i3
window.c
Go to the documentation of this file.
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  * window.c: Updates window attributes (X11 hints/properties).
8  *
9  */
10 #include "all.h"
11 
12 /*
13  * Updates the WM_CLASS (consisting of the class and instance) for the
14  * given window.
15  *
16  */
17 void window_update_class(i3Window *win, xcb_get_property_reply_t *prop, bool before_mgmt) {
18  if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
19  DLOG("WM_CLASS not set.\n");
20  FREE(prop);
21  return;
22  }
23 
24  /* We cannot use asprintf here since this property contains two
25  * null-terminated strings (for compatibility reasons). Instead, we
26  * use strdup() on both strings */
27  char *new_class = xcb_get_property_value(prop);
28 
29  FREE(win->class_instance);
30  FREE(win->class_class);
31 
32  win->class_instance = sstrdup(new_class);
33  if ((strlen(new_class) + 1) < xcb_get_property_value_length(prop))
34  win->class_class = sstrdup(new_class + strlen(new_class) + 1);
35  else win->class_class = NULL;
36  LOG("WM_CLASS changed to %s (instance), %s (class)\n",
37  win->class_instance, win->class_class);
38 
39  if (before_mgmt) {
40  free(prop);
41  return;
42  }
43 
44  run_assignments(win);
45 
46  free(prop);
47 }
48 
49 /*
50  * Updates the name by using _NET_WM_NAME (encoded in UTF-8) for the given
51  * window. Further updates using window_update_name_legacy will be ignored.
52  *
53  */
54 void window_update_name(i3Window *win, xcb_get_property_reply_t *prop, bool before_mgmt) {
55  if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
56  DLOG("_NET_WM_NAME not specified, not changing\n");
57  FREE(prop);
58  return;
59  }
60 
61  /* Save the old pointer to make the update atomic */
62  char *new_name;
63  if (asprintf(&new_name, "%.*s", xcb_get_property_value_length(prop),
64  (char*)xcb_get_property_value(prop)) == -1) {
65  perror("asprintf()");
66  DLOG("Could not get window name\n");
67  free(prop);
68  return;
69  }
70  /* Convert it to UCS-2 here for not having to convert it later every time we want to pass it to X */
71  size_t len;
72  xcb_char2b_t *ucs2_name = convert_utf8_to_ucs2(new_name, &len);
73  if (ucs2_name == NULL) {
74  LOG("Could not convert _NET_WM_NAME to UCS-2, ignoring new hint\n");
75  FREE(new_name);
76  free(prop);
77  return;
78  }
79  FREE(win->name_x);
80  FREE(win->name_json);
81  win->name_json = new_name;
82  win->name_x = (char*)ucs2_name;
83  win->name_len = len;
84  win->name_x_changed = true;
85  LOG("_NET_WM_NAME changed to \"%s\"\n", win->name_json);
86 
87  win->uses_net_wm_name = true;
88 
89  if (before_mgmt) {
90  free(prop);
91  return;
92  }
93 
94  run_assignments(win);
95 
96  free(prop);
97 }
98 
99 /*
100  * Updates the name by using WM_NAME (encoded in COMPOUND_TEXT). We do not
101  * touch what the client sends us but pass it to xcb_image_text_8. To get
102  * proper unicode rendering, the application has to use _NET_WM_NAME (see
103  * window_update_name()).
104  *
105  */
106 void window_update_name_legacy(i3Window *win, xcb_get_property_reply_t *prop, bool before_mgmt) {
107  if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
108  DLOG("WM_NAME not set (_NET_WM_NAME is what you want anyways).\n");
109  FREE(prop);
110  return;
111  }
112 
113  /* ignore update when the window is known to already have a UTF-8 name */
114  if (win->uses_net_wm_name) {
115  free(prop);
116  return;
117  }
118 
119  char *new_name;
120  if (asprintf(&new_name, "%.*s", xcb_get_property_value_length(prop),
121  (char*)xcb_get_property_value(prop)) == -1) {
122  perror("asprintf()");
123  DLOG("Could not get legacy window name\n");
124  free(prop);
125  return;
126  }
127 
128  LOG("WM_NAME changed to \"%s\"\n", new_name);
129  LOG("Using legacy window title. Note that in order to get Unicode window "
130  "titles in i3, the application has to set _NET_WM_NAME (UTF-8)\n");
131 
132  FREE(win->name_x);
133  FREE(win->name_json);
134  win->name_x = new_name;
135  win->name_json = sstrdup(new_name);
136  win->name_len = strlen(new_name);
137  win->name_x_changed = true;
138 
139  if (before_mgmt) {
140  free(prop);
141  return;
142  }
143 
144  run_assignments(win);
145 
146  free(prop);
147 }
148 
149 /*
150  * Updates the CLIENT_LEADER (logical parent window).
