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nsWindow.cpp
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/* -*- Mode: c++; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <android/log.h>
#include <math.h>
#include <unistd.h>
#include "mozilla/IMEStateManager.h"
#include "mozilla/MiscEvents.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/TextComposition.h"
#include "mozilla/TextEvents.h"
#include "mozilla/TouchEvents.h"
#include "mozilla/TypeTraits.h"
#include "mozilla/WeakPtr.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/unused.h"
#include "mozilla/Preferences.h"
#include "mozilla/layers/RenderTrace.h"
#include <algorithm>
using mozilla::dom::ContentParent;
using mozilla::dom::ContentChild;
using mozilla::Unused;
#include "nsWindow.h"
#include "nsIBaseWindow.h"
#include "nsIObserverService.h"
#include "nsISelection.h"
#include "nsISupportsArray.h"
#include "nsISupportsPrimitives.h"
#include "nsIWidgetListener.h"
#include "nsIWindowWatcher.h"
#include "nsIXULWindow.h"
#include "nsAppShell.h"
#include "nsFocusManager.h"
#include "nsIdleService.h"
#include "nsLayoutUtils.h"
#include "nsViewManager.h"
#include "WidgetUtils.h"
#include "nsIDOMSimpleGestureEvent.h"
#include "nsGkAtoms.h"
#include "nsWidgetsCID.h"
#include "nsGfxCIID.h"
#include "gfxContext.h"
#include "Layers.h"
#include "mozilla/layers/LayerManagerComposite.h"
#include "mozilla/layers/AsyncCompositionManager.h"
#include "mozilla/layers/APZCTreeManager.h"
#include "mozilla/layers/APZEventState.h"
#include "mozilla/layers/APZThreadUtils.h"
#include "GLContext.h"
#include "GLContextProvider.h"
#include "ScopedGLHelpers.h"
#include "mozilla/layers/CompositorOGL.h"
#include "AndroidContentController.h"
#include "nsTArray.h"
#include "AndroidBridge.h"
#include "AndroidBridgeUtilities.h"
#include "android_npapi.h"
#include "GeneratedJNINatives.h"
#include "KeyEvent.h"
#include "MotionEvent.h"
#include "imgIEncoder.h"
#include "nsString.h"
#include "GeckoProfiler.h" // For PROFILER_LABEL
#include "nsIXULRuntime.h"
#include "nsPrintfCString.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::widget;
using namespace mozilla::layers;
NS_IMPL_ISUPPORTS_INHERITED0(nsWindow, nsBaseWidget)
static gfx::IntSize gAndroidScreenBounds;
#include "mozilla/layers/CompositorChild.h"
#include "mozilla/layers/CompositorParent.h"
#include "mozilla/layers/LayerTransactionParent.h"
#include "mozilla/Mutex.h"
#include "mozilla/Services.h"
#include "nsThreadUtils.h"
class ContentCreationNotifier;
static StaticRefPtr<ContentCreationNotifier> gContentCreationNotifier;
// A helper class to send updates when content processes
// are created. Currently an update for the screen size is sent.
class ContentCreationNotifier final : public nsIObserver
{
private:
~ContentCreationNotifier() {}
public:
NS_DECL_ISUPPORTS
NS_IMETHOD Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData) override
{
if (!strcmp(aTopic, "ipc:content-created")) {
nsCOMPtr<nsIObserver> cpo = do_QueryInterface(aSubject);
ContentParent* cp = static_cast<ContentParent*>(cpo.get());
Unused << cp->SendScreenSizeChanged(gAndroidScreenBounds);
} else if (!strcmp(aTopic, "xpcom-shutdown")) {
nsCOMPtr<nsIObserverService> obs =
mozilla::services::GetObserverService();
if (obs) {
obs->RemoveObserver(static_cast<nsIObserver*>(this),
"xpcom-shutdown");
obs->RemoveObserver(static_cast<nsIObserver*>(this),
"ipc:content-created");
}
gContentCreationNotifier = nullptr;
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(ContentCreationNotifier,
nsIObserver)
// All the toplevel windows that have been created; these are in
// stacking order, so the window at gTopLevelWindows[0] is the topmost
// one.
