common/action.c

   1 #include "host.h"
   2 #include "timer.h"
   3 #include "keymap.h"
   4 #include "keycode.h"
   5 #include "keyboard.h"
   6 #include "mousekey.h"
   7 #include "command.h"
   8 #include "util.h"
   9 #include "debug.h"
  10 #include "action.h"
  11
  12 #define Kdebug(s)       do { if (debug_keyboard) debug(s); } while(0)
  13 #define Kdebug_P(s)     do { if (debug_keyboard) debug_P(s); } while(0)
  14 #define Kdebug_hex(s)   do { if (debug_keyboard) debug_hex(s); } while(0)
  15
  16
  17 /*
  18  *
  19  * Event/State|IDLE          PRESSING      DELAYING[f]      WAITING[f,k]
  20  * -----------+------------------------------------------------------------------
  21  * Fn  Down   |(L+)          -*1           WAITING(Sk)      IDLE(Rf,Ps)*7
  22  *     Up     |(L-)          IDLE(L-)*8    IDLE(L-)*8       IDLE(L-)*8
  23  * Fnk Down   |DELAYING(Sf)* (Rf)          WAITING(Sk)      IDLE(Rf,Ps,Rf)
  24  *     Up     |(L-)          IDLE(L-/Uf)*8 IDLE(Rf,Uf/L-)*3 IDLE(Rf,Ps,Uf/L-)*3
  25  * Key Down   |PRESSING(Rk)  (Rk)          WAITING(Sk)      IDLE(Rf,Ps,Rk)
  26  *     Up     |(Uk)          IDLE(Uk)*4    (Uk)             IDLE(L+,Ps,Pk)/(Uk)*a
  27  *            |
  28  * Delay      |-             -             IDLE(L+)         IDLE(L+,Ps)
  29  * Magic Key  |COMMAND*5
  30  *
  31  * *1: ignore Fn if other key is down.
  32  * *2: register Fnk if any key is pressing
  33  * *3: register/unregister delayed Fnk and move to IDLE if code == delayed Fnk, else *8
  34  * *4: if no keys registered to host
  35  * *5: unregister all keys
  36  * *6: only if no keys down
  37  * *7: ignore Fn because Fnk key and stored key are down.
  38  * *8: move to IDLE if layer switch(off) occurs, else stay at current state
  39  * *9: repeat key if pressing Fnk twice quickly(move to PRESSING)
  40  * *a: layer switch and process waiting key and code if code == wainting key, else unregister key
  41  *
  42  * States:
  43  *      IDLE: No key is down except modifiers
  44  *      DELAYING: delay layer switch after pressing Fn with alt keycode
  45  *      WAITING: key is pressed during DELAYING
  46  *
  47  * Events:
  48  *      Fn: Fn key without alternative keycode
  49  *      Fnk: Fn key with alternative keycode
  50  *      -: ignore
  51  *      Delay: layer switch delay term is elapsed
  52  *
  53  * Actions:
  54  *      Rk: register key
  55  *      Uk: unregister key
  56  *      Rf: register Fn(alt keycode)
  57  *      Uf: unregister Fn(alt keycode)
  58  *      Rs: register stored key
  59  *      Us: unregister stored key
  60  *      Sk: Store key(waiting Key)
  61  *      Sf: Store Fn(delayed Fn)
  62  *      Ps: Process stored key
  63  *      Ps: Process key
  64  *      Is: Interpret stored keys in current layer
  65  *      L+: Switch to new layer(*unregister* all keys but modifiers)
  66  *      L-: Switch back to last layer(*unregister* all keys but modifiers)
  67  *      Ld: Switch back to default layer(*unregister* all keys but modifiers)
  68  */
  69
  70
  71 typedef enum { IDLE, DELAYING, WAITING, PRESSING } kbdstate_t;
  72 #define NEXT(state)     do { \
  73     Kdebug("NEXT: "); Kdebug_P(state_str(kbdstate)); \
  74     kbdstate = state; \
  75     Kdebug(" -> "); Kdebug_P(state_str(kbdstate)); Kdebug("\n"); \
  76 } while (0)
  77
  78
  79 static kbdstate_t kbdstate = IDLE;
  80 static uint8_t fn_state_bits = 0;
  81
  82 static const char *state_str(kbdstate_t state)
  83 {
  84     if (state == IDLE)      return PSTR("IDLE");
  85     if (state == DELAYING)  return PSTR("DELAYING");
  86     if (state == WAITING)   return PSTR("WAITING");
  87     if (state == PRESSING)  return PSTR("PRESSING");
  88     return PSTR("UNKNOWN");
  89 }
  90 static bool anykey_sent_to_host(void)
  91 {
  92     return (host_has_anykey() || host_mouse_in_use() ||
  93             host_last_sysytem_report() || host_last_consumer_report());
  94 }
  95
  96
  97 static void register_code(uint8_t code);
  98 static void unregister_code(uint8_t code);
