Add `OneShot_ActiveStickyKey`

This key makes any held key (or otherwise active key, most likely OneShot keys)
sticky when it toggles on.

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

plugins/Kaleidoscope-LED-ActiveModColor/src/kaleidoscope/plugin/LED-ActiveModColor.cpp

@@ -50,6 +50,18 @@ EventHandlerResult ActiveModColorEffect::onKeyswitchEvent(
         ::OneShot.isActive(key_addr)) {
       mod_key_bits_.set(key_addr);
     }
+    if (key == OneShot_ActiveStickyKey) {
+      for (KeyAddr entry_addr : KeyAddr::all()) {
+        // Get the entry from the keymap cache
+        Key entry_key = Layer.lookup(entry_addr);
+        // Skip empty entries
+        if (entry_key == Key_Transparent || entry_key == Key_NoKey) {
+          continue;
+        }
+        // Highlight everything else
+        mod_key_bits_.set(entry_addr);
+      }
+    }
   } else if (keyToggledOff(key_state)) {
     // Things get a bit ugly here because this plugin might come
     // before OneShot in the order, so we can't just count on OneShot

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

@@ -210,6 +210,26 @@ EventHandlerResult OneShot::onKeyswitchEvent(
 
   if (keyToggledOn(key_state)) {
 
+    // Make all held keys sticky if `OneShot_ActiveStickyKey` toggles on.
+    if (key == OneShot_ActiveStickyKey) {
+      // Skip the stickify key itself
+      for (KeyAddr entry_addr : KeyAddr::all()) {
+        if (entry_addr == key_addr) {
+          continue;
+        }
+        // Get the entry from the keymap cache
+        Key entry_key = live_keys[entry_addr];
+        // Skip empty entries
+        if (entry_key == Key_Transparent || entry_key == Key_NoKey) {
+          continue;
+        }
+        // Make everything else sticky
+        temp_addrs_.clear(entry_addr);
+        glue_addrs_.set(entry_addr);
+      }
+      return EventHandlerResult::OK;
+    }
+
     if (!temp && !glue) {
       // This key_addr is not in a OneShot state.
 #ifndef ONESHOT_WITHOUT_METASTICKY

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

@@ -63,6 +63,7 @@
 // ----------------------------------------------------------------------------
 // Key constants
 constexpr Key OneShot_MetaStickyKey {kaleidoscope::ranges::OS_META_STICKY};
+constexpr Key OneShot_ActiveStickyKey {kaleidoscope::ranges::OS_ACTIVE_STICKY};
 
 namespace kaleidoscope {
 namespace plugin {

plugins/Kaleidoscope-Ranges/src/Kaleidoscope-Ranges.h

@@ -79,6 +79,7 @@ enum : uint16_t {
   DYNAMIC_MACRO_FIRST,
   DYNAMIC_MACRO_LAST = DYNAMIC_MACRO_FIRST + 31,
   OS_META_STICKY,
+  OS_ACTIVE_STICKY,
   OS_CANCEL,
 
   SAFE_START,