rendertablesection.cpp

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        m_rowPos[r + 1] = max(m_rowPos[r + 1], m_rowPos[r]);
    }

#ifndef NDEBUG
    setNeedsLayoutIsForbidden(false);
#endif

    ASSERT(!needsLayout());

    statePusher.pop();

    return m_rowPos[m_gridRows];
}

void RenderTableSection::layout()
{
    ASSERT(needsLayout());

    LayoutStateMaintainer statePusher(view(), this, IntSize(x(), y()));
    for (RenderObject* child = children()->firstChild(); child; child = child->nextSibling()) {
        if (child->isTableRow()) {
            child->layoutIfNeeded();
            ASSERT(!child->needsLayout());
        }
    }
    statePusher.pop();
    setNeedsLayout(false);
}

int RenderTableSection::layoutRows(int toAdd)
{
#ifndef NDEBUG
    setNeedsLayoutIsForbidden(true);
#endif

    ASSERT(!needsLayout());

    int rHeight;
    int rindx;
    int totalRows = m_gridRows;
    
    // Set the width of our section now.  The rows will also be this width.
    setWidth(table()->contentWidth());
    m_overflowLeft = 0;
    m_overflowWidth = width();
    m_overflowTop = 0;
    m_overflowHeight = 0;
    m_hasOverflowingCell = false;

    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();

    LayoutStateMaintainer statePusher(view(), this, IntSize(x(), y()));

    for (int r = 0; r < totalRows; r++) {
        // Set the row's x/y position and width/height.
        if (RenderTableRow* rowRenderer = m_grid[r].rowRenderer) {
            rowRenderer->setLocation(0, m_rowPos[r]);
            rowRenderer->setWidth(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->isBox() && toRenderBox(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.
                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 oldTe = cell->intrinsicPaddingTop();
            int oldBe = cell->intrinsicPaddingBottom();
            int heightWithoutIntrinsicPadding = cell->height() - oldTe - oldBe;
            
            int te = 0;
            switch (cell->style()->verticalAlign()) {
                case SUB:
                case SUPER:
                case TEXT_TOP:
                case TEXT_BOTTOM:
                case BASELINE: {
                    int b = cell->baselinePosition();
                    if (b > cell->borderTop() + cell->paddingTop())
                        te = getBaseline(r) - (b - oldTe);
                    break;
                }
                case TOP:
                    te = 0;
                    break;
                case MIDDLE:
                    te = (rHeight - heightWithoutIntrinsicPadding) / 2;
                    break;
                case BOTTOM:
                    te = rHeight - heightWithoutIntrinsicPadding;
                    break;
                default:
                    break;
            }
            
            int be = rHeight - heightWithoutIntrinsicPadding - te;
            cell->setIntrinsicPaddingTop(te);
            cell->setIntrinsicPaddingBottom(be);
            if (te != oldTe || be != oldBe) {
                cell->setNeedsLayout(true, false);
                cell->layoutIfNeeded();
            }

            if ((te != oldTe || be > oldBe) && !table()->selfNeedsLayout() && cell->checkForRepaintDuringLayout())
                cell->repaint();
            
            IntRect oldCellRect(cell->x(), cell->y() , cell->width(), cell->height());
        
            if (style()->direction() == RTL) {
                cell->setLocation(table()->columnPositions()[nEffCols] - table()->columnPositions()[table()->colToEffCol(cell->col() + cell->colSpan())] + hspacing, m_rowPos[rindx]);
            } else
                cell->setLocation(table()->columnPositions()[c] + hspacing, m_rowPos[rindx]);

            m_overflowLeft = min(m_overflowLeft, cell->x() + cell->overflowLeft(false));
            m_overflowWidth = max(m_overflowWidth, cell->x() + cell->overflowWidth(false));
            m_overflowTop = min(m_overflowTop, cell->y() + cell->overflowTop(false));
            m_overflowHeight = max(m_overflowHeight, cell->y() + 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);
        }
    }

#ifndef NDEBUG
    setNeedsLayoutIsForbidden(false);
#endif

    ASSERT(!needsLayout());

    statePusher.pop();

    setHeight(m_rowPos[totalRows]);
    m_overflowHeight = max(m_overflowHeight, height());
    return height();
}

int RenderTableSection::lowestPosition(bool includeOverflowInterior, bool includeSelf) const
{
    int bottom = RenderBox::lowestPosition(includeOverflowInterior, includeSelf);
    if (!includeOverflowInterior && hasOverflowClip())
        return bottom;

    for (RenderObject* row = firstChild(); row; row = row->nextSibling()) {
        for (RenderObject* curr = row->firstChild(); curr; curr = curr->nextSibling()) {
            if (curr->isTableCell()) {
                RenderTableCell* cell = static_cast<RenderTableCell*>(curr);
                bottom = max(bottom, cell->y() + cell->lowestPosition(false));
            }
        }
    }
    
    return bottom;
}

int RenderTableSection::rightmostPosition(bool includeOverflowInterior, bool includeSelf) const
{
    int right = RenderBox::rightmostPosition(includeOverflowInterior, includeSelf);
    if (!includeOverflowInterior && hasOverflowClip())
        return right;

    for (RenderObject* row = firstChild(); row; row = row->nextSibling()) {
        for (RenderObject* curr = row->firstChild(); curr; curr = curr->nextSibling()) {
            if (curr->isTableCell()) {
                RenderTableCell* cell = static_cast<RenderTableCell*>(curr);
                right = max(right, cell->x() + cell->rightmostPosition(false));
            }
        }
    }
    
    return right;
}

int RenderTableSection::leftmostPosition(bool includeOverflowInterior, bool includeSelf) const
{
    int left = RenderBox::leftmostPosition(includeOverflowInterior, includeSelf);
    if (!includeOverflowInterior && hasOverflowClip())
        return left;
    
    for (RenderObject* row = firstChild(); row; row = row->nextSibling()) {
        for (RenderObject* curr = row->firstChild(); curr; curr = curr->nextSibling()) {
            if (curr->isTableCell()) {
                RenderTableCell* cell = static_cast<RenderTableCell*>(curr);
                left = min(left, cell->x() + 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)