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gecko-dev/layout/generic/nsSubDocumentFrame.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
/*
* rendering object for replaced elements that contain a document, such
* as <frame>, <iframe>, and some <object>s
*/
#include "nsSubDocumentFrame.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/StaticPrefs_layout.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/HTMLFrameElement.h"
#include "mozilla/dom/BrowserParent.h"
#include "nsCOMPtr.h"
#include "nsGenericHTMLElement.h"
#include "nsGenericHTMLFrameElement.h"
#include "nsAttrValueInlines.h"
#include "nsIDocShell.h"
#include "nsIContentViewer.h"
#include "nsIContentInlines.h"
#include "nsPresContext.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsGkAtoms.h"
#include "nsStyleConsts.h"
#include "nsStyleStruct.h"
#include "nsStyleStructInlines.h"
#include "nsFrameSetFrame.h"
#include "nsNameSpaceManager.h"
#include "nsDisplayList.h"
#include "nsIScrollableFrame.h"
#include "nsIObjectLoadingContent.h"
#include "nsLayoutUtils.h"
#include "FrameLayerBuilder.h"
#include "nsContentUtils.h"
#include "nsServiceManagerUtils.h"
#include "nsQueryObject.h"
#include "RetainedDisplayListBuilder.h"
#include "nsObjectLoadingContent.h"
#include "Layers.h"
#include "BasicLayers.h"
#include "mozilla/layers/WebRenderUserData.h"
#include "mozilla/layers/WebRenderScrollData.h"
#include "mozilla/layers/RenderRootStateManager.h"
#include "mozilla/ProfilerLabels.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::layers;
static Document* GetDocumentFromView(nsView* aView) {
MOZ_ASSERT(aView, "null view");
nsViewManager* vm = aView->GetViewManager();
PresShell* presShell = vm ? vm->GetPresShell() : nullptr;
return presShell ? presShell->GetDocument() : nullptr;
}
nsSubDocumentFrame::nsSubDocumentFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: nsAtomicContainerFrame(aStyle, aPresContext, kClassID),
mOuterView(nullptr),
mInnerView(nullptr),
mIsInline(false),
mPostedReflowCallback(false),
mDidCreateDoc(false),
mCallingShow(false) {}
#ifdef ACCESSIBILITY
a11y::AccType nsSubDocumentFrame::AccessibleType() {
return a11y::eOuterDocType;
}
#endif
NS_QUERYFRAME_HEAD(nsSubDocumentFrame)
NS_QUERYFRAME_ENTRY(nsSubDocumentFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsAtomicContainerFrame)
class AsyncFrameInit : public Runnable {
public:
explicit AsyncFrameInit(nsIFrame* aFrame)
: mozilla::Runnable("AsyncFrameInit"), mFrame(aFrame) {}
NS_IMETHOD Run() override {
AUTO_PROFILER_LABEL("AsyncFrameInit::Run", OTHER);
if (mFrame.IsAlive()) {
static_cast<nsSubDocumentFrame*>(mFrame.GetFrame())->ShowViewer();
}
return NS_OK;
}
private:
WeakFrame mFrame;
};
static void InsertViewsInReverseOrder(nsView* aSibling, nsView* aParent);
static void EndSwapDocShellsForViews(nsView* aView);
void nsSubDocumentFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
MOZ_ASSERT(aContent);
// determine if we are a <frame> or <iframe>
mIsInline = !aContent->IsHTMLElement(nsGkAtoms::frame);
nsAtomicContainerFrame::Init(aContent, aParent, aPrevInFlow);
// CreateView() creates this frame's view, stored in mOuterView. It needs to
// be created first since it's the parent of the inner view, stored in
// mInnerView.
CreateView();
EnsureInnerView();
// Set the primary frame now so that nsDocumentViewer::FindContainerView
// called from within EndSwapDocShellsForViews below can find it if needed.
aContent->SetPrimaryFrame(this);
// If we have a detached subdoc's root view on our frame loader, re-insert
// it into the view tree. This happens when we've been reframed, and
// ensures the presentation persists across reframes. If the frame element
// has changed documents however, we blow away the presentation.
RefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader) {
nsCOMPtr<Document> oldContainerDoc;
nsIFrame* detachedFrame =
frameloader->GetDetachedSubdocFrame(getter_AddRefs(oldContainerDoc));
frameloader->SetDetachedSubdocFrame(nullptr, nullptr);
MOZ_ASSERT(oldContainerDoc || !detachedFrame);
if (oldContainerDoc) {
nsView* detachedView = detachedFrame ? detachedFrame->GetView() : nullptr;
if (detachedView && oldContainerDoc == aContent->OwnerDoc()) {
// Restore stashed presentation.
::InsertViewsInReverseOrder(detachedView, mInnerView);
::EndSwapDocShellsForViews(mInnerView->GetFirstChild());
} else {
// Presentation is for a different document, don't restore it.
frameloader->Hide();
}
}
}
PropagateIsUnderHiddenEmbedderElementToSubView(
PresShell()->IsUnderHiddenEmbedderElement() ||
!StyleVisibility()->IsVisible());
nsContentUtils::AddScriptRunner(new AsyncFrameInit(this));
}
void nsSubDocumentFrame::PropagateIsUnderHiddenEmbedderElementToSubView(
bool aIsUnderHiddenEmbedderElement) {
if (mFrameLoader && mFrameLoader->IsRemoteFrame()) {
mFrameLoader->SendIsUnderHiddenEmbedderElement(
aIsUnderHiddenEmbedderElement);
return;
}
if (!mInnerView) {
return;
}
nsView* subdocView = mInnerView->GetFirstChild();
while (subdocView) {
if (mozilla::PresShell* presShell = subdocView->GetPresShell()) {
presShell->SetIsUnderHiddenEmbedderElement(aIsUnderHiddenEmbedderElement);
}
subdocView = subdocView->GetNextSibling();
}
}
void nsSubDocumentFrame::ShowViewer() {
if (mCallingShow) {
return;
}
RefPtr<nsFrameLoader> frameloader = FrameLoader();
if (!frameloader) {
return;
}
if (!frameloader->IsRemoteFrame() && !PresContext()->IsDynamic()) {
// We let the printing code take care of loading the document and
// initializing the shell; just create the inner view for it to use.
