]> git.donarmstrong.com Git - tmk_firmware.git/blobdiff - common/action.c
Add COMMAND_ENABLE build option
[tmk_firmware.git] / common / action.c
index 425a2b00ff17bc6a7e884fe2bf6774dbef5e16b2..4fafbfa79f58f86a0c1cf1638f859efa2fc3b1f2 100644 (file)
@@ -1,3 +1,19 @@
+/*
+Copyright 2012,2013 Jun Wako <wakojun@gmail.com>
+
+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 "host.h"
 #include "timer.h"
 #include "keymap.h"
 #include "command.h"
 #include "util.h"
 #include "debug.h"
+#include "led.h"
+#include "layer_switch.h"
+#include "action_macro.h"
 #include "action.h"
 
-#define Kdebug(s)       do { if (debug_keyboard) debug(s); } while(0)
-#define Kdebug_P(s)     do { if (debug_keyboard) debug_P(s); } while(0)
-#define Kdebug_hex(s)   do { if (debug_keyboard) debug_hex(s); } while(0)
+
+static void process_action(keyrecord_t *record);
+static bool process_tapping(keyrecord_t *record);
+static void waiting_buffer_scan_tap(void);
+
+static void debug_event(keyevent_t event);
+static void debug_record(keyrecord_t record);
+static void debug_action(action_t action);
+static void debug_tapping_key(void);
+static void debug_waiting_buffer(void);
 
 
 /*
+ * Tapping
+ */
+/* period of tapping(ms) */
+#ifndef TAPPING_TERM
+#define TAPPING_TERM    200
+#endif
+
+/* tap count needed for toggling a feature */
+#ifndef TAPPING_TOGGLE
+#define TAPPING_TOGGLE  5
+#endif
+
+/* stores a key event of current tap. */
+static keyrecord_t tapping_key = {};
+
+#define IS_TAPPING()            !IS_NOEVENT(tapping_key.event)
+#define IS_TAPPING_PRESSED()    (IS_TAPPING() && tapping_key.event.pressed)
+#define IS_TAPPING_RELEASED()   (IS_TAPPING() && !tapping_key.event.pressed)
+#define IS_TAPPING_KEY(k)       (IS_TAPPING() && KEYEQ(tapping_key.event.key, (k)))
+#define WITHIN_TAPPING_TERM(e)  (TIMER_DIFF_16(e.time, tapping_key.event.time) < TAPPING_TERM)
+
+
+/*
+ * Waiting buffer
  *
- * Event/State|IDLE          PRESSING      DELAYING[f]      WAITING[f,k]         
- * -----------+------------------------------------------------------------------
- * Fn  Down   |(L+)          -*1           WAITING(Sk)      IDLE(Rf,Ps)*7        
- *     Up     |(L-)          IDLE(L-)*8    IDLE(L-)*8       IDLE(L-)*8           
- * Fnk Down   |DELAYING(Sf)* (Rf)          WAITING(Sk)      IDLE(Rf,Ps,Rf)       
- *     Up     |(L-)          IDLE(L-/Uf)*8 IDLE(Rf,Uf/L-)*3 IDLE(Rf,Ps,Uf/L-)*3  
- * Key Down   |PRESSING(Rk)  (Rk)          WAITING(Sk)      IDLE(Rf,Ps,Rk)       
- *     Up     |(Uk)          IDLE(Uk)*4    (Uk)             IDLE(L+,Ps,Pk)/(Uk)*a
- *            |
- * Delay      |-             -             IDLE(L+)         IDLE(L+,Ps)          
- * Magic Key  |COMMAND*5
- *
- * *1: ignore Fn if other key is down.
- * *2: register Fnk if any key is pressing
- * *3: register/unregister delayed Fnk and move to IDLE if code == delayed Fnk, else *8
- * *4: if no keys registered to host
- * *5: unregister all keys
- * *6: only if no keys down
- * *7: ignore Fn because Fnk key and stored key are down.
- * *8: move to IDLE if layer switch(off) occurs, else stay at current state
- * *9: repeat key if pressing Fnk twice quickly(move to PRESSING)
- * *a: layer switch and process waiting key and code if code == wainting key, else unregister key
- *
- * States:
- *      IDLE: No key is down except modifiers
- *      DELAYING: delay layer switch after pressing Fn with alt keycode
- *      WAITING: key is pressed during DELAYING
- *
- * Events:
- *      Fn: Fn key without alternative keycode
- *      Fnk: Fn key with alternative keycode
- *      -: ignore
- *      Delay: layer switch delay term is elapsed
- *
- * Actions:
- *      Rk: register key
- *      Uk: unregister key
- *      Rf: register Fn(alt keycode)
- *      Uf: unregister Fn(alt keycode)
- *      Rs: register stored key
- *      Us: unregister stored key
- *      Sk: Store key(waiting Key)
- *      Sf: Store Fn(delayed Fn)
- *      Ps: Process stored key
- *      Ps: Process key
- *      Is: Interpret stored keys in current layer
- *      L+: Switch to new layer(*unregister* all keys but modifiers)
- *      L-: Switch back to last layer(*unregister* all keys but modifiers)
- *      Ld: Switch back to default layer(*unregister* all keys but modifiers)
+ * stores key events waiting for settling current tap.
  */
+#define WAITING_BUFFER_SIZE 8
+static keyrecord_t waiting_buffer[WAITING_BUFFER_SIZE] = {};
+
+/* point to empty cell to enq */
+static uint8_t waiting_buffer_head = 0;
 
+/* point to the oldest data cell to deq */
+static uint8_t waiting_buffer_tail = 0;
 
