1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/events/WheelEvent.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,219 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.8 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "mozilla/dom/WheelEvent.h"
1.11 +#include "mozilla/MouseEvents.h"
1.12 +#include "prtime.h"
1.13 +
1.14 +namespace mozilla {
1.15 +namespace dom {
1.16 +
1.17 +WheelEvent::WheelEvent(EventTarget* aOwner,
1.18 + nsPresContext* aPresContext,
1.19 + WidgetWheelEvent* aWheelEvent)
1.20 + : MouseEvent(aOwner, aPresContext,
1.21 + aWheelEvent ? aWheelEvent :
1.22 + new WidgetWheelEvent(false, 0, nullptr))
1.23 + , mAppUnitsPerDevPixel(0)
1.24 +{
1.25 + if (aWheelEvent) {
1.26 + mEventIsInternal = false;
1.27 + // If the delta mode is pixel, the WidgetWheelEvent's delta values are in
1.28 + // device pixels. However, JS contents need the delta values in CSS pixels.
1.29 + // We should store the value of mAppUnitsPerDevPixel here because
1.30 + // it might be changed by changing zoom or something.
1.31 + if (aWheelEvent->deltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL) {
1.32 + mAppUnitsPerDevPixel = aPresContext->AppUnitsPerDevPixel();
1.33 + }
1.34 + } else {
1.35 + mEventIsInternal = true;
1.36 + mEvent->time = PR_Now();
1.37 + mEvent->refPoint.x = mEvent->refPoint.y = 0;
1.38 + mEvent->AsWheelEvent()->inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
1.39 + }
1.40 +}
1.41 +
1.42 +NS_IMPL_ADDREF_INHERITED(WheelEvent, MouseEvent)
1.43 +NS_IMPL_RELEASE_INHERITED(WheelEvent, MouseEvent)
1.44 +
1.45 +NS_INTERFACE_MAP_BEGIN(WheelEvent)
1.46 + NS_INTERFACE_MAP_ENTRY(nsIDOMWheelEvent)
1.47 +NS_INTERFACE_MAP_END_INHERITING(MouseEvent)
1.48 +
1.49 +NS_IMETHODIMP
1.50 +WheelEvent::InitWheelEvent(const nsAString& aType,
1.51 + bool aCanBubble,
1.52 + bool aCancelable,
1.53 + nsIDOMWindow* aView,
1.54 + int32_t aDetail,
1.55 + int32_t aScreenX,
1.56 + int32_t aScreenY,
1.57 + int32_t aClientX,
1.58 + int32_t aClientY,
1.59 + uint16_t aButton,
1.60 + nsIDOMEventTarget* aRelatedTarget,
1.61 + const nsAString& aModifiersList,
1.62 + double aDeltaX,
1.63 + double aDeltaY,
1.64 + double aDeltaZ,
1.65 + uint32_t aDeltaMode)
1.66 +{
1.67 + nsresult rv =
1.68 + MouseEvent::InitMouseEvent(aType, aCanBubble, aCancelable, aView, aDetail,
1.69 + aScreenX, aScreenY, aClientX, aClientY, aButton,
1.70 + aRelatedTarget, aModifiersList);
1.71 + NS_ENSURE_SUCCESS(rv, rv);
1.72 +
1.73 + WidgetWheelEvent* wheelEvent = mEvent->AsWheelEvent();
1.74 + wheelEvent->deltaX = aDeltaX;
1.75 + wheelEvent->deltaY = aDeltaY;
1.76 + wheelEvent->deltaZ = aDeltaZ;
1.77 + wheelEvent->deltaMode = aDeltaMode;
1.78 +
1.79 + return NS_OK;
1.80 +}
1.81 +
1.82 +double
1.83 +WheelEvent::DeltaX()
1.84 +{
1.85 + if (!mAppUnitsPerDevPixel) {
1.86 + return mEvent->AsWheelEvent()->deltaX;
1.87 + }
1.88 + return mEvent->AsWheelEvent()->deltaX *
1.89 + mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
1.90 +}
1.91 +
1.92 +NS_IMETHODIMP
1.93 +WheelEvent::GetDeltaX(double* aDeltaX)
1.94 +{
1.95 + NS_ENSURE_ARG_POINTER(aDeltaX);
1.96 +
1.97 + *aDeltaX = DeltaX();
1.98 + return NS_OK;
1.99 +}
1.100 +
1.101 +double
1.102 +WheelEvent::DeltaY()
1.103 +{
1.104 + if (!mAppUnitsPerDevPixel) {
1.105 + return mEvent->AsWheelEvent()->deltaY;
1.106 + }
1.107 + return mEvent->AsWheelEvent()->deltaY *
