source: code/Website/open-flash-chart/com/adobe/utils/StringUtil.as@ 7849

Last change on this file since 7849 was 7849, checked in by dennisw, 15 years ago
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[7849]1/*
2 Adobe Systems Incorporated(r) Source Code License Agreement
3 Copyright(c) 2005 Adobe Systems Incorporated. All rights reserved.
4
5 Please read this Source Code License Agreement carefully before using
6 the source code.
7
8 Adobe Systems Incorporated grants to you a perpetual, worldwide, non-exclusive,
9 no-charge, royalty-free, irrevocable copyright license, to reproduce,
10 prepare derivative works of, publicly display, publicly perform, and
11 distribute this source code and such derivative works in source or
12 object code form without any attribution requirements.
13
14 The name "Adobe Systems Incorporated" must not be used to endorse or promote products
15 derived from the source code without prior written permission.
16
17 You agree to indemnify, hold harmless and defend Adobe Systems Incorporated from and
18 against any loss, damage, claims or lawsuits, including attorney's
19 fees that arise or result from your use or distribution of the source
20 code.
21
22 THIS SOURCE CODE IS PROVIDED "AS IS" AND "WITH ALL FAULTS", WITHOUT
23 ANY TECHNICAL SUPPORT OR ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
24 BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ALSO, THERE IS NO WARRANTY OF
26 NON-INFRINGEMENT, TITLE OR QUIET ENJOYMENT. IN NO EVENT SHALL MACROMEDIA
27 OR ITS SUPPLIERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
28 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
30 OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOURCE CODE, EVEN IF
33 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34*/
35
36package com.adobe.utils
37{
38
39 /**
40 * Class that contains static utility methods for manipulating Strings.
41 *
42 * @langversion ActionScript 3.0
43 * @playerversion Flash 9.0
44 * @tiptext
45 */
46 public class StringUtil
47 {
48
49
50 /**
51 * Does a case insensitive compare or two strings and returns true if
52 * they are equal.
53 *
54 * @param s1 The first string to compare.
55 *
56 * @param s2 The second string to compare.
57 *
58 * @returns A boolean value indicating whether the strings' values are
59 * equal in a case sensitive compare.
60 *
61 * @langversion ActionScript 3.0
62 * @playerversion Flash 9.0
63 * @tiptext
64 */
65 public static function stringsAreEqual(s1:String, s2:String,
66 caseSensitive:Boolean):Boolean
67 {
68 if(caseSensitive)
69 {
70 return (s1 == s2);
71 }
72 else
73 {
74 return (s1.toUpperCase() == s2.toUpperCase());
75 }
76 }
77
78 /**
79 * Removes whitespace from the front and the end of the specified
80 * string.
81 *
82 * @param input The String whose beginning and ending whitespace will
83 * will be removed.
84 *
85 * @returns A String with whitespace removed from the begining and end
86 *
87 * @langversion ActionScript 3.0
88 * @playerversion Flash 9.0
89 * @tiptext
90 */
91 public static function trim(input:String):String
92 {
93 return StringUtil.ltrim(StringUtil.rtrim(input));
94 }
95
96 /**
97 * Removes whitespace from the front of the specified string.
98 *
99 * @param input The String whose beginning whitespace will will be removed.
100 *
101 * @returns A String with whitespace removed from the begining
102 *
103 * @langversion ActionScript 3.0
104 * @playerversion Flash 9.0
105 * @tiptext
106 */
107 public static function ltrim(input:String):String
108 {
109 var size:Number = input.length;
110 for(var i:Number = 0; i < size; i++)
111 {
112 if(input.charCodeAt(i) > 32)
113 {
114 return input.substring(i);
115 }
116 }
117 return "";
118 }
119
120 /**
121 * Removes whitespace from the end of the specified string.
122 *
123 * @param input The String whose ending whitespace will will be removed.
124 *
125 * @returns A String with whitespace removed from the end
126 *
127 * @langversion ActionScript 3.0
128 * @playerversion Flash 9.0
129 * @tiptext
130 */
131 public static function rtrim(input:String):String
132 {
133 var size:Number = input.length;
134 for(var i:Number = size; i > 0; i--)
135 {
136 if(input.charCodeAt(i - 1) > 32)
137 {
138 return input.substring(0, i);
139 }
140 }
141
142 return "";
143 }
144
145 /**
146 * Determines whether the specified string begins with the spcified prefix.
147 *
148 * @param input The string that the prefix will be checked against.
149 *
150 * @param prefix The prefix that will be tested against the string.
151 *
152 * @returns True if the string starts with the prefix, false if it does not.
153 *
154 * @langversion ActionScript 3.0
155 * @playerversion Flash 9.0
156 * @tiptext
157 */
158 public static function beginsWith(input:String, prefix:String):Boolean
159 {
160 return (prefix == input.substring(0, prefix.length));
161 }
162
163 /**
164 * Determines whether the specified string ends with the spcified suffix.
165 *
166 * @param input The string that the suffic will be checked against.
167 *
168 * @param prefix The suffic that will be tested against the string.
169 *
170 * @returns True if the string ends with the suffix, false if it does not.
171 *
172 * @langversion ActionScript 3.0
173 * @playerversion Flash 9.0
174 * @tiptext
175 */
176 public static function endsWith(input:String, suffix:String):Boolean
177 {
178 return (suffix == input.substring(input.length - suffix.length));
179 }
180
181 /**
182 * Removes all instances of the remove string in the input string.
183 *
184 * @param input The string that will be checked for instances of remove
185 * string
186 *
187 * @param remove The string that will be removed from the input string.
188 *
189 * @returns A String with the remove string removed.
190 *
191 * @langversion ActionScript 3.0
192 * @playerversion Flash 9.0
193 * @tiptext
194 */
195 public static function remove(input:String, remove:String):String
196 {
197 return StringUtil.replace(input, remove, "");
198 }
199
200 /**
201 * Replaces all instances of the replace string in the input string
202 * with the replaceWith string.
203 *
204 * @param input The string that instances of replace string will be
205 * replaces with removeWith string.
206 *
207 * @param replace The string that will be replaced by instances of
208 * the replaceWith string.
209 *
210 * @param replaceWith The string that will replace instances of replace
211 * string.
212 *
213 * @returns A new String with the replace string replaced with the
214 * replaceWith string.
215 *
216 * @langversion ActionScript 3.0
217 * @playerversion Flash 9.0
218 * @tiptext
219 */
220 public static function replace(input:String, replace:String, replaceWith:String):String
221 {
222 //change to StringBuilder
223 var sb:String = new String();
224 var found:Boolean = false;
225
226 var sLen:Number = input.length;
227 var rLen:Number = replace.length;
228
229 for (var i:Number = 0; i < sLen; i++)
230 {
231 if(input.charAt(i) == replace.charAt(0))
232 {
233 found = true;
234 for(var j:Number = 0; j < rLen; j++)
235 {
236 if(!(input.charAt(i + j) == replace.charAt(j)))
237 {
238 found = false;
239 break;
240 }
241 }
242
243 if(found)
244 {
245 sb += replaceWith;
246 i = i + (rLen - 1);
247 continue;
248 }
249 }
250 sb += input.charAt(i);
251 }
252 //TODO : if the string is not found, should we return the original
253 //string?
254 return sb;
255 }
256 }
257}
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