2 #define I3__FILE__ "handlers.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009 Michael Stapelberg and contributors (see also: LICENSE)
9 * handlers.c: Small handlers for various events (keypresses, focus changes,
18 #include <xcb/randr.h>
19 #define SN_API_NOT_YET_FROZEN 1
20 #include <libsn/sn-monitor.h>
24 int xkb_current_group;
26 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
27 since it’d trigger an infinite loop of switching between the different windows when
28 changing workspaces */
29 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
32 * Adds the given sequence to the list of events which are ignored.
33 * If this ignore should only affect a specific response_type, pass
34 * response_type, otherwise, pass -1.
36 * Every ignored sequence number gets garbage collected after 5 seconds.
39 void add_ignore_event(const int sequence, const int response_type) {
40 struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
42 event->sequence = sequence;
43 event->response_type = response_type;
44 event->added = time(NULL);
46 SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
50 * Checks if the given sequence is ignored and returns true if so.
53 bool event_is_ignored(const int sequence, const int response_type) {
54 struct Ignore_Event *event;
55 time_t now = time(NULL);
56 for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
57 if ((now - event->added) > 5) {
58 struct Ignore_Event *save = event;
59 event = SLIST_NEXT(event, ignore_events);
60 SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
63 event = SLIST_NEXT(event, ignore_events);
66 SLIST_FOREACH(event, &ignore_events, ignore_events) {
67 if (event->sequence != sequence)
70 if (event->response_type != -1 &&
71 event->response_type != response_type)
74 /* instead of removing a sequence number we better wait until it gets
75 * garbage collected. it may generate multiple events (there are multiple
76 * enter_notifies for one configure_request, for example). */
77 //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
86 * Called with coordinates of an enter_notify event or motion_notify event
87 * to check if the user crossed virtual screen boundaries and adjust the
88 * current workspace, if so.
91 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
94 /* If the user disable focus follows mouse, we have nothing to do here */
95 if (config.disable_focus_follows_mouse)
98 if ((output = get_output_containing(x, y)) == NULL) {
99 ELOG("ERROR: No such screen\n");
103 if (output->con == NULL) {
104 ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
108 /* Focus the output on which the user moved their cursor */
109 Con *old_focused = focused;
110 Con *next = con_descend_focused(output_get_content(output->con));
111 /* Since we are switching outputs, this *must* be a different workspace, so
112 * call workspace_show() */
113 workspace_show(con_get_workspace(next));
116 /* If the focus changed, we re-render to get updated decorations */
117 if (old_focused != focused)
122 * When the user moves the mouse pointer onto a window, this callback gets called.
125 static void handle_enter_notify(xcb_enter_notify_event_t *event) {
128 last_timestamp = event->time;
130 DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
131 event->event, event->mode, event->detail, event->sequence);
132 DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
133 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
134 DLOG("This was not a normal notify, ignoring\n");
137 /* Some events are not interesting, because they were not generated
138 * actively by the user, but by reconfiguration of windows */
139 if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
140 DLOG("Event ignored\n");
144 bool enter_child = false;
145 /* Get container by frame or by child window */
146 if ((con = con_by_frame_id(event->event)) == NULL) {
147 con = con_by_window_id(event->event);
151 /* If not, then the user moved their cursor to the root window. In that case, we adjust c_ws */
153 DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
154 check_crossing_screen_boundary(event->root_x, event->root_y);
158 if (con->parent->type == CT_DOCKAREA) {
159 DLOG("Ignoring, this is a dock client\n");
163 /* see if the user entered the window on a certain window decoration */
164 layout_t layout = (enter_child ? con->parent->layout : con->layout);
165 if (layout == L_DEFAULT) {
167 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
168 if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
169 LOG("using child %p / %s instead!\n", child, child->name);
175 if (config.disable_focus_follows_mouse)
178 /* if this container is already focused, there is nothing to do. */
182 /* Get the currently focused workspace to check if the focus change also
183 * involves changing workspaces. If so, we need to call workspace_show() to
184 * correctly update state and send the IPC event. */
185 Con *ws = con_get_workspace(con);
186 if (ws != con_get_workspace(focused))
189 focused_id = XCB_NONE;
190 con_focus(con_descend_focused(con));
197 * When the user moves the mouse but does not change the active window
198 * (e.g. when having no windows opened but moving mouse on the root screen
199 * and crossing virtual screen boundaries), this callback gets called.