(void)EnsureInnerView();
} else {
AutoWeakFrame weakThis(this);
mCallingShow = true;
bool didCreateDoc = frameloader->Show(this);
if (!weakThis.IsAlive()) {
return;
}
mCallingShow = false;
mDidCreateDoc = didCreateDoc;
if (!HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) {
frameloader->UpdatePositionAndSize(this);
}
if (!weakThis.IsAlive()) {
return;
}
InvalidateFrame();
}
}
nsIFrame* nsSubDocumentFrame::GetSubdocumentRootFrame() {
if (!mInnerView) return nullptr;
nsView* subdocView = mInnerView->GetFirstChild();
return subdocView ? subdocView->GetFrame() : nullptr;
}
mozilla::PresShell* nsSubDocumentFrame::GetSubdocumentPresShellForPainting(
uint32_t aFlags) {
if (!mInnerView) return nullptr;
nsView* subdocView = mInnerView->GetFirstChild();
if (!subdocView) return nullptr;
mozilla::PresShell* presShell = nullptr;
nsIFrame* subdocRootFrame = subdocView->GetFrame();
if (subdocRootFrame) {
presShell = subdocRootFrame->PresShell();
}
// If painting is suppressed in the presshell, we try to look for a better
// presshell to use.
if (!presShell || (presShell->IsPaintingSuppressed() &&
!(aFlags & IGNORE_PAINT_SUPPRESSION))) {
// 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) {
mozilla::PresShell* presShellForNextView = frame->PresShell();
if (!presShell || (presShellForNextView &&
!presShellForNextView->IsPaintingSuppressed() &&
StaticPrefs::layout_show_previous_page())) {
subdocView = nextView;
subdocRootFrame = frame;
presShell = presShellForNextView;
}
}
if (!presShell) {
// If we don't have a frame we use this roundabout way to get the pres
// shell.
if (!mFrameLoader) return nullptr;
nsIDocShell* docShell = mFrameLoader->GetDocShell(IgnoreErrors());
if (!docShell) return nullptr;
presShell = docShell->GetPresShell();
}
}
return presShell;
}
ScreenIntSize nsSubDocumentFrame::GetSubdocumentSize() {
if (HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) {
if (RefPtr<nsFrameLoader> frameloader = FrameLoader()) {
nsCOMPtr<Document> oldContainerDoc;
nsIFrame* detachedFrame =
frameloader->GetDetachedSubdocFrame(getter_AddRefs(oldContainerDoc));
if (nsView* view = detachedFrame ? detachedFrame->GetView() : nullptr) {
nsSize size = view->GetBounds().Size();
nsPresContext* presContext = detachedFrame->PresContext();
return ScreenIntSize(presContext->AppUnitsToDevPixels(size.width),
presContext->AppUnitsToDevPixels(size.height));
}
}
// Pick some default size for now. Using 10x10 because that's what the
// code used to do.
return ScreenIntSize(10, 10);
}
nsSize docSizeAppUnits;
nsPresContext* presContext = PresContext();
if (GetContent()->IsHTMLElement(nsGkAtoms::frame)) {
docSizeAppUnits = GetSize();
} else {
docSizeAppUnits = GetContentRect().Size();
}
// Adjust subdocument size, according to 'object-fit' and the subdocument's
// intrinsic size and ratio.
docSizeAppUnits = nsLayoutUtils::ComputeObjectDestRect(
nsRect(nsPoint(), docSizeAppUnits), GetIntrinsicSize(),
GetIntrinsicRatio(), StylePosition())
.Size();
return ScreenIntSize(
presContext->AppUnitsToDevPixels(docSizeAppUnits.width),
presContext->AppUnitsToDevPixels(docSizeAppUnits.height));
}
static void WrapBackgroundColorInOwnLayer(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame,
nsDisplayList* aList) {
nsDisplayList tempItems;
nsDisplayItem* item;
while ((item = aList->RemoveBottom()) != nullptr) {
if (item->GetType() == DisplayItemType::TYPE_BACKGROUND_COLOR) {
nsDisplayList tmpList;
tmpList.AppendToTop(item);
item = MakeDisplayItemWithIndex<nsDisplayOwnLayer>(
aBuilder, aFrame, /* aIndex = */ nsDisplayOwnLayer::OwnLayerForSubdoc,
&tmpList, aBuilder->CurrentActiveScrolledRoot(),
nsDisplayOwnLayerFlags::None, ScrollbarData{}, true, false);
}
if (item) {
tempItems.AppendToTop(item);
}
}
aList->AppendToTop(&tempItems);
}
void nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
if (!IsVisibleForPainting()) {
return;
}
nsFrameLoader* frameLoader = FrameLoader();
bool isRemoteFrame = frameLoader && frameLoader->IsRemoteFrame();
// If we are pointer-events:none then we don't need to HitTest background
bool pointerEventsNone =
StyleUI()->mPointerEvents == StylePointerEvents::None;
if (!aBuilder->IsForEventDelivery() || !pointerEventsNone) {
nsDisplayListCollection decorations(aBuilder);
DisplayBorderBackgroundOutline(aBuilder, decorations);
if (isRemoteFrame) {
// 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 (isRemoteFrame) {
// We're the subdoc for <browser remote="true"> and it has
// painted content. Display its shadow layer tree.
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
clipState.ClipContainingBlockDescendantsToContentBox(aBuilder, this);
aLists.Content()->AppendNewToTop<nsDisplayRemote>(aBuilder, this);
return;
}
RefPtr<mozilla::PresShell> presShell = GetSubdocumentPresShellForPainting(
aBuilder->IsIgnoringPaintSuppression() ? IGNORE_PAINT_SUPPRESSION : 0);
if (!presShell) {
return;
}
if (aBuilder->IsInFilter()) {
Document* outerDoc = PresShell()->GetDocument();
Document* innerDoc = presShell->GetDocument();
if (outerDoc && innerDoc) {
if (!outerDoc->NodePrincipal()->Equals(innerDoc->NodePrincipal())) {
outerDoc->SetUseCounter(eUseCounter_custom_FilteredCrossOriginIFrame);
}
}
}
nsIFrame* subdocRootFrame = presShell->GetRootFrame();
nsPresContext* presContext = presShell->GetPresContext();
int32_t parentAPD = PresContext()->AppUnitsPerDevPixel();
int32_t subdocAPD = presContext->AppUnitsPerDevPixel();
nsRect visible;
nsRect dirty;
bool ignoreViewportScrolling = false;
if (subdocRootFrame) {
// get the dirty rect relative to the root frame of the subdoc
visible = aBuilder->GetVisibleRect() + GetOffsetToCrossDoc(subdocRootFrame);
dirty = aBuilder->GetDirtyRect() + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
visible = visible.ScaleToOtherAppUnitsRoundOut(parentAPD, subdocAPD);
dirty = dirty.ScaleToOtherAppUnitsRoundOut(parentAPD, subdocAPD);
if (nsIScrollableFrame* rootScrollableFrame =
presShell->GetRootScrollFrameAsScrollable()) {
// Use a copy, so the rects don't get modified.
