Add completion feature

package.json

@@ -46,7 +46,8 @@
 	"dependencies": {
 		"vscode-debugprotocol": "~1.6.0-pre4",
 		"vscode-debugadapter": "~1.6.0-pre8",
-		"xmldom": "^0.1.19"
+		"xmldom": "^0.1.19",
+		"which": "^1.2.10"
 	},
 	"devDependencies": {
 		"gulp": "^3.9.0",

readme.md

@@ -107,6 +107,18 @@ Settings available (in your VSCode workspace) for each of the linters:
 }
 ```
 
+## Completion
+
+You will need to install the ruby gem for Intellisense/Completion.
+
+* rcodetools
+
+You need to restart vscode after installation of rcodetools. Then type CTRL-Space after the leading words like below.
+
+```ruby
+[1,2,3].e #<= Type CTRL-Space at here
+```
+
 ## Features
 
 - Ruby scripts debugging

ruby.js

@@ -1,6 +1,9 @@
 "use strict";
 let vscode = require('vscode');
 let linters = require('./lint/lint');
+let cp = require('child_process');
+let which = require('which');
+
 const severities = {
 	refactor: vscode.DiagnosticSeverity.Hint,
 	convention: vscode.DiagnosticSeverity.Information,
@@ -104,6 +107,46 @@ function balanceEvent(event) {
 	if (event && event.document) balancePairs(event.document);
 }
 
+var completeCmd;
+
+function completionProvider(document, position, token) {
+	return new Promise((resolve, reject) => {
+		const line = position.line + 1;
+		const column = position.character;
+
+		var child = cp.spawn(completeCmd, [
+			'--completion-class-info',
+			'--dev',
+			'--fork',
+			'--line='+line,
+			'--column='+column], { detached: false });
+		child.stderr.on('data', (data) => {
+			console.log("stderr:", data.toString());
+			reject(data);
+		});
+		child.stdout.on('data', (data) => {
+			var completionItems = [];
+			data.toString().split('\n').forEach(function(elem) {
+				var items = elem.split('\t');
+				if (/^[^\w]/.test(items[0])) return;
+				var completionItem = new vscode.CompletionItem(items[0]);
+				completionItem.detail = items[1];
+				completionItem.documentation = items[1];
+				completionItem.filterText = items[0];
+				completionItem.insertText = items[0];
+				completionItem.label = items[0];
+				completionItem.kind = vscode.CompletionItemKind.Method;
+				completionItems.push(completionItem);
+			}, this);
+			if (completionItems.length == 0)
+				return reject([]);
+			return resolve(completionItems);
+		});
+		child.stdin.write(document.getText());
+		child.stdin.end();
+	});
+}
+
 function activate(context) {
 	//add language config
 	vscode.languages.setLanguageConfiguration('ruby', langConfig);
@@ -157,6 +200,14 @@ function activate(context) {
 		balancePairs(vscode.window.activeTextEditor.document);
 	}
 
+	which("rct-complete", function(err, found) {
+		if (!err && found) {
+			completeCmd = found;
+			vscode.languages.registerCompletionItemProvider('ruby', {
+				provideCompletionItems: completionProvider
+			});
+		}
+	});
 }
 
 exports.activate = activate;

src/main.ts

@@ -28,7 +28,7 @@ class RubyDebugSession extends DebugSession {
     private _variableHandles: Handles<IDebugVariable>;
     private rubyProcess: RubyProcess;
     private requestArguments: any;
-	private debugMode: Mode;
+    private debugMode: Mode;
 
     /**
      * Creates a new debug adapter.