1 files changed, 195 insertions, 0 deletions

diff --git a/keyboards/a_dux/keymaps/daliusd/oneshot.c b/keyboards/a_dux/keymaps/daliusd/oneshot.c
new file mode 100644
index 000000000..1e7b4d965
--- /dev/null
+++ b/keyboards/a_dux/keymaps/daliusd/oneshot.c
@@ -0,0 +1,195 @@
+/* Copyright 2021 @daliusd
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "print.h"
+#include "oneshot.h"
+
+void update_oneshot(
+    oneshot_state *state,
+    uint16_t mod,
+    uint16_t trigger,
+    uint16_t keycode,
+    keyrecord_t *record
+) {
+    if (keycode == trigger) {
+        if (record->event.pressed) {
+            // Trigger keydown
+            if (*state == os_up_unqueued) {
+                register_code(mod);
+            }
+            *state = os_down_unused;
+            dprintf("trigger down (on?), mod: %d, ? -> os_down_unused\n", mod);
+        } else {
+            // Trigger keyup
+            switch (*state) {
+            case os_down_unused:
+                // If we didn't use the mod while trigger was held, queue it.
+                *state = os_up_queued;
+                dprintf("trigger up, mod: %d, os_down_unused -> os_up_queued\n", mod);
+                break;
+            case os_down_used:
+                // If we did use the mod while trigger was held, unregister it.
+                *state = os_up_unqueued;
+                unregister_code(mod);
+                dprintf("trigger up (off), mod: %d, os_down_used -> os_up_unqueued\n", mod);
+                break;
+            default:
+                break;
+            }
+        }
+    } else {
+        if (record->event.pressed) {
+            if (is_oneshot_cancel_key(keycode) && *state != os_up_unqueued) {
+                // Cancel oneshot on designated cancel keydown.
+                *state = os_up_unqueued;
+                unregister_code(mod);
+                dprintf("cancel (off), mod: %d, ? -> os_up_unqueued\n", mod);
+            }
+            if (!is_oneshot_ignored_key(keycode)) {
+                switch (*state) {
+                case os_up_queued:
+                    *state = os_up_queued_used;
+                    dprintf("key up (off), mod: %d, os_up_queued -> os_up_queued_used\n", mod);
+                    break;
+                case os_up_queued_used:
+                    *state = os_up_unqueued;
+                    unregister_code(mod);
+                    dprintf("key up (off), mod: %d, os_up_queued_used -> os_up_unqueued\n", mod);
+                    break;
+                default:
+                    break;
+                }
+            }
+        } else {
+            if (!is_oneshot_ignored_key(keycode)) {
+                // On non-ignored keyup, consider the oneshot used.
+                switch (*state) {
+                case os_down_unused:
+                    *state = os_down_used;
+                    dprintf("key up, mod: %d, os_down_unused -> os_down_used\n", mod);
+                    break;
+                case os_up_queued:
+                    *state = os_up_unqueued;
+                    unregister_code(mod);
+                    dprintf("key up (off), mod: %d, os_up_queued -> os_up_unqueued\n", mod);
+                    break;
+                case os_up_queued_used:
+                    *state = os_up_unqueued;
+                    unregister_code(mod);
+                    dprintf("key up (off), mod: %d, os_up_queued_used -> os_up_unqueued\n", mod);
+                    break;
+                default:
+                    break;
+                }
+            }
+        }
+    }
+}
+
+bool update_oneshot_layer(
+    oneshot_state *state,
+    uint16_t layer,
+    uint16_t trigger,
+    uint16_t keycode,
+    keyrecord_t *record
+) {
+    if (keycode == trigger) {
+        if (record->event.pressed) {
+            // Trigger keydown
+            if (*state == os_up_unqueued) {
+                layer_on(layer);
+            }
+            *state = os_down_unused;
+            dprintf("trigger down (on?), layer: %d, ? -> os_down_unused\n", layer);
+            return false;
+        } else {
+            // Trigger keyup
+            switch (*state) {
+            case os_down_unused:
+                // If we didn't use the layer while trigger was held, queue it.
+                *state = os_up_queued;
+                dprintf("trigger up, layer: %d, os_down_unused -> os_up_queued\n", layer);
+                return false;
+            case os_down_used:
+                // If we did use the layer while trigger was held, turn off it.
+                *state = os_up_unqueued;
+                layer_off(layer);
+                dprintf("trigger up (off), layer: %d, os_down_used -> os_up_unqueued\n", layer);
+                return false;
+            default:
+                break;
+            }
+        }
+    } else {
+        if (record->event.pressed) {
+            if (is_oneshot_layer_cancel_key(keycode) && *state != os_up_unqueued) {
+                // Cancel oneshot layer on designated cancel keydown.
+                *state = os_up_unqueued;
+                layer_off(layer);
+                dprintf("cancel (off), layer: %d, ? -> os_up_unqueued\n", layer);
+                return false;
+            }
+            uint8_t key_layer = read_source_layers_cache(record->event.key);
+            if (key_layer == layer) {
+                // On non-ignored keyup, consider the oneshot used.
+                switch (*state) {
+                case os_down_unused:
+                    *state = os_down_used;
+                    dprintf("key down, layer: %d, os_down_unused -> os_down_used\n", layer);
+                    return true;
+                case os_up_queued:
+                    if (is_oneshot_mod_key(keycode)) {
+                        *state = os_up_unqueued;
+                        layer_off(layer);
+                        dprintf("key down, layer: %d, os_up_queued -> os_up_unqueued\n", layer);
+                        return false;
+                    } else {
+                        *state = os_up_queued_used;
+                        dprintf("key down, layer: %d, os_up_queued -> os_up_queued_used\n", layer);
+                    }
+                    return true;
+               case os_up_queued_used:
+                    *state = os_up_unqueued;
+                    layer_off(layer);
+                    dprintf("key down (off), layer: %d, os_up_queued_used -> os_up_unqueued\n", layer);
+                    return false;
+                default:
+                    break;
+                }
+            }
+        } else {
+            // Ignore key ups from other layers
+            uint8_t key_layer = read_source_layers_cache(record->event.key);
+            if (key_layer == layer) {
+                // On non-ignored keyup, consider the oneshot used.
+                switch (*state) {
+                case os_up_queued:
+                    *state = os_up_unqueued;
+                    layer_off(layer);
+                    dprintf("key up (off), layer: %d, os_up_queued -> os_up_unqueued\n", layer);
+                    return true;
+                case os_up_queued_used:
+                    *state = os_up_unqueued;
+                    layer_off(layer);
+                    dprintf("key up (off), layer: %d, os_up_queued_used -> os_up_unqueued\n", layer);
+                    return true;
+                default:
+                    break;
+                }
+            }
+        }
+    }
+    return true;
+}