Merge remote-tracking branch 'origin/master' into develop

82 files changed, 3898 insertions, 966 deletions

diff --git a/docs/feature_key_lock.md b/docs/feature_key_lock.md
index d5ad1708c7..1acee524da 100644
--- a/docs/feature_key_lock.md
+++ b/docs/feature_key_lock.md
@@ -16,7 +16,7 @@ First, enable Key Lock by setting `KEY_LOCK_ENABLE = yes` in your `rules.mk`. Th
 
 ## Caveats
 
-Key Lock is only able to hold standard action keys and [One Shot modifier](one_shot_keys.md) keys (for example, if you have your Shift defined as `OSM(KC_LSFT)`).
+Key Lock is only able to hold standard action keys and [One Shot modifier](one_shot_keys.md) keys (for example, if you have your Shift defined as `OSM(MOD_LSFT)`).
 This does not include any of the QMK special functions (except One Shot modifiers), or shifted versions of keys such as `KC_LPRN`. If it's in the [Basic Keycodes](keycodes_basic.md) list, it can be held.
 
 Switching layers will not cancel the Key Lock. The Key Lock can be cancelled by calling the `cancel_key_lock()` function.
diff --git a/docs/ja/feature_key_lock.md b/docs/ja/feature_key_lock.md
index b786fbb048..22cd9fb810 100644
--- a/docs/ja/feature_key_lock.md
+++ b/docs/ja/feature_key_lock.md
@@ -21,7 +21,7 @@
 
 ## 注意事項
 
-キーロックは、標準アクションキーと[ワンショットモディファイア](ja/one_shot_keys.md)キー (例えば、Shift を `OSM(KC_LSFT)` と定義した場合)のみを押し続けることができます。
+キーロックは、標準アクションキーと[ワンショットモディファイア](ja/one_shot_keys.md)キー (例えば、Shift を `OSM(MOD_LSFT)` と定義した場合)のみを押し続けることができます。
 これは、QMK の特殊機能(ワンショットモディファイアを除く)、または `KC_LPRN` のような shift を押されたキーのバージョンは含みません。[基本的なキーコード](ja/keycodes_basic.md)リストにある場合、押したままにすることができます。
 
 レイヤーの切り替えは、キーロックを解除しません。
diff --git a/docs/serial_driver.md b/docs/serial_driver.md
index fff63109a1..7fad23911a 100644
--- a/docs/serial_driver.md
+++ b/docs/serial_driver.md
@@ -1,6 +1,6 @@
 # 'serial' Driver
 
-The serial driver powers the [Split Keyboard](feature_split_keyboard.md) feature. Several implementations are available, depending on the platform of your split keyboard. Note that none of the drivers support split keyboards with more then two halves.
+The serial driver powers the [Split Keyboard](feature_split_keyboard.md) feature. Several implementations are available, depending on the platform of your split keyboard. Note that none of the drivers support split keyboards with more than two halves.
 
 | Driver                                  | AVR                | ARM                | Connection between halves                                                                     |
 | --------------------------------------- | ------------------ | ------------------ | --------------------------------------------------------------------------------------------- |
diff --git a/keyboards/a_dux/keymaps/daliusd/config.h b/keyboards/a_dux/keymaps/daliusd/config.h
index 42e88a687f..786451768a 100644
--- a/keyboards/a_dux/keymaps/daliusd/config.h
+++ b/keyboards/a_dux/keymaps/daliusd/config.h
@@ -17,7 +17,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define UNICODE_SELECTED_MODES UC_MAC, UC_LNX
+#define UNICODE_SELECTED_MODES UC_LNX
 
