zxing/iphone/ZXingWidget/Classes/NSString+HTML.m
2010-05-22 07:37:46 +00:00

71 lines
1.9 KiB
Objective-C

//
// NSString+HTML.m
// ZXing
//
// Created by Christian Brunschen on 28/05/2008.
/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "NSString+HTML.h"
@implementation NSString (HTMLExtensions)
static NSDictionary *htmlEscapes = nil;
static NSDictionary *htmlUnescapes = nil;
+ (NSDictionary *)htmlEscapes {
if (!htmlEscapes) {
htmlEscapes = [[NSDictionary alloc] initWithObjectsAndKeys:
@"&", @"&",
@"&lt;", @"<",
@"&gt;", @">",
nil
];
}
return htmlEscapes;
}
+ (NSDictionary *)htmlUnescapes {
if (!htmlUnescapes) {
htmlUnescapes = [[NSDictionary alloc] initWithObjectsAndKeys:
@"&", @"&amp;",
@"<", @"&lt;",
@">", @"&gt;",
nil
];
}
return htmlEscapes;
}
static NSString *replaceAll(NSString *s, NSDictionary *replacements) {
for (NSString *key in replacements) {
NSString *replacement = [replacements objectForKey:key];
s = [s stringByReplacingOccurrencesOfString:key withString:replacement];
}
return s;
}
- (NSString *)htmlEscapedString {
return replaceAll(self, [[self class] htmlEscapes]);
}
- (NSString *)htmlUnescapedString {
return replaceAll(self, [[self class] htmlUnescapes]);
}
@end