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use {
crate::{
app::AppContext,
conf::Conf,
errors::ProgramError,
},
crossterm::{
cursor,
terminal::{Clear, ClearType},
QueueableCommand,
},
super::W,
termimad::Area,
};
pub struct Screen {
pub width: u16,
pub height: u16,
}
impl Screen {
pub fn new(con: &AppContext, _conf: &Conf) -> Result<Screen, ProgramError> {
let mut screen = Screen {
width: 0,
height: 0,
};
screen.read_size(con)?;
Ok(screen)
}
pub fn set_terminal_size(&mut self, w: u16, h: u16, con: &AppContext) {
self.width = w;
self.height = h;
if let Some(h) = con.launch_args.height {
self.height = h;
}
}
pub fn read_size(&mut self, con: &AppContext) -> Result<(), ProgramError> {
let (w, h) = termimad::terminal_size();
self.set_terminal_size(w, h, con);
Ok(())
}
/// move the cursor to x,y
pub fn goto(&self, w: &mut W, x: u16, y: u16) -> Result<(), ProgramError> {
w.queue(cursor::MoveTo(x, y))?;
Ok(())
}
/// clear from the cursor to the end of line
pub fn clear_line(&self, w: &mut W) -> Result<(), ProgramError> {
w.queue(Clear(ClearType::UntilNewLine))?;
Ok(())
}
/// clear the area and everything to the right.
/// Should be used with parcimony as it could lead to flickering.
pub fn clear_area_to_right(&self, w: &mut W, area: &Area) -> Result<(), ProgramError> {
for y in area.top..area.top+area.height {
self.goto(w, area.left, y)?;
self.clear_line(w)?;
}
Ok(())
}
}
|
