bool
ClientTiledPaintedLayer::RenderLowPrecision(nsIntRegion& aInvalidRegion,
const nsIntRegion& aVisibleRegion,
LayerManager::DrawPaintedLayerCallback aCallback,
void* aCallbackData)
{
// Render the low precision buffer, if the visible region is larger than the
// critical display port.
if (!nsIntRegion(LayerIntRect::ToUntyped(mPaintData.mCriticalDisplayPort)).Contains(aVisibleRegion)) {
nsIntRegion oldValidRegion = mContentClient->mLowPrecisionTiledBuffer.GetValidRegion();
oldValidRegion.And(oldValidRegion, aVisibleRegion);
bool updatedBuffer = false;
// If the frame resolution or format have changed, invalidate the buffer
if (mContentClient->mLowPrecisionTiledBuffer.GetFrameResolution() != mPaintData.mResolution ||
mContentClient->mLowPrecisionTiledBuffer.HasFormatChanged()) {
if (!mLowPrecisionValidRegion.IsEmpty()) {
updatedBuffer = true;
}
oldValidRegion.SetEmpty();
mLowPrecisionValidRegion.SetEmpty();
mContentClient->mLowPrecisionTiledBuffer.ResetPaintedAndValidState();
mContentClient->mLowPrecisionTiledBuffer.SetFrameResolution(mPaintData.mResolution);
aInvalidRegion = aVisibleRegion;
}
// Invalidate previously valid content that is no longer visible
if (mPaintData.mLowPrecisionPaintCount == 1) {
mLowPrecisionValidRegion.And(mLowPrecisionValidRegion, aVisibleRegion);
}
mPaintData.mLowPrecisionPaintCount++;
// Remove the valid high-precision region from the invalid low-precision
// region. We don't want to spend time drawing things twice.
aInvalidRegion.Sub(aInvalidRegion, mValidRegion);
TILING_LOG("TILING %p: Progressive paint: low-precision invalid region is %s\n", this, Stringify(aInvalidRegion).c_str());
TILING_LOG("TILING %p: Progressive paint: low-precision old valid region is %s\n", this, Stringify(oldValidRegion).c_str());
if (!aInvalidRegion.IsEmpty()) {
updatedBuffer = mContentClient->mLowPrecisionTiledBuffer.ProgressiveUpdate(
mLowPrecisionValidRegion, aInvalidRegion, oldValidRegion,
&mPaintData, aCallback, aCallbackData);
}
TILING_LOG("TILING %p: Progressive paint: low-precision new valid region is %s\n", this, Stringify(mLowPrecisionValidRegion).c_str());
return updatedBuffer;
}
if (!mLowPrecisionValidRegion.IsEmpty()) {
TILING_LOG("TILING %p: Clearing low-precision buffer\n", this);
// Clear the low precision tiled buffer.
mLowPrecisionValidRegion.SetEmpty();
mContentClient->mLowPrecisionTiledBuffer.ResetPaintedAndValidState();
// Return true here so we send a Painted callback after clearing the valid
// region of the low precision buffer. This allows the shadow buffer's valid
// region to be updated and the associated resources to be freed.
return true;
}
return false;
}
void
ClientTiledPaintedLayer::RenderLayer()
{
LayerManager::DrawPaintedLayerCallback callback =
ClientManager()->GetPaintedLayerCallback();
void *data = ClientManager()->GetPaintedLayerCallbackData();
if (!callback) {
ClientManager()->SetTransactionIncomplete();
return;
}
if (!mContentClient) {
mContentClient = new TiledContentClient(this, ClientManager());
mContentClient->Connect();
ClientManager()->AsShadowForwarder()->Attach(mContentClient, this);
MOZ_ASSERT(mContentClient->GetForwarder());
}
if (mContentClient->mTiledBuffer.HasFormatChanged()) {
mValidRegion = nsIntRegion();
mContentClient->mTiledBuffer.ResetPaintedAndValidState();
}
TILING_LOG("TILING %p: Initial visible region %s\n", this, Stringify(mVisibleRegion).c_str());
TILING_LOG("TILING %p: Initial valid region %s\n", this, Stringify(mValidRegion).c_str());
TILING_LOG("TILING %p: Initial low-precision valid region %s\n", this, Stringify(mLowPrecisionValidRegion).c_str());
nsIntRegion neededRegion = mVisibleRegion;
#ifndef MOZ_IGNORE_PAINT_WILL_RESAMPLE
// This is handled by PadDrawTargetOutFromRegion in TiledContentClient for mobile
if (MayResample()) {
// If we're resampling then bilinear filtering can read up to 1 pixel
// outside of our texture coords. Make the visible region a single rect,
// and pad it out by 1 pixel (restricted to tile boundaries) so that
// we always have valid content or transparent pixels to sample from.
