1/* 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "Element.h" 28#include "FormatBlockCommand.h" 29#include "Document.h" 30#include "ExceptionCodePlaceholder.h" 31#include "htmlediting.h" 32#include "HTMLElement.h" 33#include "HTMLNames.h" 34#include "Range.h" 35#include "VisibleUnits.h" 36 37namespace WebCore { 38 39using namespace HTMLNames; 40 41static Node* enclosingBlockToSplitTreeTo(Node* startNode); 42static bool isElementForFormatBlock(const QualifiedName& tagName); 43static inline bool isElementForFormatBlock(Node* node) 44{ 45 return node->isElementNode() && isElementForFormatBlock(toElement(node)->tagQName()); 46} 47 48FormatBlockCommand::FormatBlockCommand(Document* document, const QualifiedName& tagName) 49 : ApplyBlockElementCommand(document, tagName) 50 , m_didApply(false) 51{ 52} 53 54void FormatBlockCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection) 55{ 56 if (!isElementForFormatBlock(tagName())) 57 return; 58 ApplyBlockElementCommand::formatSelection(startOfSelection, endOfSelection); 59 m_didApply = true; 60} 61 62void FormatBlockCommand::formatRange(const Position& start, const Position& end, const Position& endOfSelection, RefPtr<Element>& blockNode) 63{ 64 Node* nodeToSplitTo = enclosingBlockToSplitTreeTo(start.deprecatedNode()); 65 RefPtr<Node> outerBlock = (start.deprecatedNode() == nodeToSplitTo) ? start.deprecatedNode() : splitTreeToNode(start.deprecatedNode(), nodeToSplitTo); 66 RefPtr<Node> nodeAfterInsertionPosition = outerBlock; 67 68 RefPtr<Range> range = Range::create(document(), start, endOfSelection); 69 Element* refNode = enclosingBlockFlowElement(end); 70 Element* root = editableRootForPosition(start); 71 // Root is null for elements with contenteditable=false. 72 if (!root || !refNode) 73 return; 74 if (isElementForFormatBlock(refNode->tagQName()) && start == startOfBlock(start) 75 && (end == endOfBlock(end) || isNodeVisiblyContainedWithin(refNode, range.get())) 76 && refNode != root && !root->isDescendantOf(refNode)) { 77 // Already in a block element that only contains the current paragraph 78 if (refNode->hasTagName(tagName())) 79 return; 80 nodeAfterInsertionPosition = refNode; 81 } 82 83 if (!blockNode) { 84 // Create a new blockquote and insert it as a child of the root editable element. We accomplish 85 // this by splitting all parents of the current paragraph up to that point. 86 blockNode = createBlockElement(); 87 insertNodeBefore(blockNode, nodeAfterInsertionPosition); 88 } 89 90 Position lastParagraphInBlockNode = blockNode->lastChild() ? positionAfterNode(blockNode->lastChild()) : Position(); 91 bool wasEndOfParagraph = isEndOfParagraph(lastParagraphInBlockNode); 92 93 moveParagraphWithClones(start, end, blockNode.get(), outerBlock.get()); 94 95 if (wasEndOfParagraph && !isEndOfParagraph(lastParagraphInBlockNode) && !isStartOfParagraph(lastParagraphInBlockNode)) 96 insertBlockPlaceholder(lastParagraphInBlockNode); 97} 98 99Element* FormatBlockCommand::elementForFormatBlockCommand(Range* range) 100{ 101 if (!range) 102 return 0; 103 104 Node* commonAncestor = range->commonAncestorContainer(IGNORE_EXCEPTION); 105 while (commonAncestor && !isElementForFormatBlock(commonAncestor)) 106 commonAncestor = commonAncestor->parentNode(); 107 108 if (!commonAncestor) 109 return 0; 110 111 Element* rootEditableElement = range->startContainer()->rootEditableElement(); 112 if (!rootEditableElement || commonAncestor->contains(rootEditableElement)) 113 return 0; 114 115 return commonAncestor->isElementNode() ? toElement(commonAncestor) : 0; 116} 117 118bool isElementForFormatBlock(const QualifiedName& tagName) 119{ 120 DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, blockTags, ()); 121 if (blockTags.isEmpty()) { 122 blockTags.add(addressTag); 123 blockTags.add(articleTag); 124 blockTags.add(asideTag); 125 blockTags.add(blockquoteTag); 126 blockTags.add(ddTag); 127 blockTags.add(divTag); 128 blockTags.add(dlTag); 129 blockTags.add(dtTag); 130 blockTags.add(footerTag); 131 blockTags.add(h1Tag); 132 blockTags.add(h2Tag); 133 blockTags.add(h3Tag); 134 blockTags.add(h4Tag); 135 blockTags.add(h5Tag); 136 blockTags.add(h6Tag); 137 blockTags.add(headerTag); 138 blockTags.add(hgroupTag); 139 blockTags.add(mainTag); 140 blockTags.add(navTag); 141 blockTags.add(pTag); 142 blockTags.add(preTag); 143 blockTags.add(sectionTag); 144 } 145 return blockTags.contains(tagName); 146} 147 148Node* enclosingBlockToSplitTreeTo(Node* startNode) 149{ 150 Node* lastBlock = startNode; 151 for (Node* n = startNode; n; n = n->parentNode()) { 152 if (!n->rendererIsEditable()) 153 return lastBlock; 154 if (isTableCell(n) || n->hasTagName(bodyTag) || !n->parentNode() || !n->parentNode()->rendererIsEditable() || isElementForFormatBlock(n)) 155 return n; 156 if (isBlock(n)) 157 lastBlock = n; 158 if (isListElement(n)) 159 return n->parentNode()->rendererIsEditable() ? n->parentNode() : n; 160 } 161 return lastBlock; 162} 163 164} 165