dnd in git

fixes #12311

src/vs/workbench/parts/git/browser/views/changes/changesViewer.ts

@@ -218,6 +218,10 @@ interface IStatusGroupTemplateData {
 	actionBar: actionbar.ActionBar;
 }
 
+const STAGED_CHANGES = nls.localize('stagedChanges', "Staged Changes");
+const CHANGES = nls.localize('allChanges', "Changes");
+const MERGE_CHANGES = nls.localize('mergeChanges', "Merge Changes");
+
 export class Renderer implements tree.IRenderer {
 
 	constructor(
@@ -268,9 +272,9 @@ export class Renderer implements tree.IRenderer {
 		data.root = dom.append(container, $('.status-group'));
 
 		switch (statusType) {
-			case git.StatusType.INDEX:			data.root.textContent = nls.localize('stagedChanges', "Staged Changes"); break;
-			case git.StatusType.WORKING_TREE:	data.root.textContent = nls.localize('allChanges', "Changes"); break;
-			case git.StatusType.MERGE:			data.root.textContent = nls.localize('mergeChanges', "Merge Changes"); break;
+			case git.StatusType.INDEX:			data.root.textContent = STAGED_CHANGES; break;
+			case git.StatusType.WORKING_TREE:	data.root.textContent = CHANGES; break;
+			case git.StatusType.MERGE:			data.root.textContent = MERGE_CHANGES; break;
 		}
 
 		const wrapper = dom.append(container, $('.count-badge-wrapper'));
@@ -536,6 +540,27 @@ export class DragAndDrop extends ActionContainer implements tree.IDragAndDrop {
 		return null;
 	}
 
+	getDragLabel(tree: tree.ITree, elements: any[]): string {
+		if (elements.length > 1) {
+			return String(elements.length);
+		}
+
+		const element = elements[0];
+
+		if (element instanceof gitmodel.StatusGroup) {
+			const group = element as gitmodel.StatusGroup;
+
+			switch (group.getType()) {
+				case git.StatusType.INDEX: return STAGED_CHANGES;
+				case git.StatusType.WORKING_TREE: return CHANGES;
+				case git.StatusType.MERGE: return MERGE_CHANGES;
+			}
+		}
+
+		const status = element as gitmodel.FileStatus;
+		return paths.basename(status.getPath());
+	}
+
 	public onDragStart(tree: tree.ITree, data: tree.IDragAndDropData, originalEvent:mouse.DragMouseEvent):void {
 		// no-op
 	}