/*
* Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
*
* 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 "ReplaceSelectionCommand.h"
#include "ApplyStyleCommand.h"
#include "BeforeTextInsertedEvent.h"
#include "BreakBlockquoteCommand.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSMutableStyleDeclaration.h"
#include "CSSProperty.h"
#include "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "Document.h"
#include "DocumentFragment.h"
#include "EditingText.h"
#include "Element.h"
#include "EventNames.h"
#include "Frame.h"
#include "HTMLElement.h"
#include "HTMLInputElement.h"
#include "HTMLInterchange.h"
#include "HTMLNames.h"
#include "SelectionController.h"
#include "SmartReplace.h"
#include "TextIterator.h"
#include "htmlediting.h"
#include "markup.h"
#include "visible_units.h"
#include <wtf/StdLibExtras.h>
namespace WebCore {
using namespace HTMLNames;
enum EFragmentType { EmptyFragment, SingleTextNodeFragment, TreeFragment };
// --- ReplacementFragment helper class
class ReplacementFragment : public Noncopyable {
public:
ReplacementFragment(Document*, DocumentFragment*, bool matchStyle, const VisibleSelection&);
Node* firstChild() const;
Node* lastChild() const;
bool isEmpty() const;
bool hasInterchangeNewlineAtStart() const { return m_hasInterchangeNewlineAtStart; }
bool hasInterchangeNewlineAtEnd() const { return m_hasInterchangeNewlineAtEnd; }
void removeNode(PassRefPtr<Node>);
void removeNodePreservingChildren(Node*);
private:
PassRefPtr<Node> insertFragmentForTestRendering(Node* context);
void removeUnrenderedNodes(Node*);
void restoreTestRenderingNodesToFragment(Node*);
void removeInterchangeNodes(Node*);
void insertNodeBefore(PassRefPtr<Node> node, Node* refNode);
RefPtr<Document> m_document;
RefPtr<DocumentFragment> m_fragment;
bool m_matchStyle;
bool m_hasInterchangeNewlineAtStart;
bool m_hasInterchangeNewlineAtEnd;
};
static bool isInterchangeNewlineNode(const Node *node)
{
DEFINE_STATIC_LOCAL(String, interchangeNewlineClassString, (AppleInterchangeNewline));
return node && node->hasTagName(brTag) &&
static_cast<const Element *>(node)->getAttribute(classAttr) == interchangeNewlineClassString;
}
static bool isInterchangeConvertedSpaceSpan(const Node *node)
{
DEFINE_STATIC_LOCAL(String, convertedSpaceSpanClassString, (AppleConvertedSpace));
return node->isHTMLElement() &&
static_cast<const HTMLElement *>(node)->getAttribute(classAttr) == convertedSpaceSpanClassString;
}
ReplacementFragment::ReplacementFragment(Document* document, DocumentFragment* fragment, bool matchStyle, const VisibleSelection& selection)
: m_document(document),
m_fragment(fragment),
m_matchStyle(matchStyle),
m_hasInterchangeNewlineAtStart(false),
m_hasInterchangeNewlineAtEnd(false)
{
if (!m_document)
return;
if (!m_fragment)
return;
if (!m_fragment->firstChild())
return;
Element* editableRoot = selection.rootEditableElement();
ASSERT(editableRoot);
if (!editableRoot)
return;
Node* shadowAncestorNode = editableRoot->shadowAncestorNode();
if (!editableRoot->getAttributeEventListener(eventNames().webkitBeforeTextInsertedEvent) &&
// FIXME: Remove these checks once textareas and textfields actually register an event handler.
!(shadowAncestorNode && shadowAncestorNode->renderer() && shadowAncestorNode->renderer()->isTextControl()) &&
editableRoot->isContentRichlyEditable()) {
removeInterchangeNodes(m_fragment.get());
return;
}
Node* styleNode = selection.base().node();
RefPtr<Node> holder = insertFragmentForTestRendering(styleNode);
RefPtr<Range> range = VisibleSelection::selectionFromContentsOfNode(holder.get()).toNormalizedRange();
String text = plainText(range.get());
// Give the root a chance to change the text.
RefPtr<BeforeTextInsertedEvent> evt = BeforeTextInsertedEvent::create(text);
ExceptionCode ec = 0;
editableRoot->dispatchEvent(evt, ec);
ASSERT(ec == 0);
if (text != evt->text() || !editableRoot->isContentRichlyEditable()) {
restoreTestRenderingNodesToFragment(holder.get());
removeNode(holder);
m_fragment = createFragmentFromText(selection.toNormalizedRange().get(), evt->text());
if (!m_fragment->firstChild())
return;
holder = insertFragmentForTestRendering(styleNode);
}
removeInterchangeNodes(holder.get());
removeUnrenderedNodes(holder.get());
restoreTestRenderingNodesToFragment(holder.get());
removeNode(holder);
}
bool ReplacementFragment::isEmpty() const
{
return (!m_fragment || !m_fragment->firstChild()) && !m_hasInterchangeNewlineAtStart && !m_hasInterchangeNewlineAtEnd;
}
Node *ReplacementFragment::firstChild() const
{
return m_fragment ? m_fragment->firstChild() : 0;
}
Node *ReplacementFragment::lastChild() const
{
return m_fragment ? m_fragment->lastChild() : 0;
}
void ReplacementFragment::removeNodePreservingChildren(Node *node)
{
if (!node)
return;
while (RefPtr<Node> n = node->firstChild()) {
removeNode(n);
insertNodeBefore(n.release(), node);
}
removeNode(node);
}
void ReplacementFragment::removeNode(PassRefPtr<Node> node)
{
if (!node)
return;
Node *parent = node->parentNode();
if (!parent)
return;
ExceptionCode ec = 0;
parent->removeChild(node.get(), ec);
ASSERT(ec == 0);
}
void ReplacementFragment::insertNodeBefore(PassRefPtr<Node> node, Node* refNode)
{
if (!node || !refNode)
return;
Node* parent = refNode->parentNode();
if (!parent)
return;
ExceptionCode ec = 0;
parent->insertBefore(node, refNode, ec);
ASSERT(ec == 0);
}
PassRefPtr<Node> ReplacementFragment::insertFragmentForTestRendering(Node* context)
{
Node* body = m_document->body();
if (!body)
return 0;
RefPtr<StyledElement> holder = createDefaultParagraphElement(m_document.get());
ExceptionCode ec = 0;
// Copy the whitespace and user-select style from the context onto this element.
