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fune/layout/tables/nsTableCellFrame.cpp
Emilio Cobos Álvarez e18c9b7ad6 Bug 1815552 - Make positioned table parts deal correctly with switching position without being reframed. r=TYLin,layout-reviewers 
While looking at the backout, I noticed table parts relied on reframing
on abspos-container-ness changes in a subtle way, see the test, which
fails with the first patch of this bug applied without these changes.

Make the NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN mean the same for table parts
as for everything else. Instead, keep the registration status on each
relevant frame class individually.

Depends on D169127

Differential Revision: https://phabricator.services.mozilla.com/D170969
2023-03-01 19:04:17 +00:00

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/* -*- 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 "nsTableCellFrame.h"
#include "gfxContext.h"
#include "gfxUtils.h"
#include "mozilla/ComputedStyle.h"
#include "mozilla/PresShell.h"
#include "mozilla/StaticPrefs_layout.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Helpers.h"
#include "nsTableFrame.h"
#include "nsTableColFrame.h"
#include "nsTableRowFrame.h"
#include "nsTableRowGroupFrame.h"
#include "nsStyleConsts.h"
#include "nsPresContext.h"
#include "nsCSSRendering.h"
#include "nsIContent.h"
#include "nsIFrame.h"
#include "nsIFrameInlines.h"
#include "nsGenericHTMLElement.h"
#include "nsAttrValueInlines.h"
#include "nsHTMLParts.h"
#include "nsGkAtoms.h"
#include "nsDisplayList.h"
#include "nsLayoutUtils.h"
#include "nsTextFrame.h"
#include <algorithm>
// TABLECELL SELECTION
#include "nsFrameSelection.h"
#include "mozilla/LookAndFeel.h"
#ifdef ACCESSIBILITY
# include "nsAccessibilityService.h"
#endif
using namespace mozilla;
using namespace mozilla::gfx;
using namespace mozilla::image;
nsTableCellFrame::nsTableCellFrame(ComputedStyle* aStyle,
nsTableFrame* aTableFrame, ClassID aID)
: nsContainerFrame(aStyle, aTableFrame->PresContext(), aID),
mDesiredSize(aTableFrame->GetWritingMode()) {
mColIndex = 0;
mPriorAvailISize = 0;
SetContentEmpty(false);
}
nsTableCellFrame::~nsTableCellFrame() = default;
NS_IMPL_FRAMEARENA_HELPERS(nsTableCellFrame)
void nsTableCellFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
// Let the base class do its initialization
nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
if (HasAnyStateBits(NS_FRAME_FONT_INFLATION_CONTAINER)) {
AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
}
if (aPrevInFlow) {
// Set the column index
nsTableCellFrame* cellFrame = (nsTableCellFrame*)aPrevInFlow;
uint32_t colIndex = cellFrame->ColIndex();
SetColIndex(colIndex);
} else {
// Although the spec doesn't say that writing-mode is not applied to
// table-cells, we still override style value here because we want to
// make effective writing mode of table structure frames consistent
// within a table. The content inside table cells is reflowed by an
// anonymous block, hence their writing mode is not affected.
mWritingMode = GetTableFrame()->GetWritingMode();
}
}
void nsTableCellFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
nsTableFrame::MaybeUnregisterPositionedTablePart(this, aDestructRoot);
nsContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
// nsIPercentBSizeObserver methods
void nsTableCellFrame::NotifyPercentBSize(const ReflowInput& aReflowInput) {
// ReflowInput ensures the mCBReflowInput of blocks inside a
// cell is the cell frame, not the inner-cell block, and that the
// containing block of an inner table is the containing block of its
// table wrapper.
// XXXldb Given the now-stricter |NeedsToObserve|, many if not all of
// these tests are probably unnecessary.
// Maybe the cell reflow input; we sure if we're inside the |if|.
const ReflowInput* cellRI = aReflowInput.mCBReflowInput;
if (cellRI && cellRI->mFrame == this &&
(cellRI->ComputedBSize() == NS_UNCONSTRAINEDSIZE ||
cellRI->ComputedBSize() == 0)) { // XXXldb Why 0?
// This is a percentage bsize on a frame whose percentage bsizes
// are based on the bsize of the cell, since its containing block
// is the inner cell frame.
// We'll only honor the percent bsize if sibling-cells/ancestors
// have specified/pct bsize. (Also, siblings only count for this if
// both this cell and the sibling cell span exactly 1 row.)
if (nsTableFrame::AncestorsHaveStyleBSize(*cellRI) ||
(GetTableFrame()->GetEffectiveRowSpan(*this) == 1 &&
cellRI->mParentReflowInput->mFrame->HasAnyStateBits(
NS_ROW_HAS_CELL_WITH_STYLE_BSIZE))) {
for (const ReflowInput* rs = aReflowInput.mParentReflowInput;
rs != cellRI; rs = rs->mParentReflowInput) {
rs->mFrame->AddStateBits(NS_FRAME_CONTAINS_RELATIVE_BSIZE);
}
nsTableFrame::RequestSpecialBSizeReflow(*cellRI);
}
}
}
// The cell needs to observe its block and things inside its block but nothing
// below that
bool nsTableCellFrame::NeedsToObserve(const ReflowInput& aReflowInput) {
const ReflowInput* rs = aReflowInput.mParentReflowInput;
if (!rs) return false;
if (rs->mFrame == this) {
// We always observe the child block. It will never send any
// notifications, but we need this so that the observer gets
// propagated to its kids.
return true;
}
rs = rs->mParentReflowInput;
if (!rs) {
return false;
}
// We always need to let the percent bsize observer be propagated
// from a table wrapper frame to an inner table frame.
