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comparison: dom/events/WheelEvent.cpp
dom/events/WheelEvent.cpp
- changeset 0
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| -1:000000000000 | 0:a96c39ec3853 |
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=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 file, | |
| 5 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "mozilla/dom/WheelEvent.h" | |
| 8 #include "mozilla/MouseEvents.h" | |
| 9 #include "prtime.h" | |
| 10 | |
| 11 namespace mozilla { | |
| 12 namespace dom { | |
| 13 | |
| 14 WheelEvent::WheelEvent(EventTarget* aOwner, | |
| 15 nsPresContext* aPresContext, | |
| 16 WidgetWheelEvent* aWheelEvent) | |
| 17 : MouseEvent(aOwner, aPresContext, | |
| 18 aWheelEvent ? aWheelEvent : | |
| 19 new WidgetWheelEvent(false, 0, nullptr)) | |
| 20 , mAppUnitsPerDevPixel(0) | |
| 21 { | |
| 22 if (aWheelEvent) { | |
| 23 mEventIsInternal = false; | |
| 24 // If the delta mode is pixel, the WidgetWheelEvent's delta values are in | |
| 25 // device pixels. However, JS contents need the delta values in CSS pixels. | |
| 26 // We should store the value of mAppUnitsPerDevPixel here because | |
| 27 // it might be changed by changing zoom or something. | |
| 28 if (aWheelEvent->deltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL) { | |
| 29 mAppUnitsPerDevPixel = aPresContext->AppUnitsPerDevPixel(); | |
| 30 } | |
| 31 } else { | |
| 32 mEventIsInternal = true; | |
| 33 mEvent->time = PR_Now(); | |
| 34 mEvent->refPoint.x = mEvent->refPoint.y = 0; | |
| 35 mEvent->AsWheelEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN; | |
| 36 } | |
| 37 } | |
| 38 | |
| 39 NS_IMPL_ADDREF_INHERITED(WheelEvent, MouseEvent) | |
| 40 NS_IMPL_RELEASE_INHERITED(WheelEvent, MouseEvent) | |
| 41 | |
| 42 NS_INTERFACE_MAP_BEGIN(WheelEvent) | |
| 43 NS_INTERFACE_MAP_ENTRY(nsIDOMWheelEvent) | |
| 44 NS_INTERFACE_MAP_END_INHERITING(MouseEvent) | |
| 45 | |
| 46 NS_IMETHODIMP | |
| 47 WheelEvent::InitWheelEvent(const nsAString& aType, | |
| 48 bool aCanBubble, | |
| 49 bool aCancelable, | |
| 50 nsIDOMWindow* aView, | |
| 51 int32_t aDetail, | |
| 52 int32_t aScreenX, | |
| 53 int32_t aScreenY, | |
| 54 int32_t aClientX, | |
| 55 int32_t aClientY, | |
| 56 uint16_t aButton, | |
| 57 nsIDOMEventTarget* aRelatedTarget, | |
| 58 const nsAString& aModifiersList, | |
| 59 double aDeltaX, | |
| 60 double aDeltaY, | |
| 61 double aDeltaZ, | |
| 62 uint32_t aDeltaMode) | |
| 63 { | |
| 64 nsresult rv = | |
| 65 MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail, | |
| 66 aScreenX, aScreenY, aClientX, aClientY, aButton, | |
| 67 aRelatedTarget, aModifiersList); | |
| 68 NS_ENSURE_SUCCESS(rv, rv); | |
| 69 | |
| 70 WidgetWheelEvent* wheelEvent = mEvent->AsWheelEvent(); | |
| 71 wheelEvent->deltaX = aDeltaX; | |
| 72 wheelEvent->deltaY = aDeltaY; | |
| 73 wheelEvent->deltaZ = aDeltaZ; | |
| 74 wheelEvent->deltaMode = aDeltaMode; | |
| 75 | |
| 76 return NS_OK; | |
| 77 } | |
| 78 | |
| 79 double | |
| 80 WheelEvent::DeltaX() | |
| 81 { | |
| 82 if (!mAppUnitsPerDevPixel) { | |
| 83 return mEvent->AsWheelEvent()->deltaX; | |
| 84 } | |
| 85 return mEvent->AsWheelEvent()->deltaX * | |
| 86 mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel(); | |
| 87 } | |
| 88 | |
| 89 NS_IMETHODIMP | |
| 90 WheelEvent::GetDeltaX(double* aDeltaX) | |
| 91 { | |
| 92 NS_ENSURE_ARG_POINTER(aDeltaX); | |
| 93 | |
| 94 *aDeltaX = DeltaX(); | |
| 95 return NS_OK; | |
| 96 } | |
| 97 | |
| 98 double | |
| 99 WheelEvent::DeltaY() | |
| 100 { | |
| 101 if (!mAppUnitsPerDevPixel) { | |
| 102 return mEvent->AsWheelEvent()->deltaY; | |
| 103 } | |
| 104 return mEvent->AsWheelEvent()->deltaY * | |
