void FixedTableLayout::calcPrefWidths(int& minWidth, int& maxWidth)
{
// FIXME: This entire calculation is incorrect for both minwidth and maxwidth.
// we might want to wait until we have all of the first row before
// layouting for the first time.
// only need to calculate the minimum width as the sum of the
// cols/cells with a fixed width.
//
// The maximum width is max(minWidth, tableWidth).
int bs = m_table->bordersPaddingAndSpacing();
int tableWidth = m_table->style()->width().isFixed() ? m_table->style()->width().value() - bs : 0;
int mw = calcWidthArray(tableWidth) + bs;
minWidth = max(mw, tableWidth);
maxWidth = minWidth;
}
void FixedTableLayout::calcPrefWidths(int& minWidth, int& maxWidth)
{
// FIXME: This entire calculation is incorrect for both minwidth and maxwidth.
// we might want to wait until we have all of the first row before
// layouting for the first time.
// only need to calculate the minimum width as the sum of the
// cols/cells with a fixed width.
//
// The maximum width is max(minWidth, tableWidth).
int bs = m_table->bordersPaddingAndSpacing();
int tableWidth = m_table->style()->width().isFixed() ? m_table->style()->width().value() - bs : 0;
int mw = calcWidthArray(tableWidth) + bs;
minWidth = max(mw, tableWidth);
maxWidth = minWidth;
// This quirk is very similar to one that exists in RenderBlock::calcBlockPrefWidths().
// Here's the example for this one:
/*
<table style="width:100%; background-color:red"><tr><td>
<table style="background-color:blue"><tr><td>
<table style="width:100%; background-color:green; table-layout:fixed"><tr><td>
Content
</td></tr></table>
</td></tr></table>
</td></tr></table>
*/
// In this example, the two inner tables should be as large as the outer table.
// We can achieve this effect by making the maxwidth of fixed tables with percentage
// widths be infinite.
if (m_table->document()->inQuirksMode() && m_table->style()->width().isPercent()
&& maxWidth < TABLE_MAX_WIDTH)
maxWidth = TABLE_MAX_WIDTH;
}
void FixedTableLayout::layout()
{
int tableLogicalWidth = m_table->logicalWidth() - m_table->bordersPaddingAndSpacingInRowDirection();
unsigned nEffCols = m_table->numEffCols();
// FIXME: It is possible to be called without having properly updated our internal representation.
// This means that our preferred logical widths were not recomputed as expected.
if (nEffCols != m_width.size()) {
calcWidthArray();
// FIXME: Table layout shouldn't modify our table structure (but does due to columns and column-groups).
nEffCols = m_table->numEffCols();
}
Vector<int> calcWidth(nEffCols, 0);
unsigned numAuto = 0;
unsigned autoSpan = 0;
int totalFixedWidth = 0;
int totalPercentWidth = 0;
float totalPercent = 0;
// Compute requirements and try to satisfy fixed and percent widths.
// Percentages are of the table's width, so for example
// for a table width of 100px with columns (40px, 10%), the 10% compute
// to 10px here, and will scale up to 20px in the final (80px, 20px).
for (unsigned i = 0; i < nEffCols; i++) {
if (m_width[i].isFixed()) {
calcWidth[i] = m_width[i].value();
totalFixedWidth += calcWidth[i];
} else if (m_width[i].isPercentNotCalculated()) {
calcWidth[i] = valueForLength(m_width[i], tableLogicalWidth);
totalPercentWidth += calcWidth[i];
totalPercent += m_width[i].percent();
} else if (m_width[i].isAuto()) {
numAuto++;
autoSpan += m_table->spanOfEffCol(i);
}
}
int hspacing = m_table->hBorderSpacing();
int totalWidth = totalFixedWidth + totalPercentWidth;
if (!numAuto || totalWidth > tableLogicalWidth) {
// If there are no auto columns, or if the total is too wide, take
// what we have and scale it to fit as necessary.
if (totalWidth != tableLogicalWidth) {
// Fixed widths only scale up
if (totalFixedWidth && totalWidth < tableLogicalWidth) {
totalFixedWidth = 0;
for (unsigned i = 0; i < nEffCols; i++) {
if (m_width[i].isFixed()) {
calcWidth[i] = calcWidth[i] * tableLogicalWidth / totalWidth;
totalFixedWidth += calcWidth[i];
}
}
}
if (totalPercent) {
totalPercentWidth = 0;
for (unsigned i = 0; i < nEffCols; i++) {
if (m_width[i].isPercentNotCalculated()) {
calcWidth[i] = m_width[i].percent() * (tableLogicalWidth - totalFixedWidth) / totalPercent;
totalPercentWidth += calcWidth[i];
}
}
}
totalWidth = totalFixedWidth + totalPercentWidth;
}
} else {
// Divide the remaining width among the auto columns.
ASSERT(autoSpan >= numAuto);
int remainingWidth = tableLogicalWidth - totalFixedWidth - totalPercentWidth - hspacing * (autoSpan - numAuto);
int lastAuto = 0;
for (unsigned i = 0; i < nEffCols; i++) {
if (m_width[i].isAuto()) {
unsigned span = m_table->spanOfEffCol(i);
int w = remainingWidth * span / autoSpan;
calcWidth[i] = w + hspacing * (span - 1);
remainingWidth -= w;
if (!remainingWidth)
break;
lastAuto = i;
numAuto--;
ASSERT(autoSpan >= span);
autoSpan -= span;
}
}
// Last one gets the remainder.
if (remainingWidth)
calcWidth[lastAuto] += remainingWidth;
totalWidth = tableLogicalWidth;
}
if (totalWidth < tableLogicalWidth) {
// Spread extra space over columns.
int remainingWidth = tableLogicalWidth - totalWidth;
int total = nEffCols;
while (total) {
int w = remainingWidth / total;
remainingWidth -= w;
calcWidth[--total] += w;
}
if (nEffCols > 0)
calcWidth[nEffCols - 1] += remainingWidth;
}
int pos = 0;
for (unsigned i = 0; i < nEffCols; i++) {
m_table->setColumnPosition(i, pos);
pos += calcWidth[i] + hspacing;
}
int colPositionsSize = m_table->columnPositions().size();
if (colPositionsSize > 0)
m_table->setColumnPosition(colPositionsSize - 1, pos);
}
void FixedTableLayout::computeIntrinsicLogicalWidths(LayoutUnit& minWidth, LayoutUnit& maxWidth)
{
minWidth = maxWidth = calcWidthArray();
}
void TableLayoutAlgorithmFixed::computeIntrinsicLogicalWidths(LayoutUnit& minWidth, LayoutUnit& maxWidth)
{
minWidth = maxWidth = LayoutUnit(calcWidthArray());
}
