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search.js
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search.js
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/*!
* # Fomantic-UI - Search
* https://github.com/fomantic/Fomantic-UI/
*
*
* Released under the MIT license
* https://opensource.org/licenses/MIT
*
*/
(function ($, window, document) {
'use strict';
function isFunction(obj) {
return typeof obj === 'function' && typeof obj.nodeType !== 'number';
}
window = window !== undefined && window.Math === Math
? window
: globalThis;
$.fn.search = function (parameters) {
var
$allModules = $(this),
time = Date.now(),
performance = [],
query = arguments[0],
methodInvoked = typeof query === 'string',
queryArguments = [].slice.call(arguments, 1),
returnedValue
;
$allModules.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', module.is.chrome() ? 'fomantic-search' : '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(function () {
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.trigger('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 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)
;
var oldValue = module.get.value();
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.get.value() === oldValue) {
module.set.value(value);
}
if (href) {
event.preventDefault();
module.verbose('Opening search link found in result', $link);
if (target === '_blank' || event.ctrlKey) {
window.open(href);
} else {
window.location.href = href;
}
}
},
},
},
ensureVisible: function ($el) {
var
elTop,
elBottom,
resultsScrollTop,
resultsHeight
;
if ($el.length === 0) {
return;
}
elTop = $el.position().top;
elBottom = elTop + $el.outerHeight(true);
resultsScrollTop = $results.scrollTop();
resultsHeight = $results.height();
if (elTop < 0) {
$results.scrollTop(resultsScrollTop + elTop);
} else if (resultsHeight < elBottom) {
$results.scrollTop(resultsScrollTop + (elBottom - resultsHeight));
}
},
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) {
if (!module.is.visible()) {
module.verbose('Escape key pressed, blurring search field');
$prompt.trigger('blur');
} else {
module.hideResults();
}
event.stopPropagation();
resultsDismissed = true;
}
if (module.is.visible()) {
if (keyCode === keys.enter) {
module.verbose('Enter key pressed, selecting active result');
if ($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)
;
module.ensureVisible($result.eq(newIndex));
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)
;
module.ensureVisible($result.eq(newIndex));
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,
},
},
apiCallbacks = {
onSuccess: function (response, $module, xhr) {
module.parse.response.call(element, response, searchTerm);
callback();
if (settings.apiSettings && typeof settings.apiSettings.onSuccess === 'function') {
settings.apiSettings.onSuccess.call(this, response, $module, xhr);
}
},
onFailure: function (response, $module, xhr) {
module.displayMessage(error.serverError);
callback();
if (settings.apiSettings && typeof settings.apiSettings.onFailure === 'function') {
settings.apiSettings.onFailure.call(this, response, $module, xhr);
}
},
onAbort: function (status, $module, xhr) {
if (settings.apiSettings && typeof settings.apiSettings.onAbort === 'function') {
settings.apiSettings.onAbort.call(this, status, $module, xhr);
}
},
onError: function (errorMessage, $module, xhr) {
module.error();
if (settings.apiSettings && typeof settings.apiSettings.onError === 'function') {
settings.apiSettings.onError.call(this, errorMessage, $module, xhr);
}
},
}
;
$.extend(true, apiSettings, settings.apiSettings, apiCallbacks);
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;
},
},
is: {
animating: function () {
return $results.hasClass(className.animating);
},
chrome: function () {
return !!window.chrome && !window.StyleMedia;
},
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);
}
if (settings.ignoreDiacritics && !String.prototype.normalize) {
settings.ignoreDiacritics = false;
module.error(error.noNormalize, 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 () {
return $module.data(metadata.results);
},
result: function (value, results) {
var
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 (Array.isArray(category.results)) {
result = module.search.object(value, category.results)[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)[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 (className[type]) {
$module.addClass(className[type]);
}
},
buttonPressed: function () {
$searchButton.addClass(className.pressed);
},
},
remove: {
loading: function () {
$module.removeClass(className.loading);
