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

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// Copyright 2015 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 {!Element} selectElement
 */
WebInspector.ExecutionContextModel = function(selectElement)
{
    this._selectElement = selectElement;
    /**
     * @type {!Map.<!WebInspector.ExecutionContext, !Element>}
     */
    this._optionByExecutionContext = new Map();

    WebInspector.targetManager.observeTargets(this);
    WebInspector.targetManager.addModelListener(WebInspector.RuntimeModel, WebInspector.RuntimeModel.Events.ExecutionContextCreated, this._onExecutionContextCreated, this);
    WebInspector.targetManager.addModelListener(WebInspector.RuntimeModel, WebInspector.RuntimeModel.Events.ExecutionContextDestroyed, this._onExecutionContextDestroyed, this);
    WebInspector.targetManager.addModelListener(WebInspector.ResourceTreeModel, WebInspector.ResourceTreeModel.EventTypes.FrameNavigated, this._onFrameNavigated, this);

    this._selectElement.addEventListener("change", this._executionContextChanged.bind(this), false);
    WebInspector.context.addFlavorChangeListener(WebInspector.ExecutionContext, this._executionContextChangedExternally, this);
}

WebInspector.ExecutionContextModel.prototype = {
    /**
     * @param {!WebInspector.ExecutionContext} executionContext
     * @return {string}
     */
    _titleFor: function(executionContext)
    {
        var result;
        if (executionContext.isMainWorldContext) {
            if (executionContext.frameId) {
                var frame = executionContext.target().resourceTreeModel.frameForId(executionContext.frameId);
                result =  frame ? frame.displayName() : (executionContext.origin || executionContext.name);
            } else {
                var parsedUrl = executionContext.origin.asParsedURL();
                var name = parsedUrl? parsedUrl.lastPathComponentWithFragment() : executionContext.name;
                result = executionContext.target().decorateLabel(name);
            }
        } else {
            result = "\u00a0\u00a0\u00a0\u00a0" + (executionContext.name || executionContext.origin);
        }

        var maxLength = 50;
        return result.trimMiddle(maxLength);
    },

    /**
     * @param {!WebInspector.ExecutionContext} executionContext
     */
    _executionContextCreated: function(executionContext)
    {
        // FIXME(413886): We never want to show execution context for the main thread of shadow page in service/shared worker frontend.
        // This check could be removed once we do not send this context to frontend.
        if (executionContext.target().isServiceWorker())
            return;