LayoutFrameType fType = aReflowInput.mFrame->Type();
if (fType == LayoutFrameType::Table) {
return true;
}
// We need the observer to be propagated to all children of the cell
// (i.e., children of the child block) in quirks mode, but only to
// tables in standards mode.
// XXX This may not be true in the case of orthogonal flows within
// the cell (bug 1174711 comment 8); we may need to observe isizes
// instead of bsizes for orthogonal children.
return rs->mFrame == this &&
(PresContext()->CompatibilityMode() == eCompatibility_NavQuirks ||
fType == LayoutFrameType::TableWrapper);
}
nsresult nsTableCellFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
// We need to recalculate in this case because of the nowrap quirk in
// BasicTableLayoutStrategy
if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::nowrap &&
PresContext()->CompatibilityMode() == eCompatibility_NavQuirks) {
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::FrameAndAncestors,
NS_FRAME_IS_DIRTY);
}
if (aAttribute == nsGkAtoms::rowspan || aAttribute == nsGkAtoms::colspan) {
nsLayoutUtils::PostRestyleEvent(mContent->AsElement(), RestyleHint{0},
nsChangeHint_UpdateTableCellSpans);
}
return NS_OK;
}
/* virtual */
void nsTableCellFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) {
nsContainerFrame::DidSetComputedStyle(aOldComputedStyle);
nsTableFrame::PositionedTablePartMaybeChanged(this, aOldComputedStyle);
if (!aOldComputedStyle) {
return; // avoid the following on init
}
#ifdef ACCESSIBILITY
if (nsAccessibilityService* accService = GetAccService()) {
if (StyleBorder()->GetComputedBorder() !=
aOldComputedStyle->StyleBorder()->GetComputedBorder()) {
// If a table cell's computed border changes, it can change whether or
// not its parent table is classified as a layout or data table. We
// send a notification here to invalidate the a11y cache on the table
// so the next fetch of IsProbablyLayoutTable() is accurate.
accService->TableLayoutGuessMaybeChanged(PresShell(), mContent);
}
}
#endif
nsTableFrame* tableFrame = GetTableFrame();
if (tableFrame->IsBorderCollapse() &&
tableFrame->BCRecalcNeeded(aOldComputedStyle, Style())) {
uint32_t colIndex = ColIndex();
uint32_t rowIndex = RowIndex();
// row span needs to be clamped as we do not create rows in the cellmap
// which do not have cells originating in them
TableArea damageArea(colIndex, rowIndex, GetColSpan(),
std::min(static_cast<uint32_t>(GetRowSpan()),
tableFrame->GetRowCount() - rowIndex));
tableFrame->AddBCDamageArea(damageArea);
}
}
#ifdef DEBUG
void nsTableCellFrame::AppendFrames(ChildListID aListID,
nsFrameList&& aFrameList) {
MOZ_CRASH("unsupported operation");
}
void nsTableCellFrame::InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList&& aFrameList) {
MOZ_CRASH("unsupported operation");
}
void nsTableCellFrame::RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) {
MOZ_CRASH("unsupported operation");
}
#endif
void nsTableCellFrame::SetColIndex(int32_t aColIndex) { mColIndex = aColIndex; }
/* virtual */
nsMargin nsTableCellFrame::GetUsedMargin() const {
return nsMargin(0, 0, 0, 0);
}
// ASSURE DIFFERENT COLORS for selection
inline nscolor EnsureDifferentColors(nscolor colorA, nscolor colorB) {
if (colorA == colorB) {
nscolor res;
res = NS_RGB(NS_GET_R(colorA) ^ 0xff, NS_GET_G(colorA) ^ 0xff,
NS_GET_B(colorA) ^ 0xff);
return res;
}
return colorA;
}
void nsTableCellFrame::DecorateForSelection(DrawTarget* aDrawTarget,
nsPoint aPt) {
NS_ASSERTION(IsSelected(), "Should only be called for selected cells");
int16_t displaySelection;
nsPresContext* presContext = PresContext();
displaySelection = DetermineDisplaySelection();
if (displaySelection) {
RefPtr<nsFrameSelection> frameSelection =
presContext->PresShell()->FrameSelection();
if (frameSelection->IsInTableSelectionMode()) {
nscolor bordercolor;
if (displaySelection == nsISelectionController::SELECTION_DISABLED) {
bordercolor = NS_RGB(176, 176, 176); // disabled color
} else {
bordercolor = LookAndFeel::Color(LookAndFeel::ColorID::Highlight, this);
}
nscoord threePx = nsPresContext::CSSPixelsToAppUnits(3);
if ((mRect.width > threePx) && (mRect.height > threePx)) {
// compare bordercolor to background-color
bordercolor = EnsureDifferentColors(
bordercolor, StyleBackground()->BackgroundColor(this));
int32_t appUnitsPerDevPixel = PresContext()->AppUnitsPerDevPixel();
Point devPixelOffset = NSPointToPoint(aPt, appUnitsPerDevPixel);
AutoRestoreTransform autoRestoreTransform(aDrawTarget);
aDrawTarget->SetTransform(
aDrawTarget->GetTransform().PreTranslate(devPixelOffset));
ColorPattern color(ToDeviceColor(bordercolor));
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
StrokeLineWithSnapping(nsPoint(onePixel, 0), nsPoint(mRect.width, 0),
appUnitsPerDevPixel, *aDrawTarget, color);
