if (EditorClient* owner = client())
return owner->textChecker();
return 0;
}
void Editor::handleKeyboardEvent(KeyboardEvent* event)
{
if (EditorClient* c = client())
c->handleKeyboardEvent(event);
}
void Editor::handleInputMethodKeydown(KeyboardEvent* event)
{
if (EditorClient* c = client())
c->handleInputMethodKeydown(event);
}
bool Editor::handleTextEvent(TextEvent* event)
{
// Default event handling for Drag and Drop will be handled by DragController
// so we leave the event for it.
if (event->isDrop())
return false;
if (event->isPaste()) {
if (event->pastingFragment())
replaceSelectionWithFragment(event->pastingFragment(), false, event->shouldSmartReplace(), event->shouldMatchStyle());
else
replaceSelectionWithText(event->data(), false, event->shouldSmartReplace());
return true;
}
String data = event->data();
if (data == "\n") {
if (event->isLineBreak())
return insertLineBreak();
return insertParagraphSeparator();
}
return insertTextWithoutSendingTextEvent(data, false, event);
}
bool Editor::canEdit() const
{
return m_frame->selection()->rootEditableElement();
}
bool Editor::canEditRichly() const
{
return m_frame->selection()->isContentRichlyEditable();
}
// WinIE uses onbeforecut and onbeforepaste to enables the cut and paste menu items. They
// also send onbeforecopy, apparently for symmetry, but it doesn't affect the menu items.
// We need to use onbeforecopy as a real menu enabler because we allow elements that are not
// normally selectable to implement copy/paste (like divs, or a document body).
bool Editor::canDHTMLCut()
{
return !m_frame->selection()->isInPasswordField() && !dispatchCPPEvent(eventNames().beforecutEvent, ClipboardNumb);
}
bool Editor::canDHTMLCopy()
{
return !m_frame->selection()->isInPasswordField() && !dispatchCPPEvent(eventNames().beforecopyEvent, ClipboardNumb);
}
bool Editor::canDHTMLPaste()
{
return !dispatchCPPEvent(eventNames().beforepasteEvent, ClipboardNumb);
}
bool Editor::canCut() const
{
return canCopy() && canDelete();
}
static HTMLImageElement* imageElementFromImageDocument(Document* document)
{
if (!document)
return 0;
if (!document->isImageDocument())
return 0;
HTMLElement* body = document->body();
if (!body)
return 0;
Node* node = body->firstChild();
if (!node)
return 0;
if (!node->hasTagName(imgTag))
return 0;
return static_cast<HTMLImageElement*>(node);
}
bool Editor::canCopy() const
{
if (imageElementFromImageDocument(m_frame->document()))
return true;
FrameSelection* selection = m_frame->selection();
return selection->isRange() && !selection->isInPasswordField();
}
bool Editor::canPaste() const
{
return canEdit();
}
bool Editor::canDelete() const
{
FrameSelection* selection = m_frame->selection();
return selection->isRange() && selection->rootEditableElement();
}
bool Editor::canDeleteRange(Range* range) const
{
ExceptionCode ec = 0;
Node* startContainer = range->startContainer(ec);
Node* endContainer = range->endContainer(ec);
if (!startContainer || !endContainer)
return false;
if (!startContainer->rendererIsEditable() || !endContainer->rendererIsEditable())
return false;
if (range->collapsed(ec)) {
VisiblePosition start(range->startPosition(), DOWNSTREAM);
VisiblePosition previous = start.previous();
// FIXME: We sometimes allow deletions at the start of editable roots, like when the caret is in an empty list item.
if (previous.isNull() || previous.deepEquivalent().deprecatedNode()->rootEditableElement() != startContainer->rootEditableElement())
return false;
}
return true;
}
bool Editor::smartInsertDeleteEnabled()
{
return client() && client()->smartInsertDeleteEnabled();
}
bool Editor::canSmartCopyOrDelete()
{
return client() && client()->smartInsertDeleteEnabled() && m_frame->selection()->granularity() == WordGranularity;
}
bool Editor::isSelectTrailingWhitespaceEnabled()
{
return client() && client()->isSelectTrailingWhitespaceEnabled();
}
bool Editor::deleteWithDirection(SelectionDirection direction, TextGranularity granularity, bool killRing, bool isTypingAction)
{
if (!canEdit())
return false;
if (m_frame->selection()->isRange()) {
if (isTypingAction) {
TypingCommand::deleteKeyPressed(m_frame->document(), canSmartCopyOrDelete() ? TypingCommand::SmartDelete : 0, granularity);
revealSelectionAfterEditingOperation();
} else {
if (killRing)
addToKillRing(selectedRange().get(), false);
deleteSelectionWithSmartDelete(canSmartCopyOrDelete());
// Implicitly calls revealSelectionAfterEditingOperation().