// FIXME: We should examine other style properties to see if they would be appropriate to consider during the test rendering.
Node* n = context;
while (n && !n->isElementNode())
n = n->parentNode();
if (n) {
RefPtr<CSSComputedStyleDeclaration> conFontStyle = computedStyle(n);
CSSStyleDeclaration* style = holder->style();
style->setProperty(CSSPropertyWhiteSpace, conFontStyle->getPropertyValue(CSSPropertyWhiteSpace), false, ec);
ASSERT(ec == 0);
style->setProperty(CSSPropertyWebkitUserSelect, conFontStyle->getPropertyValue(CSSPropertyWebkitUserSelect), false, ec);
ASSERT(ec == 0);
}
holder->appendChild(m_fragment, ec);
ASSERT(ec == 0);
body->appendChild(holder.get(), ec);
ASSERT(ec == 0);
m_document->updateLayoutIgnorePendingStylesheets();
return holder.release();
}
void ReplacementFragment::restoreTestRenderingNodesToFragment(Node *holder)
{
if (!holder)
return;
ExceptionCode ec = 0;
while (RefPtr<Node> node = holder->firstChild()) {
holder->removeChild(node.get(), ec);
ASSERT(ec == 0);
m_fragment->appendChild(node.get(), ec);
ASSERT(ec == 0);
}
}
void ReplacementFragment::removeUnrenderedNodes(Node* holder)
{
Vector<Node*> unrendered;
for (Node* node = holder->firstChild(); node; node = node->traverseNextNode(holder))
if (!isNodeRendered(node) && !isTableStructureNode(node))
unrendered.append(node);
size_t n = unrendered.size();
for (size_t i = 0; i < n; ++i)
removeNode(unrendered[i]);
}
void ReplacementFragment::removeInterchangeNodes(Node* container)
{
// Interchange newlines at the "start" of the incoming fragment must be
// either the first node in the fragment or the first leaf in the fragment.
Node* node = container->firstChild();
while (node) {
if (isInterchangeNewlineNode(node)) {
m_hasInterchangeNewlineAtStart = true;
removeNode(node);
break;
}
node = node->firstChild();
}
if (!container->hasChildNodes())
return;
// Interchange newlines at the "end" of the incoming fragment must be
// either the last node in the fragment or the last leaf in the fragment.
node = container->lastChild();
while (node) {
if (isInterchangeNewlineNode(node)) {
m_hasInterchangeNewlineAtEnd = true;
removeNode(node);
break;
}
node = node->lastChild();
}
node = container->firstChild();
while (node) {
Node *next = node->traverseNextNode();
if (isInterchangeConvertedSpaceSpan(node)) {
RefPtr<Node> n = 0;
while ((n = node->firstChild())) {
removeNode(n);
insertNodeBefore(n, node);
}
removeNode(node);
if (n)
next = n->traverseNextNode();
}
node = next;
}
}
ReplaceSelectionCommand::ReplaceSelectionCommand(Document* document, PassRefPtr<DocumentFragment> fragment,
bool selectReplacement, bool smartReplace, bool matchStyle, bool preventNesting, bool movingParagraph,
EditAction editAction)
: CompositeEditCommand(document),
m_selectReplacement(selectReplacement),
m_smartReplace(smartReplace),
m_matchStyle(matchStyle),
m_documentFragment(fragment),
m_preventNesting(preventNesting),
m_movingParagraph(movingParagraph),
m_editAction(editAction),
m_shouldMergeEnd(false)
{
}
static bool hasMatchingQuoteLevel(VisiblePosition endOfExistingContent, VisiblePosition endOfInsertedContent)
{
Position existing = endOfExistingContent.deepEquivalent();
Position inserted = endOfInsertedContent.deepEquivalent();
bool isInsideMailBlockquote = nearestMailBlockquote(inserted.node());
return isInsideMailBlockquote && (numEnclosingMailBlockquotes(existing) == numEnclosingMailBlockquotes(inserted));
}
bool ReplaceSelectionCommand::shouldMergeStart(bool selectionStartWasStartOfParagraph, bool fragmentHasInterchangeNewlineAtStart, bool selectionStartWasInsideMailBlockquote)
{
if (m_movingParagraph)
return false;
VisiblePosition startOfInsertedContent(positionAtStartOfInsertedContent());
VisiblePosition prev = startOfInsertedContent.previous(true);
if (prev.isNull())
return false;
// When we have matching quote levels, its ok to merge more frequently.
// For a successful merge, we still need to make sure that the inserted content starts with the beginning of a paragraph.
// And we should only merge here if the selection start was inside a mail blockquote. This prevents against removing a
// blockquote from newly pasted quoted content that was pasted into an unquoted position. If that unquoted position happens
// to be right after another blockquote, we don't want to merge and risk stripping a valid block (and newline) from the pasted content.
if (isStartOfParagraph(startOfInsertedContent) && selectionStartWasInsideMailBlockquote && hasMatchingQuoteLevel(prev, positionAtEndOfInsertedContent()))
return true;
return !selectionStartWasStartOfParagraph &&
!fragmentHasInterchangeNewlineAtStart &&
isStartOfParagraph(startOfInsertedContent) &&
!startOfInsertedContent.deepEquivalent().node()->hasTagName(brTag) &&
shouldMerge(startOfInsertedContent, prev);
}
bool ReplaceSelectionCommand::shouldMergeEnd(bool selectionEndWasEndOfParagraph)
{
VisiblePosition endOfInsertedContent(positionAtEndOfInsertedContent());
VisiblePosition next = endOfInsertedContent.next(true);
if (next.isNull())
return false;
return !selectionEndWasEndOfParagraph &&
isEndOfParagraph(endOfInsertedContent) &&
!endOfInsertedContent.deepEquivalent().node()->hasTagName(brTag) &&
shouldMerge(endOfInsertedContent, next);
}
static bool isMailPasteAsQuotationNode(const Node* node)
{
return node && node->hasTagName(blockquoteTag) && node->isElementNode() && static_cast<const Element*>(node)->getAttribute(classAttr) == ApplePasteAsQuotation;
}
// Wrap CompositeEditCommand::removeNodePreservingChildren() so we can update the nodes we track
void ReplaceSelectionCommand::removeNodePreservingChildren(Node* node)
{
if (m_firstNodeInserted == node)
m_firstNodeInserted = node->traverseNextNode();
if (m_lastLeafInserted == node)
m_lastLeafInserted = node->lastChild() ? node->lastChild() : node->traverseNextSibling();
CompositeEditCommand::removeNodePreservingChildren(node);
}
// Wrap CompositeEditCommand::removeNodeAndPruneAncestors() so we can update the nodes we track
void ReplaceSelectionCommand::removeNodeAndPruneAncestors(Node* node)
{
// prepare in case m_firstNodeInserted and/or m_lastLeafInserted get removed
// FIXME: shouldn't m_lastLeafInserted be adjusted using traversePreviousNode()?
