11b9f07d08
This is update from jquery.uls to
cc02dabe6e
This brings desktop ULS in line with language search on MobileFrontend.
See https://github.com/wikimedia/jquery.uls/pull/239
Bug: T138235
Change-Id: Iee06898acf9745a3450b1a87d5b67637d34ce1ed
444 lines
11 KiB
JavaScript
444 lines
11 KiB
JavaScript
/**
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* Universal Language Selector
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* ULS core component.
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*
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* Copyright (C) 2012 Alolita Sharma, Amir Aharoni, Arun Ganesh, Brandon Harris,
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* Niklas Laxström, Pau Giner, Santhosh Thottingal, Siebrand Mazeland and other
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* contributors. See CREDITS for a list.
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*
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* UniversalLanguageSelector is dual licensed GPLv2 or later and MIT. You don't
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* have to do anything special to choose one license or the other and you don't
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* have to notify anyone which license you are using. You are free to use
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* UniversalLanguageSelector in commercial projects as long as the copyright
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* header is left intact. See files GPL-LICENSE and MIT-LICENSE for details.
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*
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* @file
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* @ingroup Extensions
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* @licence GNU General Public Licence 2.0 or later
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* @licence MIT License
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*/
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( function ( $ ) {
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'use strict';
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var template, ULS;
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// Region numbers in id attributes also appear in the langdb.
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/*jshint multistr:true */
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template = '<div class="grid uls-menu"> \
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<div id="search" class="row uls-search"> \
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<div class="uls-search-wrapper"> \
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<label class="uls-search-label" for="uls-languagefilter"></label>\
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<div class="uls-search-input-wrapper">\
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<span id="uls-languagefilter-clear" class="uls-languagefilter-clear"></span>\
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<input type="text" class="uls-filterinput uls-filtersuggestion"\
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id="uls-filtersuggestion" disabled="true" autocomplete="off">\
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<input type="text" class="uls-filterinput uls-languagefilter"\
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id="uls-languagefilter" data-clear="uls-languagefilter-clear"\
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data-suggestion="uls-filtersuggestion"\
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placeholder="Search for a language" autocomplete="off">\
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</div>\
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</div>\
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</div>\
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<div class="row uls-language-list"></div>\
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<div class="row" id="uls-settings-block"></div>\
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</div>';
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/*jshint multistr:false */
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/**
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* Count the number of keys in an object.
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* Works in a cross-browser way.
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* @param {Object} The object.
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*/
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function objectLength ( obj ) {
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var count, key;
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// Some old browsers don't support Object.keys
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if ( Object.keys ) {
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return Object.keys( obj ).length;
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}
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count = 0;
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for ( key in obj ) {
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if ( Object.prototype.hasOwnProperty.call( obj, key ) ) {
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count++;
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}
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}
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return count;
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}
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/**
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* ULS Public class definition
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*/
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ULS = function ( element, options ) {
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this.$element = $( element );
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this.options = $.extend( {}, $.fn.uls.defaults, options );
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this.$menu = $( template );
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this.languages = this.options.languages;
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for ( var code in this.languages ) {
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if ( $.uls.data.languages[ code ] === undefined ) {
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// Language is unknown to ULS.
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delete this.languages[ code ];
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}
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}
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this.left = this.options.left;
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this.top = this.options.top;
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this.shown = false;
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this.initialized = false;
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this.$languageFilter = this.$menu.find( '#uls-languagefilter' );
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this.$resultsView = this.$menu.find( '.uls-language-list' );
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this.render();
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this.listen();
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this.ready();
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};
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ULS.prototype = {
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constructor: ULS,
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/**
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* A "hook" that runs after the ULS constructor.
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* At this point it is not guaranteed that the ULS has its dimensions
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* and that the languages lists are initialized.
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*
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* To use it, pass a function as the onReady parameter
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* in the options when initializing ULS.
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*/
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ready: function () {
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if ( this.options.onReady ) {
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this.options.onReady.call( this );
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}
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},
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/**
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* A "hook" that runs after the ULS panel becomes visible
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* by using the show method.
