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;
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;
84 if (parsing_window_rect)
85 parsing_window_rect = false;
87 parsing_geometry = false;
91 static int json_end_array(void *ctx) {
92 LOG("end of array\n");
93 parsing_swallows = false;
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);
100 TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
101 if (con->old_id != mapping->old_id)
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);
110 while (!TAILQ_EMPTY(&focus_mappings)) {
111 mapping = TAILQ_FIRST(&focus_mappings);
112 TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
115 parsing_focus = false;
121 static int json_key(void *ctx, const unsigned char *val, unsigned int len) {
123 static int json_key(void *ctx, const unsigned char *val, size_t len) {
125 LOG("key: %.*s\n", (int)len, val);
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;
132 if (strcasecmp(last_key, "rect") == 0)
135 if (strcasecmp(last_key, "window_rect") == 0)
136 parsing_window_rect = true;
138 if (strcasecmp(last_key, "geometry") == 0)
139 parsing_geometry = true;
141 if (strcasecmp(last_key, "focus") == 0)
142 parsing_focus = true;
148 static int json_string(void *ctx, const unsigned char *val, size_t len) {
150 static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
152 LOG("string: %.*s for key %s\n", (int)len, val, last_key);
153 if (parsing_swallows) {
155 sasprintf(&sval, "%.*s", len, val);
156 if (strcasecmp(last_key, "class") == 0) {
157 current_swallow->class = regex_new(sval);
158 } else if (strcasecmp(last_key, "instance") == 0) {
159 current_swallow->instance = regex_new(sval);
160 } else if (strcasecmp(last_key, "window_role") == 0) {
161 current_swallow->window_role = regex_new(sval);
162 } else if (strcasecmp(last_key, "title") == 0) {
163 current_swallow->title = regex_new(sval);
165 ELOG("swallow key %s unknown\n", last_key);
169 if (strcasecmp(last_key, "name") == 0) {
170 json_node->name = scalloc((len+1) * sizeof(char));
171 memcpy(json_node->name, val, len);
172 } else if (strcasecmp(last_key, "sticky_group") == 0) {
173 json_node->sticky_group = scalloc((len+1) * sizeof(char));
174 memcpy(json_node->sticky_group, val, len);
175 LOG("sticky_group of this container is %s\n", json_node->sticky_group);
176 } else if (strcasecmp(last_key, "orientation") == 0) {
177 /* Upgrade path from older versions of i3 (doing an inplace restart
178 * to a newer version):
179 * "orientation" is dumped before "layout". Therefore, we store
180 * whether the orientation was horizontal or vertical in the
181 * last_split_layout. When we then encounter layout == "default",
182 * we will use the last_split_layout as layout instead. */
184 sasprintf(&buf, "%.*s", (int)len, val);
185 if (strcasecmp(buf, "none") == 0 ||
186 strcasecmp(buf, "horizontal") == 0)
187 json_node->last_split_layout = L_SPLITH;
188 else if (strcasecmp(buf, "vertical") == 0)
189 json_node->last_split_layout = L_SPLITV;
190 else LOG("Unhandled orientation: %s\n", buf);
192 } else if (strcasecmp(last_key, "border") == 0) {
194 sasprintf(&buf, "%.*s", (int)len, val);
195 if (strcasecmp(buf, "none") == 0)
196 json_node->border_style = BS_NONE;
197 else if (strcasecmp(buf, "1pixel") == 0) {
198 json_node->border_style = BS_PIXEL;
199 json_node->current_border_width = 1;
200 } else if (strcasecmp(buf, "pixel") == 0)
201 json_node->border_style = BS_PIXEL;
202 else if (strcasecmp(buf, "normal") == 0)
203 json_node->border_style = BS_NORMAL;
204 else LOG("Unhandled \"border\": %s\n", buf);
206 } else if (strcasecmp(last_key, "type") == 0) {
