Only use custom hover in custom tree for markdown tooltip

For now, we will go back to the native hover. The custom hover should be used at the resource label level instead of the tree level to avoid conflicts with resource labels. This is a larger change that will come later.

Part of #106095

src/vs/workbench/contrib/views/browser/treeView.ts

@@ -40,7 +40,6 @@ import { isFalsyOrWhitespace } from 'vs/base/common/strings';
 import { SIDE_BAR_BACKGROUND, PANEL_BACKGROUND } from 'vs/workbench/common/theme';
 import { IHoverService, IHoverOptions, IHoverTarget } from 'vs/workbench/services/hover/browser/hover';
 import { ActionViewItem } from 'vs/base/browser/ui/actionbar/actionViewItems';
-import { IMarkdownString } from 'vs/base/common/htmlContent';
 import { isMacintosh } from 'vs/base/common/platform';
 import { ColorScheme } from 'vs/platform/theme/common/theme';
 import { AnchorPosition } from 'vs/base/browser/ui/contextview/contextview';
@@ -775,6 +774,8 @@ class TreeRenderer extends Disposable implements ITreeRenderer<ITreeItem, FuzzyS
 		}) : undefined;
 		const icon = this.themeService.getColorTheme().type === ColorScheme.LIGHT ? node.icon : node.iconDark;
 		const iconUrl = icon ? URI.revive(icon) : null;
+		const canResolve = node instanceof ResolvableTreeItem && node.hasResolve;
+		const title = node.tooltip ? (isString(node.tooltip) ? node.tooltip : undefined) : (resource ? undefined : (canResolve ? undefined : label));
 
 		// reset
 		templateData.actionBar.clear();
@@ -784,7 +785,7 @@ class TreeRenderer extends Disposable implements ITreeRenderer<ITreeItem, FuzzyS
 			const labelResource = resource ? resource : URI.parse('missing:_icon_resource');
 			templateData.resourceLabel.setResource({ name: label, description, resource: labelResource }, {
 				fileKind: this.getFileKind(node),
-				title: '',
+				title,
 				hideIcon: !!iconUrl,
 				fileDecorations,
 				extraClasses: ['custom-view-tree-node-item-resourceLabel'],
@@ -794,7 +795,7 @@ class TreeRenderer extends Disposable implements ITreeRenderer<ITreeItem, FuzzyS
 			fallbackHover = this.labelService.getUriLabel(labelResource);
 		} else {
 			templateData.resourceLabel.setResource({ name: label, description }, {
-				title: '',
+				title,
 				hideIcon: true,
 				extraClasses: ['custom-view-tree-node-item-resourceLabel'],
 				matches: matches ? matches : createMatches(element.filterData),
@@ -832,6 +833,11 @@ class TreeRenderer extends Disposable implements ITreeRenderer<ITreeItem, FuzzyS
 	}
 
 	private setupHovers(node: ITreeItem, htmlElement: HTMLElement, disposableStore: DisposableStore, label: string | undefined): void {
+		if (!(node instanceof ResolvableTreeItem) || (node.tooltip && isString(node.tooltip)) || (!node.tooltip && !node.hasResolve)) {
+			return;
+		}
+		const resolvableNode: ResolvableTreeItem = node;
+
 		const hoverService = this.hoverService;
 		// Testing has indicated that on Windows and Linux 500 ms matches the native hovers most closely.
 		// On Mac, the delay is 1500.
@@ -849,10 +855,8 @@ class TreeRenderer extends Disposable implements ITreeRenderer<ITreeItem, FuzzyS
 			this.addEventListener(DOM.EventType.MOUSE_LEAVE, mouseLeave, { passive: true });
 			this.addEventListener(DOM.EventType.MOUSE_MOVE, mouseMove, { passive: true });
 			setTimeout(async () => {
-				if (node instanceof ResolvableTreeItem) {
-					await node.resolve();
-				}
-				let tooltip: IMarkdownString | string | undefined = node.tooltip ?? label;
+				await resolvableNode.resolve();
+				const tooltip = resolvableNode.tooltip ?? label;
 				if (isHovering && tooltip) {
 					if (!hoverOptions) {
 						const target: IHoverTarget = {