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*
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* To use it, pass a function as the onVisible parameter
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* in the options when initializing ULS.
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*/
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visible: function () {
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if ( this.options.onVisible ) {
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this.options.onVisible.call( this );
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}
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},
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/**
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* Calculate the position of ULS
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* Returns an object with top and left properties.
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* @returns {Object}
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*/
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position: function () {
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var pos,
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top = this.top,
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left = this.left;
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if ( top === undefined ) {
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pos = $.extend( {}, this.$element.offset(), {
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height: this.$element[ 0 ].offsetHeight
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} );
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top = pos.top + pos.height;
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}
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if ( left === undefined ) {
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left = $( window ).width() / 2 - this.$menu.outerWidth() / 2;
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}
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return {
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top: top,
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left: left
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};
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},
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/**
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* Show the ULS window
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*/
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show: function () {
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var widthClasses = {
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wide: 'uls-wide',
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medium: 'uls-medium',
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narrow: 'uls-narrow'
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};
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this.$menu.addClass( widthClasses[this.getMenuWidth()] );
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if ( !this.initialized ) {
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$( 'body' ).prepend( this.$menu );
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this.i18n();
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this.initialized = true;
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}
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this.$menu.css( this.position() );
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this.$menu.show();
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this.$menu.scrollIntoView();
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this.shown = true;
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if ( !this.isMobile() ) {
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this.$languageFilter.focus();
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}
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this.visible();
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},
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i18n: function () {
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if ( $.i18n ) {
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this.$menu.find( '[data-i18n]' ).i18n();
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this.$languageFilter.prop( 'placeholder', $.i18n( 'uls-search-placeholder' ) );
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}
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},
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/**
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* Hide the ULS window
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*/
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hide: function () {
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this.$menu.hide();
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this.shown = false;
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if ( this.options.onCancel ) {
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this.options.onCancel.call( this );
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}
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},
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/**
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* Render the UI elements.
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* Does nothing by default. Can be used for customization.
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*/
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render: function () {
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// Rendering stuff here
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},
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/**
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* Callback for no results found context.
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*/
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noresults: function () {
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this.$resultsView.lcd( 'noResults' );
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},
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/**
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* callback for results found context.
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*/
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success: function () {
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this.$resultsView.show();
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},
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/**
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* Bind the UI elements with their event listeners
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*/
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listen: function () {
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var lcd, columnsOptions, languagesCount;
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columnsOptions = {
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wide: 4,
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medium: 2,
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narrow: 1
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};
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// Register all event listeners to the ULS here.
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this.$element.on( 'click', $.proxy( this.click, this ) );
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// Don't do anything if pressing on empty space in the ULS
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this.$menu.on( 'click', function ( e ) {
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e.stopPropagation();
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} );
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// Handle key press events on the menu
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this.$menu.on( 'keypress', $.proxy( this.keypress, this ) )
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.on( 'keyup', $.proxy( this.keyup, this ) );
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if ( this.eventSupported( 'keydown' ) ) {
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this.$menu.on( 'keydown', $.proxy( this.keypress, this ) );
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}
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languagesCount = objectLength( this.options.languages );
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lcd = this.$resultsView.lcd( {
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languages: this.languages,
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columns: columnsOptions[ this.getMenuWidth() ],
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quickList: languagesCount > 12 ? this.options.quickList : [],
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clickhandler: $.proxy( this.select, this ),
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source: this.$languageFilter,
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showRegions: this.options.showRegions,
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languageDecorator: this.options.languageDecorator
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} ).data( 'lcd' );
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this.$languageFilter.languagefilter( {
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$target: lcd,
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languages: this.languages,
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searchAPI: this.options.searchAPI,
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onSelect: $.proxy( this.select, this )
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} );
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this.$languageFilter.on( 'noresults.uls', $.proxy( this.noresults, this ) );
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this.$languageFilter.on( 'resultsfound.uls', $.proxy( this.success, this ) );
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$( 'html' ).click( $.proxy( this.cancel, this ) );
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},
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/**
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* On select handler for search results
