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-rw-r--r--layout/mathml/nsMathMLmtableFrame.cpp1221
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diff --git a/layout/mathml/nsMathMLmtableFrame.cpp b/layout/mathml/nsMathMLmtableFrame.cpp
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index 0000000000..42af4e21cf
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+++ b/layout/mathml/nsMathMLmtableFrame.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gfxContext.h"
+#include "nsMathMLmtableFrame.h"
+#include "nsPresContext.h"
+#include "nsStyleConsts.h"
+#include "nsNameSpaceManager.h"
+#include "nsCSSRendering.h"
+#include "mozilla/dom/MathMLElement.h"
+
+#include "nsCRT.h"
+#include "nsTArray.h"
+#include "nsTableFrame.h"
+#include "celldata.h"
+
+#include "mozilla/PresShell.h"
+#include "mozilla/RestyleManager.h"
+#include <algorithm>
+
+#include "nsIScriptError.h"
+#include "nsContentUtils.h"
+#include "nsLayoutUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::image;
+using mozilla::dom::Element;
+
+//
+// <mtable> -- table or matrix - implementation
+//
+
+static int8_t ParseStyleValue(nsAtom* aAttribute,
+ const nsAString& aAttributeValue) {
+ if (aAttribute == nsGkAtoms::rowalign_) {
+ if (aAttributeValue.EqualsLiteral("top")) {
+ return static_cast<int8_t>(StyleVerticalAlignKeyword::Top);
+ }
+ if (aAttributeValue.EqualsLiteral("bottom")) {
+ return static_cast<int8_t>(StyleVerticalAlignKeyword::Bottom);
+ }
+ if (aAttributeValue.EqualsLiteral("center")) {
+ return static_cast<int8_t>(StyleVerticalAlignKeyword::Middle);
+ }
+ return static_cast<int8_t>(StyleVerticalAlignKeyword::Baseline);
+ }
+
+ if (aAttribute == nsGkAtoms::columnalign_) {
+ if (aAttributeValue.EqualsLiteral("left")) {
+ return int8_t(StyleTextAlign::Left);
+ }
+ if (aAttributeValue.EqualsLiteral("right")) {
+ return int8_t(StyleTextAlign::Right);
+ }
+ return int8_t(StyleTextAlign::Center);
+ }
+
+ if (aAttribute == nsGkAtoms::rowlines_ ||
+ aAttribute == nsGkAtoms::columnlines_) {
+ if (aAttributeValue.EqualsLiteral("solid")) {
+ return static_cast<int8_t>(StyleBorderStyle::Solid);
+ }
+ if (aAttributeValue.EqualsLiteral("dashed")) {
+ return static_cast<int8_t>(StyleBorderStyle::Dashed);
+ }
+ return static_cast<int8_t>(StyleBorderStyle::None);
+ }
+
+ MOZ_CRASH("Unrecognized attribute.");
+ return -1;
+}
+
+static nsTArray<int8_t>* ExtractStyleValues(const nsAString& aString,
+ nsAtom* aAttribute,
+ bool aAllowMultiValues) {
+ nsTArray<int8_t>* styleArray = nullptr;
+
+ const char16_t* start = aString.BeginReading();
+ const char16_t* end = aString.EndReading();
+
+ int32_t startIndex = 0;
+ int32_t count = 0;
+
+ while (start < end) {
+ // Skip leading spaces.
+ while ((start < end) && nsCRT::IsAsciiSpace(*start)) {
+ start++;
+ startIndex++;
+ }
+
+ // Look for the end of the string, or another space.
+ while ((start < end) && !nsCRT::IsAsciiSpace(*start)) {
+ start++;
+ count++;
+ }
+
+ // Grab the value found and process it.
+ if (count > 0) {
+ if (!styleArray) styleArray = new nsTArray<int8_t>();
+
+ // We want to return a null array if an attribute gives multiple values,
+ // but multiple values aren't allowed.
+ if (styleArray->Length() > 1 && !aAllowMultiValues) {
+ delete styleArray;
+ return nullptr;
+ }
+
+ nsDependentSubstring valueString(aString, startIndex, count);
+ int8_t styleValue = ParseStyleValue(aAttribute, valueString);
+ styleArray->AppendElement(styleValue);
+
+ startIndex += count;
+ count = 0;
+ }
+ }
+ return styleArray;
+}
+
+static nsresult ReportParseError(nsIFrame* aFrame, const char16_t* aAttribute,
+ const char16_t* aValue) {
+ nsIContent* content = aFrame->GetContent();
+
+ AutoTArray<nsString, 3> params;
+ params.AppendElement(aValue);
+ params.AppendElement(aAttribute);
+ params.AppendElement(nsDependentAtomString(content->NodeInfo()->NameAtom()));
+
+ return nsContentUtils::ReportToConsole(
+ nsIScriptError::errorFlag, "Layout: MathML"_ns, content->OwnerDoc(),
+ nsContentUtils::eMATHML_PROPERTIES, "AttributeParsingError", params);
+}
+
+// Each rowalign='top bottom' or columnalign='left right center' (from
+// <mtable> or <mtr>) is split once into an nsTArray<int8_t> which is
+// stored in the property table. Row/Cell frames query the property table
+// to see what values apply to them.
+
+NS_DECLARE_FRAME_PROPERTY_DELETABLE(RowAlignProperty, nsTArray<int8_t>)
+NS_DECLARE_FRAME_PROPERTY_DELETABLE(RowLinesProperty, nsTArray<int8_t>)
+NS_DECLARE_FRAME_PROPERTY_DELETABLE(ColumnAlignProperty, nsTArray<int8_t>)
+NS_DECLARE_FRAME_PROPERTY_DELETABLE(ColumnLinesProperty, nsTArray<int8_t>)
+
+static const FramePropertyDescriptor<nsTArray<int8_t>>* AttributeToProperty(
+ nsAtom* aAttribute) {
+ if (aAttribute == nsGkAtoms::rowalign_) return RowAlignProperty();
+ if (aAttribute == nsGkAtoms::rowlines_) return RowLinesProperty();
+ if (aAttribute == nsGkAtoms::columnalign_) return ColumnAlignProperty();
+ NS_ASSERTION(aAttribute == nsGkAtoms::columnlines_, "Invalid attribute");
+ return ColumnLinesProperty();
+}
+
+/* This method looks for a property that applies to a cell, but it looks
+ * recursively because some cell properties can come from the cell, a row,
+ * a table, etc. This function searches through the hierarchy for a property
+ * and returns its value. The function stops searching after checking a <mtable>
+ * frame.
