common/action.c

   1 /*
   2 Copyright 2012,2013 Jun Wako <wakojun@gmail.com>
   3
   4 This program is free software: you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation, either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17 #include "host.h"
  18 #include "timer.h"
  19 #include "keymap.h"
  20 #include "keycode.h"
  21 #include "keyboard.h"
  22 #include "mousekey.h"
  23 #include "command.h"
  24 #include "util.h"
  25 #include "debug.h"
  26 #include "action.h"
  27
  28
  29 static void process_action(keyrecord_t *record);
  30 static bool process_tapping(keyrecord_t *record);
  31 static void waiting_buffer_scan_tap(void);
  32
  33 static void debug_event(keyevent_t event);
  34 static void debug_record(keyrecord_t record);
  35 static void debug_action(action_t action);
  36 static void debug_tapping_key(void);
  37 static void debug_waiting_buffer(void);
  38
  39
  40 /*
  41  * Tapping
  42  */
  43 /* period of tapping(ms) */
  44 #ifndef TAPPING_TERM
  45 #define TAPPING_TERM    200
  46 #endif
  47
  48 /* tap count needed for toggling a feature */
  49 #ifndef TAPPING_TOGGLE
  50 #define TAPPING_TOGGLE  5
  51 #endif
  52
  53 /* stores a key event of current tap. */
  54 static keyrecord_t tapping_key = {};
  55
  56 #define IS_TAPPING()            !IS_NOEVENT(tapping_key.event)
  57 #define IS_TAPPING_PRESSED()    (IS_TAPPING() && tapping_key.event.pressed)
  58 #define IS_TAPPING_RELEASED()   (IS_TAPPING() && !tapping_key.event.pressed)
  59 #define IS_TAPPING_KEY(k)       (IS_TAPPING() && KEYEQ(tapping_key.event.key, (k)))
  60 #define WITHIN_TAPPING_TERM(e)  (TIMER_DIFF_16(e.time, tapping_key.event.time) < TAPPING_TERM)
  61
  62
  63 /*
  64  * Waiting buffer
  65  *
  66  * stores key events waiting for settling current tap.
  67  */
  68 #define WAITING_BUFFER_SIZE 8
  69 static keyrecord_t waiting_buffer[WAITING_BUFFER_SIZE] = {};
  70
  71 /* point to empty cell to enq */
  72 static uint8_t waiting_buffer_head = 0;
  73
  74 /* point to the oldest data cell to deq */
  75 static uint8_t waiting_buffer_tail = 0;
  76
  77 static bool waiting_buffer_enq(keyrecord_t record)
  78 {
  79     if (IS_NOEVENT(record.event)) {
  80         return true;
  81     }
  82
  83     if ((waiting_buffer_head + 1) % WAITING_BUFFER_SIZE == waiting_buffer_tail) {
  84         debug("waiting_buffer_enq: Over flow.\n");
  85         return false;
  86     }
  87
  88     waiting_buffer[waiting_buffer_head] = record;
  89     waiting_buffer_head = (waiting_buffer_head + 1) % WAITING_BUFFER_SIZE;
  90
  91     debug("waiting_buffer_enq: "); debug_waiting_buffer();
  92     return true;
  93 }
  94
  95 static void waiting_buffer_clear(void)
  96 {
  97     waiting_buffer_head = 0;
  98     waiting_buffer_tail = 0;
  99 }
 100
 101 #if TAPPING_TERM >= 500
 102 static bool waiting_buffer_typed(keyevent_t event)
 103 {
 104     for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
 105         if (KEYEQ(event.key, waiting_buffer[i].event.key) && event.pressed !=  waiting_buffer[i].event.pressed) {
 106             return true;
 107         }
 108     }
 109     return false;
 110 }
 111 #endif
 112
 113 bool waiting_buffer_has_anykey_pressed(void)
 114 {
 115     for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
 116         if (waiting_buffer[i].event.pressed) return true;
 117     }
 118     return false;
 119 }
 120
 121
 122 /* Oneshot modifier
 123  *
 124  * Problem: Want to capitalize like 'The' but the result tends to be 'THe'.
