File watcher added. Nex file viewer will update automatically if file…

… changes in background.

CHANGELOG.md

@@ -1,7 +1,9 @@
 # Changelog
 
+# 1.1.0
+- Nex file viewer will update automatically if file changes in background.
 ## 1.0.0
-- First released version.
+- First beta test version.
 - Register view.
 - Memory dumps.
 - Screen image.

src/editorprovider.ts

@@ -37,13 +37,18 @@ export class EditorProvider implements vscode.CustomReadonlyEditorProvider {
 		webviewPanel.webview.onDidReceiveMessage(message => {
 			switch (message.command) {
 				case 'ready':
-					// Send file data to webview
-					const snaData = readFileSync(filePath);
-					const message = {
-						command: 'setData',
-						snaData: [...snaData]
-					};
-					webviewPanel.webview.postMessage(message);
+					// Send data
+					this.sendDataToWebView(filePath, webviewPanel);
+					// Establish file watcher to check for changes
+					const fsWatcher = vscode.workspace.createFileSystemWatcher(filePath, false, false, true);
+					fsWatcher.onDidChange(() => {
+						// Re-read data
+						this.sendDataToWebView(filePath, webviewPanel);
+					});
+					// Cleanup
+					webviewPanel.onDidDispose(() => {
+						fsWatcher.dispose();
+					});
 					break;
 			}
 		});
@@ -54,6 +59,22 @@ export class EditorProvider implements vscode.CustomReadonlyEditorProvider {
 	}
 
 
+	/**
+	 * Reads the file and sends the data to the webview.
+	 * @param filePath The file name.
+	 * @param webviewPanel The webview to send the data to.
+	 */
+	protected sendDataToWebView(filePath: string, webviewPanel: vscode.WebviewPanel) {
+		// Send file data to webview
+		const snaData = readFileSync(filePath);
+		const message = {
+			command: 'setData',
+			snaData: [...snaData]
+		};
+		webviewPanel.webview.postMessage(message);
+	}
+
+
 	/**
 	 * Returns the html code to display the text.
 	 */