202 static void handle_motion_notify(xcb_motion_notify_event_t *event) {
203 last_timestamp = event->time;
205 /* Skip events where the pointer was over a child window, we are only
206 * interested in events on the root window. */
207 if (event->child != XCB_NONE)
211 if ((con = con_by_frame_id(event->event)) == NULL) {
212 DLOG("MotionNotify for an unknown container, checking if it crosses screen boundaries.\n");
213 check_crossing_screen_boundary(event->root_x, event->root_y);
217 if (config.disable_focus_follows_mouse)
220 if (con->layout != L_DEFAULT && con->layout != L_SPLITV && con->layout != L_SPLITH)
223 /* see over which rect the user is */
225 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
226 if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
229 /* We found the rect, let’s see if this window is focused */
230 if (TAILQ_FIRST(&(con->focus_head)) == current)
234 x_push_changes(croot);
240 * Called when the keyboard mapping changes (for example by using Xmodmap),
241 * we need to update our key bindings then (re-translate symbols).
244 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
245 if (event->request != XCB_MAPPING_KEYBOARD &&
246 event->request != XCB_MAPPING_MODIFIER)
249 DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
250 xcb_refresh_keyboard_mapping(keysyms, event);
252 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
254 ungrab_all_keys(conn);
262 * A new window appeared on the screen (=was mapped), so let’s manage it.
265 static void handle_map_request(xcb_map_request_event_t *event) {
266 xcb_get_window_attributes_cookie_t cookie;
268 cookie = xcb_get_window_attributes_unchecked(conn, event->window);
270 DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
271 add_ignore_event(event->sequence, -1);
273 manage_window(event->window, cookie, false);
278 * Configure requests are received when the application wants to resize windows
281 * We generate a synthethic configure notify event to signalize the client its
285 static void handle_configure_request(xcb_configure_request_event_t *event) {
288 DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
289 event->window, event->x, event->y, event->width, event->height);
291 /* For unmanaged windows, we just execute the configure request. As soon as
292 * it gets mapped, we will take over anyways. */
293 if ((con = con_by_window_id(event->window)) == NULL) {
294 DLOG("Configure request for unmanaged window, can do that.\n");
299 #define COPY_MASK_MEMBER(mask_member, event_member) \
301 if (event->value_mask & mask_member) { \
302 mask |= mask_member; \
303 values[c++] = event->event_member; \
307 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
308 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
309 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
310 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
311 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
312 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
313 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
315 xcb_configure_window(conn, event->window, mask, values);
321 DLOG("Configure request!\n");
323 Con *workspace = con_get_workspace(con),
326 /* There might not be a corresponding workspace for dock cons, therefore we
327 * have to be careful here. */
329 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
331 fullscreen = con_get_fullscreen_con(workspace, CF_GLOBAL);
334 if (fullscreen != con && con_is_floating(con) && con_is_leaf(con)) {
335 /* find the height for the decorations */
336 int deco_height = con->deco_rect.height;
337 /* we actually need to apply the size/position changes to the *parent*
339 Rect bsr = con_border_style_rect(con);
340 if (con->border_style == BS_NORMAL) {
341 bsr.y += deco_height;
342 bsr.height -= deco_height;
344 Con *floatingcon = con->parent;
346 if (strcmp(con_get_workspace(floatingcon)->name, "__i3_scratch") == 0) {
347 DLOG("This is a scratchpad container, ignoring ConfigureRequest\n");
351 Rect newrect = floatingcon->rect;
353 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
354 newrect.x = event->x + (-1) * bsr.x;
355 DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
357 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
358 newrect.y = event->y + (-1) * bsr.y;
359 DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
361 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
362 newrect.width = event->width + (-1) * bsr.width;
363 newrect.width += con->border_width * 2;
364 DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
365 event->width, newrect.width, con->border_width);
367 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
368 newrect.height = event->height + (-1) * bsr.height;
369 newrect.height += con->border_width * 2;
370 DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
371 event->height, newrect.height, con->border_width);
374 DLOG("Container is a floating leaf node, will do that.\n");
375 floating_reposition(floatingcon, newrect);
379 /* Dock windows can be reconfigured in their height and moved to another output. */
380 if (con->parent && con->parent->type == CT_DOCKAREA) {
381 DLOG("Reconfiguring dock window (con = %p).\n", con);
382 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
383 DLOG("Dock client wants to change height to %d, we can do that.\n", event->height);
385 con->geometry.height = event->height;
389 if (event->value_mask & XCB_CONFIG_WINDOW_X || event->value_mask & XCB_CONFIG_WINDOW_Y) {
390 int16_t x = event->value_mask & XCB_CONFIG_WINDOW_X ? event->x : (int16_t)con->geometry.x;
391 int16_t y = event->value_mask & XCB_CONFIG_WINDOW_Y ? event->y : (int16_t)con->geometry.y;
393 Con *current_output = con_get_output(con);
394 Output *target = get_output_containing(x, y);
395 if (target != NULL && current_output != target->con) {
396 DLOG("Dock client is requested to be moved to output %s, moving it there.\n", target->name);
398 Con *nc = con_for_window(target->con, con->window, &match);
399 DLOG("Dock client will be moved to container %p.\n", nc);
401 con_attach(con, nc, false);
405 DLOG("Dock client will not be moved, we only support moving it to another output.\n");
410 fake_absolute_configure_notify(con);
416 * Gets triggered upon a RandR screen change event, that is when the user
417 * changes the screen configuration in any way (mode, position, …)
420 static void handle_screen_change(xcb_generic_event_t *e) {
421 DLOG("RandR screen change\n");
423 /* The geometry of the root window is used for “fullscreen global” and
424 * changes when new outputs are added. */
425 xcb_get_geometry_cookie_t cookie = xcb_get_geometry(conn, root);
426 xcb_get_geometry_reply_t *reply = xcb_get_geometry_reply(conn, cookie, NULL);
428 ELOG("Could not get geometry of the root window, exiting\n");
431 DLOG("root geometry reply: (%d, %d) %d x %d\n", reply->x, reply->y, reply->width, reply->height);
433 croot->rect.width = reply->width;
434 croot->rect.height = reply->height;
436 randr_query_outputs();
438 scratchpad_fix_resolution();
440 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
446 * Our window decorations were unmapped. That means, the window will be killed
447 * now, so we better clean up before.