  99 static void register_mods(uint8_t mods);
 100 static void unregister_mods(uint8_t mods);
 101 static void clear_keyboard(void);
 102 static void clear_keyboard_but_mods(void);
 103 static void layer_switch(uint8_t new_layer);
 104
 105
 106 /* tap */
 107 #define TAP_TIME    200
 108 #define LAYER_DELAY 200
 109 static keyevent_t last_event = {};
 110 static uint16_t last_event_time = 0;
 111 static uint8_t tap_count = 0;
 112
 113 /* layer */
 114 uint8_t default_layer = 0;
 115 uint8_t current_layer = 0;
 116 keyrecord_t delaying_layer = {};
 117
 118 keyrecord_t waiting_key = {};
 119
 120 // TODO: ring buffer: waiting_keys[]
 121 /*
 122 #define WAITING_KEYS_BUFFER 3
 123 static keyrecord_t waiting_keys[WAITING_KEYS_BUFFER] = {};
 124 static uint8_t waiting_keys_head = 0;
 125 static uint8_t waiting_keys_tail = 0;
 126 static void waiting_key_queue(keyevent_t event)
 127 {
 128 }
 129 static void waiting_key_dequeue(keyevent_t event)
 130 {
 131 }
 132 */
 133
 134 static void process(keyevent_t event, action_t action)
 135 {
 136     //action_t action = keymap_get_action(current_layer, event.key.row, event.key.col);
 137
 138     debug("action: "); debug_hex16(action.code); debug("\n");
 139     debug("kind.id: "); debug_hex(action.kind.id); debug("\n");
 140     debug("kind.param: "); debug_hex16(action.kind.param); debug("\n");
 141     debug("key.code: "); debug_hex(action.key.code); debug("\n");
 142     debug("key.mods: "); debug_hex(action.key.mods); debug("\n");
 143
 144     switch (action.kind.id) {
 145         /* Key and Mods */
 146         case ACT_LMODS:
 147             // normal key or key plus mods
 148             if (event.pressed) {
 149                 uint8_t tmp_mods = host_get_mods();
 150                 if (action.key.mods) {
 151                     host_add_mods(action.key.mods);
 152                     host_send_keyboard_report();
 153                 }
 154                 register_code(action.key.code);
 155                 if (action.key.mods && action.key.code) {
 156                     host_set_mods(tmp_mods);
 157                     host_send_keyboard_report();
 158                 }
 159             } else {
 160                 if (action.key.mods && !action.key.code) {
 161                     host_del_mods(action.key.mods);
 162                     host_send_keyboard_report();
 163                 }
 164                 unregister_code(action.key.code);
 165             }
 166             break;
 167         case ACT_RMODS:
 168             if (event.pressed) {
 169                 uint8_t tmp_mods = host_get_mods();
 170                 if (action.key.mods) {
 171                     host_add_mods(action.key.mods<<4);
 172                     host_send_keyboard_report();
 173                 }
 174                 register_code(action.key.code);
 175                 if (action.key.mods && action.key.code) {
 176                     host_set_mods(tmp_mods);
 177                     host_send_keyboard_report();
 178                 }
 179             } else {
 180                 if (action.key.mods && !action.key.code) {
 181                     host_del_mods(action.key.mods<<4);
 182                     host_send_keyboard_report();
 183                 }
 184                 unregister_code(action.key.code);
 185             }
 186             break;
 187         case ACT_LMOD_TAP:
 188             break;
 189         case ACT_RMOD_TAP:
 190             break;
 191
 192         /* other HID usage */
 193         case ACT_USAGE:
 194 #ifdef EXTRAKEY_ENABLE
 195             switch (action.usage.page) {
 196                 case ACTION_USAGE_PAGE_SYSTEM:
 197                     if (event.pressed) {
 198                         host_system_send(action.usage.code);
 199                     } else {
 200                         host_system_send(0);
 201                     }
 202                     break;
 203                 case ACTION_USAGE_PAGE_CONSUMER:
