Introduced caching

Author: Jakob Werner

src/extension.ts

@@ -2,7 +2,7 @@
 // Import the module and reference it with the alias vscode in your code below
 import * as vscode from 'vscode'; 
 var path = require('path');
-var glob = require('glob');
+var Glob = require('glob').Glob;
 
 // this method is called when your extension is activated
 // your extension is activated the very first time the command is executed
@@ -11,28 +11,91 @@ export function activate(context: vscode.ExtensionContext) {
 	// Use the console to output diagnostic information (console.log) and errors (console.error)
 	// This line of code will only be executed once when your extension is activated
 	console.log('The extension "RelativePath" is now active!'); 
+	const workspacePath: string = vscode.workspace.rootPath.replace(/\\/g, "/");
+	var editor = vscode.window.activeTextEditor;
+	let items: string[] = null;
+	var myGlob = null;
+	let paused: boolean = false;
+		
+	function myActivate() {
+		
+		// Show loading info box
+		let info = vscode.window.showQuickPick([], { matchOnDescription: false, placeHolder: "Finding files... Please wait. (Press escape to cancel)" });
+		info.then(
+			(value?: string) => {
+				myGlob.pause();
+				paused = true;
+			},
+			(rejected?: any) => {
+				myGlob.pause();
+				paused = true;
+			}
+		);
+		
+		//Search for files
+		if (paused) {
+			paused = false;
+			myGlob.resume();
+		} else {
+			myGlob = new Glob(workspacePath + "/**/*.*", 
+						{ ignore: ["**/node_modules/**","**/*.dll","**/obj/**","**/objd/**"] }, 
+						function(err, files) {
+								if (err) {
+									return;
+								}
+								
+								items = files;
+								vscode.commands.executeCommand('extension.relativePath');
+					});	
+		}
+	}
+	
+	// Initialize activation
+	myActivate();
+	
+	// Watch for file system changes - as we're caching the searched files
+	let watcher: vscode.FileSystemWatcher = vscode.workspace.createFileSystemWatcher("**/*.*");
+	watcher.ignoreChangeEvents = true;
+	
+	// Add a file on creation
+	watcher.onDidCreate((e: vscode.Uri) => {
+		items.push(e.fsPath.replace(/\\/g, "/"));
+	});
+	
+	// Remove a file on deletion
+	watcher.onDidDelete((e: vscode.Uri) => {
+		let item = e.fsPath.replace(/\\/g, "/");
+		let index = items.indexOf(item);
+		if (index > -1) {
+			items.splice(index, 1);
+		}
+	});
 
 	// The command has been defined in the package.json file
 	// Now provide the implementation of the command with  registerCommand
 	// The commandId parameter must match the command field in package.json
 	var disposable = vscode.commands.registerCommand('extension.relativePath', () => {
 		// The code you place here will be executed every time your command is executed
+		
+		// If there's no file opened	
 		var editor = vscode.window.activeTextEditor;
 		if (!editor) {
-			vscode.window.showInformationMessage("You need to have a file loaded.");	
+			vscode.window.showInformationMessage("You need to have a file opened.");	
 			return; // No open text editor
 		}
 
-		const workspacePath: string = vscode.workspace.rootPath.replace(/\\/g, "/");
-		console.log(workspacePath);
-		glob(workspacePath + "/**/*.*", { ignore: ["**/node_modules/**","**/*.dll","**/obj/**","**/objd/**"] }, function(err, files) {
-			if (err) {
-				return;
-			}
-			
-			console.log(files.length);
-			showQuickPick(files);
-		});
+		// If we canceled the file search
+		if (paused) {
+			myActivate();
+			return;
+		}
+		
+		// If there are no items found
+		if (!items) {
+			return;
+		}
+		
+		showQuickPick(items);
 
 		// Show dropdown editor
 		function showQuickPick(items: string[]): void {
@@ -54,9 +117,7 @@ export function activate(context: vscode.ExtensionContext) {
 		function returnRelativeLink(item: vscode.QuickPickItem): void {
 			if (item) {
 				const targetPath = item.description;
-				console.log(targetPath);
 				const currentItemPath = editor.document.fileName.replace(/\\/g,"/").replace(workspacePath, "");
-				console.log(currentItemPath);
 				let relativeUrl: string = path.relative(currentItemPath, targetPath).replace(".", "").replace(/\\/g,"/");
 				vscode.window.activeTextEditor.edit(
 					(editBuilder: vscode.TextEditorEdit) => {