1 /*
2 * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
3 * Copyright (C) 2009, 2010, 2011 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28 #include "core/editing/ReplaceSelectionCommand.h"
29
30 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
31 #include "core/CSSPropertyNames.h"
32 #include "core/HTMLNames.h"
33 #include "core/InputTypeNames.h"
34 #include "core/css/CSSStyleDeclaration.h"
35 #include "core/css/StylePropertySet.h"
36 #include "core/dom/Document.h"
37 #include "core/dom/DocumentFragment.h"
38 #include "core/dom/Element.h"
39 #include "core/dom/Text.h"
40 #include "core/editing/ApplyStyleCommand.h"
41 #include "core/editing/BreakBlockquoteCommand.h"
42 #include "core/editing/FrameSelection.h"
43 #include "core/editing/HTMLInterchange.h"
44 #include "core/editing/SimplifyMarkupCommand.h"
45 #include "core/editing/SmartReplace.h"
46 #include "core/editing/TextIterator.h"
47 #include "core/editing/VisibleUnits.h"
48 #include "core/editing/htmlediting.h"
49 #include "core/editing/markup.h"
50 #include "core/events/BeforeTextInsertedEvent.h"
51 #include "core/frame/LocalFrame.h"
52 #include "core/frame/UseCounter.h"
53 #include "core/html/HTMLBRElement.h"
54 #include "core/html/HTMLElement.h"
55 #include "core/html/HTMLInputElement.h"
56 #include "core/html/HTMLLIElement.h"
57 #include "core/html/HTMLQuoteElement.h"
58 #include "core/html/HTMLSelectElement.h"
59 #include "core/html/HTMLSpanElement.h"
60 #include "core/rendering/RenderObject.h"
61 #include "core/rendering/RenderText.h"
62 #include "wtf/StdLibExtras.h"
63 #include "wtf/Vector.h"
64
65 namespace blink {
66
67 using namespace HTMLNames;
68
69 enum EFragmentType { EmptyFragment, SingleTextNodeFragment, TreeFragment };
70
71 // --- ReplacementFragment helper class
72
73 class ReplacementFragment FINAL {
74 WTF_MAKE_NONCOPYABLE(ReplacementFragment);
75 STACK_ALLOCATED();
76 public:
77 ReplacementFragment(Document*, DocumentFragment*, const VisibleSelection&);
78
79 Node* firstChild() const;
80 Node* lastChild() const;
81
82 bool isEmpty() const;
83
hasInterchangeNewlineAtStart() const84 bool hasInterchangeNewlineAtStart() const { return m_hasInterchangeNewlineAtStart; }
hasInterchangeNewlineAtEnd() const85 bool hasInterchangeNewlineAtEnd() const { return m_hasInterchangeNewlineAtEnd; }
86
87 void removeNode(PassRefPtrWillBeRawPtr<Node>);
88 void removeNodePreservingChildren(PassRefPtrWillBeRawPtr<ContainerNode>);
89
90 private:
91 PassRefPtrWillBeRawPtr<HTMLElement> insertFragmentForTestRendering(Element* rootEditableElement);
92 void removeUnrenderedNodes(ContainerNode*);
93 void restoreAndRemoveTestRenderingNodesToFragment(Element*);
94 void removeInterchangeNodes(ContainerNode*);
95
96 void insertNodeBefore(PassRefPtrWillBeRawPtr<Node>, Node* refNode);
97
98 RefPtrWillBeMember<Document> m_document;
99 RefPtrWillBeMember<DocumentFragment> m_fragment;
100 bool m_hasInterchangeNewlineAtStart;
101 bool m_hasInterchangeNewlineAtEnd;
102 };
103
isInterchangeHTMLBRElement(const Node * node)104 static bool isInterchangeHTMLBRElement(const Node* node)
105 {
106 DEFINE_STATIC_LOCAL(String, interchangeNewlineClassString, (AppleInterchangeNewline));
107 if (!isHTMLBRElement(node) || toHTMLBRElement(node)->getAttribute(classAttr) != interchangeNewlineClassString)
108 return false;
109 UseCounter::count(node->document(), UseCounter::EditingAppleInterchangeNewline);
110 return true;
111 }
112
isHTMLInterchangeConvertedSpaceSpan(const Node * node)113 static bool isHTMLInterchangeConvertedSpaceSpan(const Node* node)
114 {
115 DEFINE_STATIC_LOCAL(String, convertedSpaceSpanClassString, (AppleConvertedSpace));
116 if (!node->isHTMLElement() || toHTMLElement(node)->getAttribute(classAttr) != convertedSpaceSpanClassString)
117 return false;
118 UseCounter::count(node->document(), UseCounter::EditingAppleConvertedSpace);
119 return true;
120 }
121
positionAvoidingPrecedingNodes(Position pos)122 static Position positionAvoidingPrecedingNodes(Position pos)
123 {
124 // If we're already on a break, it's probably a placeholder and we shouldn't change our position.
125 if (editingIgnoresContent(pos.deprecatedNode()))
126 return pos;
127
128 // We also stop when changing block flow elements because even though the visual position is the
129 // same. E.g.,
130 // <div>foo^</div>^
131 // The two positions above are the same visual position, but we want to stay in the same block.
132 Element* enclosingBlockElement = enclosingBlock(pos.containerNode());
133 for (Position nextPosition = pos; nextPosition.containerNode() != enclosingBlockElement; pos = nextPosition) {
134 if (lineBreakExistsAtPosition(pos))
135 break;
136
137 if (pos.containerNode()->nonShadowBoundaryParentNode())
138 nextPosition = positionInParentAfterNode(*pos.containerNode());
139
140 if (nextPosition == pos
141 || enclosingBlock(nextPosition.containerNode()) != enclosingBlockElement
142 || VisiblePosition(pos) != VisiblePosition(nextPosition))
143 break;
144 }
145 return pos;
146 }
147
ReplacementFragment(Document * document,DocumentFragment * fragment,const VisibleSelection & selection)148 ReplacementFragment::ReplacementFragment(Document* document, DocumentFragment* fragment, const VisibleSelection& selection)
149 : m_document(document),
150 m_fragment(fragment),
151 m_hasInterchangeNewlineAtStart(false),
152 m_hasInterchangeNewlineAtEnd(false)
153 {
154 if (!m_document)
155 return;
156 if (!m_fragment || !m_fragment->hasChildren())
157 return;
158
159 RefPtrWillBeRawPtr<Element> editableRoot = selection.rootEditableElement();
160 ASSERT(editableRoot);
161 if (!editableRoot)
162 return;
163
164 Element* shadowAncestorElement;
165 if (editableRoot->isInShadowTree())
166 shadowAncestorElement = editableRoot->shadowHost();
167 else
168 shadowAncestorElement = editableRoot.get();
169
170 if (!editableRoot->getAttributeEventListener(EventTypeNames::webkitBeforeTextInserted)
171 // FIXME: Remove these checks once textareas and textfields actually register an event handler.
172 && !(shadowAncestorElement && shadowAncestorElement->renderer() && shadowAncestorElement->renderer()->isTextControl())
173 && editableRoot->rendererIsRichlyEditable()) {
174 removeInterchangeNodes(m_fragment.get());
175 return;
176 }
177
178 RefPtrWillBeRawPtr<HTMLElement> holder = insertFragmentForTestRendering(editableRoot.get());
179 if (!holder) {
180 removeInterchangeNodes(m_fragment.get());
181 return;
182 }
183
184 RefPtrWillBeRawPtr<Range> range = VisibleSelection::selectionFromContentsOfNode(holder.get()).toNormalizedRange();
185 String text = plainText(range.get(), static_cast<TextIteratorBehavior>(TextIteratorEmitsOriginalText | TextIteratorIgnoresStyleVisibility));
186
187 removeInterchangeNodes(holder.get());
188 removeUnrenderedNodes(holder.get());
189 restoreAndRemoveTestRenderingNodesToFragment(holder.get());
190
191 // Give the root a chance to change the text.
