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fune/layout/forms/nsFieldSetFrame.cpp
Glenn Watson 31dabce5a8 Bug 1632409 - Separate image mask API from the generic clip API in WR. r=kats 
Separating out the generic clip definition API into image masks
(and other types in future) makes the serialized data smaller. More
importantly, it will allow us to simplify some of the WR clip internals
in future and optimize the performance spent in clip chain handling.

Differential Revision: https://phabricator.services.mozilla.com/D72125
2020-04-23 20:44:21 +00:00

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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/. */
#include "nsFieldSetFrame.h"
#include "mozilla/dom/HTMLLegendElement.h"
#include <algorithm>
#include "gfxContext.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/Likely.h"
#include "mozilla/PresShell.h"
#include "mozilla/Maybe.h"
#include "nsCSSAnonBoxes.h"
#include "nsCSSFrameConstructor.h"
#include "nsCSSRendering.h"
#include "nsDisplayList.h"
#include "nsGkAtoms.h"
#include "nsIFrameInlines.h"
#include "nsLayoutUtils.h"
#include "nsLegendFrame.h"
#include "nsStyleConsts.h"
using namespace mozilla;
using namespace mozilla::gfx;
using namespace mozilla::layout;
nsContainerFrame* NS_NewFieldSetFrame(PresShell* aPresShell,
ComputedStyle* aStyle) {
return new (aPresShell) nsFieldSetFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsFieldSetFrame)
NS_QUERYFRAME_HEAD(nsFieldSetFrame)
NS_QUERYFRAME_ENTRY(nsFieldSetFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
nsFieldSetFrame::nsFieldSetFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID),
mLegendRect(GetWritingMode()) {
mLegendSpace = 0;
}
nsRect nsFieldSetFrame::VisualBorderRectRelativeToSelf() const {
WritingMode wm = GetWritingMode();
LogicalRect r(wm, LogicalPoint(wm, 0, 0), GetLogicalSize(wm));
nsSize containerSize = r.Size(wm).GetPhysicalSize(wm);
nsIFrame* legend = GetLegend();
if (legend && !GetPrevInFlow()) {
nscoord legendSize = legend->GetLogicalSize(wm).BSize(wm);
auto legendMargin = legend->GetLogicalUsedMargin(wm);
nscoord legendStartMargin = legendMargin.BStart(wm);
nscoord legendEndMargin = legendMargin.BEnd(wm);
nscoord border = GetUsedBorder().Side(wm.PhysicalSide(eLogicalSideBStart));
// Calculate the offset from the border area block-axis start edge needed to
// center-align our border with the legend's border-box (in the block-axis).
nscoord off = (legendStartMargin + legendSize / 2) - border / 2;
// We don't want to display our border above our border area.
if (off > nscoord(0)) {
nscoord marginBoxSize = legendStartMargin + legendSize + legendEndMargin;
if (marginBoxSize > border) {
// We don't want to display our border below the legend's margin-box,
// so we align it to the block-axis end if that happens.
nscoord overflow = off + border - marginBoxSize;
if (overflow > nscoord(0)) {
off -= overflow;
}
r.BStart(wm) += off;
r.BSize(wm) -= off;
}
}
}
return r.GetPhysicalRect(wm, containerSize);
}
nsContainerFrame* nsFieldSetFrame::GetInner() const {
for (nsIFrame* child : mFrames) {
if (child->Style()->GetPseudoType() == PseudoStyleType::fieldsetContent) {
return static_cast<nsContainerFrame*>(child);
}
}
return nullptr;
}
nsIFrame* nsFieldSetFrame::GetLegend() const {
for (nsIFrame* child : mFrames) {
if (child->Style()->GetPseudoType() != PseudoStyleType::fieldsetContent) {
return child;
}
}
return nullptr;
}
class nsDisplayFieldSetBorder final : public nsPaintedDisplayItem {
public:
nsDisplayFieldSetBorder(nsDisplayListBuilder* aBuilder,
nsFieldSetFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayFieldSetBorder);
}
MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayFieldSetBorder)
virtual void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override;
virtual nsDisplayItemGeometry* AllocateGeometry(
nsDisplayListBuilder* aBuilder) override;
virtual void ComputeInvalidationRegion(
nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion) const override;
bool CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) override;
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) const override;
NS_DISPLAY_DECL_NAME("FieldSetBorder", TYPE_FIELDSET_BORDER_BACKGROUND)
};
void nsDisplayFieldSetBorder::Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) {
image::ImgDrawResult result =
static_cast<nsFieldSetFrame*>(mFrame)->PaintBorder(
aBuilder, *aCtx, ToReferenceFrame(), GetPaintRect());
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
}
nsDisplayItemGeometry* nsDisplayFieldSetBorder::AllocateGeometry(
nsDisplayListBuilder* aBuilder) {
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}
void nsDisplayFieldSetBorder::ComputeInvalidationRegion(
nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion) const {
auto geometry =
static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
if (aBuilder->ShouldSyncDecodeImages() &&
geometry->ShouldInvalidateToSyncDecodeImages()) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}
nsRect nsDisplayFieldSetBorder::GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) const {
// Just go ahead and claim our frame's overflow rect as the bounds, because we
// may have border-image-outset or other features that cause borders to extend
// outside the border rect. We could try to duplicate all the complexity
// nsDisplayBorder has here, but keeping things in sync would be a pain, and
// this code is not typically performance-sensitive.
