1 /*
2 * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
3 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
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/Editor.h"
29
30 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
31 #include "core/CSSPropertyNames.h"
32 #include "core/EventNames.h"
33 #include "core/HTMLNames.h"
34 #include "core/XLinkNames.h"
35 #include "core/accessibility/AXObjectCache.h"
36 #include "core/clipboard/DataObject.h"
37 #include "core/clipboard/DataTransfer.h"
38 #include "core/clipboard/Pasteboard.h"
39 #include "core/css/CSSComputedStyleDeclaration.h"
40 #include "core/css/StylePropertySet.h"
41 #include "core/dom/DocumentFragment.h"
42 #include "core/dom/DocumentMarkerController.h"
43 #include "core/dom/NodeTraversal.h"
44 #include "core/dom/ParserContentPolicy.h"
45 #include "core/dom/Text.h"
46 #include "core/editing/ApplyStyleCommand.h"
47 #include "core/editing/DeleteSelectionCommand.h"
48 #include "core/editing/IndentOutdentCommand.h"
49 #include "core/editing/InputMethodController.h"
50 #include "core/editing/InsertListCommand.h"
51 #include "core/editing/RemoveFormatCommand.h"
52 #include "core/editing/RenderedPosition.h"
53 #include "core/editing/ReplaceSelectionCommand.h"
54 #include "core/editing/SimplifyMarkupCommand.h"
55 #include "core/editing/SpellChecker.h"
56 #include "core/editing/TypingCommand.h"
57 #include "core/editing/UndoStack.h"
58 #include "core/editing/VisibleUnits.h"
59 #include "core/editing/htmlediting.h"
60 #include "core/editing/markup.h"
61 #include "core/events/ClipboardEvent.h"
62 #include "core/events/KeyboardEvent.h"
63 #include "core/events/ScopedEventQueue.h"
64 #include "core/events/TextEvent.h"
65 #include "core/fetch/ImageResource.h"
66 #include "core/fetch/ResourceFetcher.h"
67 #include "core/frame/FrameView.h"
68 #include "core/frame/LocalFrame.h"
69 #include "core/frame/Settings.h"
70 #include "core/frame/UseCounter.h"
71 #include "core/html/HTMLCanvasElement.h"
72 #include "core/html/HTMLImageElement.h"
73 #include "core/html/HTMLInputElement.h"
74 #include "core/html/HTMLTextAreaElement.h"
75 #include "core/html/parser/HTMLParserIdioms.h"
76 #include "core/loader/EmptyClients.h"
77 #include "core/page/EditorClient.h"
78 #include "core/page/EventHandler.h"
79 #include "core/page/FocusController.h"
80 #include "core/page/Page.h"
81 #include "core/rendering/HitTestResult.h"
82 #include "core/rendering/RenderImage.h"
83 #include "core/svg/SVGImageElement.h"
84 #include "platform/KillRing.h"
85 #include "platform/weborigin/KURL.h"
86 #include "wtf/unicode/CharacterNames.h"
87
88 namespace blink {
89
90 using namespace HTMLNames;
91 using namespace WTF;
92 using namespace Unicode;
93
RevealSelectionScope(Editor * editor)94 Editor::RevealSelectionScope::RevealSelectionScope(Editor* editor)
95 : m_editor(editor)
96 {
97 ++m_editor->m_preventRevealSelection;
98 }
99
~RevealSelectionScope()100 Editor::RevealSelectionScope::~RevealSelectionScope()
101 {
102 ASSERT(m_editor->m_preventRevealSelection);
103 --m_editor->m_preventRevealSelection;
104 if (!m_editor->m_preventRevealSelection)
105 m_editor->frame().selection().revealSelection(ScrollAlignment::alignToEdgeIfNeeded, RevealExtent);
106 }
107
108 // When an event handler has moved the selection outside of a text control
109 // we should use the target control's selection for this editing operation.
selectionForCommand(Event * event)110 VisibleSelection Editor::selectionForCommand(Event* event)
111 {
112 VisibleSelection selection = frame().selection().selection();
113 if (!event)
114 return selection;
115 // If the target is a text control, and the current selection is outside of its shadow tree,
116 // then use the saved selection for that text control.
117 HTMLTextFormControlElement* textFormControlOfSelectionStart = enclosingTextFormControl(selection.start());
118 HTMLTextFormControlElement* textFromControlOfTarget = isHTMLTextFormControlElement(*event->target()->toNode()) ? toHTMLTextFormControlElement(event->target()->toNode()) : 0;
119 if (textFromControlOfTarget && (selection.start().isNull() || textFromControlOfTarget != textFormControlOfSelectionStart)) {
120 if (RefPtrWillBeRawPtr<Range> range = textFromControlOfTarget->selection())
121 return VisibleSelection(range.get(), DOWNSTREAM, selection.isDirectional());
122 }
123 return selection;
124 }
125
126 // Function considers Mac editing behavior a fallback when Page or Settings is not available.
behavior() const127 EditingBehavior Editor::behavior() const
128 {
129 if (!frame().settings())
130 return EditingBehavior(EditingMacBehavior);
131
132 return EditingBehavior(frame().settings()->editingBehaviorType());
133 }
134
emptyEditorClient()135 static EditorClient& emptyEditorClient()
136 {
137 DEFINE_STATIC_LOCAL(EmptyEditorClient, client, ());
138 return client;
139 }
140
client() const141 EditorClient& Editor::client() const
142 {
143 if (Page* page = frame().page())
144 return page->editorClient();
145 return emptyEditorClient();
146 }
147
undoStack() const148 UndoStack* Editor::undoStack() const
149 {
150 if (Page* page = frame().page())
151 return &page->undoStack();
152 return 0;
153 }
154
handleTextEvent(TextEvent * event)155 bool Editor::handleTextEvent(TextEvent* event)
156 {
157 // Default event handling for Drag and Drop will be handled by DragController
158 // so we leave the event for it.
159 if (event->isDrop())
160 return false;
161
162 if (event->isPaste()) {
163 if (event->pastingFragment())
164 replaceSelectionWithFragment(event->pastingFragment(), false, event->shouldSmartReplace(), event->shouldMatchStyle());
165 else
166 replaceSelectionWithText(event->data(), false, event->shouldSmartReplace());
167 return true;
168 }
169
170 String data = event->data();
171 if (data == "\n") {
172 if (event->isLineBreak())
173 return insertLineBreak();
174 return insertParagraphSeparator();
175 }
176
177 return insertTextWithoutSendingTextEvent(data, false, event);
178 }
179
canEdit() const180 bool Editor::canEdit() const
181 {
182 return frame().selection().rootEditableElement();
183 }
184
canEditRichly() const185 bool Editor::canEditRichly() const
186 {
187 return frame().selection().isContentRichlyEditable();
188 }
189
190 // WinIE uses onbeforecut and onbeforepaste to enables the cut and paste menu items. They
191 // also send onbeforecopy, apparently for symmetry, but it doesn't affect the menu items.
