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      1 /*
      2  * Copyright (C) 2007 Apple 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 "WebNSArrayExtras.h"
     30 
     31 #import <wtf/Assertions.h>
     32 
     33 @implementation NSArray (WebNSArrayExtras)
     34 
     35 -(NSNumber *)_webkit_numberAtIndex:(NSUInteger)index
     36 {
     37     id object = [self objectAtIndex:index];
     38     return [object isKindOfClass:[NSNumber class]] ? object : nil;
     39 }
     40 
     41 -(NSString *)_webkit_stringAtIndex:(NSUInteger)index
     42 {
     43     id object = [self objectAtIndex:index];
     44     return [object isKindOfClass:[NSString class]] ? object : nil;
     45 }
     46 
     47 @end
     48 
     49 @implementation NSMutableArray (WebNSArrayExtras)
     50 
     51 - (void)_webkit_removeUselessMenuItemSeparators
     52 {
     53     // Starting with a mutable array of NSMenuItems, removes any separators at the start,
     54     // removes any separators at the end, and collapses any other adjacent separators to
     55     // a single separator.
     56 
     57     int index;
     58     // Start this with YES so very last item will be removed if it's a separator.
     59     BOOL removePreviousItemIfSeparator = YES;
     60     for (index = [self count] - 1; index >= 0; --index) {
     61         NSMenuItem *item = [self objectAtIndex:index];
     62         ASSERT([item isKindOfClass:[NSMenuItem class]]);
     63         BOOL itemIsSeparator = [item isSeparatorItem];
     64         if (itemIsSeparator && (removePreviousItemIfSeparator || index == 0))
     65             [self removeObjectAtIndex:index];
     66         removePreviousItemIfSeparator = itemIsSeparator;
     67     }
     68 
     69     // This could leave us with one initial separator; kill it off too
     70     if ([self count] && [[self objectAtIndex:0] isSeparatorItem])
     71         [self removeObjectAtIndex:0];
     72 }
     73 
     74 @end
     75