WebCore/editing/Editor.cpp

   1 /*
   2  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
   3  * Copyright (C) 2007 Trolltech ASA
   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 "Editor.h"
  29
  30 #include "AXObjectCache.h"
  31 #include "ApplyStyleCommand.h"
  32 #include "CSSComputedStyleDeclaration.h"
  33 #include "CSSProperty.h"
  34 #include "CSSPropertyNames.h"
  35 #include "CharacterData.h"
  36 #include "Clipboard.h"
  37 #include "ClipboardEvent.h"
  38 #include "DeleteButtonController.h"
  39 #include "DeleteSelectionCommand.h"
  40 #include "DocLoader.h"
  41 #include "Document.h"
  42 #include "DocumentFragment.h"
  43 #include "EditCommand.h"
  44 #include "Editor.h"
  45 #include "EditorClient.h"
  46 #include "Event.h"
  47 #include "EventHandler.h"
  48 #include "EventNames.h"
  49 #include "FocusController.h"
  50 #include "FontData.h"
  51 #include "HTMLElement.h"
  52 #include "HTMLInputElement.h"
  53 #include "HTMLNames.h"
  54 #include "HTMLTextAreaElement.h"
  55 #include "HitTestResult.h"
  56 #include "IndentOutdentCommand.h"
  57 #include "KeyboardEvent.h"
  58 #include "KURL.h"
  59 #include "Page.h"
  60 #include "Pasteboard.h"
  61 #include "Range.h"
  62 #include "ReplaceSelectionCommand.h"
  63 #include "SelectionController.h"
  64 #include "Sound.h"
  65 #include "TextIterator.h"
  66 #include "TypingCommand.h"
  67 #include "htmlediting.h"
  68 #include "markup.h"
  69
  70 namespace WebCore {
  71
  72 using namespace EventNames;
  73 using namespace HTMLNames;
  74
  75 // When an event handler has moved the selection outside of a text control
  76 // we should use the target control's selection for this editing operation.
  77 static Selection selectionForEvent(Frame* frame, Event* event)
  78 {
  79     Page* page = frame->page();
  80     if (!page)
  81         return Selection();
  82     Selection selection = page->selection();
  83     if (!event)
  84         return selection;
  85     Node* target = event->target()->toNode();
  86     Node* selectionStart = selection.start().node();
  87
  88     // If the target is a text control, and the current selection is outside of its shadow tree,
  89     // then use the saved selection for that text control.
  90     if (target && (!selectionStart || target->shadowAncestorNode() != selectionStart->shadowAncestorNode())) {
  91         if (target->hasTagName(inputTag) && static_cast<HTMLInputElement*>(target)->isTextField())
  92             return static_cast<HTMLInputElement*>(target)->selection();
  93         if (target->hasTagName(textareaTag))
  94             return static_cast<HTMLTextAreaElement*>(target)->selection();
  95     }
  96     return selection;
  97 }
  98
  99 EditorClient* Editor::client() const
 100 {
 101     if (Page* page = m_frame->page())
 102         return page->editorClient();
 103     return 0;
 104 }
 105
 106 void Editor::handleKeypress(KeyboardEvent* event)
 107 {
 108     if (EditorClient* c = client())
 109         if (selectionForEvent(m_frame, event).isContentEditable())
 110             c->handleKeypress(event);
 111 }
 112
 113 void Editor::handleInputMethodKeypress(KeyboardEvent* event)
 114 {
 115     if (EditorClient* c = client())
 116         if (selectionForEvent(m_frame, event).isContentEditable())
 117             c->handleInputMethodKeypress(event);
 118 }
 119
 120 bool Editor::canEdit() const
 121 {
 122     return m_frame->selectionController()->isContentEditable();
 123 }
 124
 125 bool Editor::canEditRichly() const
 126 {
 127     return m_frame->selectionController()->isContentRichlyEditable();
 128 }
 129
 130 // WinIE uses onbeforecut and onbeforepaste to enables the cut and paste menu items.  They
 131 // also send onbeforecopy, apparently for symmetry, but it doesn't affect the menu items.
 132 // We need to use onbeforecopy as a real menu enabler because we allow elements that are not
 133 // normally selectable to implement copy/paste (like divs, or a document body).
 134
 135 bool Editor::canDHTMLCut()
 136 {
 137     return !m_frame->selectionController()->isInPasswordField() && !dispatchCPPEvent(beforecutEvent, ClipboardNumb);
 138 }
 139
 140 bool Editor::canDHTMLCopy()
 141 {
 142     return !m_frame->selectionController()->isInPasswordField() && !dispatchCPPEvent(beforecopyEvent, ClipboardNumb);
 143 }
 144
 145 bool Editor::canDHTMLPaste()
 146 {
 147     return !dispatchCPPEvent(beforepasteEvent, ClipboardNumb);
 148 }
 149
 150 bool Editor::canCut() const
 151 {
 152     return canCopy() && canDelete();
 153 }
 154
 155 bool Editor::canCopy() const
 156 {
 157     SelectionController* selectionController = m_frame->selectionController();
 158     return selectionController->isRange() && !selectionController->isInPasswordField();
 159 }
 160
 161 bool Editor::canPaste() const
 162 {
 163     return canEdit();
 164 }
 165
 166 bool Editor::canDelete() const
 167 {
 168     SelectionController* selectionController = m_frame->selectionController();
 169     return selectionController->isRange() && selectionController->isContentEditable();
 170 }
 171
 172 bool Editor::canDeleteRange(Range* range) const
 173 {
 174     ExceptionCode ec = 0;
 175     Node* startContainer = range->startContainer(ec);
 176     Node* endContainer = range->endContainer(ec);
 177     if (!startContainer || !endContainer)
 178         return false;
 179
 180     if (!startContainer->isContentEditable() || !endContainer->isContentEditable())
 181         return false;
 182
 183     if (range->collapsed(ec)) {
 184         VisiblePosition start(startContainer, range->startOffset(ec), DOWNSTREAM);
 185         VisiblePosition previous = start.previous();
 186         // FIXME: We sometimes allow deletions at the start of editable roots, like when the caret is in an empty list item.
 187         if (previous.isNull() || previous.deepEquivalent().node()->rootEditableElement() != startContainer->rootEditableElement())
 188             return false;
 189     }
 190     return true;
 191 }
 192
 193 bool Editor::smartInsertDeleteEnabled()
 194 {
 195     if (client())
 196         return client()->smartInsertDeleteEnabled();
 197     return false;
 198 }
 199
 200 bool Editor::canSmartCopyOrDelete()
 201 {
 202     if (client())
 203         return client()->smartInsertDeleteEnabled() && m_frame->selectionGranularity() == WordGranularity;
 204     return false;
 205 }
 206
 207 void Editor::deleteRange(Range* range, bool killRing, bool prepend, bool smartDeleteOK, EditorDeleteAction deletionAction, TextGranularity granularity)
 208 {
 209     if (killRing)
 210         addToKillRing(range, prepend);
 211
 212     ExceptionCode ec = 0;
 213
 214     SelectionController* selectionController = m_frame->selectionController();
 215     bool smartDelete = smartDeleteOK && canSmartCopyOrDelete();
 216     switch (deletionAction) {
 217         case deleteSelectionAction:
 218             selectionController->setSelectedRange(range, DOWNSTREAM, true, ec);
 219             if (ec)
 220                 return;
 221             deleteSelectionWithSmartDelete(smartDelete);
 222             break;
 223         case deleteKeyAction:
 224             selectionController->setSelectedRange(range, DOWNSTREAM, (granularity != CharacterGranularity), ec);
 225             if (ec)
 226                 return;
 227             if (m_frame->document()) {
 228                 TypingCommand::deleteKeyPressed(m_frame->document(), smartDelete, granularity);
 229                 m_frame->revealSelection(RenderLayer::gAlignToEdgeIfNeeded);
 230             }
 231             break;
 232         case forwardDeleteKeyAction:
 233             selectionController->setSelectedRange(range, DOWNSTREAM, (granularity != CharacterGranularity), ec);
 234             if (ec)
 235                 return;
 236             if (m_frame->document()) {
 237                 TypingCommand::forwardDeleteKeyPressed(m_frame->document(), smartDelete, granularity);
 238                 m_frame->revealSelection(RenderLayer::gAlignToEdgeIfNeeded);
 239             }
 240             break;
 241     }
 242
 243     // clear the "start new kill ring sequence" setting, because it was set to true
 244     // when the selection was updated by deleting the range
 245     if (killRing)
 246         setStartNewKillRingSequence(false);
 247 }
 248
 249 bool Editor::deleteWithDirection(SelectionController::EDirection direction, TextGranularity granularity, bool killRing, bool isTypingAction)
 250 {
 251     // Delete the selection, if there is one.
