2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2010 Michael Stapelberg and contributors (see also: LICENSE)
11 #include <xcb/randr.h>
13 #include <X11/XKBlib.h>
19 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
20 since it’d trigger an infinite loop of switching between the different windows when
21 changing workspaces */
22 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
24 void add_ignore_event(const int sequence, const int response_type) {
25 struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
27 event->sequence = sequence;
28 event->response_type = response_type;
29 event->added = time(NULL);
31 SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
35 * Checks if the given sequence is ignored and returns true if so.
38 static bool event_is_ignored(const int sequence, const int response_type) {
39 struct Ignore_Event *event;
40 time_t now = time(NULL);
41 for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
42 if ((now - event->added) > 5) {
43 struct Ignore_Event *save = event;
44 event = SLIST_NEXT(event, ignore_events);
45 SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
47 } else event = SLIST_NEXT(event, ignore_events);
50 SLIST_FOREACH(event, &ignore_events, ignore_events) {
51 if (event->sequence != sequence)
54 if (event->response_type != 0 &&
55 event->response_type != response_type)
58 /* instead of removing a sequence number we better wait until it gets
59 * garbage collected. it may generate multiple events (there are multiple
60 * enter_notifies for one configure_request, for example). */
61 //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
71 * There was a key press. We compare this key code with our bindings table and pass
72 * the bound action to parse_command().
75 static int handle_key_press(xcb_key_press_event_t *event) {
76 DLOG("Keypress %d, state raw = %d\n", event->detail, event->state);
78 /* Remove the numlock bit, all other bits are modifiers we can bind to */
79 uint16_t state_filtered = event->state & ~(xcb_numlock_mask | XCB_MOD_MASK_LOCK);
80 DLOG("(removed numlock, state = %d)\n", state_filtered);
81 /* Only use the lower 8 bits of the state (modifier masks) so that mouse
82 * button masks are filtered out */
83 state_filtered &= 0xFF;
84 DLOG("(removed upper 8 bits, state = %d)\n", state_filtered);
86 if (xkb_current_group == XkbGroup2Index)
87 state_filtered |= BIND_MODE_SWITCH;
89 DLOG("(checked mode_switch, state %d)\n", state_filtered);
91 /* Find the binding */
92 Binding *bind = get_binding(state_filtered, event->detail);
94 /* No match? Then the user has Mode_switch enabled but does not have a
95 * specific keybinding. Fall back to the default keybindings (without
96 * Mode_switch). Makes it much more convenient for users of a hybrid
97 * layout (like us, ru). */
99 state_filtered &= ~(BIND_MODE_SWITCH);
100 DLOG("no match, new state_filtered = %d\n", state_filtered);
101 if ((bind = get_binding(state_filtered, event->detail)) == NULL) {
102 ELOG("Could not lookup key binding (modifiers %d, keycode %d)\n",
103 state_filtered, event->detail);
108 parse_cmd(bind->command);
114 * Called with coordinates of an enter_notify event or motion_notify event
115 * to check if the user crossed virtual screen boundaries and adjust the
116 * current workspace, if so.
119 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
122 /* If the user disable focus follows mouse, we have nothing to do here */
123 if (config.disable_focus_follows_mouse)
126 if ((output = get_output_containing(x, y)) == NULL) {
127 ELOG("ERROR: No such screen\n");
131 if (output->con == NULL) {
132 ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
136 /* Focus the output on which the user moved his cursor */
137 Con *old_focused = focused;
138 con_focus(con_descend_focused(output_get_content(output->con)));
140 /* If the focus changed, we re-render to get updated decorations */
141 if (old_focused != focused)
146 * When the user moves the mouse pointer onto a window, this callback gets called.