static nsTArray<nsWindow*> gTopLevelWindows;
// FIXME: because we don't support multiple GeckoViews for every feature
// yet, we have to default to a particular GeckoView for certain calls.
static nsWindow* gGeckoViewWindow;
static bool sFailedToCreateGLContext = false;
// Multitouch swipe thresholds in inches
static const double SWIPE_MAX_PINCH_DELTA_INCHES = 0.4;
static const double SWIPE_MIN_DISTANCE_INCHES = 0.6;
static Modifiers GetModifiers(int32_t metaState);
class nsWindow::GeckoViewSupport final
: public GeckoView::Window::Natives<GeckoViewSupport>
, public GeckoEditable::Natives<GeckoViewSupport>
, public SupportsWeakPtr<GeckoViewSupport>
, public UsesGeckoThreadProxy
{
nsWindow& window;
public:
template<typename T>
class WindowEvent : public nsAppShell::LambdaEvent<T>
{
typedef nsAppShell::LambdaEvent<T> Base;
// Static calls are never stale since they don't need native instances.
template<bool Static>
typename mozilla::EnableIf<Static, bool>::Type IsStaleCall()
{ return false; }
template<bool Static>
typename mozilla::EnableIf<!Static, bool>::Type IsStaleCall()
{
JNIEnv* const env = mozilla::jni::GetEnvForThread();
const auto& thisArg = Base::lambda.GetThisArg();
const auto natives = reinterpret_cast<
mozilla::WeakPtr<typename T::TargetClass>*>(
jni::GetNativeHandle(env, thisArg.Get()));
MOZ_CATCH_JNI_EXCEPTION(env);
// The call is stale if the nsWindow has been destroyed on the
// Gecko side, but the Java object is still attached to it through
// a weak pointer. Stale calls should be discarded. Note that it's
// an error if natives is nullptr here; we return false but the
// native call will throw an error.
return natives && !natives->get();
}
public:
WindowEvent(T&& l) : Base(mozilla::Move(l)) {}
void Run() override
{
if (!IsStaleCall<T::isStatic>()) {
return Base::Run();
}
}
nsAppShell::Event::Type ActivityType() const override
{
// Events that result in user-visible changes count as UI events.
if (Base::lambda.IsTarget(&GeckoViewSupport::OnKeyEvent) ||
Base::lambda.IsTarget(&GeckoViewSupport::OnImeReplaceText) ||
Base::lambda.IsTarget(&GeckoViewSupport::OnImeUpdateComposition))
{
return nsAppShell::Event::Type::kUIActivity;
}
return Base::ActivityType();
}
};
typedef GeckoView::Window::Natives<GeckoViewSupport> Base;
typedef GeckoEditable::Natives<GeckoViewSupport> EditableBase;
MOZ_DECLARE_WEAKREFERENCE_TYPENAME(GeckoViewSupport);
template<typename Functor>
static void OnNativeCall(Functor&& aCall)
{
if (aCall.IsTarget(&Open) && NS_IsMainThread()) {
// Gecko state probably just switched to PROFILE_READY, and the
// event loop is not running yet. Skip the event loop here so we
// can get a head start on opening our window.
return aCall();
}
return nsAppShell::PostEvent(mozilla::MakeUnique<
WindowEvent<Functor>>(mozilla::Move(aCall)));
}
GeckoViewSupport(nsWindow* aWindow,
const GeckoView::Window::LocalRef& aInstance,
GeckoView::Param aView)
: window(*aWindow)
, mEditable(GeckoEditable::New(aView))
, mIMERanges(new TextRangeArray())
, mIMEMaskEventsCount(1) // Mask IME events since there's no focus yet
, mIMEUpdatingContext(false)
, mIMESelectionChanged(false)
, mIMETextChangedDuringFlush(false)
{
Base::AttachNative(aInstance, this);
EditableBase::AttachNative(mEditable, this);
}
~GeckoViewSupport();
using Base::DisposeNative;
using EditableBase::DisposeNative;
/**
* GeckoView methods
*/
public:
// Create and attach a window.
static void Open(const jni::ClassObject::LocalRef& aCls,
GeckoView::Window::Param aWindow,
GeckoView::Param aView, jni::Object::Param aGLController,
int32_t aWidth, int32_t aHeight);
// Close and destroy the nsWindow.