 252     // If not, make a selection using the passed-in direction and granularity.
 253
 254     if (!canEdit())
 255         return false;
 256
 257     RefPtr<Range> range;
 258     EditorDeleteAction deletionAction = deleteSelectionAction;
 259
 260     bool smartDeleteOK = false;
 261
 262     if (m_frame->selectionController()->isRange()) {
 263         range = selectedRange();
 264         smartDeleteOK = true;
 265         if (isTypingAction)
 266             deletionAction = deleteKeyAction;
 267     } else {
 268         SelectionController selectionController;
 269         selectionController.setSelection(m_frame->selectionController()->selection());
 270         selectionController.modify(SelectionController::EXTEND, direction, granularity);
 271         if (killRing && selectionController.isCaret() && granularity != CharacterGranularity)
 272             selectionController.modify(SelectionController::EXTEND, direction, CharacterGranularity);
 273
 274         range = selectionController.toRange();
 275
 276         switch (direction) {
 277             case SelectionController::FORWARD:
 278             case SelectionController::RIGHT:
 279                 deletionAction = forwardDeleteKeyAction;
 280                 break;
 281             case SelectionController::BACKWARD:
 282             case SelectionController::LEFT:
 283                 deletionAction = deleteKeyAction;
 284                 break;
 285         }
 286     }
 287
 288     deleteRange(range.get(), killRing, false, smartDeleteOK, deletionAction, granularity);
 289
 290     return true;
 291 }
 292
 293 void Editor::deleteSelectionWithSmartDelete()
 294 {
 295     deleteSelectionWithSmartDelete(canSmartCopyOrDelete());
 296 }
 297
 298 void Editor::deleteSelectionWithSmartDelete(bool smartDelete)
 299 {
 300     if (m_frame->selectionController()->isNone())
 301         return;
 302
 303     applyCommand(new DeleteSelectionCommand(m_frame->document(), smartDelete));
 304 }
 305
 306 void Editor::pasteAsPlainTextWithPasteboard(Pasteboard* pasteboard)
 307 {
 308     String text = pasteboard->plainText(m_frame);
 309     if (client() && client()->shouldInsertText(text, selectedRange().get(), EditorInsertActionPasted))
 310         replaceSelectionWithText(text, false, canSmartReplaceWithPasteboard(pasteboard));
 311 }
 312
 313 void Editor::pasteWithPasteboard(Pasteboard* pasteboard, bool allowPlainText)
 314 {
 315     RefPtr<Range> range = selectedRange();
 316     bool chosePlainText;
 317     RefPtr<DocumentFragment> fragment = pasteboard->documentFragment(m_frame, range, allowPlainText, chosePlainText);
 318     if (fragment && shouldInsertFragment(fragment, range, EditorInsertActionPasted))
 319         replaceSelectionWithFragment(fragment, false, canSmartReplaceWithPasteboard(pasteboard), chosePlainText);
 320 }
 321
 322 bool Editor::canSmartReplaceWithPasteboard(Pasteboard* pasteboard)
 323 {
 324     if (client())
 325         return client()->smartInsertDeleteEnabled() && pasteboard->canSmartReplace();
 326     return false;
 327 }
 328
 329 bool Editor::shouldInsertFragment(PassRefPtr<DocumentFragment> fragment, PassRefPtr<Range> replacingDOMRange, EditorInsertAction givenAction)
 330 {
 331     if (client()) {
 332         Node* child = fragment->firstChild();
 333         if (child && fragment->lastChild() == child && child->isCharacterDataNode())
 334             return client()->shouldInsertText(static_cast<CharacterData*>(child)->data(), replacingDOMRange.get(), givenAction);
 335         return client()->shouldInsertNode(fragment.get(), replacingDOMRange.get(), givenAction);
 336     }
 337     return false;
 338 }
 339
 340 void Editor::replaceSelectionWithFragment(PassRefPtr<DocumentFragment> fragment, bool selectReplacement, bool smartReplace, bool matchStyle)
 341 {
 342     if (m_frame->selectionController()->isNone() || !fragment)
 343         return;
 344
 345     applyCommand(new ReplaceSelectionCommand(m_frame->document(), fragment, selectReplacement, smartReplace, matchStyle));
 346     m_frame->revealSelection(RenderLayer::gAlignToEdgeIfNeeded);
 347 }
 348
 349 void Editor::replaceSelectionWithText(const String& text, bool selectReplacement, bool smartReplace)
 350 {
 351     replaceSelectionWithFragment(createFragmentFromText(selectedRange().get(), text), selectReplacement, smartReplace, true);
 352 }
 353
 354 PassRefPtr<Range> Editor::selectedRange()
 355 {
 356     if (!m_frame)
 357         return 0;
 358     return m_frame->selectionController()->toRange();
 359 }
 360
 361 bool Editor::shouldDeleteRange(Range* range) const
 362 {
 363     ExceptionCode ec;
 364     if (!range || range->collapsed(ec))
 365         return false;
 366
 367     if (!canDeleteRange(range))
 368         return false;
 369
 370     if (client())
 371         return client()->shouldDeleteRange(range);
 372     return false;
 373 }
 374
 375 bool Editor::tryDHTMLCopy()
 376 {
 377     if (m_frame->selectionController()->isInPasswordField())
 378         return false;
 379
 380     // Must be done before oncopy adds types and data to the pboard,
 381     // also done for security, as it erases data from the last copy/paste.
 382     Pasteboard::generalPasteboard()->clear();
 383
 384     return !dispatchCPPEvent(copyEvent, ClipboardWritable);
 385 }
 386
 387 bool Editor::tryDHTMLCut()
 388 {
 389     if (m_frame->selectionController()->isInPasswordField())
 390         return false;
 391
 392     // Must be done before oncut adds types and data to the pboard,
 393     // also done for security, as it erases data from the last copy/paste.