-typedef enum { IDLE, DELAYING, WAITING, PRESSING } kbdstate_t;
-#define NEXT(state)     do { \
-    Kdebug("NEXT: "); Kdebug_P(state_str(kbdstate)); \
-    kbdstate = state; \
-    Kdebug(" -> "); Kdebug_P(state_str(kbdstate)); Kdebug("\n"); \
-} while (0)
+static bool waiting_buffer_enq(keyrecord_t record)
+{
+    if (IS_NOEVENT(record.event)) {
+        return true;
+    }
 
+    if ((waiting_buffer_head + 1) % WAITING_BUFFER_SIZE == waiting_buffer_tail) {
+        debug("waiting_buffer_enq: Over flow.\n");
+        return false;
+    }
 
-static kbdstate_t kbdstate = IDLE;
-static uint8_t fn_state_bits = 0;
+    waiting_buffer[waiting_buffer_head] = record;
+    waiting_buffer_head = (waiting_buffer_head + 1) % WAITING_BUFFER_SIZE;
+
+    debug("waiting_buffer_enq: "); debug_waiting_buffer();
+    return true;
+}
 
-static const char *state_str(kbdstate_t state)
+static void waiting_buffer_clear(void)
 {
-    if (state == IDLE)      return PSTR("IDLE");
-    if (state == DELAYING)  return PSTR("DELAYING");
-    if (state == WAITING)   return PSTR("WAITING");
-    if (state == PRESSING)  return PSTR("PRESSING");
-    return PSTR("UNKNOWN");
+    waiting_buffer_head = 0;
+    waiting_buffer_tail = 0;
 }
-static bool anykey_sent_to_host(void)
+
+#if TAPPING_TERM >= 500
+static bool waiting_buffer_typed(keyevent_t event)
 {
-    return (host_has_anykey() || host_mouse_in_use() ||
-            host_last_sysytem_report() || host_last_consumer_report());
+    for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
+        if (KEYEQ(event.key, waiting_buffer[i].event.key) && event.pressed !=  waiting_buffer[i].event.pressed) {
+            return true;
+        }
+    }
+    return false;
+}
+#endif
+
+bool waiting_buffer_has_anykey_pressed(void)
+{
+    for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
+        if (waiting_buffer[i].event.pressed) return true;
+    }
+    return false;
 }
 
 
-static void register_code(uint8_t code);
-static void unregister_code(uint8_t code);
-static void register_mods(uint8_t mods);
-static void unregister_mods(uint8_t mods);
-static void clear_keyboard(void);
-static void clear_keyboard_but_mods(void);
-static void layer_switch(uint8_t new_layer);
+/* Oneshot modifier
+ *
+ * Problem: Want to capitalize like 'The' but the result tends to be 'THe'.
+ * Solution: Oneshot modifier have its effect on only one key coming next.
+ *           Tap Shift, then type 't', 'h' and 'e'. Not need to hold Shift key.
+ *
+ *  Hold:       works as normal modifier.
+ *  Tap:        one shot modifier.
+ *  2 Tap:      cancel one shot modifier.
+ *  5-Tap:      toggles enable/disable oneshot feature.
+ */
+static struct {
+    uint8_t mods;
+    uint8_t time;
+    bool    ready;
+    bool    disabled;
+}   oneshot_state;
+
+static void oneshot_start(uint8_t mods, uint16_t time)
+{
+    oneshot_state.mods = mods;
+    oneshot_state.time = time;
+    oneshot_state.ready = true;
+}
 
+static void oneshot_cancel(void)
+{
+    oneshot_state.mods = 0;
+    oneshot_state.time = 0;
+    oneshot_state.ready = false;
+}
 
-/* tap */
-#define TAP_TIME    200
-#define LAYER_DELAY 200
-static keyevent_t last_event = {};
-static uint16_t last_event_time = 0;
-static uint8_t tap_count = 0;
+static void oneshot_toggle(void)
+{
+    oneshot_state.disabled = !oneshot_state.disabled;
+}
 
-/* layer */
-uint8_t default_layer = 0;
-uint8_t current_layer = 0;
-keyrecord_t delaying_layer = {};
 
 
 void action_exec(keyevent_t event)
 {
-    /* count tap when key is up */
-    if (KEYEQ(event.key, last_event.key) && timer_elapsed(last_event_time) < TAP_TIME) {
-        if (!event.pressed) tap_count++;
+    if (!IS_NOEVENT(event)) {
+        debug("\n---- action_exec: start -----\n");
+        debug("EVENT: "); debug_event(event); debug("\n");
+    }
+
+    keyrecord_t record = { .event = event };
+
+    // pre-process on tapping
+    if (process_tapping(&record)) {
+        if (!IS_NOEVENT(record.event)) {
+            debug("processed: "); debug_record(record); debug("\n");
+        }
     } else {
-        tap_count = 0;
+        // enqueue
+        if (!waiting_buffer_enq(record)) {
+            // clear all in case of overflow.
+            debug("OVERFLOW: CLEAR ALL STATES\n");
+            clear_keyboard();
+            waiting_buffer_clear();
+            tapping_key = (keyrecord_t){};
+        }
     }
 