450 static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
451 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
452 xcb_get_input_focus_cookie_t cookie;
453 Con *con = con_by_window_id(event->window);
455 /* This could also be an UnmapNotify for the frame. We need to
456 * decrement the ignore_unmap counter. */
457 con = con_by_frame_id(event->window);
459 LOG("Not a managed window, ignoring UnmapNotify event\n");
463 if (con->ignore_unmap > 0)
465 /* See the end of this function. */
466 cookie = xcb_get_input_focus(conn);
467 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
471 /* See the end of this function. */
472 cookie = xcb_get_input_focus(conn);
474 if (con->ignore_unmap > 0) {
475 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
480 /* Since we close the container, we need to unset _NET_WM_DESKTOP and
481 * _NET_WM_STATE according to the spec. */
482 xcb_delete_property(conn, event->window, A__NET_WM_DESKTOP);
483 xcb_delete_property(conn, event->window, A__NET_WM_STATE);
485 tree_close_internal(con, DONT_KILL_WINDOW, false, false);
489 /* If the client (as opposed to i3) destroyed or unmapped a window, an
490 * EnterNotify event will follow (indistinguishable from an EnterNotify
491 * event caused by moving your mouse), causing i3 to set focus to whichever
492 * window is now visible.
494 * In a complex stacked or tabbed layout (take two v-split containers in a
495 * tabbed container), when the bottom window in tab2 is closed, the bottom
496 * window of tab1 is visible instead. X11 will thus send an EnterNotify
497 * event for the bottom window of tab1, while the focus should be set to
498 * the remaining window of tab2.
500 * Therefore, we ignore all EnterNotify events which have the same sequence
501 * as an UnmapNotify event. */
502 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
504 /* Since we just ignored the sequence of this UnmapNotify, we want to make
505 * sure that following events use a different sequence. When putting xterm
506 * into fullscreen and moving the pointer to a different window, without
507 * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
508 * with the same sequence and thus were ignored (see ticket #609). */
509 free(xcb_get_input_focus_reply(conn, cookie, NULL));
513 * A destroy notify event is sent when the window is not unmapped, but
514 * immediately destroyed (for example when starting a window and immediately
515 * killing the program which started it).
517 * We just pass on the event to the unmap notify handler (by copying the
518 * important fields in the event data structure).
521 static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
522 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
524 xcb_unmap_notify_event_t unmap;
525 unmap.sequence = event->sequence;
526 unmap.event = event->event;
527 unmap.window = event->window;
529 handle_unmap_notify_event(&unmap);
532 static bool window_name_changed(i3Window *window, char *old_name) {
533 if ((old_name == NULL) && (window->name == NULL))
536 /* Either the old or the new one is NULL, but not both. */
537 if ((old_name == NULL) ^ (window->name == NULL))
540 return (strcmp(old_name, i3string_as_utf8(window->name)) != 0);
544 * Called when a window changes its title
547 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
548 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
550 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
553 char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
555 window_update_name(con->window, prop, false);
557 x_push_changes(croot);
559 if (window_name_changed(con->window, old_name))
560 ipc_send_window_event("title", con);
568 * Handles legacy window name updates (WM_NAME), see also src/window.c,
569 * window_update_name_legacy().
572 static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
573 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
575 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
578 char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
580 window_update_name_legacy(con->window, prop, false);
582 x_push_changes(croot);
584 if (window_name_changed(con->window, old_name))
585 ipc_send_window_event("title", con);
593 * Called when a window changes its WM_WINDOW_ROLE.
