1 /*
2 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
3 * Copyright (C) 2008, 2009, 2010, 2011 Google Inc. All rights reserved.
4 * Copyright (C) 2011 Igalia S.L.
5 * Copyright (C) 2011 Motorola Mobility. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
24 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "config.h"
30 #include "core/editing/markup.h"
31
32 #include "CSSPropertyNames.h"
33 #include "CSSValueKeywords.h"
34 #include "HTMLNames.h"
35 #include "bindings/v8/ExceptionState.h"
36 #include "core/css/CSSPrimitiveValue.h"
37 #include "core/css/CSSValue.h"
38 #include "core/css/StylePropertySet.h"
39 #include "core/dom/CDATASection.h"
40 #include "core/dom/ChildListMutationScope.h"
41 #include "core/dom/ContextFeatures.h"
42 #include "core/dom/DocumentFragment.h"
43 #include "core/dom/ElementTraversal.h"
44 #include "core/dom/ExceptionCode.h"
45 #include "core/dom/NodeTraversal.h"
46 #include "core/dom/Range.h"
47 #include "core/editing/Editor.h"
48 #include "core/editing/MarkupAccumulator.h"
49 #include "core/editing/TextIterator.h"
50 #include "core/editing/VisibleSelection.h"
51 #include "core/editing/VisibleUnits.h"
52 #include "core/editing/htmlediting.h"
53 #include "core/html/HTMLBodyElement.h"
54 #include "core/html/HTMLElement.h"
55 #include "core/html/HTMLHtmlElement.h"
56 #include "core/html/HTMLTableElement.h"
57 #include "core/html/HTMLTextFormControlElement.h"
58 #include "core/frame/Frame.h"
59 #include "core/rendering/RenderObject.h"
60 #include "platform/weborigin/KURL.h"
61 #include "wtf/StdLibExtras.h"
62 #include "wtf/text/StringBuilder.h"
63
64 using namespace std;
65
66 namespace WebCore {
67
68 using namespace HTMLNames;
69
70 static bool propertyMissingOrEqualToNone(StylePropertySet*, CSSPropertyID);
71
72 class AttributeChange {
73 public:
AttributeChange()74 AttributeChange()
75 : m_name(nullAtom, nullAtom, nullAtom)
76 {
77 }
78
AttributeChange(PassRefPtr<Element> element,const QualifiedName & name,const String & value)79 AttributeChange(PassRefPtr<Element> element, const QualifiedName& name, const String& value)
80 : m_element(element), m_name(name), m_value(value)
81 {
82 }
83
apply()84 void apply()
85 {
86 m_element->setAttribute(m_name, AtomicString(m_value));
87 }
88
89 private:
90 RefPtr<Element> m_element;
91 QualifiedName m_name;
92 String m_value;
93 };
94
completeURLs(DocumentFragment & fragment,const String & baseURL)95 static void completeURLs(DocumentFragment& fragment, const String& baseURL)
96 {
97 Vector<AttributeChange> changes;
98
99 KURL parsedBaseURL(ParsedURLString, baseURL);
100
101 for (Element* element = ElementTraversal::firstWithin(fragment); element; element = ElementTraversal::next(*element, &fragment)) {
102 if (!element->hasAttributes())
103 continue;
104 unsigned length = element->attributeCount();
105 for (unsigned i = 0; i < length; i++) {
106 const Attribute* attribute = element->attributeItem(i);
107 if (element->isURLAttribute(*attribute) && !attribute->value().isEmpty())
108 changes.append(AttributeChange(element, attribute->name(), KURL(parsedBaseURL, attribute->value()).string()));
109 }
110 }
111
112 size_t numChanges = changes.size();
113 for (size_t i = 0; i < numChanges; ++i)
114 changes[i].apply();
115 }
116
117 class StyledMarkupAccumulator : public MarkupAccumulator {
118 public:
119 enum RangeFullySelectsNode { DoesFullySelectNode, DoesNotFullySelectNode };
120
121 StyledMarkupAccumulator(Vector<Node*>* nodes, EAbsoluteURLs, EAnnotateForInterchange, const Range*, Node* highestNodeToBeSerialized = 0);
122 Node* serializeNodes(Node* startNode, Node* pastEnd);
appendString(const String & s)123 virtual void appendString(const String& s) { return MarkupAccumulator::appendString(s); }
124 void wrapWithNode(Node*, bool convertBlocksToInlines = false, RangeFullySelectsNode = DoesFullySelectNode);
125 void wrapWithStyleNode(StylePropertySet*, Document*, bool isBlock = false);
126 String takeResults();
127
128 private:
129 void appendStyleNodeOpenTag(StringBuilder&, StylePropertySet*, Document*, bool isBlock = false);
130 const String& styleNodeCloseTag(bool isBlock = false);
131 virtual void appendText(StringBuilder& out, Text*);
132 String renderedText(const Node*, const Range*);
133 String stringValueForRange(const Node*, const Range*);
134 void appendElement(StringBuilder& out, Element*, bool addDisplayInline, RangeFullySelectsNode);
appendElement(StringBuilder & out,Element * element,Namespaces *)135 void appendElement(StringBuilder& out, Element* element, Namespaces*) { appendElement(out, element, false, DoesFullySelectNode); }
136
137 enum NodeTraversalMode { EmitString, DoNotEmitString };
138 Node* traverseNodesForSerialization(Node* startNode, Node* pastEnd, NodeTraversalMode);
139
shouldAnnotate()140 bool shouldAnnotate() { return m_shouldAnnotate == AnnotateForInterchange; }
shouldApplyWrappingStyle(Node * node) const141 bool shouldApplyWrappingStyle(Node* node) const
142 {
143 return m_highestNodeToBeSerialized && m_highestNodeToBeSerialized->parentNode() == node->parentNode()
144 && m_wrappingStyle && m_wrappingStyle->style();
145 }
146
147 Vector<String> m_reversedPrecedingMarkup;
148 const EAnnotateForInterchange m_shouldAnnotate;
149 Node* m_highestNodeToBeSerialized;
150 RefPtr<EditingStyle> m_wrappingStyle;
151 };
152
StyledMarkupAccumulator(Vector<Node * > * nodes,EAbsoluteURLs shouldResolveURLs,EAnnotateForInterchange shouldAnnotate,const Range * range,Node * highestNodeToBeSerialized)153 inline StyledMarkupAccumulator::StyledMarkupAccumulator(Vector<Node*>* nodes, EAbsoluteURLs shouldResolveURLs, EAnnotateForInterchange shouldAnnotate,
154 const Range* range, Node* highestNodeToBeSerialized)
155 : MarkupAccumulator(nodes, shouldResolveURLs, range)
156 , m_shouldAnnotate(shouldAnnotate)
157 , m_highestNodeToBeSerialized(highestNodeToBeSerialized)
158 {
159 }
160
