301 lines
7.6 KiB
JavaScript
301 lines
7.6 KiB
JavaScript
/*globals wp, _, jQuery */
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/**
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* wp.media.view.Attachments
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*
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* @class
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* @augments wp.media.View
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* @augments wp.Backbone.View
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* @augments Backbone.View
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*/
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var View = require( './view.js' ),
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Attachment = require( './attachment.js' ),
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$ = jQuery,
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Attachments;
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Attachments = View.extend({
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tagName: 'ul',
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className: 'attachments',
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attributes: {
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tabIndex: -1
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},
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initialize: function() {
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this.el.id = _.uniqueId('__attachments-view-');
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_.defaults( this.options, {
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refreshSensitivity: wp.media.isTouchDevice ? 300 : 200,
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refreshThreshold: 3,
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AttachmentView: Attachment,
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sortable: false,
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resize: true,
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idealColumnWidth: $( window ).width() < 640 ? 135 : 150
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});
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this._viewsByCid = {};
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this.$window = $( window );
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this.resizeEvent = 'resize.media-modal-columns';
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this.collection.on( 'add', function( attachment ) {
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this.views.add( this.createAttachmentView( attachment ), {
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at: this.collection.indexOf( attachment )
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});
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}, this );
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this.collection.on( 'remove', function( attachment ) {
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var view = this._viewsByCid[ attachment.cid ];
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delete this._viewsByCid[ attachment.cid ];
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if ( view ) {
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view.remove();
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}
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}, this );
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this.collection.on( 'reset', this.render, this );
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this.listenTo( this.controller, 'library:selection:add', this.attachmentFocus );
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// Throttle the scroll handler and bind this.
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this.scroll = _.chain( this.scroll ).bind( this ).throttle( this.options.refreshSensitivity ).value();
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this.options.scrollElement = this.options.scrollElement || this.el;
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$( this.options.scrollElement ).on( 'scroll', this.scroll );
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this.initSortable();
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_.bindAll( this, 'setColumns' );
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if ( this.options.resize ) {
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this.on( 'ready', this.bindEvents );
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this.controller.on( 'open', this.setColumns );
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// Call this.setColumns() after this view has been rendered in the DOM so
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// attachments get proper width applied.
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_.defer( this.setColumns, this );
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}
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},
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bindEvents: function() {
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this.$window.off( this.resizeEvent ).on( this.resizeEvent, _.debounce( this.setColumns, 50 ) );
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},
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attachmentFocus: function() {
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this.$( 'li:first' ).focus();
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},
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restoreFocus: function() {
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this.$( 'li.selected:first' ).focus();
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},
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arrowEvent: function( event ) {
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var attachments = this.$el.children( 'li' ),
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perRow = this.columns,
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index = attachments.filter( ':focus' ).index(),
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row = ( index + 1 ) <= perRow ? 1 : Math.ceil( ( index + 1 ) / perRow );
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if ( index === -1 ) {
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return;
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}
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// Left arrow
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if ( 37 === event.keyCode ) {
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if ( 0 === index ) {
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return;
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}
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attachments.eq( index - 1 ).focus();
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}
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// Up arrow
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if ( 38 === event.keyCode ) {
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if ( 1 === row ) {
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return;
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}
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attachments.eq( index - perRow ).focus();
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}
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// Right arrow
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if ( 39 === event.keyCode ) {
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if ( attachments.length === index ) {
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return;
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}
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attachments.eq( index + 1 ).focus();
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}
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// Down arrow
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if ( 40 === event.keyCode ) {
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if ( Math.ceil( attachments.length / perRow ) === row ) {
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return;
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}
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attachments.eq( index + perRow ).focus();
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}
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},
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dispose: function() {
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this.collection.props.off( null, null, this );
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if ( this.options.resize ) {
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this.$window.off( this.resizeEvent );
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}
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/**
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* call 'dispose' directly on the parent class
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*/
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View.prototype.dispose.apply( this, arguments );
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},
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setColumns: function() {
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var prev = this.columns,
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width = this.$el.width();
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if ( width ) {
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this.columns = Math.min( Math.round( width / this.options.idealColumnWidth ), 12 ) || 1;
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if ( ! prev || prev !== this.columns ) {
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this.$el.closest( '.media-frame-content' ).attr( 'data-columns', this.columns );
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}
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}
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},
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initSortable: function() {
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var collection = this.collection;
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if ( wp.media.isTouchDevice || ! this.options.sortable || ! $.fn.sortable ) {
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return;
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}
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this.$el.sortable( _.extend({
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// If the `collection` has a `comparator`, disable sorting.
