Separate event handlers

src/watch/terminal_event.rs

@@ -0,0 +1,65 @@
+use crossterm::event::{self, Event, KeyCode, KeyEventKind};
+use std::sync::mpsc::Sender;
+
+use super::WatchEvent;
+
+pub enum InputEvent {
+    Hint,
+    List,
+    Quit,
+    Unrecognized(String),
+}
+
+pub fn terminal_event_handler(tx: Sender<WatchEvent>) {
+    let mut input = String::with_capacity(8);
+
+    let last_input_event = loop {
+        let terminal_event = match event::read() {
+            Ok(v) => v,
+            Err(e) => {
+                // If `send` returns an error, then the receiver is dropped and
+                // a shutdown has been already initialized.
+                let _ = tx.send(WatchEvent::TerminalEventErr(e));
+                return;
+            }
+        };
+
+        match terminal_event {
+            Event::Key(key) => {
+                match key.kind {
+                    KeyEventKind::Release => continue,
+                    KeyEventKind::Press | KeyEventKind::Repeat => (),
+                }
+
+                match key.code {
+                    KeyCode::Enter => {
+                        let input_event = match input.trim() {
+                            "h" | "hint" => InputEvent::Hint,
+                            "l" | "list" => break InputEvent::List,
+                            "q" | "quit" => break InputEvent::Quit,
+                            _ => InputEvent::Unrecognized(input.clone()),
+                        };
+
+                        if tx.send(WatchEvent::Input(input_event)).is_err() {
+                            return;
+                        }
+
+                        input.clear();
+                    }
+                    KeyCode::Char(c) => {
+                        input.push(c);
+                    }
+                    _ => (),
+                }
+            }
+            Event::Resize(_, _) => {
+                if tx.send(WatchEvent::TerminalResize).is_err() {
+                    return;
+                }
+            }
+            Event::FocusGained | Event::FocusLost | Event::Mouse(_) | Event::Paste(_) => continue,
+        }
+    };
+
+    let _ = tx.send(WatchEvent::Input(last_input_event));
+}