nsIntRect bounds = neededRegion.GetBounds();
nsIntRect wholeTiles = bounds;
wholeTiles.Inflate(nsIntSize(
gfxPlatform::GetPlatform()->GetTileWidth(),
gfxPlatform::GetPlatform()->GetTileHeight()));
nsIntRect padded = bounds;
padded.Inflate(1);
padded.IntersectRect(padded, wholeTiles);
neededRegion = padded;
}
#endif
nsIntRegion invalidRegion;
invalidRegion.Sub(neededRegion, mValidRegion);
if (invalidRegion.IsEmpty()) {
EndPaint();
return;
}
if (!ClientManager()->IsRepeatTransaction()) {
// Only paint the mask layer on the first transaction.
if (GetMaskLayer()) {
ToClientLayer(GetMaskLayer())->RenderLayer();
}
// In some cases we can take a fast path and just be done with it.
if (UseFastPath()) {
TILING_LOG("TILING %p: Taking fast-path\n", this);
mValidRegion = neededRegion;
mContentClient->mTiledBuffer.PaintThebes(mValidRegion, invalidRegion, callback, data);
ClientManager()->Hold(this);
mContentClient->UseTiledLayerBuffer(TiledContentClient::TILED_BUFFER);
return;
}
// For more complex cases we need to calculate a bunch of metrics before we
// can do the paint.
BeginPaint();
if (mPaintData.mPaintFinished) {
return;
}
// Make sure that tiles that fall outside of the visible region or outside of the
// critical displayport are discarded on the first update. Also make sure that we
// only draw stuff inside the critical displayport on the first update.
mValidRegion.And(mValidRegion, neededRegion);
if (!mPaintData.mCriticalDisplayPort.IsEmpty()) {
mValidRegion.And(mValidRegion, LayerIntRect::ToUntyped(mPaintData.mCriticalDisplayPort));
invalidRegion.And(invalidRegion, LayerIntRect::ToUntyped(mPaintData.mCriticalDisplayPort));
}
TILING_LOG("TILING %p: First-transaction valid region %s\n", this, Stringify(mValidRegion).c_str());
TILING_LOG("TILING %p: First-transaction invalid region %s\n", this, Stringify(invalidRegion).c_str());
} else {
if (!mPaintData.mCriticalDisplayPort.IsEmpty()) {
invalidRegion.And(invalidRegion, LayerIntRect::ToUntyped(mPaintData.mCriticalDisplayPort));
}
TILING_LOG("TILING %p: Repeat-transaction invalid region %s\n", this, Stringify(invalidRegion).c_str());
}
nsIntRegion lowPrecisionInvalidRegion;
if (gfxPrefs::UseLowPrecisionBuffer()) {
// Calculate the invalid region for the low precision buffer. Make sure
// to remove the valid high-precision area so we don't double-paint it.
lowPrecisionInvalidRegion.Sub(neededRegion, mLowPrecisionValidRegion);
lowPrecisionInvalidRegion.Sub(lowPrecisionInvalidRegion, mValidRegion);
}
TILING_LOG("TILING %p: Low-precision invalid region %s\n", this, Stringify(lowPrecisionInvalidRegion).c_str());
bool updatedHighPrecision = RenderHighPrecision(invalidRegion,
neededRegion,
callback, data);
if (updatedHighPrecision) {
ClientManager()->Hold(this);
mContentClient->UseTiledLayerBuffer(TiledContentClient::TILED_BUFFER);
if (!mPaintData.mPaintFinished) {
// There is still more high-res stuff to paint, so we're not
// done yet. A subsequent transaction will take care of this.
