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

   1 /*
   2  * Copyright (C) 2006, 2007 Apple, Inc.  All rights reserved.
   3  * Copyright (C) 2012 Google, Inc.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28 #include "core/editing/Editor.h"
  29
  30 #include "core/events/KeyboardEvent.h"
  31 #include "core/frame/LocalFrame.h"
  32 #include "core/page/EditorClient.h"
  33 #include "platform/PlatformKeyboardEvent.h"
  34
  35 namespace blink {
  36
  37 bool Editor::handleEditingKeyboardEvent(KeyboardEvent* evt)
  38 {
  39     const PlatformKeyboardEvent* keyEvent = evt->keyEvent();
  40     // do not treat this as text input if it's a system key event
  41     if (!keyEvent || keyEvent->isSystemKey())
  42         return false;
  43
  44     String commandName = behavior().interpretKeyEvent(*evt);
  45     Command command = this->command(commandName);
  46
  47     if (keyEvent->type() == PlatformEvent::RawKeyDown) {
  48         // WebKit doesn't have enough information about mode to decide how
  49         // commands that just insert text if executed via Editor should be treated,
  50         // so we leave it upon WebCore to either handle them immediately
  51         // (e.g. Tab that changes focus) or let a keypress event be generated
  52         // (e.g. Tab that inserts a Tab character, or Enter).
  53         if (command.isTextInsertion() || commandName.isEmpty())
  54             return false;
  55         return command.execute(evt);
  56     }
  57
  58     if (command.execute(evt))
  59         return true;
  60
  61     if (!behavior().shouldInsertCharacter(*evt) || !canEdit())
  62         return false;
  63
  64     return insertText(evt->keyEvent()->text(), evt);
  65 }
  66
  67 void Editor::handleKeyboardEvent(KeyboardEvent* evt)
  68 {
  69     // Give the embedder a chance to handle the keyboard event.
  70     if (client().handleKeyboardEvent() || handleEditingKeyboardEvent(evt))
  71         evt->setDefaultHandled();
  72 }
  73
  74 } // namespace blink