149 static int handle_enter_notify(xcb_enter_notify_event_t *event) {
152 DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
153 event->event, event->mode, event->detail, event->sequence);
154 DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
155 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
156 DLOG("This was not a normal notify, ignoring\n");
159 /* Some events are not interesting, because they were not generated
160 * actively by the user, but by reconfiguration of windows */
161 if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
162 DLOG("Event ignored\n");
166 bool enter_child = false;
167 /* Get container by frame or by child window */
168 if ((con = con_by_frame_id(event->event)) == NULL) {
169 con = con_by_window_id(event->event);
173 /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
175 DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
176 check_crossing_screen_boundary(event->root_x, event->root_y);
180 if (con->parent->type == CT_DOCKAREA) {
181 DLOG("Ignoring, this is a dock client\n");
185 /* see if the user entered the window on a certain window decoration */
186 int layout = (enter_child ? con->parent->layout : con->layout);
187 if (layout == L_DEFAULT) {
189 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
190 if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
191 LOG("using child %p / %s instead!\n", child, child->name);
198 if (client->workspace != c_ws && client->workspace->output == c_ws->output) {
199 /* This can happen when a client gets assigned to a different workspace than
200 * the current one (see src/mainx.c:reparent_window). Shortly after it was created,
201 * an enter_notify will follow. */
202 DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
207 if (config.disable_focus_follows_mouse)
210 con_focus(con_descend_focused(con));
217 * When the user moves the mouse but does not change the active window
218 * (e.g. when having no windows opened but moving mouse on the root screen
219 * and crossing virtual screen boundaries), this callback gets called.
222 static int handle_motion_notify(xcb_motion_notify_event_t *event) {
223 /* Skip events where the pointer was over a child window, we are only
224 * interested in events on the root window. */
225 if (event->child != 0)
229 if ((con = con_by_frame_id(event->event)) == NULL) {
230 check_crossing_screen_boundary(event->root_x, event->root_y);
234 if (config.disable_focus_follows_mouse)
237 if (con->layout != L_DEFAULT)
240 /* see over which rect the user is */
242 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
243 if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
246 /* We found the rect, let’s see if this window is focused */
247 if (TAILQ_FIRST(&(con->focus_head)) == current)
251 x_push_changes(croot);
259 * Called when the keyboard mapping changes (for example by using Xmodmap),
260 * we need to update our key bindings then (re-translate symbols).
263 static int handle_mapping_notify(xcb_mapping_notify_event_t *event) {
264 if (event->request != XCB_MAPPING_KEYBOARD &&
265 event->request != XCB_MAPPING_MODIFIER)
268 DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
269 xcb_refresh_keyboard_mapping(keysyms, event);
271 xcb_get_numlock_mask(conn);
273 ungrab_all_keys(conn);
275 grab_all_keys(conn, false);
281 * A new window appeared on the screen (=was mapped), so let’s manage it.
284 static int handle_map_request(xcb_map_request_event_t *event) {
285 xcb_get_window_attributes_cookie_t cookie;
287 cookie = xcb_get_window_attributes_unchecked(conn, event->window);
289 DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
290 add_ignore_event(event->sequence, 0);
292 manage_window(event->window, cookie, false);
293 x_push_changes(croot);
298 * Configure requests are received when the application wants to resize windows on their own.
300 * We generate a synthethic configure notify event to signalize the client its "new" position.