*aSnap = false;
return Frame()->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
}
bool nsDisplayFieldSetBorder::CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) {
auto frame = static_cast<nsFieldSetFrame*>(mFrame);
auto offset = ToReferenceFrame();
nsRect rect;
Maybe<wr::SpaceAndClipChainHelper> clipOut;
if (nsIFrame* legend = frame->GetLegend()) {
rect = frame->VisualBorderRectRelativeToSelf() + offset;
nsRect legendRect = legend->GetNormalRect() + offset;
// Make sure we clip all of the border in case the legend is smaller.
nscoord borderTopWidth = frame->GetUsedBorder().top;
if (legendRect.height < borderTopWidth) {
legendRect.height = borderTopWidth;
legendRect.y = offset.y;
}
if (!legendRect.IsEmpty()) {
// We need to clip out the part of the border where the legend would go
auto appUnitsPerDevPixel = frame->PresContext()->AppUnitsPerDevPixel();
auto layoutRect = wr::ToLayoutRect(LayoutDeviceRect::FromAppUnits(
frame->GetVisualOverflowRectRelativeToSelf() + offset,
appUnitsPerDevPixel));
wr::ComplexClipRegion region;
region.rect = wr::ToLayoutRect(
LayoutDeviceRect::FromAppUnits(legendRect, appUnitsPerDevPixel));
region.mode = wr::ClipMode::ClipOut;
region.radii = wr::EmptyBorderRadius();
nsTArray<mozilla::wr::ComplexClipRegion> array{region};
auto clip = aBuilder.DefineClip(Nothing(), layoutRect, &array);
auto clipChain = aBuilder.DefineClipChain({clip}, true);
clipOut.emplace(aBuilder, clipChain);
}
} else {
rect = nsRect(offset, frame->GetRect().Size());
}
ImgDrawResult drawResult = nsCSSRendering::CreateWebRenderCommandsForBorder(
this, mFrame, rect, aBuilder, aResources, aSc, aManager,
aDisplayListBuilder);
if (drawResult == ImgDrawResult::NOT_SUPPORTED) {
return false;
}
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, drawResult);
return true;
};
void nsFieldSetFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
// Paint our background and border in a special way.
// REVIEW: We don't really need to check frame emptiness here; if it's empty,
// the background/border display item won't do anything, and if it isn't
// empty, we need to paint the outline
if (!(GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) &&
IsVisibleForPainting()) {
DisplayOutsetBoxShadowUnconditional(aBuilder, aLists.BorderBackground());
const nsRect rect =
VisualBorderRectRelativeToSelf() + aBuilder->ToReferenceFrame(this);
nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
aBuilder, this, rect, aLists.BorderBackground(),
/* aAllowWillPaintBorderOptimization = */ false);
aLists.BorderBackground()->AppendNewToTop<nsDisplayFieldSetBorder>(aBuilder,
this);
DisplayOutlineUnconditional(aBuilder, aLists);
DO_GLOBAL_REFLOW_COUNT_DSP("nsFieldSetFrame");
}
if (GetPrevInFlow()) {
DisplayOverflowContainers(aBuilder, aLists);
}
nsDisplayListCollection contentDisplayItems(aBuilder);
if (nsIFrame* inner = GetInner()) {
// Collect the inner frame's display items into their own collection.
// We need to be calling BuildDisplayList on it before the legend in
// case it contains out-of-flow frames whose placeholders are in the
// legend. However, we want the inner frame's display items to be
// after the legend's display items in z-order, so we need to save them
// and append them later.
