third_party/WebKit/Source/core/editing/TextInsertionBaseCommand.cpp

   1 /*
   2  * Copyright (C) 2012 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "core/editing/TextInsertionBaseCommand.h"
  28
  29 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
  30 #include "core/dom/Element.h"
  31 #include "core/dom/Node.h"
  32 #include "core/editing/FrameSelection.h"
  33 #include "core/events/BeforeTextInsertedEvent.h"
  34 #include "core/frame/LocalFrame.h"
  35
  36 namespace blink {
  37
  38 TextInsertionBaseCommand::TextInsertionBaseCommand(Document& document)
  39     : CompositeEditCommand(document)
  40 {
  41 }
  42
  43 void TextInsertionBaseCommand::applyTextInsertionCommand(LocalFrame* frame, PassRefPtrWillBeRawPtr<TextInsertionBaseCommand> command, const VisibleSelection& selectionForInsertion, const VisibleSelection& endingSelection)
  44 {
  45     bool changeSelection = !VisibleSelection::InDOMTree::equalSelections(selectionForInsertion, endingSelection);
  46     if (changeSelection) {
  47         command->setStartingSelection(selectionForInsertion);
  48         command->setEndingSelection(selectionForInsertion);
  49     }
  50     command->apply();
  51     if (changeSelection) {
  52         command->setEndingSelection(endingSelection);
  53         frame->selection().setSelection(endingSelection);
  54     }
  55 }
  56
  57 String dispatchBeforeTextInsertedEvent(const String& text, const VisibleSelection& selectionForInsertion, bool insertionIsForUpdatingComposition)
  58 {
  59     if (insertionIsForUpdatingComposition)
  60         return text;
  61
  62     String newText = text;
  63     if (Node* startNode = selectionForInsertion.start().containerNode()) {
  64         if (startNode->rootEditableElement()) {
  65             // Send BeforeTextInsertedEvent. The event handler will update text if necessary.
  66             RefPtrWillBeRawPtr<BeforeTextInsertedEvent> evt = BeforeTextInsertedEvent::create(text);
  67             startNode->rootEditableElement()->dispatchEvent(evt);
  68             newText = evt->text();
  69         }
  70     }
  71     return newText;
  72 }
  73
  74 bool canAppendNewLineFeedToSelection(const VisibleSelection& selection)
  75 {
  76     Element* element = selection.rootEditableElement();
  77     if (!element)
  78         return false;
  79
  80     RefPtrWillBeRawPtr<BeforeTextInsertedEvent> event = BeforeTextInsertedEvent::create(String("\n"));
  81     element->dispatchEvent(event);
  82     return event->text().length();
  83 }
  84
  85 }