gecko/testing/mozmill/simplejson-2.1.1/docs/_static/searchtools.js

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/**
* helper function to return a node containing the
* search summary for a given text. keywords is a list
* of stemmed words, hlwords is the list of normal, unstemmed
* words. the first one is used to find the occurance, the
* latter for highlighting it.
*/
jQuery.makeSearchSummary = function(text, keywords, hlwords) {
var textLower = text.toLowerCase();
var start = 0;
$.each(keywords, function() {
var i = textLower.indexOf(this.toLowerCase());
if (i > -1) {
start = i;
}
});
start = Math.max(start - 120, 0);
var excerpt = ((start > 0) ? '...' : '') +
$.trim(text.substr(start, 240)) +
((start + 240 - text.length) ? '...' : '');
var rv = $('<div class="context"></div>').text(excerpt);
$.each(hlwords, function() {
rv = rv.highlightText(this, 'highlight');
});
return rv;
}
/**
* Porter Stemmer
*/
var PorterStemmer = function() {
var step2list = {
ational: 'ate',
tional: 'tion',
enci: 'ence',
anci: 'ance',
izer: 'ize',
bli: 'ble',
alli: 'al',
entli: 'ent',
eli: 'e',
ousli: 'ous',
ization: 'ize',
ation: 'ate',
ator: 'ate',
alism: 'al',
iveness: 'ive',
fulness: 'ful',
ousness: 'ous',
aliti: 'al',
iviti: 'ive',
biliti: 'ble',
logi: 'log'
};
var step3list = {
icate: 'ic',
ative: '',
alize: 'al',
iciti: 'ic',
ical: 'ic',
ful: '',
ness: ''
};
var c = "[^aeiou]"; // consonant
var v = "[aeiouy]"; // vowel
var C = c + "[^aeiouy]*"; // consonant sequence
var V = v + "[aeiou]*"; // vowel sequence
var mgr0 = "^(" + C + ")?" + V + C; // [C]VC... is m>0
var meq1 = "^(" + C + ")?" + V + C + "(" + V + ")?$"; // [C]VC[V] is m=1
var mgr1 = "^(" + C + ")?" + V + C + V + C; // [C]VCVC... is m>1
var s_v = "^(" + C + ")?" + v; // vowel in stem
this.stemWord = function (w) {
var stem;
var suffix;
var firstch;
var origword = w;
if (w.length < 3) {
return w;
}
var re;
var re2;
var re3;
var re4;
firstch = w.substr(0,1);
if (firstch == "y") {
w = firstch.toUpperCase() + w.substr(1);
}
// Step 1a
re = /^(.+?)(ss|i)es$/;
re2 = /^(.+?)([^s])s$/;
if (re.test(w)) {
w = w.replace(re,"$1$2");
}
else if (re2.test(w)) {
w = w.replace(re2,"$1$2");
}
// Step 1b
re = /^(.+?)eed$/;
re2 = /^(.+?)(ed|ing)$/;
if (re.test(w)) {
var fp = re.exec(w);
re = new RegExp(mgr0);
if (re.test(fp[1])) {
re = /.$/;
w = w.replace(re,"");
}
}
else if (re2.test(w)) {
var fp = re2.exec(w);
stem = fp[1];
re2 = new RegExp(s_v);
if (re2.test(stem)) {
w = stem;
re2 = /(at|bl|iz)$/;
re3 = new RegExp("([^aeiouylsz])\\1$");
re4 = new RegExp("^" + C + v + "[^aeiouwxy]$");
if (re2.test(w)) {
w = w + "e";
}
else if (re3.test(w)) {
re = /.$/; w = w.replace(re,"");
}
else if (re4.test(w)) {
w = w + "e";
}
}
}
// Step 1c
re = /^(.+?)y$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
re = new RegExp(s_v);
if (re.test(stem)) { w = stem + "i"; }
}
// Step 2
re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
suffix = fp[2];
re = new RegExp(mgr0);
if (re.test(stem)) {
w = stem + step2list[suffix];
}
}
// Step 3
re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
suffix = fp[2];
re = new RegExp(mgr0);
if (re.test(stem)) {
w = stem + step3list[suffix];
}
}
// Step 4
re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/;
re2 = /^(.+?)(s|t)(ion)$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
re = new RegExp(mgr1);
if (re.test(stem)) {
w = stem;
}
}
else if (re2.test(w)) {
var fp = re2.exec(w);
stem = fp[1] + fp[2];
re2 = new RegExp(mgr1);
if (re2.test(stem)) {
w = stem;
}
}
// Step 5
re = /^(.+?)e$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
re = new RegExp(mgr1);
re2 = new RegExp(meq1);
re3 = new RegExp("^" + C + v + "[^aeiouwxy]$");
if (re.test(stem) || (re2.test(stem) && !(re3.test(stem)))) {
w = stem;
}
}
re = /ll$/;
re2 = new RegExp(mgr1);
if (re.test(w) && re2.test(w)) {
re = /.$/;
w = w.replace(re,"");
}
// and turn initial Y back to y
if (firstch == "y") {
w = firstch.toLowerCase() + w.substr(1);
}
return w;
}
}
/**
* Search Module
*/
var Search = {
init : function() {
var params = $.getQueryParameters();
if (params.q) {
var query = params.q[0];
