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0354744354
gecko/layout/mathml/nsMathMLmtableFrame.cpp
L. David Baron 0354744354 Bug 896138 patch 4: Move restyle management code from nsCSSFrameConstructor to RestyleManager. r=heycam 
This moves restyling management out of nsCSSFrameConstructor (thus
reducing its size), and keeps the restyling code closer together.

This is the first of two big chunks of code moved in this patch series.
A later patch in this series will move related code from nsFrameManager
into the same destination file.
2013-07-20 12:14:25 -07:00

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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 "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsBlockFrame.h"
#include "nsPresContext.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsTableRowFrame.h"
#include "nsINameSpaceManager.h"
#include "nsRenderingContext.h"
#include "nsTArray.h"
#include "nsCSSFrameConstructor.h"
#include "nsTableOuterFrame.h"
#include "nsTableFrame.h"
#include "nsTableCellFrame.h"
#include "celldata.h"
#include "nsMathMLmtableFrame.h"
#include <algorithm>
using namespace mozilla;
//
// <mtable> -- table or matrix - implementation
//
// helper function to perform an in-place split of a space-delimited string,
// and return an array of pointers for the beginning of each segment, i.e.,
// aOffset[0] is the first string, aOffset[1] is the second string, etc.
// Used to parse attributes like columnalign='left right', rowalign='top bottom'
static void
SplitString(nsString& aString, // [IN/OUT]
nsTArray<PRUnichar*>& aOffset) // [OUT]
{
static const PRUnichar kNullCh = PRUnichar('\0');
aString.Append(kNullCh); // put an extra null at the end
PRUnichar* start = aString.BeginWriting();
PRUnichar* end = start;
while (kNullCh != *start) {
while ((kNullCh != *start) && nsCRT::IsAsciiSpace(*start)) { // skip leading space
start++;
}
end = start;
while ((kNullCh != *end) && (false == nsCRT::IsAsciiSpace(*end))) { // look for space or end
end++;
}
*end = kNullCh; // end string here
if (start < end) {
aOffset.AppendElement(start); // record the beginning of this segment
}
start = ++end;
}
}
struct nsValueList
{
nsString mData;
nsTArray<PRUnichar*> mArray;
nsValueList(nsString& aData) {
mData.Assign(aData);
SplitString(mData, mArray);
}
};
// Each rowalign='top bottom' or columnalign='left right center' (from
// <mtable> or <mtr>) is split once (lazily) into a nsValueList which is
// stored in the property table. Row/Cell frames query the property table
// to see what values apply to them.
// XXX See bug 69409 - MathML attributes are not mapped to style.
static void
DestroyValueList(void* aPropertyValue)
{
delete static_cast<nsValueList*>(aPropertyValue);
}
NS_DECLARE_FRAME_PROPERTY(RowAlignProperty, DestroyValueList)
NS_DECLARE_FRAME_PROPERTY(RowLinesProperty, DestroyValueList)
NS_DECLARE_FRAME_PROPERTY(ColumnAlignProperty, DestroyValueList)
NS_DECLARE_FRAME_PROPERTY(ColumnLinesProperty, DestroyValueList)
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();
}
static PRUnichar*
GetValueAt(nsIFrame* aTableOrRowFrame,
const FramePropertyDescriptor* aProperty,
nsIAtom* aAttribute,
int32_t aRowOrColIndex)
{
FrameProperties props = aTableOrRowFrame->Properties();
nsValueList* valueList = static_cast<nsValueList*>(props.Get(aProperty));
if (!valueList) {
// The property isn't there yet, so set it
nsAutoString values;
aTableOrRowFrame->GetContent()->GetAttr(kNameSpaceID_None, aAttribute, values);
if (!values.IsEmpty())
valueList = new nsValueList(values);
if (!valueList || !valueList->mArray.Length()) {
delete valueList; // ok either way, delete is null safe
return nullptr;
}
props.Set(aProperty, valueList);
}
int32_t count = valueList->mArray.Length();
return (aRowOrColIndex < count)
? valueList->mArray[aRowOrColIndex]
: valueList->mArray[count-1];
}
#ifdef DEBUG
static bool
IsTable(uint8_t aDisplay)
{