BuildDisplayListForChild(aBuilder, inner, contentDisplayItems);
}
if (nsIFrame* legend = GetLegend()) {
// The legend's background goes on our BlockBorderBackgrounds list because
// it's a block child.
nsDisplayListSet set(aLists, aLists.BlockBorderBackgrounds());
BuildDisplayListForChild(aBuilder, legend, set);
}
// Put the inner frame's display items on the master list. Note that this
// moves its border/background display items to our BorderBackground() list,
// which isn't really correct, but it's OK because the inner frame is
// anonymous and can't have its own border and background.
contentDisplayItems.MoveTo(aLists);
}
image::ImgDrawResult nsFieldSetFrame::PaintBorder(
nsDisplayListBuilder* aBuilder, gfxContext& aRenderingContext, nsPoint aPt,
const nsRect& aDirtyRect) {
// If the border is smaller than the legend, move the border down
// to be centered on the legend. We call VisualBorderRectRelativeToSelf() to
// compute the border positioning.
// FIXME: This means border-radius clamping is incorrect; we should
// override nsIFrame::GetBorderRadii.
nsRect rect = VisualBorderRectRelativeToSelf() + aPt;
nsPresContext* presContext = PresContext();
const auto skipSides = GetSkipSides();
PaintBorderFlags borderFlags = aBuilder->ShouldSyncDecodeImages()
? PaintBorderFlags::SyncDecodeImages
: PaintBorderFlags();
ImgDrawResult result = ImgDrawResult::SUCCESS;
nsCSSRendering::PaintBoxShadowInner(presContext, aRenderingContext, this,
rect);
if (nsIFrame* legend = GetLegend()) {
// We want to avoid drawing our border under the legend, so clip out the
// legend while drawing our border. We don't want to use mLegendRect here,
// because we do want to draw our border under the legend's inline-start and
// -end margins. And we use GetNormalRect(), not GetRect(), because we do
// not want relative positioning applied to the legend to change how our
// border looks.
nsRect legendRect = legend->GetNormalRect() + aPt;
// Make sure we clip all of the border in case the legend is smaller.
nscoord borderTopWidth = GetUsedBorder().top;
if (legendRect.height < borderTopWidth) {
legendRect.height = borderTopWidth;
legendRect.y = aPt.y;
}
DrawTarget* drawTarget = aRenderingContext.GetDrawTarget();
// We set up a clip path which has our rect clockwise and the legend rect
// counterclockwise, with FILL_WINDING as the fill rule. That will allow us
// to paint within our rect but outside the legend rect. For "our rect" we
// use our visual overflow rect (relative to ourselves, so it's not affected
// by transforms), because we can have borders sticking outside our border
// box (e.g. due to border-image-outset).
RefPtr<PathBuilder> pathBuilder =
drawTarget->CreatePathBuilder(FillRule::FILL_WINDING);
int32_t appUnitsPerDevPixel = presContext->AppUnitsPerDevPixel();
AppendRectToPath(
pathBuilder,
NSRectToSnappedRect(GetVisualOverflowRectRelativeToSelf() + aPt,
appUnitsPerDevPixel, *drawTarget),
true);
AppendRectToPath(
pathBuilder,
NSRectToSnappedRect(legendRect, appUnitsPerDevPixel, *drawTarget),
false);
RefPtr<Path> clipPath = pathBuilder->Finish();
aRenderingContext.Save();
aRenderingContext.Clip(clipPath);
result &= nsCSSRendering::PaintBorder(presContext, aRenderingContext, this,
aDirtyRect, rect, mComputedStyle,
borderFlags, skipSides);
aRenderingContext.Restore();
} else {
result &= nsCSSRendering::PaintBorder(
presContext, aRenderingContext, this, aDirtyRect,
nsRect(aPt, mRect.Size()), mComputedStyle, borderFlags, skipSides);
}
return result;
}
nscoord nsFieldSetFrame::GetIntrinsicISize(
gfxContext* aRenderingContext, nsLayoutUtils::IntrinsicISizeType aType) {
nscoord legendWidth = 0;
nscoord contentWidth = 0;
if (!StyleDisplay()->IsContainSize()) {
// Both inner and legend are children, and if the fieldset is
// size-contained they should not contribute to the intrinsic size.
if (nsIFrame* legend = GetLegend()) {
legendWidth = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
legend, aType);
}
if (nsIFrame* inner = GetInner()) {
// Ignore padding on the inner, since the padding will be applied to the
// outer instead, and the padding computed for the inner is wrong
// for percentage padding.
