| 1 |
efrain |
1 |
YUI.add('intl-base', function (Y, NAME) {
|
|
|
2 |
|
|
|
3 |
/**
|
|
|
4 |
* The Intl utility provides a central location for managing sets of
|
|
|
5 |
* localized resources (strings and formatting patterns).
|
|
|
6 |
*
|
|
|
7 |
* @class Intl
|
|
|
8 |
* @uses EventTarget
|
|
|
9 |
* @static
|
|
|
10 |
*/
|
|
|
11 |
|
|
|
12 |
var SPLIT_REGEX = /[, ]/;
|
|
|
13 |
|
|
|
14 |
Y.mix(Y.namespace('Intl'), {
|
|
|
15 |
|
|
|
16 |
/**
|
|
|
17 |
* Returns the language among those available that
|
|
|
18 |
* best matches the preferred language list, using the Lookup
|
|
|
19 |
* algorithm of BCP 47.
|
|
|
20 |
* If none of the available languages meets the user's preferences,
|
|
|
21 |
* then "" is returned.
|
|
|
22 |
* Extended language ranges are not supported.
|
|
|
23 |
*
|
|
|
24 |
* @method lookupBestLang
|
|
|
25 |
* @param {String[] | String} preferredLanguages The list of preferred
|
|
|
26 |
* languages in descending preference order, represented as BCP 47
|
|
|
27 |
* language tags. A string array or a comma-separated list.
|
|
|
28 |
* @param {String[]} availableLanguages The list of languages
|
|
|
29 |
* that the application supports, represented as BCP 47 language
|
|
|
30 |
* tags.
|
|
|
31 |
*
|
|
|
32 |
* @return {String} The available language that best matches the
|
|
|
33 |
* preferred language list, or "".
|
|
|
34 |
* @since 3.1.0
|
|
|
35 |
*/
|
|
|
36 |
lookupBestLang: function(preferredLanguages, availableLanguages) {
|
|
|
37 |
|
|
|
38 |
var i, language, result, index;
|
|
|
39 |
|
|
|
40 |
// check whether the list of available languages contains language;
|
|
|
41 |
// if so return it
|
|
|
42 |
function scan(language) {
|
|
|
43 |
var i;
|
|
|
44 |
for (i = 0; i < availableLanguages.length; i += 1) {
|
|
|
45 |
if (language.toLowerCase() ===
|
|
|
46 |
availableLanguages[i].toLowerCase()) {
|
|
|
47 |
return availableLanguages[i];
|
|
|
48 |
}
|
|
|
49 |
}
|
|
|
50 |
}
|
|
|
51 |
|
|
|
52 |
if (Y.Lang.isString(preferredLanguages)) {
|
|
|
53 |
preferredLanguages = preferredLanguages.split(SPLIT_REGEX);
|
|
|
54 |
}
|
|
|
55 |
|
|
|
56 |
for (i = 0; i < preferredLanguages.length; i += 1) {
|
|
|
57 |
language = preferredLanguages[i];
|
|
|
58 |
if (!language || language === '*') {
|
|
|
59 |
continue;
|
|
|
60 |
}
|
|
|
61 |
// check the fallback sequence for one language
|
|
|
62 |
while (language.length > 0) {
|
|
|
63 |
result = scan(language);
|
|
|
64 |
if (result) {
|
|
|
65 |
return result;
|
|
|
66 |
} else {
|
|
|
67 |
index = language.lastIndexOf('-');
|
|
|
68 |
if (index >= 0) {
|
|
|
69 |
language = language.substring(0, index);
|
|
|
70 |
// one-character subtags get cut along with the
|
|
|
71 |
// following subtag
|
|
|
72 |
if (index >= 2 && language.charAt(index - 2) === '-') {
|
|
|
73 |
language = language.substring(0, index - 2);
|
|
|
74 |
}
|
|
|
75 |
} else {
|
|
|
76 |
// nothing available for this language
|
|
|
77 |
break;
|
|
|
78 |
}
|
|
|
79 |
}
|
|
|
80 |
}
|
|
|
81 |
}
|
|
|
82 |
|
|
|
83 |
return '';
|
|
|
84 |
}
|
|
|
85 |
});
|
|
|
86 |
|
|
|
87 |
|
|
|
88 |
}, '3.18.1', {"requires": ["yui-base"]});
|