208 sasprintf(&buf, "%.*s", (int)len, val);
209 if (strcasecmp(buf, "root") == 0)
210 json_node->type = CT_ROOT;
211 else if (strcasecmp(buf, "output") == 0)
212 json_node->type = CT_OUTPUT;
213 else if (strcasecmp(buf, "con") == 0)
214 json_node->type = CT_CON;
215 else if (strcasecmp(buf, "floating_con") == 0)
216 json_node->type = CT_FLOATING_CON;
217 else if (strcasecmp(buf, "workspace") == 0)
218 json_node->type = CT_WORKSPACE;
219 else if (strcasecmp(buf, "dockarea") == 0)
220 json_node->type = CT_DOCKAREA;
221 else LOG("Unhandled \"type\": %s\n", buf);
223 } else if (strcasecmp(last_key, "layout") == 0) {
225 sasprintf(&buf, "%.*s", (int)len, val);
226 if (strcasecmp(buf, "default") == 0)
227 /* This set above when we read "orientation". */
228 json_node->layout = json_node->last_split_layout;
229 else if (strcasecmp(buf, "stacked") == 0)
230 json_node->layout = L_STACKED;
231 else if (strcasecmp(buf, "tabbed") == 0)
232 json_node->layout = L_TABBED;
233 else if (strcasecmp(buf, "dockarea") == 0)
234 json_node->layout = L_DOCKAREA;
235 else if (strcasecmp(buf, "output") == 0)
236 json_node->layout = L_OUTPUT;
237 else if (strcasecmp(buf, "splith") == 0)
238 json_node->layout = L_SPLITH;
239 else if (strcasecmp(buf, "splitv") == 0)
240 json_node->layout = L_SPLITV;
241 else LOG("Unhandled \"layout\": %s\n", buf);
243 } else if (strcasecmp(last_key, "workspace_layout") == 0) {
245 sasprintf(&buf, "%.*s", (int)len, val);
246 if (strcasecmp(buf, "default") == 0)
247 json_node->workspace_layout = L_DEFAULT;
248 else if (strcasecmp(buf, "stacked") == 0)
249 json_node->workspace_layout = L_STACKED;
250 else if (strcasecmp(buf, "tabbed") == 0)
251 json_node->workspace_layout = L_TABBED;
252 else LOG("Unhandled \"workspace_layout\": %s\n", buf);
254 } else if (strcasecmp(last_key, "last_split_layout") == 0) {
256 sasprintf(&buf, "%.*s", (int)len, val);
257 if (strcasecmp(buf, "splith") == 0)
258 json_node->last_split_layout = L_SPLITH;
259 else if (strcasecmp(buf, "splitv") == 0)
260 json_node->last_split_layout = L_SPLITV;
261 else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
263 } else if (strcasecmp(last_key, "mark") == 0) {
265 sasprintf(&buf, "%.*s", (int)len, val);
266 json_node->mark = buf;
267 } else if (strcasecmp(last_key, "floating") == 0) {
269 sasprintf(&buf, "%.*s", (int)len, val);
270 if (strcasecmp(buf, "auto_off") == 0)
271 json_node->floating = FLOATING_AUTO_OFF;
272 else if (strcasecmp(buf, "auto_on") == 0)
273 json_node->floating = FLOATING_AUTO_ON;
274 else if (strcasecmp(buf, "user_off") == 0)
275 json_node->floating = FLOATING_USER_OFF;
276 else if (strcasecmp(buf, "user_on") == 0)
277 json_node->floating = FLOATING_USER_ON;
279 } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
281 sasprintf(&buf, "%.*s", (int)len, val);
282 if (strcasecmp(buf, "none") == 0)
283 json_node->scratchpad_state = SCRATCHPAD_NONE;
284 else if (strcasecmp(buf, "fresh") == 0)
285 json_node->scratchpad_state = SCRATCHPAD_FRESH;
286 else if (strcasecmp(buf, "changed") == 0)
287 json_node->scratchpad_state = SCRATCHPAD_CHANGED;
295 static int json_int(void *ctx, long long val) {
296 LOG("int %lld for key %s\n", val, last_key);
298 static int json_int(void *ctx, long val) {
299 LOG("int %ld for key %s\n", val, last_key);
301 /* For backwards compatibility with i3 < 4.8 */
302 if (strcasecmp(last_key, "type") == 0)
303 json_node->type = val;
305 if (strcasecmp(last_key, "fullscreen_mode") == 0)
306 json_node->fullscreen_mode = val;
308 if (strcasecmp(last_key, "num") == 0)
309 json_node->num = val;
