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(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(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         LOG("attaching\n");
  71         con_attach(json_node, json_node->parent, true);
  72         json_node = json_node->parent;
  73     }
  74     if (parsing_rect)
  75         parsing_rect = false;
  76     if (parsing_window_rect)
  77         parsing_window_rect = false;
  78     if (parsing_geometry)
  79         parsing_geometry = false;
  80     return 1;
  81 }
  82
  83 static int json_end_array(void *ctx) {
  84     LOG("end of array\n");
  85     parsing_swallows = false;
  86     if (parsing_focus) {
  87         /* Clear the list of focus mappings */
  88         struct focus_mapping *mapping;
  89         TAILQ_FOREACH_REVERSE(mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
  90             LOG("focus (reverse) %d\n", mapping->old_id);
  91             Con *con;
  92             TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
  93                 if (con->old_id != mapping->old_id)
  94                     continue;
  95                 LOG("got it! %p\n", con);
  96                 /* Move this entry to the top of the focus list. */
  97                 TAILQ_REMOVE(&(json_node->focus_head), con, focused);
  98                 TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
  99                 break;
 100             }
 101         }
 102         while (!TAILQ_EMPTY(&focus_mappings)) {
 103             mapping = TAILQ_FIRST(&focus_mappings);
 104             TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
 105             free(mapping);
 106         }
 107         parsing_focus = false;
 108     }
 109     return 1;
 110 }
 111
 112 #if YAJL_MAJOR < 2
 113 static int json_key(void *ctx, const unsigned char *val, unsigned int len) {
 114 #else
 115 static int json_key(void *ctx, const unsigned char *val, size_t len) {
 116 #endif
 117     LOG("key: %.*s\n", (int)len, val);
 118     FREE(last_key);
 119     last_key = scalloc((len+1) * sizeof(char));
 120     memcpy(last_key, val, len);
 121     if (strcasecmp(last_key, "swallows") == 0)
 122         parsing_swallows = true;
 123
 124     if (strcasecmp(last_key, "rect") == 0)
 125         parsing_rect = true;
 126
 127     if (strcasecmp(last_key, "window_rect") == 0)
 128         parsing_window_rect = true;
 129
 130     if (strcasecmp(last_key, "geometry") == 0)
 131         parsing_geometry = true;
 132
 133     if (strcasecmp(last_key, "focus") == 0)
 134         parsing_focus = true;
 135
 136     return 1;
 137 }
 138
 139 #if YAJL_MAJOR >= 2
 140 static int json_string(void *ctx, const unsigned char *val, size_t len) {
 141 #else
 142 static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
 143 #endif
 144     LOG("string: %.*s for key %s\n", (int)len, val, last_key);
 145     if (parsing_swallows) {
 146         /* TODO: the other swallowing keys */
 147         if (strcasecmp(last_key, "class") == 0) {
 148             current_swallow->class = scalloc((len+1) * sizeof(char));
 149             memcpy(current_swallow->class, val, len);
 150         }
 151         LOG("unhandled yet: swallow\n");
 152     } else {
 153         if (strcasecmp(last_key, "name") == 0) {
 154             json_node->name = scalloc((len+1) * sizeof(char));
 155             memcpy(json_node->name, val, len);
 156         } else if (strcasecmp(last_key, "sticky_group") == 0) {
 157             json_node->sticky_group = scalloc((len+1) * sizeof(char));
 158             memcpy(json_node->sticky_group, val, len);
 159             LOG("sticky_group of this container is %s\n", json_node->sticky_group);
 160         } else if (strcasecmp(last_key, "orientation") == 0) {
 161             /* Upgrade path from older versions of i3 (doing an inplace restart
 162              * to a newer version):
 163              * "orientation" is dumped before "layout". Therefore, we store
 164              * whether the orientation was horizontal or vertical in the
 165              * last_split_layout. When we then encounter layout == "default",
 166              * we will use the last_split_layout as layout instead. */
 167             char *buf = NULL;
 168             sasprintf(&buf, "%.*s", (int)len, val);
 169             if (strcasecmp(buf, "none") == 0 ||
 170                 strcasecmp(buf, "horizontal") == 0)
 171                 json_node->last_split_layout = L_SPLITH;
 172             else if (strcasecmp(buf, "vertical") == 0)
 173                 json_node->last_split_layout = L_SPLITV;
 174             else LOG("Unhandled orientation: %s\n", buf);
 175             free(buf);
 176         } else if (strcasecmp(last_key, "border") == 0) {
 177             char *buf = NULL;
