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1 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 : /* This Source Code Form is subject to the terms of the Mozilla Public
4 : * License, v. 2.0. If a copy of the MPL was not distributed with this
5 : * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 :
7 : #include "mozilla/dom/Touch.h"
8 :
9 : #include "mozilla/dom/EventTarget.h"
10 : #include "mozilla/dom/TouchEvent.h"
11 : #include "nsGlobalWindow.h"
12 : #include "nsContentUtils.h"
13 : #include "nsIContent.h"
14 :
15 : namespace mozilla {
16 : namespace dom {
17 :
18 : // static
19 : already_AddRefed<Touch>
20 0 : Touch::Constructor(const GlobalObject& aGlobal,
21 : const TouchInit& aParam,
22 : ErrorResult& aRv)
23 : {
24 : // Annoyingly many parameters, make sure the ordering is the same as in the
25 : // Touch constructor.
26 : RefPtr<Touch> touch = new Touch(aParam.mTarget,
27 0 : aParam.mIdentifier,
28 0 : aParam.mPageX,
29 0 : aParam.mPageY,
30 0 : aParam.mScreenX,
31 0 : aParam.mScreenY,
32 0 : aParam.mClientX,
33 0 : aParam.mClientY,
34 0 : aParam.mRadiusX,
35 0 : aParam.mRadiusY,
36 0 : aParam.mRotationAngle,
37 0 : aParam.mForce);
38 0 : return touch.forget();
39 : }
40 :
41 0 : Touch::Touch(EventTarget* aTarget,
42 : int32_t aIdentifier,
43 : int32_t aPageX,
44 : int32_t aPageY,
45 : int32_t aScreenX,
46 : int32_t aScreenY,
47 : int32_t aClientX,
48 : int32_t aClientY,
49 : int32_t aRadiusX,
50 : int32_t aRadiusY,
51 : float aRotationAngle,
52 0 : float aForce)
53 : {
54 0 : mTarget = aTarget;
55 0 : mIdentifier = aIdentifier;
56 0 : mPagePoint = CSSIntPoint(aPageX, aPageY);
57 0 : mScreenPoint = CSSIntPoint(aScreenX, aScreenY);
58 0 : mClientPoint = CSSIntPoint(aClientX, aClientY);
59 0 : mRefPoint = LayoutDeviceIntPoint(0, 0);
60 0 : mPointsInitialized = true;
61 0 : mRadius.x = aRadiusX;
62 0 : mRadius.y = aRadiusY;
63 0 : mRotationAngle = aRotationAngle;
64 0 : mForce = aForce;
65 :
66 0 : mChanged = false;
67 0 : mMessage = 0;
68 0 : nsJSContext::LikelyShortLivingObjectCreated();
69 0 : }
70 :
71 0 : Touch::Touch(int32_t aIdentifier,
72 : LayoutDeviceIntPoint aPoint,
73 : LayoutDeviceIntPoint aRadius,
74 : float aRotationAngle,
75 0 : float aForce)
76 : {
77 0 : mIdentifier = aIdentifier;
78 0 : mPagePoint = CSSIntPoint(0, 0);
79 0 : mScreenPoint = CSSIntPoint(0, 0);
80 0 : mClientPoint = CSSIntPoint(0, 0);
81 0 : mRefPoint = aPoint;
82 0 : mPointsInitialized = false;
83 0 : mRadius = aRadius;
84 0 : mRotationAngle = aRotationAngle;
85 0 : mForce = aForce;
86 :
87 0 : mChanged = false;
88 0 : mMessage = 0;
89 0 : nsJSContext::LikelyShortLivingObjectCreated();
90 0 : }
91 :
92 0 : Touch::Touch(const Touch& aOther)
93 : : mTarget(aOther.mTarget)
94 : , mRefPoint(aOther.mRefPoint)
95 0 : , mChanged(aOther.mChanged)
96 0 : , mMessage(aOther.mMessage)
97 0 : , mIdentifier(aOther.mIdentifier)
98 : , mPagePoint(aOther.mPagePoint)
99 : , mClientPoint(aOther.mClientPoint)
100 : , mScreenPoint(aOther.mScreenPoint)
101 : , mRadius(aOther.mRadius)
102 0 : , mRotationAngle(aOther.mRotationAngle)
103 0 : , mForce(aOther.mForce)
104 0 : , mPointsInitialized(aOther.mPointsInitialized)
