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use crate::keyboard_parser::KittyKeyboardParser;
use crate::os_input_output::ClientOsApi;
use crate::stdin_ansi_parser::StdinAnsiParser;
use crate::InputInstruction;
use std::sync::{Arc, Mutex};
use termwiz::input::{InputEvent, InputParser, MouseButtons};
use zellij_utils::channels::SenderWithContext;
fn send_done_parsing_after_query_timeout(
send_input_instructions: SenderWithContext<InputInstruction>,
query_duration: u64,
) {
std::thread::spawn({
move || {
std::thread::sleep(std::time::Duration::from_millis(query_duration));
send_input_instructions
.send(InputInstruction::DoneParsing)
.unwrap();
}
});
}
pub(crate) fn stdin_loop(
mut os_input: Box<dyn ClientOsApi>,
send_input_instructions: SenderWithContext<InputInstruction>,
stdin_ansi_parser: Arc<Mutex<StdinAnsiParser>>,
explicitly_disable_kitty_keyboard_protocol: bool,
) {
let mut holding_mouse = false;
let mut input_parser = InputParser::new();
let mut current_buffer = vec![];
{
// on startup we send a query to the terminal emulator for stuff like the pixel size and colors
// we get a response through STDIN, so it makes sense to do this here
let mut stdin_ansi_parser = stdin_ansi_parser.lock().unwrap();
match stdin_ansi_parser.read_cache() {
Some(events) => {
let _ =
send_input_instructions.send(InputInstruction::AnsiStdinInstructions(events));
let _ = send_input_instructions
.send(InputInstruction::DoneParsing)
.unwrap();
},
None => {
send_input_instructions
.send(InputInstruction::StartedParsing)
.unwrap();
let terminal_emulator_query_string =
stdin_ansi_parser.terminal_emulator_query_string();
let _ = os_input
.get_stdout_writer()
.write(terminal_emulator_query_string.as_bytes())
.unwrap();
let query_duration = stdin_ansi_parser.startup_query_duration();
send_done_parsing_after_query_timeout(
send_input_instructions.clone(),
query_duration,
);
},
}
}
let mut ansi_stdin_events = vec![];
loop {
match os_input.read_from_stdin() {
Ok(buf) => {
{
// here we check if we need to parse specialized ANSI instructions sent over STDIN
// this happens either on startup (see above) or on SIGWINCH
//
// if we need to parse them, we do so with an internal timeout - anything else we
// receive on STDIN during that timeout is unceremoniously dropped
let mut stdin_ansi_parser = stdin_ansi_parser.lock().unwrap();
if stdin_ansi_parser.should_parse() {
let events = stdin_ansi_parser.parse(buf);
if !events.is_empty() {
ansi_stdin_events.append(&mut events.clone());
let _ = send_input_instructions
.send(InputInstruction::AnsiStdinInstructions(events));
}
continue;
}
}
if !ansi_stdin_events.is_empty() {
stdin_ansi_parser
.lock()
.unwrap()
.write_cache(ansi_stdin_events.drain(..).collect());
}
current_buffer.append(&mut buf.to_vec());
if !explicitly_disable_kitty_keyboard_protocol {
// first we try to parse with the KittyKeyboardParser
// if we fail, we try to parse normally
match KittyKeyboardParser::new().parse(&buf) {
Some(key_with_modifier) => {
send_input_instructions
.send(InputInstruction::KeyWithModifierEvent(
key_with_modifier,
current_buffer.drain(..).collect(),
))
.unwrap();
continue;
},
None => {},
}
}
let maybe_more = false; // read_from_stdin should (hopefully) always empty the STDIN buffer completely
let mut events = vec![];
input_parser.parse(
&buf,
|input_event: InputEvent| {
events.push(input_event);
},
maybe_more,
);
let event_count = events.len();
for (i, input_event) in events.into_iter().enumerate() {
if holding_mouse && is_mouse_press_or_hold(&input_event) && i == event_count - 1
{
let mut poller = os_input.stdin_poller();
loop {
if poller.ready() {
break;
}
send_input_instructions
.send(InputInstruction::KeyEvent(
input_event.clone(),
current_buffer.clone(),
))
.unwrap();
}
}
holding_mouse = is_mouse_press_or_hold(&input_event);
send_input_instructions
.send(InputInstruction::KeyEvent(
input_event,
current_buffer.drain(..).collect(),
))
.unwrap();
}
},
Err(e) => {
if e == "Session ended" {
log::debug!("Switched sessions, signing this thread off...");
} else {
log::error!("Failed to read from STDIN: {}", e);
}
let _ = send_input_instructions.send(InputInstruction::Exit);
break;
},
}
}
}
fn is_mouse_press_or_hold(input_event: &InputEvent) -> bool {
if let InputEvent::Mouse(mouse_event) = input_event {
if mouse_event.mouse_buttons.contains(MouseButtons::LEFT)
|| mouse_event.mouse_buttons.contains(MouseButtons::RIGHT)
{
return true;
}
}
false
}