+ */
+static nsTArray<int8_t>* FindCellProperty(
+ const nsIFrame* aCellFrame,
+ const FramePropertyDescriptor<nsTArray<int8_t>>* aFrameProperty) {
+ const nsIFrame* currentFrame = aCellFrame;
+ nsTArray<int8_t>* propertyData = nullptr;
+
+ while (currentFrame) {
+ propertyData = currentFrame->GetProperty(aFrameProperty);
+ bool frameIsTable = (currentFrame->IsTableFrame());
+
+ if (propertyData || frameIsTable)
+ currentFrame = nullptr; // A null frame pointer exits the loop
+ else
+ currentFrame = currentFrame->GetParent(); // Go to the parent frame
+ }
+
+ return propertyData;
+}
+
+static void ApplyBorderToStyle(const nsMathMLmtdFrame* aFrame,
+ nsStyleBorder& aStyleBorder) {
+ uint32_t rowIndex = aFrame->RowIndex();
+ uint32_t columnIndex = aFrame->ColIndex();
+
+ nscoord borderWidth = nsPresContext::CSSPixelsToAppUnits(1);
+
+ nsTArray<int8_t>* rowLinesList = FindCellProperty(aFrame, RowLinesProperty());
+
+ nsTArray<int8_t>* columnLinesList =
+ FindCellProperty(aFrame, ColumnLinesProperty());
+
+ const auto a2d = aFrame->PresContext()->AppUnitsPerDevPixel();
+
+ // We don't place a row line on top of the first row
+ if (rowIndex > 0 && rowLinesList) {
+ // If the row number is greater than the number of provided rowline
+ // values, we simply repeat the last value.
+ uint32_t listLength = rowLinesList->Length();
+ if (rowIndex < listLength) {
+ aStyleBorder.SetBorderStyle(
+ eSideTop,
+ static_cast<StyleBorderStyle>(rowLinesList->ElementAt(rowIndex - 1)));
+ } else {
+ aStyleBorder.SetBorderStyle(eSideTop,
+ static_cast<StyleBorderStyle>(
+ rowLinesList->ElementAt(listLength - 1)));
+ }
+ aStyleBorder.SetBorderWidth(eSideTop, borderWidth, a2d);
+ }
+
+ // We don't place a column line on the left of the first column.
+ if (columnIndex > 0 && columnLinesList) {
+ // If the column number is greater than the number of provided columline
+ // values, we simply repeat the last value.
+ uint32_t listLength = columnLinesList->Length();
+ if (columnIndex < listLength) {
+ aStyleBorder.SetBorderStyle(
+ eSideLeft, static_cast<StyleBorderStyle>(
+ columnLinesList->ElementAt(columnIndex - 1)));
+ } else {
+ aStyleBorder.SetBorderStyle(
+ eSideLeft, static_cast<StyleBorderStyle>(
+ columnLinesList->ElementAt(listLength - 1)));
+ }
+ aStyleBorder.SetBorderWidth(eSideLeft, borderWidth, a2d);
+ }
+}
+
+static nsMargin ComputeBorderOverflow(nsMathMLmtdFrame* aFrame,
+ const nsStyleBorder& aStyleBorder) {
+ nsMargin overflow;
+ int32_t rowIndex;
+ int32_t columnIndex;
+ nsTableFrame* table = aFrame->GetTableFrame();
+ aFrame->GetCellIndexes(rowIndex, columnIndex);
+ if (!columnIndex) {
+ overflow.left = table->GetColSpacing(-1);
+ overflow.right = table->GetColSpacing(0) / 2;
+ } else if (columnIndex == table->GetColCount() - 1) {
+ overflow.left = table->GetColSpacing(columnIndex - 1) / 2;
+ overflow.right = table->GetColSpacing(columnIndex + 1);
+ } else {
+ overflow.left = table->GetColSpacing(columnIndex - 1) / 2;
+ overflow.right = table->GetColSpacing(columnIndex) / 2;
+ }
+ if (!rowIndex) {
+ overflow.top = table->GetRowSpacing(-1);
+ overflow.bottom = table->GetRowSpacing(0) / 2;
+ } else if (rowIndex == table->GetRowCount() - 1) {
+ overflow.top = table->GetRowSpacing(rowIndex - 1) / 2;
+ overflow.bottom = table->GetRowSpacing(rowIndex + 1);
+ } else {
+ overflow.top = table->GetRowSpacing(rowIndex - 1) / 2;
+ overflow.bottom = table->GetRowSpacing(rowIndex) / 2;
+ }
+ return overflow;
+}
+
+/*
+ * A variant of the nsDisplayBorder contains special code to render a border
+ * around a nsMathMLmtdFrame based on the rowline and columnline properties
+ * set on the cell frame.
