2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
7 * window.c: Updates window attributes (X11 hints/properties).
13 * Frees an i3Window and all its members.
16 void window_free(i3Window *win) {
17 FREE(win->class_class);
18 FREE(win->class_instance);
19 i3string_free(win->name);
20 FREE(win->ran_assignments);
25 * Updates the WM_CLASS (consisting of the class and instance) for the
29 void window_update_class(i3Window *win, xcb_get_property_reply_t *prop, bool before_mgmt) {
30 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
31 DLOG("WM_CLASS not set.\n");
36 /* We cannot use asprintf here since this property contains two
37 * null-terminated strings (for compatibility reasons). Instead, we
38 * use strdup() on both strings */
39 const size_t prop_length = xcb_get_property_value_length(prop);
40 char *new_class = xcb_get_property_value(prop);
41 const size_t class_class_index = strnlen(new_class, prop_length) + 1;
43 FREE(win->class_instance);
44 FREE(win->class_class);
46 win->class_instance = sstrndup(new_class, prop_length);
47 if (class_class_index < prop_length)
48 win->class_class = sstrndup(new_class + class_class_index, prop_length - class_class_index);
50 win->class_class = NULL;
51 LOG("WM_CLASS changed to %s (instance), %s (class)\n",
52 win->class_instance, win->class_class);
61 * Updates the name by using _NET_WM_NAME (encoded in UTF-8) for the given
62 * window. Further updates using window_update_name_legacy will be ignored.
65 void window_update_name(i3Window *win, xcb_get_property_reply_t *prop, bool before_mgmt) {
66 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
67 DLOG("_NET_WM_NAME not specified, not changing\n");
72 i3string_free(win->name);
74 /* Truncate the name at the first zero byte. See #3515. */
75 const int len = xcb_get_property_value_length(prop);
76 char *name = sstrndup(xcb_get_property_value(prop), len);
77 win->name = i3string_from_utf8(name);
80 Con *con = con_by_window_id(win->id);
81 if (con != NULL && con->title_format != NULL) {
82 i3String *name = con_parse_title_format(con);
83 ewmh_update_visible_name(win->id, i3string_as_utf8(name));
86 win->name_x_changed = true;
87 LOG("_NET_WM_NAME changed to \"%s\"\n", i3string_as_utf8(win->name));
89 win->uses_net_wm_name = true;
98 * Updates the name by using WM_NAME (encoded in COMPOUND_TEXT). We do not
99 * touch what the client sends us but pass it to xcb_image_text_8. To get
100 * proper unicode rendering, the application has to use _NET_WM_NAME (see
101 * window_update_name()).
104 void window_update_name_legacy(i3Window *win, xcb_get_property_reply_t *prop, bool before_mgmt) {
105 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
106 DLOG("WM_NAME not set (_NET_WM_NAME is what you want anyways).\n");
111 /* ignore update when the window is known to already have a UTF-8 name */
112 if (win->uses_net_wm_name) {
117 i3string_free(win->name);
118 const int len = xcb_get_property_value_length(prop);
119 char *name = sstrndup(xcb_get_property_value(prop), len);
120 win->name = i3string_from_utf8(name);
123 Con *con = con_by_window_id(win->id);
124 if (con != NULL && con->title_format != NULL) {
125 i3String *name = con_parse_title_format(con);
126 ewmh_update_visible_name(win->id, i3string_as_utf8(name));
130 LOG("WM_NAME changed to \"%s\"\n", i3string_as_utf8(win->name));
131 LOG("Using legacy window title. Note that in order to get Unicode window "
132 "titles in i3, the application has to set _NET_WM_NAME (UTF-8)\n");
134 win->name_x_changed = true;
138 run_assignments(win);
143 * Updates the CLIENT_LEADER (logical parent window).
146 void window_update_leader(i3Window *win, xcb_get_property_reply_t *prop) {
147 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
148 DLOG("CLIENT_LEADER not set on window 0x%08x.\n", win->id);
149 win->leader = XCB_NONE;
154 xcb_window_t *leader = xcb_get_property_value(prop);
155 if (leader == NULL) {
160 DLOG("Client leader changed to %08x\n", *leader);
162 win->leader = *leader;
168 * Updates the TRANSIENT_FOR (logical parent window).
