HTML Examples/WP.iso/wordpress/wp-includes/js/media-editor.js

JavaScript | 2017-09-08 | 28.2 KB | 1,059 lines

/* global getUserSetting, tinymce, QTags */

// WordPress, TinyMCE, and Media
// -----------------------------
(function($, _){
    /**
     * Stores the editors' `wp.media.controller.Frame` instances.
     *
     * @static
     */
    var workflows = {};

    /**
     * A helper mixin function to avoid truthy and falsey values being
     *   passed as an input that expects booleans. If key is undefined in the map,
     *   but has a default value, set it.
     *
     * @param {object} attrs Map of props from a shortcode or settings.
     * @param {string} key The key within the passed map to check for a value.
     * @returns {mixed|undefined} The original or coerced value of key within attrs
     */
    wp.media.coerce = function ( attrs, key ) {
        if ( _.isUndefined( attrs[ key ] ) && ! _.isUndefined( this.defaults[ key ] ) ) {
            attrs[ key ] = this.defaults[ key ];
        } else if ( 'true' === attrs[ key ] ) {
            attrs[ key ] = true;
        } else if ( 'false' === attrs[ key ] ) {
            attrs[ key ] = false;
        }
        return attrs[ key ];
    };

    /** @namespace wp.media.string */
    wp.media.string = {
        /**
         * Joins the `props` and `attachment` objects,
         * outputting the proper object format based on the
         * attachment's type.
         *
         * @param {Object} [props={}] Attachment details (align, link, size, etc).
         * @param {Object} attachment The attachment object, media version of Post.
         * @returns {Object} Joined props
         */
        props: function( props, attachment ) {
            var link, linkUrl, size, sizes,
                defaultProps = wp.media.view.settings.defaultProps;

            props = props ? _.clone( props ) : {};

            if ( attachment && attachment.type ) {
                props.type = attachment.type;
            }

            if ( 'image' === props.type ) {
                props = _.defaults( props || {}, {
                    align:   defaultProps.align || getUserSetting( 'align', 'none' ),
                    size:    defaultProps.size  || getUserSetting( 'imgsize', 'medium' ),
                    url:     '',
                    classes: []
                });
            }

            // All attachment-specific settings follow.
            if ( ! attachment ) {
                return props;
            }

            props.title = props.title || attachment.title;

            link = props.link || defaultProps.link || getUserSetting( 'urlbutton', 'file' );
            if ( 'file' === link || 'embed' === link ) {
                linkUrl = attachment.url;
            } else if ( 'post' === link ) {
                linkUrl = attachment.link;
            } else if ( 'custom' === link ) {
                linkUrl = props.linkUrl;
            }
            props.linkUrl = linkUrl || '';

            // Format properties for images.
            if ( 'image' === attachment.type ) {
                props.classes.push( 'wp-image-' + attachment.id );

                sizes = attachment.sizes;
                size = sizes && sizes[ props.size ] ? sizes[ props.size ] : attachment;

                _.extend( props, _.pick( attachment, 'align', 'caption', 'alt' ), {
                    width:     size.width,
                    height:    size.height,
                    src:       size.url,
                    captionId: 'attachment_' + attachment.id
                });
            } else if ( 'video' === attachment.type || 'audio' === attachment.type ) {
                _.extend( props, _.pick( attachment, 'title', 'type', 'icon', 'mime' ) );
            // Format properties for non-images.
            } else {
                props.title = props.title || attachment.filename;
                props.rel = props.rel || 'attachment wp-att-' + attachment.id;
            }

            return props;
        },
        /**
         * Create link markup that is suitable for passing to the editor
         *
         * @param {Object} props Attachment details (align, link, size, etc).
         * @param {Object} attachment The attachment object, media version of Post.
         * @returns {string} The link markup
         */
        link: function( props, attachment ) {
            var options;

            props = wp.media.string.props( props, attachment );

            options = {
                tag:     'a',
                content: props.title,
                attrs:   {
                    href: props.linkUrl
                }
            };