596 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
597 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
599 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
602 window_update_role(con->window, prop, false);
608 * Expose event means we should redraw our windows (= title bar)
611 static void handle_expose_event(xcb_expose_event_t *event) {
614 DLOG("window = %08x\n", event->window);
616 if ((parent = con_by_frame_id(event->window)) == NULL) {
617 LOG("expose event for unknown window, ignoring\n");
621 /* Since we render to our surface on every change anyways, expose events
622 * only tell us that the X server lost (parts of) the window contents. We
623 * can handle that by copying the appropriate part from our surface to the
625 draw_util_copy_surface(conn, &(parent->frame_buffer), &(parent->frame),
626 event->x, event->y, event->x, event->y,
627 event->width, event->height);
632 #define _NET_WM_MOVERESIZE_SIZE_TOPLEFT 0
633 #define _NET_WM_MOVERESIZE_SIZE_TOP 1
634 #define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT 2
635 #define _NET_WM_MOVERESIZE_SIZE_RIGHT 3
636 #define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT 4
637 #define _NET_WM_MOVERESIZE_SIZE_BOTTOM 5
638 #define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT 6
639 #define _NET_WM_MOVERESIZE_SIZE_LEFT 7
640 #define _NET_WM_MOVERESIZE_MOVE 8 /* movement only */
641 #define _NET_WM_MOVERESIZE_SIZE_KEYBOARD 9 /* size via keyboard */
642 #define _NET_WM_MOVERESIZE_MOVE_KEYBOARD 10 /* move via keyboard */
643 #define _NET_WM_MOVERESIZE_CANCEL 11 /* cancel operation */
646 * Handle client messages (EWMH)
649 static void handle_client_message(xcb_client_message_event_t *event) {
650 /* If this is a startup notification ClientMessage, the library will handle
651 * it and call our monitor_event() callback. */
652 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t *)event))
655 LOG("ClientMessage for window 0x%08x\n", event->window);
656 if (event->type == A__NET_WM_STATE) {
657 if (event->format != 32 ||
658 (event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN &&
659 event->data.data32[1] != A__NET_WM_STATE_DEMANDS_ATTENTION &&
660 event->data.data32[1] != A__NET_WM_STATE_STICKY)) {
661 DLOG("Unknown atom in clientmessage of type %d\n", event->data.data32[1]);
665 Con *con = con_by_window_id(event->window);
667 DLOG("Could not get window for client message\n");
671 if (event->data.data32[1] == A__NET_WM_STATE_FULLSCREEN) {
672 /* Check if the fullscreen state should be toggled */
673 if ((con->fullscreen_mode != CF_NONE &&
674 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
675 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
676 (con->fullscreen_mode == CF_NONE &&
677 (event->data.data32[0] == _NET_WM_STATE_ADD ||
678 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
679 DLOG("toggling fullscreen\n");
680 con_toggle_fullscreen(con, CF_OUTPUT);
682 } else if (event->data.data32[1] == A__NET_WM_STATE_DEMANDS_ATTENTION) {
683 /* Check if the urgent flag must be set or not */
684 if (event->data.data32[0] == _NET_WM_STATE_ADD)
685 con_set_urgency(con, true);
686 else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
687 con_set_urgency(con, false);
688 else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
689 con_set_urgency(con, !con->urgent);
690 } else if (event->data.data32[1] == A__NET_WM_STATE_STICKY) {
691 DLOG("Received a client message to modify _NET_WM_STATE_STICKY.\n");
692 if (event->data.data32[0] == _NET_WM_STATE_ADD)
694 else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
696 else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
697 con->sticky = !con->sticky;
699 DLOG("New sticky status for con = %p is %i.\n", con, con->sticky);
700 ewmh_update_sticky(con->window->id, con->sticky);
701 output_push_sticky_windows(focused);
702 ewmh_update_wm_desktop();
706 } else if (event->type == A__NET_ACTIVE_WINDOW) {
707 if (event->format != 32)
710 DLOG("_NET_ACTIVE_WINDOW: Window 0x%08x should be activated\n", event->window);
712 Con *con = con_by_window_id(event->window);
714 DLOG("Could not get window for client message\n");
718 Con *ws = con_get_workspace(con);
721 DLOG("Window is not being managed, ignoring _NET_ACTIVE_WINDOW\n");
725 if (con_is_internal(ws)) {
726 DLOG("Workspace is internal, ignoring _NET_ACTIVE_WINDOW\n");
730 /* data32[0] indicates the source of the request (application or pager) */
731 if (event->data.data32[0] == 2) {
732 /* Always focus the con if it is from a pager, because this is most
733 * likely from some user action */
734 DLOG("This request came from a pager. Focusing con = %p\n", con);
738 /* Request is from an application. */
740 if (config.focus_on_window_activation == FOWA_FOCUS || (config.focus_on_window_activation == FOWA_SMART && workspace_is_visible(ws))) {
741 DLOG("Focusing con = %p\n", con);
744 } else if (config.focus_on_window_activation == FOWA_URGENT || (config.focus_on_window_activation == FOWA_SMART && !workspace_is_visible(ws))) {
745 DLOG("Marking con = %p urgent\n", con);
746 con_set_urgency(con, true);
748 DLOG("Ignoring request for con = %p.\n", con);
752 } else if (event->type == A_I3_SYNC) {
753 xcb_window_t window = event->data.data32[0];
754 uint32_t rnd = event->data.data32[1];
755 DLOG("[i3 sync protocol] Sending random value %d back to X11 window 0x%08x\n", rnd, window);
757 void *reply = scalloc(32, 1);
758 xcb_client_message_event_t *ev = reply;
760 ev->response_type = XCB_CLIENT_MESSAGE;
762 ev->type = A_I3_SYNC;
764 ev->data.data32[0] = window;
765 ev->data.data32[1] = rnd;
767 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char *)ev);
770 } else if (event->type == A__NET_REQUEST_FRAME_EXTENTS) {
772 * A client can request an estimate for the frame size which the window
773 * manager will put around it before actually mapping its window. Java
774 * does this (as of openjdk-7).