Node* afterFirst = m_firstNodeInserted ? m_firstNodeInserted->traverseNextSibling() : 0;
Node* afterLast = m_lastLeafInserted ? m_lastLeafInserted->traverseNextSibling() : 0;
CompositeEditCommand::removeNodeAndPruneAncestors(node);
// adjust m_firstNodeInserted and m_lastLeafInserted since either or both may have been removed
if (m_lastLeafInserted && !m_lastLeafInserted->inDocument())
m_lastLeafInserted = afterLast;
if (m_firstNodeInserted && !m_firstNodeInserted->inDocument())
m_firstNodeInserted = m_lastLeafInserted && m_lastLeafInserted->inDocument() ? afterFirst : 0;
}
static bool isHeaderElement(Node* a)
{
if (!a)
return false;
return a->hasTagName(h1Tag) ||
a->hasTagName(h2Tag) ||
a->hasTagName(h3Tag) ||
a->hasTagName(h4Tag) ||
a->hasTagName(h5Tag);
}
static bool haveSameTagName(Node* a, Node* b)
{
return a && b && a->isElementNode() && b->isElementNode() && static_cast<Element*>(a)->tagName() == static_cast<Element*>(b)->tagName();
}
bool ReplaceSelectionCommand::shouldMerge(const VisiblePosition& source, const VisiblePosition& destination)
{
if (source.isNull() || destination.isNull())
return false;
Node* sourceNode = source.deepEquivalent().node();
Node* destinationNode = destination.deepEquivalent().node();
Node* sourceBlock = enclosingBlock(sourceNode);
Node* destinationBlock = enclosingBlock(destinationNode);
return !enclosingNodeOfType(source.deepEquivalent(), &isMailPasteAsQuotationNode) &&
sourceBlock && (!sourceBlock->hasTagName(blockquoteTag) || isMailBlockquote(sourceBlock)) &&
enclosingListChild(sourceBlock) == enclosingListChild(destinationNode) &&
enclosingTableCell(source.deepEquivalent()) == enclosingTableCell(destination.deepEquivalent()) &&
(!isHeaderElement(sourceBlock) || haveSameTagName(sourceBlock, destinationBlock)) &&
// Don't merge to or from a position before or after a block because it would
// be a no-op and cause infinite recursion.
!isBlock(sourceNode) && !isBlock(destinationNode);
}
// Style rules that match just inserted elements could change their appearance, like
// a div inserted into a document with div { display:inline; }.
void ReplaceSelectionCommand::negateStyleRulesThatAffectAppearance()
{
for (RefPtr<Node> node = m_firstNodeInserted.get(); node; node = node->traverseNextNode()) {
// FIXME: <rdar://problem/5371536> Style rules that match pasted content can change it's appearance
if (isStyleSpan(node.get())) {
HTMLElement* e = static_cast<HTMLElement*>(node.get());
// There are other styles that style rules can give to style spans,
// but these are the two important ones because they'll prevent
// inserted content from appearing in the right paragraph.
// FIXME: Hyatt is concerned that selectively using display:inline will give inconsistent
// results. We already know one issue because td elements ignore their display property
// in quirks mode (which Mail.app is always in). We should look for an alternative.
if (isBlock(e))
e->getInlineStyleDecl()->setProperty(CSSPropertyDisplay, CSSValueInline);
if (e->renderer() && e->renderer()->style()->floating() != FNONE)
e->getInlineStyleDecl()->setProperty(CSSPropertyFloat, CSSValueNone);
}
if (node == m_lastLeafInserted)
break;
}
}
void ReplaceSelectionCommand::removeUnrenderedTextNodesAtEnds()
{
document()->updateLayoutIgnorePendingStylesheets();
if (!m_lastLeafInserted->renderer() &&
m_lastLeafInserted->isTextNode() &&
!enclosingNodeWithTag(Position(m_lastLeafInserted.get(), 0), selectTag) &&
!enclosingNodeWithTag(Position(m_lastLeafInserted.get(), 0), scriptTag)) {
if (m_firstNodeInserted == m_lastLeafInserted) {
removeNode(m_lastLeafInserted.get());
m_lastLeafInserted = 0;
m_firstNodeInserted = 0;
return;
}
RefPtr<Node> previous = m_lastLeafInserted->traversePreviousNode();
removeNode(m_lastLeafInserted.get());
m_lastLeafInserted = previous;
}
// We don't have to make sure that m_firstNodeInserted isn't inside a select or script element, because
// it is a top level node in the fragment and the user can't insert into those elements.
if (!m_firstNodeInserted->renderer() &&
m_firstNodeInserted->isTextNode()) {
if (m_firstNodeInserted == m_lastLeafInserted) {
removeNode(m_firstNodeInserted.get());
m_firstNodeInserted = 0;
m_lastLeafInserted = 0;
return;
}
RefPtr<Node> next = m_firstNodeInserted->traverseNextSibling();
removeNode(m_firstNodeInserted.get());
m_firstNodeInserted = next;
}
}
void ReplaceSelectionCommand::handlePasteAsQuotationNode()
{
Node* node = m_firstNodeInserted.get();
if (isMailPasteAsQuotationNode(node))
removeNodeAttribute(static_cast<Element*>(node), classAttr);
}
VisiblePosition ReplaceSelectionCommand::positionAtEndOfInsertedContent()
{
Node* lastNode = m_lastLeafInserted.get();
// FIXME: Why is this hack here? What's special about <select> tags?
