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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
* @extends {WebInspector.Object}
* @param {!Window} window
* @param {!InspectorFrontendHostAPI} frontendHost
*/
WebInspector.ZoomManager = function(window, frontendHost)
{
this._frontendHost = frontendHost;
this._zoomFactor = this._frontendHost.zoomFactor();
window.addEventListener("resize", this._onWindowResize.bind(this), true);
};
WebInspector.ZoomManager.Events = {
ZoomChanged: "ZoomChanged"
};
WebInspector.ZoomManager.prototype = {
/**
* @return {number}
*/
zoomFactor: function()
{
return this._zoomFactor;
},
/**
* @param {number} value
* @return {number}
*/
cssToDIP: function(value)
{
return value * this._zoomFactor;
},
/**
* @param {number} valueDIP
* @return {number}
*/
dipToCSS: function(valueDIP)
{
return valueDIP / this._zoomFactor;
},
_onWindowResize: function()
{
var oldZoomFactor = this._zoomFactor;
this._zoomFactor = this._frontendHost.zoomFactor();
if (oldZoomFactor !== this._zoomFactor)
this.dispatchEventToListeners(WebInspector.ZoomManager.Events.ZoomChanged, {from: oldZoomFactor, to: this._zoomFactor});
},
__proto__: WebInspector.Object.prototype
};
/**
* @type {!WebInspector.ZoomManager}
*/
WebInspector.zoomManager;
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