 394     Pasteboard::generalPasteboard()->clear();
 395
 396     return !dispatchCPPEvent(cutEvent, ClipboardWritable);
 397 }
 398
 399 bool Editor::tryDHTMLPaste()
 400 {
 401     return !dispatchCPPEvent(pasteEvent, ClipboardReadable);
 402 }
 403
 404 void Editor::writeSelectionToPasteboard(Pasteboard* pasteboard)
 405 {
 406     pasteboard->writeSelection(selectedRange().get(), canSmartCopyOrDelete(), m_frame);
 407 }
 408
 409 bool Editor::shouldInsertText(const String& text, Range* range, EditorInsertAction action) const
 410 {
 411     if (client())
 412         return client()->shouldInsertText(text, range, action);
 413     return false;
 414 }
 415
 416 bool Editor::shouldShowDeleteInterface(HTMLElement* element) const
 417 {
 418     if (client())
 419         return client()->shouldShowDeleteInterface(element);
 420     return false;
 421 }
 422
 423 void Editor::respondToChangedSelection(const Selection& oldSelection)
 424 {
 425     if (client())
 426         client()->respondToChangedSelection();
 427     m_deleteButtonController->respondToChangedSelection(oldSelection);
 428 }
 429
 430 void Editor::respondToChangedContents(const Selection& endingSelection)
 431 {
 432     if (AXObjectCache::accessibilityEnabled()) {
 433         Node* node = endingSelection.start().node();
 434         if (node)
 435             m_frame->renderer()->document()->axObjectCache()->postNotification(node->renderer(), "AXValueChanged");
 436     }
 437
 438     if (client())
 439         client()->respondToChangedContents();
 440     m_deleteButtonController->respondToChangedContents();
 441 }
 442
 443 const FontData* Editor::fontForSelection(bool& hasMultipleFonts) const
 444 {
 445     if (hasMultipleFonts)
 446         hasMultipleFonts = false;
 447
 448     if (!m_frame->selectionController()->isRange()) {
 449         Node* nodeToRemove;
 450         RenderStyle* style = m_frame->styleForSelectionStart(nodeToRemove); // sets nodeToRemove
 451
 452         const FontData* result = 0;
 453         if (style)
 454             result = style->font().primaryFont();
 455
 456         if (nodeToRemove) {
 457             ExceptionCode ec;
 458             nodeToRemove->remove(ec);
 459             ASSERT(ec == 0);
 460         }
 461
 462         return result;
 463     }
 464
 465     const FontData* font = 0;
 466
 467     RefPtr<Range> range = m_frame->selectionController()->toRange();
 468     Node* startNode = range->editingStartPosition().node();
 469     if (startNode) {
 470         Node* pastEnd = range->pastEndNode();
 471         // In the loop below, n should eventually match pastEnd and not become nil, but we've seen at least one
 472         // unreproducible case where this didn't happen, so check for nil also.
 473         for (Node* n = startNode; n && n != pastEnd; n = n->traverseNextNode()) {
 474             RenderObject *renderer = n->renderer();
 475             if (!renderer)
 476                 continue;
 477             // FIXME: Are there any node types that have renderers, but that we should be skipping?
 478             const FontData* f = renderer->style()->font().primaryFont();
 479             if (!font) {
 480                 font = f;
 481                 if (!hasMultipleFonts)
 482                     break;
 483             } else if (font != f) {
 484                 hasMultipleFonts = true;
 485                 break;
 486             }
 487         }
 488     }
 489
 490     return font;
 491 }
 492
 493 Frame::TriState Editor::selectionUnorderedListState() const
 494 {
 495     if (m_frame->selectionController()->isCaret()) {
 496         Node* selectionNode = m_frame->selectionController()->selection().start().node();
 497         if (enclosingNodeWithTag(selectionNode, ulTag))
 498             return Frame::trueTriState;
 499     } else if (m_frame->selectionController()->isRange()) {
 500         Node* startNode = enclosingNodeWithTag(m_frame->selectionController()->selection().start().node(), ulTag);
 501         Node* endNode = enclosingNodeWithTag(m_frame->selectionController()->selection().end().node(), ulTag);
 502         if (startNode && endNode && startNode == endNode)
 503             return Frame::trueTriState;
 504     }
 505
 506     return Frame::falseTriState;
 507 }
 508
 509 Frame::TriState Editor::selectionOrderedListState() const
 510 {
 511     if (m_frame->selectionController()->isCaret()) {
 512         Node* selectionNode = m_frame->selectionController()->selection().start().node();
 513         if (enclosingNodeWithTag(selectionNode, olTag))
 514             return Frame::trueTriState;
 515     } else if (m_frame->selectionController()->isRange()) {
 516         Node* startNode = enclosingNodeWithTag(m_frame->selectionController()->selection().start().node(), olTag);
 517         Node* endNode = enclosingNodeWithTag(m_frame->selectionController()->selection().end().node(), olTag);
 518         if (startNode && endNode && startNode == endNode)
 519             return Frame::trueTriState;
 520     }
 521
 522     return Frame::falseTriState;
 523 }
 524
 525 void Editor::removeFormattingAndStyle()
 526 {
 527     Document* document = m_frame->document();
 528
 529     // Make a plain text string from the selection to remove formatting like tables and lists.
 530     String string = m_frame->selectionController()->toString();
 531
 532     // Get the default style for this editable root, it's the style that we'll give the
 533     // content that we're operating on.
 534     Node* root = m_frame->selectionController()->rootEditableElement();
 535     RefPtr<CSSComputedStyleDeclaration> computedStyle = new CSSComputedStyleDeclaration(root);
 536     RefPtr<CSSMutableStyleDeclaration> defaultStyle = computedStyle->copyInheritableProperties();
 537
 538     // Delete the selected content.
 539     // FIXME: We should be able to leave this to insertText, but its delete operation
 540     // doesn't preserve the style we're about to set.
 541     deleteSelectionWithSmartDelete(false);
 542     // Normally, deleting a fully selected anchor and then inserting text will re-create
 543     // the removed anchor, but we don't want that behavior here.
 544     setRemovedAnchor(0);
 545     // Insert the content with the default style.
 546     m_frame->setTypingStyle(defaultStyle.get());
 547     TypingCommand::insertText(document, string, true);
 548 }
 549
 550 void Editor::setLastEditCommand(PassRefPtr<EditCommand> lastEditCommand)
 551 {
 552     m_lastEditCommand = lastEditCommand;
 553 }
 554
 555 // Returns whether caller should continue with "the default processing", which is the same as
 556 // the event handler NOT setting the return value to false
 557 bool Editor::dispatchCPPEvent(const AtomicString &eventType, ClipboardAccessPolicy policy)
 558 {
 559     Node* target = m_frame->selectionController()->start().element();
 560     if (!target && m_frame->document())
 561         target = m_frame->document()->body();
 562     if (!target)
 563         return true;
 564     target = target->shadowAncestorNode();
 565
 566     RefPtr<Clipboard> clipboard = newGeneralClipboard(policy);
 567
 568     ExceptionCode ec = 0;
 569     RefPtr<Event> evt = new ClipboardEvent(eventType, true, true, clipboard.get());
 570     EventTargetNodeCast(target)->dispatchEvent(evt, ec, true);
 571     bool noDefaultProcessing = evt->defaultPrevented();
 572
 573     // invalidate clipboard here for security
 574     clipboard->setAccessPolicy(ClipboardNumb);