if ((aDisplay == NS_STYLE_DISPLAY_TABLE) ||
(aDisplay == NS_STYLE_DISPLAY_INLINE_TABLE))
return true;
return false;
}
#define DEBUG_VERIFY_THAT_FRAME_IS(_frame, _expected) \
NS_ASSERTION(NS_STYLE_DISPLAY_##_expected == _frame->StyleDisplay()->mDisplay, "internal error");
#define DEBUG_VERIFY_THAT_FRAME_IS_TABLE(_frame) \
NS_ASSERTION(IsTable(_frame->StyleDisplay()->mDisplay), "internal error");
#else
#define DEBUG_VERIFY_THAT_FRAME_IS(_frame, _expected)
#define DEBUG_VERIFY_THAT_FRAME_IS_TABLE(_frame)
#endif
// map attributes that depend on the index of the row:
// rowalign, rowlines, XXX need rowspacing too
static void
MapRowAttributesIntoCSS(nsIFrame* aTableFrame,
nsIFrame* aRowFrame)
{
DEBUG_VERIFY_THAT_FRAME_IS_TABLE(aTableFrame);
DEBUG_VERIFY_THAT_FRAME_IS(aRowFrame, TABLE_ROW);
int32_t rowIndex = ((nsTableRowFrame*)aRowFrame)->GetRowIndex();
nsIContent* rowContent = aRowFrame->GetContent();
PRUnichar* attr;
// see if the rowalign attribute is not already set
if (!rowContent->HasAttr(kNameSpaceID_None, nsGkAtoms::rowalign_) &&
!rowContent->HasAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_rowalign_)) {
// see if the rowalign attribute was specified on the table
attr = GetValueAt(aTableFrame, RowAlignProperty(),
nsGkAtoms::rowalign_, rowIndex);
if (attr) {
// set our special _moz attribute on the row without notifying a reflow
rowContent->SetAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_rowalign_,
nsDependentString(attr), false);
}
}
// if we are not on the first row, see if |rowlines| was specified on the table.
// Note that we pass 'rowIndex-1' because the CSS rule in mathml.css is associated
// to 'border-top', and it is as if we draw the line on behalf of the previous cell.
// This way of doing so allows us to handle selective lines, [row]\hline[row][row]',
// and cases of spanning cells without further complications.
if (rowIndex > 0 &&
!rowContent->HasAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_rowline_)) {
attr = GetValueAt(aTableFrame, RowLinesProperty(),
nsGkAtoms::rowlines_, rowIndex-1);
if (attr) {
// set our special _moz attribute on the row without notifying a reflow
rowContent->SetAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_rowline_,
nsDependentString(attr), false);
}
}
}
// map attributes that depend on the index of the column:
// columnalign, columnlines, XXX need columnwidth and columnspacing too
static void
MapColAttributesIntoCSS(nsIFrame* aTableFrame,
nsIFrame* aRowFrame,
nsIFrame* aCellFrame)
{
DEBUG_VERIFY_THAT_FRAME_IS_TABLE(aTableFrame);
DEBUG_VERIFY_THAT_FRAME_IS(aRowFrame, TABLE_ROW);
DEBUG_VERIFY_THAT_FRAME_IS(aCellFrame, TABLE_CELL);
int32_t rowIndex, colIndex;
((nsTableCellFrame*)aCellFrame)->GetCellIndexes(rowIndex, colIndex);
nsIContent* cellContent = aCellFrame->GetContent();
PRUnichar* attr;
// see if the columnalign attribute is not already set
if (!cellContent->HasAttr(kNameSpaceID_None, nsGkAtoms::columnalign_) &&
!cellContent->HasAttr(kNameSpaceID_None,
nsGkAtoms::_moz_math_columnalign_)) {
// see if the columnalign attribute was specified on the row
attr = GetValueAt(aRowFrame, ColumnAlignProperty(),
nsGkAtoms::columnalign_, colIndex);
if (!attr) {
// see if the columnalign attribute was specified on the table
attr = GetValueAt(aTableFrame, ColumnAlignProperty(),
nsGkAtoms::columnalign_, colIndex);
}
if (attr) {
// set our special _moz attribute without notifying a reflow
cellContent->SetAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_columnalign_,
nsDependentString(attr), false);
}
}
// if we are not on the first column, see if |columnlines| was specified on
// the table. Note that we pass 'colIndex-1' because the CSS rule in mathml.css
// is associated to 'border-left', and it is as if we draw the line on behalf
// of the previous cell. This way of doing so allows us to handle selective lines,
// e.g., 'r|cl', and cases of spanning cells without further complications.