776 * Note that the calculation below is not entirely accurate — once you
777 * set a different border type, it’s off. We _could_ request all the
778 * window properties (which have to be set up at this point according
779 * to EWMH), but that seems rather elaborate. The standard explicitly
780 * says the application must cope with an estimate that is not entirely
783 DLOG("_NET_REQUEST_FRAME_EXTENTS for window 0x%08x\n", event->window);
785 /* The reply data: approximate frame size */
787 config.default_border_width, /* left */
788 config.default_border_width, /* right */
789 config.font.height + 5, /* top */
790 config.default_border_width /* bottom */
794 XCB_PROP_MODE_REPLACE,
796 A__NET_FRAME_EXTENTS,
797 XCB_ATOM_CARDINAL, 32, 4,
800 } else if (event->type == A__NET_CURRENT_DESKTOP) {
801 /* This request is used by pagers and bars to change the current
802 * desktop likely as a result of some user action. We interpret this as
803 * a request to focus the given workspace. See
804 * http://standards.freedesktop.org/wm-spec/latest/ar01s03.html#idm140251368135008
806 DLOG("Request to change current desktop to index %d\n", event->data.data32[0]);
807 Con *ws = ewmh_get_workspace_by_index(event->data.data32[0]);
809 ELOG("Could not determine workspace for this index, ignoring request.\n");
813 DLOG("Handling request to focus workspace %s\n", ws->name);
816 } else if (event->type == A__NET_WM_DESKTOP) {
817 uint32_t index = event->data.data32[0];
818 DLOG("Request to move window %d to EWMH desktop index %d\n", event->window, index);
820 Con *con = con_by_window_id(event->window);
822 DLOG("Couldn't find con for window %d, ignoring the request.\n", event->window);
826 if (index == NET_WM_DESKTOP_ALL) {
827 /* The window is requesting to be visible on all workspaces, so
828 * let's float it and make it sticky. */
829 DLOG("The window was requested to be visible on all workspaces, making it sticky and floating.\n");
831 floating_enable(con, false);
834 ewmh_update_sticky(con->window->id, true);
835 output_push_sticky_windows(focused);
837 Con *ws = ewmh_get_workspace_by_index(index);
839 ELOG("Could not determine workspace for this index, ignoring request.\n");
843 con_move_to_workspace(con, ws, true, false, false);
847 ewmh_update_wm_desktop();
848 } else if (event->type == A__NET_CLOSE_WINDOW) {
850 * Pagers wanting to close a window MUST send a _NET_CLOSE_WINDOW
851 * client message request to the root window.
852 * http://standards.freedesktop.org/wm-spec/wm-spec-latest.html#idm140200472668896
854 Con *con = con_by_window_id(event->window);
856 DLOG("Handling _NET_CLOSE_WINDOW request (con = %p)\n", con);
858 if (event->data.data32[0])
859 last_timestamp = event->data.data32[0];
861 tree_close_internal(con, KILL_WINDOW, false, false);
864 DLOG("Couldn't find con for _NET_CLOSE_WINDOW request. (window = %d)\n", event->window);
866 } else if (event->type == A__NET_WM_MOVERESIZE) {
868 * Client-side decorated Gtk3 windows emit this signal when being
869 * dragged by their GtkHeaderBar
871 Con *con = con_by_window_id(event->window);
872 if (!con || !con_is_floating(con)) {
873 DLOG("Couldn't find con for _NET_WM_MOVERESIZE request, or con not floating (window = %d)\n", event->window);
876 DLOG("Handling _NET_WM_MOVERESIZE request (con = %p)\n", con);
877 uint32_t direction = event->data.data32[2];
878 uint32_t x_root = event->data.data32[0];
879 uint32_t y_root = event->data.data32[1];
880 /* construct fake xcb_button_press_event_t */
881 xcb_button_press_event_t fake = {
884 .event_x = x_root - (con->rect.x),
885 .event_y = y_root - (con->rect.y)};
887 case _NET_WM_MOVERESIZE_MOVE:
888 floating_drag_window(con->parent, &fake);
890 case _NET_WM_MOVERESIZE_SIZE_TOPLEFT... _NET_WM_MOVERESIZE_SIZE_LEFT:
891 floating_resize_window(con->parent, false, &fake);
894 DLOG("_NET_WM_MOVERESIZE direction %d not implemented\n", direction);
898 DLOG("Skipping client message for unhandled type %d\n", event->type);
902 bool handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
903 xcb_atom_t atom, xcb_get_property_reply_t *reply) {
905 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
908 window_update_type(con->window, reply);
913 * Handles the size hints set by a window, but currently only the part necessary for displaying
914 * clients proportionally inside their frames (mplayer for example)
916 * See ICCCM 4.1.2.3 for more details
919 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
920 xcb_atom_t name, xcb_get_property_reply_t *reply) {
921 Con *con = con_by_window_id(window);
923 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
927 xcb_size_hints_t size_hints;