            if ( props.rel ) {
                options.attrs.rel = props.rel;
            }

            return wp.html.string( options );
        },
        /**
         * Create an Audio shortcode string that is suitable for passing to the editor
         *
         * @param {Object} props Attachment details (align, link, size, etc).
         * @param {Object} attachment The attachment object, media version of Post.
         * @returns {string} The audio shortcode
         */
        audio: function( props, attachment ) {
            return wp.media.string._audioVideo( 'audio', props, attachment );
        },
        /**
         * Create a Video shortcode string that is suitable for passing to the editor
         *
         * @param {Object} props Attachment details (align, link, size, etc).
         * @param {Object} attachment The attachment object, media version of Post.
         * @returns {string} The video shortcode
         */
        video: function( props, attachment ) {
            return wp.media.string._audioVideo( 'video', props, attachment );
        },
        /**
         * Helper function to create a media shortcode string
         *
         * @access private
         *
         * @param {string} type The shortcode tag name: 'audio' or 'video'.
         * @param {Object} props Attachment details (align, link, size, etc).
         * @param {Object} attachment The attachment object, media version of Post.
         * @returns {string} The media shortcode
         */
        _audioVideo: function( type, props, attachment ) {
            var shortcode, html, extension;

            props = wp.media.string.props( props, attachment );
            if ( props.link !== 'embed' )
                return wp.media.string.link( props );

            shortcode = {};

            if ( 'video' === type ) {
                if ( attachment.image && -1 === attachment.image.src.indexOf( attachment.icon ) ) {
                    shortcode.poster = attachment.image.src;
                }

                if ( attachment.width ) {
                    shortcode.width = attachment.width;
                }

                if ( attachment.height ) {
                    shortcode.height = attachment.height;
                }
            }

            extension = attachment.filename.split('.').pop();

            if ( _.contains( wp.media.view.settings.embedExts, extension ) ) {
                shortcode[extension] = attachment.url;
            } else {
                // Render unsupported audio and video files as links.
                return wp.media.string.link( props );
            }

            html = wp.shortcode.string({
                tag:     type,
                attrs:   shortcode
            });

            return html;
        },
        /**
         * Create image markup, optionally with a link and/or wrapped in a caption shortcode,
         *  that is suitable for passing to the editor
         *
         * @param {Object} props Attachment details (align, link, size, etc).
         * @param {Object} attachment The attachment object, media version of Post.
         * @returns {string}
         */
        image: function( props, attachment ) {
            var img = {},
                options, classes, shortcode, html;

            props.type = 'image';
            props = wp.media.string.props( props, attachment );
            classes = props.classes || [];

            img.src = ! _.isUndefined( attachment ) ? attachment.url : props.url;
            _.extend( img, _.pick( props, 'width', 'height', 'alt' ) );

            // Only assign the align class to the image if we're not printing
            // a caption, since the alignment is sent to the shortcode.
            if ( props.align && ! props.caption ) {
                classes.push( 'align' + props.align );
            }

            if ( props.size ) {
                classes.push( 'size-' + props.size );
            }

            img['class'] = _.compact( classes ).join(' ');

            // Generate `img` tag options.
            options = {
                tag:    'img',
                attrs:  img,
                single: true
            };

            // Generate the `a` element options, if they exist.
            if ( props.linkUrl ) {
                options = {
                    tag:   'a',
                    attrs: {
                        href: props.linkUrl
                    },
                    content: options
                };
            }

            html = wp.html.string( options );

            // Generate the caption shortcode.
            if ( props.caption ) {
                shortcode = {};

                if ( img.width ) {
                    shortcode.width = img.width;
                }

                if ( props.captionId ) {
                    shortcode.id = props.captionId;
                }

                if ( props.align ) {
                    shortcode.align = 'align' + props.align;
                }

                html = wp.shortcode.string({
                    tag:     'caption',
                    attrs:   shortcode,
                    content: html + ' ' + props.caption
                });
            }

            return html;
        }
    };

    wp.media.embed = {
        coerce : wp.media.coerce,

        defaults : {
            url : '',
            width: '',
            height: ''
        },

        edit : function( data, isURL ) {
            var frame, props = {}, shortcode;

            if ( isURL ) {
                props.url = data.replace(/<[^>]+>/g, '');
            } else {
                shortcode = wp.shortcode.next( 'embed', data ).shortcode;

                props = _.defaults( shortcode.attrs.named, this.defaults );
                if ( shortcode.content ) {
                    props.url = shortcode.content;
                }
            }

            frame = wp.media({
                frame: 'post',
                state: 'embed',
                metadata: props
            });

            return frame;
        },

        shortcode : function( model ) {
            var self = this, content;

