/**

 * WordPress View plugin.

 */

( function( tinymce ) {

	tinymce.PluginManager.add( 'wpview', function( editor ) {

		function noop () {}

		// Set this here as wp-tinymce.js may be loaded too early.

		var wp = window.wp;

		if ( ! wp || ! wp.mce || ! wp.mce.views ) {

			return {

				getView: noop

			};

		}

		// Check if a node is a view or not.

		function isView( node ) {

			return editor.dom.hasClass( node, 'wpview' );

		}

		// Replace view tags with their text.

		function resetViews( content ) {

			function callback( match, $1 ) {

				return '<p>' + window.decodeURIComponent( $1 ) + '</p>';

			}

			if ( ! content || content.indexOf( ' data-wpview-' ) === -1 ) {

				return content;

			}

			return content

				.replace( /<div[^>]+data-wpview-text="([^"]+)"[^>]*>(?:\.|[\s\S]+?wpview-end[^>]+>\s*<\/span>\s*)?<\/div>/g, callback )

				.replace( /<p[^>]+data-wpview-marker="([^"]+)"[^>]*>[\s\S]*?<\/p>/g, callback );

		}

		editor.on( 'init', function() {

			var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;

			if ( MutationObserver ) {

				new MutationObserver( function() {

					editor.fire( 'wp-body-class-change' );

				} )

				.observe( editor.getBody(), {

					attributes: true,

					attributeFilter: ['class']

				} );

			}

			// Pass on body class name changes from the editor to the wpView iframes.

			editor.on( 'wp-body-class-change', function() {

				var className = editor.getBody().className;

				editor.$( 'iframe[class="wpview-sandbox"]' ).each( function( i, iframe ) {

					// Make sure it is a local iframe.

					// jshint scripturl: true

					if ( ! iframe.src || iframe.src === 'javascript:""' ) {

						try {

							iframe.contentWindow.document.body.className = className;

						} catch( er ) {}

					}

				});

			} );

		});

		// Scan new content for matching view patterns and replace them with markers.

		editor.on( 'beforesetcontent', function( event ) {

			var node;

			if ( ! event.selection ) {

				wp.mce.views.unbind();

			}

			if ( ! event.content ) {

				return;

			}

			if ( ! event.load ) {

				node = editor.selection.getNode();

				if ( node && node !== editor.getBody() && /^\s*https?:\/\/\S+\s*$/i.test( event.content ) ) {

					// When a url is pasted or inserted, only try to embed it when it is in an empty paragraph.

					node = editor.dom.getParent( node, 'p' );

					if ( node && /^[\s\uFEFF\u00A0]*$/.test( editor.$( node ).text() || '' ) ) {

						// Make sure there are no empty inline elements in the <p>.

						node.innerHTML = '';

					} else {

						return;

					}

				}

			}

			event.content = wp.mce.views.setMarkers( event.content, editor );

		} );

		// Replace any new markers nodes with views.

		editor.on( 'setcontent', function() {

			wp.mce.views.render();

		} );

		// Empty view nodes for easier processing.

		editor.on( 'preprocess hide', function( event ) {

			editor.$( 'div[data-wpview-text], p[data-wpview-marker]', event.node ).each( function( i, node ) {

				node.innerHTML = '.';

			} );

		}, true );

		// Replace views with their text.

		editor.on( 'postprocess', function( event ) {

			event.content = resetViews( event.content );

		} );

		// Prevent adding of undo levels when replacing wpview markers

		// or when there are changes only in the (non-editable) previews.

		editor.on( 'beforeaddundo', function( event ) {

			var lastContent;

			var newContent = event.level.content || ( event.level.fragments && event.level.fragments.join( '' ) );

			if ( ! event.lastLevel ) {

				lastContent = editor.startContent;

			} else {

				lastContent = event.lastLevel.content || ( event.lastLevel.fragments && event.lastLevel.fragments.join( '' ) );

			}

			if (

				! newContent ||

				! lastContent ||

				newContent.indexOf( ' data-wpview-' ) === -1 ||

				lastContent.indexOf( ' data-wpview-' ) === -1

			) {

				return;

			}

			if ( resetViews( lastContent ) === resetViews( newContent ) ) {

				event.preventDefault();

			}

		} );

		// Make sure views are copied as their text.

		editor.on( 'drop objectselected', function( event ) {

			if ( isView( event.targetClone ) ) {

				event.targetClone = editor.getDoc().createTextNode(

					window.decodeURIComponent( editor.dom.getAttrib( event.targetClone, 'data-wpview-text' ) )

				);

			}

		} );

		// Clean up URLs for easier processing.

		editor.on( 'pastepreprocess', function( event ) {

			var content = event.content;

			if ( content ) {

				content = tinymce.trim( content.replace( /<[^>]+>/g, '' ) );

				if ( /^https?:\/\/\S+$/i.test( content ) ) {

					event.content = content;

				}

			}

		} );

		// Show the view type in the element path.

		editor.on( 'resolvename', function( event ) {

			if ( isView( event.target ) ) {

				event.name = editor.dom.getAttrib( event.target, 'data-wpview-type' ) || 'object';

			}

		} );

		// See `media` plugin.

		editor.on( 'click keyup', function() {

			var node = editor.selection.getNode();

			if ( isView( node ) ) {

				if ( editor.dom.getAttrib( node, 'data-mce-selected' ) ) {

					node.setAttribute( 'data-mce-selected', '2' );

				}

			}

		} );

		editor.addButton( 'wp_view_edit', {

			tooltip: 'Edit|button', // '|button' is not displayed, only used for context.

			icon: 'dashicon dashicons-edit',

			onclick: function() {

				var node = editor.selection.getNode();

				if ( isView( node ) ) {

					wp.mce.views.edit( editor, node );

				}

			}

		} );

		editor.addButton( 'wp_view_remove', {

			tooltip: 'Remove',

			icon: 'dashicon dashicons-no',

			onclick: function() {

				editor.fire( 'cut' );

			}

		} );

		editor.once( 'preinit', function() {

			var toolbar;

			if ( editor.wp && editor.wp._createToolbar ) {

				toolbar = editor.wp._createToolbar( [

					'wp_view_edit',

					'wp_view_remove'

				] );

				editor.on( 'wptoolbar', function( event ) {

					if ( ! event.collapsed && isView( event.element ) ) {

						event.toolbar = toolbar;

					}

				} );

			}

		} );

		editor.wp = editor.wp || {};

		editor.wp.getView = noop;

		editor.wp.setViewCursor = noop;

		return {

			getView: noop

		};

	} );

} )( window.tinymce );