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/*
YUI 3.17.2 (build 9c3c78e)
Copyright 2014 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
http://yuilibrary.com/license/
*/
YUI.add('highlight-accentfold', function (Y, NAME) {
/**
Adds accent-folding highlighters to `Y.Highlight`.
@module highlight
@submodule highlight-accentfold
**/
/**
@class Highlight
@static
**/
var AccentFold = Y.Text.AccentFold,
Escape = Y.Escape,
EMPTY_OBJECT = {},
Highlight = Y.mix(Y.Highlight, {
// -- Public Static Methods ------------------------------------------------
/**
Accent-folding version of `all()`.
@method allFold
@param {String} haystack String to apply highlighting to.
@param {String|String[]} needles String or array of strings that should be
highlighted.
@param {Object} [options] Options object.
@param {Boolean} [options.startsWith=false] If `true`, matches must be
anchored to the beginning of the string.
@return {String} Escaped and highlighted copy of _haystack_.
@static
**/
allFold: function (haystack, needles, options) {
var template = Highlight._TEMPLATE,
results = [],
startPos = 0,
chunk, i, len, match, result;
options = Y.merge({
// This tells Highlight.all() not to escape HTML, in order to ensure
// usable match offsets. The output of all() is discarded, and we
// perform our own escaping before returning the highlighted string.
escapeHTML: false,
// While the highlight regex operates on the accent-folded strings,
// this replacer will highlight the matched positions in the
// original string.
//
// Note: this implementation doesn't handle multi-character folds,
// like "æ" -> "ae". Doing so correctly would be prohibitively
// expensive both in terms of code size and runtime performance, so
// I've chosen to take the pragmatic route and just not do it at
// all. This is one of many reasons why accent folding is best done
// on the server.
replacer: function (match, p1, foldedNeedle, pos) {
var len;
// Ignore matches inside HTML entities.
if (p1 && !(/\s/).test(foldedNeedle)) {
return match;
}
len = foldedNeedle.length;
results.push([
haystack.substring(startPos, pos), // substring between previous match and this match
haystack.substr(pos, len) // match to be highlighted
]);
startPos = pos + len;
}
}, options || EMPTY_OBJECT);
// Run the highlighter on the folded strings. We don't care about the
// output; our replacer function will build the canonical highlighted
// string, with original accented characters.
Highlight.all(AccentFold.fold(haystack), AccentFold.fold(needles), options);
// Tack on the remainder of the haystack that wasn't highlighted, if
// any.
if (startPos < haystack.length) {
results.push([haystack.substr(startPos)]);
}
// Highlight and escape the string.
for (i = 0, len = results.length; i < len; ++i) {
chunk = Escape.html(results[i][0]);
if ((match = results[i][1])) {
chunk += template.replace(/\{s\}/g, Escape.html(match));
}
results[i] = chunk;
}
return results.join('');
},
/**
Accent-folding version of `start()`.
@method startFold
@param {String} haystack String to apply highlighting to.
@param {String|String[]} needles String or array of strings that should be
highlighted.
@return {String} Escaped and highlighted copy of _haystack_.
@static
**/
startFold: function (haystack, needles) {
return Highlight.allFold(haystack, needles, {startsWith: true});
},
/**
Accent-folding version of `words()`.
@method wordsFold
@param {String} haystack String to apply highlighting to.
@param {String|String[]} needles String or array of strings containing words
that should be highlighted. If a string is passed, it will be split
into words; if an array is passed, it is assumed to have already been
split.
@return {String} Escaped and highlighted copy of _haystack_.
@static
**/
wordsFold: function (haystack, needles) {
var template = Highlight._TEMPLATE;
return Highlight.words(haystack, AccentFold.fold(needles), {
mapper: function (word, needles) {
if (needles.hasOwnProperty(AccentFold.fold(word))) {
return template.replace(/\{s\}/g, Escape.html(word));
}
return Escape.html(word);
}
});
}
});
}, '3.17.2', {"requires": ["highlight-base", "text-accentfold"]});