refactor(behaviors): Convert state dependent params.

* Allow each behavior to map a relative binding, e.g. "toggle",
  to an absolute one, e.g. "on", before being invoked.

1 files changed, 18 insertions, 0 deletions

diff --git a/app/src/behaviors/behavior_ext_power.c b/app/src/behaviors/behavior_ext_power.c
index 659cde5..3ce1e74 100644
--- a/app/src/behaviors/behavior_ext_power.c
+++ b/app/src/behaviors/behavior_ext_power.c
@@ -18,6 +18,22 @@ LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
 #if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT)
 
+static int
+on_keymap_binding_convert_central_state_dependent_params(struct zmk_behavior_binding *binding,
+                                                         struct zmk_behavior_binding_event event) {
+    const struct device *ext_power = device_get_binding("EXT_POWER");
+    if (ext_power == NULL) {
+        LOG_ERR("Unable to retrieve ext_power device: %d", binding->param1);
+        return -EIO;
+    }
+
+    if (binding->param1 == EXT_POWER_TOGGLE_CMD) {
+        binding->param1 = ext_power_get(ext_power) > 0 ? EXT_POWER_OFF_CMD : EXT_POWER_ON_CMD;
+    }
+
+    return 0;
+}
+
 static int on_keymap_binding_pressed(struct zmk_behavior_binding *binding,
                                      struct zmk_behavior_binding_event event) {
     const struct device *ext_power = device_get_binding("EXT_POWER");
@@ -51,6 +67,8 @@ static int on_keymap_binding_released(struct zmk_behavior_binding *binding,
 static int behavior_ext_power_init(const struct device *dev) { return 0; };
 
 static const struct behavior_driver_api behavior_ext_power_driver_api = {
+    .binding_convert_central_state_dependent_params =
+        on_keymap_binding_convert_central_state_dependent_params,
     .binding_pressed = on_keymap_binding_pressed,
     .binding_released = on_keymap_binding_released,
 };