Close prompts when switching windows (#13620)

Author: CalebLarsen

helix-term/src/compositor.rs

@@ -136,6 +136,11 @@ impl Compositor {
         Some(self.layers.remove(idx))
     }
 
+    pub fn remove_type<T: 'static>(&mut self) {
+        let type_name = std::any::type_name::<T>();
+        self.layers
+            .retain(|component| component.type_name() != type_name);
+    }
     pub fn handle_event(&mut self, event: &Event, cx: &mut Context) -> bool {
         // If it is a key event, a macro is being recorded, and a macro isn't being replayed,
         // push the key event to the recording.

helix-term/src/handlers.rs

@@ -16,6 +16,7 @@ mod auto_save;
 pub mod completion;
 mod diagnostics;
 mod document_colors;
+mod prompt;
 mod signature_help;
 mod snippet;
 
@@ -43,5 +44,6 @@ pub fn setup(config: Arc<ArcSwap<Config>>) -> Handlers {
     diagnostics::register_hooks(&handlers);
     snippet::register_hooks(&handlers);
     document_colors::register_hooks(&handlers);
+    prompt::register_hooks(&handlers);
     handlers
 }

helix-term/src/handlers/prompt.rs

@@ -0,0 +1,17 @@
+use helix_event::register_hook;
+use helix_view::events::DocumentFocusLost;
+use helix_view::handlers::Handlers;
+
+use crate::job::{self};
+use crate::ui;
+
+pub(super) fn register_hooks(_handlers: &Handlers) {
+    register_hook!(move |_event: &mut DocumentFocusLost<'_>| {
+        job::dispatch_blocking(move |_, compositor| {
+            if compositor.find::<ui::Prompt>().is_some() {
+                compositor.remove_type::<ui::Prompt>();
+            }
+        });
+        Ok(())
+    });
+}