            _.each( this.defaults, function( value, key ) {
                model[ key ] = self.coerce( model, key );

                if ( value === model[ key ] ) {
                    delete model[ key ];
                }
            });

            content = model.url;
            delete model.url;

            return new wp.shortcode({
                tag: 'embed',
                attrs: model,
                content: content
            });
        }
    };

    /**
     * @class wp.media.collection
     *
     * @param {Object} attributes
     */
    wp.media.collection = function(attributes) {
        var collections = {};

        return _.extend(/** @lends wp.media.collection.prototype */{
            coerce : wp.media.coerce,
            /**
             * Retrieve attachments based on the properties of the passed shortcode
             *
             * @param {wp.shortcode} shortcode An instance of wp.shortcode().
             * @returns {wp.media.model.Attachments} A Backbone.Collection containing
             *      the media items belonging to a collection.
             *      The query[ this.tag ] property is a Backbone.Model
             *          containing the 'props' for the collection.
             */
            attachments: function( shortcode ) {
                var shortcodeString = shortcode.string(),
                    result = collections[ shortcodeString ],
                    attrs, args, query, others, self = this;

                delete collections[ shortcodeString ];
                if ( result ) {
                    return result;
                }
                // Fill the default shortcode attributes.
                attrs = _.defaults( shortcode.attrs.named, this.defaults );
                args  = _.pick( attrs, 'orderby', 'order' );

                args.type    = this.type;
                args.perPage = -1;

                // Mark the `orderby` override attribute.
                if ( undefined !== attrs.orderby ) {
                    attrs._orderByField = attrs.orderby;
                }

                if ( 'rand' === attrs.orderby ) {
                    attrs._orderbyRandom = true;
                }

                // Map the `orderby` attribute to the corresponding model property.
                if ( ! attrs.orderby || /^menu_order(?: ID)?$/i.test( attrs.orderby ) ) {
                    args.orderby = 'menuOrder';
                }

                // Map the `ids` param to the correct query args.
                if ( attrs.ids ) {
                    args.post__in = attrs.ids.split(',');
                    args.orderby  = 'post__in';
                } else if ( attrs.include ) {
                    args.post__in = attrs.include.split(',');
                }

                if ( attrs.exclude ) {
                    args.post__not_in = attrs.exclude.split(',');
                }

                if ( ! args.post__in ) {
                    args.uploadedTo = attrs.id;
                }

                // Collect the attributes that were not included in `args`.
                others = _.omit( attrs, 'id', 'ids', 'include', 'exclude', 'orderby', 'order' );

                _.each( this.defaults, function( value, key ) {
                    others[ key ] = self.coerce( others, key );
                });

                query = wp.media.query( args );
                query[ this.tag ] = new Backbone.Model( others );
                return query;
            },
            /**
             * Triggered when clicking 'Insert {label}' or 'Update {label}'
             *
             * @param {wp.media.model.Attachments} attachments A Backbone.Collection containing
             *      the media items belonging to a collection.
             *      The query[ this.tag ] property is a Backbone.Model
             *          containing the 'props' for the collection.
             * @returns {wp.shortcode}
             */
            shortcode: function( attachments ) {
                var props = attachments.props.toJSON(),
                    attrs = _.pick( props, 'orderby', 'order' ),
                    shortcode, clone;

                if ( attachments.type ) {
                    attrs.type = attachments.type;
                    delete attachments.type;
                }

                if ( attachments[this.tag] ) {
                    _.extend( attrs, attachments[this.tag].toJSON() );
                }

                // Convert all gallery shortcodes to use the `ids` property.
                // Ignore `post__in` and `post__not_in`; the attachments in
                // the collection will already reflect those properties.
                attrs.ids = attachments.pluck('id');

                // Copy the `uploadedTo` post ID.
                if ( props.uploadedTo ) {
                    attrs.id = props.uploadedTo;
                }
                // Check if the gallery is randomly ordered.
                delete attrs.orderby;

                if ( attrs._orderbyRandom ) {
                    attrs.orderby = 'rand';
                } else if ( attrs._orderByField && attrs._orderByField != 'rand' ) {
                    attrs.orderby = attrs._orderByField;
                }

                delete attrs._orderbyRandom;
                delete attrs._orderByField;