void Close();
// Reattach this nsWindow to a new GeckoView.
void Reattach(GeckoView::Param aView);
/**
* GeckoEditable methods
*/
private:
/*
Rules for managing IME between Gecko and Java:
* Gecko controls the text content, and Java shadows the Gecko text
through text updates
* Gecko and Java maintain separate selections, and synchronize when
needed through selection updates and set-selection events
* Java controls the composition, and Gecko shadows the Java
composition through update composition events
*/
struct IMETextChange final {
int32_t mStart, mOldEnd, mNewEnd;
IMETextChange() :
mStart(-1), mOldEnd(-1), mNewEnd(-1) {}
IMETextChange(const IMENotification& aIMENotification)
: mStart(aIMENotification.mTextChangeData.mStartOffset)
, mOldEnd(aIMENotification.mTextChangeData.mRemovedEndOffset)
, mNewEnd(aIMENotification.mTextChangeData.mAddedEndOffset)
{
MOZ_ASSERT(aIMENotification.mMessage ==
mozilla::widget::NOTIFY_IME_OF_TEXT_CHANGE,
"IMETextChange initialized with wrong notification");
MOZ_ASSERT(aIMENotification.mTextChangeData.IsValid(),
"The text change notification isn't initialized");
MOZ_ASSERT(aIMENotification.mTextChangeData.IsInInt32Range(),
"The text change notification is out of range");
}
bool IsEmpty() const { return mStart < 0; }
};
// GeckoEditable instance used by this nsWindow;
mozilla::widget::GeckoEditable::GlobalRef mEditable;
AutoTArray<mozilla::UniquePtr<mozilla::WidgetEvent>, 8> mIMEKeyEvents;
AutoTArray<IMETextChange, 4> mIMETextChanges;
InputContext mInputContext;
RefPtr<mozilla::TextRangeArray> mIMERanges;
int32_t mIMEMaskEventsCount; // Mask events when > 0
bool mIMEUpdatingContext;
bool mIMESelectionChanged;
bool mIMETextChangedDuringFlush;
void SendIMEDummyKeyEvents();
void AddIMETextChange(const IMETextChange& aChange);
enum FlushChangesFlag {
FLUSH_FLAG_NONE,
FLUSH_FLAG_RETRY
};
void PostFlushIMEChanges();
void FlushIMEChanges(FlushChangesFlag aFlags = FLUSH_FLAG_NONE);
public:
bool NotifyIME(const IMENotification& aIMENotification);
void SetInputContext(const InputContext& aContext,
const InputContextAction& aAction);
InputContext GetInputContext();
// Handle an Android KeyEvent.
void OnKeyEvent(int32_t aAction, int32_t aKeyCode, int32_t aScanCode,
int32_t aMetaState, int64_t aTime, int32_t aUnicodeChar,
int32_t aBaseUnicodeChar, int32_t aDomPrintableKeyValue,
int32_t aRepeatCount, int32_t aFlags,
bool aIsSynthesizedImeKey);
// Synchronize Gecko thread with the InputConnection thread.
void OnImeSynchronize();
// Acknowledge focus change and send new text and selection.
void OnImeAcknowledgeFocus();
// Replace a range of text with new text.
void OnImeReplaceText(int32_t aStart, int32_t aEnd,
jni::String::Param aText);
// Add styling for a range within the active composition.
void OnImeAddCompositionRange(int32_t aStart, int32_t aEnd,
int32_t aRangeType, int32_t aRangeStyle, int32_t aRangeLineStyle,
bool aRangeBoldLine, int32_t aRangeForeColor,
int32_t aRangeBackColor, int32_t aRangeLineColor);
// Update styling for the active composition using previous-added ranges.
void OnImeUpdateComposition(int32_t aStart, int32_t aEnd);
};
/**
* NativePanZoomController handles its native calls on the UI thread, so make
* it separate from GeckoViewSupport.
*/
class nsWindow::NPZCSupport final
: public NativePanZoomController::Natives<NPZCSupport>
{
nsWindow* mWindow;
// Lock for keeping mWindow alive when accessed off of the Gecko thread.