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disabled: !! collection.comparator,
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// Change the position of the attachment as soon as the
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// mouse pointer overlaps a thumbnail.
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tolerance: 'pointer',
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// Record the initial `index` of the dragged model.
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start: function( event, ui ) {
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ui.item.data('sortableIndexStart', ui.item.index());
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},
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// Update the model's index in the collection.
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// Do so silently, as the view is already accurate.
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update: function( event, ui ) {
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var model = collection.at( ui.item.data('sortableIndexStart') ),
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comparator = collection.comparator;
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// Temporarily disable the comparator to prevent `add`
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// from re-sorting.
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delete collection.comparator;
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// Silently shift the model to its new index.
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collection.remove( model, {
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silent: true
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});
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collection.add( model, {
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silent: true,
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at: ui.item.index()
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});
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// Restore the comparator.
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collection.comparator = comparator;
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// Fire the `reset` event to ensure other collections sync.
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collection.trigger( 'reset', collection );
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// If the collection is sorted by menu order,
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// update the menu order.
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collection.saveMenuOrder();
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}
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}, this.options.sortable ) );
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// If the `orderby` property is changed on the `collection`,
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// check to see if we have a `comparator`. If so, disable sorting.
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collection.props.on( 'change:orderby', function() {
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this.$el.sortable( 'option', 'disabled', !! collection.comparator );
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}, this );
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this.collection.props.on( 'change:orderby', this.refreshSortable, this );
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this.refreshSortable();
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},
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refreshSortable: function() {
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if ( wp.media.isTouchDevice || ! this.options.sortable || ! $.fn.sortable ) {
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return;
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}
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// If the `collection` has a `comparator`, disable sorting.
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var collection = this.collection,
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orderby = collection.props.get('orderby'),
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enabled = 'menuOrder' === orderby || ! collection.comparator;
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this.$el.sortable( 'option', 'disabled', ! enabled );
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},
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/**
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* @param {wp.media.model.Attachment} attachment
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* @returns {wp.media.View}
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*/
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createAttachmentView: function( attachment ) {
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var view = new this.options.AttachmentView({
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controller: this.controller,
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model: attachment,
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collection: this.collection,
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selection: this.options.selection
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});
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return this._viewsByCid[ attachment.cid ] = view;
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},
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prepare: function() {
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// Create all of the Attachment views, and replace
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// the list in a single DOM operation.
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if ( this.collection.length ) {
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this.views.set( this.collection.map( this.createAttachmentView, this ) );
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// If there are no elements, clear the views and load some.
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} else {
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this.views.unset();
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this.collection.more().done( this.scroll );
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}
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},
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ready: function() {
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// Trigger the scroll event to check if we're within the
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// threshold to query for additional attachments.
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this.scroll();
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},
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scroll: function() {
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var view = this,
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el = this.options.scrollElement,
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scrollTop = el.scrollTop,
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toolbar;
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// The scroll event occurs on the document, but the element
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// that should be checked is the document body.
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if ( el === document ) {
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el = document.body;
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scrollTop = $(document).scrollTop();
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}
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if ( ! $(el).is(':visible') || ! this.collection.hasMore() ) {
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return;
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}
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toolbar = this.views.parent.toolbar;
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// Show the spinner only if we are close to the bottom.
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if ( el.scrollHeight - ( scrollTop + el.clientHeight ) < el.clientHeight / 3 ) {
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toolbar.get('spinner').show();
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}
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if ( el.scrollHeight < scrollTop + ( el.clientHeight * this.options.refreshThreshold ) ) {
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this.collection.more().done(function() {
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view.scroll();
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toolbar.get('spinner').hide();
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});
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}
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}
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});
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module.exports = Attachments;
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