 178             sasprintf(&buf, "%.*s", (int)len, val);
 179             if (strcasecmp(buf, "none") == 0)
 180                 json_node->border_style = BS_NONE;
 181             else if (strcasecmp(buf, "1pixel") == 0) {
 182                 json_node->border_style = BS_PIXEL;
 183                 json_node->current_border_width = 1;
 184             } else if (strcasecmp(buf, "pixel") == 0)
 185                 json_node->border_style = BS_PIXEL;
 186             else if (strcasecmp(buf, "normal") == 0)
 187                 json_node->border_style = BS_NORMAL;
 188             else LOG("Unhandled \"border\": %s\n", buf);
 189             free(buf);
 190         } else if (strcasecmp(last_key, "layout") == 0) {
 191             char *buf = NULL;
 192             sasprintf(&buf, "%.*s", (int)len, val);
 193             if (strcasecmp(buf, "default") == 0)
 194                 /* This set above when we read "orientation". */
 195                 json_node->layout = json_node->last_split_layout;
 196             else if (strcasecmp(buf, "stacked") == 0)
 197                 json_node->layout = L_STACKED;
 198             else if (strcasecmp(buf, "tabbed") == 0)
 199                 json_node->layout = L_TABBED;
 200             else if (strcasecmp(buf, "dockarea") == 0)
 201                 json_node->layout = L_DOCKAREA;
 202             else if (strcasecmp(buf, "output") == 0)
 203                 json_node->layout = L_OUTPUT;
 204             else if (strcasecmp(buf, "splith") == 0)
 205                 json_node->layout = L_SPLITH;
 206             else if (strcasecmp(buf, "splitv") == 0)
 207                 json_node->layout = L_SPLITV;
 208             else LOG("Unhandled \"layout\": %s\n", buf);
 209             free(buf);
 210         } else if (strcasecmp(last_key, "workspace_layout") == 0) {
 211             char *buf = NULL;
 212             sasprintf(&buf, "%.*s", (int)len, val);
 213             if (strcasecmp(buf, "default") == 0)
 214                 json_node->workspace_layout = L_DEFAULT;
 215             else if (strcasecmp(buf, "stacked") == 0)
 216                 json_node->workspace_layout = L_STACKED;
 217             else if (strcasecmp(buf, "tabbed") == 0)
 218                 json_node->workspace_layout = L_TABBED;
 219             else LOG("Unhandled \"workspace_layout\": %s\n", buf);
 220             free(buf);
 221         } else if (strcasecmp(last_key, "last_split_layout") == 0) {
 222             char *buf = NULL;
 223             sasprintf(&buf, "%.*s", (int)len, val);
 224             if (strcasecmp(buf, "splith") == 0)
 225                 json_node->last_split_layout = L_SPLITH;
 226             else if (strcasecmp(buf, "splitv") == 0)
 227                 json_node->last_split_layout = L_SPLITV;
 228             else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
 229             free(buf);
 230         } else if (strcasecmp(last_key, "mark") == 0) {
 231             char *buf = NULL;
 232             sasprintf(&buf, "%.*s", (int)len, val);
 233             json_node->mark = buf;
 234         } else if (strcasecmp(last_key, "floating") == 0) {
 235             char *buf = NULL;
 236             sasprintf(&buf, "%.*s", (int)len, val);
 237             if (strcasecmp(buf, "auto_off") == 0)
 238                 json_node->floating = FLOATING_AUTO_OFF;
 239             else if (strcasecmp(buf, "auto_on") == 0)
 240                 json_node->floating = FLOATING_AUTO_ON;
 241             else if (strcasecmp(buf, "user_off") == 0)
 242                 json_node->floating = FLOATING_USER_OFF;
 243             else if (strcasecmp(buf, "user_on") == 0)
 244                 json_node->floating = FLOATING_USER_ON;
 245             free(buf);
 246         } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
 247             char *buf = NULL;
 248             sasprintf(&buf, "%.*s", (int)len, val);
 249             if (strcasecmp(buf, "none") == 0)
 250                 json_node->scratchpad_state = SCRATCHPAD_NONE;
 251             else if (strcasecmp(buf, "fresh") == 0)
 252                 json_node->scratchpad_state = SCRATCHPAD_FRESH;
 253             else if (strcasecmp(buf, "changed") == 0)
 254                 json_node->scratchpad_state = SCRATCHPAD_CHANGED;
 255             free(buf);
 256         }
 257     }
 258     return 1;
 259 }
 260
 261 #if YAJL_MAJOR >= 2
 262 static int json_int(void *ctx, long long val) {
 263     LOG("int %lld for key %s\n", val, last_key);
 264 #else
 265 static int json_int(void *ctx, long val) {
 266     LOG("int %ld for key %s\n", val, last_key);
 267 #endif
 268     if (strcasecmp(last_key, "type") == 0)
 269         json_node->type = val;
 270
 271     if (strcasecmp(last_key, "fullscreen_mode") == 0)
 272         json_node->fullscreen_mode = val;
