michael@0: /* -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ft=javascript ts=2 et sw=2 tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: "use strict";
michael@0: 
michael@0: const { Cc, Ci, Cu, Cr } = require("chrome");
michael@0: const promise = Cu.import("resource://gre/modules/Promise.jsm", {}).Promise;
michael@0: const EventEmitter = require("devtools/toolkit/event-emitter");
michael@0: const { CanvasFront } = require("devtools/server/actors/canvas");
michael@0: const { DevToolsUtils } = Cu.import("resource://gre/modules/devtools/DevToolsUtils.jsm", {});
michael@0: 
michael@0: function CanvasDebuggerPanel(iframeWindow, toolbox) {
michael@0:   this.panelWin = iframeWindow;
michael@0:   this._toolbox = toolbox;
michael@0:   this._destroyer = null;
michael@0: 
michael@0:   EventEmitter.decorate(this);
michael@0: };
michael@0: 
michael@0: exports.CanvasDebuggerPanel = CanvasDebuggerPanel;
michael@0: 
michael@0: CanvasDebuggerPanel.prototype = {
michael@0:   /**
michael@0:    * Open is effectively an asynchronous constructor.
michael@0:    *
michael@0:    * @return object
michael@0:    *         A promise that is resolved when the Canvas Debugger completes opening.
michael@0:    */
michael@0:   open: function() {
michael@0:     let targetPromise;
michael@0: 
michael@0:     // Local debugging needs to make the target remote.
michael@0:     if (!this.target.isRemote) {
michael@0:       targetPromise = this.target.makeRemote();
michael@0:     } else {
michael@0:       targetPromise = promise.resolve(this.target);
michael@0:     }
michael@0: 
michael@0:     return targetPromise
michael@0:       .then(() => {
michael@0:         this.panelWin.gToolbox = this._toolbox;
michael@0:         this.panelWin.gTarget = this.target;
michael@0:         this.panelWin.gFront = new CanvasFront(this.target.client, this.target.form);
michael@0:         return this.panelWin.startupCanvasDebugger();
michael@0:       })
michael@0:       .then(() => {
michael@0:         this.isReady = true;
michael@0:         this.emit("ready");
michael@0:         return this;
michael@0:       })
michael@0:       .then(null, function onError(aReason) {
michael@0:         DevToolsUtils.reportException("CanvasDebuggerPanel.prototype.open", aReason);
michael@0:       });
michael@0:   },
michael@0: 
michael@0:   // DevToolPanel API
michael@0: 
michael@0:   get target() this._toolbox.target,
michael@0: 
michael@0:   destroy: function() {
michael@0:     // Make sure this panel is not already destroyed.
michael@0:     if (this._destroyer) {
michael@0:       return this._destroyer;
michael@0:     }
michael@0: 
michael@0:     return this._destroyer = this.panelWin.shutdownCanvasDebugger().then(() => {
michael@0:       this.emit("destroyed");
michael@0:     });
michael@0:   }
michael@0: };