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Diffstat (limited to 'layout/tables/nsTableWrapperFrame.cpp')
| -rw-r--r-- | layout/tables/nsTableWrapperFrame.cpp | 857 |
1 files changed, 857 insertions, 0 deletions
diff --git a/layout/tables/nsTableWrapperFrame.cpp b/layout/tables/nsTableWrapperFrame.cpp new file mode 100644 index 0000000000..a3e957c4fd --- /dev/null +++ b/layout/tables/nsTableWrapperFrame.cpp @@ -0,0 +1,857 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 "nsTableWrapperFrame.h" + +#include "LayoutConstants.h" +#include "mozilla/ComputedStyle.h" +#include "mozilla/PresShell.h" +#include "nsFrameManager.h" +#include "nsGridContainerFrame.h" +#include "nsTableFrame.h" +#include "nsTableCellFrame.h" +#include "nsStyleConsts.h" +#include "nsPresContext.h" +#include "nsCSSRendering.h" +#include "nsIContent.h" +#include "prinrval.h" +#include "nsGkAtoms.h" +#include "nsHTMLParts.h" +#include "nsDisplayList.h" +#include "nsLayoutUtils.h" +#include "nsIFrameInlines.h" +#include <algorithm> + +using namespace mozilla; +using namespace mozilla::layout; + +nscoord nsTableWrapperFrame::SynthesizeFallbackBaseline( + mozilla::WritingMode aWM, BaselineSharingGroup aBaselineGroup) const { + const auto marginBlockEnd = GetLogicalUsedMargin(aWM).BEnd(aWM); + if (aWM.IsCentralBaseline()) { + return (BSize(aWM) + marginBlockEnd) / 2; + } + // Our fallback baseline is the block-end margin-edge, with respect to the + // given writing mode. + if (aBaselineGroup == BaselineSharingGroup::Last) { + return -marginBlockEnd; + } + return BSize(aWM) + marginBlockEnd; +} + +Maybe<nscoord> nsTableWrapperFrame::GetNaturalBaselineBOffset( + WritingMode aWM, BaselineSharingGroup aBaselineGroup, + BaselineExportContext aExportContext) const { + // Baseline is determined by row + // (https://drafts.csswg.org/css-align-3/#baseline-export). If the row + // direction is going to be orthogonal to the parent's writing mode, the + // resulting baseline wouldn't be valid, so we use the fallback baseline + // instead. + if (StyleDisplay()->IsContainLayout() || + GetWritingMode().IsOrthogonalTo(aWM)) { + return Nothing{}; + } + auto* innerTable = InnerTableFrame(); + return innerTable + ->GetNaturalBaselineBOffset(aWM, aBaselineGroup, aExportContext) + .map([this, aWM, aBaselineGroup, innerTable](nscoord aBaseline) { + auto bStart = innerTable->BStart(aWM, mRect.Size()); + if (aBaselineGroup == BaselineSharingGroup::First) { + return aBaseline + bStart; + } + auto bEnd = bStart + innerTable->BSize(aWM); + return BSize(aWM) - (bEnd - aBaseline); + }); +} + +nsTableWrapperFrame::nsTableWrapperFrame(ComputedStyle* aStyle, + nsPresContext* aPresContext, + ClassID aID) + : nsContainerFrame(aStyle, aPresContext, aID) {} + +nsTableWrapperFrame::~nsTableWrapperFrame() = default; + +NS_QUERYFRAME_HEAD(nsTableWrapperFrame) + NS_QUERYFRAME_ENTRY(nsTableWrapperFrame) +NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame) + +#ifdef ACCESSIBILITY +a11y::AccType nsTableWrapperFrame::AccessibleType() { + return a11y::eHTMLTableType; +} +#endif + +void nsTableWrapperFrame::Destroy(DestroyContext& aContext) { + DestroyAbsoluteFrames(aContext); + mCaptionFrames.DestroyFrames(aContext); + nsContainerFrame::Destroy(aContext); +} + +const nsFrameList& nsTableWrapperFrame::GetChildList( + ChildListID aListID) const { + if (aListID == FrameChildListID::Caption) { + return mCaptionFrames; + } + + return nsContainerFrame::GetChildList(aListID); +} + +void nsTableWrapperFrame::GetChildLists(nsTArray<ChildList>* aLists) const { + nsContainerFrame::GetChildLists(aLists); + mCaptionFrames.AppendIfNonempty(aLists, FrameChildListID::Caption); +} + +void nsTableWrapperFrame::SetInitialChildList(ChildListID aListID, + nsFrameList&& aChildList) { + if (FrameChildListID::Caption == aListID) { +#ifdef DEBUG + nsIFrame::VerifyDirtyBitSet(aChildList); + for (nsIFrame* f : aChildList) { + MOZ_ASSERT(f->GetParent() == this, "Unexpected parent"); + } +#endif + // the frame constructor already checked for table-caption display type + MOZ_ASSERT(mCaptionFrames.IsEmpty(), + "already have child frames in CaptionList"); + mCaptionFrames = std::move(aChildList); + } else { + MOZ_ASSERT(FrameChildListID::Principal != aListID || + (aChildList.FirstChild() && + aChildList.FirstChild() == aChildList.LastChild() && + aChildList.FirstChild()->IsTableFrame()), + "expected a single table frame in principal child list"); + nsContainerFrame::SetInitialChildList(aListID, std::move(aChildList)); + } +} + +void nsTableWrapperFrame::AppendFrames(ChildListID aListID, + nsFrameList&& aFrameList) { + // We only have two child frames: the inner table and a caption frame. + // The inner frame is provided when we're initialized, and it cannot change + MOZ_ASSERT(FrameChildListID::Caption == aListID, "unexpected child list"); + MOZ_ASSERT(aFrameList.IsEmpty() || aFrameList.FirstChild()->IsTableCaption(), + "appending non-caption frame to captionList"); + mCaptionFrames.AppendFrames(nullptr, std::move(aFrameList)); + + // Reflow the new caption frame. It's already marked dirty, so + // just tell the pres shell. + PresShell()->FrameNeedsReflow(this, IntrinsicDirty::FrameAndAncestors, + NS_FRAME_HAS_DIRTY_CHILDREN); + // The presence of caption frames makes us sort our display + // list differently, so mark us as changed for the new + // ordering. + MarkNeedsDisplayItemRebuild(); +} + +void nsTableWrapperFrame::InsertFrames( + ChildListID aListID, nsIFrame* aPrevFrame, + const nsLineList::iterator* aPrevFrameLine, nsFrameList&& aFrameList) { + MOZ_ASSERT(FrameChildListID::Caption == aListID, "unexpected child list"); + MOZ_ASSERT(aFrameList.IsEmpty() || aFrameList.FirstChild()->IsTableCaption(), + "inserting non-caption frame into captionList"); + MOZ_ASSERT(!aPrevFrame || aPrevFrame->GetParent() == this, + "inserting after sibling frame with different parent"); + mCaptionFrames.InsertFrames(nullptr, aPrevFrame, std::move(aFrameList)); + + // Reflow the new caption frame. It's already marked dirty, so + // just tell the pres shell. + PresShell()->FrameNeedsReflow(this, IntrinsicDirty::FrameAndAncestors, + NS_FRAME_HAS_DIRTY_CHILDREN); + MarkNeedsDisplayItemRebuild(); +} + +void nsTableWrapperFrame::RemoveFrame(DestroyContext& aContext, + ChildListID aListID, + nsIFrame* aOldFrame) { + // We only have two child frames: the inner table and one caption frame. + // The inner frame can't be removed so this should be the caption + MOZ_ASSERT(FrameChildListID::Caption == aListID, "can't remove inner frame"); + + // Remove the frame and destroy it + mCaptionFrames.DestroyFrame(aContext, aOldFrame); + + PresShell()->FrameNeedsReflow(this, IntrinsicDirty::FrameAndAncestors, + NS_FRAME_HAS_DIRTY_CHILDREN); + MarkNeedsDisplayItemRebuild(); +} + +void nsTableWrapperFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, + const nsDisplayListSet& aLists) { + // No border or background is painted because they belong to the inner table. + // The outline belongs to the wrapper frame so it can contain the caption. + + // If there's no caption, take a short cut to avoid having to create + // the special display list set and then sort it. + if (mCaptionFrames.IsEmpty()) { + BuildDisplayListForInnerTable(aBuilder, aLists); + DisplayOutline(aBuilder, aLists); + return; + } + + nsDisplayListCollection set(aBuilder); + BuildDisplayListForInnerTable(aBuilder, set); + + nsDisplayListSet captionSet(set, set.BlockBorderBackgrounds()); + BuildDisplayListForChild(aBuilder, mCaptionFrames.FirstChild(), captionSet); + + // Now we have to sort everything by content order, since the caption + // may be somewhere inside the table. + // We don't sort BlockBorderBackgrounds and BorderBackgrounds because the + // display items in those lists should stay out of content order in order to + // follow the rules in https://www.w3.org/TR/CSS21/zindex.html#painting-order + // and paint the caption background after all of the rest. + set.Floats()->SortByContentOrder(GetContent()); + set.Content()->SortByContentOrder(GetContent()); + set.PositionedDescendants()->SortByContentOrder(GetContent()); + set.Outlines()->SortByContentOrder(GetContent()); + set.MoveTo(aLists); + + DisplayOutline(aBuilder, aLists); +} + +void nsTableWrapperFrame::BuildDisplayListForInnerTable( + nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) { + // Just