/**

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* @output wp-admin/js/theme.js

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*/

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/* global _wpThemeSettings, confirm, tb_position */

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window.wp = window.wp || {};

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( function($) {

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// Set up our namespace...

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var themes, l10n;

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themes = wp.themes = wp.themes || {};

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// Store the theme data and settings for organized and quick access.

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// themes.data.settings, themes.data.themes, themes.data.l10n.

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themes.data = _wpThemeSettings;

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l10n = themes.data.l10n;

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// Shortcut for isInstall check.

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themes.isInstall = !! themes.data.settings.isInstall;

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// Setup app structure.

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_.extend( themes, { model: {}, view: {}, routes: {}, router: {}, template: wp.template });

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themes.Model = Backbone.Model.extend({

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// Adds attributes to the default data coming through the .org themes api.

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// Map `id` to `slug` for shared code.

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initialize: function() {

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var description;

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if ( this.get( 'slug' ) ) {

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// If the theme is already installed, set an attribute.

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if ( _.indexOf( themes.data.installedThemes, this.get( 'slug' ) ) !== -1 ) {

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this.set({ installed: true });

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}

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// If the theme is active, set an attribute.

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if ( themes.data.activeTheme === this.get( 'slug' ) ) {

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this.set({ active: true });

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}

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}

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// Set the attributes.

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this.set({

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// `slug` is for installation, `id` is for existing.

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id: this.get( 'slug' ) || this.get( 'id' )

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});

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// Map `section.description` to `description`

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// as the API sometimes returns it differently.

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if ( this.has( 'sections' ) ) {

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description = this.get( 'sections' ).description;

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this.set({ description: description });

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}

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}

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});

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// Main view controller for themes.php.

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// Unifies and renders all available views.

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themes.view.Appearance = wp.Backbone.View.extend({

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el: '#wpbody-content .wrap .theme-browser',

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window: $( window ),

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// Pagination instance.

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page: 0,

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// Sets up a throttler for binding to 'scroll'.

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initialize: function( options ) {

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// Scroller checks how far the scroll position is.

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_.bindAll( this, 'scroller' );

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this.SearchView = options.SearchView ? options.SearchView : themes.view.Search;

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// Bind to the scroll event and throttle

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// the results from this.scroller.

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this.window.on( 'scroll', _.throttle( this.scroller, 300 ) );

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},

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// Main render control.

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render: function() {

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// Setup the main theme view

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// with the current theme collection.

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this.view = new themes.view.Themes({

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collection: this.collection,

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parent: this

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});

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// Render search form.

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this.search();

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this.$el.removeClass( 'search-loading' );

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// Render and append.

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this.view.render();

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this.$el.empty().append( this.view.el ).addClass( 'rendered' );

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},

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// Defines search element container.

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searchContainer: $( '.search-form' ),

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// Search input and view

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// for current theme collection.

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search: function() {

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var view,

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self = this;

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// Don't render the search if there is only one theme.

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if ( themes.data.themes.length === 1 ) {

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return;

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}

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view = new this.SearchView({

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collection: self.collection,

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parent: this

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});

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self.SearchView = view;

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// Render and append after screen title.

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view.render();

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this.searchContainer

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.find( '.search-box' )

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.append( $.parseHTML( '<label for="wp-filter-search-input">' + l10n.search + '</label>' ) )

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.append( view.el );

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this.searchContainer.on( 'submit', function( event ) {

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event.preventDefault();

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});

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},

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// Checks when the user gets close to the bottom

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// of the mage and triggers a theme:scroll event.

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scroller: function() {

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var self = this,

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bottom, threshold;

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bottom = this.window.scrollTop() + self.window.height();

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threshold = self.$el.offset().top + self.$el.outerHeight( false ) - self.window.height();

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threshold = Math.round( threshold * 0.9 );

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if ( bottom > threshold ) {

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this.trigger( 'theme:scroll' );

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}

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}

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});

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// Set up the Collection for our theme data.

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// @has 'id' 'name' 'screenshot' 'author' 'authorURI' 'version' 'active' ...

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themes.Collection = Backbone.Collection.extend({

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model: themes.Model,

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// Search terms.

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terms: '',

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// Controls searching on the current theme collection

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// and triggers an update event.

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doSearch: function( value ) {

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// Don't do anything if we've already done this search.

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// Useful because the Search handler fires multiple times per keystroke.

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if ( this.terms === value ) {

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return;

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}

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// Updates terms with the value passed.

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this.terms = value;

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// If we have terms, run a search...

