editor/js/frame.js

frame.js revision 15e7d5bd8a8fb4068cc8df277bb857b83a0891f5
   /**
    * Creates a wrapper around an iframe. It loads the content either from a local
    * file or from script and creates a local YUI instance bound to that new window and document.
    * @module editor
    * @submodule frame
    */
   /**
    * Creates a wrapper around an iframe. It loads the content either from a local
    * file or from script and creates a local YUI instance bound to that new window and document.
    * @class Frame
    * @for Frame
    * @extends Base
    * @constructor
    */

   var Frame = function() {
       Frame.superclass.constructor.apply(this, arguments);
   };

   Y.extend(Frame, Y.Base, {
       /**
       * @private
       * @property _ready
       * @description Internal reference set when the content is ready.
       * @type Boolean
       */
       _ready: null,
       /**
       * @private
       * @property _rendered
       * @description Internal reference set when render is called.
       * @type Boolean
       */
       _rendered: null,
       /**
       * @private
       * @property _iframe
       * @description Internal Node reference to the iFrame or the window
       * @type Node
       */
       _iframe: null,
       /**
       * @private
       * @property _instance
       * @description Internal reference to the YUI instance bound to the iFrame or window
       * @type YUI
       */
       _instance: null,
       /**
       * @private
       * @method _create
       * @description Create the iframe or Window and get references to the Document & Window
       * @return {Object} Hash table containing references to the new Document & Window
       */
       _create: function() {
           var win, doc, res;

           this._iframe = Y.Node.create(Frame.HTML);
           this._iframe.setStyle('visibility', 'hidden');
           this._iframe.set('src', this.get('src'));
           this.get('container').append(this._iframe);
           res = this._resolveWinDoc();
           win = res.win;
           doc = res.doc;

           return {
               win: win,
               doc: doc
           };
       },
       /**
       * @private
       * @method _resolveWinDoc
       * @description Resolves the document and window from an iframe or window instance
       * @param {Object} c The YUI Config to add the window and document to
       * @return {Object} Object hash of window and document references, if a YUI config was passed, it is returned.
       */
       _resolveWinDoc: function(c) {
           var config = (c) ? c : {};
           config.win = Y.Node.getDOMNode(this._iframe.get('contentWindow'));
           config.doc = Y.Node.getDOMNode(this._iframe.get('contentWindow.document'));
           if (!config.doc) {
               config.doc = Y.config.doc;
           }
           if (!config.win) {
               config.win = Y.config.win;
           }
           return config;
       },
       /**
       * @private
       * @method _onDomEvent
       * @description Generic handler for all DOM events fired by the iframe or window. This handler
       * takes the current EventFacade and augments it to fire on the Frame host. It adds two new properties
       * to the EventFacade called frameX and frameY which adds the scroll and xy position of the iframe
       * to the original pageX and pageY of the event so external nodes can be positioned over the frame.
       * @param {Event.Facade} e
       */
       _onDomEvent: function(e) {
           var xy = this._iframe.getXY(),
               node = this._instance.one('win');

           //Y.log('onDOMEvent: ' + e.type, 'info', 'frame');
           e.frameX = xy[0] + e.pageX - node.get('scrollLeft');
           e.frameY = xy[1] + e.pageY - node.get('scrollTop');

           e.frameTarget = e.target;
           e.frameCurrentTarget = e.currentTarget;
           e.frameEvent = e;

           //TODO: Not sure why this stopped working!!!
           this.publish(e.type, {
               emitFacade: true,
               stoppedFn: Y.bind(function(ev, domev) {
                   ev.halt();
               }, this, e),
               preventedFn: Y.bind(function(ev, domev) {
                   ev.preventDefault();
               }, this, e)
           });
           this.fire(e.type, e);
       },
       initializer: function() {
           this.publish('ready', {
               emitFacade: true,
               defaultFn: this._defReadyFn
           });
       },
       destructor: function() {
           var inst = this.getInstance();

           inst.one('doc').detachAll();
           inst = null;
           this._iframe.remove();
       },
       _DOMPaste: function(e) {
           var inst = this.getInstance(),
               data = '', win = inst.config.win;

