Autosave all when the terminal loses focus

helix-term/src/application.rs

@@ -29,7 +29,9 @@ use std::{
 use anyhow::{Context, Error};
 
 use crossterm::{
-    event::{DisableMouseCapture, EnableMouseCapture, Event},
+    event::{
+        DisableFocusChange, DisableMouseCapture, EnableFocusChange, EnableMouseCapture, Event,
+    },
     execute, terminal,
     tty::IsTty,
 };
@@ -791,6 +793,7 @@ impl Application {
         let mut stdout = stdout();
         execute!(stdout, terminal::EnterAlternateScreen)?;
         execute!(stdout, terminal::Clear(terminal::ClearType::All))?;
+        execute!(stdout, EnableFocusChange)?;
         if self.config.load().editor.mouse {
             execute!(stdout, EnableMouseCapture)?;
         }
@@ -804,6 +807,7 @@ impl Application {
         // Ignore errors on disabling, this might trigger on windows if we call
         // disable without calling enable previously
         let _ = execute!(stdout, DisableMouseCapture);
+        execute!(stdout, DisableFocusChange)?;
         execute!(stdout, terminal::LeaveAlternateScreen)?;
         terminal::disable_raw_mode()?;
         Ok(())

helix-term/src/commands/typed.rs

@@ -594,7 +594,7 @@ fn write_all_impl(
     bail!(errors)
 }
 
-fn write_all(
+pub fn write_all(
     cx: &mut compositor::Context,
     args: &[Cow<str>],
     event: PromptEvent,
@@ -2007,7 +2007,7 @@ pub static TYPABLE_COMMAND_MAP: Lazy<HashMap<&'static str, &'static TypableComma
             .collect()
     });
 
-pub fn command_mode(cx: &mut Context) {
+pub(super) fn command_mode(cx: &mut Context) {
     let mut prompt = Prompt::new(
         ":".into(),
         Some(':'),

helix-term/src/ui/editor.rs

@@ -3,6 +3,7 @@ use crate::{
     compositor::{Component, Context, EventResult},
     job, key,
     keymap::{KeymapResult, Keymaps},
+    ui::prompt::PromptEvent,
     ui::{Completion, ProgressSpinners},
 };
 
@@ -1236,6 +1237,13 @@ impl Component for EditorView {
             }
 
             Event::Mouse(event) => self.handle_mouse_event(event, &mut cx),
+            Event::FocusGained => EventResult::Ignored(None),
+            Event::FocusLost => {
+                if let Err(e) = commands::typed::write_all(context, &[], PromptEvent::Validate) {
+                    context.editor.set_error(format!("{}", e));
+                }
+                EventResult::Consumed(None)
+            }
         }
     }