StrokeLineWithSnapping(nsPoint(0, onePixel), nsPoint(0, mRect.height),
appUnitsPerDevPixel, *aDrawTarget, color);
StrokeLineWithSnapping(nsPoint(onePixel, mRect.height),
nsPoint(mRect.width, mRect.height),
appUnitsPerDevPixel, *aDrawTarget, color);
StrokeLineWithSnapping(nsPoint(mRect.width, onePixel),
nsPoint(mRect.width, mRect.height),
appUnitsPerDevPixel, *aDrawTarget, color);
// middle
nsRect r(onePixel, onePixel, mRect.width - onePixel,
mRect.height - onePixel);
Rect devPixelRect =
NSRectToSnappedRect(r, appUnitsPerDevPixel, *aDrawTarget);
aDrawTarget->StrokeRect(devPixelRect, color);
// shading
StrokeLineWithSnapping(
nsPoint(2 * onePixel, mRect.height - 2 * onePixel),
nsPoint(mRect.width - onePixel, mRect.height - (2 * onePixel)),
appUnitsPerDevPixel, *aDrawTarget, color);
StrokeLineWithSnapping(
nsPoint(mRect.width - (2 * onePixel), 2 * onePixel),
nsPoint(mRect.width - (2 * onePixel), mRect.height - onePixel),
appUnitsPerDevPixel, *aDrawTarget, color);
}
}
}
}
ImgDrawResult nsTableCellFrame::PaintBackground(gfxContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt, uint32_t aFlags) {
nsRect rect(aPt, GetSize());
nsCSSRendering::PaintBGParams params =
nsCSSRendering::PaintBGParams::ForAllLayers(*PresContext(), aDirtyRect,
rect, this, aFlags);
return nsCSSRendering::PaintStyleImageLayer(params, aRenderingContext);
}
nsresult nsTableCellFrame::ProcessBorders(nsTableFrame* aFrame,
nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
const nsStyleBorder* borderStyle = StyleBorder();
if (aFrame->IsBorderCollapse() || !borderStyle->HasBorder()) return NS_OK;
if (!GetContentEmpty() ||
StyleTableBorder()->mEmptyCells == StyleEmptyCells::Show) {
aLists.BorderBackground()->AppendNewToTop<nsDisplayBorder>(aBuilder, this);
}
return NS_OK;
}
void nsTableCellFrame::InvalidateFrame(uint32_t aDisplayItemKey,
bool aRebuildDisplayItems) {
nsIFrame::InvalidateFrame(aDisplayItemKey, aRebuildDisplayItems);
if (GetTableFrame()->IsBorderCollapse()) {
const bool rebuild = StaticPrefs::layout_display_list_retain_sc();
GetParent()->InvalidateFrameWithRect(InkOverflowRect() + GetPosition(),
aDisplayItemKey, rebuild);
}
}
void nsTableCellFrame::InvalidateFrameWithRect(const nsRect& aRect,
uint32_t aDisplayItemKey,
bool aRebuildDisplayItems) {
nsIFrame::InvalidateFrameWithRect(aRect, aDisplayItemKey,
aRebuildDisplayItems);
// If we have filters applied that would affects our bounds, then
// we get an inactive layer created and this is computed
// within FrameLayerBuilder
GetParent()->InvalidateFrameWithRect(aRect + GetPosition(), aDisplayItemKey,
aRebuildDisplayItems);
}
bool nsTableCellFrame::ShouldPaintBordersAndBackgrounds() const {
// If we're not visible, we don't paint.
if (!StyleVisibility()->IsVisible()) {
return false;
}
// Consider 'empty-cells', but only in separated borders mode.
if (!GetContentEmpty()) {
return true;
}
nsTableFrame* tableFrame = GetTableFrame();
if (tableFrame->IsBorderCollapse()) {
return true;
}
return StyleTableBorder()->mEmptyCells == StyleEmptyCells::Show;
}
bool nsTableCellFrame::ShouldPaintBackground(nsDisplayListBuilder* aBuilder) {
return ShouldPaintBordersAndBackgrounds();
}
LogicalSides nsTableCellFrame::GetLogicalSkipSides() const {
LogicalSides skip(mWritingMode);
if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Clone)) {
return skip;
}
if (GetPrevInFlow()) {
skip |= eLogicalSideBitsBStart;
}
if (GetNextInFlow()) {
skip |= eLogicalSideBitsBEnd;
}
return skip;
}
/* virtual */
nsMargin nsTableCellFrame::GetBorderOverflow() { return nsMargin(0, 0, 0, 0); }
// Align the cell's child frame within the cell
void nsTableCellFrame::BlockDirAlignChild(WritingMode aWM, nscoord aMaxAscent) {
/* It's the 'border-collapse' on the table that matters */
const LogicalMargin borderPadding =
GetLogicalUsedBorderAndPadding(GetWritingMode())
.ApplySkipSides(GetLogicalSkipSides())
.ConvertTo(aWM, GetWritingMode());
nscoord bStartInset = borderPadding.BStart(aWM);
nscoord bEndInset = borderPadding.BEnd(aWM);
nscoord bSize = BSize(aWM);
nsIFrame* firstKid = mFrames.FirstChild();
nsSize containerSize = mRect.Size();
NS_ASSERTION(firstKid,
"Frame construction error, a table cell always has "
"an inner cell frame");
LogicalRect kidRect = firstKid->GetLogicalRect(aWM, containerSize);
nscoord childBSize = kidRect.BSize(aWM);
// Vertically align the child
nscoord kidBStart = 0;
switch (GetVerticalAlign()) {
case StyleVerticalAlignKeyword::Baseline:
if (!GetContentEmpty()) {
// Align the baselines of the child frame with the baselines of
// other children in the same row which have 'vertical-align: baseline'
kidBStart = bStartInset + aMaxAscent - GetCellBaseline();
break;
}
// Empty cells don't participate in baseline alignment -
// fallback to start alignment.