wrapWithNode(Node * node,bool convertBlocksToInlines,RangeFullySelectsNode rangeFullySelectsNode)161 void StyledMarkupAccumulator::wrapWithNode(Node* node, bool convertBlocksToInlines, RangeFullySelectsNode rangeFullySelectsNode)
162 {
163 StringBuilder markup;
164 if (node->isElementNode())
165 appendElement(markup, toElement(node), convertBlocksToInlines && isBlock(const_cast<Node*>(node)), rangeFullySelectsNode);
166 else
167 appendStartMarkup(markup, node, 0);
168 m_reversedPrecedingMarkup.append(markup.toString());
169 appendEndTag(node);
170 if (m_nodes)
171 m_nodes->append(node);
172 }
173
wrapWithStyleNode(StylePropertySet * style,Document * document,bool isBlock)174 void StyledMarkupAccumulator::wrapWithStyleNode(StylePropertySet* style, Document* document, bool isBlock)
175 {
176 StringBuilder openTag;
177 appendStyleNodeOpenTag(openTag, style, document, isBlock);
178 m_reversedPrecedingMarkup.append(openTag.toString());
179 appendString(styleNodeCloseTag(isBlock));
180 }
181
appendStyleNodeOpenTag(StringBuilder & out,StylePropertySet * style,Document * document,bool isBlock)182 void StyledMarkupAccumulator::appendStyleNodeOpenTag(StringBuilder& out, StylePropertySet* style, Document* document, bool isBlock)
183 {
184 // wrappingStyleForSerialization should have removed -webkit-text-decorations-in-effect
185 ASSERT(propertyMissingOrEqualToNone(style, CSSPropertyWebkitTextDecorationsInEffect));
186 if (isBlock)
187 out.appendLiteral("<div style=\"");
188 else
189 out.appendLiteral("<span style=\"");
190 appendAttributeValue(out, style->asText(), document->isHTMLDocument());
191 out.append('\"');
192 out.append('>');
193 }
194
styleNodeCloseTag(bool isBlock)195 const String& StyledMarkupAccumulator::styleNodeCloseTag(bool isBlock)
196 {
197 DEFINE_STATIC_LOCAL(const String, divClose, ("</div>"));
198 DEFINE_STATIC_LOCAL(const String, styleSpanClose, ("</span>"));
199 return isBlock ? divClose : styleSpanClose;
200 }
201
takeResults()202 String StyledMarkupAccumulator::takeResults()
203 {
204 StringBuilder result;
205 result.reserveCapacity(totalLength(m_reversedPrecedingMarkup) + length());
206
207 for (size_t i = m_reversedPrecedingMarkup.size(); i > 0; --i)
208 result.append(m_reversedPrecedingMarkup[i - 1]);
209
210 concatenateMarkup(result);
211
212 // We remove '\0' characters because they are not visibly rendered to the user.
213 return result.toString().replace(0, "");
214 }
215
appendText(StringBuilder & out,Text * text)216 void StyledMarkupAccumulator::appendText(StringBuilder& out, Text* text)
217 {
218 const bool parentIsTextarea = text->parentElement() && text->parentElement()->tagQName() == textareaTag;
219 const bool wrappingSpan = shouldApplyWrappingStyle(text) && !parentIsTextarea;
220 if (wrappingSpan) {
221 RefPtr<EditingStyle> wrappingStyle = m_wrappingStyle->copy();
222 // FIXME: <rdar://problem/5371536> Style rules that match pasted content can change it's appearance
223 // Make sure spans are inline style in paste side e.g. span { display: block }.
224 wrappingStyle->forceInline();
225 // FIXME: Should this be included in forceInline?
226 wrappingStyle->style()->setProperty(CSSPropertyFloat, CSSValueNone);
227
228 appendStyleNodeOpenTag(out, wrappingStyle->style(), &text->document());
229 }
230
231 if (!shouldAnnotate() || parentIsTextarea)
232 MarkupAccumulator::appendText(out, text);
233 else {
234 const bool useRenderedText = !enclosingNodeWithTag(firstPositionInNode(text), selectTag);
235 String content = useRenderedText ? renderedText(text, m_range) : stringValueForRange(text, m_range);
236 StringBuilder buffer;
237 appendCharactersReplacingEntities(buffer, content, 0, content.length(), EntityMaskInPCDATA);
238 out.append(convertHTMLTextToInterchangeFormat(buffer.toString(), text));
239 }
240
241 if (wrappingSpan)
242 out.append(styleNodeCloseTag());
243 }
244
renderedText(const Node * node,const Range * range)245 String StyledMarkupAccumulator::renderedText(const Node* node, const Range* range)
246 {
247 if (!node->isTextNode())
248 return String();
249
250 const Text* textNode = toText(node);
251 unsigned startOffset = 0;
252 unsigned endOffset = textNode->length();
253
254 if (range && node == range->startContainer())
255 startOffset = range->startOffset();
256 if (range && node == range->endContainer())
257 endOffset = range->endOffset();
258
259 Position start = createLegacyEditingPosition(const_cast<Node*>(node), startOffset);
260 Position end = createLegacyEditingPosition(const_cast<Node*>(node), endOffset);
261 return plainText(Range::create(node->document(), start, end).get());
262 }
263
stringValueForRange(const Node * node,const Range * range)264 String StyledMarkupAccumulator::stringValueForRange(const Node* node, const Range* range)
265 {
266 if (!range)
267 return node->nodeValue();
268
269 String str = node->nodeValue();
270 if (node == range->endContainer())
271 str.truncate(range->endOffset());
272 if (node == range->startContainer())
273 str.remove(0, range->startOffset());
274 return str;
275 }
276
appendElement(StringBuilder & out,Element * element,bool addDisplayInline,RangeFullySelectsNode rangeFullySelectsNode)277 void StyledMarkupAccumulator::appendElement(StringBuilder& out, Element* element, bool addDisplayInline, RangeFullySelectsNode rangeFullySelectsNode)
278 {
279 const bool documentIsHTML = element->document().isHTMLDocument();
280 appendOpenTag(out, element, 0);
281
282 const unsigned length = element->hasAttributes() ? element->attributeCount() : 0;
283 const bool shouldAnnotateOrForceInline = element->isHTMLElement() && (shouldAnnotate() || addDisplayInline);
284 const bool shouldOverrideStyleAttr = shouldAnnotateOrForceInline || shouldApplyWrappingStyle(element);
285 for (unsigned i = 0; i < length; ++i) {
286 const Attribute* attribute = element->attributeItem(i);
287 // We'll handle the style attribute separately, below.