192 RefPtrWillBeRawPtr<BeforeTextInsertedEvent> evt = BeforeTextInsertedEvent::create(text);
193 editableRoot->dispatchEvent(evt, ASSERT_NO_EXCEPTION);
194 if (text != evt->text() || !editableRoot->rendererIsRichlyEditable()) {
195 restoreAndRemoveTestRenderingNodesToFragment(holder.get());
196
197 m_fragment = createFragmentFromText(selection.toNormalizedRange().get(), evt->text());
198 if (!m_fragment->hasChildren())
199 return;
200
201 holder = insertFragmentForTestRendering(editableRoot.get());
202 removeInterchangeNodes(holder.get());
203 removeUnrenderedNodes(holder.get());
204 restoreAndRemoveTestRenderingNodesToFragment(holder.get());
205 }
206 }
207
isEmpty() const208 bool ReplacementFragment::isEmpty() const
209 {
210 return (!m_fragment || !m_fragment->hasChildren()) && !m_hasInterchangeNewlineAtStart && !m_hasInterchangeNewlineAtEnd;
211 }
212
firstChild() const213 Node* ReplacementFragment::firstChild() const
214 {
215 return m_fragment ? m_fragment->firstChild() : 0;
216 }
217
lastChild() const218 Node* ReplacementFragment::lastChild() const
219 {
220 return m_fragment ? m_fragment->lastChild() : 0;
221 }
222
removeNodePreservingChildren(PassRefPtrWillBeRawPtr<ContainerNode> node)223 void ReplacementFragment::removeNodePreservingChildren(PassRefPtrWillBeRawPtr<ContainerNode> node)
224 {
225 if (!node)
226 return;
227
228 while (RefPtrWillBeRawPtr<Node> n = node->firstChild()) {
229 removeNode(n);
230 insertNodeBefore(n.release(), node.get());
231 }
232 removeNode(node);
233 }
234
removeNode(PassRefPtrWillBeRawPtr<Node> node)235 void ReplacementFragment::removeNode(PassRefPtrWillBeRawPtr<Node> node)
236 {
237 if (!node)
238 return;
239
240 ContainerNode* parent = node->nonShadowBoundaryParentNode();
241 if (!parent)
242 return;
243
244 parent->removeChild(node.get());
245 }
246
insertNodeBefore(PassRefPtrWillBeRawPtr<Node> node,Node * refNode)247 void ReplacementFragment::insertNodeBefore(PassRefPtrWillBeRawPtr<Node> node, Node* refNode)
248 {
249 if (!node || !refNode)
250 return;
251
252 ContainerNode* parent = refNode->nonShadowBoundaryParentNode();
253 if (!parent)
254 return;
255
256 parent->insertBefore(node, refNode);
257 }
258
insertFragmentForTestRendering(Element * rootEditableElement)259 PassRefPtrWillBeRawPtr<HTMLElement> ReplacementFragment::insertFragmentForTestRendering(Element* rootEditableElement)
260 {
261 ASSERT(m_document);
262 RefPtrWillBeRawPtr<HTMLElement> holder = createDefaultParagraphElement(*m_document.get());
263
264 holder->appendChild(m_fragment);
265 rootEditableElement->appendChild(holder.get());
266 m_document->updateLayoutIgnorePendingStylesheets();
267
268 return holder.release();
269 }
270
restoreAndRemoveTestRenderingNodesToFragment(Element * holder)271 void ReplacementFragment::restoreAndRemoveTestRenderingNodesToFragment(Element* holder)
272 {
273 if (!holder)
274 return;
275
276 while (RefPtrWillBeRawPtr<Node> node = holder->firstChild()) {
277 holder->removeChild(node.get());
278 m_fragment->appendChild(node.get());
279 }
280
281 removeNode(holder);
282 }
283
removeUnrenderedNodes(ContainerNode * holder)284 void ReplacementFragment::removeUnrenderedNodes(ContainerNode* holder)
285 {
286 WillBeHeapVector<RefPtrWillBeMember<Node> > unrendered;
287
288 for (Node* node = holder->firstChild(); node; node = NodeTraversal::next(*node, holder))
289 if (!isNodeRendered(node) && !isTableStructureNode(node))
290 unrendered.append(node);
291
292 size_t n = unrendered.size();
293 for (size_t i = 0; i < n; ++i)
294 removeNode(unrendered[i]);
295 }
296
removeInterchangeNodes(ContainerNode * container)297 void ReplacementFragment::removeInterchangeNodes(ContainerNode* container)
298 {
299 m_hasInterchangeNewlineAtStart = false;
300 m_hasInterchangeNewlineAtEnd = false;
301
302 // Interchange newlines at the "start" of the incoming fragment must be
303 // either the first node in the fragment or the first leaf in the fragment.
304 Node* node = container->firstChild();
305 while (node) {
306 if (isInterchangeHTMLBRElement(node)) {
307 m_hasInterchangeNewlineAtStart = true;
308 removeNode(node);
309 break;
310 }
311 node = node->firstChild();
312 }
313 if (!container->hasChildren())
314 return;
315 // Interchange newlines at the "end" of the incoming fragment must be
316 // either the last node in the fragment or the last leaf in the fragment.
317 node = container->lastChild();
318 while (node) {
319 if (isInterchangeHTMLBRElement(node)) {
320 m_hasInterchangeNewlineAtEnd = true;
321 removeNode(node);
322 break;
323 }
324 node = node->lastChild();
325 }
326
327 node = container->firstChild();
328 while (node) {
329 RefPtrWillBeRawPtr<Node> next = NodeTraversal::next(*node);
330 if (isHTMLInterchangeConvertedSpaceSpan(node)) {
331 HTMLElement& element = toHTMLElement(*node);
332 next = NodeTraversal::nextSkippingChildren(element);
333 removeNodePreservingChildren(&element);
334 }
335 node = next.get();
336 }
337 }
338
respondToNodeInsertion(Node & node)339 inline void ReplaceSelectionCommand::InsertedNodes::respondToNodeInsertion(Node& node)
340 {
341 if (!m_firstNodeInserted)
342 m_firstNodeInserted = &node;
343
344 m_lastNodeInserted = &node;
345 }
346
willRemoveNodePreservingChildren(Node & node)347 inline void ReplaceSelectionCommand::InsertedNodes::willRemoveNodePreservingChildren(Node& node)
348 {
349 if (m_firstNodeInserted.get() == node)
350 m_firstNodeInserted = NodeTraversal::next(node);
351 if (m_lastNodeInserted.get() == node)
352 m_lastNodeInserted = node.lastChild() ? node.lastChild() : NodeTraversal::nextSkippingChildren(node);
353 }
354
willRemoveNode(Node & node)355 inline void ReplaceSelectionCommand::InsertedNodes::willRemoveNode(Node& node)
356 {
357 if (m_firstNodeInserted.get() == node && m_lastNodeInserted.get() == node) {
358 m_firstNodeInserted = nullptr;
359 m_lastNodeInserted = nullptr;
360 } else if (m_firstNodeInserted.get() == node) {
361 m_firstNodeInserted = NodeTraversal::nextSkippingChildren(*m_firstNodeInserted);
362 } else if (m_lastNodeInserted.get() == node) {
363 m_lastNodeInserted = NodeTraversal::previousSkippingChildren(*m_lastNodeInserted);
364 }
365 }
366
didReplaceNode(Node & node,Node & newNode)367 inline void ReplaceSelectionCommand::InsertedNodes::didReplaceNode(Node& node, Node& newNode)
368 {
369 if (m_firstNodeInserted.get() == node)
370 m_firstNodeInserted = &newNode;
371 if (m_lastNodeInserted.get() == node)
372 m_lastNodeInserted = &newNode;
373 }
374
ReplaceSelectionCommand(Document & document,PassRefPtrWillBeRawPtr<DocumentFragment> fragment,CommandOptions options,EditAction editAction)375 ReplaceSelectionCommand::ReplaceSelectionCommand(Document& document, PassRefPtrWillBeRawPtr<DocumentFragment> fragment, CommandOptions options, EditAction editAction)
376 : CompositeEditCommand(document)
377 , m_selectReplacement(options & SelectReplacement)
378 , m_smartReplace(options & SmartReplace)
379 , m_matchStyle(options & MatchStyle)
380 , m_documentFragment(fragment)
381 , m_preventNesting(options & PreventNesting)
382 , m_movingParagraph(options & MovingParagraph)
383 , m_editAction(editAction)
384 , m_sanitizeFragment(options & SanitizeFragment)
385 , m_shouldMergeEnd(false)
386 {
387 }
388
hasMatchingQuoteLevel(VisiblePosition endOfExistingContent,VisiblePosition endOfInsertedContent)389 static bool hasMatchingQuoteLevel(VisiblePosition endOfExistingContent, VisiblePosition endOfInsertedContent)
390 {
391 Position existing = endOfExistingContent.deepEquivalent();
392 Position inserted = endOfInsertedContent.deepEquivalent();
393 bool isInsideMailBlockquote = enclosingNodeOfType(inserted, isMailHTMLBlockquoteElement, CanCrossEditingBoundary);
394 return isInsideMailBlockquote && (numEnclosingMailBlockquotes(existing) == numEnclosingMailBlockquotes(inserted));
395 }
396
shouldMergeStart(bool selectionStartWasStartOfParagraph,bool fragmentHasInterchangeNewlineAtStart,bool selectionStartWasInsideMailBlockquote)397 bool ReplaceSelectionCommand::shouldMergeStart(bool selectionStartWasStartOfParagraph, bool fragmentHasInterchangeNewlineAtStart, bool selectionStartWasInsideMailBlockquote)
398 {
399 if (m_movingParagraph)
400 return false;
401
402 VisiblePosition startOfInsertedContent(positionAtStartOfInsertedContent());
403 VisiblePosition prev = startOfInsertedContent.previous(CannotCrossEditingBoundary);
404 if (prev.isNull())
405 return false;
406
407 // When we have matching quote levels, its ok to merge more frequently.
408 // For a successful merge, we still need to make sure that the inserted content starts with the beginning of a paragraph.
409 // And we should only merge here if the selection start was inside a mail blockquote. This prevents against removing a
410 // blockquote from newly pasted quoted content that was pasted into an unquoted position. If that unquoted position happens
411 // to be right after another blockquote, we don't want to merge and risk stripping a valid block (and newline) from the pasted content.
412 if (isStartOfParagraph(startOfInsertedContent) && selectionStartWasInsideMailBlockquote && hasMatchingQuoteLevel(prev, positionAtEndOfInsertedContent()))
413 return true;
414
415 return !selectionStartWasStartOfParagraph
416 && !fragmentHasInterchangeNewlineAtStart
417 && isStartOfParagraph(startOfInsertedContent)
418 && !isHTMLBRElement(*startOfInsertedContent.deepEquivalent().deprecatedNode())
419 && shouldMerge(startOfInsertedContent, prev);
420 }
421
shouldMergeEnd(bool selectionEndWasEndOfParagraph)422 bool ReplaceSelectionCommand::shouldMergeEnd(bool selectionEndWasEndOfParagraph)
423 {
424 VisiblePosition endOfInsertedContent(positionAtEndOfInsertedContent());
425 VisiblePosition next = endOfInsertedContent.next(CannotCrossEditingBoundary);
426 if (next.isNull())
427 return false;
428
429 return !selectionEndWasEndOfParagraph
430 && isEndOfParagraph(endOfInsertedContent)
431 && !isHTMLBRElement(*endOfInsertedContent.deepEquivalent().deprecatedNode())
432 && shouldMerge(endOfInsertedContent, next);
433 }
434
isMailPasteAsQuotationHTMLBlockQuoteElement(const Node * node)435 static bool isMailPasteAsQuotationHTMLBlockQuoteElement(const Node* node)
436 {
437 if (!node || !node->isHTMLElement())
438 return false;
439 const HTMLElement& element = toHTMLElement(*node);
440 if (!element.hasTagName(blockquoteTag) || element.getAttribute(classAttr) != ApplePasteAsQuotation)
441 return false;
442 UseCounter::count(node->document(), UseCounter::EditingApplePasteAsQuotation);
443 return true;
444 }
445
isHTMLHeaderElement(const Node * a)446 static bool isHTMLHeaderElement(const Node* a)
447 {
448 if (!a || !a->isHTMLElement())
449 return false;
450
451 const HTMLElement& element = toHTMLElement(*a);
452 return element.hasTagName(h1Tag)
453 || element.hasTagName(h2Tag)
454 || element.hasTagName(h3Tag)
455 || element.hasTagName(h4Tag)
456 || element.hasTagName(h5Tag)
457 || element.hasTagName(h6Tag);
458 }
459
haveSameTagName(Element * a,Element * b)460 static bool haveSameTagName(Element* a, Element* b)
461 {
462 return a && b && a->tagName() == b->tagName();
463 }
464
shouldMerge(const VisiblePosition & source,const VisiblePosition & destination)465 bool ReplaceSelectionCommand::shouldMerge(const VisiblePosition& source, const VisiblePosition& destination)
466 {
467 if (source.isNull() || destination.isNull())
468 return false;
469
470 Node* sourceNode = source.deepEquivalent().deprecatedNode();
471 Node* destinationNode = destination.deepEquivalent().deprecatedNode();
472 Element* sourceBlock = enclosingBlock(sourceNode);
473 Element* destinationBlock = enclosingBlock(destinationNode);
474 return !enclosingNodeOfType(source.deepEquivalent(), &isMailPasteAsQuotationHTMLBlockQuoteElement)
475 && sourceBlock && (!sourceBlock->hasTagName(blockquoteTag) || isMailHTMLBlockquoteElement(sourceBlock))
476 && enclosingListChild(sourceBlock) == enclosingListChild(destinationNode)
477 && enclosingTableCell(source.deepEquivalent()) == enclosingTableCell(destination.deepEquivalent())
478 && (!isHTMLHeaderElement(sourceBlock) || haveSameTagName(sourceBlock, destinationBlock))
479 // Don't merge to or from a position before or after a block because it would
480 // be a no-op and cause infinite recursion.