 204                     if (event.pressed) {
 205                         host_consumer_send(action.usage.code);
 206                     } else {
 207                         host_consumer_send(0);
 208                     }
 209                     break;
 210             }
 211 #endif
 212             break;
 213
 214         /* Mouse key */
 215         case ACT_MOUSEKEY:
 216 #ifdef MOUSEKEY_ENABLE
 217             if (event.pressed) {
 218                 mousekey_on(action.key.code);
 219                 mousekey_send();
 220             } else {
 221                 mousekey_off(action.key.code);
 222                 mousekey_send();
 223             }
 224 #endif
 225             break;
 226
 227         /* Layer key */
 228         case ACT_LAYER_PRESSED:
 229             // layer action when pressed
 230             switch (action.layer.code) {
 231                 case 0x00:
 232                     if (event.pressed) {
 233                         layer_switch(action.layer.opt);
 234                     }
 235                     break;
 236                 case 0xF0:
 237                     // TODO: tap toggle
 238                     break;
 239                 case 0xFF:
 240                     if (event.pressed) {
 241                         default_layer = action.layer.opt;
 242                         layer_switch(default_layer);
 243                     }
 244                     break;
 245                 default:
 246                     // with tap key
 247                     debug("tap: "); debug_hex(tap_count); debug("\n");
 248                     if (event.pressed) {
 249                         if (tap_count == 0) {
 250                             if (host_has_anykey()) {
 251                                 register_code(action.layer.code);
 252                             } else {
 253                                 delaying_layer = (keyrecord_t){
 254                                     .event = event,
 255                                     .action = action,
 256                                     .mods = host_get_mods()
 257                                 };
 258                             }
 259                         } else if (tap_count > 0) {
 260                             register_code(action.layer.code);
 261                         }
 262                     } else {
 263                         // tap key
 264                         if (KEYEQ(event.key, delaying_layer.event.key) &&
 265                                 timer_elapsed(delaying_layer.event.time) < TAP_TIME) {
 266                             uint8_t tmp_mods = host_get_mods();
 267                             host_set_mods(delaying_layer.mods);
 268                             register_code(delaying_layer.action.layer.code);
 269                             host_set_mods(tmp_mods);
 270                             unregister_code(delaying_layer.action.layer.code);
 271                         } else {
 272                             unregister_code(action.layer.code);
 273                         }
 274                         delaying_layer = (keyrecord_t){};
 275                     }
 276                     break;
 277             }
 278             break;
 279         case ACT_LAYER_RELEASED:
 280             switch (action.layer.code) {
 281                 case 0x00:
 282                     if (event.pressed) {
 283                         layer_switch(action.layer.opt);
 284                     }
 285                     break;
 286                 case 0xF0:
 287                     // Ignored. LAYER_RELEASED with tap toggle is invalid action.
 288                     break;
 289                 case 0xFF:
 290                     if (!event.pressed) {
 291                         default_layer = action.layer.opt;
 292                         layer_switch(default_layer);
 293                     }
 294                     break;
 295                 default:
 296                     // Ignored. LAYER_RELEASED with tap key is invalid action.