Node* enclosingSelect = enclosingNodeWithTag(firstDeepEditingPositionForNode(lastNode), selectTag);
if (enclosingSelect)
lastNode = enclosingSelect;
return lastDeepEditingPositionForNode(lastNode);
}
VisiblePosition ReplaceSelectionCommand::positionAtStartOfInsertedContent()
{
// Return the inserted content's first VisiblePosition.
return VisiblePosition(nextCandidate(positionInParentBeforeNode(m_firstNodeInserted.get())));
}
// Remove style spans before insertion if they are unnecessary. It's faster because we'll
// avoid doing a layout.
static bool handleStyleSpansBeforeInsertion(ReplacementFragment& fragment, const Position& insertionPos)
{
Node* topNode = fragment.firstChild();
// Handling the case where we are doing Paste as Quotation or pasting into quoted content is more complicated (see handleStyleSpans)
// and doesn't receive the optimization.
if (isMailPasteAsQuotationNode(topNode) || nearestMailBlockquote(topNode))
return false;
// Either there are no style spans in the fragment or a WebKit client has added content to the fragment
// before inserting it. Look for and handle style spans after insertion.
if (!isStyleSpan(topNode))
return false;
Node* sourceDocumentStyleSpan = topNode;
RefPtr<Node> copiedRangeStyleSpan = sourceDocumentStyleSpan->firstChild();
RefPtr<CSSMutableStyleDeclaration> styleAtInsertionPos = editingStyleAtPosition(rangeCompliantEquivalent(insertionPos));
String styleText = styleAtInsertionPos->cssText();
if (styleText == static_cast<Element*>(sourceDocumentStyleSpan)->getAttribute(styleAttr)) {
fragment.removeNodePreservingChildren(sourceDocumentStyleSpan);
if (!isStyleSpan(copiedRangeStyleSpan.get()))
return true;
}
if (isStyleSpan(copiedRangeStyleSpan.get()) && styleText == static_cast<Element*>(copiedRangeStyleSpan.get())->getAttribute(styleAttr)) {
fragment.removeNodePreservingChildren(copiedRangeStyleSpan.get());
return true;
}
return false;
}
// At copy time, WebKit wraps copied content in a span that contains the source document's
// default styles. If the copied Range inherits any other styles from its ancestors, we put
// those styles on a second span.
// This function removes redundant styles from those spans, and removes the spans if all their
// styles are redundant.
// We should remove the Apple-style-span class when we're done, see <rdar://problem/5685600>.
// We should remove styles from spans that are overridden by all of their children, either here
// or at copy time.
void ReplaceSelectionCommand::handleStyleSpans()
{
Node* sourceDocumentStyleSpan = 0;
Node* copiedRangeStyleSpan = 0;
// The style span that contains the source document's default style should be at
// the top of the fragment, but Mail sometimes adds a wrapper (for Paste As Quotation),
// so search for the top level style span instead of assuming it's at the top.
for (Node* node = m_firstNodeInserted.get(); node; node = node->traverseNextNode()) {
if (isStyleSpan(node)) {
sourceDocumentStyleSpan = node;
// If the copied Range's common ancestor had user applied inheritable styles
// on it, they'll be on a second style span, just below the one that holds the
// document defaults.
if (isStyleSpan(node->firstChild()))
copiedRangeStyleSpan = node->firstChild();
break;
}
}
// There might not be any style spans if we're pasting from another application or if
// we are here because of a document.execCommand("InsertHTML", ...) call.
if (!sourceDocumentStyleSpan)
return;
RefPtr<CSSMutableStyleDeclaration> sourceDocumentStyle = static_cast<HTMLElement*>(sourceDocumentStyleSpan)->getInlineStyleDecl()->copy();
Node* context = sourceDocumentStyleSpan->parentNode();
// If Mail wraps the fragment with a Paste as Quotation blockquote, or if you're pasting into a quoted region,
// styles from blockquoteNode are allowed to override those from the source document, see <rdar://problem/4930986> and <rdar://problem/5089327>.
Node* blockquoteNode = isMailPasteAsQuotationNode(context) ? context : nearestMailBlockquote(context);
if (blockquoteNode) {
RefPtr<CSSMutableStyleDeclaration> blockquoteStyle = editingStyleAtPosition(Position(blockquoteNode, 0));
RefPtr<CSSMutableStyleDeclaration> parentStyle = editingStyleAtPosition(Position(blockquoteNode->parentNode(), 0));
parentStyle->diff(blockquoteStyle.get());
CSSMutableStyleDeclaration::const_iterator end = blockquoteStyle->end();
for (CSSMutableStyleDeclaration::const_iterator it = blockquoteStyle->begin(); it != end; ++it) {
const CSSProperty& property = *it;
sourceDocumentStyle->removeProperty(property.id());
}
context = blockquoteNode->parentNode();
}
// This operation requires that only editing styles to be removed from sourceDocumentStyle.
prepareEditingStyleToApplyAt(sourceDocumentStyle.get(), Position(context, 0));
// Remove block properties in the span's style. This prevents properties that probably have no effect
// currently from affecting blocks later if the style is cloned for a new block element during a future
// editing operation.