288 if (attribute->name() == styleAttr && shouldOverrideStyleAttr)
289 continue;
290 appendAttribute(out, element, *attribute, 0);
291 }
292
293 if (shouldOverrideStyleAttr) {
294 RefPtr<EditingStyle> newInlineStyle;
295
296 if (shouldApplyWrappingStyle(element)) {
297 newInlineStyle = m_wrappingStyle->copy();
298 newInlineStyle->removePropertiesInElementDefaultStyle(element);
299 newInlineStyle->removeStyleConflictingWithStyleOfNode(element);
300 } else
301 newInlineStyle = EditingStyle::create();
302
303 if (element->isStyledElement() && element->inlineStyle())
304 newInlineStyle->overrideWithStyle(element->inlineStyle());
305
306 if (shouldAnnotateOrForceInline) {
307 if (shouldAnnotate())
308 newInlineStyle->mergeStyleFromRulesForSerialization(toHTMLElement(element));
309
310 if (addDisplayInline)
311 newInlineStyle->forceInline();
312
313 // If the node is not fully selected by the range, then we don't want to keep styles that affect its relationship to the nodes around it
314 // only the ones that affect it and the nodes within it.
315 if (rangeFullySelectsNode == DoesNotFullySelectNode && newInlineStyle->style())
316 newInlineStyle->style()->removeProperty(CSSPropertyFloat);
317 }
318
319 if (!newInlineStyle->isEmpty()) {
320 out.appendLiteral(" style=\"");
321 appendAttributeValue(out, newInlineStyle->style()->asText(), documentIsHTML);
322 out.append('\"');
323 }
324 }
325
326 appendCloseTag(out, element);
327 }
328
serializeNodes(Node * startNode,Node * pastEnd)329 Node* StyledMarkupAccumulator::serializeNodes(Node* startNode, Node* pastEnd)
330 {
331 if (!m_highestNodeToBeSerialized) {
332 Node* lastClosed = traverseNodesForSerialization(startNode, pastEnd, DoNotEmitString);
333 m_highestNodeToBeSerialized = lastClosed;
334 }
335
336 if (m_highestNodeToBeSerialized && m_highestNodeToBeSerialized->parentNode())
337 m_wrappingStyle = EditingStyle::wrappingStyleForSerialization(m_highestNodeToBeSerialized->parentNode(), shouldAnnotate());
338
339 return traverseNodesForSerialization(startNode, pastEnd, EmitString);
340 }
341
traverseNodesForSerialization(Node * startNode,Node * pastEnd,NodeTraversalMode traversalMode)342 Node* StyledMarkupAccumulator::traverseNodesForSerialization(Node* startNode, Node* pastEnd, NodeTraversalMode traversalMode)
343 {
344 const bool shouldEmit = traversalMode == EmitString;
345 Vector<Node*> ancestorsToClose;
346 Node* next;
347 Node* lastClosed = 0;
348 for (Node* n = startNode; n != pastEnd; n = next) {
349 // According to <rdar://problem/5730668>, it is possible for n to blow
350 // past pastEnd and become null here. This shouldn't be possible.
351 // This null check will prevent crashes (but create too much markup)
352 // and the ASSERT will hopefully lead us to understanding the problem.
353 ASSERT(n);
354 if (!n)
355 break;
356
357 next = NodeTraversal::next(*n);
358 bool openedTag = false;
359
360 if (isBlock(n) && canHaveChildrenForEditing(n) && next == pastEnd)
361 // Don't write out empty block containers that aren't fully selected.
362 continue;
363
364 if (!n->renderer() && !enclosingNodeWithTag(firstPositionInOrBeforeNode(n), selectTag)) {
365 next = NodeTraversal::nextSkippingChildren(*n);
366 // Don't skip over pastEnd.
367 if (pastEnd && pastEnd->isDescendantOf(n))
368 next = pastEnd;
369 } else {
370 // Add the node to the markup if we're not skipping the descendants
371 if (shouldEmit)
372 appendStartTag(n);
373
374 // If node has no children, close the tag now.
375 if (!n->childNodeCount()) {
376 if (shouldEmit)
377 appendEndTag(n);
378 lastClosed = n;
379 } else {
380 openedTag = true;
381 ancestorsToClose.append(n);
382 }
383 }
384
385 // If we didn't insert open tag and there's no more siblings or we're at the end of the traversal, take care of ancestors.
386 // FIXME: What happens if we just inserted open tag and reached the end?
387 if (!openedTag && (!n->nextSibling() || next == pastEnd)) {
388 // Close up the ancestors.
389 while (!ancestorsToClose.isEmpty()) {
390 Node* ancestor = ancestorsToClose.last();
391 if (next != pastEnd && next->isDescendantOf(ancestor))
392 break;
393 // Not at the end of the range, close ancestors up to sibling of next node.
394 if (shouldEmit)
395 appendEndTag(ancestor);
396 lastClosed = ancestor;
397 ancestorsToClose.removeLast();
398 }
399
400 // Surround the currently accumulated markup with markup for ancestors we never opened as we leave the subtree(s) rooted at those ancestors.
