Add ability to reload a file (#18395)

Closes #13212

Release Notes:

- Added reload command
- vim: Added `:e[dit]`, `:e[dit]!` which calls reload

crates/editor/src/actions.rs

@@ -294,6 +294,7 @@ gpui::actions!(
         RevealInFileManager,
         ReverseLines,
         RevertFile,
+        ReloadFile,
         RevertSelectedHunks,
         Rewrap,
         ScrollCursorBottom,

crates/editor/src/editor.rs

@@ -161,11 +161,11 @@ use ui::{
 };
 use util::{defer, maybe, post_inc, RangeExt, ResultExt, TryFutureExt};
 use workspace::item::{ItemHandle, PreviewTabsSettings};
-use workspace::notifications::{DetachAndPromptErr, NotificationId};
+use workspace::notifications::{DetachAndPromptErr, NotificationId, NotifyTaskExt};
 use workspace::{
     searchable::SearchEvent, ItemNavHistory, SplitDirection, ViewId, Workspace, WorkspaceId,
 };
-use workspace::{OpenInTerminal, OpenTerminal, TabBarSettings, Toast};
+use workspace::{Item as WorkspaceItem, OpenInTerminal, OpenTerminal, TabBarSettings, Toast};
 
 use crate::hover_links::find_url;
 use crate::signature_help::{SignatureHelpHiddenBy, SignatureHelpState};
@@ -6241,6 +6241,13 @@ impl Editor {
         }
     }
 
+    pub fn reload_file(&mut self, _: &ReloadFile, cx: &mut ViewContext<Self>) {
+        let Some(project) = self.project.clone() else {
+            return;
+        };
+        self.reload(project, cx).detach_and_notify_err(cx);
+    }
+
     pub fn revert_selected_hunks(&mut self, _: &RevertSelectedHunks, cx: &mut ViewContext<Self>) {
         let revert_changes = self.gather_revert_changes(&self.selections.disjoint_anchors(), cx);
         if !revert_changes.is_empty() {
@@ -13624,6 +13631,7 @@ pub enum EditorEvent {
     TransactionBegun {
         transaction_id: clock::Lamport,
     },
+    Reloaded,
     CursorShapeChanged,
 }
 

crates/editor/src/element.rs

@@ -437,7 +437,8 @@ impl EditorElement {
         register_action(view, cx, Editor::revert_file);
         register_action(view, cx, Editor::revert_selected_hunks);
         register_action(view, cx, Editor::apply_selected_diff_hunks);
-        register_action(view, cx, Editor::open_active_item_in_terminal)
+        register_action(view, cx, Editor::open_active_item_in_terminal);
+        register_action(view, cx, Editor::reload_file)
     }
 
     fn register_key_listeners(&self, cx: &mut WindowContext, layout: &EditorLayout) {

crates/vim/src/command.rs

@@ -685,6 +685,8 @@ fn generate_commands(_: &AppContext) -> Vec<VimCommand> {
         VimCommand::new(("$", ""), EndOfDocument),
         VimCommand::new(("%", ""), EndOfDocument),
         VimCommand::new(("0", ""), StartOfDocument),
+        VimCommand::new(("e", "dit"), editor::actions::ReloadFile)
+            .bang(editor::actions::ReloadFile),
     ]
 }