1/*
2 * Copyright (C) 2005 Apple Computer, 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 *
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 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#import <WebKit/WebNSEventExtras.h>
30
31@implementation NSEvent (WebExtras)
32
33-(BOOL)_web_isKeyEvent:(unichar)key
34{
35    int type = [self type];
36    if (type != NSKeyDown && type != NSKeyUp)
37        return NO;
38
39    NSString *chars = [self charactersIgnoringModifiers];
40    if ([chars length] != 1)
41        return NO;
42
43    unichar c = [chars characterAtIndex:0];
44    if (c != key)
45        return NO;
46
47    return YES;
48}
49
50- (BOOL)_web_isDeleteKeyEvent
51{
52    const unichar deleteKey = NSDeleteCharacter;
53    const unichar deleteForwardKey = NSDeleteFunctionKey;
54    return [self _web_isKeyEvent:deleteKey] || [self _web_isKeyEvent:deleteForwardKey];
55}
56
57- (BOOL)_web_isEscapeKeyEvent
58{
59    const unichar escapeKey = 0x001b;
60    return [self _web_isKeyEvent:escapeKey];
61}
62
63- (BOOL)_web_isOptionTabKeyEvent
64{
65    return ([self modifierFlags] & NSAlternateKeyMask) && [self _web_isTabKeyEvent];
66}
67
68- (BOOL)_web_isReturnOrEnterKeyEvent
69{
70    const unichar enterKey = NSEnterCharacter;
71    const unichar returnKey = NSCarriageReturnCharacter;
72    return [self _web_isKeyEvent:enterKey] || [self _web_isKeyEvent:returnKey];
73}
74
75- (BOOL)_web_isTabKeyEvent
76{
77    const unichar tabKey = 0x0009;
78    const unichar shiftTabKey = 0x0019;
79    return [self _web_isKeyEvent:tabKey] || [self _web_isKeyEvent:shiftTabKey];
80}
81
82@end
83