// FIXME: They *can* have an effect currently if blocks beneath the style span aren't individually marked
// with block styles by the editing engine used to style them. WebKit doesn't do this, but others might.
sourceDocumentStyle->removeBlockProperties();
// The styles on sourceDocumentStyleSpan are all redundant, and there is no copiedRangeStyleSpan
// to consider. We're finished.
if (sourceDocumentStyle->length() == 0 && !copiedRangeStyleSpan) {
removeNodePreservingChildren(sourceDocumentStyleSpan);
return;
}
// There are non-redundant styles on sourceDocumentStyleSpan, but there is no
// copiedRangeStyleSpan. Clear the redundant styles from sourceDocumentStyleSpan
// and return.
if (sourceDocumentStyle->length() > 0 && !copiedRangeStyleSpan) {
setNodeAttribute(static_cast<Element*>(sourceDocumentStyleSpan), styleAttr, sourceDocumentStyle->cssText());
return;
}
RefPtr<CSSMutableStyleDeclaration> copiedRangeStyle = static_cast<HTMLElement*>(copiedRangeStyleSpan)->getInlineStyleDecl()->copy();
// We're going to put sourceDocumentStyleSpan's non-redundant styles onto copiedRangeStyleSpan,
// as long as they aren't overridden by ones on copiedRangeStyleSpan.
sourceDocumentStyle->merge(copiedRangeStyle.get(), true);
copiedRangeStyle = sourceDocumentStyle;
removeNodePreservingChildren(sourceDocumentStyleSpan);
// Remove redundant styles.
context = copiedRangeStyleSpan->parentNode();
prepareEditingStyleToApplyAt(copiedRangeStyle.get(), Position(context, 0));
// See the comments above about removing block properties.
copiedRangeStyle->removeBlockProperties();
// All the styles on copiedRangeStyleSpan are redundant, remove it.
if (copiedRangeStyle->length() == 0) {
removeNodePreservingChildren(copiedRangeStyleSpan);
return;
}
// Clear the redundant styles from the span's style attribute.
// FIXME: If font-family:-webkit-monospace is non-redundant, then the font-size should stay, even if it
// appears redundant.
setNodeAttribute(static_cast<Element*>(copiedRangeStyleSpan), styleAttr, copiedRangeStyle->cssText());
}
void ReplaceSelectionCommand::mergeEndIfNeeded()
{
if (!m_shouldMergeEnd)
return;
VisiblePosition startOfInsertedContent(positionAtStartOfInsertedContent());
VisiblePosition endOfInsertedContent(positionAtEndOfInsertedContent());
// Bail to avoid infinite recursion.
if (m_movingParagraph) {
ASSERT_NOT_REACHED();
return;
}
// Merging two paragraphs will destroy the moved one's block styles. Always move the end of inserted forward
// to preserve the block style of the paragraph already in the document, unless the paragraph to move would
// include the what was the start of the selection that was pasted into, so that we preserve that paragraph's
// block styles.
bool mergeForward = !(inSameParagraph(startOfInsertedContent, endOfInsertedContent) && !isStartOfParagraph(startOfInsertedContent));
VisiblePosition destination = mergeForward ? endOfInsertedContent.next() : endOfInsertedContent;
VisiblePosition startOfParagraphToMove = mergeForward ? startOfParagraph(endOfInsertedContent) : endOfInsertedContent.next();
// Merging forward could result in deleting the destination anchor node.
// To avoid this, we add a placeholder node before the start of the paragraph.
if (endOfParagraph(startOfParagraphToMove) == destination) {
RefPtr<Node> placeholder = createBreakElement(document());
insertNodeBefore(placeholder, startOfParagraphToMove.deepEquivalent().node());
destination = VisiblePosition(Position(placeholder.get(), 0));
}
moveParagraph(startOfParagraphToMove, endOfParagraph(startOfParagraphToMove), destination);
// Merging forward will remove m_lastLeafInserted from the document.
// FIXME: Maintain positions for the start and end of inserted content instead of keeping nodes. The nodes are
// only ever used to create positions where inserted content starts/ends. Also, we sometimes insert content
// directly into text nodes already in the document, in which case tracking inserted nodes is inadequate.
if (mergeForward) {
m_lastLeafInserted = destination.previous().deepEquivalent().node();
if (!m_firstNodeInserted->inDocument())
m_firstNodeInserted = endingSelection().visibleStart().deepEquivalent().node();
// If we merged text nodes, m_lastLeafInserted could be null. If this is the case,
// we use m_firstNodeInserted.
if (!m_lastLeafInserted)
m_lastLeafInserted = m_firstNodeInserted;
}
}
void ReplaceSelectionCommand::doApply()
{
VisibleSelection selection = endingSelection();
ASSERT(selection.isCaretOrRange());
ASSERT(selection.start().node());
if (selection.isNone() || !selection.start().node())
return;
bool selectionIsPlainText = !selection.isContentRichlyEditable();
Element* currentRoot = selection.rootEditableElement();
ReplacementFragment fragment(document(), m_documentFragment.get(), m_matchStyle, selection);
if (performTrivialReplace(fragment))
return;
if (m_matchStyle)
m_insertionStyle = editingStyleAtPosition(selection.start(), IncludeTypingStyle);
VisiblePosition visibleStart = selection.visibleStart();
VisiblePosition visibleEnd = selection.visibleEnd();
bool selectionEndWasEndOfParagraph = isEndOfParagraph(visibleEnd);
bool selectionStartWasStartOfParagraph = isStartOfParagraph(visibleStart);
Node* startBlock = enclosingBlock(visibleStart.deepEquivalent().node());
Position insertionPos = selection.start();
bool startIsInsideMailBlockquote = nearestMailBlockquote(insertionPos.node());
if ((selectionStartWasStartOfParagraph && selectionEndWasEndOfParagraph && !startIsInsideMailBlockquote) ||
startBlock == currentRoot || isListItem(startBlock) || selectionIsPlainText)
m_preventNesting = false;
if (selection.isRange()) {
// When the end of the selection being pasted into is at the end of a paragraph, and that selection
// spans multiple blocks, not merging may leave an empty line.
// When the start of the selection being pasted into is at the start of a block, not merging
// will leave hanging block(s).
// Merge blocks if the start of the selection was in a Mail blockquote, since we handle
// that case specially to prevent nesting.
bool mergeBlocksAfterDelete = startIsInsideMailBlockquote || isEndOfParagraph(visibleEnd) || isStartOfBlock(visibleStart);
// FIXME: We should only expand to include fully selected special elements if we are copying a
// selection and pasting it on top of itself.
deleteSelection(false, mergeBlocksAfterDelete, true, false);
visibleStart = endingSelection().visibleStart();
if (fragment.hasInterchangeNewlineAtStart()) {
if (isEndOfParagraph(visibleStart) && !isStartOfParagraph(visibleStart)) {
if (!isEndOfDocument(visibleStart))
setEndingSelection(visibleStart.next());
} else
insertParagraphSeparator();
}
insertionPos = endingSelection().start();
} else {
ASSERT(selection.isCaret());
if (fragment.hasInterchangeNewlineAtStart()) {
VisiblePosition next = visibleStart.next(true);
if (isEndOfParagraph(visibleStart) && !isStartOfParagraph(visibleStart) && next.isNotNull())
setEndingSelection(next);
else
insertParagraphSeparator();
}
// We split the current paragraph in two to avoid nesting the blocks from the fragment inside the current block.