                // If the `ids` attribute is set and `orderby` attribute
                // is the default value, clear it for cleaner output.
                if ( attrs.ids && 'post__in' === attrs.orderby ) {
                    delete attrs.orderby;
                }

                attrs = this.setDefaults( attrs );

                shortcode = new wp.shortcode({
                    tag:    this.tag,
                    attrs:  attrs,
                    type:   'single'
                });

                // Use a cloned version of the gallery.
                clone = new wp.media.model.Attachments( attachments.models, {
                    props: props
                });
                clone[ this.tag ] = attachments[ this.tag ];
                collections[ shortcode.string() ] = clone;

                return shortcode;
            },
            /**
             * Triggered when double-clicking a collection shortcode placeholder
             *   in the editor
             *
             * @param {string} content Content that is searched for possible
             *    shortcode markup matching the passed tag name,
             *
             * @this wp.media.{prop}
             *
             * @returns {wp.media.view.MediaFrame.Select} A media workflow.
             */
            edit: function( content ) {
                var shortcode = wp.shortcode.next( this.tag, content ),
                    defaultPostId = this.defaults.id,
                    attachments, selection, state;

                // Bail if we didn't match the shortcode or all of the content.
                if ( ! shortcode || shortcode.content !== content ) {
                    return;
                }

                // Ignore the rest of the match object.
                shortcode = shortcode.shortcode;

                if ( _.isUndefined( shortcode.get('id') ) && ! _.isUndefined( defaultPostId ) ) {
                    shortcode.set( 'id', defaultPostId );
                }

                attachments = this.attachments( shortcode );

                selection = new wp.media.model.Selection( attachments.models, {
                    props:    attachments.props.toJSON(),
                    multiple: true
                });

                selection[ this.tag ] = attachments[ this.tag ];

                // Fetch the query's attachments, and then break ties from the
                // query to allow for sorting.
                selection.more().done( function() {
                    // Break ties with the query.
                    selection.props.set({ query: false });
                    selection.unmirror();
                    selection.props.unset('orderby');
                });

                // Destroy the previous gallery frame.
                if ( this.frame ) {
                    this.frame.dispose();
                }

                if ( shortcode.attrs.named.type && 'video' === shortcode.attrs.named.type ) {
                    state = 'video-' + this.tag + '-edit';
                } else {
                    state = this.tag + '-edit';
                }

                // Store the current frame.
                this.frame = wp.media({
                    frame:     'post',
                    state:     state,
                    title:     this.editTitle,
                    editing:   true,
                    multiple:  true,
                    selection: selection
                }).open();

                return this.frame;
            },

            setDefaults: function( attrs ) {
                var self = this;
                // Remove default attributes from the shortcode.
                _.each( this.defaults, function( value, key ) {
                    attrs[ key ] = self.coerce( attrs, key );
                    if ( value === attrs[ key ] ) {
                        delete attrs[ key ];
                    }
                });

                return attrs;
            }
        }, attributes );
    };

    wp.media._galleryDefaults = {
        itemtag: 'dl',
        icontag: 'dt',
        captiontag: 'dd',
        columns: '3',
        link: 'post',
        size: 'thumbnail',
        order: 'ASC',
        id: wp.media.view.settings.post && wp.media.view.settings.post.id,
        orderby : 'menu_order ID'
    };

    if ( wp.media.view.settings.galleryDefaults ) {
        wp.media.galleryDefaults = _.extend( {}, wp.media._galleryDefaults, wp.media.view.settings.galleryDefaults );
    } else {
        wp.media.galleryDefaults = wp.media._galleryDefaults;
    }

    wp.media.gallery = new wp.media.collection({
        tag: 'gallery',
        type : 'image',
        editTitle : wp.media.view.l10n.editGalleryTitle,
        defaults : wp.media.galleryDefaults,

        setDefaults: function( attrs ) {
            var self = this, changed = ! _.isEqual( wp.media.galleryDefaults, wp.media._galleryDefaults );
            _.each( this.defaults, function( value, key ) {
                attrs[ key ] = self.coerce( attrs, key );
                if ( value === attrs[ key ] && ( ! changed || value === wp.media._galleryDefaults[ key ] ) ) {
                    delete attrs[ key ];
                }
            } );
            return attrs;
        }
    });

