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gecko-dev/layout/mathml/nsMathMLmtableFrame.cpp

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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 "nsMathMLmtableFrame.h"
#include "nsPresContext.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsINameSpaceManager.h"
#include "nsRenderingContext.h"
#include "nsCSSRendering.h"
#include "nsTArray.h"
#include "nsTableFrame.h"
#include "celldata.h"
#include "RestyleManager.h"
#include <algorithm>
#include "nsIScriptError.h"
#include "nsContentUtils.h"
using namespace mozilla;
//
// <mtable> -- table or matrix - implementation
//
static int8_t
ParseStyleValue(nsIAtom* aAttribute, const nsAString& aAttributeValue)
{
if (aAttribute == nsGkAtoms::rowalign_) {
if (aAttributeValue.EqualsLiteral("top"))
return NS_STYLE_VERTICAL_ALIGN_TOP;
else if (aAttributeValue.EqualsLiteral("bottom"))
return NS_STYLE_VERTICAL_ALIGN_BOTTOM;
else if (aAttributeValue.EqualsLiteral("center"))
return NS_STYLE_VERTICAL_ALIGN_MIDDLE;
else
return NS_STYLE_VERTICAL_ALIGN_BASELINE;
} else if (aAttribute == nsGkAtoms::columnalign_) {
if (aAttributeValue.EqualsLiteral("left"))
return NS_STYLE_TEXT_ALIGN_LEFT;
else if (aAttributeValue.EqualsLiteral("right"))
return NS_STYLE_TEXT_ALIGN_RIGHT;
else
return NS_STYLE_TEXT_ALIGN_CENTER;
} else if (aAttribute == nsGkAtoms::rowlines_ ||
aAttribute == nsGkAtoms::columnlines_) {
if (aAttributeValue.EqualsLiteral("solid"))
return NS_STYLE_BORDER_STYLE_SOLID;
else if (aAttributeValue.EqualsLiteral("dashed"))
return NS_STYLE_BORDER_STYLE_DASHED;
else
return NS_STYLE_BORDER_STYLE_NONE;
} else {
MOZ_CRASH("Unrecognized attribute.");
}
return -1;
}
static nsTArray<int8_t>*
ExtractStyleValues(const nsAString& aString, nsIAtom* 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();
const char16_t* params[] =
{ aValue, aAttribute, content->Tag()->GetUTF16String() };
return nsContentUtils::ReportToConsole(nsIScriptError::errorFlag,
NS_LITERAL_CSTRING("MathML"),
content->OwnerDoc(),
nsContentUtils::eMATHML_PROPERTIES,
"AttributeParsingError", params, 3);
}
// 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.
static void
DestroyStylePropertyList(void* aPropertyValue)
{
delete static_cast<nsTArray<int8_t>*>(aPropertyValue);
}
NS_DECLARE_FRAME_PROPERTY(RowAlignProperty, DestroyStylePropertyList)
NS_DECLARE_FRAME_PROPERTY(RowLinesProperty, DestroyStylePropertyList)
NS_DECLARE_FRAME_PROPERTY(ColumnAlignProperty, DestroyStylePropertyList)
NS_DECLARE_FRAME_PROPERTY(ColumnLinesProperty, DestroyStylePropertyList)
static const FramePropertyDescriptor*
AttributeToProperty(nsIAtom* 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 heirarchy 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* aFrameProperty)
{
const nsIFrame* currentFrame = aCellFrame;
nsTArray<int8_t>* propertyData = nullptr;
while (currentFrame) {
FrameProperties props = currentFrame->Properties();
propertyData = static_cast<nsTArray<int8_t>*>(props.Get(aFrameProperty));
bool frameIsTable = (currentFrame->GetType() == nsGkAtoms::tableFrame);
if (propertyData || frameIsTable)
currentFrame = nullptr; // A null frame pointer exits the loop
else
currentFrame = currentFrame->GetParent(); // Go to the parent frame
}
return propertyData;
}
/*
* 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 : public nsDisplayBorder {
public:
nsDisplaymtdBorder(nsDisplayListBuilder* aBuilder, nsMathMLmtdFrame* aFrame)
: nsDisplayBorder(aBuilder, aFrame)
{
}
virtual void Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) MOZ_OVERRIDE
{
int32_t rowIndex;
int32_t columnIndex;
static_cast<nsTableCellFrame*>(mFrame)->
GetCellIndexes(rowIndex, columnIndex);
nsStyleBorder styleBorder = *mFrame->StyleBorder();
nscoord borderWidth =
mFrame->PresContext()->GetBorderWidthTable()[NS_STYLE_BORDER_WIDTH_THIN];
nsTArray<int8_t>* rowLinesList =
FindCellProperty(mFrame, RowLinesProperty());
nsTArray<int8_t>* columnLinesList =
FindCellProperty(mFrame, ColumnLinesProperty());
// 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.