401 ContainerNode* nextParent = next ? next->parentNode() : 0;
402 if (next != pastEnd && n != nextParent) {
403 Node* lastAncestorClosedOrSelf = n->isDescendantOf(lastClosed) ? lastClosed : n;
404 for (ContainerNode* parent = lastAncestorClosedOrSelf->parentNode(); parent && parent != nextParent; parent = parent->parentNode()) {
405 // All ancestors that aren't in the ancestorsToClose list should either be a) unrendered:
406 if (!parent->renderer())
407 continue;
408 // or b) ancestors that we never encountered during a pre-order traversal starting at startNode:
409 ASSERT(startNode->isDescendantOf(parent));
410 if (shouldEmit)
411 wrapWithNode(parent);
412 lastClosed = parent;
413 }
414 }
415 }
416 }
417
418 return lastClosed;
419 }
420
isHTMLBlockElement(const Node * node)421 static bool isHTMLBlockElement(const Node* node)
422 {
423 return node->hasTagName(tdTag)
424 || node->hasTagName(thTag)
425 || isNonTableCellHTMLBlockElement(node);
426 }
427
ancestorToRetainStructureAndAppearanceForBlock(Node * commonAncestorBlock)428 static Node* ancestorToRetainStructureAndAppearanceForBlock(Node* commonAncestorBlock)
429 {
430 if (!commonAncestorBlock)
431 return 0;
432
433 if (commonAncestorBlock->hasTagName(tbodyTag) || commonAncestorBlock->hasTagName(trTag)) {
434 ContainerNode* table = commonAncestorBlock->parentNode();
435 while (table && !isHTMLTableElement(table))
436 table = table->parentNode();
437
438 return table;
439 }
440
441 if (isNonTableCellHTMLBlockElement(commonAncestorBlock))
442 return commonAncestorBlock;
443
444 return 0;
445 }
446
ancestorToRetainStructureAndAppearance(Node * commonAncestor)447 static inline Node* ancestorToRetainStructureAndAppearance(Node* commonAncestor)
448 {
449 return ancestorToRetainStructureAndAppearanceForBlock(enclosingBlock(commonAncestor));
450 }
451
ancestorToRetainStructureAndAppearanceWithNoRenderer(Node * commonAncestor)452 static inline Node* ancestorToRetainStructureAndAppearanceWithNoRenderer(Node* commonAncestor)
453 {
454 Node* commonAncestorBlock = enclosingNodeOfType(firstPositionInOrBeforeNode(commonAncestor), isHTMLBlockElement);
455 return ancestorToRetainStructureAndAppearanceForBlock(commonAncestorBlock);
456 }
457
propertyMissingOrEqualToNone(StylePropertySet * style,CSSPropertyID propertyID)458 static bool propertyMissingOrEqualToNone(StylePropertySet* style, CSSPropertyID propertyID)
459 {
460 if (!style)
461 return false;
462 RefPtr<CSSValue> value = style->getPropertyCSSValue(propertyID);
463 if (!value)
464 return true;
465 if (!value->isPrimitiveValue())
466 return false;
467 return toCSSPrimitiveValue(value.get())->getValueID() == CSSValueNone;
468 }
469
needInterchangeNewlineAfter(const VisiblePosition & v)470 static bool needInterchangeNewlineAfter(const VisiblePosition& v)
471 {
472 VisiblePosition next = v.next();
473 Node* upstreamNode = next.deepEquivalent().upstream().deprecatedNode();
474 Node* downstreamNode = v.deepEquivalent().downstream().deprecatedNode();
475 // Add an interchange newline if a paragraph break is selected and a br won't already be added to the markup to represent it.
476 return isEndOfParagraph(v) && isStartOfParagraph(next) && !(upstreamNode->hasTagName(brTag) && upstreamNode == downstreamNode);
477 }
478
styleFromMatchedRulesAndInlineDecl(const Node * node)479 static PassRefPtr<EditingStyle> styleFromMatchedRulesAndInlineDecl(const Node* node)
480 {
481 if (!node->isHTMLElement())
482 return 0;
483
484 // FIXME: Having to const_cast here is ugly, but it is quite a bit of work to untangle
485 // the non-const-ness of styleFromMatchedRulesForElement.
486 HTMLElement* element = const_cast<HTMLElement*>(toHTMLElement(node));
487 RefPtr<EditingStyle> style = EditingStyle::create(element->inlineStyle());
488 style->mergeStyleFromRules(element);
489 return style.release();
490 }
491
isElementPresentational(const Node * node)492 static bool isElementPresentational(const Node* node)
493 {
494 return node->hasTagName(uTag) || node->hasTagName(sTag) || node->hasTagName(strikeTag)
495 || node->hasTagName(iTag) || node->hasTagName(emTag) || node->hasTagName(bTag) || node->hasTagName(strongTag);
496 }
497
highestAncestorToWrapMarkup(const Range * range,EAnnotateForInterchange shouldAnnotate,Node * constrainingAncestor)498 static Node* highestAncestorToWrapMarkup(const Range* range, EAnnotateForInterchange shouldAnnotate, Node* constrainingAncestor)
499 {
500 Node* commonAncestor = range->commonAncestorContainer(IGNORE_EXCEPTION);
501 ASSERT(commonAncestor);
502 Node* specialCommonAncestor = 0;
503 if (shouldAnnotate == AnnotateForInterchange) {
504 // Include ancestors that aren't completely inside the range but are required to retain
505 // the structure and appearance of the copied markup.
506 specialCommonAncestor = ancestorToRetainStructureAndAppearance(commonAncestor);
507
508 if (Node* parentListNode = enclosingNodeOfType(firstPositionInOrBeforeNode(range->firstNode()), isListItem)) {
509 if (WebCore::areRangesEqual(VisibleSelection::selectionFromContentsOfNode(parentListNode).toNormalizedRange().get(), range)) {
510 specialCommonAncestor = parentListNode->parentNode();
511 while (specialCommonAncestor && !isListElement(specialCommonAncestor))
512 specialCommonAncestor = specialCommonAncestor->parentNode();
513 }
514 }
515
516 // Retain the Mail quote level by including all ancestor mail block quotes.
517 if (Node* highestMailBlockquote = highestEnclosingNodeOfType(firstPositionInOrBeforeNode(range->firstNode()), isMailBlockquote, CanCrossEditingBoundary))
518 specialCommonAncestor = highestMailBlockquote;
519 }
520
521 Node* checkAncestor = specialCommonAncestor ? specialCommonAncestor : commonAncestor;
522 if (checkAncestor->renderer()) {
523 Node* newSpecialCommonAncestor = highestEnclosingNodeOfType(firstPositionInNode(checkAncestor), &isElementPresentational, CanCrossEditingBoundary, constrainingAncestor);
524 if (newSpecialCommonAncestor)
525 specialCommonAncestor = newSpecialCommonAncestor;
526 }
527
528 // If a single tab is selected, commonAncestor will be a text node inside a tab span.
529 // If two or more tabs are selected, commonAncestor will be the tab span.
530 // In either case, if there is a specialCommonAncestor already, it will necessarily be above
531 // any tab span that needs to be included.
532 if (!specialCommonAncestor && isTabSpanTextNode(commonAncestor))
533 specialCommonAncestor = commonAncestor->parentNode();
534 if (!specialCommonAncestor && isTabSpanNode(commonAncestor))
535 specialCommonAncestor = commonAncestor;
536
537 if (Node *enclosingAnchor = enclosingNodeWithTag(firstPositionInNode(specialCommonAncestor ? specialCommonAncestor : commonAncestor), aTag))
538 specialCommonAncestor = enclosingAnchor;
539
540 return specialCommonAncestor;
541 }
542
543 // FIXME: Shouldn't we omit style info when annotate == DoNotAnnotateForInterchange?