481 && !isBlock(sourceNode) && !isBlock(destinationNode);
482 }
483
484 // Style rules that match just inserted elements could change their appearance, like
485 // a div inserted into a document with div { display:inline; }.
removeRedundantStylesAndKeepStyleSpanInline(InsertedNodes & insertedNodes)486 void ReplaceSelectionCommand::removeRedundantStylesAndKeepStyleSpanInline(InsertedNodes& insertedNodes)
487 {
488 RefPtrWillBeRawPtr<Node> pastEndNode = insertedNodes.pastLastLeaf();
489 RefPtrWillBeRawPtr<Node> next = nullptr;
490 for (RefPtrWillBeRawPtr<Node> node = insertedNodes.firstNodeInserted(); node && node != pastEndNode; node = next) {
491 // FIXME: <rdar://problem/5371536> Style rules that match pasted content can change it's appearance
492
493 next = NodeTraversal::next(*node);
494 if (!node->isStyledElement())
495 continue;
496
497 Element* element = toElement(node);
498
499 const StylePropertySet* inlineStyle = element->inlineStyle();
500 RefPtrWillBeRawPtr<EditingStyle> newInlineStyle = EditingStyle::create(inlineStyle);
501 if (inlineStyle) {
502 if (element->isHTMLElement()) {
503 Vector<QualifiedName> attributes;
504 HTMLElement* htmlElement = toHTMLElement(element);
505 ASSERT(htmlElement);
506
507 if (newInlineStyle->conflictsWithImplicitStyleOfElement(htmlElement)) {
508 // e.g. <b style="font-weight: normal;"> is converted to <span style="font-weight: normal;">
509 element = replaceElementWithSpanPreservingChildrenAndAttributes(htmlElement);
510 inlineStyle = element->inlineStyle();
511 insertedNodes.didReplaceNode(*htmlElement, *element);
512 } else if (newInlineStyle->extractConflictingImplicitStyleOfAttributes(htmlElement, EditingStyle::PreserveWritingDirection, 0, attributes,
513 EditingStyle::DoNotExtractMatchingStyle)) {
514 // e.g. <font size="3" style="font-size: 20px;"> is converted to <font style="font-size: 20px;">
515 for (size_t i = 0; i < attributes.size(); i++)
516 removeElementAttribute(htmlElement, attributes[i]);
517 }
518 }
519
520 ContainerNode* context = element->parentNode();
521
522 // If Mail wraps the fragment with a Paste as Quotation blockquote, or if you're pasting into a quoted region,
523 // styles from blockquoteNode are allowed to override those from the source document, see <rdar://problem/4930986> and <rdar://problem/5089327>.
524 HTMLQuoteElement* blockquoteElement = !context || isMailPasteAsQuotationHTMLBlockQuoteElement(context) ?
525 toHTMLQuoteElement(context) :
526 toHTMLQuoteElement(enclosingNodeOfType(firstPositionInNode(context), isMailHTMLBlockquoteElement, CanCrossEditingBoundary));
527 if (blockquoteElement)
528 newInlineStyle->removeStyleFromRulesAndContext(element, document().documentElement());
529
530 newInlineStyle->removeStyleFromRulesAndContext(element, context);
531 }
532
533 if (!inlineStyle || newInlineStyle->isEmpty()) {
534 if (isStyleSpanOrSpanWithOnlyStyleAttribute(element) || isEmptyFontTag(element, AllowNonEmptyStyleAttribute)) {
535 insertedNodes.willRemoveNodePreservingChildren(*element);
536 removeNodePreservingChildren(element);
537 continue;
538 }
539 removeElementAttribute(element, styleAttr);
540 } else if (newInlineStyle->style()->propertyCount() != inlineStyle->propertyCount()) {
541 setNodeAttribute(element, styleAttr, AtomicString(newInlineStyle->style()->asText()));
542 }
543
544 // FIXME: Tolerate differences in id, class, and style attributes.
545 if (element->parentNode() && isNonTableCellHTMLBlockElement(element) && areIdenticalElements(element, element->parentNode())
546 && VisiblePosition(firstPositionInNode(element->parentNode())) == VisiblePosition(firstPositionInNode(element))
547 && VisiblePosition(lastPositionInNode(element->parentNode())) == VisiblePosition(lastPositionInNode(element))) {
548 insertedNodes.willRemoveNodePreservingChildren(*element);
549 removeNodePreservingChildren(element);
550 continue;
551 }
552
553 if (element->parentNode() && element->parentNode()->rendererIsRichlyEditable())
554 removeElementAttribute(element, contenteditableAttr);
555
556 // WebKit used to not add display: inline and float: none on copy.
557 // Keep this code around for backward compatibility
558 if (isLegacyAppleHTMLSpanElement(element)) {
559 if (!element->hasChildren()) {
560 insertedNodes.willRemoveNodePreservingChildren(*element);
561 removeNodePreservingChildren(element);
562 continue;
563 }
564 // There are other styles that style rules can give to style spans,
565 // but these are the two important ones because they'll prevent
566 // inserted content from appearing in the right paragraph.
567 // FIXME: Hyatt is concerned that selectively using display:inline will give inconsistent
568 // results. We already know one issue because td elements ignore their display property
569 // in quirks mode (which Mail.app is always in). We should look for an alternative.
570
571 // Mutate using the CSSOM wrapper so we get the same event behavior as a script.
572 if (isBlock(element))
573 element->style()->setPropertyInternal(CSSPropertyDisplay, "inline", false, IGNORE_EXCEPTION);
574 if (element->renderer() && element->renderer()->style()->isFloating())
575 element->style()->setPropertyInternal(CSSPropertyFloat, "none", false, IGNORE_EXCEPTION);
576 }
577 }
578 }
579
isProhibitedParagraphChild(const AtomicString & name)580 static bool isProhibitedParagraphChild(const AtomicString& name)
581 {
582 // https://dvcs.w3.org/hg/editing/raw-file/57abe6d3cb60/editing.html#prohibited-paragraph-child
583 DEFINE_STATIC_LOCAL(HashSet<AtomicString>, elements, ());
584 if (elements.isEmpty()) {
585 elements.add(addressTag.localName());
586 elements.add(articleTag.localName());
587 elements.add(asideTag.localName());
588 elements.add(blockquoteTag.localName());
589 elements.add(captionTag.localName());
590 elements.add(centerTag.localName());
591 elements.add(colTag.localName());
592 elements.add(colgroupTag.localName());
593 elements.add(ddTag.localName());
594 elements.add(detailsTag.localName());
595 elements.add(dirTag.localName());
596 elements.add(divTag.localName());
597 elements.add(dlTag.localName());
598 elements.add(dtTag.localName());
599 elements.add(fieldsetTag.localName());
600 elements.add(figcaptionTag.localName());
601 elements.add(figureTag.localName());
602 elements.add(footerTag.localName());
603 elements.add(formTag.localName());
604 elements.add(h1Tag.localName());
605 elements.add(h2Tag.localName());
606 elements.add(h3Tag.localName());
607 elements.add(h4Tag.localName());
608 elements.add(h5Tag.localName());
609 elements.add(h6Tag.localName());
610 elements.add(headerTag.localName());
611 elements.add(hgroupTag.localName());
612 elements.add(hrTag.localName());
613 elements.add(liTag.localName());
614 elements.add(listingTag.localName());
615 elements.add(mainTag.localName()); // Missing in the specification.