int32_t listLength = rowLinesList->Length();
if (rowIndex < listLength) {
styleBorder.SetBorderStyle(NS_SIDE_TOP,
rowLinesList->ElementAt(rowIndex - 1));
} else {
styleBorder.SetBorderStyle(NS_SIDE_TOP,
rowLinesList->ElementAt(listLength - 1));
}
styleBorder.SetBorderWidth(NS_SIDE_TOP, borderWidth);
}
// 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.
int32_t listLength = columnLinesList->Length();
if (columnIndex < listLength) {
styleBorder.SetBorderStyle(NS_SIDE_LEFT,
columnLinesList->ElementAt(columnIndex - 1));
} else {
styleBorder.SetBorderStyle(NS_SIDE_LEFT,
columnLinesList->ElementAt(listLength - 1));
}
styleBorder.SetBorderWidth(NS_SIDE_LEFT, borderWidth);
}
nsPoint offset = ToReferenceFrame();
nsCSSRendering::PaintBorderWithStyleBorder(mFrame->PresContext(), *aCtx,
mFrame, mVisibleRect,
nsRect(offset,
mFrame->GetSize()),
styleBorder,
mFrame->StyleContext(),
mFrame->GetSkipSides());
}
};
#ifdef DEBUG
#define DEBUG_VERIFY_THAT_FRAME_IS(_frame, _expected) \
NS_ASSERTION(NS_STYLE_DISPLAY_##_expected == _frame->StyleDisplay()->mDisplay, "internal error");
#else
#define DEBUG_VERIFY_THAT_FRAME_IS(_frame, _expected)
#endif
static void
ParseFrameAttribute(nsIFrame* aFrame, nsIAtom* aAttribute,
bool aAllowMultiValues)
{
nsAutoString attrValue;
nsIContent* frameContent = aFrame->GetContent();
frameContent->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!");
FrameProperties props = aFrame->Properties();
props.Set(AttributeToProperty(aAttribute), valueList);
} else {
ReportParseError(aFrame, aAttribute->GetUTF16String(), attrValue.get());
}
}
}
// map all attribues 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(nsIFrame* 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);
// mtable is simple and only has one (pseudo) row-group
nsIFrame* rgFrame = aTableFrame->GetFirstPrincipalChild();
if (!rgFrame || rgFrame->GetType() != nsGkAtoms::tableRowGroupFrame)
return;
nsIFrame* rowFrame = rgFrame->GetFirstPrincipalChild();
for ( ; rowFrame; rowFrame = rowFrame->GetNextSibling()) {
DEBUG_VERIFY_THAT_FRAME_IS(rowFrame, TABLE_ROW);
if (rowFrame->GetType() == nsGkAtoms::tableRowFrame) {
// Map row rowalign.
ParseFrameAttribute(rowFrame, nsGkAtoms::rowalign_, false);
// Map row columnalign.