311 if (strcasecmp(last_key, "current_border_width") == 0)
312 json_node->current_border_width = val;
314 if (strcasecmp(last_key, "depth") == 0)
315 json_node->depth = val;
317 if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
318 json_node->old_id = val;
321 struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
322 focus_mapping->old_id = val;
323 TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
326 if (parsing_rect || parsing_window_rect || parsing_geometry) {
329 r = &(json_node->rect);
330 else if (parsing_window_rect)
331 r = &(json_node->window_rect);
332 else r = &(json_node->geometry);
333 if (strcasecmp(last_key, "x") == 0)
335 else if (strcasecmp(last_key, "y") == 0)
337 else if (strcasecmp(last_key, "width") == 0)
339 else if (strcasecmp(last_key, "height") == 0)
341 else ELOG("WARNING: unknown key %s in rect\n", last_key);
342 DLOG("rect now: (%d, %d, %d, %d)\n",
343 r->x, r->y, r->width, r->height);
345 if (parsing_swallows) {
346 if (strcasecmp(last_key, "id") == 0) {
347 current_swallow->id = val;
349 if (strcasecmp(last_key, "dock") == 0) {
350 current_swallow->dock = val;
352 if (strcasecmp(last_key, "insert_where") == 0) {
353 current_swallow->insert_where = val;
360 static int json_bool(void *ctx, int val) {
361 LOG("bool %d for key %s\n", val, last_key);
362 if (strcasecmp(last_key, "focused") == 0 && val) {
363 to_focus = json_node;
366 if (parsing_swallows) {
367 if (strcasecmp(last_key, "restart_mode") == 0)
368 current_swallow->restart_mode = val;
374 static int json_double(void *ctx, double val) {
375 LOG("double %f for key %s\n", val, last_key);
376 if (strcasecmp(last_key, "percent") == 0) {
377 json_node->percent = val;
382 void tree_append_json(const char *filename) {
383 /* TODO: percent of other windows are not correctly fixed at the moment */
385 if ((f = fopen(filename, "r")) == NULL) {
386 LOG("Cannot open file \"%s\"\n", filename);
390 if (fstat(fileno(f), &stbuf) != 0) {
391 LOG("Cannot fstat() the file\n");
395 char *buf = smalloc(stbuf.st_size);
396 int n = fread(buf, 1, stbuf.st_size, f);
397 if (n != stbuf.st_size) {
398 LOG("File \"%s\" could not be read entirely, not loading.\n", filename);
402 LOG("read %d bytes\n", n);
405 yajl_callbacks callbacks = {
406 .yajl_boolean = json_bool,
407 .yajl_integer = json_int,
408 .yajl_double = json_double,
409 .yajl_string = json_string,
410 .yajl_start_map = json_start_map,
411 .yajl_map_key = json_key,
412 .yajl_end_map = json_end_map,
413 .yajl_end_array = json_end_array,
416 g = yajl_gen_alloc(NULL);
417 hand = yajl_alloc(&callbacks, NULL, (void*)g);
419 g = yajl_gen_alloc(NULL, NULL);
420 hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
422 /* Allowing comments allows for more user-friendly layout files. */
423 yajl_config(hand, yajl_allow_comments, true);
424 /* Allow multiple values, i.e. multiple nodes to attach */
425 yajl_config(hand, yajl_allow_multiple_values, true);
429 parsing_swallows = false;
430 parsing_rect = false;
431 parsing_window_rect = false;
432 parsing_geometry = false;
433 parsing_focus = false;
434 setlocale(LC_NUMERIC, "C");
435 stat = yajl_parse(hand, (const unsigned char*)buf, n);
436 if (stat != yajl_status_ok)
438 unsigned char *str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
439 ELOG("JSON parsing error: %s\n", str);
440 yajl_free_error(hand, str);
442 /* In case not all containers were restored, we need to fix the
443 * percentages, otherwise i3 will crash immediately when rendering the
445 con_fix_percent(focused);
448 setlocale(LC_NUMERIC, "");
450 yajl_complete_parse(hand);
452 yajl_parse_complete(hand);