 125  * Solution: Oneshot modifier have its effect on only one key coming next.
 126  *           Tap Shift, then type 't', 'h' and 'e'. Not need to hold Shift key.
 127  *
 128  *  Hold:       works as normal modifier.
 129  *  Tap:        one shot modifier.
 130  *  2 Tap:      cancel one shot modifier.
 131  *  5-Tap:      toggles enable/disable oneshot feature.
 132  */
 133 static struct {
 134     uint8_t mods;
 135     uint8_t time;
 136     bool    ready;
 137     bool    disabled;
 138 }   oneshot_state;
 139
 140 static void oneshot_start(uint8_t mods, uint16_t time)
 141 {
 142     oneshot_state.mods = mods;
 143     oneshot_state.time = time;
 144     oneshot_state.ready = true;
 145 }
 146
 147 static void oneshot_cancel(void)
 148 {
 149     oneshot_state.mods = 0;
 150     oneshot_state.time = 0;
 151     oneshot_state.ready = false;
 152 }
 153
 154 static void oneshot_toggle(void)
 155 {
 156     oneshot_state.disabled = !oneshot_state.disabled;
 157 }
 158
 159
 160
 161 void action_exec(keyevent_t event)
 162 {
 163     if (!IS_NOEVENT(event)) {
 164         debug("\n---- action_exec: start -----\n");
 165         debug("EVENT: "); debug_event(event); debug("\n");
 166     }
 167
 168     keyrecord_t record = { .event = event };
 169
 170     // pre-process on tapping
 171     if (process_tapping(&record)) {
 172         if (!IS_NOEVENT(record.event)) {
 173             debug("processed: "); debug_record(record); debug("\n");
 174         }
 175     } else {
 176         // enqueue
 177         if (!waiting_buffer_enq(record)) {
 178             // clear all in case of overflow.
 179             debug("OVERFLOW: CLEAR ALL STATES\n");
 180             clear_keyboard();
 181             waiting_buffer_clear();
 182             tapping_key = (keyrecord_t){};
 183         }
 184     }
 185
 186     // process waiting_buffer
 187     if (!IS_NOEVENT(event) && waiting_buffer_head != waiting_buffer_tail) {
 188         debug("---- action_exec: process waiting_buffer -----\n");
 189     }
 190
 191     for (; waiting_buffer_tail != waiting_buffer_head; waiting_buffer_tail = (waiting_buffer_tail + 1) % WAITING_BUFFER_SIZE) {
 192         if (process_tapping(&waiting_buffer[waiting_buffer_tail])) {
 193             debug("processed: waiting_buffer["); debug_dec(waiting_buffer_tail); debug("] = ");
 194             debug_record(waiting_buffer[waiting_buffer_tail]); debug("\n\n");
 195         } else {
 196             break;
 197         }
 198     }
 199     if (!IS_NOEVENT(event)) {
 200         debug("\n");
 201     }
 202 }
 203
 204 static void process_action(keyrecord_t *record)
 205 {
 206     keyevent_t event = record->event;
 207     uint8_t tap_count = record->tap_count;
 208
 209     if (IS_NOEVENT(event)) { return; }
 210
 211     action_t action = keymap_get_action(current_layer, event.key.pos.row, event.key.pos.col);
 212     //debug("action: "); debug_hex16(action.code); if (event.pressed) debug("d\n"); else debug("u\n");
 213     debug("ACTION: "); debug_action(action); debug("\n");
 214
 215     switch (action.kind.id) {
 216         /* Key and Mods */
 217         case ACT_LMODS:
 218         case ACT_RMODS:
 219             {
 220                 uint8_t mods = (action.kind.id == ACT_LMODS) ?  action.key.mods :
 221                                                                 action.key.mods<<4;
 222                 if (event.pressed) {
 223                     uint8_t tmp_mods = host_get_mods();
 224                     if (mods) {
 225                         host_add_mods(mods);
 226                         host_send_keyboard_report();
 227                     }
 228                     register_code(action.key.code);
 229                     if (mods && action.key.code) {
 230                         host_set_mods(tmp_mods);
 231                         host_send_keyboard_report();
 232                     }
 233                 } else {
 234                     if (mods && !action.key.code) {
 235                         host_del_mods(mods);
 236                         host_send_keyboard_report();
 237                     }
 238                     unregister_code(action.key.code);
 239                 }
 240             }
 241             break;
 242         case ACT_LMODS_TAP:
 243         case ACT_RMODS_TAP:
 244             {
 245                 uint8_t mods = (action.kind.id == ACT_LMODS_TAP) ?  action.key.mods :
 246                                                                     action.key.mods<<4;
 247                 switch (action.layer.code) {
 248                     case 0x00:
 249                         // Oneshot modifier
 250                         if (event.pressed) {
 251                             if (tap_count == 0) {
 252                                 debug("MODS_TAP: Oneshot: add_mods\n");
 253                                 add_mods(mods);
 254                             }
 255                             else if (tap_count == 1) {
 256                                 debug("MODS_TAP: Oneshot: start\n");
 257                                 oneshot_start(mods, event.time);
 258                             }
 259                             else if (tap_count == TAPPING_TOGGLE) {
 260                                 debug("MODS_TAP: Oneshot: toggle\n");
 261                                 oneshot_toggle();
 262                             }
 263                             else {
 264                                 debug("MODS_TAP: Oneshot: cancel&add_mods\n");
 265                                 // double tap cancels oneshot and works as normal modifier.
 266                                 oneshot_cancel();
 267                                 add_mods(mods);
 268                             }
 269                         } else {
 270                             if (tap_count == 0) {
 271                                 debug("MODS_TAP: Oneshot: cancel/del_mods\n");
 272                                 // cancel oneshot by holding.
 273                                 oneshot_cancel();
 274                                 del_mods(mods);
 275                             }
 276                             else if (tap_count == 1) {
 277                                 debug("MODS_TAP: Oneshot: del_mods\n");
 278                                 // retain Oneshot
 279                                 del_mods(mods);
 280                             }
 281                             else {
 282                                 debug("MODS_TAP: Oneshot: del_mods\n");
 283                                 // cancel Mods
 284                                 del_mods(mods);
 285                             }
 286                         }
 287                         break;
 288                     default:
 289                         if (event.pressed) {
 290                             if (tap_count > 0) {
 291                                 if (waiting_buffer_has_anykey_pressed()) {
 292                                     debug("MODS_TAP: Tap: Cancel: add_mods\n");
 293                                     // ad hoc: set 0 to cancel tap
 294                                     record->tap_count = 0;
 295                                     add_mods(mods);
 296                                 } else {
 297                                     debug("MODS_TAP: Tap: register_code\n");
 298                                     register_code(action.key.code);
 299                                 }
 300                             } else {
 301                                 debug("MODS_TAP: No tap: add_mods\n");
 302                                 add_mods(mods);
 303                             }
 304                         } else {
 305                             if (tap_count > 0) {
 306                                 debug("MODS_TAP: Tap: unregister_code\n");
 307                                 unregister_code(action.key.code);
 308                             } else {
 309                                 debug("MODS_TAP: No tap: add_mods\n");
 310                                 del_mods(mods);
 311                             }
 312                         }
 313                         break;
 314                 }
 315             }
 316             break;
 317
 318         /* other HID usage */
 319         case ACT_USAGE:
 320 #ifdef EXTRAKEY_ENABLE
 321             switch (action.usage.page) {
 322                 case PAGE_SYSTEM:
 323                     if (event.pressed) {
 324                         host_system_send(action.usage.code);
 325                     } else {
 326                         host_system_send(0);
