Removes Graph debounce for known repo changes

Reduces Graph debounce for other changes to 250ms
Updates selected row when HEAD changes
Refs: #2298

Author: eamodio

src/git/models/repository.ts

@@ -45,30 +45,30 @@ const millisecondsPerHour = 60 * 60 * 1000;
 const millisecondsPerDay = 24 * 60 * 60 * 1000;
 
 export const enum RepositoryChange {
-	// FileSystem = 'filesystem',
-	Unknown = 'unknown',
-
-	// No file watching required
-	Closed = 'closed',
-	Ignores = 'ignores',
-	Starred = 'starred',
+	Unknown = -1,
 
 	// File watching required
-	CherryPick = 'cherrypick',
-	Config = 'config',
-	Heads = 'heads',
-	Index = 'index',
-	Merge = 'merge',
-	Rebase = 'rebase',
-	Remotes = 'remotes',
-	RemoteProviders = 'providers',
-	Stash = 'stash',
+	Index = 0,
+	Head = 1,
+	Heads = 2,
+	Tags = 3,
+	Stash = 4,
+	Remotes = 5,
+	Worktrees = 6,
+	Config = 7,
 	/*
 	 * Union of Cherry, Merge, and Rebase
 	 */
-	Status = 'status',
-	Tags = 'tags',
-	Worktrees = 'worktrees',
+	Status = 8,
+	CherryPick = 9,
+	Merge = 10,
+	Rebase = 11,
+
+	// No file watching required
+	Closed = 100,
+	Ignores = 101,
+	RemoteProviders = 102,
+	Starred = 103,
 }
 
 export const enum RepositoryChangeComparisonMode {
@@ -334,6 +334,10 @@ export class Repository implements Disposable {
 					return;
 
 				case 'HEAD':
+					this.resetCaches('branches');
+					this.fireChange(RepositoryChange.Head, RepositoryChange.Heads);
+					return;
+
 				case 'ORIG_HEAD':
 					this.resetCaches('branches');
 					this.fireChange(RepositoryChange.Heads);

src/plus/webviews/graph/graphWebview.ts

@@ -496,6 +496,7 @@ export class GraphWebview extends WebviewBase<State> {
 		if (
 			!e.changed(
 				RepositoryChange.Config,
+				RepositoryChange.Head,
 				RepositoryChange.Heads,
 				// RepositoryChange.Index,
 				RepositoryChange.Remotes,
@@ -511,7 +512,12 @@ export class GraphWebview extends WebviewBase<State> {
 			return;
 		}
 
-		this.updateState();
+		if (e.changed(RepositoryChange.Head, RepositoryChangeComparisonMode.Any)) {
+			this.setSelectedRows(undefined);
+		}
+
+		// Unless we don't know what changed, update the state immediately
+		this.updateState(!e.changed(RepositoryChange.Unknown, RepositoryChangeComparisonMode.Exclusive));
 	}
 
 	@debug({ args: false })
@@ -894,7 +900,7 @@ export class GraphWebview extends WebviewBase<State> {
 		}
 
 		if (this._notifyDidChangeStateDebounced == null) {
-			this._notifyDidChangeStateDebounced = debounce(this.notifyDidChangeState.bind(this), 500);
+			this._notifyDidChangeStateDebounced = debounce(this.notifyDidChangeState.bind(this), 250);
 		}
 
 		void this._notifyDidChangeStateDebounced();