Change `SpaceCadet::disabled` to `SpaceCadet::mode_`

Switch from `bool` to `enum` in preparation for a third mode of SpaceCadet
functionality, where the modifier becomes active immediately when the key is
pressed, rather than waiting for the key to resolve into the "hold" or "tap"
state.

Signed-off-by: Michael Richters <gedankenexperimenter@gmail.com>

plugins/Kaleidoscope-SpaceCadet/src/kaleidoscope/plugin/SpaceCadet.cpp

@@ -46,7 +46,7 @@ uint16_t SpaceCadet::time_out = 200;
 // -----------------------------------------------------------------------------
 // State variables
 
-bool SpaceCadet::disabled = false;
+uint8_t SpaceCadet::mode_ = SpaceCadet::Mode::ON;
 
 // These variables are used to keep track of any pending unresolved SpaceCadet
 // key that has been pressed. If `pending_map_index_` is negative, it means
@@ -82,17 +82,17 @@ SpaceCadet::SpaceCadet() {
 // Function to determine whether SpaceCadet is active (useful for Macros and
 // other plugins).
 bool SpaceCadet::active() {
-  return !disabled;
+  return mode_ == Mode::ON;
 }
 
 // Function to enable SpaceCadet behavior
 void SpaceCadet::enable() {
-  disabled = false;
+  mode_ = Mode::ON;
 }
 
 // Function to disable SpaceCadet behavior
 void SpaceCadet::disable() {
-  disabled = true;
+  mode_ = Mode::OFF;
 }
 
 // =============================================================================
@@ -134,7 +134,7 @@ EventHandlerResult SpaceCadet::onKeyswitchEvent(KeyEvent &event) {
   }
 
   // Do nothing if disabled, but keep the event tracker current.
-  if (disabled)
+  if (mode_ != Mode::ON)
     return EventHandlerResult::OK;
 
   if (!event_queue_.isEmpty()) {

plugins/Kaleidoscope-SpaceCadet/src/kaleidoscope/plugin/SpaceCadet.h

@@ -73,7 +73,12 @@ class SpaceCadet : public kaleidoscope::Plugin {
   EventHandlerResult afterEachCycle();
 
  private:
-  static bool disabled;
+  enum Mode : uint8_t {
+    ON,
+    OFF,
+    NO_DELAY,
+  };
+  static uint8_t mode_;
 
   static KeyEventTracker event_tracker_;