performVerticalIntrinsicLayout method

@override AxisConfiguration<int> performVerticalIntrinsicLayout({ required Map<int, double> childrenHeights, required Map<int, double> childrenBaselines, bool isComputingIntrinsics = false, })

Implementation

@override
AxisConfiguration<int> performVerticalIntrinsicLayout({
  required Map<int, double> childrenHeights,
  required Map<int, double> childrenBaselines,
  bool isComputingIntrinsics = false,
}) {
  final childHeights = List.generate(
    cols * rows,
    (index) => childrenBaselines[index] ?? 0.0,
    growable: false,
  );
  final childDepth = List.generate(cols * rows, (index) {
    final height = childrenBaselines[index];
    return height != null ? childrenHeights[index]! - height : 0.0;
  }, growable: false);

  // Calculate height and depth for each row
  // Minimum height and depth are 0.7 * arrayskip and 0.3 * arrayskip
  final rowHeights = List.filled(rows, 0.7 * arrayskip, growable: false);
  final rowDepth = List.filled(rows, 0.3 * arrayskip, growable: false);
  for (var i = 0; i < rows; i++) {
    for (var j = 0; j < cols; j++) {
      rowHeights[i] = math.max(
        rowHeights[i],
        childHeights[i * cols + j],
      );
      rowDepth[i] = math.max(
        rowDepth[i],
        childDepth[i * cols + j],
      );
    }
  }

  // Layout rows
  var pos = 0.0;
  final rowBaselinePos = List.filled(rows, 0.0, growable: false);
  final hLinePos = List.filled(rows + 1, 0.0, growable: false);

  for (var i = 0; i < rows; i++) {
    hLinePos[i] = pos;
    pos += (hLines[i] != MatrixSeparatorStyle.none) ? ruleThickness : 0.0;
    pos += rowHeights[i];
    rowBaselinePos[i] = pos;
    pos += rowDepth[i];
    pos += i < rows - 1 ? rowSpacings[i] : 0;
  }
  hLinePos[rows] = pos;
  pos += (hLines[rows] != MatrixSeparatorStyle.none) ? ruleThickness : 0.0;

  totalHeight = pos;

  // Calculate position for each children
  final childPos = List.generate(rows * cols, (index) {
    final row = index ~/ cols;
    return rowBaselinePos[row] - childHeights[index];
  }, growable: false);

  if (!isComputingIntrinsics) {
    this.hLinePos = hLinePos;
  }

  return AxisConfiguration(
    size: totalHeight,
    offsetTable: childPos.asMap(),
  );
}