544 // FIXME: At least, annotation and style info should probably not be included in range.markupString()
createMarkupInternal(Document & document,const Range * range,const Range * updatedRange,Vector<Node * > * nodes,EAnnotateForInterchange shouldAnnotate,bool convertBlocksToInlines,EAbsoluteURLs shouldResolveURLs,Node * constrainingAncestor)545 static String createMarkupInternal(Document& document, const Range* range, const Range* updatedRange, Vector<Node*>* nodes,
546 EAnnotateForInterchange shouldAnnotate, bool convertBlocksToInlines, EAbsoluteURLs shouldResolveURLs, Node* constrainingAncestor)
547 {
548 ASSERT(range);
549 ASSERT(updatedRange);
550 DEFINE_STATIC_LOCAL(const String, interchangeNewlineString, ("<br class=\"" AppleInterchangeNewline "\">"));
551
552 bool collapsed = updatedRange->collapsed(ASSERT_NO_EXCEPTION);
553 if (collapsed)
554 return emptyString();
555 Node* commonAncestor = updatedRange->commonAncestorContainer(ASSERT_NO_EXCEPTION);
556 if (!commonAncestor)
557 return emptyString();
558
559 document.updateLayoutIgnorePendingStylesheets();
560
561 Node* body = enclosingNodeWithTag(firstPositionInNode(commonAncestor), bodyTag);
562 Node* fullySelectedRoot = 0;
563 // FIXME: Do this for all fully selected blocks, not just the body.
564 if (body && areRangesEqual(VisibleSelection::selectionFromContentsOfNode(body).toNormalizedRange().get(), range))
565 fullySelectedRoot = body;
566 Node* specialCommonAncestor = highestAncestorToWrapMarkup(updatedRange, shouldAnnotate, constrainingAncestor);
567 StyledMarkupAccumulator accumulator(nodes, shouldResolveURLs, shouldAnnotate, updatedRange, specialCommonAncestor);
568 Node* pastEnd = updatedRange->pastLastNode();
569
570 Node* startNode = updatedRange->firstNode();
571 VisiblePosition visibleStart(updatedRange->startPosition(), VP_DEFAULT_AFFINITY);
572 VisiblePosition visibleEnd(updatedRange->endPosition(), VP_DEFAULT_AFFINITY);
573 if (shouldAnnotate == AnnotateForInterchange && needInterchangeNewlineAfter(visibleStart)) {
574 if (visibleStart == visibleEnd.previous())
575 return interchangeNewlineString;
576
577 accumulator.appendString(interchangeNewlineString);
578 startNode = visibleStart.next().deepEquivalent().deprecatedNode();
579
580 if (pastEnd && Range::compareBoundaryPoints(startNode, 0, pastEnd, 0, ASSERT_NO_EXCEPTION) >= 0)
581 return interchangeNewlineString;
582 }
583
584 Node* lastClosed = accumulator.serializeNodes(startNode, pastEnd);
585
586 if (specialCommonAncestor && lastClosed) {
587 // Also include all of the ancestors of lastClosed up to this special ancestor.
588 for (ContainerNode* ancestor = lastClosed->parentNode(); ancestor; ancestor = ancestor->parentNode()) {
589 if (ancestor == fullySelectedRoot && !convertBlocksToInlines) {
590 RefPtr<EditingStyle> fullySelectedRootStyle = styleFromMatchedRulesAndInlineDecl(fullySelectedRoot);
591
592 // Bring the background attribute over, but not as an attribute because a background attribute on a div
593 // appears to have no effect.
594 if ((!fullySelectedRootStyle || !fullySelectedRootStyle->style() || !fullySelectedRootStyle->style()->getPropertyCSSValue(CSSPropertyBackgroundImage))
595 && toElement(fullySelectedRoot)->hasAttribute(backgroundAttr))
596 fullySelectedRootStyle->style()->setProperty(CSSPropertyBackgroundImage, "url('" + toElement(fullySelectedRoot)->getAttribute(backgroundAttr) + "')");
597
598 if (fullySelectedRootStyle->style()) {
599 // Reset the CSS properties to avoid an assertion error in addStyleMarkup().
600 // This assertion is caused at least when we select all text of a <body> element whose
601 // 'text-decoration' property is "inherit", and copy it.
602 if (!propertyMissingOrEqualToNone(fullySelectedRootStyle->style(), CSSPropertyTextDecoration))
603 fullySelectedRootStyle->style()->setProperty(CSSPropertyTextDecoration, CSSValueNone);
604 if (!propertyMissingOrEqualToNone(fullySelectedRootStyle->style(), CSSPropertyWebkitTextDecorationsInEffect))
605 fullySelectedRootStyle->style()->setProperty(CSSPropertyWebkitTextDecorationsInEffect, CSSValueNone);
606 accumulator.wrapWithStyleNode(fullySelectedRootStyle->style(), &document, true);
607 }
608 } else {
609 // Since this node and all the other ancestors are not in the selection we want to set RangeFullySelectsNode to DoesNotFullySelectNode
610 // so that styles that affect the exterior of the node are not included.
611 accumulator.wrapWithNode(ancestor, convertBlocksToInlines, StyledMarkupAccumulator::DoesNotFullySelectNode);
612 }
613 if (nodes)
614 nodes->append(ancestor);
615
616 lastClosed = ancestor;
617
618 if (ancestor == specialCommonAncestor)
619 break;
620 }
621 }
622
623 // FIXME: The interchange newline should be placed in the block that it's in, not after all of the content, unconditionally.
624 if (shouldAnnotate == AnnotateForInterchange && needInterchangeNewlineAfter(visibleEnd.previous()))
625 accumulator.appendString(interchangeNewlineString);
626
627 return accumulator.takeResults();
628 }
629
createMarkup(const Range * range,Vector<Node * > * nodes,EAnnotateForInterchange shouldAnnotate,bool convertBlocksToInlines,EAbsoluteURLs shouldResolveURLs,Node * constrainingAncestor)630 String createMarkup(const Range* range, Vector<Node*>* nodes, EAnnotateForInterchange shouldAnnotate, bool convertBlocksToInlines, EAbsoluteURLs shouldResolveURLs, Node* constrainingAncestor)
631 {
632 if (!range)
633 return emptyString();
634
635 Document& document = range->ownerDocument();
636 const Range* updatedRange = range;
637
638 return createMarkupInternal(document, range, updatedRange, nodes, shouldAnnotate, convertBlocksToInlines, shouldResolveURLs, constrainingAncestor);
639 }
640
createFragmentFromMarkup(Document & document,const String & markup,const String & baseURL,ParserContentPolicy parserContentPolicy)641 PassRefPtr<DocumentFragment> createFragmentFromMarkup(Document& document, const String& markup, const String& baseURL, ParserContentPolicy parserContentPolicy)
642 {
643 // We use a fake body element here to trick the HTML parser to using the InBody insertion mode.
