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      1 /*
      2  * Copyright (C) 2005, 2007, 2008, 2011 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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #import "WebNSAttributedStringExtras.h"
     27 
     28 namespace WebCore {
     29 
     30 NSAttributedString *attributedStringByStrippingAttachmentCharacters(NSAttributedString *attributedString)
     31 {
     32     NSRange attachmentRange;
     33     NSString *originalString = [attributedString string];
     34     static NSString *attachmentCharString = nil;
     35 
     36     if (!attachmentCharString) {
     37         unichar chars[2];
     38         if (!attachmentCharString) {
     39             chars[0] = NSAttachmentCharacter;
     40             chars[1] = 0;
     41             attachmentCharString = [[NSString alloc] initWithCharacters:chars length:1];
     42         }
     43     }
     44 
     45     attachmentRange = [originalString rangeOfString:attachmentCharString];
     46     if (attachmentRange.location != NSNotFound && attachmentRange.length > 0) {
     47         NSMutableAttributedString *newAttributedString = [[attributedString mutableCopyWithZone:NULL] autorelease];
     48 
     49         while (attachmentRange.location != NSNotFound && attachmentRange.length > 0) {
     50             [newAttributedString replaceCharactersInRange:attachmentRange withString:@""];
     51             attachmentRange = [[newAttributedString string] rangeOfString:attachmentCharString];
     52         }
     53         return newAttributedString;
     54     }
     55 
     56     return attributedString;
     57 }
     58 
     59 }
     60