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                         focusedMonitorName = copy_string(t+1, json);
 121                         t++;
 122                 } else if (keyeq("primaryMonitorName", t, json)) {
 123                         free(primaryMonitorName);
 124                         primaryMonitorName = copy_string(t+1, json);
 125                         t++;
 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                                 add_monitor(m);
 136                         }
 137                         continue;
 138                 } else if (keyeq("focusHistory", t, json)) {
 139                         t++;
 140                         restore_history(&t, json);
 141                         continue;
 142                 } else if (keyeq("stackingList", t, json)) {
 143                         t++;
 144                         restore_stack(&t, json);
 145                         continue;
 146                 }
 147                 t++;
 148         }
 149
 150         if (focusedMonitorName != NULL) {
 151                 coordinates_t loc;
 152                 if (locate_monitor(focusedMonitorName, &loc)) {
 153                         mon = loc.monitor;
 154                 }
 155         }
 156
 157         if (primaryMonitorName != NULL) {
 158                 coordinates_t loc;
 159                 if (locate_monitor(primaryMonitorName, &loc)) {
 160                         pri_mon = loc.monitor;
 161                 }
 162         }
 163
 164         free(focusedMonitorName);
 165         free(primaryMonitorName);
 166
 167         for (monitor_t *m = mon_head; m != NULL; m = m->next) {
 168                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
 169                         refresh_presel_feebacks_in(d->root, d, m);
 170                         restack_presel_feedback(d);
 171                         for (node_t *n = first_extrema(d->root); n != NULL; n = next_leaf(n, d->root)) {
 172                                 uint32_t values[] = {CLIENT_EVENT_MASK | (focus_follows_pointer ? XCB_EVENT_MASK_ENTER_WINDOW : 0)};
 173                                 xcb_change_window_attributes(dpy, n->id, XCB_CW_EVENT_MASK, values);
 174                         }
 175                 }
 176         }
 177
 178         ewmh_update_client_list(false);
 179         ewmh_update_client_list(true);
 180         ewmh_update_active_window();
 181         ewmh_update_number_of_desktops();
 182         ewmh_update_current_desktop();
 183         ewmh_update_desktop_names();
 184
 185         free(tokens);
 186         free(json);
 187
 188         return true;
 189 }
 190
 191 #define RESTORE_INT(k, p) \
 192         } else if (keyeq(#k, *t, json)) { \
 193                 (*t)++; \
 194                 sscanf(json + (*t)->start, "%i", p);
 195
 196 #define RESTORE_UINT(k, p) \
 197         } else if (keyeq(#k, *t, json)) { \
 198                 (*t)++; \
 199                 sscanf(json + (*t)->start, "%u", p);
 200
 201 #define RESTORE_USINT(k, p) \
 202         } else if (keyeq(#k, *t, json)) { \
 203                 (*t)++; \
 204                 sscanf(json + (*t)->start, "%hu", p);
 205
 206 #define RESTORE_DOUBLE(k, p) \
 207         } else if (keyeq(#k, *t, json)) { \
 208                 (*t)++; \
 209                 sscanf(json + (*t)->start, "%lf", p);
 210
 211 #define RESTORE_ANY(k, p, f) \
 212         } else if (keyeq(#k, *t, json)) { \
 213                 (*t)++; \
 214                 char *val = copy_string(*t, json); \
 215                 f(val, p); \
 216                 free(val);
 217
 218 #define RESTORE_BOOL(k, p)  RESTORE_ANY(k, p, parse_bool)
 219
 220 monitor_t *restore_monitor(jsmntok_t **t, char *json)
 221 {
 222         int num = (*t)->size;
 223         (*t)++;
 224         monitor_t *m = make_monitor(NULL);
 225         char *focusedDesktopName = NULL;
 226
 227         for (int i = 0; i < num; i++) {
 228                 if (keyeq("name", *t, json)) {
 229                         (*t)++;
 230                         snprintf(m->name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
 231                 RESTORE_UINT(id, &m->id)
 232                 RESTORE_BOOL(wired, &m->wired)
 233                 RESTORE_INT(topPadding, &m->top_padding)
 234                 RESTORE_INT(rightPadding, &m->right_padding)
 235                 RESTORE_INT(bottomPadding, &m->bottom_padding)
 236                 RESTORE_INT(leftPadding, &m->left_padding)
 237                 RESTORE_UINT(stickyCount, &m->sticky_count)