+ */
+class nsDisplaymtdBorder final : public nsDisplayBorder {
+ public:
+ nsDisplaymtdBorder(nsDisplayListBuilder* aBuilder, nsMathMLmtdFrame* aFrame)
+ : nsDisplayBorder(aBuilder, aFrame) {}
+
+ virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
+ bool* aSnap) const override {
+ *aSnap = true;
+ nsStyleBorder styleBorder = *mFrame->StyleBorder();
+ nsMathMLmtdFrame* frame = static_cast<nsMathMLmtdFrame*>(mFrame);
+ ApplyBorderToStyle(frame, styleBorder);
+ nsRect bounds = CalculateBounds<nsRect>(styleBorder);
+ nsMargin overflow = ComputeBorderOverflow(frame, styleBorder);
+ bounds.Inflate(overflow);
+ return bounds;
+ }
+
+ virtual void Paint(nsDisplayListBuilder* aBuilder,
+ gfxContext* aCtx) override {
+ nsStyleBorder styleBorder = *mFrame->StyleBorder();
+ nsMathMLmtdFrame* frame = static_cast<nsMathMLmtdFrame*>(mFrame);
+ ApplyBorderToStyle(frame, styleBorder);
+
+ nsRect bounds = nsRect(ToReferenceFrame(), mFrame->GetSize());
+ nsMargin overflow = ComputeBorderOverflow(frame, styleBorder);
+ bounds.Inflate(overflow);
+
+ PaintBorderFlags flags = aBuilder->ShouldSyncDecodeImages()
+ ? PaintBorderFlags::SyncDecodeImages
+ : PaintBorderFlags();
+
+ Unused << nsCSSRendering::PaintBorderWithStyleBorder(
+ mFrame->PresContext(), *aCtx, mFrame, GetPaintRect(aBuilder, aCtx),
+ bounds, styleBorder, mFrame->Style(), flags, mFrame->GetSkipSides());
+ }
+
+ bool CreateWebRenderCommands(
+ mozilla::wr::DisplayListBuilder& aBuilder,
+ mozilla::wr::IpcResourceUpdateQueue& aResources,
+ const StackingContextHelper& aSc,
+ mozilla::layers::RenderRootStateManager* aManager,
+ nsDisplayListBuilder* aDisplayListBuilder) override {
+ return false;
+ }
+
+ virtual bool IsInvisibleInRect(const nsRect& aRect) const override {
+ return false;
+ }
+};
+
+#ifdef DEBUG
+# define DEBUG_VERIFY_THAT_FRAME_IS(_frame, _expected) \
+ MOZ_ASSERT( \
+ mozilla::StyleDisplay::_expected == _frame->StyleDisplay()->mDisplay, \
+ "internal error");
+#else
+# define DEBUG_VERIFY_THAT_FRAME_IS(_frame, _expected)
+#endif
+
+static void ParseFrameAttribute(nsIFrame* aFrame, nsAtom* aAttribute,
+ bool aAllowMultiValues) {
+ nsAutoString attrValue;
+
+ Element* frameElement = aFrame->GetContent()->AsElement();
+ frameElement->GetAttr(kNameSpaceID_None, aAttribute, attrValue);
+
+ if (!attrValue.IsEmpty()) {
+ nsTArray<int8_t>* valueList =
+ ExtractStyleValues(attrValue, aAttribute, aAllowMultiValues);
+
+ // If valueList is null, that indicates a problem with the attribute value.
+ // Only set properties on a valid attribute value.
+ if (valueList) {
+ // The code reading the property assumes that this list is nonempty.
+ NS_ASSERTION(valueList->Length() >= 1, "valueList should not be empty!");
+ aFrame->SetProperty(AttributeToProperty(aAttribute), valueList);
+ } else {
+ ReportParseError(aFrame, aAttribute->GetUTF16String(), attrValue.get());
+ }
+ }
+}
+
+// rowspacing
+//
+// Specifies the distance between successive rows in an mtable. Multiple
+// lengths can be specified, each corresponding to its respective position
+// between rows. For example:
+//
+// [ROW_0]
+// rowspace_0
+// [ROW_1]
+// rowspace_1
+// [ROW_2]
+//
+// If the number of row gaps exceeds the number of lengths specified, the final
+// specified length is repeated. Additional lengths are ignored.
+//
+// values: (length)+
+// default: 1.0ex
+//
+// Unitless values are permitted and provide a multiple of the default value
+// Negative values are forbidden.
+//
+
+// columnspacing
+//
+// Specifies the distance between successive columns in an mtable. Multiple
+// lengths can be specified, each corresponding to its respective position
+// between columns. For example:
+//
+// [COLUMN_0] columnspace_0 [COLUMN_1] columnspace_1 [COLUMN_2]
+//
+// If the number of column gaps exceeds the number of lengths specified, the
+// final specified length is repeated. Additional lengths are ignored.
+//
+// values: (length)+
+// default: 0.8em
+//
+// Unitless values are permitted and provide a multiple of the default value
+// Negative values are forbidden.
+//
+
+// framespacing
+//
+// Specifies the distance between the mtable and its frame (if any). The
+// first value specified provides the spacing between the left and right edge
+// of the table and the frame, the second value determines the spacing between
+// the top and bottom edges and the frame.
+//
+// An error is reported if only one length is passed. Any additional lengths
+// are ignored
+//
+// values: length length
+// default: 0em 0ex If frame attribute is "none" or not specified,
+// 0.4em 0.5ex otherwise
+//
+// Unitless values are permitted and provide a multiple of the default value
+// Negative values are forbidden.
+//
+
+static const float kDefaultRowspacingEx = 1.0f;
+static const float kDefaultColumnspacingEm = 0.8f;
+static const float kDefaultFramespacingArg0Em = 0.4f;
+static const float kDefaultFramespacingArg1Ex = 0.5f;
+
+static void ExtractSpacingValues(const nsAString& aString, nsAtom* aAttribute,
+ nsTArray<nscoord>& aSpacingArray,
+ nsIFrame* aFrame, nscoord aDefaultValue0,
+ nscoord aDefaultValue1,
+ float aFontSizeInflation) {
+ nsPresContext* presContext = aFrame->PresContext();
+ ComputedStyle* computedStyle = aFrame->Style();
+
+ const char16_t* start = aString.BeginReading();
+ const char16_t* end = aString.EndReading();
+
+ int32_t startIndex = 0;
+ int32_t count = 0;
+ int32_t elementNum = 0;
+
+ while (start < end) {
+ // Skip leading spaces.
+ while ((start < end) && nsCRT::IsAsciiSpace(*start)) {
+ start++;
+ startIndex++;
+ }
+
+ // Look for the end of the string, or another space.
+ while ((start < end) && !nsCRT::IsAsciiSpace(*start)) {
+ start++;
+ count++;
+ }
+
+ // Grab the value found and process it.