192 // We need to use onbeforecopy as a real menu enabler because we allow elements that are not
193 // normally selectable to implement copy/paste (like divs, or a document body).
194
canDHTMLCut()195 bool Editor::canDHTMLCut()
196 {
197 return !frame().selection().isInPasswordField() && !dispatchCPPEvent(EventTypeNames::beforecut, DataTransferNumb);
198 }
199
canDHTMLCopy()200 bool Editor::canDHTMLCopy()
201 {
202 return !frame().selection().isInPasswordField() && !dispatchCPPEvent(EventTypeNames::beforecopy, DataTransferNumb);
203 }
204
canDHTMLPaste()205 bool Editor::canDHTMLPaste()
206 {
207 return !dispatchCPPEvent(EventTypeNames::beforepaste, DataTransferNumb);
208 }
209
canCut() const210 bool Editor::canCut() const
211 {
212 return canCopy() && canDelete();
213 }
214
imageElementFromImageDocument(Document * document)215 static HTMLImageElement* imageElementFromImageDocument(Document* document)
216 {
217 if (!document)
218 return 0;
219 if (!document->isImageDocument())
220 return 0;
221
222 HTMLElement* body = document->body();
223 if (!body)
224 return 0;
225
226 Node* node = body->firstChild();
227 if (!isHTMLImageElement(node))
228 return 0;
229 return toHTMLImageElement(node);
230 }
231
canCopy() const232 bool Editor::canCopy() const
233 {
234 if (imageElementFromImageDocument(frame().document()))
235 return true;
236 FrameSelection& selection = frame().selection();
237 return selection.isRange() && !selection.isInPasswordField();
238 }
239
canPaste() const240 bool Editor::canPaste() const
241 {
242 return canEdit();
243 }
244
canDelete() const245 bool Editor::canDelete() const
246 {
247 FrameSelection& selection = frame().selection();
248 return selection.isRange() && selection.rootEditableElement();
249 }
250
canDeleteRange(Range * range) const251 bool Editor::canDeleteRange(Range* range) const
252 {
253 Node* startContainer = range->startContainer();
254 Node* endContainer = range->endContainer();
255 if (!startContainer || !endContainer)
256 return false;
257
258 if (!startContainer->hasEditableStyle() || !endContainer->hasEditableStyle())
259 return false;
260
261 if (range->collapsed()) {
262 VisiblePosition start(range->startPosition(), DOWNSTREAM);
263 VisiblePosition previous = start.previous();
264 // FIXME: We sometimes allow deletions at the start of editable roots, like when the caret is in an empty list item.
265 if (previous.isNull() || previous.deepEquivalent().deprecatedNode()->rootEditableElement() != startContainer->rootEditableElement())
266 return false;
267 }
268 return true;
269 }
270
smartInsertDeleteEnabled() const271 bool Editor::smartInsertDeleteEnabled() const
272 {
273 if (Settings* settings = frame().settings())
274 return settings->smartInsertDeleteEnabled();
275 return false;
276 }
277
canSmartCopyOrDelete() const278 bool Editor::canSmartCopyOrDelete() const
279 {
280 return smartInsertDeleteEnabled() && frame().selection().granularity() == WordGranularity;
281 }
282
isSelectTrailingWhitespaceEnabled() const283 bool Editor::isSelectTrailingWhitespaceEnabled() const
284 {
285 if (Settings* settings = frame().settings())
286 return settings->selectTrailingWhitespaceEnabled();
287 return false;
288 }
289
deleteWithDirection(SelectionDirection direction,TextGranularity granularity,bool killRing,bool isTypingAction)290 bool Editor::deleteWithDirection(SelectionDirection direction, TextGranularity granularity, bool killRing, bool isTypingAction)
291 {
292 if (!canEdit())
293 return false;
294
295 if (frame().selection().isRange()) {
296 if (isTypingAction) {
297 ASSERT(frame().document());
298 TypingCommand::deleteKeyPressed(*frame().document(), canSmartCopyOrDelete() ? TypingCommand::SmartDelete : 0, granularity);
299 revealSelectionAfterEditingOperation();
300 } else {
301 if (killRing)
302 addToKillRing(selectedRange().get(), false);
303 deleteSelectionWithSmartDelete(canSmartCopyOrDelete());
304 // Implicitly calls revealSelectionAfterEditingOperation().
305 }
306 } else {
307 TypingCommand::Options options = 0;
308 if (canSmartCopyOrDelete())
309 options |= TypingCommand::SmartDelete;
310 if (killRing)
311 options |= TypingCommand::KillRing;
312 switch (direction) {
313 case DirectionForward:
314 case DirectionRight:
315 ASSERT(frame().document());
316 TypingCommand::forwardDeleteKeyPressed(*frame().document(), options, granularity);
317 break;
318 case DirectionBackward:
319 case DirectionLeft:
320 ASSERT(frame().document());
321 TypingCommand::deleteKeyPressed(*frame().document(), options, granularity);
322 break;
323 }
324 revealSelectionAfterEditingOperation();
325 }
326
327 // FIXME: We should to move this down into deleteKeyPressed.