Mutex mWindowLock;
NativePanZoomController::GlobalRef mNPZC;
public:
typedef NativePanZoomController::Natives<NPZCSupport> Base;
NPZCSupport(nsWindow* aWindow,
const NativePanZoomController::LocalRef& aNPZC)
: mWindow(aWindow)
, mWindowLock("NPZCSupport")
, mNPZC(aNPZC)
{
if (mWindow->mNPZCSupport) {
mWindow->mNPZCSupport->DetachFromWindow();
}
mWindow->mNPZCSupport = this;
}
~NPZCSupport()
{}
using Base::AttachNative;
void DetachFromWindow()
{
// There are several considerations when shutting down NPZC. 1) The
// Gecko thread may destroy NPZC at any time when nsWindow closes. 2)
// There may be pending events on the Gecko thread when NPZC is
// destroyed. 3) mWindow may not be available when the pending event
// runs. 4) The UI thread may destroy NPZC at any time when GeckoView
// is destroyed. 5) The UI thread may destroy NPZC at the same time as
// Gecko thread trying to destroy NPZC. 6) There may be pending calls
// on the UI thread when NPZC is destroyed. 7) mWindow may have been
// cleared on the Gecko thread when the pending call happens on the UI
// thread.
//
// 1) happens through DetachFromWindow, which first notifies the UI
// thread through Destroy; Destroy then calls DisposeNative, which
// finally disposes the native instance back on the Gecko thread. Using
// Destroy to indirectly call DisposeNative here also solves 5), by
// making everything go through the UI thread, avoiding contention.
//
// 2) and 3) are solved by clearing mWindow, which signals to the
// pending event that we had shut down. In that case the event bails
// and does not touch mWindow.
//
// 4) happens through DisposeNative directly. DetachFromWindow is not
// called.
//
// 6) is solved by keeping a destroyed flag in the Java NPZC instance,
// and only make a pending call if the destroyed flag is not set.
//
// 7) is solved by taking a lock whenever mWindow is modified on the
// Gecko thread or accessed on the UI thread. That way, we don't
// release mWindow until the UI thread is done using it, thus avoiding
// the race condition.
typedef NativePanZoomController::GlobalRef NPZCRef;
auto callDestroy = [] (const NPZCRef& npzc) {
npzc->Destroy();
};
NativePanZoomController::GlobalRef npzc = mNPZC;
AndroidBridge::Bridge()->PostTaskToUiThread(NewRunnableFunction(
static_cast<void(*)(const NPZCRef&)>(callDestroy),
mozilla::Move(npzc)), 0);
// Signal to any pending calls on either Gecko or UI thread that NPZC
// is being destroyed.
MutexAutoLock lock(mWindowLock);
mWindow->mNPZCSupport = nullptr;
mWindow = nullptr;
}
private:
void DisposeOnGeckoThread()
{
MOZ_ASSERT(NS_IsMainThread());
if (mWindow && mWindow->mNPZCSupport == this) {
mWindow->mNPZCSupport = nullptr;
}
// Base::DisposeNative implicitly deletes 'this'.
Base::DisposeNative(NativePanZoomController::LocalRef(
jni::GetGeckoThreadEnv(), mNPZC));
}
public:
void DisposeNative()
{
// Capturing 'this' is okay because 'this' is owned by the Java
// instance, it is alive until this lambda is run, and we make sure to
// only call DisposeNative once.
nsAppShell::PostEvent([this] {
DisposeOnGeckoThread();
});
}
void AbortAnimation()
{
MOZ_ASSERT(AndroidBridge::IsJavaUiThread());
MutexAutoLock lock(mWindowLock);
if (!mWindow) {
// We already shut down.
return;
}
RefPtr<APZCTreeManager> controller = mWindow->mAPZC;
RefPtr<CompositorParent> compositor = mWindow->mCompositorParent;
if (controller && compositor) {
// TODO: Pass in correct values for presShellId and viewId.
controller->CancelAnimation(ScrollableLayerGuid(
compositor->RootLayerTreeId(), 0, 0));
}
}
void AdjustScrollForSurfaceShift(float aX, float aY)
{
MOZ_ASSERT(AndroidBridge::IsJavaUiThread());
MutexAutoLock lock(mWindowLock);
if (!mWindow) {
// We already shut down.
