7865a65bb0
Based on jquery.uls upstream version 982e2c32e7b3 https://github.com/wikimedia/jquery.uls/commit/982e2c32e7b3 Bug: 64797 Change-Id: Ia8b2ad22913693d2f88693091d288ca74d7d8c87
397 lines
11 KiB
JavaScript
397 lines
11 KiB
JavaScript
/**
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* Universal Language Selector
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* Language category display component - Used for showing the search results,
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* grouped by regions, scripts
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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 noResultsTemplate, LanguageCategoryDisplay;
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/*jshint multistr:true */
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noResultsTemplate = '<div class="twelve columns uls-no-results-view hide">\
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<h2 data-i18n="uls-no-results-found" class="eleven columns offset-by-one uls-no-results-found-title">\
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No results found\
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</h2>\
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<div id="uls-no-found-more" class="uls-no-found-more">\
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<div class="ten columns offset-by-one">\
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<p>\
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<span data-i18n="uls-search-help">You can search by language name, \
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script name, ISO code of language or \
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you can browse by region:</span>\
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<a class="uls-region-link" data-i18n="uls-region-AM" data-region="AM">America</a>, \
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<a class="uls-region-link" data-i18n="uls-region-EU" data-region="EU">Europe</a>, \
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<a class="uls-region-link" data-i18n="uls-region-ME" data-region="ME">Middle East</a>, \
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<a class="uls-region-link" data-i18n="uls-region-AF" data-region="AF">Africa</a>, \
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<a class="uls-region-link" data-i18n="uls-region-AS" data-region="AS">Asia</a>, \
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<a class="uls-region-link" data-i18n="uls-region-PA" data-region="PA">Pacific</a>, \
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<a class="uls-region-link" data-i18n="uls-region-WW" data-region="WW">Worldwide</a>.\
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</p>\
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</div>\
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</div>\
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</div>';
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/*jshint multistr:false */
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LanguageCategoryDisplay = function ( element, options ) {
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this.$element = $( element );
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this.options = $.extend( {}, $.fn.lcd.defaults, options );
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this.$element.addClass( 'lcd' );
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this.regionLanguages = {};
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this.renderTimeout = null;
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this.cachedQuicklist = null;
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this.$element.append( $( noResultsTemplate ) );
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this.$noResults = this.$element.children( '.uls-no-results-view' );
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this.render();
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this.listen();
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};
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LanguageCategoryDisplay.prototype = {
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constructor: LanguageCategoryDisplay,
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/**
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* Adds language to the language list.
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* @param {string} langCode
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* @param {string} [regionCode]
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* @return {bool} Whether the language was added.
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*/
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append: function ( langCode, regionCode ) {
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var lcd = this, i, regions;
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if ( !this.options.languages[langCode] ) {
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// Language is unknown or not in the list of languages for this context.
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return false;
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}
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if ( regionCode ) {
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regions = [regionCode];
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} else {
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regions = $.uls.data.getRegions( langCode );
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}
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// Worldwides only displayed once
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if ( $.inArray( 'WW', regions ) > -1 ) {
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regions = ['WW'];
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}
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for ( i = 0; i < regions.length; i++ ) {
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this.regionLanguages[regions[i]].push( langCode );
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}
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// Work around the bad interface, delay rendering until we have got
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// all the languages to speed up performance.
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window.clearTimeout( this.renderTimeout );
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this.renderTimeout = window.setTimeout( function () {
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lcd.renderRegions();
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}, 50 );
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return true;
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},
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render: function () {
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var $section,
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lcd = this,
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regions = [],
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regionNames = {
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// These are fallback text when i18n library not present
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WW: 'Worldwide',
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SP: 'Special',
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AM: 'America',
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EU: 'Europe',
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ME: 'Middle East',
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AS: 'Asia',
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AF: 'Africa',
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PA: 'Pacific'
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};
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regions.push( this.buildQuicklist() );
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$.each( $.uls.data.regiongroups, function ( regionCode ) {
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lcd.regionLanguages[regionCode] = [];
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// Don't show the region unless it was enabled
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if ( $.inArray( regionCode, lcd.options.showRegions ) === -1 ) {
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return;
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}
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$section = $( '<div>' )
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.addClass( 'eleven columns offset-by-one uls-lcd-region-section hide' )
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.attr( 'id', regionCode )
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.append(
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$( '<h3>' )
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.attr( 'data-i18n', 'uls-region-' + regionCode )
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.addClass( 'eleven columns uls-lcd-region-title' )
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.text( regionNames[regionCode] )
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);
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regions.push( $section );
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} );
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lcd.$element.append( regions );
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this.i18n();
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},
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/**
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* Renders a region and displays it if it has content.
