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

   1 /*
   2  * vim:ts=4:sw=4:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
   6  *
   7  * load_layout.c: Restore (parts of) the layout, for example after an inplace
   8  *                restart.
   9  *
  10  */
  11 #include "all.h"
  12
  13 #include <yajl/yajl_common.h>
  14 #include <yajl/yajl_gen.h>
  15 #include <yajl/yajl_parse.h>
  16 #include <yajl/yajl_version.h>
  17
  18 /* TODO: refactor the whole parsing thing */
  19
  20 static char *last_key;
  21 static Con *json_node;
  22 static Con *to_focus;
  23 static bool parsing_swallows;
  24 static bool parsing_rect;
  25 static bool parsing_window_rect;
  26 static bool parsing_geometry;
  27 static bool parsing_focus;
  28 struct Match *current_swallow;
  29
  30 /* This list is used for reordering the focus stack after parsing the 'focus'
  31  * array. */
  32 struct focus_mapping {
  33     int old_id;
  34     TAILQ_ENTRY(focus_mapping) focus_mappings;
  35 };
  36
  37 static TAILQ_HEAD(focus_mappings_head, focus_mapping) focus_mappings =
  38   TAILQ_HEAD_INITIALIZER(focus_mappings);
  39
  40 static int json_start_map(void *ctx) {
  41     LOG("start of map, last_key = %s\n", last_key);
  42     if (parsing_swallows) {
  43         LOG("creating new swallow\n");
  44         current_swallow = smalloc(sizeof(Match));
  45         match_init(current_swallow);
  46         TAILQ_INSERT_TAIL(&(json_node->swallow_head), current_swallow, matches);
  47     } else {
  48         if (!parsing_rect && !parsing_window_rect && !parsing_geometry) {
  49             if (last_key && strcasecmp(last_key, "floating_nodes") == 0) {
  50                 DLOG("New floating_node\n");
  51                 Con *ws = con_get_workspace(json_node);
  52                 json_node = con_new(NULL, NULL);
  53                 json_node->parent = ws;
  54                 DLOG("Parent is workspace = %p\n", ws);
  55             } else {
  56                 Con *parent = json_node;
  57                 json_node = con_new(NULL, NULL);
  58                 json_node->parent = parent;
  59             }
  60         }
  61     }
  62     return 1;
  63 }
  64
  65 static int json_end_map(void *ctx) {
  66     LOG("end of map\n");
  67     if (!parsing_swallows && !parsing_rect && !parsing_window_rect && !parsing_geometry) {
  68         LOG("attaching\n");
  69         con_attach(json_node, json_node->parent, true);
  70         json_node = json_node->parent;
  71     }
  72     if (parsing_rect)
  73         parsing_rect = false;
  74     if (parsing_window_rect)
  75         parsing_window_rect = false;
  76     if (parsing_geometry)
  77         parsing_geometry = false;
  78     return 1;
  79 }
  80
  81 static int json_end_array(void *ctx) {
  82     LOG("end of array\n");
  83     parsing_swallows = false;
  84     if (parsing_focus) {
  85         /* Clear the list of focus mappings */
  86         struct focus_mapping *mapping;
  87         TAILQ_FOREACH_REVERSE(mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
  88             LOG("focus (reverse) %d\n", mapping->old_id);
  89             Con *con;
  90             TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
  91                 if (con->old_id != mapping->old_id)
  92                     continue;
  93                 LOG("got it! %p\n", con);
  94                 /* Move this entry to the top of the focus list. */
  95                 TAILQ_REMOVE(&(json_node->focus_head), con, focused);
  96                 TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
  97                 break;
  98             }
  99         }
 100         while (!TAILQ_EMPTY(&focus_mappings)) {
 101             mapping = TAILQ_FIRST(&focus_mappings);
 102             TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
 103             free(mapping);
 104         }
 105         parsing_focus = false;
 106     }
 107     return 1;
 108 }
 109
 110 #if YAJL_MAJOR < 2
 111 static int json_key(void *ctx, const unsigned char *val, unsigned int len) {
 112 #else
 113 static int json_key(void *ctx, const unsigned char *val, size_t len) {
 114 #endif
 115     LOG("key: %.*s\n", (int)len, val);
 116     FREE(last_key);
 117     last_key = scalloc((len+1) * sizeof(char));
 118     memcpy(last_key, val, len);
 119     if (strcasecmp(last_key, "swallows") == 0)
 120         parsing_swallows = true;
 121
 122     if (strcasecmp(last_key, "rect") == 0)
 123         parsing_rect = true;
 124
 125     if (strcasecmp(last_key, "window_rect") == 0)
 126         parsing_window_rect = true;
 127
 128     if (strcasecmp(last_key, "geometry") == 0)
 129         parsing_geometry = true;
 130
 131     if (strcasecmp(last_key, "focus") == 0)
 132         parsing_focus = true;
 133
 134     return 1;
 135 }
 136