616 elements.add(menuTag.localName());
617 elements.add(navTag.localName());
618 elements.add(olTag.localName());
619 elements.add(pTag.localName());
620 elements.add(plaintextTag.localName());
621 elements.add(preTag.localName());
622 elements.add(sectionTag.localName());
623 elements.add(summaryTag.localName());
624 elements.add(tableTag.localName());
625 elements.add(tbodyTag.localName());
626 elements.add(tdTag.localName());
627 elements.add(tfootTag.localName());
628 elements.add(thTag.localName());
629 elements.add(theadTag.localName());
630 elements.add(trTag.localName());
631 elements.add(ulTag.localName());
632 elements.add(xmpTag.localName());
633 }
634 return elements.contains(name);
635 }
636
makeInsertedContentRoundTrippableWithHTMLTreeBuilder(const InsertedNodes & insertedNodes)637 void ReplaceSelectionCommand::makeInsertedContentRoundTrippableWithHTMLTreeBuilder(const InsertedNodes& insertedNodes)
638 {
639 RefPtrWillBeRawPtr<Node> pastEndNode = insertedNodes.pastLastLeaf();
640 RefPtrWillBeRawPtr<Node> next = nullptr;
641 for (RefPtrWillBeRawPtr<Node> node = insertedNodes.firstNodeInserted(); node && node != pastEndNode; node = next) {
642 next = NodeTraversal::next(*node);
643
644 if (!node->isHTMLElement())
645 continue;
646
647 HTMLElement& element = toHTMLElement(*node);
648 if (isProhibitedParagraphChild(element.localName())) {
649 if (HTMLElement* paragraphElement = toHTMLElement(enclosingElementWithTag(positionInParentBeforeNode(element), pTag)))
650 moveElementOutOfAncestor(&element, paragraphElement);
651 }
652
653 if (isHTMLHeaderElement(&element)) {
654 if (HTMLElement* headerElement = toHTMLElement(highestEnclosingNodeOfType(positionInParentBeforeNode(element), isHTMLHeaderElement)))
655 moveElementOutOfAncestor(&element, headerElement);
656 }
657 }
658 }
659
moveElementOutOfAncestor(PassRefPtrWillBeRawPtr<Element> prpElement,PassRefPtrWillBeRawPtr<ContainerNode> prpAncestor)660 void ReplaceSelectionCommand::moveElementOutOfAncestor(PassRefPtrWillBeRawPtr<Element> prpElement, PassRefPtrWillBeRawPtr<ContainerNode> prpAncestor)
661 {
662 RefPtrWillBeRawPtr<Element> element = prpElement;
663 RefPtrWillBeRawPtr<ContainerNode> ancestor = prpAncestor;
664
665 if (!ancestor->parentNode()->hasEditableStyle())
666 return;
667
668 VisiblePosition positionAtEndOfNode(lastPositionInOrAfterNode(element.get()));
669 VisiblePosition lastPositionInParagraph(lastPositionInNode(ancestor.get()));
670 if (positionAtEndOfNode == lastPositionInParagraph) {
671 removeNode(element);
672 if (ancestor->nextSibling())
673 insertNodeBefore(element, ancestor->nextSibling());
674 else
675 appendNode(element, ancestor->parentNode());
676 } else {
677 RefPtrWillBeRawPtr<Node> nodeToSplitTo = splitTreeToNode(element.get(), ancestor.get(), true);
678 removeNode(element);
679 insertNodeBefore(element, nodeToSplitTo);
680 }
681 if (!ancestor->hasChildren())
682 removeNode(ancestor.release());
683 }
684
nodeHasVisibleRenderText(Text & text)685 static inline bool nodeHasVisibleRenderText(Text& text)
686 {
687 return text.renderer() && text.renderer()->renderedTextLength() > 0;
688 }
689
removeUnrenderedTextNodesAtEnds(InsertedNodes & insertedNodes)690 void ReplaceSelectionCommand::removeUnrenderedTextNodesAtEnds(InsertedNodes& insertedNodes)
691 {
692 document().updateLayoutIgnorePendingStylesheets();
693
694 Node* lastLeafInserted = insertedNodes.lastLeafInserted();
695 if (lastLeafInserted && lastLeafInserted->isTextNode() && !nodeHasVisibleRenderText(toText(*lastLeafInserted))
696 && !enclosingElementWithTag(firstPositionInOrBeforeNode(lastLeafInserted), selectTag)
697 && !enclosingElementWithTag(firstPositionInOrBeforeNode(lastLeafInserted), scriptTag)) {
698 insertedNodes.willRemoveNode(*lastLeafInserted);
699 removeNode(lastLeafInserted);
700 }
701
702 // We don't have to make sure that firstNodeInserted isn't inside a select or script element, because
703 // it is a top level node in the fragment and the user can't insert into those elements.
704 Node* firstNodeInserted = insertedNodes.firstNodeInserted();
705 if (firstNodeInserted && firstNodeInserted->isTextNode() && !nodeHasVisibleRenderText(toText(*firstNodeInserted))) {
706 insertedNodes.willRemoveNode(*firstNodeInserted);
707 removeNode(firstNodeInserted);
708 }
709 }
710
positionAtEndOfInsertedContent() const711 VisiblePosition ReplaceSelectionCommand::positionAtEndOfInsertedContent() const
712 {
713 // FIXME: Why is this hack here? What's special about <select> tags?
714 HTMLSelectElement* enclosingSelect = toHTMLSelectElement(enclosingElementWithTag(m_endOfInsertedContent, selectTag));
715 return VisiblePosition(enclosingSelect ? lastPositionInOrAfterNode(enclosingSelect) : m_endOfInsertedContent);
716 }
717
positionAtStartOfInsertedContent() const718 VisiblePosition ReplaceSelectionCommand::positionAtStartOfInsertedContent() const
719 {
720 return VisiblePosition(m_startOfInsertedContent);
721 }
722
removeHeadContents(ReplacementFragment & fragment)723 static void removeHeadContents(ReplacementFragment& fragment)
724 {
725 Node* next = 0;
726 for (Node* node = fragment.firstChild(); node; node = next) {
727 if (isHTMLBaseElement(*node)
728 || isHTMLLinkElement(*node)
729 || isHTMLMetaElement(*node)
730 || isHTMLStyleElement(*node)
731 || isHTMLTitleElement(*node)) {
732 next = NodeTraversal::nextSkippingChildren(*node);
733 fragment.removeNode(node);
734 } else {
735 next = NodeTraversal::next(*node);
736 }
737 }
738 }
739
740 // Remove style spans before insertion if they are unnecessary. It's faster because we'll
741 // avoid doing a layout.
handleStyleSpansBeforeInsertion(ReplacementFragment & fragment,const Position & insertionPos)742 static bool handleStyleSpansBeforeInsertion(ReplacementFragment& fragment, const Position& insertionPos)
743 {
744 Node* topNode = fragment.firstChild();
745
746 // Handling the case where we are doing Paste as Quotation or pasting into quoted content is more complicated (see handleStyleSpans)
747 // and doesn't receive the optimization.
748 if (isMailPasteAsQuotationHTMLBlockQuoteElement(topNode) || enclosingNodeOfType(firstPositionInOrBeforeNode(topNode), isMailHTMLBlockquoteElement, CanCrossEditingBoundary))
749 return false;
750
751 // Either there are no style spans in the fragment or a WebKit client has added content to the fragment
752 // before inserting it. Look for and handle style spans after insertion.
753 if (!isLegacyAppleHTMLSpanElement(topNode))
754 return false;
755
756 HTMLSpanElement* wrappingStyleSpan = toHTMLSpanElement(topNode);
757 RefPtrWillBeRawPtr<EditingStyle> styleAtInsertionPos = EditingStyle::create(insertionPos.parentAnchoredEquivalent());
758 String styleText = styleAtInsertionPos->style()->asText();
759
760 // FIXME: This string comparison is a naive way of comparing two styles.
761 // We should be taking the diff and check that the diff is empty.
762 if (styleText != wrappingStyleSpan->getAttribute(styleAttr))
763 return false;
764
765 fragment.removeNodePreservingChildren(wrappingStyleSpan);
766 return true;
767 }
768
769 // At copy time, WebKit wraps copied content in a span that contains the source document's
770 // default styles. If the copied Range inherits any other styles from its ancestors, we put
771 // those styles on a second span.
772 // This function removes redundant styles from those spans, and removes the spans if all their
773 // styles are redundant.
774 // We should remove the Apple-style-span class when we're done, see <rdar://problem/5685600>.
775 // We should remove styles from spans that are overridden by all of their children, either here
776 // or at copy time.
handleStyleSpans(InsertedNodes & insertedNodes)777 void ReplaceSelectionCommand::handleStyleSpans(InsertedNodes& insertedNodes)
778 {
779 HTMLSpanElement* wrappingStyleSpan = 0;
780 // The style span that contains the source document's default style should be at
781 // the top of the fragment, but Mail sometimes adds a wrapper (for Paste As Quotation),
782 // so search for the top level style span instead of assuming it's at the top.
783 for (Node* node = insertedNodes.firstNodeInserted(); node; node = NodeTraversal::next(*node)) {
784 if (isLegacyAppleHTMLSpanElement(node)) {
785 wrappingStyleSpan = toHTMLSpanElement(node);
786 break;
787 }
788 }
789
790 // There might not be any style spans if we're pasting from another application or if
791 // we are here because of a document.execCommand("InsertHTML", ...) call.
792 if (!wrappingStyleSpan)
793 return;
794
795 RefPtrWillBeRawPtr<EditingStyle> style = EditingStyle::create(wrappingStyleSpan->inlineStyle());
796 ContainerNode* context = wrappingStyleSpan->parentNode();
797
798 // If Mail wraps the fragment with a Paste as Quotation blockquote, or if you're pasting into a quoted region,
799 // styles from blockquoteElement are allowed to override those from the source document, see <rdar://problem/4930986> and <rdar://problem/5089327>.
800 HTMLQuoteElement* blockquoteElement = isMailPasteAsQuotationHTMLBlockQuoteElement(context) ?
801 toHTMLQuoteElement(context) :
802 toHTMLQuoteElement(enclosingNodeOfType(firstPositionInNode(context), isMailHTMLBlockquoteElement, CanCrossEditingBoundary));
803 if (blockquoteElement)
804 context = document().documentElement();
805
806 // This operation requires that only editing styles to be removed from sourceDocumentStyle.
807 style->prepareToApplyAt(firstPositionInNode(context));
808
809 // Remove block properties in the span's style. This prevents properties that probably have no effect
810 // currently from affecting blocks later if the style is cloned for a new block element during a future
811 // editing operation.
812 // FIXME: They *can* have an effect currently if blocks beneath the style span aren't individually marked
813 // with block styles by the editing engine used to style them. WebKit doesn't do this, but others might.
814 style->removeBlockProperties();
815
816 if (style->isEmpty() || !wrappingStyleSpan->hasChildren()) {
817 insertedNodes.willRemoveNodePreservingChildren(*wrappingStyleSpan);
818 removeNodePreservingChildren(wrappingStyleSpan);
819 } else {
820 setNodeAttribute(wrappingStyleSpan, styleAttr, AtomicString(style->style()->asText()));
821 }
822 }
823
mergeEndIfNeeded()824 void ReplaceSelectionCommand::mergeEndIfNeeded()
825 {
826 if (!m_shouldMergeEnd)
827 return;
828
829 VisiblePosition startOfInsertedContent(positionAtStartOfInsertedContent());
830 VisiblePosition endOfInsertedContent(positionAtEndOfInsertedContent());
831
832 // Bail to avoid infinite recursion.
