git.sur5r.net Git - i3/i3/blob - src/load_layout.c

   1 #undef I3__FILE__
   2 #define I3__FILE__ "load_layout.c"
   3 /*
   4  * vim:ts=4:sw=4:expandtab
   5  *
   6  * i3 - an improved dynamic tiling window manager
   7  * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
   8  *
   9  * load_layout.c: Restore (parts of) the layout, for example after an inplace
  10  *                restart.
  11  *
  12  */
  13 #include "all.h"
  14
  15 #include <yajl/yajl_common.h>
  16 #include <yajl/yajl_gen.h>
  17 #include <yajl/yajl_parse.h>
  18 #include <yajl/yajl_version.h>
  19
  20 /* TODO: refactor the whole parsing thing */
  21
  22 static char *last_key;
  23 static Con *json_node;
  24 static Con *to_focus;
  25 static bool parsing_swallows;
  26 static bool parsing_rect;
  27 static bool parsing_window_rect;
  28 static bool parsing_geometry;
  29 static bool parsing_focus;
  30 struct Match *current_swallow;
  31
  32 /* This list is used for reordering the focus stack after parsing the 'focus'
  33  * array. */
  34 struct focus_mapping {
  35     int old_id;
  36     TAILQ_ENTRY(focus_mapping) focus_mappings;
  37 };
  38
  39 static TAILQ_HEAD(focus_mappings_head, focus_mapping) focus_mappings =
  40     TAILQ_HEAD_INITIALIZER(focus_mappings);
  41
  42 static int json_start_map(void *ctx) {
  43     LOG("start of map, last_key = %s\n", last_key);
  44     if (parsing_swallows) {
  45         LOG("creating new swallow\n");
  46         current_swallow = smalloc(sizeof(Match));
  47         match_init(current_swallow);
  48         TAILQ_INSERT_TAIL(&(json_node->swallow_head), current_swallow, matches);
  49     } else {
  50         if (!parsing_rect && !parsing_window_rect && !parsing_geometry) {
  51             if (last_key && strcasecmp(last_key, "floating_nodes") == 0) {
  52                 DLOG("New floating_node\n");
  53                 Con *ws = con_get_workspace(json_node);
  54                 json_node = con_new_skeleton(NULL, NULL);
  55                 json_node->parent = ws;
  56                 DLOG("Parent is workspace = %p\n", ws);
  57             } else {
  58                 Con *parent = json_node;
  59                 json_node = con_new_skeleton(NULL, NULL);
  60                 json_node->parent = parent;
  61             }
  62         }
  63     }
  64     return 1;
  65 }
  66
  67 static int json_end_map(void *ctx) {
  68     LOG("end of map\n");
  69     if (!parsing_swallows && !parsing_rect && !parsing_window_rect && !parsing_geometry) {
  70         /* Set a few default values to simplify manually crafted layout files. */
  71         if (json_node->layout == L_DEFAULT) {
  72             DLOG("Setting layout = L_SPLITH\n");
  73             json_node->layout = L_SPLITH;
  74         }
  75
  76         /* Sanity check: swallow criteria don’t make any sense on a split
  77          * container. */
  78         if (con_is_split(json_node) > 0 && !TAILQ_EMPTY(&(json_node->swallow_head))) {
  79             DLOG("sanity check: removing swallows specification from split container\n");
  80             while (!TAILQ_EMPTY(&(json_node->swallow_head))) {
  81                 Match *match = TAILQ_FIRST(&(json_node->swallow_head));
  82                 TAILQ_REMOVE(&(json_node->swallow_head), match, matches);
  83                 match_free(match);
  84             }
  85         }
  86
  87         LOG("attaching\n");
  88         con_attach(json_node, json_node->parent, true);
  89         LOG("Creating window\n");
  90         x_con_init(json_node, json_node->depth);
  91         json_node = json_node->parent;
  92     }
  93     if (parsing_rect)
  94         parsing_rect = false;
  95     if (parsing_window_rect)
  96         parsing_window_rect = false;
  97     if (parsing_geometry)
  98         parsing_geometry = false;
  99     return 1;
 100 }
 101