           if (e._event.originalTarget) {
               data = e._event.originalTarget;
           }
           if (e._event.clipboardData) {
               data = e._event.clipboardData.getData('Text');
           }

           if (win.clipboardData) {
               data = win.clipboardData.getData('Text');
               if (data == '') { // Could be empty, or failed
                   // Verify failure
                   if (!win.clipboardData.setData('Text', data)) {
                       data = null;
                   }
               }
           }


           e.frameTarget = e.target;
           e.frameCurrentTarget = e.currentTarget;
           e.frameEvent = e;

           if (data) {
               e.clipboardData = {
                   data: data,
                   getData: function() {
                       return data;
                   }
               };
           } else {
               Y.log('Failed to collect clipboard data', 'warn', 'frame');
               e.clipboardData = null;
           }

           this.fire('paste', e);
       },
       /**
       * @private
       * @method _defReadyFn
       * @description Binds DOM events, sets the iframe to visible and fires the ready event
       */
       _defReadyFn: function() {
           var inst = this.getInstance(),
               fn = Y.bind(this._onDomEvent, this);

           inst.Node.DOM_EVENTS.paste = 1;

           Y.each(inst.Node.DOM_EVENTS, function(v, k) {
               if (v === 1) {
                   if (k !== 'focus' && k !== 'blur' && k !== 'paste') {
                       Y.log('Adding DOM event to frame: ' + k, 'info', 'frame');
                       inst.on(k, fn, inst.config.doc);
                   }
               }
           });

           inst.on('paste', Y.bind(this._DOMPaste, this), inst.one('body'));

           //Adding focus/blur to the window object
           inst.on('focus', fn, inst.config.win);
           inst.on('blur', fn, inst.config.win);
           inst._use = inst.use;
           inst.use = Y.bind(this.use, this);

           this._iframe.setStyles({
               visibility: 'inherit'
           });
           inst.one('body').setStyle('display', 'block');
       },
       /**
       * @private
       * @method _onContentReady
       * @description Called once the content is available in the frame/window and calls the final use call
       * on the internal instance so that the modules are loaded properly.
       */
       _onContentReady: function(e) {
           if (!this._ready) {
               this._ready = true;
               var inst = this.getInstance(),
                   args = Y.clone(this.get('use'));

               this.fire('contentready');

               Y.log('On available for body of iframe', 'info', 'frame');
               if (e) {
                   inst.config.doc = Y.Node.getDOMNode(e.target);
               }
               //TODO Circle around and deal with CSS loading...
               args.push(Y.bind(function() {
                   Y.log('Callback from final internal use call', 'info', 'frame');
                   this.fire('ready');
               }, this));
               Y.log('Calling use on internal instance: ', 'info', 'frame');
               inst.use.apply(inst, args);

               inst.one('doc').get('documentElement').addClass('yui-js-enabled');
           }
       },
       /**
       * @private
       * @method _resolveBaseHref
       * @description Resolves the basehref of the page the frame is created on. Only applies to dynamic content.
       * @param {String} href The new value to use, if empty it will be resolved from the current url.
       * @return {String}
       */
       _resolveBaseHref: function(href) {
           if (!href || href === '') {
               href = Y.config.doc.location.href;
               if (href.indexOf('?') !== -1) { //Remove the query string
                   href = href.substring(0, href.indexOf('?'));
               }
               href = href.substring(0, href.lastIndexOf('/')) + '/';
           }
           return href;
       },
       /**
       * @private
       * @method _getHTML
       * @description Get the content from the iframe
       * @param {String} html The raw HTML from the body of the iframe.
       * @return {String}
       */
       _getHTML: function(html) {
           if (this._ready) {
               var inst = this.getInstance();
               html = inst.one('body').get('innerHTML');
           }
           return html;
       },
       /**
       * @private
       * @method _setHTML
       * @description Set the content of the iframe
       * @param {String} html The raw HTML to set the body of the iframe to.
       * @return {String}
       */
       _setHTML: function(html) {
           if (this._ready) {
               var inst = this.getInstance();
               inst.one('body').set('innerHTML', html);
           } else {
               //This needs to be wrapped in a contentready callback for the !_ready state
               this.on('contentready', Y.bind(function(html, e) {
                   var inst = this.getInstance();
                   inst.one('body').set('innerHTML', html);
               }, this, html));
           }
           return html;
       },
       /**
       * @private
       * @method _setExtraCSS
       * @description Set's the extra CSS on the instance..
       */
       _setExtraCSS: function(css) {
           if (this._ready) {
               var inst = this.getInstance(),
                   node = inst.get('#extra_css');

