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         LOG("attaching\n");
  71         con_attach(json_node, json_node->parent, true);
  72         LOG("Creating window\n");
  73         x_con_init(json_node, json_node->depth);
  74         json_node = json_node->parent;
  75     }
  76     if (parsing_rect)
  77         parsing_rect = false;
  78     if (parsing_window_rect)
  79         parsing_window_rect = false;
  80     if (parsing_geometry)
  81         parsing_geometry = false;
  82     return 1;
  83 }
  84
  85 static int json_end_array(void *ctx) {
  86     LOG("end of array\n");
  87     parsing_swallows = false;
  88     if (parsing_focus) {
  89         /* Clear the list of focus mappings */
  90         struct focus_mapping *mapping;
  91         TAILQ_FOREACH_REVERSE(mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
  92             LOG("focus (reverse) %d\n", mapping->old_id);
  93             Con *con;
  94             TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
  95                 if (con->old_id != mapping->old_id)
  96                     continue;
  97                 LOG("got it! %p\n", con);
  98                 /* Move this entry to the top of the focus list. */
  99                 TAILQ_REMOVE(&(json_node->focus_head), con, focused);
 100                 TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
 101                 break;
 102             }
 103         }
 104         while (!TAILQ_EMPTY(&focus_mappings)) {
 105             mapping = TAILQ_FIRST(&focus_mappings);
 106             TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
 107             free(mapping);
 108         }
 109         parsing_focus = false;
 110     }
 111     return 1;
 112 }
 113
 114 #if YAJL_MAJOR < 2
 115 static int json_key(void *ctx, const unsigned char *val, unsigned int len) {
 116 #else
 117 static int json_key(void *ctx, const unsigned char *val, size_t len) {
 118 #endif
 119     LOG("key: %.*s\n", (int)len, val);
 120     FREE(last_key);
 121     last_key = scalloc((len+1) * sizeof(char));
 122     memcpy(last_key, val, len);
 123     if (strcasecmp(last_key, "swallows") == 0)
 124         parsing_swallows = true;
 125
 126     if (strcasecmp(last_key, "rect") == 0)
 127         parsing_rect = true;
 128
 129     if (strcasecmp(last_key, "window_rect") == 0)
 130         parsing_window_rect = true;
 131
 132     if (strcasecmp(last_key, "geometry") == 0)
 133         parsing_geometry = true;
 134
 135     if (strcasecmp(last_key, "focus") == 0)
 136         parsing_focus = true;
 137
 138     return 1;
 139 }
 140
 141 #if YAJL_MAJOR >= 2
 142 static int json_string(void *ctx, const unsigned char *val, size_t len) {
 143 #else
 144 static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
 145 #endif
 146     LOG("string: %.*s for key %s\n", (int)len, val, last_key);
 147     if (parsing_swallows) {
 148         /* TODO: the other swallowing keys */
 149         if (strcasecmp(last_key, "class") == 0) {
 150             current_swallow->class = scalloc((len+1) * sizeof(char));
 151             memcpy(current_swallow->class, val, len);
 152         }
 153         LOG("unhandled yet: swallow\n");
 154     } else {
 155         if (strcasecmp(last_key, "name") == 0) {
 156             json_node->name = scalloc((len+1) * sizeof(char));
 157             memcpy(json_node->name, val, len);
 158         } else if (strcasecmp(last_key, "sticky_group") == 0) {
 159             json_node->sticky_group = scalloc((len+1) * sizeof(char));
 160             memcpy(json_node->sticky_group, val, len);
 161             LOG("sticky_group of this container is %s\n", json_node->sticky_group);
 162         } else if (strcasecmp(last_key, "orientation") == 0) {
 163             /* Upgrade path from older versions of i3 (doing an inplace restart
 164              * to a newer version):
 165              * "orientation" is dumped before "layout". Therefore, we store
 166              * whether the orientation was horizontal or vertical in the
 167              * last_split_layout. When we then encounter layout == "default",
 168              * we will use the last_split_layout as layout instead. */
 169             char *buf = NULL;
 170             sasprintf(&buf, "%.*s", (int)len, val);
 171             if (strcasecmp(buf, "none") == 0 ||
 172                 strcasecmp(buf, "horizontal") == 0)
 173                 json_node->last_split_layout = L_SPLITH;
 174             else if (strcasecmp(buf, "vertical") == 0)
 175                 json_node->last_split_layout = L_SPLITV;
 176             else LOG("Unhandled orientation: %s\n", buf);
 177             free(buf);
 178         } else if (strcasecmp(last_key, "border") == 0) {
 179             char *buf = NULL;
 180             sasprintf(&buf, "%.*s", (int)len, val);