ClientManager()->SetRepeatTransaction();
return;
}
}
// If there is nothing to draw in low-precision, then we're done.
if (lowPrecisionInvalidRegion.IsEmpty()) {
EndPaint();
return;
}
if (updatedHighPrecision) {
// If there are low precision updates, but we just did some high-precision
// updates, then mark the paint as unfinished and request a repeat transaction.
// This is so that we don't perform low-precision updates in the same transaction
// as high-precision updates.
TILING_LOG("TILING %p: Scheduling repeat transaction for low-precision painting\n", this);
ClientManager()->SetRepeatTransaction();
mPaintData.mLowPrecisionPaintCount = 1;
mPaintData.mPaintFinished = false;
return;
}
bool updatedLowPrecision = RenderLowPrecision(lowPrecisionInvalidRegion,
neededRegion,
callback, data);
if (updatedLowPrecision) {
ClientManager()->Hold(this);
mContentClient->UseTiledLayerBuffer(TiledContentClient::LOW_PRECISION_TILED_BUFFER);
if (!mPaintData.mPaintFinished) {
// There is still more low-res stuff to paint, so we're not
// done yet. A subsequent transaction will take care of this.
ClientManager()->SetRepeatTransaction();
return;
}
}
// If we get here, we've done all the high- and low-precision
// paints we wanted to do, so we can finish the paint and chill.
EndPaint();
}
void
ClientTiledPaintedLayer::BeginPaint()
{
mPaintData.mLowPrecisionPaintCount = 0;
mPaintData.mPaintFinished = false;
mPaintData.mCompositionBounds.SetEmpty();
mPaintData.mCriticalDisplayPort.SetEmpty();
if (!GetBaseTransform().Is2D()) {
// Give up if there is a complex CSS transform on the layer. We might
// eventually support these but for now it's too complicated to handle
// given that it's a pretty rare scenario.
return;
}
// Get the metrics of the nearest scrollable layer and the nearest layer
// with a displayport.
LayerMetricsWrapper scrollAncestor;
LayerMetricsWrapper displayPortAncestor;
GetAncestorLayers(&scrollAncestor, &displayPortAncestor);
if (!displayPortAncestor || !scrollAncestor) {
// No displayport or scroll ancestor, so we can't do progressive rendering.
#if defined(MOZ_WIDGET_ANDROID) || defined(MOZ_B2G)
// Both Android and b2g are guaranteed to have a displayport set, so this
// should never happen.
NS_WARNING("Tiled PaintedLayer with no scrollable container ancestor");
#endif
return;
}
TILING_LOG("TILING %p: Found scrollAncestor %p and displayPortAncestor %p\n", this,
scrollAncestor.GetLayer(), displayPortAncestor.GetLayer());
const FrameMetrics& scrollMetrics = scrollAncestor.Metrics();
const FrameMetrics& displayportMetrics = displayPortAncestor.Metrics();
// Calculate the transform required to convert ParentLayer space of our
// display port ancestor to the Layer space of this layer.
gfx::Matrix4x4 transformDisplayPortToLayer =
GetTransformToAncestorsParentLayer(this, displayPortAncestor);
transformDisplayPortToLayer.Invert();
// Compute the critical display port that applies to this layer in the
// LayoutDevice space of this layer.
ParentLayerRect criticalDisplayPort =
(displayportMetrics.GetCriticalDisplayPort() * displayportMetrics.GetZoom())
+ displayportMetrics.mCompositionBounds.TopLeft();
mPaintData.mCriticalDisplayPort = RoundedOut(
ApplyParentLayerToLayerTransform(transformDisplayPortToLayer, criticalDisplayPort));
TILING_LOG("TILING %p: Critical displayport %s\n", this, Stringify(mPaintData.mCriticalDisplayPort).c_str());
// Store the resolution from the displayport ancestor layer. Because this is Gecko-side,
// before any async transforms have occurred, we can use the zoom for this.