nsRect copyOfDirty = dirty;
nsRect copyOfVisible = visible;
// TODO(botond): Can we just axe this DecideScrollableLayer call?
rootScrollableFrame->DecideScrollableLayer(aBuilder, &copyOfVisible,
&copyOfDirty,
/* aSetBase = */ true);
ignoreViewportScrolling = presShell->IgnoringViewportScrolling();
}
aBuilder->EnterPresShell(subdocRootFrame, pointerEventsNone);
aBuilder->IncrementPresShellPaintCount(presShell);
} else {
visible = aBuilder->GetVisibleRect();
dirty = aBuilder->GetDirtyRect();
}
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
clipState.ClipContainingBlockDescendantsToContentBox(aBuilder, this);
nsIScrollableFrame* sf = presShell->GetRootScrollFrameAsScrollable();
bool constructZoomItem = subdocRootFrame && parentAPD != subdocAPD;
bool needsOwnLayer = false;
if (constructZoomItem || presContext->IsRootContentDocument() ||
(sf && sf->IsScrollingActive())) {
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.Clear();
}
// 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,
visible, dirty);
if (subdocRootFrame) {
nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
nsDisplayListBuilder::AutoCurrentScrollParentIdSetter idSetter(
aBuilder,
ignoreViewportScrolling && rootScrollFrame &&
rootScrollFrame->GetContent()
? nsLayoutUtils::FindOrCreateIDFor(rootScrollFrame->GetContent())
: aBuilder->GetCurrentScrollParentId());
bool hasDocumentLevelListenersForApzAwareEvents =
gfxPlatform::AsyncPanZoomEnabled() &&
nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(presShell);
aBuilder->SetAncestorHasApzAwareEventHandler(
hasDocumentLevelListenersForApzAwareEvents);
subdocRootFrame->BuildDisplayListForStackingContext(aBuilder,
&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, frame,
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.
AddCanvasBackgroundColorFlags flags =
AddCanvasBackgroundColorFlags::ForceDraw |
AddCanvasBackgroundColorFlags::AddForSubDocument;
presShell->AddCanvasBackgroundColorItem(
aBuilder, &childItems, frame, bounds, NS_RGBA(0, 0, 0, 0), flags);
}
}
}
if (subdocRootFrame) {
aBuilder->LeavePresShell(subdocRootFrame, &childItems);
}
// 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.
nsDisplayOwnLayerFlags flags =
nsDisplayOwnLayerFlags::GenerateSubdocInvalidations;
// 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) {
nsDisplayOwnLayerFlags zoomFlags = flags;
if (ignoreViewportScrolling) {
zoomFlags |= nsDisplayOwnLayerFlags::GenerateScrollableLayer;
}
childItems.AppendNewToTop<nsDisplayZoom>(aBuilder, subdocRootFrame, this,
&childItems, subdocAPD, parentAPD,
zoomFlags);
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 |= nsDisplayOwnLayerFlags::GenerateScrollableLayer;
}
// We always want top level content documents to be in their own layer.
nsDisplaySubDocument* layerItem = MakeDisplayItem<nsDisplaySubDocument>(
aBuilder, subdocRootFrame ? subdocRootFrame : this, this, &childItems,
flags);
if (layerItem) {
childItems.AppendToTop(layerItem);
layerItem->SetShouldFlattenAway(!needsOwnLayer);
}
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(aBuilder);
} else {
aLists.Content()->AppendToTop(&childItems);
}
}
#ifdef DEBUG_FRAME_DUMP
void nsSubDocumentFrame::List(FILE* out, const char* aPrefix,
ListFlags aFlags) const {
nsCString str;
ListGeneric(str, aPrefix, aFlags);
fprintf_stderr(out, "%s\n", str.get());
if (aFlags.contains(ListFlag::TraverseSubdocumentFrames)) {
nsSubDocumentFrame* f = const_cast<nsSubDocumentFrame*>(this);
nsIFrame* subdocRootFrame = f->GetSubdocumentRootFrame();
if (subdocRootFrame) {
nsCString pfx(aPrefix);
pfx += " ";
subdocRootFrame->List(out, pfx.get(), aFlags);
}
}
}
nsresult nsSubDocumentFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(u"FrameOuter"_ns, aResult);
}
#endif
/* virtual */
nscoord nsSubDocumentFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord result;
DISPLAY_MIN_INLINE_SIZE(this, result);
nsCOMPtr<nsIObjectLoadingContent> iolc = do_QueryInterface(mContent);
auto olc = static_cast<nsObjectLoadingContent*>(iolc.get());
if (olc && olc->GetSubdocumentIntrinsicSize()) {
// The subdocument is an SVG document, so technically we should call
// SVGOuterSVGFrame::GetMinISize() on its root frame. That method always
// returns 0, though, so we can just do that & don't need to bother with
// the cross-doc communication.
result = 0;
} else {
result = GetIntrinsicISize();
}
return result;
}
/* virtual */
nscoord nsSubDocumentFrame::GetPrefISize(gfxContext* aRenderingContext) {
nscoord result;
DISPLAY_PREF_INLINE_SIZE(this, result);
// If the subdocument is an SVG document, then in theory we want to return
// the same thing that SVGOuterSVGFrame::GetPrefISize does. That method
// has some special handling of percentage values to avoid unhelpful zero
// sizing in the presence of orthogonal writing modes. We don't bother
// with that for SVG documents in <embed> and <object>, since that special
// handling doesn't look up across document boundaries anyway.
result = GetIntrinsicISize();
return result;
}
/* virtual */
IntrinsicSize nsSubDocumentFrame::GetIntrinsicSize() {
if (StyleDisplay()->IsContainSize()) {
// Intrinsic size of 'contain:size' replaced elements is 0,0.
return IntrinsicSize(0, 0);
}
if (nsCOMPtr<nsIObjectLoadingContent> iolc = do_QueryInterface(mContent)) {
auto olc = static_cast<nsObjectLoadingContent*>(iolc.get());
if (auto size = olc->GetSubdocumentIntrinsicSize()) {
// Use the intrinsic size from the child SVG document, if available.
return *size;
}
}
if (!IsInline()) {
return {}; // <frame> elements have no useful intrinsic size.
