MCL/sf/mw/web: comparison webengine/osswebengine/WebCore/rendering/RenderTableSection.cpp

equal deleted inserted replaced

--1:000000000000
+:dd21522fd290
+/**
+* This file is part of the DOM implementation for KDE.
+*
+* Copyright (C) 1997 Martin Jones (mjones@kde.org)
+*           (C) 1997 Torben Weis (weis@kde.org)
+*           (C) 1998 Waldo Bastian (bastian@kde.org)
+*           (C) 1999 Lars Knoll (knoll@kde.org)
+*           (C) 1999 Antti Koivisto (koivisto@kde.org)
+* Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.
+* Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Library General Public
+* License as published by the Free Software Foundation; either
+* version 2 of the License, or (at your option) any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Library General Public License for more details.
+*
+* You should have received a copy of the GNU Library General Public License
+* along with this library; see the file COPYING.LIB.  If not, write to
+* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+* Boston, MA 02110-1301, USA.
+*/
+#include "config.h"
+#include "RenderTableSection.h"
+#include "CachedImage.h"
+#include "Document.h"
+#include "HTMLNames.h"
+#include "RenderTableCell.h"
+#include "RenderTableCol.h"
+#include "RenderTableRow.h"
+#include "RenderView.h"
+#include "TextStream.h"
+#include <limits>
+#include <wtf/Vector.h>
+using namespace std;
+namespace WebCore {
+using namespace HTMLNames;
+RenderTableSection::RenderTableSection(Node* node)
+: RenderContainer(node)
+, m_gridRows(0)
+, m_cCol(0)
+, m_cRow(-1)
+, m_needsCellRecalc(false)
+, m_outerBorderLeft(0)
+, m_outerBorderRight(0)
+, m_outerBorderTop(0)
+, m_outerBorderBottom(0)
+, m_overflowLeft(0)
+, m_overflowWidth(0)
+, m_overflowTop(0)
+, m_overflowHeight(0)
+, m_hasOverflowingCell(false)
+{
+// init RenderObject attributes
+setInline(false);   // our object is not Inline
+}
+RenderTableSection::~RenderTableSection()
+{
+clearGrid();
+}
+void RenderTableSection::destroy()
+{
+RenderTable* recalcTable = table();
+RenderContainer::destroy();
+// recalc cell info because RenderTable has unguarded pointers
+// stored that point to this RenderTableSection.
+if (recalcTable)
+recalcTable->setNeedsSectionRecalc();
+}
+void RenderTableSection::setStyle(RenderStyle* newStyle)
+{
+// we don't allow changing this one
+if (style())
+newStyle->setDisplay(style()->display());
+else if (newStyle->display() != TABLE_FOOTER_GROUP && newStyle->display() != TABLE_HEADER_GROUP)
+newStyle->setDisplay(TABLE_ROW_GROUP);
+RenderContainer::setStyle(newStyle);
+}
+void RenderTableSection::addChild(RenderObject* child, RenderObject* beforeChild)
+{
+// Make sure we don't append things after :after-generated content if we have it.
+if (!beforeChild && isAfterContent(lastChild()))
+beforeChild = lastChild();
+bool isTableSection = element() && (element()->hasTagName(theadTag) || element()->hasTagName(tbodyTag) || element()->hasTagName(tfootTag));
+if (!child->isTableRow()) {
+if (isTableSection && child->element() && child->element()->hasTagName(formTag) && document()->isHTMLDocument()) {
+RenderContainer::addChild(child, beforeChild);
+return;
+}
+RenderObject* last = beforeChild;
+if (!last)
+last = lastChild();
+if (last && last->isAnonymous()) {
+last->addChild(child);
+return;
+}
+// If beforeChild is inside an anonymous cell/row, insert into the cell or into
+// the anonymous row containing it, if there is one.
+RenderObject* lastBox = last;
+while (lastBox && lastBox->parent()->isAnonymous() && !lastBox->isTableRow())
+lastBox = lastBox->parent();
+if (lastBox && lastBox->isAnonymous()) {
+lastBox->addChild(child, beforeChild);
+return;
+}
+RenderObject* row = new (renderArena()) RenderTableRow(document() /* anonymous table */);
+RenderStyle* newStyle = new (renderArena()) RenderStyle();
+newStyle->inheritFrom(style());
+newStyle->setDisplay(TABLE_ROW);
+row->setStyle(newStyle);
+addChild(row, beforeChild);
+row->addChild(child);
+return;
+}
+if (beforeChild)
+setNeedsCellRecalc();
+++m_cRow;
+m_cCol = 0;
+// make sure we have enough rows
+if (!ensureRows(m_cRow + 1))
+return;
+m_grid[m_cRow].rowRenderer = child;
+if (!beforeChild) {
+m_grid[m_cRow].height = child->style()->height();
+if (m_grid[m_cRow].height.isRelative())
+m_grid[m_cRow].height = Length();
+}
+// If the next renderer is actually wrapped in an anonymous table row, we need to go up and find that.