ParseFrameAttribute(rowFrame, nsGkAtoms::columnalign_, true);
nsIFrame* cellFrame = rowFrame->GetFirstPrincipalChild();
for ( ; cellFrame; cellFrame = cellFrame->GetNextSibling()) {
DEBUG_VERIFY_THAT_FRAME_IS(cellFrame, TABLE_CELL);
if (IS_TABLE_CELL(cellFrame->GetType())) {
// 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("top")) {
len = 3; // 3 is the length of 'top'
aAlign = eAlign_top;
}
else if (0 == aValue.Find("bottom")) {
len = 6; // 6 is the length of 'bottom'
aAlign = eAlign_bottom;
}
else if (0 == aValue.Find("center")) {
len = 6; // 6 is the length of 'center'
aAlign = eAlign_center;
}
else if (0 == aValue.Find("baseline")) {
len = 8; // 8 is the length of 'baseline'
aAlign = eAlign_baseline;
}
else if (0 == aValue.Find("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->Tag() == nsGkAtoms::math || c->Tag() == nsGkAtoms::body)
break;
}
if (!f) f = atLeast;
f->List(stdout, 0);
}
#endif
// --------
// implementation of nsMathMLmtableOuterFrame
NS_QUERYFRAME_HEAD(nsMathMLmtableOuterFrame)
NS_QUERYFRAME_ENTRY(nsIMathMLFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsTableOuterFrame)
nsIFrame*
NS_NewMathMLmtableOuterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsMathMLmtableOuterFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtableOuterFrame)
nsMathMLmtableOuterFrame::~nsMathMLmtableOuterFrame()
{
}
NS_IMETHODIMP
nsMathMLmtableOuterFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
// Attributes specific to <mtable>:
// frame : in mathml.css
// framespacing : not yet supported
// 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 : not yet supported
// columnalign : here
// columnlines : here
// columnspacing : not yet supported
// mtable is simple and only has one (pseudo) row-group inside our inner-table
nsIFrame* tableFrame = mFrames.FirstChild();
NS_ASSERTION(tableFrame && tableFrame->GetType() == nsGkAtoms::tableFrame,
"should always have an inner table frame");
nsIFrame* rgFrame = tableFrame->GetFirstPrincipalChild();
if (!rgFrame || rgFrame->GetType() != nsGkAtoms::tableRowGroupFrame)
return NS_OK;
// align - just need to issue a dirty (resize) reflow command
if (aAttribute == nsGkAtoms::align) {
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eResize, 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(mParent);
// Need to reflow the parent, not us, because this can actually
// affect siblings.
PresContext()->PresShell()->
FrameNeedsReflow(mParent, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY);
return NS_OK;
}
// ...and the other attributes affect rows or columns in one way or another
// Ignore attributes that do not affect layout.
if (aAttribute != nsGkAtoms::rowalign_ &&
aAttribute != nsGkAtoms::rowlines_ &&
aAttribute != nsGkAtoms::columnalign_ &&
aAttribute != nsGkAtoms::columnlines_) {
return NS_OK;
}
nsPresContext* presContext = tableFrame->PresContext();
// clear any cached property list for this table
presContext->PropertyTable()->
Delete(tableFrame, AttributeToProperty(aAttribute));
// Reparse the new attribute on the table.
