NS_IMETHODIMP
nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return NS_OK;
// If mozpasspointerevents is set, then we should allow subdocument content
// to handle events even if we're pointer-events:none.
if (aBuilder->IsForEventDelivery() && !PassPointerEventsToChildren())
return NS_OK;
nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
NS_ENSURE_SUCCESS(rv, rv);
if (!mInnerView)
return NS_OK;
nsFrameLoader* frameLoader = FrameLoader();
if (frameLoader) {
RenderFrameParent* rfp = frameLoader->GetCurrentRemoteFrame();
if (rfp) {
return rfp->BuildDisplayList(aBuilder, this, aDirtyRect, aLists);
}
}
nsIView* subdocView = mInnerView->GetFirstChild();
if (!subdocView)
return NS_OK;
nsCOMPtr<nsIPresShell> presShell = nullptr;
nsIFrame* subdocRootFrame = subdocView->GetFrame();
if (subdocRootFrame) {
presShell = subdocRootFrame->PresContext()->PresShell();
}
// If painting is suppressed in the presshell, we try to look for a better
// presshell to use.
if (!presShell || (presShell->IsPaintingSuppressed() &&
!aBuilder->IsIgnoringPaintSuppression())) {
// During page transition mInnerView will sometimes have two children, the
// first being the new page that may not have any frame, and the second
// being the old page that will probably have a frame.
nsIView* nextView = subdocView->GetNextSibling();
nsIFrame* frame = nullptr;
if (nextView) {
frame = nextView->GetFrame();
}
if (frame) {
nsIPresShell* ps = frame->PresContext()->PresShell();
if (!presShell || (ps && !ps->IsPaintingSuppressed())) {
subdocView = nextView;
subdocRootFrame = frame;
presShell = ps;
}
}
if (!presShell) {
// If we don't have a frame we use this roundabout way to get the pres shell.
if (!mFrameLoader)
return NS_OK;
nsCOMPtr<nsIDocShell> docShell;
mFrameLoader->GetDocShell(getter_AddRefs(docShell));
if (!docShell)
return NS_OK;
docShell->GetPresShell(getter_AddRefs(presShell));
if (!presShell)
return NS_OK;
}
}
nsPresContext* presContext = presShell->GetPresContext();
nsDisplayList childItems;
int32_t parentAPD = PresContext()->AppUnitsPerDevPixel();
int32_t subdocAPD = presContext->AppUnitsPerDevPixel();
nsRect dirty;
if (subdocRootFrame) {
nsIDocument* doc = subdocRootFrame->PresContext()->Document();
nsIContent* root = doc ? doc->GetRootElement() : nullptr;
nsRect displayPort;
if (root && nsLayoutUtils::GetDisplayPort(root, &displayPort)) {
dirty = displayPort;
} else {
// get the dirty rect relative to the root frame of the subdoc
dirty = aDirtyRect + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
}
aBuilder->EnterPresShell(subdocRootFrame, dirty);
}
nsRect subdocBoundsInParentUnits =
mInnerView->GetBounds() + aBuilder->ToReferenceFrame(this);
if (subdocRootFrame) {
rv = subdocRootFrame->
BuildDisplayListForStackingContext(aBuilder, dirty, &childItems);
}
if (!aBuilder->IsForEventDelivery()) {
// If we are going to use a displayzoom below then any items we put under
// it need to have underlying frames from the subdocument. So we need to
// calculate the bounds based on which frame will be the underlying frame
// for the canvas background color item.
nsRect bounds;
if (subdocRootFrame) {
bounds = subdocBoundsInParentUnits.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
} else {
bounds = subdocBoundsInParentUnits;
}
// If we are in print preview/page layout we want to paint the grey
// background behind the page, not the canvas color. The canvas color gets
// painted on the page itself.
if (nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
rv = presShell->AddPrintPreviewBackgroundItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds);
} else {
// Add the canvas background color to the bottom of the list. This
// happens after we've built the list so that AddCanvasBackgroundColorItem
// can monkey with the contents if necessary.
uint32_t flags = nsIPresShell::FORCE_DRAW;
rv = presShell->AddCanvasBackgroundColorItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds, NS_RGBA(0,0,0,0), flags);
}
}
bool addedLayer = false;
if (subdocRootFrame && parentAPD != subdocAPD) {
NS_WARN_IF_FALSE(!addedLayer,
"Two container layers have been added. "
"Performance may suffer.");
addedLayer = true;
nsDisplayZoom* zoomItem =
new (aBuilder) nsDisplayZoom(aBuilder, subdocRootFrame, &childItems,
subdocAPD, parentAPD,
nsDisplayOwnLayer::GENERATE_SUBDOC_INVALIDATIONS);
childItems.AppendToTop(zoomItem);
}
nsIScrollableFrame *sf = presShell->GetRootScrollFrameAsScrollable();
if (!addedLayer &&
(presContext->IsRootContentDocument() ||
(sf && sf->IsScrollingActive()))) {
// We always want top level content documents to be in their own layer.