+ if (count > 0) {
+ const nsAString& str = Substring(aString, startIndex, count);
+ nsAutoString valueString;
+ valueString.Assign(str);
+ nscoord newValue;
+ if (aAttribute == nsGkAtoms::framespacing_ && elementNum) {
+ newValue = aDefaultValue1;
+ } else {
+ newValue = aDefaultValue0;
+ }
+ nsMathMLFrame::ParseNumericValue(valueString, &newValue, 0, presContext,
+ computedStyle, aFontSizeInflation);
+ aSpacingArray.AppendElement(newValue);
+
+ startIndex += count;
+ count = 0;
+ elementNum++;
+ }
+ }
+}
+
+static void ParseSpacingAttribute(nsMathMLmtableFrame* aFrame,
+ nsAtom* aAttribute) {
+ NS_ASSERTION(aAttribute == nsGkAtoms::rowspacing_ ||
+ aAttribute == nsGkAtoms::columnspacing_ ||
+ aAttribute == nsGkAtoms::framespacing_,
+ "Non spacing attribute passed");
+
+ nsAutoString attrValue;
+ Element* frameElement = aFrame->GetContent()->AsElement();
+ frameElement->GetAttr(kNameSpaceID_None, aAttribute, attrValue);
+
+ if (nsGkAtoms::framespacing_ == aAttribute) {
+ nsAutoString frame;
+ frameElement->GetAttr(kNameSpaceID_None, nsGkAtoms::frame, frame);
+ if (frame.IsEmpty() || frame.EqualsLiteral("none")) {
+ aFrame->SetFrameSpacing(0, 0);
+ return;
+ }
+ }
+
+ nscoord value;
+ nscoord value2;
+ // Set defaults
+ float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(aFrame);
+ RefPtr<nsFontMetrics> fm =
+ nsLayoutUtils::GetFontMetricsForFrame(aFrame, fontSizeInflation);
+ if (nsGkAtoms::rowspacing_ == aAttribute) {
+ value = kDefaultRowspacingEx * fm->XHeight();
+ value2 = 0;
+ } else if (nsGkAtoms::columnspacing_ == aAttribute) {
+ value = kDefaultColumnspacingEm * fm->EmHeight();
+ value2 = 0;
+ } else {
+ value = kDefaultFramespacingArg0Em * fm->EmHeight();
+ value2 = kDefaultFramespacingArg1Ex * fm->XHeight();
+ }
+
+ nsTArray<nscoord> valueList;
+ ExtractSpacingValues(attrValue, aAttribute, valueList, aFrame, value, value2,
+ fontSizeInflation);
+ if (valueList.Length() == 0) {
+ if (frameElement->HasAttr(kNameSpaceID_None, aAttribute)) {
+ ReportParseError(aFrame, aAttribute->GetUTF16String(), attrValue.get());
+ }
+ valueList.AppendElement(value);
+ }
+ if (aAttribute == nsGkAtoms::framespacing_) {
+ if (valueList.Length() == 1) {
+ if (frameElement->HasAttr(kNameSpaceID_None, aAttribute)) {
+ ReportParseError(aFrame, aAttribute->GetUTF16String(), attrValue.get());
+ }
+ valueList.AppendElement(value2);
+ } else if (valueList.Length() != 2) {
+ ReportParseError(aFrame, aAttribute->GetUTF16String(), attrValue.get());
+ }
+ }
+
+ if (aAttribute == nsGkAtoms::rowspacing_) {
+ aFrame->SetRowSpacingArray(valueList);
+ } else if (aAttribute == nsGkAtoms::columnspacing_) {
+ aFrame->SetColSpacingArray(valueList);
+ } else {
+ aFrame->SetFrameSpacing(valueList.ElementAt(0), valueList.ElementAt(1));
+ }
+}
+
+static void ParseSpacingAttributes(nsMathMLmtableFrame* aTableFrame) {
+ ParseSpacingAttribute(aTableFrame, nsGkAtoms::rowspacing_);
+ ParseSpacingAttribute(aTableFrame, nsGkAtoms::columnspacing_);
+ ParseSpacingAttribute(aTableFrame, nsGkAtoms::framespacing_);
+ aTableFrame->SetUseCSSSpacing();
+}
+
+// map all attributes within a table -- requires the indices of rows and cells.
+// so it can only happen after they are made ready by the table base class.
+static void MapAllAttributesIntoCSS(nsMathMLmtableFrame* aTableFrame) {
+ // Map mtable rowalign & rowlines.
+ ParseFrameAttribute(aTableFrame, nsGkAtoms::rowalign_, true);
+ ParseFrameAttribute(aTableFrame, nsGkAtoms::rowlines_, true);
+
+ // Map mtable columnalign & columnlines.
+ ParseFrameAttribute(aTableFrame, nsGkAtoms::columnalign_, true);
+ ParseFrameAttribute(aTableFrame, nsGkAtoms::columnlines_, true);
+
+ // Map mtable rowspacing, columnspacing & framespacing
+ ParseSpacingAttributes(aTableFrame);
+
+ // mtable is simple and only has one (pseudo) row-group
+ nsIFrame* rgFrame = aTableFrame->PrincipalChildList().FirstChild();
+ if (!rgFrame || !rgFrame->IsTableRowGroupFrame()) return;
+
+ for (nsIFrame* rowFrame : rgFrame->PrincipalChildList()) {
+ DEBUG_VERIFY_THAT_FRAME_IS(rowFrame, TableRow);
+ if (rowFrame->IsTableRowFrame()) {
+ // Map row rowalign.
+ ParseFrameAttribute(rowFrame, nsGkAtoms::rowalign_, false);
+ // Map row columnalign.
+ ParseFrameAttribute(rowFrame, nsGkAtoms::columnalign_, true);
+
+ for (nsIFrame* cellFrame : rowFrame->PrincipalChildList()) {
+ DEBUG_VERIFY_THAT_FRAME_IS(cellFrame, TableCell);
+ if (cellFrame->IsTableCellFrame()) {
+ // Map cell rowalign.
+ ParseFrameAttribute(cellFrame, nsGkAtoms::rowalign_, false);
+ // Map row columnalign.