644 RefPtr<HTMLBodyElement> fakeBody = HTMLBodyElement::create(document);
645 RefPtr<DocumentFragment> fragment = DocumentFragment::create(document);
646
647 fragment->parseHTML(markup, fakeBody.get(), parserContentPolicy);
648
649 if (!baseURL.isEmpty() && baseURL != blankURL() && baseURL != document.baseURL())
650 completeURLs(*fragment, baseURL);
651
652 return fragment.release();
653 }
654
655 static const char fragmentMarkerTag[] = "webkit-fragment-marker";
656
findNodesSurroundingContext(Document * document,RefPtr<Node> & nodeBeforeContext,RefPtr<Node> & nodeAfterContext)657 static bool findNodesSurroundingContext(Document* document, RefPtr<Node>& nodeBeforeContext, RefPtr<Node>& nodeAfterContext)
658 {
659 for (Node* node = document->firstChild(); node; node = NodeTraversal::next(*node)) {
660 if (node->nodeType() == Node::COMMENT_NODE && toCharacterData(node)->data() == fragmentMarkerTag) {
661 if (!nodeBeforeContext)
662 nodeBeforeContext = node;
663 else {
664 nodeAfterContext = node;
665 return true;
666 }
667 }
668 }
669 return false;
670 }
671
trimFragment(DocumentFragment * fragment,Node * nodeBeforeContext,Node * nodeAfterContext)672 static void trimFragment(DocumentFragment* fragment, Node* nodeBeforeContext, Node* nodeAfterContext)
673 {
674 RefPtr<Node> next;
675 for (RefPtr<Node> node = fragment->firstChild(); node; node = next) {
676 if (nodeBeforeContext->isDescendantOf(node.get())) {
677 next = NodeTraversal::next(*node);
678 continue;
679 }
680 next = NodeTraversal::nextSkippingChildren(*node);
681 ASSERT(!node->contains(nodeAfterContext));
682 node->parentNode()->removeChild(node.get(), ASSERT_NO_EXCEPTION);
683 if (nodeBeforeContext == node)
684 break;
685 }
686
687 ASSERT(nodeAfterContext->parentNode());
688 for (RefPtr<Node> node = nodeAfterContext; node; node = next) {
689 next = NodeTraversal::nextSkippingChildren(*node);
690 node->parentNode()->removeChild(node.get(), ASSERT_NO_EXCEPTION);
691 }
692 }
693
createFragmentFromMarkupWithContext(Document & document,const String & markup,unsigned fragmentStart,unsigned fragmentEnd,const String & baseURL,ParserContentPolicy parserContentPolicy)694 PassRefPtr<DocumentFragment> createFragmentFromMarkupWithContext(Document& document, const String& markup, unsigned fragmentStart, unsigned fragmentEnd,
695 const String& baseURL, ParserContentPolicy parserContentPolicy)
696 {
697 // FIXME: Need to handle the case where the markup already contains these markers.
698
699 StringBuilder taggedMarkup;
700 taggedMarkup.append(markup.left(fragmentStart));
701 MarkupAccumulator::appendComment(taggedMarkup, fragmentMarkerTag);
702 taggedMarkup.append(markup.substring(fragmentStart, fragmentEnd - fragmentStart));
703 MarkupAccumulator::appendComment(taggedMarkup, fragmentMarkerTag);
704 taggedMarkup.append(markup.substring(fragmentEnd));
705
706 RefPtr<DocumentFragment> taggedFragment = createFragmentFromMarkup(document, taggedMarkup.toString(), baseURL, parserContentPolicy);
707 RefPtr<Document> taggedDocument = Document::create();
708 taggedDocument->setContextFeatures(document.contextFeatures());
709
710 // FIXME: It's not clear what this code is trying to do. It puts nodes as direct children of a
711 // Document that are not normally allowed by using the parser machinery.
712 taggedDocument->parserTakeAllChildrenFrom(*taggedFragment);
713
714 RefPtr<Node> nodeBeforeContext;
715 RefPtr<Node> nodeAfterContext;
716 if (!findNodesSurroundingContext(taggedDocument.get(), nodeBeforeContext, nodeAfterContext))
717 return 0;
718
719 RefPtr<Range> range = Range::create(*taggedDocument.get(),
720 positionAfterNode(nodeBeforeContext.get()).parentAnchoredEquivalent(),
721 positionBeforeNode(nodeAfterContext.get()).parentAnchoredEquivalent());
722
723 Node* commonAncestor = range->commonAncestorContainer(ASSERT_NO_EXCEPTION);
724 Node* specialCommonAncestor = ancestorToRetainStructureAndAppearanceWithNoRenderer(commonAncestor);
725
726 // When there's a special common ancestor outside of the fragment, we must include it as well to
727 // preserve the structure and appearance of the fragment. For example, if the fragment contains
728 // TD, we need to include the enclosing TABLE tag as well.
729 RefPtr<DocumentFragment> fragment = DocumentFragment::create(document);
730 if (specialCommonAncestor)
731 fragment->appendChild(specialCommonAncestor);
732 else
733 fragment->parserTakeAllChildrenFrom(toContainerNode(*commonAncestor));
734
735 trimFragment(fragment.get(), nodeBeforeContext.get(), nodeAfterContext.get());
736
737 return fragment;
738 }
739
createMarkup(const Node * node,EChildrenOnly childrenOnly,Vector<Node * > * nodes,EAbsoluteURLs shouldResolveURLs,Vector<QualifiedName> * tagNamesToSkip)740 String createMarkup(const Node* node, EChildrenOnly childrenOnly, Vector<Node*>* nodes, EAbsoluteURLs shouldResolveURLs, Vector<QualifiedName>* tagNamesToSkip)
741 {
742 if (!node)
743 return "";
744
745 MarkupAccumulator accumulator(nodes, shouldResolveURLs);
746 return accumulator.serializeNodes(const_cast<Node*>(node), childrenOnly, tagNamesToSkip);
747 }
748
fillContainerFromString(ContainerNode * paragraph,const String & string)749 static void fillContainerFromString(ContainerNode* paragraph, const String& string)
750 {
751 Document& document = paragraph->document();
752
753 if (string.isEmpty()) {
754 paragraph->appendChild(createBlockPlaceholderElement(document));
755 return;
756 }
757
758 ASSERT(string.find('\n') == kNotFound);
759
760 Vector<String> tabList;
761 string.split('\t', true, tabList);
762 String tabText = emptyString();
763 bool first = true;
764 size_t numEntries = tabList.size();
765 for (size_t i = 0; i < numEntries; ++i) {
766 const String& s = tabList[i];
767
768 // append the non-tab textual part
769 if (!s.isEmpty()) {
770 if (!tabText.isEmpty()) {
771 paragraph->appendChild(createTabSpanElement(document, tabText));
772 tabText = emptyString();
773 }
774 RefPtr<Node> textNode = document.createTextNode(stringWithRebalancedWhitespace(s, first, i + 1 == numEntries));
775 paragraph->appendChild(textNode.release());
776 }
777
778 // there is a tab after every entry, except the last entry
779 // (if the last character is a tab, the list gets an extra empty entry)
780 if (i + 1 != numEntries)
781 tabText.append('\t');
782 else if (!tabText.isEmpty())
783 paragraph->appendChild(createTabSpanElement(document, tabText));
784
785 first = false;
786 }
787 }
788
isPlainTextMarkup(Node * node)789 bool isPlainTextMarkup(Node *node)
790 {
791 if (!node->isElementNode() || !node->hasTagName(divTag) || toElement(node)->hasAttributes())
792 return false;
793
794 if (node->childNodeCount() == 1 && (node->firstChild()->isTextNode() || (node->firstChild()->firstChild())))