-    /* layer switch after LAYER_DELAY */
-    if (delaying_layer.action.code && timer_elapsed(delaying_layer.event.time) > LAYER_DELAY) {
-        switch (delaying_layer.action.kind.id) {
-            case ACT_LAYER_PRESSED:
-                layer_switch(delaying_layer.action.layer.opt);
-                break;
-            case ACT_LAYER_BIT:
-                layer_switch(current_layer | delaying_layer.action.layer.opt);
-                break;
+    // process waiting_buffer
+    if (!IS_NOEVENT(event) && waiting_buffer_head != waiting_buffer_tail) {
+        debug("---- action_exec: process waiting_buffer -----\n");
+    }
+
+    for (; waiting_buffer_tail != waiting_buffer_head; waiting_buffer_tail = (waiting_buffer_tail + 1) % WAITING_BUFFER_SIZE) {
+        if (process_tapping(&waiting_buffer[waiting_buffer_tail])) {
+            debug("processed: waiting_buffer["); debug_dec(waiting_buffer_tail); debug("] = ");
+            debug_record(waiting_buffer[waiting_buffer_tail]); debug("\n\n");
+        } else {
+            break;
         }
-        delaying_layer = (keyrecord_t){};
     }
-    action_t action = keymap_get_action(current_layer, event.key.row, event.key.col);
+    if (!IS_NOEVENT(event)) {
+        debug("\n");
+    }
+}
 
-    debug("action: "); debug_hex16(action.code); debug("\n");
-    debug("kind.id: "); debug_hex(action.kind.id); debug("\n");
-    debug("kind.param: "); debug_hex16(action.kind.param); debug("\n");
-    debug("key.code: "); debug_hex(action.key.code); debug("\n");
-    debug("key.mods: "); debug_hex(action.key.mods); debug("\n");
+static void process_action(keyrecord_t *record)
+{
+    keyevent_t event = record->event;
+    uint8_t tap_count = record->tap.count;
+
+    if (IS_NOEVENT(event)) { return; }
+
+    action_t action = layer_switch_get_action(event.key);
+    debug("ACTION: "); debug_action(action);
+    debug(" overlays: "); overlay_debug();
+    debug(" keymaps: "); keymap_debug();
+    debug(" default_layer: "); debug_dec(default_layer); debug("\n");
 
