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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo
This commit is contained in:
Roy Tam
commit
dcd9973243
150858 changed files with 23884658 additions and 0 deletions
303
dom/events/TouchEvent.cpp
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303
dom/events/TouchEvent.cpp
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/Navigator.h"
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#include "mozilla/dom/TouchEvent.h"
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#include "mozilla/dom/Touch.h"
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#include "mozilla/dom/TouchListBinding.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/TouchEvents.h"
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#include "nsContentUtils.h"
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#include "nsIDocShell.h"
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#include "mozilla/WidgetUtils.h"
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namespace mozilla {
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namespace dom {
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/******************************************************************************
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* TouchList
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*****************************************************************************/
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TouchList)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(TouchList, mParent, mPoints)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(TouchList)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(TouchList)
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JSObject*
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TouchList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return TouchListBinding::Wrap(aCx, this, aGivenProto);
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}
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// static
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bool
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TouchList::PrefEnabled(JSContext* aCx, JSObject* aGlobal)
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{
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return TouchEvent::PrefEnabled(aCx, aGlobal);
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}
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/******************************************************************************
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* TouchEvent
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*****************************************************************************/
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TouchEvent::TouchEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetTouchEvent* aEvent)
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: UIEvent(aOwner, aPresContext,
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aEvent ? aEvent :
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new WidgetTouchEvent(false, eVoidEvent, nullptr))
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{
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if (aEvent) {
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mEventIsInternal = false;
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for (uint32_t i = 0; i < aEvent->mTouches.Length(); ++i) {
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Touch* touch = aEvent->mTouches[i];
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touch->InitializePoints(mPresContext, aEvent);
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}
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} else {
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mEventIsInternal = true;
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mEvent->mTime = PR_Now();
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}
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(TouchEvent, UIEvent,
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mTouches,
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mTargetTouches,
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mChangedTouches)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(TouchEvent)
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NS_INTERFACE_MAP_END_INHERITING(UIEvent)
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NS_IMPL_ADDREF_INHERITED(TouchEvent, UIEvent)
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NS_IMPL_RELEASE_INHERITED(TouchEvent, UIEvent)
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void
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TouchEvent::InitTouchEvent(const nsAString& aType,
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bool aCanBubble,
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bool aCancelable,
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nsGlobalWindow* aView,
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int32_t aDetail,
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bool aCtrlKey,
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bool aAltKey,
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bool aShiftKey,
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bool aMetaKey,
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TouchList* aTouches,
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TouchList* aTargetTouches,
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TouchList* aChangedTouches)
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{
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NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
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UIEvent::InitUIEvent(aType, aCanBubble, aCancelable, aView, aDetail);
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mEvent->AsInputEvent()->InitBasicModifiers(aCtrlKey, aAltKey,
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aShiftKey, aMetaKey);
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mTouches = aTouches;
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mTargetTouches = aTargetTouches;
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mChangedTouches = aChangedTouches;
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}
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TouchList*
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TouchEvent::Touches()
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{
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if (!mTouches) {
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WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
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if (mEvent->mMessage == eTouchEnd || mEvent->mMessage == eTouchCancel) {
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// for touchend events, remove any changed touches from mTouches
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WidgetTouchEvent::AutoTouchArray unchangedTouches;
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const WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
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for (uint32_t i = 0; i < touches.Length(); ++i) {
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if (!touches[i]->mChanged) {
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unchangedTouches.AppendElement(touches[i]);
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}
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}
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mTouches = new TouchList(ToSupports(this), unchangedTouches);
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} else {
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mTouches = new TouchList(ToSupports(this), touchEvent->mTouches);
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}
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}
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return mTouches;
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}
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TouchList*
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TouchEvent::TargetTouches()
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{
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if (!mTargetTouches) {
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WidgetTouchEvent::AutoTouchArray targetTouches;
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WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
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const WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
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for (uint32_t i = 0; i < touches.Length(); ++i) {
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// for touchend/cancel events, don't append to the target list if this is a
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// touch that is ending
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if ((mEvent->mMessage != eTouchEnd && mEvent->mMessage != eTouchCancel) ||
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!touches[i]->mChanged) {
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if (touches[i]->mTarget == mEvent->mOriginalTarget) {
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targetTouches.AppendElement(touches[i]);
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}
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}
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}
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mTargetTouches = new TouchList(ToSupports(this), targetTouches);
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}
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return mTargetTouches;
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}
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TouchList*
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TouchEvent::ChangedTouches()
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{
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if (!mChangedTouches) {
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WidgetTouchEvent::AutoTouchArray changedTouches;
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WidgetTouchEvent* touchEvent = mEvent->AsTouchEvent();
