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use super::*;
use crate::util::{Result, WASH_CMD_INFO, WASH_LOG_INFO};
use log::{debug, error, info};
use std::sync::{mpsc::Sender, Arc, Mutex};
use structopt::StructOpt;
use termion::event::Key;
use termion::{raw::RawTerminal, screen::AlternateScreen};
use tui::{
layout::{Constraint, Direction, Layout},
Terminal,
};
type ReplTermionBackend =
tui::backend::TermionBackend<AlternateScreen<RawTerminal<std::io::Stdout>>>;
const REPL_INIT: &str = " REPL (Initializing...) ";
#[derive(Debug, Clone, PartialEq)]
pub(crate) struct InputState {
pub(crate) history: Vec<Vec<char>>,
pub(crate) history_cursor: usize,
pub(crate) input: Vec<char>,
pub(crate) input_cursor: usize,
pub(crate) multiline_history: u16, // amount to offset cursor for multiline inputs
pub(crate) input_width: usize,
pub(crate) focused: bool,
pub(crate) title: String,
}
impl Default for InputState {
fn default() -> Self {
InputState {
history: vec![],
history_cursor: 0,
input: vec![],
input_cursor: 0,
multiline_history: 0,
input_width: 40,
focused: true,
title: REPL_INIT.to_string(),
}
}
}
impl InputState {
pub(crate) fn cursor_location(&self) -> (u16, u16) {
let mut position = (0, 0);
position.0 += WASH_PROMPT.len();
for _c in 0..self.input_cursor {
position.0 += 1;
if position.0 == self.input_width {
position.0 = 0;
position.1 += 1;
}
}
// Offset Y by length of command history and multiline history
position.1 += self.history.len();
//TODO(issue #90): Multiline history is calculated relative to the current terminal width
// when a terminal is resized, it needs to be re-evaluated
position.1 += self.multiline_history as usize;
(position.0 as u16, position.1 as u16)
}
}
#[derive(Debug, Clone)]
pub(crate) struct OutputState {
pub(crate) output: Vec<String>,
pub(crate) output_cursor: usize,
pub(crate) output_width: usize,
pub(crate) output_scroll: u16,
}
impl Default for OutputState {
fn default() -> Self {
OutputState {
output: vec![],
output_cursor: 0,
output_width: 80,
output_scroll: 0,
}
}
}
#[derive(Debug, Clone, Copy, PartialEq)]
pub(crate) enum ReplMode {
Standalone,
Lattice,
}
#[derive(Debug, Clone)]
pub(crate) struct EmbeddedHost {
pub(crate) id: String,
pub(crate) mode: ReplMode,
pub(crate) op_sender: Sender<CtlCliCommand>,
}
impl EmbeddedHost {
pub(crate) fn new(id: String, mode: ReplMode, op_sender: Sender<CtlCliCommand>) -> Self {
EmbeddedHost {
id,
mode,
op_sender,
}
}
}
pub(crate) struct WashRepl {
pub(crate) input_state: InputState,
pub(crate) output_state: Arc<Mutex<OutputState>>,
pub(crate) tui_state: TuiWidgetState,
pub(crate) embedded_host: Option<EmbeddedHost>,
}
impl Default for WashRepl {
fn default() -> Self {
WashRepl {
input_state: InputState::default(),
output_state: Arc::new(Mutex::new(OutputState::default())),
tui_state: TuiWidgetState::new(),
embedded_host: None,
}
}
}
impl WashRepl {
/// Using the state of the REPL, display information in the terminal window
pub(crate) fn draw_ui(&mut self, terminal: &mut Terminal<ReplTermionBackend>) -> Result<()> {
terminal.draw(|frame| {
let main_chunks = Layout::default()
.direction(Direction::Vertical)
.constraints([Constraint::Percentage(67), Constraint::Min(5)].as_ref())
.split(frame.size());
let io_chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(40), Constraint::Min(10)])
.split(main_chunks[0]);
draw_input_panel(frame, &mut self.input_state, io_chunks[0]);
draw_output_panel(
frame,
Arc::clone(&self.output_state),
io_chunks[1],
self.input_state.focused,
);
draw_smart_logger(
frame,
main_chunks[1],
