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Diffstat (limited to 'tmk_core/common/action_layer.c')
-rw-r--r--tmk_core/common/action_layer.c77
1 files changed, 71 insertions, 6 deletions
diff --git a/tmk_core/common/action_layer.c b/tmk_core/common/action_layer.c
index c535615f4..fc721a732 100644
--- a/tmk_core/common/action_layer.c
+++ b/tmk_core/common/action_layer.c
@@ -110,9 +110,71 @@ void layer_debug(void)
}
#endif
+#if !defined(NO_ACTION_LAYER) && defined(PREVENT_STUCK_MODIFIERS)
+uint8_t source_layers_cache[MAX_LAYER_BITS][(MATRIX_ROWS * MATRIX_COLS + 7) / 8] = {0};
+void update_source_layers_cache(keypos_t key, uint8_t layer)
+{
+ const uint8_t key_number = key.col + (key.row * MATRIX_COLS);
+ const uint8_t storage_row = key_number / 8;
+ const uint8_t storage_bit = key_number % 8;
-action_t layer_switch_get_action(keypos_t key)
+ for (uint8_t bit_number = 0; bit_number < MAX_LAYER_BITS; bit_number++) {
+ source_layers_cache[bit_number][storage_row] ^=
+ (-((layer & (1U << bit_number)) != 0)
+ ^ source_layers_cache[bit_number][storage_row])
+ & (1U << storage_bit);
+ }
+}
+
+uint8_t read_source_layers_cache(keypos_t key)
+{
+ const uint8_t key_number = key.col + (key.row * MATRIX_COLS);
+ const uint8_t storage_row = key_number / 8;
+ const uint8_t storage_bit = key_number % 8;
+ uint8_t layer = 0;
+
+ for (uint8_t bit_number = 0; bit_number < MAX_LAYER_BITS; bit_number++) {
+ layer |=
+ ((source_layers_cache[bit_number][storage_row]
+ & (1U << storage_bit)) != 0)
+ << bit_number;
+ }
+
+ return layer;
+}
+#endif
+
+/*
+ * Make sure the action triggered when the key is released is the same
+ * one as the one triggered on press. It's important for the mod keys
+ * when the layer is switched after the down event but before the up
+ * event as they may get stuck otherwise.
+ */
+action_t store_or_get_action(bool pressed, keypos_t key)
+{
+#if !defined(NO_ACTION_LAYER) && defined(PREVENT_STUCK_MODIFIERS)
+ if (disable_action_cache) {
+ return layer_switch_get_action(key);
+ }
+
+ uint8_t layer;
+
+ if (pressed) {
+ layer = layer_switch_get_layer(key);
+ update_source_layers_cache(key, layer);
+ }
+ else {
+ layer = read_source_layers_cache(key);
+ }
+ return action_for_key(layer, key);
+#else
+ return layer_switch_get_action(key);
+#endif
+}
+
+
+int8_t layer_switch_get_layer(keypos_t key)
{
action_t action;
action.code = ACTION_TRANSPARENT;
@@ -124,15 +186,18 @@ action_t layer_switch_get_action(keypos_t key)
if (layers & (1UL<<i)) {
action = action_for_key(i, key);
if (action.code != ACTION_TRANSPARENT) {
- return action;
+ return i;
}
}
}
/* fall back to layer 0 */
- action = action_for_key(0, key);
- return action;
+ return 0;
#else
- action = action_for_key(biton32(default_layer_state), key);
- return action;
+ return biton32(default_layer_state);
#endif
}
+
+action_t layer_switch_get_action(keypos_t key)
+{
+ return action_for_key(layer_switch_get_layer(key), key);
+}