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         LOG("attaching\n");
  77         con_attach(json_node, json_node->parent, true);
  78         LOG("Creating window\n");
  79         x_con_init(json_node, json_node->depth);
  80         json_node = json_node->parent;
  81     }
  82     if (parsing_rect)
  83         parsing_rect = false;
  84     if (parsing_window_rect)
  85         parsing_window_rect = false;
  86     if (parsing_geometry)
  87         parsing_geometry = false;
  88     return 1;
  89 }
  90
  91 static int json_end_array(void *ctx) {
  92     LOG("end of array\n");
  93     parsing_swallows = false;
  94     if (parsing_focus) {
  95         /* Clear the list of focus mappings */
  96         struct focus_mapping *mapping;
  97         TAILQ_FOREACH_REVERSE(mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
  98             LOG("focus (reverse) %d\n", mapping->old_id);
  99             Con *con;
 100             TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
 101                 if (con->old_id != mapping->old_id)
 102                     continue;
 103                 LOG("got it! %p\n", con);
 104                 /* Move this entry to the top of the focus list. */
 105                 TAILQ_REMOVE(&(json_node->focus_head), con, focused);
 106                 TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
 107                 break;
 108             }
 109         }
 110         while (!TAILQ_EMPTY(&focus_mappings)) {
 111             mapping = TAILQ_FIRST(&focus_mappings);
 112             TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
 113             free(mapping);
 114         }
 115         parsing_focus = false;
 116     }
 117     return 1;
 118 }
 119
 120 #if YAJL_MAJOR < 2
 121 static int json_key(void *ctx, const unsigned char *val, unsigned int len) {
 122 #else
 123 static int json_key(void *ctx, const unsigned char *val, size_t len) {
 124 #endif
 125     LOG("key: %.*s\n", (int)len, val);
 126     FREE(last_key);
 127     last_key = scalloc((len+1) * sizeof(char));
 128     memcpy(last_key, val, len);
 129     if (strcasecmp(last_key, "swallows") == 0)
 130         parsing_swallows = true;
 131
 132     if (strcasecmp(last_key, "rect") == 0)
 133         parsing_rect = true;
 134
 135     if (strcasecmp(last_key, "window_rect") == 0)
 136         parsing_window_rect = true;
 137
 138     if (strcasecmp(last_key, "geometry") == 0)
 139         parsing_geometry = true;
 140
 141     if (strcasecmp(last_key, "focus") == 0)
 142         parsing_focus = true;
 143
 144     return 1;
 145 }
 146
 147 #if YAJL_MAJOR >= 2
 148 static int json_string(void *ctx, const unsigned char *val, size_t len) {
 149 #else
 150 static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
 151 #endif
 152     LOG("string: %.*s for key %s\n", (int)len, val, last_key);
 153     if (parsing_swallows) {
 154         char *sval;
 155         sasprintf(&sval, "%.*s", len, val);
 156         if (strcasecmp(last_key, "class") == 0) {
 157             current_swallow->class = regex_new(sval);
 158         } else if (strcasecmp(last_key, "instance") == 0) {
 159             current_swallow->instance = regex_new(sval);
 160         } else if (strcasecmp(last_key, "window_role") == 0) {
 161             current_swallow->window_role = regex_new(sval);
 162         } else if (strcasecmp(last_key, "title") == 0) {
 163             current_swallow->title = regex_new(sval);
 164         } else {
 165             ELOG("swallow key %s unknown\n", last_key);
 166         }
 167         free(sval);
 168     } else {
 169         if (strcasecmp(last_key, "name") == 0) {
 170             json_node->name = scalloc((len+1) * sizeof(char));
 171             memcpy(json_node->name, val, len);
 172         } else if (strcasecmp(last_key, "sticky_group") == 0) {
 173             json_node->sticky_group = scalloc((len+1) * sizeof(char));
 174             memcpy(json_node->sticky_group, val, len);