+while (beforeChild && !beforeChild->isTableRow())
+beforeChild = beforeChild->parent();
+RenderContainer::addChild(child, beforeChild);
+}
+bool RenderTableSection::ensureRows(int numRows)
+{
+int nRows = m_gridRows;
+if (numRows > nRows) {
+if (numRows > static_cast<int>(m_grid.size())) {
+size_t maxSize = numeric_limits<size_t>::max() / sizeof(RowStruct);
+if (static_cast<size_t>(numRows) > maxSize)
+return false;
+m_grid.resize(numRows);
+}
+m_gridRows = numRows;
+int nCols = table()->numEffCols();
+CellStruct emptyCellStruct;
+emptyCellStruct.cell = 0;
+emptyCellStruct.inColSpan = false;
+for (int r = nRows; r < numRows; r++) {
+m_grid[r].row = new Row(nCols);
+m_grid[r].row->fill(emptyCellStruct);
+m_grid[r].rowRenderer = 0;
+m_grid[r].baseline = 0;
+m_grid[r].height = Length();
+}
+}
+return true;
+}
+void RenderTableSection::addCell(RenderTableCell* cell, RenderObject* row)
+{
+int rSpan = cell->rowSpan();
+int cSpan = cell->colSpan();
+Vector<RenderTable::ColumnStruct>& columns = table()->columns();
+int nCols = columns.size();
+// ### mozilla still seems to do the old HTML way, even for strict DTD
+// (see the annotation on table cell layouting in the CSS specs and the testcase below:
+// <TABLE border>
+// <TR><TD>1 <TD rowspan="2">2 <TD>3 <TD>4
+// <TR><TD colspan="2">5
+// </TABLE>
+while (m_cCol < nCols && (cellAt(m_cRow, m_cCol).cell || cellAt(m_cRow, m_cCol).inColSpan))
+m_cCol++;
+if (rSpan == 1) {
+// we ignore height settings on rowspan cells
+Length height = cell->style()->height();
+if (height.isPositive() || (height.isRelative() && height.value() >= 0)) {
+Length cRowHeight = m_grid[m_cRow].height;
+switch (height.type()) {
+case Percent:
+if (!(cRowHeight.isPercent()) ||
+(cRowHeight.isPercent() && cRowHeight.rawValue() < height.rawValue()))
+m_grid[m_cRow].height = height;
+break;
+case Fixed:
+if (cRowHeight.type() < Percent ||
+(cRowHeight.isFixed() && cRowHeight.value() < height.value()))
+m_grid[m_cRow].height = height;
+break;
+case Relative:
+default:
+break;
+}
+}
+}
+// make sure we have enough rows
+if (!ensureRows(m_cRow + rSpan))
+return;
+m_grid[m_cRow].rowRenderer = row;
+int col = m_cCol;
+// tell the cell where it is
+CellStruct currentCell;
+currentCell.cell = cell;
+currentCell.inColSpan = false;
+while (cSpan) {
+int currentSpan;
+if (m_cCol >= nCols) {
+table()->appendColumn(cSpan);
+currentSpan = cSpan;
+} else {
+if (cSpan < columns[m_cCol].span)
+table()->splitColumn(m_cCol, cSpan);
+currentSpan = columns[m_cCol].span;
+}
+for (int r = 0; r < rSpan; r++) {
+CellStruct& c = cellAt(m_cRow + r, m_cCol);
+if (currentCell.cell && !c.cell)
+c.cell = currentCell.cell;
+if (currentCell.inColSpan)
+c.inColSpan = true;
+}
+m_cCol++;
+cSpan -= currentSpan;
+currentCell.cell = 0;
+currentCell.inColSpan = true;
+}
+if (cell) {
+cell->setRow(m_cRow);
+cell->setCol(table()->effColToCol(col));
+}
+}
+void RenderTableSection::setCellWidths()
+{
+Vector<int>& columnPos = table()->columnPositions();
+bool pushedLayoutState = false;
+for (int i = 0; i < m_gridRows; i++) {
+Row& row = *m_grid[i].row;
+int cols = row.size();
+for (int j = 0; j < cols; j++) {
+CellStruct current = row[j];
+RenderTableCell* cell = current.cell;
+if (!cell)
+continue;
+int endCol = j;
+int cspan = cell->colSpan();
+while (cspan && endCol < cols) {
+cspan -= table()->columns()[endCol].span;
+endCol++;
+}
+int w = columnPos[endCol] - columnPos[j] - table()->hBorderSpacing();
+int oldWidth = cell->width();
+if (w != oldWidth) {
+cell->setNeedsLayout(true);
+if (!table()->selfNeedsLayout() && cell->checkForRepaintDuringLayout()) {
+if (!pushedLayoutState) {
+// Technically, we should also push state for the row, but since
+// rows don't push a coordinate transform, that's not necessary.