833 if (m_movingParagraph) {
834 ASSERT_NOT_REACHED();
835 return;
836 }
837
838 // Merging two paragraphs will destroy the moved one's block styles. Always move the end of inserted forward
839 // to preserve the block style of the paragraph already in the document, unless the paragraph to move would
840 // include the what was the start of the selection that was pasted into, so that we preserve that paragraph's
841 // block styles.
842 bool mergeForward = !(inSameParagraph(startOfInsertedContent, endOfInsertedContent) && !isStartOfParagraph(startOfInsertedContent));
843
844 VisiblePosition destination = mergeForward ? endOfInsertedContent.next() : endOfInsertedContent;
845 VisiblePosition startOfParagraphToMove = mergeForward ? startOfParagraph(endOfInsertedContent) : endOfInsertedContent.next();
846
847 // Merging forward could result in deleting the destination anchor node.
848 // To avoid this, we add a placeholder node before the start of the paragraph.
849 if (endOfParagraph(startOfParagraphToMove) == destination) {
850 RefPtrWillBeRawPtr<HTMLBRElement> placeholder = createBreakElement(document());
851 insertNodeBefore(placeholder, startOfParagraphToMove.deepEquivalent().deprecatedNode());
852 destination = VisiblePosition(positionBeforeNode(placeholder.get()));
853 }
854
855 moveParagraph(startOfParagraphToMove, endOfParagraph(startOfParagraphToMove), destination);
856
857 // Merging forward will remove m_endOfInsertedContent from the document.
858 if (mergeForward) {
859 if (m_startOfInsertedContent.isOrphan())
860 m_startOfInsertedContent = endingSelection().visibleStart().deepEquivalent();
861 m_endOfInsertedContent = endingSelection().visibleEnd().deepEquivalent();
862 // If we merged text nodes, m_endOfInsertedContent could be null. If this is the case, we use m_startOfInsertedContent.
863 if (m_endOfInsertedContent.isNull())
864 m_endOfInsertedContent = m_startOfInsertedContent;
865 }
866 }
867
enclosingInline(Node * node)868 static Node* enclosingInline(Node* node)
869 {
870 while (ContainerNode* parent = node->parentNode()) {
871 if (isBlockFlowElement(*parent) || isHTMLBodyElement(*parent))
872 return node;
873 // Stop if any previous sibling is a block.
874 for (Node* sibling = node->previousSibling(); sibling; sibling = sibling->previousSibling()) {
875 if (isBlockFlowElement(*sibling))
876 return node;
877 }
878 node = parent;
879 }
880 return node;
881 }
882
isInlineHTMLElementWithStyle(const Node * node)883 static bool isInlineHTMLElementWithStyle(const Node* node)
884 {
885 // We don't want to skip over any block elements.
886 if (isBlock(node))
887 return false;
888
889 if (!node->isHTMLElement())
890 return false;
891
892 // We can skip over elements whose class attribute is
893 // one of our internal classes.
894 const HTMLElement* element = toHTMLElement(node);
895 const AtomicString& classAttributeValue = element->getAttribute(classAttr);
896 if (classAttributeValue == AppleTabSpanClass) {
897 UseCounter::count(element->document(), UseCounter::EditingAppleTabSpanClass);
898 return true;
899 }
900 if (classAttributeValue == AppleConvertedSpace) {
901 UseCounter::count(element->document(), UseCounter::EditingAppleConvertedSpace);
902 return true;
903 }
904 if (classAttributeValue == ApplePasteAsQuotation) {
905 UseCounter::count(element->document(), UseCounter::EditingApplePasteAsQuotation);
906 return true;
907 }
908
909 return EditingStyle::elementIsStyledSpanOrHTMLEquivalent(element);
910 }
911
elementToSplitToAvoidPastingIntoInlineElementsWithStyle(const Position & insertionPos)912 static inline HTMLElement* elementToSplitToAvoidPastingIntoInlineElementsWithStyle(const Position& insertionPos)
913 {
914 Element* containingBlock = enclosingBlock(insertionPos.containerNode());
915 return toHTMLElement(highestEnclosingNodeOfType(insertionPos, isInlineHTMLElementWithStyle, CannotCrossEditingBoundary, containingBlock));
916 }
917
doApply()918 void ReplaceSelectionCommand::doApply()
919 {
920 VisibleSelection selection = endingSelection();
921 ASSERT(selection.isCaretOrRange());
922 ASSERT(selection.start().deprecatedNode());
923 if (!selection.isNonOrphanedCaretOrRange() || !selection.start().deprecatedNode())
924 return;
925
926 if (!selection.rootEditableElement())
927 return;
928
929 ReplacementFragment fragment(&document(), m_documentFragment.get(), selection);
930 if (performTrivialReplace(fragment))
931 return;
932
933 // We can skip matching the style if the selection is plain text.
934 if ((selection.start().deprecatedNode()->renderer() && selection.start().deprecatedNode()->renderer()->style()->userModify() == READ_WRITE_PLAINTEXT_ONLY)
935 && (selection.end().deprecatedNode()->renderer() && selection.end().deprecatedNode()->renderer()->style()->userModify() == READ_WRITE_PLAINTEXT_ONLY))
936 m_matchStyle = false;
937
938 if (m_matchStyle) {
939 m_insertionStyle = EditingStyle::create(selection.start());
940 m_insertionStyle->mergeTypingStyle(&document());
941 }
942
943 VisiblePosition visibleStart = selection.visibleStart();
944 VisiblePosition visibleEnd = selection.visibleEnd();
945
946 bool selectionEndWasEndOfParagraph = isEndOfParagraph(visibleEnd);
947 bool selectionStartWasStartOfParagraph = isStartOfParagraph(visibleStart);
948
949 Element* enclosingBlockOfVisibleStart = enclosingBlock(visibleStart.deepEquivalent().deprecatedNode());
950
951 Position insertionPos = selection.start();
952 bool startIsInsideMailBlockquote = enclosingNodeOfType(insertionPos, isMailHTMLBlockquoteElement, CanCrossEditingBoundary);
953 bool selectionIsPlainText = !selection.isContentRichlyEditable();
954 Element* currentRoot = selection.rootEditableElement();
955
956 if ((selectionStartWasStartOfParagraph && selectionEndWasEndOfParagraph && !startIsInsideMailBlockquote) ||
957 enclosingBlockOfVisibleStart == currentRoot || isListItem(enclosingBlockOfVisibleStart) || selectionIsPlainText)
958 m_preventNesting = false;
959
960 if (selection.isRange()) {
961 // When the end of the selection being pasted into is at the end of a paragraph, and that selection
962 // spans multiple blocks, not merging may leave an empty line.
963 // When the start of the selection being pasted into is at the start of a block, not merging
964 // will leave hanging block(s).
965 // Merge blocks if the start of the selection was in a Mail blockquote, since we handle
966 // that case specially to prevent nesting.
967 bool mergeBlocksAfterDelete = startIsInsideMailBlockquote || isEndOfParagraph(visibleEnd) || isStartOfBlock(visibleStart);
968 // FIXME: We should only expand to include fully selected special elements if we are copying a
969 // selection and pasting it on top of itself.
970 deleteSelection(false, mergeBlocksAfterDelete, false);
971 visibleStart = endingSelection().visibleStart();
972 if (fragment.hasInterchangeNewlineAtStart()) {
973 if (isEndOfParagraph(visibleStart) && !isStartOfParagraph(visibleStart)) {
974 if (!isEndOfEditableOrNonEditableContent(visibleStart))
975 setEndingSelection(visibleStart.next());
976 } else
977 insertParagraphSeparator();
978 }
979 insertionPos = endingSelection().start();
980 } else {
981 ASSERT(selection.isCaret());
982 if (fragment.hasInterchangeNewlineAtStart()) {
983 VisiblePosition next = visibleStart.next(CannotCrossEditingBoundary);
984 if (isEndOfParagraph(visibleStart) && !isStartOfParagraph(visibleStart) && next.isNotNull())
985 setEndingSelection(next);
986 else {
987 insertParagraphSeparator();
988 visibleStart = endingSelection().visibleStart();
989 }
990 }
991 // We split the current paragraph in two to avoid nesting the blocks from the fragment inside the current block.
992 // For example paste <div>foo</div><div>bar</div><div>baz</div> into <div>x^x</div>, where ^ is the caret.
993 // As long as the div styles are the same, visually you'd expect: <div>xbar</div><div>bar</div><div>bazx</div>,
994 // not <div>xbar<div>bar</div><div>bazx</div></div>.
995 // Don't do this if the selection started in a Mail blockquote.
996 if (m_preventNesting && !startIsInsideMailBlockquote && !isEndOfParagraph(visibleStart) && !isStartOfParagraph(visibleStart)) {
997 insertParagraphSeparator();
998 setEndingSelection(endingSelection().visibleStart().previous());
999 }
1000 insertionPos = endingSelection().start();
1001 }
1002
1003 // We don't want any of the pasted content to end up nested in a Mail blockquote, so first break
1004 // out of any surrounding Mail blockquotes. Unless we're inserting in a table, in which case
1005 // breaking the blockquote will prevent the content from actually being inserted in the table.
1006 if (startIsInsideMailBlockquote && m_preventNesting && !(enclosingNodeOfType(insertionPos, &isTableStructureNode))) {
1007 applyCommandToComposite(BreakBlockquoteCommand::create(document()));
1008 // This will leave a br between the split.
1009 Node* br = endingSelection().start().deprecatedNode();
1010 ASSERT(isHTMLBRElement(br));
1011 // Insert content between the two blockquotes, but remove the br (since it was just a placeholder).
1012 insertionPos = positionInParentBeforeNode(*br);
1013 removeNode(br);
1014 }
1015
1016 // Inserting content could cause whitespace to collapse, e.g. inserting <div>foo</div> into hello^ world.
1017 prepareWhitespaceAtPositionForSplit(insertionPos);
1018
1019 // If the downstream node has been removed there's no point in continuing.