328 // clear the "start new kill ring sequence" setting, because it was set to true
329 // when the selection was updated by deleting the range
330 if (killRing)
331 setStartNewKillRingSequence(false);
332
333 return true;
334 }
335
deleteSelectionWithSmartDelete(bool smartDelete)336 void Editor::deleteSelectionWithSmartDelete(bool smartDelete)
337 {
338 if (frame().selection().isNone())
339 return;
340
341 ASSERT(frame().document());
342 DeleteSelectionCommand::create(*frame().document(), smartDelete)->apply();
343 }
344
pasteAsPlainText(const String & pastingText,bool smartReplace)345 void Editor::pasteAsPlainText(const String& pastingText, bool smartReplace)
346 {
347 Element* target = findEventTargetFromSelection();
348 if (!target)
349 return;
350 target->dispatchEvent(TextEvent::createForPlainTextPaste(frame().domWindow(), pastingText, smartReplace), IGNORE_EXCEPTION);
351 }
352
pasteAsFragment(PassRefPtrWillBeRawPtr<DocumentFragment> pastingFragment,bool smartReplace,bool matchStyle)353 void Editor::pasteAsFragment(PassRefPtrWillBeRawPtr<DocumentFragment> pastingFragment, bool smartReplace, bool matchStyle)
354 {
355 Element* target = findEventTargetFromSelection();
356 if (!target)
357 return;
358 target->dispatchEvent(TextEvent::createForFragmentPaste(frame().domWindow(), pastingFragment, smartReplace, matchStyle), IGNORE_EXCEPTION);
359 }
360
tryDHTMLCopy()361 bool Editor::tryDHTMLCopy()
362 {
363 if (frame().selection().isInPasswordField())
364 return false;
365
366 return !dispatchCPPEvent(EventTypeNames::copy, DataTransferWritable);
367 }
368
tryDHTMLCut()369 bool Editor::tryDHTMLCut()
370 {
371 if (frame().selection().isInPasswordField())
372 return false;
373
374 return !dispatchCPPEvent(EventTypeNames::cut, DataTransferWritable);
375 }
376
tryDHTMLPaste(PasteMode pasteMode)377 bool Editor::tryDHTMLPaste(PasteMode pasteMode)
378 {
379 return !dispatchCPPEvent(EventTypeNames::paste, DataTransferReadable, pasteMode);
380 }
381
pasteAsPlainTextWithPasteboard(Pasteboard * pasteboard)382 void Editor::pasteAsPlainTextWithPasteboard(Pasteboard* pasteboard)
383 {
384 String text = pasteboard->plainText();
385 pasteAsPlainText(text, canSmartReplaceWithPasteboard(pasteboard));
386 }
387
pasteWithPasteboard(Pasteboard * pasteboard)388 void Editor::pasteWithPasteboard(Pasteboard* pasteboard)
389 {
390 RefPtrWillBeRawPtr<Range> range = selectedRange();
391 RefPtrWillBeRawPtr<DocumentFragment> fragment = nullptr;
392 bool chosePlainText = false;
393
394 if (pasteboard->isHTMLAvailable()) {
395 unsigned fragmentStart = 0;
396 unsigned fragmentEnd = 0;
397 KURL url;
398 String markup = pasteboard->readHTML(url, fragmentStart, fragmentEnd);
399 if (!markup.isEmpty()) {
400 ASSERT(frame().document());
401 fragment = createFragmentFromMarkupWithContext(*frame().document(), markup, fragmentStart, fragmentEnd, url, DisallowScriptingAndPluginContent);
402 }
403 }
404
405 if (!fragment) {
406 String text = pasteboard->plainText();
407 if (!text.isEmpty()) {
408 chosePlainText = true;
409 fragment = createFragmentFromText(range.get(), text);
410 }
411 }
412
413 if (fragment)
414 pasteAsFragment(fragment, canSmartReplaceWithPasteboard(pasteboard), chosePlainText);
415 }
416
writeSelectionToPasteboard(Pasteboard * pasteboard,Range * selectedRange,const String & plainText)417 void Editor::writeSelectionToPasteboard(Pasteboard* pasteboard, Range* selectedRange, const String& plainText)
418 {
419 String html = createMarkup(selectedRange, 0, AnnotateForInterchange, false, ResolveNonLocalURLs);
420 KURL url = selectedRange->startContainer()->document().url();
421 pasteboard->writeHTML(html, url, plainText, canSmartCopyOrDelete());
422 }
423
imageFromNode(const Node & node)424 static Image* imageFromNode(const Node& node)
425 {
426 node.document().updateLayoutIgnorePendingStylesheets();
427 RenderObject* renderer = node.renderer();
428 if (!renderer)
429 return nullptr;
430
431 if (renderer->isCanvas())
432 return toHTMLCanvasElement(node).copiedImage();
433
434 if (renderer->isImage()) {
435 RenderImage* renderImage = toRenderImage(renderer);
436 if (!renderImage)
437 return nullptr;
438
439 ImageResource* cachedImage = renderImage->cachedImage();
440 if (!cachedImage || cachedImage->errorOccurred())
441 return nullptr;
442 return cachedImage->imageForRenderer(renderImage);
443 }
444
445 return nullptr;
446 }
447
writeImageNodeToPasteboard(Pasteboard * pasteboard,Node * node,const String & title)448 static void writeImageNodeToPasteboard(Pasteboard* pasteboard, Node* node, const String& title)
449 {
450 ASSERT(pasteboard);
451 ASSERT(node);
452
453 RefPtr<Image> image = imageFromNode(*node);
454 if (!image.get())
455 return;
456
457 // FIXME: This should probably be reconciled with HitTestResult::absoluteImageURL.
458 AtomicString urlString;
459 if (isHTMLImageElement(*node) || isHTMLInputElement(*node))
460 urlString = toHTMLElement(node)->getAttribute(srcAttr);
461 else if (isSVGImageElement(*node))
462 urlString = toSVGElement(node)->getAttribute(XLinkNames::hrefAttr);
463 else if (isHTMLEmbedElement(*node) || isHTMLObjectElement(*node) || isHTMLCanvasElement(*node))
464 urlString = toHTMLElement(node)->imageSourceURL();
465 KURL url = urlString.isEmpty() ? KURL() : node->document().completeURL(stripLeadingAndTrailingHTMLSpaces(urlString));
466
467 pasteboard->writeImage(image.get(), url, title);
468 }
469
470 // Returns whether caller should continue with "the default processing", which is the same as
471 // the event handler NOT setting the return value to false
dispatchCPPEvent(const AtomicString & eventType,DataTransferAccessPolicy policy,PasteMode pasteMode)472 bool Editor::dispatchCPPEvent(const AtomicString& eventType, DataTransferAccessPolicy policy, PasteMode pasteMode)
473 {
474 Element* target = findEventTargetFromSelection();
475 if (!target)
476 return true;
477
478 RefPtrWillBeRawPtr<DataTransfer> dataTransfer = DataTransfer::create(
479 DataTransfer::CopyAndPaste,
480 policy,
481 policy == DataTransferWritable
482 ? DataObject::create()
483 : DataObject::createFromPasteboard(pasteMode));
484
485 RefPtrWillBeRawPtr<Event> evt = ClipboardEvent::create(eventType, true, true, dataTransfer);
486 target->dispatchEvent(evt, IGNORE_EXCEPTION);
487 bool noDefaultProcessing = evt->defaultPrevented();
488 if (noDefaultProcessing && policy == DataTransferWritable) {
489 RefPtrWillBeRawPtr<DataObject> dataObject = dataTransfer->dataObject();
490 Pasteboard::generalPasteboard()->writeDataObject(dataObject.release());
491 }
492
493 // invalidate clipboard here for security
494 dataTransfer->setAccessPolicy(DataTransferNumb);
495
496 return !noDefaultProcessing;
497 }
498
canSmartReplaceWithPasteboard(Pasteboard * pasteboard)499 bool Editor::canSmartReplaceWithPasteboard(Pasteboard* pasteboard)
500 {
501 return smartInsertDeleteEnabled() && pasteboard->canSmartReplace();
502 }
503
replaceSelectionWithFragment(PassRefPtrWillBeRawPtr<DocumentFragment> fragment,bool selectReplacement,bool smartReplace,bool matchStyle)504 void Editor::replaceSelectionWithFragment(PassRefPtrWillBeRawPtr<DocumentFragment> fragment, bool selectReplacement, bool smartReplace, bool matchStyle)
505 {
