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search.js
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search.js
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/*!
* # Semantic UI 2.5.0 - Search
* http://github.com/semantic-org/semantic-ui/
*
*
* Released under the MIT license
* http://opensource.org/licenses/MIT
*
*/
;(function ($, window, document, undefined) {
'use strict';
window = (typeof window != 'undefined' && window.Math == Math)
? window
: (typeof self != 'undefined' && self.Math == Math)
? self
: Function('return this')()
;
$.fn.search = function(parameters) {
var
$allModules = $(this),
moduleSelector = $allModules.selector || '',
time = new Date().getTime(),
performance = [],
query = arguments[0],
methodInvoked = (typeof query == 'string'),
queryArguments = [].slice.call(arguments, 1),
returnedValue
;
$(this)
.each(function() {
var
settings = ( $.isPlainObject(parameters) )
? $.extend(true, {}, $.fn.search.settings, parameters)
: $.extend({}, $.fn.search.settings),
className = settings.className,
metadata = settings.metadata,
regExp = settings.regExp,
fields = settings.fields,
selector = settings.selector,
error = settings.error,
namespace = settings.namespace,
eventNamespace = '.' + namespace,
moduleNamespace = namespace + '-module',
$module = $(this),
$prompt = $module.find(selector.prompt),
$searchButton = $module.find(selector.searchButton),
$results = $module.find(selector.results),
$result = $module.find(selector.result),
$category = $module.find(selector.category),
element = this,
instance = $module.data(moduleNamespace),
disabledBubbled = false,
resultsDismissed = false,
module
;
module = {
initialize: function() {
module.verbose('Initializing module');
module.get.settings();
module.determine.searchFields();
module.bind.events();
module.set.type();
module.create.results();
module.instantiate();
},
instantiate: function() {
module.verbose('Storing instance of module', module);
instance = module;
$module
.data(moduleNamespace, module)
;
},
destroy: function() {
module.verbose('Destroying instance');
$module
.off(eventNamespace)
.removeData(moduleNamespace)
;
},
refresh: function() {
module.debug('Refreshing selector cache');
$prompt = $module.find(selector.prompt);
$searchButton = $module.find(selector.searchButton);
$category = $module.find(selector.category);
$results = $module.find(selector.results);
$result = $module.find(selector.result);
},
refreshResults: function() {
$results = $module.find(selector.results);
$result = $module.find(selector.result);
},
bind: {
events: function() {
module.verbose('Binding events to search');
if(settings.automatic) {
$module
.on(module.get.inputEvent() + eventNamespace, selector.prompt, module.event.input)
;
$prompt
.attr('autocomplete', 'off')
;
}
$module
// prompt
.on('focus' + eventNamespace, selector.prompt, module.event.focus)
.on('blur' + eventNamespace, selector.prompt, module.event.blur)
.on('keydown' + eventNamespace, selector.prompt, module.handleKeyboard)
// search button
.on('click' + eventNamespace, selector.searchButton, module.query)
// results
.on('mousedown' + eventNamespace, selector.results, module.event.result.mousedown)
.on('mouseup' + eventNamespace, selector.results, module.event.result.mouseup)
.on('click' + eventNamespace, selector.result, module.event.result.click)
;
}
},
determine: {
searchFields: function() {
// this makes sure $.extend does not add specified search fields to default fields
// this is the only setting which should not extend defaults
if(parameters && parameters.searchFields !== undefined) {
settings.searchFields = parameters.searchFields;
}
}
},
event: {
input: function() {
if(settings.searchDelay) {
clearTimeout(module.timer);
module.timer = setTimeout(function() {
if(module.is.focused()) {
module.query();
}
}, settings.searchDelay);
}
else {
module.query();
}
},
focus: function() {
module.set.focus();
if(settings.searchOnFocus && module.has.minimumCharacters() ) {
module.query(function() {
if(module.can.show() ) {
module.showResults();
}
});
}
},
blur: function(event) {
var
pageLostFocus = (document.activeElement === this),
callback = function() {
module.cancel.query();
module.remove.focus();
module.timer = setTimeout(module.hideResults, settings.hideDelay);
}
;
if(pageLostFocus) {
return;
}
resultsDismissed = false;