 238                 } else if (keyeq("rectangle", *t, json)) {
 239                         (*t)++;
 240                         restore_rectangle(&m->rectangle, t, json);
 241                         update_root(m, &m->rectangle);
 242                         continue;
 243                 } else if (keyeq("focusedDesktopName", *t, json)) {
 244                         free(focusedDesktopName);
 245                         (*t)++;
 246                         focusedDesktopName = copy_string(*t, json);
 247                 } else if (keyeq("desktops", *t, json)) {
 248                         (*t)++;
 249                         int s = (*t)->size;
 250                         (*t)++;
 251                         for (int j = 0; j < s; j++) {
 252                                 desktop_t *d = restore_desktop(t, json);
 253                                 add_desktop(m, d);
 254                         }
 255                         continue;
 256                 } else {
 257                         warn("Restore monitor: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
 258                         (*t)++;
 259                 }
 260                 (*t)++;
 261         }
 262
 263         if (focusedDesktopName != NULL) {
 264                 for (desktop_t *d = m->desk_head; d != NULL; d = d->next) {
 265                         if (streq(focusedDesktopName, d->name)) {
 266                                 m->desk = d;
 267                                 break;
 268                         }
 269                 }
 270         }
 271
 272         free(focusedDesktopName);
 273
 274         return m;
 275 }
 276
 277 desktop_t *restore_desktop(jsmntok_t **t, char *json)
 278 {
 279         int s = (*t)->size;
 280         (*t)++;
 281         desktop_t *d = make_desktop(NULL);
 282         xcb_window_t focusedNodeId = XCB_NONE;
 283
 284         for (int i = 0; i < s; i++) {
 285                 if (keyeq("name", *t, json)) {
 286                         (*t)++;
 287                         snprintf(d->name, (*t)->end - (*t)->start + 1, "%s", json + (*t)->start);
 288                 } else if (keyeq("layout", *t, json)) {
 289                         (*t)++;
 290                         char *val = copy_string(*t, json);
 291                         layout_t lyt;
 292                         if (parse_layout(val, &lyt)) {
 293                                 d->layout = lyt;
 294                         }
 295                         free(val);
 296                 RESTORE_INT(topPadding, &d->top_padding)
 297                 RESTORE_INT(rightPadding, &d->right_padding)
 298                 RESTORE_INT(bottomPadding, &d->bottom_padding)
 299                 RESTORE_INT(leftPadding, &d->left_padding)
 300                 RESTORE_INT(windowGap, &d->window_gap)
 301                 RESTORE_UINT(borderWidth, &d->border_width)
 302                 } else if (keyeq("focusedNodeId", *t, json)) {
 303                         (*t)++;
 304                         sscanf(json + (*t)->start, "%u", &focusedNodeId);
 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_ANY(vacant, &n->vacant, parse_bool)
 342                         RESTORE_ANY(sticky, &n->sticky, parse_bool)
 343                         RESTORE_ANY(private, &n->private, parse_bool)
 344                         RESTORE_ANY(locked, &n->locked, parse_bool)
 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(icccmFocus, &c->icccm_focus)
 433                         RESTORE_BOOL(icccmInput, &c->icccm_input)
 434                         RESTORE_USINT(minWidth, &c->min_width)
 435                         RESTORE_USINT(maxWidth, &c->max_width)
 436                         RESTORE_USINT(minHeight, &c->min_height)
 437                         RESTORE_USINT(maxHeight, &c->max_height)
 438                         RESTORE_INT(wmStatesCount, &c->wm_states_count)
 439                         } else if (keyeq("wmState", *t, json)) {
 440                                 (*t)++;
 441                                 restore_wm_state(c->wm_state, t, json);
 442                                 continue;
 443                         } else if (keyeq("tiledRectangle", *t, json)) {
 444                                 (*t)++;
 445                                 restore_rectangle(&c->tiled_rectangle, t, json);
 446                                 continue;
 447                         } else if (keyeq("floatingRectangle", *t, json)) {
 448                                 (*t)++;
 449                                 restore_rectangle(&c->floating_rectangle, t, json);
