| /* |
| * Copyright (C) 2005 Apple Computer, 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 "BreakBlockquoteCommand.h" |
| |
| #include "HTMLElement.h" |
| #include "HTMLNames.h" |
| #include "NodeTraversal.h" |
| #include "RenderListItem.h" |
| #include "Text.h" |
| #include "htmlediting.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| BreakBlockquoteCommand::BreakBlockquoteCommand(Document& document) |
| : CompositeEditCommand(document) |
| { |
| } |
| |
| void BreakBlockquoteCommand::doApply() |
| { |
| if (endingSelection().isNone()) |
| return; |
| |
| // Delete the current selection. |
| if (endingSelection().isRange()) |
| deleteSelection(false, false); |
| |
| // This is a scenario that should never happen, but we want to |
| // make sure we don't dereference a null pointer below. |
| |
| ASSERT(!endingSelection().isNone()); |
| |
| if (endingSelection().isNone()) |
| return; |
| |
| VisiblePosition visiblePos = endingSelection().visibleStart(); |
| |
| // pos is a position equivalent to the caret. We use downstream() so that pos will |
| // be in the first node that we need to move (there are a few exceptions to this, see below). |
| Position pos = endingSelection().start().downstream(); |
| |
| // Find the top-most blockquote from the start. |
| Node* topBlockquote = highestEnclosingNodeOfType(pos, isMailBlockquote); |
| if (!topBlockquote || !topBlockquote->parentNode() || !topBlockquote->isElementNode()) |
| return; |
| |
| RefPtr<Element> breakNode = createBreakElement(document()); |
| |
| bool isLastVisPosInNode = isLastVisiblePositionInNode(visiblePos, topBlockquote); |
| |
| // If the position is at the beginning of the top quoted content, we don't need to break the quote. |
| // Instead, insert the break before the blockquote, unless the position is as the end of the the quoted content. |
| if (isFirstVisiblePositionInNode(visiblePos, topBlockquote) && !isLastVisPosInNode) { |
| insertNodeBefore(breakNode.get(), topBlockquote); |
| setEndingSelection(VisibleSelection(positionBeforeNode(breakNode.get()), DOWNSTREAM, endingSelection().isDirectional())); |
| rebalanceWhitespace(); |
| return; |
| } |
| |
| // Insert a break after the top blockquote. |
| insertNodeAfter(breakNode.get(), topBlockquote); |
| |
| // If we're inserting the break at the end of the quoted content, we don't need to break the quote. |
| if (isLastVisPosInNode) { |
| setEndingSelection(VisibleSelection(positionBeforeNode(breakNode.get()), DOWNSTREAM, endingSelection().isDirectional())); |
| rebalanceWhitespace(); |
| return; |
| } |
| |
| // Don't move a line break just after the caret. Doing so would create an extra, empty paragraph |
| // in the new blockquote. |
| if (lineBreakExistsAtVisiblePosition(visiblePos)) |
| pos = pos.next(); |
| |
| // Adjust the position so we don't split at the beginning of a quote. |
| while (isFirstVisiblePositionInNode(VisiblePosition(pos), enclosingNodeOfType(pos, isMailBlockquote))) |
| pos = pos.previous(); |
| |
| // startNode is the first node that we need to move to the new blockquote. |
| Node* startNode = pos.deprecatedNode(); |
| |
| // Split at pos if in the middle of a text node. |
| if (startNode->isTextNode()) { |
| Text* textNode = toText(startNode); |
| if ((unsigned)pos.deprecatedEditingOffset() >= textNode->length()) { |
| startNode = NodeTraversal::next(startNode); |
| ASSERT(startNode); |
| } else if (pos.deprecatedEditingOffset() > 0) |
| splitTextNode(textNode, pos.deprecatedEditingOffset()); |
| } else if (pos.deprecatedEditingOffset() > 0) { |
| Node* childAtOffset = startNode->childNode(pos.deprecatedEditingOffset()); |
| startNode = childAtOffset ? childAtOffset : NodeTraversal::next(startNode); |
| ASSERT(startNode); |
| } |
| |
| // If there's nothing inside topBlockquote to move, we're finished. |
| if (!startNode->isDescendantOf(topBlockquote)) { |
| setEndingSelection(VisibleSelection(VisiblePosition(firstPositionInOrBeforeNode(startNode)), endingSelection().isDirectional())); |
| return; |
| } |
| |
| // Build up list of ancestors in between the start node and the top blockquote. |
| Vector<RefPtr<Element>> ancestors; |
| for (Element* node = startNode->parentElement(); node && node != topBlockquote; node = node->parentElement()) |
| ancestors.append(node); |
| |
| // Insert a clone of the top blockquote after the break. |
| RefPtr<Element> clonedBlockquote = toElement(topBlockquote)->cloneElementWithoutChildren(); |
| insertNodeAfter(clonedBlockquote.get(), breakNode.get()); |
| |
| // Clone startNode's ancestors into the cloned blockquote. |
| // On exiting this loop, clonedAncestor is the lowest ancestor |
| // that was cloned (i.e. the clone of either ancestors.last() |
| // or clonedBlockquote if ancestors is empty). |
| RefPtr<Element> clonedAncestor = clonedBlockquote; |
| for (size_t i = ancestors.size(); i != 0; --i) { |
| RefPtr<Element> clonedChild = ancestors[i - 1]->cloneElementWithoutChildren(); |
| // Preserve list item numbering in cloned lists. |
| if (clonedChild->isElementNode() && clonedChild->hasTagName(olTag)) { |
| Node* listChildNode = i > 1 ? ancestors[i - 2].get() : startNode; |
| // The first child of the cloned list might not be a list item element, |
| // find the first one so that we know where to start numbering. |
| while (listChildNode && !listChildNode->hasTagName(liTag)) |
| listChildNode = listChildNode->nextSibling(); |
| if (listChildNode && listChildNode->renderer() && listChildNode->renderer()->isListItem()) |
| setNodeAttribute(clonedChild, startAttr, AtomicString::number(toRenderListItem(listChildNode->renderer())->value())); |
| } |
| |
| appendNode(clonedChild.get(), clonedAncestor.get()); |
| clonedAncestor = clonedChild; |
| } |
| |
| moveRemainingSiblingsToNewParent(startNode, 0, clonedAncestor); |
| |
| if (!ancestors.isEmpty()) { |
| // Split the tree up the ancestor chain until the topBlockquote |
| // Throughout this loop, clonedParent is the clone of ancestor's parent. |
| // This is so we can clone ancestor's siblings and place the clones |
| // into the clone corresponding to the ancestor's parent. |
| RefPtr<Element> ancestor; |
| RefPtr<Element> clonedParent; |
| for (ancestor = ancestors.first(), clonedParent = clonedAncestor->parentElement(); |
| ancestor && ancestor != topBlockquote; |
| ancestor = ancestor->parentElement(), clonedParent = clonedParent->parentElement()) |
| moveRemainingSiblingsToNewParent(ancestor->nextSibling(), 0, clonedParent); |
| |
| // If the startNode's original parent is now empty, remove it |
| Node* originalParent = ancestors.first().get(); |
| if (!originalParent->hasChildNodes()) |
| removeNode(originalParent); |
| } |
| |
| // Make sure the cloned block quote renders. |
| addBlockPlaceholderIfNeeded(clonedBlockquote.get()); |
| |
| // Put the selection right before the break. |
| setEndingSelection(VisibleSelection(positionBeforeNode(breakNode.get()), DOWNSTREAM, endingSelection().isDirectional())); |
| rebalanceWhitespace(); |
| } |
| |
| } // namespace WebCore |