mPaintData.mResolution = displayportMetrics.GetZoom();
TILING_LOG("TILING %p: Resolution %f\n", this, mPaintData.mResolution.scale);
// Store the applicable composition bounds in this layer's Layer units.
mPaintData.mTransformToCompBounds =
GetTransformToAncestorsParentLayer(this, scrollAncestor);
gfx::Matrix4x4 transformToBounds = mPaintData.mTransformToCompBounds;
transformToBounds.Invert();
mPaintData.mCompositionBounds = ApplyParentLayerToLayerTransform(
transformToBounds, scrollMetrics.mCompositionBounds);
TILING_LOG("TILING %p: Composition bounds %s\n", this, Stringify(mPaintData.mCompositionBounds).c_str());
// Calculate the scroll offset since the last transaction
mPaintData.mScrollOffset = displayportMetrics.GetScrollOffset() * displayportMetrics.GetZoom();
TILING_LOG("TILING %p: Scroll offset %s\n", this, Stringify(mPaintData.mScrollOffset).c_str());
}
void
APZEventState::ProcessTouchEvent(const WidgetTouchEvent& aEvent,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId,
nsEventStatus aApzResponse,
nsEventStatus aContentResponse)
{
if (aEvent.mMessage == eTouchStart && aEvent.mTouches.Length() > 0) {
mActiveElementManager->SetTargetElement(aEvent.mTouches[0]->GetTarget());
mLastTouchIdentifier = aEvent.mTouches[0]->Identifier();
}
bool isTouchPrevented = aContentResponse == nsEventStatus_eConsumeNoDefault;
bool sentContentResponse = false;
APZES_LOG("Handling event type %d\n", aEvent.mMessage);
switch (aEvent.mMessage) {
case eTouchStart: {
mTouchEndCancelled = false;
sentContentResponse = SendPendingTouchPreventedResponse(false);
// sentContentResponse can be true here if we get two TOUCH_STARTs in a row
// and just responded to the first one.
// We're about to send a response back to APZ, but we should only do it
// for events that went through APZ (which should be all of them).
MOZ_ASSERT(aEvent.mFlags.mHandledByAPZ);
if (isTouchPrevented) {
mContentReceivedInputBlockCallback(aGuid, aInputBlockId, isTouchPrevented);
sentContentResponse = true;
} else {
APZES_LOG("Event not prevented; pending response for %" PRIu64 " %s\n",
aInputBlockId, Stringify(aGuid).c_str());
mPendingTouchPreventedResponse = true;
mPendingTouchPreventedGuid = aGuid;
mPendingTouchPreventedBlockId = aInputBlockId;
}
break;
}
case eTouchEnd:
if (isTouchPrevented) {
mTouchEndCancelled = true;
mEndTouchIsClick = false;
}
MOZ_FALLTHROUGH;
case eTouchCancel:
mActiveElementManager->HandleTouchEndEvent(mEndTouchIsClick);
MOZ_FALLTHROUGH;
case eTouchMove: {
if (mPendingTouchPreventedResponse) {
MOZ_ASSERT(aGuid == mPendingTouchPreventedGuid);
}
sentContentResponse = SendPendingTouchPreventedResponse(isTouchPrevented);
break;
}
default:
NS_WARNING("Unknown touch event type");
}
if (sentContentResponse &&
aApzResponse == nsEventStatus_eConsumeDoDefault &&
gfxPrefs::PointerEventsEnabled()) {
WidgetTouchEvent cancelEvent(aEvent);
cancelEvent.mMessage = eTouchCancel;
cancelEvent.mFlags.mCancelable = false; // mMessage != eTouchCancel;
for (uint32_t i = 0; i < cancelEvent.mTouches.Length(); ++i) {
if (mozilla::dom::Touch* touch = cancelEvent.mTouches[i]) {
touch->convertToPointer = true;
}
}
nsEventStatus status;
cancelEvent.mWidget->DispatchEvent(&cancelEvent, status);
}
}
void UpdateStatusLines()
{
std::string rule = currlayer->algo->getrule();
status1 = "Pattern=";
if (currlayer->dirty) {
// display asterisk to indicate pattern has been modified
status1 += "*";
}
status1 += currlayer->currname;
status1 += widescreen ? large_algo_prefix : small_algo_prefix;