if(module.resultsClicked) {
module.debug('Determining if user action caused search to close');
$module
.one('click.close' + eventNamespace, selector.results, function(event) {
if(module.is.inMessage(event) || disabledBubbled) {
$prompt.focus();
return;
}
disabledBubbled = false;
if( !module.is.animating() && !module.is.hidden()) {
callback();
}
})
;
}
else {
module.debug('Input blurred without user action, closing results');
callback();
}
},
result: {
mousedown: function() {
module.resultsClicked = true;
},
mouseup: function() {
module.resultsClicked = false;
},
click: function(event) {
module.debug('Search result selected');
var
$result = $(this),
$title = $result.find(selector.title).eq(0),
$link = $result.is('a[href]')
? $result
: $result.find('a[href]').eq(0),
href = $link.attr('href') || false,
target = $link.attr('target') || false,
title = $title.html(),
// title is used for result lookup
value = ($title.length > 0)
? $title.text()
: false,
results = module.get.results(),
result = $result.data(metadata.result) || module.get.result(value, results),
returnedValue
;
if( $.isFunction(settings.onSelect) ) {
if(settings.onSelect.call(element, result, results) === false) {
module.debug('Custom onSelect callback cancelled default select action');
disabledBubbled = true;
return;
}
}
module.hideResults();
if(value) {
module.set.value(value);
}
if(href) {
module.verbose('Opening search link found in result', $link);
if(target == '_blank' || event.ctrlKey) {
window.open(href);
}
else {
window.location.href = (href);
}
}
}
}
},
handleKeyboard: function(event) {
var
// force selector refresh
$result = $module.find(selector.result),
$category = $module.find(selector.category),
$activeResult = $result.filter('.' + className.active),
currentIndex = $result.index( $activeResult ),
resultSize = $result.length,
hasActiveResult = $activeResult.length > 0,
keyCode = event.which,
keys = {
backspace : 8,
enter : 13,
escape : 27,
upArrow : 38,
downArrow : 40
},
newIndex
;
// search shortcuts
if(keyCode == keys.escape) {
module.verbose('Escape key pressed, blurring search field');
module.hideResults();
resultsDismissed = true;
}
if( module.is.visible() ) {
if(keyCode == keys.enter) {
module.verbose('Enter key pressed, selecting active result');
if( $result.filter('.' + className.active).length > 0 ) {
module.event.result.click.call($result.filter('.' + className.active), event);
event.preventDefault();
return false;
}
}
else if(keyCode == keys.upArrow && hasActiveResult) {
module.verbose('Up key pressed, changing active result');
newIndex = (currentIndex - 1 < 0)
? currentIndex
: currentIndex - 1
;
$category
.removeClass(className.active)
;
$result
.removeClass(className.active)
.eq(newIndex)
.addClass(className.active)
.closest($category)
.addClass(className.active)
;
event.preventDefault();
}
else if(keyCode == keys.downArrow) {
module.verbose('Down key pressed, changing active result');
newIndex = (currentIndex + 1 >= resultSize)
? currentIndex
: currentIndex + 1
;
$category
.removeClass(className.active)
;
$result
.removeClass(className.active)
.eq(newIndex)
.addClass(className.active)
.closest($category)
.addClass(className.active)
;
event.preventDefault();
}
}
else {
// query shortcuts
if(keyCode == keys.enter) {
module.verbose('Enter key pressed, executing query');
module.query();
module.set.buttonPressed();
$prompt.one('keyup', module.remove.buttonFocus);
}
}
},
setup: {
api: function(searchTerm, callback) {
var
apiSettings = {
debug : settings.debug,
on : false,
cache : settings.cache,
action : 'search',
urlData : {
query : searchTerm
},
onSuccess : function(response) {
module.parse.response.call(element, response, searchTerm);
callback();
},
onFailure : function() {
module.displayMessage(error.serverError);
callback();
},
onAbort : function(response) {
},
onError : module.error
},
searchHTML
;
$.extend(true, apiSettings, settings.apiSettings);
module.verbose('Setting up API request', apiSettings);
$module.api(apiSettings);
}
},
can: {
useAPI: function() {
return $.fn.api !== undefined;
},
show: function() {
return module.is.focused() && !module.is.visible() && !module.is.empty();
},
transition: function() {
return settings.transition && $.fn.transition !== undefined && $module.transition('is supported');
}
},
is: {
animating: function() {
return $results.hasClass(className.animating);