[[fallthrough]];
case StyleVerticalAlignKeyword::Top:
// Align the top of the child frame with the top of the content area,
kidBStart = bStartInset;
break;
case StyleVerticalAlignKeyword::Bottom:
// Align the bottom of the child frame with the bottom of the content
// area,
kidBStart = bSize - childBSize - bEndInset;
break;
default:
case StyleVerticalAlignKeyword::Middle:
// Align the middle of the child frame with the middle of the content
// area,
kidBStart = (bSize - childBSize - bEndInset + bStartInset) / 2;
}
// If the content is larger than the cell bsize, align from bStartInset
// (cell's content-box bstart edge).
kidBStart = std::max(bStartInset, kidBStart);
if (kidBStart != kidRect.BStart(aWM)) {
// Invalidate at the old position first
firstKid->InvalidateFrameSubtree();
}
firstKid->SetPosition(aWM, LogicalPoint(aWM, kidRect.IStart(aWM), kidBStart),
containerSize);
ReflowOutput desiredSize(aWM);
desiredSize.SetSize(aWM, GetLogicalSize(aWM));
nsRect overflow(nsPoint(0, 0), GetSize());
overflow.Inflate(GetBorderOverflow());
desiredSize.mOverflowAreas.SetAllTo(overflow);
ConsiderChildOverflow(desiredSize.mOverflowAreas, firstKid);
FinishAndStoreOverflow(&desiredSize);
if (kidBStart != kidRect.BStart(aWM)) {
// Make sure any child views are correctly positioned. We know the inner
// table cell won't have a view
nsContainerFrame::PositionChildViews(firstKid);
// Invalidate new overflow rect
firstKid->InvalidateFrameSubtree();
}
if (HasView()) {
nsContainerFrame::SyncFrameViewAfterReflow(PresContext(), this, GetView(),
desiredSize.InkOverflow(),
ReflowChildFlags::Default);
}
}
bool nsTableCellFrame::ComputeCustomOverflow(OverflowAreas& aOverflowAreas) {
nsRect bounds(nsPoint(0, 0), GetSize());
bounds.Inflate(GetBorderOverflow());
aOverflowAreas.UnionAllWith(bounds);
return nsContainerFrame::ComputeCustomOverflow(aOverflowAreas);
}
// Per CSS 2.1, we map 'sub', 'super', 'text-top', 'text-bottom',
// length, percentage, and calc() values to 'baseline'.
StyleVerticalAlignKeyword nsTableCellFrame::GetVerticalAlign() const {
const StyleVerticalAlign& verticalAlign = StyleDisplay()->mVerticalAlign;
if (verticalAlign.IsKeyword()) {
auto value = verticalAlign.AsKeyword();
if (value == StyleVerticalAlignKeyword::Top ||
value == StyleVerticalAlignKeyword::Middle ||
value == StyleVerticalAlignKeyword::Bottom) {
return value;
}
}
return StyleVerticalAlignKeyword::Baseline;
}
bool nsTableCellFrame::CellHasVisibleContent(nscoord height,
nsTableFrame* tableFrame,
nsIFrame* kidFrame) {
// see http://www.w3.org/TR/CSS21/tables.html#empty-cells
if (height > 0) return true;
if (tableFrame->IsBorderCollapse()) return true;
for (nsIFrame* innerFrame : kidFrame->PrincipalChildList()) {
LayoutFrameType frameType = innerFrame->Type();
if (LayoutFrameType::Text == frameType) {
nsTextFrame* textFrame = static_cast<nsTextFrame*>(innerFrame);
if (textFrame->HasNoncollapsedCharacters()) return true;
} else if (LayoutFrameType::Placeholder != frameType) {
return true;
} else {
nsIFrame* floatFrame = nsLayoutUtils::GetFloatFromPlaceholder(innerFrame);
if (floatFrame) return true;
}
}
return false;
}
nscoord nsTableCellFrame::GetCellBaseline() const {
// Ignore the position of the inner frame relative to the cell frame
// since we want the position as though the inner were top-aligned.
nsIFrame* inner = mFrames.FirstChild();
const auto wm = GetWritingMode();
const auto borderPadding = GetLogicalUsedBorderAndPadding(wm);
nscoord result;
if (!StyleDisplay()->IsContainLayout() &&
nsLayoutUtils::GetFirstLineBaseline(wm, inner, &result)) {
return result + borderPadding.BStart(wm);
}
const auto logicalSize = inner->GetLogicalSize(wm);
// ::-moz-cell-content shouldn't have any border/padding.
return logicalSize.BSize(wm) + borderPadding.BStart(wm);
}
int32_t nsTableCellFrame::GetRowSpan() {
int32_t rowSpan = 1;
// Don't look at the content's rowspan if we're a pseudo cell
if (!Style()->IsPseudoOrAnonBox()) {
dom::Element* elem = mContent->AsElement();
const nsAttrValue* attr = elem->GetParsedAttr(nsGkAtoms::rowspan);
// Note that we don't need to check the tag name, because only table cells
// (including MathML <mtd>) and table headers parse the "rowspan" attribute
// into an integer.
if (attr && attr->Type() == nsAttrValue::eInteger) {
rowSpan = attr->GetIntegerValue();
}
}
return rowSpan;
}
int32_t nsTableCellFrame::GetColSpan() {
int32_t colSpan = 1;
// Don't look at the content's colspan if we're a pseudo cell
if (!Style()->IsPseudoOrAnonBox()) {
dom::Element* elem = mContent->AsElement();
const nsAttrValue* attr = elem->GetParsedAttr(
MOZ_UNLIKELY(elem->IsMathMLElement()) ? nsGkAtoms::columnspan_
: nsGkAtoms::colspan);
// Note that we don't need to check the tag name, because only table cells
// (including MathML <mtd>) and table headers parse the "colspan" attribute
// into an integer.