+ ParseFrameAttribute(cellFrame, nsGkAtoms::columnalign_, false);
+ }
+ }
+ }
+ }
+}
+
+// the align attribute of mtable can have a row number which indicates
+// from where to anchor the table, e.g., top 5 means anchor the table at
+// the top of the 5th row, axis -1 means anchor the table on the axis of
+// the last row
+
+// The REC says that the syntax is
+// '\s*(top|bottom|center|baseline|axis)(\s+-?[0-9]+)?\s*'
+// the parsing could have been simpler with that syntax
+// but for backward compatibility we make optional
+// the whitespaces between the alignment name and the row number
+
+enum eAlign {
+ eAlign_top,
+ eAlign_bottom,
+ eAlign_center,
+ eAlign_baseline,
+ eAlign_axis
+};
+
+static void ParseAlignAttribute(nsString& aValue, eAlign& aAlign,
+ int32_t& aRowIndex) {
+ // by default, the table is centered about the axis
+ aRowIndex = 0;
+ aAlign = eAlign_axis;
+ int32_t len = 0;
+
+ // we only have to remove the leading spaces because
+ // ToInteger ignores the whitespaces around the number
+ aValue.CompressWhitespace(true, false);
+
+ if (0 == aValue.Find(u"top")) {
+ len = 3; // 3 is the length of 'top'
+ aAlign = eAlign_top;
+ } else if (0 == aValue.Find(u"bottom")) {
+ len = 6; // 6 is the length of 'bottom'
+ aAlign = eAlign_bottom;
+ } else if (0 == aValue.Find(u"center")) {
+ len = 6; // 6 is the length of 'center'
+ aAlign = eAlign_center;
+ } else if (0 == aValue.Find(u"baseline")) {
+ len = 8; // 8 is the length of 'baseline'
+ aAlign = eAlign_baseline;
+ } else if (0 == aValue.Find(u"axis")) {
+ len = 4; // 4 is the length of 'axis'
+ aAlign = eAlign_axis;
+ }
+ if (len) {
+ nsresult error;
+ aValue.Cut(0, len); // aValue is not a const here
+ aRowIndex = aValue.ToInteger(&error);
+ if (NS_FAILED(error)) aRowIndex = 0;
+ }
+}
+
+#ifdef DEBUG_rbs_off
+// call ListMathMLTree(mParent) to get the big picture
+static void ListMathMLTree(nsIFrame* atLeast) {
+ // climb up to <math> or <body> if <math> isn't there
+ nsIFrame* f = atLeast;
+ for (; f; f = f->GetParent()) {
+ nsIContent* c = f->GetContent();
+ if (!c || c->IsMathMLElement(nsGkAtoms::math) ||
+ // XXXbaku which kind of body tag?
+ c->NodeInfo()->NameAtom(nsGkAtoms::body))
+ break;
+ }
+ if (!f) f = atLeast;
+ f->List(stdout, 0);
+}
+#endif
+
+// --------
+// implementation of nsMathMLmtableWrapperFrame
+
+NS_QUERYFRAME_HEAD(nsMathMLmtableWrapperFrame)
+ NS_QUERYFRAME_ENTRY(nsIMathMLFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsTableWrapperFrame)
+
+nsContainerFrame* NS_NewMathMLmtableOuterFrame(PresShell* aPresShell,
+ ComputedStyle* aStyle) {
+ return new (aPresShell)
+ nsMathMLmtableWrapperFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtableWrapperFrame)
+
+nsMathMLmtableWrapperFrame::~nsMathMLmtableWrapperFrame() = default;
+
+nsresult nsMathMLmtableWrapperFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsAtom* aAttribute,
+ int32_t aModType) {
+ // Attributes specific to <mtable>:
+ // frame : in mathml.css
+ // framespacing : here
+ // groupalign : not yet supported
+ // equalrows : not yet supported
+ // equalcolumns : not yet supported
+ // displaystyle : here and in mathml.css
+ // align : in reflow
+ // rowalign : here
+ // rowlines : here
+ // rowspacing : here
+ // columnalign : here
+ // columnlines : here
+ // columnspacing : here
+
+ // mtable is simple and only has one (pseudo) row-group inside our inner-table
+ nsIFrame* tableFrame = mFrames.FirstChild();
+ NS_ASSERTION(tableFrame && tableFrame->IsTableFrame(),
+ "should always have an inner table frame");
+ nsIFrame* rgFrame = tableFrame->PrincipalChildList().FirstChild();
+ if (!rgFrame || !rgFrame->IsTableRowGroupFrame()) return NS_OK;
+
+ // align - just need to issue a dirty (resize) reflow command
+ if (aAttribute == nsGkAtoms::align) {
+ PresShell()->FrameNeedsReflow(this, IntrinsicDirty::None,
+ NS_FRAME_IS_DIRTY);
+ return NS_OK;
+ }
+
+ // displaystyle - may seem innocuous, but it is actually very harsh --
+ // like changing an unit. Blow away and recompute all our automatic
+ // presentational data, and issue a style-changed reflow request
+ if (aAttribute == nsGkAtoms::displaystyle_) {
+ nsMathMLContainerFrame::RebuildAutomaticDataForChildren(GetParent());
+ // Need to reflow the parent, not us, because this can actually
+ // affect siblings.
+ PresShell()->FrameNeedsReflow(GetParent(),
+ IntrinsicDirty::FrameAncestorsAndDescendants,
+ NS_FRAME_IS_DIRTY);
+ return NS_OK;
+ }
+
+ // ...and the other attributes affect rows or columns in one way or another
+
+ nsPresContext* presContext = tableFrame->PresContext();
+ if (aAttribute == nsGkAtoms::rowspacing_ ||
+ aAttribute == nsGkAtoms::columnspacing_ ||
+ aAttribute == nsGkAtoms::framespacing_) {
+ nsMathMLmtableFrame* mathMLmtableFrame = do_QueryFrame(tableFrame);
+ if (mathMLmtableFrame) {
+ ParseSpacingAttribute(mathMLmtableFrame, aAttribute);
+ mathMLmtableFrame->SetUseCSSSpacing();
+ }
+ } else if (aAttribute == nsGkAtoms::rowalign_ ||
+ aAttribute == nsGkAtoms::rowlines_ ||
+ aAttribute == nsGkAtoms::columnalign_ ||
+ aAttribute == nsGkAtoms::columnlines_) {
+ // clear any cached property list for this table
+ tableFrame->RemoveProperty(AttributeToProperty(aAttribute));
+ // Reparse the new attribute on the table.
+ ParseFrameAttribute(tableFrame, aAttribute, true);
+ } else {
+ // Ignore attributes that do not affect layout.
+ return NS_OK;
+ }
+
+ // Explicitly request a reflow in our subtree to pick up any changes
+ presContext->PresShell()->FrameNeedsReflow(
+ this, IntrinsicDirty::FrameAncestorsAndDescendants, NS_FRAME_IS_DIRTY);
+
+ return NS_OK;
+}
+
+nsIFrame* nsMathMLmtableWrapperFrame::GetRowFrameAt(int32_t aRowIndex) {
+ int32_t rowCount = GetRowCount();
+
+ // Negative indices mean to find upwards from the end.