+view()->pushLayoutState(this, IntSize(m_x, m_y));
+pushedLayoutState = true;
+}
+cell->repaint();
+}
+cell->setWidth(w);
+}
+}
+}
+if (pushedLayoutState)
+view()->popLayoutState();
+}
+void RenderTableSection::calcRowHeight()
+{
+RenderTableCell* cell;
+int spacing = table()->vBorderSpacing();
+bool pushedLayoutState = false;
+m_rowPos.resize(m_gridRows + 1);
+m_rowPos[0] = spacing;
+for (int r = 0; r < m_gridRows; r++) {
+m_rowPos[r + 1] = 0;
+m_grid[r].baseline = 0;
+int baseline = 0;
+int bdesc = 0;
+int ch = m_grid[r].height.calcMinValue(0);
+int pos = m_rowPos[r] + ch + (m_grid[r].rowRenderer ? spacing : 0);
+m_rowPos[r + 1] = max(m_rowPos[r + 1], pos);
+Row* row = m_grid[r].row;
+int totalCols = row->size();
+for (int c = 0; c < totalCols; c++) {
+CellStruct current = cellAt(r, c);
+cell = current.cell;
+if (!cell || current.inColSpan)
+continue;
+if (r < m_gridRows - 1 && cellAt(r + 1, c).cell == cell)
+continue;
+int indx = max(r - cell->rowSpan() + 1, 0);
+if (cell->overrideSize() != -1) {
+if (!pushedLayoutState) {
+// Technically, we should also push state for the row, but since
+// rows don't push a coordinate transform, that's not necessary.
+view()->pushLayoutState(this, IntSize(m_x, m_y));
+pushedLayoutState = true;
+}
+cell->setOverrideSize(-1);
+cell->setChildNeedsLayout(true, false);
+cell->layoutIfNeeded();
+}
+// Explicit heights use the border box in quirks mode.  In strict mode do the right
+// thing and actually add in the border and padding.
+ch = cell->style()->height().calcValue(0) +
+(cell->style()->htmlHacks() ? 0 : (cell->paddingTop() + cell->paddingBottom() +
+cell->borderTop() + cell->borderBottom()));
+ch = max(ch, cell->height());
+pos = m_rowPos[indx] + ch + (m_grid[r].rowRenderer ? spacing : 0);
+m_rowPos[r + 1] = max(m_rowPos[r + 1], pos);
+// find out the baseline
+EVerticalAlign va = cell->style()->verticalAlign();
+if (va == BASELINE || va == TEXT_BOTTOM || va == TEXT_TOP || va == SUPER || va == SUB) {
+int b = cell->baselinePosition();
+if (b > cell->borderTop() + cell->paddingTop()) {
+baseline = max(baseline, b);
+bdesc = max(bdesc, m_rowPos[indx] + ch - b);
+}
+}
+}
+//do we have baseline aligned elements?
+if (baseline) {
+// increase rowheight if baseline requires
+m_rowPos[r + 1] = max(m_rowPos[r + 1], baseline + bdesc + (m_grid[r].rowRenderer ? spacing : 0));
+m_grid[r].baseline = baseline;
+}
+m_rowPos[r + 1] = max(m_rowPos[r + 1], m_rowPos[r]);
+}
+if (pushedLayoutState)
+view()->popLayoutState();
+}
+int RenderTableSection::layoutRows(int toAdd)
+{
+int rHeight;
+int rindx;
+int totalRows = m_gridRows;
+// Set the width of our section now.  The rows will also be this width.
+m_width = table()->contentWidth();
+m_overflowLeft = 0;
+m_overflowWidth = m_width;
+m_overflowTop = 0;
+m_overflowHeight = 0;
+m_hasOverflowingCell = false;
+if (table()->collapseBorders())
+recalcOuterBorder();
+if (toAdd && totalRows && (m_rowPos[totalRows] || !nextSibling())) {
+int totalHeight = m_rowPos[totalRows] + toAdd;
+int dh = toAdd;
+int totalPercent = 0;
+int numAuto = 0;
+for (int r = 0; r < totalRows; r++) {
+if (m_grid[r].height.isAuto())
+numAuto++;
+else if (m_grid[r].height.isPercent())
+totalPercent += m_grid[r].height.rawValue();
+}
+if (totalPercent) {
+// try to satisfy percent
+int add = 0;
+totalPercent = min(totalPercent, 100 * percentScaleFactor);
+int rh = m_rowPos[1] - m_rowPos[0];
+for (int r = 0; r < totalRows; r++) {
+if (totalPercent > 0 && m_grid[r].height.isPercent()) {
+int toAdd = min(dh, (totalHeight * m_grid[r].height.rawValue() / (100 * percentScaleFactor)) - rh);
+// If toAdd is negative, then we don't want to shrink the row (this bug
+// affected Outlook Web Access).
