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* Copyright (C) 2005 Apple Computer, Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "BreakBlockquoteCommand.h"
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#include "HTMLElement.h"
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#include "HTMLNames.h"
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#include "RenderListItem.h"
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#include "VisiblePosition.h"
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#include "htmlediting.h"
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using namespace HTMLNames;
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BreakBlockquoteCommand::BreakBlockquoteCommand(Document *document)
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: CompositeEditCommand(document)
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void BreakBlockquoteCommand::doApply()
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if (endingSelection().isNone())
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// Delete the current selection.
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if (endingSelection().isRange())
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deleteSelection(false, false);
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// This is a scenario that should never happen, but we want to
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// make sure we don't dereference a null pointer below.
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ASSERT(!endingSelection().isNone());
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if (endingSelection().isNone())
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VisiblePosition visiblePos = endingSelection().visibleStart();
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// pos is a position equivalent to the caret. We use downstream() so that pos will
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// be in the first node that we need to move (there are a few exceptions to this, see below).
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Position pos = endingSelection().start().downstream();
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// Find the top-most blockquote from the start.
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Node* topBlockquote = highestEnclosingNodeOfType(pos, isMailBlockquote);
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if (!topBlockquote || !topBlockquote->parentNode() || !topBlockquote->isElementNode())
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RefPtr<Element> breakNode = createBreakElement(document());
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bool isLastVisPosInNode = isLastVisiblePositionInNode(visiblePos, topBlockquote);
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// If the position is at the beginning of the top quoted content, we don't need to break the quote.
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// Instead, insert the break before the blockquote, unless the position is as the end of the the quoted content.
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if (isFirstVisiblePositionInNode(visiblePos, topBlockquote) && !isLastVisPosInNode) {
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insertNodeBefore(breakNode.get(), topBlockquote);
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setEndingSelection(VisibleSelection(positionBeforeNode(breakNode.get()), DOWNSTREAM, endingSelection().isDirectional()));
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rebalanceWhitespace();
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// Insert a break after the top blockquote.
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insertNodeAfter(breakNode.get(), topBlockquote);
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// If we're inserting the break at the end of the quoted content, we don't need to break the quote.
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if (isLastVisPosInNode) {
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setEndingSelection(VisibleSelection(positionBeforeNode(breakNode.get()), DOWNSTREAM, endingSelection().isDirectional()));
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rebalanceWhitespace();
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// Don't move a line break just after the caret. Doing so would create an extra, empty paragraph
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// in the new blockquote.
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if (lineBreakExistsAtVisiblePosition(visiblePos))
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// Adjust the position so we don't split at the beginning of a quote.
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while (isFirstVisiblePositionInNode(VisiblePosition(pos), enclosingNodeOfType(pos, isMailBlockquote)))
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pos = pos.previous();
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// startNode is the first node that we need to move to the new blockquote.
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Node* startNode = pos.deprecatedNode();
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// Split at pos if in the middle of a text node.
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if (startNode->isTextNode()) {
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Text* textNode = toText(startNode);
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if ((unsigned)pos.deprecatedEditingOffset() >= textNode->length()) {
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startNode = startNode->traverseNextNode();
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} else if (pos.deprecatedEditingOffset() > 0)
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splitTextNode(textNode, pos.deprecatedEditingOffset());
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} else if (pos.deprecatedEditingOffset() > 0) {
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Node* childAtOffset = startNode->childNode(pos.deprecatedEditingOffset());
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startNode = childAtOffset ? childAtOffset : startNode->traverseNextNode();
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// If there's nothing inside topBlockquote to move, we're finished.
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if (!startNode->isDescendantOf(topBlockquote)) {
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setEndingSelection(VisibleSelection(VisiblePosition(firstPositionInOrBeforeNode(startNode)), endingSelection().isDirectional()));
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// Build up list of ancestors in between the start node and the top blockquote.
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Vector<RefPtr<Element> > ancestors;
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for (Element* node = startNode->parentElement(); node && node != topBlockquote; node = node->parentElement())
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ancestors.append(node);
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// Insert a clone of the top blockquote after the break.
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RefPtr<Element> clonedBlockquote = static_cast<Element*>(topBlockquote)->cloneElementWithoutChildren();
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insertNodeAfter(clonedBlockquote.get(), breakNode.get());
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// Clone startNode's ancestors into the cloned blockquote.
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// On exiting this loop, clonedAncestor is the lowest ancestor
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// that was cloned (i.e. the clone of either ancestors.last()
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// or clonedBlockquote if ancestors is empty).
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RefPtr<Element> clonedAncestor = clonedBlockquote;
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for (size_t i = ancestors.size(); i != 0; --i) {
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RefPtr<Element> clonedChild = ancestors[i - 1]->cloneElementWithoutChildren();
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// Preserve list item numbering in cloned lists.
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if (clonedChild->isElementNode() && clonedChild->hasTagName(olTag)) {
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Node* listChildNode = i > 1 ? ancestors[i - 2].get() : startNode;
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// The first child of the cloned list might not be a list item element,
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// find the first one so that we know where to start numbering.
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while (listChildNode && !listChildNode->hasTagName(liTag))
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listChildNode = listChildNode->nextSibling();
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if (listChildNode && listChildNode->renderer() && listChildNode->renderer()->isListItem())
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setNodeAttribute(static_cast<Element*>(clonedChild.get()), startAttr, String::number(toRenderListItem(listChildNode->renderer())->value()));
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appendNode(clonedChild.get(), clonedAncestor.get());
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clonedAncestor = clonedChild;
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moveRemainingSiblingsToNewParent(startNode, 0, clonedAncestor);
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if (!ancestors.isEmpty()) {
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// Split the tree up the ancestor chain until the topBlockquote
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// Throughout this loop, clonedParent is the clone of ancestor's parent.
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// This is so we can clone ancestor's siblings and place the clones
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// into the clone corresponding to the ancestor's parent.
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RefPtr<Element> ancestor;
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RefPtr<Element> clonedParent;
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for (ancestor = ancestors.first(), clonedParent = clonedAncestor->parentElement();
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ancestor && ancestor != topBlockquote;
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ancestor = ancestor->parentElement(), clonedParent = clonedParent->parentElement())
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moveRemainingSiblingsToNewParent(ancestor->nextSibling(), 0, clonedParent);
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// If the startNode's original parent is now empty, remove it
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Node* originalParent = ancestors.first().get();
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if (!originalParent->hasChildNodes())
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removeNode(originalParent);
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// Make sure the cloned block quote renders.
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addBlockPlaceholderIfNeeded(clonedBlockquote.get());
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// Put the selection right before the break.
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setEndingSelection(VisibleSelection(positionBeforeNode(breakNode.get()), DOWNSTREAM, endingSelection().isDirectional()));
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rebalanceWhitespace();
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} // namespace WebCore