 102 static int json_end_array(void *ctx) {
 103     LOG("end of array\n");
 104     if (!parsing_swallows && !parsing_focus) {
 105         con_fix_percent(json_node);
 106     }
 107     if (parsing_swallows) {
 108         parsing_swallows = false;
 109     }
 110     if (parsing_focus) {
 111         /* Clear the list of focus mappings */
 112         struct focus_mapping *mapping;
 113         TAILQ_FOREACH_REVERSE (mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
 114             LOG("focus (reverse) %d\n", mapping->old_id);
 115             Con *con;
 116             TAILQ_FOREACH (con, &(json_node->focus_head), focused) {
 117                 if (con->old_id != mapping->old_id)
 118                     continue;
 119                 LOG("got it! %p\n", con);
 120                 /* Move this entry to the top of the focus list. */
 121                 TAILQ_REMOVE(&(json_node->focus_head), con, focused);
 122                 TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
 123                 break;
 124             }
 125         }
 126         while (!TAILQ_EMPTY(&focus_mappings)) {
 127             mapping = TAILQ_FIRST(&focus_mappings);
 128             TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
 129             free(mapping);
 130         }
 131         parsing_focus = false;
 132     }
 133     return 1;
 134 }
 135
 136 static int json_key(void *ctx, const unsigned char *val, size_t len) {
 137     LOG("key: %.*s\n", (int)len, val);
 138     FREE(last_key);
 139     last_key = scalloc((len + 1) * sizeof(char));
 140     memcpy(last_key, val, len);
 141     if (strcasecmp(last_key, "swallows") == 0)
 142         parsing_swallows = true;
 143
 144     if (strcasecmp(last_key, "rect") == 0)
 145         parsing_rect = true;
 146
 147     if (strcasecmp(last_key, "window_rect") == 0)
 148         parsing_window_rect = true;
 149
 150     if (strcasecmp(last_key, "geometry") == 0)
 151         parsing_geometry = true;
 152
 153     if (strcasecmp(last_key, "focus") == 0)
 154         parsing_focus = true;
 155
 156     return 1;
 157 }
 158
 159 static int json_string(void *ctx, const unsigned char *val, size_t len) {
 160     LOG("string: %.*s for key %s\n", (int)len, val, last_key);
 161     if (parsing_swallows) {
 162         char *sval;
 163         sasprintf(&sval, "%.*s", len, val);
 164         if (strcasecmp(last_key, "class") == 0) {
 165             current_swallow->class = regex_new(sval);
 166         } else if (strcasecmp(last_key, "instance") == 0) {
 167             current_swallow->instance = regex_new(sval);
 168         } else if (strcasecmp(last_key, "window_role") == 0) {
 169             current_swallow->window_role = regex_new(sval);
 170         } else if (strcasecmp(last_key, "title") == 0) {
 171             current_swallow->title = regex_new(sval);
 172         } else {
 173             ELOG("swallow key %s unknown\n", last_key);
 174         }
 175         free(sval);
 176     } else {
 177         if (strcasecmp(last_key, "name") == 0) {
 178             json_node->name = scalloc((len + 1) * sizeof(char));
 179             memcpy(json_node->name, val, len);
 180         } else if (strcasecmp(last_key, "sticky_group") == 0) {
 181             json_node->sticky_group = scalloc((len + 1) * sizeof(char));
 182             memcpy(json_node->sticky_group, val, len);
 183             LOG("sticky_group of this container is %s\n", json_node->sticky_group);
 184         } else if (strcasecmp(last_key, "orientation") == 0) {
 185             /* Upgrade path from older versions of i3 (doing an inplace restart
 186              * to a newer version):
 187              * "orientation" is dumped before "layout". Therefore, we store
 188              * whether the orientation was horizontal or vertical in the
