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         /* TODO: the other swallowing keys */
 155         if (strcasecmp(last_key, "class") == 0) {
 156             current_swallow->class = scalloc((len+1) * sizeof(char));
 157             memcpy(current_swallow->class, val, len);
 158         }
 159         LOG("unhandled yet: swallow\n");
 160     } else {
 161         if (strcasecmp(last_key, "name") == 0) {
 162             json_node->name = scalloc((len+1) * sizeof(char));
 163             memcpy(json_node->name, val, len);
 164         } else if (strcasecmp(last_key, "sticky_group") == 0) {
 165             json_node->sticky_group = scalloc((len+1) * sizeof(char));
 166             memcpy(json_node->sticky_group, val, len);
 167             LOG("sticky_group of this container is %s\n", json_node->sticky_group);
 168         } else if (strcasecmp(last_key, "orientation") == 0) {
 169             /* Upgrade path from older versions of i3 (doing an inplace restart
 170              * to a newer version):
 171              * "orientation" is dumped before "layout". Therefore, we store
 172              * whether the orientation was horizontal or vertical in the
 173              * last_split_layout. When we then encounter layout == "default",
 174              * we will use the last_split_layout as layout instead. */
 175             char *buf = NULL;
 176             sasprintf(&buf, "%.*s", (int)len, val);
 177             if (strcasecmp(buf, "none") == 0 ||
 178                 strcasecmp(buf, "horizontal") == 0)
 179                 json_node->last_split_layout = L_SPLITH;
 180             else if (strcasecmp(buf, "vertical") == 0)
 181                 json_node->last_split_layout = L_SPLITV;
 182             else LOG("Unhandled orientation: %s\n", buf);
 183             free(buf);
 184         } else if (strcasecmp(last_key, "border") == 0) {
 185             char *buf = NULL;
 186             sasprintf(&buf, "%.*s", (int)len, val);
 187             if (strcasecmp(buf, "none") == 0)
 188                 json_node->border_style = BS_NONE;
 189             else if (strcasecmp(buf, "1pixel") == 0) {
 190                 json_node->border_style = BS_PIXEL;
 191                 json_node->current_border_width = 1;
 192             } else if (strcasecmp(buf, "pixel") == 0)
 193                 json_node->border_style = BS_PIXEL;
 194             else if (strcasecmp(buf, "normal") == 0)
 195                 json_node->border_style = BS_NORMAL;
 196             else LOG("Unhandled \"border\": %s\n", buf);
 197             free(buf);
 198         } else if (strcasecmp(last_key, "layout") == 0) {
 199             char *buf = NULL;
 200             sasprintf(&buf, "%.*s", (int)len, val);
 201             if (strcasecmp(buf, "default") == 0)
 202                 /* This set above when we read "orientation". */
 203                 json_node->layout = json_node->last_split_layout;
 204             else if (strcasecmp(buf, "stacked") == 0)
 205                 json_node->layout = L_STACKED;
 206             else if (strcasecmp(buf, "tabbed") == 0)
 207                 json_node->layout = L_TABBED;
 208             else if (strcasecmp(buf, "dockarea") == 0)
 209                 json_node->layout = L_DOCKAREA;
 210             else if (strcasecmp(buf, "output") == 0)
 211                 json_node->layout = L_OUTPUT;
 212             else if (strcasecmp(buf, "splith") == 0)
 213                 json_node->layout = L_SPLITH;
 214             else if (strcasecmp(buf, "splitv") == 0)
 215                 json_node->layout = L_SPLITV;
 216             else LOG("Unhandled \"layout\": %s\n", buf);
 217             free(buf);
 218         } else if (strcasecmp(last_key, "workspace_layout") == 0) {
 219             char *buf = NULL;
 220             sasprintf(&buf, "%.*s", (int)len, val);