171 void window_update_transient_for(i3Window *win, xcb_get_property_reply_t *prop) {
172 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
173 DLOG("TRANSIENT_FOR not set on window 0x%08x.\n", win->id);
174 win->transient_for = XCB_NONE;
179 xcb_window_t transient_for;
180 if (!xcb_icccm_get_wm_transient_for_from_reply(&transient_for, prop)) {
185 DLOG("Transient for changed to 0x%08x (window 0x%08x)\n", transient_for, win->id);
187 win->transient_for = transient_for;
193 * Updates the _NET_WM_STRUT_PARTIAL (reserved pixels at the screen edges)
196 void window_update_strut_partial(i3Window *win, xcb_get_property_reply_t *prop) {
197 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
198 DLOG("_NET_WM_STRUT_PARTIAL not set.\n");
204 if (!(strut = xcb_get_property_value(prop))) {
209 DLOG("Reserved pixels changed to: left = %d, right = %d, top = %d, bottom = %d\n",
210 strut[0], strut[1], strut[2], strut[3]);
212 win->reserved = (struct reservedpx){strut[0], strut[1], strut[2], strut[3]};
218 * Updates the WM_WINDOW_ROLE
221 void window_update_role(i3Window *win, xcb_get_property_reply_t *prop, bool before_mgmt) {
222 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
223 DLOG("WM_WINDOW_ROLE not set.\n");
229 sasprintf(&new_role, "%.*s", xcb_get_property_value_length(prop),
230 (char *)xcb_get_property_value(prop));
232 win->role = new_role;
233 LOG("WM_WINDOW_ROLE changed to \"%s\"\n", win->role);
237 run_assignments(win);
242 * Updates the _NET_WM_WINDOW_TYPE property.
245 void window_update_type(i3Window *window, xcb_get_property_reply_t *reply) {
246 xcb_atom_t new_type = xcb_get_preferred_window_type(reply);
248 if (new_type == XCB_NONE) {
249 DLOG("cannot read _NET_WM_WINDOW_TYPE from window.\n");
253 window->window_type = new_type;
254 LOG("_NET_WM_WINDOW_TYPE changed to %i.\n", window->window_type);
256 run_assignments(window);
260 * Updates the WM_NORMAL_HINTS
263 bool window_update_normal_hints(i3Window *win, xcb_get_property_reply_t *reply, xcb_get_geometry_reply_t *geom) {
264 bool changed = false;
265 xcb_size_hints_t size_hints;
267 /* If the hints were already in this event, use them, if not, request them */
270 success = xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
272 success = xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, win->id), &size_hints, NULL);
275 DLOG("Could not get WM_NORMAL_HINTS\n");
279 #define ASSIGN_IF_CHANGED(original, new) \
281 if (original != new) { \
287 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
288 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
290 ASSIGN_IF_CHANGED(win->min_width, size_hints.min_width);
291 ASSIGN_IF_CHANGED(win->min_height, size_hints.min_height);
294 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MAX_SIZE)) {
295 DLOG("Maximum size: %d (width) x %d (height)\n", size_hints.max_width, size_hints.max_height);
297 int max_width = max(0, size_hints.max_width);
298 int max_height = max(0, size_hints.max_height);
300 ASSIGN_IF_CHANGED(win->max_width, max_width);
301 ASSIGN_IF_CHANGED(win->max_height, max_height);
303 DLOG("Clearing maximum size \n");
305 ASSIGN_IF_CHANGED(win->max_width, 0);
306 ASSIGN_IF_CHANGED(win->max_height, 0);
309 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
310 DLOG("Size increments: %d (width) x %d (height)\n", size_hints.width_inc, size_hints.height_inc);
312 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF) {
313 ASSIGN_IF_CHANGED(win->width_increment, size_hints.width_inc);
315 ASSIGN_IF_CHANGED(win->width_increment, 0);
318 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF) {
319 ASSIGN_IF_CHANGED(win->height_increment, size_hints.height_inc);
321 ASSIGN_IF_CHANGED(win->height_increment, 0);
324 DLOG("Clearing size increments\n");
326 ASSIGN_IF_CHANGED(win->width_increment, 0);
327 ASSIGN_IF_CHANGED(win->height_increment, 0);
330 /* The base width / height is the desired size of the window. */
331 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE &&
332 (win->base_width >= 0) && (win->base_height >= 0)) {
333 DLOG("Base size: %d (width) x %d (height)\n", size_hints.base_width, size_hints.base_height);
335 ASSIGN_IF_CHANGED(win->base_width, size_hints.base_width);
336 ASSIGN_IF_CHANGED(win->base_height, size_hints.base_height);
338 DLOG("Clearing base size\n");
340 ASSIGN_IF_CHANGED(win->base_width, 0);
341 ASSIGN_IF_CHANGED(win->base_height, 0);
345 (size_hints.flags & XCB_ICCCM_SIZE_HINT_US_POSITION || size_hints.flags & XCB_ICCCM_SIZE_HINT_P_POSITION) &&
346 (size_hints.flags & XCB_ICCCM_SIZE_HINT_US_SIZE || size_hints.flags & XCB_ICCCM_SIZE_HINT_P_SIZE)) {
347 DLOG("Setting geometry x=%d y=%d w=%d h=%d\n", size_hints.x, size_hints.y, size_hints.width, size_hints.height);
348 geom->x = size_hints.x;
349 geom->y = size_hints.y;
350 geom->width = size_hints.width;
351 geom->height = size_hints.height;
354 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
355 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT &&
356 (size_hints.min_aspect_num >= 0) && (size_hints.min_aspect_den > 0) &&
357 (size_hints.max_aspect_num >= 0) && (size_hints.max_aspect_den > 0)) {
358 /* Convert numerator/denominator to a double */
359 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
360 double max_aspect = (double)size_hints.max_aspect_num / size_hints.max_aspect_den;
361 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
362 if (fabs(win->min_aspect_ratio - min_aspect) > DBL_EPSILON) {
363 win->min_aspect_ratio = min_aspect;
366 if (fabs(win->max_aspect_ratio - max_aspect) > DBL_EPSILON) {
367 win->max_aspect_ratio = max_aspect;
371 DLOG("Clearing aspect ratios\n");
373 ASSIGN_IF_CHANGED(win->min_aspect_ratio, 0.0);
374 ASSIGN_IF_CHANGED(win->max_aspect_ratio, 0.0);
381 * Updates the WM_HINTS (we only care about the input focus handling part).
