(feature) Add &to keycode/behavior (#489)

feat(behaviors): Add `&to` behavior to switch to a layer.

1 files changed, 38 insertions, 0 deletions

diff --git a/app/src/behaviors/behavior_to_layer.c b/app/src/behaviors/behavior_to_layer.c
new file mode 100644
index 0000000..3ec1bf8
--- /dev/null
+++ b/app/src/behaviors/behavior_to_layer.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#define DT_DRV_COMPAT zmk_behavior_to_layer
+
+#include <device.h>
+#include <drivers/behavior.h>
+#include <logging/log.h>
+
+#include <zmk/keymap.h>
+#include <zmk/behavior.h>
+
+LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
+
+static int behavior_to_init(const struct device *dev) { return 0; };
+
+static int to_keymap_binding_pressed(struct zmk_behavior_binding *binding,
+                                     struct zmk_behavior_binding_event event) {
+    LOG_DBG("position %d layer %d", event.position, binding->param1);
+    return zmk_keymap_layer_to(binding->param1);
+}
+
+static int to_keymap_binding_released(struct zmk_behavior_binding *binding,
+                                      struct zmk_behavior_binding_event event) {
+    LOG_DBG("position %d layer %d", event.position, binding->param1);
+    return 0;
+}
+
+static const struct behavior_driver_api behavior_to_driver_api = {
+    .binding_pressed = to_keymap_binding_pressed,
+    .binding_released = to_keymap_binding_released,
+};
+
+DEVICE_AND_API_INIT(behavior_to, DT_INST_LABEL(0), behavior_to_init, NULL, NULL, APPLICATION,
+                    CONFIG_KERNEL_INIT_PRIORITY_DEFAULT, &behavior_to_driver_api);