 327                     }
 328                     break;
 329                 case PAGE_CONSUMER:
 330                     if (event.pressed) {
 331                         host_consumer_send(action.usage.code);
 332                     } else {
 333                         host_consumer_send(0);
 334                     }
 335                     break;
 336             }
 337 #endif
 338             break;
 339
 340         /* Mouse key */
 341         case ACT_MOUSEKEY:
 342 #ifdef MOUSEKEY_ENABLE
 343             if (event.pressed) {
 344                 mousekey_on(action.key.code);
 345                 mousekey_send();
 346             } else {
 347                 mousekey_off(action.key.code);
 348                 mousekey_send();
 349             }
 350 #endif
 351             break;
 352
 353         /* Layer key */
 354         case ACT_LAYER:
 355             switch (action.layer.code) {
 356                 case LAYER_MOMENTARY:  /* momentary */
 357                     if (event.pressed) {
 358                         layer_switch(action.layer.val);
 359                     }
 360                     else {
 361                         layer_switch(default_layer);
 362                     }
 363                     break;
 364                 case LAYER_ON_PRESS:
 365                     if (event.pressed) {
 366                         layer_switch(action.layer.val);
 367                     }
 368                     break;
 369                 case LAYER_ON_RELEASE:
 370                     if (!event.pressed) {
 371                         layer_switch(action.layer.val);
 372                     }
 373                     break;
 374                 case LAYER_DEFAULT:  /* default layer */
 375                     switch (action.layer.val) {
 376                         case DEFAULT_ON_BOTH:
 377                             layer_switch(default_layer);
 378                             break;
 379                         case DEFAULT_ON_PRESS:
 380                             if (event.pressed) {
 381                                 layer_switch(default_layer);
 382                             }
 383                             break;
 384                         case DEFAULT_ON_RELEASE:
 385                             if (!event.pressed) {
 386                                 layer_switch(default_layer);
 387                             }
 388                             break;
 389                     }
 390                     break;
 391                 case LAYER_TAP_TOGGLE:  /* switch on hold and toggle on several taps */
 392                     if (event.pressed) {
 393                         if (tap_count < TAPPING_TOGGLE) {
 394                             layer_switch(action.layer.val);
 395                         }
 396                     } else {
 397                         if (tap_count >= TAPPING_TOGGLE) {
 398                             debug("LAYER_PRESSED: tap toggle.\n");
 399                             layer_switch(action.layer.val);
 400                         }
 401                     }
 402                     break;
 403                 case LAYER_CHANGE_DEFAULT:  /* change default layer */
 404                     if (event.pressed) {
 405                         default_layer = action.layer.val;
 406                         layer_switch(default_layer);
 407                     }
 408                     break;
 409                 default:    /* switch layer on hold and key on tap*/
 410                     if (event.pressed) {
 411                        if (tap_count > 0) {
 412                             debug("LAYER_PRESSED: Tap: register_code\n");
 413                             register_code(action.layer.code);
 414                        } else {
 415                             debug("LAYER_PRESSED: No tap: layer_switch\n");
 416                             layer_switch(action.layer.val);
 417                        }
 418                     } else {
 419                         if (tap_count > 0) {
 420                             debug("LAYER_PRESSED: Tap: unregister_code\n");
 421                             unregister_code(action.layer.code);
 422                         } else {
 423                             //debug("LAYER_PRESSED: No tap: NO ACTION\n");
 424 //TODO: this is ok?
