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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.
/**
* @unrestricted
*/
UI.ZoomManager = class extends Common.Object {
/**
* @param {!Window} window
* @param {!InspectorFrontendHostAPI} frontendHost
*/
constructor(window, frontendHost) {
super();
this._frontendHost = frontendHost;
this._zoomFactor = this._frontendHost.zoomFactor();
window.addEventListener('resize', this._onWindowResize.bind(this), true);
}
/**
* @return {number}
*/
zoomFactor() {
return this._zoomFactor;
}
/**
* @param {number} value
* @return {number}
*/
cssToDIP(value) {
return value * this._zoomFactor;
}
/**
* @param {number} valueDIP
* @return {number}
*/
dipToCSS(valueDIP) {
return valueDIP / this._zoomFactor;
}
_onWindowResize() {
var oldZoomFactor = this._zoomFactor;
this._zoomFactor = this._frontendHost.zoomFactor();
if (oldZoomFactor !== this._zoomFactor)
this.dispatchEventToListeners(UI.ZoomManager.Events.ZoomChanged, {from: oldZoomFactor, to: this._zoomFactor});
}
};
/** @enum {symbol} */
UI.ZoomManager.Events = {
ZoomChanged: Symbol('ZoomChanged')
};
/**
* @type {!UI.ZoomManager}
*/
UI.zoomManager;
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