 #define MOUSEKEY_INTERVAL 12
 #define MOUSEKEY_MAX_SPEED 6
@@ -30,3 +30,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MOUSEKEY_WHEEL_INTERVAL 50
 // The default is 40
 #define MOUSEKEY_WHEEL_TIME_TO_MAX 100
+
+#define FLOW_COUNT 6
+#define FLOW_LAYERS_COUNT 5
diff --git a/keyboards/a_dux/keymaps/daliusd/flow.c b/keyboards/a_dux/keymaps/daliusd/flow.c
new file mode 100644
index 0000000000..6e4db873fe
--- /dev/null
+++ b/keyboards/a_dux/keymaps/daliusd/flow.c
@@ -0,0 +1,336 @@
+/* Copyright 2022 @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 "flow.h"
+
+extern const uint16_t flow_config[FLOW_COUNT][2];
+extern const uint16_t flow_layers_config[FLOW_LAYERS_COUNT][2];
+
+// Represents the states a flow key can be in
+typedef enum {
+    flow_up_unqueued,
+    flow_up_queued,
+    flow_up_queued_used,
+    flow_down_unused,
+    flow_down_used,
+} flow_state_t;
+
+#ifdef FLOW_ONESHOT_TERM
+const int g_flow_oneshot_term = FLOW_ONESHOT_TERM;
+#else
+const int g_flow_oneshot_term = 500;
+#endif
+
+#ifdef FLOW_ONESHOT_WAIT_TERM
+const int g_flow_oneshot_wait_term = FLOW_ONESHOT_WAIT_TERM;
+#else
+const int g_flow_oneshot_wait_term = 500;
+#endif
+
+flow_state_t flow_state[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = flow_up_unqueued };
+bool flow_pressed[FLOW_COUNT][2] = { [0 ... FLOW_COUNT - 1] = {false, false} };
+uint16_t flow_timers[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = 0 };
+bool flow_timeout_timers_active[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = false };
+uint16_t flow_timeout_timers_value[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = 0 };
+uint16_t flow_timeout_wait_timers_value[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = 0 };
+
+flow_state_t flow_layers_state[FLOW_LAYERS_COUNT] = {
+    [0 ... FLOW_LAYERS_COUNT - 1] = flow_up_unqueued
+};
+bool flow_layer_timeout_timers_active[FLOW_LAYERS_COUNT] = { [0 ... FLOW_LAYERS_COUNT - 1] = false };
+uint16_t flow_layer_timeout_timers_value[FLOW_LAYERS_COUNT] = { [0 ... FLOW_LAYERS_COUNT - 1] = 0 };
+uint16_t flow_layer_timeout_wait_timers_value[FLOW_LAYERS_COUNT] = { [0 ... FLOW_LAYERS_COUNT - 1] = 0 };
+
+bool is_flow_ignored_key(uint16_t keycode) {
+    for (int i = 0; i < FLOW_COUNT; i++) {
+        if (flow_config[i][0] == keycode) {
+            return true;
+        }
+    }
+
+    for (int i = 0; i < FLOW_LAYERS_COUNT; i++) {
+        if (flow_layers_config[i][0] == keycode) {
+            return true;
+        }
+    }
+
+    if (keycode == KC_LSFT || keycode == KC_RSFT
+            || keycode == KC_LCTL || keycode == KC_RCTL
+            || keycode == KC_LALT || keycode == KC_RALT
+            || keycode == KC_LGUI || keycode == KC_RGUI) {
+        return true;
+    }
+
+    return false;
+}
+
+bool update_flow_mods(
+    uint16_t keycode,
+    bool pressed
+) {
+    bool pass = true;
+    bool flow_key_list_triggered[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = false };
+    bool flow_key_list_pressed[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = false };
+
+    bool flow_triggered = false;
+
+    for (uint8_t i = 0; i < FLOW_COUNT; i++) {
+        // Layer key
+        if (keycode == flow_config[i][0]) {
+            if (pressed) {
+                flow_pressed[i][0] = true;
+            } else {
+                flow_pressed[i][0] = false;
+            }
+        // KC mod key
+        } else if (keycode == flow_config[i][1]) {
+            if (pressed) {
+                if (flow_pressed[i][0]) {
+                    flow_pressed[i][1] = true;
+                    flow_key_list_triggered[i] = true;
+                    flow_triggered = true;
+                    flow_key_list_pressed[i] = true;
+                    pass = false;
+                 }
+            } else if (flow_pressed[i][1]) {
+                flow_pressed[i][1] = false;
+                if (flow_pressed[i][0]) {
+                    flow_key_list_triggered[i] = true;
+                    flow_triggered = true;
+                    pass = false;
+                } else if ((flow_state[i] == flow_down_unused)
+                        || (flow_state[i] == flow_down_used)) {
+                    flow_key_list_triggered[i] = true;
+                    flow_triggered = true;
+                    pass = false;
+                }
+            }
+        }
+    }
+
+    for (uint8_t i = 0; i < FLOW_COUNT; i++) {
+        if (flow_key_list_triggered[i]) {
+            if (flow_key_list_pressed[i]) {
+                if (flow_state[i] == flow_up_unqueued) {
+                    register_code(flow_config[i][1]);
+                }
+                flow_timeout_wait_timers_value[i] = timer_read();
+                flow_state[i] = flow_down_unused;
+            } else {
+                // Trigger keyup
+                switch (flow_state[i]) {
+                case flow_down_unused:
+                    if (!flow_pressed[i][1]) {
+                        if (timer_elapsed(flow_timeout_wait_timers_value[i]) > g_flow_oneshot_wait_term) {
+                            flow_state[i] = flow_up_unqueued;
+                            unregister_code(flow_config[i][1]);
+                        } else {
+                            // If we didn't use the mod while trigger was held, queue it.
+                            flow_state[i] = flow_up_queued;
+                            flow_timeout_timers_active[i] = true;
