/*

 * Copyright (C) 2005 Apple Computer, Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer. 

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#import <WebKit/WebNSEventExtras.h>

@implementation NSEvent (WebExtras)

-(BOOL)_web_isKeyEvent:(unichar)key

{

    int type = [self type];

    if (type != NSKeyDown && type != NSKeyUp)

        return NO;

    NSString *chars = [self charactersIgnoringModifiers];

    if ([chars length] != 1)

        return NO;

    unichar c = [chars characterAtIndex:0];

    if (c != key)

        return NO;

    return YES;

}

- (BOOL)_web_isDeleteKeyEvent

{

    const unichar deleteKey = NSDeleteCharacter;

    const unichar deleteForwardKey = NSDeleteFunctionKey;

    return [self _web_isKeyEvent:deleteKey] || [self _web_isKeyEvent:deleteForwardKey];

}

- (BOOL)_web_isEscapeKeyEvent

{

    const unichar escapeKey = 0x001b;

    return [self _web_isKeyEvent:escapeKey];

}

- (BOOL)_web_isOptionTabKeyEvent

{

    return ([self modifierFlags] & NSAlternateKeyMask) && [self _web_isTabKeyEvent];

}

- (BOOL)_web_isReturnOrEnterKeyEvent

{

    const unichar enterKey = NSEnterCharacter;

    const unichar returnKey = NSCarriageReturnCharacter;

    return [self _web_isKeyEvent:enterKey] || [self _web_isKeyEvent:returnKey];

}

- (BOOL)_web_isTabKeyEvent

{

    const unichar tabKey = 0x0009;

    const unichar shiftTabKey = 0x0019;

    return [self _web_isKeyEvent:tabKey] || [self _web_isKeyEvent:shiftTabKey];

}

@end