506 if (frame().selection().isNone() || !frame().selection().isContentEditable() || !fragment)
507 return;
508
509 ReplaceSelectionCommand::CommandOptions options = ReplaceSelectionCommand::PreventNesting | ReplaceSelectionCommand::SanitizeFragment;
510 if (selectReplacement)
511 options |= ReplaceSelectionCommand::SelectReplacement;
512 if (smartReplace)
513 options |= ReplaceSelectionCommand::SmartReplace;
514 if (matchStyle)
515 options |= ReplaceSelectionCommand::MatchStyle;
516 ASSERT(frame().document());
517 ReplaceSelectionCommand::create(*frame().document(), fragment, options, EditActionPaste)->apply();
518 revealSelectionAfterEditingOperation();
519
520 if (frame().selection().isInPasswordField() || !spellChecker().isContinuousSpellCheckingEnabled())
521 return;
522 spellChecker().chunkAndMarkAllMisspellingsAndBadGrammar(frame().selection().rootEditableElement());
523 }
524
replaceSelectionWithText(const String & text,bool selectReplacement,bool smartReplace)525 void Editor::replaceSelectionWithText(const String& text, bool selectReplacement, bool smartReplace)
526 {
527 replaceSelectionWithFragment(createFragmentFromText(selectedRange().get(), text), selectReplacement, smartReplace, true);
528 }
529
selectedRange()530 PassRefPtrWillBeRawPtr<Range> Editor::selectedRange()
531 {
532 return frame().selection().toNormalizedRange();
533 }
534
shouldDeleteRange(Range * range) const535 bool Editor::shouldDeleteRange(Range* range) const
536 {
537 if (!range || range->collapsed())
538 return false;
539
540 return canDeleteRange(range);
541 }
542
notifyComponentsOnChangedSelection(const VisibleSelection & oldSelection,FrameSelection::SetSelectionOptions options)543 void Editor::notifyComponentsOnChangedSelection(const VisibleSelection& oldSelection, FrameSelection::SetSelectionOptions options)
544 {
545 client().respondToChangedSelection(m_frame, frame().selection().selectionType());
546 setStartNewKillRingSequence(true);
547 }
548
respondToChangedContents(const VisibleSelection & endingSelection)549 void Editor::respondToChangedContents(const VisibleSelection& endingSelection)
550 {
551 if (frame().settings() && frame().settings()->accessibilityEnabled()) {
552 Node* node = endingSelection.start().deprecatedNode();
553 if (AXObjectCache* cache = frame().document()->existingAXObjectCache())
554 cache->postNotification(node, AXObjectCache::AXValueChanged, false);
555 }
556
557 spellChecker().updateMarkersForWordsAffectedByEditing(true);
558 client().respondToChangedContents();
559 }
560
removeFormattingAndStyle()561 void Editor::removeFormattingAndStyle()
562 {
563 ASSERT(frame().document());
564 RemoveFormatCommand::create(*frame().document())->apply();
565 }
566
clearLastEditCommand()567 void Editor::clearLastEditCommand()
568 {
569 m_lastEditCommand.clear();
570 }
571
findEventTargetFrom(const VisibleSelection & selection) const572 Element* Editor::findEventTargetFrom(const VisibleSelection& selection) const
573 {
574 Element* target = selection.start().element();
575 if (!target)
576 target = frame().document()->body();
577
578 return target;
579 }
580
findEventTargetFromSelection() const581 Element* Editor::findEventTargetFromSelection() const
582 {
583 return findEventTargetFrom(frame().selection().selection());
584 }
585
applyStyle(StylePropertySet * style,EditAction editingAction)586 void Editor::applyStyle(StylePropertySet* style, EditAction editingAction)
587 {
588 switch (frame().selection().selectionType()) {
589 case NoSelection:
590 // do nothing
591 break;
592 case CaretSelection:
593 computeAndSetTypingStyle(style, editingAction);
594 break;
595 case RangeSelection:
596 if (style) {
597 ASSERT(frame().document());
598 ApplyStyleCommand::create(*frame().document(), EditingStyle::create(style).get(), editingAction)->apply();
599 }
600 break;
601 }
602 }
603
applyParagraphStyle(StylePropertySet * style,EditAction editingAction)604 void Editor::applyParagraphStyle(StylePropertySet* style, EditAction editingAction)
605 {
606 if (frame().selection().isNone() || !style)
607 return;
608 ASSERT(frame().document());
609 ApplyStyleCommand::create(*frame().document(), EditingStyle::create(style).get(), editingAction, ApplyStyleCommand::ForceBlockProperties)->apply();
610 }
611
applyStyleToSelection(StylePropertySet * style,EditAction editingAction)612 void Editor::applyStyleToSelection(StylePropertySet* style, EditAction editingAction)
613 {
614 if (!style || style->isEmpty() || !canEditRichly())
615 return;
616
617 applyStyle(style, editingAction);
618 }
619
applyParagraphStyleToSelection(StylePropertySet * style,EditAction editingAction)620 void Editor::applyParagraphStyleToSelection(StylePropertySet* style, EditAction editingAction)
621 {
622 if (!style || style->isEmpty() || !canEditRichly())
623 return;
624
625 applyParagraphStyle(style, editingAction);
626 }
627
selectionStartHasStyle(CSSPropertyID propertyID,const String & value) const628 bool Editor::selectionStartHasStyle(CSSPropertyID propertyID, const String& value) const
629 {
630 return EditingStyle::create(propertyID, value)->triStateOfStyle(
631 EditingStyle::styleAtSelectionStart(frame().selection().selection(), propertyID == CSSPropertyBackgroundColor).get());
632 }
633
selectionHasStyle(CSSPropertyID propertyID,const String & value) const634 TriState Editor::selectionHasStyle(CSSPropertyID propertyID, const String& value) const
635 {
636 return EditingStyle::create(propertyID, value)->triStateOfStyle(frame().selection().selection());
637 }
638
selectionStartCSSPropertyValue(CSSPropertyID propertyID)639 String Editor::selectionStartCSSPropertyValue(CSSPropertyID propertyID)
640 {
641 RefPtrWillBeRawPtr<EditingStyle> selectionStyle = EditingStyle::styleAtSelectionStart(frame().selection().selection(),
642 propertyID == CSSPropertyBackgroundColor);
643 if (!selectionStyle || !selectionStyle->style())
644 return String();
645
646 if (propertyID == CSSPropertyFontSize)
647 return String::number(selectionStyle->legacyFontSize(frame().document()));
648 return selectionStyle->style()->getPropertyValue(propertyID);
649 }
650
dispatchEditableContentChangedEvents(PassRefPtrWillBeRawPtr<Element> startRoot,PassRefPtrWillBeRawPtr<Element> endRoot)651 static void dispatchEditableContentChangedEvents(PassRefPtrWillBeRawPtr<Element> startRoot, PassRefPtrWillBeRawPtr<Element> endRoot)
652 {
653 if (startRoot)
654 startRoot->dispatchEvent(Event::create(EventTypeNames::webkitEditableContentChanged), IGNORE_EXCEPTION);
655 if (endRoot && endRoot != startRoot)
656 endRoot->dispatchEvent(Event::create(EventTypeNames::webkitEditableContentChanged), IGNORE_EXCEPTION);
657 }
658
appliedEditing(PassRefPtrWillBeRawPtr<CompositeEditCommand> cmd)659 void Editor::appliedEditing(PassRefPtrWillBeRawPtr<CompositeEditCommand> cmd)
660 {
661 EventQueueScope scope;
662 frame().document()->updateLayout();
663
664 EditCommandComposition* composition = cmd->composition();
665 ASSERT(composition);
666 dispatchEditableContentChangedEvents(composition->startingRootEditableElement(), composition->endingRootEditableElement());
667 VisibleSelection newSelection(cmd->endingSelection());
668
669 // Don't clear the typing style with this selection change. We do those things elsewhere if necessary.
