feat: Add config settings for sticky keys/hold-tap

* Add new Kconfig symbols to config max held sticky-keys/hold-taps
  and for max captured events during hold-tap resolution.

app/CMakeLists.txt

@@ -47,8 +47,8 @@ if ((NOT CONFIG_ZMK_SPLIT) OR CONFIG_ZMK_SPLIT_ROLE_CENTRAL)
   target_sources_ifdef(CONFIG_ZMK_MOUSE app PRIVATE src/mouse.c)
   target_sources(app PRIVATE src/behaviors/behavior_key_press.c)
   target_sources_ifdef(CONFIG_ZMK_BEHAVIOR_KEY_TOGGLE app PRIVATE src/behaviors/behavior_key_toggle.c)
-  target_sources(app PRIVATE src/behaviors/behavior_hold_tap.c)
+  target_sources_ifdef(CONFIG_ZMK_BEHAVIOR_HOLD_TAP app PRIVATE src/behaviors/behavior_hold_tap.c)
-  target_sources(app PRIVATE src/behaviors/behavior_sticky_key.c)
+  target_sources_ifdef(CONFIG_ZMK_BEHAVIOR_STICKY_KEY app PRIVATE src/behaviors/behavior_sticky_key.c)
   target_sources(app PRIVATE src/behaviors/behavior_caps_word.c)
   target_sources(app PRIVATE src/behaviors/behavior_key_repeat.c)
   target_sources_ifdef(CONFIG_ZMK_BEHAVIOR_MACRO app PRIVATE src/behaviors/behavior_macro.c)

app/Kconfig.behaviors

@@ -40,6 +40,29 @@ endchoice
 
 endif
 
+
+config ZMK_BEHAVIOR_HOLD_TAP
+    bool
+    default y
+    depends on DT_HAS_ZMK_BEHAVIOR_HOLD_TAP_ENABLED
+
+if ZMK_BEHAVIOR_HOLD_TAP
+
+config ZMK_BEHAVIOR_HOLD_TAP_MAX_HELD
+    int "Hold Tap Max Held"
+    default 10
+    help
+      Max number of simultaneously held hold-taps
+
+
+config ZMK_BEHAVIOR_HOLD_TAP_MAX_CAPTURED_EVENTS
+    int "Hold Tap Max Captured Events"
+    default 40
+    help
+      Max number of captured system events while waiting to resolve hold taps
+
+endif
+
 config ZMK_BEHAVIOR_KEY_TOGGLE
     bool
     default y
@@ -51,6 +74,21 @@ config ZMK_BEHAVIOR_MOUSE_KEY_PRESS
     depends on DT_HAS_ZMK_BEHAVIOR_MOUSE_KEY_PRESS_ENABLED
     imply ZMK_MOUSE
 
+config ZMK_BEHAVIOR_STICKY_KEY
+    bool
+    default y
+    depends on DT_HAS_ZMK_BEHAVIOR_STICKY_KEY_ENABLED
+
+if ZMK_BEHAVIOR_STICKY_KEY
+
+config ZMK_BEHAVIOR_STICKY_KEY_MAX_HELD
+    int "Sticky Key Max Held"
+    default 10
+    help
+      Max number of simultaneously held sticky keys
+
+endif
+
 config ZMK_BEHAVIOR_SOFT_OFF
     bool
     default y

app/src/behaviors/behavior_hold_tap.c

@@ -24,8 +24,8 @@ LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
 #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT)
 
-#define ZMK_BHV_HOLD_TAP_MAX_HELD 10
+#define ZMK_BHV_HOLD_TAP_MAX_HELD CONFIG_ZMK_BEHAVIOR_HOLD_TAP_MAX_HELD
-#define ZMK_BHV_HOLD_TAP_MAX_CAPTURED_EVENTS 40
+#define ZMK_BHV_HOLD_TAP_MAX_CAPTURED_EVENTS CONFIG_ZMK_BEHAVIOR_HOLD_TAP_MAX_CAPTURED_EVENTS
 
 // increase if you have keyboard with more keys.
 #define ZMK_BHV_HOLD_TAP_POSITION_NOT_USED 9999

app/src/behaviors/behavior_sticky_key.c

@@ -26,7 +26,7 @@ LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
 #define KEY_PRESS DEVICE_DT_NAME(DT_INST(0, zmk_behavior_key_press))
 
-#define ZMK_BHV_STICKY_KEY_MAX_HELD 10
+#define ZMK_BHV_STICKY_KEY_MAX_HELD CONFIG_ZMK_BEHAVIOR_STICKY_KEY_MAX_HELD
 
 #define ZMK_BHV_STICKY_KEY_POSITION_FREE UINT32_MAX
 

docs/docs/config/behaviors.md

@@ -51,6 +51,13 @@ Creates a custom behavior that triggers one behavior when a key is held or a dif
 
 See the [hold-tap behavior](../behaviors/hold-tap.mdx) documentation for more details and examples.
 
+### Kconfig
+
+| Config                                             | Type | Description                                                                                   | Default |
+| -------------------------------------------------- | ---- | --------------------------------------------------------------------------------------------- | ------- |
+| `CONFIG_ZMK_BEHAVIOR_HOLD_TAP_MAX_HELD`            | int  | Maximum number of simultaneous held hold-taps.                                                | 10      |
+| `CONFIG_ZMK_BEHAVIOR_HOLD_TAP_MAX_CAPTURED_EVENTS` | int  | Maximum number of system events to capture while deferring a hold or tap decision resolution. | 40      |
+
 ### Devicetree
 
 Definition file: [zmk/app/dts/bindings/behaviors/zmk,behavior-hold-tap.yaml](https://github.com/zmkfirmware/zmk/blob/main/app/dts/bindings/behaviors/zmk%2Cbehavior-hold-tap.yaml)
@@ -227,6 +234,12 @@ Creates a custom behavior that triggers a behavior and keeps it pressed it until
 
 See the [sticky key behavior](../behaviors/sticky-key.md) and [sticky layer behavior](../behaviors/sticky-layer.md) documentation for more details and examples.
 
+### Kconfig
+
+| Config                                    | Type | Description                                      | Default |
+| ----------------------------------------- | ---- | ------------------------------------------------ | ------- |
+| `CONFIG_ZMK_BEHAVIOR_STICKY_KEY_MAX_HELD` | int  | Maximum number of simultaneous held sticky keys. | 10      |
+
 ### Devicetree
 
 Definition file: [zmk/app/dts/bindings/behaviors/zmk,behavior-sticky-key.yaml](https://github.com/zmkfirmware/zmk/blob/main/app/dts/bindings/behaviors/zmk%2Cbehavior-sticky-key.yaml)