+toAdd = max(0, toAdd);
+add += toAdd;
+dh -= toAdd;
+totalPercent -= m_grid[r].height.rawValue();
+}
+if (r < totalRows - 1)
+rh = m_rowPos[r + 2] - m_rowPos[r + 1];
+m_rowPos[r + 1] += add;
+}
+}
+if (numAuto) {
+// distribute over variable cols
+int add = 0;
+for (int r = 0; r < totalRows; r++) {
+if (numAuto > 0 && m_grid[r].height.isAuto()) {
+int toAdd = dh / numAuto;
+add += toAdd;
+dh -= toAdd;
+numAuto--;
+}
+m_rowPos[r + 1] += add;
+}
+}
+if (dh > 0 && m_rowPos[totalRows]) {
+// if some left overs, distribute equally.
+int tot = m_rowPos[totalRows];
+int add = 0;
+int prev = m_rowPos[0];
+for (int r = 0; r < totalRows; r++) {
+//weight with the original height
+add += dh * (m_rowPos[r + 1] - prev) / tot;
+prev = m_rowPos[r + 1];
+m_rowPos[r + 1] += add;
+}
+}
+}
+int hspacing = table()->hBorderSpacing();
+int vspacing = table()->vBorderSpacing();
+int nEffCols = table()->numEffCols();
+view()->pushLayoutState(this, IntSize(m_x, m_y));
+for (int r = 0; r < totalRows; r++) {
+// Set the row's x/y position and width/height.
+if (RenderObject* rowRenderer = m_grid[r].rowRenderer) {
+rowRenderer->setPos(0, m_rowPos[r]);
+rowRenderer->setWidth(m_width);
+rowRenderer->setHeight(m_rowPos[r + 1] - m_rowPos[r] - vspacing);
+}
+for (int c = 0; c < nEffCols; c++) {
+RenderTableCell* cell = cellAt(r, c).cell;
+if (!cell)
+continue;
+if (r < totalRows - 1 && cell == cellAt(r + 1, c).cell)
+continue;
+rindx = max(0, r - cell->rowSpan() + 1);
+rHeight = m_rowPos[r + 1] - m_rowPos[rindx] - vspacing;
+// Force percent height children to lay themselves out again.
+// This will cause these children to grow to fill the cell.
+// FIXME: There is still more work to do here to fully match WinIE (should
+// it become necessary to do so).  In quirks mode, WinIE behaves like we
+// do, but it will clip the cells that spill out of the table section.  In
+// strict mode, Mozilla and WinIE both regrow the table to accommodate the
+// new height of the cell (thus letting the percentages cause growth one
+// time only).  We may also not be handling row-spanning cells correctly.
+//
+// Note also the oddity where replaced elements always flex, and yet blocks/tables do
+// not necessarily flex.  WinIE is crazy and inconsistent, and we can't hope to
+// match the behavior perfectly, but we'll continue to refine it as we discover new
+// bugs. :)
+bool cellChildrenFlex = false;
+bool flexAllChildren = cell->style()->height().isFixed() ||
+(!table()->style()->height().isAuto() && rHeight != cell->height());
+for (RenderObject* o = cell->firstChild(); o; o = o->nextSibling()) {
+if (!o->isText() && o->style()->height().isPercent() && (o->isReplaced() || o->scrollsOverflow() || flexAllChildren)) {
+// Tables with no sections do not flex.
+if (!o->isTable() || static_cast<RenderTable*>(o)->hasSections()) {
+o->setNeedsLayout(true, false);
+cell->setChildNeedsLayout(true, false);
+cellChildrenFlex = true;
+}
+}
+}
+if (cellChildrenFlex) {
+// Alignment within a cell is based off the calculated
+// height, which becomes irrelevant once the cell has
+// been resized based off its percentage. -dwh
+cell->setOverrideSize(max(0,
+rHeight - cell->borderTop() - cell->paddingTop() -
+cell->borderBottom() - cell->paddingBottom()));
+cell->layoutIfNeeded();
+// If the baseline moved, we may have to update the data for our row. Find out the new baseline.