ParseFrameAttribute(tableFrame, aAttribute, true);
// Explicitly request a reflow in our subtree to pick up any changes
presContext->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY);
return NS_OK;
}
nsIFrame*
nsMathMLmtableOuterFrame::GetRowFrameAt(nsPresContext* aPresContext,
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->GetType() == nsGkAtoms::tableFrame,
"should always have an inner table frame");
nsIFrame* rgFrame = tableFrame->GetFirstPrincipalChild();
if (!rgFrame || rgFrame->GetType() != nsGkAtoms::tableRowGroupFrame)
return nullptr;
nsTableIterator rowIter(*rgFrame);
nsIFrame* rowFrame = rowIter.First();
for ( ; rowFrame; rowFrame = rowIter.Next()) {
if (aRowIndex == 0) {
DEBUG_VERIFY_THAT_FRAME_IS(rowFrame, TABLE_ROW);
if (rowFrame->GetType() != nsGkAtoms::tableRowFrame)
return nullptr;
return rowFrame;
}
--aRowIndex;
}
}
return nullptr;
}
NS_IMETHODIMP
nsMathMLmtableOuterFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv;
nsAutoString value;
// we want to return a table that is anchored according to the align attribute
rv = nsTableOuterFrame::Reflow(aPresContext, aDesiredSize, aReflowState,
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->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;
nscoord height = aDesiredSize.Height();
nsIFrame* rowFrame = nullptr;
if (rowIndex) {
rowFrame = GetRowFrameAt(aPresContext, rowIndex);
if (rowFrame) {
// translate the coordinates to be relative to us
nsIFrame* frame = rowFrame;
height = frame->GetSize().height;
do {
dy += frame->GetPosition().y;
frame = frame->GetParent();
} while (frame != this);
}
}
switch (tableAlign) {
case eAlign_top:
aDesiredSize.SetTopAscent(dy);
break;
case eAlign_bottom:
aDesiredSize.SetTopAscent(dy + height);
break;
case eAlign_center:
aDesiredSize.SetTopAscent(dy + height / 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.SetTopAscent(dy + rowAscent);
break;
}
}
// in other situations, fallback to center
aDesiredSize.SetTopAscent(dy + height / 2);
break;
case eAlign_axis:
default: {
// XXX should instead use style data from the row of reference here ?
nsRefPtr<nsFontMetrics> fm;
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm));
aReflowState.rendContext->SetFont(fm);
nscoord axisHeight;
GetAxisHeight(*aReflowState.rendContext,
aReflowState.rendContext->FontMetrics(),
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.SetTopAscent(dy + rowAscent);
break;
}
}
// in other situations, fallback to using half of the height
aDesiredSize.SetTopAscent(dy + height / 2 + axisHeight);
}
}
mReference.x = 0;
mReference.y = aDesiredSize.TopAscent();
// just make-up a bounding metrics
mBoundingMetrics = nsBoundingMetrics();
mBoundingMetrics.ascent = aDesiredSize.TopAscent();
mBoundingMetrics.descent = aDesiredSize.Height() - aDesiredSize.TopAscent();
mBoundingMetrics.width = aDesiredSize.Width();
mBoundingMetrics.leftBearing = 0;
mBoundingMetrics.rightBearing = aDesiredSize.Width();
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return rv;
}
nsIFrame*
NS_NewMathMLmtableFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsMathMLmtableFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtableFrame)
nsMathMLmtableFrame::~nsMathMLmtableFrame()
{
}
NS_IMETHODIMP
nsMathMLmtableFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList)
{
nsresult rv = nsTableFrame::SetInitialChildList(aListID, aChildList);
if (NS_FAILED(rv)) return rv;
MapAllAttributesIntoCSS(this);
return rv;
}
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(), eRestyle_Subtree,
nsChangeHint_AllReflowHints);
}
// --------
// implementation of nsMathMLmtrFrame
nsIFrame*
NS_NewMathMLmtrFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsMathMLmtrFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtrFrame)
nsMathMLmtrFrame::~nsMathMLmtrFrame()
{
}
NS_IMETHODIMP
nsMathMLmtrFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* 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;
}
presContext->PropertyTable()->Delete(this, 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, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY);
return NS_OK;
}
// --------
// implementation of nsMathMLmtdFrame
nsIFrame*
NS_NewMathMLmtdFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsMathMLmtdFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtdFrame)
nsMathMLmtdFrame::~nsMathMLmtdFrame()
{
}
int32_t
nsMathMLmtdFrame::GetRowSpan()
{
int32_t rowspan = 1;
// Don't look at the content's rowspan if we're not an mtd or a pseudo cell.
