protected override void performLayout()
{
int rows = this.rows;
int columns = this.columns;
D.assert(this._children.Count == rows * columns);
if (rows * columns == 0)
{
this.size = this.constraints.constrain(new Size(0.0f, 0.0f));
return;
}
List <float> widths = this._computeColumnWidths(this.constraints);
List <float> positions = new List <float>();
float tableWidth = 0.0f;
positions.Add(0.0f);
for (int x = 1; x < columns; x++)
{
positions.Add(positions[x - 1] + widths[x - 1]);
}
this._columnLefts = positions;
tableWidth = positions.Last() + widths.Last();
D.assert(!positions.Any((float value) => { return(value == null); }));
this._rowTops.Clear();
this._baselineDistance = null;
float rowTop = 0.0f;
for (int y = 0; y < rows; y++)
{
this._rowTops.Add(rowTop);
float rowHeight = 0.0f;
bool haveBaseline = false;
float beforeBaselineDistance = 0.0f;
float afterBaselineDistance = 0.0f;
List <float?> baselines = new List <float?>();
for (int i = 0; i < columns; i++)
{
baselines.Add(null);
}
for (int x = 0; x < columns; x++)
{
int xy = x + y * columns;
RenderBox child = this._children[xy];
if (child != null)
{
TableCellParentData childParentData = (TableCellParentData)child.parentData;
D.assert(childParentData != null);
childParentData.x = x;
childParentData.y = y;
switch (childParentData.verticalAlignment ?? this.defaultVerticalAlignment)
{
case TableCellVerticalAlignment.baseline: {
D.assert(this.textBaseline != null);
child.layout(BoxConstraints.tightFor(width: widths[x]), parentUsesSize: true);
float?childBaseline =
child.getDistanceToBaseline(this.textBaseline.Value, onlyReal: true);
if (childBaseline != null)
{
beforeBaselineDistance = Mathf.Max(beforeBaselineDistance, childBaseline.Value);
afterBaselineDistance = Mathf.Max(afterBaselineDistance,
child.size.height - childBaseline.Value);
baselines[x] = childBaseline.Value;
haveBaseline = true;
}
else
{
rowHeight = Mathf.Max(rowHeight, child.size.height);
childParentData.offset = new Offset(positions[x], rowTop);
}
break;
}
case TableCellVerticalAlignment.top:
case TableCellVerticalAlignment.middle:
case TableCellVerticalAlignment.bottom: {
child.layout(BoxConstraints.tightFor(width: widths[x]), parentUsesSize: true);
rowHeight = Mathf.Max(rowHeight, child.size.height);
break;
}
case TableCellVerticalAlignment.fill: {
break;
}
}
}
}
if (haveBaseline)
{
if (y == 0)
{
this._baselineDistance = beforeBaselineDistance;
}
rowHeight = Mathf.Max(rowHeight, beforeBaselineDistance + afterBaselineDistance);
}
for (int x = 0; x < columns; x++)
{
int xy = x + y * columns;
RenderBox child = this._children[xy];
if (child != null)
{
TableCellParentData childParentData = (TableCellParentData)child.parentData;
switch (childParentData.verticalAlignment ?? this.defaultVerticalAlignment)
{
case TableCellVerticalAlignment.baseline: {
if (baselines[x] != null)
{
childParentData.offset = new Offset(positions[x],
rowTop + beforeBaselineDistance - baselines[x].Value);
}
break;
}
case TableCellVerticalAlignment.top: {
childParentData.offset = new Offset(positions[x], rowTop);
break;
}
case TableCellVerticalAlignment.middle: {
childParentData.offset = new Offset(positions[x],
rowTop + (rowHeight - child.size.height) / 2.0f);
break;
}
case TableCellVerticalAlignment.bottom: {
childParentData.offset =
new Offset(positions[x], rowTop + rowHeight - child.size.height);
break;
}
case TableCellVerticalAlignment.fill: {
child.layout(BoxConstraints.tightFor(width: widths[x], height: rowHeight));
childParentData.offset = new Offset(positions[x], rowTop);
break;
}
}
}
}
rowTop += rowHeight;
}
this._rowTops.Add(rowTop);
this.size = this.constraints.constrain(new Size(tableWidth, rowTop));
D.assert(this._rowTops.Count == rows + 1);
}
static float _boxBaseline(RenderBox box, TextBaseline baseline)
{
return(box.getDistanceToBaseline(baseline) ?? 0.0f);
}
static double _boxBaseline(RenderBox box, TextBaseline baseline)
{
return(box.getDistanceToBaseline(baseline) ?? 0.0);
}