1020 if (!insertionPos.downstream().deprecatedNode())
1021 return;
1022
1023 // NOTE: This would be an incorrect usage of downstream() if downstream() were changed to mean the last position after
1024 // 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
1025 // away, there are positions after the br which map to the same visible position as [br, 0]).
1026 HTMLBRElement* endBR = isHTMLBRElement(*insertionPos.downstream().deprecatedNode()) ? toHTMLBRElement(insertionPos.downstream().deprecatedNode()) : 0;
1027 VisiblePosition originalVisPosBeforeEndBR;
1028 if (endBR)
1029 originalVisPosBeforeEndBR = VisiblePosition(positionBeforeNode(endBR), DOWNSTREAM).previous();
1030
1031 RefPtrWillBeRawPtr<Element> enclosingBlockOfInsertionPos = enclosingBlock(insertionPos.deprecatedNode());
1032
1033 // Adjust insertionPos to prevent nesting.
1034 // If the start was in a Mail blockquote, we will have already handled adjusting insertionPos above.
1035 if (m_preventNesting && enclosingBlockOfInsertionPos && !isTableCell(enclosingBlockOfInsertionPos.get()) && !startIsInsideMailBlockquote) {
1036 ASSERT(enclosingBlockOfInsertionPos != currentRoot);
1037 VisiblePosition visibleInsertionPos(insertionPos);
1038 if (isEndOfBlock(visibleInsertionPos) && !(isStartOfBlock(visibleInsertionPos) && fragment.hasInterchangeNewlineAtEnd()))
1039 insertionPos = positionInParentAfterNode(*enclosingBlockOfInsertionPos);
1040 else if (isStartOfBlock(visibleInsertionPos))
1041 insertionPos = positionInParentBeforeNode(*enclosingBlockOfInsertionPos);
1042 }
1043
1044 // Paste at start or end of link goes outside of link.
1045 insertionPos = positionAvoidingSpecialElementBoundary(insertionPos);
1046
1047 // FIXME: Can this wait until after the operation has been performed? There doesn't seem to be
1048 // any work performed after this that queries or uses the typing style.
1049 if (LocalFrame* frame = document().frame())
1050 frame->selection().clearTypingStyle();
1051
1052 removeHeadContents(fragment);
1053
1054 // We don't want the destination to end up inside nodes that weren't selected. To avoid that, we move the
1055 // position forward without changing the visible position so we're still at the same visible location, but
1056 // outside of preceding tags.
1057 insertionPos = positionAvoidingPrecedingNodes(insertionPos);
1058
1059 // Paste into run of tabs splits the tab span.
1060 insertionPos = positionOutsideTabSpan(insertionPos);
1061
1062 bool handledStyleSpans = handleStyleSpansBeforeInsertion(fragment, insertionPos);
1063
1064 // We're finished if there is nothing to add.
1065 if (fragment.isEmpty() || !fragment.firstChild())
1066 return;
1067
1068 // If we are not trying to match the destination style we prefer a position
1069 // that is outside inline elements that provide style.
1070 // This way we can produce a less verbose markup.
1071 // We can skip this optimization for fragments not wrapped in one of
1072 // our style spans and for positions inside list items
1073 // since insertAsListItems already does the right thing.
1074 if (!m_matchStyle && !enclosingList(insertionPos.containerNode())) {
1075 if (insertionPos.containerNode()->isTextNode() && insertionPos.offsetInContainerNode() && !insertionPos.atLastEditingPositionForNode()) {
1076 splitTextNode(insertionPos.containerText(), insertionPos.offsetInContainerNode());
1077 insertionPos = firstPositionInNode(insertionPos.containerNode());
1078 }
1079
1080 if (RefPtrWillBeRawPtr<HTMLElement> elementToSplitTo = elementToSplitToAvoidPastingIntoInlineElementsWithStyle(insertionPos)) {
1081 if (insertionPos.containerNode() != elementToSplitTo->parentNode()) {
1082 Node* splitStart = insertionPos.computeNodeAfterPosition();
1083 if (!splitStart)
1084 splitStart = insertionPos.containerNode();
1085 RefPtrWillBeRawPtr<Node> nodeToSplitTo = splitTreeToNode(splitStart, elementToSplitTo->parentNode()).get();
1086 insertionPos = positionInParentBeforeNode(*nodeToSplitTo);
1087 }
1088 }
1089 }
1090
1091 // FIXME: When pasting rich content we're often prevented from heading down the fast path by style spans. Try
1092 // again here if they've been removed.
1093
1094 // 1) Insert the content.
1095 // 2) Remove redundant styles and style tags, this inner <b> for example: <b>foo <b>bar</b> baz</b>.
1096 // 3) Merge the start of the added content with the content before the position being pasted into.
1097 // 4) Do one of the following: a) expand the last br if the fragment ends with one and it collapsed,
1098 // b) merge the last paragraph of the incoming fragment with the paragraph that contained the
1099 // end of the selection that was pasted into, or c) handle an interchange newline at the end of the
1100 // incoming fragment.
1101 // 5) Add spaces for smart replace.
1102 // 6) Select the replacement if requested, and match style if requested.
1103
1104 InsertedNodes insertedNodes;
1105 RefPtrWillBeRawPtr<Node> refNode = fragment.firstChild();
1106 ASSERT(refNode);
1107 RefPtrWillBeRawPtr<Node> node = refNode->nextSibling();
1108
1109 fragment.removeNode(refNode);
1110
1111 Element* blockStart = enclosingBlock(insertionPos.deprecatedNode());
1112 if ((isHTMLListElement(refNode.get()) || (isLegacyAppleHTMLSpanElement(refNode.get()) && isHTMLListElement(refNode->firstChild())))
1113 && blockStart && blockStart->renderer()->isListItem())
1114 refNode = insertAsListItems(toHTMLElement(refNode), blockStart, insertionPos, insertedNodes);
1115 else {
1116 insertNodeAt(refNode, insertionPos);
1117 insertedNodes.respondToNodeInsertion(*refNode);
1118 }
1119
1120 // Mutation events (bug 22634) may have already removed the inserted content
1121 if (!refNode->inDocument())
1122 return;
1123
1124 bool plainTextFragment = isPlainTextMarkup(refNode.get());
1125
1126 while (node) {
1127 RefPtrWillBeRawPtr<Node> next = node->nextSibling();
1128 fragment.removeNode(node.get());
1129 insertNodeAfter(node, refNode);
1130 insertedNodes.respondToNodeInsertion(*node);
1131
1132 // Mutation events (bug 22634) may have already removed the inserted content
1133 if (!node->inDocument())
1134 return;
1135
1136 refNode = node;
1137 if (node && plainTextFragment)
1138 plainTextFragment = isPlainTextMarkup(node.get());
1139 node = next;
1140 }
1141
1142 removeUnrenderedTextNodesAtEnds(insertedNodes);
1143
1144 if (!handledStyleSpans)
1145 handleStyleSpans(insertedNodes);
1146
1147 // Mutation events (bug 20161) may have already removed the inserted content
1148 if (!insertedNodes.firstNodeInserted() || !insertedNodes.firstNodeInserted()->inDocument())
1149 return;
1150
1151 // Scripts specified in javascript protocol may remove |enclosingBlockOfInsertionPos|
1152 // during insertion, e.g. <iframe src="javascript:...">
1153 if (enclosingBlockOfInsertionPos && !enclosingBlockOfInsertionPos->inDocument())
1154 enclosingBlockOfInsertionPos = nullptr;
1155
1156 VisiblePosition startOfInsertedContent(firstPositionInOrBeforeNode(insertedNodes.firstNodeInserted()));
1157
1158 // We inserted before the enclosingBlockOfInsertionPos to prevent nesting, and the content before the enclosingBlockOfInsertionPos wasn't in its own block and
1159 // didn't have a br after it, so the inserted content ended up in the same paragraph.
1160 if (!startOfInsertedContent.isNull() && enclosingBlockOfInsertionPos && insertionPos.deprecatedNode() == enclosingBlockOfInsertionPos->parentNode() && (unsigned)insertionPos.deprecatedEditingOffset() < enclosingBlockOfInsertionPos->nodeIndex() && !isStartOfParagraph(startOfInsertedContent))
1161 insertNodeAt(createBreakElement(document()).get(), startOfInsertedContent.deepEquivalent());
1162
1163 if (endBR && (plainTextFragment || (shouldRemoveEndBR(endBR, originalVisPosBeforeEndBR) && !(fragment.hasInterchangeNewlineAtEnd() && selectionIsPlainText)))) {
1164 RefPtrWillBeRawPtr<ContainerNode> parent = endBR->parentNode();
1165 insertedNodes.willRemoveNode(*endBR);
1166 removeNode(endBR);
1167 if (Node* nodeToRemove = highestNodeToRemoveInPruning(parent.get())) {
1168 insertedNodes.willRemoveNode(*nodeToRemove);
1169 removeNode(nodeToRemove);
1170 }
1171 }
1172
1173 makeInsertedContentRoundTrippableWithHTMLTreeBuilder(insertedNodes);
1174
1175 removeRedundantStylesAndKeepStyleSpanInline(insertedNodes);
1176
1177 if (m_sanitizeFragment)
1178 applyCommandToComposite(SimplifyMarkupCommand::create(document(), insertedNodes.firstNodeInserted(), insertedNodes.pastLastLeaf()));
1179
1180 // Setup m_startOfInsertedContent and m_endOfInsertedContent. This should be the last two lines of code that access insertedNodes.
1181 m_startOfInsertedContent = firstPositionInOrBeforeNode(insertedNodes.firstNodeInserted());
1182 m_endOfInsertedContent = lastPositionInOrAfterNode(insertedNodes.lastLeafInserted());
1183
1184 // Determine whether or not we should merge the end of inserted content with what's after it before we do
1185 // the start merge so that the start merge doesn't effect our decision.
1186 m_shouldMergeEnd = shouldMergeEnd(selectionEndWasEndOfParagraph);
1187
1188 if (shouldMergeStart(selectionStartWasStartOfParagraph, fragment.hasInterchangeNewlineAtStart(), startIsInsideMailBlockquote)) {
1189 VisiblePosition startOfParagraphToMove = positionAtStartOfInsertedContent();
1190 VisiblePosition destination = startOfParagraphToMove.previous();
1191 // We need to handle the case where we need to merge the end
1192 // but our destination node is inside an inline that is the last in the block.
