2 #define I3__FILE__ "load_layout.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
9 * load_layout.c: Restore (parts of) the layout, for example after an inplace
15 #include <yajl/yajl_common.h>
16 #include <yajl/yajl_gen.h>
17 #include <yajl/yajl_parse.h>
18 #include <yajl/yajl_version.h>
20 /* TODO: refactor the whole parsing thing */
22 static char *last_key;
23 static Con *json_node;
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;
32 /* This list is used for reordering the focus stack after parsing the 'focus'
34 struct focus_mapping {
36 TAILQ_ENTRY(focus_mapping) focus_mappings;
39 static TAILQ_HEAD(focus_mappings_head, focus_mapping) focus_mappings =
40 TAILQ_HEAD_INITIALIZER(focus_mappings);
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);
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);
58 Con *parent = json_node;
59 json_node = con_new_skeleton(NULL, NULL);
60 json_node->parent = parent;
67 static int json_end_map(void *ctx) {
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;
76 /* Sanity check: swallow criteria don’t make any sense on a split
78 if (con_is_split(json_node) > 0 && !TAILQ_EMPTY(&(json_node->swallow_head))) {
79 DLOG("sanity check: removing swallows specification from split container\n");
80 while (!TAILQ_EMPTY(&(json_node->swallow_head))) {
81 Match *match = TAILQ_FIRST(&(json_node->swallow_head));
82 TAILQ_REMOVE(&(json_node->swallow_head), match, matches);
88 con_attach(json_node, json_node->parent, true);
89 LOG("Creating window\n");
90 x_con_init(json_node, json_node->depth);
91 json_node = json_node->parent;
95 if (parsing_window_rect)
96 parsing_window_rect = false;
98 parsing_geometry = false;
102 static int json_end_array(void *ctx) {
103 LOG("end of array\n");
104 if (!parsing_swallows && !parsing_focus) {
105 con_fix_percent(json_node);
107 if (parsing_swallows) {
108 parsing_swallows = false;
111 /* Clear the list of focus mappings */
112 struct focus_mapping *mapping;
113 TAILQ_FOREACH_REVERSE(mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
114 LOG("focus (reverse) %d\n", mapping->old_id);
116 TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
117 if (con->old_id != mapping->old_id)
119 LOG("got it! %p\n", con);
120 /* Move this entry to the top of the focus list. */
121 TAILQ_REMOVE(&(json_node->focus_head), con, focused);
122 TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
126 while (!TAILQ_EMPTY(&focus_mappings)) {
127 mapping = TAILQ_FIRST(&focus_mappings);
128 TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
131 parsing_focus = false;
137 static int json_key(void *ctx, const unsigned char *val, unsigned int len) {
139 static int json_key(void *ctx, const unsigned char *val, size_t len) {
141 LOG("key: %.*s\n", (int)len, val);
143 last_key = scalloc((len+1) * sizeof(char));
144 memcpy(last_key, val, len);
145 if (strcasecmp(last_key, "swallows") == 0)
146 parsing_swallows = true;
148 if (strcasecmp(last_key, "rect") == 0)
151 if (strcasecmp(last_key, "window_rect") == 0)
152 parsing_window_rect = true;
154 if (strcasecmp(last_key, "geometry") == 0)
155 parsing_geometry = true;
157 if (strcasecmp(last_key, "focus") == 0)
158 parsing_focus = true;
164 static int json_string(void *ctx, const unsigned char *val, size_t len) {
166 static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
168 LOG("string: %.*s for key %s\n", (int)len, val, last_key);
169 if (parsing_swallows) {
171 sasprintf(&sval, "%.*s", len, val);
172 if (strcasecmp(last_key, "class") == 0) {
173 current_swallow->class = regex_new(sval);
174 } else if (strcasecmp(last_key, "instance") == 0) {
175 current_swallow->instance = regex_new(sval);
176 } else if (strcasecmp(last_key, "window_role") == 0) {
177 current_swallow->window_role = regex_new(sval);
178 } else if (strcasecmp(last_key, "title") == 0) {
179 current_swallow->title = regex_new(sval);
181 ELOG("swallow key %s unknown\n", last_key);
185 if (strcasecmp(last_key, "name") == 0) {
186 json_node->name = scalloc((len+1) * sizeof(char));
187 memcpy(json_node->name, val, len);
188 } else if (strcasecmp(last_key, "sticky_group") == 0) {
189 json_node->sticky_group = scalloc((len+1) * sizeof(char));
190 memcpy(json_node->sticky_group, val, len);
191 LOG("sticky_group of this container is %s\n", json_node->sticky_group);