nsDisplayOwnLayer* layerItem = new (aBuilder) nsDisplayOwnLayer(
aBuilder, subdocRootFrame ? subdocRootFrame : this,
&childItems, nsDisplayOwnLayer::GENERATE_SUBDOC_INVALIDATIONS);
childItems.AppendToTop(layerItem);
}
if (subdocRootFrame) {
aBuilder->LeavePresShell(subdocRootFrame, dirty);
}
if (ShouldClipSubdocument()) {
nsDisplayClip* item =
new (aBuilder) nsDisplayClip(aBuilder, this, &childItems,
subdocBoundsInParentUnits);
// Clip children to the child root frame's rectangle
childItems.AppendToTop(item);
}
if (mIsInline) {
WrapReplacedContentForBorderRadius(aBuilder, &childItems, aLists);
} else {
aLists.Content()->AppendToTop(&childItems);
}
// delete childItems in case of OOM
childItems.DeleteAll();
return rv;
}
void
nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return;
nsFrameLoader* frameLoader = FrameLoader();
RenderFrameParent* rfp = nullptr;
if (frameLoader) {
rfp = frameLoader->GetCurrentRemoteFrame();
}
// If we are pointer-events:none then we don't need to HitTest background
bool pointerEventsNone = StyleVisibility()->mPointerEvents == NS_STYLE_POINTER_EVENTS_NONE;
if (!aBuilder->IsForEventDelivery() || !pointerEventsNone) {
nsDisplayListCollection decorations;
DisplayBorderBackgroundOutline(aBuilder, decorations);
if (rfp) {
// Wrap background colors of <iframe>s with remote subdocuments in their
// own layer so we generate a ColorLayer. This is helpful for optimizing
// compositing; we can skip compositing the ColorLayer when the
// remote content is opaque.
WrapBackgroundColorInOwnLayer(aBuilder, this, decorations.BorderBackground());
}
decorations.MoveTo(aLists);
}
bool passPointerEventsToChildren = false;
if (aBuilder->IsForEventDelivery()) {
passPointerEventsToChildren = PassPointerEventsToChildren();
// If mozpasspointerevents is set, then we should allow subdocument content
// to handle events even if we're pointer-events:none.
if (pointerEventsNone && !passPointerEventsToChildren) {
return;
}
}
// If we're passing pointer events to children then we have to descend into
// subdocuments no matter what, to determine which parts are transparent for
// elementFromPoint.
if (!mInnerView ||
(!aBuilder->GetDescendIntoSubdocuments() && !passPointerEventsToChildren)) {
return;
}
if (rfp) {
rfp->BuildDisplayList(aBuilder, this, aDirtyRect, aLists);
return;
}
nsView* subdocView = mInnerView->GetFirstChild();
if (!subdocView)
return;
nsCOMPtr<nsIPresShell> presShell = nullptr;
nsIFrame* subdocRootFrame = subdocView->GetFrame();
if (subdocRootFrame) {
presShell = subdocRootFrame->PresContext()->PresShell();
}
// If painting is suppressed in the presshell, we try to look for a better
// presshell to use.
if (!presShell || (presShell->IsPaintingSuppressed() &&
!aBuilder->IsIgnoringPaintSuppression())) {
// During page transition mInnerView will sometimes have two children, the
// first being the new page that may not have any frame, and the second
// being the old page that will probably have a frame.
nsView* nextView = subdocView->GetNextSibling();
nsIFrame* frame = nullptr;
if (nextView) {
frame = nextView->GetFrame();
}
if (frame) {
nsIPresShell* ps = frame->PresContext()->PresShell();
if (!presShell || (ps && !ps->IsPaintingSuppressed())) {
subdocView = nextView;
subdocRootFrame = frame;
presShell = ps;
}
}
if (!presShell) {
// If we don't have a frame we use this roundabout way to get the pres shell.
if (!mFrameLoader)
return;
nsCOMPtr<nsIDocShell> docShell;
mFrameLoader->GetDocShell(getter_AddRefs(docShell));
if (!docShell)
return;
presShell = docShell->GetPresShell();
if (!presShell)
return;
}
}
nsPresContext* presContext = presShell->GetPresContext();
int32_t parentAPD = PresContext()->AppUnitsPerDevPixel();
int32_t subdocAPD = presContext->AppUnitsPerDevPixel();
nsRect dirty;
bool haveDisplayPort = false;
bool ignoreViewportScrolling = false;
nsIFrame* savedIgnoreScrollFrame = nullptr;
if (subdocRootFrame) {
// get the dirty rect relative to the root frame of the subdoc
dirty = aDirtyRect + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
if (nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame()) {
// for root content documents we want the base to be the composition bounds
nsRect displayportBase = presContext->IsRootContentDocument() ?
nsRect(nsPoint(0,0), nsLayoutUtils::CalculateCompositionSizeForFrame(rootScrollFrame)) :
dirty.Intersect(nsRect(nsPoint(0,0), subdocRootFrame->GetSize()));
nsRect displayPort;
if (nsLayoutUtils::GetOrMaybeCreateDisplayPort(
*aBuilder, rootScrollFrame, displayportBase, &displayPort)) {
haveDisplayPort = true;
dirty = displayPort;
}
ignoreViewportScrolling = presShell->IgnoringViewportScrolling();
if (ignoreViewportScrolling) {
savedIgnoreScrollFrame = aBuilder->GetIgnoreScrollFrame();
aBuilder->SetIgnoreScrollFrame(rootScrollFrame);
}
}
aBuilder->EnterPresShell(subdocRootFrame, dirty);
}
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
if (ShouldClipSubdocument()) {
clipState.ClipContainingBlockDescendantsToContentBox(aBuilder, this);
}
nsIScrollableFrame *sf = presShell->GetRootScrollFrameAsScrollable();
bool constructResolutionItem = subdocRootFrame &&
(presShell->GetXResolution() != 1.0 || presShell->GetYResolution() != 1.0);
bool constructZoomItem = subdocRootFrame && parentAPD != subdocAPD;
bool needsOwnLayer = constructResolutionItem || constructZoomItem ||
haveDisplayPort ||
presContext->IsRootContentDocument() || (sf && sf->IsScrollingActive());
// Don't let in fixed pos propagate down to child documents. This makes
// it a little less effective but doesn't regress an important case of a
// child document being in a fixed pos element where we would do no occlusion
// at all if we let it propagate down.
nsDisplayListBuilder::AutoInFixedPosSetter
buildingInFixedPos(aBuilder, false);
nsDisplayList childItems;
{
DisplayListClipState::AutoSaveRestore nestedClipState(aBuilder);
if (needsOwnLayer) {
// Clear current clip. There's no point in propagating it down, since
// the layer we will construct will be clipped by the current clip.