929 //CLIENT_LOG(client);
931 /* If the hints were already in this event, use them, if not, request them */
933 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
935 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
937 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
938 // TODO: Minimum size is not yet implemented
939 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
942 bool changed = false;
943 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
944 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
945 if (con->window->width_increment != size_hints.width_inc) {
946 con->window->width_increment = size_hints.width_inc;
949 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
950 if (con->window->height_increment != size_hints.height_inc) {
951 con->window->height_increment = size_hints.height_inc;
956 DLOG("resize increments changed\n");
959 int base_width = 0, base_height = 0;
961 /* base_width/height are the desired size of the window.
962 We check if either the program-specified size or the program-specified
963 min-size is available */
964 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
965 base_width = size_hints.base_width;
966 base_height = size_hints.base_height;
967 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
968 /* TODO: is this right? icccm says not */
969 base_width = size_hints.min_width;
970 base_height = size_hints.min_height;
973 if (base_width != con->window->base_width ||
974 base_height != con->window->base_height) {
975 con->window->base_width = base_width;
976 con->window->base_height = base_height;
977 DLOG("client's base_height changed to %d\n", base_height);
978 DLOG("client's base_width changed to %d\n", base_width);
982 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
983 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
984 (size_hints.min_aspect_num <= 0) ||
985 (size_hints.min_aspect_den <= 0)) {
986 goto render_and_return;
989 /* XXX: do we really use rect here, not window_rect? */
990 double width = con->rect.width - base_width;
991 double height = con->rect.height - base_height;
992 /* Convert numerator/denominator to a double */
993 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
994 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
996 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
997 DLOG("width = %f, height = %f\n", width, height);
999 /* Sanity checks, this is user-input, in a way */
1000 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
1001 goto render_and_return;
1003 /* Check if we need to set proportional_* variables using the correct ratio */
1004 double aspect_ratio = 0.0;
1005 if ((width / height) < min_aspect) {
1006 aspect_ratio = min_aspect;
1007 } else if ((width / height) > max_aspect) {
1008 aspect_ratio = max_aspect;
1010 goto render_and_return;
1012 if (fabs(con->window->aspect_ratio - aspect_ratio) > DBL_EPSILON) {
1013 con->window->aspect_ratio = aspect_ratio;
1025 * Handles the WM_HINTS property for extracting the urgency state of the window.
1028 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
1029 xcb_atom_t name, xcb_get_property_reply_t *reply) {
1030 Con *con = con_by_window_id(window);
1032 DLOG("Received WM_HINTS for unknown client\n");
1038 reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL);
1039 window_update_hints(con->window, reply, &urgency_hint);
1040 con_set_urgency(con, urgency_hint);
1047 * Handles the transient for hints set by a window, signalizing that this window is a popup window
1048 * for some other window.
1050 * See ICCCM 4.1.2.6 for more details
1053 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
1054 xcb_atom_t name, xcb_get_property_reply_t *prop) {
1057 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
1058 DLOG("No such window\n");
1063 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
1064 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32),
1070 window_update_transient_for(con->window, prop);
1076 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
1077 * toolwindow (or similar) and to which window it belongs (logical parent).
1080 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
1081 xcb_atom_t name, xcb_get_property_reply_t *prop) {
1083 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
1087 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
1088 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32),
1094 window_update_leader(con->window, prop);
1100 * Handles FocusIn events which are generated by clients (i3’s focus changes
1101 * don’t generate FocusIn events due to a different EventMask) and updates the
1102 * decorations accordingly.