// For example paste <div>foo</div><div>bar</div><div>baz</div> into <div>x^x</div>, where ^ is the caret.
// As long as the div styles are the same, visually you'd expect: <div>xbar</div><div>bar</div><div>bazx</div>,
// not <div>xbar<div>bar</div><div>bazx</div></div>.
// Don't do this if the selection started in a Mail blockquote.
if (m_preventNesting && !startIsInsideMailBlockquote && !isEndOfParagraph(visibleStart) && !isStartOfParagraph(visibleStart)) {
insertParagraphSeparator();
setEndingSelection(endingSelection().visibleStart().previous());
}
insertionPos = endingSelection().start();
}
// We don't want any of the pasted content to end up nested in a Mail blockquote, so first break
// out of any surrounding Mail blockquotes. Unless we're inserting in a table, in which case
// breaking the blockquote will prevent the content from actually being inserted in the table.
if (startIsInsideMailBlockquote && m_preventNesting && !(enclosingNodeOfType(insertionPos, &isTableStructureNode))) {
applyCommandToComposite(BreakBlockquoteCommand::create(document()));
// This will leave a br between the split.
Node* br = endingSelection().start().node();
ASSERT(br->hasTagName(brTag));
// Insert content between the two blockquotes, but remove the br (since it was just a placeholder).
insertionPos = positionInParentBeforeNode(br);
removeNode(br);
}
// Inserting content could cause whitespace to collapse, e.g. inserting <div>foo</div> into hello^ world.
prepareWhitespaceAtPositionForSplit(insertionPos);
// NOTE: This would be an incorrect usage of downstream() if downstream() were changed to mean the last position after
// p that maps to the same visible position as p (since in the case where a br is at the end of a block and collapsed
// away, there are positions after the br which map to the same visible position as [br, 0]).
Node* endBR = insertionPos.downstream().node()->hasTagName(brTag) ? insertionPos.downstream().node() : 0;
VisiblePosition originalVisPosBeforeEndBR;
if (endBR)
originalVisPosBeforeEndBR = VisiblePosition(endBR, 0, DOWNSTREAM).previous();
startBlock = enclosingBlock(insertionPos.node());
// Adjust insertionPos to prevent nesting.
// If the start was in a Mail blockquote, we will have already handled adjusting insertionPos above.
if (m_preventNesting && startBlock && !startIsInsideMailBlockquote) {
ASSERT(startBlock != currentRoot);
VisiblePosition visibleInsertionPos(insertionPos);
if (isEndOfBlock(visibleInsertionPos) && !(isStartOfBlock(visibleInsertionPos) && fragment.hasInterchangeNewlineAtEnd()))
insertionPos = positionInParentAfterNode(startBlock);
else if (isStartOfBlock(visibleInsertionPos))
insertionPos = positionInParentBeforeNode(startBlock);
}
// Paste into run of tabs splits the tab span.
insertionPos = positionOutsideTabSpan(insertionPos);
// Paste at start or end of link goes outside of link.
insertionPos = positionAvoidingSpecialElementBoundary(insertionPos);
// FIXME: Can this wait until after the operation has been performed? There doesn't seem to be
// any work performed after this that queries or uses the typing style.
if (Frame* frame = document()->frame())
frame->clearTypingStyle();
bool handledStyleSpans = handleStyleSpansBeforeInsertion(fragment, insertionPos);
// FIXME: When pasting rich content we're often prevented from heading down the fast path by style spans. Try
// again here if they've been removed.
// We're finished if there is nothing to add.
if (fragment.isEmpty() || !fragment.firstChild())
return;
// 1) Insert the content.
// 2) Remove redundant styles and style tags, this inner <b> for example: <b>foo <b>bar</b> baz</b>.
// 3) Merge the start of the added content with the content before the position being pasted into.
// 4) Do one of the following: a) expand the last br if the fragment ends with one and it collapsed,
// b) merge the last paragraph of the incoming fragment with the paragraph that contained the
// end of the selection that was pasted into, or c) handle an interchange newline at the end of the
// incoming fragment.
// 5) Add spaces for smart replace.
// 6) Select the replacement if requested, and match style if requested.
VisiblePosition startOfInsertedContent, endOfInsertedContent;
RefPtr<Node> refNode = fragment.firstChild();
RefPtr<Node> node = refNode->nextSibling();
fragment.removeNode(refNode);
Node* blockStart = enclosingBlock(insertionPos.node());
if (isListElement(refNode.get()) && blockStart->renderer()->isListItem())
refNode = insertAsListItems(refNode, blockStart, insertionPos);
else
insertNodeAtAndUpdateNodesInserted(refNode, insertionPos);
// Mutation events (bug 22634) may have already removed the inserted content
if (!refNode->inDocument())
return;
bool plainTextFragment = isPlainTextMarkup(refNode.get());
while (node) {
Node* next = node->nextSibling();
fragment.removeNode(node);
insertNodeAfterAndUpdateNodesInserted(node, refNode.get());
// Mutation events (bug 22634) may have already removed the inserted content
if (!node->inDocument())
return;
refNode = node;
if (node && plainTextFragment)
plainTextFragment = isPlainTextMarkup(node.get());
node = next;
}
removeUnrenderedTextNodesAtEnds();
negateStyleRulesThatAffectAppearance();
if (!handledStyleSpans)
handleStyleSpans();
// Mutation events (bug 20161) may have already removed the inserted content
if (!m_firstNodeInserted || !m_firstNodeInserted->inDocument())
return;
endOfInsertedContent = positionAtEndOfInsertedContent();
startOfInsertedContent = positionAtStartOfInsertedContent();
// We inserted before the startBlock to prevent nesting, and the content before the startBlock wasn't in its own block and
// didn't have a br after it, so the inserted content ended up in the same paragraph.