paint the regular children, but the children's background is our + // true background (there should only be one, the real table) + nsIFrame* kid = mFrames.FirstChild(); + // The children should be in content order + while (kid) { + BuildDisplayListForChild(aBuilder, kid, aLists); + kid = kid->GetNextSibling(); + } +} + +ComputedStyle* nsTableWrapperFrame::GetParentComputedStyle( + nsIFrame** aProviderFrame) const { + // The table wrapper frame and the (inner) table frame split the style + // data by giving the table frame the ComputedStyle associated with + // the table content node and creating a ComputedStyle for the wrapper + // frame that is a *child* of the table frame's ComputedStyle, + // matching the ::-moz-table-wrapper pseudo-element. html.css has a + // rule that causes that pseudo-element (and thus the wrapper table) + // to inherit *some* style properties from the table frame. The + // children of the table inherit directly from the inner table, and + // the table wrapper's ComputedStyle is a leaf. + + return (*aProviderFrame = InnerTableFrame())->Style(); +} + +/* virtual */ +nscoord nsTableWrapperFrame::GetMinISize(gfxContext* aRenderingContext) { + nscoord iSize = nsLayoutUtils::IntrinsicForContainer( + aRenderingContext, InnerTableFrame(), IntrinsicISizeType::MinISize); + DISPLAY_MIN_INLINE_SIZE(this, iSize); + if (mCaptionFrames.NotEmpty()) { + nscoord capISize = nsLayoutUtils::IntrinsicForContainer( + aRenderingContext, mCaptionFrames.FirstChild(), + IntrinsicISizeType::MinISize); + if (capISize > iSize) { + iSize = capISize; + } + } + return iSize; +} + +/* virtual */ +nscoord nsTableWrapperFrame::GetPrefISize(gfxContext* aRenderingContext) { + nscoord maxISize; + DISPLAY_PREF_INLINE_SIZE(this, maxISize); + + maxISize = nsLayoutUtils::IntrinsicForContainer( + aRenderingContext, InnerTableFrame(), IntrinsicISizeType::PrefISize); + if (mCaptionFrames.NotEmpty()) { + // Don't let the caption's pref isize expand the table's pref isize. + const nscoord capMinISize = nsLayoutUtils::IntrinsicForContainer( + aRenderingContext, mCaptionFrames.FirstChild(), + IntrinsicISizeType::MinISize); + maxISize = std::max(maxISize, capMinISize); + } + return maxISize; +} + +LogicalSize nsTableWrapperFrame::InnerTableShrinkWrapSize( + gfxContext* aRenderingContext, nsTableFrame* aTableFrame, WritingMode aWM, + const LogicalSize& aCBSize, nscoord aAvailableISize, + const StyleSizeOverrides& aSizeOverrides, ComputeSizeFlags aFlags) const { + MOZ_ASSERT(InnerTableFrame() == aTableFrame); + + AutoMaybeDisableFontInflation an(aTableFrame); + + Maybe<LogicalMargin> collapseBorder; + Maybe<LogicalMargin> collapsePadding; + aTableFrame->GetCollapsedBorderPadding(collapseBorder, collapsePadding); + + SizeComputationInput input(aTableFrame, aRenderingContext, aWM, + aCBSize.ISize(aWM), collapseBorder, + collapsePadding); + LogicalSize marginSize(aWM); // Inner table doesn't have any margin + LogicalSize bpSize = input.ComputedLogicalBorderPadding(aWM).Size(aWM); + + // Note that we pass an empty caption-area here (rather than the caption's + // actual size). This is fine because: + // + // 1) nsTableWrapperFrame::ComputeSize() only uses the size returned by this + // method (indirectly via calling nsTableWrapperFrame::ComputeAutoSize()) + // if it get a aSizeOverrides arg containing any size overrides with + // mApplyOverridesVerbatim=true. The aSizeOverrides arg is passed to this + // method without any modifications. + // + // 2) With 1), that means the aSizeOverrides passing into this method should + // be applied to the inner table directly, so we don't need to subtract + // caption-area when preparing innerOverrides for + // nsTableFrame::ComputeSize(). + StyleSizeOverrides innerOverrides = ComputeSizeOverridesForInnerTable( + aTableFrame, aSizeOverrides, bpSize, /* aBSizeOccupiedByCaption = */ 0); + auto size = + aTableFrame + ->ComputeSize(aRenderingContext, aWM, aCBSize, aAvailableISize, + marginSize, bpSize, innerOverrides, aFlags) + .mLogicalSize; + size.ISize(aWM) += bpSize.ISize(aWM); + if (size.BSize(aWM) != NS_UNCONSTRAINEDSIZE) { + size.BSize(aWM) += bpSize.BSize(aWM); + } + return size; +} + +LogicalSize nsTableWrapperFrame::CaptionShrinkWrapSize( + gfxContext* aRenderingContext, nsIFrame* aCaptionFrame, WritingMode aWM, + const LogicalSize& aCBSize, nscoord aAvailableISize, + ComputeSizeFlags aFlags) const { + MOZ_ASSERT(aCaptionFrame == mCaptionFrames.FirstChild()); + + AutoMaybeDisableFontInflation an(aCaptionFrame); + + SizeComputationInput input(aCaptionFrame, aRenderingContext, aWM, + aCBSize.ISize(aWM)); + LogicalSize marginSize = input.ComputedLogicalMargin(aWM).Size(aWM); + LogicalSize bpSize = input.ComputedLogicalBorderPadding(aWM).Size(aWM); + + auto size = aCaptionFrame + ->ComputeSize(aRenderingContext, aWM, aCBSize, + aAvailableISize, marginSize, bpSize, {}, aFlags) + .mLogicalSize; + size.ISize(aWM) += (marginSize.ISize(aWM) + bpSize.ISize(aWM)); + if (size.BSize(aWM) != NS_UNCONSTRAINEDSIZE) { + size.BSize(aWM) += (marginSize.BSize(aWM) + bpSize.BSize(aWM)); + } + return size; +} + +StyleSize nsTableWrapperFrame::ReduceStyleSizeBy( + const StyleSize& aStyleSize, const nscoord aAmountToReduce) const { + MOZ_ASSERT(aStyleSize.ConvertsToLength(), "Only handles 'Length' StyleSize!"); + const nscoord size = std::max(0, aStyleSize.ToLength() - aAmountToReduce); + return StyleSize::LengthPercentage(LengthPercentage::FromAppUnits(size)); +} + +StyleSizeOverrides nsTableWrapperFrame::ComputeSizeOverridesForInnerTable( + const nsTableFrame* aTableFrame, + const StyleSizeOverrides& aWrapperSizeOverrides, + const LogicalSize& aBorderPadding, nscoord aBSizeOccupiedByCaption) const { + if (aWrapperSizeOverrides.mApplyOverridesVerbatim || + !aWrapperSizeOverrides.HasAnyLengthOverrides()) { + // We are asked to apply the size overrides directly to the inner table, or + // there's no 'Length' size overrides. No need to tweak the size overrides. + return aWrapperSizeOverrides; + } + + const auto wm = aTableFrame->GetWritingMode(); + LogicalSize areaOccupied(wm, 0, aBSizeOccupiedByCaption); + if (aTableFrame->StylePosition()->mBoxSizing == StyleBoxSizing::Content) { + // If the inner table frame has 'box-sizing: content', enlarge the occupied + // area by adding border & padding because they should also be subtracted + // from the size overrides. + areaOccupied += aBorderPadding; + } + + StyleSizeOverrides innerSizeOverrides; + const auto& wrapperISize = aWrapperSizeOverrides.mStyleISize; + if (wrapperISize) { + MOZ_ASSERT(!wrapperISize->HasPercent(), + "Table doesn't support size overrides containing percentages!"); + innerSizeOverrides.mStyleISize.emplace( + wrapperISize->ConvertsToLength() + ? ReduceStyleSizeBy(*wrapperISize, areaOccupied.ISize(wm)) + : *wrapperISize); + } + + const auto& wrapperBSize = aWrapperSizeOverrides.mStyleBSize; + if (wrapperBSize) { + MOZ_ASSERT(!wrapperBSize->HasPercent(), + "Table doesn't support size overrides containing percentages!"); + innerSizeOverrides.mStyleBSize.emplace( + wrapperBSize->ConvertsToLength() + ? ReduceStyleSizeBy(*wrapperBSize, areaOccupied.BSize(wm)) + : *wrapperBSize); + } + + return innerSizeOverrides; +} + +/* virtual */ +nsIFrame::SizeComputationResult nsTableWrapperFrame::ComputeSize( + gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize, + nscoord aAvailableISize, const LogicalSize& aMargin, + const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides, + ComputeSizeFlags aFlags) { + auto result = nsContainerFrame::ComputeSize( + aRenderingContext, aWM, aCBSize, aAvailableISize, aMargin, aBorderPadding, + aSizeOverrides, aFlags); + + if (aSizeOverrides.mApplyOverridesVerbatim && + aSizeOverrides.HasAnyOverrides()) { + // We are asked to apply the size overrides directly to the inner table, but + // we still want ourselves to remain 'auto'-sized and shrink-wrapping our + // children's sizes. (Table wrapper frames always have 'auto' inline-size + // and block-size, since we don't inherit those properties from inner table, + // and authors can't target them with styling.) + auto size = + ComputeAutoSize(aRenderingContext, aWM, aCBSize, aAvailableISize, + aMargin, aBorderPadding, aSizeOverrides, aFlags); + result.mLogicalSize = size; + } + + return result; +} + +/* virtual */ +LogicalSize nsTableWrapperFrame::ComputeAutoSize( + gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize, + nscoord aAvailableISize, const LogicalSize& aMargin, + const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides, + ComputeSizeFlags aFlags) { + nscoord kidAvailableISize = aAvailableISize - aMargin.ISize(aWM); + NS_ASSERTION(aBorderPadding.IsAllZero(), + "Table wrapper frames cannot have borders or paddings"); + + // When we're shrink-wrapping, our auto size needs to wrap around the + // actual size of the table, which (if it is specified as a percent) + // could be something that is not reflected in our GetMinISize and + // GetPrefISize. See bug 349457 for an example. + const ComputeSizeFlags flags = CreateComputeSizeFlagsForChild(); + + // Match the logic in Reflow() that sets aside space for the caption. + Maybe<StyleCaptionSide> captionSide = GetCaptionSide(); + + const LogicalSize innerTableSize = InnerTableShrinkWrapSize( + aRenderingContext, InnerTableFrame(), aWM, aCBSize, kidAvailableISize, + aSizeOverrides, flags); + if (!captionSide) { + return innerTableSize; + } + const LogicalSize captionSize = + CaptionShrinkWrapSize(aRenderingContext, mCaptionFrames.FirstChild(), aWM, + aCBSize, innerTableSize.ISize(aWM), flags); + const nscoord iSize = + std::max(innerTableSize.ISize(aWM), captionSize.ISize(aWM)); + nscoord bSize = NS_UNCONSTRAINEDSIZE; + if (innerTableSize.BSize(aWM) != NS_UNCONSTRAINEDSIZE && + captionSize.BSize(aWM) != NS_UNCONSTRAINEDSIZE) { + bSize = innerTableSize.BSize(aWM) + captionSize.BSize(aWM); + } + return LogicalSize(aWM, iSize, bSize); +} + +Maybe<StyleCaptionSide> nsTableWrapperFrame::GetCaptionSide() const { + if (mCaptionFrames.IsEmpty()) { + return Nothing(); + } + return Some(mCaptionFrames.FirstChild()->StyleTableBorder()->mCaptionSide); +} + +StyleVerticalAlignKeyword nsTableWrapperFrame::GetCaptionVerticalAlign() const { + const auto& va = mCaptionFrames.FirstChild()->StyleDisplay()->mVerticalAlign; + return va.IsKeyword() ? va.AsKeyword() : StyleVerticalAlignKeyword::Top; +} + +nscoord nsTableWrapperFrame::ComputeFinalBSize( + const LogicalSize& aInnerSize, const LogicalSize& aCaptionSize, + const LogicalMargin& aCaptionMargin, const WritingMode aWM) const { + // negative sizes can upset overflow-area code + return std::max(0, aInnerSize.BSize(aWM) + + std::max(0, aCaptionSize.BSize(aWM) + + aCaptionMargin.BStartEnd(aWM))); +} + +void nsTableWrapperFrame::GetCaptionOrigin(StyleCaptionSide aCaptionSide, + const LogicalSize& aInnerSize, + const LogicalSize& aCaptionSize, + LogicalMargin& aCaptionMargin, + LogicalPoint& aOrigin, + WritingMode aWM) const { + aOrigin.I(aWM) = aOrigin.B(aWM) = 0; + if ((NS_UNCONSTRAINEDSIZE == aInnerSize.ISize(aWM)) || + (NS_UNCONSTRAINEDSIZE == aInnerSize.BSize(aWM)) || + (NS_UNCONSTRAINEDSIZE == aCaptionSize.ISize(aWM)) || + (NS_UNCONSTRAINEDSIZE == aCaptionSize.BSize(aWM))) { + return; + } + if (mCaptionFrames.IsEmpty()) { + return; + } + + NS_ASSERTION(NS_AUTOMARGIN != aCaptionMargin.IStart(aWM) && + NS_AUTOMARGIN != aCaptionMargin.BStart(aWM) && + NS_AUTOMARGIN != aCaptionMargin.BEnd(aWM), + "The computed caption margin is auto?"); + + aOrigin.I(aWM) = aCaptionMargin.IStart(aWM); + + // block-dir computation + switch (aCaptionSide) { + case StyleCaptionSide::Bottom: + aOrigin.B(aWM) = aInnerSize.BSize(aWM) + aCaptionMargin.BStart(aWM); + break; + case StyleCaptionSide::Top: + aOrigin.B(aWM) = aCaptionMargin.BStart(aWM); + break; + } +} + +void nsTableWrapperFrame::GetInnerOrigin(const MaybeCaptionSide& aCaptionSide, + const LogicalSize& aCaptionSize, + const LogicalMargin& aCaptionMargin, + const LogicalSize& aInnerSize, + LogicalPoint& aOrigin, + WritingMode aWM) const { + NS_ASSERTION(NS_AUTOMARGIN != aCaptionMargin.IStart(aWM) && + NS_AUTOMARGIN != aCaptionMargin.IEnd(aWM), + "The computed caption margin is auto?"); + + aOrigin.I(aWM) = aOrigin.B(aWM) = 0; + if ((NS_UNCONSTRAINEDSIZE == aInnerSize.ISize(aWM)) || + (NS_UNCONSTRAINEDSIZE == aInnerSize.BSize(aWM)) || + (NS_UNCONSTRAINEDSIZE == aCaptionSize.ISize(aWM)) || + (NS_UNCONSTRAINEDSIZE == aCaptionSize.BSize(aWM))) { + return; + } + + // block-dir computation + if (aCaptionSide) { + switch (*aCaptionSide) { + case StyleCaptionSide::Bottom: + // Leave at zero. + break; + case StyleCaptionSide::Top: + aOrigin.B(aWM) = + aCaptionSize.BSize(aWM) + aCaptionMargin.BStartEnd(aWM); + break; + } + } +} + +ComputeSizeFlags nsTableWrapperFrame::CreateComputeSizeFlagsForChild() const { + // Shrink-wrap child frames by default, except if we're a stretched grid item. + if (MOZ_UNLIKELY(IsGridItem())) { + auto* gridContainer = static_cast<nsGridContainerFrame*>(GetParent()); + if (gridContainer->GridItemShouldStretch(this, eLogicalAxisInline)) { + return {}; + } + } + return {ComputeSizeFlag::ShrinkWrap}; +} + +void nsTableWrapperFrame::CreateReflowInputForInnerTable( + nsPresContext* aPresContext, nsTableFrame* aTableFrame, + const ReflowInput& aOuterRI, Maybe<ReflowInput>& aChildRI, + const nscoord aAvailISize, nscoord aBSizeOccupiedByCaption) const { + MOZ_ASSERT(InnerTableFrame() == aTableFrame); + + const WritingMode wm = aTableFrame->GetWritingMode(); + // If we have a caption occupied our content-box area, reduce the available + // block-size by the amount. + nscoord availBSize = aOuterRI.AvailableBSize(); + if (availBSize != NS_UNCONSTRAINEDSIZE) { + availBSize = std::max(0, availBSize - aBSizeOccupiedByCaption); + } + const LogicalSize availSize(wm, aAvailISize, availBSize); + + // For inner table frames, the containing block is the same as for the outer + // table frame. + Maybe<LogicalSize> cbSize = Some(aOuterRI.mContainingBlockSize); + + // However, if we are a grid item, the CB size needs to subtract our margins + // and the area occupied by the caption. + // + // Note that inner table computed margins are always zero, they're inherited + // by the table wrapper, so we need to get our margin from aOuterRI. + if (IsGridItem()) { + const LogicalMargin margin = aOuterRI.ComputedLogicalMargin(wm); + cbSize->ISize(wm) = std::max(0, cbSize->ISize(wm) - margin.IStartEnd(wm)); + if (cbSize->BSize(wm) != NS_UNCONSTRAINEDSIZE) { + cbSize->BSize(wm) = std::max(0, cbSize->BSize(wm) - margin.BStartEnd(wm) - + aBSizeOccupiedByCaption); + } + } + + ComputeSizeFlags csFlags = CreateComputeSizeFlagsForChild(); + if (!aTableFrame->IsBorderCollapse() && + !aOuterRI.mStyleSizeOverrides.HasAnyOverrides()) { + // We are not border-collapsed and not given any size overrides. It's + // sufficient to call the standard ReflowInput constructor. + aChildRI.emplace(aPresContext, aOuterRI, aTableFrame, availSize, cbSize, + ReflowInput::InitFlags{}, StyleSizeOverrides{}, csFlags); + return; + } + + Maybe<LogicalMargin> borderPadding; + Maybe<LogicalMargin> padding; + { + // Compute inner table frame's border & padding because we may need to + // reduce the size for inner table's size overrides. We won't waste time if + // they are not used, because we can use them directly by passing them into + // ReflowInput::Init(). + Maybe<LogicalMargin> collapseBorder; + Maybe<LogicalMargin> collapsePadding; + aTableFrame->GetCollapsedBorderPadding(collapseBorder, collapsePadding); + SizeComputationInput input(aTableFrame, aOuterRI.mRenderingContext, wm, + cbSize->ISize(wm), collapseBorder, + collapsePadding); + borderPadding.emplace(input.ComputedLogicalBorderPadding(wm)); + padding.emplace(input.ComputedLogicalPadding(wm)); + } + + StyleSizeOverrides innerOverrides = ComputeSizeOverridesForInnerTable( + aTableFrame, aOuterRI.mStyleSizeOverrides, borderPadding->Size(wm), + aBSizeOccupiedByCaption); + + aChildRI.emplace(aPresContext, aOuterRI, aTableFrame, availSize, Nothing(), + ReflowInput::InitFlag::CallerWillInit, innerOverrides, + csFlags); + aChildRI->Init(aPresContext, cbSize, Some(*borderPadding - *padding), + padding); +} + +void nsTableWrapperFrame::CreateReflowInputForCaption( + nsPresContext* aPresContext, nsIFrame* aCaptionFrame, + const ReflowInput& aOuterRI, Maybe<ReflowInput>& aChildRI, + const nscoord aAvailISize) const { + MOZ_ASSERT(aCaptionFrame == mCaptionFrames.FirstChild()); + + const WritingMode wm = aCaptionFrame->GetWritingMode(); + + // Use unconstrained available