     switch (action.kind.id) {
+        /* Key and Mods */
         case ACT_LMODS:
-            // normal key or key plus mods
-            if (event.pressed) {
-                register_mods(action.key.mods);
-                register_code(action.key.code);
-            } else {
-                unregister_code(action.key.code);
-                unregister_mods(action.key.mods);
-            }
-            break;
         case ACT_RMODS:
-            if (event.pressed) {
-                register_mods(action.key.mods<<4);
-                register_code(action.key.code);
-            } else {
-                unregister_code(action.key.code);
-                unregister_mods(action.key.mods<<4);
+            {
+                uint8_t mods = (action.kind.id == ACT_LMODS) ?  action.key.mods :
+                                                                action.key.mods<<4;
+                if (event.pressed) {
+                    uint8_t tmp_mods = host_get_mods();
+                    if (mods) {
+                        host_add_mods(mods);
+                        host_send_keyboard_report();
+                    }
+                    register_code(action.key.code);
+                    if (mods && action.key.code) {
+                        host_set_mods(tmp_mods);
+                        host_send_keyboard_report();
+                    }
+                } else {
+                    if (mods && !action.key.code) {
+                        host_del_mods(mods);
+                        host_send_keyboard_report();
+                    }
+                    unregister_code(action.key.code);
+                }
             }
             break;
-        case ACT_LMOD_TAP:
-            break;
-        case ACT_RMOD_TAP:
+        case ACT_LMODS_TAP:
+        case ACT_RMODS_TAP:
+            {
+                uint8_t mods = (action.kind.id == ACT_LMODS_TAP) ?  action.key.mods :
+                                                                    action.key.mods<<4;
+                switch (action.layer.code) {
+                    case 0x00:
+                        // Oneshot modifier
+                        if (event.pressed) {
+                            if (tap_count == 0) {
+                                debug("MODS_TAP: Oneshot: add_mods\n");
+                                add_mods(mods);
+                            }
+                            else if (tap_count == 1) {
+                                debug("MODS_TAP: Oneshot: start\n");
+                                oneshot_start(mods, event.time);
+                            }
+                            else if (tap_count == TAPPING_TOGGLE) {
+                                debug("MODS_TAP: Oneshot: toggle\n");
+                                oneshot_toggle();
+                            }
+                            else {
+                                debug("MODS_TAP: Oneshot: cancel&add_mods\n");
+                                // double tap cancels oneshot and works as normal modifier.
+                                oneshot_cancel();
+                                add_mods(mods);
+                            }
+                        } else {
+                            if (tap_count == 0) {
+                                debug("MODS_TAP: Oneshot: cancel/del_mods\n");
+                                // cancel oneshot on hold
+                                oneshot_cancel();
+                                del_mods(mods);
+                            }
+                            else if (tap_count == 1) {
+                                debug("MODS_TAP: Oneshot: del_mods\n");
+                                // retain Oneshot
+                                del_mods(mods);
+                            }
+                            else {
+                                debug("MODS_TAP: Oneshot: del_mods\n");
+                                // cancel Mods
+                                del_mods(mods);
+                            }
+                        }
+                        break;
+                    default:
+                        if (event.pressed) {
+                            if (tap_count > 0) {
+                                if (waiting_buffer_has_anykey_pressed()) {
+                                    debug("MODS_TAP: Tap: Cancel: add_mods\n");
+                                    // ad hoc: set 0 to cancel tap
+                                    record->tap.count = 0;
+                                    add_mods(mods);
+                                } else {
+                                    debug("MODS_TAP: Tap: register_code\n");
+                                    register_code(action.key.code);
+                                }
+                            } else {
+                                debug("MODS_TAP: No tap: add_mods\n");
+                                add_mods(mods);
+                            }
+                        } else {
+                            if (tap_count > 0) {
+                                debug("MODS_TAP: Tap: unregister_code\n");
+                                unregister_code(action.key.code);
+                            } else {
+                                debug("MODS_TAP: No tap: add_mods\n");
+                                del_mods(mods);
+                            }
+                        }
+                        break;
+                }
+            }
             break;
+
+        /* other HID usage */
         case ACT_USAGE:
 #ifdef EXTRAKEY_ENABLE
             switch (action.usage.page) {
-                case ACTION_USAGE_PAGE_SYSTEM:
+                case PAGE_SYSTEM:
                     if (event.pressed) {
                         host_system_send(action.usage.code);
                     } else {
                         host_system_send(0);
                     }
                     break;
-                case ACTION_USAGE_PAGE_CONSUMER:
+                case PAGE_CONSUMER:
                     if (event.pressed) {
                         host_consumer_send(action.usage.code);
                     } else {
@@ -189,6 +341,8 @@ void action_exec(keyevent_t event)
             }
 #endif
             break;
+
+        /* Mouse key */
         case ACT_MOUSEKEY:
 #ifdef MOUSEKEY_ENABLE
             if (event.pressed) {
@@ -200,193 +354,567 @@ void action_exec(keyevent_t event)
             }
 #endif
             break;
-        case ACT_LAYER_PRESSED:
-            // layer action when pressed
+
+        case ACT_KEYMAP:
             switch (action.layer.code) {
-                case 0x00:
+                /* Keymap clear */
+                case OP_RESET:
+                    switch (action.layer.val & 0x03) {
+                        case 0:
+                            // NOTE: reserved
+                            overlay_clear();
+                            keymap_clear();
+                            break;
+                        case ON_PRESS:
+                            if (event.pressed) {
+                                overlay_clear();
+                                keymap_clear();
+                            }
+                            break;
+                        case ON_RELEASE:
+                            if (!event.pressed) {
+                                overlay_clear();
+                                keymap_clear();
+                            }
+                            break;
+                        case ON_BOTH:
+                            overlay_clear();
+                            keymap_clear();
+                            break;
+                        /* NOTE: 4-7 rserved */
+                    }
+                    break;
+                /* Keymap Reset default layer */
+                case (OP_RESET | ON_PRESS):
+                    if (event.pressed) {
+                        default_layer_set(action.layer.val);
+                    }
+                    break;
+                case (OP_RESET | ON_RELEASE):
+                    if (!event.pressed) {
+                        default_layer_set(action.layer.val);
+                    }
+                    break;
+                case (OP_RESET | ON_BOTH):
+                    default_layer_set(action.layer.val);
+                    break;
+
+                /* Keymap Bit invert */
+                case OP_INV:
+                    /* with tap toggle */
+                    if (event.pressed) {
+                        if (tap_count < TAPPING_TOGGLE) {
+                            debug("KEYMAP_INV: tap toggle(press).\n");
+                            keymap_invert(action.layer.val);
+                        }
+                    } else {
+                        if (tap_count <= TAPPING_TOGGLE) {
+                            debug("KEYMAP_INV: tap toggle(release).\n");
+                            keymap_invert(action.layer.val);
+                        }
+                    }
+                    break;
+                case (OP_INV | ON_PRESS):
                     if (event.pressed) {
-                        layer_switch(action.layer.opt);
+                        keymap_invert(action.layer.val);
+                    }
+                    break;
+                case (OP_INV | ON_RELEASE):
+                    if (!event.pressed) {
+                        keymap_invert(action.layer.val);
                     }
                     break;
-                case 0xF0:
-                    // TODO: tap toggle
+                case (OP_INV | ON_BOTH):
+                    keymap_invert(action.layer.val);
+                    break;
+
+                /* Keymap Bit on */
+                case OP_ON:
+                    if (event.pressed) {
+                        keymap_on(action.layer.val);
+                    } else {
+                        keymap_off(action.layer.val);
+                    }
                     break;
-                case 0xFF:
+                case (OP_ON | ON_PRESS):
                     if (event.pressed) {
-                        default_layer = action.layer.opt;
-                        layer_switch(default_layer);
+                        keymap_on(action.layer.val);
+                    }
+                    break;
+                case (OP_ON | ON_RELEASE):
+                    if (!event.pressed) {
+                        keymap_on(action.layer.val);
                     }
                     break;
+                case (OP_ON | ON_BOTH):
+                    keymap_on(action.layer.val);
+                    break;
+
+                /* Keymap Bit off */
+                case OP_OFF:
+                    if (event.pressed) {
+                        keymap_off(action.layer.val);
+                    } else {
+                        keymap_on(action.layer.val);
+                    }
+                    break;
+                case (OP_OFF | ON_PRESS):
+                    if (event.pressed) {
+                        keymap_off(action.layer.val);
+                    }
+                    break;
+                case (OP_OFF | ON_RELEASE):
+                    if (!event.pressed) {
+                        keymap_off(action.layer.val);
+                    }
+                    break;
+                case (OP_OFF | ON_BOTH):
+                    keymap_off(action.layer.val);
+                    break;
+
+                /* Keymap Bit set */
+                case OP_SET:
+                    if (event.pressed) {
+                        keymap_set(action.layer.val);
+                    } else {
+                        keymap_clear();
+                    }
+                    break;
+                case (OP_SET | ON_PRESS):
+                    if (event.pressed) {
+                        keymap_set(action.layer.val);
+                    }
+                    break;
+                case (OP_SET | ON_RELEASE):
+                    if (!event.pressed) {
+                        keymap_set(action.layer.val);
+                    }
+                    break;
+                case (OP_SET | ON_BOTH):
+                    keymap_set(action.layer.val);
+                    break;
+
+                /* Keymap Bit invert with tap key */
                 default:
-                    // with tap key
-                    debug("tap: "); debug_hex(tap_count); debug("\n");
                     if (event.pressed) {
-                        if (tap_count == 0) {
-                            if (host_has_anykey()) {
-                                register_code(action.layer.code);
