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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 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla MathML Project.
*
* The Initial Developer of the Original Code is
* The University Of Queensland.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Roger B. Sidje <rbs@maths.uq.edu.au>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsBlockFrame.h"
#include "nsPresContext.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.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"
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,
PRInt32 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 nsnull;
}
props.Set(aProperty, valueList);
}
PRInt32 count = valueList->mArray.Length();
return (aRowOrColIndex < count)
? valueList->mArray[aRowOrColIndex]
: valueList->mArray[count-1];
}
#ifdef NS_DEBUG
static bool
IsTable(PRUint8 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->GetStyleDisplay()->mDisplay, "internal error");
#define DEBUG_VERIFY_THAT_FRAME_IS_TABLE(_frame) \
NS_ASSERTION(IsTable(_frame->GetStyleDisplay()->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);
PRInt32 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);
PRInt32 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., top5 means anchor the table at
// the top of the 5th row, axis-1 means anchor the table on the axis of
// the last row (could have been nicer if the REC used the '#' separator,
// e.g., top#5, or axis#-1)
enum eAlign {
eAlign_top,
eAlign_bottom,
eAlign_center,
eAlign_baseline,
eAlign_axis
};
static void
ParseAlignAttribute(nsString& aValue, eAlign& aAlign, PRInt32& aRowIndex)
{
// by default, the table is centered about the axis
aRowIndex = 0;
aAlign = eAlign_axis;
PRInt32 len = 0;
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) {
PRInt32 error;
aValue.Cut(0, len); // aValue is not a const here
aRowIndex = aValue.ToInteger(&error);
if (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(PRUint32 aFlagsValues,
PRUint32 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(PRInt32 aFirstIndex,
PRInt32 aLastIndex,
PRUint32 aFlagsValues,
PRUint32 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(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 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 = nsnull;
nsIAtom* MOZcolAtom = nsnull;
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->PresShell()->FrameConstructor()->
PostRestyleEvent(mContent->AsElement(), eRestyle_Subtree,
nsChangeHint_ReflowFrame);
return NS_OK;
}
nsIFrame*
nsMathMLmtableOuterFrame::GetRowFrameAt(nsPresContext* aPresContext,
PRInt32 aRowIndex)
{
PRInt32 rowCount, colCount;
GetTableSize(rowCount, colCount);
// 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 nsnull;
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 nsnull;
return rowFrame;
}
--aRowIndex;
}
}
return nsnull;
}
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> ?
PRInt32 rowIndex = 0;
eAlign tableAlign = eAlign_axis;
GetAttribute(mContent, nsnull, 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 = nsnull;
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()->PresShell()->FrameConstructor()->
PostRestyleEvent(mContent->AsElement(), eRestyle_Subtree,
nsChangeHint_ReflowFrame);
}
// --------
// 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(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
// Attributes specific to <mtr>:
// groupalign : Not yet supported.
// rowalign : Fully specified in mathml.css, and so HasAttributeDependentStyle() will
// pick it up and nsCSSFrameConstructor 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->PresShell()->FrameConstructor()->
PostRestyleEvent(mContent->AsElement(), eRestyle_Subtree,
nsChangeHint_ReflowFrame);
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()
{
}
PRInt32
nsMathMLmtdFrame::GetRowSpan()
{
PRInt32 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_) && !GetStyleContext()->GetPseudo()) {
nsAutoString value;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::rowspan, value);
if (!value.IsEmpty()) {
PRInt32 error;
rowspan = value.ToInteger(&error);
if (error || rowspan < 0)
rowspan = 1;
rowspan = NS_MIN(rowspan, MAX_ROWSPAN);
}
}
return rowspan;
}
PRInt32
nsMathMLmtdFrame::GetColSpan()
{
PRInt32 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_) && !GetStyleContext()->GetPseudo()) {
nsAutoString value;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::columnspan_, value);
if (!value.IsEmpty()) {
PRInt32 error;
colspan = value.ToInteger(&error);
if (error || colspan < 0 || colspan > MAX_COLSPAN)
colspan = 1;
}
}
return colspan;
}
NS_IMETHODIMP
nsMathMLmtdFrame::AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 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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