if (colIndex > 0 &&
!cellContent->HasAttr(kNameSpaceID_None,
nsGkAtoms::_moz_math_columnline_)) {
attr = GetValueAt(aTableFrame, ColumnLinesProperty(),
nsGkAtoms::columnlines_, colIndex-1);
if (attr) {
// set our special _moz attribute without notifying a reflow
cellContent->SetAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_columnline_,
nsDependentString(attr), false);
}
}
}
// 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)
{
// 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) {
MapRowAttributesIntoCSS(aTableFrame, rowFrame);
nsIFrame* cellFrame = rowFrame->GetFirstPrincipalChild();
for ( ; cellFrame; cellFrame = cellFrame->GetNextSibling()) {
DEBUG_VERIFY_THAT_FRAME_IS(cellFrame, TABLE_CELL);
if (IS_TABLE_CELL(cellFrame->GetType())) {
MapColAttributesIntoCSS(aTableFrame, rowFrame, cellFrame);
}
}
}
}
}
// 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::InheritAutomaticData(nsIFrame* aParent)
{
// XXX the REC says that by default, displaystyle=false in <mtable>
// let the base class inherit the displaystyle from our parent
nsMathMLFrame::InheritAutomaticData(aParent);
// see if the displaystyle attribute is there and let it override what we inherited
if (mContent->Tag() == nsGkAtoms::mtable_)
nsMathMLFrame::FindAttrDisplaystyle(mContent, mPresentationData);
return NS_OK;
}
// displaystyle is special in mtable...
// Since UpdatePresentation() and UpdatePresentationDataFromChildAt() can be called
// by a parent, ensure that the displaystyle attribute of mtable takes precedence
NS_IMETHODIMP
nsMathMLmtableOuterFrame::UpdatePresentationData(uint32_t aFlagsValues,
uint32_t aWhichFlags)
{
if (NS_MATHML_HAS_EXPLICIT_DISPLAYSTYLE(mPresentationData.flags)) {
// our current state takes precedence, disallow updating the displastyle
aWhichFlags &= ~NS_MATHML_DISPLAYSTYLE;
aFlagsValues &= ~NS_MATHML_DISPLAYSTYLE;
}
return nsMathMLFrame::UpdatePresentationData(aFlagsValues, aWhichFlags);
}
NS_IMETHODIMP
nsMathMLmtableOuterFrame::UpdatePresentationDataFromChildAt(int32_t aFirstIndex,
int32_t aLastIndex,
uint32_t aFlagsValues,
uint32_t aWhichFlags)
{
if (NS_MATHML_HAS_EXPLICIT_DISPLAYSTYLE(mPresentationData.flags)) {
// our current state takes precedence, disallow updating the displastyle
aWhichFlags &= ~NS_MATHML_DISPLAYSTYLE;
aFlagsValues &= ~NS_MATHML_DISPLAYSTYLE;
}
nsMathMLContainerFrame::PropagatePresentationDataFromChildAt(this,
aFirstIndex, aLastIndex, aFlagsValues, aWhichFlags);
return NS_OK;
}
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
// 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
nsIAtom* MOZrowAtom = nullptr;
nsIAtom* MOZcolAtom = nullptr;
if (aAttribute == nsGkAtoms::rowalign_)
MOZrowAtom = nsGkAtoms::_moz_math_rowalign_;
else if (aAttribute == nsGkAtoms::rowlines_)
MOZrowAtom = nsGkAtoms::_moz_math_rowline_;
else if (aAttribute == nsGkAtoms::columnalign_)
MOZcolAtom = nsGkAtoms::_moz_math_columnalign_;
else if (aAttribute == nsGkAtoms::columnlines_)
MOZcolAtom = nsGkAtoms::_moz_math_columnline_;
if (!MOZrowAtom && !MOZcolAtom)
return NS_OK;
nsPresContext* presContext = tableFrame->PresContext();
// clear any cached nsValueList for this table
presContext->PropertyTable()->
Delete(tableFrame, AttributeToProperty(aAttribute));
// unset any _moz attribute that we may have set earlier, and re-sync
nsIFrame* rowFrame = rgFrame->GetFirstPrincipalChild();
for ( ; rowFrame; rowFrame = rowFrame->GetNextSibling()) {
if (rowFrame->GetType() == nsGkAtoms::tableRowFrame) {
if (MOZrowAtom) { // let rows do the work
rowFrame->GetContent()->UnsetAttr(kNameSpaceID_None, MOZrowAtom, false);
MapRowAttributesIntoCSS(tableFrame, rowFrame);