 189              * last_split_layout. When we then encounter layout == "default",
 190              * we will use the last_split_layout as layout instead. */
 191             char *buf = NULL;
 192             sasprintf(&buf, "%.*s", (int)len, val);
 193             if (strcasecmp(buf, "none") == 0 ||
 194                 strcasecmp(buf, "horizontal") == 0)
 195                 json_node->last_split_layout = L_SPLITH;
 196             else if (strcasecmp(buf, "vertical") == 0)
 197                 json_node->last_split_layout = L_SPLITV;
 198             else
 199                 LOG("Unhandled orientation: %s\n", buf);
 200             free(buf);
 201         } else if (strcasecmp(last_key, "border") == 0) {
 202             char *buf = NULL;
 203             sasprintf(&buf, "%.*s", (int)len, val);
 204             if (strcasecmp(buf, "none") == 0)
 205                 json_node->border_style = BS_NONE;
 206             else if (strcasecmp(buf, "1pixel") == 0) {
 207                 json_node->border_style = BS_PIXEL;
 208                 json_node->current_border_width = 1;
 209             } else if (strcasecmp(buf, "pixel") == 0)
 210                 json_node->border_style = BS_PIXEL;
 211             else if (strcasecmp(buf, "normal") == 0)
 212                 json_node->border_style = BS_NORMAL;
 213             else
 214                 LOG("Unhandled \"border\": %s\n", buf);
 215             free(buf);
 216         } else if (strcasecmp(last_key, "type") == 0) {
 217             char *buf = NULL;
 218             sasprintf(&buf, "%.*s", (int)len, val);
 219             if (strcasecmp(buf, "root") == 0)
 220                 json_node->type = CT_ROOT;
 221             else if (strcasecmp(buf, "output") == 0)
 222                 json_node->type = CT_OUTPUT;
 223             else if (strcasecmp(buf, "con") == 0)
 224                 json_node->type = CT_CON;
 225             else if (strcasecmp(buf, "floating_con") == 0)
 226                 json_node->type = CT_FLOATING_CON;
 227             else if (strcasecmp(buf, "workspace") == 0)
 228                 json_node->type = CT_WORKSPACE;
 229             else if (strcasecmp(buf, "dockarea") == 0)
 230                 json_node->type = CT_DOCKAREA;
 231             else
 232                 LOG("Unhandled \"type\": %s\n", buf);
 233             free(buf);
 234         } else if (strcasecmp(last_key, "layout") == 0) {
 235             char *buf = NULL;
 236             sasprintf(&buf, "%.*s", (int)len, val);
 237             if (strcasecmp(buf, "default") == 0)
 238                 /* This set above when we read "orientation". */
 239                 json_node->layout = json_node->last_split_layout;
 240             else if (strcasecmp(buf, "stacked") == 0)
 241                 json_node->layout = L_STACKED;
 242             else if (strcasecmp(buf, "tabbed") == 0)
 243                 json_node->layout = L_TABBED;
 244             else if (strcasecmp(buf, "dockarea") == 0)
 245                 json_node->layout = L_DOCKAREA;
 246             else if (strcasecmp(buf, "output") == 0)
 247                 json_node->layout = L_OUTPUT;
 248             else if (strcasecmp(buf, "splith") == 0)
 249                 json_node->layout = L_SPLITH;
 250             else if (strcasecmp(buf, "splitv") == 0)
 251                 json_node->layout = L_SPLITV;
 252             else
 253                 LOG("Unhandled \"layout\": %s\n", buf);
 254             free(buf);
 255         } else if (strcasecmp(last_key, "workspace_layout") == 0) {
 256             char *buf = NULL;
 257             sasprintf(&buf, "%.*s", (int)len, val);
 258             if (strcasecmp(buf, "default") == 0)
 259                 json_node->workspace_layout = L_DEFAULT;
 260             else if (strcasecmp(buf, "stacked") == 0)
 261                 json_node->workspace_layout = L_STACKED;
