renderPlainContainerContent function

String renderPlainContainerContent({ required String content, required int contentHeight, required int targetWidth, required int targetHeight, required int marginLeft, required int marginTop, required int padLeft, required int padTop, required int alignedX, required int alignedY, })

Implementation

String renderPlainContainerContent({
  required String content,
  required int contentHeight,
  required int targetWidth,
  required int targetHeight,
  required int marginLeft,
  required int marginTop,
  required int padLeft,
  required int padTop,
  required int alignedX,
  required int alignedY,
}) {
  final lines = content.split('\n');
  final buffer = StringBuffer();
  final contentX = marginLeft + padLeft + alignedX;
  final contentY = marginTop + padTop + alignedY;
  final blankLine = ' ' * targetWidth;

  for (var y = 0; y < targetHeight; y++) {
    if (y > 0) buffer.write('\n');

    final sourceY = y - contentY;
    if (sourceY < 0 || sourceY >= contentHeight || sourceY >= lines.length) {
      buffer.write(blankLine);
      continue;
    }

    var line = lines[sourceY];
    final maxLineWidth = math.max(0, targetWidth - contentX);
    if (maxLineWidth <= 0) {
      buffer.write(blankLine);
      continue;
    }

    var lineWidth = Layout.visibleLength(line);
    if (lineWidth > maxLineWidth) {
      line = Layout.truncate(line, maxLineWidth, ellipsis: '');
      lineWidth = Layout.visibleLength(line);
    }

    final prefixWidth = contentX.clamp(0, targetWidth);
    final suffixWidth = math.max(0, targetWidth - prefixWidth - lineWidth);
    buffer
      ..write(' ' * prefixWidth)
      ..write(line);
    if (suffixWidth > 0) {
      if (_mayLeaveTerminalStateOpen(line)) {
        buffer.write(_ansiResetStyleForPlainComposition);
      }
      buffer.write(' ' * suffixWidth);
    }
  }

  return buffer.toString();
}