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use crossterm::{
event::{DisableMouseCapture, EnableMouseCapture},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::io;
use tui::{
backend::{Backend, CrosstermBackend},
layout::{Alignment, Constraint, Direction, Layout},
widgets::{List, ListItem, Paragraph, Widget},
Frame, Terminal,
};
use crate::Calculator;
impl Calculator {
pub fn draw<B: Backend>(&self, f: &mut Frame<B>) {
let chunks = layout(self.stack.len()).split(f.size());
f.render_widget(version_number_widget(), chunks[0]);
f.render_widget(stack_widget(&self.stack), chunks[2]);
f.render_widget(Paragraph::new(self.input_buffer.as_str()), chunks[3]);
}
}
pub fn init_terminal() -> Result<Terminal<CrosstermBackend<io::Stdout>>, io::Error> {
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
Terminal::new(backend)
}
pub fn cleanup_terminal<B>(mut terminal: Terminal<B>) -> Result<(), io::Error>
where
B: Backend + io::Write,
{
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture,
)?;
terminal.show_cursor()?;
Ok(())
}
fn layout(stack_size: usize) -> Layout {
Layout::default()
.direction(Direction::Vertical)
.constraints(
[
Constraint::Length(1),
Constraint::Max(u16::MAX),
Constraint::Length(stack_size as u16),
Constraint::Length(1),
]
.as_ref(),
)
}
fn stack_widget(stack: &Vec<f64>) -> impl Widget {
List::new(
stack
.iter()
.map(|f| ListItem::new(format!("{}", f)))
.collect::<Vec<ListItem>>(),
)
}
fn version_number_widget() -> impl Widget {
Paragraph::new(format!("pfc-{}", option_env!("CARGO_PKG_VERSION").unwrap()))
.alignment(Alignment::Center)
}
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