 297                     break;
 298             }
 299             break;
 300         case ACT_LAYER_BIT:
 301             switch (action.layer.code) {
 302                 case 0x00:
 303                     if (event.pressed) {
 304                         layer_switch(current_layer | action.layer.opt);
 305                     } else {
 306                         layer_switch(current_layer & ~action.layer.opt);
 307                     }
 308                     break;
 309                 case 0xF0:
 310                     // TODO: tap toggle
 311                     break;
 312                 case 0xFF:
 313                     // change default layer
 314                     if (event.pressed) {
 315                         default_layer = current_layer | action.layer.opt;
 316                         layer_switch(default_layer);
 317                     } else {
 318                         default_layer = current_layer & ~action.layer.opt;
 319                         layer_switch(default_layer);
 320                     }
 321                     break;
 322                 default:
 323                     // with tap key
 324                     debug("tap: "); debug_hex(tap_count); debug("\n");
 325                     if (event.pressed) {
 326                         if (tap_count == 0) {
 327                             if (host_has_anykey()) {
 328                                 register_code(action.layer.code);
 329                             } else {
 330                                 delaying_layer = (keyrecord_t){
 331                                     .event = event,
 332                                     .action = action,
 333                                     .mods = keyboard_report->mods
 334                                 };
 335                             }
 336                         } else if (tap_count > 0) {
 337                             register_code(action.layer.code);
 338                         }
 339                     } else {
 340                         if (tap_count == 0) {
 341                             // no tap
 342                             layer_switch(current_layer & ~action.layer.opt);
 343                         } else if (tap_count == 1) {
 344                             // tap
 345                             register_code(action.layer.code);
 346                         }
 347                         unregister_code(action.layer.code);
 348                     }
 349                     break;
 350             }
 351         case ACT_LAYER_EXT:
 352             switch (action.layer.opt) {
 353                 case 0x00:
 354                     // set default layer when pressed
 355                     switch (action.layer.code) {
 356                         case 0x00:
 357                             if (event.pressed) {
 358                                 layer_switch(default_layer);
 359                             }
 360                             break;
 361                         case 0xF0:
 362                             // TODO: tap toggle
 363                             break;
 364                         case 0xFF:
 365                             if (event.pressed) {
 366                                 default_layer = current_layer;
 367                                 layer_switch(default_layer);
 368                             }
 369                             break;
 370                         default:
 371                             // TODO: tap key
 372                             break;
 373                     }
 374                     break;
 375                 case 0x01:
 376                     // set default layer when released
 377                     switch (action.layer.code) {
 378                         case 0x00:
 379                             if (!event.pressed) {
 380                                 layer_switch(default_layer);
 381                             }
 382                             break;
 383                         case 0xFF:
 384                             if (!event.pressed) {
 385                                 default_layer = current_layer;
 386                                 layer_switch(default_layer);
 387                             }
 388                             break;
 389                         case 0xF0:
 390                         default:
 391                             // Ignore tap.
 392                             if (!event.pressed) {
 393                                 layer_switch(default_layer);
 394                             }
 395                             break;
 396                     }
 397                     break;
 398             }
 399             break;
 400
 401         /* Extentions */
 402         case ACT_MACRO:
 403         case ACT_COMMAND:
 404         case ACT_FUNCTION:
 405         default:
 406             break;
 407     }
 408 }
 409
 410 void action_exec(keyevent_t event)
 411 {
 412     /* count tap when key is up */
 413     if (KEYEQ(event.key, last_event.key) && timer_elapsed(last_event_time) < TAP_TIME) {