1193 // We insert a placeholder before the newly inserted content to avoid being merged into the inline.
1194 Node* destinationNode = destination.deepEquivalent().deprecatedNode();
1195 if (m_shouldMergeEnd && destinationNode != enclosingInline(destinationNode) && enclosingInline(destinationNode)->nextSibling())
1196 insertNodeBefore(createBreakElement(document()), refNode.get());
1197
1198 // Merging the the first paragraph of inserted content with the content that came
1199 // before the selection that was pasted into would also move content after
1200 // the selection that was pasted into if: only one paragraph was being pasted,
1201 // and it was not wrapped in a block, the selection that was pasted into ended
1202 // at the end of a block and the next paragraph didn't start at the start of a block.
1203 // Insert a line break just after the inserted content to separate it from what
1204 // comes after and prevent that from happening.
1205 VisiblePosition endOfInsertedContent = positionAtEndOfInsertedContent();
1206 if (startOfParagraph(endOfInsertedContent) == startOfParagraphToMove) {
1207 insertNodeAt(createBreakElement(document()).get(), endOfInsertedContent.deepEquivalent());
1208 // Mutation events (bug 22634) triggered by inserting the <br> might have removed the content we're about to move
1209 if (!startOfParagraphToMove.deepEquivalent().inDocument())
1210 return;
1211 }
1212
1213 // FIXME: Maintain positions for the start and end of inserted content instead of keeping nodes. The nodes are
1214 // only ever used to create positions where inserted content starts/ends.
1215 moveParagraph(startOfParagraphToMove, endOfParagraph(startOfParagraphToMove), destination);
1216 m_startOfInsertedContent = endingSelection().visibleStart().deepEquivalent().downstream();
1217 if (m_endOfInsertedContent.isOrphan())
1218 m_endOfInsertedContent = endingSelection().visibleEnd().deepEquivalent().upstream();
1219 }
1220
1221 Position lastPositionToSelect;
1222 if (fragment.hasInterchangeNewlineAtEnd()) {
1223 VisiblePosition endOfInsertedContent = positionAtEndOfInsertedContent();
1224 VisiblePosition next = endOfInsertedContent.next(CannotCrossEditingBoundary);
1225
1226 if (selectionEndWasEndOfParagraph || !isEndOfParagraph(endOfInsertedContent) || next.isNull()) {
1227 if (!isStartOfParagraph(endOfInsertedContent)) {
1228 setEndingSelection(endOfInsertedContent);
1229 Element* enclosingBlockElement = enclosingBlock(endOfInsertedContent.deepEquivalent().deprecatedNode());
1230 if (isListItem(enclosingBlockElement)) {
1231 RefPtrWillBeRawPtr<HTMLLIElement> newListItem = createListItemElement(document());
1232 insertNodeAfter(newListItem, enclosingBlockElement);
1233 setEndingSelection(VisiblePosition(firstPositionInNode(newListItem.get())));
1234 } else {
1235 // Use a default paragraph element (a plain div) for the empty paragraph, using the last paragraph
1236 // block's style seems to annoy users.
1237 insertParagraphSeparator(true, !startIsInsideMailBlockquote && highestEnclosingNodeOfType(endOfInsertedContent.deepEquivalent(),
1238 isMailHTMLBlockquoteElement, CannotCrossEditingBoundary, insertedNodes.firstNodeInserted()->parentNode()));
1239 }
1240
1241 // Select up to the paragraph separator that was added.
1242 lastPositionToSelect = endingSelection().visibleStart().deepEquivalent();
1243 updateNodesInserted(lastPositionToSelect.deprecatedNode());
1244 }
1245 } else {
1246 // Select up to the beginning of the next paragraph.
1247 lastPositionToSelect = next.deepEquivalent().downstream();
1248 }
1249 } else {
1250 mergeEndIfNeeded();
1251 }
1252
1253 if (HTMLQuoteElement* mailBlockquote = toHTMLQuoteElement(enclosingNodeOfType(positionAtStartOfInsertedContent().deepEquivalent(), isMailPasteAsQuotationHTMLBlockQuoteElement)))
1254 removeElementAttribute(mailBlockquote, classAttr);
1255
1256 if (shouldPerformSmartReplace())
1257 addSpacesForSmartReplace();
1258
1259 // If we are dealing with a fragment created from plain text
1260 // no style matching is necessary.
1261 if (plainTextFragment)
1262 m_matchStyle = false;
1263
1264 completeHTMLReplacement(lastPositionToSelect);
1265 }
1266
shouldRemoveEndBR(HTMLBRElement * endBR,const VisiblePosition & originalVisPosBeforeEndBR)1267 bool ReplaceSelectionCommand::shouldRemoveEndBR(HTMLBRElement* endBR, const VisiblePosition& originalVisPosBeforeEndBR)
1268 {
1269 if (!endBR || !endBR->inDocument())
1270 return false;
1271
1272 VisiblePosition visiblePos(positionBeforeNode(endBR));
1273
1274 // Don't remove the br if nothing was inserted.
1275 if (visiblePos.previous() == originalVisPosBeforeEndBR)
1276 return false;
1277
1278 // Remove the br if it is collapsed away and so is unnecessary.
1279 if (!document().inNoQuirksMode() && isEndOfBlock(visiblePos) && !isStartOfParagraph(visiblePos))
1280 return true;
1281
1282 // A br that was originally holding a line open should be displaced by inserted content or turned into a line break.
1283 // A br that was originally acting as a line break should still be acting as a line break, not as a placeholder.
1284 return isStartOfParagraph(visiblePos) && isEndOfParagraph(visiblePos);
1285 }
1286
shouldPerformSmartReplace() const1287 bool ReplaceSelectionCommand::shouldPerformSmartReplace() const
1288 {
1289 if (!m_smartReplace)
1290 return false;
1291
1292 HTMLTextFormControlElement* textControl = enclosingTextFormControl(positionAtStartOfInsertedContent().deepEquivalent());
1293 if (isHTMLInputElement(textControl) && toHTMLInputElement(textControl)->type() == InputTypeNames::password)
1294 return false; // Disable smart replace for password fields.
1295
1296 return true;
1297 }
1298
isCharacterSmartReplaceExemptConsideringNonBreakingSpace(UChar32 character,bool previousCharacter)1299 static bool isCharacterSmartReplaceExemptConsideringNonBreakingSpace(UChar32 character, bool previousCharacter)
1300 {
1301 return isCharacterSmartReplaceExempt(character == noBreakSpace ? ' ' : character, previousCharacter);
1302 }
1303
addSpacesForSmartReplace()1304 void ReplaceSelectionCommand::addSpacesForSmartReplace()
1305 {
1306 VisiblePosition startOfInsertedContent = positionAtStartOfInsertedContent();
1307 VisiblePosition endOfInsertedContent = positionAtEndOfInsertedContent();
1308
1309 Position endUpstream = endOfInsertedContent.deepEquivalent().upstream();
1310 Node* endNode = endUpstream.computeNodeBeforePosition();
1311 int endOffset = endNode && endNode->isTextNode() ? toText(endNode)->length() : 0;
1312 if (endUpstream.anchorType() == Position::PositionIsOffsetInAnchor) {
1313 endNode = endUpstream.containerNode();
1314 endOffset = endUpstream.offsetInContainerNode();
1315 }
1316
1317 bool needsTrailingSpace = !isEndOfParagraph(endOfInsertedContent) && !isCharacterSmartReplaceExemptConsideringNonBreakingSpace(endOfInsertedContent.characterAfter(), false);
1318 if (needsTrailingSpace && endNode) {
1319 bool collapseWhiteSpace = !endNode->renderer() || endNode->renderer()->style()->collapseWhiteSpace();
1320 if (endNode->isTextNode()) {
1321 insertTextIntoNode(toText(endNode), endOffset, collapseWhiteSpace ? nonBreakingSpaceString() : " ");
1322 if (m_endOfInsertedContent.containerNode() == endNode)
1323 m_endOfInsertedContent.moveToOffset(m_endOfInsertedContent.offsetInContainerNode() + 1);
1324 } else {
1325 RefPtrWillBeRawPtr<Text> node = document().createEditingTextNode(collapseWhiteSpace ? nonBreakingSpaceString() : " ");
1326 insertNodeAfter(node, endNode);
1327 updateNodesInserted(node.get());
1328 }
1329 }
1330
1331 document().updateLayout();
1332
1333 Position startDownstream = startOfInsertedContent.deepEquivalent().downstream();
1334 Node* startNode = startDownstream.computeNodeAfterPosition();
1335 unsigned startOffset = 0;
1336 if (startDownstream.anchorType() == Position::PositionIsOffsetInAnchor) {
1337 startNode = startDownstream.containerNode();
1338 startOffset = startDownstream.offsetInContainerNode();
1339 }
1340
1341 bool needsLeadingSpace = !isStartOfParagraph(startOfInsertedContent) && !isCharacterSmartReplaceExemptConsideringNonBreakingSpace(startOfInsertedContent.previous().characterAfter(), true);
1342 if (needsLeadingSpace && startNode) {
1343 bool collapseWhiteSpace = !startNode->renderer() || startNode->renderer()->style()->collapseWhiteSpace();
1344 if (startNode->isTextNode()) {
1345 insertTextIntoNode(toText(startNode), startOffset, collapseWhiteSpace ? nonBreakingSpaceString() : " ");
1346 if (m_endOfInsertedContent.containerNode() == startNode && m_endOfInsertedContent.offsetInContainerNode())
1347 m_endOfInsertedContent.moveToOffset(m_endOfInsertedContent.offsetInContainerNode() + 1);
1348 } else {
1349 RefPtrWillBeRawPtr<Text> node = document().createEditingTextNode(collapseWhiteSpace ? nonBreakingSpaceString() : " ");
1350 // Don't updateNodesInserted. Doing so would set m_endOfInsertedContent to be the node containing the leading space,
1351 // but m_endOfInsertedContent is supposed to mark the end of pasted content.
