Add persistent accessibility pane (#9)

* Add persistent accessibility pane

This will facilitate more extensive usage of the menu than the
context menu.

src/accessNodeProvider.ts

@@ -0,0 +1,47 @@
+import * as vscode from 'vscode';
+
+// list of all actions
+let actions: AccessAction[] = [];
+
+class AccessAction extends vscode.TreeItem {
+  constructor(
+    public readonly label: string,
+    public readonly command: vscode.Command
+  ) {
+    super(label, vscode.TreeItemCollapsibleState.None);
+  }
+};
+
+export default class AccessNodeProvider implements vscode.TreeDataProvider<AccessAction> {
+  public getTreeItem(a: AccessAction): vscode.TreeItem {
+    return a;
+  }
+
+  public async getChildren(): Promise<AccessAction[]> {
+    if (actions.length === 0) {
+      // fetch and cache mind-reader options
+      let cmds: string[] = await vscode.commands.getCommands(true); // get non-builtin commands
+      cmds = cmds.filter(x => x.startsWith('mind-reader')); // filter mind-reader commands
+
+      cmds.forEach(c => {
+        let humanReadable = c.replace(/^mind-reader\./, ''); // strip extensions name
+
+        // Convert camelCaseText to Title Case Text
+        humanReadable = humanReadable.replace(/([A-Z])/g, ' $1');
+        humanReadable = humanReadable.charAt(0).toUpperCase() + humanReadable.slice(1);
+
+        // add item to actions
+        actions.push(new AccessAction(
+          humanReadable,
+          {
+            title: humanReadable,
+            command: c,
+            tooltip: humanReadable
+          }
+        ));
+      });
+    }
+
+    return Promise.resolve(actions);
+  }
+}

src/extension.ts

@@ -3,6 +3,8 @@ import * as vscode from 'vscode';
 import * as pl from './pylex';
 import commands from './commands';
 
+import AccessNodeProvider from './accessNodeProvider'
+
 let parser: pl.Parser = new pl.Parser();
 
 export function activate(context: vscode.ExtensionContext) {
@@ -19,6 +21,10 @@ export function activate(context: vscode.ExtensionContext) {
     );
     context.subscriptions.push(disposable);
   });
+
+  let provider = new AccessNodeProvider();
+  vscode.window.registerTreeDataProvider('accessActions', provider);
+
 }
 
 export function deactivate() {}