 425                             debug("LAYER_PRESSED: No tap: return to default layer\n");
 426                             layer_switch(default_layer);
 427                         }
 428                     }
 429                     break;
 430             }
 431             break;
 432         case ACT_LAYER_BIT:
 433             switch (action.layer.code) {
 434                 case LAYER_MOMENTARY:  /* momentary */
 435                     if (event.pressed) {
 436                         layer_switch(current_layer ^ action.layer.val);
 437                     } else {
 438                         layer_switch(current_layer ^ action.layer.val);
 439                     }
 440                     break;
 441                 case LAYER_ON_PRESS:
 442                     if (event.pressed) {
 443                         layer_switch(current_layer ^ action.layer.val);
 444                     }
 445                     break;
 446                 case LAYER_ON_RELEASE:
 447                     if (!event.pressed) {
 448                         layer_switch(current_layer ^ action.layer.val);
 449                     }
 450                     break;
 451                 case LAYER_TAP_TOGGLE:  /* switch on hold and toggle on several taps */
 452                     if (event.pressed) {
 453                         if (tap_count < TAPPING_TOGGLE) {
 454                             debug("LAYER_BIT: tap toggle(press).\n");
 455                             layer_switch(current_layer ^ action.layer.val);
 456                         }
 457                     } else {
 458                         if (tap_count <= TAPPING_TOGGLE) {
 459                             debug("LAYER_BIT: tap toggle(release).\n");
 460                             layer_switch(current_layer ^ action.layer.val);
 461                         }
 462                     }
 463                     break;
 464                 case 0xFF:
 465                     // change default layer
 466                     if (event.pressed) {
 467                         default_layer = current_layer ^ action.layer.val;
 468                         layer_switch(default_layer);
 469                     } else {
 470                         default_layer = current_layer ^ action.layer.val;
 471                         layer_switch(default_layer);
 472                     }
 473                     break;
 474                 default:
 475                     // with tap key
 476                     if (event.pressed) {
 477                         if (IS_TAPPING_KEY(event.key) && tap_count > 0) {
 478                             debug("LAYER_BIT: Tap: register_code\n");
 479                             register_code(action.layer.code);
 480                         } else {
 481                             debug("LAYER_BIT: No tap: layer_switch(bit on)\n");
 482                             layer_switch(current_layer ^ action.layer.val);
 483                         }
 484                     } else {
 485                         if (IS_TAPPING_KEY(event.key) && tap_count > 0) {
 486                             debug("LAYER_BIT: Tap: unregister_code\n");
 487                             unregister_code(action.layer.code);
 488                         } else {
 489                             debug("LAYER_BIT: No tap: layer_switch(bit off)\n");
 490                             layer_switch(current_layer ^ action.layer.val);
 491                         }
 492                     }
 493                     break;
 494             }
 495             break;
 496
 497         /* Extentions */
 498         case ACT_MACRO:
 499             break;
 500         case ACT_COMMAND:
 501             break;
 502         case ACT_FUNCTION:
 503             // TODO
 504             keymap_call_function(record, action.func.id, action.func.opt);
 505             break;
 506         default:
 507             break;
 508     }
 509 }
 510
 511 /* Tapping
 512  *
 513  * Rule: Tap key is typed(pressed and released) within TAPPING_TERM.
 514  *       (without interfering by typing other key)
 515  */
 516 /* return true when key event is processed or consumed. */
 517 static bool process_tapping(keyrecord_t *keyp)
 518 {
 519     keyevent_t event = keyp->event;
 520
 521     // if tapping
 522     if (IS_TAPPING_PRESSED()) {
 523         if (WITHIN_TAPPING_TERM(event)) {
 524             if (tapping_key.tap_count == 0) {
 525                 if (IS_TAPPING_KEY(event.key) && !event.pressed) {
 526                     // first tap!
 527                     debug("Tapping: First tap(0->1).\n");
 528                     tapping_key.tap_count = 1;
 529                     debug_tapping_key();
 530                     process_action(&tapping_key);
 531
 532                     // enqueue
 533                     keyp->tap_count = tapping_key.tap_count;
 534                     return false;
 535                 }
 536 #if TAPPING_TERM >= 500
 537                 /* This can prevent from typing some tap keys in a row at a time. */
 538                 else if (!event.pressed && waiting_buffer_typed(event)) {
 539                     // other key typed. not tap.
 540                     debug("Tapping: End. No tap. Interfered by typing key\n");
 541                     process_action(&tapping_key);
 542                     tapping_key = (keyrecord_t){};
 543                     debug_tapping_key();
 544
 545                     // enqueue
 546                     return false;
 547                 }
 548 #endif
 549                 else {
 550                     // other key events shall be enq'd till tapping state settles.
 551                     return false;
 552                 }
 553             }
 554             // tap_count > 0
 555             else {
 556                 if (IS_TAPPING_KEY(event.key) && !event.pressed) {
 557                     debug("Tapping: Tap release("); debug_dec(tapping_key.tap_count); debug(")\n");
 558                     keyp->tap_count = tapping_key.tap_count;
 559                     process_action(keyp);
 560                     tapping_key = *keyp;
 561                     debug_tapping_key();
 562                     return true;
 563                 }
 564                 else if (is_tap_key(keyp->event.key) && event.pressed) {
 565                     if (tapping_key.tap_count > 1) {
 566                         debug("Tapping: Start new tap with releasing last tap(>1).\n");
 567                         // unregister key
 568                         process_action(&(keyrecord_t){
 569                                 .tap_count = tapping_key.tap_count,
 570                                 .event.key = tapping_key.event.key,
 571                                 .event.time = event.time,
 572                                 .event.pressed = false
 573                         });
 574                     } else {
 575                         debug("Tapping: Start while last tap(1).\n");
 576                     }
 577                     tapping_key = *keyp;
 578                     waiting_buffer_scan_tap();
 579                     debug_tapping_key();
 580                     return true;
 581                 }
 582                 else {
 583                     if (!IS_NOEVENT(keyp->event)) {
 584                         debug("Tapping: key event while last tap(>0).\n");
 585                     }
 586                     process_action(keyp);
 587                     return true;
 588                 }
 589             }
 590         }
 591         // after TAPPING_TERM
 592         else {
 593             if (tapping_key.tap_count == 0) {
 594                 debug("Tapping: End. Timeout. Not tap(0): ");
 595                 debug_event(event); debug("\n");
 596                 process_action(&tapping_key);
 597                 tapping_key = (keyrecord_t){};
 598                 debug_tapping_key();
 599                 return false;
 600             }  else {
 601                 if (IS_TAPPING_KEY(event.key) && !event.pressed) {
 602                     debug("Tapping: End. last timeout tap release(>0).");
 603                     keyp->tap_count = tapping_key.tap_count;
 604                     process_action(keyp);
 605                     tapping_key = (keyrecord_t){};
 606                     return true;
 607                 }
 608                 else if (is_tap_key(keyp->event.key) && event.pressed) {
 609                     if (tapping_key.tap_count > 1) {
 610                         debug("Tapping: Start new tap with releasing last timeout tap(>1).\n");
 611                         // unregister key
 612                         process_action(&(keyrecord_t){
 613                                 .tap_count = tapping_key.tap_count,
 614                                 .event.key = tapping_key.event.key,
 615                                 .event.time = event.time,
 616                                 .event.pressed = false
 617                         });
 618                     } else {
 619                         debug("Tapping: Start while last timeout tap(1).\n");
 620                     }
 621                     tapping_key = *keyp;
 622                     waiting_buffer_scan_tap();
 623                     debug_tapping_key();
 624                     return true;
 625                 }
 626                 else {
 627                     if (!IS_NOEVENT(keyp->event)) {
 628                         debug("Tapping: key event while last timeout tap(>0).\n");
 629                     }
 630                     process_action(keyp);
 631                     return true;
 632                 }
 633             }
 634         }
 635     } else if (IS_TAPPING_RELEASED()) {
 636         if (WITHIN_TAPPING_TERM(event)) {
 637             if (tapping_key.tap_count > 0 && IS_TAPPING_KEY(event.key) && event.pressed) {
 638                 // sequential tap.
 639                 keyp->tap_count = tapping_key.tap_count + 1;
 640                 debug("Tapping: Tap press("); debug_dec(keyp->tap_count); debug(")\n");
 641                 process_action(keyp);
 642                 tapping_key = *keyp;
 643                 debug_tapping_key();
 644                 return true;
 645             } else if (event.pressed && is_tap_key(event.key)) {
 646                 // Sequential tap can be interfered with other tap key.
