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|
use crate::{
cli::Args,
registers::RegistersData,
trace::{trace, trace_kill, trace_next},
};
use crossterm::{
event::{self, Event, KeyCode},
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
ExecutableCommand,
};
use nix::{sys::wait::waitpid, unistd::Pid};
use ratatui::{prelude::*, widgets::*};
use std::io::{self, stdout};
pub struct UI {
height: usize,
max_lines: usize,
scroll: usize,
lines: Vec<RegistersData>,
}
impl UI {
pub fn new() -> UI {
UI {
height: 0,
max_lines: 0,
scroll: 0,
lines: vec![],
}
}
pub fn add_line(&mut self, registers: RegistersData) {
self.lines.push(registers);
self.max_lines = self.lines.len() + 1;
}
pub fn get_paragraph(&mut self, pid: Pid) -> Paragraph {
let mut lines: Vec<Line> = vec![];
for line in &mut self.lines {
lines.push(line.output_ui(pid));
}
let paragraph = Paragraph::new(lines)
.block(
Block::default()
.border_style(Style::default().fg(Color::Yellow))
.title(format!("[{pid}]"))
.title(
block::Title::from(format!(
"[lines {}-{}]",
self.scroll,
self.scroll + self.height
))
.position(block::Position::Bottom)
.alignment(Alignment::Right),
)
.borders(Borders::ALL),
)
.scroll((self.scroll as u16, 0));
paragraph
}
pub fn start(&mut self, pid: Pid, args: &Args) -> anyhow::Result<()> {
enable_raw_mode()?;
stdout().execute(EnterAlternateScreen)?;
let mut terminal = Terminal::new(CrosstermBackend::new(stdout()))?;
let mut have_to_print = true;
let mut have_to_trace = args.command.is_none();
let mut should_quit = false;
if args.command.is_some() {
let registers = trace(pid, args)?;
for register in registers {
self.add_line(register);
}
} else {
// First wait for the parent process
_ = waitpid(pid, None)?;
}
let filters: Vec<&str> = match &args.filter {
Some(filter) => filter.split(',').collect::<Vec<&str>>(),
None => vec![],
};
while !should_quit {
if have_to_trace {
if let Some(reg) = trace_next(pid)? {
have_to_print ^= true;
if have_to_print {
if !filters.is_empty() && !filters.contains(®.name()) {
continue;
}
self.add_line(reg);
}
} else {
have_to_trace = false;
}
}
self.height = terminal.get_frame().area().height as usize;
terminal.draw(|frame| {
let size = frame.area();
frame.render_widget(self.get_paragraph(pid), size);
})?;
should_quit = handle_events(self)?;
}
// FIXME: avoid this kill without Rust errors
let _ = trace_kill(pid);
disable_raw_mode()?;
stdout().execute(LeaveAlternateScreen)?;
Ok(())
}
}
fn handle_events(ui: &mut UI) -> io::Result<bool> {
if event::poll(std::time::Duration::from_millis(50))? {
if let Event::Key(key) = event::read()? {
if key.kind == event::KeyEventKind::Press {
match key.code {
KeyCode::Char('q') => {
return Ok(true);
}
KeyCode::Char('j') | KeyCode::Down => {
if ui.scroll < (ui.max_lines - ui.height + 1) {
ui.scroll += 1;
}
}
KeyCode::Char('J') | KeyCode::Char('G') => {
ui.scroll = ui.max_lines - ui.height + 1;
}
KeyCode::Char('k') | KeyCode::Up => {
if ui.scroll > 1 {
ui.scroll -= 1;
}
}
KeyCode::Char('K') | KeyCode::Char('0') => {
ui.scroll = 1;
}
_ => {}
}
}
}
}
Ok(false)
}
|