-                            } else {
-                                delaying_layer = (keyrecord_t){
-                                    .event = event,
-                                    .action = action,
-                                    .mods = keyboard_report->mods
-                                };
-                            }
-                        } else if (tap_count > 0) {
+                        if (tap_count > 0) {
+                            debug("KEYMAP_TAP_KEY: Tap: register_code\n");
                             register_code(action.layer.code);
+                        } else {
+                            debug("KEYMAP_TAP_KEY: No tap: On on press\n");
+                            keymap_on(action.layer.val);
                         }
                     } else {
-                        // type key after tap
-                        if (tap_count == 1) {
-                            delaying_layer = (keyrecord_t){};
-                            register_code(action.layer.code);
+                        if (tap_count > 0) {
+                            debug("KEYMAP_TAP_KEY: Tap: unregister_code\n");
+                            unregister_code(action.layer.code);
+                        } else {
+                            debug("KEYMAP_TAP_KEY: No tap: Off on release\n");
+                            keymap_off(action.layer.val);
                         }
-                        unregister_code(action.layer.code);
                     }
                     break;
             }
             break;
-        case ACT_LAYER_RELEASED:
+
+        case ACT_OVERLAY:
             switch (action.layer.code) {
-                case 0x00:
+                // Overlay Invert bit4
+                case OP_INV4 | 0:
+                    if (action.layer.val == 0) {
+                        // NOTE: reserved for future use
+                        overlay_clear();
+                    } else {
+                        overlay_set(overlay_stat ^ action.layer.val);
+                    }
+                    break;
+                case OP_INV4 | 1:
+                    if (action.layer.val == 0) {
+                        // on pressed
+                        if (event.pressed) overlay_clear();
+                    } else {
+                        overlay_set(overlay_stat ^ action.layer.val<<4);
+                    }
+                    break;
+                case OP_INV4 | 2:
+                    if (action.layer.val == 0) {
+                        // on released
+                        if (!event.pressed) overlay_clear();
+                    } else {
+                        overlay_set(overlay_stat ^ action.layer.val<<8);
+                    }
+                    break;
+                case OP_INV4 | 3:
+                    if (action.layer.val == 0) {
+                        // on both
+                        overlay_clear();
+                    } else {
+                        overlay_set(overlay_stat ^ action.layer.val<<12);
+                    }
+                    break;
+
+                /* Overlay Bit invert */
+                case OP_INV:
+                    /* with tap toggle */
                     if (event.pressed) {
-                        layer_switch(action.layer.opt);
+                        if (tap_count < TAPPING_TOGGLE) {
+                            debug("OVERLAY_INV: tap toggle(press).\n");
+                            overlay_invert(action.layer.val);
+                        }
+                    } else {
+                        if (tap_count <= TAPPING_TOGGLE) {
+                            debug("OVERLAY_INV: tap toggle(release).\n");
+                            overlay_invert(action.layer.val);
+                        }
                     }
                     break;
-                case 0xF0:
-                    // Ignored. LAYER_RELEASED with tap toggle is invalid action.
+                case (OP_INV | ON_PRESS):
+                    if (event.pressed) {
+                        overlay_invert(action.layer.val);
+                    }
                     break;
-                case 0xFF:
+                case (OP_INV | ON_RELEASE):
                     if (!event.pressed) {
-                        default_layer = action.layer.opt;
-                        layer_switch(default_layer);
+                        overlay_invert(action.layer.val);
                     }
                     break;
-                default:
-                    // Ignored. LAYER_RELEASED with tap key is invalid action.
+                case (OP_INV | ON_BOTH):
+                    overlay_invert(action.layer.val);
                     break;
-            }
-            break;
-        case ACT_LAYER_BIT:
-            switch (action.layer.code) {
-                case 0x00:
+
+                /* Overlay Bit on */
+                case OP_ON:
                     if (event.pressed) {
-                        layer_switch(current_layer | action.layer.opt);
+                        overlay_on(action.layer.val);
                     } else {
-                        layer_switch(current_layer & ~action.layer.opt);
+                        overlay_off(action.layer.val);
+                    }
+                    break;
+                case (OP_ON | ON_PRESS):
+                    if (event.pressed) {
+                        overlay_on(action.layer.val);
+                    }
+                    break;
+                case (OP_ON | ON_RELEASE):
+                    if (!event.pressed) {
+                        overlay_on(action.layer.val);
                     }
                     break;
-                case 0xF0:
-                    // TODO: tap toggle
+                case (OP_ON | ON_BOTH):
+                    overlay_on(action.layer.val);
                     break;
-                case 0xFF:
-                    // change default layer
+
+                /* Overlay Bit off */
+                case OP_OFF:
                     if (event.pressed) {
-                        default_layer = current_layer | action.layer.opt;
-                        layer_switch(default_layer);
+                        overlay_off(action.layer.val);
                     } else {
-                        default_layer = current_layer & ~action.layer.opt;
-                        layer_switch(default_layer);
+                        overlay_on(action.layer.val);
                     }
                     break;
-                default:
-                    // with tap key
-                    debug("tap: "); debug_hex(tap_count); debug("\n");
+                case (OP_OFF | ON_PRESS):
                     if (event.pressed) {
-                        if (tap_count == 0) {
-                            if (host_has_anykey()) {
-                                register_code(action.layer.code);
-                            } else {
-                                delaying_layer = (keyrecord_t){
-                                    .event = event,
-                                    .action = action,
-                                    .mods = keyboard_report->mods
-                                };
-                            }
-                        } else if (tap_count > 0) {
-                            register_code(action.layer.code);
-                        }
+                        overlay_off(action.layer.val);
+                    }
+                    break;
+                case (OP_OFF | ON_RELEASE):
+                    if (!event.pressed) {
+                        overlay_off(action.layer.val);
+                    }
+                    break;
+                case (OP_OFF | ON_BOTH):
+                    overlay_off(action.layer.val);
+                    break;
+
+                /* Overlay Bit set */
+                case OP_SET:
+                    if (event.pressed) {
+                        overlay_move(action.layer.val);
                     } else {
-                        if (tap_count == 0) {
-                            // no tap
-                            layer_switch(current_layer & ~action.layer.opt);
-                        } else if (tap_count == 1) {
-                            // tap
-                            register_code(action.layer.code);
-                        }
-                        unregister_code(action.layer.code);
+                        overlay_clear();
                     }
                     break;
-            }
-        case ACT_LAYER_EXT:
-            switch (action.layer.opt) {
-                case 0x00:
-                    // set default layer when pressed
-                    switch (action.layer.code) {
-                        case 0x00:
-                            if (event.pressed) {
-                                layer_switch(default_layer);
-                            }
-                            break;
-                        case 0xF0:
-                            // TODO: tap toggle
-                            break;
-                        case 0xFF:
-                            if (event.pressed) {
-                                default_layer = current_layer;
-                                layer_switch(default_layer);
-                            }
-                            break;
-                        default:
-                            // TODO: tap key
-                            break;
+                case (OP_SET | ON_PRESS):
+                    if (event.pressed) {
+                        overlay_move(action.layer.val);
                     }
                     break;
-                case 0x01:
-                    // set default layer when released
-                    switch (action.layer.code) {
-                        case 0x00:
-                            if (!event.pressed) {
-                                layer_switch(default_layer);
-                            }
-                            break;
-                        case 0xFF:
-                            if (!event.pressed) {
-                                default_layer = current_layer;
-                                layer_switch(default_layer);
-                            }
-                            break;
-                        case 0xF0:
-                        default:
-                            // Ignore tap.
-                            if (!event.pressed) {
-                                layer_switch(default_layer);
-                            }
-                            break;
+                case (OP_SET | ON_RELEASE):
+                    if (!event.pressed) {
+                        overlay_move(action.layer.val);
+                    }
+                    break;
+                case (OP_SET | ON_BOTH):
+                    overlay_move(action.layer.val);
+                    break;
+
+                /* Overlay Bit invert with tap key */
+                default:
+                    if (event.pressed) {
+                        if (tap_count > 0) {
+                            debug("OVERLAY_TAP_KEY: Tap: register_code\n");
+                            register_code(action.layer.code);
+                        } else {
+                            debug("OVERLAY_TAP_KEY: No tap: On on press\n");
+                            overlay_on(action.layer.val);
+                        }
+                    } else {
+                        if (tap_count > 0) {
+                            debug("OVERLAY_TAP_KEY: Tap: unregister_code\n");
+                            unregister_code(action.layer.code);
+                        } else {
+                            debug("OVERLAY_TAP_KEY: No tap: Off on release\n");
+                            overlay_off(action.layer.val);
+                        }
                     }
                     break;
             }
             break;
+
+        /* Extentions */
         case ACT_MACRO:
+            action_macro_play(action_get_macro(record, action.func.id, action.func.opt));
+            break;
         case ACT_COMMAND:
+            break;
         case ACT_FUNCTION:
+            action_function(record, action.func.id, action.func.opt);
+            break;
         default:
             break;
     }
+}
+
+/* Tapping
+ *
+ * Rule: Tap key is typed(pressed and released) within TAPPING_TERM.
+ *       (without interfering by typing other key)
+ */
+/* return true when key event is processed or consumed. */
+static bool process_tapping(keyrecord_t *keyp)
+{
+    keyevent_t event = keyp->event;
 