// In fact for nsDisplayZoom propagating it down would be incorrect since
// nsDisplayZoom changes the meaning of appunits.
nestedClipState.Clear();
}
if (subdocRootFrame) {
nsDisplayListBuilder::AutoCurrentScrollParentIdSetter idSetter(
aBuilder,
ignoreViewportScrolling && subdocRootFrame->GetContent()
? nsLayoutUtils::FindOrCreateIDFor(subdocRootFrame->GetContent())
: aBuilder->GetCurrentScrollParentId());
aBuilder->SetAncestorHasTouchEventHandler(false);
subdocRootFrame->
BuildDisplayListForStackingContext(aBuilder, dirty, &childItems);
}
if (!aBuilder->IsForEventDelivery()) {
// If we are going to use a displayzoom below then any items we put under
// it need to have underlying frames from the subdocument. So we need to
// calculate the bounds based on which frame will be the underlying frame
// for the canvas background color item.
nsRect bounds = GetContentRectRelativeToSelf() +
aBuilder->ToReferenceFrame(this);
if (subdocRootFrame) {
bounds = bounds.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
}
// If we are in print preview/page layout we want to paint the grey
// background behind the page, not the canvas color. The canvas color gets
// painted on the page itself.
if (nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
presShell->AddPrintPreviewBackgroundItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds);
} else {
// Add the canvas background color to the bottom of the list. This
// happens after we've built the list so that AddCanvasBackgroundColorItem
// can monkey with the contents if necessary.
uint32_t flags = nsIPresShell::FORCE_DRAW;
presShell->AddCanvasBackgroundColorItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds, NS_RGBA(0,0,0,0), flags);
}
}
}
// Generate a resolution and/or zoom item if needed. If one or both of those is
// created, we don't need to create a separate nsDisplaySubDocument.
uint32_t flags = nsDisplayOwnLayer::GENERATE_SUBDOC_INVALIDATIONS;
// If ignoreViewportScrolling is true then the top most layer we create here
// is going to become the scrollable layer for the root scroll frame, so we
// want to add nsDisplayOwnLayer::GENERATE_SCROLLABLE_LAYER to whatever layer
// becomes the topmost. We do this below.
if (constructZoomItem) {
uint32_t zoomFlags = flags;
if (ignoreViewportScrolling && !constructResolutionItem) {
zoomFlags |= nsDisplayOwnLayer::GENERATE_SCROLLABLE_LAYER;
}
nsDisplayZoom* zoomItem =
new (aBuilder) nsDisplayZoom(aBuilder, subdocRootFrame, &childItems,
subdocAPD, parentAPD, zoomFlags);
childItems.AppendToTop(zoomItem);
needsOwnLayer = false;
}
// Wrap the zoom item in the resolution item if we have both because we want the
// resolution scale applied on top of the app units per dev pixel conversion.
if (ignoreViewportScrolling) {
flags |= nsDisplayOwnLayer::GENERATE_SCROLLABLE_LAYER;
}
if (constructResolutionItem) {
nsDisplayResolution* resolutionItem =
new (aBuilder) nsDisplayResolution(aBuilder, subdocRootFrame, &childItems,
flags);
childItems.AppendToTop(resolutionItem);
needsOwnLayer = false;
}
if (needsOwnLayer) {
// We always want top level content documents to be in their own layer.
nsDisplaySubDocument* layerItem = new (aBuilder) nsDisplaySubDocument(
aBuilder, subdocRootFrame ? subdocRootFrame : this,
&childItems, flags);
childItems.AppendToTop(layerItem);
}
if (subdocRootFrame) {
aBuilder->LeavePresShell(subdocRootFrame, dirty);
if (ignoreViewportScrolling) {
aBuilder->SetIgnoreScrollFrame(savedIgnoreScrollFrame);
}
}
if (aBuilder->IsForImageVisibility()) {
// We don't add the childItems to the return list as we're dealing with them here.
presShell->RebuildImageVisibility(childItems);
childItems.DeleteAll();
} else {
aLists.Content()->AppendToTop(&childItems);
}
}
void
nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return;
nsFrameLoader* frameLoader = FrameLoader();
RenderFrameParent* rfp = nullptr;
if (frameLoader) {
rfp = frameLoader->GetCurrentRenderFrame();
}
// If we are pointer-events:none then we don't need to HitTest background
bool pointerEventsNone =
StyleUserInterface()->mPointerEvents == NS_STYLE_POINTER_EVENTS_NONE;
if (!aBuilder->IsForEventDelivery() || !pointerEventsNone) {
nsDisplayListCollection decorations;
DisplayBorderBackgroundOutline(aBuilder, decorations);
if (rfp) {
// Wrap background colors of <iframe>s with remote subdocuments in their
// own layer so we generate a ColorLayer. This is helpful for optimizing
// compositing; we can skip compositing the ColorLayer when the
// remote content is opaque.