               node.remove();
               inst.one('head').append('<style id="extra_css">' + css + '</style>');
           }
           return css;
       },
       /**
       * @private
       * @method _instanceLoaded
       * @description Called from the first YUI instance that sets up the internal instance.
       * This loads the content into the window/frame and attaches the contentready event.
       * @param {YUI} inst The internal YUI instance bound to the frame/window
       */
       _instanceLoaded: function(inst) {
           this._instance = inst;
           this._instance.on('contentready', Y.bind(this._onContentReady, this), 'body');

           var html = '',
               extra_css = ((this.get('extracss')) ? '<style id="extra_css">' + this.get('extracss') + '</style>' : ''),
               doc = this._instance.config.doc;

           Y.log('Creating the document from javascript', 'info', 'frame');
           html = Y.substitute(Frame.PAGE_HTML, {
               DIR: this.get('dir'),
               LANG: this.get('lang'),
               TITLE: this.get('title'),
               META: Frame.META,
               CONTENT: this.get('content'),
               BASE_HREF: this.get('basehref'),
               DEFAULT_CSS: Frame.DEFAULT_CSS,
               EXTRA_CSS: extra_css
           });
           if (Y.config.doc.compatMode != 'BackCompat') {
               Y.log('Adding Doctype to frame', 'info', 'frame');
               html = Frame.DOC_TYPE + "\n" + html;
           } else {
               Y.log('DocType skipped because we are in BackCompat Mode.', 'warn', 'frame');
           }

           Y.log('Injecting content into iframe', 'info', 'frame');
           doc.open();
           doc.write(html);
           doc.close();
           if (this.get('designMode')) {
               doc.designMode = 'on';
               if (!Y.UA.ie) {
                   this._instance.on('domready', function(e) {
                       try {
                           //Force other browsers into non CSS styling
                           doc.execCommand('styleWithCSS', false, false);
                           doc.execCommand('insertbronreturn', false, false);
                       } catch (err) {}
                   });
               }
           }
       },
       //BEGIN PUBLIC METHODS
       /**
       * @method use
       * @description This is a scoped version of the normal YUI.use method & is bound to this frame/window.
       * At setup, the inst.use method is mapped to this method.
       */
       use: function() {
           Y.log('Calling augmented use after ready', 'info', 'frame');
           var inst = this.getInstance(),
               args = Y.Array(arguments),
               cb = false;

           if (Y.Lang.isFunction(args[args.length - 1])) {
               cb = args.pop();
           }
           if (cb) {
               args.push(function() {
                   Y.log('Internal callback from augmented use', 'info', 'frame');
                   cb.apply(inst, arguments);