},
focus: function () {
$module.removeClass(className.focus);
},
buttonPressed: function () {
$searchButton.removeClass(className.pressed);
},
diacritics: function (text) {
return settings.ignoreDiacritics ? text.normalize('NFD').replace(/[\u0300-\u036F]/g, '') : text;
},
},
query: function (callback) {
callback = isFunction(callback)
? callback
: function () {};
var
searchTerm = module.get.value(),
cache = module.read.cache(searchTerm)
;
callback = callback || function () {};
if (module.has.minimumCharacters()) {
if (cache) {
module.debug('Reading result from cache', searchTerm);
module.save.results(cache.results);
settings.onResults.call(element, cache.results, true);
module.addResults(cache.html);
module.inject.id(cache.results);
callback();
} else {
module.debug('Querying for', searchTerm);
if ($.isPlainObject(settings.source) || Array.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.source),
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);
$module
.api('query')
;
},
object: function (searchTerm, source, searchFields) {
searchTerm = module.remove.diacritics(String(searchTerm));
var
results = [],
exactResults = [],
fuzzyResults = [],
searchExp = searchTerm.replace(regExp.escape, '\\$&'),
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 (!Array.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
var lastSearchFieldIndex = searchFields.length - 1;
$.each(source, function (label, content) {
var concatenatedContent = [];
$.each(searchFields, function (index, field) {
var
fieldExists = (typeof content[field] === 'string') || (typeof content[field] === 'number')
;
if (fieldExists) {
var text;
text = typeof content[field] === 'string'
? module.remove.diacritics(content[field])
: content[field].toString();
if (settings.fullTextSearch === 'all') {
concatenatedContent.push(text);
if (index < lastSearchFieldIndex) {
return true;
}
text = concatenatedContent.join(' ');
}
if (settings.fullTextSearch !== 'all' && text.search(matchRegExp) !== -1) {
// content starts with value (first in results)
addResult(results, content);
} else if (settings.fullTextSearch === 'exact' && module.exactSearch(searchTerm, text)) {
addResult(exactResults, content);
} else if (settings.fullTextSearch === 'some' && module.wordSearch(searchTerm, text)) {
addResult(exactResults, content);
} else if (settings.fullTextSearch === 'all' && module.wordSearch(searchTerm, text, true)) {
addResult(exactResults, content);
} else if (settings.fullTextSearch === true && module.fuzzySearch(searchTerm, text)) {
// 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();
return term.indexOf(query) > -1;
},
wordSearch: function (query, term, matchAll) {
var allWords = query.split(/\s+/),
w,
wL = allWords.length,
found = false
;
for (w = 0; w < wL; w++) {
found = module.exactSearch(allWords[w], term);
if ((!found && matchAll) || (found && !matchAll)) {
break;
}
}
return found;
},
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;
}
for (var characterIndex = 0, nextCharacterIndex = 0; characterIndex < queryLength; characterIndex++) {
var
continueSearch = false,
queryCharacter = query.charCodeAt(characterIndex)
;
while (nextCharacterIndex < termLength) {
if (term.charCodeAt(nextCharacterIndex++) === queryCharacter) {
continueSearch = true;
break;
}
}
if (!continueSearch) {
return false;
}
}
return true;
},
parse: {
response: function (response, searchTerm) {
if (Array.isArray(response)) {
var o = {};
o[fields.results] = response;
response = o;
}
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 = {}
;
$.each(results, function (index, result) {
if (!result.category) {
return;
}
if (categoryResults[result.category] === undefined) {
module.verbose('Creating new category of results', result.category);
categoryResults[result.category] = {
name: result.category,
results: [result],
};
} else {
categoryResults[result.category].results.push(result);
}
});
return categoryResults;
},
id: function (resultIndex, categoryIndex) {
var
resultID = resultIndex + 1, // not zero indexed
letterID,
id
;
if (categoryIndex !== undefined) {
// start char code for "A"
letterID = String.fromCharCode(97 + categoryIndex);
id = letterID + resultID;
module.verbose('Creating category result id', id);
} else {
id = resultID;
module.verbose('Creating result id', id);
}
return id;
},
results: function () {
if ($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) {
if (category.results.length > 0) {
resultIndex = 0;
$.each(category.results, function (index, result) {
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, result) {
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();