paint method

@override String paint()

Implementation

@override
String paint() {
  final child = _child;
  String content;
  if (child == null) {
    content = '';
  } else {
    final canReuseChild =
        _lastChildPaint != null &&
        identical(_lastChildPaintTarget, child) &&
        _lastChildPaintSize == child.size &&
        !child.paintDirty;
    if (canReuseChild) {
      content = _lastChildPaint!;
    } else {
      content = child.paint();
      _lastChildPaint = content;
      _lastChildPaintTarget = child;
      _lastChildPaintSize = child.size;
    }
  }
  final widthForPaint = (_resolvedWidth ?? width) ?? size.width.toInt();
  final heightForPaint = (_resolvedHeight ?? height) ?? size.height.toInt();
  final key = (
    content,
    padding,
    margin,
    widthForPaint,
    heightForPaint,
    background,
    foreground,
    color,
    decoration,
    foregroundDecoration,
    alignment,
    align,
    verticalAlign,
  );

  final cached = _lastPaint;
  if (cached != null && _lastPaintKey == key) return cached;

  final rendered = _renderContainerContent(
    contentStr: content,
    padding: padding,
    margin: margin,
    width: widthForPaint,
    height: heightForPaint,
    background: background,
    foreground: foreground,
    color: color,
    decoration: decoration,
    foregroundDecoration: foregroundDecoration,
    alignment: alignment,
    align: align,
    verticalAlign: verticalAlign,
  );
  _lastPaint = rendered;
  _lastPaintKey = key;
  return rendered;
}