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|
//! Main input logic.
use zellij_utils::{
input::{
mouse::{MouseButton, MouseEvent},
options::Options,
},
termion, zellij_tile,
};
use crate::{
os_input_output::ClientOsApi, ClientInstruction, CommandIsExecuting, InputInstruction,
};
use zellij_utils::{
channels::{Receiver, SenderWithContext, OPENCALLS},
errors::{ContextType, ErrorContext},
input::{actions::Action, cast_termion_key, config::Config, keybinds::Keybinds},
ipc::{ClientToServerMsg, ExitReason},
};
use zellij_tile::data::{InputMode, Key};
/// Handles the dispatching of [`Action`]s according to the current
/// [`InputMode`], and keep tracks of the current [`InputMode`].
struct InputHandler {
/// The current input mode
mode: InputMode,
os_input: Box<dyn ClientOsApi>,
config: Config,
options: Options,
command_is_executing: CommandIsExecuting,
send_client_instructions: SenderWithContext<ClientInstruction>,
should_exit: bool,
receive_input_instructions: Receiver<(InputInstruction, ErrorContext)>,
}
impl InputHandler {
/// Returns a new [`InputHandler`] with the attributes specified as arguments.
fn new(
os_input: Box<dyn ClientOsApi>,
command_is_executing: CommandIsExecuting,
config: Config,
options: Options,
send_client_instructions: SenderWithContext<ClientInstruction>,
mode: InputMode,
receive_input_instructions: Receiver<(InputInstruction, ErrorContext)>,
) -> Self {
InputHandler {
mode,
os_input,
config,
options,
command_is_executing,
send_client_instructions,
should_exit: false,
receive_input_instructions,
}
}
/// Main input event loop. Interprets the terminal [`Event`](termion::event::Event)s
/// as [`Action`]s according to the current [`InputMode`], and dispatches those actions.
fn handle_input(&mut self) {
let mut err_ctx = OPENCALLS.with(|ctx| *ctx.borrow());
err_ctx.add_call(ContextType::StdinHandler);
let alt_left_bracket = vec![27, 91];
if !self.options.disable_mouse_mode.unwrap_or_default() {
self.os_input.enable_mouse();
}
loop {
if self.should_exit {
break;
}
match self.receive_input_instructions.recv() {
Ok((InputInstruction::KeyEvent(event, raw_bytes), _error_context)) => {
match event {
termion::event::Event::Key(key) => {
let key = cast_termion_key(key);
self.handle_key(&key, raw_bytes);
}
termion::event::Event::Mouse(me) => {
let mouse_event = zellij_utils::input::mouse::MouseEvent::from(me);
self.handle_mouse_event(&mouse_event);
}
termion::event::Event::Unsupported(unsupported_key) => {
// we have to do this because of a bug in termion
// this should be a key event and not an unsupported event
if unsupported_key == alt_left_bracket {
let key = Key::Alt('[');
self.handle_key(&key, raw_bytes);
} else {
// this is a hack because termion doesn't recognize certain keys
// in this case we just forward it to the terminal
self.handle_unknown_key(raw_bytes);
}
}
}
}
Ok((InputInstruction::PastedText(raw_bytes), _error_context)) => {
if self.mode == InputMode::Normal || self.mode == InputMode::Locked {
let action = Action::Write(raw_bytes);
self.dispatch_action(action);
}
}
Ok((InputInstruction::SwitchToMode(input_mode), _error_context)) => {
self.mode = input_mode;
}
Err(err) => panic!("Encountered read error: {:?}", err),
}
}
}
fn handle_unknown_key(&mut self, raw_bytes: Vec<u8>) {
if self.mode == InputMode::Normal || self.mode == InputMode::Locked {
let action = Action::Write(raw_bytes);
self.dispatch_action(action);
}
}
fn handle_key(&mut self, key: &Key, raw_bytes: Vec<u8>) {
let keybinds = &self.config.keybinds;
for action in Keybinds::key_to_actions(key, raw_bytes, &self.mode, keybinds) {
let should_exit = self.dispatch_action(action);
if should_exit {
self.should_exit = true;
}
}
}
fn handle_mouse_event(&mut self, mouse_event: &MouseEvent) {
match *mouse_event {
MouseEvent::Press(button, point) => match button {
MouseButton::WheelUp => {
self.dispatch_action(Action::ScrollUpAt(point));
}
MouseButton::WheelDown => {
self.dispatch_action(Action::ScrollDownAt(point));
}
MouseButton::Left => {
self.dispatch_action(Action::LeftClick(point));
}
MouseButton::Right => {
self.dispatch_action(Action::RightClick(point));
}
_ => {}
},
MouseEvent::Release(point) => {
self.dispatch_action(Action::MouseRelease(point));
}
MouseEvent::Hold(point) => {
self.dispatch_action(Action::MouseHold(point));
}
}
}
/// Dispatches an [`Action`].
///
/// This function's body dictates what each [`Action`] actually does when
/// dispatched.
///
/// # Return value
/// Currently, this function returns a boolean that indicates whether
/// [`Self::handle_input()`] should break after this action is dispatched.
/// This is a temporary measure that is only necessary due to the way that the
/// framework works, and shouldn't be necessary anymore once the test framework
/// is revised. See [issue#183](https://github.com/zellij-org/zellij/issues/183).
fn dispatch_action(&mut self, action: Action) -> bool {
let mut should_break = false;
match action {
Action::NoOp => {}
Action::Quit | Action::Detach => {
self.os_input
.send_to_server(ClientToServerMsg::Action(action));
self.exit();
should_break = true;
}
Action::SwitchToMode(mode) => {
// this is an optimistic update, we should get a SwitchMode instruction from the
// server later that atomically changes the mode as well
self.mode = mode;
self.os_input
.send_to_server(ClientToServerMsg::Action(action));
}
Action::CloseFocus
|