 181             if (strcasecmp(buf, "none") == 0)
 182                 json_node->border_style = BS_NONE;
 183             else if (strcasecmp(buf, "1pixel") == 0) {
 184                 json_node->border_style = BS_PIXEL;
 185                 json_node->current_border_width = 1;
 186             } else if (strcasecmp(buf, "pixel") == 0)
 187                 json_node->border_style = BS_PIXEL;
 188             else if (strcasecmp(buf, "normal") == 0)
 189                 json_node->border_style = BS_NORMAL;
 190             else LOG("Unhandled \"border\": %s\n", buf);
 191             free(buf);
 192         } else if (strcasecmp(last_key, "layout") == 0) {
 193             char *buf = NULL;
 194             sasprintf(&buf, "%.*s", (int)len, val);
 195             if (strcasecmp(buf, "default") == 0)
 196                 /* This set above when we read "orientation". */
 197                 json_node->layout = json_node->last_split_layout;
 198             else if (strcasecmp(buf, "stacked") == 0)
 199                 json_node->layout = L_STACKED;
 200             else if (strcasecmp(buf, "tabbed") == 0)
 201                 json_node->layout = L_TABBED;
 202             else if (strcasecmp(buf, "dockarea") == 0)
 203                 json_node->layout = L_DOCKAREA;
 204             else if (strcasecmp(buf, "output") == 0)
 205                 json_node->layout = L_OUTPUT;
 206             else if (strcasecmp(buf, "splith") == 0)
 207                 json_node->layout = L_SPLITH;
 208             else if (strcasecmp(buf, "splitv") == 0)
 209                 json_node->layout = L_SPLITV;
 210             else LOG("Unhandled \"layout\": %s\n", buf);
 211             free(buf);
 212         } else if (strcasecmp(last_key, "workspace_layout") == 0) {
 213             char *buf = NULL;
 214             sasprintf(&buf, "%.*s", (int)len, val);
 215             if (strcasecmp(buf, "default") == 0)
 216                 json_node->workspace_layout = L_DEFAULT;
 217             else if (strcasecmp(buf, "stacked") == 0)
 218                 json_node->workspace_layout = L_STACKED;
 219             else if (strcasecmp(buf, "tabbed") == 0)
 220                 json_node->workspace_layout = L_TABBED;
 221             else LOG("Unhandled \"workspace_layout\": %s\n", buf);
 222             free(buf);
 223         } else if (strcasecmp(last_key, "last_split_layout") == 0) {
 224             char *buf = NULL;
 225             sasprintf(&buf, "%.*s", (int)len, val);
 226             if (strcasecmp(buf, "splith") == 0)
 227                 json_node->last_split_layout = L_SPLITH;
 228             else if (strcasecmp(buf, "splitv") == 0)
 229                 json_node->last_split_layout = L_SPLITV;
 230             else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
 231             free(buf);
 232         } else if (strcasecmp(last_key, "mark") == 0) {
 233             char *buf = NULL;
 234             sasprintf(&buf, "%.*s", (int)len, val);
 235             json_node->mark = buf;
 236         } else if (strcasecmp(last_key, "floating") == 0) {
 237             char *buf = NULL;
 238             sasprintf(&buf, "%.*s", (int)len, val);
 239             if (strcasecmp(buf, "auto_off") == 0)
 240                 json_node->floating = FLOATING_AUTO_OFF;
 241             else if (strcasecmp(buf, "auto_on") == 0)
 242                 json_node->floating = FLOATING_AUTO_ON;
 243             else if (strcasecmp(buf, "user_off") == 0)
 244                 json_node->floating = FLOATING_USER_OFF;
 245             else if (strcasecmp(buf, "user_on") == 0)
 246                 json_node->floating = FLOATING_USER_ON;
 247             free(buf);
 248         } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
 249             char *buf = NULL;
 250             sasprintf(&buf, "%.*s", (int)len, val);
 251             if (strcasecmp(buf, "none") == 0)
 252                 json_node->scratchpad_state = SCRATCHPAD_NONE;
 253             else if (strcasecmp(buf, "fresh") == 0)
 254                 json_node->scratchpad_state = SCRATCHPAD_FRESH;
 255             else if (strcasecmp(buf, "changed") == 0)
 256                 json_node->scratchpad_state = SCRATCHPAD_CHANGED;
 257             free(buf);
 258         }
 259     }
 260     return 1;
 261 }
 262
 263 #if YAJL_MAJOR >= 2
 264 static int json_int(void *ctx, long long val) {
 265     LOG("int %lld for key %s\n", val, last_key);
 266 #else
 267 static int json_int(void *ctx, long val) {
 268     LOG("int %ld for key %s\n", val, last_key);
 269 #endif
 270     if (strcasecmp(last_key, "type") == 0)
 271         json_node->type = val;
 272
 273     if (strcasecmp(last_key, "fullscreen_mode") == 0)
 274         json_node->fullscreen_mode = val;
 275
 276     if (strcasecmp(last_key, "num") == 0)
