Add more of OS X's native Emacs keybindings

OS X supports many simple Emacs keybindings in native text fields. (It
can do this because the system UI uses Cmd instead of Ctrl as its main
modifier key.) Add bindings to functions which already exist in
DefaultEditorKit.

I have a Ctrl-k (cut to end of line) implementation, but it is an
additional static RecordableTextAction class. I have not included it.

Author: nopdotcom

Diff for: app/src/processing/app/syntax/SketchTextAreaDefaultInputMap.java

@@ -67,8 +67,16 @@ public SketchTextAreaDefaultInputMap() {
 
       put(KeyStroke.getKeyStroke(KeyEvent.VK_A, ctrl), DefaultEditorKit.beginLineAction);
       put(KeyStroke.getKeyStroke(KeyEvent.VK_E, ctrl), DefaultEditorKit.endLineAction);
+      put(KeyStroke.getKeyStroke(KeyEvent.VK_N, ctrl), DefaultEditorKit.downAction);
+      put(KeyStroke.getKeyStroke(KeyEvent.VK_P, ctrl), DefaultEditorKit.upAction);
+      put(KeyStroke.getKeyStroke(KeyEvent.VK_B, ctrl), DefaultEditorKit.backwardAction);
+      put(KeyStroke.getKeyStroke(KeyEvent.VK_F, ctrl), DefaultEditorKit.forwardAction);
+      put(KeyStroke.getKeyStroke(KeyEvent.VK_D, ctrl), DefaultEditorKit.deleteNextCharAction);
+      put(KeyStroke.getKeyStroke(KeyEvent.VK_Y, ctrl), DefaultEditorKit.pasteAction);
+      put(KeyStroke.getKeyStroke(KeyEvent.VK_W, ctrl), DefaultEditorKit.cutAction);
     }
 
+    // VK_DIVIDE is the keypad; should this be added to VK_SLASH as well?
     put(KeyStroke.getKeyStroke(KeyEvent.VK_DIVIDE, defaultModifier), RSyntaxTextAreaEditorKit.rstaToggleCommentAction);
 
     put(KeyStroke.getKeyStroke(KeyEvent.VK_KP_LEFT, 0), DefaultEditorKit.backwardAction);