} else { // let cells do the work
nsIFrame* cellFrame = rowFrame->GetFirstPrincipalChild();
for ( ; cellFrame; cellFrame = cellFrame->GetNextSibling()) {
if (IS_TABLE_CELL(cellFrame->GetType())) {
cellFrame->GetContent()->UnsetAttr(kNameSpaceID_None, MOZcolAtom, false);
MapColAttributesIntoCSS(tableFrame, rowFrame, cellFrame);
}
}
}
}
}
// Explicitly request a re-resolve and reflow in our subtree to pick up any changes
presContext->RestyleManager()->
PostRestyleEvent(mContent->AsElement(), eRestyle_Subtree,
nsChangeHint_AllReflowHints);
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>
// XXX should we also check <mstyle> ?
int32_t rowIndex = 0;
eAlign tableAlign = eAlign_axis;
GetAttribute(mContent, nullptr, 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.ascent = dy;
break;
case eAlign_bottom:
aDesiredSize.ascent = dy + height;
break;
case eAlign_center:
aDesiredSize.ascent = 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.ascent = dy + rowAscent;
break;
}
}
// in other situations, fallback to center
aDesiredSize.ascent = 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.ascent = dy + rowAscent;
break;
}
}
// in other situations, fallback to using half of the height
aDesiredSize.ascent = dy + height/2 + axisHeight;
}
}
mReference.x = 0;
mReference.y = aDesiredSize.ascent;
// just make-up a bounding metrics
mBoundingMetrics = nsBoundingMetrics();
mBoundingMetrics.ascent = aDesiredSize.ascent;
mBoundingMetrics.descent = aDesiredSize.height - aDesiredSize.ascent;
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 : Fully specified in mathml.css, and so HasAttributeDependentStyle() will
// pick it up and RestyleManager will issue a PostRestyleEvent().
// columnalign : Need an explicit re-style call.
if (aAttribute == nsGkAtoms::rowalign_) {
// unset any _moz attribute that we may have set earlier, and re-sync
mContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_rowalign_,
false);
MapRowAttributesIntoCSS(nsTableFrame::GetTableFrame(this), this);
// That's all - see comment above.
return NS_OK;
}
if (aAttribute != nsGkAtoms::columnalign_)
return NS_OK;
nsPresContext* presContext = PresContext();
// Clear any cached columnalign's nsValueList for this row
presContext->PropertyTable()->Delete(this, AttributeToProperty(aAttribute));
// Clear any internal _moz attribute that we may have set earlier
// in our cells and re-sync their columnalign attribute
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
nsIFrame* cellFrame = GetFirstPrincipalChild();
for ( ; cellFrame; cellFrame = cellFrame->GetNextSibling()) {
if (IS_TABLE_CELL(cellFrame->GetType())) {
cellFrame->GetContent()->
UnsetAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_columnalign_,
false);
MapColAttributesIntoCSS(tableFrame, this, cellFrame);
}
}
// Explicitly request a re-resolve and reflow in our subtree to pick up any changes
presContext->RestyleManager()->
PostRestyleEvent(mContent->AsElement(), eRestyle_Subtree,
nsChangeHint_AllReflowHints);
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 : in mathml.css
// columnalign : here
// rowspan : here
// columnspan : here
if (aAttribute == nsGkAtoms::columnalign_) {
// unset any _moz attribute that we may have set earlier, and re-sync
mContent->UnsetAttr(kNameSpaceID_None, nsGkAtoms::_moz_math_columnalign_,
false);
MapColAttributesIntoCSS(nsTableFrame::GetTableFrame(this), mParent, this);
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;
}
// --------
// 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()
{
}
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;
}
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