 221             if (strcasecmp(buf, "default") == 0)
 222                 json_node->workspace_layout = L_DEFAULT;
 223             else if (strcasecmp(buf, "stacked") == 0)
 224                 json_node->workspace_layout = L_STACKED;
 225             else if (strcasecmp(buf, "tabbed") == 0)
 226                 json_node->workspace_layout = L_TABBED;
 227             else LOG("Unhandled \"workspace_layout\": %s\n", buf);
 228             free(buf);
 229         } else if (strcasecmp(last_key, "last_split_layout") == 0) {
 230             char *buf = NULL;
 231             sasprintf(&buf, "%.*s", (int)len, val);
 232             if (strcasecmp(buf, "splith") == 0)
 233                 json_node->last_split_layout = L_SPLITH;
 234             else if (strcasecmp(buf, "splitv") == 0)
 235                 json_node->last_split_layout = L_SPLITV;
 236             else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
 237             free(buf);
 238         } else if (strcasecmp(last_key, "mark") == 0) {
 239             char *buf = NULL;
 240             sasprintf(&buf, "%.*s", (int)len, val);
 241             json_node->mark = buf;
 242         } else if (strcasecmp(last_key, "floating") == 0) {
 243             char *buf = NULL;
 244             sasprintf(&buf, "%.*s", (int)len, val);
 245             if (strcasecmp(buf, "auto_off") == 0)
 246                 json_node->floating = FLOATING_AUTO_OFF;
 247             else if (strcasecmp(buf, "auto_on") == 0)
 248                 json_node->floating = FLOATING_AUTO_ON;
 249             else if (strcasecmp(buf, "user_off") == 0)
 250                 json_node->floating = FLOATING_USER_OFF;
 251             else if (strcasecmp(buf, "user_on") == 0)
 252                 json_node->floating = FLOATING_USER_ON;
 253             free(buf);
 254         } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
 255             char *buf = NULL;
 256             sasprintf(&buf, "%.*s", (int)len, val);
 257             if (strcasecmp(buf, "none") == 0)
 258                 json_node->scratchpad_state = SCRATCHPAD_NONE;
 259             else if (strcasecmp(buf, "fresh") == 0)
 260                 json_node->scratchpad_state = SCRATCHPAD_FRESH;
 261             else if (strcasecmp(buf, "changed") == 0)
 262                 json_node->scratchpad_state = SCRATCHPAD_CHANGED;
 263             free(buf);
 264         }
 265     }
 266     return 1;
 267 }
 268
 269 #if YAJL_MAJOR >= 2
 270 static int json_int(void *ctx, long long val) {
 271     LOG("int %lld for key %s\n", val, last_key);
 272 #else
 273 static int json_int(void *ctx, long val) {
 274     LOG("int %ld for key %s\n", val, last_key);
 275 #endif
 276     if (strcasecmp(last_key, "type") == 0)
 277         json_node->type = val;
 278
 279     if (strcasecmp(last_key, "fullscreen_mode") == 0)
 280         json_node->fullscreen_mode = val;
 281
 282     if (strcasecmp(last_key, "num") == 0)
 283         json_node->num = val;
 284
 285     if (strcasecmp(last_key, "current_border_width") == 0)
 286         json_node->current_border_width = val;
 287
 288     if (strcasecmp(last_key, "depth") == 0)
 289         json_node->depth = val;
 290
 291     if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
 292         json_node->old_id = val;
 293
 294     if (parsing_focus) {
 295         struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
 296         focus_mapping->old_id = val;
 297         TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
 298     }
 299
 300     if (parsing_rect || parsing_window_rect || parsing_geometry) {
 301         Rect *r;
 302         if (parsing_rect)
 303             r = &(json_node->rect);
 304         else if (parsing_window_rect)
 305             r = &(json_node->window_rect);
 306         else r = &(json_node->geometry);
 307         if (strcasecmp(last_key, "x") == 0)
 308             r->x = val;