    /**
     * @namespace wp.media.featuredImage
     * @memberOf wp.media
     */
    wp.media.featuredImage = {
        /**
         * Get the featured image post ID
         *
         * @returns {wp.media.view.settings.post.featuredImageId|number}
         */
        get: function() {
            return wp.media.view.settings.post.featuredImageId;
        },
        /**
         * Set the featured image id, save the post thumbnail data and
         * set the HTML in the post meta box to the new featured image.
         *
         * @param {number} id The post ID of the featured image, or -1 to unset it.
         */
        set: function( id ) {
            var settings = wp.media.view.settings;

            settings.post.featuredImageId = id;

            wp.media.post( 'get-post-thumbnail-html', {
                post_id:      settings.post.id,
                thumbnail_id: settings.post.featuredImageId,
                _wpnonce:     settings.post.nonce
            }).done( function( html ) {
                if ( html == '0' ) {
                    window.alert( window.setPostThumbnailL10n.error );
                    return;
                }
                $( '.inside', '#postimagediv' ).html( html );
            });
        },
        /**
         * Remove the featured image id, save the post thumbnail data and
         * set the HTML in the post meta box to no featured image.
         */
        remove: function() {
            wp.media.featuredImage.set( -1 );
        },
        /**
         * The Featured Image workflow
         *
         * @this wp.media.featuredImage
         *
         * @returns {wp.media.view.MediaFrame.Select} A media workflow.
         */
        frame: function() {
            if ( this._frame ) {
                wp.media.frame = this._frame;
                return this._frame;
            }

            this._frame = wp.media({
                state: 'featured-image',
                states: [ new wp.media.controller.FeaturedImage() , new wp.media.controller.EditImage() ]
            });

            this._frame.on( 'toolbar:create:featured-image', function( toolbar ) {
                /**
                 * @this wp.media.view.MediaFrame.Select
                 */
                this.createSelectToolbar( toolbar, {
                    text: wp.media.view.l10n.setFeaturedImage
                });
            }, this._frame );

            this._frame.on( 'content:render:edit-image', function() {
                var selection = this.state('featured-image').get('selection'),
                    view = new wp.media.view.EditImage( { model: selection.single(), controller: this } ).render();

                this.content.set( view );

                // after bringing in the frame, load the actual editor via an ajax call
                view.loadEditor();

            }, this._frame );

            this._frame.state('featured-image').on( 'select', this.select );
            return this._frame;
        },
        /**
         * 'select' callback for Featured Image workflow, triggered when
         *  the 'Set Featured Image' button is clicked in the media modal.
         *
         * @this wp.media.controller.FeaturedImage
         */
        select: function() {
            var selection = this.get('selection').single();

            if ( ! wp.media.view.settings.post.featuredImageId ) {
                return;
            }

            wp.media.featuredImage.set( selection ? selection.id : -1 );
        },
        /**
         * Open the content media manager to the 'featured image' tab when
         * the post thumbnail is clicked.
         *
         * Update the featured image id when the 'remove' link is clicked.
         */
        init: function() {
            $('#postimagediv').on( 'click', '#set-post-thumbnail', function( event ) {
                event.preventDefault();
                // Stop propagation to prevent thickbox from activating.
                event.stopPropagation();

                wp.media.featuredImage.frame().open();
            }).on( 'click', '#remove-post-thumbnail', function() {
                wp.media.featuredImage.remove();
                return false;
            });
        }
    };

    $( wp.media.featuredImage.init );

    /** @namespace wp.media.editor */
    wp.media.editor = {
        /**
         * Send content to the editor
         *
         * @param {string} html Content to send to the editor
         */
        insert: function( html ) {
            var editor, wpActiveEditor,
                hasTinymce = ! _.isUndefined( window.tinymce ),
                hasQuicktags = ! _.isUndefined( window.QTags );

            if ( this.activeEditor ) {
                wpActiveEditor = window.wpActiveEditor = this.activeEditor;
            } else {
                wpActiveEditor = window.wpActiveEditor;
            }

