mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/layout/forms/nsFieldSetFrame.cpp

913 строки
37 KiB
C++
Исходник Ответственный История

/* -*- 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/Baseline.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/Likely.h"
#include "mozilla/PresShell.h"
#include "mozilla/Maybe.h"
#include "mozilla/webrender/WebRenderAPI.h"
#include "mozilla/ScrollContainerFrame.h"
#include "nsBlockFrame.h"
#include "nsCSSAnonBoxes.h"
#include "nsCSSFrameConstructor.h"
#include "nsCSSRendering.h"
#include "nsDisplayList.h"
#include "nsGkAtoms.h"
#include "nsIFrameInlines.h"
#include "nsLayoutUtils.h"
#include "nsStyleConsts.h"
using namespace mozilla;
using namespace mozilla::gfx;
using namespace mozilla::layout;
using image::ImgDrawResult;
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(LogicalSide::BStart));
// 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;
}
namespace mozilla {
class nsDisplayFieldSetBorder final : public nsPaintedDisplayItem {
public:
nsDisplayFieldSetBorder(nsDisplayListBuilder* aBuilder,
nsFieldSetFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayFieldSetBorder);
}
MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayFieldSetBorder)
void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) 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) {
Unused << static_cast<nsFieldSetFrame*>(mFrame)->PaintBorder(
aBuilder, *aCtx, ToReferenceFrame(), GetPaintRect(aBuilder, aCtx));
}
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()->InkOverflowRectRelativeToSelf() + 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();
Maybe<wr::SpaceAndClipChainHelper> clipOut;
nsRect rect = frame->VisualBorderRectRelativeToSelf() + offset;
nsDisplayBoxShadowInner::CreateInsetBoxShadowWebRenderCommands(
aBuilder, aSc, rect, mFrame, rect);
if (nsIFrame* legend = frame->GetLegend()) {
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->InkOverflowRectRelativeToSelf() + offset,
appUnitsPerDevPixel));
wr::ComplexClipRegion region;
region.rect = wr::ToLayoutRect(
LayoutDeviceRect::FromAppUnits(legendRect, appUnitsPerDevPixel));
region.mode = wr::ClipMode::ClipOut;
region.radii = wr::EmptyBorderRadius();
auto rect_clip = aBuilder.DefineRectClip(Nothing(), layoutRect);
auto complex_clip = aBuilder.DefineRoundedRectClip(Nothing(), region);
auto clipChain =
aBuilder.DefineClipChain({rect_clip, complex_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;
}
return true;
};
} // namespace mozilla
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 (!HasAnyStateBits(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);
}
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 ink 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(InkOverflowRectRelativeToSelf() + 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::IntrinsicISize(const IntrinsicSizeInput& aInput,
IntrinsicISizeType aType) {
// Both inner and legend are children, and if the fieldset is
// size-contained they should not contribute to the intrinsic size.
if (Maybe<nscoord> containISize = ContainIntrinsicISize()) {
return *containISize;
}
nscoord legendWidth = 0;
if (nsIFrame* legend = GetLegend()) {
legendWidth =
nsLayoutUtils::IntrinsicForContainer(aInput.mContext, legend, aType);
}
nscoord contentWidth = 0;
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(
aInput.mContext, inner, aType, Nothing(),
nsLayoutUtils::IGNORE_PADDING);
}
return std::max(legendWidth, contentWidth);
}
/* 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");
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
NS_WARNING_ASSERTION(aReflowInput.ComputedISize() != NS_UNCONSTRAINEDSIZE,
"Should have a precomputed inline-size!");
OverflowAreas 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, std::move(*prevOverflowFrames));
}
}
bool reflowInner;
bool reflowLegend;
nsIFrame* legend = GetLegend();
nsContainerFrame* inner = GetInner();
if (!legend || !inner) {
if (DrainSelfOverflowList()) {
legend = GetLegend();
inner = GetInner();
}
}
if (aReflowInput.ShouldReflowAllKids() || GetNextInFlow() ||
aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE) {
reflowInner = inner != nullptr;
reflowLegend = legend != nullptr;
} else {
reflowInner = inner && inner->IsSubtreeDirty();
reflowLegend = legend && legend->IsSubtreeDirty();
}
// @note |this| frame applies borders but not any padding. Our anonymous
// inner frame applies the padding (but not borders).
const auto wm = GetWritingMode();
auto skipSides = PreReflowBlockLevelLogicalSkipSides();
LogicalMargin border =
aReflowInput.ComputedLogicalBorder(wm).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);
ComputeSizeFlags sizeFlags;
if (legend->StylePosition()->ISize(wm).IsAuto()) {
sizeFlags = ComputeSizeFlag::ShrinkWrap;
}
ReflowInput::InitFlags initFlags; // intentionally empty
StyleSizeOverrides sizeOverrides; // intentionally empty
legendReflowInput.emplace(aPresContext, aReflowInput, legend,
legendAvailSize, Nothing(), initFlags,
sizeOverrides, sizeFlags);
}
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 (aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE &&
!(HasAnyStateBits(NS_FRAME_OUT_OF_FLOW) &&
aReflowInput.mStyleDisplay->IsAbsolutelyPositionedStyle()) &&
!prevInFlow && !aReflowInput.mFlags.mIsTopOfPage) {
// Propagate break-before from the legend to the fieldset.
if (legend->StyleDisplay()->BreakBefore() ||
aStatus.IsInlineBreakBefore()) {
aStatus.SetInlineLineBreakBeforeAndReset();
return;
}
// Honor break-inside:avoid by breaking before instead.
if (MOZ_UNLIKELY(avoidBreakInside) && !aStatus.IsFullyComplete()) {
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(wm).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(wm).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::InitFlag::CallerWillInit);
// Override computed padding, in case it's percentage padding
kidReflowInput.Init(
aPresContext, Nothing(), Nothing(),
Some(aReflowInput.ComputedLogicalPadding(inner->GetWritingMode())));
// Propagate the aspect-ratio flag to |inner| (i.e. the container frame
// wrapped by nsFieldSetFrame), so we can let |inner|'s reflow code handle
// automatic content-based minimum.