1105 static void handle_focus_in(xcb_focus_in_event_t *event) {
1106 DLOG("focus change in, for window 0x%08x\n", event->event);
1108 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
1110 DLOG("That is con %p / %s\n", con, con->name);
1112 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
1113 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
1114 DLOG("FocusIn event for grab/ungrab, ignoring\n");
1118 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
1119 DLOG("notify detail is pointer, ignoring this event\n");
1123 if (focused_id == event->event) {
1124 DLOG("focus matches the currently focused window, not doing anything\n");
1128 /* Skip dock clients, they cannot get the i3 focus. */
1129 if (con->parent->type == CT_DOCKAREA) {
1130 DLOG("This is a dock client, not focusing.\n");
1134 DLOG("focus is different, updating decorations\n");
1136 /* Get the currently focused workspace to check if the focus change also
1137 * involves changing workspaces. If so, we need to call workspace_show() to
1138 * correctly update state and send the IPC event. */
1139 Con *ws = con_get_workspace(con);
1140 if (ws != con_get_workspace(focused))
1144 /* We update focused_id because we don’t need to set focus again */
1145 focused_id = event->event;
1146 x_push_changes(croot);
1151 * Handles the WM_CLASS property for assignments and criteria selection.
1154 static bool handle_class_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
1155 xcb_atom_t name, xcb_get_property_reply_t *prop) {
1157 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
1161 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
1162 false, window, XCB_ATOM_WM_CLASS, XCB_ATOM_STRING, 0, 32),
1169 window_update_class(con->window, prop, false);
1175 * Handles the _NET_WM_STRUT_PARTIAL property for allocating space for dock clients.
1178 static bool handle_strut_partial_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
1179 xcb_atom_t name, xcb_get_property_reply_t *prop) {
1180 DLOG("strut partial change for window 0x%08x\n", window);
1183 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
1188 xcb_generic_error_t *err = NULL;
1189 xcb_get_property_cookie_t strut_cookie = xcb_get_property(conn, false, window, A__NET_WM_STRUT_PARTIAL,
1190 XCB_GET_PROPERTY_TYPE_ANY, 0, UINT32_MAX);
1191 prop = xcb_get_property_reply(conn, strut_cookie, &err);
1194 DLOG("got error when getting strut partial property: %d\n", err->error_code);
1204 DLOG("That is con %p / %s\n", con, con->name);
1206 window_update_strut_partial(con->window, prop);
1208 /* we only handle this change for dock clients */
1209 if (con->parent == NULL || con->parent->type != CT_DOCKAREA) {
1213 Con *search_at = croot;
1214 Con *output = con_get_output(con);
1215 if (output != NULL) {
1216 DLOG("Starting search at output %s\n", output->name);
1220 /* find out the desired position of this dock window */
1221 if (con->window->reserved.top > 0 && con->window->reserved.bottom == 0) {
1222 DLOG("Top dock client\n");
1223 con->window->dock = W_DOCK_TOP;
1224 } else if (con->window->reserved.top == 0 && con->window->reserved.bottom > 0) {
1225 DLOG("Bottom dock client\n");
1226 con->window->dock = W_DOCK_BOTTOM;
1228 DLOG("Ignoring invalid reserved edges (_NET_WM_STRUT_PARTIAL), using position as fallback:\n");
1229 if (con->geometry.y < (search_at->rect.height / 2)) {
1230 DLOG("geom->y = %d < rect.height / 2 = %d, it is a top dock client\n",
1231 con->geometry.y, (search_at->rect.height / 2));
1232 con->window->dock = W_DOCK_TOP;
1234 DLOG("geom->y = %d >= rect.height / 2 = %d, it is a bottom dock client\n",
1235 con->geometry.y, (search_at->rect.height / 2));
1236 con->window->dock = W_DOCK_BOTTOM;
1240 /* find the dockarea */
1241 Con *dockarea = con_for_window(search_at, con->window, NULL);
1242 assert(dockarea != NULL);
1244 /* attach the dock to the dock area */
1246 con->parent = dockarea;
1247 TAILQ_INSERT_HEAD(&(dockarea->focus_head), con, focused);
1248 TAILQ_INSERT_HEAD(&(dockarea->nodes_head), con, nodes);
1255 /* Returns false if the event could not be processed (e.g. the window could not
1256 * be found), true otherwise */
1257 typedef bool (*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);
1259 struct property_handler_t {
1262 cb_property_handler_t cb;
1265 static struct property_handler_t property_handlers[] = {
1266 {0, 128, handle_windowname_change},
1267 {0, UINT_MAX, handle_hints},
1268 {0, 128, handle_windowname_change_legacy},
1269 {0, UINT_MAX, handle_normal_hints},
1270 {0, UINT_MAX, handle_clientleader_change},
1271 {0, UINT_MAX, handle_transient_for},
1272 {0, 128, handle_windowrole_change},
1273 {0, 128, handle_class_change},
1274 {0, UINT_MAX, handle_strut_partial_change},
1275 {0, UINT_MAX, handle_window_type}};
1276 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
