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//= require ../lib/_lunr
//= require ../lib/_jquery
//= require ../lib/_jquery.highlight
; (function () {
'use strict';
var content, searchResults;
var highlightOpts = { element: 'span', className: 'search-highlight' };
var searchDelay = 0;
var timeoutHandle = 0;
var index;
$(populate);
$(bind);
function populate() {
index = lunr(function () {
this.ref('id');
this.field('title', { boost: 10 });
this.field('body')
this.pipeline.add(lunr.trimmer, lunr.stopWordFilter);
var that = this;
$('h1, h2').each(function () {
var title = $(this);
var body = title.nextUntil('h1, h2');
that.add({
id: title.prop('id'),
title: title.text(),
body: body.text()
});
});
determineSearchDelay(this);
})
}
function determineSearchDelay(index) {
if (index._documents.length > 5000) {
searchDelay = 300;
}
}
function bind() {
content = $('.content');
searchResults = $('.search-results');
$('#input-search').on('keyup', function (e) {
var wait = function () {
return function (executingFunction, waitTime) {
clearTimeout(timeoutHandle);
timeoutHandle = setTimeout(executingFunction, waitTime);
};
}();
wait(function () {
search(e);
}, searchDelay);
});
}
function search(event) {
var searchInput = $('#input-search')[0];
unhighlight();
searchResults.addClass('visible');
// ESC clears the field
if (event.keyCode === 27) searchInput.value = '';
if (searchInput.value) {
var results = index.search(searchInput.value).filter(function (r) {
return r.score > 0.0001;
});
if (results.length) {
searchResults.empty();
$.each(results, function (index, result) {
var elem = document.getElementById(result.ref);
searchResults.append("<li><a href='#" + result.ref + "'>" + $(elem).text() + "</a></li>");
});
highlight.call(searchInput);
} else {
searchResults.html('<li></li>');
$('.search-results li').text('No Results Found for "' + searchInput.value + '"');
}
} else {
unhighlight();
searchResults.removeClass('visible');
}
}
function highlight() {
if (this.value) content.highlight(this.value, highlightOpts);
}
function unhighlight() {
content.unhighlight(highlightOpts);
}
})();
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