add an enable/disable commands, and a config option for specifying on…

package.json

@@ -29,9 +29,38 @@
         "workspace"
     ],
     "activationEvents": [
-        "onLanguage:markdown"
+        "onStartupFinished"
     ],
     "main": "./out/extension.js",
+    "contributes": {
+        "configuration": {
+            "title": "Mathpad",
+            "properties": {
+                "Mathpad.filePatterns": {
+                    "type": "array",
+                    "default": [
+                        ".*\\.md"
+                    ],
+                    "description": "File name patterns (regular expressions) for which to run Mathpad"
+                },
+                "Mathpad.enabled": {
+                    "type": "boolean",
+                    "default": false,
+                    "description": "Enable Mathpad"
+                }
+            }
+        },
+        "commands": [
+            {
+              "command": "Mathpad.enable",
+              "title": "Mathpad: Enable"
+            },
+            {
+              "command": "Mathpad.disable",
+              "title": "Mathpad: Disable"
+            }
+        ]
+    },
     "scripts": {
         "vscode:prepublish": "npm run compile",
         "compile": "tsc -p ./",

src/decorator.ts

@@ -15,6 +15,7 @@ import {
 import MathDocument from "./document";
 import { MathJsStatic } from 'mathjs';
 import { create } from "./math";
+import * as path from 'path';
 
 const decorationType = window.createTextEditorDecorationType({
     after: {
@@ -123,7 +124,12 @@ export default class EditorDecorator implements Disposable {
     }
 
     private isMathEnabled(document: TextDocument): boolean {
-        return languages.match(this.documentSelector, document) > 0;
+        let config = workspace.getConfiguration('Mathpad');
+        let filePatterns = config.get('filePatterns') as [string];
+        let currentFileName = path.basename(document.uri.toString());
+        let fileMatches = filePatterns.map((pat) => new RegExp(pat).test(currentFileName));
+        let enabled = config.get('enabled') as boolean;
+        return fileMatches.some((val) => val) && enabled;
     }
 
     /**

src/extension.ts

@@ -4,4 +4,14 @@ import EditorDecorator from './decorator';
 export function activate(context: vscode.ExtensionContext) {
     let decorator = new EditorDecorator(context);
     context.subscriptions.push(decorator);
+    context.subscriptions.push(vscode.commands.registerCommand('Mathpad.enable', () => {
+        let config = vscode.workspace.getConfiguration('Mathpad', );
+        config.update('enabled', true, vscode.ConfigurationTarget.Global);
+        setTimeout(() => {decorator.renderAll();}, 1000);
+    }));
+    context.subscriptions.push(vscode.commands.registerCommand('Mathpad.disable', () => {
+        let config = vscode.workspace.getConfiguration('Mathpad');
+        config.update('enabled', false, vscode.ConfigurationTarget.Global);
+        setTimeout(() => {decorator.renderAll();}, 1000);
+    }));
 }