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/**
* @fileOverview
* A UI script helper that provides search word highlight.
* Almost all code came from Sphinx
* @author Yoshiki Shibukawa, yoshiki@shibu.jp
*/
(function ($)
{
/**
* small helper function to urldecode strings
*/
function urldecode(x)
{
return decodeURIComponent(x).replace(/\+/g, ' ');
}
/**
* This function returns the parsed url parameters of the
* current request. Multiple values per key are supported,
* it will always return arrays of strings for the value parts.
*/
function getQueryParameters(s)
{
if (typeof s == 'undefined')
s = document.location.search;
var parts = s.substr(s.indexOf('?') + 1).split('&');
var result = {};
for (var i = 0; i < parts.length; i++)
{
var tmp = parts[i].split('=', 2);
var key = urldecode(tmp[0]);
var value = urldecode(tmp[1]);
if (key in result)
{
result[key].push(value);
}
else
{
result[key] = [value];
}
}
return result;
}
/**
* highlight a given string on a jquery object by wrapping it in
* span elements with the given class name.
*/
jQuery.fn.highlightText = function(text, className)
{
function highlight(node)
{
if (node.nodeType == 3)
{
var val = node.nodeValue;
var pos = val.toLowerCase().indexOf(text);
if (pos >= 0 && !jQuery(node.parentNode).hasClass(className))
{
var span = document.createElement("span");
span.className = className;
span.appendChild(document.createTextNode(val.substr(pos, text.length)));
node.parentNode.insertBefore(span, node.parentNode.insertBefore(
document.createTextNode(val.substr(pos + text.length)),
node.nextSibling));
node.nodeValue = val.substr(0, pos);
}
}
else if (!jQuery(node).is("button, select, textarea"))
{
jQuery.each(node.childNodes, function() {
highlight(this);
});
}
}
return this.each(function() {
highlight(this);
});
};
/**
* highlight the search words provided in the url in the text
*/
function highlightSearchWords(selector)
{
var params = getQueryParameters();
var terms = (params.highlight) ? params.highlight[0].split(/\s+/) : [];
if (terms.length)
{
var body = $(selector);
window.setTimeout(function()
{
$.each(terms, function()
{
body.highlightText(this.toLowerCase(), 'highlighted');
});
}, 10);
}
}
jQuery(document).ready(function () {
highlightSearchWords('body');
});
})(jQuery);
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