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Issue 2843763004: [DevTools] Introduce EmulationModel which will encapsulate emulation (Closed)
Patch Set: +throttling Created 3 years, 8 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 /**
5 * @implements {SDK.TargetManager.Observer}
6 * @unrestricted
7 */
8 Emulation.MultitargetTouchModel = class {
9 constructor() {
10 this._touchEnabled = false;
11 this._touchMobile = false;
12 this._customTouchEnabled = false;
13
14 SDK.targetManager.observeTargets(this, SDK.Target.Capability.TouchEmulation) ;
15 }
16
17 /**
18 * @return {!Emulation.MultitargetTouchModel}
19 */
20 static instance() {
21 if (!Emulation.MultitargetTouchModel._instance)
22 Emulation.MultitargetTouchModel._instance = new Emulation.MultitargetTouch Model();
23 return /** @type {!Emulation.MultitargetTouchModel} */ (Emulation.Multitarge tTouchModel._instance);
24 }
25
26 /**
27 * @param {boolean} enabled
28 * @param {boolean} mobile
29 */
30 setTouchEnabled(enabled, mobile) {
31 this._touchEnabled = enabled;
32 this._touchMobile = mobile;
33 this._updateAllTargets();
34 }
35
36 /**
37 * @param {boolean} enabled
38 */
39 setCustomTouchEnabled(enabled) {
40 this._customTouchEnabled = enabled;
41 this._updateAllTargets();
42 }
43
44 _updateAllTargets() {
45 for (var target of SDK.targetManager.targets(SDK.Target.Capability.TouchEmul ation))
46 this._applyToTarget(target);
47 }
48
49 /**
50 * @param {!SDK.Target} target
51 */
52 _applyToTarget(target) {
53 var current = {enabled: this._touchEnabled, configuration: this._touchMobile ? 'mobile' : 'desktop'};
54 if (this._customTouchEnabled)
55 current = {enabled: true, configuration: 'mobile'};
56
57 var overlayModel = target.model(SDK.OverlayModel);
58 var inspectModeEnabled = overlayModel ? overlayModel.inspectModeEnabled() : false;
59 if (inspectModeEnabled)
60 current = {enabled: false, configuration: 'mobile'};
61
62 /**
63 * @suppressGlobalPropertiesCheck
64 */
65 const injectedFunction = function() {
66 const touchEvents = ['ontouchstart', 'ontouchend', 'ontouchmove', 'ontouch cancel'];
67 var recepients = [window.__proto__, document.__proto__];
68 for (var i = 0; i < touchEvents.length; ++i) {
69 for (var j = 0; j < recepients.length; ++j) {
70 if (!(touchEvents[i] in recepients[j])) {
71 Object.defineProperty(
72 recepients[j], touchEvents[i], {value: null, writable: true, con figurable: true, enumerable: true});
73 }
74 }
75 }
76 };
77
78 var symbol = Emulation.MultitargetTouchModel._symbol;
79 var previous = target[symbol] || {enabled: false, configuration: 'mobile', s criptId: ''};
80
81 if (previous.enabled === current.enabled && (!current.enabled || previous.co nfiguration === current.configuration))
82 return;
83
84 if (previous.scriptId) {
85 target.pageAgent().removeScriptToEvaluateOnLoad(previous.scriptId);
86 target[symbol].scriptId = '';
87 }
88
89 target[symbol] = current;
90 target[symbol].scriptId = '';
91
92 if (current.enabled)
93 target.pageAgent().addScriptToEvaluateOnLoad('(' + injectedFunction.toStri ng() + ')()', scriptAddedCallback);
94
95 /**
96 * @param {?Protocol.Error} error
97 * @param {string} scriptId
98 */
99 function scriptAddedCallback(error, scriptId) {
100 (target[symbol] || {}).scriptId = error ? '' : scriptId;
101 }
102
103 target.emulationAgent().setTouchEmulationEnabled(current.enabled, current.co nfiguration);
104 }
105
106 /**
107 * @param {!Common.Event} event
108 */
109 _inspectModeToggled(event) {
110 var overlayModel = /** @type {!SDK.OverlayModel} */ (event.data);
111 this._applyToTarget(overlayModel.target());
112 }
113
114 /**
115 * @override
116 * @param {!SDK.Target} target
117 */
118 targetAdded(target) {
119 var overlayModel = target.model(SDK.OverlayModel);
120 if (overlayModel)
121 overlayModel.addEventListener(SDK.OverlayModel.Events.InspectModeWillBeTog gled, this._inspectModeToggled, this);
122 this._applyToTarget(target);
123 }
124
125 /**
126 * @override
127 * @param {!SDK.Target} target
128 */
129 targetRemoved(target) {
130 var overlayModel = target.model(SDK.OverlayModel);
131 if (overlayModel) {
132 overlayModel.removeEventListener(
133 SDK.OverlayModel.Events.InspectModeWillBeToggled, this._inspectModeTog gled, this);
134 }
135 }
136 };
137
138 Emulation.MultitargetTouchModel._symbol = Symbol('MultitargetTouchModel.symbol') ;
139
140 /** @type {?Emulation.MultitargetTouchModel} */
141 Emulation.MultitargetTouchModel._instance = null;
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