status1 += GetAlgoName(currlayer->algtype);
status1 += widescreen ? large_rule_prefix : small_rule_prefix;
status1 += rule;
// show rule name if one exists and is not same as rule
// (best NOT to remove any suffix like ":T100,200" in case we allow
// users to name "B3/S23:T100,200" as "Life on torus")
std::string rulename = GetRuleName(rule);
if (!rulename.empty() && rulename != rule) {
status1 += " [";
status1 += rulename;
status1 += "]";
}
char scalestr[32];
int mag = currlayer->view->getmag();
if (mag < 0) {
sprintf(scalestr, "2^%d:1", -mag);
} else {
sprintf(scalestr, "1:%d", 1 << mag);
}
char stepstr[32];
if (currlayer->currexpo < 0) {
// show delay in secs
sprintf(stepstr, "Delay=%gs", (double)GetCurrentDelay() / 1000.0);
} else {
sprintf(stepstr, "Step=%d^%d", currlayer->currbase, currlayer->currexpo);
}
status2 = widescreen ? large_gen_prefix : small_gen_prefix;
if (nopattupdate) {
status2 += "0";
} else {
status2 += Stringify(currlayer->algo->getGeneration());
}
status2 += widescreen ? large_pop_prefix : small_pop_prefix;
if (nopattupdate) {
status2 += "0";
} else {
bigint popcount = currlayer->algo->getPopulation();
if (popcount.sign() < 0) {
// getPopulation returns -1 if it can't be calculated
status2 += "?";
} else {
status2 += Stringify(popcount);
}
}
status2 += widescreen ? large_scale_prefix : small_scale_prefix;
status2 += scalestr;
status2 += widescreen ? large_step_prefix : small_step_prefix;
status2 += stepstr;
status2 += widescreen ? large_xy_prefix : small_xy_prefix;
#ifdef WEB_GUI
// in web app we show the cursor's current cell location,
// or nothing if the cursor is outside the viewport (ie. showxy is false)
if (showxy) {
bigint xo, yo;
bigint xpos = currx; xpos -= currlayer->originx;
bigint ypos = curry; ypos -= currlayer->originy;
if (mathcoords) {
// Y values increase upwards
bigint temp = 0;
temp -= ypos;
ypos = temp;
}
status2 += Stringify(xpos);
status2 += " ";
status2 += Stringify(ypos);
}
#else
// in iOS and Android apps we show location of the cell in middle of viewport
status2 += Stringify(currlayer->view->x);
status2 += " ";
status2 += Stringify(currlayer->view->y);
#endif
}
void
ClientSingleTiledLayerBuffer::PaintThebes(const nsIntRegion& aNewValidRegion,
const nsIntRegion& aPaintRegion,
const nsIntRegion& aDirtyRegion,
LayerManager::DrawPaintedLayerCallback aCallback,
void* aCallbackData,
bool aIsProgressive)
{
mWasLastPaintProgressive = aIsProgressive;
// Compare layer valid region size to current backbuffer size, discard if not matching.
gfx::IntSize size = aNewValidRegion.GetBounds().Size();
gfx::IntPoint origin = aNewValidRegion.GetBounds().TopLeft();
nsIntRegion paintRegion = aPaintRegion;
RefPtr<TextureClient> discardedFrontBuffer = nullptr;
RefPtr<TextureClient> discardedFrontBufferOnWhite = nullptr;
nsIntRegion discardedValidRegion;
if (mSize != size ||
mTilingOrigin != origin) {
discardedFrontBuffer = mTile.mFrontBuffer;
discardedFrontBufferOnWhite = mTile.mFrontBufferOnWhite;
discardedValidRegion = mValidRegion;
TILING_LOG("TILING %p: Single-tile valid region changed. Discarding buffers.\n", &mPaintedLayer)
;
ResetPaintedAndValidState();
mSize = size;
mTilingOrigin = origin;
paintRegion = aNewValidRegion;
}
SurfaceMode mode;
gfxContentType content = GetContentType(&mode);
mFormat = gfxPlatform::GetPlatform()->OptimalFormatForContent(content);
if (mTile.IsPlaceholderTile()) {
mTile.SetTextureAllocator(this);
}
// The dirty region relative to the top-left of the tile.