},
hidden: function() {
return $results.hasClass(className.hidden);
},
inMessage: function(event) {
if(!event.target) {
return;
}
var
$target = $(event.target),
isInDOM = $.contains(document.documentElement, event.target)
;
return (isInDOM && $target.closest(selector.message).length > 0);
},
empty: function() {
return ($results.html() === '');
},
visible: function() {
return ($results.filter(':visible').length > 0);
},
focused: function() {
return ($prompt.filter(':focus').length > 0);
}
},
get: {
settings: function() {
if($.isPlainObject(parameters) && parameters.searchFullText) {
settings.fullTextSearch = parameters.searchFullText;
module.error(settings.error.oldSearchSyntax, element);
}
},
inputEvent: function() {
var
prompt = $prompt[0],
inputEvent = (prompt !== undefined && prompt.oninput !== undefined)
? 'input'
: (prompt !== undefined && prompt.onpropertychange !== undefined)
? 'propertychange'
: 'keyup'
;
return inputEvent;
},
value: function() {
return $prompt.val();
},
results: function() {
var
results = $module.data(metadata.results)
;
return results;
},
result: function(value, results) {
var
lookupFields = ['title', 'id'],
result = false
;
value = (value !== undefined)
? value
: module.get.value()
;
results = (results !== undefined)
? results
: module.get.results()
;
if(settings.type === 'category') {
module.debug('Finding result that matches', value);
$.each(results, function(index, category) {
if($.isArray(category.results)) {
result = module.search.object(value, category.results, lookupFields)[0];
// don't continue searching if a result is found
if(result) {
return false;
}
}
});
}
else {
module.debug('Finding result in results object', value);
result = module.search.object(value, results, lookupFields)[0];
}
return result || false;
},
},
select: {
firstResult: function() {
module.verbose('Selecting first result');
$result.first().addClass(className.active);
}
},
set: {
focus: function() {
$module.addClass(className.focus);
},
loading: function() {
$module.addClass(className.loading);
},
value: function(value) {
module.verbose('Setting search input value', value);
$prompt
.val(value)
;
},
type: function(type) {
type = type || settings.type;
if(settings.type == 'category') {
$module.addClass(settings.type);
}
},
buttonPressed: function() {
$searchButton.addClass(className.pressed);
}
},
remove: {
loading: function() {
$module.removeClass(className.loading);
},
focus: function() {
$module.removeClass(className.focus);
},
buttonPressed: function() {
$searchButton.removeClass(className.pressed);
}
},
query: function(callback) {
callback = $.isFunction(callback)
? callback
: function(){}
;
var
searchTerm = module.get.value(),
cache = module.read.cache(searchTerm)
;
callback = callback || function() {};
if( module.has.minimumCharacters() ) {
if(cache) {
module.debug('Reading result from cache', searchTerm);
module.save.results(cache.results);
module.addResults(cache.html);
module.inject.id(cache.results);
callback();
}
else {
module.debug('Querying for', searchTerm);
if($.isPlainObject(settings.source) || $.isArray(settings.source)) {
module.search.local(searchTerm);
callback();
}
else if( module.can.useAPI() ) {
module.search.remote(searchTerm, callback);
}
else {
module.error(error.source);
callback();
}
}
settings.onSearchQuery.call(element, searchTerm);
}
else {
module.hideResults();
}
},
search: {
local: function(searchTerm) {
var
results = module.search.object(searchTerm, settings.content),
searchHTML
;
module.set.loading();
module.save.results(results);
module.debug('Returned full local search results', results);
if(settings.maxResults > 0) {
module.debug('Using specified max results', results);
results = results.slice(0, settings.maxResults);
}
if(settings.type == 'category') {
results = module.create.categoryResults(results);
}
searchHTML = module.generateResults({
results: results
});
module.remove.loading();
module.addResults(searchHTML);
module.inject.id(results);
module.write.cache(searchTerm, {
html : searchHTML,
results : results
});
},
remote: function(searchTerm, callback) {
callback = $.isFunction(callback)
? callback
: function(){}
;
if($module.api('is loading')) {
$module.api('abort');
}
module.setup.api(searchTerm, callback);
$module
.api('query')
;
},
object: function(searchTerm, source, searchFields) {