WrapBackgroundColorInOwnLayer(aBuilder, this, decorations.BorderBackground());
}
decorations.MoveTo(aLists);
}
if (aBuilder->IsForEventDelivery() && pointerEventsNone) {
return;
}
// If we're passing pointer events to children then we have to descend into
// subdocuments no matter what, to determine which parts are transparent for
// hit-testing or event regions.
bool needToDescend = aBuilder->GetDescendIntoSubdocuments();
if (!mInnerView || !needToDescend) {
return;
}
if (rfp) {
rfp->BuildDisplayList(aBuilder, this, aDirtyRect, aLists);
return;
}
nsCOMPtr<nsIPresShell> presShell =
GetSubdocumentPresShellForPainting(
aBuilder->IsIgnoringPaintSuppression() ? IGNORE_PAINT_SUPPRESSION : 0);
if (!presShell) {
return;
}
nsIFrame* subdocRootFrame = presShell->GetRootFrame();
nsPresContext* presContext = presShell->GetPresContext();
int32_t parentAPD = PresContext()->AppUnitsPerDevPixel();
int32_t subdocAPD = presContext->AppUnitsPerDevPixel();
nsRect dirty;
bool haveDisplayPort = false;
bool ignoreViewportScrolling = false;
nsIFrame* savedIgnoreScrollFrame = nullptr;
if (subdocRootFrame) {
// get the dirty rect relative to the root frame of the subdoc
dirty = aDirtyRect + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ScaleToOtherAppUnitsRoundOut(parentAPD, subdocAPD);
if (nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame()) {
nsIScrollableFrame* rootScrollableFrame = presShell->GetRootScrollFrameAsScrollable();
MOZ_ASSERT(rootScrollableFrame);
// Use a copy, so the dirty rect doesn't get modified to the display port.
nsRect copy = dirty;
haveDisplayPort = rootScrollableFrame->DecideScrollableLayer(aBuilder,
©, /* aAllowCreateDisplayPort = */ true);
if (!gfxPrefs::LayoutUseContainersForRootFrames()) {
haveDisplayPort = false;
}
ignoreViewportScrolling = presShell->IgnoringViewportScrolling();
if (ignoreViewportScrolling) {
savedIgnoreScrollFrame = aBuilder->GetIgnoreScrollFrame();
aBuilder->SetIgnoreScrollFrame(rootScrollFrame);
}
}
aBuilder->EnterPresShell(subdocRootFrame, pointerEventsNone);
} else {
dirty = aDirtyRect;
}
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
if (ShouldClipSubdocument()) {
clipState.ClipContainingBlockDescendantsToContentBox(aBuilder, this);
}
nsIScrollableFrame *sf = presShell->GetRootScrollFrameAsScrollable();
bool constructResolutionItem = subdocRootFrame &&
(presShell->GetResolution() != 1.0);
bool constructZoomItem = subdocRootFrame && parentAPD != subdocAPD;
bool needsOwnLayer = false;
if (constructResolutionItem ||
constructZoomItem ||
haveDisplayPort ||
presContext->IsRootContentDocument() ||
(sf && sf->IsScrollingActive(aBuilder)))
{
needsOwnLayer = true;
}
if (!needsOwnLayer && aBuilder->IsBuildingLayerEventRegions() &&
nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(presShell))
{
needsOwnLayer = true;
}
nsDisplayList childItems;
{
DisplayListClipState::AutoSaveRestore nestedClipState(aBuilder);
if (needsOwnLayer) {
// Clear current clip. There's no point in propagating it down, since
// the layer we will construct will be clipped by the current clip.
// In fact for nsDisplayZoom propagating it down would be incorrect since
// nsDisplayZoom changes the meaning of appunits.
nestedClipState.EnterStackingContextContents(true);
}
if (subdocRootFrame) {
nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
nsDisplayListBuilder::AutoCurrentScrollParentIdSetter idSetter(
aBuilder,
ignoreViewportScrolling && rootScrollFrame && rootScrollFrame->GetContent()
? nsLayoutUtils::FindOrCreateIDFor(rootScrollFrame->GetContent())
: aBuilder->GetCurrentScrollParentId());
aBuilder->SetAncestorHasApzAwareEventHandler(false);
subdocRootFrame->
BuildDisplayListForStackingContext(aBuilder, dirty, &childItems);
}
if (!aBuilder->IsForEventDelivery()) {
// If we are going to use a displayzoom below then any items we put under
// it need to have underlying frames from the subdocument. So we need to
// calculate the bounds based on which frame will be the underlying frame
// for the canvas background color item.
nsRect bounds = GetContentRectRelativeToSelf() +
aBuilder->ToReferenceFrame(this);
if (subdocRootFrame) {
bounds = bounds.ScaleToOtherAppUnitsRoundOut(parentAPD, subdocAPD);
}
// If we are in print preview/page layout we want to paint the grey
// background behind the page, not the canvas color. The canvas color gets
// painted on the page itself.
if (nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
presShell->AddPrintPreviewBackgroundItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds);
} else {
// Invoke AutoBuildingDisplayList to ensure that the correct dirty rect
// is used to compute the visible rect if AddCanvasBackgroundColorItem
// creates a display item.
nsIFrame* frame = subdocRootFrame ? subdocRootFrame : this;
nsDisplayListBuilder::AutoBuildingDisplayList
building(aBuilder, frame, dirty, true);
// Add the canvas background color to the bottom of the list. This
// happens after we've built the list so that AddCanvasBackgroundColorItem
// can monkey with the contents if necessary.