670 changeSelectionAfterCommand(newSelection, 0);
671
672 if (!cmd->preservesTypingStyle())
673 frame().selection().clearTypingStyle();
674
675 // Command will be equal to last edit command only in the case of typing
676 if (m_lastEditCommand.get() == cmd) {
677 ASSERT(cmd->isTypingCommand());
678 } else {
679 // Only register a new undo command if the command passed in is
680 // different from the last command
681 m_lastEditCommand = cmd;
682 if (UndoStack* undoStack = this->undoStack())
683 undoStack->registerUndoStep(m_lastEditCommand->ensureComposition());
684 }
685
686 respondToChangedContents(newSelection);
687 }
688
unappliedEditing(PassRefPtrWillBeRawPtr<EditCommandComposition> cmd)689 void Editor::unappliedEditing(PassRefPtrWillBeRawPtr<EditCommandComposition> cmd)
690 {
691 EventQueueScope scope;
692 frame().document()->updateLayout();
693
694 dispatchEditableContentChangedEvents(cmd->startingRootEditableElement(), cmd->endingRootEditableElement());
695
696 VisibleSelection newSelection(cmd->startingSelection());
697 newSelection.validatePositionsIfNeeded();
698 if (newSelection.start().document() == frame().document() && newSelection.end().document() == frame().document())
699 changeSelectionAfterCommand(newSelection, FrameSelection::CloseTyping | FrameSelection::ClearTypingStyle);
700
701 m_lastEditCommand = nullptr;
702 if (UndoStack* undoStack = this->undoStack())
703 undoStack->registerRedoStep(cmd);
704 respondToChangedContents(newSelection);
705 }
706
reappliedEditing(PassRefPtrWillBeRawPtr<EditCommandComposition> cmd)707 void Editor::reappliedEditing(PassRefPtrWillBeRawPtr<EditCommandComposition> cmd)
708 {
709 EventQueueScope scope;
710 frame().document()->updateLayout();
711
712 dispatchEditableContentChangedEvents(cmd->startingRootEditableElement(), cmd->endingRootEditableElement());
713
714 VisibleSelection newSelection(cmd->endingSelection());
715 changeSelectionAfterCommand(newSelection, FrameSelection::CloseTyping | FrameSelection::ClearTypingStyle);
716
717 m_lastEditCommand = nullptr;
718 if (UndoStack* undoStack = this->undoStack())
719 undoStack->registerUndoStep(cmd);
720 respondToChangedContents(newSelection);
721 }
722
create(LocalFrame & frame)723 PassOwnPtrWillBeRawPtr<Editor> Editor::create(LocalFrame& frame)
724 {
725 return adoptPtrWillBeNoop(new Editor(frame));
726 }
727
Editor(LocalFrame & frame)728 Editor::Editor(LocalFrame& frame)
729 : m_frame(&frame)
730 , m_preventRevealSelection(0)
731 , m_shouldStartNewKillRingSequence(false)
732 // This is off by default, since most editors want this behavior (this matches IE but not FF).
733 , m_shouldStyleWithCSS(false)
734 , m_killRing(adoptPtr(new KillRing))
735 , m_areMarkedTextMatchesHighlighted(false)
736 , m_defaultParagraphSeparator(EditorParagraphSeparatorIsDiv)
737 , m_overwriteModeEnabled(false)
738 {
739 }
740
~Editor()741 Editor::~Editor()
742 {
743 }
744
clear()745 void Editor::clear()
746 {
747 frame().inputMethodController().clear();
748 m_shouldStyleWithCSS = false;
749 m_defaultParagraphSeparator = EditorParagraphSeparatorIsDiv;
750 }
751
insertText(const String & text,KeyboardEvent * triggeringEvent)752 bool Editor::insertText(const String& text, KeyboardEvent* triggeringEvent)
753 {
754 return frame().eventHandler().handleTextInputEvent(text, triggeringEvent);
755 }
756
insertTextWithoutSendingTextEvent(const String & text,bool selectInsertedText,TextEvent * triggeringEvent)757 bool Editor::insertTextWithoutSendingTextEvent(const String& text, bool selectInsertedText, TextEvent* triggeringEvent)
758 {
759 if (text.isEmpty())
760 return false;
761
762 VisibleSelection selection = selectionForCommand(triggeringEvent);
763 if (!selection.isContentEditable())
764 return false;
765
766 spellChecker().updateMarkersForWordsAffectedByEditing(isSpaceOrNewline(text[0]));
767
768 // Get the selection to use for the event that triggered this insertText.
769 // If the event handler changed the selection, we may want to use a different selection
770 // that is contained in the event target.
771 selection = selectionForCommand(triggeringEvent);
772 if (selection.isContentEditable()) {
773 if (Node* selectionStart = selection.start().deprecatedNode()) {
774 RefPtrWillBeRawPtr<Document> document(selectionStart->document());
775
776 // Insert the text
777 TypingCommand::Options options = 0;
778 if (selectInsertedText)
779 options |= TypingCommand::SelectInsertedText;
780 TypingCommand::insertText(*document.get(), text, selection, options, triggeringEvent && triggeringEvent->isComposition() ? TypingCommand::TextCompositionConfirm : TypingCommand::TextCompositionNone);
781
782 // Reveal the current selection
783 if (LocalFrame* editedFrame = document->frame()) {
784 if (Page* page = editedFrame->page())
785 toLocalFrame(page->focusController().focusedOrMainFrame())->selection().revealSelection(ScrollAlignment::alignCenterIfNeeded);
786 }
787 }
788 }
789
790 return true;
791 }
792
insertLineBreak()793 bool Editor::insertLineBreak()
794 {
795 if (!canEdit())
796 return false;
797
798 VisiblePosition caret = frame().selection().selection().visibleStart();
799 bool alignToEdge = isEndOfEditableOrNonEditableContent(caret);
800 ASSERT(frame().document());
801 TypingCommand::insertLineBreak(*frame().document(), 0);
802 revealSelectionAfterEditingOperation(alignToEdge ? ScrollAlignment::alignToEdgeIfNeeded : ScrollAlignment::alignCenterIfNeeded);
803
804 return true;
805 }
806
insertParagraphSeparator()807 bool Editor::insertParagraphSeparator()
808 {
809 if (!canEdit())
810 return false;
811
812 if (!canEditRichly())
813 return insertLineBreak();
814
815 VisiblePosition caret = frame().selection().selection().visibleStart();
816 bool alignToEdge = isEndOfEditableOrNonEditableContent(caret);
817 ASSERT(frame().document());
818 TypingCommand::insertParagraphSeparator(*frame().document(), 0);
819 revealSelectionAfterEditingOperation(alignToEdge ? ScrollAlignment::alignToEdgeIfNeeded : ScrollAlignment::alignCenterIfNeeded);
820
821 return true;
822 }
823
cut()824 void Editor::cut()
825 {
826 if (tryDHTMLCut())
827 return; // DHTML did the whole operation
828 if (!canCut())
829 return;
830 RefPtrWillBeRawPtr<Range> selection = selectedRange();
831 if (shouldDeleteRange(selection.get())) {
832 spellChecker().updateMarkersForWordsAffectedByEditing(true);
833 String plainText = frame().selectedTextForClipboard();
834 if (enclosingTextFormControl(frame().selection().start())) {
835 Pasteboard::generalPasteboard()->writePlainText(plainText,
836 canSmartCopyOrDelete() ? Pasteboard::CanSmartReplace : Pasteboard::CannotSmartReplace);
837 } else {
838 writeSelectionToPasteboard(Pasteboard::generalPasteboard(), selection.get(), plainText);
839 }
840 deleteSelectionWithSmartDelete(canSmartCopyOrDelete());
841 }
842 }
843
copy()844 void Editor::copy()