 262             else if (strcasecmp(buf, "tabbed") == 0)
 263                 json_node->workspace_layout = L_TABBED;
 264             else
 265                 LOG("Unhandled \"workspace_layout\": %s\n", buf);
 266             free(buf);
 267         } else if (strcasecmp(last_key, "last_split_layout") == 0) {
 268             char *buf = NULL;
 269             sasprintf(&buf, "%.*s", (int)len, val);
 270             if (strcasecmp(buf, "splith") == 0)
 271                 json_node->last_split_layout = L_SPLITH;
 272             else if (strcasecmp(buf, "splitv") == 0)
 273                 json_node->last_split_layout = L_SPLITV;
 274             else
 275                 LOG("Unhandled \"last_splitlayout\": %s\n", buf);
 276             free(buf);
 277         } else if (strcasecmp(last_key, "mark") == 0) {
 278             char *buf = NULL;
 279             sasprintf(&buf, "%.*s", (int)len, val);
 280             json_node->mark = buf;
 281         } else if (strcasecmp(last_key, "floating") == 0) {
 282             char *buf = NULL;
 283             sasprintf(&buf, "%.*s", (int)len, val);
 284             if (strcasecmp(buf, "auto_off") == 0)
 285                 json_node->floating = FLOATING_AUTO_OFF;
 286             else if (strcasecmp(buf, "auto_on") == 0)
 287                 json_node->floating = FLOATING_AUTO_ON;
 288             else if (strcasecmp(buf, "user_off") == 0)
 289                 json_node->floating = FLOATING_USER_OFF;
 290             else if (strcasecmp(buf, "user_on") == 0)
 291                 json_node->floating = FLOATING_USER_ON;
 292             free(buf);
 293         } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
 294             char *buf = NULL;
 295             sasprintf(&buf, "%.*s", (int)len, val);
 296             if (strcasecmp(buf, "none") == 0)
 297                 json_node->scratchpad_state = SCRATCHPAD_NONE;
 298             else if (strcasecmp(buf, "fresh") == 0)
 299                 json_node->scratchpad_state = SCRATCHPAD_FRESH;
 300             else if (strcasecmp(buf, "changed") == 0)
 301                 json_node->scratchpad_state = SCRATCHPAD_CHANGED;
 302             free(buf);
 303         }
 304     }
 305     return 1;
 306 }
 307
 308 static int json_int(void *ctx, long long val) {
 309     LOG("int %lld for key %s\n", val, last_key);
 310     /* For backwards compatibility with i3 < 4.8 */
 311     if (strcasecmp(last_key, "type") == 0)
 312         json_node->type = val;
 313
 314     if (strcasecmp(last_key, "fullscreen_mode") == 0)
 315         json_node->fullscreen_mode = val;
 316
 317     if (strcasecmp(last_key, "num") == 0)
 318         json_node->num = val;
 319
 320     if (strcasecmp(last_key, "current_border_width") == 0)
 321         json_node->current_border_width = val;
 322
 323     if (strcasecmp(last_key, "depth") == 0)
 324         json_node->depth = val;
 325
 326     if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
 327         json_node->old_id = val;
 328
 329     if (parsing_focus) {
 330         struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
 331         focus_mapping->old_id = val;
 332         TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
 333     }
 334
 335     if (parsing_rect || parsing_window_rect || parsing_geometry) {
 336         Rect *r;
 337         if (parsing_rect)
 338             r = &(json_node->rect);
 339         else if (parsing_window_rect)
 340             r = &(json_node->window_rect);
 341         else
 342             r = &(json_node->geometry);
 343         if (strcasecmp(last_key, "x") == 0)
 344             r->x = val;
 345         else if (strcasecmp(last_key, "y") == 0)
 346             r->y = val;
 347         else if (strcasecmp(last_key, "width") == 0)
 348             r->width = val;
 349         else if (strcasecmp(last_key, "height") == 0)
 350             r->height = val;