+EVerticalAlign va = cell->style()->verticalAlign();
+if (va == BASELINE || va == TEXT_BOTTOM || va == TEXT_TOP || va == SUPER || va == SUB) {
+int b = cell->baselinePosition();
+if (b > cell->borderTop() + cell->paddingTop())
+m_grid[r].baseline = max(m_grid[r].baseline, b);
+}
+}
+int te = 0;
+switch (cell->style()->verticalAlign()) {
+case SUB:
+case SUPER:
+case TEXT_TOP:
+case TEXT_BOTTOM:
+case BASELINE:
+te = getBaseline(r) - cell->baselinePosition();
+break;
+case TOP:
+te = 0;
+break;
+case MIDDLE:
+te = (rHeight - cell->height()) / 2;
+break;
+case BOTTOM:
+te = rHeight - cell->height();
+break;
+default:
+break;
+}
+int oldTe = cell->borderTopExtra();
+int oldBe = cell->borderBottomExtra();
+int be = rHeight - cell->height() - te;
+cell->setCellTopExtra(te);
+cell->setCellBottomExtra(be);
+if ((te != oldTe || be > oldBe) && !table()->selfNeedsLayout() && cell->checkForRepaintDuringLayout())
+cell->repaint();
+IntRect oldCellRect(cell->xPos(), cell->yPos() - cell->borderTopExtra() , cell->width(), cell->height());
+if (style()->direction() == RTL) {
+cell->setPos(table()->columnPositions()[nEffCols] - table()->columnPositions()[table()->colToEffCol(cell->col() + cell->colSpan())] + hspacing, m_rowPos[rindx]);
+} else
+cell->setPos(table()->columnPositions()[c] + hspacing, m_rowPos[rindx]);
+m_overflowLeft = min(m_overflowLeft, cell->xPos() + cell->overflowLeft(false));
+m_overflowWidth = max(m_overflowWidth, cell->xPos() + cell->overflowWidth(false));
+m_overflowTop = min(m_overflowTop, cell->yPos() + cell->overflowTop(false));
+m_overflowHeight = max(m_overflowHeight, cell->yPos() + cell->overflowHeight(false));
+m_hasOverflowingCell |= cell->overflowLeft(false) || cell->overflowWidth(false) > cell->width() || cell->overflowTop(false) || cell->overflowHeight(false) > cell->height();
+// If the cell moved, we have to repaint it as well as any floating/positioned
+// descendants.  An exception is if we need a layout.  In this case, we know we're going to
+// repaint ourselves (and the cell) anyway.
+if (!table()->selfNeedsLayout() && cell->checkForRepaintDuringLayout())
+cell->repaintDuringLayoutIfMoved(oldCellRect);
+}
+}
+view()->popLayoutState();
+m_height = m_rowPos[totalRows];
+m_overflowHeight = max(m_overflowHeight, m_height);
+return m_height;
+}
+int RenderTableSection::lowestPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+int bottom = RenderContainer::lowestPosition(includeOverflowInterior, includeSelf);
+if (!includeOverflowInterior && hasOverflowClip())
+return bottom;
+for (RenderObject* row = firstChild(); row; row = row->nextSibling()) {
+for (RenderObject* cell = row->firstChild(); cell; cell = cell->nextSibling()) {
+if (cell->isTableCell())
+bottom = max(bottom, cell->yPos() + cell->lowestPosition(false));
+}
+}
+return bottom;
+}
+int RenderTableSection::rightmostPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+int right = RenderContainer::rightmostPosition(includeOverflowInterior, includeSelf);
+if (!includeOverflowInterior && hasOverflowClip())
+return right;
+for (RenderObject* row = firstChild(); row; row = row->nextSibling()) {
+for (RenderObject* cell = row->firstChild(); cell; cell = cell->nextSibling()) {
+if (cell->isTableCell())
+right = max(right, cell->xPos() + cell->rightmostPosition(false));
+}
+}
+return right;
+}
+int RenderTableSection::leftmostPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+int left = RenderContainer::leftmostPosition(includeOverflowInterior, includeSelf);
+if (!includeOverflowInterior && hasOverflowClip())
+return left;
+for (RenderObject* row = firstChild(); row; row = row->nextSibling()) {
+for (RenderObject* cell = row->firstChild(); cell; cell = cell->nextSibling()) {
+if (cell->isTableCell())
+left = min(left, cell->xPos() + cell->leftmostPosition(false));
+}
+}
+return left;
+}
+int RenderTableSection::calcOuterBorderTop() const
+{
+int totalCols = table()->numEffCols();
+if (!m_gridRows || !totalCols)
+return 0;
+unsigned borderWidth = 0;
+const BorderValue& sb = style()->borderTop();
+if (sb.style() == BHIDDEN)
+return -1;
+if (sb.style() > BHIDDEN)
+borderWidth = sb.width;
+const BorderValue& rb = firstChild()->style()->borderTop();
+if (rb.style() == BHIDDEN)
+return -1;
