i3
load_layout.c
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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;
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 {
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(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(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");
70  LOG("attaching\n");
71  con_attach(json_node, json_node->parent, true);
72  json_node = json_node->parent;
73  }
74  if (parsing_rect)
75  parsing_rect = false;
77  parsing_window_rect = false;
78  if (parsing_geometry)
79  parsing_geometry = false;
80  return 1;
81 }
82 
83 static int json_end_array(void *ctx) {
84  LOG("end of array\n");
85  parsing_swallows = false;
86  if (parsing_focus) {
87  /* Clear the list of focus mappings */
88  struct focus_mapping *mapping;
89  TAILQ_FOREACH_REVERSE(mapping, &focus_mappings, focus_mappings_head, focus_mappings) {
90  LOG("focus (reverse) %d\n", mapping->old_id);
91  Con *con;
92  TAILQ_FOREACH(con, &(json_node->focus_head), focused) {
93  if (con->old_id != mapping->old_id)
94  continue;
95  LOG("got it! %p\n", con);
96  /* Move this entry to the top of the focus list. */
97  TAILQ_REMOVE(&(json_node->focus_head), con, focused);
98  TAILQ_INSERT_HEAD(&(json_node->focus_head), con, focused);
99  break;
100  }
101  }
102  while (!TAILQ_EMPTY(&focus_mappings)) {
103  mapping = TAILQ_FIRST(&focus_mappings);
104  TAILQ_REMOVE(&focus_mappings, mapping, focus_mappings);
105  free(mapping);
106  }
107  parsing_focus = false;
108  }
109  return 1;
110 }
111 
112 #if YAJL_MAJOR < 2
113 static int json_key(void *ctx, const unsigned char *val, unsigned int len) {
114 #else
115 static int json_key(void *ctx, const unsigned char *val, size_t len) {
116 #endif
117  LOG("key: %.*s\n", (int)len, val);
118  FREE(last_key);
119  last_key = scalloc((len+1) * sizeof(char));
120  memcpy(last_key, val, len);
121  if (strcasecmp(last_key, "swallows") == 0)
122  parsing_swallows = true;
123 
124  if (strcasecmp(last_key, "rect") == 0)
125  parsing_rect = true;
126 
127  if (strcasecmp(last_key, "window_rect") == 0)
128  parsing_window_rect = true;
129 
130  if (strcasecmp(last_key, "geometry") == 0)
131  parsing_geometry = true;
132 
133  if (strcasecmp(last_key, "focus") == 0)
134  parsing_focus = true;
135 
136  return 1;
137 }
138 
139 #if YAJL_MAJOR >= 2
140 static int json_string(void *ctx, const unsigned char *val, size_t len) {
141 #else
142 static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
143 #endif
144  LOG("string: %.*s for key %s\n", (int)len, val, last_key);
145  if (parsing_swallows) {
146  /* TODO: the other swallowing keys */
147  if (strcasecmp(last_key, "class") == 0) {
148  current_swallow->class = scalloc((len+1) * sizeof(char));
149  memcpy(current_swallow->class, val, len);
150  }
151  LOG("unhandled yet: swallow\n");
152  } else {
153  if (strcasecmp(last_key, "name") == 0) {
154  json_node->name = scalloc((len+1) * sizeof(char));
155  memcpy(json_node->name, val, len);
156  } else if (strcasecmp(last_key, "sticky_group") == 0) {
157  json_node->sticky_group = scalloc((len+1) * sizeof(char));
158  memcpy(json_node->sticky_group, val, len);
159  LOG("sticky_group of this container is %s\n", json_node->sticky_group);
160  } else if (strcasecmp(last_key, "orientation") == 0) {
161  /* Upgrade path from older versions of i3 (doing an inplace restart
162  * to a newer version):
163  * "orientation" is dumped before "layout". Therefore, we store
164  * whether the orientation was horizontal or vertical in the
165  * last_split_layout. When we then encounter layout == "default",
166  * we will use the last_split_layout as layout instead. */
167  char *buf = NULL;
