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/*! * VisualEditor ContentEditable View class. * * @copyright See AUTHORS.txt */ /** * Generic base class for CE views. * * @abstract * @extends OO.ui.Element * @mixes OO.EventEmitter * * @constructor * @param {ve.dm.Model} model Model to observe * @param {Object} [config] Configuration options */ ve.ce.View = function VeCeView( model, config ) { // Setting this property before calling the parent constructor allows overridden #getTagName // methods in view classes to have access to the model when they are called for the first time // inside of OO.ui.Element this.model = model; // Parent constructor ve.ce.View.super.call( this, config ); // Mixin constructors OO.EventEmitter.call( this ); // Properties this.live = false; // Events this.connect( this, { setup: 'onSetup', teardown: 'onTeardown' } ); // Initialize this.initialize(); }; /* Inheritance */ OO.inheritClass( ve.ce.View, OO.ui.Element ); OO.mixinClass( ve.ce.View, OO.EventEmitter ); /* Events */ /** * @event ve.ce.View#setup */ /** * @event ve.ce.View#teardown */ /* Static members */ /** * Allowed attributes for DOM elements, in the same format as ve.dm.Model#preserveHtmlAttributes * * This list includes attributes that are generally safe to include in HTML loaded from a * foreign source and displaying it inside the browser. It doesn't include any event attributes, * for instance, which would allow arbitrary JavaScript execution. This alone is not enough to * make HTML safe to display, but it helps. * * TODO: Rather than use a single global list, set these on a per-view basis to something that makes * sense for that view in particular. * * @static * @property {boolean|Function} * @param {string} attribute * @return {boolean} Attibute is allowed * @inheritable */ ve.ce.View.static.renderHtmlAttributes = function ( attribute ) { const attributes = [ 'abbr', 'about', 'align', 'alt', 'axis', 'bgcolor', 'border', 'cellpadding', 'cellspacing', 'char', 'charoff', 'cite', 'class', 'clear', 'color', 'colspan', 'datatype', 'datetime', 'dir', 'face', 'frame', 'headers', 'height', 'href', 'id', 'itemid', 'itemprop', 'itemref', 'itemscope', 'itemtype', 'lang', 'noshade', 'nowrap', 'property', 'rbspan', 'rel', 'resource', 'rev', 'rowspan', 'rules', 'scope', 'size', 'span', 'src', 'start', 'style', 'summary', 'title', 'type', 'typeof', 'valign', 'value', 'width' ]; return attributes.indexOf( attribute ) !== -1; }; /* Methods */ /** * Get an HTML document from the model, to use for URL resolution. * * The default implementation returns null; subclasses should override this if they can provide * a resolution document. * * @see #getResolvedAttribute * @return {HTMLDocument|null} HTML document to use for resolution, or null if not available */ ve.ce.View.prototype.getModelHtmlDocument = function () { return null; }; /** * Initialize this.$element. This is called by the constructor and should be called every time * this.$element is replaced. */ ve.ce.View.prototype.initialize = function () { if ( this.model.element && this.model.element.originalDomElementsHash !== undefined ) { // Render attributes from original DOM elements ve.dm.Converter.static.renderHtmlAttributeList( this.model.getOriginalDomElements( this.model.getStore() ), this.$element, this.constructor.static.renderHtmlAttributes, // Computed true, // Deep !( this.model instanceof ve.dm.Node ) || !this.model.canHaveChildren() || this.model.handlesOwnChildren() ); } }; /** * Handle setup event. */ ve.ce.View.prototype.onSetup = function () { this.$element.data( 'view', this ); }; /** * Handle teardown event. */ ve.ce.View.prototype.onTeardown = function () { this.$element.removeData( 'view' ); }; /** * Get the model the view observes. * * @return {ve.dm.Model} Model the view observes */ ve.ce.View.prototype.getModel = function () { return this.model; }; /** * Check if the view is attached to the live DOM. * * @return {boolean} View is attached to the live DOM */ ve.ce.View.prototype.isLive = function () { return this.live; }; /** * Set live state. * * @param {boolean} live The view has been attached to the live DOM (use false on detach) * @fires ve.ce.View#setup * @fires ve.ce.View#teardown */ ve.ce.View.prototype.setLive = function ( live ) { this.live = live; if ( this.live ) { this.emit( 'setup' ); } else { this.emit( 'teardown' ); } }; /** * Get a resolved URL from a model attribute. * * @param {string} key Attribute name whose value is a URL * @return {string} URL resolved according to the document's base */ ve.ce.View.prototype.getResolvedAttribute = function ( key ) { const plainValue = this.model.getAttribute( key ), doc = this.getModelHtmlDocument(); return doc && typeof plainValue === 'string' ? ve.resolveUrl( plainValue, doc ) : plainValue; }; /** * Release all memory. */ ve.ce.View.prototype.destroy = function () { this.disconnect( this ); this.model.disconnect( this ); this.model = null; };
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