               });
           }
           inst._use.apply(inst, args);
       },
       /**
       * @method delegate
       * @description A delegate method passed to the instance's delegate method
       * @param {String} type The type of event to listen for
       * @param {Function} fn The method to attach
       * @param {String} cont The container to act as a delegate, if no "sel" passed, the body is assumed as the container.
       * @param {String} sel The selector to match in the event (optional)
       * @return {EventHandle} The Event handle returned from Y.delegate
       */
       delegate: function(type, fn, cont, sel) {
           var inst = this.getInstance();
           if (!inst) {
               Y.log('Delegate events can not be attached until after the ready event has fired.', 'error', 'iframe');
               return false;
           }
           if (!sel) {
               sel = cont;
               cont = 'body';
           }
           return inst.delegate(type, fn, cont, sel);
       },
       /**
       * @method getInstance
       * @description Get a reference to the internal YUI instance.
       * @return {YUI} The internal YUI instance
       */
       getInstance: function() {
           return this._instance;
       },
       /**
       * @method render
       * @description Render the iframe into the container config option or open the window.
       * @param {String/HTMLElement/Node} node The node to render to
       * @return {Y.Frame}
       * @chainable
       */
       render: function(node) {
           if (this._rendered) {
               Y.log('Frame already rendered.', 'warn', 'frame');
               return this;
           }
           this._rendered = true;
           if (node) {
               this.set('container', node);
           }
           var inst, timer,
               res = this._create(),
               cb = Y.bind(function(i) {
                   Y.log('Internal instance loaded with node', 'info', 'frame');
                   this._instanceLoaded(i);
               }, this),
               args = Y.clone(this.get('use')),
               config = {
                   debug: false,
                   bootstrap: false,
                   win: res.win,
                   doc: res.doc
               },
               fn = Y.bind(function() {
                   Y.log('New Modules Loaded into main instance', 'info', 'frame');
                   config = this._resolveWinDoc(config);
                   inst = YUI(config);
                   inst.log = Y.log; //Dump the instance logs to the parent instance.
                   Y.log('Creating new internal instance with node only', 'info', 'frame');
                   try {
                       inst.use('node-base', cb);
                       if (timer) {
                           clearInterval(timer);
                       }
                   } catch (e) {
                       timer = setInterval(function() {
                           Y.log('[TIMER] Internal use call failed, retrying', 'info', 'frame');
                           fn();
                       }, 350);
                       Y.log('Internal use call failed, retrying', 'info', 'frame');
                   }
               }, this);

           args.push(fn);

           Y.log('Adding new modules to main instance', 'info', 'frame');
           Y.use.apply(Y, args);
           return this;
       },
       /**
       * @method focus
       * @description Set the focus to the iframe
       * @param {Function} fn Callback function to execute after focus happens
       * @return {Frame}
       * @chainable
       */
       focus: function(fn) {
           if (Y.UA.ie || Y.UA.gecko) {
               this.getInstance().one('win').focus();
               if (fn) {
                   fn();
               }
           } else {
               try {
                   Y.one('win').focus();
                   Y.later(100, this, function() {
                       this.getInstance().one('win').focus();
                       if (fn) {
                           fn();
                       }
                   });
               } catch (ferr) {
                   Y.log('Frame focus failed', 'warn', 'frame');
               }
           }
           return this;
       },
       /**
       * @method show
       * @description Show the iframe instance
       * @return {Frame}
       * @chainable
       */
       show: function() {
           this._iframe.setStyles({
               position: 'static',
               left: ''
           });
           if (Y.UA.gecko) {
               try {
                   this._instance.config.doc.designMode = 'on';
               } catch (e) { }
               this.focus();
           }
           return this;
       },
       /**
       * @method hide
       * @description Hide the iframe instance
       * @return {Frame}
       * @chainable
       */
       hide: function() {
           this._iframe.setStyles({
               position: 'absolute',
               left: '-999999px'
           });
           return this;
       }
   }, {

       DEFAULT_CSS: 'html { height: 95%; } body { padding: 7px; background-color: #fff; font: 13px/1.22 arial,helvetica,clean,sans-serif;*font-size:small;*font:x-small; } a, a:visited, a:hover { color: blue !important; text-decoration: underline !important; cursor: text !important; } img { cursor: pointer !important; border: none; }',