-    /* last event */
-    last_event = event;
-    last_event_time = timer_read();
+    // if tapping
+    if (IS_TAPPING_PRESSED()) {
+        if (WITHIN_TAPPING_TERM(event)) {
+            if (tapping_key.tap.count == 0) {
+                if (IS_TAPPING_KEY(event.key) && !event.pressed) {
+                    // first tap!
+                    debug("Tapping: First tap(0->1).\n");
+                    tapping_key.tap.count = 1;
+                    tapping_key.tap.interrupted  = (waiting_buffer_has_anykey_pressed() ? true : false);
+                    debug_tapping_key();
+                    process_action(&tapping_key);
+
+                    // enqueue
+                    keyp->tap = tapping_key.tap;
+                    return false;
+                }
+#if TAPPING_TERM >= 500
+                /* This can prevent from typing some tap keys in a row at a time. */
+                else if (!event.pressed && waiting_buffer_typed(event)) {
+                    // other key typed. not tap.
+                    debug("Tapping: End. No tap. Interfered by typing key\n");
+                    process_action(&tapping_key);
+                    tapping_key = (keyrecord_t){};
+                    debug_tapping_key();
+
+                    // enqueue
+                    return false;
+                }
+#endif
+                else {
+                    // other key events shall be enq'd till tapping state settles.
+                    return false;
+                }
+            }
+            // tap_count > 0
+            else {
+                if (IS_TAPPING_KEY(event.key) && !event.pressed) {
+                    debug("Tapping: Tap release("); debug_dec(tapping_key.tap.count); debug(")\n");
+                    keyp->tap = tapping_key.tap;
+                    process_action(keyp);
+                    tapping_key = *keyp;
+                    debug_tapping_key();
+                    return true;
+                }
+                else if (is_tap_key(keyp->event.key) && event.pressed) {
+                    if (tapping_key.tap.count > 1) {
+                        debug("Tapping: Start new tap with releasing last tap(>1).\n");
+                        // unregister key
+                        process_action(&(keyrecord_t){
+                                .tap = tapping_key.tap,
+                                .event.key = tapping_key.event.key,
+                                .event.time = event.time,
+                                .event.pressed = false
+                        });
+                    } else {
+                        debug("Tapping: Start while last tap(1).\n");
+                    }
+                    tapping_key = *keyp;
+                    waiting_buffer_scan_tap();
+                    debug_tapping_key();
+                    return true;
+                }
+                else {
+                    if (!IS_NOEVENT(keyp->event)) {
+                        debug("Tapping: key event while last tap(>0).\n");
+                    }
+                    process_action(keyp);
+                    return true;
+                }
+            }
+        }
+        // after TAPPING_TERM
+        else {
+            if (tapping_key.tap.count == 0) {
+                debug("Tapping: End. Timeout. Not tap(0): ");
+                debug_event(event); debug("\n");
+                process_action(&tapping_key);
+                tapping_key = (keyrecord_t){};
+                debug_tapping_key();
+                return false;
+            }  else {
+                if (IS_TAPPING_KEY(event.key) && !event.pressed) {
+                    debug("Tapping: End. last timeout tap release(>0).");
+                    keyp->tap = tapping_key.tap;
+                    process_action(keyp);
+                    tapping_key = (keyrecord_t){};
+                    return true;
+                }
+                else if (is_tap_key(keyp->event.key) && event.pressed) {
+                    if (tapping_key.tap.count > 1) {
+                        debug("Tapping: Start new tap with releasing last timeout tap(>1).\n");
+                        // unregister key
+                        process_action(&(keyrecord_t){
+                                .tap = tapping_key.tap,
+                                .event.key = tapping_key.event.key,
+                                .event.time = event.time,
+                                .event.pressed = false
+                        });
+                    } else {
+                        debug("Tapping: Start while last timeout tap(1).\n");
+                    }
+                    tapping_key = *keyp;
+                    waiting_buffer_scan_tap();
+                    debug_tapping_key();
+                    return true;
+                }
+                else {
+                    if (!IS_NOEVENT(keyp->event)) {
+                        debug("Tapping: key event while last timeout tap(>0).\n");
+                    }
+                    process_action(keyp);
+                    return true;
+                }
+            }
+        }
+    } else if (IS_TAPPING_RELEASED()) {
+        if (WITHIN_TAPPING_TERM(event)) {
+            if (tapping_key.tap.count > 0 && IS_TAPPING_KEY(event.key) && event.pressed) {
+                // sequential tap.
+                keyp->tap = tapping_key.tap;
+                keyp->tap.count += 1;
+                debug("Tapping: Tap press("); debug_dec(keyp->tap.count); debug(")\n");
+                process_action(keyp);
+                tapping_key = *keyp;
+                debug_tapping_key();
+                return true;
+            } else if (event.pressed && is_tap_key(event.key)) {
+                // Sequential tap can be interfered with other tap key.
+                debug("Tapping: Start with interfering other tap.\n");
+                tapping_key = *keyp;
+                waiting_buffer_scan_tap();
+                debug_tapping_key();
+                return true;
+            } else {
+                if (!IS_NOEVENT(keyp->event)) debug("Tapping: other key just after tap.\n");
+                process_action(keyp);
+                return true;
+            }
+        } else {
+            // timeout. no sequential tap.
+            debug("Tapping: End(Timeout after releasing last tap): ");
+            debug_event(event); debug("\n");
+            tapping_key = (keyrecord_t){};
+            debug_tapping_key();
+            return false;
+        }
+    }
+    // not tapping satate
+    else {
+        if (event.pressed && is_tap_key(event.key)) {
+            debug("Tapping: Start(Press tap key).\n");
+            tapping_key = *keyp;
+            waiting_buffer_scan_tap();
+            debug_tapping_key();
+            return true;
+        } else {
+            process_action(keyp);
+            return true;
+        }
+    }
+}
+
+/* scan buffer for tapping */
+static void waiting_buffer_scan_tap(void)
+{
+    // tapping already is settled
+    if (tapping_key.tap.count > 0) return;
+    // invalid state: tapping_key released && tap.count == 0
+    if (!tapping_key.event.pressed) return;
+
+    for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
+        if (IS_TAPPING_KEY(waiting_buffer[i].event.key) &&
+                !waiting_buffer[i].event.pressed &&
+                WITHIN_TAPPING_TERM(waiting_buffer[i].event)) {
+            tapping_key.tap.count = 1;
+            waiting_buffer[i].tap.count = 1;
+            process_action(&tapping_key);
+
+            debug("waiting_buffer_scan_tap: found at ["); debug_dec(i); debug("]\n");
+            debug_waiting_buffer();
+            return;
+        }
+    }
 }
 