}
} else {
TypingCommand::Options options = 0;
if (canSmartCopyOrDelete())
options |= TypingCommand::SmartDelete;
if (killRing)
options |= TypingCommand::KillRing;
switch (direction) {
case DirectionForward:
case DirectionRight:
TypingCommand::forwardDeleteKeyPressed(m_frame->document(), options, granularity);
break;
case DirectionBackward:
case DirectionLeft:
TypingCommand::deleteKeyPressed(m_frame->document(), options, granularity);
break;
}
revealSelectionAfterEditingOperation();
}
// FIXME: We should to move this down into deleteKeyPressed.
// clear the "start new kill ring sequence" setting, because it was set to true
// when the selection was updated by deleting the range
if (killRing)
setStartNewKillRingSequence(false);
return true;
}
void Editor::deleteSelectionWithSmartDelete(bool smartDelete)
{
if (m_frame->selection()->isNone())
return;
applyCommand(DeleteSelectionCommand::create(m_frame->document(), smartDelete));
}
void Editor::pasteAsPlainText(const String& pastingText, bool smartReplace)
{
Node* target = findEventTargetFromSelection();
if (!target)
return;
ExceptionCode ec = 0;
target->dispatchEvent(TextEvent::createForPlainTextPaste(m_frame->document()->domWindow(), pastingText, smartReplace), ec);
}
void Editor::pasteAsFragment(PassRefPtr<DocumentFragment> pastingFragment, bool smartReplace, bool matchStyle)
{
Node* target = findEventTargetFromSelection();
if (!target)
return;
ExceptionCode ec = 0;
target->dispatchEvent(TextEvent::createForFragmentPaste(m_frame->document()->domWindow(), pastingFragment, smartReplace, matchStyle), ec);
}
void Editor::pasteAsPlainTextBypassingDHTML()
{
pasteAsPlainTextWithPasteboard(Pasteboard::generalPasteboard());
}
void Editor::pasteAsPlainTextWithPasteboard(Pasteboard* pasteboard)
{
String text = pasteboard->plainText(m_frame);
if (client() && client()->shouldInsertText(text, selectedRange().get(), EditorInsertActionPasted))
pasteAsPlainText(text, canSmartReplaceWithPasteboard(pasteboard));
}
#if !PLATFORM(MAC)
void Editor::pasteWithPasteboard(Pasteboard* pasteboard, bool allowPlainText)
{
RefPtr<Range> range = selectedRange();
bool chosePlainText;
RefPtr<DocumentFragment> fragment = pasteboard->documentFragment(m_frame, range, allowPlainText, chosePlainText);
if (fragment && shouldInsertFragment(fragment, range, EditorInsertActionPasted))
pasteAsFragment(fragment, canSmartReplaceWithPasteboard(pasteboard), chosePlainText);
}
#endif
bool Editor::canSmartReplaceWithPasteboard(Pasteboard* pasteboard)
{
return client() && client()->smartInsertDeleteEnabled() && pasteboard->canSmartReplace();
}
bool Editor::shouldInsertFragment(PassRefPtr<DocumentFragment> fragment, PassRefPtr<Range> replacingDOMRange, EditorInsertAction givenAction)
{
if (!client())
return false;
if (fragment) {
Node* child = fragment->firstChild();
if (child && fragment->lastChild() == child && child->isCharacterDataNode())
return client()->shouldInsertText(static_cast<CharacterData*>(child)->data(), replacingDOMRange.get(), givenAction);
}
return client()->shouldInsertNode(fragment.get(), replacingDOMRange.get(), givenAction);
}
void Editor::replaceSelectionWithFragment(PassRefPtr<DocumentFragment> fragment, bool selectReplacement, bool smartReplace, bool matchStyle)
{
if (m_frame->selection()->isNone() || !m_frame->selection()->isContentEditable() || !fragment)
return;
ReplaceSelectionCommand::CommandOptions options = ReplaceSelectionCommand::PreventNesting | ReplaceSelectionCommand::SanitizeFragment;
if (selectReplacement)
options |= ReplaceSelectionCommand::SelectReplacement;
if (smartReplace)
options |= ReplaceSelectionCommand::SmartReplace;
if (matchStyle)
options |= ReplaceSelectionCommand::MatchStyle;
applyCommand(ReplaceSelectionCommand::create(m_frame->document(), fragment, options, EditActionPaste));