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const WidgetTouchEvent::TouchArray& touches = touchEvent->mTouches;
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for (uint32_t i = 0; i < touches.Length(); ++i) {
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if (touches[i]->mChanged) {
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changedTouches.AppendElement(touches[i]);
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}
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}
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mChangedTouches = new TouchList(ToSupports(this), changedTouches);
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}
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return mChangedTouches;
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}
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// static
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bool
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TouchEvent::PrefEnabled(JSContext* aCx, JSObject* aGlobal)
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{
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nsIDocShell* docShell = nullptr;
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if (aGlobal) {
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nsGlobalWindow* win = xpc::WindowOrNull(aGlobal);
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if (win) {
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docShell = win->GetDocShell();
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}
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}
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return PrefEnabled(docShell);
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}
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// static
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bool
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TouchEvent::PrefEnabled(nsIDocShell* aDocShell)
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{
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static bool sPrefCached = false;
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static int32_t sPrefCacheValue = 0;
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uint32_t touchEventsOverride = nsIDocShell::TOUCHEVENTS_OVERRIDE_NONE;
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if (aDocShell) {
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aDocShell->GetTouchEventsOverride(&touchEventsOverride);
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}
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if (!sPrefCached) {
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sPrefCached = true;
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Preferences::AddIntVarCache(&sPrefCacheValue, "dom.w3c_touch_events.enabled");
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}
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bool enabled = false;
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if (touchEventsOverride == nsIDocShell::TOUCHEVENTS_OVERRIDE_ENABLED) {
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enabled = true;
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} else if (touchEventsOverride == nsIDocShell::TOUCHEVENTS_OVERRIDE_DISABLED) {
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enabled = false;
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} else {
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if (sPrefCacheValue == 2) {
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#if defined(MOZ_B2G) || defined(MOZ_WIDGET_ANDROID)
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// Touch support is always enabled on B2G and android.
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enabled = true;
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#elif defined(XP_WIN) || MOZ_WIDGET_GTK == 3
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static bool sDidCheckTouchDeviceSupport = false;
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static bool sIsTouchDeviceSupportPresent = false;
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// On Windows and GTK3 we auto-detect based on device support.
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if (!sDidCheckTouchDeviceSupport) {
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sDidCheckTouchDeviceSupport = true;
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sIsTouchDeviceSupportPresent = WidgetUtils::IsTouchDeviceSupportPresent();
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}
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enabled = sIsTouchDeviceSupportPresent;
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#else
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enabled = false;
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#endif
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} else {
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enabled = !!sPrefCacheValue;
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}
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}
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if (enabled) {
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nsContentUtils::InitializeTouchEventTable();
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}
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return enabled;
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}
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// static
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already_AddRefed<Event>
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TouchEvent::Constructor(const GlobalObject& aGlobal,
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const nsAString& aType,
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const TouchEventInit& aParam,
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ErrorResult& aRv)
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{
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nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
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RefPtr<TouchEvent> e = new TouchEvent(t, nullptr, nullptr);
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bool trusted = e->Init(t);
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RefPtr<TouchList> touches = e->CopyTouches(aParam.mTouches);
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RefPtr<TouchList> targetTouches = e->CopyTouches(aParam.mTargetTouches);
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RefPtr<TouchList> changedTouches = e->CopyTouches(aParam.mChangedTouches);
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e->InitTouchEvent(aType, aParam.mBubbles, aParam.mCancelable, aParam.mView,
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aParam.mDetail, aParam.mCtrlKey, aParam.mAltKey,
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aParam.mShiftKey, aParam.mMetaKey, touches, targetTouches,
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changedTouches);
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e->SetTrusted(trusted);
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e->SetComposed(aParam.mComposed);
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return e.forget();
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}
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already_AddRefed<TouchList>
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TouchEvent::CopyTouches(const Sequence<OwningNonNull<Touch>>& aTouches)
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{
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RefPtr<TouchList> list = new TouchList(GetParentObject());
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size_t len = aTouches.Length();
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for (size_t i = 0; i < len; ++i) {
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list->Append(aTouches[i]);
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}
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return list.forget();
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}
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bool
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TouchEvent::AltKey()
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{
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return mEvent->AsTouchEvent()->IsAlt();
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}
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bool
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TouchEvent::MetaKey()
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{
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return mEvent->AsTouchEvent()->IsMeta();
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}
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bool
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TouchEvent::CtrlKey()
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{
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return mEvent->AsTouchEvent()->IsControl();
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}
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bool
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TouchEvent::ShiftKey()
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{
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return mEvent->AsTouchEvent()->IsShift();
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}
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} // namespace dom
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} // namespace mozilla
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using namespace mozilla;
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using namespace mozilla::dom;
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already_AddRefed<TouchEvent>
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NS_NewDOMTouchEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetTouchEvent* aEvent)
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{
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RefPtr<TouchEvent> it = new TouchEvent(aOwner, aPresContext, aEvent);
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return it.forget();
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}
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