use crate::x::*;

use std::ffi::CString;
use std::sync::Arc;

use x11::xft::{
  XftColor,
  XftDraw,
  XftDrawStringUtf8,
  XftFontOpenName,
};


pub struct Font {
  display: Arc<Display>,
  font_state: *mut x11::xft::XftFont,
}


impl Font {
  pub fn new(display: Arc<Display>, name: &str) -> xcb::Result<Font> {
    let xlib_display = display.connection().get_xlib_display();
    let screen_index = display.screen_index();

    let name = CString::new(name).unwrap();
    let font_state = unsafe {
      XftFontOpenName(xlib_display, screen_index, name.as_ptr().cast())
    };

    Ok(Font { display, font_state })
  }

  pub fn draw(&self, context: &FontGraphicContext, xft_color: &XftColor,
	      x: i32, y: i32, text: &str)
    -> xcb::Result<()>
  {
    let xft_draw = context.get_xft_draw();
    let text = CString::new(text).unwrap();
    unsafe {
      XftDrawStringUtf8(xft_draw, xft_color, self.font_state, x, y,
                        text.as_ptr().cast(), text.count_bytes() as i32)
    };

    Ok(())
  }
}