151  *
152  */
153 void window_update_leader(i3Window *win, xcb_get_property_reply_t *prop) {
154  if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
155  DLOG("CLIENT_LEADER not set.\n");
156  FREE(prop);
157  return;
158  }
159 
160  xcb_window_t *leader = xcb_get_property_value(prop);
161  if (leader == NULL) {
162  free(prop);
163  return;
164  }
165 
166  DLOG("Client leader changed to %08x\n", *leader);
167 
168  win->leader = *leader;
169 
170  free(prop);
171 }
172 
173 /*
174  * Updates the TRANSIENT_FOR (logical parent window).
175  *
176  */
177 void window_update_transient_for(i3Window *win, xcb_get_property_reply_t *prop) {
178  if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
179  DLOG("TRANSIENT_FOR not set.\n");
180  FREE(prop);
181  return;
182  }
183 
184  xcb_window_t transient_for;
185  if (!xcb_icccm_get_wm_transient_for_from_reply(&transient_for, prop)) {
186  free(prop);
187  return;
188  }
189 
190  DLOG("Transient for changed to %08x\n", transient_for);
191 
192  win->transient_for = transient_for;
193 
194  free(prop);
195 }
196 
197 /*
198  * Updates the _NET_WM_STRUT_PARTIAL (reserved pixels at the screen edges)
199  *
200  */
201 void window_update_strut_partial(i3Window *win, xcb_get_property_reply_t *prop) {
202  if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
203  DLOG("_NET_WM_STRUT_PARTIAL not set.\n");
204  FREE(prop);
205  return;
206  }
207 
208  uint32_t *strut;
209  if (!(strut = xcb_get_property_value(prop))) {
210  free(prop);
211  return;
212  }
213 
214  DLOG("Reserved pixels changed to: left = %d, right = %d, top = %d, bottom = %d\n",
215  strut[0], strut[1], strut[2], strut[3]);
216 
217  win->reserved = (struct reservedpx){ strut[0], strut[1], strut[2], strut[3] };
218 
219  free(prop);
220 }
221 
222 /*
223  * Updates the WM_WINDOW_ROLE
224  *
225  */
226 void window_update_role(i3Window *win, xcb_get_property_reply_t *prop, bool before_mgmt) {
227  if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
228  DLOG("WM_WINDOW_ROLE not set.\n");
229  FREE(prop);
230  return;
231  }
232 
233  char *new_role;
234  if (asprintf(&new_role, "%.*s", xcb_get_property_value_length(prop),
235  (char*)xcb_get_property_value(prop)) == -1) {
236  perror("asprintf()");
237  DLOG("Could not get WM_WINDOW_ROLE\n");
238  free(prop);
239  return;
240  }
241  FREE(win->role);
242  win->role = new_role;
243  LOG("WM_WINDOW_ROLE changed to \"%s\"\n", win->role);
244 
245  if (before_mgmt) {
246  free(prop);
247  return;
248  }
249 
250  run_assignments(win);
251 
252  free(prop);
253 }
254 
255 /*
256  * Updates the WM_HINTS (we only care about the input focus handling part).
257  *
258  */
259 void window_update_hints(i3Window *win, xcb_get_property_reply_t *prop) {
260  if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
261  DLOG("WM_HINTS not set.\n");
262  FREE(prop);
263  return;
264  }
265 
266  xcb_icccm_wm_hints_t hints;
267 
268  if (!xcb_icccm_get_wm_hints_from_reply(&hints, prop)) {
269  DLOG("Could not get WM_HINTS\n");
270  free(prop);
271  return;
272  }
273 
274  win->doesnt_accept_focus = !hints.input;
275  LOG("WM_HINTS.input changed to \"%d\"\n", hints.input);
276 
277  free(prop);
278 }