[DevTools] Introduce EmulationModel which will encapsulate emulation

third_party/WebKit/Source/devtools/front_end/emulation/DeviceOrientation.js

-// Copyright 2016 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
- */
-Emulation.DeviceOrientation = class {
-  /**
-   * @param {number} alpha
-   * @param {number} beta
-   * @param {number} gamma
-   */
-  constructor(alpha, beta, gamma) {
-    this.alpha = alpha;
-    this.beta = beta;
-    this.gamma = gamma;
-  }
-
-  /**
-   * @return {!Emulation.DeviceOrientation}
-   */
-  static parseSetting(value) {
-    if (value) {
-      var jsonObject = JSON.parse(value);
-      return new Emulation.DeviceOrientation(jsonObject.alpha, jsonObject.beta, jsonObject.gamma);
-    }
-    return new Emulation.DeviceOrientation(0, 0, 0);
-  }
-
-  /**
-   * @return {?Emulation.DeviceOrientation}
-   */
-  static parseUserInput(alphaString, betaString, gammaString) {
-    if (!alphaString && !betaString && !gammaString)
-      return null;
-
-    var isAlphaValid = Emulation.DeviceOrientation.validator(alphaString);
-    var isBetaValid = Emulation.DeviceOrientation.validator(betaString);
-    var isGammaValid = Emulation.DeviceOrientation.validator(gammaString);
-
-    if (!isAlphaValid && !isBetaValid && !isGammaValid)
-      return null;
-
-    var alpha = isAlphaValid ? parseFloat(alphaString) : -1;
-    var beta = isBetaValid ? parseFloat(betaString) : -1;
-    var gamma = isGammaValid ? parseFloat(gammaString) : -1;
-
-    return new Emulation.DeviceOrientation(alpha, beta, gamma);
-  }
-
-  /**
-   * @param {string} value
-   * @return {boolean}
-   */
-  static validator(value) {
-    return /^([+-]?[\d]+(\.\d+)?|[+-]?\.\d+)$/.test(value);
-  }
-
-  /**
-   * @return {string}
-   */
-  toSetting() {
-    return JSON.stringify(this);
-  }
-
-  apply() {
-    for (var target of SDK.targetManager.targets(SDK.Target.Capability.Browser))
-      target.deviceOrientationAgent().setDeviceOrientationOverride(this.alpha, this.beta, this.gamma);
-  }
-
-  clear() {
-    for (var target of SDK.targetManager.targets(SDK.Target.Capability.Browser))
-      target.deviceOrientationAgent().clearDeviceOrientationOverride();
-  }
-};