Explorer should show hidden files and their path if they are opened

fixes #92090

src/vs/workbench/contrib/files/browser/views/explorerView.ts

@@ -354,6 +354,7 @@ export class ExplorerView extends ViewPane {
 	private createTree(container: HTMLElement): void {
 		this.filter = this.instantiationService.createInstance(FilesFilter);
 		this._register(this.filter);
+		this._register(this.filter.onDidChange(() => this.refresh(true)));
 		const explorerLabels = this.instantiationService.createInstance(ResourceLabels, { onDidChangeVisibility: this.onDidChangeBodyVisibility });
 		this._register(explorerLabels);
 
@@ -458,18 +459,7 @@ export class ExplorerView extends ViewPane {
 		this.autoReveal = configuration?.explorer?.autoReveal;
 
 		// Push down config updates to components of viewer
-		let needsRefresh = false;
-		if (this.filter) {
-			needsRefresh = this.filter.updateConfiguration();
-		}
-
-		if (event && !needsRefresh) {
-			needsRefresh = event.affectsConfiguration('explorer.decorations.colors')
-				|| event.affectsConfiguration('explorer.decorations.badges');
-		}
-
-		// Refresh viewer as needed if this originates from a config event
-		if (event && needsRefresh) {
+		if (event && (event.affectsConfiguration('explorer.decorations.colors') || event.affectsConfiguration('explorer.decorations.badges'))) {
 			this.refresh(true);
 		}
 	}
@@ -672,19 +662,23 @@ export class ExplorerView extends ViewPane {
 		}
 
 		if (item && item.parent) {
-			if (reveal) {
-				if (item.isDisposed) {
-					return this.onSelectResource(resource, reveal, retry + 1);
-				}
+			try {
+				if (reveal) {
+					if (item.isDisposed) {
+						return this.onSelectResource(resource, reveal, retry + 1);
+					}
 
-				// Don't scroll to the item if it's already visible
-				if (this.tree.getRelativeTop(item) === null) {
-					this.tree.reveal(item, 0.5);
+					// Don't scroll to the item if it's already visible
+					if (this.tree.getRelativeTop(item) === null) {
+						this.tree.reveal(item, 0.5);
+					}
 				}
-			}
 
-			this.tree.setFocus([item]);
-			this.tree.setSelection([item]);
+				this.tree.setFocus([item]);
+				this.tree.setSelection([item]);
+			} catch (e) {
+				// Element might not be in the tree, silently fail
+			}
 		}
 	}
 

src/vs/workbench/contrib/files/browser/views/explorerViewer.ts

@@ -55,6 +55,7 @@ import { ILabelService } from 'vs/platform/label/common/label';
 import { isNumber } from 'vs/base/common/types';
 import { domEvent } from 'vs/base/browser/event';
 import { IEditableData } from 'vs/workbench/common/views';
+import { IEditorInput } from 'vs/workbench/common/editor';
 
 export class ExplorerDelegate implements IListVirtualDelegate<ExplorerItem> {
 
@@ -472,28 +473,70 @@ interface CachedParsedExpression {
 	parsed: glob.ParsedExpression;
 }
 
+/**
+ * Respectes files.exclude setting in filtering out content from the explorer.
+ * Makes sure that visible editors are always shown in the explorer even if they are filtered out by settings.
+ */
 export class FilesFilter implements ITreeFilter<ExplorerItem, FuzzyScore> {
 	private hiddenExpressionPerRoot: Map<string, CachedParsedExpression>;
-	private workspaceFolderChangeListener: IDisposable;
+	private hiddenUris = new Set<URI>();
+	private editorsAffectingFilter = new Set<IEditorInput>();
+	private _onDidChange = new Emitter<void>();
+	private toDispose: IDisposable[] = [];
 