 575
 576     return !noDefaultProcessing;
 577 }
 578
 579 void Editor::applyStyle(CSSStyleDeclaration* style, EditAction editingAction)
 580 {
 581     switch (m_frame->selectionController()->state()) {
 582         case Selection::NONE:
 583             // do nothing
 584             break;
 585         case Selection::CARET: {
 586             m_frame->computeAndSetTypingStyle(style, editingAction);
 587             break;
 588         }
 589         case Selection::RANGE:
 590             if (m_frame->document() && style)
 591                 applyCommand(new ApplyStyleCommand(m_frame->document(), style, editingAction));
 592             break;
 593     }
 594 }
 595
 596 bool Editor::shouldApplyStyle(CSSStyleDeclaration* style, Range* range)
 597 {
 598     return client()->shouldApplyStyle(style, range);
 599 }
 600
 601 void Editor::applyParagraphStyle(CSSStyleDeclaration* style, EditAction editingAction)
 602 {
 603     switch (m_frame->selectionController()->state()) {
 604         case Selection::NONE:
 605             // do nothing
 606             break;
 607         case Selection::CARET:
 608         case Selection::RANGE:
 609             if (m_frame->document() && style)
 610                 applyCommand(new ApplyStyleCommand(m_frame->document(), style, editingAction, ApplyStyleCommand::ForceBlockProperties));
 611             break;
 612     }
 613 }
 614
 615 void Editor::applyStyleToSelection(CSSStyleDeclaration* style, EditAction editingAction)
 616 {
 617     if (!style || style->length() == 0 || !canEditRichly())
 618         return;
 619
 620     if (client() && client()->shouldApplyStyle(style, m_frame->selectionController()->toRange().get()))
 621         applyStyle(style, editingAction);
 622 }
 623
 624 void Editor::applyParagraphStyleToSelection(CSSStyleDeclaration* style, EditAction editingAction)
 625 {
 626     if (!style || style->length() == 0 || !canEditRichly())
 627         return;
 628
 629     if (client() && client()->shouldApplyStyle(style, m_frame->selectionController()->toRange().get()))
 630         applyParagraphStyle(style, editingAction);
 631 }
 632
 633 bool Editor::selectWordBeforeMenuEvent() const
 634 {
 635     if (client())
 636         return client()->selectWordBeforeMenuEvent();
 637     return false;
 638 }
 639
 640 bool Editor::clientIsEditable() const
 641 {
 642     if (client())
 643         return client()->isEditable();
 644     return false;
 645 }
 646
 647 bool Editor::selectionStartHasStyle(CSSStyleDeclaration* style) const
 648 {
 649     Node* nodeToRemove;
 650     RefPtr<CSSStyleDeclaration> selectionStyle = m_frame->selectionComputedStyle(nodeToRemove);
 651     if (!selectionStyle)
 652         return false;
 653
 654     RefPtr<CSSMutableStyleDeclaration> mutableStyle = style->makeMutable();
 655
 656     bool match = true;
 657     DeprecatedValueListConstIterator<CSSProperty> end;
 658     for (DeprecatedValueListConstIterator<CSSProperty> it = mutableStyle->valuesIterator(); it != end; ++it) {
 659         int propertyID = (*it).id();
 660         if (!equalIgnoringCase(mutableStyle->getPropertyValue(propertyID), selectionStyle->getPropertyValue(propertyID))) {
 661             match = false;
 662             break;
 663         }
 664     }
 665
 666     if (nodeToRemove) {
 667         ExceptionCode ec = 0;
 668         nodeToRemove->remove(ec);
 669         ASSERT(ec == 0);
 670     }
 671
 672     return match;
 673 }
 674
 675 void Editor::indent()
 676 {
 677     applyCommand(new IndentOutdentCommand(m_frame->document(), IndentOutdentCommand::Indent));
 678 }
 679
 680 void Editor::outdent()
 681 {
 682     applyCommand(new IndentOutdentCommand(m_frame->document(), IndentOutdentCommand::Outdent));
 683 }
 684
 685 static void dispatchEditableContentChangedEvents(const EditCommand& command)
 686 {
 687     Element* startRoot = command.startingRootEditableElement();
 688     Element* endRoot = command.endingRootEditableElement();
 689     ExceptionCode ec;
 690     if (startRoot)
 691         startRoot->dispatchEvent(new Event(webkitEditableContentChangedEvent, false, false), ec, true);
 692     if (endRoot && endRoot != startRoot)
 693         endRoot->dispatchEvent(new Event(webkitEditableContentChangedEvent, false, false), ec, true);
 694 }
 695
 696 void Editor::appliedEditing(PassRefPtr<EditCommand> cmd)
 697 {
 698     dispatchEditableContentChangedEvents(*cmd);
 699
 700     // FIXME: We shouldn't tell setSelection to clear the typing style or removed anchor here.
 701     // If we didn't, we wouldn't have to save/restore the removedAnchor, and we wouldn't have to have
 702     // the typing style stored in two places (the Frame and commands).
 703     RefPtr<Node> anchor = removedAnchor();
 704
 705     Selection newSelection(cmd->endingSelection());
 706     // If there is no selection change, don't bother sending shouldChangeSelection, but still call setSelection,
 707     // because there is work that it must do in this situation.
 708     if (newSelection == m_frame->selectionController()->selection() || m_frame->shouldChangeSelection(newSelection))
 709         m_frame->selectionController()->setSelection(newSelection, false);
 710
 711     setRemovedAnchor(anchor);
 712
 713     // Now set the typing style from the command. Clear it when done.
 714     // This helps make the case work where you completely delete a piece
 715     // of styled text and then type a character immediately after.
 716     // That new character needs to take on the style of the just-deleted text.
 717     // FIXME: Improve typing style.
 718     // See this bug: <rdar://problem/3769899> Implementation of typing style needs improvement
 719     if (cmd->typingStyle()) {
 720         m_frame->setTypingStyle(cmd->typingStyle());
 721         cmd->setTypingStyle(0);
 722     }
 723
 724     // Command will be equal to last edit command only in the case of typing
 725     if (m_lastEditCommand.get() == cmd)
 726         ASSERT(cmd->isTypingCommand());
 727     else {
 728         // Only register a new undo command if the command passed in is
 729         // different from the last command
 730         m_lastEditCommand = cmd;
 731         if (client())
 732             client()->registerCommandForUndo(m_lastEditCommand);
 733     }
 734     respondToChangedContents(newSelection);
 735 }
 736
 737 void Editor::unappliedEditing(PassRefPtr<EditCommand> cmd)
 738 {
 739     dispatchEditableContentChangedEvents(*cmd);
 740
 741     Selection newSelection(cmd->startingSelection());
 742     // If there is no selection change, don't bother sending shouldChangeSelection, but still call setSelection,
 743     // because there is work that it must do in this situation.
 744     if (newSelection == m_frame->selectionController()->selection() || m_frame->shouldChangeSelection(newSelection))
 745         m_frame->selectionController()->setSelection(newSelection, true);
 746
 747     m_lastEditCommand = 0;
 748     if (client())
 749         client()->registerCommandForRedo(cmd);
 750     respondToChangedContents(newSelection);
 751 }
 752
 753 void Editor::reappliedEditing(PassRefPtr<EditCommand> cmd)
 754 {
 755     dispatchEditableContentChangedEvents(*cmd);
 756
 757     Selection newSelection(cmd->endingSelection());
 758     // If there is no selection change, don't bother sending shouldChangeSelection, but still call setSelection,
 759     // because there is work that it must do in this situation.