if (attr && attr->Type() == nsAttrValue::eInteger) {
colSpan = attr->GetIntegerValue();
}
}
return colSpan;
}
/* virtual */
nscoord nsTableCellFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord result = 0;
DISPLAY_MIN_INLINE_SIZE(this, result);
nsIFrame* inner = mFrames.FirstChild();
result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext, inner,
IntrinsicISizeType::MinISize);
return result;
}
/* virtual */
nscoord nsTableCellFrame::GetPrefISize(gfxContext* aRenderingContext) {
nscoord result = 0;
DISPLAY_PREF_INLINE_SIZE(this, result);
nsIFrame* inner = mFrames.FirstChild();
result = nsLayoutUtils::IntrinsicForContainer(aRenderingContext, inner,
IntrinsicISizeType::PrefISize);
return result;
}
/* virtual */ nsIFrame::IntrinsicSizeOffsetData
nsTableCellFrame::IntrinsicISizeOffsets(nscoord aPercentageBasis) {
IntrinsicSizeOffsetData result =
nsContainerFrame::IntrinsicISizeOffsets(aPercentageBasis);
result.margin = 0;
WritingMode wm = GetWritingMode();
result.border = GetBorderWidth(wm).IStartEnd(wm);
return result;
}
#ifdef DEBUG
# define PROBABLY_TOO_LARGE 1000000
static void DebugCheckChildSize(nsIFrame* aChild, ReflowOutput& aMet) {
WritingMode wm = aMet.GetWritingMode();
if ((aMet.ISize(wm) < 0) || (aMet.ISize(wm) > PROBABLY_TOO_LARGE)) {
printf("WARNING: cell content %p has large inline size %d \n",
static_cast<void*>(aChild), int32_t(aMet.ISize(wm)));
}
}
#endif
// the computed bsize for the cell, which descendants use for percent bsize
// calculations it is the bsize (minus border, padding) of the cell's first in
// flow during its final reflow without an unconstrained bsize.
static nscoord CalcUnpaginatedBSize(nsTableCellFrame& aCellFrame,
nsTableFrame& aTableFrame,
nscoord aBlockDirBorderPadding) {
const nsTableCellFrame* firstCellInFlow =
static_cast<nsTableCellFrame*>(aCellFrame.FirstInFlow());
nsTableFrame* firstTableInFlow =
static_cast<nsTableFrame*>(aTableFrame.FirstInFlow());
nsTableRowFrame* row =
static_cast<nsTableRowFrame*>(firstCellInFlow->GetParent());
nsTableRowGroupFrame* firstRGInFlow =
static_cast<nsTableRowGroupFrame*>(row->GetParent());
uint32_t rowIndex = firstCellInFlow->RowIndex();
int32_t rowSpan = aTableFrame.GetEffectiveRowSpan(*firstCellInFlow);
nscoord computedBSize =
firstTableInFlow->GetRowSpacing(rowIndex, rowIndex + rowSpan - 1);
computedBSize -= aBlockDirBorderPadding;
uint32_t rowX;
for (row = firstRGInFlow->GetFirstRow(), rowX = 0; row;
row = row->GetNextRow(), rowX++) {
if (rowX > rowIndex + rowSpan - 1) {
break;
} else if (rowX >= rowIndex) {
computedBSize += row->GetUnpaginatedBSize();
}
}
return computedBSize;
}
void nsTableCellFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsTableCellFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
if (aReflowInput.mFlags.mSpecialBSizeReflow) {
FirstInFlow()->AddStateBits(NS_TABLE_CELL_HAD_SPECIAL_REFLOW);
}
// see if a special bsize reflow needs to occur due to having a pct height
nsTableFrame::CheckRequestSpecialBSizeReflow(aReflowInput);
WritingMode wm = aReflowInput.GetWritingMode();
LogicalSize availSize = aReflowInput.AvailableSize();
LogicalMargin borderPadding =
aReflowInput.ComputedLogicalPadding(wm) + GetBorderWidth(wm);
ReflowOutput kidSize(wm);
SetPriorAvailISize(aReflowInput.AvailableISize());
nsIFrame* firstKid = mFrames.FirstChild();
NS_ASSERTION(
firstKid,
"Frame construction error, a table cell always has an inner cell frame");
nsTableFrame* tableFrame = GetTableFrame();
if (aReflowInput.mFlags.mSpecialBSizeReflow) {
const_cast<ReflowInput&>(aReflowInput)
.SetComputedBSize(BSize(wm) - borderPadding.BStartEnd(wm));
DISPLAY_REFLOW_CHANGE();
} else if (aPresContext->IsPaginated()) {
nscoord computedUnpaginatedBSize = CalcUnpaginatedBSize(
(nsTableCellFrame&)*this, *tableFrame, borderPadding.BStartEnd(wm));
if (computedUnpaginatedBSize > 0) {
const_cast<ReflowInput&>(aReflowInput)
.SetComputedBSize(computedUnpaginatedBSize);
DISPLAY_REFLOW_CHANGE();
}
}
// We need to apply the skip sides for current fragmentainer's border and
// padding after we finish calculating the special block-size or unpaginated
// block-size to prevent the skip sides from affecting the results.
