2 YUI 3.13.0 (build 508226d)
3 Copyright 2013 Yahoo! Inc. All rights reserved.
4 Licensed under the BSD License.
5 http://yuilibrary.com/license/
8 YUI.add('highlight-accentfold', function (Y, NAME) {
11 Adds accent-folding highlighters to `Y.Highlight`.
14 @submodule highlight-accentfold
22 var AccentFold = Y.Text.AccentFold,
27 Highlight = Y.mix(Y.Highlight, {
28 // -- Public Static Methods ------------------------------------------------
31 Accent-folding version of `all()`.
34 @param {String} haystack String to apply highlighting to.
35 @param {String|String[]} needles String or array of strings that should be
37 @param {Object} [options] Options object.
38 @param {Boolean} [options.startsWith=false] If `true`, matches must be
39 anchored to the beginning of the string.
40 @return {String} Escaped and highlighted copy of _haystack_.
43 allFold: function (haystack, needles, options) {
44 var template = Highlight._TEMPLATE,
47 chunk, i, len, match, result;
50 // This tells Highlight.all() not to escape HTML, in order to ensure
51 // usable match offsets. The output of all() is discarded, and we
52 // perform our own escaping before returning the highlighted string.
55 // While the highlight regex operates on the accent-folded strings,
56 // this replacer will highlight the matched positions in the
59 // Note: this implementation doesn't handle multi-character folds,
60 // like "æ" -> "ae". Doing so correctly would be prohibitively
61 // expensive both in terms of code size and runtime performance, so
62 // I've chosen to take the pragmatic route and just not do it at
63 // all. This is one of many reasons why accent folding is best done
65 replacer: function (match, p1, foldedNeedle, pos) {
68 // Ignore matches inside HTML entities.
69 if (p1 && !(/\s/).test(foldedNeedle)) {
73 len = foldedNeedle.length;
76 haystack.substring(startPos, pos), // substring between previous match and this match
77 haystack.substr(pos, len) // match to be highlighted
82 }, options || EMPTY_OBJECT);
84 // Run the highlighter on the folded strings. We don't care about the
85 // output; our replacer function will build the canonical highlighted
86 // string, with original accented characters.
87 Highlight.all(AccentFold.fold(haystack), AccentFold.fold(needles), options);
89 // Tack on the remainder of the haystack that wasn't highlighted, if
91 if (startPos < haystack.length) {
92 results.push([haystack.substr(startPos)]);
95 // Highlight and escape the string.
96 for (i = 0, len = results.length; i < len; ++i) {
97 chunk = Escape.html(results[i][0]);
99 if ((match = results[i][1])) {
100 chunk += template.replace(/\{s\}/g, Escape.html(match));
106 return results.join('');
110 Accent-folding version of `start()`.
113 @param {String} haystack String to apply highlighting to.
114 @param {String|String[]} needles String or array of strings that should be
116 @return {String} Escaped and highlighted copy of _haystack_.
119 startFold: function (haystack, needles) {
120 return Highlight.allFold(haystack, needles, {startsWith: true});
124 Accent-folding version of `words()`.
127 @param {String} haystack String to apply highlighting to.
128 @param {String|String[]} needles String or array of strings containing words
129 that should be highlighted. If a string is passed, it will be split
130 into words; if an array is passed, it is assumed to have already been
132 @return {String} Escaped and highlighted copy of _haystack_.
135 wordsFold: function (haystack, needles) {
136 var template = Highlight._TEMPLATE;
138 return Highlight.words(haystack, AccentFold.fold(needles), {
139 mapper: function (word, needles) {
140 if (needles.hasOwnProperty(AccentFold.fold(word))) {
141 return template.replace(/\{s\}/g, Escape.html(word));
144 return Escape.html(word);
151 }, '3.13.0', {"requires": ["highlight-base", "text-accentfold"]});