a scan widget you can include in your iPhone app. Test app coming shortly.

[zxing.git] / iphone / ZXingWidget / NSString+HTML.m

diff --git a/iphone/ZXingWidget/NSString+HTML.m b/iphone/ZXingWidget/NSString+HTML.m
new file mode 100644 (file)
index 0000000..98c45d4
--- /dev/null
+++ b/iphone/ZXingWidget/NSString+HTML.m
@@ -0,0 +1,70 @@
+//
+//  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