contentWidth = nsLayoutUtils::IntrinsicForContainer(
aRenderingContext, inner, aType, nsLayoutUtils::IGNORE_PADDING);
}
}
return std::max(legendWidth, contentWidth);
}
nscoord nsFieldSetFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord result = 0;
DISPLAY_MIN_INLINE_SIZE(this, result);
result = GetIntrinsicISize(aRenderingContext, nsLayoutUtils::MIN_ISIZE);
return result;
}
nscoord nsFieldSetFrame::GetPrefISize(gfxContext* aRenderingContext) {
nscoord result = 0;
DISPLAY_PREF_INLINE_SIZE(this, result);
result = GetIntrinsicISize(aRenderingContext, nsLayoutUtils::PREF_ISIZE);
return result;
}
/* virtual */
void nsFieldSetFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
using LegendAlignValue = mozilla::dom::HTMLLegendElement::LegendAlignValue;
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsFieldSetFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
NS_WARNING_ASSERTION(aReflowInput.ComputedISize() != NS_UNCONSTRAINEDSIZE,
"Should have a precomputed inline-size!");
nsOverflowAreas ocBounds;
nsReflowStatus ocStatus;
auto* prevInFlow = static_cast<nsFieldSetFrame*>(GetPrevInFlow());
if (prevInFlow) {
ReflowOverflowContainerChildren(aPresContext, aReflowInput, ocBounds,
ReflowChildFlags::Default, ocStatus);
AutoFrameListPtr prevOverflowFrames(PresContext(),
prevInFlow->StealOverflowFrames());
if (prevOverflowFrames) {
nsContainerFrame::ReparentFrameViewList(*prevOverflowFrames, prevInFlow,
this);
mFrames.InsertFrames(this, nullptr, *prevOverflowFrames);
}
}
bool reflowInner;
bool reflowLegend;
nsIFrame* legend = GetLegend();
nsContainerFrame* inner = GetInner();
if (!legend || !inner) {
if (DrainSelfOverflowList()) {
legend = GetLegend();
inner = GetInner();
}
}
if (aReflowInput.ShouldReflowAllKids() || GetNextInFlow()) {
reflowInner = inner != nullptr;
reflowLegend = legend != nullptr;
} else {
reflowInner = inner && NS_SUBTREE_DIRTY(inner);
reflowLegend = legend && NS_SUBTREE_DIRTY(legend);
}
// @note |this| frame applies borders but not any padding. Our anonymous
// inner frame applies the padding (but not borders).
const auto wm = GetWritingMode();
LogicalMargin border = aReflowInput.ComputedLogicalBorderPadding() -
aReflowInput.ComputedLogicalPadding();
auto skipSides = PreReflowBlockLevelLogicalSkipSides();
border.ApplySkipSides(skipSides);
LogicalSize availSize(wm, aReflowInput.ComputedSize().ISize(wm),
aReflowInput.AvailableBSize());
// Figure out how big the legend is if there is one.
LogicalMargin legendMargin(wm);
Maybe<ReflowInput> legendReflowInput;
if (legend) {
const auto legendWM = legend->GetWritingMode();
LogicalSize legendAvailSize = availSize.ConvertTo(legendWM, wm);
legendReflowInput.emplace(aPresContext, aReflowInput, legend,
legendAvailSize);
}
const bool avoidBreakInside = ShouldAvoidBreakInside(aReflowInput);
if (reflowLegend) {
ReflowOutput legendDesiredSize(aReflowInput);
// We'll move the legend to its proper place later, so the position
// and containerSize passed here are unimportant.
const nsSize dummyContainerSize;
ReflowChild(legend, aPresContext, legendDesiredSize, *legendReflowInput, wm,
LogicalPoint(wm), dummyContainerSize,
ReflowChildFlags::NoMoveFrame, aStatus);
if (!prevInFlow && !aReflowInput.mFlags.mIsTopOfPage &&
aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE) {
// Propagate break-before from the legend to the fieldset.
if (legend->StyleDisplay()->BreakBefore() ||
aStatus.IsInlineBreakBefore()) {
// XXX(mats) setting a desired size shouldn't be necessary: bug 1599159.
aDesiredSize.SetSize(wm, LogicalSize(wm));
aStatus.SetInlineLineBreakBeforeAndReset();
return;
}
// Honor break-inside:avoid by breaking before instead.
if (MOZ_UNLIKELY(avoidBreakInside) && !aStatus.IsFullyComplete()) {
aDesiredSize.SetSize(wm, LogicalSize(wm));
aStatus.SetInlineLineBreakBeforeAndReset();
return;
}
}
// Calculate the legend's margin-box rectangle.
legendMargin = legend->GetLogicalUsedMargin(wm);
mLegendRect = LogicalRect(
wm, 0, 0, legendDesiredSize.ISize(wm) + legendMargin.IStartEnd(wm),
legendDesiredSize.BSize(wm) + legendMargin.BStartEnd(wm));
// We subtract mLegendSpace from inner's content-box block-size below.