revealSelectionAfterEditingOperation();
if (m_frame->selection()->isInPasswordField())
return;
Node* nodeToCheck = m_frame->selection()->rootEditableElement();
if (!nodeToCheck)
return;
RefPtr<Range> rangeToCheck = Range::create(m_frame->document(), firstPositionInNode(nodeToCheck), lastPositionInNode(nodeToCheck));
m_spellChecker->requestCheckingFor(SpellCheckRequest::create(resolveTextCheckingTypeMask(TextCheckingTypeSpelling | TextCheckingTypeGrammar), TextCheckingProcessBatch, rangeToCheck, rangeToCheck));
}
void Editor::replaceSelectionWithText(const String& text, bool selectReplacement, bool smartReplace)
{
replaceSelectionWithFragment(createFragmentFromText(selectedRange().get(), text), selectReplacement, smartReplace, true);
}
PassRefPtr<Range> Editor::selectedRange()
{
if (!m_frame)
return 0;
return m_frame->selection()->toNormalizedRange();
}
bool Editor::shouldDeleteRange(Range* range) const
{
ExceptionCode ec;
if (!range || range->collapsed(ec))
return false;
if (!canDeleteRange(range))
return false;
return client() && client()->shouldDeleteRange(range);
}
bool Editor::tryDHTMLCopy()
{
if (m_frame->selection()->isInPasswordField())
return false;
return !dispatchCPPEvent(eventNames().copyEvent, ClipboardWritable);
}
bool Editor::tryDHTMLCut()
{
if (m_frame->selection()->isInPasswordField())
return false;
return !dispatchCPPEvent(eventNames().cutEvent, ClipboardWritable);
}
bool Editor::tryDHTMLPaste()
{
return !dispatchCPPEvent(eventNames().pasteEvent, ClipboardReadable);
}
bool Editor::shouldInsertText(const String& text, Range* range, EditorInsertAction action) const
{
return client() && client()->shouldInsertText(text, range, action);
}
bool Editor::shouldShowDeleteInterface(HTMLElement* element) const
{
return client() && client()->shouldShowDeleteInterface(element);
}
void Editor::notifyComponentsOnChangedSelection(const VisibleSelection& oldSelection, FrameSelection::SetSelectionOptions options)
{
if (client())
client()->respondToChangedSelection(m_frame);
setStartNewKillRingSequence(true);
m_deleteButtonController->respondToChangedSelection(oldSelection);
m_alternativeTextController->respondToChangedSelection(oldSelection, options);
}
void Editor::respondToChangedContents(const VisibleSelection& endingSelection)
{
if (AXObjectCache::accessibilityEnabled()) {
Node* node = endingSelection.start().deprecatedNode();
if (node)
m_frame->document()->axObjectCache()->postNotification(node, AXObjectCache::AXValueChanged, false);
}
updateMarkersForWordsAffectedByEditing(true);
if (client())
client()->respondToChangedContents();
}
bool Editor::hasBidiSelection() const
{
if (m_frame->selection()->isNone())
return false;
Node* startNode;
if (m_frame->selection()->isRange()) {
startNode = m_frame->selection()->selection().start().downstream().deprecatedNode();
Node* endNode = m_frame->selection()->selection().end().upstream().deprecatedNode();
if (enclosingBlock(startNode) != enclosingBlock(endNode))
return false;
} else
startNode = m_frame->selection()->selection().visibleStart().deepEquivalent().deprecatedNode();
RenderObject* renderer = startNode->renderer();
while (renderer && !renderer->isRenderBlock())
renderer = renderer->parent();
if (!renderer)
return false;
RenderStyle* style = renderer->style();
if (!style->isLeftToRightDirection())
return true;
return toRenderBlock(renderer)->containsNonZeroBidiLevel();
}
TriState Editor::selectionUnorderedListState() const
{
if (m_frame->selection()->isCaret()) {
if (enclosingNodeWithTag(m_frame->selection()->selection().start(), ulTag))
return TrueTriState;
} else if (m_frame->selection()->isRange()) {
Node* startNode = enclosingNodeWithTag(m_frame->selection()->selection().start(), ulTag);
Node* endNode = enclosingNodeWithTag(m_frame->selection()->selection().end(), ulTag);