 414         if (!event.pressed) tap_count++;
 415     } else {
 416         tap_count = 0;
 417     }
 418
 419     /* When delaying layer switch */
 420     if (delaying_layer.action.code) {
 421         /* Layer switch when delay time elapses or waiting key is released */
 422         if ((timer_elapsed(delaying_layer.event.time) > LAYER_DELAY) ||
 423             (!event.pressed && KEYEQ(event.key, waiting_key.event.key))) {
 424             /* layer switch */
 425             switch (delaying_layer.action.kind.id) {
 426                 case ACT_LAYER_PRESSED:
 427                     layer_switch(delaying_layer.action.layer.opt);
 428                     break;
 429                 case ACT_LAYER_BIT:
 430                     layer_switch(current_layer | delaying_layer.action.layer.opt);
 431                     break;
 432             }
 433             delaying_layer = (keyrecord_t){};
 434
 435             /* Process waiting keys in new layer */
 436             if (waiting_key.event.time) {
 437                 uint8_t tmp_mods = host_get_mods();
 438                 host_set_mods(waiting_key.mods);
 439                 process(waiting_key.event, keymap_get_action(current_layer,
 440                                                              waiting_key.event.key.row,
 441                                                              waiting_key.event.key.col));
 442                 host_set_mods(tmp_mods);
 443                 waiting_key = (keyrecord_t){};
 444             }
 445         }
 446         /* when delaying layer key is released within delay term */
 447         else if (!event.pressed && KEYEQ(event.key, delaying_layer.event.key)) {
 448             /* tap key down */
 449             uint8_t tmp_mods = host_get_mods();
 450             host_set_mods(delaying_layer.mods);
 451             register_code(delaying_layer.action.layer.code);
 452             delaying_layer = (keyrecord_t){};
 453
 454             /* process waiting keys */
 455             if (waiting_key.event.time) {
 456                 host_set_mods(waiting_key.mods);
 457                 process(waiting_key.event, waiting_key.action);
 458                 waiting_key = (keyrecord_t){};
 459             }
 460             host_set_mods(tmp_mods);
 461         }
 462     }
 463
 464     action_t action = keymap_get_action(current_layer, event.key.row, event.key.col);
 465
 466     /* postpone key-down events while delaying layer */
 467     if (delaying_layer.action.code) {
 468         if (event.pressed) {
 469             // TODO: waiting_keys[]
 470             waiting_key = (keyrecord_t){
 471                 .event = event,
 472                 .action = action,
 473                 .mods = host_get_mods()
 474             };
 475         } else {
 476             process(event, action);
 477         }
 478     } else {
 479         process(event, action);
 480     }
 481
 482     /* last event */
 483     last_event = event;
 484     last_event_time = timer_read();
 485 }
 486
 487
 488 static void register_code(uint8_t code)
 489 {
 490     if (code == KC_NO) {
 491         return;
 492     }
 493     else if IS_KEY(code) {
 494         // TODO: should push command_proc out of this block?
 495         if (!command_proc(code)) {
 496             host_add_key(code);
 497             host_send_keyboard_report();
 498         }
 499     }
 500     else if IS_MOD(code) {
 501         host_add_mods(MOD_BIT(code));
 502         host_send_keyboard_report();
 503     }
 504 }
 505
 506 static void unregister_code(uint8_t code)
 507 {
 508     if IS_KEY(code) {
 509         host_del_key(code);
 510         host_send_keyboard_report();
 511     }
 512     else if IS_MOD(code) {
 513         host_del_mods(MOD_BIT(code));
 514         host_send_keyboard_report();
 515     }
 516 }
 517
 518 static void register_mods(uint8_t mods)
 519 {
 520     if (!mods) return;
 521     host_add_mods(mods);
 522     host_send_keyboard_report();
 523 }
 524
 525 static void unregister_mods(uint8_t mods)
 526 {
 527     if (!mods) return;
 528     host_del_mods(mods);
 529     host_send_keyboard_report();
 530 }
 531
 532 static void clear_keyboard(void)
 533 {
 534     host_clear_mods();
 535     clear_keyboard_but_mods();
 536 }
 537
 538 static void clear_keyboard_but_mods(void)
 539 {
 540     host_clear_keys();
 541     host_send_keyboard_report();
 542 #ifdef MOUSEKEY_ENABLE
 543     mousekey_clear();
 544     mousekey_send();
 545 #endif
 546 #ifdef EXTRAKEY_ENABLE
 547     host_system_send(0);
 548     host_consumer_send(0);
 549 #endif
 550 }
 551
 552 static void layer_switch(uint8_t new_layer)
 553 {
 554     if (current_layer != new_layer) {
 555         Kdebug("Layer Switch: "); Kdebug_hex(current_layer);
 556         Kdebug(" -> "); Kdebug_hex(new_layer); Kdebug("\n");
 557
 558         current_layer = new_layer;
 559         clear_keyboard_but_mods(); // To avoid stuck keys
 560         // TODO: update mods with full scan of matrix? if modifier changes between layers
 561     }
 562 }