return;
}
RefPtr<APZCTreeManager> controller = mWindow->mAPZC;
if (controller) {
controller->AdjustScrollForSurfaceShift(
ScreenPoint(aX, aY));
}
}
void SetIsLongpressEnabled(bool aIsLongpressEnabled)
{
MOZ_ASSERT(AndroidBridge::IsJavaUiThread());
APZCTreeManager::SetLongTapEnabled(aIsLongpressEnabled);
}
bool HandleMotionEvent(const NativePanZoomController::LocalRef& aInstance,
int32_t aAction, int32_t aActionIndex,
int64_t aTime, int32_t aMetaState,
jni::IntArray::Param aPointerId,
jni::FloatArray::Param aX,
jni::FloatArray::Param aY,
jni::FloatArray::Param aOrientation,
jni::FloatArray::Param aPressure,
jni::FloatArray::Param aToolMajor,
jni::FloatArray::Param aToolMinor)
{
MOZ_ASSERT(AndroidBridge::IsJavaUiThread());
MutexAutoLock lock(mWindowLock);
if (!mWindow) {
// We already shut down.
return false;
}
RefPtr<APZCTreeManager> controller = mWindow->mAPZC;
if (!controller) {
return false;
}
nsTArray<int32_t> pointerId(aPointerId);
MultiTouchInput::MultiTouchType type;
size_t startIndex = 0;
size_t endIndex = pointerId.Length();
switch (aAction) {
case sdk::MotionEvent::ACTION_DOWN:
case sdk::MotionEvent::ACTION_POINTER_DOWN:
type = MultiTouchInput::MULTITOUCH_START;
break;
case sdk::MotionEvent::ACTION_MOVE:
type = MultiTouchInput::MULTITOUCH_MOVE;
break;
case sdk::MotionEvent::ACTION_UP:
case sdk::MotionEvent::ACTION_POINTER_UP:
// for pointer-up events we only want the data from
// the one pointer that went up
type = MultiTouchInput::MULTITOUCH_END;
startIndex = aActionIndex;
endIndex = aActionIndex + 1;
break;
case sdk::MotionEvent::ACTION_OUTSIDE:
case sdk::MotionEvent::ACTION_CANCEL:
type = MultiTouchInput::MULTITOUCH_CANCEL;
break;
default:
return false;
}
MultiTouchInput input(type, aTime, TimeStamp(), 0);
input.modifiers = GetModifiers(aMetaState);
input.mTouches.SetCapacity(endIndex - startIndex);
nsTArray<float> x(aX);
nsTArray<float> y(aY);
nsTArray<float> orientation(aOrientation);
nsTArray<float> pressure(aPressure);
nsTArray<float> toolMajor(aToolMajor);
nsTArray<float> toolMinor(aToolMinor);
MOZ_ASSERT(pointerId.Length() == x.Length());
MOZ_ASSERT(pointerId.Length() == y.Length());
MOZ_ASSERT(pointerId.Length() == orientation.Length());
MOZ_ASSERT(pointerId.Length() == pressure.Length());
MOZ_ASSERT(pointerId.Length() == toolMajor.Length());
MOZ_ASSERT(pointerId.Length() == toolMinor.Length());
const nsIntPoint& offset =
mWindow->WidgetToScreenOffset().ToUnknownPoint();
for (size_t i = startIndex; i < endIndex; i++) {
float orien = orientation[i] * 180.0f / M_PI;
// w3c touchevents spec does not allow orientations == 90
// this shifts it to -90, which will be shifted to zero below
if (orien >= 90.0) {
orien -= 180.0f;
}
nsIntPoint point = nsIntPoint(int32_t(floorf(x[i])),
int32_t(floorf(y[i]))) - offset;
// w3c touchevent radii are given with an orientation between 0 and
// 90. The radii are found by removing the orientation and
// measuring the x and y radii of the resulting ellipse. For
// Android orientations >= 0 and < 90, use the y radius as the
// major radius, and x as the minor radius. However, for an
// orientation < 0, we have to shift the orientation by adding 90,
// and reverse which radius is major and minor.