303 static int handle_configure_request(xcb_configure_request_event_t *event) {
306 DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
307 event->window, event->x, event->y, event->width, event->height);
309 /* For unmanaged windows, we just execute the configure request. As soon as
310 * it gets mapped, we will take over anyways. */
311 if ((con = con_by_window_id(event->window)) == NULL) {
312 DLOG("Configure request for unmanaged window, can do that.\n");
317 #define COPY_MASK_MEMBER(mask_member, event_member) do { \
318 if (event->value_mask & mask_member) { \
319 mask |= mask_member; \
320 values[c++] = event->event_member; \
324 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
325 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
326 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
327 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
328 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
329 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
330 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
332 xcb_configure_window(conn, event->window, mask, values);
338 DLOG("Configure request!\n");
339 if (con_is_floating(con) && con_is_leaf(con)) {
340 /* find the height for the decorations */
341 int deco_height = config.font.height + 5;
342 /* we actually need to apply the size/position changes to the *parent*
344 Rect bsr = con_border_style_rect(con);
345 if (con->border_style == BS_NORMAL) {
346 bsr.y += deco_height;
347 bsr.height -= deco_height;
350 DLOG("Container is a floating leaf node, will do that.\n");
351 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
352 con->rect.x = event->x + (-1) * bsr.x;
353 DLOG("proposed x = %d, new x is %d\n", event->x, con->rect.x);
355 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
356 con->rect.y = event->y + (-1) * bsr.y;
357 DLOG("proposed y = %d, new y is %d\n", event->y, con->rect.y);
359 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
360 con->rect.width = event->width + (-1) * bsr.width;
361 DLOG("proposed width = %d, new width is %d\n", event->width, con->rect.width);
363 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
364 con->rect.height = event->height + (-1) * bsr.height;
365 DLOG("proposed height = %d, new height is %d\n", event->height, con->rect.height);
370 fake_absolute_configure_notify(con);
374 /* Dock clients can be reconfigured in their height */
376 DLOG("Reconfiguring height of this dock client\n");
378 if (!(event->value_mask & XCB_CONFIG_WINDOW_HEIGHT)) {
379 DLOG("Ignoring configure request, no height given\n");
383 client->desired_height = event->height;
384 render_workspace(conn, c_ws->output, c_ws);
390 if (client->fullscreen) {
391 DLOG("Client is in fullscreen mode\n");
393 Rect child_rect = client->container->workspace->rect;
394 child_rect.x = child_rect.y = 0;
395 fake_configure_notify(conn, child_rect, client->child);
400 fake_absolute_configure_notify(conn, client);
408 * Configuration notifies are only handled because we need to set up ignore for
409 * the following enter notify events.
412 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
413 DLOG("configure_event, sequence %d\n", event->sequence);
414 /* We ignore this sequence twice because events for child and frame should be ignored */
415 add_ignore_event(event->sequence);
416 add_ignore_event(event->sequence);
423 * Gets triggered upon a RandR screen change event, that is when the user
424 * changes the screen configuration in any way (mode, position, …)
427 static int handle_screen_change(xcb_generic_event_t *e) {
428 DLOG("RandR screen change\n");
430 randr_query_outputs();
432 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
438 * Our window decorations were unmapped. That means, the window will be killed
439 * now, so we better clean up before.
442 static int handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
443 /* we need to ignore EnterNotify events which will be generated because a
444 * different window is visible now */
445 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
447 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
448 Con *con = con_by_window_id(event->window);
450 /* This could also be an UnmapNotify for the frame. We need to
451 * decrement the ignore_unmap counter. */
452 con = con_by_frame_id(event->window);
454 LOG("Not a managed window, ignoring UnmapNotify event\n");
457 if (con->ignore_unmap > 0)
459 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
463 if (con->ignore_unmap > 0) {
464 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
469 tree_close(con, DONT_KILL_WINDOW, false);
471 x_push_changes(croot);
475 if (client == NULL) {
476 DLOG("not a managed window. Ignoring.\n");
478 /* This was most likely the destroyed frame of a client which is
479 * currently being unmapped, so we add this sequence (again!) to
480 * the ignore list (enter_notify events will get sent for both,
481 * the child and its frame). */
482 add_ignore_event(event->sequence);
490 /* Let’s see how many clients there are left on the workspace to delete it if it’s empty */
491 bool workspace_empty = SLIST_EMPTY(&(client->workspace->focus_stack));
492 bool workspace_focused = (c_ws == client->workspace);
493 Client *to_focus = (!workspace_empty ? SLIST_FIRST(&(client->workspace->focus_stack)) : NULL);
495 /* If this workspace is currently visible, we don’t delete it */
496 if (workspace_is_visible(client->workspace))
497 workspace_empty = false;
499 if (workspace_empty) {
500 client->workspace->output = NULL;
501 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
504 /* Remove the urgency flag if set */
505 client->urgent = false;
506 workspace_update_urgent_flag(client->workspace);
515 * A destroy notify event is sent when the window is not unmapped, but
516 * immediately destroyed (for example when starting a window and immediately
517 * killing the program which started it).
519 * We just pass on the event to the unmap notify handler (by copying the
520 * important fields in the event data structure).
