Demo/bin/Debug/front_end/components/ExecutionContextSelector.js

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// 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
 * @implements {WebInspector.TargetManager.Observer}
 * @param {!WebInspector.TargetManager} targetManager
 * @param {!WebInspector.Context} context
 */
WebInspector.ExecutionContextSelector = function(targetManager, context)
{
    targetManager.observeTargets(this);
    context.addFlavorChangeListener(WebInspector.ExecutionContext, this._executionContextChanged, this);
    context.addFlavorChangeListener(WebInspector.Target, this._targetChanged, this);

    targetManager.addModelListener(WebInspector.RuntimeModel, WebInspector.RuntimeModel.Events.ExecutionContextCreated, this._onExecutionContextCreated, this);
    targetManager.addModelListener(WebInspector.RuntimeModel, WebInspector.RuntimeModel.Events.ExecutionContextDestroyed, this._onExecutionContextDestroyed, this);
    this._targetManager = targetManager;
    this._context = context;
}

WebInspector.ExecutionContextSelector.prototype = {

    /**
     * @override
     * @param {!WebInspector.Target} target
     */
    targetAdded: function(target)
    {
        if (!target.hasJSContext())
            return;
        // Defer selecting default target since we need all clients to get their
        // targetAdded notifications first.
        setImmediate(deferred.bind(this));

        /**
         * @this {WebInspector.ExecutionContextSelector}
         */
        function deferred()
        {
            // We always want the second context for the service worker targets.
            if (!this._context.flavor(WebInspector.Target))
                this._context.setFlavor(WebInspector.Target, target);
        }
    },

    /**
     * @override
     * @param {!WebInspector.Target} target
     */
    targetRemoved: function(target)
    {
        if (!target.hasJSContext())
            return;
        var currentExecutionContext = this._context.flavor(WebInspector.ExecutionContext);
        if (currentExecutionContext && currentExecutionContext.target() === target)
            this._currentExecutionContextGone();

        var targets = this._targetManager.targetsWithJSContext();