 760     if (newSelection == m_frame->selectionController()->selection() || m_frame->shouldChangeSelection(newSelection))
 761         m_frame->selectionController()->setSelection(newSelection, true);
 762
 763     m_lastEditCommand = 0;
 764     if (client())
 765         client()->registerCommandForUndo(cmd);
 766     respondToChangedContents(newSelection);
 767 }
 768
 769 // Execute command functions
 770
 771 static bool execCopy(Frame* frame, Event*)
 772 {
 773     frame->editor()->copy();
 774     return true;
 775 }
 776
 777 static bool execCut(Frame* frame, Event*)
 778 {
 779     frame->editor()->cut();
 780     return true;
 781 }
 782
 783 static bool execDelete(Frame* frame, Event*)
 784 {
 785     frame->editor()->performDelete();
 786     return true;
 787 }
 788
 789 static bool execDeleteWordBackward(Frame* frame, Event*)
 790 {
 791     frame->editor()->deleteWithDirection(SelectionController::BACKWARD, WordGranularity, true, false);
 792     return true;
 793 }
 794
 795 static bool execDeleteWordForward(Frame* frame, Event*)
 796 {
 797     frame->editor()->deleteWithDirection(SelectionController::FORWARD, WordGranularity, true, false);
 798     return true;
 799 }
 800
 801 static bool execBackwardDelete(Frame* frame, Event*)
 802 {
 803     frame->editor()->deleteWithDirection(SelectionController::BACKWARD, CharacterGranularity, false, true);
 804     return true;
 805 }
 806
 807 static bool execForwardDelete(Frame* frame, Event*)
 808 {
 809     frame->editor()->deleteWithDirection(SelectionController::FORWARD, CharacterGranularity, false, true);
 810     return true;
 811 }
 812
 813 static bool execMoveBackward(Frame* frame, Event*)
 814 {
 815     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::BACKWARD, CharacterGranularity, true);
 816     return true;
 817 }
 818
 819 static bool execMoveBackwardAndModifySelection(Frame* frame, Event*)
 820 {
 821     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::BACKWARD, CharacterGranularity, true);
 822     return true;
 823 }
 824
 825 static bool execMoveUpByPageAndModifyCaret(Frame* frame, Event*)
 826 {
 827     RenderObject* renderer = frame->document()->focusedNode()->renderer();
 828     if (renderer->style()->overflowY() == OSCROLL
 829         || renderer->style()->overflowY() == OAUTO
 830         || renderer->isTextArea()) {
 831         int height = -(frame->document()->focusedNode()->renderer()->clientHeight()-PAGE_KEEP);
 832         bool handledScroll = renderer->scroll(ScrollUp, ScrollByPage);
 833         bool handledCaretMove = frame->selectionController()->modify(SelectionController::MOVE, height);
 834         return handledScroll || handledCaretMove;
 835     }
 836     return false;
 837 }
 838
 839 static bool execMoveDown(Frame* frame, Event*)
 840 {
 841     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::FORWARD, LineGranularity, true);
 842     return true;
 843 }
 844
 845 static bool execMoveDownAndModifySelection(Frame* frame, Event*)
 846 {
 847     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::FORWARD, LineGranularity, true);
 848     return true;
 849 }
 850
 851 static bool execMoveForward(Frame* frame, Event*)
 852 {
 853     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::FORWARD, CharacterGranularity, true);
 854     return true;
 855 }
 856
 857 static bool execMoveForwardAndModifySelection(Frame* frame, Event*)
 858 {
 859     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::FORWARD, CharacterGranularity, true);
 860     return true;
 861 }
 862
 863 static bool execMoveDownByPageAndModifyCaret(Frame* frame, Event*)
 864 {
 865     RenderObject* renderer = frame->document()->focusedNode()->renderer();
 866     if (renderer->style()->overflowY() == OSCROLL
 867         || renderer->style()->overflowY() == OAUTO
 868         || renderer->isTextArea()) {
 869         int height = frame->document()->focusedNode()->renderer()->clientHeight()-PAGE_KEEP;
 870         bool handledScroll = renderer->scroll(ScrollDown, ScrollByPage);
 871         bool handledCaretMove = frame->selectionController()->modify(SelectionController::MOVE, height);
 872         return handledScroll || handledCaretMove;
 873     }
 874     return false;
 875 }
 876
 877 static bool execMoveLeft(Frame* frame, Event*)
 878 {
 879     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::LEFT, CharacterGranularity, true);
 880     return true;
 881 }
 882
 883 static bool execMoveLeftAndModifySelection(Frame* frame, Event*)
 884 {
 885     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::LEFT, CharacterGranularity, true);
 886     return true;
 887 }
 888
 889 static bool execMoveRight(Frame* frame, Event*)
 890 {
 891     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::RIGHT, CharacterGranularity, true);
 892     return true;
 893 }
 894
 895 static bool execMoveRightAndModifySelection(Frame* frame, Event*)
 896 {
 897     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::RIGHT, CharacterGranularity, true);
 898     return true;
 899 }
 900
 901 static bool execMoveToBeginningOfDocument(Frame* frame, Event*)
 902 {
 903     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::BACKWARD, DocumentBoundary, true);
 904     return true;
 905 }
 906
 907 static bool execMoveToBeginningOfDocumentAndModifySelection(Frame* frame, Event*)
 908 {
 909     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::BACKWARD, DocumentBoundary, true);
 910     return true;
 911 }
 912
 913 static bool execMoveToBeginningOfSentence(Frame* frame, Event*)
 914 {
 915     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::BACKWARD, SentenceBoundary, true);
 916     return true;
 917 }
 918
 919 static bool execMoveToBeginningOfSentenceAndModifySelection(Frame* frame, Event*)
 920 {
 921     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::BACKWARD, SentenceBoundary, true);
 922     return true;
 923 }
 924
 925 static bool execMoveToBeginningOfLine(Frame* frame, Event*)
 926 {
 927     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::BACKWARD, LineBoundary, true);
 928     return true;
 929 }
 930
 931 static bool execMoveToBeginningOfLineAndModifySelection(Frame* frame, Event*)
 932 {
 933     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::BACKWARD, LineBoundary, true);
 934     return true;
 935 }
 936
 937 static bool execMoveToBeginningOfParagraph(Frame* frame, Event*)
 938 {
 939     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::BACKWARD, ParagraphBoundary, true);
 940     return true;
 941 }
 942
 943 static bool execMoveToBeginningOfParagraphAndModifySelection(Frame* frame, Event*)
 944 {
 945     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::BACKWARD, ParagraphBoundary, true);
 946     return true;
 947 }
 948
 949 static bool execMoveToEndOfDocument(Frame* frame, Event*)
 950 {
 951     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::FORWARD, DocumentBoundary, true);
 952     return true;
 953 }
 954
 955 static bool execMoveToEndOfDocumentAndModifySelection(Frame* frame, Event*)
 956 {
 957     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::FORWARD, DocumentBoundary, true);
 958     return true;
 959 }
 960
 961 static bool execMoveToEndOfSentence(Frame* frame, Event*)
 962 {
 963     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::FORWARD, SentenceBoundary, true);
 964     return true;
 965 }
 966
 967 static bool execMoveToEndOfSentenceAndModifySelection(Frame* frame, Event*)
 968 {
 969     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::FORWARD, SentenceBoundary, true);
 970     return true;
 971 }
 972
 973 static bool execMoveToEndOfLine(Frame* frame, Event*)
 974 {
 975     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::FORWARD, LineBoundary, true);
 976     return true;
 977 }
 978
 979 static bool execMoveToEndOfLineAndModifySelection(Frame* frame, Event*)
 980 {
 981     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::FORWARD, LineBoundary, true);