523 static int handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
524 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
526 xcb_unmap_notify_event_t unmap;
527 unmap.sequence = event->sequence;
528 unmap.event = event->event;
529 unmap.window = event->window;
531 return handle_unmap_notify_event(&unmap);
535 * Called when a window changes its title
538 static int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
539 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
541 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
544 window_update_name(con->window, prop);
546 x_push_changes(croot);
552 * Handles legacy window name updates (WM_NAME), see also src/window.c,
553 * window_update_name_legacy().
556 static int handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
557 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
559 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
562 window_update_name_legacy(con->window, prop);
564 x_push_changes(croot);
570 * Updates the client’s WM_CLASS property
573 static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
574 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
576 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
579 window_update_class(con->window, prop);
585 * Expose event means we should redraw our windows (= title bar)
588 static int handle_expose_event(xcb_expose_event_t *event) {
591 /* event->count is the number of minimum remaining expose events for this
592 * window, so we skip all events but the last one */
593 if (event->count != 0)
596 DLOG("window = %08x\n", event->window);
598 if ((parent = con_by_frame_id(event->window)) == NULL) {
599 LOG("expose event for unknown window, ignoring\n");
604 x_draw_decoration(parent);
606 TAILQ_FOREACH(con, &(parent->nodes_head), nodes) {
607 DLOG("expose for con %p / %s\n", con, con->name);
609 x_draw_decoration(con);
612 /* We also need to render the decorations of other Cons nearby the Con
613 * itself to not get overlapping decorations */
614 TAILQ_FOREACH(con, &(parent->parent->nodes_head), nodes) {
615 DLOG("expose for con %p / %s\n", con, con->name);
617 x_draw_decoration(con);
625 * Handle client messages (EWMH)
628 static int handle_client_message(xcb_client_message_event_t *event) {
629 LOG("ClientMessage for window 0x%08x\n", event->window);
630 if (event->type == A__NET_WM_STATE) {
631 if (event->format != 32 || event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN) {
632 DLOG("atom in clientmessage is %d, fullscreen is %d\n",
633 event->data.data32[1], A__NET_WM_STATE_FULLSCREEN);
634 DLOG("not about fullscreen atom\n");
638 Con *con = con_by_window_id(event->window);
640 DLOG("Could not get window for client message\n");
644 /* Check if the fullscreen state should be toggled */
645 if ((con->fullscreen_mode != CF_NONE &&
646 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
647 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
648 (con->fullscreen_mode == CF_NONE &&
649 (event->data.data32[0] == _NET_WM_STATE_ADD ||
650 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
651 DLOG("toggling fullscreen\n");
652 con_toggle_fullscreen(con);
656 x_push_changes(croot);
658 ELOG("unhandled clientmessage\n");
666 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
667 xcb_atom_t atom, xcb_get_property_reply_t *property) {
668 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
669 before changing this property. */
670 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
676 * Handles the size hints set by a window, but currently only the part necessary for displaying
677 * clients proportionally inside their frames (mplayer for example)
679 * See ICCCM 4.1.2.3 for more details
682 static int handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
683 xcb_atom_t name, xcb_get_property_reply_t *reply) {
684 Con *con = con_by_window_id(window);
686 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
690 xcb_size_hints_t size_hints;
692 //CLIENT_LOG(client);
694 /* If the hints were already in this event, use them, if not, request them */
696 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
698 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
700 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
701 // TODO: Minimum size is not yet implemented
702 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
705 bool changed = false;
706 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
707 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
708 if (con->width_increment != size_hints.width_inc) {
709 con->width_increment = size_hints.width_inc;
712 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
713 if (con->height_increment != size_hints.height_inc) {
714 con->height_increment = size_hints.height_inc;
719 DLOG("resize increments changed\n");
722 int base_width = 0, base_height = 0;
724 /* base_width/height are the desired size of the window.