// Note: Init() resets this flag, so we have to copy it again here.
if (aReflowInput.mFlags.mIsBSizeSetByAspectRatio) {
kidReflowInput.mFlags.mIsBSizeSetByAspectRatio = true;
}
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.SetComputedMinBSize(
std::max(0, aReflowInput.ComputedMinBSize() - mLegendSpace));
}
if (aReflowInput.ComputedMaxBSize() != NS_UNCONSTRAINEDSIZE) {
kidReflowInput.SetComputedMaxBSize(
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()) {
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(wm));
// 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/LogicalAlign
auto* legendElement =
dom::HTMLLegendElement::FromNode(legend->GetContent());
switch (legendElement->LogicalAlign(wm)) {
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(wm);
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 (Maybe<nscoord> containBSize =
aReflowInput.mFrame->ContainIntrinsicBSize()) {
// If we're size-contained in block axis, then we must set finalSize
// according to contain-intrinsic-block-size, disregarding legend and inner.
// 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(*containBSize)
: aReflowInput.ComputedBSize();
finalSize.BSize(wm) =
contentBoxBSize +
aReflowInput.ComputedLogicalBorderPadding(wm).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)) {
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();
}
void nsFieldSetFrame::SetInitialChildList(ChildListID aListID,
nsFrameList&& aChildList) {
nsContainerFrame::SetInitialChildList(aListID, std::move(aChildList));
MOZ_ASSERT(
aListID != FrameChildListID::Principal || GetInner() || GetLegend(),
"Setting principal child list should populate our inner frame "
"or our rendered legend");
}
void nsFieldSetFrame::AppendFrames(ChildListID aListID,
nsFrameList&& aFrameList) {
MOZ_ASSERT(aListID == FrameChildListID::NoReflowPrincipal &&
HasAnyStateBits(NS_FRAME_FIRST_REFLOW),
"AppendFrames should only be used from "
"nsCSSFrameConstructor::ConstructFieldSetFrame");
nsContainerFrame::AppendFrames(aListID, std::move(aFrameList));
MOZ_ASSERT(GetInner(), "at this point we should have an inner frame");
}
void nsFieldSetFrame::InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList&& aFrameList) {
MOZ_ASSERT(
aListID == FrameChildListID::Principal && !aPrevFrame && !GetLegend(),
"InsertFrames should only be used to prepend a rendered legend "
"from nsCSSFrameConstructor::ConstructFramesFromItemList");
nsContainerFrame::InsertFrames(aListID, aPrevFrame, aPrevFrameLine,
std::move(aFrameList));
MOZ_ASSERT(GetLegend());
}
#ifdef DEBUG
void nsFieldSetFrame::RemoveFrame(DestroyContext&, ChildListID, nsIFrame*) {
MOZ_CRASH("nsFieldSetFrame::RemoveFrame not supported");
}
#endif
#ifdef ACCESSIBILITY
a11y::AccType nsFieldSetFrame::AccessibleType() {
return a11y::eHTMLGroupboxType;
}
#endif
BaselineSharingGroup nsFieldSetFrame::GetDefaultBaselineSharingGroup() const {
switch (StyleDisplay()->DisplayInside()) {
case mozilla::StyleDisplayInside::Grid:
case mozilla::StyleDisplayInside::Flex:
return BaselineSharingGroup::First;
default:
return BaselineSharingGroup::Last;
}
}
nscoord nsFieldSetFrame::SynthesizeFallbackBaseline(
WritingMode aWM, BaselineSharingGroup aBaselineGroup) const {
return Baseline::SynthesizeBOffsetFromMarginBox(this, aWM, aBaselineGroup);
}
Maybe<nscoord> nsFieldSetFrame::GetNaturalBaselineBOffset(
WritingMode aWM, BaselineSharingGroup aBaselineGroup,
BaselineExportContext aExportContext) const {
if (StyleDisplay()->IsContainLayout()) {
// If we are layout-contained, our child 'inner' should not
// affect how we calculate our baseline.
return Nothing{};
}
nsIFrame* inner = GetInner();
if (MOZ_UNLIKELY(!inner)) {
return Nothing{};
}
MOZ_ASSERT(!inner->GetWritingMode().IsOrthogonalTo(aWM));
const auto result =
inner->GetNaturalBaselineBOffset(aWM, aBaselineGroup, aExportContext);
if (!result) {
return Nothing{};
}
nscoord innerBStart = inner->BStart(aWM, GetSize());
if (aBaselineGroup == BaselineSharingGroup::First) {
return Some(*result + innerBStart);
}
return Some(*result + BSize(aWM) - (innerBStart + inner->BSize(aWM)));
}
ScrollContainerFrame* nsFieldSetFrame::GetScrollTargetFrame() const {
return do_QueryFrame(GetInner());
}
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.
DestroyContext context(PresShell());
nsContainerFrame::RemoveFrame(context,
FrameChildListID::NoReflowPrincipal, 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 = GetExcessOverflowContainers()) {
eoc->AppendFrames(nullptr, std::move(nifs));
} else {
SetExcessOverflowContainers(std::move(nifs));
}
} else {
if (nsFrameList* oc = GetOverflowFrames()) {
oc->AppendFrames(nullptr, std::move(nifs));
} else {
SetOverflowFrames(std::move(nifs));
}
}
}
}
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку