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