725 We check if either the program-specified size or the program-specified
726 min-size is available */
727 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
728 base_width = size_hints.base_width;
729 base_height = size_hints.base_height;
730 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
731 /* TODO: is this right? icccm says not */
732 base_width = size_hints.min_width;
733 base_height = size_hints.min_height;
736 if (base_width != con->base_width ||
737 base_height != con->base_height) {
738 con->base_width = base_width;
739 con->base_height = base_height;
740 DLOG("client's base_height changed to %d\n", base_height);
741 DLOG("client's base_width changed to %d\n", base_width);
744 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
745 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
746 (size_hints.min_aspect_num <= 0) ||
747 (size_hints.min_aspect_den <= 0)) {
748 goto render_and_return;
751 /* XXX: do we really use rect here, not window_rect? */
752 double width = con->rect.width - base_width;
753 double height = con->rect.height - base_height;
754 /* Convert numerator/denominator to a double */
755 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
756 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
758 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
759 DLOG("width = %f, height = %f\n", width, height);
761 /* Sanity checks, this is user-input, in a way */
762 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
763 goto render_and_return;
765 /* Check if we need to set proportional_* variables using the correct ratio */
766 if ((width / height) < min_aspect) {
767 con->proportional_width = width;
768 con->proportional_height = width / min_aspect;
769 } else if ((width / height) > max_aspect) {
770 con->proportional_width = width;
771 con->proportional_height = width / max_aspect;
772 } else goto render_and_return;
780 * Handles the WM_HINTS property for extracting the urgency state of the window.
783 static int handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
784 xcb_atom_t name, xcb_get_property_reply_t *reply) {
785 Con *con = con_by_window_id(window);
787 DLOG("Received WM_HINTS for unknown client\n");
791 xcb_icccm_wm_hints_t hints;
794 if (!xcb_icccm_get_wm_hints_from_reply(&hints, reply))
797 if (!xcb_icccm_get_wm_hints_reply(conn, xcb_icccm_get_wm_hints_unchecked(conn, con->window->id), &hints, NULL))
801 if (!con->urgent && focused == con) {
802 DLOG("Ignoring urgency flag for current client\n");
806 /* Update the flag on the client directly */
807 con->urgent = (xcb_icccm_wm_hints_get_urgency(&hints) != 0);
809 LOG("Urgency flag changed to %d\n", con->urgent);
812 /* Set the urgency flag on the workspace, if a workspace could be found
813 * (for dock clients, that is not the case). */
814 if ((ws = con_get_workspace(con)) != NULL)
815 workspace_update_urgent_flag(ws);
820 /* If the workspace this client is on is not visible, we need to redraw
821 * the workspace bar */
822 if (!workspace_is_visible(client->workspace)) {
823 Output *output = client->workspace->output;
824 render_workspace(conn, output, output->current_workspace);
833 * Handles the transient for hints set by a window, signalizing that this window is a popup window
834 * for some other window.
836 * See ICCCM 4.1.2.6 for more details
839 static int handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
840 xcb_atom_t name, xcb_get_property_reply_t *prop) {
843 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
844 DLOG("No such window\n");
849 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
850 false, window, A_WM_TRANSIENT_FOR, A_WINDOW, 0, 32), NULL);
855 window_update_transient_for(con->window, prop);
857 // TODO: put window in floating mode if con->window->transient_for != XCB_NONE:
859 if (client->floating == FLOATING_AUTO_OFF) {
860 DLOG("This is a popup window, putting into floating\n");
861 toggle_floating_mode(conn, client, true);
869 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
870 * toolwindow (or similar) and to which window it belongs (logical parent).
873 static int handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
874 xcb_atom_t name, xcb_get_property_reply_t *prop) {
876 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
880 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
881 false, window, A_WM_CLIENT_LEADER, A_WINDOW, 0, 32), NULL);
886 window_update_leader(con->window, prop);
892 * Handles FocusIn events which are generated by clients (i3’s focus changes
893 * don’t generate FocusIn events due to a different EventMask) and updates the
894 * decorations accordingly.