845 {
846 if (tryDHTMLCopy())
847 return; // DHTML did the whole operation
848 if (!canCopy())
849 return;
850 if (enclosingTextFormControl(frame().selection().start())) {
851 Pasteboard::generalPasteboard()->writePlainText(frame().selectedTextForClipboard(),
852 canSmartCopyOrDelete() ? Pasteboard::CanSmartReplace : Pasteboard::CannotSmartReplace);
853 } else {
854 Document* document = frame().document();
855 if (HTMLImageElement* imageElement = imageElementFromImageDocument(document))
856 writeImageNodeToPasteboard(Pasteboard::generalPasteboard(), imageElement, document->title());
857 else
858 writeSelectionToPasteboard(Pasteboard::generalPasteboard(), selectedRange().get(), frame().selectedTextForClipboard());
859 }
860 }
861
paste()862 void Editor::paste()
863 {
864 ASSERT(frame().document());
865 if (tryDHTMLPaste(AllMimeTypes))
866 return; // DHTML did the whole operation
867 if (!canPaste())
868 return;
869 spellChecker().updateMarkersForWordsAffectedByEditing(false);
870 ResourceFetcher* loader = frame().document()->fetcher();
871 ResourceCacheValidationSuppressor validationSuppressor(loader);
872 if (frame().selection().isContentRichlyEditable())
873 pasteWithPasteboard(Pasteboard::generalPasteboard());
874 else
875 pasteAsPlainTextWithPasteboard(Pasteboard::generalPasteboard());
876 }
877
pasteAsPlainText()878 void Editor::pasteAsPlainText()
879 {
880 if (tryDHTMLPaste(PlainTextOnly))
881 return;
882 if (!canPaste())
883 return;
884 spellChecker().updateMarkersForWordsAffectedByEditing(false);
885 pasteAsPlainTextWithPasteboard(Pasteboard::generalPasteboard());
886 }
887
performDelete()888 void Editor::performDelete()
889 {
890 if (!canDelete())
891 return;
892 addToKillRing(selectedRange().get(), false);
893 deleteSelectionWithSmartDelete(canSmartCopyOrDelete());
894
895 // clear the "start new kill ring sequence" setting, because it was set to true
896 // when the selection was updated by deleting the range
897 setStartNewKillRingSequence(false);
898 }
899
countEditingEvent(ExecutionContext * executionContext,const Event * event,UseCounter::Feature featureOnInput,UseCounter::Feature featureOnTextArea,UseCounter::Feature featureOnContentEditable,UseCounter::Feature featureOnNonNode)900 static void countEditingEvent(ExecutionContext* executionContext, const Event* event, UseCounter::Feature featureOnInput, UseCounter::Feature featureOnTextArea, UseCounter::Feature featureOnContentEditable, UseCounter::Feature featureOnNonNode)
901 {
902 EventTarget* eventTarget = event->target();
903 Node* node = eventTarget->toNode();
904 if (!node) {
905 UseCounter::count(executionContext, featureOnNonNode);
906 return;
907 }
908
909 if (isHTMLInputElement(node)) {
910 UseCounter::count(executionContext, featureOnInput);
911 return;
912 }
913
914 if (isHTMLTextAreaElement(node)) {
915 UseCounter::count(executionContext, featureOnTextArea);
916 return;
917 }
918
919 HTMLTextFormControlElement* control = enclosingTextFormControl(node);
920 if (isHTMLInputElement(control)) {
921 UseCounter::count(executionContext, featureOnInput);
922 return;
923 }
924
925 if (isHTMLTextAreaElement(control)) {
926 UseCounter::count(executionContext, featureOnTextArea);
927 return;
928 }
929
930 UseCounter::count(executionContext, featureOnContentEditable);
931 }
932
countEvent(ExecutionContext * executionContext,const Event * event)933 void Editor::countEvent(ExecutionContext* executionContext, const Event* event)
934 {
935 if (!executionContext)
936 return;
937
938 if (event->type() == EventTypeNames::textInput) {
939 countEditingEvent(executionContext, event,
940 UseCounter::TextInputEventOnInput,
941 UseCounter::TextInputEventOnTextArea,
942 UseCounter::TextInputEventOnContentEditable,
943 UseCounter::TextInputEventOnNotNode);
944 return;
945 }
946
947 if (event->type() == EventTypeNames::webkitBeforeTextInserted) {
948 countEditingEvent(executionContext, event,
949 UseCounter::WebkitBeforeTextInsertedOnInput,
950 UseCounter::WebkitBeforeTextInsertedOnTextArea,
951 UseCounter::WebkitBeforeTextInsertedOnContentEditable,
952 UseCounter::WebkitBeforeTextInsertedOnNotNode);
953 return;
954 }
955
956 if (event->type() == EventTypeNames::webkitEditableContentChanged) {
957 countEditingEvent(executionContext, event,
958 UseCounter::WebkitEditableContentChangedOnInput,
959 UseCounter::WebkitEditableContentChangedOnTextArea,
960 UseCounter::WebkitEditableContentChangedOnContentEditable,
961 UseCounter::WebkitEditableContentChangedOnNotNode);
962 }
963 }
964
copyImage(const HitTestResult & result)965 void Editor::copyImage(const HitTestResult& result)
966 {
967 writeImageNodeToPasteboard(Pasteboard::generalPasteboard(), result.innerNonSharedNode(), result.altDisplayString());
968 }
969
canUndo()970 bool Editor::canUndo()
971 {
972 if (UndoStack* undoStack = this->undoStack())
973 return undoStack->canUndo();
974 return false;
975 }
976
undo()977 void Editor::undo()
978 {
979 if (UndoStack* undoStack = this->undoStack())
980 undoStack->undo();
981 }
982
canRedo()983 bool Editor::canRedo()
984 {
985 if (UndoStack* undoStack = this->undoStack())
986 return undoStack->canRedo();
987 return false;
988 }
989
redo()990 void Editor::redo()
991 {
992 if (UndoStack* undoStack = this->undoStack())
993 undoStack->redo();
994 }
995
setBaseWritingDirection(WritingDirection direction)996 void Editor::setBaseWritingDirection(WritingDirection direction)
997 {
998 Element* focusedElement = frame().document()->focusedElement();
999 if (isHTMLTextFormControlElement(focusedElement)) {
1000 if (direction == NaturalWritingDirection)
1001 return;
1002 focusedElement->setAttribute(dirAttr, direction == LeftToRightWritingDirection ? "ltr" : "rtl");
1003 focusedElement->dispatchInputEvent();
1004 frame().document()->updateRenderTreeIfNeeded();
1005 return;
1006 }
1007
1008 RefPtrWillBeRawPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
1009 style->setProperty(CSSPropertyDirection, direction == LeftToRightWritingDirection ? "ltr" : direction == RightToLeftWritingDirection ? "rtl" : "inherit", false);
1010 applyParagraphStyleToSelection(style.get(), EditActionSetWritingDirection);
1011 }
1012
revealSelectionAfterEditingOperation(const ScrollAlignment & alignment,RevealExtentOption revealExtentOption)1013 void Editor::revealSelectionAfterEditingOperation(const ScrollAlignment& alignment, RevealExtentOption revealExtentOption)
1014 {
1015 if (m_preventRevealSelection)
1016 return;
1017
1018 frame().selection().revealSelection(alignment, revealExtentOption);
1019 }
1020
transpose()1021 void Editor::transpose()
1022 {
1023 if (!canEdit())
1024 return;
1025
1026 VisibleSelection selection = frame().selection().selection();
1027 if (!selection.isCaret())
1028 return;
1029
1030 // Make a selection that goes back one character and forward two characters.
