import defined from '../../Core/defined.js';
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import destroyObject from '../../Core/destroyObject.js';
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import DeveloperError from '../../Core/DeveloperError.js';
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import knockout from '../../ThirdParty/knockout.js';
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import getElement from '../getElement.js';
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import PerformanceWatchdogViewModel from './PerformanceWatchdogViewModel.js';
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/**
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* Monitors performance of the application and displays a message if poor performance is detected.
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*
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* @alias PerformanceWatchdog
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* @constructor
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*
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* @param {Object} [options] Object with the following properties:
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* @param {Element|String} options.container The DOM element or ID that will contain the widget.
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* @param {Scene} options.scene The {@link Scene} for which to monitor performance.
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* @param {String} [options.lowFrameRateMessage='This application appears to be performing poorly on your system. Please try using a different web browser or updating your video drivers.'] The
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* message to display when a low frame rate is detected. The message is interpeted as HTML, so make sure
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* it comes from a trusted source so that your application is not vulnerable to cross-site scripting attacks.
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*/
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function PerformanceWatchdog(options) {
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//>>includeStart('debug', pragmas.debug);
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if (!defined(options) || !defined(options.container)) {
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throw new DeveloperError('options.container is required.');
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}
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if (!defined(options.scene)) {
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throw new DeveloperError('options.scene is required.');
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}
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//>>includeEnd('debug');
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var container = getElement(options.container);
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var viewModel = new PerformanceWatchdogViewModel(options);
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var element = document.createElement('div');
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element.className = 'cesium-performance-watchdog-message-area';
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element.setAttribute('data-bind', 'visible: showingLowFrameRateMessage');
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var dismissButton = document.createElement('button');
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dismissButton.setAttribute('type', 'button');
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dismissButton.className = 'cesium-performance-watchdog-message-dismiss';
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dismissButton.innerHTML = '×';
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dismissButton.setAttribute('data-bind', 'click: dismissMessage');
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element.appendChild(dismissButton);
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var message = document.createElement('div');
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message.className = 'cesium-performance-watchdog-message';
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message.setAttribute('data-bind', 'html: lowFrameRateMessage');
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element.appendChild(message);
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container.appendChild(element);
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knockout.applyBindings(viewModel, element);
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this._container = container;
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this._viewModel = viewModel;
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this._element = element;
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}
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Object.defineProperties(PerformanceWatchdog.prototype, {
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/**
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* Gets the parent container.
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* @memberof PerformanceWatchdog.prototype
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*
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* @type {Element}
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*/
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container : {
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get : function() {
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return this._container;
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}
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},
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/**
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* Gets the view model.
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* @memberof PerformanceWatchdog.prototype
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*
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* @type {PerformanceWatchdogViewModel}
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*/
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viewModel : {
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get : function() {
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return this._viewModel;
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}
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}
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});
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/**
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* @memberof PerformanceWatchdog
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* @returns {Boolean} true if the object has been destroyed, false otherwise.
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*/
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PerformanceWatchdog.prototype.isDestroyed = function() {
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return false;
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};
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/**
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* Destroys the widget. Should be called if permanently
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* removing the widget from layout.
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* @memberof PerformanceWatchdog
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*/
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PerformanceWatchdog.prototype.destroy = function() {
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this._viewModel.destroy();
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knockout.cleanNode(this._element);
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this._container.removeChild(this._element);
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return destroyObject(this);
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};
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export default PerformanceWatchdog;
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