+ if (aRowIndex < 0) {
+ aRowIndex = rowCount + aRowIndex;
+ } else {
+ // aRowIndex is 1-based, so convert it to a 0-based index
+ --aRowIndex;
+ }
+
+ // if our inner table says that the index is valid, find the row now
+ if (0 <= aRowIndex && aRowIndex <= rowCount) {
+ nsIFrame* tableFrame = mFrames.FirstChild();
+ NS_ASSERTION(tableFrame && tableFrame->IsTableFrame(),
+ "should always have an inner table frame");
+ nsIFrame* rgFrame = tableFrame->PrincipalChildList().FirstChild();
+ if (!rgFrame || !rgFrame->IsTableRowGroupFrame()) return nullptr;
+ for (nsIFrame* rowFrame : rgFrame->PrincipalChildList()) {
+ if (aRowIndex == 0) {
+ DEBUG_VERIFY_THAT_FRAME_IS(rowFrame, TableRow);
+ if (!rowFrame->IsTableRowFrame()) return nullptr;
+
+ return rowFrame;
+ }
+ --aRowIndex;
+ }
+ }
+ return nullptr;
+}
+
+void nsMathMLmtableWrapperFrame::Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) {
+ MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+
+ nsAutoString value;
+ // we want to return a table that is anchored according to the align attribute
+
+ nsTableWrapperFrame::Reflow(aPresContext, aDesiredSize, aReflowInput,
+ aStatus);
+ NS_ASSERTION(aDesiredSize.Height() >= 0, "illegal height for mtable");
+ NS_ASSERTION(aDesiredSize.Width() >= 0, "illegal width for mtable");
+
+ // see if the user has set the align attribute on the <mtable>
+ int32_t rowIndex = 0;
+ eAlign tableAlign = eAlign_axis;
+ mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::align, value);
+ if (!value.IsEmpty()) {
+ ParseAlignAttribute(value, tableAlign, rowIndex);
+ }
+
+ // adjustments if there is a specified row from where to anchor the table
+ // (conceptually: when there is no row of reference, picture the table as if
+ // it is wrapped in a single big fictional row at dy = 0, this way of
+ // doing so allows us to have a single code path for all cases).
+ nscoord dy = 0;
+ WritingMode wm = aDesiredSize.GetWritingMode();
+ nscoord blockSize = aDesiredSize.BSize(wm);
+ nsIFrame* rowFrame = nullptr;
+ if (rowIndex) {
+ rowFrame = GetRowFrameAt(rowIndex);
+ if (rowFrame) {
+ // translate the coordinates to be relative to us and in our writing mode
+ nsIFrame* frame = rowFrame;
+ LogicalRect rect(wm, frame->GetRect(),
+ aReflowInput.ComputedSizeAsContainerIfConstrained());
+ blockSize = rect.BSize(wm);
+ do {
+ nsIFrame* parent = frame->GetParent();
+ dy += frame->BStart(wm, parent->GetSize());
+ frame = parent;
+ } while (frame != this);
+ }
+ }
+ switch (tableAlign) {
+ case eAlign_top:
+ aDesiredSize.SetBlockStartAscent(dy);
+ break;
+ case eAlign_bottom:
+ aDesiredSize.SetBlockStartAscent(dy + blockSize);
+ break;
+ case eAlign_center:
+ aDesiredSize.SetBlockStartAscent(dy + blockSize / 2);
+ break;
+ case eAlign_baseline:
+ if (rowFrame) {
+ // anchor the table on the baseline of the row of reference
+ nscoord rowAscent = ((nsTableRowFrame*)rowFrame)->GetMaxCellAscent();
+ if (rowAscent) { // the row has at least one cell with 'vertical-align:
+ // baseline'
+ aDesiredSize.SetBlockStartAscent(dy + rowAscent);
+ break;
+ }
+ }
+ // in other situations, fallback to center
+ aDesiredSize.SetBlockStartAscent(dy + blockSize / 2);
+ break;
+ case eAlign_axis:
+ default: {
+ // XXX should instead use style data from the row of reference here ?
+ RefPtr<nsFontMetrics> fm =
+ nsLayoutUtils::GetInflatedFontMetricsForFrame(this);
+ nscoord axisHeight;
+ GetAxisHeight(aReflowInput.mRenderingContext->GetDrawTarget(), fm,
+ axisHeight);
+ if (rowFrame) {
+ // anchor the table on the axis of the row of reference
+ // XXX fallback to baseline because it is a hard problem
+ // XXX need to fetch the axis of the row; would need rowalign=axis to
+ // work better
+ nscoord rowAscent = ((nsTableRowFrame*)rowFrame)->GetMaxCellAscent();
+ if (rowAscent) { // the row has at least one cell with 'vertical-align:
+ // baseline'
+ aDesiredSize.SetBlockStartAscent(dy + rowAscent);
+ break;
+ }
+ }
+ // in other situations, fallback to using half of the height
+ aDesiredSize.SetBlockStartAscent(dy + blockSize / 2 + axisHeight);
+ }
+ }
+
+ mReference.x = 0;
+ mReference.y = aDesiredSize.BlockStartAscent();
+
+ // just make-up a bounding metrics
+ mBoundingMetrics = nsBoundingMetrics();
+ mBoundingMetrics.ascent = aDesiredSize.BlockStartAscent();
+ mBoundingMetrics.descent =
+ aDesiredSize.Height() - aDesiredSize.BlockStartAscent();
+ mBoundingMetrics.width = aDesiredSize.Width();
+ mBoundingMetrics.leftBearing = 0;
+ mBoundingMetrics.rightBearing = aDesiredSize.Width();
+
+ aDesiredSize.mBoundingMetrics = mBoundingMetrics;
+}
+
+nsContainerFrame* NS_NewMathMLmtableFrame(PresShell* aPresShell,
+ ComputedStyle* aStyle) {
+ return new (aPresShell)
+ nsMathMLmtableFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtableFrame)
+
+nsMathMLmtableFrame::~nsMathMLmtableFrame() = default;
+
+void nsMathMLmtableFrame::SetInitialChildList(ChildListID aListID,
+ nsFrameList&& aChildList) {
+ nsTableFrame::SetInitialChildList(aListID, std::move(aChildList));
+ MapAllAttributesIntoCSS(this);
+}
+
+void nsMathMLmtableFrame::RestyleTable() {
+ // re-sync MathML specific style data that may have changed
+ MapAllAttributesIntoCSS(this);
+