            // Delegate to the global `send_to_editor` if it exists.
            // This attempts to play nice with any themes/plugins that have
            // overridden the insert functionality.
            if ( window.send_to_editor ) {
                return window.send_to_editor.apply( this, arguments );
            }

            if ( ! wpActiveEditor ) {
                if ( hasTinymce && tinymce.activeEditor ) {
                    editor = tinymce.activeEditor;
                    wpActiveEditor = window.wpActiveEditor = editor.id;
                } else if ( ! hasQuicktags ) {
                    return false;
                }
            } else if ( hasTinymce ) {
                editor = tinymce.get( wpActiveEditor );
            }

            if ( editor && ! editor.isHidden() ) {
                editor.execCommand( 'mceInsertContent', false, html );
            } else if ( hasQuicktags ) {
                QTags.insertContent( html );
            } else {
                document.getElementById( wpActiveEditor ).value += html;
            }

            // If the old thickbox remove function exists, call it in case
            // a theme/plugin overloaded it.
            if ( window.tb_remove ) {
                try { window.tb_remove(); } catch( e ) {}
            }
        },

        /**
         * Setup 'workflow' and add to the 'workflows' cache. 'open' can
         *  subsequently be called upon it.
         *
         * @param {string} id A slug used to identify the workflow.
         * @param {Object} [options={}]
         *
         * @this wp.media.editor
         *
         * @returns {wp.media.view.MediaFrame.Select} A media workflow.
         */
        add: function( id, options ) {
            var workflow = this.get( id );

            // only add once: if exists return existing
            if ( workflow ) {
                return workflow;
            }

            workflow = workflows[ id ] = wp.media( _.defaults( options || {}, {
                frame:    'post',
                state:    'insert',
                title:    wp.media.view.l10n.addMedia,
                multiple: true
            } ) );

            workflow.on( 'insert', function( selection ) {
                var state = workflow.state();

                selection = selection || state.get('selection');

                if ( ! selection )
                    return;

                $.when.apply( $, selection.map( function( attachment ) {
                    var display = state.display( attachment ).toJSON();
                    /**
                     * @this wp.media.editor
                     */
                    return this.send.attachment( display, attachment.toJSON() );
                }, this ) ).done( function() {
                    wp.media.editor.insert( _.toArray( arguments ).join('\n\n') );
                });
            }, this );

            workflow.state('gallery-edit').on( 'update', function( selection ) {
                /**
                 * @this wp.media.editor
                 */
                this.insert( wp.media.gallery.shortcode( selection ).string() );
            }, this );

            workflow.state('playlist-edit').on( 'update', function( selection ) {
                /**
                 * @this wp.media.editor
                 */
                this.insert( wp.media.playlist.shortcode( selection ).string() );
            }, this );

            workflow.state('video-playlist-edit').on( 'update', function( selection ) {
                /**
                 * @this wp.media.editor
                 */
                this.insert( wp.media.playlist.shortcode( selection ).string() );
            }, this );

            workflow.state('embed').on( 'select', function() {
                /**
                 * @this wp.media.editor
                 */
                var state = workflow.state(),
                    type = state.get('type'),
                    embed = state.props.toJSON();

                embed.url = embed.url || '';

                if ( 'link' === type ) {
                    _.defaults( embed, {
                        linkText: embed.url,
                        linkUrl: embed.url
                    });

                    this.send.link( embed ).done( function( resp ) {
                        wp.media.editor.insert( resp );
                    });

                } else if ( 'image' === type ) {
                    _.defaults( embed, {
                        title:   embed.url,
                        linkUrl: '',
                        align:   'none',
                        link:    'none'
                    });

                    if ( 'none' === embed.link ) {
                        embed.linkUrl = '';
                    } else if ( 'file' === embed.link ) {
                        embed.linkUrl = embed.url;
                    }

                    this.insert( wp.media.string.image( embed ) );
                }
            }, this );

            workflow.state('featured-image').on( 'select', wp.media.featuredImage.select );
            workflow.setState( workflow.options.state );
            return workflow;
        },
        /**
         * Determines the proper current workflow id
         *
         * @param {string} [id=''] A slug used to identify the workflow.
         *
         * @returns {wpActiveEditor|string|tinymce.activeEditor.id}
         */
        id: function( id ) {
            if ( id ) {
                return id;
            }

            // If an empty `id` is provided, default to `wpActiveEditor`.
            id = window.wpActiveEditor;

            // If that doesn't work, fall back to `tinymce.activeEditor.id`.
            if ( ! id && ! _.isUndefined( window.tinymce ) && tinymce.activeEditor ) {
                id = tinymce.activeEditor.id;
            }