+if (rb.style() > BHIDDEN && rb.width > borderWidth)
+borderWidth = rb.width;
+bool allHidden = true;
+for (int c = 0; c < totalCols; c++) {
+const CellStruct& current = cellAt(0, c);
+if (current.inColSpan || !current.cell)
+continue;
+const BorderValue& cb = current.cell->style()->borderTop();
+// FIXME: Don't repeat for the same col group
+RenderTableCol* colGroup = table()->colElement(c);
+if (colGroup) {
+const BorderValue& gb = colGroup->style()->borderTop();
+if (gb.style() == BHIDDEN || cb.style() == BHIDDEN)
+continue;
+else
+allHidden = false;
+if (gb.style() > BHIDDEN && gb.width > borderWidth)
+borderWidth = gb.width;
+if (cb.style() > BHIDDEN && cb.width > borderWidth)
+borderWidth = cb.width;
+} else {
+if (cb.style() == BHIDDEN)
+continue;
+else
+allHidden = false;
+if (cb.style() > BHIDDEN && cb.width > borderWidth)
+borderWidth = cb.width;
+}
+}
+if (allHidden)
+return -1;
+return borderWidth / 2;
+}
+int RenderTableSection::calcOuterBorderBottom() const
+{
+int totalCols = table()->numEffCols();
+if (!m_gridRows || !totalCols)
+return 0;
+unsigned borderWidth = 0;
+const BorderValue& sb = style()->borderBottom();
+if (sb.style() == BHIDDEN)
+return -1;
+if (sb.style() > BHIDDEN)
+borderWidth = sb.width;
+const BorderValue& rb = lastChild()->style()->borderBottom();
+if (rb.style() == BHIDDEN)
+return -1;
+if (rb.style() > BHIDDEN && rb.width > borderWidth)
+borderWidth = rb.width;
+bool allHidden = true;
+for (int c = 0; c < totalCols; c++) {
+const CellStruct& current = cellAt(m_gridRows - 1, c);
+if (current.inColSpan || !current.cell)
+continue;
+const BorderValue& cb = current.cell->style()->borderBottom();
+// FIXME: Don't repeat for the same col group
+RenderTableCol* colGroup = table()->colElement(c);
+if (colGroup) {
+const BorderValue& gb = colGroup->style()->borderBottom();
+if (gb.style() == BHIDDEN || cb.style() == BHIDDEN)
+continue;
+else
+allHidden = false;
+if (gb.style() > BHIDDEN && gb.width > borderWidth)
+borderWidth = gb.width;
+if (cb.style() > BHIDDEN && cb.width > borderWidth)
+borderWidth = cb.width;
+} else {
+if (cb.style() == BHIDDEN)
+continue;
+else
+allHidden = false;
+if (cb.style() > BHIDDEN && cb.width > borderWidth)
+borderWidth = cb.width;
+}
+}
+if (allHidden)
+return -1;
+return (borderWidth + 1) / 2;
+}
+int RenderTableSection::calcOuterBorderLeft(bool rtl) const
+{
+int totalCols = table()->numEffCols();
+if (!m_gridRows || !totalCols)
+return 0;
+unsigned borderWidth = 0;
+const BorderValue& sb = style()->borderLeft();
+if (sb.style() == BHIDDEN)
+return -1;
+if (sb.style() > BHIDDEN)
+borderWidth = sb.width;
+int leftmostColumn = rtl ? totalCols - 1 : 0;
+RenderTableCol* colGroup = table()->colElement(leftmostColumn);
+if (colGroup) {
+const BorderValue& gb = colGroup->style()->borderLeft();
+if (gb.style() == BHIDDEN)
+return -1;
+if (gb.style() > BHIDDEN && gb.width > borderWidth)
+borderWidth = gb.width;
+}
+bool allHidden = true;
+for (int r = 0; r < m_gridRows; r++) {
+const CellStruct& current = cellAt(r, leftmostColumn);
+if (!current.cell)
+continue;
+// FIXME: Don't repeat for the same cell
+const BorderValue& cb = current.cell->style()->borderLeft();
+const BorderValue& rb = current.cell->parent()->style()->borderLeft();
+if (cb.style() == BHIDDEN || rb.style() == BHIDDEN)
+continue;
+else
+allHidden = false;
+if (cb.style() > BHIDDEN && cb.width > borderWidth)
+borderWidth = cb.width;
+if (rb.style() > BHIDDEN && rb.width > borderWidth)
+borderWidth = rb.width;
+}
+if (allHidden)
+return -1;
+return borderWidth / 2;
+}
+int RenderTableSection::calcOuterBorderRight(bool rtl) const
+{
+int totalCols = table()->numEffCols();
+if (!m_gridRows || !totalCols)
+return 0;
+unsigned borderWidth = 0;
+const BorderValue& sb = style()->borderRight();
+if (sb.style() == BHIDDEN)
+return -1;
+if (sb.style() > BHIDDEN)
+borderWidth = sb.width;
+int rightmostColumn = rtl ? 0 : totalCols - 1;
+RenderTableCol* colGroup = table()->colElement(rightmostColumn);
+if (colGroup) {
+const BorderValue& gb = colGroup->style()->borderRight();
+if (gb.style() == BHIDDEN)
+return -1;
+if (gb.style() > BHIDDEN && gb.width > borderWidth)
+borderWidth = gb.width;
+}
+bool allHidden = true;
+for (int r = 0; r < m_gridRows; r++) {
