Demo/bin/Debug/front_end/ui/Context.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
 */
WebInspector.Context = function()
{
    this._flavors = new Map();
    this._eventDispatchers = new Map();
}

/**
 * @enum {string}
 */
WebInspector.Context.Events = {
    FlavorChanged: "FlavorChanged"
}

WebInspector.Context.prototype = {
    /**
     * @param {function(new:T, ...)} flavorType
     * @param {?T} flavorValue
     * @template T
     */
    setFlavor: function(flavorType, flavorValue)
    {
        var value = this._flavors.get(flavorType) || null;
        if (value === flavorValue)
            return;
        if (flavorValue)
            this._flavors.set(flavorType, flavorValue);
        else
            this._flavors.remove(flavorType);

        this._dispatchFlavorChange(flavorType, flavorValue);
    },

    /**
     * @param {function(new:T, ...)} flavorType
     * @param {?T} flavorValue
     * @template T
     */
    _dispatchFlavorChange: function(flavorType, flavorValue)
    {
        var dispatcher = this._eventDispatchers.get(flavorType);
        if (!dispatcher)
            return;
        dispatcher.dispatchEventToListeners(WebInspector.Context.Events.FlavorChanged, flavorValue);
    },

    /**
     * @param {function(new:Object, ...)} flavorType
     * @param {function(!WebInspector.Event)} listener
     * @param {!Object=} thisObject
     */
    addFlavorChangeListener: function(flavorType, listener, thisObject)
    {
        var dispatcher = this._eventDispatchers.get(flavorType);