gfx::Size radius;
if (orien < 0.0f) {
orien += 90.0f;
radius = gfx::Size(int32_t(toolMajor[i] / 2.0f),
int32_t(toolMinor[i] / 2.0f));
} else {
radius = gfx::Size(int32_t(toolMinor[i] / 2.0f),
int32_t(toolMajor[i] / 2.0f));
}
input.mTouches.AppendElement(SingleTouchData(
pointerId[i], ScreenIntPoint::FromUnknownPoint(point),
ScreenSize::FromUnknownSize(radius), orien, pressure[i]));
}
ScrollableLayerGuid guid;
uint64_t blockId;
nsEventStatus status =
controller->ReceiveInputEvent(input, &guid, &blockId);
if (status == nsEventStatus_eConsumeNoDefault) {
return true;
}
// Dispatch APZ input event on Gecko thread.
NativePanZoomController::GlobalRef npzc = mNPZC;
nsAppShell::PostEvent([npzc, input, guid, blockId, status] {
MOZ_ASSERT(NS_IsMainThread());
JNIEnv* const env = jni::GetGeckoThreadEnv();
NPZCSupport* npzcSupport = GetNative(
NativePanZoomController::LocalRef(env, npzc));
if (!npzcSupport || !npzcSupport->mWindow) {
// We already shut down.
env->ExceptionClear();
return;
}
nsWindow* const window = npzcSupport->mWindow;
window->UserActivity();
WidgetTouchEvent touchEvent = input.ToWidgetTouchEvent(window);
window->ProcessUntransformedAPZEvent(&touchEvent, guid,
blockId, status);
window->DispatchHitTest(touchEvent);
});
return true;
}
void UpdateOverscrollVelocity(const float x, const float y)
{
mNPZC->UpdateOverscrollVelocity(x, y);
}
void UpdateOverscrollOffset(const float x, const float y)
{
mNPZC->UpdateOverscrollOffset(x, y);
}
};
/**
* GLController has some unique requirements for its native calls, so make it
* separate from GeckoViewSupport.
*/
class nsWindow::GLControllerSupport final
: public GLController::Natives<GLControllerSupport>
, public SupportsWeakPtr<GLControllerSupport>
, public UsesGeckoThreadProxy
{
nsWindow& window;
GLController::GlobalRef mGLController;
GeckoLayerClient::GlobalRef mLayerClient;
Atomic<bool, ReleaseAcquire> mCompositorPaused;
// In order to use Event::HasSameTypeAs in PostTo(), we cannot make
// GLControllerEvent a template because each template instantiation is
// a different type. So implement GLControllerEvent as a ProxyEvent.
class GLControllerEvent final : public nsAppShell::ProxyEvent
{
using Event = nsAppShell::Event;
public:
static UniquePtr<Event> MakeEvent(UniquePtr<Event>&& event)
{
return MakeUnique<GLControllerEvent>(mozilla::Move(event));
}
GLControllerEvent(UniquePtr<Event>&& event)
: nsAppShell::ProxyEvent(mozilla::Move(event))
{}
void PostTo(LinkedList<Event>& queue) override
{
// Give priority to compositor events, but keep in order with
// existing compositor events.
nsAppShell::Event* event = queue.getFirst();
while (event && event->HasSameTypeAs(this)) {
event = event->getNext();
}
if (event) {
event->setPrevious(this);
} else {
queue.insertBack(this);
}
}
};
public:
typedef GLController::Natives<GLControllerSupport> Base;
MOZ_DECLARE_WEAKREFERENCE_TYPENAME(GLControllerSupport);
template<class Functor>
static void OnNativeCall(Functor&& aCall)
{
if (aCall.IsTarget(&GLControllerSupport::CreateCompositor) ||
aCall.IsTarget(&GLControllerSupport::PauseCompositor)) {
// These calls are blocking.
nsAppShell::SyncRunEvent(GeckoViewSupport::WindowEvent<Functor>(
mozilla::Move(aCall)), &GLControllerEvent::MakeEvent);
return;
} else if (aCall.IsTarget(
&GLControllerSupport::SyncResumeResizeCompositor)) {
// This call is synchronous. Perform the original call using a copy
// of the lambda. Then redirect the original lambda to
// OnResumedCompositor, to be run on the Gecko thread. We use
// Functor instead of our own lambda so that Functor can handle
// object lifetimes for us.
