joh/breadcrumb reveal (#170863)

* don't reveal negative indexes

* don't update breadcrumbs on each and every file system registration

fixes https://github.com/microsoft/vscode/issues/169875

src/vs/base/browser/ui/breadcrumbs/breadcrumbsWidget.ts

@@ -235,15 +235,19 @@ export class BreadcrumbsWidget {
 	}
 
 	private _reveal(nth: number, minimal: boolean): void {
+		if (nth < 0 || nth >= this._nodes.length) {
+			return;
+		}
 		const node = this._nodes[nth];
-		if (node) {
-			const { width } = this._scrollable.getScrollDimensions();
-			const { scrollLeft } = this._scrollable.getScrollPosition();
-			if (!minimal || node.offsetLeft > scrollLeft + width || node.offsetLeft < scrollLeft) {
-				this._scrollable.setRevealOnScroll(false);
-				this._scrollable.setScrollPosition({ scrollLeft: node.offsetLeft });
-				this._scrollable.setRevealOnScroll(true);
-			}
+		if (!node) {
+			return;
+		}
+		const { width } = this._scrollable.getScrollDimensions();
+		const { scrollLeft } = this._scrollable.getScrollPosition();
+		if (!minimal || node.offsetLeft > scrollLeft + width || node.offsetLeft < scrollLeft) {
+			this._scrollable.setRevealOnScroll(false);
+			this._scrollable.setScrollPosition({ scrollLeft: node.offsetLeft });
+			this._scrollable.setRevealOnScroll(true);
 		}
 	}
 

src/vs/workbench/browser/parts/editor/breadcrumbsControl.ts

@@ -9,7 +9,7 @@ import { BreadcrumbsItem, BreadcrumbsWidget, IBreadcrumbsItemEvent, IBreadcrumbs
 import { tail } from 'vs/base/common/arrays';
 import { timeout } from 'vs/base/common/async';
 import { KeyCode, KeyMod } from 'vs/base/common/keyCodes';
-import { combinedDisposable, DisposableStore, toDisposable } from 'vs/base/common/lifecycle';
+import { combinedDisposable, DisposableStore, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
 import { extUri } from 'vs/base/common/resources';
 import { URI } from 'vs/base/common/uri';
 import 'vs/css!./media/breadcrumbscontrol';
@@ -181,6 +181,7 @@ export class BreadcrumbsControl {
 	private readonly _disposables = new DisposableStore();
 	private readonly _breadcrumbsDisposables = new DisposableStore();
 	private readonly _labels: ResourceLabels;
+	private readonly _model = new MutableDisposable<BreadcrumbsModel>();
 	private _breadcrumbsPickerShowing = false;
 	private _breadcrumbsPickerIgnoreOnceItem: BreadcrumbsItem | undefined;
 
@@ -236,6 +237,10 @@ export class BreadcrumbsControl {
 		this.domNode.remove();
 	}
 
+	get model(): BreadcrumbsModel | undefined {
+		return this._model.value;
+	}
+
 	layout(dim: dom.Dimension | undefined): void {
 		this._widget.layout(dim);
 	}
@@ -284,6 +289,7 @@ export class BreadcrumbsControl {
 			fileInfoUri ?? uri,
 			this._editorGroup.activeEditorPane
 		);
+		this._model.value = model;
 
 		this.domNode.classList.toggle('backslash-path', this._labelService.getSeparator(uri.scheme, uri.authority) === '\\');
 
@@ -317,7 +323,7 @@ export class BreadcrumbsControl {
 		updateBreadcrumbs();
 		this._breadcrumbsDisposables.clear();
 		this._breadcrumbsDisposables.add(listener);
-		this._breadcrumbsDisposables.add(model);
+		this._breadcrumbsDisposables.add(toDisposable(() => this._model.clear()));
 		this._breadcrumbsDisposables.add(configListener);
 		this._breadcrumbsDisposables.add(toDisposable(() => this._widget.setItems([])));
 

src/vs/workbench/browser/parts/editor/titleControl.ts

@@ -165,7 +165,11 @@ export abstract class TitleControl extends Themable {
 			this.breadcrumbsControl = this.instantiationService.createInstance(BreadcrumbsControl, container, options, this.group);
 		}
 
-		this._register(this.fileService.onDidChangeFileSystemProviderRegistrations(() => {
+		this._register(this.fileService.onDidChangeFileSystemProviderRegistrations(e => {
+			if (this.breadcrumbsControl?.model && this.breadcrumbsControl.model.resource.scheme !== e.scheme) {
+				// ignore if the scheme of the breadcrumbs resource is not affected
+				return;
+			}
 			if (this.breadcrumbsControl?.update()) {
 				this.handleBreadcrumbsEnablementChange();
 			}