block-size so that the caption is always + // fully-complete. + const LogicalSize availSize(wm, aAvailISize, NS_UNCONSTRAINEDSIZE); + aChildRI.emplace(aPresContext, aOuterRI, aCaptionFrame, availSize); + + // See if we need to reset mIsTopOfPage flag. + if (aChildRI->mFlags.mIsTopOfPage) { + if (auto captionSide = GetCaptionSide()) { + if (*captionSide == StyleCaptionSide::Bottom) { + aChildRI->mFlags.mIsTopOfPage = false; + } + } + } +} + +void nsTableWrapperFrame::ReflowChild(nsPresContext* aPresContext, + nsIFrame* aChildFrame, + const ReflowInput& aChildRI, + ReflowOutput& aMetrics, + nsReflowStatus& aStatus) { + // Using zero as containerSize here because we want consistency between + // the GetLogicalPosition and ReflowChild calls, to avoid unnecessarily + // changing the frame's coordinates; but we don't yet know its final + // position anyway so the actual value is unimportant. + const nsSize zeroCSize; + WritingMode wm = aChildRI.GetWritingMode(); + + // Use the current position as a best guess for placement. + LogicalPoint childPt = aChildFrame->GetLogicalPosition(wm, zeroCSize); + ReflowChildFlags flags = ReflowChildFlags::NoMoveFrame; + + // We don't want to delete our next-in-flow's child if it's an inner table + // frame, because table wrapper frames always assume that their inner table + // frames don't go away. If a table wrapper frame is removed because it is + // a next-in-flow of an already complete table wrapper frame, then it will + // take care of removing it's inner table frame. + if (aChildFrame == InnerTableFrame()) { + flags |= ReflowChildFlags::NoDeleteNextInFlowChild; + } + + nsContainerFrame::ReflowChild(aChildFrame, aPresContext, aMetrics, aChildRI, + wm, childPt, zeroCSize, flags, aStatus); +} + +void nsTableWrapperFrame::UpdateOverflowAreas(ReflowOutput& aMet) { + aMet.SetOverflowAreasToDesiredBounds(); + ConsiderChildOverflow(aMet.mOverflowAreas, InnerTableFrame()); + if (mCaptionFrames.NotEmpty()) { + ConsiderChildOverflow(aMet.mOverflowAreas, mCaptionFrames.FirstChild()); + } +} + +void nsTableWrapperFrame::Reflow(nsPresContext* aPresContext, + ReflowOutput& aDesiredSize, + const ReflowInput& aOuterRI, + nsReflowStatus& aStatus) { + MarkInReflow(); + DO_GLOBAL_REFLOW_COUNT("nsTableWrapperFrame"); + DISPLAY_REFLOW(aPresContext, this, aOuterRI, aDesiredSize, aStatus); + MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!"); + + // Initialize out parameters + aDesiredSize.ClearSize(); + + if (!HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) { + // Set up our kids. They're already present, on an overflow list, + // or there are none so we'll create them now + MoveOverflowToChildList(); + } + + Maybe<ReflowInput> captionRI; + Maybe<ReflowInput> innerRI; + + nsRect origCaptionRect; + nsRect origCaptionInkOverflow; + bool captionFirstReflow = false; + if (mCaptionFrames.NotEmpty()) { + origCaptionRect = mCaptionFrames.FirstChild()->GetRect(); + origCaptionInkOverflow = mCaptionFrames.FirstChild()->InkOverflowRect(); + captionFirstReflow = + mCaptionFrames.FirstChild()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW); + } + + // ComputeAutoSize has to match this logic. + WritingMode wm = aOuterRI.GetWritingMode(); + Maybe<StyleCaptionSide> captionSide = GetCaptionSide(); + const nscoord contentBoxISize = aOuterRI.ComputedSize(wm).ISize(wm); + + MOZ_ASSERT(mCaptionFrames.NotEmpty() == captionSide.isSome()); + + // Compute the table's size first, and then prevent the caption from + // being larger in the inline dir unless it has to be. + // + // Note that CSS 2.1 (but not 2.0) says: + // The width of the anonymous box is the border-edge width of the + // table box inside it + // We don't actually make our anonymous box that isize (if we did, + // it would break 'auto' margins), but this effectively does that. + CreateReflowInputForInnerTable(aPresContext, InnerTableFrame(), aOuterRI, + innerRI, contentBoxISize); + + // First reflow the caption. + ReflowOutput captionMet(wm); + LogicalSize captionSize(wm); + LogicalMargin captionMargin(wm); + if (captionSide) { + // It's good that CSS 2.1 says not to include margins, since we can't, since + // they already been converted so they exactly fill the available isize + // (ignoring the margin on one side if neither are auto). (We take + // advantage of that later when we call GetCaptionOrigin, though.) + nscoord innerBorderISize = + innerRI->ComputedSizeWithBorderPadding(wm).ISize(wm); + CreateReflowInputForCaption(aPresContext, mCaptionFrames.FirstChild(), + aOuterRI, captionRI, innerBorderISize); + + // We intentionally don't merge capStatus into aStatus, since we currently + // can't handle caption continuations, but we probably should. + nsReflowStatus capStatus; + ReflowChild(aPresContext, mCaptionFrames.FirstChild(), *captionRI, + captionMet, capStatus); + captionSize = captionMet.Size(wm); + captionMargin = captionRI->ComputedLogicalMargin(wm); + nscoord bSizeOccupiedByCaption = + captionSize.BSize(wm) + captionMargin.BStartEnd(wm); + if (bSizeOccupiedByCaption) { + // Reset the inner table's ReflowInput to reduce various sizes because of + // the area occupied by caption. + innerRI.reset(); + CreateReflowInputForInnerTable(aPresContext, InnerTableFrame(), aOuterRI, + innerRI, contentBoxISize, + bSizeOccupiedByCaption); + } + } + + // Now we know how much to reduce the block-size for the inner table to + // account for captions. Reflow the inner table. + ReflowOutput innerMet(innerRI->GetWritingMode()); + ReflowChild(aPresContext, InnerTableFrame(), *innerRI, innerMet, aStatus); + LogicalSize innerSize(wm, innerMet.ISize(wm), innerMet.BSize(wm)); + + // Now that we've reflowed both we can place them. + // Compute the desiredSize so that we can use it as the containerSize + // for the FinishReflowChild calls below. + LogicalSize desiredSize(wm); + + // We have zero border and padding, so content-box inline-size is our desired + // border-box inline-size. + desiredSize.ISize(wm) = contentBoxISize; + desiredSize.BSize(wm) = + ComputeFinalBSize(innerSize, captionSize, captionMargin, wm); + + aDesiredSize.SetSize(wm, desiredSize); + nsSize containerSize = aDesiredSize.PhysicalSize(); + + MOZ_ASSERT(mCaptionFrames.NotEmpty() == captionSide.isSome()); + if (mCaptionFrames.NotEmpty()) { + LogicalPoint captionOrigin(wm); + GetCaptionOrigin(*captionSide, innerSize, captionSize, captionMargin, + captionOrigin, wm); + FinishReflowChild(mCaptionFrames.FirstChild(), aPresContext, captionMet, + captionRI.ptr(), wm, captionOrigin, containerSize, + ReflowChildFlags::ApplyRelativePositioning); + captionRI.reset(); + } + // XXX If the bsize is constrained then we need to check whether + // everything still fits... + + LogicalPoint innerOrigin(wm); + GetInnerOrigin(captionSide, captionSize, captionMargin, innerSize, + innerOrigin, wm); + // NOTE: Relative positioning on the table applies to the whole table wrapper. + FinishReflowChild(InnerTableFrame(), aPresContext, innerMet, innerRI.ptr(), + wm, innerOrigin, containerSize, ReflowChildFlags::Default); + innerRI.reset(); + + if (mCaptionFrames.NotEmpty()) { + nsTableFrame::InvalidateTableFrame(mCaptionFrames.FirstChild(), + origCaptionRect, origCaptionInkOverflow, + captionFirstReflow); + } + + UpdateOverflowAreas(aDesiredSize); + + if (GetPrevInFlow()) { + ReflowOverflowContainerChildren(aPresContext, aOuterRI, + aDesiredSize.mOverflowAreas, + ReflowChildFlags::Default, aStatus); + } + + FinishReflowWithAbsoluteFrames(aPresContext, aDesiredSize, aOuterRI, aStatus); +} + +/* ----- global methods ----- */ + +nsIContent* nsTableWrapperFrame::GetCellAt(uint32_t aRowIdx, + uint32_t aColIdx) const { + nsTableCellMap* cellMap = InnerTableFrame()->GetCellMap(); + if (!cellMap) { + return nullptr; + } + + nsTableCellFrame* cell = cellMap->GetCellInfoAt(aRowIdx, aColIdx); + if (!cell) { + return nullptr; + } + + return cell->GetContent(); +} + +nsTableWrapperFrame* NS_NewTableWrapperFrame(PresShell* aPresShell, + ComputedStyle* aStyle) { + return new (aPresShell) + nsTableWrapperFrame(aStyle, aPresShell->GetPresContext()); +} + +NS_IMPL_FRAMEARENA_HELPERS(nsTableWrapperFrame) + +#ifdef DEBUG_FRAME_DUMP +nsresult nsTableWrapperFrame::GetFrameName(nsAString& aResult) const { + return MakeFrameName(u"TableWrapper"_ns, aResult); +} +#endif |