 647                 debug("Tapping: Start with interfering other tap.\n");
 648                 tapping_key = *keyp;
 649                 waiting_buffer_scan_tap();
 650                 debug_tapping_key();
 651                 return true;
 652             } else {
 653                 if (!IS_NOEVENT(keyp->event)) debug("Tapping: other key just after tap.\n");
 654                 process_action(keyp);
 655                 return true;
 656             }
 657         } else {
 658             // timeout. no sequential tap.
 659             debug("Tapping: End(Timeout after releasing last tap): ");
 660             debug_event(event); debug("\n");
 661             tapping_key = (keyrecord_t){};
 662             debug_tapping_key();
 663             return false;
 664         }
 665     }
 666     // not tapping satate
 667     else {
 668         if (event.pressed && is_tap_key(event.key)) {
 669             debug("Tapping: Start(Press tap key).\n");
 670             tapping_key = *keyp;
 671             waiting_buffer_scan_tap();
 672             debug_tapping_key();
 673             return true;
 674         } else {
 675             process_action(keyp);
 676             return true;
 677         }
 678     }
 679 }
 680
 681 /* scan buffer for tapping */
 682 static void waiting_buffer_scan_tap(void)
 683 {
 684     // tapping already is settled
 685     if (tapping_key.tap_count > 0) return;
 686     // invalid state: tapping_key released && tap_count == 0
 687     if (!tapping_key.event.pressed) return;
 688
 689     for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
 690         if (IS_TAPPING_KEY(waiting_buffer[i].event.key) &&
 691                 !waiting_buffer[i].event.pressed &&
 692                 WITHIN_TAPPING_TERM(waiting_buffer[i].event)) {
 693             tapping_key.tap_count = 1;
 694             waiting_buffer[i].tap_count = 1;
 695             process_action(&tapping_key);
 696
 697             debug("waiting_buffer_scan_tap: found at ["); debug_dec(i); debug("]\n");
 698             debug_waiting_buffer();
 699             return;
 700         }
 701     }
 702 }
 703
 704
 705
 706 /*
 707  * Utilities for actions.
 708  */
 709 void register_code(uint8_t code)
 710 {
 711     if (code == KC_NO) {
 712         return;
 713     }
 714     else if IS_KEY(code) {
 715         // TODO: should push command_proc out of this block?
 716         if (command_proc(code)) return;
 717
 718         if (oneshot_state.mods && oneshot_state.ready && !oneshot_state.disabled) {
 719             uint8_t tmp_mods = host_get_mods();
 720             host_add_mods(oneshot_state.mods);
 721             host_add_key(code);
 722             host_send_keyboard_report();
 723
 724             host_set_mods(tmp_mods);
 725             oneshot_state.ready = false;
 726         } else {
 727             host_add_key(code);
 728             host_send_keyboard_report();
 729         }
 730     }
 731     else if IS_MOD(code) {
 732         host_add_mods(MOD_BIT(code));
 733         host_send_keyboard_report();
 734     }
 735 }
 736
 737 void unregister_code(uint8_t code)
 738 {
 739     if IS_KEY(code) {
 740         host_del_key(code);
 741         host_send_keyboard_report();
 742     }
 743     else if IS_MOD(code) {
 744         host_del_mods(MOD_BIT(code));
 745         host_send_keyboard_report();
 746     }
 747 }
 748
 749 void add_mods(uint8_t mods)
 750 {
 751     if (mods) {
 752         host_add_mods(mods);
 753         host_send_keyboard_report();
 754     }
 755 }
 756
 757 void del_mods(uint8_t mods)
 758 {
 759     if (mods) {
 760         host_del_mods(mods);
 761         host_send_keyboard_report();
 762     }
 763 }
 764
 765 void set_mods(uint8_t mods)
 766 {
 767     host_set_mods(mods);
 768     host_send_keyboard_report();
 769 }
 770
 771 void clear_keyboard(void)
 772 {
 773     host_clear_mods();
