1 files changed, 100 insertions, 0 deletions
diff --git a/devtools/client/performance/panel.js b/devtools/client/performance/panel.js
new file mode 100644
index 000000000..6fa9f37cf
--- /dev/null
+++ b/devtools/client/performance/panel.js
@@ -0,0 +1,100 @@
+/* -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const { Task } = require("devtools/shared/task");
+
+loader.lazyRequireGetter(this, "promise");
+loader.lazyRequireGetter(this, "EventEmitter",
+  "devtools/shared/event-emitter");
+
+function PerformancePanel(iframeWindow, toolbox) {
+  this.panelWin = iframeWindow;
+  this.toolbox = toolbox;
+
+  EventEmitter.decorate(this);
+}
+
+exports.PerformancePanel = PerformancePanel;
+
+PerformancePanel.prototype = {
+  /**
+   * Open is effectively an asynchronous constructor.
+   *
+   * @return object
+   *         A promise that is resolved when the Performance tool
+   *         completes opening.
+   */
+  open: Task.async(function* () {
+    if (this._opening) {
+      return this._opening;
+    }
+    let deferred = promise.defer();
+    this._opening = deferred.promise;
+
+    this.panelWin.gToolbox = this.toolbox;
+    this.panelWin.gTarget = this.target;
+    this._checkRecordingStatus = this._checkRecordingStatus.bind(this);
+
+    // Actor is already created in the toolbox; reuse
+    // the same front, and the toolbox will also initialize the front,
+    // but redo it here so we can hook into the same event to prevent race conditions
+    // in the case of the front still being in the process of opening.
+    let front = yield this.panelWin.gToolbox.initPerformance();
+
+    // This should only happen if this is completely unsupported (when profiler
+    // does not exist), and in that case, the tool shouldn't be available,
+    // so let's ensure this assertion.
+    if (!front) {
+      console.error("No PerformanceFront found in toolbox.");
+    }
+
+    this.panelWin.gFront = front;
+    let { PerformanceController, EVENTS } = this.panelWin;
+    PerformanceController.on(EVENTS.RECORDING_ADDED, this._checkRecordingStatus);
+    PerformanceController.on(EVENTS.RECORDING_STATE_CHANGE, this._checkRecordingStatus);
+    yield this.panelWin.startupPerformance();
+
+    // Fire this once incase we have an in-progress recording (console profile)
+    // that caused this start up, and no state change yet, so we can highlight the
+    // tab if we need.
+    this._checkRecordingStatus();
+
+    this.isReady = true;
+    this.emit("ready");
+
+    deferred.resolve(this);
+    return this._opening;
+  }),
+
+  // DevToolPanel API
+
+  get target() {
+    return this.toolbox.target;
+  },
+
+  destroy: Task.async(function* () {
+    // Make sure this panel is not already destroyed.
+    if (this._destroyed) {
+      return;
+    }
+
+    let { PerformanceController, EVENTS } = this.panelWin;
+    PerformanceController.off(EVENTS.RECORDING_ADDED, this._checkRecordingStatus);
+    PerformanceController.off(EVENTS.RECORDING_STATE_CHANGE, this._checkRecordingStatus);
+    yield this.panelWin.shutdownPerformance();
+    this.emit("destroyed");
+    this._destroyed = true;
+  }),
+
+  _checkRecordingStatus: function () {
+    if (this.panelWin.PerformanceController.isRecording()) {
+      this.toolbox.highlightTool("performance");
+    } else {
+      this.toolbox.unhighlightTool("performance");
+    }
+  }
+};