--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/editing/ReplaceSelectionCommand.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,1274 @@
+/*
+ * 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;
+}
+
+static Position positionAvoidingPrecedingNodes(Position pos)
+{
+ // If we're already on a break, it's probably a placeholder and we shouldn't change our position.
+ if (pos.node()->hasTagName(brTag))
+ return pos;
+
+ // We also stop when changing block flow elements because even though the visual position is the
+ // same. E.g.,
+ // <div>foo^</div>^
+ // The two positions above are the same visual position, but we want to stay in the same block.
+ Node* stopNode = pos.node()->enclosingBlockFlowElement();
+ while (stopNode != pos.node() && VisiblePosition(pos) == VisiblePosition(pos.next()))
+ pos = pos.next();
+ return pos;
+}
+
+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);
+
+ // Undo the effects of page zoom if we have an absolute font size. When we copy, we
+ // compute the new font size as an absolute size so pasting will cause the zoom to be
+ // applied twice.
+ if (e->renderer() && e->renderer()->style() && e->renderer()->style()->effectiveZoom() != 1.0
+ && e->renderer()->style()->fontDescription().isAbsoluteSize()) {
+ float newSize = e->renderer()->style()->fontDescription().specifiedSize() / e->renderer()->style()->effectiveZoom();
+ ExceptionCode ec = 0;
+ e->style()->setProperty(CSSPropertyFontSize, String::number(newSize), false, ec);
+ ASSERT(!ec);
+ }
+ }
+ 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 = ApplyStyleCommand::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 = ApplyStyleCommand::editingStyleAtPosition(Position(blockquoteNode, 0));
+ RefPtr<CSSMutableStyleDeclaration> parentStyle = ApplyStyleCommand::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. Remove the span, because it could be surrounding block elements,
+ // and apply the styles to its children.
+ if (sourceDocumentStyle->length() > 0 && !copiedRangeStyleSpan) {
+ copyStyleToChildren(sourceDocumentStyleSpan, sourceDocumentStyle.get());
+ removeNodePreservingChildren(sourceDocumentStyleSpan);
+ 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());
+}
+
+// Take the style attribute of a span and apply it to it's children instead. This allows us to
+// convert invalid HTML where a span contains block elements into valid HTML while preserving
+// styles.
+void ReplaceSelectionCommand::copyStyleToChildren(Node* parentNode, const CSSMutableStyleDeclaration* parentStyle)
+{
+ ASSERT(parentNode->hasTagName(spanTag));
+ for (Node* childNode = parentNode->firstChild(); childNode; childNode = childNode->nextSibling()) {
+ if (childNode->isTextNode() || !isBlock(childNode) || childNode->hasTagName(preTag)) {
+ // In this case, put a span tag around the child node.
+ RefPtr<Node> newSpan = parentNode->cloneNode(false);
+ setNodeAttribute(static_cast<Element*>(newSpan.get()), styleAttr, parentStyle->cssText());
+ insertNodeAfter(newSpan, childNode);
+ ExceptionCode ec = 0;
+ newSpan->appendChild(childNode, ec);
+ ASSERT(!ec);
+ childNode = newSpan.get();
+ } else if (childNode->isHTMLElement()) {
+ // Copy the style attribute and merge them into the child node. We don't want to override
+ // existing styles, so don't clobber on merge.
+ RefPtr<CSSMutableStyleDeclaration> newStyle = parentStyle->copy();
+ HTMLElement* childElement = static_cast<HTMLElement*>(childNode);
+ RefPtr<CSSMutableStyleDeclaration> existingStyles = childElement->getInlineStyleDecl()->copy();
+ existingStyles->merge(newStyle.get(), false);
+ setNodeAttribute(childElement, styleAttr, existingStyles->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 = ApplyStyleCommand::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);
+
+ // We don't want the destination to end up inside nodes that weren't selected. To avoid that, we move the
+ // position forward without changing the visible position so we're still at the same visible location, but
+ // outside of preceding tags.
+ insertionPos = positionAvoidingPrecedingNodes(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()) || (isStyleSpan(refNode.get()) && isListElement(refNode->firstChild())))
+ && 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* insertionBlock, const Position& insertPos)
+{
+ while (listElement->hasChildNodes() && isListElement(listElement->firstChild()) && listElement->childNodeCount() == 1)
+ listElement = listElement->firstChild();
+
+ bool isStart = isStartOfParagraph(insertPos);
+ bool isEnd = isEndOfParagraph(insertPos);
+ bool isMiddle = !isStart && !isEnd;
+ Node* lastNode = insertionBlock;
+
+ // 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.
+ if (isMiddle) {
+ int textNodeOffset = insertPos.offsetInContainerNode();
+ if (insertPos.node()->isTextNode() && textNodeOffset > 0)
+ splitTextNode(static_cast<Text*>(insertPos.node()), textNodeOffset);
+ splitTreeToNode(insertPos.node(), lastNode, true);
+ }
+
+ while (RefPtr<Node> listItem = listElement->firstChild()) {
+ ExceptionCode ec = 0;
+ listElement->removeChild(listItem.get(), ec);
+ ASSERT(!ec);
+ if (isStart || isMiddle)
+ insertNodeBefore(listItem, lastNode);
+ else if (isEnd) {
+ insertNodeAfter(listItem, lastNode);
+ lastNode = listItem.get();
+ } else
+ ASSERT_NOT_REACHED();
+ }
+ if (isStart || isMiddle)
+ lastNode = lastNode->previousSibling();
+ if (isMiddle)
+ insertNodeAfter(createListItemElement(document()), lastNode);
+ 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