async loading children

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

@@ -264,6 +264,7 @@ export abstract class ExtHostEditorsShape {
 
 export abstract class ExtHostExplorersShape {
 	$provideTreeContent(treeContentProviderId: string): TPromise<string> { throw ni(); };
+	$resolveChildren(treeContentProviderId: string, node: vscode.ITreeNode): TPromise<string> { throw ni(); }
 }
 
 export abstract class ExtHostExtensionServiceShape {

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

@@ -46,4 +46,15 @@ export class ExtHostExplorers extends ExtHostExplorersShape {
 			return JSON.stringify(treeContent);
 		}));
 	}
+
+	$resolveChildren(treeContentProviderId: string, node: vscode.ITreeNode): TPromise<string> {
+		const provider = this._treeContentProviders[treeContentProviderId];
+		if (!provider) {
+			throw new Error(`no TreeContentProvider registered with id '${treeContentProviderId}'`);
+		}
+
+		return TPromise.wrap(provider.resolveChildren(node).then(children => {
+			return JSON.stringify(children);
+		}));
+	}
 }

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

@@ -28,6 +28,11 @@ export class MainThreadExplorers extends MainThreadExplorersShape {
 				return this._proxy.$provideTreeContent(providerId).then(jsonTree => {
 					return <ITreeNode>JSON.parse(jsonTree);
 				})
+			},
+			resolveChildren: (node: ITreeNode): TPromise<ITreeNode[]> => {
+				return this._proxy.$resolveChildren(providerId, node).then(jsonChildren => {
+					return <ITreeNode[]>JSON.parse(jsonChildren);
+				})
 			}
 		});
 	}