1279 * Sets the appropriate atoms for the property handlers after the atoms were
1283 void property_handlers_init(void) {
1284 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
1286 property_handlers[0].atom = A__NET_WM_NAME;
1287 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1288 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1289 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1290 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1291 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1292 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1293 property_handlers[7].atom = XCB_ATOM_WM_CLASS;
1294 property_handlers[8].atom = A__NET_WM_STRUT_PARTIAL;
1295 property_handlers[9].atom = A__NET_WM_WINDOW_TYPE;
1298 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1299 struct property_handler_t *handler = NULL;
1300 xcb_get_property_reply_t *propr = NULL;
1302 for (size_t c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1303 if (property_handlers[c].atom != atom)
1306 handler = &property_handlers[c];
1310 if (handler == NULL) {
1311 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1315 if (state != XCB_PROPERTY_DELETE) {
1316 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1317 propr = xcb_get_property_reply(conn, cookie, 0);
1320 /* the handler will free() the reply unless it returns false */
1321 if (!handler->cb(NULL, conn, state, window, atom, propr))
1326 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1330 void handle_event(int type, xcb_generic_event_t *event) {
1331 if (type != XCB_MOTION_NOTIFY)
1332 DLOG("event type %d, xkb_base %d\n", type, xkb_base);
1334 if (randr_base > -1 &&
1335 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1336 handle_screen_change(event);
1340 if (xkb_base > -1 && type == xkb_base) {
1341 DLOG("xkb event, need to handle it.\n");
1343 xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1344 if (state->xkbType == XCB_XKB_NEW_KEYBOARD_NOTIFY) {
1345 DLOG("xkb new keyboard notify, sequence %d, time %d\n", state->sequence, state->time);
1346 xcb_key_symbols_free(keysyms);
1347 keysyms = xcb_key_symbols_alloc(conn);
1348 if (((xcb_xkb_new_keyboard_notify_event_t *)event)->changed & XCB_XKB_NKN_DETAIL_KEYCODES)
1349 (void)load_keymap();
1350 ungrab_all_keys(conn);
1351 translate_keysyms();
1352 grab_all_keys(conn);
1353 } else if (state->xkbType == XCB_XKB_MAP_NOTIFY) {
1354 if (event_is_ignored(event->sequence, type)) {
1355 DLOG("Ignoring map notify event for sequence %d.\n", state->sequence);
1357 DLOG("xkb map notify, sequence %d, time %d\n", state->sequence, state->time);
1358 add_ignore_event(event->sequence, type);
1359 xcb_key_symbols_free(keysyms);
1360 keysyms = xcb_key_symbols_alloc(conn);
1361 ungrab_all_keys(conn);
1362 translate_keysyms();
1363 grab_all_keys(conn);
1364 (void)load_keymap();
1366 } else if (state->xkbType == XCB_XKB_STATE_NOTIFY) {
1367 DLOG("xkb state group = %d\n", state->group);
1368 if (xkb_current_group == state->group)
1370 xkb_current_group = state->group;
1371 ungrab_all_keys(conn);
1372 grab_all_keys(conn);
1380 case XCB_KEY_RELEASE:
1381 handle_key_press((xcb_key_press_event_t *)event);
1384 case XCB_BUTTON_PRESS:
1385 case XCB_BUTTON_RELEASE:
1386 handle_button_press((xcb_button_press_event_t *)event);
1389 case XCB_MAP_REQUEST:
1390 handle_map_request((xcb_map_request_event_t *)event);
1393 case XCB_UNMAP_NOTIFY:
1394 handle_unmap_notify_event((xcb_unmap_notify_event_t *)event);
1397 case XCB_DESTROY_NOTIFY:
1398 handle_destroy_notify_event((xcb_destroy_notify_event_t *)event);
1402 handle_expose_event((xcb_expose_event_t *)event);
1405 case XCB_MOTION_NOTIFY:
1406 handle_motion_notify((xcb_motion_notify_event_t *)event);
1409 /* Enter window = user moved their mouse over the window */
1410 case XCB_ENTER_NOTIFY:
1411 handle_enter_notify((xcb_enter_notify_event_t *)event);
1414 /* Client message are sent to the root window. The only interesting
1415 * client message for us is _NET_WM_STATE, we honour
1416 * _NET_WM_STATE_FULLSCREEN and _NET_WM_STATE_DEMANDS_ATTENTION */
1417 case XCB_CLIENT_MESSAGE:
1418 handle_client_message((xcb_client_message_event_t *)event);
1421 /* Configure request = window tried to change size on its own */
1422 case XCB_CONFIGURE_REQUEST:
1423 handle_configure_request((xcb_configure_request_event_t *)event);
1426 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1427 case XCB_MAPPING_NOTIFY:
1428 handle_mapping_notify((xcb_mapping_notify_event_t *)event);
1432 handle_focus_in((xcb_focus_in_event_t *)event);
1435 case XCB_PROPERTY_NOTIFY: {
1436 xcb_property_notify_event_t *e = (xcb_property_notify_event_t *)event;
1437 last_timestamp = e->time;
1438 property_notify(e->state, e->window, e->atom);
1443 //DLOG("Unhandled event of type %d\n", type);