 137 #if YAJL_MAJOR >= 2
 138 static int json_string(void *ctx, const unsigned char *val, size_t len) {
 139 #else
 140 static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
 141 #endif
 142     LOG("string: %.*s for key %s\n", len, val, last_key);
 143     if (parsing_swallows) {
 144         /* TODO: the other swallowing keys */
 145         if (strcasecmp(last_key, "class") == 0) {
 146             current_swallow->class = scalloc((len+1) * sizeof(char));
 147             memcpy(current_swallow->class, val, len);
 148         }
 149         LOG("unhandled yet: swallow\n");
 150     } else {
 151         if (strcasecmp(last_key, "name") == 0) {
 152             json_node->name = scalloc((len+1) * sizeof(char));
 153             memcpy(json_node->name, val, len);
 154         } else if (strcasecmp(last_key, "sticky_group") == 0) {
 155             json_node->sticky_group = scalloc((len+1) * sizeof(char));
 156             memcpy(json_node->sticky_group, val, len);
 157             LOG("sticky_group of this container is %s\n", json_node->sticky_group);
 158         } else if (strcasecmp(last_key, "orientation") == 0) {
 159             /* Upgrade path from older versions of i3 (doing an inplace restart
 160              * to a newer version):
 161              * "orientation" is dumped before "layout". Therefore, we store
 162              * whether the orientation was horizontal or vertical in the
 163              * last_split_layout. When we then encounter layout == "default",
 164              * we will use the last_split_layout as layout instead. */
 165             char *buf = NULL;
 166             sasprintf(&buf, "%.*s", (int)len, val);
 167             if (strcasecmp(buf, "none") == 0 ||
 168                 strcasecmp(buf, "horizontal") == 0)
 169                 json_node->last_split_layout = L_SPLITH;
 170             else if (strcasecmp(buf, "vertical") == 0)
 171                 json_node->last_split_layout = L_SPLITV;
 172             else LOG("Unhandled orientation: %s\n", buf);
 173
 174             /* What used to be an implicit check whether orientation !=
 175              * NO_ORIENTATION is now a proper separate flag. */
 176             if (strcasecmp(buf, "none") != 0)
 177                 json_node->split = true;
 178             free(buf);
 179         } else if (strcasecmp(last_key, "border") == 0) {
 180             char *buf = NULL;
 181             sasprintf(&buf, "%.*s", (int)len, val);
 182             if (strcasecmp(buf, "none") == 0)
 183                 json_node->border_style = BS_NONE;
 184             else if (strcasecmp(buf, "1pixel") == 0)
 185                 json_node->border_style = BS_1PIXEL;
 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                 /* Necessary for migrating from older versions of i3. */
 203                 json_node->split = false;
 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, "last_split_layout") == 0) {
 213             char *buf = NULL;
 214             sasprintf(&buf, "%.*s", (int)len, val);
 215             if (strcasecmp(buf, "splith") == 0)
 216                 json_node->last_split_layout = L_SPLITH;
 217             else if (strcasecmp(buf, "splitv") == 0)
 218                 json_node->last_split_layout = L_SPLITV;
 219             else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
 220             free(buf);
 221         } else if (strcasecmp(last_key, "mark") == 0) {
 222             char *buf = NULL;
 223             sasprintf(&buf, "%.*s", (int)len, val);
 224             json_node->mark = buf;
 225         } else if (strcasecmp(last_key, "floating") == 0) {
 226             char *buf = NULL;
 227             sasprintf(&buf, "%.*s", (int)len, val);
 228             if (strcasecmp(buf, "auto_off") == 0)
 229                 json_node->floating = FLOATING_AUTO_OFF;
 230             else if (strcasecmp(buf, "auto_on") == 0)
 231                 json_node->floating = FLOATING_AUTO_ON;
 232             else if (strcasecmp(buf, "user_off") == 0)
 233                 json_node->floating = FLOATING_USER_OFF;
 234             else if (strcasecmp(buf, "user_on") == 0)
 235                 json_node->floating = FLOATING_USER_ON;
 236             free(buf);
 237         } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
 238             char *buf = NULL;
 239             sasprintf(&buf, "%.*s", (int)len, val);
 240             if (strcasecmp(buf, "none") == 0)
 241                 json_node->scratchpad_state = SCRATCHPAD_NONE;
 242             else if (strcasecmp(buf, "fresh") == 0)
 243                 json_node->scratchpad_state = SCRATCHPAD_FRESH;
 244             else if (strcasecmp(buf, "changed") == 0)
 245                 json_node->scratchpad_state = SCRATCHPAD_CHANGED;
 246             free(buf);
 247         }
 248     }
 249     return 1;
 250 }