1031 VisiblePosition caret = selection.visibleStart();
1032 VisiblePosition next = isEndOfParagraph(caret) ? caret : caret.next();
1033 VisiblePosition previous = next.previous();
1034 if (next == previous)
1035 return;
1036 previous = previous.previous();
1037 if (!inSameParagraph(next, previous))
1038 return;
1039 RefPtrWillBeRawPtr<Range> range = makeRange(previous, next);
1040 if (!range)
1041 return;
1042 VisibleSelection newSelection(range.get(), DOWNSTREAM);
1043
1044 // Transpose the two characters.
1045 String text = plainText(range.get());
1046 if (text.length() != 2)
1047 return;
1048 String transposed = text.right(1) + text.left(1);
1049
1050 // Select the two characters.
1051 if (newSelection != frame().selection().selection())
1052 frame().selection().setSelection(newSelection);
1053
1054 // Insert the transposed characters.
1055 replaceSelectionWithText(transposed, false, false);
1056 }
1057
addToKillRing(Range * range,bool prepend)1058 void Editor::addToKillRing(Range* range, bool prepend)
1059 {
1060 if (m_shouldStartNewKillRingSequence)
1061 killRing().startNewSequence();
1062
1063 String text = plainText(range);
1064 if (prepend)
1065 killRing().prepend(text);
1066 else
1067 killRing().append(text);
1068 m_shouldStartNewKillRingSequence = false;
1069 }
1070
changeSelectionAfterCommand(const VisibleSelection & newSelection,FrameSelection::SetSelectionOptions options)1071 void Editor::changeSelectionAfterCommand(const VisibleSelection& newSelection, FrameSelection::SetSelectionOptions options)
1072 {
1073 // If the new selection is orphaned, then don't update the selection.
1074 if (newSelection.start().isOrphan() || newSelection.end().isOrphan())
1075 return;
1076
1077 // See <rdar://problem/5729315> Some shouldChangeSelectedDOMRange contain Ranges for selections that are no longer valid
1078 bool selectionDidNotChangeDOMPosition = newSelection == frame().selection().selection();
1079 frame().selection().setSelection(newSelection, options);
1080
1081 // Some editing operations change the selection visually without affecting its position within the DOM.
1082 // For example when you press return in the following (the caret is marked by ^):
1083 // <div contentEditable="true"><div>^Hello</div></div>
1084 // WebCore inserts <div><br></div> *before* the current block, which correctly moves the paragraph down but which doesn't
1085 // change the caret's DOM position (["hello", 0]). In these situations the above FrameSelection::setSelection call
1086 // does not call EditorClient::respondToChangedSelection(), which, on the Mac, sends selection change notifications and
1087 // starts a new kill ring sequence, but we want to do these things (matches AppKit).
1088 if (selectionDidNotChangeDOMPosition)
1089 client().respondToChangedSelection(m_frame, frame().selection().selectionType());
1090 }
1091
firstRectForRange(Range * range) const1092 IntRect Editor::firstRectForRange(Range* range) const
1093 {
1094 LayoutUnit extraWidthToEndOfLine = 0;
1095 ASSERT(range->startContainer());
1096 ASSERT(range->endContainer());
1097
1098 IntRect startCaretRect = RenderedPosition(VisiblePosition(range->startPosition()).deepEquivalent(), DOWNSTREAM).absoluteRect(&extraWidthToEndOfLine);
1099 if (startCaretRect == LayoutRect())
1100 return IntRect();
1101
1102 IntRect endCaretRect = RenderedPosition(VisiblePosition(range->endPosition()).deepEquivalent(), UPSTREAM).absoluteRect();
1103 if (endCaretRect == LayoutRect())
1104 return IntRect();
1105
1106 if (startCaretRect.y() == endCaretRect.y()) {
1107 // start and end are on the same line
1108 return IntRect(std::min(startCaretRect.x(), endCaretRect.x()),
1109 startCaretRect.y(),
1110 abs(endCaretRect.x() - startCaretRect.x()),
1111 std::max(startCaretRect.height(), endCaretRect.height()));
1112 }
1113
1114 // start and end aren't on the same line, so go from start to the end of its line
1115 return IntRect(startCaretRect.x(),
1116 startCaretRect.y(),
1117 startCaretRect.width() + extraWidthToEndOfLine,
1118 startCaretRect.height());
1119 }
1120
computeAndSetTypingStyle(StylePropertySet * style,EditAction editingAction)1121 void Editor::computeAndSetTypingStyle(StylePropertySet* style, EditAction editingAction)
1122 {
1123 if (!style || style->isEmpty()) {
1124 frame().selection().clearTypingStyle();
1125 return;
1126 }
1127
1128 // Calculate the current typing style.
1129 RefPtrWillBeRawPtr<EditingStyle> typingStyle = nullptr;
1130 if (frame().selection().typingStyle()) {
1131 typingStyle = frame().selection().typingStyle()->copy();
1132 typingStyle->overrideWithStyle(style);
1133 } else {
1134 typingStyle = EditingStyle::create(style);
1135 }
1136
1137 typingStyle->prepareToApplyAt(frame().selection().selection().visibleStart().deepEquivalent(), EditingStyle::PreserveWritingDirection);
1138
1139 // Handle block styles, substracting these from the typing style.