if (startNode && endNode && startNode == endNode)
return TrueTriState;
}
return FalseTriState;
}
TriState Editor::selectionOrderedListState() const
{
if (m_frame->selection()->isCaret()) {
if (enclosingNodeWithTag(m_frame->selection()->selection().start(), olTag))
return TrueTriState;
} else if (m_frame->selection()->isRange()) {
Node* startNode = enclosingNodeWithTag(m_frame->selection()->selection().start(), olTag);
Node* endNode = enclosingNodeWithTag(m_frame->selection()->selection().end(), olTag);
if (startNode && endNode && startNode == endNode)
return TrueTriState;
}
return FalseTriState;
}
PassRefPtr<Node> Editor::insertOrderedList()
{
if (!canEditRichly())
return 0;
RefPtr<Node> newList = InsertListCommand::insertList(m_frame->document(), InsertListCommand::OrderedList);
revealSelectionAfterEditingOperation();
return newList;
}
PassRefPtr<Node> Editor::insertUnorderedList()
{
if (!canEditRichly())
return 0;
RefPtr<Node> newList = InsertListCommand::insertList(m_frame->document(), InsertListCommand::UnorderedList);
revealSelectionAfterEditingOperation();
return newList;
}
bool Editor::canIncreaseSelectionListLevel()
{
return canEditRichly() && IncreaseSelectionListLevelCommand::canIncreaseSelectionListLevel(m_frame->document());
}
bool Editor::canDecreaseSelectionListLevel()
{
return canEditRichly() && DecreaseSelectionListLevelCommand::canDecreaseSelectionListLevel(m_frame->document());
}
PassRefPtr<Node> Editor::increaseSelectionListLevel()
{
if (!canEditRichly() || m_frame->selection()->isNone())
return 0;
RefPtr<Node> newList = IncreaseSelectionListLevelCommand::increaseSelectionListLevel(m_frame->document());
revealSelectionAfterEditingOperation();
return newList;
}
PassRefPtr<Node> Editor::increaseSelectionListLevelOrdered()
{
if (!canEditRichly() || m_frame->selection()->isNone())
return 0;
RefPtr<Node> newList = IncreaseSelectionListLevelCommand::increaseSelectionListLevelOrdered(m_frame->document());
revealSelectionAfterEditingOperation();
return newList.release();
}
PassRefPtr<Node> Editor::increaseSelectionListLevelUnordered()
{
if (!canEditRichly() || m_frame->selection()->isNone())
return 0;
RefPtr<Node> newList = IncreaseSelectionListLevelCommand::increaseSelectionListLevelUnordered(m_frame->document());
revealSelectionAfterEditingOperation();
return newList.release();
}
void Editor::decreaseSelectionListLevel()
{
if (!canEditRichly() || m_frame->selection()->isNone())
return;
DecreaseSelectionListLevelCommand::decreaseSelectionListLevel(m_frame->document());
revealSelectionAfterEditingOperation();
}
void Editor::removeFormattingAndStyle()
{
applyCommand(RemoveFormatCommand::create(m_frame->document()));
}
void Editor::clearLastEditCommand()
{
m_lastEditCommand.clear();
}
// Returns whether caller should continue with "the default processing", which is the same as
// the event handler NOT setting the return value to false
bool Editor::dispatchCPPEvent(const AtomicString &eventType, ClipboardAccessPolicy policy)
{
Node* target = findEventTargetFromSelection();
if (!target)
return true;
RefPtr<Clipboard> clipboard = newGeneralClipboard(policy, m_frame);
ExceptionCode ec = 0;
RefPtr<Event> evt = ClipboardEvent::create(eventType, true, true, clipboard);
target->dispatchEvent(evt, ec);
bool noDefaultProcessing = evt->defaultPrevented();
if (noDefaultProcessing && policy == ClipboardWritable) {
Pasteboard* pasteboard = Pasteboard::generalPasteboard();
pasteboard->clear();
pasteboard->writeClipboard(clipboard.get());
}
// invalidate clipboard here for security
clipboard->setAccessPolicy(ClipboardNumb);
return !noDefaultProcessing;
}
Node* Editor::findEventTargetFrom(const VisibleSelection& selection) const
{
Node* target = selection.start().element();
if (!target)
target = m_frame->document()->body();
if (!target)
return 0;
return target;
}