&self.tui_state,
!self.input_state.focused,
);
})?;
Ok(())
}
/// Handles key input by the user into the REPL
pub(crate) async fn handle_key_event(&mut self, key: Key) -> Result<()> {
match key {
Key::PageUp => {
let mut state = self.output_state.lock().unwrap();
if state.output_cursor > 0 && state.output_scroll > 0 {
state.output_cursor -= 1;
}
}
Key::PageDown => {
let mut state = self.output_state.lock().unwrap();
if state.output_cursor < state.output.len() {
state.output_cursor += 1;
}
}
Key::Left => {
if self.input_state.input_cursor > 0 {
self.input_state.input_cursor -= 1
}
}
Key::Right => {
if self.input_state.input_cursor < self.input_state.input.len() {
self.input_state.input_cursor += 1
}
}
Key::Up => {
if self.input_state.history_cursor > 0 {
self.input_state.history_cursor -= 1;
self.input_state.input =
self.input_state.history[self.input_state.history_cursor].clone();
self.input_state.input_cursor = self.input_state.input.len();
}
}
Key::Down => {
if self.input_state.history.is_empty() {
return Ok(());
};
if self.input_state.history_cursor < self.input_state.history.len() - 1 {
self.input_state.history_cursor += 1;
self.input_state.input =
self.input_state.history[self.input_state.history_cursor].clone();
self.input_state.input_cursor = self.input_state.input.len();
} else if self.input_state.history_cursor >= self.input_state.history.len() - 1 {
self.input_state.history_cursor = self.input_state.history.len();
self.input_state.input.clear();
self.input_state.input_cursor = 0;
}
}
Key::Backspace => {
if self.input_state.input_cursor > 0
&& self.input_state.input_cursor <= self.input_state.input.len()
{
self.input_state.input_cursor -= 1;
self.input_state.input.remove(self.input_state.input_cursor);
};
}
//TODO(issue #67): navigate left one word
// Key::Alt(c) if c == 'b' => {
// ()
// }
//TODO(issue #67): navigate right one word
// Key::Alt(c) if c == 'f' => {
// ()
// }
Key::Char(c) if c == '\n' => {
let cmd: String = self.input_state.input.iter().collect();
let iter = cmd.split_ascii_whitespace();
let cli = ReplCli::from_iter_safe(iter);
let multilines = self.input_state.input.len() / self.input_state.input_width;
if multilines >= 1 {
self.input_state.multiline_history += multilines as u16;
};
self.input_state
.history
.push(self.input_state.input.clone());
self.input_state.history_cursor = self.input_state.history.len();
self.input_state.input.clear();
self.input_state.input_cursor = 0;
match cli {
Ok(ReplCli { cmd }) => {
use ReplCliCommand::*;
match cmd {
Clear => {
info!(target: WASH_LOG_INFO, "Clearing REPL history");
self.input_state = InputState::default();
}
Quit => {
info!(target: WASH_CMD_INFO, "Goodbye");
return Err("REPL Quit".into());
}
ReplCliCommand::Drain(draincmd) => {
let output_state = Arc::clone(&self.output_state);
std::thread::spawn(|| {
match handle_drain(draincmd, output_state) {
Ok(r) => r,
Err(e) => error!("Error handling drain: {}", e),
};
});
}
ReplCliCommand::Claims(claimscmd) => {
let output_state = Arc::clone(&self.output_state);
std::thread::spawn(|| {
let rt = actix_rt::System::new();
rt.block_on(async {
match handle_claims(claimscmd, output_state).await {
Ok(r) => r,
Err(e) => error!("Error handling claims: {}", e),
};
});
});
}
ReplCliCommand::Ctl(ctlcmd) => {
// This match statement handles loading an actor from disk instead of from an OCI registry
//
// When a StartActor `ctl` command is sent, we send the `ctl` command to the host API for the following cases:
// 1. The Host is running in standalone mode (all ctl commands are delegated to host API)