1140 RefPtrWillBeRawPtr<EditingStyle> blockStyle = typingStyle->extractAndRemoveBlockProperties();
1141 if (!blockStyle->isEmpty()) {
1142 ASSERT(frame().document());
1143 ApplyStyleCommand::create(*frame().document(), blockStyle.get(), editingAction)->apply();
1144 }
1145
1146 // Set the remaining style as the typing style.
1147 frame().selection().setTypingStyle(typingStyle);
1148 }
1149
findString(const String & target,bool forward,bool caseFlag,bool wrapFlag,bool startInSelection)1150 bool Editor::findString(const String& target, bool forward, bool caseFlag, bool wrapFlag, bool startInSelection)
1151 {
1152 FindOptions options = (forward ? 0 : Backwards) | (caseFlag ? 0 : CaseInsensitive) | (wrapFlag ? WrapAround : 0) | (startInSelection ? StartInSelection : 0);
1153 return findString(target, options);
1154 }
1155
findString(const String & target,FindOptions options)1156 bool Editor::findString(const String& target, FindOptions options)
1157 {
1158 VisibleSelection selection = frame().selection().selection();
1159
1160 RefPtrWillBeRawPtr<Range> resultRange = rangeOfString(target, selection.firstRange().get(), options);
1161
1162 if (!resultRange)
1163 return false;
1164
1165 frame().selection().setSelection(VisibleSelection(resultRange.get(), DOWNSTREAM));
1166 frame().selection().revealSelection();
1167 return true;
1168 }
1169
findStringAndScrollToVisible(const String & target,Range * previousMatch,FindOptions options)1170 PassRefPtrWillBeRawPtr<Range> Editor::findStringAndScrollToVisible(const String& target, Range* previousMatch, FindOptions options)
1171 {
1172 RefPtrWillBeRawPtr<Range> nextMatch = rangeOfString(target, previousMatch, options);
1173 if (!nextMatch)
1174 return nullptr;
1175
1176 nextMatch->firstNode()->renderer()->scrollRectToVisible(nextMatch->boundingBox(),
1177 ScrollAlignment::alignCenterIfNeeded, ScrollAlignment::alignCenterIfNeeded);
1178
1179 return nextMatch.release();
1180 }
1181
findStringBetweenPositions(const String & target,const Position & start,const Position & end,FindOptions options)1182 static PassRefPtrWillBeRawPtr<Range> findStringBetweenPositions(const String& target, const Position& start, const Position& end, FindOptions options)
1183 {
1184 Position searchStart(start);
1185 Position searchEnd(end);
1186
1187 bool forward = !(options & Backwards);
1188
1189 while (true) {
1190 Position resultStart;
1191 Position resultEnd;
1192 findPlainText(searchStart, searchEnd, target, options, resultStart, resultEnd);
1193 if (resultStart == resultEnd)
1194 return nullptr;
1195
1196 RefPtrWillBeRawPtr<Range> resultRange = Range::create(*resultStart.document(), resultStart, resultEnd);
1197 if (!resultRange->collapsed())
1198 return resultRange.release();
1199
1200 // Found text spans over multiple TreeScopes. Since it's impossible to return such section as a Range,
1201 // we skip this match and seek for the next occurrence.
1202 // FIXME: Handle this case.
1203 if (forward)
1204 searchStart = resultStart.next();
1205 else
1206 searchEnd = resultEnd.previous();
1207 }
1208
1209 ASSERT_NOT_REACHED();
1210 return nullptr;
1211 }
1212
rangeOfString(const String & target,Range * referenceRange,FindOptions options)1213 PassRefPtrWillBeRawPtr<Range> Editor::rangeOfString(const String& target, Range* referenceRange, FindOptions options)
1214 {
1215 if (target.isEmpty())
1216 return nullptr;
1217
1218 // Start from an edge of the reference range. Which edge is used depends on whether we're searching forward or
1219 // backward, and whether startInSelection is set.
1220 Position searchStart = firstPositionInNode(frame().document());
1221 Position searchEnd = lastPositionInNode(frame().document());
1222
1223 bool forward = !(options & Backwards);
1224 bool startInReferenceRange = referenceRange && (options & StartInSelection);
1225 if (referenceRange) {
1226 if (forward)
1227 searchStart = startInReferenceRange ? referenceRange->startPosition() : referenceRange->endPosition();
1228 else
1229 searchEnd = startInReferenceRange ? referenceRange->endPosition() : referenceRange->startPosition();
1230 }
1231
1232 RefPtrWillBeRawPtr<Range> resultRange = findStringBetweenPositions(target, searchStart, searchEnd, options);
1233
1234 // If we started in the reference range and the found range exactly matches the reference range, find again.
1235 // Build a selection with the found range to remove collapsed whitespace.
1236 // Compare ranges instead of selection objects to ignore the way that the current selection was made.
1237 if (resultRange && startInReferenceRange && areRangesEqual(VisibleSelection(resultRange.get()).toNormalizedRange().get(), referenceRange)) {
1238 if (forward)
1239 searchStart = resultRange->endPosition();
1240 else
1241 searchEnd = resultRange->startPosition();
1242 resultRange = findStringBetweenPositions(target, searchStart, searchEnd, options);
1243 }
1244
1245 if (!resultRange && options & WrapAround) {
1246 searchStart = firstPositionInNode(frame().document());
1247 searchEnd = lastPositionInNode(frame().document());
1248 resultRange = findStringBetweenPositions(target, searchStart, searchEnd, options);
1249 }
1250
1251 return resultRange.release();
1252 }
1253
setMarkedTextMatchesAreHighlighted(bool flag)1254 void Editor::setMarkedTextMatchesAreHighlighted(bool flag)
1255 {
1256 if (flag == m_areMarkedTextMatchesHighlighted)
1257 return;
1258
1259 m_areMarkedTextMatchesHighlighted = flag;
1260 frame().document()->markers().repaintMarkers(DocumentMarker::TextMatch);
1261 }
1262
respondToChangedSelection(const VisibleSelection & oldSelection,FrameSelection::SetSelectionOptions options)1263 void Editor::respondToChangedSelection(const VisibleSelection& oldSelection, FrameSelection::SetSelectionOptions options)
1264 {
1265 spellChecker().respondToChangedSelection(oldSelection, options);
1266 frame().inputMethodController().cancelCompositionIfSelectionIsInvalid();
1267 notifyComponentsOnChangedSelection(oldSelection, options);
1268 }
1269
spellChecker() const1270 SpellChecker& Editor::spellChecker() const
1271 {
1272 return frame().spellChecker();
1273 }
1274
toggleOverwriteModeEnabled()1275 void Editor::toggleOverwriteModeEnabled()
1276 {
1277 m_overwriteModeEnabled = !m_overwriteModeEnabled;
1278 frame().selection().setShouldShowBlockCursor(m_overwriteModeEnabled);
1279 }
1280
trace(Visitor * visitor)1281 void Editor::trace(Visitor* visitor)
1282 {
1283 visitor->trace(m_frame);
1284 visitor->trace(m_lastEditCommand);
1285 visitor->trace(m_mark);
1286 }
1287
1288 } // namespace blink
1289