795 return true;
796
797 return (node->childNodeCount() == 2 && isTabSpanTextNode(node->firstChild()->firstChild()) && node->firstChild()->nextSibling()->isTextNode());
798 }
799
shouldPreserveNewline(const Range & range)800 static bool shouldPreserveNewline(const Range& range)
801 {
802 if (Node* node = range.firstNode()) {
803 if (RenderObject* renderer = node->renderer())
804 return renderer->style()->preserveNewline();
805 }
806
807 if (Node* node = range.startPosition().anchorNode()) {
808 if (RenderObject* renderer = node->renderer())
809 return renderer->style()->preserveNewline();
810 }
811
812 return false;
813 }
814
createFragmentFromText(Range * context,const String & text)815 PassRefPtr<DocumentFragment> createFragmentFromText(Range* context, const String& text)
816 {
817 if (!context)
818 return 0;
819
820 Document& document = context->ownerDocument();
821 RefPtr<DocumentFragment> fragment = document.createDocumentFragment();
822
823 if (text.isEmpty())
824 return fragment.release();
825
826 String string = text;
827 string.replace("\r\n", "\n");
828 string.replace('\r', '\n');
829
830 if (shouldPreserveNewline(*context)) {
831 fragment->appendChild(document.createTextNode(string));
832 if (string.endsWith('\n')) {
833 RefPtr<Element> element = createBreakElement(document);
834 element->setAttribute(classAttr, AppleInterchangeNewline);
835 fragment->appendChild(element.release());
836 }
837 return fragment.release();
838 }
839
840 // A string with no newlines gets added inline, rather than being put into a paragraph.
841 if (string.find('\n') == kNotFound) {
842 fillContainerFromString(fragment.get(), string);
843 return fragment.release();
844 }
845
846 // Break string into paragraphs. Extra line breaks turn into empty paragraphs.
847 Node* blockNode = enclosingBlock(context->firstNode());
848 Element* block = toElement(blockNode);
849 bool useClonesOfEnclosingBlock = blockNode
850 && blockNode->isElementNode()
851 && !block->hasTagName(bodyTag)
852 && !isHTMLHtmlElement(block)
853 && block != editableRootForPosition(context->startPosition());
854 bool useLineBreak = enclosingTextFormControl(context->startPosition());
855
856 Vector<String> list;
857 string.split('\n', true, list); // true gets us empty strings in the list
858 size_t numLines = list.size();
859 for (size_t i = 0; i < numLines; ++i) {
860 const String& s = list[i];
861
862 RefPtr<Element> element;
863 if (s.isEmpty() && i + 1 == numLines) {
864 // For last line, use the "magic BR" rather than a P.
865 element = createBreakElement(document);
866 element->setAttribute(classAttr, AppleInterchangeNewline);
867 } else if (useLineBreak) {
868 element = createBreakElement(document);
869 fillContainerFromString(fragment.get(), s);
870 } else {
871 if (useClonesOfEnclosingBlock)
872 element = block->cloneElementWithoutChildren();
873 else
874 element = createDefaultParagraphElement(document);
875 fillContainerFromString(element.get(), s);
876 }
877 fragment->appendChild(element.release());
878 }
879 return fragment.release();
880 }
881
createFragmentFromNodes(Document * document,const Vector<Node * > & nodes)882 PassRefPtr<DocumentFragment> createFragmentFromNodes(Document *document, const Vector<Node*>& nodes)
883 {
884 if (!document)
885 return 0;
886
887 RefPtr<DocumentFragment> fragment = document->createDocumentFragment();
888
889 size_t size = nodes.size();
890 for (size_t i = 0; i < size; ++i) {
891 RefPtr<Element> element = createDefaultParagraphElement(*document);
892 element->appendChild(nodes[i]);
893 fragment->appendChild(element.release());
894 }
895
896 return fragment.release();
897 }
898
createFullMarkup(const Node * node)899 String createFullMarkup(const Node* node)
900 {
901 if (!node)
902 return String();
903
904 Frame* frame = node->document().frame();
905 if (!frame)
906 return String();
907
908 // FIXME: This is never "for interchange". Is that right?
909 String markupString = createMarkup(node, IncludeNode, 0);
910 Node::NodeType nodeType = node->nodeType();
911 if (nodeType != Node::DOCUMENT_NODE && nodeType != Node::DOCUMENT_TYPE_NODE)
912 markupString = frame->documentTypeString() + markupString;
913
914 return markupString;
915 }
916
createFullMarkup(const Range * range)917 String createFullMarkup(const Range* range)
918 {
919 if (!range)
920 return String();
921
922 Node* node = range->startContainer();
923 if (!node)
924 return String();
925
926 Frame* frame = node->document().frame();
927 if (!frame)
928 return String();
929
930 // FIXME: This is always "for interchange". Is that right? See the previous method.
931 return frame->documentTypeString() + createMarkup(range, 0, AnnotateForInterchange);
932 }
933
urlToMarkup(const KURL & url,const String & title)934 String urlToMarkup(const KURL& url, const String& title)
935 {
936 StringBuilder markup;
937 markup.append("<a href=\"");
938 markup.append(url.string());
939 markup.append("\">");
940 MarkupAccumulator::appendCharactersReplacingEntities(markup, title, 0, title.length(), EntityMaskInPCDATA);
941 markup.append("</a>");
942 return markup.toString();
943 }
944
createFragmentForInnerOuterHTML(const String & markup,Element * contextElement,ParserContentPolicy parserContentPolicy,const char * method,ExceptionState & exceptionState)945 PassRefPtr<DocumentFragment> createFragmentForInnerOuterHTML(const String& markup, Element* contextElement, ParserContentPolicy parserContentPolicy, const char* method, ExceptionState& exceptionState)
946 {
947 Document& document = contextElement->hasTagName(templateTag) ? contextElement->document().ensureTemplateDocument() : contextElement->document();
948 RefPtr<DocumentFragment> fragment = DocumentFragment::create(document);
949
950 if (document.isHTMLDocument()) {
951 fragment->parseHTML(markup, contextElement, parserContentPolicy);
952 return fragment;
953 }
954
955 bool wasValid = fragment->parseXML(markup, contextElement, parserContentPolicy);
956 if (!wasValid) {
957 exceptionState.throwDOMException(SyntaxError, "The provided markup is invalid XML, and therefore cannot be inserted into an XML document.");
958 return 0;
959 }
960 return fragment.release();
961 }
962
createFragmentForTransformToFragment(const String & sourceString,const String & sourceMIMEType,Document & outputDoc)963 PassRefPtr<DocumentFragment> createFragmentForTransformToFragment(const String& sourceString, const String& sourceMIMEType, Document& outputDoc)
964 {
965 RefPtr<DocumentFragment> fragment = outputDoc.createDocumentFragment();
966
967 if (sourceMIMEType == "text/html") {
968 // As far as I can tell, there isn't a spec for how transformToFragment is supposed to work.