105 : {
106 0 : nsJSContext::LikelyShortLivingObjectCreated();
107 0 : }
108 :
109 0 : Touch::~Touch()
110 : {
111 0 : }
112 :
113 : // static
114 : bool
115 0 : Touch::PrefEnabled(JSContext* aCx, JSObject* aGlobal)
116 : {
117 0 : return TouchEvent::PrefEnabled(aCx, aGlobal);
118 : }
119 :
120 0 : NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Touch, mTarget)
121 :
122 0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Touch)
123 0 : NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
124 0 : NS_INTERFACE_MAP_ENTRY(nsISupports)
125 0 : NS_INTERFACE_MAP_END
126 :
127 0 : NS_IMPL_CYCLE_COLLECTING_ADDREF(Touch)
128 0 : NS_IMPL_CYCLE_COLLECTING_RELEASE(Touch)
129 :
130 : EventTarget*
131 0 : Touch::GetTarget() const
132 : {
133 0 : nsCOMPtr<nsIContent> content = do_QueryInterface(mTarget);
134 0 : if (content && content->ChromeOnlyAccess() &&
135 0 : !nsContentUtils::LegacyIsCallerNativeCode() &&
136 0 : !nsContentUtils::CanAccessNativeAnon()) {
137 0 : return content->FindFirstNonChromeOnlyAccessContent();
138 : }
139 :
140 0 : return mTarget;
141 : }
142 :
143 : int32_t
144 0 : Touch::ScreenX(CallerType aCallerType) const
145 : {
146 0 : if (nsContentUtils::ResistFingerprinting(aCallerType)) {
147 0 : return ClientX();
148 : }
149 :
150 0 : return mScreenPoint.x;
151 : }
152 :
153 : int32_t
154 0 : Touch::ScreenY(CallerType aCallerType) const
155 : {
156 0 : if (nsContentUtils::ResistFingerprinting(aCallerType)) {
157 0 : return ClientY();
158 : }
159 :
160 0 : return mScreenPoint.y;
161 : }
162 :
163 : void
164 0 : Touch::InitializePoints(nsPresContext* aPresContext, WidgetEvent* aEvent)
165 : {
166 0 : if (mPointsInitialized) {
167 0 : return;
168 : }
169 : mClientPoint = Event::GetClientCoords(
170 0 : aPresContext, aEvent, mRefPoint, mClientPoint);
171 : mPagePoint = Event::GetPageCoords(
172 0 : aPresContext, aEvent, mRefPoint, mClientPoint);
173 0 : mScreenPoint = Event::GetScreenCoords(aPresContext, aEvent, mRefPoint);
174 0 : mPointsInitialized = true;
175 : }
176 :
177 : void
178 0 : Touch::SetTarget(EventTarget* aTarget)
179 : {
180 0 : mTarget = aTarget;
181 0 : }
182 :
183 : bool
184 0 : Touch::Equals(Touch* aTouch)
185 : {
186 0 : return mRefPoint == aTouch->mRefPoint &&
187 0 : mForce == aTouch->Force() &&
188 0 : mRotationAngle == aTouch->RotationAngle() &&
189 0 : mRadius.x == aTouch->RadiusX() &&
190 0 : mRadius.y == aTouch->RadiusY();
191 : }
192 :
193 : JSObject*
194 0 : Touch::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
195 : {
196 0 : return TouchBinding::Wrap(aCx, this, aGivenProto);
197 : }
198 :
199 : // Parent ourselves to the global of the target. This achieves the desirable
200 : // effects of parenting to the target, but avoids making the touch inaccessible
201 : // when the target happens to be NAC and therefore reflected into the XBL scope.
202 : nsIGlobalObject*
203 0 : Touch::GetParentObject()
204 : {
205 0 : if (!mTarget) {
206 0 : return nullptr;
207 : }
208 0 : return mTarget->GetOwnerGlobal();
209 : }
210 :
211 : } // namespace dom
212 : } // namespace mozilla
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