 251
 252 #if YAJL_MAJOR >= 2
 253 static int json_int(void *ctx, long long val) {
 254     LOG("int %lld for key %s\n", val, last_key);
 255 #else
 256 static int json_int(void *ctx, long val) {
 257     LOG("int %ld for key %s\n", val, last_key);
 258 #endif
 259     if (strcasecmp(last_key, "type") == 0)
 260         json_node->type = val;
 261
 262     if (strcasecmp(last_key, "fullscreen_mode") == 0)
 263         json_node->fullscreen_mode = val;
 264
 265     if (strcasecmp(last_key, "num") == 0)
 266         json_node->num = val;
 267
 268     if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
 269         json_node->old_id = val;
 270
 271     if (parsing_focus) {
 272         struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
 273         focus_mapping->old_id = val;
 274         TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
 275     }
 276
 277     if (parsing_rect || parsing_window_rect || parsing_geometry) {
 278         Rect *r;
 279         if (parsing_rect)
 280             r = &(json_node->rect);
 281         else if (parsing_window_rect)
 282             r = &(json_node->window_rect);
 283         else r = &(json_node->geometry);
 284         if (strcasecmp(last_key, "x") == 0)
 285             r->x = val;
 286         else if (strcasecmp(last_key, "y") == 0)
 287             r->y = val;
 288         else if (strcasecmp(last_key, "width") == 0)
 289             r->width = val;
 290         else if (strcasecmp(last_key, "height") == 0)
 291             r->height = val;
 292         else printf("WARNING: unknown key %s in rect\n", last_key);
 293         printf("rect now: (%d, %d, %d, %d)\n",
 294                 r->x, r->y, r->width, r->height);
 295     }
 296     if (parsing_swallows) {
 297         if (strcasecmp(last_key, "id") == 0) {
 298             current_swallow->id = val;
 299         }
 300         if (strcasecmp(last_key, "dock") == 0) {
 301             current_swallow->dock = val;
 302         }
 303         if (strcasecmp(last_key, "insert_where") == 0) {
 304             current_swallow->insert_where = val;
 305         }
 306     }
 307
 308     return 1;
 309 }
 310
 311 static int json_bool(void *ctx, int val) {
 312     LOG("bool %d for key %s\n", val, last_key);
 313     if (strcasecmp(last_key, "focused") == 0 && val) {
 314         to_focus = json_node;
 315     }
 316
 317     if (strcasecmp(last_key, "split") == 0)
 318         json_node->split = val;
 319
 320     if (parsing_swallows) {
 321         if (strcasecmp(last_key, "restart_mode") == 0)
 322             current_swallow->restart_mode = val;
 323     }
 324
 325     return 1;
 326 }
 327
 328 static int json_double(void *ctx, double val) {
 329     LOG("double %f for key %s\n", val, last_key);
 330     if (strcasecmp(last_key, "percent") == 0) {
 331         json_node->percent = val;
 332     }
 333     return 1;
 334 }
 335
 336 void tree_append_json(const char *filename) {
 337     /* TODO: percent of other windows are not correctly fixed at the moment */
 338     FILE *f;
 339     if ((f = fopen(filename, "r")) == NULL) {
 340         LOG("Cannot open file\n");
 341         return;
 342     }
 343     char *buf = malloc(65535); /* TODO */
 344     int n = fread(buf, 1, 65535, f);
 345     LOG("read %d bytes\n", n);
 346     yajl_gen g;
 347     yajl_handle hand;
 348     yajl_callbacks callbacks;
 349     memset(&callbacks, '\0', sizeof(yajl_callbacks));
 350     callbacks.yajl_start_map = json_start_map;
 351     callbacks.yajl_end_map = json_end_map;
 352     callbacks.yajl_end_array = json_end_array;
 353     callbacks.yajl_string = json_string;
 354     callbacks.yajl_map_key = json_key;
 355     callbacks.yajl_integer = json_int;
 356     callbacks.yajl_double = json_double;
 357     callbacks.yajl_boolean = json_bool;
 358 #if YAJL_MAJOR >= 2
 359     g = yajl_gen_alloc(NULL);
 360     hand = yajl_alloc(&callbacks, NULL, (void*)g);
 361 #else
 362     g = yajl_gen_alloc(NULL, NULL);
 363     hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
 364 #endif
 365     yajl_status stat;
 366     json_node = focused;
 367     to_focus = NULL;
 368     parsing_rect = false;
 369     parsing_window_rect = false;
 370     parsing_geometry = false;
 371     setlocale(LC_NUMERIC, "C");
 372     stat = yajl_parse(hand, (const unsigned char*)buf, n);
 373     if (stat != yajl_status_ok)
 374     {
 375         unsigned char * str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
 376         fprintf(stderr, "%s\n", (const char *) str);
 377         yajl_free_error(hand, str);
 378     }
 379
 380     setlocale(LC_NUMERIC, "");
 381 #if YAJL_MAJOR >= 2
 382     yajl_complete_parse(hand);
 383 #else
 384     yajl_parse_complete(hand);
 385 #endif
 386
 387     fclose(f);
 388     if (to_focus)
 389         con_focus(to_focus);
 390 }