}
if (mContent->IsXULElement()) {
return {}; // XUL <iframe> and <browser> have no useful intrinsic size
}
// We must be an HTML <iframe>. Return fallback size.
return IntrinsicSize(kFallbackIntrinsicSize);
}
/* virtual */
AspectRatio nsSubDocumentFrame::GetIntrinsicRatio() const {
// FIXME(emilio): This should probably respect contain: size and return no
// ratio in the case subDocRoot is non-null. Otherwise we do it by virtue of
// using a zero-size below and reusing GetIntrinsicSize().
if (nsCOMPtr<nsIObjectLoadingContent> iolc = do_QueryInterface(mContent)) {
auto olc = static_cast<nsObjectLoadingContent*>(iolc.get());
auto ratio = olc->GetSubdocumentIntrinsicRatio();
if (ratio && *ratio) {
// Use the intrinsic aspect ratio from the child SVG document, if
// available.
return *ratio;
}
}
// NOTE(emilio): Even though we have an intrinsic size, we may not have an
// intrinsic ratio. For example `<iframe style="width: 100px">` should not
// shrink in the vertical axis to preserve the 300x150 ratio.
return nsAtomicContainerFrame::GetIntrinsicRatio();
}
/* virtual */
LogicalSize nsSubDocumentFrame::ComputeAutoSize(
gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
nscoord aAvailableISize, const LogicalSize& aMargin,
const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
ComputeSizeFlags aFlags) {
if (!IsInline()) {
return nsIFrame::ComputeAutoSize(aRenderingContext, aWM, aCBSize,
aAvailableISize, aMargin, aBorderPadding,
aSizeOverrides, aFlags);
}
const WritingMode wm = GetWritingMode();
LogicalSize result(wm, GetIntrinsicISize(), GetIntrinsicBSize());
return result.ConvertTo(aWM, wm);
}
/* virtual */
nsIFrame::SizeComputationResult nsSubDocumentFrame::ComputeSize(
gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
nscoord aAvailableISize, const LogicalSize& aMargin,
const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
ComputeSizeFlags aFlags) {
return {ComputeSizeWithIntrinsicDimensions(
aRenderingContext, aWM, GetIntrinsicSize(), GetAspectRatio(),
aCBSize, aMargin, aBorderPadding, aSizeOverrides, aFlags),
AspectRatioUsage::None};
}
void nsSubDocumentFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsSubDocumentFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
NS_FRAME_TRACE(
NS_FRAME_TRACE_CALLS,
("enter nsSubDocumentFrame::Reflow: maxSize=%d,%d",
aReflowInput.AvailableWidth(), aReflowInput.AvailableHeight()));
NS_ASSERTION(aReflowInput.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
"Shouldn't have unconstrained stuff here "
"thanks to the rules of reflow");
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aReflowInput.ComputedHeight(),
"Shouldn't have unconstrained stuff here "
"thanks to ComputeAutoSize");
NS_ASSERTION(mContent->GetPrimaryFrame() == this, "Shouldn't happen");
// XUL <iframe> or <browser>, or HTML <iframe>, <object> or <embed>
const auto wm = aReflowInput.GetWritingMode();
aDesiredSize.SetSize(wm, aReflowInput.ComputedSizeWithBorderPadding(wm));
// "offset" is the offset of our content area from our frame's
// top-left corner.
nsPoint offset = nsPoint(aReflowInput.ComputedPhysicalBorderPadding().left,
aReflowInput.ComputedPhysicalBorderPadding().top);
if (mInnerView) {
const nsMargin& bp = aReflowInput.ComputedPhysicalBorderPadding();
nsSize innerSize(aDesiredSize.Width() - bp.LeftRight(),
aDesiredSize.Height() - bp.TopBottom());
// Size & position the view according to 'object-fit' & 'object-position'.
nsRect destRect = nsLayoutUtils::ComputeObjectDestRect(
nsRect(offset, innerSize), GetIntrinsicSize(), GetIntrinsicRatio(),
StylePosition());
nsViewManager* vm = mInnerView->GetViewManager();
vm->MoveViewTo(mInnerView, destRect.x, destRect.y);
vm->ResizeView(mInnerView, nsRect(nsPoint(0, 0), destRect.Size()), true);
}
aDesiredSize.SetOverflowAreasToDesiredBounds();
FinishAndStoreOverflow(&aDesiredSize);
if (!aPresContext->IsPaginated() && !mPostedReflowCallback) {
PresShell()->PostReflowCallback(this);
mPostedReflowCallback = true;
}
NS_FRAME_TRACE(
NS_FRAME_TRACE_CALLS,
("exit nsSubDocumentFrame::Reflow: size=%d,%d status=%s",
aDesiredSize.Width(), aDesiredSize.Height(), ToString(aStatus).c_str()));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
bool nsSubDocumentFrame::ReflowFinished() {
RefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader) {
AutoWeakFrame weakFrame(this);
frameloader->UpdatePositionAndSize(this);
if (weakFrame.IsAlive()) {
// Make sure that we can post a reflow callback in the future.
mPostedReflowCallback = false;
}
} else {
mPostedReflowCallback = false;
}
return false;
}
void nsSubDocumentFrame::ReflowCallbackCanceled() {
mPostedReflowCallback = false;
}
nsresult nsSubDocumentFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
if (aNameSpaceID != kNameSpaceID_None) {
return NS_OK;
}
// If the noResize attribute changes, dis/allow frame to be resized
if (aAttribute == nsGkAtoms::noresize) {
// Note that we're not doing content type checks, but that's ok -- if
// they'd fail we will just end up with a null framesetFrame.
if (mContent->GetParent()->IsHTMLElement(nsGkAtoms::frameset)) {
nsIFrame* parentFrame = GetParent();
if (parentFrame) {
// There is no interface for nsHTMLFramesetFrame so QI'ing to
// concrete class, yay!
