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@@ 1,117 @@
+use crossterm::{
+ cursor,
+ event,
+ execute,
+ style::{Color, Print, ResetColor, SetBackgroundColor, SetForegroundColor},
+ terminal::{self, EnterAlternateScreen, LeaveAlternateScreen},
+ ExecutableCommand, QueueableCommand, Result,
+};
+
+use linefeed::{Interface, ReadResult};
+
+use std::io::{stdout, Write};
+use std::thread;
+use std::time::Duration;
+
+struct App {
+ lines: Vec<String>,
+}
+
+impl App {
+ pub fn new() -> Self {
+ Self {
+ lines: vec![],
+ }
+ }
+
+ pub fn present(&mut self) -> anyhow::Result<()> {
+ let mut stdout = stdout();
+ stdout.queue(cursor::SavePosition)?;
+
+
+ // redraw lines except for prompt
+ let (cols, rows) = terminal::size()?;
+ let mut text_spans = self.lines.iter();
+ for i in 0..(rows - 1) {
+ stdout
+ .queue(cursor::MoveTo(0, i))?
+ .queue(terminal::Clear(terminal::ClearType::CurrentLine))?;
+
+ if let Some(span) = text_spans.next() {
+ stdout.queue(Print(span.clone()))?;
+ }
+ }
+
+ stdout.queue(cursor::RestorePosition)?;
+ Ok(stdout.flush()?)
+ }
+}
+
+
+fn main() -> anyhow::Result<()> {
+
+ //crossterm::terminal::enable_raw_mode()?;
+
+ stdout()
+ .execute(EnterAlternateScreen)?
+ .execute(SetForegroundColor(Color::Blue))?
+ .execute(SetBackgroundColor(Color::Red))?
+ .execute(Print("oh my word"))?
+ .execute(ResetColor)?;
+
+ let (cols, rows) = terminal::size()?;
+
+ let mut app = App::new();
+
+ let mut reader = Interface::new("app")?;
+ reader.set_prompt("my-app > ")?;
+ reader.ignore_signal(linefeed::terminal::Signal::Interrupt);
+
+ let step = Some(Duration::from_millis(1000 / 60));
+
+ //while let ReadResult::Input(input) = reader.read_line_step(step)? {
+ loop {
+ match reader.read_line_step(step)? {
+ Some(ReadResult::Input(input)) => {
+ if input == "quit" { break }
+
+ reader.add_history(input.clone());
+
+ app.lines.push(input.clone());
+ app.present()?;
+ },
+
+ _ => { app.present()?; continue; }
+ }
+ }
+ //loop {
+ // if event::poll(Duration::from_millis(1000 / 60))? {
+ // match event::read()? {
+ // event::Event::Key(event) => {
+ // if event.code == event::KeyCode::Enter {
+ // break;
+ // }
+ // },
+
+ // _ => { /* dont care */ },
+ // }
+ // }
+ //}
+
+ stdout()
+ .execute(LeaveAlternateScreen)?;
+ crossterm::terminal::disable_raw_mode()?;
+ Ok(())
+
+
+// let mut reader = Interface::new("my-application")?;
+// reader.set_prompt("cmd > ")?;
+//
+// while let ReadResult::Input(input) = reader.read_line()? {
+// println!("got input {:?}", input);
+//
+// if input.starts_with("quit") { break }
+// }
+//
+// println!("goodbye"); Ok(())
+}