if (startBlock && insertionPos.node() == startBlock->parentNode() && (unsigned)insertionPos.deprecatedEditingOffset() < startBlock->nodeIndex() && !isStartOfParagraph(startOfInsertedContent))
insertNodeAt(createBreakElement(document()).get(), startOfInsertedContent.deepEquivalent());
Position lastPositionToSelect;
bool interchangeNewlineAtEnd = fragment.hasInterchangeNewlineAtEnd();
if (endBR && (plainTextFragment || shouldRemoveEndBR(endBR, originalVisPosBeforeEndBR)))
removeNodeAndPruneAncestors(endBR);
// Determine whether or not we should merge the end of inserted content with what's after it before we do
// the start merge so that the start merge doesn't effect our decision.
m_shouldMergeEnd = shouldMergeEnd(selectionEndWasEndOfParagraph);
if (shouldMergeStart(selectionStartWasStartOfParagraph, fragment.hasInterchangeNewlineAtStart(), startIsInsideMailBlockquote)) {
VisiblePosition destination = startOfInsertedContent.previous();
VisiblePosition startOfParagraphToMove = startOfInsertedContent;
// Merging the the first paragraph of inserted content with the content that came
// before the selection that was pasted into would also move content after
// the selection that was pasted into if: only one paragraph was being pasted,
// and it was not wrapped in a block, the selection that was pasted into ended
// at the end of a block and the next paragraph didn't start at the start of a block.
// Insert a line break just after the inserted content to separate it from what
// comes after and prevent that from happening.
VisiblePosition endOfInsertedContent = positionAtEndOfInsertedContent();
if (startOfParagraph(endOfInsertedContent) == startOfParagraphToMove) {
insertNodeAt(createBreakElement(document()).get(), endOfInsertedContent.deepEquivalent());
// Mutation events (bug 22634) triggered by inserting the <br> might have removed the content we're about to move
if (!startOfParagraphToMove.deepEquivalent().node()->inDocument())
return;
}
// FIXME: Maintain positions for the start and end of inserted content instead of keeping nodes. The nodes are
// only ever used to create positions where inserted content starts/ends.
moveParagraph(startOfParagraphToMove, endOfParagraph(startOfParagraphToMove), destination);
m_firstNodeInserted = endingSelection().visibleStart().deepEquivalent().downstream().node();
if (!m_lastLeafInserted->inDocument())
m_lastLeafInserted = endingSelection().visibleEnd().deepEquivalent().upstream().node();
}
endOfInsertedContent = positionAtEndOfInsertedContent();
startOfInsertedContent = positionAtStartOfInsertedContent();
if (interchangeNewlineAtEnd) {
VisiblePosition next = endOfInsertedContent.next(true);
if (selectionEndWasEndOfParagraph || !isEndOfParagraph(endOfInsertedContent) || next.isNull()) {
if (!isStartOfParagraph(endOfInsertedContent)) {
setEndingSelection(endOfInsertedContent);
Node* enclosingNode = enclosingBlock(endOfInsertedContent.deepEquivalent().node());
if (isListItem(enclosingNode)) {
RefPtr<Node> newListItem = createListItemElement(document());
insertNodeAfter(newListItem, enclosingNode);
setEndingSelection(VisiblePosition(Position(newListItem, 0)));
} else
// Use a default paragraph element (a plain div) for the empty paragraph, using the last paragraph
// block's style seems to annoy users.
insertParagraphSeparator(true);
// Select up to the paragraph separator that was added.
lastPositionToSelect = endingSelection().visibleStart().deepEquivalent();
updateNodesInserted(lastPositionToSelect.node());
}
} else {
// Select up to the beginning of the next paragraph.
lastPositionToSelect = next.deepEquivalent().downstream();
}
} else
mergeEndIfNeeded();
handlePasteAsQuotationNode();
endOfInsertedContent = positionAtEndOfInsertedContent();
startOfInsertedContent = positionAtStartOfInsertedContent();
// Add spaces for smart replace.
if (m_smartReplace && currentRoot) {
// Disable smart replace for password fields.
Node* start = currentRoot->shadowAncestorNode();
if (start->hasTagName(inputTag) && static_cast<HTMLInputElement*>(start)->inputType() == HTMLInputElement::PASSWORD)
m_smartReplace = false;
}
if (m_smartReplace) {
bool needsTrailingSpace = !isEndOfParagraph(endOfInsertedContent) &&
!isCharacterSmartReplaceExempt(endOfInsertedContent.characterAfter(), false);
if (needsTrailingSpace) {
RenderObject* renderer = m_lastLeafInserted->renderer();
bool collapseWhiteSpace = !renderer || renderer->style()->collapseWhiteSpace();
Node* endNode = positionAtEndOfInsertedContent().deepEquivalent().upstream().node();
if (endNode->isTextNode()) {
Text* text = static_cast<Text*>(endNode);
insertTextIntoNode(text, text->length(), collapseWhiteSpace ? nonBreakingSpaceString() : " ");
} else {
RefPtr<Node> node = document()->createEditingTextNode(collapseWhiteSpace ? nonBreakingSpaceString() : " ");
insertNodeAfterAndUpdateNodesInserted(node, endNode);
}
}
bool needsLeadingSpace = !isStartOfParagraph(startOfInsertedContent) &&
!isCharacterSmartReplaceExempt(startOfInsertedContent.previous().characterAfter(), true);
if (needsLeadingSpace) {
RenderObject* renderer = m_lastLeafInserted->renderer();
bool collapseWhiteSpace = !renderer || renderer->style()->collapseWhiteSpace();
Node* startNode = positionAtStartOfInsertedContent().deepEquivalent().downstream().node();
if (startNode->isTextNode()) {
Text* text = static_cast<Text*>(startNode);
insertTextIntoNode(text, 0, collapseWhiteSpace ? nonBreakingSpaceString() : " ");
} else {
RefPtr<Node> node = document()->createEditingTextNode(collapseWhiteSpace ? nonBreakingSpaceString() : " ");
// Don't updateNodesInserted. Doing so would set m_lastLeafInserted to be the node containing the
// leading space, but m_lastLeafInserted is supposed to mark the end of pasted content.
insertNodeBefore(node, startNode);
// FIXME: Use positions to track the start/end of inserted content.
m_firstNodeInserted = node;
}
}
}
// If we are dealing with a fragment created from plain text
// no style matching is necessary.
if (plainTextFragment)
m_matchStyle = false;
completeHTMLReplacement(lastPositionToSelect);
}
bool ReplaceSelectionCommand::shouldRemoveEndBR(Node* endBR, const VisiblePosition& originalVisPosBeforeEndBR)
{
if (!endBR || !endBR->inDocument())
return false;
VisiblePosition visiblePos(Position(endBR, 0));
// Don't remove the br if nothing was inserted.
if (visiblePos.previous() == originalVisPosBeforeEndBR)
return false;
// Remove the br if it is collapsed away and so is unnecessary.
if (!document()->inStrictMode() && isEndOfBlock(visiblePos) && !isStartOfParagraph(visiblePos))
return true;
// A br that was originally holding a line open should be displaced by inserted content or turned into a line break.
