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