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 if (!parsing_swallows && !parsing_focus) {
94 con_fix_percent(json_node);
96 if (parsing_swallows) {
97 parsing_swallows = false;
100 /* Clear the list of focus mappings */
101 struct focus_mapping *mapping;
102 TAILQ_FOREACH_REVERSE(mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
103 LOG("focus (reverse) %d\n", mapping->old_id);
105 TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
106 if (con->old_id != mapping->old_id)
108 LOG("got it! %p\n", con);
109 /* Move this entry to the top of the focus list. */
110 TAILQ_REMOVE(&(json_node->focus_head), con, focused);
111 TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
115 while (!TAILQ_EMPTY(&focus_mappings)) {
116 mapping = TAILQ_FIRST(&focus_mappings);
117 TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
120 parsing_focus = false;
126 static int json_key(void *ctx, const unsigned char *val, unsigned int len) {
128 static int json_key(void *ctx, const unsigned char *val, size_t len) {
130 LOG("key: %.*s\n", (int)len, val);
132 last_key = scalloc((len+1) * sizeof(char));
133 memcpy(last_key, val, len);
134 if (strcasecmp(last_key, "swallows") == 0)
135 parsing_swallows = true;
137 if (strcasecmp(last_key, "rect") == 0)
140 if (strcasecmp(last_key, "window_rect") == 0)
141 parsing_window_rect = true;
143 if (strcasecmp(last_key, "geometry") == 0)
144 parsing_geometry = true;
146 if (strcasecmp(last_key, "focus") == 0)
147 parsing_focus = true;
153 static int json_string(void *ctx, const unsigned char *val, size_t len) {
155 static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
157 LOG("string: %.*s for key %s\n", (int)len, val, last_key);
158 if (parsing_swallows) {
160 sasprintf(&sval, "%.*s", len, val);
161 if (strcasecmp(last_key, "class") == 0) {
162 current_swallow->class = regex_new(sval);
163 } else if (strcasecmp(last_key, "instance") == 0) {
164 current_swallow->instance = regex_new(sval);
165 } else if (strcasecmp(last_key, "window_role") == 0) {
166 current_swallow->window_role = regex_new(sval);
167 } else if (strcasecmp(last_key, "title") == 0) {
168 current_swallow->title = regex_new(sval);
170 ELOG("swallow key %s unknown\n", last_key);
174 if (strcasecmp(last_key, "name") == 0) {
175 json_node->name = scalloc((len+1) * sizeof(char));
176 memcpy(json_node->name, val, len);
177 } else if (strcasecmp(last_key, "sticky_group") == 0) {
178 json_node->sticky_group = scalloc((len+1) * sizeof(char));
179 memcpy(json_node->sticky_group, val, len);
180 LOG("sticky_group of this container is %s\n", json_node->sticky_group);
181 } else if (strcasecmp(last_key, "orientation") == 0) {
182 /* Upgrade path from older versions of i3 (doing an inplace restart
183 * to a newer version):
184 * "orientation" is dumped before "layout". Therefore, we store
185 * whether the orientation was horizontal or vertical in the
186 * last_split_layout. When we then encounter layout == "default",
187 * we will use the last_split_layout as layout instead. */
189 sasprintf(&buf, "%.*s", (int)len, val);
190 if (strcasecmp(buf, "none") == 0 ||
191 strcasecmp(buf, "horizontal") == 0)
192 json_node->last_split_layout = L_SPLITH;
193 else if (strcasecmp(buf, "vertical") == 0)
194 json_node->last_split_layout = L_SPLITV;
195 else LOG("Unhandled orientation: %s\n", buf);
197 } else if (strcasecmp(last_key, "border") == 0) {
199 sasprintf(&buf, "%.*s", (int)len, val);
200 if (strcasecmp(buf, "none") == 0)
201 json_node->border_style = BS_NONE;
202 else if (strcasecmp(buf, "1pixel") == 0) {
203 json_node->border_style = BS_PIXEL;
204 json_node->current_border_width = 1;
205 } else if (strcasecmp(buf, "pixel") == 0)