nsHTMLFramesetFrame* framesetFrame = do_QueryFrame(parentFrame);
if (framesetFrame) {
framesetFrame->RecalculateBorderResize();
}
}
}
} else if (aAttribute == nsGkAtoms::marginwidth ||
aAttribute == nsGkAtoms::marginheight) {
// Notify the frameloader
if (RefPtr<nsFrameLoader> frameloader = FrameLoader()) {
frameloader->MarginsChanged();
}
}
return NS_OK;
}
void nsSubDocumentFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) {
nsAtomicContainerFrame::DidSetComputedStyle(aOldComputedStyle);
// If this presshell has invisible ancestors, we don't need to propagate the
// visibility style change to the subdocument since the subdocument should
// have already set the IsUnderHiddenEmbedderElement flag in
// nsSubDocumentFrame::Init.
if (PresShell()->IsUnderHiddenEmbedderElement()) {
return;
}
const bool isVisible = StyleVisibility()->IsVisible();
if (!aOldComputedStyle ||
isVisible != aOldComputedStyle->StyleVisibility()->IsVisible()) {
PropagateIsUnderHiddenEmbedderElementToSubView(!isVisible);
}
}
nsIFrame* NS_NewSubDocumentFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
return new (aPresShell)
nsSubDocumentFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsSubDocumentFrame)
class nsHideViewer : public Runnable {
public:
nsHideViewer(nsIContent* aFrameElement, nsFrameLoader* aFrameLoader,
PresShell* aPresShell, bool aHideViewerIfFrameless)
: mozilla::Runnable("nsHideViewer"),
mFrameElement(aFrameElement),
mFrameLoader(aFrameLoader),
mPresShell(aPresShell),
mHideViewerIfFrameless(aHideViewerIfFrameless) {
NS_ASSERTION(mFrameElement, "Must have a frame element");
NS_ASSERTION(mFrameLoader, "Must have a frame loader");
NS_ASSERTION(mPresShell, "Must have a presshell");
}
MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD Run() override {
// Flush frames, to ensure any pending display:none changes are made.
// Note it can be unsafe to flush if we've destroyed the presentation
// for some other reason, like if we're shutting down.
//
// But avoid the flush if we know for sure we're away, like when we're out
// of the document already.
//
// FIXME(emilio): This could still be a perf footgun when removing lots of
// siblings where each of them cause the reframe of an ancestor which happen
// to contain a subdocument.
//
// We should find some way to avoid that!
if (!mPresShell->IsDestroying() && mFrameElement->IsInComposedDoc()) {
MOZ_KnownLive(mPresShell)->FlushPendingNotifications(FlushType::Frames);
}
// Either the frame has been constructed by now, or it never will be,
// either way we want to clear the stashed views.
mFrameLoader->SetDetachedSubdocFrame(nullptr, nullptr);
nsSubDocumentFrame* frame = do_QueryFrame(mFrameElement->GetPrimaryFrame());
if ((!frame && mHideViewerIfFrameless) || mPresShell->IsDestroying()) {
// Either the frame element has no nsIFrame or the presshell is being
// destroyed. Hide the nsFrameLoader, which destroys the presentation.
mFrameLoader->Hide();
}
return NS_OK;
}
private:
nsCOMPtr<nsIContent> mFrameElement;
RefPtr<nsFrameLoader> mFrameLoader;
RefPtr<PresShell> mPresShell;
bool mHideViewerIfFrameless;
};
static nsView* BeginSwapDocShellsForViews(nsView* aSibling);
void nsSubDocumentFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
if (mPostedReflowCallback) {
PresShell()->CancelReflowCallback(this);
mPostedReflowCallback = false;
}
// Detach the subdocument's views and stash them in the frame loader.
// We can then reattach them if we're being reframed (for example if
// the frame has been made position:fixed).
RefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader) {
nsView* detachedViews =
::BeginSwapDocShellsForViews(mInnerView->GetFirstChild());
if (detachedViews && detachedViews->GetFrame()) {
frameloader->SetDetachedSubdocFrame(detachedViews->GetFrame(),
mContent->OwnerDoc());
// We call nsFrameLoader::HideViewer() in a script runner so that we can
// safely determine whether the frame is being reframed or destroyed.
nsContentUtils::AddScriptRunner(new nsHideViewer(
mContent, frameloader, PresShell(), (mDidCreateDoc || mCallingShow)));
} else {
frameloader->SetDetachedSubdocFrame(nullptr, nullptr);
if (mDidCreateDoc || mCallingShow) {
frameloader->Hide();
}
}
}
nsAtomicContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
nsFrameLoader* nsSubDocumentFrame::FrameLoader() const {
if (mFrameLoader) {
return mFrameLoader;
}
if (RefPtr<nsFrameLoaderOwner> loaderOwner = do_QueryObject(GetContent())) {
mFrameLoader = loaderOwner->GetFrameLoader();
}
return mFrameLoader;
}
void nsSubDocumentFrame::ResetFrameLoader() {
mFrameLoader = nullptr;
ClearDisplayItems();
nsContentUtils::AddScriptRunner(new AsyncFrameInit(this));
}
// XXX this should be called ObtainDocShell or something like that,
// to indicate that it could have side effects
nsIDocShell* nsSubDocumentFrame::GetDocShell() const {
// How can FrameLoader() return null???
if (NS_WARN_IF(!FrameLoader())) {
return nullptr;
}
return mFrameLoader->GetDocShell(IgnoreErrors());
}
static void DestroyDisplayItemDataForFrames(nsIFrame* aFrame) {
FrameLayerBuilder::DestroyDisplayItemDataFor(aFrame);
for (const auto& childList : aFrame->ChildLists()) {
for (nsIFrame* child : childList.mList) {
DestroyDisplayItemDataForFrames(child);
}
}
}
static CallState BeginSwapDocShellsForDocument(Document& aDocument) {
if (PresShell* presShell = aDocument.GetPresShell()) {
// Disable painting while the views are detached, see bug 946929.
presShell->SetNeverPainting(true);
if (nsIFrame* rootFrame = presShell->GetRootFrame()) {
::DestroyDisplayItemDataForFrames(rootFrame);
}
}
aDocument.EnumerateSubDocuments(BeginSwapDocShellsForDocument);
return CallState::Continue;
}
static nsView* BeginSwapDocShellsForViews(nsView* aSibling) {
// Collect the removed sibling views in reverse order in 'removedViews'.