 351         else
 352             ELOG("WARNING: unknown key %s in rect\n", last_key);
 353         DLOG("rect now: (%d, %d, %d, %d)\n",
 354              r->x, r->y, r->width, r->height);
 355     }
 356     if (parsing_swallows) {
 357         if (strcasecmp(last_key, "id") == 0) {
 358             current_swallow->id = val;
 359         }
 360         if (strcasecmp(last_key, "dock") == 0) {
 361             current_swallow->dock = val;
 362         }
 363         if (strcasecmp(last_key, "insert_where") == 0) {
 364             current_swallow->insert_where = val;
 365         }
 366     }
 367
 368     return 1;
 369 }
 370
 371 static int json_bool(void *ctx, int val) {
 372     LOG("bool %d for key %s\n", val, last_key);
 373     if (strcasecmp(last_key, "focused") == 0 && val) {
 374         to_focus = json_node;
 375     }
 376
 377     if (parsing_swallows) {
 378         if (strcasecmp(last_key, "restart_mode") == 0)
 379             current_swallow->restart_mode = val;
 380     }
 381
 382     return 1;
 383 }
 384
 385 static int json_double(void *ctx, double val) {
 386     LOG("double %f for key %s\n", val, last_key);
 387     if (strcasecmp(last_key, "percent") == 0) {
 388         json_node->percent = val;
 389     }
 390     return 1;
 391 }
 392
 393 void tree_append_json(Con *con, const char *filename, char **errormsg) {
 394     FILE *f;
 395     if ((f = fopen(filename, "r")) == NULL) {
 396         LOG("Cannot open file \"%s\"\n", filename);
 397         return;
 398     }
 399     struct stat stbuf;
 400     if (fstat(fileno(f), &stbuf) != 0) {
 401         LOG("Cannot fstat() the file\n");
 402         fclose(f);
 403         return;
 404     }
 405     char *buf = smalloc(stbuf.st_size);
 406     int n = fread(buf, 1, stbuf.st_size, f);
 407     if (n != stbuf.st_size) {
 408         LOG("File \"%s\" could not be read entirely, not loading.\n", filename);
 409         fclose(f);
 410         return;
 411     }
 412     LOG("read %d bytes\n", n);
 413     yajl_gen g;
 414     yajl_handle hand;
 415     static yajl_callbacks callbacks = {
 416         .yajl_boolean = json_bool,
 417         .yajl_integer = json_int,
 418         .yajl_double = json_double,
 419         .yajl_string = json_string,
 420         .yajl_start_map = json_start_map,
 421         .yajl_map_key = json_key,
 422         .yajl_end_map = json_end_map,
 423         .yajl_end_array = json_end_array,
 424     };
 425     g = yajl_gen_alloc(NULL);
 426     hand = yajl_alloc(&callbacks, NULL, (void *)g);
 427     /* Allowing comments allows for more user-friendly layout files. */
 428     yajl_config(hand, yajl_allow_comments, true);
 429     /* Allow multiple values, i.e. multiple nodes to attach */
 430     yajl_config(hand, yajl_allow_multiple_values, true);
 431     yajl_status stat;
 432     json_node = con;
 433     to_focus = NULL;
 434     parsing_swallows = false;
 435     parsing_rect = false;
 436     parsing_window_rect = false;
 437     parsing_geometry = false;
 438     parsing_focus = false;
 439     setlocale(LC_NUMERIC, "C");
 440     stat = yajl_parse(hand, (const unsigned char *)buf, n);
 441     if (stat != yajl_status_ok) {
 442         unsigned char *str = yajl_get_error(hand, 1, (const unsigned char *)buf, n);
 443         ELOG("JSON parsing error: %s\n", str);
 444         if (errormsg != NULL)
 445             *errormsg = sstrdup((const char *)str);
 446         yajl_free_error(hand, str);
 447     }
 448
 449     /* In case not all containers were restored, we need to fix the
 450      * percentages, otherwise i3 will crash immediately when rendering the
 451      * next time. */
 452     con_fix_percent(con);
 453
 454     setlocale(LC_NUMERIC, "");
 455     yajl_complete_parse(hand);
 456
 457     fclose(f);
 458     if (to_focus)
 459         con_focus(to_focus);
 460 }