(Functor(aCall))();
aCall.SetTarget(&GLControllerSupport::OnResumedCompositor);
nsAppShell::PostEvent(
mozilla::MakeUnique<GLControllerEvent>(
mozilla::MakeUnique<GeckoViewSupport::WindowEvent<Functor>>(
mozilla::Move(aCall))));
return;
} else if (aCall.IsTarget(
&GLControllerSupport::SyncInvalidateAndScheduleComposite)) {
// This call is synchronous.
return aCall();
}
// GLControllerEvent (i.e. prioritized event) applies to
// CreateCompositor, PauseCompositor, and OnResumedCompositor. For all
// other events, use regular WindowEvent.
nsAppShell::PostEvent(
mozilla::MakeUnique<GeckoViewSupport::WindowEvent<Functor>>(
mozilla::Move(aCall)));
}
GLControllerSupport(nsWindow* aWindow,
const GLController::LocalRef& aInstance)
: window(*aWindow)
, mGLController(aInstance)
, mCompositorPaused(true)
{
Base::AttachNative(aInstance, this);
}
~GLControllerSupport()
{
if (window.mNPZCSupport) {
window.mNPZCSupport->DetachFromWindow();
}
mGLController->Destroy();
}
const GeckoLayerClient::Ref& GetLayerClient() const
{
return mLayerClient;
}
bool CompositorPaused() const
{
return mCompositorPaused;
}
EGLSurface CreateEGLSurface()
{
static jfieldID eglSurfacePointerField;
JNIEnv* const env = jni::GetEnvForThread();
if (!eglSurfacePointerField) {
AutoJNIClass egl(env, "com/google/android/gles_jni/EGLSurfaceImpl");
// The pointer type moved to a 'long' in Android L, API version 20
eglSurfacePointerField = egl.getField("mEGLSurface",
AndroidBridge::Bridge()->GetAPIVersion() >= 20 ? "J" : "I");
}
// Called on the compositor thread.
auto eglSurface = mGLController->CreateEGLSurface();
if (!eglSurface) {
// We failed to create a surface, but because the compositor is
// able to handle this failure gracefully, we pass back null
// instead of crashing.
return nullptr;
}
return reinterpret_cast<EGLSurface>(
AndroidBridge::Bridge()->GetAPIVersion() >= 20 ?
env->GetLongField(eglSurface.Get(), eglSurfacePointerField) :
env->GetIntField(eglSurface.Get(), eglSurfacePointerField));
}
private:
void OnResumedCompositor(int32_t aWidth, int32_t aHeight)
{
// When we receive this, the compositor has already been told to
// resume. (It turns out that waiting till we reach here to tell
// the compositor to resume takes too long, resulting in a black
// flash.) This means it's now safe for layer updates to occur.
// Since we might have prevented one or more draw events from
// occurring while the compositor was paused, we need to schedule
// a draw event now.
if (!mCompositorPaused) {
window.RedrawAll();
}
}
/**
* GLController methods
*/
public:
using Base::DisposeNative;
void AttachToJava(jni::Object::Param aClient, jni::Object::Param aNPZC)
{
const auto& layerClient = GeckoLayerClient::Ref::From(aClient);
AndroidBridge::Bridge()->SetLayerClient(layerClient);
// If resetting is true, Android destroyed our GeckoApp activity and we
// had to recreate it, but all the Gecko-side things were not
// destroyed. We therefore need to link up the new java objects to
// Gecko, and that's what we do here.
const bool resetting = !!mLayerClient;
mLayerClient = layerClient;
layerClient->OnGeckoReady();
if (resetting) {
// Since we are re-linking the new java objects to Gecko, we need
// to get the viewport from the compositor (since the Java copy was
// thrown away) and we do that by setting the first-paint flag.