uint32_t flags = nsIPresShell::FORCE_DRAW;
presShell->AddCanvasBackgroundColorItem(
*aBuilder, childItems, frame, bounds, NS_RGBA(0,0,0,0), flags);
}
}
}
if (subdocRootFrame) {
aBuilder->LeavePresShell(subdocRootFrame, &childItems);
if (ignoreViewportScrolling) {
aBuilder->SetIgnoreScrollFrame(savedIgnoreScrollFrame);
}
}
// Generate a resolution and/or zoom item if needed. If one or both of those is
// created, we don't need to create a separate nsDisplaySubDocument.
uint32_t flags = nsDisplayOwnLayer::GENERATE_SUBDOC_INVALIDATIONS;
// If ignoreViewportScrolling is true then the top most layer we create here
// is going to become the scrollable layer for the root scroll frame, so we
// want to add nsDisplayOwnLayer::GENERATE_SCROLLABLE_LAYER to whatever layer
// becomes the topmost. We do this below.
if (constructZoomItem) {
uint32_t zoomFlags = flags;
if (ignoreViewportScrolling && !constructResolutionItem) {
zoomFlags |= nsDisplayOwnLayer::GENERATE_SCROLLABLE_LAYER;
}
nsDisplayZoom* zoomItem =
new (aBuilder) nsDisplayZoom(aBuilder, subdocRootFrame, &childItems,
subdocAPD, parentAPD, zoomFlags);
childItems.AppendToTop(zoomItem);
needsOwnLayer = false;
}
// Wrap the zoom item in the resolution item if we have both because we want the
// resolution scale applied on top of the app units per dev pixel conversion.
if (ignoreViewportScrolling) {
flags |= nsDisplayOwnLayer::GENERATE_SCROLLABLE_LAYER;
}
if (constructResolutionItem) {
nsDisplayResolution* resolutionItem =
new (aBuilder) nsDisplayResolution(aBuilder, subdocRootFrame, &childItems,
flags);
childItems.AppendToTop(resolutionItem);
needsOwnLayer = false;
}
if (needsOwnLayer) {
// We always want top level content documents to be in their own layer.
nsDisplaySubDocument* layerItem = new (aBuilder) nsDisplaySubDocument(
aBuilder, subdocRootFrame ? subdocRootFrame : this,
&childItems, flags);
childItems.AppendToTop(layerItem);
}
if (aBuilder->IsForFrameVisibility()) {
// We don't add the childItems to the return list as we're dealing with them here.
presShell->RebuildApproximateFrameVisibilityDisplayList(childItems);
childItems.DeleteAll();
} else {
aLists.Content()->AppendToTop(&childItems);
}
}
void
nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return;
// If mozpasspointerevents is set, then we should allow subdocument content
// to handle events even if we're pointer-events:none.
if (aBuilder->IsForEventDelivery() && !PassPointerEventsToChildren())
return;
DisplayBorderBackgroundOutline(aBuilder, aLists);
if (!mInnerView)
return;
nsFrameLoader* frameLoader = FrameLoader();
if (frameLoader) {
RenderFrameParent* rfp = frameLoader->GetCurrentRemoteFrame();
if (rfp) {
rfp->BuildDisplayList(aBuilder, this, aDirtyRect, aLists);
return;
}
}
nsView* subdocView = mInnerView->GetFirstChild();
if (!subdocView)
return;
nsCOMPtr<nsIPresShell> presShell = nullptr;
nsIFrame* subdocRootFrame = subdocView->GetFrame();
if (subdocRootFrame) {
presShell = subdocRootFrame->PresContext()->PresShell();
}
// If painting is suppressed in the presshell, we try to look for a better
// presshell to use.
if (!presShell || (presShell->IsPaintingSuppressed() &&
!aBuilder->IsIgnoringPaintSuppression())) {
// During page transition mInnerView will sometimes have two children, the
// first being the new page that may not have any frame, and the second
// being the old page that will probably have a frame.
nsView* nextView = subdocView->GetNextSibling();
nsIFrame* frame = nullptr;
if (nextView) {
frame = nextView->GetFrame();
}
if (frame) {
nsIPresShell* ps = frame->PresContext()->PresShell();
if (!presShell || (ps && !ps->IsPaintingSuppressed())) {
subdocView = nextView;
subdocRootFrame = frame;
presShell = ps;
}
}
if (!presShell) {
// If we don't have a frame we use this roundabout way to get the pres shell.
if (!mFrameLoader)
return;
nsCOMPtr<nsIDocShell> docShell;
mFrameLoader->GetDocShell(getter_AddRefs(docShell));
if (!docShell)
return;
presShell = docShell->GetPresShell();
if (!presShell)
return;
}
}
nsPresContext* presContext = presShell->GetPresContext();
int32_t parentAPD = PresContext()->AppUnitsPerDevPixel();
int32_t subdocAPD = presContext->AppUnitsPerDevPixel();
nsRect dirty;
if (subdocRootFrame) {
nsIDocument* doc = subdocRootFrame->PresContext()->Document();
nsIContent* root = doc ? doc->GetRootElement() : nullptr;
nsRect displayPort;
if (root && nsLayoutUtils::GetDisplayPort(root, &displayPort)) {
dirty = displayPort;
} else {
// get the dirty rect relative to the root frame of the subdoc
dirty = aDirtyRect + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
}
aBuilder->EnterPresShell(subdocRootFrame, dirty);
}
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
if (ShouldClipSubdocument()) {
clipState.ClipContainingBlockDescendantsToContentBox(aBuilder, this);
}
nsIScrollableFrame *sf = presShell->GetRootScrollFrameAsScrollable();
bool constructZoomItem = subdocRootFrame && parentAPD != subdocAPD;
bool needsOwnLayer = constructZoomItem ||
presContext->IsRootContentDocument() || (sf && sf->IsScrollingActive());
nsDisplayList childItems;
{
DisplayListClipState::AutoSaveRestore nestedClipState(aBuilder);
if (needsOwnLayer) {
// Clear current clip. There's no point in propagating it down, since
// the layer we will construct will be clipped by the current clip.
