Method raw_write_wrapped

std/src/console/graphics.rs:451–487

Renders the given text at the current cursor position, with wrapping and scrolling if necessary.

(&mut self, text: String)

    /// Renders the given text at the current cursor position, with wrapping and
    /// scrolling if necessary.
    fn raw_write_wrapped(&mut self, text: String) -> io::Result<()> {
        let mut line_buffer = LineBuffer::from(text);

        loop {
            let fit_chars = self.size_chars.x - self.cursor_pos.x;

            let remaining = line_buffer.split_off(usize::from(fit_chars));
            let len = match u16::try_from(line_buffer.len()) {
                Ok(len) => len,
                Err(_) => return Err(io::Error::new(io::ErrorKind::InvalidInput, "Text too long")),
            };

            if len > 0 {
                let xy = self.cursor_pos.clamped_mul(self.glyph_size);
                let size = SizeInPixels::new(
                    len.clamped_mul(self.glyph_size.width),
                    self.glyph_size.height,
                );

                self.raster_ops.set_draw_color(self.bg_color);
                self.raster_ops.draw_rect_filled(xy, size)?;

                self.raster_ops.set_draw_color(self.fg_color);
                self.raster_ops.write_text(xy, &line_buffer.into_inner())?;
                self.cursor_pos.x += len;
            }

            line_buffer = remaining;
            if line_buffer.is_empty() {
                break;
            } else {
                self.open_line()?;
            }
        }

        Ok(())
    }
}

#[async_trait(?Send)]