// A br that was originally acting as a line break should still be acting as a line break, not as a placeholder.
return isStartOfParagraph(visiblePos) && isEndOfParagraph(visiblePos);
}
void ReplaceSelectionCommand::completeHTMLReplacement(const Position &lastPositionToSelect)
{
Position start;
Position end;
// FIXME: This should never not be the case.
if (m_firstNodeInserted && m_firstNodeInserted->inDocument() && m_lastLeafInserted && m_lastLeafInserted->inDocument()) {
start = positionAtStartOfInsertedContent().deepEquivalent();
end = positionAtEndOfInsertedContent().deepEquivalent();
// FIXME (11475): Remove this and require that the creator of the fragment to use nbsps.
rebalanceWhitespaceAt(start);
rebalanceWhitespaceAt(end);
if (m_matchStyle) {
ASSERT(m_insertionStyle);
applyStyle(m_insertionStyle.get(), start, end);
}
if (lastPositionToSelect.isNotNull())
end = lastPositionToSelect;
} else if (lastPositionToSelect.isNotNull())
start = end = lastPositionToSelect;
else
return;
if (m_selectReplacement)
setEndingSelection(VisibleSelection(start, end, SEL_DEFAULT_AFFINITY));
else
setEndingSelection(VisibleSelection(end, SEL_DEFAULT_AFFINITY));
}
EditAction ReplaceSelectionCommand::editingAction() const
{
return m_editAction;
}
void ReplaceSelectionCommand::insertNodeAfterAndUpdateNodesInserted(PassRefPtr<Node> insertChild, Node* refChild)
{
Node* nodeToUpdate = insertChild.get(); // insertChild will be cleared when passed
insertNodeAfter(insertChild, refChild);
updateNodesInserted(nodeToUpdate);
}
void ReplaceSelectionCommand::insertNodeAtAndUpdateNodesInserted(PassRefPtr<Node> insertChild, const Position& p)
{
Node* nodeToUpdate = insertChild.get(); // insertChild will be cleared when passed
insertNodeAt(insertChild, p);
updateNodesInserted(nodeToUpdate);
}
void ReplaceSelectionCommand::insertNodeBeforeAndUpdateNodesInserted(PassRefPtr<Node> insertChild, Node* refChild)
{
Node* nodeToUpdate = insertChild.get(); // insertChild will be cleared when passed
insertNodeBefore(insertChild, refChild);
updateNodesInserted(nodeToUpdate);
}
// If the user is inserting a list into an existing list, instead of nesting the list,
// we put the list items into the existing list.
Node* ReplaceSelectionCommand::insertAsListItems(PassRefPtr<Node> listElement, Node* insertionNode, const Position& p)
{
while (listElement->hasChildNodes() && isListElement(listElement->firstChild()) && listElement->childNodeCount() == 1)
listElement = listElement->firstChild();
bool isStart = isStartOfParagraph(p);
bool isEnd = isEndOfParagraph(p);
Node* lastNode = insertionNode;
while (RefPtr<Node> listItem = listElement->firstChild()) {
ExceptionCode ec = 0;
listElement->removeChild(listItem.get(), ec);
ASSERT(!ec);
if (isStart)
insertNodeBefore(listItem, lastNode);
else if (isEnd) {
insertNodeAfter(listItem, lastNode);
lastNode = listItem.get();
} else {
// FIXME: If we're in the middle of a list item, we should split it into two separate
// list items and insert these nodes between them. For now, just append the nodes.
insertNodeAfter(listItem, lastNode);
lastNode = listItem.get();
}
}
if (isStart)
lastNode = lastNode->previousSibling();
updateNodesInserted(lastNode);
return lastNode;
}
void ReplaceSelectionCommand::updateNodesInserted(Node *node)
{
if (!node)
return;
if (!m_firstNodeInserted)
m_firstNodeInserted = node;
if (node == m_lastLeafInserted)
return;
m_lastLeafInserted = node->lastDescendant();
}
// During simple pastes, where we're just pasting a text node into a run of text, we insert the text node
// directly into the text node that holds the selection. This is much faster than the generalized code in
// ReplaceSelectionCommand, and works around <https://bugs.webkit.org/show_bug.cgi?id=6148> since we don't
// split text nodes.
bool ReplaceSelectionCommand::performTrivialReplace(const ReplacementFragment& fragment)
{
if (!fragment.firstChild() || fragment.firstChild() != fragment.lastChild() || !fragment.firstChild()->isTextNode())
return false;
// FIXME: Would be nice to handle smart replace in the fast path.
if (m_smartReplace || fragment.hasInterchangeNewlineAtStart() || fragment.hasInterchangeNewlineAtEnd())
return false;
Text* textNode = static_cast<Text*>(fragment.firstChild());
// Our fragment creation code handles tabs, spaces, and newlines, so we don't have to worry about those here.
String text(textNode->data());
Position start = endingSelection().start();
Position end = endingSelection().end();
if (start.anchorNode() != end.anchorNode() || !start.anchorNode()->isTextNode())
return false;
replaceTextInNode(static_cast<Text*>(start.anchorNode()), start.offsetInContainerNode(), end.offsetInContainerNode() - start.offsetInContainerNode(), text);
end = Position(start.anchorNode(), start.offsetInContainerNode() + text.length());
VisibleSelection selectionAfterReplace(m_selectReplacement ? start : end, end);
setEndingSelection(selectionAfterReplace);
return true;
}
} // namespace WebCore