diff options
Diffstat (limited to 'src/3rdparty/webkit/WebCore/editing/ReplaceSelectionCommand.cpp')
| -rw-r--r-- | src/3rdparty/webkit/WebCore/editing/ReplaceSelectionCommand.cpp | 1058 |
1 files changed, 1058 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/editing/ReplaceSelectionCommand.cpp b/src/3rdparty/webkit/WebCore/editing/ReplaceSelectionCommand.cpp new file mode 100644 index 0000000..0a19c5e --- /dev/null +++ b/src/3rdparty/webkit/WebCore/editing/ReplaceSelectionCommand.cpp @@ -0,0 +1,1058 @@ +/* + * 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 "CSSProperty.h" +#include "CSSPropertyNames.h" +#include "CSSValueKeywords.h" +#include "Document.h" +#include "DocumentFragment.h" +#include "EditingText.h" +#include "EventNames.h" +#include "Element.h" +#include "Frame.h" +#include "HTMLElement.h" +#include "HTMLInterchange.h" +#include "HTMLInputElement.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 : Noncopyable { +public: + ReplacementFragment(Document*, DocumentFragment*, bool matchStyle, const Selection&); + + 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(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 Selection& 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->inlineEventListenerForType(eventNames().webkitBeforeTextInsertedEvent) && + // FIXME: Remove these checks once textareas and textfields actually register an event handler. + !(shadowAncestorNode && shadowAncestorNode->renderer() && shadowAncestorNode->renderer()->isTextField()) && + !(shadowAncestorNode && shadowAncestorNode->renderer() && shadowAncestorNode->renderer()->isTextArea()) && + editableRoot->isContentRichlyEditable()) { + removeInterchangeNodes(m_fragment.get()); + return; + } + + Node* styleNode = selection.base().node(); + RefPtr<Node> holder = insertFragmentForTestRendering(styleNode); + + RefPtr<Range> range = Selection::selectionFromContentsOfNode(holder.get()).toRange(); + 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.toRange().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.get(), 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(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.get(), 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) +{ + VisiblePosition startOfInsertedContent(positionAtStartOfInsertedContent()); + VisiblePosition prev = startOfInsertedContent.previous(true); + if (prev.isNull()) + return false; + + if (!m_movingParagraph && 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; +} + +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); + return !enclosingNodeOfType(source.deepEquivalent(), &isMailPasteAsQuotationNode) && + sourceBlock && (!sourceBlock->hasTagName(blockquoteTag) || isMailBlockquote(sourceBlock)) && + enclosingListChild(sourceBlock) == enclosingListChild(destinationNode) && + enclosingTableCell(source.deepEquivalent()) == enclosingTableCell(destination.deepEquivalent()) && + // 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(); + Node* enclosingSelect = enclosingNodeWithTag(Position(lastNode, 0), selectTag); + if (enclosingSelect) + lastNode = enclosingSelect; + return VisiblePosition(Position(lastNode, maxDeepOffset(lastNode))); +} + +VisiblePosition ReplaceSelectionCommand::positionAtStartOfInsertedContent() +{ + // Return the inserted content's first VisiblePosition. + return VisiblePosition(nextCandidate(positionBeforeNode(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 this case is more complicated (see handleStyleSpans) and doesn't receive the optimization. + if (isMailPasteAsQuotationNode(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 = rangeCompliantEquivalent(insertionPos).computedStyle()->copyInheritableProperties(); + 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, styles from that element are + // allowed to override those from the source document, see <rdar://problem/4930986>. + if (isMailPasteAsQuotationNode(context)) { + RefPtr<CSSMutableStyleDeclaration> blockquoteStyle = computedStyle(context)->copyInheritableProperties(); + RefPtr<CSSMutableStyleDeclaration> parentStyle = computedStyle(context->parentNode())->copyInheritableProperties(); + 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 = context->parentNode(); + } + + RefPtr<CSSMutableStyleDeclaration> contextStyle = computedStyle(context)->copyInheritableProperties(); + contextStyle->diff(sourceDocumentStyle.get()); + + // 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(); + contextStyle = computedStyle(context)->copyInheritableProperties(); + contextStyle->diff(copiedRangeStyle.get()); + + // 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(); + + 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. + if (mergeForward) { + m_lastLeafInserted = destination.previous().deepEquivalent().node(); + if (!m_firstNodeInserted->inDocument()) + m_firstNodeInserted = endingSelection().visibleStart().deepEquivalent().node(); + } +} + +void ReplaceSelectionCommand::doApply() +{ + Selection 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 (m_matchStyle) + m_insertionStyle = styleAtPosition(selection.start()); + + 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 || + startBlock && startBlock->renderer() && startBlock->renderer()->isListItem() || + 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(); + } + + if (startIsInsideMailBlockquote && m_preventNesting) { + // 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. + 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 = positionBeforeNode(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 = positionAfterNode(startBlock); + else if (isStartOfBlock(visibleInsertionPos)) + insertionPos = positionBeforeNode(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'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); + insertNodeAtAndUpdateNodesInserted(refNode.get(), insertionPos); + + while (node) { + Node* next = node->nextSibling(); + fragment.removeNode(node); + insertNodeAfterAndUpdateNodesInserted(node.get(), refNode.get()); + refNode = node; + 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.offset() < startBlock->nodeIndex() && !isStartOfParagraph(startOfInsertedContent)) + insertNodeAt(createBreakElement(document()).get(), startOfInsertedContent.deepEquivalent()); + + Position lastPositionToSelect; + + bool interchangeNewlineAtEnd = fragment.hasInterchangeNewlineAtEnd(); + + if (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())) { + // Bail to avoid infinite recursion. + if (m_movingParagraph) { + // setting display:inline does not work for td elements in quirks mode + ASSERT(m_firstNodeInserted->hasTagName(tdTag)); + return; + } + 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()); + + // 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); + // 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.get(), 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.get(), startNode); + // FIXME: Use positions to track the start/end of inserted content. + m_firstNodeInserted = node; + } + } + } + + 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(Selection(start, end, SEL_DEFAULT_AFFINITY)); + else + setEndingSelection(Selection(end, SEL_DEFAULT_AFFINITY)); +} + +EditAction ReplaceSelectionCommand::editingAction() const +{ + return m_editAction; +} + +void ReplaceSelectionCommand::insertNodeAfterAndUpdateNodesInserted(Node *insertChild, Node *refChild) +{ + insertNodeAfter(insertChild, refChild); + updateNodesInserted(insertChild); +} + +void ReplaceSelectionCommand::insertNodeAtAndUpdateNodesInserted(Node *insertChild, const Position& p) +{ + insertNodeAt(insertChild, p); + updateNodesInserted(insertChild); +} + +void ReplaceSelectionCommand::insertNodeBeforeAndUpdateNodesInserted(Node *insertChild, Node *refChild) +{ + insertNodeBefore(insertChild, refChild); + updateNodesInserted(insertChild); +} + +void ReplaceSelectionCommand::updateNodesInserted(Node *node) +{ + if (!node) + return; + + if (!m_firstNodeInserted) + m_firstNodeInserted = node; + + if (node == m_lastLeafInserted) + return; + + m_lastLeafInserted = node->lastDescendant(); +} + +} // namespace WebCore |