if (window.mCompositorParent) {
window.mCompositorParent->ForceIsFirstPaint();
}
}
#ifdef MOZ_ANDROID_APZ
MOZ_ASSERT(aNPZC);
auto npzc = NativePanZoomController::LocalRef(
jni::GetGeckoThreadEnv(),
NativePanZoomController::Ref::From(aNPZC));
NPZCSupport::AttachNative(
npzc, mozilla::MakeUnique<NPZCSupport>(&window, npzc));
#endif
}
void OnSizeChanged(int32_t aWindowWidth, int32_t aWindowHeight,
int32_t aScreenWidth, int32_t aScreenHeight)
{
if (aWindowWidth != window.mBounds.width ||
aWindowHeight != window.mBounds.height) {
window.Resize(aWindowWidth, aWindowHeight, /* repaint */ false);
}
if (aScreenWidth == gAndroidScreenBounds.width &&
aScreenHeight == gAndroidScreenBounds.height) {
return;
}
gAndroidScreenBounds.width = aScreenWidth;
gAndroidScreenBounds.height = aScreenHeight;
if (!XRE_IsParentProcess() &&
!Preferences::GetBool("browser.tabs.remote.desktopbehavior",
false)) {
return;
}
// Tell the content process the new screen size.
nsTArray<ContentParent*> cplist;
ContentParent::GetAll(cplist);
for (uint32_t i = 0; i < cplist.Length(); ++i) {
Unused << cplist[i]->SendScreenSizeChanged(gAndroidScreenBounds);
}
if (gContentCreationNotifier) {
return;
}
// If the content process is not created yet, wait until it's
// created and then tell it the screen size.
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (!obs) {
return;
}
RefPtr<ContentCreationNotifier> notifier = new ContentCreationNotifier;
if (NS_FAILED(obs->AddObserver(notifier, "xpcom-shutdown", false)) ||
NS_FAILED(obs->AddObserver(
notifier, "ipc:content-created", false))) {
return;
}
gContentCreationNotifier = notifier;
}
void CreateCompositor(int32_t aWidth, int32_t aHeight)
{
window.CreateLayerManager(aWidth, aHeight);
mCompositorPaused = false;
OnResumedCompositor(aWidth, aHeight);
}
void PauseCompositor()
{
// The compositor gets paused when the app is about to go into the
// background. While the compositor is paused, we need to ensure that
// no layer tree updates (from draw events) occur, since the compositor
// cannot make a GL context current in order to process updates.
if (window.mCompositorChild) {
window.mCompositorChild->SendPause();
}
mCompositorPaused = true;
}
void SyncPauseCompositor()
{
if (window.mCompositorParent) {
window.mCompositorParent->SchedulePauseOnCompositorThread();
mCompositorPaused = true;
}
}
void SyncResumeCompositor()
{
if (window.mCompositorParent &&
window.mCompositorParent->ScheduleResumeOnCompositorThread()) {
mCompositorPaused = false;
}
}
void SyncResumeResizeCompositor(int32_t aWidth, int32_t aHeight)
{
if (window.mCompositorParent && window.mCompositorParent->
ScheduleResumeOnCompositorThread(aWidth, aHeight)) {
mCompositorPaused = false;
}
}
void SyncInvalidateAndScheduleComposite()
{
if (window.mCompositorParent) {
window.mCompositorParent->InvalidateOnCompositorThread();
window.mCompositorParent->ScheduleRenderOnCompositorThread();
}
}
};
nsWindow::GeckoViewSupport::~GeckoViewSupport()
{
// Disassociate our GeckoEditable instance with our native object.
// OnDestroy will call disposeNative after any pending native calls have
// been made.
MOZ_ASSERT(mEditable);
mEditable->OnViewChange(nullptr);
}
/* static */ void
nsWindow::GeckoViewSupport::Open(const jni::ClassObject::LocalRef& aCls,
GeckoView::Window::Param aWindow,
GeckoView::Param aView,
jni::Object::Param aGLController,
int32_t aWidth, int32_t aHeight)
{
MOZ_ASSERT(NS_IsMainThread());
PROFILER_LABEL("nsWindow", "GeckoViewSupport::Open",
js::ProfileEntry::Category::OTHER);
nsCOMPtr<nsIWindowWatcher> ww = do_GetService(NS_WINDOWWATCHER_CONTRACTID);
MOZ_ASSERT(ww);
nsAdoptingCString url = Preferences::GetCString("toolkit.defaultChromeURI");
if (!url) {
url = NS_LITERAL_CSTRING("chrome://browser/content/browser.xul");
}