168  sasprintf(&buf, "%.*s", (int)len, val);
169  if (strcasecmp(buf, "none") == 0 ||
170  strcasecmp(buf, "horizontal") == 0)
171  json_node->last_split_layout = L_SPLITH;
172  else if (strcasecmp(buf, "vertical") == 0)
173  json_node->last_split_layout = L_SPLITV;
174  else LOG("Unhandled orientation: %s\n", buf);
175 
176  /* What used to be an implicit check whether orientation !=
177  * NO_ORIENTATION is now a proper separate flag. */
178  if (strcasecmp(buf, "none") != 0)
179  json_node->split = true;
180  free(buf);
181  } else if (strcasecmp(last_key, "border") == 0) {
182  char *buf = NULL;
183  sasprintf(&buf, "%.*s", (int)len, val);
184  if (strcasecmp(buf, "none") == 0)
185  json_node->border_style = BS_NONE;
186  else if (strcasecmp(buf, "1pixel") == 0)
187  json_node->border_style = BS_1PIXEL;
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  /* Necessary for migrating from older versions of i3. */
205  json_node->split = false;
206  } else if (strcasecmp(buf, "output") == 0)
207  json_node->layout = L_OUTPUT;
208  else if (strcasecmp(buf, "splith") == 0)
209  json_node->layout = L_SPLITH;
210  else if (strcasecmp(buf, "splitv") == 0)
211  json_node->layout = L_SPLITV;
212  else LOG("Unhandled \"layout\": %s\n", buf);
213  free(buf);
214  } else if (strcasecmp(last_key, "workspace_layout") == 0) {
215  char *buf = NULL;
216  sasprintf(&buf, "%.*s", (int)len, val);
217  if (strcasecmp(buf, "default") == 0)
218  json_node->workspace_layout = L_DEFAULT;
219  else if (strcasecmp(buf, "stacked") == 0)
220  json_node->workspace_layout = L_STACKED;
221  else if (strcasecmp(buf, "tabbed") == 0)
222  json_node->workspace_layout = L_TABBED;
223  else LOG("Unhandled \"workspace_layout\": %s\n", buf);
224  free(buf);
225  } else if (strcasecmp(last_key, "last_split_layout") == 0) {
226  char *buf = NULL;
227  sasprintf(&buf, "%.*s", (int)len, val);
228  if (strcasecmp(buf, "splith") == 0)
229  json_node->last_split_layout = L_SPLITH;
230  else if (strcasecmp(buf, "splitv") == 0)
231  json_node->last_split_layout = L_SPLITV;
232  else LOG("Unhandled \"last_splitlayout\": %s\n", buf);
233  free(buf);
234  } else if (strcasecmp(last_key, "mark") == 0) {
235  char *buf = NULL;
236  sasprintf(&buf, "%.*s", (int)len, val);
237  json_node->mark = buf;
238  } else if (strcasecmp(last_key, "floating") == 0) {
239  char *buf = NULL;
240  sasprintf(&buf, "%.*s", (int)len, val);
241  if (strcasecmp(buf, "auto_off") == 0)
242  json_node->floating = FLOATING_AUTO_OFF;
243  else if (strcasecmp(buf, "auto_on") == 0)
244  json_node->floating = FLOATING_AUTO_ON;
245  else if (strcasecmp(buf, "user_off") == 0)
246  json_node->floating = FLOATING_USER_OFF;
247  else if (strcasecmp(buf, "user_on") == 0)
248  json_node->floating = FLOATING_USER_ON;
249  free(buf);
250  } else if (strcasecmp(last_key, "scratchpad_state") == 0) {
251  char *buf = NULL;
252  sasprintf(&buf, "%.*s", (int)len, val);
253  if (strcasecmp(buf, "none") == 0)
254  json_node->scratchpad_state = SCRATCHPAD_NONE;
255  else if (strcasecmp(buf, "fresh") == 0)
256  json_node->scratchpad_state = SCRATCHPAD_FRESH;
257  else if (strcasecmp(buf, "changed") == 0)
258  json_node->scratchpad_state = SCRATCHPAD_CHANGED;
259  free(buf);
260  }
261  }
262  return 1;
263 }
264 
265 #if YAJL_MAJOR >= 2
266 static int json_int(void *ctx, long long val) {
267  LOG("int %lld for key %s\n", val, last_key);
268 #else
269 static int json_int(void *ctx, long val) {
270  LOG("int %ld for key %s\n", val, last_key);
271 #endif
272  if (strcasecmp(last_key, "type") == 0)
273  json_node->type = val;
274 
275  if (strcasecmp(last_key, "fullscreen_mode") == 0)
276  json_node->fullscreen_mode = val;
277 