nsIntRegion tileDirtyRegion = paintRegion.MovedBy(-mTilingOrigin);
nsIntRegion extraPainted;
RefPtr<TextureClient> backBufferOnWhite;
RefPtr<TextureClient> backBuffer =
mTile.GetBackBuffer(mCompositableClient,
tileDirtyRegion,
content, mode,
extraPainted,
&backBufferOnWhite);
mTile.mUpdateRect = tileDirtyRegion.GetBounds().Union(extraPainted.GetBounds());
extraPainted.MoveBy(mTilingOrigin);
extraPainted.And(extraPainted, aNewValidRegion);
mPaintedRegion.OrWith(paintRegion);
mPaintedRegion.OrWith(extraPainted);
if (!backBuffer) {
return;
}
RefPtr<gfx::DrawTarget> dt = backBuffer->BorrowDrawTarget();
RefPtr<gfx::DrawTarget> dtOnWhite;
if (backBufferOnWhite) {
dtOnWhite = backBufferOnWhite->BorrowDrawTarget();
}
if (mode != SurfaceMode::SURFACE_OPAQUE) {
for (auto iter = tileDirtyRegion.RectIter(); !iter.Done(); iter.Next()) {
const gfx::IntRect& rect = iter.Get();
if (dtOnWhite) {
dt->FillRect(gfx::Rect(rect.x, rect.y, rect.width, rect.height),
gfx::ColorPattern(gfx::Color(0.0, 0.0, 0.0, 1.0)));
dtOnWhite->FillRect(gfx::Rect(rect.x, rect.y, rect.width, rect.height),
gfx::ColorPattern(gfx::Color(1.0, 1.0, 1.0, 1.0)));
} else {
dt->ClearRect(gfx::Rect(rect.x, rect.y, rect.width, rect.height));
}
}
}
// If the old frontbuffer was discarded then attempt to copy what we
// can from it to the new backbuffer.
if (discardedFrontBuffer) {
nsIntRegion copyableRegion;
copyableRegion.And(aNewValidRegion, discardedValidRegion);
copyableRegion.SubOut(aDirtyRegion);
if (!copyableRegion.IsEmpty()) {
TextureClientAutoLock frontLock(discardedFrontBuffer,
OpenMode::OPEN_READ);
if (frontLock.Succeeded()) {
for (auto iter = copyableRegion.RectIter(); !iter.Done(); iter.Next()) {
const gfx::IntRect rect = iter.Get() - discardedValidRegion.GetBounds().TopLeft();
const gfx::IntPoint dest = iter.Get().TopLeft() - mTilingOrigin;
discardedFrontBuffer->CopyToTextureClient(backBuffer, &rect, &dest);
}
}
if (discardedFrontBufferOnWhite && backBufferOnWhite) {
TextureClientAutoLock frontOnWhiteLock(discardedFrontBufferOnWhite,
OpenMode::OPEN_READ);
if (frontOnWhiteLock.Succeeded()) {
for (auto iter = copyableRegion.RectIter(); !iter.Done(); iter.Next()) {
const gfx::IntRect rect = iter.Get() - discardedValidRegion.GetBounds().TopLeft();
const gfx::IntPoint dest = iter.Get().TopLeft() - mTilingOrigin;
discardedFrontBufferOnWhite->CopyToTextureClient(backBufferOnWhite,
&rect, &dest);
}
}
}
TILING_LOG("TILING %p: Region copied from discarded frontbuffer %s\n", &mPaintedLayer, Stringify(copyableRegion).c_str());
// We don't need to repaint valid content that was just copied.