+ // Explicitly request a re-resolve and reflow in our subtree to pick up any
+ // changes
+ PresContext()->RestyleManager()->PostRestyleEvent(
+ mContent->AsElement(), RestyleHint::RestyleSubtree(),
+ nsChangeHint_AllReflowHints);
+}
+
+nscoord nsMathMLmtableFrame::GetColSpacing(int32_t aColIndex) {
+ if (mUseCSSSpacing) {
+ return nsTableFrame::GetColSpacing(aColIndex);
+ }
+ if (!mColSpacing.Length()) {
+ NS_ERROR("mColSpacing should not be empty");
+ return 0;
+ }
+ if (aColIndex < 0 || aColIndex >= GetColCount()) {
+ NS_ASSERTION(aColIndex == -1 || aColIndex == GetColCount(),
+ "Desired column beyond bounds of table and border");
+ return mFrameSpacingX;
+ }
+ if ((uint32_t)aColIndex >= mColSpacing.Length()) {
+ return mColSpacing.LastElement();
+ }
+ return mColSpacing.ElementAt(aColIndex);
+}
+
+nscoord nsMathMLmtableFrame::GetColSpacing(int32_t aStartColIndex,
+ int32_t aEndColIndex) {
+ if (mUseCSSSpacing) {
+ return nsTableFrame::GetColSpacing(aStartColIndex, aEndColIndex);
+ }
+ if (aStartColIndex == aEndColIndex) {
+ return 0;
+ }
+ if (!mColSpacing.Length()) {
+ NS_ERROR("mColSpacing should not be empty");
+ return 0;
+ }
+ nscoord space = 0;
+ if (aStartColIndex < 0) {
+ NS_ASSERTION(aStartColIndex == -1,
+ "Desired column beyond bounds of table and border");
+ space += mFrameSpacingX;
+ aStartColIndex = 0;
+ }
+ if (aEndColIndex >= GetColCount()) {
+ NS_ASSERTION(aEndColIndex == GetColCount(),
+ "Desired column beyond bounds of table and border");
+ space += mFrameSpacingX;
+ aEndColIndex = GetColCount();
+ }
+ // Only iterate over column spacing when there is the potential to vary
+ int32_t min = std::min(aEndColIndex, (int32_t)mColSpacing.Length());
+ for (int32_t i = aStartColIndex; i < min; i++) {
+ space += mColSpacing.ElementAt(i);
+ }
+ // The remaining values are constant. Note that if there are more
+ // column spacings specified than there are columns, LastElement() will be
+ // multiplied by 0, so it is still safe to use.
+ space += (aEndColIndex - min) * mColSpacing.LastElement();
+ return space;
+}
+
+nscoord nsMathMLmtableFrame::GetRowSpacing(int32_t aRowIndex) {
+ if (mUseCSSSpacing) {
+ return nsTableFrame::GetRowSpacing(aRowIndex);
+ }
+ if (!mRowSpacing.Length()) {
+ NS_ERROR("mRowSpacing should not be empty");
+ return 0;
+ }
+ if (aRowIndex < 0 || aRowIndex >= GetRowCount()) {
+ NS_ASSERTION(aRowIndex == -1 || aRowIndex == GetRowCount(),
+ "Desired row beyond bounds of table and border");
+ return mFrameSpacingY;
+ }
+ if ((uint32_t)aRowIndex >= mRowSpacing.Length()) {
+ return mRowSpacing.LastElement();
+ }
+ return mRowSpacing.ElementAt(aRowIndex);
+}
+
+nscoord nsMathMLmtableFrame::GetRowSpacing(int32_t aStartRowIndex,
+ int32_t aEndRowIndex) {
+ if (mUseCSSSpacing) {
+ return nsTableFrame::GetRowSpacing(aStartRowIndex, aEndRowIndex);
+ }
+ if (aStartRowIndex == aEndRowIndex) {
+ return 0;
+ }
+ if (!mRowSpacing.Length()) {
+ NS_ERROR("mRowSpacing should not be empty");
+ return 0;
+ }
+ nscoord space = 0;
+ if (aStartRowIndex < 0) {
+ NS_ASSERTION(aStartRowIndex == -1,
+ "Desired row beyond bounds of table and border");
+ space += mFrameSpacingY;
+ aStartRowIndex = 0;
+ }
+ if (aEndRowIndex >= GetRowCount()) {
+ NS_ASSERTION(aEndRowIndex == GetRowCount(),
+ "Desired row beyond bounds of table and border");
+ space += mFrameSpacingY;
+ aEndRowIndex = GetRowCount();
+ }
+ // Only iterate over row spacing when there is the potential to vary
+ int32_t min = std::min(aEndRowIndex, (int32_t)mRowSpacing.Length());
+ for (int32_t i = aStartRowIndex; i < min; i++) {
+ space += mRowSpacing.ElementAt(i);
+ }
+ // The remaining values are constant. Note that if there are more
+ // row spacings specified than there are row, LastElement() will be
+ // multiplied by 0, so it is still safe to use.
+ space += (aEndRowIndex - min) * mRowSpacing.LastElement();
+ return space;
+}
+
+void nsMathMLmtableFrame::SetUseCSSSpacing() {
+ mUseCSSSpacing = !(mContent->AsElement()->HasAttr(kNameSpaceID_None,
+ nsGkAtoms::rowspacing_) ||
+ mContent->AsElement()->HasAttr(
+ kNameSpaceID_None, nsGkAtoms::columnspacing_) ||
+ mContent->AsElement()->HasAttr(kNameSpaceID_None,
+ nsGkAtoms::framespacing_));
+}
+
+NS_QUERYFRAME_HEAD(nsMathMLmtableFrame)
+ NS_QUERYFRAME_ENTRY(nsMathMLmtableFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsTableFrame)
+
+// --------
+// implementation of nsMathMLmtrFrame
+
+nsContainerFrame* NS_NewMathMLmtrFrame(PresShell* aPresShell,
+ ComputedStyle* aStyle) {
+ return new (aPresShell)
+ nsMathMLmtrFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtrFrame)
+
+nsMathMLmtrFrame::~nsMathMLmtrFrame() = default;
+
+nsresult nsMathMLmtrFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsAtom* aAttribute,
+ int32_t aModType) {
+ // Attributes specific to <mtr>:
+ // groupalign : Not yet supported.
+ // rowalign : Here
+ // columnalign : Here
+
+ nsPresContext* presContext = PresContext();
+
+ if (aAttribute != nsGkAtoms::rowalign_ &&
+ aAttribute != nsGkAtoms::columnalign_) {
+ return NS_OK;
+ }
+
+ RemoveProperty(AttributeToProperty(aAttribute));
+
+ bool allowMultiValues = (aAttribute == nsGkAtoms::columnalign_);
+
+ // Reparse the new attribute.