 309         else if (strcasecmp(last_key, "y") == 0)
 310             r->y = val;
 311         else if (strcasecmp(last_key, "width") == 0)
 312             r->width = val;
 313         else if (strcasecmp(last_key, "height") == 0)
 314             r->height = val;
 315         else printf("WARNING: unknown key %s in rect\n", last_key);
 316         printf("rect now: (%d, %d, %d, %d)\n",
 317                 r->x, r->y, r->width, r->height);
 318     }
 319     if (parsing_swallows) {
 320         if (strcasecmp(last_key, "id") == 0) {
 321             current_swallow->id = val;
 322         }
 323         if (strcasecmp(last_key, "dock") == 0) {
 324             current_swallow->dock = val;
 325         }
 326         if (strcasecmp(last_key, "insert_where") == 0) {
 327             current_swallow->insert_where = val;
 328         }
 329     }
 330
 331     return 1;
 332 }
 333
 334 static int json_bool(void *ctx, int val) {
 335     LOG("bool %d for key %s\n", val, last_key);
 336     if (strcasecmp(last_key, "focused") == 0 && val) {
 337         to_focus = json_node;
 338     }
 339
 340     if (parsing_swallows) {
 341         if (strcasecmp(last_key, "restart_mode") == 0)
 342             current_swallow->restart_mode = val;
 343     }
 344
 345     return 1;
 346 }
 347
 348 static int json_double(void *ctx, double val) {
 349     LOG("double %f for key %s\n", val, last_key);
 350     if (strcasecmp(last_key, "percent") == 0) {
 351         json_node->percent = val;
 352     }
 353     return 1;
 354 }
 355
 356 void tree_append_json(const char *filename) {
 357     /* TODO: percent of other windows are not correctly fixed at the moment */
 358     FILE *f;
 359     if ((f = fopen(filename, "r")) == NULL) {
 360         LOG("Cannot open file \"%s\"\n", filename);
 361         return;
 362     }
 363     struct stat stbuf;
 364     if (fstat(fileno(f), &stbuf) != 0) {
 365         LOG("Cannot fstat() the file\n");
 366         fclose(f);
 367         return;
 368     }
 369     char *buf = smalloc(stbuf.st_size);
 370     int n = fread(buf, 1, stbuf.st_size, f);
 371     if (n != stbuf.st_size) {
 372         LOG("File \"%s\" could not be read entirely, not loading.\n", filename);
 373         fclose(f);
 374         return;
 375     }
 376     LOG("read %d bytes\n", n);
 377     yajl_gen g;
 378     yajl_handle hand;
 379     yajl_callbacks callbacks;
 380     memset(&callbacks, '\0', sizeof(yajl_callbacks));
 381     callbacks.yajl_start_map = json_start_map;
 382     callbacks.yajl_end_map = json_end_map;
 383     callbacks.yajl_end_array = json_end_array;
 384     callbacks.yajl_string = json_string;
 385     callbacks.yajl_map_key = json_key;
 386     callbacks.yajl_integer = json_int;
 387     callbacks.yajl_double = json_double;
 388     callbacks.yajl_boolean = json_bool;
 389 #if YAJL_MAJOR >= 2
 390     g = yajl_gen_alloc(NULL);
 391     hand = yajl_alloc(&callbacks, NULL, (void*)g);
 392 #else
 393     g = yajl_gen_alloc(NULL, NULL);
 394     hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
 395 #endif
 396     yajl_status stat;
 397     json_node = focused;
 398     to_focus = NULL;
 399     parsing_rect = false;
 400     parsing_window_rect = false;
 401     parsing_geometry = false;
 402     setlocale(LC_NUMERIC, "C");
 403     stat = yajl_parse(hand, (const unsigned char*)buf, n);
 404     if (stat != yajl_status_ok)
 405     {
 406         unsigned char * str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
 407         fprintf(stderr, "%s\n", (const char *) str);
 408         yajl_free_error(hand, str);
 409     }
 410
 411     setlocale(LC_NUMERIC, "");
 412 #if YAJL_MAJOR >= 2
 413     yajl_complete_parse(hand);
 414 #else
 415     yajl_parse_complete(hand);
 416 #endif
 417
 418     fclose(f);
 419     if (to_focus)
 420         con_focus(to_focus);
 421 }