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* @param langCode
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*/
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select: function ( langCode ) {
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this.hide();
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if ( this.options.onSelect ) {
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this.options.onSelect.call( this, langCode );
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}
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},
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/**
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* On cancel handler for the uls menu
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*/
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cancel: function ( e ) {
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if ( e && ( this.$element.is( e.target ) || $.contains( this.$element[0], e.target ) ) ) {
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return;
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}
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this.hide();
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},
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keyup: function ( e ) {
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if ( !this.shown ) {
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return;
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}
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if ( e.keyCode === 27 ) { // escape
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this.cancel();
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e.preventDefault();
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e.stopPropagation();
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}
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},
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keypress: function ( e ) {
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if ( !this.shown ) {
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return;
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}
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if ( e.keyCode === 27 ) { // escape
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this.cancel();
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e.preventDefault();
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e.stopPropagation();
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}
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},
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click: function () {
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if ( this.shown ) {
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this.hide();
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} else {
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this.show();
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}
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},
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eventSupported: function ( eventName ) {
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var isSupported = eventName in this.$menu;
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if ( !isSupported ) {
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this.$element.setAttribute( eventName, 'return;' );
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isSupported = typeof this.$element[ eventName ] === 'function';
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}
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return isSupported;
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},
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/**
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* Get the panel menu width parameter
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* @return string
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*/
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getMenuWidth: function () {
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var languagesCount;
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if ( this.options.menuWidth ) {
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return this.options.menuWidth;
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}
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languagesCount = objectLength( this.options.languages );
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if ( languagesCount < 25 ) {
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return 'narrow';
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}
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if ( languagesCount < 100 ) {
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return 'medium';
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}
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return 'wide';
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},
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isMobile: function () {
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return navigator.userAgent.match( /(iPhone|iPod|iPad|Android|BlackBerry)/ );
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}
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};
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/* ULS PLUGIN DEFINITION
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* =========================== */
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$.fn.uls = function ( option ) {
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return this.each( function () {
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var $this = $( this ),
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data = $this.data( 'uls' ),
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options = typeof option === 'object' && option;
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if ( !data ) {
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$this.data( 'uls', ( data = new ULS( this, options ) ) );
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}
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if ( typeof option === 'string' ) {
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data[ option ]();
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}
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} );
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};
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$.fn.uls.defaults = {
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onSelect: null, // Callback function to be called when a language is selected
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searchAPI: null, // Language search API
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languages: $.uls.data.getAutonyms(), // Languages to be used for ULS, default is all languages
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quickList: [], // Array of language codes or function that returns such
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// The options are wide (4 columns), medium (2 columns), and narrow (1 column).
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// If not specified, it will be set automatically.
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menuWidth: null,
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showRegions: [ 'WW', 'AM', 'EU', 'ME', 'AF', 'AS', 'PA' ],
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languageDecorator: null // Callback function to be called when a language link is prepared - for custom decoration.
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};
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// Define a dummy i18n function, if jquery.i18n not integrated.
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if ( !$.fn.i18n ) {
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$.fn.i18n = function () {};
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}
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/*
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* Simple scrollIntoView plugin.
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* Scrolls the element to the viewport smoothly if it is not already.
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*/
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$.fn.scrollIntoView = function () {
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return this.each( function () {
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var scrollPosition,
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$window = $( window ),
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windowHeight = $window.height(),
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windowTop = $window.scrollTop(),
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windowBottom = windowTop + windowHeight,
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$element = $( this ),
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panelHeight = $element.height(),
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panelTop = $element.offset().top,
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panelBottom = panelTop + panelHeight;
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if ( ( panelTop < windowTop ) || ( panelBottom > windowBottom ) ) {
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if ( windowTop > panelTop ) {
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scrollPosition = panelTop;
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} else {
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scrollPosition = panelBottom - windowHeight;
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}
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$( 'html, body' ).stop().animate( {
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scrollTop: scrollPosition
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}, 500 );
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}
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} );
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};
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$.fn.uls.Constructor = ULS;
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}( jQuery ) );
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