nscoord oldSpace = mLegendSpace;
mLegendSpace = 0;
nscoord borderBStart = border.BStart(wm);
if (!prevInFlow) {
if (mLegendRect.BSize(wm) > borderBStart) {
mLegendSpace = mLegendRect.BSize(wm) - borderBStart;
} else {
// Calculate the border-box position that would center the legend's
// border-box within the fieldset border:
nscoord off = (borderBStart - legendDesiredSize.BSize(wm)) / 2;
off -= legendMargin.BStart(wm); // convert to a margin-box position
if (off > nscoord(0)) {
// Align the legend to the end if center-aligning it would overflow.
nscoord overflow = off + mLegendRect.BSize(wm) - borderBStart;
if (overflow > nscoord(0)) {
off -= overflow;
}
mLegendRect.BStart(wm) += off;
}
}
} else {
mLegendSpace = mLegendRect.BSize(wm);
}
// If mLegendSpace changes then we need to reflow |inner| as well.
if (mLegendSpace != oldSpace && inner) {
reflowInner = true;
}
FinishReflowChild(legend, aPresContext, legendDesiredSize,
legendReflowInput.ptr(), wm, LogicalPoint(wm),
dummyContainerSize, ReflowChildFlags::NoMoveFrame);
EnsureChildContinuation(legend, aStatus);
if (aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE &&
!legend->GetWritingMode().IsOrthogonalTo(wm) &&
legend->StyleDisplay()->BreakAfter() &&
(!legendReflowInput->mFlags.mIsTopOfPage ||
mLegendRect.BSize(wm) > 0) &&
aStatus.IsComplete()) {
// Pretend that we ran out of space to push children of |inner|.
// XXX(mats) perhaps pushing the inner frame would be more correct,
// but we don't support that yet.
availSize.BSize(wm) = nscoord(0);
aStatus.Reset();
aStatus.SetIncomplete();
}
} else if (!legend) {
mLegendRect.SetEmpty();
mLegendSpace = 0;
} else {
// mLegendSpace and mLegendRect haven't changed, but we need
// the used margin when placing the legend.
legendMargin = legend->GetLogicalUsedMargin(wm);
}
// This containerSize is incomplete as yet: it does not include the size
// of the |inner| frame itself.
nsSize containerSize =
(LogicalSize(wm, 0, mLegendSpace) + border.Size(wm)).GetPhysicalSize(wm);
if (reflowInner) {
LogicalSize innerAvailSize = availSize;
innerAvailSize.ISize(wm) = aReflowInput.ComputedSizeWithPadding().ISize(wm);
nscoord remainingComputedBSize = aReflowInput.ComputedBSize();
if (prevInFlow && remainingComputedBSize != NS_UNCONSTRAINEDSIZE) {
// Subtract the consumed BSize associated with the legend.
for (nsIFrame* prev = prevInFlow; prev; prev = prev->GetPrevInFlow()) {
auto* prevFieldSet = static_cast<nsFieldSetFrame*>(prev);
remainingComputedBSize -= prevFieldSet->mLegendSpace;
}
remainingComputedBSize = std::max(0, remainingComputedBSize);
}
if (innerAvailSize.BSize(wm) != NS_UNCONSTRAINEDSIZE) {
innerAvailSize.BSize(wm) -=
std::max(mLegendRect.BSize(wm), border.BStart(wm));
if (StyleBorder()->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Clone &&
(aReflowInput.ComputedBSize() == NS_UNCONSTRAINEDSIZE ||
remainingComputedBSize +
aReflowInput.ComputedLogicalBorderPadding().BStartEnd(wm) >=
availSize.BSize(wm))) {
innerAvailSize.BSize(wm) -= border.BEnd(wm);
}
innerAvailSize.BSize(wm) = std::max(0, innerAvailSize.BSize(wm));
}
ReflowInput kidReflowInput(aPresContext, aReflowInput, inner,
innerAvailSize, Nothing(),
ReflowInput::CALLER_WILL_INIT);
// Override computed padding, in case it's percentage padding
kidReflowInput.Init(aPresContext, Nothing(), nullptr,
&aReflowInput.ComputedPhysicalPadding());
if (kidReflowInput.mFlags.mIsTopOfPage) {
// Prevent break-before from |inner| if we have a legend.
kidReflowInput.mFlags.mIsTopOfPage = !legend;
}
// Our child is "height:100%" but we actually want its height to be reduced
// by the amount of content-height the legend is eating up, unless our
// height is unconstrained (in which case the child's will be too).