//
// We assume we are the last fragment by using
// PreReflowBlockLevelLogicalSkipSides(), i.e. the block-end border and
// padding is not skipped.
borderPadding.ApplySkipSides(PreReflowBlockLevelLogicalSkipSides());
availSize.ISize(wm) -= borderPadding.IStartEnd(wm);
// If we have a constrained available block-size, shrink it by subtracting our
// block-direction border and padding for our children.
if (NS_UNCONSTRAINEDSIZE != availSize.BSize(wm)) {
availSize.BSize(wm) -= borderPadding.BStart(wm);
if (aReflowInput.mStyleBorder->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Clone) {
// We have box-decoration-break:clone. Subtract block-end border and
// padding from the available block-size as well.
availSize.BSize(wm) -= borderPadding.BEnd(wm);
}
}
// Available block-size can became negative after subtracting block-direction
// border and padding. Per spec, to guarantee progress, fragmentainers are
// assumed to have a minimum block size of 1px regardless of their used size.
// https://drafts.csswg.org/css-break/#breaking-rules
availSize.BSize(wm) =
std::max(availSize.BSize(wm), nsPresContext::CSSPixelsToAppUnits(1));
WritingMode kidWM = firstKid->GetWritingMode();
ReflowInput kidReflowInput(aPresContext, aReflowInput, firstKid,
availSize.ConvertTo(kidWM, wm));
// Don't be a percent height observer if we're in the middle of
// special-bsize reflow, in case we get an accidental NotifyPercentBSize()
// call (which we shouldn't honor during special-bsize reflow)
if (!aReflowInput.mFlags.mSpecialBSizeReflow) {
// mPercentBSizeObserver is for children of cells in quirks mode,
// but only those than are tables in standards mode. NeedsToObserve
// will determine how far this is propagated to descendants.
kidReflowInput.mPercentBSizeObserver = this;
}
// Don't propagate special bsize reflow input to our kids
kidReflowInput.mFlags.mSpecialBSizeReflow = false;
if (aReflowInput.mFlags.mSpecialBSizeReflow ||
FirstInFlow()->HasAnyStateBits(NS_TABLE_CELL_HAD_SPECIAL_REFLOW)) {
// We need to force the kid to have mBResize set if we've had a
// special reflow in the past, since the non-special reflow needs to
// resize back to what it was without the special bsize reflow.
kidReflowInput.SetBResize(true);
}
nsSize containerSize = aReflowInput.ComputedSizeAsContainerIfConstrained();
LogicalPoint kidOrigin(wm, borderPadding.IStart(wm),
borderPadding.BStart(wm));
nsRect origRect = firstKid->GetRect();
nsRect origInkOverflow = firstKid->InkOverflowRect();
bool firstReflow = firstKid->HasAnyStateBits(NS_FRAME_FIRST_REFLOW);
ReflowChild(firstKid, aPresContext, kidSize, kidReflowInput, wm, kidOrigin,
containerSize, ReflowChildFlags::Default, aStatus);
if (aStatus.IsOverflowIncomplete()) {
// Don't pass OVERFLOW_INCOMPLETE through tables until they can actually
// handle it
// XXX should paginate overflow as overflow, but not in this patch (bug
// 379349)
aStatus.SetIncomplete();
printf("Set table cell incomplete %p\n", static_cast<void*>(this));
}
// XXXbz is this invalidate actually needed, really?
if (HasAnyStateBits(NS_FRAME_IS_DIRTY)) {
InvalidateFrameSubtree();
}
#ifdef DEBUG
DebugCheckChildSize(firstKid, kidSize);
#endif
// 0 dimensioned cells need to be treated specially in Standard/NavQuirks mode
// see testcase "emptyCells.html"
nsIFrame* prevInFlow = GetPrevInFlow();
bool isEmpty;
if (prevInFlow) {
isEmpty = static_cast<nsTableCellFrame*>(prevInFlow)->GetContentEmpty();
} else {
isEmpty = !CellHasVisibleContent(kidSize.Height(), tableFrame, firstKid);
}
SetContentEmpty(isEmpty);
// Place the child
FinishReflowChild(firstKid, aPresContext, kidSize, &kidReflowInput, wm,
kidOrigin, containerSize, ReflowChildFlags::Default);
if (tableFrame->IsBorderCollapse()) {
nsTableFrame::InvalidateTableFrame(firstKid, origRect, origInkOverflow,
firstReflow);
}
// first, compute the bsize which can be set w/o being restricted by
// available bsize
LogicalSize cellSize(wm);
cellSize.BSize(wm) = kidSize.BSize(wm);
if (NS_UNCONSTRAINEDSIZE != cellSize.BSize(wm)) {
cellSize.BSize(wm) += borderPadding.BStart(wm);
if (aStatus.IsComplete() ||
aReflowInput.mStyleBorder->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Clone) {
cellSize.BSize(wm) += borderPadding.BEnd(wm);
}
}
// next determine the cell's isize
cellSize.ISize(wm) = kidSize.ISize(
wm); // at this point, we've factored in the cell's style attributes
// factor in border and padding
if (NS_UNCONSTRAINEDSIZE != cellSize.ISize(wm)) {
cellSize.ISize(wm) += borderPadding.IStartEnd(wm);
}
// set the cell's desired size and max element size
aDesiredSize.SetSize(wm, cellSize);
// the overflow area will be computed when BlockDirAlignChild() gets called
if (aReflowInput.mFlags.mSpecialBSizeReflow &&
NS_UNCONSTRAINEDSIZE == aReflowInput.AvailableBSize()) {
aDesiredSize.BSize(wm) = BSize(wm);
}
// If our parent is in initial reflow, it'll handle invalidating our
// entire overflow rect.
if (!GetParent()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW) &&
nsSize(aDesiredSize.Width(), aDesiredSize.Height()) != mRect.Size()) {
InvalidateFrame();
}
// remember the desired size for this reflow
SetDesiredSize(aDesiredSize);
// Any absolutely-positioned children will get reflowed in
// nsIFrame::FixupPositionedTableParts in another pass, so propagate our
// dirtiness to them before our parent clears our dirty bits.