       //DEFAULT_CSS: 'html { } body { margin: -15px 0 0 -15px; padding: 7px 0 0 15px; display: block; background-color: #fff; font: 13px/1.22 arial,helvetica,clean,sans-serif;*font-size:small;*font:x-small; }',
       //DEFAULT_CSS: 'html { height: 95%; } body { height: 100%; padding: 7px; margin: 0 0 0 -7px; postion: relative; background-color: #fff; font: 13px/1.22 arial,helvetica,clean,sans-serif;*font-size:small;*font:x-small; } a, a:visited, a:hover { color: blue !important; text-decoration: underline !important; cursor: text !important; } img { cursor: pointer !important; border: none; }',
       //DEFAULT_CSS: 'html { margin: 0; padding: 0; border: none; border-size: 0; } body { height: 97%; margin: 0; padding: 0; display: block; background-color: gray; font: 13px/1.22 arial,helvetica,clean,sans-serif;*font-size:small;*font:x-small; }',
       /**
       * @static
       * @property HTML
       * @description The template string used to create the iframe
       * @type String
       */
       HTML: '<iframe border="0" frameBorder="0" marginWidth="0" marginHeight="0" leftMargin="0" topMargin="0" allowTransparency="true" width="100%" height="99%"></iframe>',
       //HTML: '<iframe border="0" frameBorder="0" width="100%" height="99%"></iframe>',
       /**
       * @static
       * @property PAGE_HTML
       * @description The template used to create the page when created dynamically.
       * @type String
       */
       PAGE_HTML: '<html dir="{DIR}" lang="{LANG}"><head><title>{TITLE}</title>{META}<base href="{BASE_HREF}"/><style id="editor_css">{DEFAULT_CSS}</style>{EXTRA_CSS}</head><body>{CONTENT}</body></html>',
       /**
       * @static
       * @property DOC_TYPE
       * @description The DOCTYPE to prepend to the new document when created. Should match the one on the page being served.
       * @type String
       */
       DOC_TYPE: '<!DOCTYPE HTML PUBLIC "-/'+'/W3C/'+'/DTD HTML 4.01/'+'/EN" "http:/'+'/www.w3.org/TR/html4/strict.dtd">',
       /**
       * @static
       * @property META
       * @description The meta-tag for Content-Type to add to the dynamic document
       * @type String
       */
       META: '<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7">',
       //META: '<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>',
       /**
       * @static
       * @property NAME
       * @description The name of the class (frame)
       * @type String
       */
       NAME: 'frame',
       ATTRS: {
           /**
           * @attribute title
           * @description The title to give the blank page.
           * @type String
           */
           title: {
               value: 'Blank Page'
           },
           /**
           * @attribute dir
           * @description The default text direction for this new frame. Default: ltr
           * @type String
           */
           dir: {
               value: 'ltr'
           },
           /**
           * @attribute lang
           * @description The default language. Default: en-US
           * @type String
           */
           lang: {
               value: 'en-US'
           },
           /**
           * @attribute src
           * @description The src of the iframe/window. Defaults to javascript:;
           * @type String
           */
           src: {
               //Hackish, IE needs the false in the Javascript URL
               value: 'javascript' + ((Y.UA.ie) ? ':false' : ':') + ';'
           },
           /**
           * @attribute designMode
           * @description Should designMode be turned on after creation.
           * @writeonce
           * @type Boolean
           */
           designMode: {
               writeOnce: true,
               value: false
           },
           /**
           * @attribute content
           * @description The string to inject into the body of the new frame/window.
           * @type String
           */
           content: {
               value: '<br>',
               setter: '_setHTML',
               getter: '_getHTML'
           },
           /**
           * @attribute basehref
           * @description The base href to use in the iframe.
           * @type String
           */
           basehref: {
               value: false,
               getter: '_resolveBaseHref'
           },
           /**
           * @attribute use
           * @description Array of modules to include in the scoped YUI instance at render time. Default: ['none', 'selector-css2']
           * @writeonce
           * @type Array
           */
           use: {
               writeOnce: true,
               value: ['substitute', 'node', 'node-style', 'selector-css3']
           },
           /**
           * @attribute container
           * @description The container to append the iFrame to on render.
           * @type String/HTMLElement/Node
           */
           container: {
               value: 'body',
               setter: function(n) {
                   return Y.one(n);
               }
           },
           /**
           * @attribute id
           * @description Set the id of the new Node. (optional)
           * @type String
           * @writeonce
           */
           id: {
               writeOnce: true,
               getter: function(id) {
                   if (!id) {
                       id = 'iframe-' + Y.guid();
                   }
                   return id;
               }
           },
           /**
           * @attribute extracss
           * @description A string of CSS to add to the Head of the Editor
           * @type String
           */
           extracss: {
               value: '',
               setter: '_setExtraCSS'
           },
           /**
           * @attribute host
           * @description A reference to the Editor instance
           * @type Object
           */
           host: {
               value: false
           }
       }
   });


   Y.Frame = Frame;