192 } else if (strcasecmp(last_key, "orientation") == 0) {
193 /* Upgrade path from older versions of i3 (doing an inplace restart
194 * to a newer version):
195 * "orientation" is dumped before "layout". Therefore, we store
196 * whether the orientation was horizontal or vertical in the
197 * last_split_layout. When we then encounter layout == "default",
198 * we will use the last_split_layout as layout instead. */
200 sasprintf(&buf, "%.*s", (int)len, val);
201 if (strcasecmp(buf, "none") == 0 ||
202 strcasecmp(buf, "horizontal") == 0)
203 json_node->last_split_layout = L_SPLITH;
204 else if (strcasecmp(buf, "vertical") == 0)
205 json_node->last_split_layout = L_SPLITV;
206 else LOG("Unhandled orientation: %s\n", buf);
208 } else if (strcasecmp(last_key, "border") == 0) {
210 sasprintf(&buf, "%.*s", (int)len, val);
211 if (strcasecmp(buf, "none") == 0)
212 json_node->border_style = BS_NONE;
213 else if (strcasecmp(buf, "1pixel") == 0) {
214 json_node->border_style = BS_PIXEL;
215 json_node->current_border_width = 1;
216 } else if (strcasecmp(buf, "pixel") == 0)
217 json_node->border_style = BS_PIXEL;
218 else if (strcasecmp(buf, "normal") == 0)
219 json_node->border_style = BS_NORMAL;
220 else LOG("Unhandled \"border\": %s\n", buf);
222 } else if (strcasecmp(last_key, "type") == 0) {
224 sasprintf(&buf, "%.*s", (int)len, val);
225 if (strcasecmp(buf, "root") == 0)
226 json_node->type = CT_ROOT;
227 else if (strcasecmp(buf, "output") == 0)
228 json_node->type = CT_OUTPUT;
229 else if (strcasecmp(buf, "con") == 0)
230 json_node->type = CT_CON;
231 else if (strcasecmp(buf, "floating_con") == 0)
232 json_node->type = CT_FLOATING_CON;
233 else if (strcasecmp(buf, "workspace") == 0)
234 json_node->type = CT_WORKSPACE;
235 else if (strcasecmp(buf, "dockarea") == 0)
236 json_node->type = CT_DOCKAREA;
237 else LOG("Unhandled \"type\": %s\n", buf);
239 } else if (strcasecmp(last_key, "layout") == 0) {
241 sasprintf(&buf, "%.*s", (int)len, val);
242 if (strcasecmp(buf, "default") == 0)
243 /* This set above when we read "orientation". */
244 json_node->layout = json_node->last_split_layout;
245 else if (strcasecmp(buf, "stacked") == 0)
246 json_node->layout = L_STACKED;
247 else if (strcasecmp(buf, "tabbed") == 0)
248 json_node->layout = L_TABBED;
249 else if (strcasecmp(buf, "dockarea") == 0)
250 json_node->layout = L_DOCKAREA;
251 else if (strcasecmp(buf, "output") == 0)
252 json_node->layout = L_OUTPUT;
253 else if (strcasecmp(buf, "splith") == 0)
254 json_node->layout = L_SPLITH;
255 else if (strcasecmp(buf, "splitv") == 0)
256 json_node->layout = L_SPLITV;
257 else LOG("Unhandled \"layout\": %s\n", buf);
259 } else if (strcasecmp(last_key, "workspace_layout") == 0) {
261 sasprintf(&buf, "%.*s", (int)len, val);
262 if (strcasecmp(buf, "default") == 0)
263 json_node->workspace_layout = L_DEFAULT;
264 else if (strcasecmp(buf, "stacked") == 0)
265 json_node->workspace_layout = L_STACKED;
266 else if (strcasecmp(buf, "tabbed") == 0)
267 json_node->workspace_layout = L_TABBED;
268 else LOG("Unhandled \"workspace_layout\": %s\n", buf);
270 } else if (strcasecmp(last_key, "last_split_layout") == 0) {
272 sasprintf(&buf, "%.*s", (int)len, val);
273 if (strcasecmp(buf, "splith") == 0)
274 json_node->last_split_layout = L_SPLITH;
275 else if (strcasecmp(buf, "splitv") == 0)
276 json_node->last_split_layout = L_SPLITV;
277 else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
279 } else if (strcasecmp(last_key, "mark") == 0) {
281 sasprintf(&buf, "%.*s", (int)len, val);
282 json_node->mark = buf;
283 } else if (strcasecmp(last_key, "floating") == 0) {
285 sasprintf(&buf, "%.*s", (int)len, val);
286 if (strcasecmp(buf, "auto_off") == 0)
287 json_node->floating = FLOATING_AUTO_OFF;
288 else if (strcasecmp(buf, "auto_on") == 0)
289 json_node->floating = FLOATING_AUTO_ON;
290 else if (strcasecmp(buf, "user_off") == 0)
291 json_node->floating = FLOATING_USER_OFF;
292 else if (strcasecmp(buf, "user_on") == 0)
293 json_node->floating = FLOATING_USER_ON;
295 } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
297 sasprintf(&buf, "%.*s", (int)len, val);
298 if (strcasecmp(buf, "none") == 0)
299 json_node->scratchpad_state = SCRATCHPAD_NONE;
300 else if (strcasecmp(buf, "fresh") == 0)