 175             LOG("sticky_group of this container is %s\n", json_node->sticky_group);
 176         } else if (strcasecmp(last_key, "orientation") == 0) {
 177             /* Upgrade path from older versions of i3 (doing an inplace restart
 178              * to a newer version):
 179              * "orientation" is dumped before "layout". Therefore, we store
 180              * whether the orientation was horizontal or vertical in the
 181              * last_split_layout. When we then encounter layout == "default",
 182              * we will use the last_split_layout as layout instead. */
 183             char *buf = NULL;
 184             sasprintf(&buf, "%.*s", (int)len, val);
 185             if (strcasecmp(buf, "none") == 0 ||
 186                 strcasecmp(buf, "horizontal") == 0)
 187                 json_node->last_split_layout = L_SPLITH;
 188             else if (strcasecmp(buf, "vertical") == 0)
 189                 json_node->last_split_layout = L_SPLITV;
 190             else LOG("Unhandled orientation: %s\n", buf);
 191             free(buf);
 192         } else if (strcasecmp(last_key, "border") == 0) {
 193             char *buf = NULL;
 194             sasprintf(&buf, "%.*s", (int)len, val);
 195             if (strcasecmp(buf, "none") == 0)
 196                 json_node->border_style = BS_NONE;
 197             else if (strcasecmp(buf, "1pixel") == 0) {
 198                 json_node->border_style = BS_PIXEL;
 199                 json_node->current_border_width = 1;
 200             } else if (strcasecmp(buf, "pixel") == 0)
 201                 json_node->border_style = BS_PIXEL;
 202             else if (strcasecmp(buf, "normal") == 0)
 203                 json_node->border_style = BS_NORMAL;
 204             else LOG("Unhandled \"border\": %s\n", buf);
 205             free(buf);
 206         } else if (strcasecmp(last_key, "type") == 0) {
 207             char *buf = NULL;
 208             sasprintf(&buf, "%.*s", (int)len, val);
 209             if (strcasecmp(buf, "root") == 0)
 210                 json_node->type = CT_ROOT;
 211             else if (strcasecmp(buf, "output") == 0)
 212                 json_node->type = CT_OUTPUT;
 213             else if (strcasecmp(buf, "con") == 0)
 214                 json_node->type = CT_CON;
 215             else if (strcasecmp(buf, "floating_con") == 0)
 216                 json_node->type = CT_FLOATING_CON;
 217             else if (strcasecmp(buf, "workspace") == 0)
 218                 json_node->type = CT_WORKSPACE;
 219             else if (strcasecmp(buf, "dockarea") == 0)
 220                 json_node->type = CT_DOCKAREA;
 221             else LOG("Unhandled \"type\": %s\n", buf);
 222             free(buf);
 223         } else if (strcasecmp(last_key, "layout") == 0) {
 224             char *buf = NULL;
 225             sasprintf(&buf, "%.*s", (int)len, val);
 226             if (strcasecmp(buf, "default") == 0)
 227                 /* This set above when we read "orientation". */
 228                 json_node->layout = json_node->last_split_layout;
 229             else if (strcasecmp(buf, "stacked") == 0)
 230                 json_node->layout = L_STACKED;
 231             else if (strcasecmp(buf, "tabbed") == 0)
 232                 json_node->layout = L_TABBED;
 233             else if (strcasecmp(buf, "dockarea") == 0)
 234                 json_node->layout = L_DOCKAREA;
 235             else if (strcasecmp(buf, "output") == 0)
 236                 json_node->layout = L_OUTPUT;
 237             else if (strcasecmp(buf, "splith") == 0)
 238                 json_node->layout = L_SPLITH;
 239             else if (strcasecmp(buf, "splitv") == 0)
 240                 json_node->layout = L_SPLITV;
 241             else LOG("Unhandled \"layout\": %s\n", buf);
 242             free(buf);
 243         } else if (strcasecmp(last_key, "workspace_layout") == 0) {
 244             char *buf = NULL;
 245             sasprintf(&buf, "%.*s", (int)len, val);
