Textbox.cpp

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#include <Canvas.h>
#include "Canvas/Element/Textbox.hh"

int
Textbox::putchar(char c)
{
  // Save the current context and setup our context
  Canvas::Context* saved = m_canvas->set_context(this);

  // Handle some special characters, line-feed
  uint16_t x, y;
  get_cursor(x, y);
  uint8_t scale = m_text_scale;
  uint16_t width = (x + (scale * (m_font->WIDTH + m_font->SPACING)) - m_text_port.x);
  if ((c == '\n') || (width > m_text_port.width)) {
    uint16_t font_height = scale * (m_font->HEIGHT);
    uint16_t line_height = scale * (m_font->HEIGHT + m_font->LINE_SPACING);
    uint16_t y = m_cursor.y + line_height;
    if (y + font_height > m_text_port.y + m_text_port.height) {
      y = m_text_port.y;
    }
    x = m_text_port.x;
    Canvas::color16_t saved = set_pen_color(get_canvas_color());
    set_cursor(x, y);
    m_canvas->fill_rect(m_text_port.width, line_height);
    set_pen_color(saved);
  }

  // Carriage return
  else if (c == '\r') {
    set_cursor(m_text_port.x, y);
  }

  // Form-feed
  else if (c == '\f') {
    Canvas::color16_t saved = set_pen_color(get_canvas_color());
    set_cursor(m_text_port.x, m_text_port.y);
    m_canvas->fill_rect(m_text_port.width, m_text_port.height);
    set_pen_color(saved);
  }

  // Draw other characters
  else m_canvas->draw_char(c);

  // Restore the previous canvas state; context
  m_canvas->set_context(saved);
  return (c);
}