nsView* removedViews = nullptr;
while (aSibling) {
if (Document* doc = ::GetDocumentFromView(aSibling)) {
::BeginSwapDocShellsForDocument(*doc);
}
nsView* next = aSibling->GetNextSibling();
aSibling->GetViewManager()->RemoveChild(aSibling);
aSibling->SetNextSibling(removedViews);
removedViews = aSibling;
aSibling = next;
}
return removedViews;
}
static void InsertViewsInReverseOrder(nsView* aSibling, nsView* aParent) {
MOZ_ASSERT(aParent, "null view");
MOZ_ASSERT(!aParent->GetFirstChild(), "inserting into non-empty list");
nsViewManager* vm = aParent->GetViewManager();
while (aSibling) {
nsView* next = aSibling->GetNextSibling();
aSibling->SetNextSibling(nullptr);
// true means 'after' in document order which is 'before' in view order,
// so this call prepends the child, thus reversing the siblings as we go.
vm->InsertChild(aParent, aSibling, nullptr, true);
aSibling = next;
}
}
nsresult nsSubDocumentFrame::BeginSwapDocShells(nsIFrame* aOther) {
if (!aOther || !aOther->IsSubDocumentFrame()) {
return NS_ERROR_NOT_IMPLEMENTED;
}
nsSubDocumentFrame* other = static_cast<nsSubDocumentFrame*>(aOther);
if (!mFrameLoader || !mDidCreateDoc || mCallingShow || !other->mFrameLoader ||
!other->mDidCreateDoc) {
return NS_ERROR_NOT_IMPLEMENTED;
}
ClearDisplayItems();
other->ClearDisplayItems();
if (mInnerView && other->mInnerView) {
nsView* ourSubdocViews = mInnerView->GetFirstChild();
nsView* ourRemovedViews = ::BeginSwapDocShellsForViews(ourSubdocViews);
nsView* otherSubdocViews = other->mInnerView->GetFirstChild();
nsView* otherRemovedViews = ::BeginSwapDocShellsForViews(otherSubdocViews);
::InsertViewsInReverseOrder(ourRemovedViews, other->mInnerView);
::InsertViewsInReverseOrder(otherRemovedViews, mInnerView);
}
mFrameLoader.swap(other->mFrameLoader);
return NS_OK;
}
static CallState EndSwapDocShellsForDocument(Document& aDocument) {
// Our docshell and view trees have been updated for the new hierarchy.
// Now also update all nsDeviceContext::mWidget to that of the
// container view in the new hierarchy.
if (nsCOMPtr<nsIDocShell> ds = aDocument.GetDocShell()) {
nsCOMPtr<nsIContentViewer> cv;
ds->GetContentViewer(getter_AddRefs(cv));
while (cv) {
RefPtr<nsPresContext> pc = cv->GetPresContext();
if (pc && pc->GetPresShell()) {
pc->GetPresShell()->SetNeverPainting(ds->IsInvisible());
}
nsDeviceContext* dc = pc ? pc->DeviceContext() : nullptr;
if (dc) {
nsView* v = cv->FindContainerView();
dc->Init(v ? v->GetNearestWidget(nullptr) : nullptr);
}
cv = cv->GetPreviousViewer();
}
}
aDocument.EnumerateSubDocuments(EndSwapDocShellsForDocument);
return CallState::Continue;
}
static void EndSwapDocShellsForViews(nsView* aSibling) {
for (; aSibling; aSibling = aSibling->GetNextSibling()) {
if (Document* doc = ::GetDocumentFromView(aSibling)) {
::EndSwapDocShellsForDocument(*doc);
}
nsIFrame* frame = aSibling->GetFrame();
if (frame) {
nsIFrame* parent = nsLayoutUtils::GetCrossDocParentFrameInProcess(frame);
if (parent->HasAnyStateBits(NS_FRAME_IN_POPUP)) {
nsIFrame::AddInPopupStateBitToDescendants(frame);
} else {
nsIFrame::RemoveInPopupStateBitFromDescendants(frame);
}
if (frame->HasInvalidFrameInSubtree()) {
while (parent &&
!parent->HasAnyStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT |
NS_FRAME_IS_NONDISPLAY)) {
parent->AddStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT);
parent = nsLayoutUtils::GetCrossDocParentFrameInProcess(parent);
}
}
}
}
}
void nsSubDocumentFrame::EndSwapDocShells(nsIFrame* aOther) {
nsSubDocumentFrame* other = static_cast<nsSubDocumentFrame*>(aOther);
AutoWeakFrame weakThis(this);
AutoWeakFrame weakOther(aOther);
if (mInnerView) {
::EndSwapDocShellsForViews(mInnerView->GetFirstChild());
}
if (other->mInnerView) {
::EndSwapDocShellsForViews(other->mInnerView->GetFirstChild());
}
// Now make sure we reflow both frames, in case their contents
// determine their size.
// And repaint them, for good measure, in case there's nothing
// interesting that happens during reflow.
if (weakThis.IsAlive()) {
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::TreeChange,
NS_FRAME_IS_DIRTY);
InvalidateFrameSubtree();
PropagateIsUnderHiddenEmbedderElementToSubView(
PresShell()->IsUnderHiddenEmbedderElement() ||
!StyleVisibility()->IsVisible());
}
if (weakOther.IsAlive()) {
other->PresShell()->FrameNeedsReflow(other, IntrinsicDirty::TreeChange,
NS_FRAME_IS_DIRTY);
other->InvalidateFrameSubtree();
other->PropagateIsUnderHiddenEmbedderElementToSubView(
other->PresShell()->IsUnderHiddenEmbedderElement() ||
!other->StyleVisibility()->IsVisible());
}
}
void nsSubDocumentFrame::ClearDisplayItems() {
for (nsDisplayItemBase* i : DisplayItems()) {
if (i->GetType() == DisplayItemType::TYPE_SUBDOCUMENT) {
nsIFrame* displayRoot = nsLayoutUtils::GetDisplayRootFrame(this);
MOZ_ASSERT(displayRoot);
RetainedDisplayListBuilder* retainedBuilder =
displayRoot->GetProperty(RetainedDisplayListBuilder::Cached());
MOZ_ASSERT(retainedBuilder);
auto* item = static_cast<nsDisplaySubDocument*>(i);
item->GetChildren()->DeleteAll(retainedBuilder->Builder());
item->Disown();
break;
}
}
}
nsView* nsSubDocumentFrame::EnsureInnerView() {
if (mInnerView) {
return mInnerView;
}
// create, init, set the parent of the view
nsView* outerView = GetView();
NS_ASSERTION(outerView, "Must have an outer view already");
nsRect viewBounds(0, 0, 0, 0); // size will be fixed during reflow
nsViewManager* viewMan = outerView->GetViewManager();
nsView* innerView = viewMan->CreateView(viewBounds, outerView);
if (!innerView) {
NS_ERROR("Could not create inner view");
return nullptr;
}
mInnerView = innerView;
viewMan->InsertChild(outerView, innerView, nullptr, true);
return mInnerView;
}
nsPoint nsSubDocumentFrame::GetExtraOffset() const {
MOZ_ASSERT(mInnerView);
return mInnerView->GetPosition();
}
void nsSubDocumentFrame::SubdocumentIntrinsicSizeOrRatioChanged() {
if (MOZ_UNLIKELY(HasAllStateBits(NS_FRAME_IS_DIRTY))) {
// We will be reflowed soon anyway.
