Add "Run selection" command

This change introduces a new "Run selection" command which executes the
selected section of PowerShell code and displays the output in the Output
pane.  This makes it easier for a developer to test the code that they are
writing in the absence of a full interactive console.

Author: daviwil

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## 0.2.0
 ### Friday, November 20, 2015
 
+- (Experimental) Added a new "Run selection" (F8) command which executes the current code selection and displays the output
 - Added a new online help command!  Press Ctrl+F1 to get help for the symbol under the cursor.
 - Enabled PowerShell language features for untitled and in-memory (e.g. in Git diff viewer) PowerShell files
 - Added `powershell.scriptAnalysis.enable` configuration variable to allow disabling script analysis for performance (issue #11)

README.md

@@ -13,6 +13,7 @@ that VS Code provides.
 - Go to Definition of cmdlets and variables
 - Find References of cmdlets and variables
 - Document and workspace symbol discovery
+- Run selected selection of PowerShell code using `F8`
 - Launch online help for the symbol under the cursor using `Ctrl+F1`
 - Local script debugging and basic interactive console support!
 

package.json

@@ -38,16 +38,30 @@
 		"compile": "node ./node_modules/vscode/bin/compile -watch -p ./"
     },
 	"contributes": {
-		"keybindings": [{
-			"command": "PowerShell.OnlineHelp",
-			"key": "ctrl+f1",
-			"when": "editorTextFocus"
-		}],
-		"commands": [{
-			"command": "PowerShell.OnlineHelp",
-			"title": "Get online help for command",
-			"category": "PowerShell"
-		}],
+		"keybindings": [
+			{
+				"command": "PowerShell.OnlineHelp",
+				"key": "ctrl+f1",
+				"when": "editorTextFocus && editorLangId == 'powershell'"
+			},
+			{
+				"command": "PowerShell.RunSelection",
+				"key": "f8",
+				"when": "editorTextFocus && editorLangId == 'powershell'"
+			}
+		],
+		"commands": [
+			{
+				"command": "PowerShell.OnlineHelp",
+				"title": "Get online help for command",
+				"category": "PowerShell"
+			},
+			{
+				"command": "PowerShell.RunSelection",
+				"title": "Run selection",
+				"category": "PowerShell"	
+			}
+		],
 		"snippets": [
 			{
 				"language": "powershell",

src/features/Console.ts

@@ -0,0 +1,43 @@
+import vscode = require('vscode');
+import { LanguageClient } from 'vscode-languageclient';
+import { RequestType, NotificationType, ResponseError } from 'vscode-jsonrpc';
+
+export namespace EvaluateRequest {
+	export const type: RequestType<EvaluateRequestArguments, void, void> = 
+		{ get method() { return 'evaluate'; } };
+}
+
+export interface EvaluateRequestArguments {
+	expression: string;
+}
+
+export namespace OutputNotification {
+	export const type: NotificationType<OutputNotificationBody> = 
+		{ get method() { return 'output'; } };
+}
+
+export interface OutputNotificationBody {
+	category: string;
+	output: string;
+}
+
+export function registerConsoleCommands(client: LanguageClient): void {
+	
+	vscode.commands.registerCommand('PowerShell.RunSelection', () => {
+		var editor = vscode.window.activeTextEditor;
+		
+        client.sendRequest(EvaluateRequest.type, {
+			expression: 
+				editor.document.getText(
+					new vscode.Range(
+						editor.selection.anchor, 
+						editor.selection.active))
+		});		
+	});
+	
+	var consoleChannel = vscode.window.createOutputChannel("PowerShell Output");
+	client.onNotification(OutputNotification.type, (output) => {
+		consoleChannel.show(vscode.ViewColumn.Three);		
+		consoleChannel.append(output.output);
+	});
+}

src/main.ts

@@ -11,6 +11,7 @@ import { LanguageClient, LanguageClientOptions, Executable } from 'vscode-langua
 
 import { RequestType, NotificationType, ResponseError } from 'vscode-jsonrpc';
 import { registerShowHelpCommand } from './features/ShowOnlineHelp';
+import { registerConsoleCommands } from './features/Console';
 
 export function activate(context: vscode.ExtensionContext): void {
 
@@ -95,6 +96,7 @@ export function activate(context: vscode.ExtensionContext): void {
 
 	// Register other features
 	registerShowHelpCommand(client);
+	registerConsoleCommands(client);
 }
 
 function resolveLanguageServerPath(settings: settingsManager.ISettings) : string {