michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=8 sts=2 et sw=2 tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "mozilla/dom/TouchEvent.h"
michael@0: #include "mozilla/dom/Touch.h"
michael@0: #include "mozilla/dom/TouchListBinding.h"
michael@0: #include "mozilla/Preferences.h"
michael@0: #include "mozilla/TouchEvents.h"
michael@0: #include "nsContentUtils.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: #ifdef XP_WIN
michael@0: namespace widget {
michael@0: extern int32_t IsTouchDeviceSupportPresent();
michael@0: } // namespace widget
michael@0: #endif // #ifdef XP_WIN
michael@0: 
michael@0: namespace dom {
michael@0: 
michael@0: /******************************************************************************
michael@0:  * TouchList
michael@0:  *****************************************************************************/
michael@0: 
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TouchList)
michael@0:   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
michael@0:   NS_INTERFACE_MAP_ENTRY(nsISupports)
michael@0: NS_INTERFACE_MAP_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_2(TouchList, mParent, mPoints)
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTING_ADDREF(TouchList)
michael@0: NS_IMPL_CYCLE_COLLECTING_RELEASE(TouchList)
michael@0: 
michael@0: JSObject*
michael@0: TouchList::WrapObject(JSContext* aCx)
michael@0: {
michael@0:   return TouchListBinding::Wrap(aCx, this);
michael@0: }
michael@0: 
michael@0: // static
michael@0: bool
michael@0: TouchList::PrefEnabled(JSContext* aCx, JSObject* aGlobal)
michael@0: {
michael@0:   return TouchEvent::PrefEnabled(aCx, aGlobal);
michael@0: }
michael@0: 
michael@0: Touch*
michael@0: TouchList::IdentifiedTouch(int32_t aIdentifier) const
michael@0: {
michael@0:   for (uint32_t i = 0; i < mPoints.Length(); ++i) {
michael@0:     Touch* point = mPoints[i];
michael@0:     if (point && point->Identifier() == aIdentifier) {
michael@0:       return point;
michael@0:     }
michael@0:   }
michael@0:   return nullptr;
michael@0: }
michael@0: 
michael@0: /******************************************************************************
michael@0:  * TouchEvent
michael@0:  *****************************************************************************/
michael@0: 
michael@0: TouchEvent::TouchEvent(EventTarget* aOwner,
michael@0:                        nsPresContext* aPresContext,
michael@0:                        WidgetTouchEvent* aEvent)
michael@0:   : UIEvent(aOwner, aPresContext,
michael@0:             aEvent ? aEvent : new WidgetTouchEvent(false, 0, nullptr))
michael@0: {
michael@0:   if (aEvent) {
michael@0:     mEventIsInternal = false;
michael@0: 
michael@0:     for (uint32_t i = 0; i < aEvent->touches.Length(); ++i) {
michael@0:       Touch* touch = aEvent->touches[i];
michael@0:       touch->InitializePoints(mPresContext, aEvent);
michael@0:     }
michael@0:   } else {
michael@0:     mEventIsInternal = true;
michael@0:     mEvent->time = PR_Now();
michael@0:   }
michael@0: }
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_INHERITED(TouchEvent, UIEvent,
michael@0:                                    mTouches,
michael@0:                                    mTargetTouches,
michael@0:                                    mChangedTouches)
michael@0: 
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TouchEvent)
michael@0: NS_INTERFACE_MAP_END_INHERITING(UIEvent)
michael@0: 
michael@0: NS_IMPL_ADDREF_INHERITED(TouchEvent, UIEvent)
michael@0: NS_IMPL_RELEASE_INHERITED(TouchEvent, UIEvent)
michael@0: 
michael@0: void
michael@0: TouchEvent::InitTouchEvent(const nsAString& aType,
michael@0:                            bool aCanBubble,
michael@0:                            bool aCancelable,
michael@0:                            nsIDOMWindow* aView,
michael@0:                            int32_t aDetail,
michael@0:                            bool aCtrlKey,
michael@0:                            bool aAltKey,
michael@0:                            bool aShiftKey,
michael@0:                            bool aMetaKey,
michael@0:                            TouchList* aTouches,
michael@0:                            TouchList* aTargetTouches,
michael@0:                            TouchList* aChangedTouches,
michael@0:                            ErrorResult& aRv)
michael@0: {
michael@0:   aRv = UIEvent::InitUIEvent(aType, aCanBubble, aCancelable, aView, aDetail);
michael@0:   if (aRv.Failed()) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   mEvent->AsInputEvent()->InitBasicModifiers(aCtrlKey, aAltKey,
michael@0:                                              aShiftKey, aMetaKey);
michael@0:   mTouches = aTouches;
michael@0:   mTargetTouches = aTargetTouches;
michael@0:   mChangedTouches = aChangedTouches;
michael@0: }
michael@0: 
michael@0: TouchList*
michael@0: TouchEvent::Touches()
michael@0: {
michael@0:   if (!mTouches) {
michael@0:     WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