// In fact for nsDisplayZoom propagating it down would be incorrect since
// nsDisplayZoom changes the meaning of appunits.
nestedClipState.Clear();
}
if (subdocRootFrame) {
subdocRootFrame->
BuildDisplayListForStackingContext(aBuilder, dirty, &childItems);
}
if (!aBuilder->IsForEventDelivery()) {
// If we are going to use a displayzoom below then any items we put under
// it need to have underlying frames from the subdocument. So we need to
// calculate the bounds based on which frame will be the underlying frame
// for the canvas background color item.
nsRect bounds;
nsRect subdocBoundsInParentUnits = GetContentRectRelativeToSelf();
if (subdocRootFrame) {
bounds = subdocBoundsInParentUnits.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
} else {
bounds = subdocBoundsInParentUnits;
}
// If we are in print preview/page layout we want to paint the grey
// background behind the page, not the canvas color. The canvas color gets
// painted on the page itself.
if (nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
presShell->AddPrintPreviewBackgroundItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds);
} else {
// Add the canvas background color to the bottom of the list. This
// happens after we've built the list so that AddCanvasBackgroundColorItem
// can monkey with the contents if necessary.
uint32_t flags = nsIPresShell::FORCE_DRAW;
presShell->AddCanvasBackgroundColorItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds, NS_RGBA(0,0,0,0), flags);
}
}
}
if (constructZoomItem) {
nsDisplayZoom* zoomItem =
new (aBuilder) nsDisplayZoom(aBuilder, subdocRootFrame, &childItems,
subdocAPD, parentAPD,
nsDisplayOwnLayer::GENERATE_SUBDOC_INVALIDATIONS);
childItems.AppendToTop(zoomItem);
} else if (needsOwnLayer) {
// We always want top level content documents to be in their own layer.
nsDisplayOwnLayer* layerItem = new (aBuilder) nsDisplayOwnLayer(
aBuilder, subdocRootFrame ? subdocRootFrame : this,
&childItems, nsDisplayOwnLayer::GENERATE_SUBDOC_INVALIDATIONS);
childItems.AppendToTop(layerItem);
}
if (subdocRootFrame) {
aBuilder->LeavePresShell(subdocRootFrame, dirty);
}
if (aBuilder->IsForImageVisibility()) {
// We don't add the childItems to the return list as we're dealing with them here.
presShell->RebuildImageVisibility(childItems);
childItems.DeleteAll();
} else {
aLists.Content()->AppendToTop(&childItems);
}
}
NS_IMETHODIMP
nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return NS_OK;
if (aBuilder->IsForEventDelivery() &&
GetStyleVisibility()->mPointerEvents == NS_STYLE_POINTER_EVENTS_NONE)
return NS_OK;
nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
NS_ENSURE_SUCCESS(rv, rv);
if (!mInnerView)
return NS_OK;
nsFrameLoader* frameLoader = FrameLoader();
if (frameLoader) {
RenderFrameParent* rfp = frameLoader->GetCurrentRemoteFrame();
if (rfp) {
return rfp->BuildDisplayList(aBuilder, this, aDirtyRect, aLists);
}
}
nsIView* subdocView = mInnerView->GetFirstChild();
if (!subdocView)
return NS_OK;
nsCOMPtr<nsIPresShell> presShell = nsnull;
nsIFrame* subdocRootFrame =
static_cast<nsIFrame*>(subdocView->GetClientData());
if (subdocRootFrame) {
presShell = subdocRootFrame->PresContext()->PresShell();
}
// If painting is suppressed in the presshell, we try to look for a better
// presshell to use.
if (!presShell || (presShell->IsPaintingSuppressed() &&
!aBuilder->IsIgnoringPaintSuppression())) {
// During page transition mInnerView will sometimes have two children, the
// first being the new page that may not have any frame, and the second
// being the old page that will probably have a frame.
nsIView* nextView = subdocView->GetNextSibling();
nsIFrame* frame = nsnull;
if (nextView) {
frame = static_cast<nsIFrame*>(nextView->GetClientData());
}
if (frame) {
nsIPresShell* ps = frame->PresContext()->PresShell();
if (!presShell || (ps && !ps->IsPaintingSuppressed())) {
subdocView = nextView;
subdocRootFrame = frame;
presShell = ps;
}
}
if (!presShell) {
// If we don't have a frame we use this roundabout way to get the pres shell.
if (!mFrameLoader)
return NS_OK;
nsCOMPtr<nsIDocShell> docShell;
mFrameLoader->GetDocShell(getter_AddRefs(docShell));
if (!docShell)
return NS_OK;
docShell->GetPresShell(getter_AddRefs(presShell));
if (!presShell)
return NS_OK;
}
}
nsPresContext* presContext = presShell->GetPresContext();
nsDisplayList childItems;
PRInt32 parentAPD = PresContext()->AppUnitsPerDevPixel();
PRInt32 subdocAPD = presContext->AppUnitsPerDevPixel();
nsRect dirty;
if (subdocRootFrame) {
// get the dirty rect relative to the root frame of the subdoc
dirty = aDirtyRect + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
aBuilder->EnterPresShell(subdocRootFrame, dirty);
}
// The subdocView's bounds are in appunits of the subdocument, so adjust
// them.
