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1354d172 AD |
1 | define("dojo/data/util/filter", ["dojo/_base/lang"], function(lang) { |
2 | // module: | |
3 | // dojo/data/util/filter | |
4 | // summary: | |
5 | // TODOC | |
6 | ||
7 | var filter = lang.getObject("dojo.data.util.filter", true); | |
8 | ||
9 | filter.patternToRegExp = function(/*String*/pattern, /*boolean?*/ ignoreCase){ | |
10 | // summary: | |
11 | // Helper function to convert a simple pattern to a regular expression for matching. | |
12 | // description: | |
13 | // Returns a regular expression object that conforms to the defined conversion rules. | |
14 | // For example: | |
15 | // ca* -> /^ca.*$/ | |
16 | // *ca* -> /^.*ca.*$/ | |
17 | // *c\*a* -> /^.*c\*a.*$/ | |
18 | // *c\*a?* -> /^.*c\*a..*$/ | |
19 | // and so on. | |
20 | // | |
21 | // pattern: string | |
22 | // A simple matching pattern to convert that follows basic rules: | |
23 | // * Means match anything, so ca* means match anything starting with ca | |
24 | // ? Means match single character. So, b?b will match to bob and bab, and so on. | |
25 | // \ is an escape character. So for example, \* means do not treat * as a match, but literal character *. | |
26 | // To use a \ as a character in the string, it must be escaped. So in the pattern it should be | |
27 | // represented by \\ to be treated as an ordinary \ character instead of an escape. | |
28 | // | |
29 | // ignoreCase: | |
30 | // An optional flag to indicate if the pattern matching should be treated as case-sensitive or not when comparing | |
31 | // By default, it is assumed case sensitive. | |
32 | ||
33 | var rxp = "^"; | |
34 | var c = null; | |
35 | for(var i = 0; i < pattern.length; i++){ | |
36 | c = pattern.charAt(i); | |
37 | switch(c){ | |
38 | case '\\': | |
39 | rxp += c; | |
40 | i++; | |
41 | rxp += pattern.charAt(i); | |
42 | break; | |
43 | case '*': | |
44 | rxp += ".*"; break; | |
45 | case '?': | |
46 | rxp += "."; break; | |
47 | case '$': | |
48 | case '^': | |
49 | case '/': | |
50 | case '+': | |
51 | case '.': | |
52 | case '|': | |
53 | case '(': | |
54 | case ')': | |
55 | case '{': | |
56 | case '}': | |
57 | case '[': | |
58 | case ']': | |
59 | rxp += "\\"; //fallthrough | |
60 | default: | |
61 | rxp += c; | |
62 | } | |
63 | } | |
64 | rxp += "$"; | |
65 | if(ignoreCase){ | |
66 | return new RegExp(rxp,"mi"); //RegExp | |
67 | }else{ | |
68 | return new RegExp(rxp,"m"); //RegExp | |
69 | } | |
70 | ||
71 | }; | |
72 | ||
73 | return filter; | |
74 | }); |