 450                                 continue;
 451                         } else {
 452                                 warn("Restore client: unknown key: '%.*s'.\n", (*t)->end - (*t)->start, json + (*t)->start);
 453                                 (*t)++;
 454                         }
 455
 456                         (*t)++;
 457                 }
 458
 459                 return c;
 460         }
 461 }
 462
 463 void restore_rectangle(xcb_rectangle_t *r, jsmntok_t **t, char *json)
 464 {
 465         int s = (*t)->size;
 466         (*t)++;
 467
 468         for (int i = 0; i < s; i++) {
 469                 if (keyeq("x", *t, json)) {
 470                         (*t)++;
 471                         sscanf(json + (*t)->start, "%hi", &r->x);
 472                 } else if (keyeq("y", *t, json)) {
 473                         (*t)++;
 474                         sscanf(json + (*t)->start, "%hi", &r->y);
 475                 } else if (keyeq("width", *t, json)) {
 476                         (*t)++;
 477                         sscanf(json + (*t)->start, "%hu", &r->width);
 478                 } else if (keyeq("height", *t, json)) {
 479                         (*t)++;
 480                         sscanf(json + (*t)->start, "%hu", &r->height);
 481                 }
 482                 (*t)++;
 483         }
 484 }
 485
 486 void restore_history(jsmntok_t **t, char *json)
 487 {
 488         int s = (*t)->size;
 489         (*t)++;
 490
 491         for (int i = 0; i < s; i++) {
 492                 coordinates_t loc = {NULL, NULL, NULL};
 493                 restore_coordinates(&loc, t, json);
 494                 if (loc.monitor != NULL && loc.desktop != NULL) {
 495                         history_add(loc.monitor, loc.desktop, loc.node);
 496                 }
 497         }
 498 }
 499
 500 void restore_coordinates(coordinates_t *loc, jsmntok_t **t, char *json)
 501 {
 502         int s = (*t)->size;
 503         (*t)++;
 504
 505         for (int i = 0; i < s; i++) {
 506                 if (keyeq("monitorName", *t, json)) {
 507                         (*t)++;
 508                         char *name = copy_string(*t, json);
 509                         loc->monitor = find_monitor(name);
 510                         free(name);
 511                 } else if (keyeq("desktopName", *t, json)) {
 512                         (*t)++;
 513                         char *name = copy_string(*t, json);
 514                         loc->desktop = find_desktop_in(name, loc->monitor);
 515                         free(name);
 516                 } else if (keyeq("nodeId", *t, json)) {
 517                         (*t)++;
 518                         uint32_t id;
 519                         sscanf(json + (*t)->start, "%u", &id);
 520                         loc->node = find_by_id_in(loc->desktop!=NULL?loc->desktop->root:NULL, id);
 521                 }
 522                 (*t)++;
 523         }
 524 }
 525
 526 void restore_stack(jsmntok_t **t, char *json)
 527 {
 528         int s = (*t)->size;
 529         (*t)++;
 530
 531         for (int i = 0; i < s; i++) {
 532                 uint32_t id;
 533                 sscanf(json + (*t)->start, "%u", &id);
 534                 coordinates_t loc;
 535                 if (locate_window(id, &loc)) {
 536                         stack_insert_after(stack_tail, loc.node);
 537                 }
 538                 (*t)++;
 539         }
 540 }
 541
 542 void restore_wm_state(xcb_atom_t *w, jsmntok_t **t, char *json)
 543 {
 544         int s = (*t)->size;
 545         (*t)++;
 546
 547         for (int i = 0; i < s; i++) {
 548                 sscanf(json + (*t)->start, "%u", &w[i]);
 549                 (*t)++;
 550         }
 551 }
 552
 553 #undef RESTORE_INT
 554 #undef RESTORE_UINT
 555 #undef RESTORE_USINT
 556 #undef RESTORE_DOUBLE
 557 #undef RESTORE_ANY
 558 #undef RESTORE_BOOL
 559
 560 bool keyeq(char *s, jsmntok_t *key, char *json)
 561 {
 562         size_t n = key->end - key->start;
 563         return (strlen(s) == n && strncmp(s, json + key->start, n) == 0);
 564 }
 565
 566 char *copy_string(jsmntok_t *tok, char *json)
 567 {
 568         size_t len = tok->end - tok->start + 1;
 569         char *res = malloc(len * sizeof(char));
 570         if (res == NULL) {
 571                 perror("Copy string: malloc");
 572                 return NULL;
 573         }
 574         strncpy(res, json+tok->start, len-1);
 575         res[len-1] = '\0';
 576         return res;
 577 }