PushDirtyBitToAbsoluteFrames();
}
/* ----- global methods ----- */
NS_QUERYFRAME_HEAD(nsTableCellFrame)
NS_QUERYFRAME_ENTRY(nsTableCellFrame)
NS_QUERYFRAME_ENTRY(nsITableCellLayout)
NS_QUERYFRAME_ENTRY(nsIPercentBSizeObserver)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
#ifdef ACCESSIBILITY
a11y::AccType nsTableCellFrame::AccessibleType() {
return a11y::eHTMLTableCellType;
}
#endif
/* This is primarily for editor access via nsITableLayout */
NS_IMETHODIMP
nsTableCellFrame::GetCellIndexes(int32_t& aRowIndex, int32_t& aColIndex) {
aRowIndex = RowIndex();
aColIndex = mColIndex;
return NS_OK;
}
nsTableCellFrame* NS_NewTableCellFrame(PresShell* aPresShell,
ComputedStyle* aStyle,
nsTableFrame* aTableFrame) {
if (aTableFrame->IsBorderCollapse())
return new (aPresShell) nsBCTableCellFrame(aStyle, aTableFrame);
else
return new (aPresShell) nsTableCellFrame(aStyle, aTableFrame);
}
NS_IMPL_FRAMEARENA_HELPERS(nsBCTableCellFrame)
LogicalMargin nsTableCellFrame::GetBorderWidth(WritingMode aWM) const {
return LogicalMargin(aWM, StyleBorder()->GetComputedBorder());
}
void nsTableCellFrame::AppendDirectlyOwnedAnonBoxes(
nsTArray<OwnedAnonBox>& aResult) {
nsIFrame* kid = mFrames.FirstChild();
MOZ_ASSERT(kid && !kid->GetNextSibling(),
"Table cells should have just one child");
aResult.AppendElement(OwnedAnonBox(kid));
}
#ifdef DEBUG_FRAME_DUMP
nsresult nsTableCellFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(u"TableCell"_ns, aResult);
}
#endif
// nsBCTableCellFrame
nsBCTableCellFrame::nsBCTableCellFrame(ComputedStyle* aStyle,
nsTableFrame* aTableFrame)
: nsTableCellFrame(aStyle, aTableFrame, kClassID) {
mBStartBorder = mIEndBorder = mBEndBorder = mIStartBorder = 0;
}
nsBCTableCellFrame::~nsBCTableCellFrame() = default;
/* virtual */
nsMargin nsBCTableCellFrame::GetUsedBorder() const {
WritingMode wm = GetWritingMode();
return GetBorderWidth(wm).GetPhysicalMargin(wm);
}
#ifdef DEBUG_FRAME_DUMP
nsresult nsBCTableCellFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(u"BCTableCell"_ns, aResult);
}
#endif
LogicalMargin nsBCTableCellFrame::GetBorderWidth(WritingMode aWM) const {
int32_t d2a = PresContext()->AppUnitsPerDevPixel();
return LogicalMargin(aWM, BC_BORDER_END_HALF_COORD(d2a, mBStartBorder),
BC_BORDER_START_HALF_COORD(d2a, mIEndBorder),
BC_BORDER_START_HALF_COORD(d2a, mBEndBorder),
BC_BORDER_END_HALF_COORD(d2a, mIStartBorder));
}
BCPixelSize nsBCTableCellFrame::GetBorderWidth(LogicalSide aSide) const {
switch (aSide) {
case eLogicalSideBStart:
return BC_BORDER_END_HALF(mBStartBorder);
case eLogicalSideIEnd:
return BC_BORDER_START_HALF(mIEndBorder);
case eLogicalSideBEnd:
return BC_BORDER_START_HALF(mBEndBorder);
default:
return BC_BORDER_END_HALF(mIStartBorder);
}
}
void nsBCTableCellFrame::SetBorderWidth(LogicalSide aSide, BCPixelSize aValue) {
switch (aSide) {
case eLogicalSideBStart:
mBStartBorder = aValue;
break;
case eLogicalSideIEnd:
mIEndBorder = aValue;
break;
case eLogicalSideBEnd:
mBEndBorder = aValue;
break;
default:
mIStartBorder = aValue;
}
}
/* virtual */
nsMargin nsBCTableCellFrame::GetBorderOverflow() {
WritingMode wm = GetWritingMode();
int32_t d2a = PresContext()->AppUnitsPerDevPixel();
LogicalMargin halfBorder(wm, BC_BORDER_START_HALF_COORD(d2a, mBStartBorder),
BC_BORDER_END_HALF_COORD(d2a, mIEndBorder),
BC_BORDER_END_HALF_COORD(d2a, mBEndBorder),
BC_BORDER_START_HALF_COORD(d2a, mIStartBorder));
return halfBorder.GetPhysicalMargin(wm);
}
ImgDrawResult nsBCTableCellFrame::PaintBackground(gfxContext& aRenderingContext,
const nsRect& aDirtyRect,
nsPoint aPt,
uint32_t aFlags) {
// make border-width reflect the half of the border-collapse
// assigned border that's inside the cell
WritingMode wm = GetWritingMode();
nsMargin borderWidth = GetBorderWidth(wm).GetPhysicalMargin(wm);
nsStyleBorder myBorder(*StyleBorder());
for (const auto side : mozilla::AllPhysicalSides()) {
myBorder.SetBorderWidth(side, borderWidth.Side(side));
}
// bypassing nsCSSRendering::PaintBackground is safe because this kind
// of frame cannot be used for the root element
nsRect rect(aPt, GetSize());
nsCSSRendering::PaintBGParams params =
nsCSSRendering::PaintBGParams::ForAllLayers(*PresContext(), aDirtyRect,
rect, this, aFlags);
return nsCSSRendering::PaintStyleImageLayerWithSC(params, aRenderingContext,
Style(), myBorder);
}
namespace mozilla {
class nsDisplayTableCellSelection final : public nsPaintedDisplayItem {
public:
nsDisplayTableCellSelection(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayTableCellSelection);
}
MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayTableCellSelection)
void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override {
static_cast<nsTableCellFrame*>(mFrame)->DecorateForSelection(
aCtx->GetDrawTarget(), ToReferenceFrame());
}
NS_DISPLAY_DECL_NAME("TableCellSelection", TYPE_TABLE_CELL_SELECTION)
bool CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) override {
RefPtr<nsFrameSelection> frameSelection =
mFrame->PresShell()->FrameSelection();
return !frameSelection->IsInTableSelectionMode();
}
};
} // namespace mozilla
void nsTableCellFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
DO_GLOBAL_REFLOW_COUNT_DSP("nsTableCellFrame");
if (ShouldPaintBordersAndBackgrounds()) {
// display outset box-shadows if we need to.