if ((mContent->Tag() == nsGkAtoms::mtd_) && !StyleContext()->GetPseudo()) {
nsAutoString value;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::rowspan, value);
if (!value.IsEmpty()) {
nsresult error;
rowspan = value.ToInteger(&error);
if (NS_FAILED(error) || rowspan < 0)
rowspan = 1;
rowspan = std::min(rowspan, MAX_ROWSPAN);
}
}
return rowspan;
}
int32_t
nsMathMLmtdFrame::GetColSpan()
{
int32_t colspan = 1;
// Don't look at the content's colspan if we're not an mtd or a pseudo cell.
if ((mContent->Tag() == nsGkAtoms::mtd_) && !StyleContext()->GetPseudo()) {
nsAutoString value;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::columnspan_, value);
if (!value.IsEmpty()) {
nsresult error;
colspan = value.ToInteger(&error);
if (NS_FAILED(error) || colspan < 0 || colspan > MAX_COLSPAN)
colspan = 1;
}
}
return colspan;
}
NS_IMETHODIMP
nsMathMLmtdFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* 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_) {
nsPresContext* presContext = PresContext();
presContext->PropertyTable()->Delete(this, 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;
}
uint8_t
nsMathMLmtdFrame::GetVerticalAlign() const
{
// Set the default alignment in case no alignment was specified
uint8_t alignment = nsTableCellFrame::GetVerticalAlign();
nsTArray<int8_t>* alignmentList = FindCellProperty(this, RowAlignProperty());
if (alignmentList) {
int32_t rowIndex;
GetRowIndex(rowIndex);
// If the row number is greater than the number of provided rowalign values,
// we simply repeat the last value.
if (rowIndex < (int32_t)alignmentList->Length())
alignment = alignmentList->ElementAt(rowIndex);
else
alignment = alignmentList->ElementAt(alignmentList->Length() - 1);
}
return alignment;
}
nsresult
nsMathMLmtdFrame::ProcessBorders(nsTableFrame* aFrame,
nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists)
{
aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplaymtdBorder(aBuilder, this));
return NS_OK;
}
// --------
// implementation of nsMathMLmtdInnerFrame
NS_QUERYFRAME_HEAD(nsMathMLmtdInnerFrame)
NS_QUERYFRAME_ENTRY(nsIMathMLFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
nsIFrame*
NS_NewMathMLmtdInnerFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsMathMLmtdInnerFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmtdInnerFrame)
nsMathMLmtdInnerFrame::nsMathMLmtdInnerFrame(nsStyleContext* aContext)
: nsBlockFrame(aContext)
{
// Make a copy of the parent nsStyleText for later modificaiton.
mUniqueStyleText = new (PresContext()) nsStyleText(*StyleText());
}
nsMathMLmtdInnerFrame::~nsMathMLmtdInnerFrame()
{
mUniqueStyleText->Destroy(PresContext());
}
NS_IMETHODIMP
nsMathMLmtdInnerFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// Let the base class do the reflow
nsresult rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
// more about <maligngroup/> and <malignmark/> later
// ...
return rv;
}
const
nsStyleText* nsMathMLmtdInnerFrame::StyleTextForLineLayout()
{
// Set the default alignment in case nothing was specified
uint8_t alignment = StyleText()->mTextAlign;
nsTArray<int8_t>* alignmentList =
FindCellProperty(this, ColumnAlignProperty());
if (alignmentList) {
nsMathMLmtdFrame* cellFrame = (nsMathMLmtdFrame*)GetParent();
int32_t columnIndex;
cellFrame->GetColIndex(columnIndex);
// If the column number is greater than the number of provided columalign
// values, we simply repeat the last value.
if (columnIndex < (int32_t)alignmentList->Length())
alignment = alignmentList->ElementAt(columnIndex);
else
alignment = alignmentList->ElementAt(alignmentList->Length() - 1);
}
mUniqueStyleText->mTextAlign = alignment;
return mUniqueStyleText;
}
/* virtual */ void
nsMathMLmtdInnerFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
{
nsBlockFrame::DidSetStyleContext(aOldStyleContext);
mUniqueStyleText->Destroy(PresContext());
mUniqueStyleText = new (PresContext()) nsStyleText(*StyleText());
}
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