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*/
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renderRegions: function () {
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var lcd = this, languages,
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items = lcd.options.itemsPerColumn,
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columns = 4;
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this.$noResults.addClass( 'hide' );
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this.$element.find( '.uls-lcd-region-section' ).each( function () {
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var $region = $( this ),
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regionCode = $region.attr( 'id' );
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if ( $region.is( '#uls-lcd-quicklist' ) ) {
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return;
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}
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$region.children( '.uls-language-block' ).remove();
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languages = lcd.regionLanguages[regionCode];
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if ( !languages || languages.length === 0 ) {
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$region.addClass( 'hide' );
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return;
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}
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lcd.renderRegion( $region, languages, items, columns );
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$region.removeClass( 'hide' );
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lcd.regionLanguages[regionCode] = [];
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} );
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},
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/**
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* Adds given languages sorted into rows and columns into given element.
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* @param {jQuery} $region Element to add language list.
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* @param {array} languages List of language codes.
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* @param {number} itemsPerColumn How many languages fit in a column.
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* @param {number} columnsPerRow How many columns fit in a row.
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*/
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renderRegion: function( $region, languages, itemsPerColumn, columnsPerRow ) {
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var i, lastItem, currentScript, nextScript, force,
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len = languages.length,
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items = [],
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columns = [],
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rows = [];
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for ( i = 0; i < len; i++ ) {
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force = false;
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nextScript = $.uls.data.getScriptGroupOfLanguage( languages[i+1] );
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lastItem = len - i === 1;
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// Force column break if script changes and column has more than one row already
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if ( i === 0 ) {
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currentScript = $.uls.data.getScriptGroupOfLanguage( languages[i] );
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} else if ( currentScript !== nextScript && items.length > 1 ) {
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force = true;
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}
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currentScript = nextScript;
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items.push( this.renderItem( languages[i] ) );
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if ( items.length >= itemsPerColumn || lastItem || force ) {
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columns.push( $( '<ul>' ).addClass( 'three columns' ).append( items ) );
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items = [];
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if ( columns.length >= columnsPerRow || lastItem ) {
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rows.push( $( '<div>' ).addClass( 'row uls-language-block' ).append( columns ) );
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columns = [];
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}
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}
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}
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$region.append( rows );
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},
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/**
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* Creates dom node representing one item in language list.
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* @param {string} code Language code
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* @return {Element}
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*/
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renderItem: function( code ) {
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var a, name, autonym, li;
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name = this.options.languages[code];
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autonym = $.uls.data.getAutonym( code ) || name || code;
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// Not using jQuery as this is performance hotspot
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li = document.createElement( 'li' );
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li.title = name;
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li.lang = code;
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li.dir = $.uls.data.getDir( code );
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li.setAttribute( 'data-code', code );
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a = document.createElement( 'a' );
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a.appendChild( document.createTextNode( autonym ) );
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a.className = 'autonym';
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li.appendChild( a );
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if ( this.options.languageDecorator ) {
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this.options.languageDecorator( $( a ), code );
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}
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return li;
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},
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i18n: function ( ) {
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this.$element.find( '[data-i18n]' ).i18n();
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},
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/**
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* Adds quicklist as a region.