nsRect subdocBoundsInParentUnits =
subdocView->GetBounds().ConvertAppUnitsRoundOut(subdocAPD, parentAPD);
// Get the bounds of subdocView relative to the reference frame.
subdocBoundsInParentUnits = subdocBoundsInParentUnits +
mInnerView->GetPosition() +
GetOffsetToCrossDoc(aBuilder->ReferenceFrame());
if (subdocRootFrame && NS_SUCCEEDED(rv)) {
rv = subdocRootFrame->
BuildDisplayListForStackingContext(aBuilder, dirty, &childItems);
}
if (!aBuilder->IsForEventDelivery()) {
// If we are going to use a displayzoom below then any items we put under
// it need to have underlying frames from the subdocument. So we need to
// calculate the bounds based on which frame will be the underlying frame
// for the canvas background color item.
nsRect bounds;
if (subdocRootFrame) {
nsPoint offset = mInnerView->GetPosition() +
GetOffsetToCrossDoc(aBuilder->ReferenceFrame());
offset = offset.ConvertAppUnits(parentAPD, subdocAPD);
bounds = subdocView->GetBounds() + offset;
} else {
bounds = subdocBoundsInParentUnits;
}
// If we are in print preview/page layout we want to paint the grey
// background behind the page, not the canvas color. The canvas color gets
// painted on the page itself.
if (nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
rv = presShell->AddPrintPreviewBackgroundItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds);
} else {
// Add the canvas background color to the bottom of the list. This
// happens after we've built the list so that AddCanvasBackgroundColorItem
// can monkey with the contents if necessary.
PRUint32 flags = nsIPresShell::FORCE_DRAW;
rv = presShell->AddCanvasBackgroundColorItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds, NS_RGBA(0,0,0,0), flags);
}
}
if (NS_SUCCEEDED(rv)) {
bool addedLayer = false;
if (subdocRootFrame && parentAPD != subdocAPD) {
NS_WARN_IF_FALSE(!addedLayer,
"Two container layers have been added. "
"Performance may suffer.");
addedLayer = true;
nsDisplayZoom* zoomItem =
new (aBuilder) nsDisplayZoom(aBuilder, subdocRootFrame, &childItems,
subdocAPD, parentAPD);
childItems.AppendToTop(zoomItem);
}
if (!addedLayer && presContext->IsRootContentDocument()) {
// We always want top level content documents to be in their own layer.
nsDisplayOwnLayer* layerItem = new (aBuilder) nsDisplayOwnLayer(
aBuilder, subdocRootFrame ? subdocRootFrame : this, &childItems);
childItems.AppendToTop(layerItem);
}
nsDisplayList list;
// Clip children to the child root frame's rectangle
rv = list.AppendNewToTop(
new (aBuilder) nsDisplayClip(aBuilder, this, &childItems,
subdocBoundsInParentUnits));
if (mIsInline) {
WrapReplacedContentForBorderRadius(aBuilder, &list, aLists);
} else {
aLists.Content()->AppendToTop(&list);
}
}
// delete childItems in case of OOM
childItems.DeleteAll();
if (subdocRootFrame) {
aBuilder->LeavePresShell(subdocRootFrame, dirty);
}
return rv;
}
NS_IMETHODIMP
nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return NS_OK;
if (aBuilder->IsForEventDelivery() &&
GetStyleVisibility()->mPointerEvents == NS_STYLE_POINTER_EVENTS_NONE)
return NS_OK;
nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
NS_ENSURE_SUCCESS(rv, rv);
if (!mInnerView)
return NS_OK;
#ifdef MOZ_IPC
nsFrameLoader* frameLoader = FrameLoader();
if (frameLoader) {
RenderFrameParent* rfp = frameLoader->GetCurrentRemoteFrame();
if (rfp) {
return rfp->BuildDisplayList(aBuilder, this, aDirtyRect, aLists);
}
}
#endif
nsIView* subdocView = mInnerView->GetFirstChild();
if (!subdocView)
return NS_OK;
nsCOMPtr<nsIPresShell> presShell = nsnull;
nsIFrame* subdocRootFrame =
static_cast<nsIFrame*>(subdocView->GetClientData());
if (subdocRootFrame) {
presShell = subdocRootFrame->PresContext()->PresShell();
}
// If painting is suppressed in the presshell, we try to look for a better
// presshell to use.
if (!presShell || (presShell->IsPaintingSuppressed() &&
!aBuilder->IsIgnoringPaintSuppression())) {
// During page transition mInnerView will sometimes have two children, the
// first being the new page that may not have any frame, and the second
// being the old page that will probably have a frame.
nsIView* nextView = subdocView->GetNextSibling();
nsIFrame* frame = nsnull;
if (nextView) {
frame = static_cast<nsIFrame*>(nextView->GetClientData());
}
if (frame) {
nsIPresShell* ps = frame->PresContext()->PresShell();
if (!presShell || (ps && !ps->IsPaintingSuppressed())) {
subdocView = nextView;
subdocRootFrame = frame;
presShell = ps;
}
}
if (!presShell) {
// If we don't have a frame we use this roundabout way to get the pres shell.
if (!mFrameLoader)
return NS_OK;
nsCOMPtr<nsIDocShell> docShell;
mFrameLoader->GetDocShell(getter_AddRefs(docShell));
if (!docShell)
return NS_OK;
docShell->GetPresShell(getter_AddRefs(presShell));
if (!presShell)
return NS_OK;
}
}
nsPresContext* presContext = presShell->GetPresContext();
nsDisplayList childItems;
PRInt32 parentAPD = PresContext()->AppUnitsPerDevPixel();
PRInt32 subdocAPD = presContext->AppUnitsPerDevPixel();
nsIFrame* subdocRootScrollFrame = presShell->GetRootScrollFrame();
nsRect dirty;
if (subdocRootFrame) {
if (presShell->UsingDisplayPort() && subdocRootScrollFrame) {
dirty = presShell->GetDisplayPort();
// The visual overflow rect of our viewport frame unfortunately may not
// intersect with the displayport of that frame. For example, the scroll
// offset of the frame may be (0, 0) so that the visual overflow rect
// is (0, 0, 800px, 500px) while the display port may have its top-left
// corner below y=500px.
