draw method

void draw(CanvasBuffer buffer, Rect bounds, void drawChild(CanvasBuffer buffer, Rect bounds))

Draws the border on the provided buffer within the given bounds.

Calls drawChild to render the content inside the border with adjusted inner bounds (shrinked by 1 on all sides).

The border uses the specified style characters and applies the borderColor as foreground or background color.

Implementation

void draw(
  CanvasBuffer buffer,
  Rect bounds,
  void Function(CanvasBuffer buffer, Rect bounds) drawChild,
) {
  final x = bounds.x;
  final y = bounds.y;
  final width = bounds.width;
  final height = bounds.height;
  TextComponentStyle borderStyle;

  borderStyle = TextComponentStyle();

  if (borderColor != null) {
    borderStyle = borderStyle.foreground(borderColor!);
    if (style == BorderStyle.empty) {
      borderStyle = borderStyle.background(borderColor!);
    }
  }

  // Top border
  buffer.drawAt(x, y, style.topLeft, borderStyle);
  buffer.drawAt(bounds.right - 1, y, style.topRight, borderStyle);
  for (int i = 1; i < width - 1; i++) {
    buffer.drawAt(x + i, y, style.horizontal, borderStyle);
  }

  // Bottom border
  buffer.drawAt(x, bounds.bottom - 1, style.bottomLeft, borderStyle);
  buffer.drawAt(
    bounds.right - 1,
    bounds.bottom - 1,
    style.bottomRight,
    borderStyle,
  );
  for (int i = 1; i < width - 1; i++) {
    buffer.drawAt(x + i, bounds.bottom - 1, style.horizontal, borderStyle);
  }

  // Side border
  for (int i = 1; i < height - 1; i++) {
    buffer.drawAt(x, y + i, style.vertical, borderStyle);
    buffer.drawAt(bounds.right - 1, y + i, style.vertical, borderStyle);
  }

  final Rect innerBounds = Rect(
    x: x + 1,
    y: y + 1,
    width: width - 2,
    height: height - 2,
  );

  drawChild(buffer, innerBounds);
}