Node* Editor::findEventTargetFromSelection() const
{
return findEventTargetFrom(m_frame->selection()->selection());
}
void Editor::applyStyle(StylePropertySet* style, EditAction editingAction)
{
switch (m_frame->selection()->selectionType()) {
case VisibleSelection::NoSelection:
// do nothing
break;
case VisibleSelection::CaretSelection:
computeAndSetTypingStyle(style, editingAction);
break;
case VisibleSelection::RangeSelection:
if (style)
applyCommand(ApplyStyleCommand::create(m_frame->document(), EditingStyle::create(style).get(), editingAction));
break;
}
}
bool Editor::shouldApplyStyle(StylePropertySet* style, Range* range)
{
return client()->shouldApplyStyle(style, range);
}
void Editor::applyParagraphStyle(StylePropertySet* style, EditAction editingAction)
{
switch (m_frame->selection()->selectionType()) {
case VisibleSelection::NoSelection:
// do nothing
break;
case VisibleSelection::CaretSelection:
case VisibleSelection::RangeSelection:
if (style)
applyCommand(ApplyStyleCommand::create(m_frame->document(), EditingStyle::create(style).get(), editingAction, ApplyStyleCommand::ForceBlockProperties));
break;
}
}
void Editor::applyStyleToSelection(StylePropertySet* style, EditAction editingAction)
{
if (!style || style->isEmpty() || !canEditRichly())
return;
if (client() && client()->shouldApplyStyle(style, m_frame->selection()->toNormalizedRange().get()))
applyStyle(style, editingAction);
}
void Editor::applyParagraphStyleToSelection(StylePropertySet* style, EditAction editingAction)
{
if (!style || style->isEmpty() || !canEditRichly())
return;
if (client() && client()->shouldApplyStyle(style, m_frame->selection()->toNormalizedRange().get()))
applyParagraphStyle(style, editingAction);
}
bool Editor::selectionStartHasStyle(CSSPropertyID propertyID, const String& value) const
{
return EditingStyle::create(propertyID, value)->triStateOfStyle(
EditingStyle::styleAtSelectionStart(m_frame->selection()->selection(), propertyID == CSSPropertyBackgroundColor).get());
}
TriState Editor::selectionHasStyle(CSSPropertyID propertyID, const String& value) const
{
return EditingStyle::create(propertyID, value)->triStateOfStyle(m_frame->selection()->selection());
}
String Editor::selectionStartCSSPropertyValue(CSSPropertyID propertyID)
{
RefPtr<EditingStyle> selectionStyle = EditingStyle::styleAtSelectionStart(m_frame->selection()->selection(),
propertyID == CSSPropertyBackgroundColor);
if (!selectionStyle || !selectionStyle->style())
return String();
if (propertyID == CSSPropertyFontSize)
return String::number(selectionStyle->legacyFontSize(m_frame->document()));
return selectionStyle->style()->getPropertyValue(propertyID);
}
void Editor::indent()
{
applyCommand(IndentOutdentCommand::create(m_frame->document(), IndentOutdentCommand::Indent));
}
void Editor::outdent()
{
applyCommand(IndentOutdentCommand::create(m_frame->document(), IndentOutdentCommand::Outdent));
}
static void dispatchEditableContentChangedEvents(Element* startRoot, Element* endRoot)
{
ExceptionCode ec;
if (startRoot)
startRoot->dispatchEvent(Event::create(eventNames().webkitEditableContentChangedEvent, false, false), ec);
if (endRoot && endRoot != startRoot)
endRoot->dispatchEvent(Event::create(eventNames().webkitEditableContentChangedEvent, false, false), ec);
}
void Editor::appliedEditing(PassRefPtr<CompositeEditCommand> cmd)
{
m_frame->document()->updateLayout();
EditCommandComposition* composition = cmd->composition();
ASSERT(composition);
dispatchEditableContentChangedEvents(composition->startingRootEditableElement(), composition->endingRootEditableElement());
VisibleSelection newSelection(cmd->endingSelection());
m_alternativeTextController->respondToAppliedEditing(cmd.get());
// Don't clear the typing style with this selection change. We do those things elsewhere if necessary.