paintRegion.SubOut(copyableRegion);
}
}
if (dtOnWhite) {
dt = gfx::Factory::CreateDualDrawTarget(dt, dtOnWhite);
dtOnWhite = nullptr;
}
{
RefPtr<gfxContext> ctx = gfxContext::CreateOrNull(dt);
if (!ctx) {
gfxDevCrash(gfx::LogReason::InvalidContext) << "SingleTiledContextClient context problem " << gfx::hexa(dt);
return;
}
ctx->SetMatrix(ctx->CurrentMatrix().Translate(-mTilingOrigin.x, -mTilingOrigin.y));
aCallback(&mPaintedLayer, ctx, paintRegion, paintRegion, DrawRegionClip::DRAW, nsIntRegion(), aCallbackData);
}
// Mark the area we just drew into the back buffer as invalid in the front buffer as they're
// now out of sync.
mTile.mInvalidFront.OrWith(tileDirtyRegion);
// The new buffer is now validated, remove the dirty region from it.
mTile.mInvalidBack.SubOut(tileDirtyRegion);
dt = nullptr;
mTile.Flip();
UnlockTile(mTile);
if (backBuffer->HasIntermediateBuffer()) {
// If our new buffer has an internal buffer, we don't want to keep another
// TextureClient around unnecessarily, so discard the back-buffer.
mTile.DiscardBackBuffer();
}
mValidRegion = aNewValidRegion;
mLastPaintSurfaceMode = mode;
mLastPaintContentType = content;
}
void
APZEventState::ProcessTouchEvent(const WidgetTouchEvent& aEvent,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId,
nsEventStatus aApzResponse,
nsEventStatus aContentResponse)
{
if (aEvent.mMessage == eTouchStart && aEvent.mTouches.Length() > 0) {
mActiveElementManager->SetTargetElement(aEvent.mTouches[0]->GetTarget());
}
bool isTouchPrevented = aContentResponse == nsEventStatus_eConsumeNoDefault;
bool sentContentResponse = false;
APZES_LOG("Handling event type %d\n", aEvent.mMessage);
switch (aEvent.mMessage) {
case eTouchStart: {
mTouchEndCancelled = false;
sentContentResponse = SendPendingTouchPreventedResponse(false);
// sentContentResponse can be true here if we get two TOUCH_STARTs in a row
// and just responded to the first one.
if (!aEvent.mFlags.mHandledByAPZ) {
// This condition being true means this touchstart is synthetic and is
// coming from TabParent.injectTouchEvent.
// Since APZ doesn't know about it we don't want to send a response for
// this block; we want to just skip over it from the point of view of
// prevent-default notifications.
APZES_LOG("Got a synthetic touch-start!\n");
break;
}
if (isTouchPrevented) {
mContentReceivedInputBlockCallback(aGuid, aInputBlockId, isTouchPrevented);
sentContentResponse = true;
} else {
APZES_LOG("Event not prevented; pending response for %" PRIu64 " %s\n",
aInputBlockId, Stringify(aGuid).c_str());
mPendingTouchPreventedResponse = true;
mPendingTouchPreventedGuid = aGuid;
mPendingTouchPreventedBlockId = aInputBlockId;
}
break;
}
case eTouchEnd:
if (isTouchPrevented) {
mTouchEndCancelled = true;
mEndTouchIsClick = false;
}
MOZ_FALLTHROUGH;
case eTouchCancel:
mActiveElementManager->HandleTouchEndEvent(mEndTouchIsClick);
MOZ_FALLTHROUGH;
case eTouchMove: {
if (mPendingTouchPreventedResponse) {
MOZ_ASSERT(aGuid == mPendingTouchPreventedGuid);
}
sentContentResponse = SendPendingTouchPreventedResponse(isTouchPrevented);
break;
}
default:
NS_WARNING("Unknown touch event type");
}
if (sentContentResponse &&
aApzResponse == nsEventStatus_eConsumeDoDefault &&
gfxPrefs::PointerEventsEnabled()) {
WidgetTouchEvent cancelEvent(aEvent);
cancelEvent.mMessage = eTouchCancel;
cancelEvent.mFlags.mCancelable = false; // mMessage != eTouchCancel;
for (uint32_t i = 0; i < cancelEvent.mTouches.Length(); ++i) {
if (mozilla::dom::Touch* touch = cancelEvent.mTouches[i]) {
touch->convertToPointer = true;
}
}
nsEventStatus status;
cancelEvent.widget->DispatchEvent(&cancelEvent, status);
}
}