 
-static void register_code(uint8_t code)
+
+/*
+ * Utilities for actions.
+ */
+void register_code(uint8_t code)
 {
     if (code == KC_NO) {
         return;
     }
+#ifdef CAPSLOCK_LOCKING_ENABLE
+    else if (KC_LOCKING_CAPS == code) {
+#ifdef CAPSLOCK_LOCKING_RESYNC_ENABLE
+        // Resync: ignore if caps lock already is on
+        if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) return;
+#endif
+        host_add_key(KC_CAPSLOCK);
+        host_send_keyboard_report();
+        host_del_key(KC_CAPSLOCK);
+        host_send_keyboard_report();
+    }
+#endif
     else if IS_KEY(code) {
         // TODO: should push command_proc out of this block?
-        if (!command_proc(code)) {
+        if (command_proc(code)) return;
+
+        if (oneshot_state.mods && oneshot_state.ready && !oneshot_state.disabled) {
+            uint8_t tmp_mods = host_get_mods();
+            host_add_mods(oneshot_state.mods);
+            host_add_key(code);
+            host_send_keyboard_report();
+
+            host_set_mods(tmp_mods);
+            oneshot_state.ready = false;
+        } else {
             host_add_key(code);
             host_send_keyboard_report();
         }
@@ -397,9 +925,24 @@ static void register_code(uint8_t code)
     }
 }
 