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if ( this.terms.length > 0 ) {

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this.search( this.terms );

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}

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// If search is blank, show all themes.

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// Useful for resetting the views when you clean the input.

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if ( this.terms === '' ) {

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this.reset( themes.data.themes );

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$( 'body' ).removeClass( 'no-results' );

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}

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// Trigger a 'themes:update' event.

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this.trigger( 'themes:update' );

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},

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/**

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* Performs a search within the collection.

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*

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* @uses RegExp

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*/

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search: function( term ) {

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var match, results, haystack, name, description, author;

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// Start with a full collection.

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this.reset( themes.data.themes, { silent: true } );

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// Trim the term.

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term = term.trim();

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// Escape the term string for RegExp meta characters.

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term = term.replace( /[-\/\\^$*+?.()|[\]{}]/g, '\\$&' );

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// Consider spaces as word delimiters and match the whole string

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// so matching terms can be combined.

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term = term.replace( / /g, ')(?=.*' );

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match = new RegExp( '^(?=.*' + term + ').+', 'i' );

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// Find results.

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// _.filter() and .test().

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results = this.filter( function( data ) {

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name = data.get( 'name' ).replace( /(<([^>]+)>)/ig, '' );

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description = data.get( 'description' ).replace( /(<([^>]+)>)/ig, '' );

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author = data.get( 'author' ).replace( /(<([^>]+)>)/ig, '' );

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haystack = _.union( [ name, data.get( 'id' ), description, author, data.get( 'tags' ) ] );

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if ( match.test( data.get( 'author' ) ) && term.length > 2 ) {

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data.set( 'displayAuthor', true );

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}

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return match.test( haystack );

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});

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if ( results.length === 0 ) {

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this.trigger( 'query:empty' );

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} else {

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$( 'body' ).removeClass( 'no-results' );

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}

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this.reset( results );

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},

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// Paginates the collection with a helper method

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// that slices the collection.

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paginate: function( instance ) {

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var collection = this;

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instance = instance || 0;

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// Themes per instance are set at 20.

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collection = _( collection.rest( 20 * instance ) );

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collection = _( collection.first( 20 ) );

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return collection;

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},

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count: false,

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/*

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* Handles requests for more themes and caches results.

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*

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*

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* When we are missing a cache object we fire an apiCall()

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* which triggers events of `query:success` or `query:fail`.

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*/

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query: function( request ) {

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/**

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* @static

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* @type Array

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*/

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var queries = this.queries,

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self = this,

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query, isPaginated, count;

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// Store current query request args

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// for later use with the event `theme:end`.

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this.currentQuery.request = request;

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// Search the query cache for matches.

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query = _.find( queries, function( query ) {

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return _.isEqual( query.request, request );

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});

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// If the request matches the stored currentQuery.request

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// it means we have a paginated request.

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isPaginated = _.has( request, 'page' );

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// Reset the internal api page counter for non-paginated queries.

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if ( ! isPaginated ) {

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this.currentQuery.page = 1;

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}

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// Otherwise, send a new API call and add it to the cache.

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if ( ! query && ! isPaginated ) {

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query = this.apiCall( request ).done( function( data ) {

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// Update the collection with the queried data.

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if ( data.themes ) {

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self.reset( data.themes );

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count = data.info.results;

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// Store the results and the query request.

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queries.push( { themes: data.themes, request: request, total: count } );

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}

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// Trigger a collection refresh event

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// and a `query:success` event with a `count` argument.

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self.trigger( 'themes:update' );

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self.trigger( 'query:success', count );

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if ( data.themes && data.themes.length === 0 ) {

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self.trigger( 'query:empty' );

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}

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}).fail( function() {

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self.trigger( 'query:fail' );

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});

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} else {

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// If it's a paginated request we need to fetch more themes...

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if ( isPaginated ) {

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return this.apiCall( request, isPaginated ).done( function( data ) {

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// Add the new themes to the current collection.

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// @todo Update counter.

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self.add( data.themes );

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self.trigger( 'query:success' );

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// We are done loading themes for now.

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self.loadingThemes = false;

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}).fail( function() {

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self.trigger( 'query:fail' );

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});

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}

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if ( query.themes.length === 0 ) {

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self.trigger( 'query:empty' );

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} else {

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$( 'body' ).removeClass( 'no-results' );

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}

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// Only trigger an update event since we already have the themes

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// on our cached object.