 982     return true;
 983 }
 984
 985 static bool execMoveToEndOfParagraph(Frame* frame, Event*)
 986 {
 987     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::FORWARD, ParagraphBoundary, true);
 988     return true;
 989 }
 990
 991 static bool execMoveToEndOfParagraphAndModifySelection(Frame* frame, Event*)
 992 {
 993     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::FORWARD, ParagraphBoundary, true);
 994     return true;
 995 }
 996
 997 static bool execMoveParagraphBackwardAndModifySelection(Frame* frame, Event*)
 998 {
 999     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::BACKWARD, ParagraphGranularity, true);
1000     return true;
1001 }
1002
1003 static bool execMoveParagraphForwardAndModifySelection(Frame* frame, Event*)
1004 {
1005     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::FORWARD, ParagraphGranularity, true);
1006     return true;
1007 }
1008
1009 static bool execMoveUp(Frame* frame, Event*)
1010 {
1011     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::BACKWARD, LineGranularity, true);
1012     return true;
1013 }
1014
1015 static bool execMoveUpAndModifySelection(Frame* frame, Event*)
1016 {
1017     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::BACKWARD, LineGranularity, true);
1018     return true;
1019 }
1020
1021 static bool execMoveWordBackward(Frame* frame, Event*)
1022 {
1023     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::BACKWARD, WordGranularity, true);
1024     return true;
1025 }
1026
1027 static bool execMoveWordBackwardAndModifySelection(Frame* frame, Event*)
1028 {
1029     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::BACKWARD, WordGranularity, true);
1030     return true;
1031 }
1032
1033 static bool execMoveWordForward(Frame* frame, Event*)
1034 {
1035     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::FORWARD, WordGranularity, true);
1036     return true;
1037 }
1038
1039 static bool execMoveWordForwardAndModifySelection(Frame* frame, Event*)
1040 {
1041     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::FORWARD, WordGranularity, true);
1042     return true;
1043 }
1044
1045 static bool execMoveWordLeft(Frame* frame, Event*)
1046 {
1047     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::LEFT, WordGranularity, true);
1048     return true;
1049 }
1050
1051 static bool execMoveWordLeftAndModifySelection(Frame* frame, Event*)
1052 {
1053     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::LEFT, WordGranularity, true);
1054     return true;
1055 }
1056
1057 static bool execMoveWordRight(Frame* frame, Event*)
1058 {
1059     frame->selectionController()->modify(SelectionController::MOVE, SelectionController::RIGHT, WordGranularity, true);
1060     return true;
1061 }
1062
1063 static bool execMoveWordRightAndModifySelection(Frame* frame, Event*)
1064 {
1065     frame->selectionController()->modify(SelectionController::EXTEND, SelectionController::RIGHT, WordGranularity, true);
1066     return true;
1067 }
1068
1069 static bool execPaste(Frame* frame, Event*)
1070 {
1071     frame->editor()->paste();
1072     return true;
1073 }
1074
1075 static bool execSelectAll(Frame* frame, Event*)
1076 {
1077     frame->selectionController()->selectAll();
1078     return true;
1079 }
1080
1081 static bool execToggleBold(Frame* frame, Event*)
1082 {
1083     ExceptionCode ec;
1084
1085     RefPtr<CSSStyleDeclaration> style = frame->document()->createCSSStyleDeclaration();
1086     style->setProperty(CSS_PROP_FONT_WEIGHT, "bold", false, ec);
1087     if (frame->editor()->selectionStartHasStyle(style.get()))
1088         style->setProperty(CSS_PROP_FONT_WEIGHT, "normal", false, ec);
1089     frame->editor()->applyStyleToSelection(style.get(), EditActionSetFont);
1090     return true;
1091 }
1092
1093 static bool execToggleItalic(Frame* frame, Event*)
1094 {
1095     ExceptionCode ec;
1096
1097     RefPtr<CSSStyleDeclaration> style = frame->document()->createCSSStyleDeclaration();
1098     style->setProperty(CSS_PROP_FONT_STYLE, "italic", false, ec);
1099     if (frame->editor()->selectionStartHasStyle(style.get()))
1100         style->setProperty(CSS_PROP_FONT_STYLE, "normal", false, ec);
1101     frame->editor()->applyStyleToSelection(style.get(), EditActionSetFont);
1102     return true;
1103 }
1104
1105 static bool execRedo(Frame* frame, Event*)
1106 {
1107     frame->editor()->redo();
1108     return true;
1109 }
1110
1111 static bool execUndo(Frame* frame, Event*)
1112 {
1113     frame->editor()->undo();
1114     return true;
1115 }
1116
1117 static inline Frame* targetFrame(Frame* frame, Event* evt)
1118 {
1119     Node* node = evt ? evt->target()->toNode() : 0;
1120     if (!node)
1121         return frame;
1122     return node->document()->frame();
1123 }
1124
1125 static bool execInsertTab(Frame* frame, Event* evt)
1126 {
1127     return targetFrame(frame, evt)->eventHandler()->handleTextInputEvent("\t", evt, false, false);
1128 }
1129
1130 static bool execInsertBacktab(Frame* frame, Event* evt)
1131 {
1132     return targetFrame(frame, evt)->eventHandler()->handleTextInputEvent("\t", evt, false, true);
1133 }
1134
1135 static bool execInsertNewline(Frame* frame, Event* evt)
1136 {
1137     Frame* targetFrame = WebCore::targetFrame(frame, evt);
1138     return targetFrame->eventHandler()->handleTextInputEvent("\n", evt, !targetFrame->editor()->canEditRichly());
1139 }
1140
1141 static bool execInsertLineBreak(Frame* frame, Event* evt)
1142 {
1143     return targetFrame(frame, evt)->eventHandler()->handleTextInputEvent("\n", evt, true);
1144 }
1145
1146 // Enabled functions
1147
1148 static bool enabled(Frame*, Event*)
1149 {
1150     return true;
1151 }
1152
1153 static bool canPaste(Frame* frame, Event*)
1154 {
1155     return frame->editor()->canPaste();
1156 }
1157
1158 static bool hasEditableSelection(Frame* frame, Event* evt)
1159 {
1160     if (evt)
1161         return selectionForEvent(frame, evt).isContentEditable();
1162     return frame->selectionController()->isContentEditable();
1163 }
1164
1165 static bool hasEditableRangeSelection(Frame* frame, Event*)
1166 {
1167     return frame->selectionController()->isRange() && frame->selectionController()->isContentEditable();
1168 }
1169
1170 static bool hasRangeSelection(Frame* frame, Event*)
1171 {
1172     return frame->selectionController()->isRange();
1173 }
1174
1175 static bool hasRichlyEditableSelection(Frame* frame, Event*)
1176 {
1177     return frame->selectionController()->isCaretOrRange() && frame->selectionController()->isContentRichlyEditable();
1178 }
1179
1180 static bool canRedo(Frame* frame, Event*)
1181 {
1182     return frame->editor()->canRedo();
1183 }
1184
1185 static bool canUndo(Frame* frame, Event*)
1186 {
1187     return frame->editor()->canUndo();
1188 }
1189
1190 struct Command {
1191     bool (*enabled)(Frame*, Event*);
1192     bool (*exec)(Frame*, Event*);
1193 };
1194
1195 typedef HashMap<RefPtr<AtomicStringImpl>, const Command*> CommandMap;
1196
1197 static CommandMap* createCommandMap()
1198 {
1199     struct CommandEntry { const char* name; Command command; };
1200
1201     static const CommandEntry commands[] = {
1202         { "BackwardDelete", { hasEditableSelection, execBackwardDelete } },
1203         { "Copy", { hasRangeSelection, execCopy } },
1204         { "Cut", { hasEditableRangeSelection, execCut } },
1205         { "Delete", { hasEditableSelection, execDelete } },
1206         { "DeleteWordBackward", { hasEditableSelection, execDeleteWordBackward } },
1207         { "DeleteWordForward", { hasEditableSelection, execDeleteWordForward} },
1208         { "ForwardDelete", { hasEditableSelection, execForwardDelete } },
1209         { "InsertBacktab", { hasEditableSelection, execInsertBacktab } },
1210         { "InsertTab", { hasEditableSelection, execInsertTab } },
1211         { "InsertLineBreak", { hasEditableSelection, execInsertLineBreak } },
1212         { "InsertNewline", { hasEditableSelection, execInsertNewline } },