if (aReflowInput.ComputedBSize() != NS_UNCONSTRAINEDSIZE) {
kidReflowInput.SetComputedBSize(
std::max(0, remainingComputedBSize - mLegendSpace));
}
if (aReflowInput.ComputedMinBSize() > 0) {
kidReflowInput.ComputedMinBSize() =
std::max(0, aReflowInput.ComputedMinBSize() - mLegendSpace);
}
if (aReflowInput.ComputedMaxBSize() != NS_UNCONSTRAINEDSIZE) {
kidReflowInput.ComputedMaxBSize() =
std::max(0, aReflowInput.ComputedMaxBSize() - mLegendSpace);
}
ReflowOutput kidDesiredSize(kidReflowInput);
NS_ASSERTION(
kidReflowInput.ComputedPhysicalMargin() == nsMargin(0, 0, 0, 0),
"Margins on anonymous fieldset child not supported!");
LogicalPoint pt(wm, border.IStart(wm), border.BStart(wm) + mLegendSpace);
// We don't know the correct containerSize until we have reflowed |inner|,
// so we use a dummy value for now; FinishReflowChild will fix the position
// if necessary.
const nsSize dummyContainerSize;
nsReflowStatus status;
// If our legend needs a continuation then *this* frame will have
// a continuation as well so we should keep our inner frame continuations
// too (even if 'inner' ends up being COMPLETE here). This ensures that
// our continuation will have a reasonable inline-size.
ReflowChildFlags flags = aStatus.IsFullyComplete()
? ReflowChildFlags::Default
: ReflowChildFlags::NoDeleteNextInFlowChild;
ReflowChild(inner, aPresContext, kidDesiredSize, kidReflowInput, wm, pt,
dummyContainerSize, flags, status);
// Honor break-inside:avoid when possible by returning a BreakBefore status.
if (MOZ_UNLIKELY(avoidBreakInside) && !prevInFlow &&
!aReflowInput.mFlags.mIsTopOfPage &&
availSize.BSize(wm) != NS_UNCONSTRAINEDSIZE) {
if (status.IsInlineBreakBefore() || !status.IsFullyComplete()) {
aDesiredSize.SetSize(wm, LogicalSize(wm));
aStatus.SetInlineLineBreakBeforeAndReset();
return;
}
}
// Update containerSize to account for size of the inner frame, so that
// FinishReflowChild can position it correctly.
containerSize += kidDesiredSize.PhysicalSize();
FinishReflowChild(inner, aPresContext, kidDesiredSize, &kidReflowInput, wm,
pt, containerSize, ReflowChildFlags::Default);
EnsureChildContinuation(inner, status);
aStatus.MergeCompletionStatusFrom(status);
NS_FRAME_TRACE_REFLOW_OUT("FieldSet::Reflow", aStatus);
} else if (inner) {
// |inner| didn't need to be reflowed but we do need to include its size
// in containerSize.
containerSize += inner->GetSize();
} else {
// No |inner| means it was already complete in an earlier continuation.
MOZ_ASSERT(prevInFlow, "first-in-flow should always have an inner frame");
for (nsIFrame* prev = prevInFlow; prev; prev = prev->GetPrevInFlow()) {
auto* prevFieldSet = static_cast<nsFieldSetFrame*>(prev);
if (auto* prevInner = prevFieldSet->GetInner()) {
containerSize += prevInner->GetSize();
break;
}
}
}
LogicalRect contentRect(wm);
if (inner) {
// We don't support margins on inner, so our content rect is just the
// inner's border-box. (We don't really care about container size at this
// point, as we'll figure out the actual positioning later.)
contentRect = inner->GetLogicalRect(wm, containerSize);
} else if (prevInFlow) {
auto size = prevInFlow->GetPaddingRectRelativeToSelf().Size();
contentRect.ISize(wm) = wm.IsVertical() ? size.height : size.width;
}
if (legend) {
// The legend is positioned inline-wards within the inner's content rect
// (so that padding on the fieldset affects the legend position).
LogicalRect innerContentRect = contentRect;
innerContentRect.Deflate(wm, aReflowInput.ComputedLogicalPadding());
// If the inner content rect is larger than the legend, we can align the
// legend.
if (innerContentRect.ISize(wm) > mLegendRect.ISize(wm)) {
// NOTE legend @align values are: left/right/center
// GetLogicalAlign converts left/right to start/end for the given WM.