| 105 mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel(); | |
| 106 } | |
| 107 | |
| 108 NS_IMETHODIMP | |
| 109 WheelEvent::GetDeltaY(double* aDeltaY) | |
| 110 { | |
| 111 NS_ENSURE_ARG_POINTER(aDeltaY); | |
| 112 | |
| 113 *aDeltaY = DeltaY(); | |
| 114 return NS_OK; | |
| 115 } | |
| 116 | |
| 117 double | |
| 118 WheelEvent::DeltaZ() | |
| 119 { | |
| 120 if (!mAppUnitsPerDevPixel) { | |
| 121 return mEvent->AsWheelEvent()->deltaZ; | |
| 122 } | |
| 123 return mEvent->AsWheelEvent()->deltaZ * | |
| 124 mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel(); | |
| 125 } | |
| 126 | |
| 127 NS_IMETHODIMP | |
| 128 WheelEvent::GetDeltaZ(double* aDeltaZ) | |
| 129 { | |
| 130 NS_ENSURE_ARG_POINTER(aDeltaZ); | |
| 131 | |
| 132 *aDeltaZ = DeltaZ(); | |
| 133 return NS_OK; | |
| 134 } | |
| 135 | |
| 136 uint32_t | |
| 137 WheelEvent::DeltaMode() | |
| 138 { | |
| 139 return mEvent->AsWheelEvent()->deltaMode; | |
| 140 } | |
| 141 | |
| 142 NS_IMETHODIMP | |
| 143 WheelEvent::GetDeltaMode(uint32_t* aDeltaMode) | |
| 144 { | |
| 145 NS_ENSURE_ARG_POINTER(aDeltaMode); | |
| 146 | |
| 147 *aDeltaMode = DeltaMode(); | |
| 148 return NS_OK; | |
| 149 } | |
| 150 | |
| 151 static void | |
| 152 GetModifierList(bool aCtrl, bool aShift, bool aAlt, bool aMeta, | |
| 153 nsAString& aModifierList) | |
| 154 { | |
| 155 if (aCtrl) { | |
| 156 aModifierList.AppendLiteral(NS_DOM_KEYNAME_CONTROL); | |
| 157 } | |
| 158 if (aShift) { | |
| 159 if (!aModifierList.IsEmpty()) { | |
| 160 aModifierList.AppendLiteral(" "); | |
| 161 } | |
| 162 aModifierList.AppendLiteral(NS_DOM_KEYNAME_SHIFT); | |
| 163 } | |
| 164 if (aAlt) { | |
| 165 if (!aModifierList.IsEmpty()) { | |
| 166 aModifierList.AppendLiteral(" "); | |
| 167 } | |
| 168 aModifierList.AppendLiteral(NS_DOM_KEYNAME_ALT); | |
| 169 } | |
| 170 if (aMeta) { | |
| 171 if (!aModifierList.IsEmpty()) { | |
| 172 aModifierList.AppendLiteral(" "); | |
| 173 } | |
| 174 aModifierList.AppendLiteral(NS_DOM_KEYNAME_META); | |
| 175 } | |
| 176 } | |
| 177 | |
| 178 already_AddRefed<WheelEvent> | |
| 179 WheelEvent::Constructor(const GlobalObject& aGlobal, | |
| 180 const nsAString& aType, | |
| 181 const WheelEventInit& aParam, | |
| 182 ErrorResult& aRv) | |
| 183 { | |
| 184 nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports()); | |
| 185 nsRefPtr<WheelEvent> e = new WheelEvent(t, nullptr, nullptr); | |
| 186 bool trusted = e->Init(t); | |
| 187 nsAutoString modifierList; | |
| 188 GetModifierList(aParam.mCtrlKey, aParam.mShiftKey, | |
| 189 aParam.mAltKey, aParam.mMetaKey, | |
| 190 modifierList); | |
| 191 aRv = e->InitWheelEvent(aType, aParam.mBubbles, aParam.mCancelable, | |
| 192 aParam.mView, aParam.mDetail, | |
| 193 aParam.mScreenX, aParam.mScreenY, | |
| 194 aParam.mClientX, aParam.mClientY, | |
| 195 aParam.mButton, aParam.mRelatedTarget, | |
| 196 modifierList, aParam.mDeltaX, | |
| 197 aParam.mDeltaY, aParam.mDeltaZ, aParam.mDeltaMode); | |
| 198 e->mEvent->AsWheelEvent()->buttons = aParam.mButtons; | |
| 199 e->SetTrusted(trusted); | |
| 200 return e.forget(); | |
| 201 } | |
| 202 | |
| 203 } // namespace dom | |
| 204 } // namespace mozilla | |
| 205 | |
| 206 using namespace mozilla; | |
| 207 using namespace mozilla::dom; | |
| 208 | |
| 209 nsresult | |
| 210 NS_NewDOMWheelEvent(nsIDOMEvent** aInstancePtrResult, | |
| 211 EventTarget* aOwner, | |
| 212 nsPresContext* aPresContext, | |
| 213 WidgetWheelEvent* aEvent) | |
| 214 { | |
| 215 WheelEvent* it = new WheelEvent(aOwner, aPresContext, aEvent); | |
| 216 NS_ADDREF(it); | |
| 217 *aInstancePtrResult = static_cast<Event*>(it); | |
| 218 return NS_OK; | |
| 219 } |