+ ParseFrameAttribute(this, aAttribute, allowMultiValues);
+
+ // Explicitly request a reflow in our subtree to pick up any changes
+ presContext->PresShell()->FrameNeedsReflow(
+ this, IntrinsicDirty::FrameAncestorsAndDescendants, NS_FRAME_IS_DIRTY);
+
+ return NS_OK;
+}
+
+// --------
+// implementation of nsMathMLmtdFrame
+
+nsContainerFrame* NS_NewMathMLmtdFrame(PresShell* aPresShell,
+ ComputedStyle* aStyle,
+ nsTableFrame* aTableFrame) {
+ return new (aPresShell) nsMathMLmtdFrame(aStyle, aTableFrame);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtdFrame)
+
+nsMathMLmtdFrame::~nsMathMLmtdFrame() = default;
+
+void nsMathMLmtdFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) {
+ nsTableCellFrame::Init(aContent, aParent, aPrevInFlow);
+
+ // We want to use the ancestor <math> element's font inflation to avoid
+ // individual cells having their own varying font inflation.
+ RemoveStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
+}
+
+nsresult nsMathMLmtdFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsAtom* aAttribute,
+ int32_t aModType) {
+ // Attributes specific to <mtd>:
+ // groupalign : Not yet supported
+ // rowalign : here
+ // columnalign : here
+ // rowspan : here
+ // columnspan : here
+
+ if (aAttribute == nsGkAtoms::rowalign_ ||
+ aAttribute == nsGkAtoms::columnalign_) {
+ RemoveProperty(AttributeToProperty(aAttribute));
+
+ // Reparse the attribute.
+ ParseFrameAttribute(this, aAttribute, false);
+ return NS_OK;
+ }
+
+ if (aAttribute == nsGkAtoms::rowspan ||
+ aAttribute == nsGkAtoms::columnspan_) {
+ // use the naming expected by the base class
+ if (aAttribute == nsGkAtoms::columnspan_) aAttribute = nsGkAtoms::colspan;
+ return nsTableCellFrame::AttributeChanged(aNameSpaceID, aAttribute,
+ aModType);
+ }
+
+ return NS_OK;
+}
+
+StyleVerticalAlignKeyword nsMathMLmtdFrame::GetVerticalAlign() const {
+ // Set the default alignment in case no alignment was specified
+ auto alignment = nsTableCellFrame::GetVerticalAlign();
+
+ nsTArray<int8_t>* alignmentList = FindCellProperty(this, RowAlignProperty());
+
+ if (alignmentList) {
+ uint32_t rowIndex = RowIndex();
+
+ // If the row number is greater than the number of provided rowalign values,
+ // we simply repeat the last value.
+ return static_cast<StyleVerticalAlignKeyword>(
+ (rowIndex < alignmentList->Length())
+ ? alignmentList->ElementAt(rowIndex)
+ : alignmentList->LastElement());
+ }
+
+ return alignment;
+}
+
+nsresult nsMathMLmtdFrame::ProcessBorders(nsTableFrame* aFrame,
+ nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists) {
+ aLists.BorderBackground()->AppendNewToTop<nsDisplaymtdBorder>(aBuilder, this);
+ return NS_OK;
+}
+
+LogicalMargin nsMathMLmtdFrame::GetBorderWidth(WritingMode aWM) const {
+ nsStyleBorder styleBorder = *StyleBorder();
+ ApplyBorderToStyle(this, styleBorder);
+ return LogicalMargin(aWM, styleBorder.GetComputedBorder());
+}
+
+nsMargin nsMathMLmtdFrame::GetBorderOverflow() {
+ nsStyleBorder styleBorder = *StyleBorder();
+ ApplyBorderToStyle(this, styleBorder);
+ nsMargin overflow = ComputeBorderOverflow(this, styleBorder);
+ return overflow;
+}
+
+// --------
+// implementation of nsMathMLmtdInnerFrame
+
+NS_QUERYFRAME_HEAD(nsMathMLmtdInnerFrame)
+ NS_QUERYFRAME_ENTRY(nsIMathMLFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
+
+nsContainerFrame* NS_NewMathMLmtdInnerFrame(PresShell* aPresShell,
+ ComputedStyle* aStyle) {
+ return new (aPresShell)
+ nsMathMLmtdInnerFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtdInnerFrame)
+
+nsMathMLmtdInnerFrame::nsMathMLmtdInnerFrame(ComputedStyle* aStyle,
+ nsPresContext* aPresContext)
+ : nsBlockFrame(aStyle, aPresContext, kClassID)
+ // Make a copy of the parent nsStyleText for later modification.
+ ,
+ mUniqueStyleText(MakeUnique<nsStyleText>(*StyleText())) {}
+
+void nsMathMLmtdInnerFrame::Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) {
+ // Let the base class do the reflow
+ nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowInput, aStatus);
+
+ // more about <maligngroup/> and <malignmark/> later
+ // ...
+}
+
+const nsStyleText* nsMathMLmtdInnerFrame::StyleTextForLineLayout() {
+ // Set the default alignment in case nothing was specified
+ auto alignment = uint8_t(StyleText()->mTextAlign);
+
+ nsTArray<int8_t>* alignmentList =
+ FindCellProperty(this, ColumnAlignProperty());
+
+ if (alignmentList) {
+ nsMathMLmtdFrame* cellFrame = (nsMathMLmtdFrame*)GetParent();
+ uint32_t columnIndex = cellFrame->ColIndex();
+
+ // If the column number is greater than the number of provided columalign
+ // values, we simply repeat the last value.
+ if (columnIndex < alignmentList->Length())
+ alignment = alignmentList->ElementAt(columnIndex);
+ else
+ alignment = alignmentList->ElementAt(alignmentList->Length() - 1);
+ }
+
+ mUniqueStyleText->mTextAlign = StyleTextAlign(alignment);
+ return mUniqueStyleText.get();
+}
+
+/* virtual */
+void nsMathMLmtdInnerFrame::DidSetComputedStyle(
+ ComputedStyle* aOldComputedStyle) {
+ nsBlockFrame::DidSetComputedStyle(aOldComputedStyle);
+ mUniqueStyleText = MakeUnique<nsStyleText>(*StyleText());
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-19 06:01:48 +0000