897 static int handle_focus_in(xcb_focus_in_event_t *event) {
898 DLOG("focus change in, for window 0x%08x\n", event->event);
900 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
902 DLOG("That is con %p / %s\n", con, con->name);
904 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
905 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
906 DLOG("FocusIn event for grab/ungrab, ignoring\n");
910 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
911 DLOG("notify detail is pointer, ignoring this event\n");
915 if (focused_id == event->event) {
916 DLOG("focus matches the currently focused window, not doing anything\n");
920 DLOG("focus is different, updating decorations\n");
922 /* We update focused_id because we don’t need to set focus again */
923 focused_id = event->event;
924 x_push_changes(croot);
928 typedef int (*cb_property_handler_t)(void *data, xcb_connection_t *c, uint8_t state, xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *property);
930 struct property_handler_t {
933 cb_property_handler_t cb;
936 static struct property_handler_t property_handlers[] = {
937 { 0, 128, handle_windowname_change },
938 { 0, UINT_MAX, handle_hints },
939 { 0, 128, handle_windowname_change_legacy },
940 { 0, UINT_MAX, handle_normal_hints },
941 { 0, UINT_MAX, handle_clientleader_change },
942 { 0, UINT_MAX, handle_transient_for }
944 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
947 * Sets the appropriate atoms for the property handlers after the atoms were
951 void property_handlers_init() {
952 property_handlers[0].atom = A__NET_WM_NAME;
953 property_handlers[1].atom = A_WM_HINTS;
954 property_handlers[2].atom = A_WM_NAME;
955 property_handlers[3].atom = A_WM_NORMAL_HINTS;
956 property_handlers[4].atom = A_WM_CLIENT_LEADER;
957 property_handlers[5].atom = A_WM_TRANSIENT_FOR;
960 static int property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
961 struct property_handler_t *handler = NULL;
962 xcb_get_property_reply_t *propr = NULL;
965 for (int c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
966 if (property_handlers[c].atom != atom)
969 handler = &property_handlers[c];
973 if (handler == NULL) {
974 DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
978 if (state != XCB_PROPERTY_DELETE) {
979 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
980 propr = xcb_get_property_reply(conn, cookie, 0);
983 ret = handler->cb(NULL, conn, state, window, atom, propr);
989 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
993 void handle_event(int type, xcb_generic_event_t *event) {
994 if (randr_base > -1 &&
995 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
996 handle_screen_change(event);
1002 handle_key_press((xcb_key_press_event_t*)event);
1005 case XCB_BUTTON_PRESS:
1006 handle_button_press((xcb_button_press_event_t*)event);
1009 case XCB_MAP_REQUEST:
1010 handle_map_request((xcb_map_request_event_t*)event);
1013 case XCB_UNMAP_NOTIFY:
1014 handle_unmap_notify_event((xcb_unmap_notify_event_t*)event);
1017 case XCB_DESTROY_NOTIFY:
1018 handle_destroy_notify_event((xcb_destroy_notify_event_t*)event);
1022 handle_expose_event((xcb_expose_event_t*)event);
1025 case XCB_MOTION_NOTIFY:
1026 handle_motion_notify((xcb_motion_notify_event_t*)event);
1029 /* Enter window = user moved his mouse over the window */
1030 case XCB_ENTER_NOTIFY:
1031 handle_enter_notify((xcb_enter_notify_event_t*)event);
1034 /* Client message are sent to the root window. The only interesting
1035 * client message for us is _NET_WM_STATE, we honour
1036 * _NET_WM_STATE_FULLSCREEN */
1037 case XCB_CLIENT_MESSAGE:
1038 handle_client_message((xcb_client_message_event_t*)event);
1041 /* Configure request = window tried to change size on its own */
1042 case XCB_CONFIGURE_REQUEST:
1043 handle_configure_request((xcb_configure_request_event_t*)event);
1046 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1047 case XCB_MAPPING_NOTIFY:
1048 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
1052 handle_focus_in((xcb_focus_in_event_t*)event);
1055 case XCB_PROPERTY_NOTIFY:
1056 DLOG("Property notify\n");
1057 xcb_property_notify_event_t *e = (xcb_property_notify_event_t*)event;
1058 property_notify(e->state, e->window, e->atom);
1062 DLOG("Unhandled event of type %d\n", type);