278  if (strcasecmp(last_key, "num") == 0)
279  json_node->num = val;
280 
281  if (!parsing_swallows && strcasecmp(last_key, "id") == 0)
282  json_node->old_id = val;
283 
284  if (parsing_focus) {
285  struct focus_mapping *focus_mapping = scalloc(sizeof(struct focus_mapping));
286  focus_mapping->old_id = val;
287  TAILQ_INSERT_TAIL(&focus_mappings, focus_mapping, focus_mappings);
288  }
289 
291  Rect *r;
292  if (parsing_rect)
293  r = &(json_node->rect);
294  else if (parsing_window_rect)
295  r = &(json_node->window_rect);
296  else r = &(json_node->geometry);
297  if (strcasecmp(last_key, "x") == 0)
298  r->x = val;
299  else if (strcasecmp(last_key, "y") == 0)
300  r->y = val;
301  else if (strcasecmp(last_key, "width") == 0)
302  r->width = val;
303  else if (strcasecmp(last_key, "height") == 0)
304  r->height = val;
305  else printf("WARNING: unknown key %s in rect\n", last_key);
306  printf("rect now: (%d, %d, %d, %d)\n",
307  r->x, r->y, r->width, r->height);
308  }
309  if (parsing_swallows) {
310  if (strcasecmp(last_key, "id") == 0) {
311  current_swallow->id = val;
312  }
313  if (strcasecmp(last_key, "dock") == 0) {
314  current_swallow->dock = val;
315  }
316  if (strcasecmp(last_key, "insert_where") == 0) {
317  current_swallow->insert_where = val;
318  }
319  }
320 
321  return 1;
322 }
323 
324 static int json_bool(void *ctx, int val) {
325  LOG("bool %d for key %s\n", val, last_key);
326  if (strcasecmp(last_key, "focused") == 0 && val) {
327  to_focus = json_node;
328  }
329 
330  if (strcasecmp(last_key, "split") == 0)
331  json_node->split = val;
332 
333  if (parsing_swallows) {
334  if (strcasecmp(last_key, "restart_mode") == 0)
335  current_swallow->restart_mode = val;
336  }
337 
338  return 1;
339 }
340 
341 static int json_double(void *ctx, double val) {
342  LOG("double %f for key %s\n", val, last_key);
343  if (strcasecmp(last_key, "percent") == 0) {
344  json_node->percent = val;
345  }
346  return 1;
347 }
348 
349 void tree_append_json(const char *filename) {
350  /* TODO: percent of other windows are not correctly fixed at the moment */
351  FILE *f;
352  if ((f = fopen(filename, "r")) == NULL) {
353  LOG("Cannot open file\n");
354  return;
355  }
356  char *buf = malloc(65535); /* TODO */
357  int n = fread(buf, 1, 65535, f);
358  LOG("read %d bytes\n", n);
359  yajl_gen g;
360  yajl_handle hand;
361  yajl_callbacks callbacks;
362  memset(&callbacks, '\0', sizeof(yajl_callbacks));
363  callbacks.yajl_start_map = json_start_map;
364  callbacks.yajl_end_map = json_end_map;
365  callbacks.yajl_end_array = json_end_array;
366  callbacks.yajl_string = json_string;
367  callbacks.yajl_map_key = json_key;
368  callbacks.yajl_integer = json_int;
369  callbacks.yajl_double = json_double;
370  callbacks.yajl_boolean = json_bool;
371 #if YAJL_MAJOR >= 2
372  g = yajl_gen_alloc(NULL);
373  hand = yajl_alloc(&callbacks, NULL, (void*)g);
374 #else
375  g = yajl_gen_alloc(NULL, NULL);
376  hand = yajl_alloc(&callbacks, NULL, NULL, (void*)g);
377 #endif
378  yajl_status stat;
379  json_node = focused;
380  to_focus = NULL;
381  parsing_rect = false;
382  parsing_window_rect = false;
383  parsing_geometry = false;
384  setlocale(LC_NUMERIC, "C");
385  stat = yajl_parse(hand, (const unsigned char*)buf, n);
386  if (stat != yajl_status_ok)
387  {
388  unsigned char * str = yajl_get_error(hand, 1, (const unsigned char*)buf, n);
389  fprintf(stderr, "%s\n", (const char *) str);
390  yajl_free_error(hand, str);
391  }
392 
393  setlocale(LC_NUMERIC, "");
394 #if YAJL_MAJOR >= 2
395  yajl_complete_parse(hand);
396 #else
397  yajl_parse_complete(hand);
398 #endif
399 
400  fclose(f);
401  if (to_focus)
402  con_focus(to_focus);
403 }