 	constructor(
 		@IWorkspaceContextService private readonly contextService: IWorkspaceContextService,
 		@IConfigurationService private readonly configurationService: IConfigurationService,
-		@IExplorerService private readonly explorerService: IExplorerService
+		@IExplorerService private readonly explorerService: IExplorerService,
+		@IEditorService private readonly editorService: IEditorService,
 	) {
 		this.hiddenExpressionPerRoot = new Map<string, CachedParsedExpression>();
-		this.workspaceFolderChangeListener = this.contextService.onDidChangeWorkspaceFolders(() => this.updateConfiguration());
+		this.toDispose.push(this.contextService.onDidChangeWorkspaceFolders(() => this.updateConfiguration()));
+		this.toDispose.push(this.configurationService.onDidChangeConfiguration((e) => {
+			if (e.affectsConfiguration('files.exclude')) {
+				this.updateConfiguration();
+			}
+		}));
+		this.toDispose.push(this.editorService.onDidVisibleEditorsChange(() => {
+			const editors = this.editorService.visibleEditors;
+			let shouldFire = false;
+			this.hiddenUris.forEach(u => {
+				editors.forEach(e => {
+					if (e.resource && isEqualOrParent(e.resource, u)) {
+						// A filtered resource suddenly became visible since user opened an editor
+						shouldFire = true;
+					}
+				});
+			});
+
+			this.editorsAffectingFilter.forEach(e => {
+				if (editors.indexOf(e) === -1) {
+					// Editor that was affecting filtering is no longer visible
+					shouldFire = true;
+				}
+			});
+			if (shouldFire) {
+				this.editorsAffectingFilter.clear();
+				this.hiddenUris.clear();
+				this._onDidChange.fire();
+			}
+		}));
+		this.updateConfiguration();
 	}
 
-	updateConfiguration(): boolean {
-		let needsRefresh = false;
+	get onDidChange(): Event<void> {
+		return this._onDidChange.event;
+	}
+
+	private updateConfiguration(): void {
+		let shouldFire = false;
 		this.contextService.getWorkspace().folders.forEach(folder => {
 			const configuration = this.configurationService.getValue<IFilesConfiguration>({ resource: folder.uri });
 			const excludesConfig: glob.IExpression = configuration?.files?.exclude || Object.create(null);
 
-			if (!needsRefresh) {
+			if (!shouldFire) {
 				const cached = this.hiddenExpressionPerRoot.get(folder.uri.toString());
-				needsRefresh = !cached || !equals(cached.original, excludesConfig);
+				shouldFire = !cached || !equals(cached.original, excludesConfig);
 			}
 
 			const excludesConfigCopy = deepClone(excludesConfig); // do not keep the config, as it gets mutated under our hoods
@@ -501,10 +544,25 @@ export class FilesFilter implements ITreeFilter<ExplorerItem, FuzzyScore> {
 			this.hiddenExpressionPerRoot.set(folder.uri.toString(), { original: excludesConfigCopy, parsed: glob.parse(excludesConfigCopy) });
 		});
 
-		return needsRefresh;
+		if (shouldFire) {
+			this.editorsAffectingFilter.clear();
+			this.hiddenUris.clear();
+			this._onDidChange.fire();
+		}
 	}
 
 	filter(stat: ExplorerItem, parentVisibility: TreeVisibility): TreeFilterResult<FuzzyScore> {
+		const isVisible = this.isVisible(stat, parentVisibility);
+		if (isVisible) {
+			this.hiddenUris.delete(stat.resource);
+		} else {
+			this.hiddenUris.add(stat.resource);
+		}
+
+		return isVisible;
+	}
+
+	private isVisible(stat: ExplorerItem, parentVisibility: TreeVisibility): boolean {
 		if (parentVisibility === TreeVisibility.Hidden) {
 			return false;
 		}
@@ -515,14 +573,21 @@ export class FilesFilter implements ITreeFilter<ExplorerItem, FuzzyScore> {
 		// Hide those that match Hidden Patterns
 		const cached = this.hiddenExpressionPerRoot.get(stat.root.resource.toString());
 		if (cached && cached.parsed(path.relative(stat.root.resource.path, stat.resource.path), stat.name, name => !!(stat.parent && stat.parent.getChild(name)))) {
+			const editors = this.editorService.visibleEditors;
+			const editor = editors.filter(e => e.resource && isEqualOrParent(e.resource, stat.resource)).pop();
+			if (editor) {
+				this.editorsAffectingFilter.add(editor);
+				return true; // Show all opened files and their parents
+			}
+
 			return false; // hidden through pattern
 		}
 
 		return true;
 	}
 
-	public dispose(): void {
-		dispose(this.workspaceFolderChangeListener);
+	dispose(): void {
+		dispose(this.toDispose);
 	}
 }