1213         { "MoveBackward", { hasEditableSelection, execMoveBackward } },
1214         { "MoveBackwardAndModifySelection", { hasEditableSelection, execMoveBackwardAndModifySelection } },
1215         { "MoveUpByPageAndModifyCaret", { hasEditableSelection, execMoveUpByPageAndModifyCaret } },
1216         { "MoveDown", { hasEditableSelection, execMoveDown } },
1217         { "MoveDownAndModifySelection", { hasEditableSelection, execMoveDownAndModifySelection } },
1218         { "MoveForward", { hasEditableSelection, execMoveForward } },
1219         { "MoveForwardAndModifySelection", { hasEditableSelection, execMoveForwardAndModifySelection } },
1220         { "MoveDownByPageAndModifyCaret", { hasEditableSelection, execMoveDownByPageAndModifyCaret } },
1221         { "MoveLeft", { hasEditableSelection, execMoveLeft } },
1222         { "MoveLeftAndModifySelection", { hasEditableSelection, execMoveLeftAndModifySelection } },
1223         { "MoveRight", { hasEditableSelection, execMoveRight } },
1224         { "MoveRightAndModifySelection", { hasEditableSelection, execMoveRightAndModifySelection } },
1225         { "MoveToBeginningOfDocument", { hasEditableSelection, execMoveToBeginningOfDocument } },
1226         { "MoveToBeginningOfDocumentAndModifySelection", { hasEditableSelection, execMoveToBeginningOfDocumentAndModifySelection } },
1227         { "MoveToBeginningOfSentence", { hasEditableSelection, execMoveToBeginningOfSentence } },
1228         { "MoveToBeginningOfSentenceAndModifySelection", { hasEditableSelection, execMoveToBeginningOfSentenceAndModifySelection } },
1229         { "MoveToBeginningOfLine", { hasEditableSelection, execMoveToBeginningOfLine } },
1230         { "MoveToBeginningOfLineAndModifySelection", { hasEditableSelection, execMoveToBeginningOfLineAndModifySelection } },
1231         { "MoveToBeginningOfParagraph", { hasEditableSelection, execMoveToBeginningOfParagraph } },
1232         { "MoveToBeginningOfParagraphAndModifySelection", { hasEditableSelection, execMoveToBeginningOfParagraphAndModifySelection } },
1233         { "MoveToEndOfDocument", { hasEditableSelection, execMoveToEndOfDocument } },
1234         { "MoveToEndOfDocumentAndModifySelection", { hasEditableSelection, execMoveToEndOfDocumentAndModifySelection } },
1235         { "MoveToEndOfSentence", { hasEditableSelection, execMoveToEndOfSentence } },
1236         { "MoveToEndOfSentenceAndModifySelection", { hasEditableSelection, execMoveToEndOfSentenceAndModifySelection } },
1237         { "MoveToEndOfLine", { hasEditableSelection, execMoveToEndOfLine } },
1238         { "MoveToEndOfLineAndModifySelection", { hasEditableSelection, execMoveToEndOfLineAndModifySelection } },
1239         { "MoveToEndOfParagraph", { hasEditableSelection, execMoveToEndOfParagraph } },
1240         { "MoveToEndOfParagraphAndModifySelection", { hasEditableSelection, execMoveToEndOfParagraphAndModifySelection } },
1241         { "MoveParagraphBackwardAndModifySelection", { hasEditableSelection, execMoveParagraphBackwardAndModifySelection } },
1242         { "MoveParagraphForwardAndModifySelection", { hasEditableSelection, execMoveParagraphForwardAndModifySelection } },
1243         { "MoveUp", { hasEditableSelection, execMoveUp } },
1244         { "MoveUpAndModifySelection", { hasEditableSelection, execMoveUpAndModifySelection } },
1245         { "MoveWordBackward", { hasEditableSelection, execMoveWordBackward } },
1246         { "MoveWordBackwardAndModifySelection", { hasEditableSelection, execMoveWordBackwardAndModifySelection } },
1247         { "MoveWordForward", { hasEditableSelection, execMoveWordForward } },
1248         { "MoveWordForwardAndModifySelection", { hasEditableSelection, execMoveWordForwardAndModifySelection } },
1249         { "MoveWordLeft", { hasEditableSelection, execMoveWordLeft } },
1250         { "MoveWordLeftAndModifySelection", { hasEditableSelection, execMoveWordLeftAndModifySelection } },
1251         { "MoveWordRight", { hasEditableSelection, execMoveWordRight } },
1252         { "MoveWordRightAndModifySelection", { hasEditableSelection, execMoveWordRightAndModifySelection } },
1253         { "Paste", { canPaste, execPaste } },
1254         { "Redo", { canRedo, execRedo } },
1255         { "SelectAll", { enabled, execSelectAll } },
1256         { "ToggleBold", { hasRichlyEditableSelection, execToggleBold } },
1257         { "ToggleItalic", { hasRichlyEditableSelection, execToggleItalic } },
1258         { "Undo", { canUndo, execUndo } }
1259     };
1260
1261     CommandMap* commandMap = new CommandMap;
1262
1263     const unsigned numCommands = sizeof(commands) / sizeof(commands[0]);
1264     for (unsigned i = 0; i < numCommands; i++)
1265         commandMap->set(AtomicString(commands[i].name).impl(), &commands[i].command);
1266
1267     return commandMap;
1268 }
1269
1270 // =============================================================================
1271 //
1272 // public editing commands
1273 //
1274 // =============================================================================
1275
1276 Editor::Editor(Frame* frame)
1277     : m_frame(frame)
1278     , m_deleteButtonController(new DeleteButtonController(frame))
1279     , m_ignoreMarkedTextSelectionChange(false)
1280 {
1281 }
1282
1283 Editor::~Editor()
1284 {
1285 }
1286
1287 bool Editor::execCommand(const AtomicString& command, Event* triggeringEvent)
1288 {
1289     if (!m_frame->document())
1290         return false;
1291
1292     static CommandMap* commandMap;
1293     if (!commandMap)
1294         commandMap = createCommandMap();
1295
1296     const Command* c = commandMap->get(command.impl());
1297     if (!c)
1298         return false;
1299
1300     bool handled = false;
1301
1302     if (c->enabled(m_frame, triggeringEvent)) {
1303         m_frame->document()->updateLayoutIgnorePendingStylesheets();
1304         handled = c->exec(m_frame, triggeringEvent);
1305     }
1306
1307     return handled;
1308 }
1309
1310 bool Editor::insertText(const String& text, Event* triggeringEvent)
1311 {
1312     return m_frame->eventHandler()->handleTextInputEvent(text, triggeringEvent);
1313 }
1314
1315 bool Editor::insertTextWithoutSendingTextEvent(const String& text, bool selectInsertedText, Event* triggeringEvent)
1316 {
1317     if (text.isEmpty())
1318         return false;
1319
1320     RefPtr<Range> range = m_frame->markedTextRange();
1321     if (!range) {
1322         Selection selection = selectionForEvent(m_frame, triggeringEvent);
1323         if (!selection.isContentEditable())
1324             return false;
1325         range = selection.toRange();
1326     }
1327
1328     if (!shouldInsertText(text, range.get(), EditorInsertActionTyped)) {
1329         discardMarkedText();
1330         return true;
1331     }
1332
1333     setIgnoreMarkedTextSelectionChange(true);
1334
1335     // If we had marked text, replace that instead of the selection/caret.
1336     selectMarkedText();
1337
1338     // Get the selection to use for the event that triggered this insertText.
1339     // If the event handler changed the selection, we may want to use a different selection
1340     // that is contained in the event target.
1341     Selection selection = selectionForEvent(m_frame, triggeringEvent);
1342     if (selection.isContentEditable()) {
1343         if (Node* selectionStart = selection.start().node()) {
1344             RefPtr<Document> document = selectionStart->document();
1345
1346             // Insert the text
1347             TypingCommand::insertText(document.get(), text, selection, selectInsertedText);
1348
1349             // Reveal the current selection
1350             if (Frame* editedFrame = document->frame())
1351                 if (Page* page = editedFrame->page())
1352                     page->focusController()->focusedOrMainFrame()->revealSelection(RenderLayer::gAlignToEdgeIfNeeded);
1353         }
1354     }
1355
1356     setIgnoreMarkedTextSelectionChange(false);
1357
1358     // Inserting unmarks any marked text.
