Added git\src\model tooltip for decorations.

extensions/git/src/model.ts

@@ -119,6 +119,28 @@ export class Resource implements SourceControlResourceState {
 		}
 	}
 
+	private getTooltip(): string {
+		switch (this.type) {
+			case Status.INDEX_MODIFIED: return localize('index modified', "Index Modified");
+			case Status.MODIFIED: return localize('modified', "Modified");
+			case Status.INDEX_ADDED: return localize('index added', "Index Added");
+			case Status.INDEX_DELETED: return localize('index deleted', "Index Deleted");
+			case Status.DELETED: return localize('deleted', "Deleted");
+			case Status.INDEX_RENAMED: return localize('index renamed', "Index Renamed");
+			case Status.INDEX_COPIED: return localize('index copied', "Index Copied");
+			case Status.UNTRACKED: return localize('untracked', "Untracked");
+			case Status.IGNORED: return localize('ignored', "Ignored");
+			case Status.BOTH_DELETED: return localize('both deleted', "Both Deleted");
+			case Status.ADDED_BY_US: return localize('added by us', "Added By Us");
+			case Status.DELETED_BY_THEM: return localize('deleted by them', "Deleted By Them");
+			case Status.ADDED_BY_THEM: return localize('added by them', "Added By Them");
+			case Status.DELETED_BY_US: return localize('deleted by us', "Deleted By Us");
+			case Status.BOTH_ADDED: return localize('both added', "Both Added");
+			case Status.BOTH_MODIFIED: return localize('both modified', "Both Modified");
+			default: return '';
+		}
+	}
+
 	private get strikeThrough(): boolean {
 		switch (this.type) {
 			case Status.DELETED:
@@ -141,10 +163,11 @@ export class Resource implements SourceControlResourceState {
 	get decorations(): SourceControlResourceDecorations {
 		const light = { iconPath: this.getIconPath('light') };
 		const dark = { iconPath: this.getIconPath('dark') };
+		const tooltip = this.getTooltip();
 		const strikeThrough = this.strikeThrough;
 		const faded = this.faded;
 
-		return { strikeThrough, faded, light, dark };
+		return { strikeThrough, faded, tooltip, light, dark };
 	}
 
 	constructor(

src/vs/vscode.d.ts

@@ -4838,6 +4838,12 @@ declare module 'vscode' {
 		 */
 		readonly faded?: boolean;
 
+		/**
+		 * The title for a specific
+		 * [source control resource state](#SourceControlResourceState).
+		 */
+		readonly tooltip?: string;
+
 		/**
 		 * The light theme decorations.
 		 */

src/vs/workbench/api/electron-browser/mainThreadSCM.ts

@@ -156,12 +156,13 @@ class MainThreadSCMProvider implements ISCMProvider {
 		}
 
 		group.resources = resources.map(rawResource => {
-			const [handle, sourceUri, command, icons, strikeThrough, faded] = rawResource;
+			const [handle, sourceUri, command, icons, tooltip, strikeThrough, faded] = rawResource;
 			const icon = icons[0];
 			const iconDark = icons[1] || icon;
 			const decorations = {
 				icon: icon && URI.parse(icon),
 				iconDark: iconDark && URI.parse(iconDark),
+				tooltip,
 				strikeThrough,
 				faded
 			};

src/vs/workbench/api/node/extHost.protocol.ts

@@ -324,6 +324,7 @@ export type SCMRawResource = [
 	string /*resourceUri*/,
 	modes.Command /*command*/,
 	string[] /*icons: light, dark*/,
+	string /*tooltip*/,
 	boolean /*strike through*/,
 	boolean /*faded*/
 ];

src/vs/workbench/api/node/extHostSCM.ts

@@ -119,10 +119,11 @@ class ExtHostSourceControlResourceGroup implements vscode.SourceControlResourceG
 				icons.push(darkIconPath);
 			}
 
+			const tooltip = r.decorations.tooltip;
 			const strikeThrough = r.decorations && !!r.decorations.strikeThrough;
 			const faded = r.decorations && !!r.decorations.faded;
 
-			return [handle, sourceUri, command, icons, strikeThrough, faded] as SCMRawResource;
+			return [handle, sourceUri, command, icons, tooltip, strikeThrough, faded] as SCMRawResource;
 		});
 
 		this._proxy.$updateGroupResourceStates(this._sourceControlHandle, this._handle, rawResources);

src/vs/workbench/parts/scm/electron-browser/scmViewlet.ts

@@ -197,6 +197,7 @@ class ResourceRenderer implements IRenderer<ISCMResource, ResourceTemplate> {
 
 		if (icon) {
 			template.decorationIcon.style.backgroundImage = `url('${icon}')`;
+			template.decorationIcon.title = resource.decorations.tooltip;
 		} else {
 			template.decorationIcon.style.backgroundImage = '';
 		}

src/vs/workbench/services/scm/common/scm.ts

@@ -22,6 +22,7 @@ export const DefaultSCMProviderIdStorageKey = 'settings.workspace.scm.defaultPro
 export interface ISCMResourceDecorations {
 	icon?: URI;
 	iconDark?: URI;
+	tooltip?: string;
 	strikeThrough?: boolean;
 	faded?: boolean;
 }