1352 insertNodeBefore(node, startNode);
1353 m_startOfInsertedContent = firstPositionInNode(node.get());
1354 }
1355 }
1356 }
1357
completeHTMLReplacement(const Position & lastPositionToSelect)1358 void ReplaceSelectionCommand::completeHTMLReplacement(const Position &lastPositionToSelect)
1359 {
1360 Position start = positionAtStartOfInsertedContent().deepEquivalent();
1361 Position end = positionAtEndOfInsertedContent().deepEquivalent();
1362
1363 // Mutation events may have deleted start or end
1364 if (start.isNotNull() && !start.isOrphan() && end.isNotNull() && !end.isOrphan()) {
1365 // FIXME (11475): Remove this and require that the creator of the fragment to use nbsps.
1366 rebalanceWhitespaceAt(start);
1367 rebalanceWhitespaceAt(end);
1368
1369 if (m_matchStyle) {
1370 ASSERT(m_insertionStyle);
1371 applyStyle(m_insertionStyle.get(), start, end);
1372 }
1373
1374 if (lastPositionToSelect.isNotNull())
1375 end = lastPositionToSelect;
1376
1377 mergeTextNodesAroundPosition(start, end);
1378 } else if (lastPositionToSelect.isNotNull())
1379 start = end = lastPositionToSelect;
1380 else
1381 return;
1382
1383 if (m_selectReplacement)
1384 setEndingSelection(VisibleSelection(start, end, SEL_DEFAULT_AFFINITY, endingSelection().isDirectional()));
1385 else
1386 setEndingSelection(VisibleSelection(end, SEL_DEFAULT_AFFINITY, endingSelection().isDirectional()));
1387 }
1388
mergeTextNodesAroundPosition(Position & position,Position & positionOnlyToBeUpdated)1389 void ReplaceSelectionCommand::mergeTextNodesAroundPosition(Position& position, Position& positionOnlyToBeUpdated)
1390 {
1391 bool positionIsOffsetInAnchor = position.anchorType() == Position::PositionIsOffsetInAnchor;
1392 bool positionOnlyToBeUpdatedIsOffsetInAnchor = positionOnlyToBeUpdated.anchorType() == Position::PositionIsOffsetInAnchor;
1393 RefPtrWillBeRawPtr<Text> text = nullptr;
1394 if (positionIsOffsetInAnchor && position.containerNode() && position.containerNode()->isTextNode())
1395 text = toText(position.containerNode());
1396 else {
1397 Node* before = position.computeNodeBeforePosition();
1398 if (before && before->isTextNode())
1399 text = toText(before);
1400 else {
1401 Node* after = position.computeNodeAfterPosition();
1402 if (after && after->isTextNode())
1403 text = toText(after);
1404 }
1405 }
1406 if (!text)
1407 return;
1408
1409 if (text->previousSibling() && text->previousSibling()->isTextNode()) {
1410 RefPtrWillBeRawPtr<Text> previous = toText(text->previousSibling());
1411 insertTextIntoNode(text, 0, previous->data());
1412
1413 if (positionIsOffsetInAnchor)
1414 position.moveToOffset(previous->length() + position.offsetInContainerNode());
1415 else
1416 updatePositionForNodeRemoval(position, *previous);
1417
1418 if (positionOnlyToBeUpdatedIsOffsetInAnchor) {
1419 if (positionOnlyToBeUpdated.containerNode() == text)
1420 positionOnlyToBeUpdated.moveToOffset(previous->length() + positionOnlyToBeUpdated.offsetInContainerNode());
1421 else if (positionOnlyToBeUpdated.containerNode() == previous)
1422 positionOnlyToBeUpdated.moveToPosition(text, positionOnlyToBeUpdated.offsetInContainerNode());
1423 } else {
1424 updatePositionForNodeRemoval(positionOnlyToBeUpdated, *previous);
1425 }
1426
1427 removeNode(previous);
1428 }
1429 if (text->nextSibling() && text->nextSibling()->isTextNode()) {
1430 RefPtrWillBeRawPtr<Text> next = toText(text->nextSibling());
1431 unsigned originalLength = text->length();
1432 insertTextIntoNode(text, originalLength, next->data());
1433
1434 if (!positionIsOffsetInAnchor)
1435 updatePositionForNodeRemoval(position, *next);
1436
1437 if (positionOnlyToBeUpdatedIsOffsetInAnchor && positionOnlyToBeUpdated.containerNode() == next)
1438 positionOnlyToBeUpdated.moveToPosition(text, originalLength + positionOnlyToBeUpdated.offsetInContainerNode());
1439 else
1440 updatePositionForNodeRemoval(positionOnlyToBeUpdated, *next);
1441
1442 removeNode(next);
1443 }
1444 }
1445
editingAction() const1446 EditAction ReplaceSelectionCommand::editingAction() const
1447 {
1448 return m_editAction;
1449 }
1450
1451 // If the user is inserting a list into an existing list, instead of nesting the list,
1452 // we put the list items into the existing list.
insertAsListItems(PassRefPtrWillBeRawPtr<HTMLElement> prpListElement,Element * insertionBlock,const Position & insertPos,InsertedNodes & insertedNodes)1453 Node* ReplaceSelectionCommand::insertAsListItems(PassRefPtrWillBeRawPtr<HTMLElement> prpListElement, Element* insertionBlock, const Position& insertPos, InsertedNodes& insertedNodes)
1454 {
1455 RefPtrWillBeRawPtr<HTMLElement> listElement = prpListElement;
1456
1457 while (listElement->hasOneChild() && isHTMLListElement(listElement->firstChild()))
1458 listElement = toHTMLElement(listElement->firstChild());
1459
1460 bool isStart = isStartOfParagraph(VisiblePosition(insertPos));
1461 bool isEnd = isEndOfParagraph(VisiblePosition(insertPos));
1462 bool isMiddle = !isStart && !isEnd;
1463 Node* lastNode = insertionBlock;
1464
1465 // If we're in the middle of a list item, we should split it into two separate
1466 // list items and insert these nodes between them.
1467 if (isMiddle) {
1468 int textNodeOffset = insertPos.offsetInContainerNode();
1469 if (insertPos.deprecatedNode()->isTextNode() && textNodeOffset > 0)
1470 splitTextNode(toText(insertPos.deprecatedNode()), textNodeOffset);
1471 splitTreeToNode(insertPos.deprecatedNode(), lastNode, true);
1472 }
1473
1474 while (RefPtrWillBeRawPtr<Node> listItem = listElement->firstChild()) {
1475 listElement->removeChild(listItem.get(), ASSERT_NO_EXCEPTION);
1476 if (isStart || isMiddle) {
1477 insertNodeBefore(listItem, lastNode);
1478 insertedNodes.respondToNodeInsertion(*listItem);
1479 } else if (isEnd) {
1480 insertNodeAfter(listItem, lastNode);
1481 insertedNodes.respondToNodeInsertion(*listItem);
1482 lastNode = listItem.get();
1483 } else
1484 ASSERT_NOT_REACHED();
1485 }
1486 if (isStart || isMiddle) {
1487 if (Node* node = lastNode->previousSibling())
1488 return node;
1489 }
1490 return lastNode;
1491 }
1492
updateNodesInserted(Node * node)1493 void ReplaceSelectionCommand::updateNodesInserted(Node *node)
1494 {
1495 if (!node)
1496 return;
1497
1498 if (m_startOfInsertedContent.isNull())
1499 m_startOfInsertedContent = firstPositionInOrBeforeNode(node);
1500
1501 m_endOfInsertedContent = lastPositionInOrAfterNode(&NodeTraversal::lastWithinOrSelf(*node));
1502 }
1503
1504 // During simple pastes, where we're just pasting a text node into a run of text, we insert the text node
1505 // directly into the text node that holds the selection. This is much faster than the generalized code in
1506 // ReplaceSelectionCommand, and works around <https://bugs.webkit.org/show_bug.cgi?id=6148> since we don't
1507 // split text nodes.
performTrivialReplace(const ReplacementFragment & fragment)1508 bool ReplaceSelectionCommand::performTrivialReplace(const ReplacementFragment& fragment)
1509 {
1510 if (!fragment.firstChild() || fragment.firstChild() != fragment.lastChild() || !fragment.firstChild()->isTextNode())
1511 return false;
1512
1513 // FIXME: Would be nice to handle smart replace in the fast path.
1514 if (m_smartReplace || fragment.hasInterchangeNewlineAtStart() || fragment.hasInterchangeNewlineAtEnd())
1515 return false;
1516
1517 // e.g. when "bar" is inserted after "foo" in <div><u>foo</u></div>, "bar" should not be underlined.
1518 if (elementToSplitToAvoidPastingIntoInlineElementsWithStyle(endingSelection().start()))
1519 return false;
1520
1521 RefPtrWillBeRawPtr<Node> nodeAfterInsertionPos = endingSelection().end().downstream().anchorNode();
1522 Text* textNode = toText(fragment.firstChild());
1523 // Our fragment creation code handles tabs, spaces, and newlines, so we don't have to worry about those here.
1524
1525 Position start = endingSelection().start();
1526 Position end = replaceSelectedTextInNode(textNode->data());
1527 if (end.isNull())
1528 return false;
1529
1530 if (nodeAfterInsertionPos && nodeAfterInsertionPos->parentNode() && isHTMLBRElement(*nodeAfterInsertionPos)
1531 && shouldRemoveEndBR(toHTMLBRElement(nodeAfterInsertionPos.get()), VisiblePosition(positionBeforeNode(nodeAfterInsertionPos.get()))))
1532 removeNodeAndPruneAncestors(nodeAfterInsertionPos.get());
1533
1534 VisibleSelection selectionAfterReplace(m_selectReplacement ? start : end, end);
1535
1536 setEndingSelection(selectionAfterReplace);
1537
1538 return true;
1539 }
1540
trace(Visitor * visitor)1541 void ReplaceSelectionCommand::trace(Visitor* visitor)
1542 {
1543 visitor->trace(m_startOfInsertedContent);
1544 visitor->trace(m_endOfInsertedContent);
1545 visitor->trace(m_insertionStyle);
1546 visitor->trace(m_documentFragment);
1547 CompositeEditCommand::trace(visitor);
1548 }
1549
1550 } // namespace blink
1551