return;
}
const nsStylePosition* pos = StylePosition();
bool dependsOnIntrinsics =
!pos->mWidth.ConvertsToLength() || !pos->mHeight.ConvertsToLength();
if (dependsOnIntrinsics || pos->mObjectFit != StyleObjectFit::Fill) {
auto dirtyHint = dependsOnIntrinsics ? IntrinsicDirty::StyleChange
: IntrinsicDirty::Resize;
PresShell()->FrameNeedsReflow(this, dirtyHint, NS_FRAME_IS_DIRTY);
}
}
/**
* Gets the layer-pixel offset of aContainerFrame's content rect top-left
* from the nearest display item reference frame (which we assume will be
* inducing a ContainerLayer).
*/
static nsPoint GetContentRectLayerOffset(nsIFrame* aContainerFrame,
nsDisplayListBuilder* aBuilder) {
// Offset to the content rect in case we have borders or padding
// Note that aContainerFrame could be a reference frame itself, so
// we need to be careful here to ensure that we call ToReferenceFrame
// on aContainerFrame and not its parent.
nsPoint frameOffset =
aBuilder->ToReferenceFrame(aContainerFrame) +
aContainerFrame->GetContentRectRelativeToSelf().TopLeft();
return frameOffset;
}
// Return true iff |aManager| is a "temporary layer manager". They're
// used for small software rendering tasks, like drawWindow. That's
// currently implemented by a BasicLayerManager without a backing
// widget, and hence in non-retained mode.
inline static bool IsTempLayerManager(LayerManager* aManager) {
return (LayersBackend::LAYERS_BASIC == aManager->GetBackendType() &&
!static_cast<BasicLayerManager*>(aManager)->IsRetained());
}
nsDisplayRemote::nsDisplayRemote(nsDisplayListBuilder* aBuilder,
nsSubDocumentFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame),
mTabId{0},
mEventRegionsOverride(EventRegionsOverride::NoOverride) {
bool frameIsPointerEventsNone = aFrame->StyleUI()->GetEffectivePointerEvents(
aFrame) == StylePointerEvents::None;
if (aBuilder->IsInsidePointerEventsNoneDoc() || frameIsPointerEventsNone) {
mEventRegionsOverride |= EventRegionsOverride::ForceEmptyHitRegion;
}
if (nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(
aFrame->PresShell())) {
mEventRegionsOverride |= EventRegionsOverride::ForceDispatchToContent;
}
nsFrameLoader* frameLoader = GetFrameLoader();
MOZ_ASSERT(frameLoader && frameLoader->IsRemoteFrame());
if (frameLoader->GetRemoteBrowser()) {
mLayersId = frameLoader->GetLayersId();
mTabId = frameLoader->GetRemoteBrowser()->GetTabId();
}
}
mozilla::LayerState nsDisplayRemote::GetLayerState(
nsDisplayListBuilder* aBuilder, LayerManager* aManager,
const ContainerLayerParameters& aParameters) {
if (IsTempLayerManager(aManager)) {
return mozilla::LayerState::LAYER_NONE;
}
return mozilla::LayerState::LAYER_ACTIVE_FORCE;
}
LayerIntSize GetFrameSize(const nsIFrame* aFrame) {
LayoutDeviceSize size = LayoutDeviceRect::FromAppUnits(
aFrame->GetContentRectRelativeToSelf().Size(),
aFrame->PresContext()->AppUnitsPerDevPixel());
float cumulativeResolution = aFrame->PresShell()->GetCumulativeResolution();
return LayerIntSize::Round(size.width * cumulativeResolution,
size.height * cumulativeResolution);
}
already_AddRefed<mozilla::layers::Layer> nsDisplayRemote::BuildLayer(
nsDisplayListBuilder* aBuilder, LayerManager* aManager,
const ContainerLayerParameters& aContainerParameters) {
MOZ_ASSERT(mFrame, "Makes no sense to have a shadow tree without a frame");
if (IsTempLayerManager(aManager)) {
// This can happen if aManager is a "temporary" manager, or if the
// widget's layer manager changed out from under us. We need to
// FIXME handle the former case somehow, probably with an API to
// draw a manager's subtree. The latter is bad bad bad, but the the
// MOZ_ASSERT() above will flag it. Returning nullptr here will just
// cause the shadow subtree not to be rendered.
NS_WARNING("Remote iframe not rendered");
return nullptr;
}
if (!mLayersId.IsValid()) {
return nullptr;
}
if (RefPtr<RemoteBrowser> remoteBrowser =
GetFrameLoader()->GetRemoteBrowser()) {
// Adjust mItemVisibleRect, which is relative to the reference frame, to be
// relative to this frame
nsRect visibleRect;
if (aContainerParameters.mItemVisibleRect) {
visibleRect = *aContainerParameters.mItemVisibleRect;
} else {
visibleRect = GetBuildingRect();
}
visibleRect -= ToReferenceFrame();
nsRect contentRect = Frame()->GetContentRectRelativeToSelf();
visibleRect.IntersectRect(visibleRect, contentRect);
visibleRect -= contentRect.TopLeft();
// Generate an effects update notifying the browser it is visible
aBuilder->AddEffectUpdate(remoteBrowser,
EffectsInfo::VisibleWithinRect(
visibleRect, aContainerParameters.mXScale,
aContainerParameters.mYScale));
// FrameLayerBuilder will take care of notifying the browser when it is no
// longer visible
}
RefPtr<Layer> layer =
aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this);
if (!layer) {
layer = aManager->CreateRefLayer();
}
if (!layer || !layer->AsRefLayer()) {
// Probably a temporary layer manager that doesn't know how to
// use ref layers.
return nullptr;
}
RefLayer* refLayer = layer->AsRefLayer();
nsPoint layerOffset = GetContentRectLayerOffset(Frame(), aBuilder);
nscoord auPerDevPixel = Frame()->PresContext()->AppUnitsPerDevPixel();
LayoutDeviceIntPoint offset =
mozilla::LayoutDeviceIntPoint::FromAppUnitsToNearest(layerOffset,
auPerDevPixel);
// We can only have an offset if we're a child of an inactive
// container, but our display item is LAYER_ACTIVE_FORCE which
// forces all layers above to be active.
