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-rw-r--r--common/action_layer.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/common/action_layer.c b/common/action_layer.c
new file mode 100644
index 0000000000..3413c53e65
--- /dev/null
+++ b/common/action_layer.c
@@ -0,0 +1,135 @@
+#include <stdint.h>
+#include "keyboard.h"
+#include "action.h"
+#include "debug.h"
+#include "util.h"
+#include "action_layer.h"
+
+
+/*
+ * Default Layer State
+ */
+uint32_t default_layer_state = 0;
+
+static void default_layer_state_set(uint32_t state)
+{
+ debug("default_layer_state: ");
+ default_layer_debug(); debug(" to ");
+ default_layer_state = state;
+ default_layer_debug(); debug("\n");
+ clear_keyboard_but_mods(); // To avoid stuck keys
+}
+
+void default_layer_debug(void)
+{
+ debug_hex32(default_layer_state);
+ debug("("); debug_dec(biton32(default_layer_state)); debug(")");
+}
+
+void default_layer_set(uint8_t layer)
+{
+ default_layer_state_set(1UL<<layer);
+}
+
+#ifndef NO_ACTION_LAYER
+void default_layer_or(uint32_t state)
+{
+ default_layer_state_set(default_layer_state | state);
+}
+void default_layer_and(uint32_t state)
+{
+ default_layer_state_set(default_layer_state & state);
+}
+void default_layer_xor(uint32_t state)
+{
+ default_layer_state_set(default_layer_state ^ state);
+}
+#endif
+
+
+#ifndef NO_ACTION_LAYER
+/*
+ * Keymap Layer State
+ */
+uint32_t layer_state = 0;
+
+static void layer_state_set(uint32_t state)
+{
+ debug("layer_state: ");
+ layer_debug(); debug(" to ");
+ layer_state = state;
+ layer_debug(); debug("\n");
+ clear_keyboard_but_mods(); // To avoid stuck keys
+}
+
+void layer_clear(void)
+{
+ layer_state_set(0);
+}
+
+void layer_move(uint8_t layer)
+{
+ layer_state_set(1UL<<layer);
+}
+
+void layer_on(uint8_t layer)
+{
+ layer_state_set(layer_state | (1UL<<layer));
+}
+
+void layer_off(uint8_t layer)
+{
+ layer_state_set(layer_state & ~(1UL<<layer));
+}
+
+void layer_invert(uint8_t layer)
+{
+ layer_state_set(layer_state ^ (1UL<<layer));
+}
+
+void layer_or(uint32_t state)
+{
+ layer_state_set(layer_state | state);
+}
+void layer_and(uint32_t state)
+{
+ layer_state_set(layer_state & state);
+}
+void layer_xor(uint32_t state)
+{
+ layer_state_set(layer_state ^ state);
+}
+
+void layer_debug(void)
+{
+ debug_hex32(layer_state);
+ debug("("); debug_dec(biton32(layer_state)); debug(")");
+}
+#endif
+
+
+
+action_t layer_switch_get_action(key_t key)
+{
+ action_t action;
+ action.code = ACTION_TRANSPARENT;
+
+#ifndef NO_ACTION_LAYER
+ uint32_t layers = layer_state | default_layer_state;
+ /* check top layer first */
+ for (int8_t i = 31; i >= 0; i--) {
+ if (layers & (1UL<<i)) {
+ action = action_for_key(i, key);
+ if (action.code != ACTION_TRANSPARENT) {
+ return action;
+ }
+ }
+ }
+ /* fall back to layer 0 */
+ action = action_for_key(0, key);
+ return action;
+#else
+ action = action_for_key(biton32(default_layer_state), key);
+ return action;
+#endif
+}