 277         json_node->num = val;
 278
 279     if (strcasecmp(last_key, "current_border_width") == 0)
 280         json_node->current_border_width = val;
 281
 282     if (strcasecmp(last_key, "depth") == 0)
 283         json_node->depth = val;
 284
 285     if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
 286         json_node->old_id = val;
 287
 288     if (parsing_focus) {
 289         struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
 290         focus_mapping->old_id = val;
 291         TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
 292     }
 293
 294     if (parsing_rect || parsing_window_rect || parsing_geometry) {
 295         Rect *r;
 296         if (parsing_rect)
 297             r = &(json_node->rect);
 298         else if (parsing_window_rect)
 299             r = &(json_node->window_rect);
 300         else r = &(json_node->geometry);
 301         if (strcasecmp(last_key, "x") == 0)
 302             r->x = val;
 303         else if (strcasecmp(last_key, "y") == 0)
 304             r->y = val;
 305         else if (strcasecmp(last_key, "width") == 0)
 306             r->width = val;
 307         else if (strcasecmp(last_key, "height") == 0)
 308             r->height = val;
 309         else printf("WARNING: unknown key %s in rect\n", last_key);
 310         printf("rect now: (%d, %d, %d, %d)\n",
 311                 r->x, r->y, r->width, r->height);
 312     }
 313     if (parsing_swallows) {
 314         if (strcasecmp(last_key, "id") == 0) {
 315             current_swallow->id = val;
 316         }
 317         if (strcasecmp(last_key, "dock") == 0) {
 318             current_swallow->dock = val;
 319         }
 320         if (strcasecmp(last_key, "insert_where") == 0) {
 321             current_swallow->insert_where = val;
 322         }
 323     }
 324
 325     return 1;
 326 }
 327
 328 static int json_bool(void *ctx, int val) {
 329     LOG("bool %d for key %s\n", val, last_key);
 330     if (strcasecmp(last_key, "focused") == 0 && val) {
 331         to_focus = json_node;
 332     }
 333
 334     if (parsing_swallows) {
 335         if (strcasecmp(last_key, "restart_mode") == 0)
 336             current_swallow->restart_mode = val;
 337     }
 338
 339     return 1;
 340 }
 341
 342 static int json_double(void *ctx, double val) {
 343     LOG("double %f for key %s\n", val, last_key);
 344     if (strcasecmp(last_key, "percent") == 0) {
 345         json_node->percent = val;
 346     }
 347     return 1;
 348 }
 349
 350 void tree_append_json(const char *filename) {
 351     /* TODO: percent of other windows are not correctly fixed at the moment */
 352     FILE *f;
 353     if ((f = fopen(filename, "r")) == NULL) {
 354         LOG("Cannot open file \"%s\"\n", filename);
 355         return;
 356     }
 357     struct stat stbuf;
 358     if (fstat(fileno(f), &stbuf) != 0) {
 359         LOG("Cannot fstat() the file\n");
 360         fclose(f);
 361         return;
 362     }
 363     char *buf = smalloc(stbuf.st_size);
 364     int n = fread(buf, 1, stbuf.st_size, f);
 365     if (n != stbuf.st_size) {
 366         LOG("File \"%s\" could not be read entirely, not loading.\n", filename);
 367         fclose(f);
 368         return;
 369     }
 370     LOG("read %d bytes\n", n);
 371     yajl_gen g;
 372     yajl_handle hand;
 373     yajl_callbacks callbacks;
 374     memset(&callbacks, '\0', sizeof(yajl_callbacks));
 375     callbacks.yajl_start_map = json_start_map;
 376     callbacks.yajl_end_map = json_end_map;
 377     callbacks.yajl_end_array = json_end_array;
 378     callbacks.yajl_string = json_string;
 379     callbacks.yajl_map_key = json_key;
 380     callbacks.yajl_integer = json_int;
 381     callbacks.yajl_double = json_double;
 382     callbacks.yajl_boolean = json_bool;
 383 #if YAJL_MAJOR >= 2
 384     g = yajl_gen_alloc(NULL);
 385     hand = yajl_alloc(&callbacks, NULL, (void*)g);
 386 #else
 387     g = yajl_gen_alloc(NULL, NULL);
 388     hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
 389 #endif
 390     yajl_status stat;
 391     json_node = focused;
 392     to_focus = NULL;
 393     parsing_rect = false;
 394     parsing_window_rect = false;
 395     parsing_geometry = false;
 396     setlocale(LC_NUMERIC, "C");
 397     stat = yajl_parse(hand, (const unsigned char*)buf, n);
 398     if (stat != yajl_status_ok)
 399     {
 400         unsigned char * str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
 401         fprintf(stderr, "%s\n", (const char *) str);
 402         yajl_free_error(hand, str);
 403     }
 404
 405     setlocale(LC_NUMERIC, "");
 406 #if YAJL_MAJOR >= 2
 407     yajl_complete_parse(hand);
 408 #else
 409     yajl_parse_complete(hand);
 410 #endif
 411
 412     fclose(f);
 413     if (to_focus)
 414         con_focus(to_focus);
 415 }