-static void unregister_code(uint8_t code)
+void unregister_code(uint8_t code)
 {
-    if IS_KEY(code) {
+    if (code == KC_NO) {
+        return;
+    }
+#ifdef CAPSLOCK_LOCKING_ENABLE
+    else if (KC_LOCKING_CAPS == code) {
+#ifdef CAPSLOCK_LOCKING_RESYNC_ENABLE
+        // Resync: ignore if caps lock already is off
+        if (!(host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK))) return;
+#endif
+        host_add_key(KC_CAPSLOCK);
+        host_send_keyboard_report();
+        host_del_key(KC_CAPSLOCK);
+        host_send_keyboard_report();
+    }
+#endif
+    else if IS_KEY(code) {
         host_del_key(code);
         host_send_keyboard_report();
     }
@@ -409,27 +952,35 @@ static void unregister_code(uint8_t code)
     }
 }
 
-static void register_mods(uint8_t mods)
+void add_mods(uint8_t mods)
 {
-    if (!mods) return;
-    host_add_mods(mods);
-    host_send_keyboard_report();
+    if (mods) {
+        host_add_mods(mods);
+        host_send_keyboard_report();
+    }
+}
+
+void del_mods(uint8_t mods)
+{
+    if (mods) {
+        host_del_mods(mods);
+        host_send_keyboard_report();
+    }
 }
 
-static void unregister_mods(uint8_t mods)
+void set_mods(uint8_t mods)
 {
-    if (!mods) return;
-    host_del_mods(mods);
+    host_set_mods(mods);
     host_send_keyboard_report();
 }
 
-static void clear_keyboard(void)
+void clear_keyboard(void)
 {
     host_clear_mods();
     clear_keyboard_but_mods();
 }
 
-static void clear_keyboard_but_mods(void)
+void clear_keyboard_but_mods(void)
 {
     host_clear_keys();
     host_send_keyboard_report();
@@ -443,13 +994,83 @@ static void clear_keyboard_but_mods(void)
 #endif
 }
 
-static void layer_switch(uint8_t new_layer)
+bool sending_anykey(void)
+{
+    return (host_has_anykey() || host_mouse_in_use() ||
+            host_last_sysytem_report() || host_last_consumer_report());
+}
+
+bool is_tap_key(key_t key)
 {
-    if (current_layer != new_layer) {
-        Kdebug("Layer Switch: "); Kdebug_hex(current_layer);
-        Kdebug(" -> "); Kdebug_hex(new_layer); Kdebug("\n");
+    action_t action = layer_switch_get_action(key);
 
-        current_layer = new_layer;
-        clear_keyboard_but_mods(); // To avoid stuck keys
+    switch (action.kind.id) {
+        case ACT_LMODS_TAP:
+        case ACT_RMODS_TAP:
+            return true;
+        case ACT_KEYMAP:
+        case ACT_OVERLAY:
+            switch (action.layer.code) {
+                case 0x04 ... 0xEF:    /* tap key */
+                case OP_INV:
+                    return true;
+                default:
+                    return false;
+            }
+        case ACT_MACRO:
+        case ACT_FUNCTION:
+            if (action.func.opt & FUNC_TAP) { return true; }
+            return false;
+    }
+    return false;
+}
+
+
+/*
+ * debug print
+ */
+static void debug_event(keyevent_t event)
+{
+    debug_hex16((event.key.row<<8) | event.key.col);
+    if (event.pressed) debug("d("); else debug("u(");
+    debug_dec(event.time); debug(")");
+}
+static void debug_record(keyrecord_t record)
+{
+    debug_event(record.event); debug(":"); debug_dec(record.tap.count);
+    if (record.tap.interrupted) debug("-");
+}
+static void debug_action(action_t action)
+{
+    switch (action.kind.id) {
+        case ACT_LMODS:             debug("ACT_LMODS");             break;
+        case ACT_RMODS:             debug("ACT_RMODS");             break;
+        case ACT_LMODS_TAP:         debug("ACT_LMODS_TAP");         break;
+        case ACT_RMODS_TAP:         debug("ACT_RMODS_TAP");         break;
+        case ACT_USAGE:             debug("ACT_USAGE");             break;
+        case ACT_MOUSEKEY:          debug("ACT_MOUSEKEY");          break;
+        case ACT_KEYMAP:            debug("ACT_KEYMAP");            break;
+        case ACT_OVERLAY:           debug("ACT_OVERLAY");           break;
+        case ACT_MACRO:             debug("ACT_MACRO");             break;
+        case ACT_COMMAND:           debug("ACT_COMMAND");           break;
+        case ACT_FUNCTION:          debug("ACT_FUNCTION");          break;
+        default:                    debug("UNKNOWN");               break;
+    }
+    debug("[");
+    debug_hex4(action.kind.param>>8);
+    debug(":");
+    debug_hex8(action.kind.param & 0xff);
+    debug("]");
+}
+static void debug_tapping_key(void)
+{
+    debug("TAPPING_KEY="); debug_record(tapping_key); debug("\n");
+}
+static void debug_waiting_buffer(void)
+{
+    debug("{ ");
+    for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
+        debug("["); debug_dec(i); debug("]="); debug_record(waiting_buffer[i]); debug(" ");
     }
+    debug("}\n");
 }