var
results = [],
exactResults = [],
fuzzyResults = [],
searchExp = searchTerm.toString().replace(regExp.escape, '\\$&'),
matchRegExp = new RegExp(regExp.beginsWith + searchExp, 'i'),
// avoid duplicates when pushing results
addResult = function(array, result) {
var
notResult = ($.inArray(result, results) == -1),
notFuzzyResult = ($.inArray(result, fuzzyResults) == -1),
notExactResults = ($.inArray(result, exactResults) == -1)
;
if(notResult && notFuzzyResult && notExactResults) {
array.push(result);
}
}
;
source = source || settings.source;
searchFields = (searchFields !== undefined)
? searchFields
: settings.searchFields
;
// search fields should be array to loop correctly
if(!$.isArray(searchFields)) {
searchFields = [searchFields];
}
// exit conditions if no source
if(source === undefined || source === false) {
module.error(error.source);
return [];
}
// iterate through search fields looking for matches
$.each(searchFields, function(index, field) {
$.each(source, function(label, content) {
var
fieldExists = (typeof content[field] == 'string')
;
if(fieldExists) {
if( content[field].search(matchRegExp) !== -1) {
// content starts with value (first in results)
addResult(results, content);
}
else if(settings.fullTextSearch === 'exact' && module.exactSearch(searchTerm, content[field]) ) {
// content fuzzy matches (last in results)
addResult(exactResults, content);
}
else if(settings.fullTextSearch == true && module.fuzzySearch(searchTerm, content[field]) ) {
// content fuzzy matches (last in results)
addResult(fuzzyResults, content);
}
}
});
});
$.merge(exactResults, fuzzyResults)
$.merge(results, exactResults);
return results;
}
},
exactSearch: function (query, term) {
query = query.toLowerCase();
term = term.toLowerCase();
if(term.indexOf(query) > -1) {
return true;
}
return false;
},
fuzzySearch: function(query, term) {
var
termLength = term.length,
queryLength = query.length
;
if(typeof query !== 'string') {
return false;
}
query = query.toLowerCase();
term = term.toLowerCase();
if(queryLength > termLength) {
return false;
}
if(queryLength === termLength) {
return (query === term);
}
search: for (var characterIndex = 0, nextCharacterIndex = 0; characterIndex < queryLength; characterIndex++) {
var
queryCharacter = query.charCodeAt(characterIndex)
;
while(nextCharacterIndex < termLength) {
if(term.charCodeAt(nextCharacterIndex++) === queryCharacter) {
continue search;
}
}
return false;
}
return true;
},
parse: {
response: function(response, searchTerm) {
var
searchHTML = module.generateResults(response)
;
module.verbose('Parsing server response', response);
if(response !== undefined) {
if(searchTerm !== undefined && response[fields.results] !== undefined) {
module.addResults(searchHTML);
module.inject.id(response[fields.results]);
module.write.cache(searchTerm, {
html : searchHTML,
results : response[fields.results]
});
module.save.results(response[fields.results]);
}
}
}
},
cancel: {
query: function() {
if( module.can.useAPI() ) {
$module.api('abort');
}
}
},
has: {
minimumCharacters: function() {
var
searchTerm = module.get.value(),
numCharacters = searchTerm.length
;
return (numCharacters >= settings.minCharacters);
},
results: function() {
if($results.length === 0) {
return false;
}
var
html = $results.html()
;
return html != '';
}
},
clear: {
cache: function(value) {
var
cache = $module.data(metadata.cache)
;
if(!value) {
module.debug('Clearing cache', value);
$module.removeData(metadata.cache);
}
else if(value && cache && cache[value]) {
module.debug('Removing value from cache', value);
delete cache[value];
$module.data(metadata.cache, cache);
}
}
},
read: {
cache: function(name) {
var
cache = $module.data(metadata.cache)
;
if(settings.cache) {
module.verbose('Checking cache for generated html for query', name);
return (typeof cache == 'object') && (cache[name] !== undefined)
? cache[name]
: false
;
}
return false;
}
},
create: {
categoryResults: function(results) {
var
categoryResults = {}
;
$.each(results, function(index, result) {
if(!result.category) {
return;
}
if(categoryResults[result.category] === undefined) {
module.verbose('Creating new category of results', result.category);
categoryResults[result.category] = {
name : result.category,
results : [result]
}
}
else {
categoryResults[result.category].results.push(result);
}
});