michael@0:     if (mEvent->message == NS_TOUCH_END || mEvent->message == NS_TOUCH_CANCEL) {
michael@0:       // for touchend events, remove any changed touches from the touches array
michael@0:       nsTArray< nsRefPtr<Touch> > unchangedTouches;
michael@0:       const nsTArray< nsRefPtr<Touch> >& touches = touchEvent->touches;
michael@0:       for (uint32_t i = 0; i < touches.Length(); ++i) {
michael@0:         if (!touches[i]->mChanged) {
michael@0:           unchangedTouches.AppendElement(touches[i]);
michael@0:         }
michael@0:       }
michael@0:       mTouches = new TouchList(ToSupports(this), unchangedTouches);
michael@0:     } else {
michael@0:       mTouches = new TouchList(ToSupports(this), touchEvent->touches);
michael@0:     }
michael@0:   }
michael@0:   return mTouches;
michael@0: }
michael@0: 
michael@0: TouchList*
michael@0: TouchEvent::TargetTouches()
michael@0: {
michael@0:   if (!mTargetTouches) {
michael@0:     nsTArray< nsRefPtr<Touch> > targetTouches;
michael@0:     WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
michael@0:     const nsTArray< nsRefPtr<Touch> >& touches = touchEvent->touches;
michael@0:     for (uint32_t i = 0; i < touches.Length(); ++i) {
michael@0:       // for touchend/cancel events, don't append to the target list if this is a
michael@0:       // touch that is ending
michael@0:       if ((mEvent->message != NS_TOUCH_END &&
michael@0:            mEvent->message != NS_TOUCH_CANCEL) || !touches[i]->mChanged) {
michael@0:         if (touches[i]->mTarget == mEvent->originalTarget) {
michael@0:           targetTouches.AppendElement(touches[i]);
michael@0:         }
michael@0:       }
michael@0:     }
michael@0:     mTargetTouches = new TouchList(ToSupports(this), targetTouches);
michael@0:   }
michael@0:   return mTargetTouches;
michael@0: }
michael@0: 
michael@0: TouchList*
michael@0: TouchEvent::ChangedTouches()
michael@0: {
michael@0:   if (!mChangedTouches) {
michael@0:     nsTArray< nsRefPtr<Touch> > changedTouches;
michael@0:     WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
michael@0:     const nsTArray< nsRefPtr<Touch> >& touches = touchEvent->touches;
michael@0:     for (uint32_t i = 0; i < touches.Length(); ++i) {
michael@0:       if (touches[i]->mChanged) {
michael@0:         changedTouches.AppendElement(touches[i]);
michael@0:       }
michael@0:     }
michael@0:     mChangedTouches = new TouchList(ToSupports(this), changedTouches);
michael@0:   }
michael@0:   return mChangedTouches;
michael@0: }
michael@0: 
michael@0: // static
michael@0: bool
michael@0: TouchEvent::PrefEnabled(JSContext* aCx, JSObject* aGlobal)
michael@0: {
michael@0:   bool prefValue = false;
michael@0:   int32_t flag = 0;
michael@0:   if (NS_SUCCEEDED(Preferences::GetInt("dom.w3c_touch_events.enabled",
michael@0:                                         &flag))) {
michael@0:     if (flag == 2) {
michael@0: #ifdef XP_WIN
michael@0:       static bool sDidCheckTouchDeviceSupport = false;
michael@0:       static bool sIsTouchDeviceSupportPresent = false;
michael@0:       // On Windows we auto-detect based on device support.
michael@0:       if (!sDidCheckTouchDeviceSupport) {
michael@0:         sDidCheckTouchDeviceSupport = true;
michael@0:         sIsTouchDeviceSupportPresent = widget::IsTouchDeviceSupportPresent();
michael@0:       }
michael@0:       prefValue = sIsTouchDeviceSupportPresent;
michael@0: #else
michael@0:       NS_WARNING("dom.w3c_touch_events.enabled=2 not implemented!");
michael@0:       prefValue = false;
michael@0: #endif
michael@0:     } else {
michael@0:       prefValue = !!flag;
michael@0:     }
michael@0:   }
michael@0:   if (prefValue) {
michael@0:     nsContentUtils::InitializeTouchEventTable();
michael@0:   }
michael@0:   return prefValue;
michael@0: }
michael@0: 
michael@0: bool
michael@0: TouchEvent::AltKey()
michael@0: {
michael@0:   return mEvent->AsTouchEvent()->IsAlt();
michael@0: }
michael@0: 
michael@0: bool
michael@0: TouchEvent::MetaKey()
michael@0: {
michael@0:   return mEvent->AsTouchEvent()->IsMeta();
michael@0: }
michael@0: 
michael@0: bool
michael@0: TouchEvent::CtrlKey()
michael@0: {
michael@0:   return mEvent->AsTouchEvent()->IsControl();
michael@0: }
michael@0: 
michael@0: bool
michael@0: TouchEvent::ShiftKey()
michael@0: {
michael@0:   return mEvent->AsTouchEvent()->IsShift();
michael@0: }
michael@0: 
michael@0: } // namespace dom
michael@0: } // namespace mozilla
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: nsresult
michael@0: NS_NewDOMTouchEvent(nsIDOMEvent** aInstancePtrResult,
michael@0:                     EventTarget* aOwner,
michael@0:                     nsPresContext* aPresContext,
michael@0:                     WidgetTouchEvent* aEvent)
michael@0: {
michael@0:   TouchEvent* it = new TouchEvent(aOwner, aPresContext, aEvent);
michael@0:   NS_ADDREF(it);
michael@0:   *aInstancePtrResult = static_cast<Event*>(it);
michael@0:   return NS_OK;
michael@0: }