MOZ_ASSERT(aContainerParameters.mOffset == nsIntPoint());
Matrix4x4 m = Matrix4x4::Translation(offset.x, offset.y, 0.0);
// Remote content can't be repainted by us, so we multiply down
// the resolution that our container expects onto our container.
m.PostScale(aContainerParameters.mXScale, aContainerParameters.mYScale, 1.0);
refLayer->SetBaseTransform(m);
refLayer->SetEventRegionsOverride(mEventRegionsOverride);
refLayer->SetReferentId(mLayersId);
refLayer->SetRemoteDocumentSize(GetFrameSize(mFrame));
return layer.forget();
}
void nsDisplayRemote::Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) {
nsPresContext* pc = mFrame->PresContext();
nsFrameLoader* fl = GetFrameLoader();
if (pc->GetPrintSettings() && fl->IsRemoteFrame()) {
// See the comment below in CreateWebRenderCommands() as for why doing this.
fl->UpdatePositionAndSize(static_cast<nsSubDocumentFrame*>(mFrame));
}
DrawTarget* target = aCtx->GetDrawTarget();
if (!target->IsRecording() || mTabId == 0) {
NS_WARNING("Remote iframe not rendered");
return;
}
int32_t appUnitsPerDevPixel = pc->AppUnitsPerDevPixel();
Rect destRect =
NSRectToSnappedRect(GetContentRect(), appUnitsPerDevPixel, *target);
target->DrawDependentSurface(mTabId, destRect);
}
bool nsDisplayRemote::CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) {
if (!mLayersId.IsValid()) {
return true;
}
nsPresContext* pc = mFrame->PresContext();
nsFrameLoader* fl = GetFrameLoader();
if (RefPtr<RemoteBrowser> remoteBrowser = fl->GetRemoteBrowser()) {
if (pc->GetPrintSettings()) {
// HACK(emilio): Usually we update sizing/positioning from
// ReflowFinished(). Print documents have no incremental reflow at all
// though, so we can't rely on it firing after a frame becomes remote.
// Thus, if we're painting a remote frame, update its sizing and position
// now.
//
// UpdatePositionAndSize() can cause havoc for non-remote frames but
// luckily we don't care about those, so this is fine.
fl->UpdatePositionAndSize(static_cast<nsSubDocumentFrame*>(mFrame));
}
// Adjust mItemVisibleRect, which is relative to the reference frame, to be
// relative to this frame
nsRect visibleRect = GetBuildingRect() - ToReferenceFrame();
nsRect contentRect = Frame()->GetContentRectRelativeToSelf();
visibleRect.IntersectRect(visibleRect, contentRect);
visibleRect -= contentRect.TopLeft();
// Generate an effects update notifying the browser it is visible
// TODO - Gather scaling factors
aDisplayListBuilder->AddEffectUpdate(
remoteBrowser, EffectsInfo::VisibleWithinRect(visibleRect, 1.0f, 1.0f));
// Create a WebRenderRemoteData to notify the RemoteBrowser when it is no
// longer visible
RefPtr<WebRenderRemoteData> userData =
aManager->CommandBuilder()
.CreateOrRecycleWebRenderUserData<WebRenderRemoteData>(this,
nullptr);
userData->SetRemoteBrowser(remoteBrowser);
}
nscoord auPerDevPixel = pc->AppUnitsPerDevPixel();
nsPoint layerOffset = GetContentRectLayerOffset(mFrame, aDisplayListBuilder);
mOffset = LayoutDevicePoint::FromAppUnits(layerOffset, auPerDevPixel);
nsRect contentRect = mFrame->GetContentRectRelativeToSelf();
contentRect.MoveTo(0, 0);
LayoutDeviceRect rect =
LayoutDeviceRect::FromAppUnits(contentRect, auPerDevPixel);
rect += mOffset;
aBuilder.PushIFrame(mozilla::wr::ToLayoutRect(rect), !BackfaceIsHidden(),
mozilla::wr::AsPipelineId(mLayersId),
/*ignoreMissingPipelines*/ true);
return true;
}
bool nsDisplayRemote::UpdateScrollData(
mozilla::layers::WebRenderScrollData* aData,
mozilla::layers::WebRenderLayerScrollData* aLayerData) {
if (!mLayersId.IsValid()) {
return true;
}
if (aLayerData) {
aLayerData->SetReferentId(mLayersId);
Matrix4x4 m = Matrix4x4::Translation(mOffset.x, mOffset.y, 0.0);
// Apply the top level resolution if we are in the same process of the top
// level document. We don't need to apply it in cases where we are in OOP
// iframes since it will be applied later in
// HitTestingTreeNode::GetTransformToGecko by walking up the tree node.
nsPresContext* inProcessRootContext =
mFrame->PresContext()->GetInProcessRootContentDocumentPresContext();
if (inProcessRootContext &&
inProcessRootContext->IsRootContentDocumentCrossProcess()) {
float resolution = inProcessRootContext->PresShell()->GetResolution();
m.PostScale(resolution, resolution, 1.0);
}
aLayerData->SetTransform(m);
aLayerData->SetEventRegionsOverride(mEventRegionsOverride);
aLayerData->SetRemoteDocumentSize(GetFrameSize(mFrame));
}
return true;
}
nsFrameLoader* nsDisplayRemote::GetFrameLoader() const {
return mFrame ? static_cast<nsSubDocumentFrame*>(mFrame)->FrameLoader()
: nullptr;
}
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