bool hasBoxShadow = !StyleEffects()->mBoxShadow.IsEmpty();
if (hasBoxShadow) {
aLists.BorderBackground()->AppendNewToTop<nsDisplayBoxShadowOuter>(
aBuilder, this);
}
nsRect bgRect = GetRectRelativeToSelf() + aBuilder->ToReferenceFrame(this);
// display background if we need to.
const AppendedBackgroundType result =
nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
aBuilder, this, bgRect, aLists.BorderBackground());
if (result == AppendedBackgroundType::None) {
aBuilder->BuildCompositorHitTestInfoIfNeeded(this,
aLists.BorderBackground());
}
// display inset box-shadows if we need to.
if (hasBoxShadow) {
aLists.BorderBackground()->AppendNewToTop<nsDisplayBoxShadowInner>(
aBuilder, this);
}
// display borders if we need to
nsTableFrame* tableFrame = GetTableFrame();
ProcessBorders(tableFrame, aBuilder, aLists);
// and display the selection border if we need to
if (IsSelected()) {
aLists.BorderBackground()->AppendNewToTop<nsDisplayTableCellSelection>(
aBuilder, this);
}
// This can be null if display list building initiated in the middle
// of the table, which can happen with background-clip:text and
// -moz-element.
nsDisplayTableBackgroundSet* backgrounds =
aBuilder->GetTableBackgroundSet();
if (backgrounds) {
// Compute bgRect relative to reference frame, but using the
// normal (without position:relative offsets) positions for the
// cell, row and row group.
bgRect = GetRectRelativeToSelf() + GetNormalPosition();
nsTableRowFrame* row = GetTableRowFrame();
bgRect += row->GetNormalPosition();
nsTableRowGroupFrame* rowGroup = row->GetTableRowGroupFrame();
bgRect += rowGroup->GetNormalPosition();
bgRect += backgrounds->TableToReferenceFrame();
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
nsDisplayListBuilder::AutoCurrentActiveScrolledRootSetter asrSetter(
aBuilder);
if (IsStackingContext() || row->IsStackingContext() ||
rowGroup->IsStackingContext() || tableFrame->IsStackingContext()) {
// The col/colgroup items we create below will be inserted directly into
// the BorderBackgrounds list of the table frame. That means that
// they'll be moved *outside* of any wrapper items created for any
// frames between this table cell frame and the table wrapper frame, and
// will not participate in those frames's opacity / transform / filter /
// mask effects. If one of those frames is a stacking context, then we
// may have one or more of those wrapper items, and one of them may have
// captured a clip. In order to ensure correct clipping and scrolling of
// the col/colgroup items, restore the clip and ASR that we observed
// when we entered the table frame. If that frame is a stacking context
// but doesn't have any clip capturing wrapper items, then we'll
// double-apply the clip. That's ok.
clipState.SetClipChainForContainingBlockDescendants(
backgrounds->GetTableClipChain());
asrSetter.SetCurrentActiveScrolledRoot(backgrounds->GetTableASR());
}
// Create backgrounds items as needed for the column and column
// group that this cell occupies.
nsTableColFrame* col = backgrounds->GetColForIndex(ColIndex());
nsTableColGroupFrame* colGroup = col->GetTableColGroupFrame();
Maybe<nsDisplayListBuilder::AutoBuildingDisplayList> buildingForColGroup;
nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
aBuilder, colGroup, bgRect, backgrounds->ColGroupBackgrounds(), false,
colGroup->GetRect() + backgrounds->TableToReferenceFrame(), this,
&buildingForColGroup);
Maybe<nsDisplayListBuilder::AutoBuildingDisplayList> buildingForCol;
nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
aBuilder, col, bgRect, backgrounds->ColBackgrounds(), false,
col->GetRect() + colGroup->GetPosition() +
backgrounds->TableToReferenceFrame(),
this, &buildingForCol);
}
}
// the 'empty-cells' property has no effect on 'outline'
DisplayOutline(aBuilder, aLists);
nsIFrame* kid = mFrames.FirstChild();
NS_ASSERTION(kid && !kid->GetNextSibling(),
"Table cells should have just one child");
// The child's background will go in our BorderBackground() list.
// This isn't a problem since it won't have a real background except for
// event handling. We do not call BuildDisplayListForNonBlockChildren
// because that/ would put the child's background in the Content() list
// which isn't right (e.g., would end up on top of our child floats for
// event handling).
BuildDisplayListForChild(aBuilder, kid, aLists);
}
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