+                            flow_timeout_timers_value[i] = timer_read();
+                        }
+                    }
+                    break;
+                case flow_down_used:
+                    // If we did use the mod while trigger was held, unregister it.
+                    if (!flow_pressed[i][1]) {
+                        flow_state[i] = flow_up_unqueued;
+                        unregister_code(flow_config[i][1]);
+                    }
+                    break;
+                default:
+                    break;
+                }
+            }
+        } else if (!flow_triggered) {
+            if (pressed) {
+                if (!is_flow_ignored_key(keycode)) {
+                    switch (flow_state[i]) {
+                    case flow_up_queued:
+                        flow_state[i] = flow_up_queued_used;
+                        flow_timeout_timers_active[i] = false;
+                        break;
+                    case flow_up_queued_used:
+                        flow_state[i] = flow_up_unqueued;
+                        unregister_code(flow_config[i][1]);
+                        break;
+                    default:
+                        break;
+                    }
+                }
+            } else {
+                if (!is_flow_ignored_key(keycode)) {
+                    // On non-ignored keyup, consider the oneshot used.
+                    switch (flow_state[i]) {
+                    case flow_down_unused:
+                        flow_state[i] = flow_down_used;
+                        break;
+                    case flow_up_queued:
+                        flow_state[i] = flow_up_unqueued;
+                        unregister_code(flow_config[i][1]);
+                        break;
+                    case flow_up_queued_used:
+                        flow_state[i] = flow_up_unqueued;
+                        unregister_code(flow_config[i][1]);
+                        break;
+                    default:
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    return pass;
+}
+
+void change_pressed_status(uint16_t keycode, bool pressed) {
+    for (int i = 0; i < FLOW_COUNT; i++) {
+        if (flow_config[i][0] == keycode) {
+            flow_pressed[i][0] = pressed;
+        }
+    }
+}
+
+bool update_flow_layers(
+    uint16_t keycode,
+    bool pressed,
+    keypos_t key_position
+) {
+    uint8_t key_layer = read_source_layers_cache(key_position);
+    bool pass = true;
+
+    for (int i = 0; i < FLOW_LAYERS_COUNT; i++) {
+        uint16_t trigger = flow_layers_config[i][0];
+        uint16_t layer = flow_layers_config[i][1];
+
+        if (keycode == trigger) {
+            if (pressed) {
+                // Trigger keydown
+                if (flow_layers_state[i] == flow_up_unqueued) {
+                    layer_on(layer);
+                    change_pressed_status(trigger, true);
+                }
+                flow_layer_timeout_wait_timers_value[i] = timer_read();
+                flow_layers_state[i] = flow_down_unused;
+                pass = false;
+            } else {
+                // Trigger keyup
+                switch (flow_layers_state[i]) {
+                case flow_down_unused:
+                    if (timer_elapsed(flow_layer_timeout_wait_timers_value[i]) > g_flow_oneshot_wait_term) {
+                        flow_layers_state[i] = flow_up_unqueued;
+                        layer_off(layer);
+                        change_pressed_status(trigger, false);
+                        pass = false;
+                    } else {
+                        // If we didn't use the layer while trigger was held, queue it.
+                        flow_layers_state[i] = flow_up_queued;
+                        flow_layer_timeout_timers_active[i] = true;
+                        flow_layer_timeout_timers_value[i] = timer_read();
+                        pass = false;
+                        change_pressed_status(trigger, true);
+                    }
+                    break;
+                case flow_down_used:
+                    // If we did use the layer while trigger was held, turn off it.
+                    flow_layers_state[i] = flow_up_unqueued;
+                    layer_off(layer);
+                    change_pressed_status(trigger, false);
+                    pass = false;
+                    break;
+                default:
+                    break;
+                }
+            }
+        } else {
+            if (pressed) {
+                if (key_layer == layer) {
+                    // On non-ignored keyup, consider the oneshot used.
+                    switch (flow_layers_state[i]) {
+                    case flow_down_unused:
+                        flow_layers_state[i] = flow_down_used;
+                        break;
+                    case flow_up_queued:
+                        flow_layers_state[i] = flow_up_queued_used;
+                        flow_layer_timeout_timers_active[i] = false;
+                        break;
+                   case flow_up_queued_used:
+                        flow_layers_state[i] = flow_up_unqueued;
+                        layer_off(layer);
+                        change_pressed_status(trigger, false);
+                        pass = false;
+                        break;
+                    default:
+                        br