// 2. The actor_ref exists as a file on disk AND:
// a. The host ID specified is the embedded host
// b. The host ID is not specified (the embedded host is a suitable host for a local actor)
match (self.embedded_host.as_ref(), ctlcmd.clone()) {
(
Some(host),
CtlCliCommand::Start(StartCommand::Actor(cmd)),
) if host.mode == ReplMode::Lattice => {
if std::fs::metadata(&cmd.actor_ref).is_ok() // File exists
&& (cmd.host_id.is_none()
|| cmd.host_id.unwrap() == host.id)
{
host.op_sender.send(ctlcmd)?;
return Ok(());
}
}
(Some(host), cmd) if host.mode == ReplMode::Standalone => {
host.op_sender.send(cmd)?;
return Ok(());
}
_ => debug!("Dispatching command to lattice control interface (actor not found locally)"),
}
let output_state = Arc::clone(&self.output_state);
std::thread::spawn(|| {
let rt = actix_rt::System::new();
rt.block_on(async {
match handle_ctl(ctlcmd, output_state).await {
Ok(r) => r,
Err(e) => error!("Error handling ctl: {}", e),
};
});
});
}
ReplCliCommand::Keys(keyscmd) => {
let output_state = Arc::clone(&self.output_state);
std::thread::spawn(|| {
let rt = actix_rt::System::new();
rt.block_on(async {
match handle_keys(keyscmd, output_state).await {
Ok(r) => r,
Err(e) => error!("Error handling key: {}", e),
};
});
});
}
ReplCliCommand::Par(parcmd) => {
let output_state = Arc::clone(&self.output_state);
std::thread::spawn(|| {
let rt = actix_rt::System::new();
rt.block_on(async {
match handle_par(parcmd, output_state).await {
Ok(r) => r,
Err(e) => error!("Error handling par: {}", e),
};
});
});
}
ReplCliCommand::Reg(regcmd) => {
let output_state = Arc::clone(&self.output_state);
std::thread::spawn(|| {
let rt = actix_rt::System::new();
rt.block_on(async {
match handle_reg(regcmd, output_state).await {
Ok(r) => r,
Err(e) => error!("Error handling reg: {}", e),
};
});
});
}
}
}
Err(e) => {
use structopt::clap::ErrorKind::*;
// HelpDisplayed is the StructOpt help text error, which should be displayed as info
const WASH_HELP: &str = "WASH_HELP";
match e.kind {
HelpDisplayed => {
for line in e.message.split('\n') {
if !line.is_empty() {
info!(target: WASH_HELP, " {}", line);
} else {
info!(target: WASH_HELP, "\n");
}
}
}
_ => {
for line in e.message.split('\n') {
if !line.is_empty() {
error!(target: WASH_HELP, " {}", line)
} else {
error!(target: WASH_HELP, "\n");
}
}
}
}
}
};
}
Key::Char(c) => {
self.input_state
.input
.insert(self.input_state.input_cursor, c);
self.input_state.input_cursor += 1;
}
_ => (),
};
Ok(())
}
/// Handles keys sent to the tui_logger
pub(crate) async fn handle_tui_logger_key_event(&mut self, key: Key) -> Result<()> {
match key {
Key::Char(' ') => {
self.tui_state.transition(&TuiWidgetEvent::SpaceKey);
}
Key::Esc => {
self.tui_state.transition(&TuiWidgetEvent::EscapeKey);
}
Key::PageUp => {
self.tui_state.transition(&TuiWidgetEvent::PrevPageKey);
}
Key::PageDown => {
self.tui_state.transition(&TuiWidgetEvent::NextPageKey);
}
Key::Up => {
self.tui_state.transition(&TuiWidgetEvent::UpKey);
}
Key::Down => {
self.tui_state.transition(&TuiWidgetEvent::DownKey);
}
Key::Left => {
self.tui_state.transition(&TuiWidgetEvent::LeftKey);
}
Key::Right => {
self.tui_state.transition(&TuiWidgetEvent::RightKey);
}
Key::Char('+') => {
self.tui_state.transition(&TuiWidgetEvent::PlusKey);
}
Key::Char('-') => {
self.tui_state.transition(&TuiWidgetEvent::MinusKey);
}
Key::Char('h') => {
self.tui_state.transition(&TuiWidgetEvent::HideKey);
}
Key::Char('f') => {
self.tui_state.transition(&TuiWidgetEvent::FocusKey);
}
_ => (),
}
Ok(())
}
}