1.108 + mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
1.109 +}
1.110 +
1.111 +NS_IMETHODIMP
1.112 +WheelEvent::GetDeltaY(double* aDeltaY)
1.113 +{
1.114 + NS_ENSURE_ARG_POINTER(aDeltaY);
1.115 +
1.116 + *aDeltaY = DeltaY();
1.117 + return NS_OK;
1.118 +}
1.119 +
1.120 +double
1.121 +WheelEvent::DeltaZ()
1.122 +{
1.123 + if (!mAppUnitsPerDevPixel) {
1.124 + return mEvent->AsWheelEvent()->deltaZ;
1.125 + }
1.126 + return mEvent->AsWheelEvent()->deltaZ *
1.127 + mAppUnitsPerDevPixel / nsPresContext::AppUnitsPerCSSPixel();
1.128 +}
1.129 +
1.130 +NS_IMETHODIMP
1.131 +WheelEvent::GetDeltaZ(double* aDeltaZ)
1.132 +{
1.133 + NS_ENSURE_ARG_POINTER(aDeltaZ);
1.134 +
1.135 + *aDeltaZ = DeltaZ();
1.136 + return NS_OK;
1.137 +}
1.138 +
1.139 +uint32_t
1.140 +WheelEvent::DeltaMode()
1.141 +{
1.142 + return mEvent->AsWheelEvent()->deltaMode;
1.143 +}
1.144 +
1.145 +NS_IMETHODIMP
1.146 +WheelEvent::GetDeltaMode(uint32_t* aDeltaMode)
1.147 +{
1.148 + NS_ENSURE_ARG_POINTER(aDeltaMode);
1.149 +
1.150 + *aDeltaMode = DeltaMode();
1.151 + return NS_OK;
1.152 +}
1.153 +
1.154 +static void
1.155 +GetModifierList(bool aCtrl, bool aShift, bool aAlt, bool aMeta,
1.156 + nsAString& aModifierList)
1.157 +{
1.158 + if (aCtrl) {
1.159 + aModifierList.AppendLiteral(NS_DOM_KEYNAME_CONTROL);
1.160 + }
1.161 + if (aShift) {
1.162 + if (!aModifierList.IsEmpty()) {
1.163 + aModifierList.AppendLiteral(" ");
1.164 + }
1.165 + aModifierList.AppendLiteral(NS_DOM_KEYNAME_SHIFT);
1.166 + }
1.167 + if (aAlt) {
1.168 + if (!aModifierList.IsEmpty()) {
1.169 + aModifierList.AppendLiteral(" ");
1.170 + }
1.171 + aModifierList.AppendLiteral(NS_DOM_KEYNAME_ALT);
1.172 + }
1.173 + if (aMeta) {
1.174 + if (!aModifierList.IsEmpty()) {
1.175 + aModifierList.AppendLiteral(" ");
1.176 + }
1.177 + aModifierList.AppendLiteral(NS_DOM_KEYNAME_META);
1.178 + }
1.179 +}
1.180 +
1.181 +already_AddRefed<WheelEvent>
1.182 +WheelEvent::Constructor(const GlobalObject& aGlobal,
1.183 + const nsAString& aType,
1.184 + const WheelEventInit& aParam,
1.185 + ErrorResult& aRv)
1.186 +{
1.187 + nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
1.188 + nsRefPtr<WheelEvent> e = new WheelEvent(t, nullptr, nullptr);
1.189 + bool trusted = e->Init(t);
1.190 + nsAutoString modifierList;
1.191 + GetModifierList(aParam.mCtrlKey, aParam.mShiftKey,
1.192 + aParam.mAltKey, aParam.mMetaKey,
1.193 + modifierList);
1.194 + aRv = e->InitWheelEvent(aType, aParam.mBubbles, aParam.mCancelable,
1.195 + aParam.mView, aParam.mDetail,
1.196 + aParam.mScreenX, aParam.mScreenY,
1.197 + aParam.mClientX, aParam.mClientY,
1.198 + aParam.mButton, aParam.mRelatedTarget,
1.199 + modifierList, aParam.mDeltaX,
1.200 + aParam.mDeltaY, aParam.mDeltaZ, aParam.mDeltaMode);
1.201 + e->mEvent->AsWheelEvent()->buttons = aParam.mButtons;
1.202 + e->SetTrusted(trusted);
1.203 + return e.forget();
1.204 +}
1.205 +
1.206 +} // namespace dom
1.207 +} // namespace mozilla
1.208 +
1.209 +using namespace mozilla;
1.210 +using namespace mozilla::dom;
1.211 +
1.212 +nsresult
1.213 +NS_NewDOMWheelEvent(nsIDOMEvent** aInstancePtrResult,
1.214 + EventTarget* aOwner,
1.215 + nsPresContext* aPresContext,
1.216 + WidgetWheelEvent* aEvent)
1.217 +{
1.218 + WheelEvent* it = new WheelEvent(aOwner, aPresContext, aEvent);
1.219 + NS_ADDREF(it);
1.220 + *aInstancePtrResult = static_cast<Event*>(it);
1.221 + return NS_OK;
1.222 +}