 774     clear_keyboard_but_mods();
 775 }
 776
 777 void clear_keyboard_but_mods(void)
 778 {
 779     host_clear_keys();
 780     host_send_keyboard_report();
 781 #ifdef MOUSEKEY_ENABLE
 782     mousekey_clear();
 783     mousekey_send();
 784 #endif
 785 #ifdef EXTRAKEY_ENABLE
 786     host_system_send(0);
 787     host_consumer_send(0);
 788 #endif
 789 }
 790
 791 bool sending_anykey(void)
 792 {
 793     return (host_has_anykey() || host_mouse_in_use() ||
 794             host_last_sysytem_report() || host_last_consumer_report());
 795 }
 796
 797 void layer_switch(uint8_t new_layer)
 798 {
 799     if (current_layer != new_layer) {
 800         debug("Layer Switch: "); debug_hex(current_layer);
 801         debug(" -> "); debug_hex(new_layer); debug("\n");
 802
 803         current_layer = new_layer;
 804         clear_keyboard_but_mods(); // To avoid stuck keys
 805         // NOTE: update mods with full scan of matrix? if modifier changes between layers
 806     }
 807 }
 808
 809 bool is_tap_key(key_t key)
 810 {
 811     action_t action = keymap_get_action(current_layer, key.pos.row, key.pos.col);
 812     switch (action.kind.id) {
 813         case ACT_LMODS_TAP:
 814         case ACT_RMODS_TAP:
 815             return true;
 816         case ACT_LAYER:
 817         case ACT_LAYER_BIT:
 818             switch (action.layer.code) {
 819                 case LAYER_MOMENTARY:
 820                 case LAYER_ON_PRESS:
 821                 case LAYER_ON_RELEASE:
 822                 case LAYER_DEFAULT:
 823                     return false;
 824                 case LAYER_TAP_TOGGLE:
 825                 default:    /* tap key */
 826                     return true;
 827             }
 828             return false;
 829         case ACT_FUNCTION:
 830             if (action.func.opt & FUNC_TAP) { return true; }
 831             return false;
 832     }
 833     return false;
 834 }
 835
 836
 837 /*
 838  * debug print
 839  */
 840 static void debug_event(keyevent_t event)
 841 {
 842     debug_hex16(event.key.raw);
 843     if (event.pressed) debug("d("); else debug("u(");
 844     debug_dec(event.time); debug(")");
 845 }
 846 static void debug_record(keyrecord_t record)
 847 {
 848     debug_event(record.event); debug(":"); debug_dec(record.tap_count);
 849 }
 850 static void debug_action(action_t action)
 851 {
 852     switch (action.kind.id) {
 853         case ACT_LMODS:             debug("ACT_LMODS");             break;
 854         case ACT_RMODS:             debug("ACT_RMODS");             break;
 855         case ACT_LMODS_TAP:         debug("ACT_LMODS_TAP");         break;
 856         case ACT_RMODS_TAP:         debug("ACT_RMODS_TAP");         break;
 857         case ACT_USAGE:             debug("ACT_USAGE");             break;
 858         case ACT_MOUSEKEY:          debug("ACT_MOUSEKEY");          break;
 859         case ACT_LAYER:             debug("ACT_LAYER");     break;
 860         case ACT_LAYER_BIT:         debug("ACT_LAYER_BIT");         break;
 861         case ACT_MACRO:             debug("ACT_MACRO");             break;
 862         case ACT_COMMAND:           debug("ACT_COMMAND");           break;
 863         case ACT_FUNCTION:          debug("ACT_FUNCTION");          break;
 864         default:                    debug("UNKNOWN");               break;
 865     }
 866     debug("[");
 867     debug_hex4(action.kind.param>>8);
 868     debug(":");
 869     debug_hex8(action.kind.param & 0xff);
 870     debug("]");
 871 }
 872 static void debug_tapping_key(void)
 873 {
 874     debug("TAPPING_KEY="); debug_record(tapping_key); debug("\n");
 875 }
 876 static void debug_waiting_buffer(void)
 877 {
 878     debug("{ ");
 879     for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
 880         debug("["); debug_dec(i); debug("]="); debug_record(waiting_buffer[i]); debug(" ");
 881     }
 882     debug("}\n");
 883 }