1359     unmarkText();
1360
1361     return true;
1362 }
1363
1364 bool Editor::insertLineBreak()
1365 {
1366     if (!canEdit())
1367         return false;
1368
1369     if (!shouldInsertText("\n", m_frame->selectionController()->toRange().get(), EditorInsertActionTyped))
1370         return true;
1371
1372     TypingCommand::insertLineBreak(m_frame->document());
1373     m_frame->revealSelection(RenderLayer::gAlignToEdgeIfNeeded);
1374     return true;
1375 }
1376
1377 bool Editor::insertParagraphSeparator()
1378 {
1379     if (!canEdit())
1380         return false;
1381
1382     if (!canEditRichly())
1383         return insertLineBreak();
1384
1385     if (!shouldInsertText("\n", m_frame->selectionController()->toRange().get(), EditorInsertActionTyped))
1386         return true;
1387
1388     TypingCommand::insertParagraphSeparator(m_frame->document());
1389     m_frame->revealSelection(RenderLayer::gAlignToEdgeIfNeeded);
1390     return true;
1391 }
1392
1393 void Editor::cut()
1394 {
1395     if (tryDHTMLCut())
1396         return; // DHTML did the whole operation
1397     if (!canCut()) {
1398         systemBeep();
1399         return;
1400     }
1401     RefPtr<Range> selection = selectedRange();
1402     if (shouldDeleteRange(selection.get())) {
1403         Pasteboard::generalPasteboard()->writeSelection(selection.get(), canSmartCopyOrDelete(), m_frame);
1404         didWriteSelectionToPasteboard();
1405         deleteSelectionWithSmartDelete();
1406     }
1407 }
1408
1409 void Editor::copy()
1410 {
1411     if (tryDHTMLCopy())
1412         return; // DHTML did the whole operation
1413     if (!canCopy()) {
1414         systemBeep();
1415         return;
1416     }
1417     Pasteboard::generalPasteboard()->writeSelection(selectedRange().get(), canSmartCopyOrDelete(), m_frame);
1418     didWriteSelectionToPasteboard();
1419 }
1420
1421 void Editor::paste()
1422 {
1423     ASSERT(m_frame->document());
1424     DocLoader* loader = m_frame->document()->docLoader();
1425 #if PLATFORM(MAC)
1426     // using the platform independent code below requires moving all of
1427     // WEBHTMLView: _documentFragmentFromPasteboard over to PasteboardMac.
1428     loader->setAllowStaleResources(true);
1429     m_frame->issuePasteCommand();
1430     loader->setAllowStaleResources(false);
1431 #else
1432     if (tryDHTMLPaste())
1433         return;     // DHTML did the whole operation
1434     if (!canPaste())
1435         return;
1436     loader->setAllowStaleResources(true);
1437     if (m_frame->selectionController()->isContentRichlyEditable())
1438         pasteWithPasteboard(Pasteboard::generalPasteboard(), true);
1439     else
1440         pasteAsPlainTextWithPasteboard(Pasteboard::generalPasteboard());
1441     loader->setAllowStaleResources(false);
1442 #endif
1443 }
1444
1445 void Editor::pasteAsPlainText()
1446 {
1447    if (!canPaste())
1448         return;
1449    pasteAsPlainTextWithPasteboard(Pasteboard::generalPasteboard());
1450 }
1451
1452 void Editor::performDelete()
1453 {
1454     if (!canDelete()) {
1455         systemBeep();
1456         return;
1457     }
1458     deleteRange(selectedRange().get(), true, false, true, deleteSelectionAction, CharacterGranularity);
1459 }
1460
1461 void Editor::copyURL(const KURL& url, const String& title)
1462 {
1463     Pasteboard::generalPasteboard()->writeURL(url, title, m_frame);
1464 }
1465
1466 void Editor::copyImage(const HitTestResult& result)
1467 {
1468     Pasteboard::generalPasteboard()->writeImage(result);
1469 }
1470
1471 bool Editor::isContinuousSpellCheckingEnabled()
1472 {
1473     if (client())
1474         return client()->isContinuousSpellCheckingEnabled();
1475     return false;
1476 }
1477
1478 void Editor::toggleContinuousSpellChecking()
1479 {
1480     if (client())
1481         client()->toggleContinuousSpellChecking();
1482 }
1483
1484 bool Editor::isGrammarCheckingEnabled()
1485 {
1486     if (client())
1487         return client()->isGrammarCheckingEnabled();
1488     return false;
1489 }
1490
1491 void Editor::toggleGrammarChecking()
1492 {
1493     if (client())
1494         client()->toggleGrammarChecking();
1495 }
1496
1497 int Editor::spellCheckerDocumentTag()
1498 {
1499     if (client())
1500         return client()->spellCheckerDocumentTag();
1501     return 0;
1502 }
1503
1504 bool Editor::shouldEndEditing(Range* range)
1505 {
1506     if (client())
1507         return client()->shouldEndEditing(range);
1508     return false;
1509 }
1510
1511 bool Editor::shouldBeginEditing(Range* range)
1512 {
1513     if (client())
1514         return client()->shouldBeginEditing(range);
1515     return false;
1516 }
1517
1518 void Editor::clearUndoRedoOperations()
1519 {
1520     if (client())
1521         client()->clearUndoRedoOperations();
1522 }
1523
1524 bool Editor::canUndo()
1525 {
1526     if (client())
1527         return client()->canUndo();
1528     return false;
1529 }
1530
1531 void Editor::undo()
1532 {
1533     if (client())
1534         client()->undo();
1535 }
1536
1537 bool Editor::canRedo()
1538 {
1539     if (client())
1540         return client()->canRedo();
1541     return false;
1542 }
1543
1544 void Editor::redo()
1545 {
1546     if (client())
1547         client()->redo();
1548 }
1549
1550 void Editor::didBeginEditing()
1551 {
1552     if (client())
1553         client()->didBeginEditing();
1554 }
1555
1556 void Editor::didEndEditing()
1557 {
1558     if (client())
1559         client()->didEndEditing();
1560 }
1561
1562 void Editor::didWriteSelectionToPasteboard()
1563 {
1564     if (client())
1565         client()->didWriteSelectionToPasteboard();
1566 }
1567
1568 void Editor::toggleBold()
1569 {
1570     execToggleBold(frame(), 0);
1571 }
1572
1573 void Editor::toggleUnderline()
1574 {
1575     ExceptionCode ec = 0;
1576
1577     RefPtr<CSSStyleDeclaration> style = frame()->document()->createCSSStyleDeclaration();
1578     style->setProperty(CSS_PROP__WEBKIT_TEXT_DECORATIONS_IN_EFFECT, "underline", false, ec);
1579     if (selectionStartHasStyle(style.get()))
1580         style->setProperty(CSS_PROP__WEBKIT_TEXT_DECORATIONS_IN_EFFECT, "none", false, ec);
1581     applyStyleToSelection(style.get(), EditActionUnderline);
1582 }
1583
1584 void Editor::setBaseWritingDirection(String direction)
1585 {
1586     ExceptionCode ec = 0;
1587
1588     RefPtr<CSSStyleDeclaration> style = frame()->document()->createCSSStyleDeclaration();
1589     style->setProperty(CSS_PROP_DIRECTION, direction, false, ec);
1590     applyParagraphStyleToSelection(style.get(), EditActionSetWritingDirection);
1591 }
1592
1593 void Editor::selectMarkedText()
1594 {
1595     Range* range = m_frame->markedTextRange();
1596     if (!range)
1597         return;
1598     ExceptionCode ec = 0;
1599     m_frame->selectionController()->setSelectedRange(m_frame->markedTextRange(), DOWNSTREAM, false, ec);
1600 }
1601
1602 void Editor::discardMarkedText()
1603 {
1604     if (!m_frame->markedTextRange())
1605         return;
1606
1607     setIgnoreMarkedTextSelectionChange(true);
1608
1609     selectMarkedText();
1610     unmarkText();
1611 #if PLATFORM(MAC)
1612     if (EditorClient* c = client())
1613         c->markedTextAbandoned(m_frame);
1614 #endif
1615     deleteSelectionWithSmartDelete(false);
1616
1617     setIgnoreMarkedTextSelectionChange(false);
1618 }
1619
1620 #if !PLATFORM(MAC)
1621 void Editor::unmarkText()
1622 {
1623 }
1624 #endif
1625
1626 } // namespace WebCore