+const CellStruct& current = cellAt(r, rightmostColumn);
+if (!current.cell)
+continue;
+// FIXME: Don't repeat for the same cell
+const BorderValue& cb = current.cell->style()->borderRight();
+const BorderValue& rb = current.cell->parent()->style()->borderRight();
+if (cb.style() == BHIDDEN || rb.style() == BHIDDEN)
+continue;
+else
+allHidden = false;
+if (cb.style() > BHIDDEN && cb.width > borderWidth)
+borderWidth = cb.width;
+if (rb.style() > BHIDDEN && rb.width > borderWidth)
+borderWidth = rb.width;
+}
+if (allHidden)
+return -1;
+return (borderWidth + 1) / 2;
+}
+void RenderTableSection::recalcOuterBorder()
+{
+bool rtl = table()->style()->direction() == RTL;
+m_outerBorderTop = calcOuterBorderTop();
+m_outerBorderBottom = calcOuterBorderBottom();
+m_outerBorderLeft = calcOuterBorderLeft(rtl);
+m_outerBorderRight = calcOuterBorderRight(rtl);
+}
+void RenderTableSection::paint(PaintInfo& paintInfo, int tx, int ty)
+{
+// put this back in when all layout tests can handle it
+// ASSERT(!needsLayout());
+// avoid crashing on bugs that cause us to paint with dirty layout
+if (needsLayout())
+return;
+unsigned totalRows = m_gridRows;
+unsigned totalCols = table()->columns().size();
+if (!totalRows || !totalCols)
+return;
+tx += m_x;
+ty += m_y;
+// Check which rows and cols are visible and only paint these.
+// FIXME: Could use a binary search here.
+PaintPhase paintPhase = paintInfo.phase;
+int x = paintInfo.rect.x();
+int y = paintInfo.rect.y();
+int w = paintInfo.rect.width();
+int h = paintInfo.rect.height();
+int os = 2 * maximalOutlineSize(paintPhase);
+unsigned startrow = 0;
+unsigned endrow = totalRows;
+// If some cell overflows, just paint all of them.
+if (!m_hasOverflowingCell && m_rowPos.size()) {
+for (; startrow < totalRows; startrow++) {
+if (ty + m_rowPos[startrow + 1] >= y - os)
+break;
+}
+if (startrow == totalRows && ty + m_rowPos[totalRows] + table()->outerBorderBottom() >= y - os)
+startrow--;
+for (; endrow > 0; endrow--) {
+if (ty + m_rowPos[endrow - 1] <= y + h + os)
+break;
+}
+if (!endrow && ty + m_rowPos[0] - table()->outerBorderTop() <= y + h + os)
+endrow++;
+}
+unsigned startcol = 0;
+unsigned endcol = totalCols;
+// FIXME: Implement RTL.
+if (!m_hasOverflowingCell && style()->direction() == LTR) {
+for (; startcol < totalCols; startcol++) {
+if (tx + table()->columnPositions()[startcol + 1] >= x - os)
+break;
+}
+if (startcol == totalCols && tx + table()->columnPositions()[totalCols] + table()->outerBorderRight() >= x - os)
+startcol--;
+for (; endcol > 0; endcol--) {
+if (tx + table()->columnPositions()[endcol - 1] <= x + w + os)
+break;
+}
+if (!endcol && tx + table()->columnPositions()[0] - table()->outerBorderLeft() <= y + w + os)
+endcol++;
+}
+if (startcol < endcol) {
+// draw the cells
+for (unsigned r = startrow; r < endrow; r++) {
+unsigned c = startcol;
+// since a cell can be -1 (indicating a colspan) we might have to search backwards to include it
+while (c && cellAt(r, c).inColSpan)
+c--;
+for (; c < endcol; c++) {
+CellStruct current = cellAt(r, c);
+RenderTableCell* cell = current.cell;
+// Cells must always paint in the order in which they appear taking into account
+// their upper left originating row/column.  For cells with rowspans, avoid repainting
+// if we've already seen the cell.
+if (!cell || (r > startrow && (cellAt(r - 1, c).cell == cell)))
+continue;
+RenderTableRow* row = static_cast<RenderTableRow*>(cell->parent());
+if (paintPhase == PaintPhaseBlockBackground || paintPhase == PaintPhaseChildBlockBackground) {
+// We need to handle painting a stack of backgrounds.  This stack (from bottom to top) consists of
+// the column group, column, row group, row, and then the cell.
+RenderObject* col = table()->colElement(c);
+RenderObject* colGroup = 0;
+if (col && col->parent()->style()->display() == TABLE_COLUMN_GROUP)
+colGroup = col->parent();
+// Column groups and columns first.
+// FIXME: Columns and column groups do not currently support opacity, and they are being painted "too late" in
+// the stack, since we have already opened a transparency layer (potentially) for the table row group.
+// Note that we deliberately ignore whether or not the cell has a layer, since these backgrounds paint "behind" the
+// cell.