//
// We have to force the frame to have a little faith and build a display
// list anyway. (see nsIFrame::BuildDisplayListForChild for the short-
// circuit code we are evading here).
//
subdocRootScrollFrame->AddStateBits(
NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO);
} else {
// get the dirty rect relative to the root frame of the subdoc
dirty = aDirtyRect + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ConvertAppUnitsRoundOut(parentAPD, subdocAPD);
}
aBuilder->EnterPresShell(subdocRootFrame, dirty);
}
// The subdocView's bounds are in appunits of the subdocument, so adjust
// them.
nsRect subdocBoundsInParentUnits =
subdocView->GetBounds().ConvertAppUnitsRoundOut(subdocAPD, parentAPD);
// Get the bounds of subdocView relative to the reference frame.
subdocBoundsInParentUnits = subdocBoundsInParentUnits +
mInnerView->GetPosition() +
GetOffsetToCrossDoc(aBuilder->ReferenceFrame());
if (subdocRootFrame && NS_SUCCEEDED(rv)) {
rv = subdocRootFrame->
BuildDisplayListForStackingContext(aBuilder, dirty, &childItems);
}
if (!aBuilder->IsForEventDelivery()) {
// If we are going to use a displayzoom below then any items we put under
// it need to have underlying frames from the subdocument. So we need to
// calculate the bounds based on which frame will be the underlying frame
// for the canvas background color item.
nsRect bounds;
if (subdocRootFrame) {
nsPoint offset = mInnerView->GetPosition() +
GetOffsetToCrossDoc(aBuilder->ReferenceFrame());
offset = offset.ConvertAppUnits(parentAPD, subdocAPD);
bounds = subdocView->GetBounds() + offset;
} else {
bounds = subdocBoundsInParentUnits;
}
// If we are in print preview/page layout we want to paint the grey
// background behind the page, not the canvas color. The canvas color gets
// painted on the page itself.
if (nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
rv = presShell->AddPrintPreviewBackgroundItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds);
} else {
// Add the canvas background color to the bottom of the list. This
// happens after we've built the list so that AddCanvasBackgroundColorItem
// can monkey with the contents if necessary.
PRUint32 flags = nsIPresShell_MOZILLA_2_0_BRANCH::FORCE_DRAW;
if (presContext->IsRootContentDocument()) {
flags |= nsIPresShell_MOZILLA_2_0_BRANCH::ROOT_CONTENT_DOC_BG;
}
rv = presShell->AddCanvasBackgroundColorItem(
*aBuilder, childItems, subdocRootFrame ? subdocRootFrame : this,
bounds, NS_RGBA(0,0,0,0), flags);
}
}
if (NS_SUCCEEDED(rv)) {
bool addedLayer = false;
#ifdef MOZ_IPC
// Make a scrollable layer in the child process so it can be manipulated
// with transforms in the parent process.
if (XRE_GetProcessType() == GeckoProcessType_Content) {
nsIScrollableFrame* scrollFrame = presShell->GetRootScrollFrameAsScrollable();
if (scrollFrame) {
NS_ASSERTION(subdocRootFrame, "Root scroll frame should be non-null");
nsRect scrollRange = scrollFrame->GetScrollRange();
// Since making new layers is expensive, only use nsDisplayScrollLayer
// if the area is scrollable.
if (scrollRange.width != 0 || scrollRange.height != 0) {
addedLayer = true;
nsDisplayScrollLayer* layerItem = new (aBuilder) nsDisplayScrollLayer(
aBuilder,
&childItems,
subdocRootScrollFrame,
subdocRootFrame
);
childItems.AppendToTop(layerItem);
}
}
}
#endif
if (subdocRootFrame && parentAPD != subdocAPD) {
NS_WARN_IF_FALSE(!addedLayer,
"Two container layers have been added. "
"Performance may suffer.");
addedLayer = true;
nsDisplayZoom* zoomItem =
new (aBuilder) nsDisplayZoom(aBuilder, subdocRootFrame, &childItems,
subdocAPD, parentAPD);
childItems.AppendToTop(zoomItem);
}
if (!addedLayer && presContext->IsRootContentDocument()) {
// We always want top level content documents to be in their own layer.
nsDisplayOwnLayer* layerItem = new (aBuilder) nsDisplayOwnLayer(
aBuilder, subdocRootFrame ? subdocRootFrame : this, &childItems);
childItems.AppendToTop(layerItem);
}
// Clip children to the child root frame's rectangle
rv = aLists.Content()->AppendNewToTop(
new (aBuilder) nsDisplayClip(aBuilder, this, &childItems,
subdocBoundsInParentUnits));
}
// delete childItems in case of OOM
childItems.DeleteAll();
if (subdocRootFrame) {
aBuilder->LeavePresShell(subdocRootFrame, dirty);
}
return rv;
}