DevTools: Introduce ThreadsSidebar

Source/devtools/front_end/sources/ThreadsSidebarPane.js

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @constructor
+ * @extends {WebInspector.SidebarPane}
+ * @implements {WebInspector.TargetManager.Observer}
+ */
+WebInspector.ThreadsSidebarPane = function()
+{
+    WebInspector.SidebarPane.call(this, WebInspector.UIString("Threads"));
+    /** @type {!Map.<!WebInspector.Target, !WebInspector.Placard>} */
+    this._targetsToPlacards = new Map();
+    /** @type {?WebInspector.Placard} */
+    this._selectedPlacard = null;
+    WebInspector.targetManager.addModelListener(WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.DebuggerPaused, this._onDebuggerStateChanged, this);
+    WebInspector.targetManager.addModelListener(WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.DebuggerResumed, this._onDebuggerStateChanged, this);
+    WebInspector.context.addFlavorChangeListener(WebInspector.Target, this._targetChanged, this);
+    WebInspector.targetManager.observeTargets(this);
+}
+
+WebInspector.ThreadsSidebarPane.prototype = {
+
+    /**
+     * @param {!WebInspector.Target} target
+     */
+    targetAdded: function(target)
+    {
+        var placard = new WebInspector.Placard(target.name(), "");

[vsevik, 2014/08/08 08:32:03]

Let's use a URL that is trimmed relative to documentURL for worker threads as a
name.

[sergeyv, 2014/08/08 09:01:50]

Done.

+        placard.__target = target;

[vsevik, 2014/08/08 08:32:03]

Please use a Map instead.

[sergeyv, 2014/08/08 09:01:50]

Done.

+        placard.element.addEventListener("click", this._onPlacardClick.bind(this, placard), false);
+        var currentTarget = WebInspector.context.flavor(WebInspector.Target);
+        if (currentTarget === target)
+            this._selectPlacard(placard);
+
+        this._targetsToPlacards.put(target, placard);
+        this.bodyElement.appendChild(placard.element);
+        this._updateDebuggerState(target);
+    },
+
+    /**
+     * @param {!WebInspector.Target} target
+     */
+    targetRemoved: function(target)
+    {
+        var placard = this._targetsToPlacards.remove(target);
+        this.bodyElement.removeChild(placard.element);
+    },
+
+    /**
+     * @param {!WebInspector.Event} event
+     */
+    _targetChanged: function(event)
+    {
+        var newTarget = /** @type {?WebInspector.Target} */(event.data);
+        var placard =  /** @type {!WebInspector.Placard} */ (this._targetsToPlacards.get(newTarget));
+        this._selectPlacard(placard);
+    },
+
+    /**
+     * @param {!WebInspector.Event} event
+     */
+    _onDebuggerStateChanged: function(event)
+    {
+        var debuggerModel = /** @type {!WebInspector.DebuggerModel} */ (event.target);
+        this._updateDebuggerState(debuggerModel.target());
+    },
+
+    /**
+     * @param {!WebInspector.Target} target
+     */
+    _updateDebuggerState: function(target)
+    {
+        var placard = this._targetsToPlacards.get(target);
+        placard.subtitle = target.debuggerModel.isPaused() ? WebInspector.UIString("Paused") : WebInspector.UIString("Running");
+    },
+
+    /**
+     * @param {!WebInspector.Placard} placard
+     */
+    _selectPlacard: function(placard)
+    {
+        if (this._selectedPlacard)

[vsevik, 2014/08/08 08:32:03]

Let's add an early bailout in case the same placard is already selected.

[sergeyv, 2014/08/08 09:01:50]

Done.

+            this._selectedPlacard.selected = false;
+
+        this._selectedPlacard = placard;
+        placard.selected = true;
+    },
+
+    /**
+     * @param {!WebInspector.Placard} placard
+     */
+    _onPlacardClick: function(placard)
+    {
+        WebInspector.context.setFlavor(WebInspector.Target, placard.__target);
+        placard.element.scrollIntoViewIfNeeded();
+    },
+
+
+    __proto__: WebInspector.SidebarPane.prototype
+}