Autosave all when the terminal loses focus

Author: groves

Cargo.lock

@@ -37,7 +37,7 @@ which = "4.2"
 
 tokio = { version = "1", features = ["rt", "rt-multi-thread", "io-util", "io-std", "time", "process", "macros", "fs", "parking_lot"] }
 tui = { path = "../helix-tui", package = "helix-tui", default-features = false, features = ["crossterm"] }
-crossterm = { version = "0.24", features = ["event-stream"] }
+crossterm = { version = "0.24.0", features = ["event-stream"], git = "https://github.com/groves/crossterm.git", branch = "emit_focus_events" }
 signal-hook = "0.3"
 tokio-stream = "0.1"
 futures-util = { version = "0.3", features = ["std", "async-await"], default-features = false }

helix-term/Cargo.toml

@@ -28,7 +28,9 @@ use std::{
 use anyhow::{Context, Error};
 
 use crossterm::{
-    event::{DisableMouseCapture, EnableMouseCapture, Event},
+    event::{
+        DisableFocusChange, DisableMouseCapture, EnableFocusChange, EnableMouseCapture, Event,
+    },
     execute, terminal,
     tty::IsTty,
 };
@@ -779,6 +781,7 @@ 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)?;
         }
@@ -792,6 +795,7 @@ 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/application.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/commands/typed.rs

@@ -3,6 +3,7 @@ use crate::{
     compositor::{Component, Context, EventResult},
     job, key,
     keymap::{KeymapResult, Keymaps},
+    ui::prompt::PromptEvent,
     ui::{Completion, ProgressSpinners},
 };
 
@@ -25,7 +26,7 @@ use helix_view::{
 };
 use std::borrow::Cow;
 
-use crossterm::event::{Event, MouseButton, MouseEvent, MouseEventKind};
+use crossterm::event::{Event, FocusEventKind, MouseButton, MouseEvent, MouseEventKind};
 use tui::buffer::Buffer as Surface;
 
 use super::lsp::SignatureHelp;
@@ -1233,6 +1234,13 @@ impl Component for EditorView {
             }
 
             Event::Mouse(event) => self.handle_mouse_event(event, &mut cx),
+            Event::Focus(FocusEventKind::Gained) => EventResult::Ignored(None),
+            Event::Focus(FocusEventKind::Lost) => {
+                if let Err(e) = commands::typed::write_all(context, &[], PromptEvent::Validate) {
+                    context.editor.set_error(format!("{}", e));
+                }
+                EventResult::Consumed(None)
+            }
         }
     }
 

helix-term/src/ui/editor.rs

@@ -19,7 +19,7 @@ default = ["crossterm"]
 bitflags = "1.3"
 cassowary = "0.3"
 unicode-segmentation = "1.9"
-crossterm = { version = "0.24", optional = true }
+crossterm = { version = "0.24.0", optional = true, git = "https://github.com/groves/crossterm.git", branch = "emit_focus_events" }
 serde = { version = "1", "optional" = true, features = ["derive"]}
 helix-view = { version = "0.6", path = "../helix-view", features = ["term"] }
 helix-core = { version = "0.6", path = "../helix-core" }

helix-tui/Cargo.toml

@@ -19,7 +19,7 @@ anyhow = "1"
 helix-core = { version = "0.6", path = "../helix-core" }
 helix-lsp = { version = "0.6", path = "../helix-lsp" }
 helix-dap = { version = "0.6", path = "../helix-dap" }
-crossterm = { version = "0.24", optional = true }
+crossterm = { version = "0.24.0", optional = true, git = "https://github.com/groves/crossterm.git", branch = "emit_focus_events" }
 
 # Conversion traits
 once_cell = "1.13"