third_party/WebKit/Source/platform/PlatformKeyboardEvent.cpp

   1 /*
   2  * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
   3  * Copyright (C) 2008, 2009 Google Inc.
   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 "platform/PlatformKeyboardEvent.h"
  29
  30 #if OS(WIN)
  31 #include <windows.h>
  32 #elif OS(MACOSX)
  33 #import <Carbon/Carbon.h>
  34 #else
  35 #include "platform/NotImplemented.h"
  36 #endif
  37
  38 namespace blink {
  39
  40 #if OS(WIN)
  41 static const unsigned short HIGHBITMASKSHORT = 0x8000;
  42 #endif
  43
  44 PlatformKeyboardEvent::OverrideCapsLockState PlatformKeyboardEvent::s_overrideCapsLockState =
  45     PlatformKeyboardEvent::OverrideCapsLockState::Default;
  46
  47 void PlatformKeyboardEvent::disambiguateKeyDownEvent(Type type)
  48 {
  49 #if OS(WIN)
  50     // No KeyDown events on Windows to disambiguate.
  51     ASSERT_NOT_REACHED();
  52 #else
  53     // Can only change type from KeyDown to RawKeyDown or Char, as we lack information for other conversions.
  54     ASSERT(m_type == PlatformEvent::KeyDown);
  55     ASSERT(type == PlatformEvent::RawKeyDown || type == PlatformEvent::Char);
  56     m_type = type;
  57
  58     if (type == RawKeyDown) {
  59         m_text = String();
  60         m_unmodifiedText = String();
  61     } else {
  62         m_keyIdentifier = String();
  63         m_windowsVirtualKeyCode = 0;
  64 #if OS(MACOSX)
  65         if (m_text.length() == 1 && (m_text[0U] >= 0xF700 && m_text[0U] <= 0xF7FF)) {
  66             // According to NSEvents.h, OpenStep reserves the range 0xF700-0xF8FF for function keys. However, some actual private use characters
  67             // happen to be in this range, e.g. the Apple logo (Option+Shift+K).
  68             // 0xF7FF is an arbitrary cut-off.
  69             m_text = String();
  70             m_unmodifiedText = String();
  71         }
  72 #endif
  73     }
  74 #endif
  75 }
  76
  77 bool PlatformKeyboardEvent::currentCapsLockState()
  78 {
  79     switch (s_overrideCapsLockState) {
  80     case OverrideCapsLockState::Default:
  81 #if OS(WIN)
  82             // FIXME: Does this even work inside the sandbox?
  83             return GetKeyState(VK_CAPITAL) & 1;
  84 #elif OS(MACOSX)
  85             return GetCurrentKeyModifiers() & alphaLock;
  86 #else
  87             notImplemented();
  88             return false;
  89 #endif
  90     case OverrideCapsLockState::On:
  91         return true;
  92     case OverrideCapsLockState::Off:
  93     default:
  94         return false;
  95     }
  96 }
  97
  98 void PlatformKeyboardEvent::getCurrentModifierState(bool& shiftKey, bool& ctrlKey, bool& altKey, bool& metaKey)
  99 {
 100 #if OS(WIN)
 101     shiftKey = GetKeyState(VK_SHIFT) & HIGHBITMASKSHORT;
 102     ctrlKey = GetKeyState(VK_CONTROL) & HIGHBITMASKSHORT;
 103     altKey = GetKeyState(VK_MENU) & HIGHBITMASKSHORT;
 104     metaKey = false;
 105 #elif OS(MACOSX)
 106     UInt32 currentModifiers = GetCurrentKeyModifiers();
 107     shiftKey = currentModifiers & ::shiftKey;
 108     ctrlKey = currentModifiers & ::controlKey;
 109     altKey = currentModifiers & ::optionKey;
 110     metaKey = currentModifiers & ::cmdKey;
 111 #else
 112     shiftKey = false;
 113     ctrlKey = false;
 114     altKey = false;
 115     metaKey = false;
 116     notImplemented();
 117 #endif
 118 }
 119
 120 } // namespace blink