return categoryResults;
},
id: function(resultIndex, categoryIndex) {
var
resultID = (resultIndex + 1), // not zero indexed
categoryID = (categoryIndex + 1),
firstCharCode,
letterID,
id
;
if(categoryIndex !== undefined) {
// start char code for "A"
letterID = String.fromCharCode(97 + categoryIndex);
id = letterID + resultID;
module.verbose('Creating category result id', id);
}
else {
id = resultID;
module.verbose('Creating result id', id);
}
return id;
},
results: function() {
if($results.length === 0) {
$results = $('<div />')
.addClass(className.results)
.appendTo($module)
;
}
}
},
inject: {
result: function(result, resultIndex, categoryIndex) {
module.verbose('Injecting result into results');
var
$selectedResult = (categoryIndex !== undefined)
? $results
.children().eq(categoryIndex)
.children(selector.results)
.first()
.children(selector.result)
.eq(resultIndex)
: $results
.children(selector.result).eq(resultIndex)
;
module.verbose('Injecting results metadata', $selectedResult);
$selectedResult
.data(metadata.result, result)
;
},
id: function(results) {
module.debug('Injecting unique ids into results');
var
// since results may be object, we must use counters
categoryIndex = 0,
resultIndex = 0
;
if(settings.type === 'category') {
// iterate through each category result
$.each(results, function(index, category) {
resultIndex = 0;
$.each(category.results, function(index, value) {
var
result = category.results[index]
;
if(result.id === undefined) {
result.id = module.create.id(resultIndex, categoryIndex);
}
module.inject.result(result, resultIndex, categoryIndex);
resultIndex++;
});
categoryIndex++;
});
}
else {
// top level
$.each(results, function(index, value) {
var
result = results[index]
;
if(result.id === undefined) {
result.id = module.create.id(resultIndex);
}
module.inject.result(result, resultIndex);
resultIndex++;
});
}
return results;
}
},
save: {
results: function(results) {
module.verbose('Saving current search results to metadata', results);
$module.data(metadata.results, results);
}
},
write: {
cache: function(name, value) {
var
cache = ($module.data(metadata.cache) !== undefined)
? $module.data(metadata.cache)
: {}
;
if(settings.cache) {
module.verbose('Writing generated html to cache', name, value);
cache[name] = value;
$module
.data(metadata.cache, cache)
;
}
}
},
addResults: function(html) {
if( $.isFunction(settings.onResultsAdd) ) {
if( settings.onResultsAdd.call($results, html) === false ) {
module.debug('onResultsAdd callback cancelled default action');
return false;
}
}
if(html) {
$results
.html(html)
;
module.refreshResults();
if(settings.selectFirstResult) {
module.select.firstResult();
}
module.showResults();
}
else {
module.hideResults(function() {
$results.empty();
});
}
},
showResults: function(callback) {
callback = $.isFunction(callback)
? callback
: function(){}
;
if(resultsDismissed) {
return;
}
if(!module.is.visible() && module.has.results()) {
if( module.can.transition() ) {
module.debug('Showing results with css animations');
$results
.transition({
animation : settings.transition + ' in',
debug : settings.debug,
verbose : settings.verbose,
duration : settings.duration,
onComplete : function() {
callback();
},
queue : true
})
;
}
else {
module.debug('Showing results with javascript');
$results
.stop()
.fadeIn(settings.duration, settings.easing)
;
}
settings.onResultsOpen.call($results);
}
},
hideResults: function(callback) {
callback = $.isFunction(callback)
? callback
: function(){}
;
if( module.is.visible() ) {
if( module.can.transition() ) {
module.debug('Hiding results with css animations');
$results
.transition({
animation : settings.transition + ' out',
debug : settings.debug,
verbose : settings.verbose,
duration : settings.duration,
onComplete : function() {
callback();
},
queue : true
})
;
}
else {
module.debug('Hiding results with javascript');
$results
.stop()
.fadeOut(settings.duration, settings.easing)
;
}
settings.onResultsClose.call($results);
}
},
generateResults: function(response) {
module.debug('Generating html from response', response);
var
template = settings.templates[settings.type],
isProperObject = ($.isPlainObject(response[fields.results]) && !$.isEmptyObject(response[fields.results])),
isProperArray = ($.isArray(response[fields.results]) && response[fields.results].length > 0),
html = ''