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      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/v8/ExceptionStatePlaceholder.h"
     30 #include "core/events/BeforeTextInsertedEvent.h"
     31 #include "core/dom/Element.h"
     32 #include "core/dom/Node.h"
     33 #include "core/editing/FrameSelection.h"
     34 #include "core/frame/Frame.h"
     35 
     36 namespace WebCore {
     37 
     38 TextInsertionBaseCommand::TextInsertionBaseCommand(Document& document)
     39     : CompositeEditCommand(document)
     40 {
     41 }
     42 
     43 void TextInsertionBaseCommand::applyTextInsertionCommand(Frame* frame, PassRefPtr<TextInsertionBaseCommand> command, const VisibleSelection& selectionForInsertion, const VisibleSelection& endingSelection)
     44 {
     45     bool changeSelection = 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             RefPtr<BeforeTextInsertedEvent> evt = BeforeTextInsertedEvent::create(text);
     67             startNode->rootEditableElement()->dispatchEvent(evt, IGNORE_EXCEPTION);
     68             newText = evt->text();
     69         }
     70     }
     71     return newText;
     72 }
     73 
     74 bool canAppendNewLineFeedToSelection(const VisibleSelection& selection)
     75 {
     76     Node* node = selection.rootEditableElement();
     77     if (!node)
     78         return false;
     79 
     80     RefPtr<BeforeTextInsertedEvent> event = BeforeTextInsertedEvent::create(String("\n"));
     81     node->dispatchEvent(event, IGNORE_EXCEPTION);
     82     return event->text().length();
     83 }
     84 
     85 }
     86