 246             if (strcasecmp(buf, "default") == 0)
 247                 json_node->workspace_layout = L_DEFAULT;
 248             else if (strcasecmp(buf, "stacked") == 0)
 249                 json_node->workspace_layout = L_STACKED;
 250             else if (strcasecmp(buf, "tabbed") == 0)
 251                 json_node->workspace_layout = L_TABBED;
 252             else LOG("Unhandled \"workspace_layout\": %s\n", buf);
 253             free(buf);
 254         } else if (strcasecmp(last_key, "last_split_layout") == 0) {
 255             char *buf = NULL;
 256             sasprintf(&buf, "%.*s", (int)len, val);
 257             if (strcasecmp(buf, "splith") == 0)
 258                 json_node->last_split_layout = L_SPLITH;
 259             else if (strcasecmp(buf, "splitv") == 0)
 260                 json_node->last_split_layout = L_SPLITV;
 261             else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
 262             free(buf);
 263         } else if (strcasecmp(last_key, "mark") == 0) {
 264             char *buf = NULL;
 265             sasprintf(&buf, "%.*s", (int)len, val);
 266             json_node->mark = buf;
 267         } else if (strcasecmp(last_key, "floating") == 0) {
 268             char *buf = NULL;
 269             sasprintf(&buf, "%.*s", (int)len, val);
 270             if (strcasecmp(buf, "auto_off") == 0)
 271                 json_node->floating = FLOATING_AUTO_OFF;
 272             else if (strcasecmp(buf, "auto_on") == 0)
 273                 json_node->floating = FLOATING_AUTO_ON;
 274             else if (strcasecmp(buf, "user_off") == 0)
 275                 json_node->floating = FLOATING_USER_OFF;
 276             else if (strcasecmp(buf, "user_on") == 0)
 277                 json_node->floating = FLOATING_USER_ON;
 278             free(buf);
 279         } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
 280             char *buf = NULL;
 281             sasprintf(&buf, "%.*s", (int)len, val);
 282             if (strcasecmp(buf, "none") == 0)
 283                 json_node->scratchpad_state = SCRATCHPAD_NONE;
 284             else if (strcasecmp(buf, "fresh") == 0)
 285                 json_node->scratchpad_state = SCRATCHPAD_FRESH;
 286             else if (strcasecmp(buf, "changed") == 0)
 287                 json_node->scratchpad_state = SCRATCHPAD_CHANGED;
 288             free(buf);
 289         }
 290     }
 291     return 1;
 292 }
 293
 294 #if YAJL_MAJOR >= 2
 295 static int json_int(void *ctx, long long val) {
 296     LOG("int %lld for key %s\n", val, last_key);
 297 #else
 298 static int json_int(void *ctx, long val) {
 299     LOG("int %ld for key %s\n", val, last_key);
 300 #endif
 301     /* For backwards compatibility with i3 < 4.8 */
 302     if (strcasecmp(last_key, "type") == 0)
 303         json_node->type = val;
 304
 305     if (strcasecmp(last_key, "fullscreen_mode") == 0)
 306         json_node->fullscreen_mode = val;
 307
 308     if (strcasecmp(last_key, "num") == 0)
 309         json_node->num = val;
 310
 311     if (strcasecmp(last_key, "current_border_width") == 0)
 312         json_node->current_border_width = val;
 313
 314     if (strcasecmp(last_key, "depth") == 0)
 315         json_node->depth = val;
 316
 317     if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
 318         json_node->old_id = val;
 319
 320     if (parsing_focus) {
 321         struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
 322         focus_mapping->old_id = val;
 323         TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
 324     }
 325
 326     if (parsing_rect || parsing_window_rect || parsing_geometry) {
 327         Rect *r;
 328         if (parsing_rect)
 329             r = &(json_node->rect);
 330         else if (parsing_window_rect)
 331             r = &(json_node->window_rect);
 332         else r = &(json_node->geometry);
 333         if (strcasecmp(last_key, "x") == 0)
 334             r->x = val;
 335         else if (strcasecmp(last_key, "y") == 0)