// @see HTMLLegendElement::ParseAttribute, nsLegendFrame::GetLogicalAlign
LegendAlignValue align =
static_cast<nsLegendFrame*>(legend->GetContentInsertionFrame())
->GetLogicalAlign(wm);
switch (align) {
case LegendAlignValue::InlineEnd:
mLegendRect.IStart(wm) =
innerContentRect.IEnd(wm) - mLegendRect.ISize(wm);
break;
case LegendAlignValue::Center:
// Note: rounding removed; there doesn't seem to be any need
mLegendRect.IStart(wm) =
innerContentRect.IStart(wm) +
(innerContentRect.ISize(wm) - mLegendRect.ISize(wm)) / 2;
break;
case LegendAlignValue::InlineStart:
mLegendRect.IStart(wm) = innerContentRect.IStart(wm);
break;
default:
MOZ_ASSERT_UNREACHABLE("unexpected GetLogicalAlign value");
}
} else {
// otherwise just start-align it.
mLegendRect.IStart(wm) = innerContentRect.IStart(wm);
}
// place the legend
LogicalRect actualLegendRect = mLegendRect;
actualLegendRect.Deflate(wm, legendMargin);
LogicalPoint actualLegendPos(actualLegendRect.Origin(wm));
// Note that legend's writing mode may be different from the fieldset's,
// so we need to convert offsets before applying them to it (bug 1134534).
LogicalMargin offsets =
legendReflowInput->ComputedLogicalOffsets().ConvertTo(
wm, legendReflowInput->GetWritingMode());
ReflowInput::ApplyRelativePositioning(legend, wm, offsets, &actualLegendPos,
containerSize);
legend->SetPosition(wm, actualLegendPos, containerSize);
nsContainerFrame::PositionFrameView(legend);
nsContainerFrame::PositionChildViews(legend);
}
// Skip our block-end border if we're INCOMPLETE.
if (!aStatus.IsComplete() &&
StyleBorder()->mBoxDecorationBreak != StyleBoxDecorationBreak::Clone) {
border.BEnd(wm) = nscoord(0);
}
// Return our size and our result.
LogicalSize finalSize(
wm, contentRect.ISize(wm) + border.IStartEnd(wm),
mLegendSpace + border.BStartEnd(wm) + (inner ? inner->BSize(wm) : 0));
if (aReflowInput.mStyleDisplay->IsContainSize()) {
// If we're size-contained, then we must set finalSize to be what
// it'd be if we had no children (i.e. if we had no legend and if
// 'inner' were empty). Note: normally the fieldset's own padding
// (which we still must honor) would be accounted for as part of
// inner's size (see kidReflowInput.Init() call above). So: since
// we're disregarding sizing information from 'inner', we need to
// account for that padding ourselves here.
nscoord contentBoxBSize =
aReflowInput.ComputedBSize() == NS_UNCONSTRAINEDSIZE
? aReflowInput.ApplyMinMaxBSize(0)
: aReflowInput.ComputedBSize();
finalSize.BSize(wm) =
contentBoxBSize +
aReflowInput.ComputedLogicalBorderPadding().BStartEnd(wm);
}
if (aStatus.IsComplete() &&
aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE &&
finalSize.BSize(wm) > aReflowInput.AvailableBSize() &&
border.BEnd(wm) > 0 && aReflowInput.AvailableBSize() > border.BEnd(wm)) {
// Our end border doesn't fit but it should fit in the next column/page.
if (MOZ_UNLIKELY(avoidBreakInside)) {
aDesiredSize.SetSize(wm, LogicalSize(wm));
aStatus.SetInlineLineBreakBeforeAndReset();
return;
} else {
if (StyleBorder()->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Slice) {
finalSize.BSize(wm) -= border.BEnd(wm);
}
aStatus.SetIncomplete();
}
}
if (!aStatus.IsComplete()) {
MOZ_ASSERT(aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE,
"must be Complete in an unconstrained available block-size");
// Stretch our BSize to fill the fragmentainer.
finalSize.BSize(wm) =
std::max(finalSize.BSize(wm), aReflowInput.AvailableBSize());
}
aDesiredSize.SetSize(wm, finalSize);
aDesiredSize.SetOverflowAreasToDesiredBounds();
if (legend) {
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, legend);
}
if (inner) {
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, inner);
}
// Merge overflow container bounds and status.