FrameSelection::SetSelectionOptions options = cmd->isDictationCommand() ? FrameSelection::DictationTriggered : 0;
changeSelectionAfterCommand(newSelection, options);
if (!cmd->preservesTypingStyle())
m_frame->selection()->clearTypingStyle();
// Command will be equal to last edit command only in the case of typing
if (m_lastEditCommand.get() == cmd)
ASSERT(cmd->isTypingCommand());
else {
// Only register a new undo command if the command passed in is
// different from the last command
m_lastEditCommand = cmd;
#if !ENABLE(UNDO_MANAGER)
if (client())
client()->registerUndoStep(m_lastEditCommand->ensureComposition());
#else
m_frame->document()->undoManager()->registerUndoStep(m_lastEditCommand->ensureComposition());
#endif
}
respondToChangedContents(newSelection);
}
void Editor::unappliedEditing(PassRefPtr<EditCommandComposition> cmd)
{
m_frame->document()->updateLayout();
dispatchEditableContentChangedEvents(cmd->startingRootEditableElement(), cmd->endingRootEditableElement());
VisibleSelection newSelection(cmd->startingSelection());
changeSelectionAfterCommand(newSelection, FrameSelection::CloseTyping | FrameSelection::ClearTypingStyle);
m_alternativeTextController->respondToUnappliedEditing(cmd.get());
m_lastEditCommand = 0;
#if !ENABLE(UNDO_MANAGER)
if (client())
client()->registerRedoStep(cmd);
#else
m_frame->document()->undoManager()->registerRedoStep(cmd);
#endif
respondToChangedContents(newSelection);
}
void Editor::reappliedEditing(PassRefPtr<EditCommandComposition> cmd)
{
m_frame->document()->updateLayout();
dispatchEditableContentChangedEvents(cmd->startingRootEditableElement(), cmd->endingRootEditableElement());
VisibleSelection newSelection(cmd->endingSelection());
changeSelectionAfterCommand(newSelection, FrameSelection::CloseTyping | FrameSelection::ClearTypingStyle);
m_lastEditCommand = 0;
#if !ENABLE(UNDO_MANAGER)
if (client())
client()->registerUndoStep(cmd);
#else
m_frame->document()->undoManager()->registerUndoStep(cmd);
#endif
respondToChangedContents(newSelection);
}
Editor::Editor(Frame* frame)
: FrameDestructionObserver(frame)
, m_deleteButtonController(adoptPtr(new DeleteButtonController(frame)))
, m_ignoreCompositionSelectionChange(false)
, m_shouldStartNewKillRingSequence(false)
// This is off by default, since most editors want this behavior (this matches IE but not FF).
, m_shouldStyleWithCSS(false)
, m_killRing(adoptPtr(new KillRing))
, m_spellChecker(adoptPtr(new SpellChecker(frame)))
, m_alternativeTextController(adoptPtr(new AlternativeTextController(frame)))
, m_areMarkedTextMatchesHighlighted(false)
, m_defaultParagraphSeparator(EditorParagraphSeparatorIsDiv)
{
}
Editor::~Editor()
{
}
void Editor::clear()
{
m_compositionNode = 0;
m_customCompositionUnderlines.clear();
m_shouldStyleWithCSS = false;
m_defaultParagraphSeparator = EditorParagraphSeparatorIsDiv;
}
bool Editor::insertText(const String& text, Event* triggeringEvent)
{
return m_frame->eventHandler()->handleTextInputEvent(text, triggeringEvent);
}
bool Editor::insertTextForConfirmedComposition(const String& text)
{
return m_frame->eventHandler()->handleTextInputEvent(text, 0, TextEventInputComposition);
}
bool Editor::insertDictatedText(const String& text, const Vector<DictationAlternative>& dictationAlternatives, Event* triggeringEvent)
{
return m_alternativeTextController->insertDictatedText(text, dictationAlternatives, triggeringEvent);
}
bool Editor::insertTextWithoutSendingTextEvent(const String& text, bool selectInsertedText, TextEvent* triggeringEvent)
{
if (text.isEmpty())
return false;
VisibleSelection selection = selectionForCommand(triggeringEvent);
if (!selection.isContentEditable())
return false;
RefPtr<Range> range = selection.toNormalizedRange();
if (!shouldInsertText(text, range.get(), EditorInsertActionTyped))
return true;
if (!text.isEmpty())
updateMarkersForWordsAffectedByEditing(isSpaceOrNewline(text[0]));
bool shouldConsiderApplyingAutocorrection = false;
if (text == " " || text == "\t")
shouldConsiderApplyingAutocorrection = true;
if (text.length() == 1 && isPunct(text[0]) && !isAmbiguousBoundaryCharacter(text[0]))
shouldConsiderApplyingAutocorrection = true;
bool autocorrectionWasApplied = shouldConsiderApplyingAutocorrection && m_alternativeTextController->applyAutocorrectionBeforeTypingIfAppropriate();
// Get the selection to use for the event that triggered this insertText.