301 json_node->scratchpad_state = SCRATCHPAD_FRESH;
302 else if (strcasecmp(buf, "changed") == 0)
303 json_node->scratchpad_state = SCRATCHPAD_CHANGED;
311 static int json_int(void *ctx, long long val) {
312 LOG("int %lld for key %s\n", val, last_key);
314 static int json_int(void *ctx, long val) {
315 LOG("int %ld for key %s\n", val, last_key);
317 /* For backwards compatibility with i3 < 4.8 */
318 if (strcasecmp(last_key, "type") == 0)
319 json_node->type = val;
321 if (strcasecmp(last_key, "fullscreen_mode") == 0)
322 json_node->fullscreen_mode = val;
324 if (strcasecmp(last_key, "num") == 0)
325 json_node->num = val;
327 if (strcasecmp(last_key, "current_border_width") == 0)
328 json_node->current_border_width = val;
330 if (strcasecmp(last_key, "depth") == 0)
331 json_node->depth = val;
333 if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
334 json_node->old_id = val;
337 struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
338 focus_mapping->old_id = val;
339 TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
342 if (parsing_rect || parsing_window_rect || parsing_geometry) {
345 r = &(json_node->rect);
346 else if (parsing_window_rect)
347 r = &(json_node->window_rect);
348 else r = &(json_node->geometry);
349 if (strcasecmp(last_key, "x") == 0)
351 else if (strcasecmp(last_key, "y") == 0)
353 else if (strcasecmp(last_key, "width") == 0)
355 else if (strcasecmp(last_key, "height") == 0)
357 else ELOG("WARNING: unknown key %s in rect\n", last_key);
358 DLOG("rect now: (%d, %d, %d, %d)\n",
359 r->x, r->y, r->width, r->height);
361 if (parsing_swallows) {
362 if (strcasecmp(last_key, "id") == 0) {
363 current_swallow->id = val;
365 if (strcasecmp(last_key, "dock") == 0) {
366 current_swallow->dock = val;
368 if (strcasecmp(last_key, "insert_where") == 0) {
369 current_swallow->insert_where = val;
376 static int json_bool(void *ctx, int val) {
377 LOG("bool %d for key %s\n", val, last_key);
378 if (strcasecmp(last_key, "focused") == 0 && val) {
379 to_focus = json_node;
382 if (parsing_swallows) {
383 if (strcasecmp(last_key, "restart_mode") == 0)
384 current_swallow->restart_mode = val;
390 static int json_double(void *ctx, double val) {
391 LOG("double %f for key %s\n", val, last_key);
392 if (strcasecmp(last_key, "percent") == 0) {
393 json_node->percent = val;
398 void tree_append_json(Con *con, const char *filename, char **errormsg) {
400 if ((f = fopen(filename, "r")) == NULL) {
401 LOG("Cannot open file \"%s\"\n", filename);
405 if (fstat(fileno(f), &stbuf) != 0) {
406 LOG("Cannot fstat() the file\n");
410 char *buf = smalloc(stbuf.st_size);
411 int n = fread(buf, 1, stbuf.st_size, f);
412 if (n != stbuf.st_size) {
413 LOG("File \"%s\" could not be read entirely, not loading.\n", filename);
417 LOG("read %d bytes\n", n);
420 static yajl_callbacks callbacks = {
421 .yajl_boolean = json_bool,
422 .yajl_integer = json_int,
423 .yajl_double = json_double,
424 .yajl_string = json_string,
425 .yajl_start_map = json_start_map,
426 .yajl_map_key = json_key,
427 .yajl_end_map = json_end_map,
428 .yajl_end_array = json_end_array,
431 g = yajl_gen_alloc(NULL);
432 hand = yajl_alloc(&callbacks, NULL, (void*)g);
434 g = yajl_gen_alloc(NULL, NULL);
435 hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
437 /* Allowing comments allows for more user-friendly layout files. */
438 yajl_config(hand, yajl_allow_comments, true);
439 /* Allow multiple values, i.e. multiple nodes to attach */
440 yajl_config(hand, yajl_allow_multiple_values, true);
444 parsing_swallows = false;
445 parsing_rect = false;
446 parsing_window_rect = false;
447 parsing_geometry = false;
448 parsing_focus = false;
449 setlocale(LC_NUMERIC, "C");
450 stat = yajl_parse(hand, (const unsigned char*)buf, n);
451 if (stat != yajl_status_ok)
453 unsigned char *str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
454 ELOG("JSON parsing error: %s\n", str);
455 if (errormsg != NULL)
456 *errormsg = sstrdup((const char*)str);
457 yajl_free_error(hand, str);
460 /* In case not all containers were restored, we need to fix the
461 * percentages, otherwise i3 will crash immediately when rendering the
463 con_fix_percent(con);
465 setlocale(LC_NUMERIC, "");
467 yajl_complete_parse(hand);
469 yajl_parse_complete(hand);