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*/
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quicklist: function () {
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this.$element.find( '#uls-lcd-quicklist' ).removeClass( 'hide' );
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},
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buildQuicklist: function () {
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var quickList, $quickListSection, $quickListSectionTitle;
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if ( this.cachedQuicklist !== null ) {
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return this.cachedQuicklist;
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}
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if ( $.isFunction( this.options.quickList ) ) {
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this.options.quickList = this.options.quickList();
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}
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if ( !this.options.quickList ) {
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this.cachedQuicklist = $( [] );
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return this.cachedQuicklist;
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}
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// Pick only the first elements, because we don't have room for more
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quickList = this.options.quickList;
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quickList = quickList.slice( 0, 16 );
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quickList.sort( $.uls.data.sortByAutonym );
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$quickListSection = $( '<div>' )
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.addClass( 'eleven columns offset-by-one uls-lcd-region-section' )
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.attr( 'id', 'uls-lcd-quicklist' );
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$quickListSectionTitle = $( '<h3>' )
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.attr( 'data-i18n', 'uls-common-languages' )
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.addClass( 'eleven columns uls-lcd-region-title' )
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.text( 'Common languages' ); // This is placeholder text if jquery.i18n not present
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$quickListSection.append( $quickListSectionTitle );
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this.renderRegion( $quickListSection, quickList, 4, 4 );
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$quickListSectionTitle.i18n();
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this.cachedQuicklist = $quickListSection;
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return this.cachedQuicklist;
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},
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show: function () {
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if ( !this.regionDivs ) {
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this.render();
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}
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},
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empty: function () {
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this.$element.find( '#uls-lcd-quicklist' ).addClass( 'hide' );
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},
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focus: function () {
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this.$element.focus();
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},
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noResults: function () {
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this.$noResults.removeClass( 'hide' );
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if ( this.$noResults.find( '.uls-lcd-region-title' ).length ) {
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return;
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}
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var $suggestions = this.buildQuicklist().clone();
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$suggestions.find( 'h3' )
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.data( 'i18n', 'uls-no-results-suggestion-title' )
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.text( 'You may be interested in:' )
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.i18n();
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this.$noResults.find( 'h2' ).after( $suggestions );
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},
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listen: function () {
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var lcd = this;
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if ( this.options.clickhandler ) {
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this.$element.on( 'click', '.row li', function () {
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lcd.options.clickhandler.call( this, $( this ).data( 'code' ) );
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} );
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}
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// The region section need to be in sync with the map filter.
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lcd.$element.scroll( function () {
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var inview, inviewRegion,
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$ulsLanguageList = $( this ),
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scrollTop = $ulsLanguageList.position().top,
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scrollBottom = $ulsLanguageList.height();
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// The region section need to be in sync with the map filter.
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inviewRegion = 'WW';
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lcd.$element.find( '.uls-lcd-region-section' ).each( function () {
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var $lcdRegionSection = $( this ),
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top = $lcdRegionSection.position().top,
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height = $lcdRegionSection.height(),
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padding = 10;
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if ( top - padding <= scrollTop && height > scrollBottom ) {
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inviewRegion = $lcdRegionSection.attr( 'id' );
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}
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} );
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// highlight the region visible while scrolling in the map.
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inview = $.uls.data.regiongroups[inviewRegion];
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if ( !$( '#uls-region-' + inview ).hasClass( 'active' ) ) {
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$( '.regionselector' ).removeClass( 'active' );
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$( '#uls-region-' + inview ).addClass( 'active' );
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}
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} );
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}
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};
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$.fn.lcd = function ( option ) {
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return this.each( function () {
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var $this = $( this ),
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data = $this.data( 'lcd' ),
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options = typeof option === 'object' && option;
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if ( !data ) {
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$this.data( 'lcd', ( data = new LanguageCategoryDisplay( 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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$.fn.lcd.defaults = {
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languages: null,
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showRegions: ['WW', 'AM', 'EU', 'ME', 'AF', 'AS', 'PA'],
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itemsPerColumn: 8,
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languageDecorator: null
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};
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$.fn.lcd.Constructor = LanguageCategoryDisplay;
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} ( jQuery ) );
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