$('input[@name="q"]')[0].value = query;
this.performSearch(query);
}
},
/**
* perform a search for something
*/
performSearch : function(query) {
// create the required interface elements
var out = $('#search-results');
var title = $('<h2>Searching</h2>').appendTo(out);
var dots = $('<span></span>').appendTo(title);
var status = $('<p style="display: none"></p>').appendTo(out);
var output = $('<ul class="search"/>').appendTo(out);
// spawn a background runner for updating the dots
// until the search has finished
var pulseStatus = 0;
function pulse() {
pulseStatus = (pulseStatus + 1) % 4;
var dotString = '';
for (var i = 0; i < pulseStatus; i++) {
dotString += '.';
}
dots.text(dotString);
if (pulseStatus > -1) {
window.setTimeout(pulse, 500);
}
};
pulse();
// stem the searchwords and add them to the
// correct list
var stemmer = new PorterStemmer();
var searchwords = [];
var excluded = [];
var hlwords = [];
var tmp = query.split(/\s+/);
for (var i = 0; i < tmp.length; i++) {
// stem the word
var word = stemmer.stemWord(tmp[i]).toLowerCase();
// select the correct list
if (word[0] == '-') {
var toAppend = excluded;
word = word.substr(1);
}
else {
var toAppend = searchwords;
hlwords.push(tmp[i].toLowerCase());
}
// only add if not already in the list
if (!$.contains(toAppend, word)) {
toAppend.push(word);
}
};
var highlightstring = '?highlight=' + $.urlencode(hlwords.join(" "));
console.debug('SEARCH: searching for:');
console.info('required: ', searchwords);
console.info('excluded: ', excluded);
// fetch searchindex and perform search
$.getJSON('searchindex.json', function(data) {
// prepare search
var filenames = data[0];
var titles = data[1]
var words = data[2];
var fileMap = {};
var files = null;
// perform the search on the required words
for (var i = 0; i < searchwords.length; i++) {
var word = searchwords[i];
// no match but word was a required one
if ((files = words[word]) == null) {
break;
}
// create the mapping
for (var j = 0; j < files.length; j++) {
var file = files[j];
if (file in fileMap) {
fileMap[file].push(word);
}
else {
fileMap[file] = [word];
}
}
}
// now check if the files are in the correct
// areas and if the don't contain excluded words
var results = [];
for (var file in fileMap) {
var valid = true;
// check if all requirements are matched
if (fileMap[file].length != searchwords.length) {
continue;
}
// ensure that none of the excluded words is in the
// search result.
for (var i = 0; i < excluded.length; i++) {
if ($.contains(words[excluded[i]] || [], file)) {
valid = false;
break;
}
}
// if we have still a valid result we can add it
// to the result list
if (valid) {
results.push([filenames[file], titles[file]]);
}
}
// delete unused variables in order to not waste
// memory until list is retrieved completely
delete filenames, titles, words, data;
// now sort the results by title
results.sort(function(a, b) {
var left = a[1].toLowerCase();
var right = b[1].toLowerCase();
return (left > right) ? -1 : ((left < right) ? 1 : 0);
});
// print the results
var resultCount = results.length;
function displayNextItem() {
// results left, load the summary and display it
if (results.length) {
var item = results.pop();
var listItem = $('<li style="display:none"></li>');
listItem.append($('<a/>').attr(
'href',
item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX +
highlightstring).html(item[1]));
$.get('_sources/' + item[0] + '.txt', function(data) {
listItem.append($.makeSearchSummary(data, searchwords, hlwords));
output.append(listItem);
listItem.slideDown(10, function() {
displayNextItem();
});
});
}
// search finished, update title and status message
else {
pulseStatus = -1;
title.text('Search Results');
if (!resultCount) {
status.text('Your search did not match any documents. ' +
'Please make sure that all words are spelled ' +
'correctly and that you\'ve selected enough ' +
'categories.');
}
else {
status.text('Search finished, found ' + resultCount +
' page' + (resultCount != 1 ? 's' : '') +
' matching the search query.');
}
status.fadeIn(500);
}
}
displayNextItem();
});
}
}
$(document).ready(function() {
Search.init();
});