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71 lines
2.0 KiB
JavaScript
71 lines
2.0 KiB
JavaScript
12 years ago
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define("dojo/regexp", ["./_base/kernel", "./_base/lang"], function(dojo, lang){
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// module:
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// dojo/regexp
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var regexp = {
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// summary:
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// Regular expressions and Builder resources
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};
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lang.setObject("dojo.regexp", regexp);
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regexp.escapeString = function(/*String*/str, /*String?*/except){
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// summary:
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// Adds escape sequences for special characters in regular expressions
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// except:
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// a String with special characters to be left unescaped
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return str.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, function(ch){
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if(except && except.indexOf(ch) != -1){
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return ch;
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}
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return "\\" + ch;
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}); // String
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};
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regexp.buildGroupRE = function(/*Object|Array*/arr, /*Function*/re, /*Boolean?*/nonCapture){
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// summary:
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// Builds a regular expression that groups subexpressions
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// description:
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// A utility function used by some of the RE generators. The
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// subexpressions are constructed by the function, re, in the second
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// parameter. re builds one subexpression for each elem in the array
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// a, in the first parameter. Returns a string for a regular
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// expression that groups all the subexpressions.
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// arr:
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// A single value or an array of values.
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// re:
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// A function. Takes one parameter and converts it to a regular
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// expression.
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// nonCapture:
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// If true, uses non-capturing match, otherwise matches are retained
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// by regular expression. Defaults to false
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// case 1: a is a single value.
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if(!(arr instanceof Array)){
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return re(arr); // String
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}
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// case 2: a is an array
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var b = [];
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for(var i = 0; i < arr.length; i++){
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// convert each elem to a RE
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b.push(re(arr[i]));
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}
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// join the REs as alternatives in a RE group.
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return regexp.group(b.join("|"), nonCapture); // String
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};
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regexp.group = function(/*String*/expression, /*Boolean?*/nonCapture){
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// summary:
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// adds group match to expression
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// nonCapture:
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// If true, uses non-capturing match, otherwise matches are retained
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// by regular expression.
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return "(" + (nonCapture ? "?:":"") + expression + ")"; // String
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};
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return regexp;
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});
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