restore.c

   1 /* Copyright (c) 2012, Bastien Dejean
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * 1. Redistributions of source code must retain the above copyright notice, this
   8  *    list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright notice,
  10  *    this list of conditions and the following disclaimer in the documentation
  11  *    and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
  17  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  20  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29 #include "bspwm.h"
  30 #include "desktop.h"
  31 #include "ewmh.h"
  32 #include "history.h"
  33 #include "monitor.h"
  34 #include "query.h"
  35 #include "stack.h"
  36 #include "tree.h"
  37 #include "settings.h"
  38 #include "restore.h"
  39 #include "window.h"
  40 #include "parse.h"
  41
  42 bool restore_tree(const char *file_path)
  43 {
  44         size_t jslen;
  45         char *json = read_string(file_path, &jslen);
  46
  47         if (json == NULL) {
  48                 return false;
  49         }
  50
  51         int nbtok = 256;
  52         jsmn_parser parser;
  53         jsmntok_t *tokens = malloc(nbtok * sizeof(jsmntok_t));
  54
  55         if (tokens == NULL) {
  56                 perror("Restore tree: malloc");
  57                 free(json);
  58                 return false;
  59         }
  60
  61         jsmn_init(&parser);
  62         int ret;
  63
  64         while ((ret = jsmn_parse(&parser, json, jslen, tokens, nbtok)) == JSMN_ERROR_NOMEM) {
  65                 nbtok *= 2;
  66                 jsmntok_t *rtokens = realloc(tokens, nbtok * sizeof(jsmntok_t));
  67                 if (rtokens == NULL) {
  68                         perror("Restore tree: realloc");
  69                         free(tokens);
  70                         free(json);
  71                         return false;
  72                 } else {
  73                         tokens = rtokens;
  74                 }
  75         }
  76
  77         if (ret < 0) {
  78                 warn("Restore tree: jsmn_parse: ");
  79                 switch (ret) {
  80                         case JSMN_ERROR_NOMEM:
  81                                 warn("not enough memory.\n");
  82                                 break;
  83                         case JSMN_ERROR_INVAL:
  84                                 warn("found invalid character inside JSON string.\n");
  85                                 break;
  86                         case JSMN_ERROR_PART:
  87                                 warn("not a full JSON packet.\n");
  88                                 break;
  89                         default:
  90                                 warn("unknown error.\n");
  91                                 break;
  92                 }
  93
  94                 free(tokens);
  95                 free(json);
  96
  97                 return false;
  98         }
  99
 100         int num = tokens[0].size;
 101
 102         if (num < 1) {
 103                 free(tokens);
 104                 free(json);
 105
 106                 return false;
 107         }
 108
 109         mon = NULL;
 110         while (mon_head != NULL) {
 111                 remove_monitor(mon_head);
 112         }
 113
 114         jsmntok_t *t = tokens + 1;
 115         char *focusedMonitorName = NULL, *primaryMonitorName = NULL;
 116
 117         for (int i = 0; i < num; i++) {
 118                 if (keyeq("focusedMonitorName", t, json)) {
 119                         free(focusedMonitorName);
 120                         t++;
 121                         focusedMonitorName = copy_string(json + t->start, t->end - t->start);
 122                 } else if (keyeq("primaryMonitorName", t, json)) {
 123                         free(primaryMonitorName);
 124                         t++;
 125                         primaryMonitorName = copy_string(json + t->start, t->end - t->start);
 126                 } else if (keyeq("clientsCount", t, json)) {
 127                         t++;
 128                         sscanf(json + t->start, "%u", &clients_count);
 129                 } else if (keyeq("monitors", t, json)) {
 130                         t++;
 131                         int s = t->size;
 132                         t++;
 133                         for (int j = 0; j < s; j++) {
 134                                 monitor_t *m = restore_monitor(&t, json);
 135                                 if (m->desk == NULL) {
 136                                         add_desktop(m, make_desktop(NULL, XCB_NONE));
 137                                 }
 138                                 add_monitor(m);
 139                         }
 140                         continue;
 141                 } else if (keyeq("focusHistory", t, json)) {
 142                         t++;
 143                         restore_history(&t, json);
 144                         continue;
 145                 } else if (keyeq("stackingList", t, json)) {
 146                         t++;
 147                         restore_stack(&t, json);
 148                         continue;
 149                 }
 150                 t++;
 151         }
 152
 153         if (focusedMonitorName != NULL) {
 154                 coordinates_t loc;
 155                 if (locate_monitor(focusedMonitorName, &loc)) {
 156                         mon = loc.monitor;
 157                 }
 158         }
 159
 160         if (primaryMonitorName != NULL) {
 161                 coordinates_t loc;
 162                 if (locate_monitor(primaryMonitorName, &loc)) {
 163                         pri_mon = loc.monitor;
 164                 }
 165         }
 166
 167         free(focusedMonitorName);
 168         free(primaryMonitorName);
 169
 170         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
 171                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
 172                         refresh_presel_feebacks_in(d->root, d, m);
 173                         restack_presel_feedback(d);
 174                         for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
 175                                 uint32_t values[] = {CLIENT_EVENT_MASK | (focus_follows_pointer ? XCB_EVENT_MASK_ENTER_WINDOW : 0)};
 176                                 xcb_change_window_attributes(dpy, n->id, XCB_CW_EVENT_MASK, values);
 177                         }
 178                 }
 179         }
 180
 181         ewmh_update_client_list(false);
 182         ewmh_update_client_list(true);
 183         ewmh_update_active_window();
 184         ewmh_update_number_of_desktops();
 185         ewmh_update_current_desktop();
 186         ewmh_update_desktop_names();
 187
 188         free(tokens);
 189         free(json);
 190
 191         return true;
 192 }
 193
 194 #define RESTORE_INT(k, p) \
 195         } else if (keyeq(#k, *t, json)) { \
 196                 (*t)++; \
 197                 sscanf(json + (*t)->start, "%i", p);
 198
 199 #define RESTORE_UINT(k, p) \
 200         } else if (keyeq(#k, *t, json)) { \
 201                 (*t)++; \
 202                 sscanf(json + (*t)->start, "%u", p);
 203
 204 #define RESTORE_USINT(k, p) \
 205         } else if (keyeq(#k, *t, json)) { \
 206                 (*t)++; \
 207                 sscanf(json + (*t)->start, "%hu", p);
 208
 209 #define RESTORE_DOUBLE(k, p) \
 210         } else if (keyeq(#k, *t, json)) { \
 211                 (*t)++; \
 212                 sscanf(json + (*t)->start, "%lf", p);
 213
 214 #define RESTORE_ANY(k, p, f) \
 215         } else if (keyeq(#k, *t, json)) { \
 216                 (*t)++; \
 217                 char *val = copy_string(json + (*t)->start, (*t)->end - (*t)->start); \
 218                 f(val, p); \
 219                 free(val);
 220
 221 #define RESTORE_BOOL(k, p)  RESTORE_ANY(k, p, parse_bool)
 222
 223 monitor_t *restore_monitor(jsmntok_t **t, char *json)
 224 {
 225         int num = (*t)->size;
 226         (*t)++;
 227         monitor_t *m = make_monitor(NULL, UINT32_MAX);
 228         char *focusedDesktopName = NULL;
 229
 230         for (int i = 0; i < num; i++) {
 231                 if (keyeq("name", *t, json)) {
 232                         (*t)++;
 233                         snprintf(m->name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
 234                 RESTORE_UINT(id, &m->id)
 235                 RESTORE_UINT(randrId, &m->randr_id)
 236                 RESTORE_BOOL(wired, &m->wired)
 237                 RESTORE_UINT(stickyCount, &m->sticky_count)
 238                 RESTORE_INT(windowGap, &m->window_gap)
 239                 RESTORE_UINT(borderWidth, &m->border_width)
 240                 } else if (keyeq("padding", *t, json)) {
 241                         (*t)++;
 242                         restore_padding(&m->padding, t, json);
 243                         continue;
 244                 } else if (keyeq("rectangle", *t, json)) {
 245                         (*t)++;
 246                         restore_rectangle(&m->rectangle, t, json);
 247                         update_root(m, &m->rectangle);
 248                         continue;
 249                 } else if (keyeq("focusedDesktopName", *t, json)) {
 250                         free(focusedDesktopName);
 251                         (*t)++;
 252                         focusedDesktopName = copy_string(json + (*t)->start, (*t)->end - (*t)->start);
 253                 } else if (keyeq("desktops", *t, json)) {
 254                         (*t)++;
 255                         int s = (*t)->size;
 256                         (*t)++;
 257                         for (int j = 0; j < s; j++) {
 258                                 desktop_t *d = restore_desktop(t, json);
 259                                 add_desktop(m, d);
 260                         }
 261                         continue;
 262                 } else {
 263                         warn("Restore monitor: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
 264                         (*t)++;
 265                 }
 266                 (*t)++;
 267         }
 268
 269         if (focusedDesktopName != NULL) {
 270                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
 271                         if (streq(focusedDesktopName, d->name)) {
 272                                 m->desk = d;
 273                                 break;
 274                         }
 275                 }
 276         }
 277
 278         free(focusedDesktopName);
 279
 280         return m;
 281 }
 282
 283 desktop_t *restore_desktop(jsmntok_t **t, char *json)
 284 {
 285         int s = (*t)->size;
 286         (*t)++;
 287         desktop_t *d = make_desktop(NULL, UINT32_MAX);
 288         xcb_window_t focusedNodeId = XCB_NONE;
 289
 290         for (int i = 0; i < s; i++) {
 291                 if (keyeq("name", *t, json)) {
 292                         (*t)++;
 293                         snprintf(d->name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
 294                 RESTORE_UINT(id, &d->id)
 295                 RESTORE_ANY(layout, &d->layout, parse_layout)
 296                 RESTORE_INT(windowGap, &d->window_gap)
 297                 RESTORE_UINT(borderWidth, &d->border_width)
 298                 } else if (keyeq("focusedNodeId", *t, json)) {
 299                         (*t)++;
 300                         sscanf(json + (*t)->start, "%u", &focusedNodeId);
 301                 } else if (keyeq("padding", *t, json)) {
 302                         (*t)++;
 303                         restore_padding(&d->padding, t, json);
 304                         continue;
 305                 } else if (keyeq("root", *t, json)) {
 306                         (*t)++;
 307                         d->root = restore_node(t, json);
 308                         continue;
 309                 } else {
 310                         warn("Restore desktop: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
 311                         (*t)++;
 312                 }
 313                 (*t)++;
 314         }
 315
 316         if (focusedNodeId != XCB_NONE) {
 317                 d->focus = find_by_id_in(d->root, focusedNodeId);
 318         }
 319
 320         return d;
 321 }
 322
 323 node_t *restore_node(jsmntok_t **t, char *json)
 324 {
 325         if ((*t)->type == JSMN_PRIMITIVE) {
 326                 (*t)++;
 327                 return NULL;
 328         } else {
 329                 int s = (*t)->size;
 330                 (*t)++;
 331                 /* hack to prevent a new ID from being generated */
 332                 node_t *n = make_node(UINT32_MAX);
 333
 334                 for (int i = 0; i < s; i++) {
 335                         if (keyeq("id", *t, json)) {
 336                                 (*t)++;
 337                                 sscanf(json + (*t)->start, "%u", &n->id);
 338                         RESTORE_ANY(splitType, &n->split_type, parse_split_type)
 339                         RESTORE_DOUBLE(splitRatio, &n->split_ratio)
 340                         RESTORE_INT(birthRotation, &n->birth_rotation)
 341                         RESTORE_BOOL(vacant, &n->vacant)
 342                         RESTORE_BOOL(sticky, &n->sticky)
 343                         RESTORE_BOOL(private, &n->private)
 344                         RESTORE_BOOL(locked, &n->locked)
 345                         } else if (keyeq("presel", *t, json)) {
 346                                 (*t)++;
 347                                 n->presel = restore_presel(t, json);
 348                                 continue;
 349                         } else if (keyeq("rectangle", *t, json)) {
 350                                 (*t)++;
 351                                 restore_rectangle(&n->rectangle, t, json);
 352                                 continue;
 353                         } else if (keyeq("firstChild", *t, json)) {
 354                                 (*t)++;
 355                                 node_t *fc = restore_node(t, json);
 356                                 n->first_child = fc;
 357                                 if (fc != NULL) {
 358                                         fc->parent = n;
 359                                 }
 360                                 continue;
 361                         } else if (keyeq("secondChild", *t, json)) {
 362                                 (*t)++;
 363                                 node_t *sc = restore_node(t, json);
 364                                 n->second_child = sc;
 365                                 if (sc != NULL) {
 366                                         sc->parent = n;
 367                                 }
 368                                 continue;
 369                         } else if (keyeq("client", *t, json)) {
 370                                 (*t)++;
 371                                 n->client = restore_client(t, json);
 372                                 continue;
 373                         } else {
 374                                 warn("Restore node: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
 375                                 (*t)++;
 376                         }
 377                         (*t)++;
 378                 }
 379
 380                 return n;
 381         }
 382 }
 383
 384 presel_t *restore_presel(jsmntok_t **t, char *json)
 385 {
 386         if ((*t)->type == JSMN_PRIMITIVE) {
 387                 (*t)++;
 388                 return NULL;
 389         } else {
 390                 int s = (*t)->size;
 391                 (*t)++;
 392                 presel_t *p = make_presel();
 393
 394                 for (int i = 0; i < s; i++) {
 395                         if (keyeq("splitRatio", *t, json)) {
 396                                 (*t)++;
 397                                 sscanf(json + (*t)->start, "%lf", &p->split_ratio);
 398                         RESTORE_ANY(splitDir, &p->split_dir, parse_direction)
 399                         }
 400
 401                         (*t)++;
 402                 }
 403
 404                 return p;
 405         }
 406 }
 407
 408
 409 client_t *restore_client(jsmntok_t **t, char *json)
 410 {
 411         if ((*t)->type == JSMN_PRIMITIVE) {
 412                 (*t)++;
 413                 return NULL;
 414         } else {
 415                 int s = (*t)->size;
 416                 (*t)++;
 417                 client_t *c = make_client();
 418
 419                 for (int i = 0; i < s; i++) {
 420                         if (keyeq("className", *t, json)) {
 421                                 (*t)++;
 422                                 snprintf(c->class_name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
 423                         } else if (keyeq("instanceName", *t, json)) {
 424                                 (*t)++;
 425                                 snprintf(c->instance_name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
 426                         RESTORE_ANY(state, &c->state, parse_client_state)
 427                         RESTORE_ANY(lastState, &c->last_state, parse_client_state)
 428                         RESTORE_ANY(layer, &c->layer, parse_stack_layer)
 429                         RESTORE_ANY(lastLayer, &c->last_layer, parse_stack_layer)
 430                         RESTORE_UINT(borderWidth, &c->border_width)
 431                         RESTORE_BOOL(urgent, &c->urgent)
 432                         RESTORE_BOOL(visible, &c->visible)
 433                         RESTORE_BOOL(icccmFocus, &c->icccm_focus)
 434                         RESTORE_BOOL(icccmInput, &c->icccm_input)
 435                         RESTORE_USINT(minWidth, &c->min_width)
 436                         RESTORE_USINT(maxWidth, &c->max_width)
 437                         RESTORE_USINT(minHeight, &c->min_height)
 438                         RESTORE_USINT(maxHeight, &c->max_height)
 439                         RESTORE_INT(wmStatesCount, &c->wm_states_count)
 440                         } else if (keyeq("wmState", *t, json)) {
 441                                 (*t)++;
 442                                 restore_wm_state(c->wm_state, t, json);
 443                                 continue;
 444                         } else if (keyeq("tiledRectangle", *t, json)) {
 445                                 (*t)++;
 446                                 restore_rectangle(&c->tiled_rectangle, t, json);
 447                                 continue;
 448                         } else if (keyeq("floatingRectangle", *t, json)) {
 449                                 (*t)++;
 450                                 restore_rectangle(&c->floating_rectangle, t, json);
 451                                 continue;
 452                         } else {
 453                                 warn("Restore client: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
 454                                 (*t)++;
 455                         }
 456
 457                         (*t)++;
 458                 }
 459
 460                 return c;
 461         }
 462 }
 463
 464 void restore_rectangle(xcb_rectangle_t *r, jsmntok_t **t, char *json)
 465 {
 466         int s = (*t)->size;
 467         (*t)++;
 468
 469         for (int i = 0; i < s; i++) {
 470                 if (keyeq("x", *t, json)) {
 471                         (*t)++;
 472                         sscanf(json + (*t)->start, "%hi", &r->x);
 473                 } else if (keyeq("y", *t, json)) {
 474                         (*t)++;
 475                         sscanf(json + (*t)->start, "%hi", &r->y);
 476                 } else if (keyeq("width", *t, json)) {
 477                         (*t)++;
 478                         sscanf(json + (*t)->start, "%hu", &r->width);
 479                 } else if (keyeq("height", *t, json)) {
 480                         (*t)++;
 481                         sscanf(json + (*t)->start, "%hu", &r->height);
 482                 }
 483                 (*t)++;
 484         }
 485 }
 486
 487 void restore_padding(padding_t *p, jsmntok_t **t, char *json)
 488 {
 489         int s = (*t)->size;
 490         (*t)++;
 491
 492         for (int i = 0; i < s; i++) {
 493                 if (keyeq("top", *t, json)) {
 494                         (*t)++;
 495                         sscanf(json + (*t)->start, "%i", &p->top);
 496                 } else if (keyeq("right", *t, json)) {
 497                         (*t)++;
 498                         sscanf(json + (*t)->start, "%i", &p->right);
 499                 } else if (keyeq("bottom", *t, json)) {
 500                         (*t)++;
 501                         sscanf(json + (*t)->start, "%i", &p->bottom);
 502                 } else if (keyeq("left", *t, json)) {
 503                         (*t)++;
 504                         sscanf(json + (*t)->start, "%i", &p->left);
 505                 }
 506                 (*t)++;
 507         }
 508 }
 509
 510 void restore_history(jsmntok_t **t, char *json)
 511 {
 512         int s = (*t)->size;
 513         (*t)++;
 514
 515         for (int i = 0; i < s; i++) {
 516                 coordinates_t loc = {NULL, NULL, NULL};
 517                 restore_coordinates(&loc, t, json);
 518                 if (loc.monitor != NULL && loc.desktop != NULL) {
 519                         history_add(loc.monitor, loc.desktop, loc.node);
 520                 }
 521         }
 522 }
 523
 524 void restore_coordinates(coordinates_t *loc, jsmntok_t **t, char *json)
 525 {
 526         int s = (*t)->size;
 527         (*t)++;
 528
 529         for (int i = 0; i < s; i++) {
 530                 if (keyeq("monitorName", *t, json)) {
 531                         (*t)++;
 532                         char *name = copy_string(json + (*t)->start, (*t)->end - (*t)->start);
 533                         loc->monitor = find_monitor(name);
 534                         free(name);
 535                 } else if (keyeq("desktopName", *t, json)) {
 536                         (*t)++;
 537                         char *name = copy_string(json + (*t)->start, (*t)->end - (*t)->start);
 538                         loc->desktop = find_desktop_in(name, loc->monitor);
 539                         free(name);
 540                 } else if (keyeq("nodeId", *t, json)) {
 541                         (*t)++;
 542                         uint32_t id;
 543                         sscanf(json + (*t)->start, "%u", &id);
 544                         loc->node = find_by_id_in(loc->desktop!=NULL?loc->desktop->root:NULL, id);
 545                 }
 546                 (*t)++;
 547         }
 548 }
 549
 550 void restore_stack(jsmntok_t **t, char *json)
 551 {
 552         int s = (*t)->size;
 553         (*t)++;
 554
 555         for (int i = 0; i < s; i++) {
 556                 uint32_t id;
 557                 sscanf(json + (*t)->start, "%u", &id);
 558                 coordinates_t loc;
 559                 if (locate_window(id, &loc)) {
 560                         stack_insert_after(stack_tail, loc.node);
 561                 }
 562                 (*t)++;
 563         }
 564 }
 565
 566 void restore_wm_state(xcb_atom_t *w, jsmntok_t **t, char *json)
 567 {
 568         int s = (*t)->size;
 569         (*t)++;
 570
 571         for (int i = 0; i < s; i++) {
 572                 sscanf(json + (*t)->start, "%u", &w[i]);
 573                 (*t)++;
 574         }
 575 }
 576
 577 #undef RESTORE_INT
 578 #undef RESTORE_UINT
 579 #undef RESTORE_USINT
 580 #undef RESTORE_DOUBLE
 581 #undef RESTORE_ANY
 582 #undef RESTORE_BOOL
 583
 584 bool keyeq(char *s, jsmntok_t *key, char *json)
 585 {
 586         size_t n = key->end - key->start;
 587         return (strlen(s) == n && strncmp(s, json + key->start, n) == 0);
 588 }