 273
 274     if (strcasecmp(last_key, "num") == 0)
 275         json_node->num = val;
 276
 277     if (strcasecmp(last_key, "current_border_width") == 0)
 278         json_node->current_border_width = val;
 279
 280     if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
 281         json_node->old_id = val;
 282
 283     if (parsing_focus) {
 284         struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
 285         focus_mapping->old_id = val;
 286         TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
 287     }
 288
 289     if (parsing_rect || parsing_window_rect || parsing_geometry) {
 290         Rect *r;
 291         if (parsing_rect)
 292             r = &(json_node->rect);
 293         else if (parsing_window_rect)
 294             r = &(json_node->window_rect);
 295         else r = &(json_node->geometry);
 296         if (strcasecmp(last_key, "x") == 0)
 297             r->x = val;
 298         else if (strcasecmp(last_key, "y") == 0)
 299             r->y = val;
 300         else if (strcasecmp(last_key, "width") == 0)
 301             r->width = val;
 302         else if (strcasecmp(last_key, "height") == 0)
 303             r->height = val;
 304         else printf("WARNING: unknown key %s in rect\n", last_key);
 305         printf("rect now: (%d, %d, %d, %d)\n",
 306                 r->x, r->y, r->width, r->height);
 307     }
 308     if (parsing_swallows) {
 309         if (strcasecmp(last_key, "id") == 0) {
 310             current_swallow->id = val;
 311         }
 312         if (strcasecmp(last_key, "dock") == 0) {
 313             current_swallow->dock = val;
 314         }
 315         if (strcasecmp(last_key, "insert_where") == 0) {
 316             current_swallow->insert_where = val;
 317         }
 318     }
 319
 320     return 1;
 321 }
 322
 323 static int json_bool(void *ctx, int val) {
 324     LOG("bool %d for key %s\n", val, last_key);
 325     if (strcasecmp(last_key, "focused") == 0 && val) {
 326         to_focus = json_node;
 327     }
 328
 329     if (parsing_swallows) {
 330         if (strcasecmp(last_key, "restart_mode") == 0)
 331             current_swallow->restart_mode = val;
 332     }
 333
 334     return 1;
 335 }
 336
 337 static int json_double(void *ctx, double val) {
 338     LOG("double %f for key %s\n", val, last_key);
 339     if (strcasecmp(last_key, "percent") == 0) {
 340         json_node->percent = val;
 341     }
 342     return 1;
 343 }
 344
 345 void tree_append_json(const char *filename) {
 346     /* TODO: percent of other windows are not correctly fixed at the moment */
 347     FILE *f;
 348     if ((f = fopen(filename, "r")) == NULL) {
 349         LOG("Cannot open file \"%s\"\n", filename);
 350         return;
 351     }
 352     struct stat stbuf;
 353     if (fstat(fileno(f), &stbuf) != 0) {
 354         LOG("Cannot fstat() the file\n");
 355         fclose(f);
 356         return;
 357     }
 358     char *buf = smalloc(stbuf.st_size);
 359     int n = fread(buf, 1, stbuf.st_size, f);
 360     if (n != stbuf.st_size) {
 361         LOG("File \"%s\" could not be read entirely, not loading.\n", filename);
 362         fclose(f);
 363         return;
 364     }
 365     LOG("read %d bytes\n", n);
 366     yajl_gen g;
 367     yajl_handle hand;
 368     yajl_callbacks callbacks;
 369     memset(&callbacks, '\0', sizeof(yajl_callbacks));
 370     callbacks.yajl_start_map = json_start_map;
 371     callbacks.yajl_end_map = json_end_map;
 372     callbacks.yajl_end_array = json_end_array;
 373     callbacks.yajl_string = json_string;
 374     callbacks.yajl_map_key = json_key;
 375     callbacks.yajl_integer = json_int;
 376     callbacks.yajl_double = json_double;
 377     callbacks.yajl_boolean = json_bool;
 378 #if YAJL_MAJOR >= 2
 379     g = yajl_gen_alloc(NULL);
 380     hand = yajl_alloc(&callbacks, NULL, (void*)g);
 381 #else
 382     g = yajl_gen_alloc(NULL, NULL);
 383     hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
 384 #endif
 385     yajl_status stat;
 386     json_node = focused;
 387     to_focus = NULL;
 388     parsing_rect = false;
 389     parsing_window_rect = false;
 390     parsing_geometry = false;
 391     setlocale(LC_NUMERIC, "C");
 392     stat = yajl_parse(hand, (const unsigned char*)buf, n);
 393     if (stat != yajl_status_ok)
 394     {
 395         unsigned char * str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
 396         fprintf(stderr, "%s\n", (const char *) str);
 397         yajl_free_error(hand, str);
 398     }
 399
 400     setlocale(LC_NUMERIC, "");
 401 #if YAJL_MAJOR >= 2
 402     yajl_complete_parse(hand);
 403 #else
 404     yajl_parse_complete(hand);
 405 #endif
 406
 407     fclose(f);
 408     if (to_focus)
 409         con_focus(to_focus);
 410 }