206 json_node->border_style = BS_PIXEL;
207 else if (strcasecmp(buf, "normal") == 0)
208 json_node->border_style = BS_NORMAL;
209 else LOG("Unhandled \"border\": %s\n", buf);
211 } else if (strcasecmp(last_key, "type") == 0) {
213 sasprintf(&buf, "%.*s", (int)len, val);
214 if (strcasecmp(buf, "root") == 0)
215 json_node->type = CT_ROOT;
216 else if (strcasecmp(buf, "output") == 0)
217 json_node->type = CT_OUTPUT;
218 else if (strcasecmp(buf, "con") == 0)
219 json_node->type = CT_CON;
220 else if (strcasecmp(buf, "floating_con") == 0)
221 json_node->type = CT_FLOATING_CON;
222 else if (strcasecmp(buf, "workspace") == 0)
223 json_node->type = CT_WORKSPACE;
224 else if (strcasecmp(buf, "dockarea") == 0)
225 json_node->type = CT_DOCKAREA;
226 else LOG("Unhandled \"type\": %s\n", buf);
228 } else if (strcasecmp(last_key, "layout") == 0) {
230 sasprintf(&buf, "%.*s", (int)len, val);
231 if (strcasecmp(buf, "default") == 0)
232 /* This set above when we read "orientation". */
233 json_node->layout = json_node->last_split_layout;
234 else if (strcasecmp(buf, "stacked") == 0)
235 json_node->layout = L_STACKED;
236 else if (strcasecmp(buf, "tabbed") == 0)
237 json_node->layout = L_TABBED;
238 else if (strcasecmp(buf, "dockarea") == 0)
239 json_node->layout = L_DOCKAREA;
240 else if (strcasecmp(buf, "output") == 0)
241 json_node->layout = L_OUTPUT;
242 else if (strcasecmp(buf, "splith") == 0)
243 json_node->layout = L_SPLITH;
244 else if (strcasecmp(buf, "splitv") == 0)
245 json_node->layout = L_SPLITV;
246 else LOG("Unhandled \"layout\": %s\n", buf);
248 } else if (strcasecmp(last_key, "workspace_layout") == 0) {
250 sasprintf(&buf, "%.*s", (int)len, val);
251 if (strcasecmp(buf, "default") == 0)
252 json_node->workspace_layout = L_DEFAULT;
253 else if (strcasecmp(buf, "stacked") == 0)
254 json_node->workspace_layout = L_STACKED;
255 else if (strcasecmp(buf, "tabbed") == 0)
256 json_node->workspace_layout = L_TABBED;
257 else LOG("Unhandled \"workspace_layout\": %s\n", buf);
259 } else if (strcasecmp(last_key, "last_split_layout") == 0) {
261 sasprintf(&buf, "%.*s", (int)len, val);
262 if (strcasecmp(buf, "splith") == 0)
263 json_node->last_split_layout = L_SPLITH;
264 else if (strcasecmp(buf, "splitv") == 0)
265 json_node->last_split_layout = L_SPLITV;
266 else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
268 } else if (strcasecmp(last_key, "mark") == 0) {
270 sasprintf(&buf, "%.*s", (int)len, val);
271 json_node->mark = buf;
272 } else if (strcasecmp(last_key, "floating") == 0) {
274 sasprintf(&buf, "%.*s", (int)len, val);
275 if (strcasecmp(buf, "auto_off") == 0)
276 json_node->floating = FLOATING_AUTO_OFF;
277 else if (strcasecmp(buf, "auto_on") == 0)
278 json_node->floating = FLOATING_AUTO_ON;
279 else if (strcasecmp(buf, "user_off") == 0)
280 json_node->floating = FLOATING_USER_OFF;
281 else if (strcasecmp(buf, "user_on") == 0)
282 json_node->floating = FLOATING_USER_ON;
284 } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
286 sasprintf(&buf, "%.*s", (int)len, val);
287 if (strcasecmp(buf, "none") == 0)
288 json_node->scratchpad_state = SCRATCHPAD_NONE;
289 else if (strcasecmp(buf, "fresh") == 0)
290 json_node->scratchpad_state = SCRATCHPAD_FRESH;
291 else if (strcasecmp(buf, "changed") == 0)
292 json_node->scratchpad_state = SCRATCHPAD_CHANGED;
300 static int json_int(void *ctx, long long val) {
301 LOG("int %lld for key %s\n", val, last_key);
303 static int json_int(void *ctx, long val) {
304 LOG("int %ld for key %s\n", val, last_key);
306 /* For backwards compatibility with i3 < 4.8 */
307 if (strcasecmp(last_key, "type") == 0)
308 json_node->type = val;