+cell->paintBackgroundsBehindCell(paintInfo, tx, ty, colGroup);
+cell->paintBackgroundsBehindCell(paintInfo, tx, ty, col);
+// Paint the row group next.
+cell->paintBackgroundsBehindCell(paintInfo, tx, ty, this);
+// Paint the row next, but only if it doesn't have a layer.  If a row has a layer, it will be responsible for
+// painting the row background for the cell.
+if (!row->hasLayer())
+cell->paintBackgroundsBehindCell(paintInfo, tx, ty, row);
+}
+if ((!cell->hasLayer() && !row->hasLayer()) || paintInfo.phase == PaintPhaseCollapsedTableBorders)
+cell->paint(paintInfo, tx, ty);
+}
+}
+}
+}
+void RenderTableSection::imageChanged(CachedImage* image)
+{
+if (!image || !image->canRender() || !parent())
+return;
+// FIXME: Examine cells and repaint only the rect the image paints in.
+repaint();
+}
+void RenderTableSection::recalcCells()
+{
+m_cCol = 0;
+m_cRow = -1;
+clearGrid();
+m_gridRows = 0;
+for (RenderObject* row = firstChild(); row; row = row->nextSibling()) {
+if (row->isTableRow()) {
+m_cRow++;
+m_cCol = 0;
+if (!ensureRows(m_cRow + 1))
+break;
+m_grid[m_cRow].rowRenderer = row;
+for (RenderObject* cell = row->firstChild(); cell; cell = cell->nextSibling()) {
+if (cell->isTableCell())
+addCell(static_cast<RenderTableCell*>(cell), row);
+}
+}
+}
+m_needsCellRecalc = false;
+setNeedsLayout(true);
+}
+void RenderTableSection::clearGrid()
+{
+int rows = m_gridRows;
+while (rows--)
+delete m_grid[rows].row;
+}
+int RenderTableSection::numColumns() const
+{
+int result = 0;
+for (int r = 0; r < m_gridRows; ++r) {
+for (int c = result; c < table()->numEffCols(); ++c) {
+const CellStruct& cell = cellAt(r, c);
+if (cell.cell || cell.inColSpan)
+result = c;
+}
+}
+return result + 1;
+}
+void RenderTableSection::appendColumn(int pos)
+{
+for (int row = 0; row < m_gridRows; ++row) {
+m_grid[row].row->resize(pos + 1);
+CellStruct& c = cellAt(row, pos);
+c.cell = 0;
+c.inColSpan = false;
+}
+}
+void RenderTableSection::splitColumn(int pos, int newSize)
+{
+if (m_cCol > pos)
+m_cCol++;
+for (int row = 0; row < m_gridRows; ++row) {
+m_grid[row].row->resize(newSize);
+Row& r = *m_grid[row].row;
+memmove(r.data() + pos + 1, r.data() + pos, (newSize - 1 - pos) * sizeof(CellStruct));
+r[pos + 1].cell = 0;
+r[pos + 1].inColSpan = r[pos].inColSpan || r[pos].cell;
+}
+}
+RenderObject* RenderTableSection::removeChildNode(RenderObject* child, bool fullRemove)
+{
+setNeedsCellRecalc();
+return RenderContainer::removeChildNode(child, fullRemove);
+}
+// Hit Testing
+bool RenderTableSection::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction action)
+{
+// Table sections cannot ever be hit tested.  Effectively they do not exist.
+// Just forward to our children always.
+tx += m_x;
+ty += m_y;
+for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
+// FIXME: We have to skip over inline flows, since they can show up inside table rows
+// at the moment (a demoted inline <form> for example). If we ever implement a
+// table-specific hit-test method (which we should do for performance reasons anyway),
+// then we can remove this check.
+if (!child->hasLayer() && !child->isInlineFlow() && child->nodeAtPoint(request, result, x, y, tx, ty, action)) {
+updateHitTestResult(result, IntPoint(x - tx, y - ty));
+return true;
+}
+}
+return false;
+}
+#ifndef NDEBUG
+void RenderTableSection::dump(TextStream* stream, DeprecatedString ind) const
+{
+*stream << endl << ind << "grid=(" << m_gridRows << "," << table()->numEffCols() << ")" << endl << ind;
+for (int r = 0; r < m_gridRows; r++) {
+for (int c = 0; c < table()->numEffCols(); c++) {
+if (cellAt(r, c).cell && !cellAt(r, c).inColSpan)
+*stream << "(" << cellAt(r, c).cell->row() << "," << cellAt(r, c).cell->col() << ","
+<< cellAt(r, c).cell->rowSpan() << "," << cellAt(r, c).cell->colSpan() << ") ";
+else
+*stream << cellAt(r, c).cell << "null cell ";
+}
+*stream << endl << ind;
+}
+RenderContainer::dump(stream,ind);
+}
+#endif
+} // namespace WebCore