Add KeyActionId enum.

config-serializer/config-items/KeyAction.ts

@@ -1,3 +1,29 @@
+// A KeyAction is composed of 2 bytes in the RAM of the UHK: id byte, and param byte.
+// Id denotes the subclass of the KeyAction and param is subclass-specific.
+
+enum KeyActionId {
+    NoneAction                = 0,
+    KeyStrokeActionFirst      = TypeChecker.firstValidScancode, // 1
+    // Intermediary scancodes = 2 to 230
+    KeyStrokeActionLast       = TypeChecker.lastValidScancode,   // 231
+    SwitchLayerAction         = 232,
+    SwitchKeymapAction        = 233,
+    MouseAction               = 234,
+    PlayMacroAction           = 235,
+    DualRoleActionLeftCtrl    = 236,
+    DualRoleActionLeftShift   = 237,
+    DualRoleActionLeftAlt     = 238,
+    DualRoleActionLeftSuper   = 239,
+    DualRoleActionRightCtrl   = 240,
+    DualRoleActionRightShift  = 241,
+    DualRoleActionRightAlt    = 242,
+    DualRoleActionRightSuper  = 243,
+    DualRoleActionMod         = 244,
+    DualRoleActionFn          = 245,
+    DualRoleActionMouse       = 246
+    // Let's leave space for further layers - additional actions should descend from 255
+}
+
 class KeyAction {
 
     static fromJsObject(jsObject: any): KeyAction {