 336             r->y = val;
 337         else if (strcasecmp(last_key, "width") == 0)
 338             r->width = val;
 339         else if (strcasecmp(last_key, "height") == 0)
 340             r->height = val;
 341         else ELOG("WARNING: unknown key %s in rect\n", last_key);
 342         DLOG("rect now: (%d, %d, %d, %d)\n",
 343                 r->x, r->y, r->width, r->height);
 344     }
 345     if (parsing_swallows) {
 346         if (strcasecmp(last_key, "id") == 0) {
 347             current_swallow->id = val;
 348         }
 349         if (strcasecmp(last_key, "dock") == 0) {
 350             current_swallow->dock = val;
 351         }
 352         if (strcasecmp(last_key, "insert_where") == 0) {
 353             current_swallow->insert_where = val;
 354         }
 355     }
 356
 357     return 1;
 358 }
 359
 360 static int json_bool(void *ctx, int val) {
 361     LOG("bool %d for key %s\n", val, last_key);
 362     if (strcasecmp(last_key, "focused") == 0 && val) {
 363         to_focus = json_node;
 364     }
 365
 366     if (parsing_swallows) {
 367         if (strcasecmp(last_key, "restart_mode") == 0)
 368             current_swallow->restart_mode = val;
 369     }
 370
 371     return 1;
 372 }
 373
 374 static int json_double(void *ctx, double val) {
 375     LOG("double %f for key %s\n", val, last_key);
 376     if (strcasecmp(last_key, "percent") == 0) {
 377         json_node->percent = val;
 378     }
 379     return 1;
 380 }
 381
 382 void tree_append_json(const char *filename) {
 383     /* TODO: percent of other windows are not correctly fixed at the moment */
 384     FILE *f;
 385     if ((f = fopen(filename, "r")) == NULL) {
 386         LOG("Cannot open file \"%s\"\n", filename);
 387         return;
 388     }
 389     struct stat stbuf;
 390     if (fstat(fileno(f), &stbuf) != 0) {
 391         LOG("Cannot fstat() the file\n");
 392         fclose(f);
 393         return;
 394     }
 395     char *buf = smalloc(stbuf.st_size);
 396     int n = fread(buf, 1, stbuf.st_size, f);
 397     if (n != stbuf.st_size) {
 398         LOG("File \"%s\" could not be read entirely, not loading.\n", filename);
 399         fclose(f);
 400         return;
 401     }
 402     LOG("read %d bytes\n", n);
 403     yajl_gen g;
 404     yajl_handle hand;
 405     yajl_callbacks callbacks = {
 406         .yajl_boolean = json_bool,
 407         .yajl_integer = json_int,
 408         .yajl_double = json_double,
 409         .yajl_string = json_string,
 410         .yajl_start_map = json_start_map,
 411         .yajl_map_key = json_key,
 412         .yajl_end_map = json_end_map,
 413         .yajl_end_array = json_end_array,
 414     };
 415 #if YAJL_MAJOR >= 2
 416     g = yajl_gen_alloc(NULL);
 417     hand = yajl_alloc(&callbacks, NULL, (void*)g);
 418 #else
 419     g = yajl_gen_alloc(NULL, NULL);
 420     hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
 421 #endif
 422     /* Allowing comments allows for more user-friendly layout files. */
 423     yajl_config(hand, yajl_allow_comments, true);
 424     /* Allow multiple values, i.e. multiple nodes to attach */
 425     yajl_config(hand, yajl_allow_multiple_values, true);
 426     yajl_status stat;
 427     json_node = focused;
 428     to_focus = NULL;
 429     parsing_rect = false;
 430     parsing_window_rect = false;
 431     parsing_geometry = false;
 432     setlocale(LC_NUMERIC, "C");
 433     stat = yajl_parse(hand, (const unsigned char*)buf, n);
 434     if (stat != yajl_status_ok)
 435     {
 436         unsigned char *str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
 437         ELOG("JSON parsing error: %s\n", str);
 438         yajl_free_error(hand, str);
 439     }
 440
 441     setlocale(LC_NUMERIC, "");
 442 #if YAJL_MAJOR >= 2
 443     yajl_complete_parse(hand);
 444 #else
 445     yajl_parse_complete(hand);
 446 #endif
 447
 448     fclose(f);
 449     if (to_focus)
 450         con_focus(to_focus);
 451 }