384 void window_update_hints(i3Window *win, xcb_get_property_reply_t *prop, bool *urgency_hint) {
385 if (urgency_hint != NULL)
386 *urgency_hint = false;
388 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
389 DLOG("WM_HINTS not set.\n");
394 xcb_icccm_wm_hints_t hints;
396 if (!xcb_icccm_get_wm_hints_from_reply(&hints, prop)) {
397 DLOG("Could not get WM_HINTS\n");
402 if (hints.flags & XCB_ICCCM_WM_HINT_INPUT) {
403 win->doesnt_accept_focus = !hints.input;
404 LOG("WM_HINTS.input changed to \"%d\"\n", hints.input);
407 if (urgency_hint != NULL)
408 *urgency_hint = (xcb_icccm_wm_hints_get_urgency(&hints) != 0);
414 * Updates the MOTIF_WM_HINTS. The container's border style should be set to
415 * `motif_border_style' if border style is not BS_NORMAL.
417 * i3 only uses this hint when it specifies a window should have no
418 * title bar, or no decorations at all, which is how most window managers
421 * The EWMH spec intended to replace Motif hints with _NET_WM_WINDOW_TYPE, but
422 * it is still in use by popular widget toolkits such as GTK+ and Java AWT.
425 void window_update_motif_hints(i3Window *win, xcb_get_property_reply_t *prop, border_style_t *motif_border_style) {
426 /* This implementation simply mirrors Gnome's Metacity. Official
427 * documentation of this hint is nowhere to be found.
428 * For more information see:
429 * https://people.gnome.org/~tthurman/docs/metacity/xprops_8h-source.html
430 * https://stackoverflow.com/questions/13787553/detect-if-a-x11-window-has-decorations
432 #define MWM_HINTS_FLAGS_FIELD 0
433 #define MWM_HINTS_DECORATIONS_FIELD 2
435 #define MWM_HINTS_DECORATIONS (1 << 1)
436 #define MWM_DECOR_ALL (1 << 0)
437 #define MWM_DECOR_BORDER (1 << 1)
438 #define MWM_DECOR_TITLE (1 << 3)
440 if (motif_border_style != NULL)
441 *motif_border_style = BS_NORMAL;
443 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
448 /* The property consists of an array of 5 uint32_t's. The first value is a
449 * bit mask of what properties the hint will specify. We are only interested
450 * in MWM_HINTS_DECORATIONS because it indicates that the third value of the
451 * array tells us which decorations the window should have, each flag being
452 * a particular decoration. Notice that X11 (Xlib) often mentions 32-bit
453 * fields which in reality are implemented using unsigned long variables
454 * (64-bits long on amd64 for example). On the other hand,
455 * xcb_get_property_value() behaves strictly according to documentation,
456 * i.e. returns 32-bit data fields. */
457 uint32_t *motif_hints = (uint32_t *)xcb_get_property_value(prop);
459 if (motif_border_style != NULL &&
460 motif_hints[MWM_HINTS_FLAGS_FIELD] & MWM_HINTS_DECORATIONS) {
461 if (motif_hints[MWM_HINTS_DECORATIONS_FIELD] & MWM_DECOR_ALL ||
462 motif_hints[MWM_HINTS_DECORATIONS_FIELD] & MWM_DECOR_TITLE)
463 *motif_border_style = BS_NORMAL;
464 else if (motif_hints[MWM_HINTS_DECORATIONS_FIELD] & MWM_DECOR_BORDER)
465 *motif_border_style = BS_PIXEL;
467 *motif_border_style = BS_NONE;
472 #undef MWM_HINTS_FLAGS_FIELD
473 #undef MWM_HINTS_DECORATIONS_FIELD
474 #undef MWM_HINTS_DECORATIONS
476 #undef MWM_DECOR_BORDER
477 #undef MWM_DECOR_TITLE