            // Last but not least, fall back to the empty string.
            id = id || '';
            return id;
        },
        /**
         * Return the workflow specified by id
         *
         * @param {string} id A slug used to identify the workflow.
         *
         * @this wp.media.editor
         *
         * @returns {wp.media.view.MediaFrame} A media workflow.
         */
        get: function( id ) {
            id = this.id( id );
            return workflows[ id ];
        },
        /**
         * Remove the workflow represented by id from the workflow cache
         *
         * @param {string} id A slug used to identify the workflow.
         *
         * @this wp.media.editor
         */
        remove: function( id ) {
            id = this.id( id );
            delete workflows[ id ];
        },
        /** @namespace wp.media.editor.send */
        send: {
            /**
             * Called when sending an attachment to the editor
             *   from the medial modal.
             *
             * @param {Object} props Attachment details (align, link, size, etc).
             * @param {Object} attachment The attachment object, media version of Post.
             * @returns {Promise}
             */
            attachment: function( props, attachment ) {
                var caption = attachment.caption,
                    options, html;

                // If captions are disabled, clear the caption.
                if ( ! wp.media.view.settings.captions ) {
                    delete attachment.caption;
                }

                props = wp.media.string.props( props, attachment );

                options = {
                    id:           attachment.id,
                    post_content: attachment.description,
                    post_excerpt: caption
                };

                if ( props.linkUrl ) {
                    options.url = props.linkUrl;
                }

                if ( 'image' === attachment.type ) {
                    html = wp.media.string.image( props );

                    _.each({
                        align: 'align',
                        size:  'image-size',
                        alt:   'image_alt'
                    }, function( option, prop ) {
                        if ( props[ prop ] )
                            options[ option ] = props[ prop ];
                    });
                } else if ( 'video' === attachment.type ) {
                    html = wp.media.string.video( props, attachment );
                } else if ( 'audio' === attachment.type ) {
                    html = wp.media.string.audio( props, attachment );
                } else {
                    html = wp.media.string.link( props );
                    options.post_title = props.title;
                }

                return wp.media.post( 'send-attachment-to-editor', {
                    nonce:      wp.media.view.settings.nonce.sendToEditor,
                    attachment: options,
                    html:       html,
                    post_id:    wp.media.view.settings.post.id
                });
            },
            /**
             * Called when 'Insert From URL' source is not an image. Example: YouTube url.
             *
             * @param {Object} embed
             * @returns {Promise}
             */
            link: function( embed ) {
                return wp.media.post( 'send-link-to-editor', {
                    nonce:     wp.media.view.settings.nonce.sendToEditor,
                    src:       embed.linkUrl,
                    link_text: embed.linkText,
                    html:      wp.media.string.link( embed ),
                    post_id:   wp.media.view.settings.post.id
                });
            }
        },
        /**
         * Open a workflow
         *
         * @param {string} [id=undefined] Optional. A slug used to identify the workflow.
         * @param {Object} [options={}]
         *
         * @this wp.media.editor
         *
         * @returns {wp.media.view.MediaFrame}
         */
        open: function( id, options ) {
            var workflow;

            options = options || {};

            id = this.id( id );
            this.activeEditor = id;

            workflow = this.get( id );

            // Redo workflow if state has changed
            if ( ! workflow || ( workflow.options && options.state !== workflow.options.state ) ) {
                workflow = this.add( id, options );
            }

            wp.media.frame = workflow;

            return workflow.open();
        },

        /**
         * Bind click event for .insert-media using event delegation
         */
        init: function() {
            $(document.body)
                .on( 'click.add-media-button', '.insert-media', function( event ) {
                    var elem = $( event.currentTarget ),
                        editor = elem.data('editor'),
                        options = {
                            frame:    'post',
                            state:    'insert',
                            title:    wp.media.view.l10n.addMedia,
                            multiple: true
                        };

                    event.preventDefault();

                    if ( elem.hasClass( 'gallery' ) ) {
                        options.state = 'gallery';
                        options.title = wp.media.view.l10n.createGalleryTitle;
                    }

                    wp.media.editor.open( editor, options );
                });

            // Initialize and render the Editor drag-and-drop uploader.
            new wp.media.view.EditorUploader().render();
        }
    };

    _.bindAll( wp.media.editor, 'open' );
    $( wp.media.editor.init );
}(jQuery, _));