aDesiredSize.mOverflowAreas.UnionWith(ocBounds);
aStatus.MergeCompletionStatusFrom(ocStatus);
FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aReflowInput,
aStatus);
InvalidateFrame();
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
#ifdef DEBUG
void nsFieldSetFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) {
nsContainerFrame::SetInitialChildList(aListID, aChildList);
MOZ_ASSERT(aListID != kPrincipalList || GetInner(),
"Setting principal child list should populate our inner frame");
}
void nsFieldSetFrame::AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) {
MOZ_CRASH("nsFieldSetFrame::AppendFrames not supported");
}
void nsFieldSetFrame::InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList& aFrameList) {
MOZ_CRASH("nsFieldSetFrame::InsertFrames not supported");
}
void nsFieldSetFrame::RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) {
MOZ_CRASH("nsFieldSetFrame::RemoveFrame not supported");
}
#endif
#ifdef ACCESSIBILITY
a11y::AccType nsFieldSetFrame::AccessibleType() {
return a11y::eHTMLGroupboxType;
}
#endif
nscoord nsFieldSetFrame::GetLogicalBaseline(WritingMode aWM) const {
switch (StyleDisplay()->DisplayInside()) {
case mozilla::StyleDisplayInside::Grid:
case mozilla::StyleDisplayInside::Flex:
return BaselineBOffset(aWM, BaselineSharingGroup::First,
AlignmentContext::Inline);
default:
return BSize(aWM) - BaselineBOffset(aWM, BaselineSharingGroup::Last,
AlignmentContext::Inline);
}
}
bool nsFieldSetFrame::GetVerticalAlignBaseline(WritingMode aWM,
nscoord* aBaseline) const {
if (StyleDisplay()->IsContainLayout()) {
// If we are layout-contained, our child 'inner' should not
// affect how we calculate our baseline.
return false;
}
nsIFrame* inner = GetInner();
if (MOZ_UNLIKELY(!inner)) {
return false;
}
MOZ_ASSERT(!inner->GetWritingMode().IsOrthogonalTo(aWM));
if (!inner->GetVerticalAlignBaseline(aWM, aBaseline)) {
return false;
}
nscoord innerBStart = inner->BStart(aWM, GetSize());
*aBaseline += innerBStart;
return true;
}
bool nsFieldSetFrame::GetNaturalBaselineBOffset(
WritingMode aWM, BaselineSharingGroup aBaselineGroup,
nscoord* aBaseline) const {
if (StyleDisplay()->IsContainLayout()) {
// If we are layout-contained, our child 'inner' should not
// affect how we calculate our baseline.
return false;
}
nsIFrame* inner = GetInner();
if (MOZ_UNLIKELY(!inner)) {
return false;
}
MOZ_ASSERT(!inner->GetWritingMode().IsOrthogonalTo(aWM));
if (!inner->GetNaturalBaselineBOffset(aWM, aBaselineGroup, aBaseline)) {
return false;
}
nscoord innerBStart = inner->BStart(aWM, GetSize());
if (aBaselineGroup == BaselineSharingGroup::First) {
*aBaseline += innerBStart;
} else {
*aBaseline += BSize(aWM) - (innerBStart + inner->BSize(aWM));
}
return true;
}
void nsFieldSetFrame::AppendDirectlyOwnedAnonBoxes(
nsTArray<OwnedAnonBox>& aResult) {
if (nsIFrame* kid = GetInner()) {
aResult.AppendElement(OwnedAnonBox(kid));
}
}
void nsFieldSetFrame::EnsureChildContinuation(nsIFrame* aChild,
const nsReflowStatus& aStatus) {
MOZ_ASSERT(aChild == GetLegend() || aChild == GetInner(),
"unexpected child frame");
nsIFrame* nif = aChild->GetNextInFlow();
if (aStatus.IsFullyComplete()) {
if (nif) {
// NOTE: we want to avoid our DEBUG version of RemoveFrame above.
nsContainerFrame::RemoveFrame(kNoReflowPrincipalList, nif);
MOZ_ASSERT(!aChild->GetNextInFlow());
}
} else {
nsFrameList nifs;
if (!nif) {
auto* fc = PresShell()->FrameConstructor();
nif = fc->CreateContinuingFrame(aChild, this);
if (aStatus.IsOverflowIncomplete()) {
nif->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
}
nifs = nsFrameList(nif, nif);
} else {
// Steal all nifs and push them again in case they are currently on
// the wrong list.
for (nsIFrame* n = nif; n; n = n->GetNextInFlow()) {
n->GetParent()->StealFrame(n);
nifs.AppendFrame(this, n);
if (aStatus.IsOverflowIncomplete()) {
n->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
} else {
n->RemoveStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
}
}
}
if (aStatus.IsOverflowIncomplete()) {
if (nsFrameList* eoc =
GetPropTableFrames(ExcessOverflowContainersProperty())) {
eoc->AppendFrames(nullptr, nifs);
} else {
SetPropTableFrames(new (PresShell()) nsFrameList(nifs),
ExcessOverflowContainersProperty());
}
} else {
if (nsFrameList* oc = GetOverflowFrames()) {
oc->AppendFrames(nullptr, nifs);
} else {
SetOverflowFrames(nifs);
}
}
}
}
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