// If the event handler changed the selection, we may want to use a different selection
// that is contained in the event target.
selection = selectionForCommand(triggeringEvent);
if (selection.isContentEditable()) {
if (Node* selectionStart = selection.start().deprecatedNode()) {
RefPtr<Document> document = selectionStart->document();
// Insert the text
if (triggeringEvent && triggeringEvent->isDictation())
DictationCommand::insertText(document.get(), text, triggeringEvent->dictationAlternatives(), selection);
else {
TypingCommand::Options options = 0;
if (selectInsertedText)
options |= TypingCommand::SelectInsertedText;
if (autocorrectionWasApplied)
options |= TypingCommand::RetainAutocorrectionIndicator;
TypingCommand::insertText(document.get(), text, selection, options, triggeringEvent && triggeringEvent->isComposition() ? TypingCommand::TextCompositionConfirm : TypingCommand::TextCompositionNone);
}
// Reveal the current selection
if (Frame* editedFrame = document->frame())
if (Page* page = editedFrame->page())
page->focusController()->focusedOrMainFrame()->selection()->revealSelection(ScrollAlignment::alignCenterIfNeeded);
}
}
return true;
}
bool Editor::insertLineBreak()
{
if (!canEdit())
return false;
if (!shouldInsertText("\n", m_frame->selection()->toNormalizedRange().get(), EditorInsertActionTyped))
return true;
VisiblePosition caret = m_frame->selection()->selection().visibleStart();
bool alignToEdge = isEndOfEditableOrNonEditableContent(caret);
bool autocorrectionIsApplied = m_alternativeTextController->applyAutocorrectionBeforeTypingIfAppropriate();
TypingCommand::insertLineBreak(m_frame->document(), autocorrectionIsApplied ? TypingCommand::RetainAutocorrectionIndicator : 0);
revealSelectionAfterEditingOperation(alignToEdge ? ScrollAlignment::alignToEdgeIfNeeded : ScrollAlignment::alignCenterIfNeeded);
return true;
}
bool Editor::insertParagraphSeparator()
{
if (!canEdit())
return false;
if (!canEditRichly())
return insertLineBreak();
if (!shouldInsertText("\n", m_frame->selection()->toNormalizedRange().get(), EditorInsertActionTyped))
return true;
VisiblePosition caret = m_frame->selection()->selection().visibleStart();
bool alignToEdge = isEndOfEditableOrNonEditableContent(caret);
bool autocorrectionIsApplied = m_alternativeTextController->applyAutocorrectionBeforeTypingIfAppropriate();
TypingCommand::insertParagraphSeparator(m_frame->document(), autocorrectionIsApplied ? TypingCommand::RetainAutocorrectionIndicator : 0);
revealSelectionAfterEditingOperation(alignToEdge ? ScrollAlignment::alignToEdgeIfNeeded : ScrollAlignment::alignCenterIfNeeded);
return true;
}
void Editor::cut()
{
if (tryDHTMLCut())
return; // DHTML did the whole operation
if (!canCut()) {
systemBeep();
return;
}
RefPtr<Range> selection = selectedRange();
if (shouldDeleteRange(selection.get())) {
updateMarkersForWordsAffectedByEditing(true);