969 // Based on the documentation I can find, it looks like we want to start parsing the fragment in the InBody insertion mode.
970 // Unfortunately, that's an implementation detail of the parser.
971 // We achieve that effect here by passing in a fake body element as context for the fragment.
972 RefPtr<HTMLBodyElement> fakeBody = HTMLBodyElement::create(outputDoc);
973 fragment->parseHTML(sourceString, fakeBody.get());
974 } else if (sourceMIMEType == "text/plain") {
975 fragment->parserAppendChild(Text::create(outputDoc, sourceString));
976 } else {
977 bool successfulParse = fragment->parseXML(sourceString, 0);
978 if (!successfulParse)
979 return 0;
980 }
981
982 // FIXME: Do we need to mess with URLs here?
983
984 return fragment.release();
985 }
986
removeElementPreservingChildren(PassRefPtr<DocumentFragment> fragment,HTMLElement * element)987 static inline void removeElementPreservingChildren(PassRefPtr<DocumentFragment> fragment, HTMLElement* element)
988 {
989 RefPtr<Node> nextChild;
990 for (RefPtr<Node> child = element->firstChild(); child; child = nextChild) {
991 nextChild = child->nextSibling();
992 element->removeChild(child.get());
993 fragment->insertBefore(child, element);
994 }
995 fragment->removeChild(element);
996 }
997
createContextualFragment(const String & markup,HTMLElement * element,ParserContentPolicy parserContentPolicy,ExceptionState & exceptionState)998 PassRefPtr<DocumentFragment> createContextualFragment(const String& markup, HTMLElement* element, ParserContentPolicy parserContentPolicy, ExceptionState& exceptionState)
999 {
1000 ASSERT(element);
1001 if (element->ieForbidsInsertHTML() || element->hasLocalName(colTag) || element->hasLocalName(colgroupTag) || element->hasLocalName(framesetTag)
1002 || element->hasLocalName(headTag) || element->hasLocalName(styleTag) || element->hasLocalName(titleTag)) {
1003 exceptionState.throwDOMException(NotSupportedError, "The range's container is '" + element->localName() + "', which is not supported.");
1004 return 0;
1005 }
1006
1007 RefPtr<DocumentFragment> fragment = createFragmentForInnerOuterHTML(markup, element, parserContentPolicy, "createContextualFragment", exceptionState);
1008 if (!fragment)
1009 return 0;
1010
1011 // We need to pop <html> and <body> elements and remove <head> to
1012 // accommodate folks passing complete HTML documents to make the
1013 // child of an element.
1014
1015 RefPtr<Node> nextNode;
1016 for (RefPtr<Node> node = fragment->firstChild(); node; node = nextNode) {
1017 nextNode = node->nextSibling();
1018 if (isHTMLHtmlElement(node.get()) || node->hasTagName(headTag) || node->hasTagName(bodyTag)) {
1019 HTMLElement* element = toHTMLElement(node);
1020 if (Node* firstChild = element->firstChild())
1021 nextNode = firstChild;
1022 removeElementPreservingChildren(fragment, element);
1023 }
1024 }
1025 return fragment.release();
1026 }
1027
replaceChildrenWithFragment(ContainerNode * container,PassRefPtr<DocumentFragment> fragment,ExceptionState & exceptionState)1028 void replaceChildrenWithFragment(ContainerNode* container, PassRefPtr<DocumentFragment> fragment, ExceptionState& exceptionState)
1029 {
1030 ASSERT(container);
1031 RefPtr<ContainerNode> containerNode(container);
1032
1033 ChildListMutationScope mutation(*containerNode);
1034
1035 if (!fragment->firstChild()) {
1036 containerNode->removeChildren();
1037 return;
1038 }
1039
1040 if (containerNode->hasOneTextChild() && fragment->hasOneTextChild()) {
1041 toText(containerNode->firstChild())->setData(toText(fragment->firstChild())->data());
1042 return;
1043 }
1044
1045 if (containerNode->hasOneChild()) {
1046 containerNode->replaceChild(fragment, containerNode->firstChild(), exceptionState);
1047 return;
1048 }
1049
1050 containerNode->removeChildren();
1051 containerNode->appendChild(fragment, exceptionState);
1052 }
1053
replaceChildrenWithText(ContainerNode * container,const String & text,ExceptionState & exceptionState)1054 void replaceChildrenWithText(ContainerNode* container, const String& text, ExceptionState& exceptionState)
1055 {
1056 ASSERT(container);
1057 RefPtr<ContainerNode> containerNode(container);
1058
1059 ChildListMutationScope mutation(*containerNode);
1060
1061 if (containerNode->hasOneTextChild()) {
1062 toText(containerNode->firstChild())->setData(text);
1063 return;
1064 }
1065
1066 RefPtr<Text> textNode = Text::create(containerNode->document(), text);
1067
1068 if (containerNode->hasOneChild()) {
1069 containerNode->replaceChild(textNode.release(), containerNode->firstChild(), exceptionState);
1070 return;
1071 }
1072
1073 containerNode->removeChildren();
1074 containerNode->appendChild(textNode.release(), exceptionState);
1075 }
1076
mergeWithNextTextNode(PassRefPtr<Node> node,ExceptionState & exceptionState)1077 void mergeWithNextTextNode(PassRefPtr<Node> node, ExceptionState& exceptionState)
1078 {
1079 ASSERT(node && node->isTextNode());
1080 Node* next = node->nextSibling();
1081 if (!next || !next->isTextNode())
1082 return;
1083
1084 RefPtr<Text> textNode = toText(node.get());
1085 RefPtr<Text> textNext = toText(next);
1086 textNode->appendData(textNext->data());
1087 if (textNext->parentNode()) // Might have been removed by mutation event.
1088 textNext->remove(exceptionState);
1089 }
1090
1091 }
1092