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if ( _.isNumber( query.total ) ) {

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this.count = query.total;

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}

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this.reset( query.themes );

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if ( ! query.total ) {

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this.count = this.length;

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}

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this.trigger( 'themes:update' );

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this.trigger( 'query:success', this.count );

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}

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},

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// Local cache array for API queries.

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queries: [],

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// Keep track of current query so we can handle pagination.

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currentQuery: {

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page: 1,

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request: {}

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},

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// Send request to api.wordpress.org/themes.

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apiCall: function( request, paginated ) {

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return wp.ajax.send( 'query-themes', {

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data: {

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// Request data.

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request: _.extend({

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per_page: 100

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}, request)

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},

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beforeSend: function() {

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if ( ! paginated ) {

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// Spin it.

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$( 'body' ).addClass( 'loading-content' ).removeClass( 'no-results' );

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}

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}

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});

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},

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// Static status controller for when we are loading themes.

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loadingThemes: false

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});

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// This is the view that controls each theme item

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// that will be displayed on the screen.

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themes.view.Theme = wp.Backbone.View.extend({

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// Wrap theme data on a div.theme element.

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className: 'theme',

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// Reflects which theme view we have.

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// 'grid' (default) or 'detail'.

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state: 'grid',

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// The HTML template for each element to be rendered.

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html: themes.template( 'theme' ),

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events: {

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'click': themes.isInstall ? 'preview': 'expand',

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'keydown': themes.isInstall ? 'preview': 'expand',

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'touchend': themes.isInstall ? 'preview': 'expand',

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'keyup': 'addFocus',

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'touchmove': 'preventExpand',

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'click .theme-install': 'installTheme',

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'click .update-message': 'updateTheme'

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},

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touchDrag: false,

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initialize: function() {

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this.model.on( 'change', this.render, this );

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},

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render: function() {

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var data = this.model.toJSON();

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// Render themes using the html template.

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this.$el.html( this.html( data ) ).attr( 'data-slug', data.id );

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// Renders active theme styles.

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this.activeTheme();

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if ( this.model.get( 'displayAuthor' ) ) {

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this.$el.addClass( 'display-author' );

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}

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},

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// Adds a class to the currently active theme

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// and to the overlay in detailed view mode.

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activeTheme: function() {

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if ( this.model.get( 'active' ) ) {

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this.$el.addClass( 'active' );

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}

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},

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// Add class of focus to the theme we are focused on.

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addFocus: function() {

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var $themeToFocus = ( $( ':focus' ).hasClass( 'theme' ) ) ? $( ':focus' ) : $(':focus').parents('.theme');

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$('.theme.focus').removeClass('focus');

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$themeToFocus.addClass('focus');

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},

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// Single theme overlay screen.

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// It's shown when clicking a theme.

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expand: function( event ) {

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var self = this;

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event = event || window.event;

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// 'Enter' and 'Space' keys expand the details view when a theme is :focused.

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if ( event.type === 'keydown' && ( event.which !== 13 && event.which !== 32 ) ) {

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return;

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}

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// Bail if the user scrolled on a touch device.

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if ( this.touchDrag === true ) {

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return this.touchDrag = false;

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}

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// Prevent the modal from showing when the user clicks

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// one of the direct action buttons.

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if ( $( event.target ).is( '.theme-actions a' ) ) {

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return;

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}

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// Prevent the modal from showing when the user clicks one of the direct action buttons.

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if ( $( event.target ).is( '.theme-actions a, .update-message, .button-link, .notice-dismiss' ) ) {

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return;

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}

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// Set focused theme to current element.

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themes.focusedTheme = this.$el;

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this.trigger( 'theme:expand', self.model.cid );

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},

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preventExpand: function() {

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this.touchDrag = true;

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},

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preview: function( event ) {

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var self = this,

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current, preview;

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event = event || window.event;

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// Bail if the user scrolled on a touch device.

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if ( this.touchDrag === true ) {

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return this.touchDrag = false;

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}

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// Allow direct link path to installing a theme.

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if ( $( event.target ).not( '.install-theme-preview' ).parents( '.theme-actions' ).length ) {

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return;

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}

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// 'Enter' and 'Space' keys expand the details view when a theme is :focused.

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if ( event.type === 'keydown' && ( event.which !== 13 && event.which !== 32 ) ) {

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return;

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}

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// Pressing Enter while focused on the buttons shouldn't open the preview.

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if ( event.type === 'keydown' && event.which !== 13 && $( ':focus' ).hasClass( 'button' ) ) {

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return;

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}

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event.preventDefault();

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