310 if (strcasecmp(last_key, "fullscreen_mode") == 0)
311 json_node->fullscreen_mode = val;
313 if (strcasecmp(last_key, "num") == 0)
314 json_node->num = val;
316 if (strcasecmp(last_key, "current_border_width") == 0)
317 json_node->current_border_width = val;
319 if (strcasecmp(last_key, "depth") == 0)
320 json_node->depth = val;
322 if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
323 json_node->old_id = val;
326 struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
327 focus_mapping->old_id = val;
328 TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
331 if (parsing_rect || parsing_window_rect || parsing_geometry) {
334 r = &(json_node->rect);
335 else if (parsing_window_rect)
336 r = &(json_node->window_rect);
337 else r = &(json_node->geometry);
338 if (strcasecmp(last_key, "x") == 0)
340 else if (strcasecmp(last_key, "y") == 0)
342 else if (strcasecmp(last_key, "width") == 0)
344 else if (strcasecmp(last_key, "height") == 0)
346 else ELOG("WARNING: unknown key %s in rect\n", last_key);
347 DLOG("rect now: (%d, %d, %d, %d)\n",
348 r->x, r->y, r->width, r->height);
350 if (parsing_swallows) {
351 if (strcasecmp(last_key, "id") == 0) {
352 current_swallow->id = val;
354 if (strcasecmp(last_key, "dock") == 0) {
355 current_swallow->dock = val;
357 if (strcasecmp(last_key, "insert_where") == 0) {
358 current_swallow->insert_where = val;
365 static int json_bool(void *ctx, int val) {
366 LOG("bool %d for key %s\n", val, last_key);
367 if (strcasecmp(last_key, "focused") == 0 && val) {
368 to_focus = json_node;
371 if (parsing_swallows) {
372 if (strcasecmp(last_key, "restart_mode") == 0)
373 current_swallow->restart_mode = val;
379 static int json_double(void *ctx, double val) {
380 LOG("double %f for key %s\n", val, last_key);
381 if (strcasecmp(last_key, "percent") == 0) {
382 json_node->percent = val;
387 void tree_append_json(const char *filename) {
389 if ((f = fopen(filename, "r")) == NULL) {
390 LOG("Cannot open file \"%s\"\n", filename);
394 if (fstat(fileno(f), &stbuf) != 0) {
395 LOG("Cannot fstat() the file\n");
399 char *buf = smalloc(stbuf.st_size);
400 int n = fread(buf, 1, stbuf.st_size, f);
401 if (n != stbuf.st_size) {
402 LOG("File \"%s\" could not be read entirely, not loading.\n", filename);
406 LOG("read %d bytes\n", n);
409 yajl_callbacks callbacks = {
410 .yajl_boolean = json_bool,
411 .yajl_integer = json_int,
412 .yajl_double = json_double,
413 .yajl_string = json_string,
414 .yajl_start_map = json_start_map,
415 .yajl_map_key = json_key,
416 .yajl_end_map = json_end_map,
417 .yajl_end_array = json_end_array,
420 g = yajl_gen_alloc(NULL);
421 hand = yajl_alloc(&callbacks, NULL, (void*)g);
423 g = yajl_gen_alloc(NULL, NULL);
424 hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
426 /* Allowing comments allows for more user-friendly layout files. */
427 yajl_config(hand, yajl_allow_comments, true);
428 /* Allow multiple values, i.e. multiple nodes to attach */
429 yajl_config(hand, yajl_allow_multiple_values, true);
433 parsing_swallows = false;
434 parsing_rect = false;
435 parsing_window_rect = false;
436 parsing_geometry = false;
437 parsing_focus = false;
438 setlocale(LC_NUMERIC, "C");
439 stat = yajl_parse(hand, (const unsigned char*)buf, n);
440 if (stat != yajl_status_ok)
442 unsigned char *str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
443 ELOG("JSON parsing error: %s\n", str);
444 yajl_free_error(hand, str);
446 /* In case not all containers were restored, we need to fix the
447 * percentages, otherwise i3 will crash immediately when rendering the
449 con_fix_percent(focused);
452 setlocale(LC_NUMERIC, "");
454 yajl_complete_parse(hand);
456 yajl_parse_complete(hand);