2 #define I3__FILE__ "handlers.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
9 * handlers.c: Small handlers for various events (keypresses, focus changes,
18 #include <xcb/randr.h>
19 #include <X11/XKBlib.h>
20 #define SN_API_NOT_YET_FROZEN 1
21 #include <libsn/sn-monitor.h>
25 int xkb_current_group;
27 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
28 since it’d trigger an infinite loop of switching between the different windows when
29 changing workspaces */
30 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
33 * Adds the given sequence to the list of events which are ignored.
34 * If this ignore should only affect a specific response_type, pass
35 * response_type, otherwise, pass -1.
37 * Every ignored sequence number gets garbage collected after 5 seconds.
40 void add_ignore_event(const int sequence, const int response_type) {
41 struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
43 event->sequence = sequence;
44 event->response_type = response_type;
45 event->added = time(NULL);
47 SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
51 * Checks if the given sequence is ignored and returns true if so.
54 bool event_is_ignored(const int sequence, const int response_type) {
55 struct Ignore_Event *event;
56 time_t now = time(NULL);
57 for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
58 if ((now - event->added) > 5) {
59 struct Ignore_Event *save = event;
60 event = SLIST_NEXT(event, ignore_events);
61 SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
64 event = SLIST_NEXT(event, ignore_events);
67 SLIST_FOREACH(event, &ignore_events, ignore_events) {
68 if (event->sequence != sequence)
71 if (event->response_type != -1 &&
72 event->response_type != response_type)
75 /* instead of removing a sequence number we better wait until it gets
76 * garbage collected. it may generate multiple events (there are multiple
77 * enter_notifies for one configure_request, for example). */
78 //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
87 * Called with coordinates of an enter_notify event or motion_notify event
88 * to check if the user crossed virtual screen boundaries and adjust the
89 * current workspace, if so.
92 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
95 /* If the user disable focus follows mouse, we have nothing to do here */
96 if (config.disable_focus_follows_mouse)
99 if ((output = get_output_containing(x, y)) == NULL) {
100 ELOG("ERROR: No such screen\n");
104 if (output->con == NULL) {
105 ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
109 /* Focus the output on which the user moved his cursor */
110 Con *old_focused = focused;
111 Con *next = con_descend_focused(output_get_content(output->con));
112 /* Since we are switching outputs, this *must* be a different workspace, so
113 * call workspace_show() */
114 workspace_show(con_get_workspace(next));
117 /* If the focus changed, we re-render to get updated decorations */
118 if (old_focused != focused)
123 * When the user moves the mouse pointer onto a window, this callback gets called.
126 static void handle_enter_notify(xcb_enter_notify_event_t *event) {
129 last_timestamp = event->time;
131 DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
132 event->event, event->mode, event->detail, event->sequence);
133 DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
134 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
135 DLOG("This was not a normal notify, ignoring\n");
138 /* Some events are not interesting, because they were not generated
139 * actively by the user, but by reconfiguration of windows */
140 if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
141 DLOG("Event ignored\n");
145 bool enter_child = false;
146 /* Get container by frame or by child window */
147 if ((con = con_by_frame_id(event->event)) == NULL) {
148 con = con_by_window_id(event->event);
152 /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
154 DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
155 check_crossing_screen_boundary(event->root_x, event->root_y);
159 if (con->parent->type == CT_DOCKAREA) {
160 DLOG("Ignoring, this is a dock client\n");
164 /* see if the user entered the window on a certain window decoration */
165 layout_t layout = (enter_child ? con->parent->layout : con->layout);
166 if (layout == L_DEFAULT) {
168 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
169 if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
170 LOG("using child %p / %s instead!\n", child, child->name);
177 if (client->workspace != c_ws && client->workspace->output == c_ws->output) {
178 /* This can happen when a client gets assigned to a different workspace than
179 * the current one (see src/mainx.c:reparent_window). Shortly after it was created,
180 * an enter_notify will follow. */
181 DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
186 if (config.disable_focus_follows_mouse)
189 /* if this container is already focused, there is nothing to do. */
193 /* Get the currently focused workspace to check if the focus change also
194 * involves changing workspaces. If so, we need to call workspace_show() to
195 * correctly update state and send the IPC event. */
196 Con *ws = con_get_workspace(con);
197 if (ws != con_get_workspace(focused))
200 focused_id = XCB_NONE;
201 con_focus(con_descend_focused(con));
208 * When the user moves the mouse but does not change the active window
209 * (e.g. when having no windows opened but moving mouse on the root screen
210 * and crossing virtual screen boundaries), this callback gets called.
213 static void handle_motion_notify(xcb_motion_notify_event_t *event) {
214 last_timestamp = event->time;
216 /* Skip events where the pointer was over a child window, we are only
217 * interested in events on the root window. */
218 if (event->child != 0)
222 if ((con = con_by_frame_id(event->event)) == NULL) {
223 DLOG("MotionNotify for an unknown container, checking if it crosses screen boundaries.\n");
224 check_crossing_screen_boundary(event->root_x, event->root_y);
228 if (config.disable_focus_follows_mouse)
231 if (con->layout != L_DEFAULT)
234 /* see over which rect the user is */
236 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
237 if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
240 /* We found the rect, let’s see if this window is focused */
241 if (TAILQ_FIRST(&(con->focus_head)) == current)
245 x_push_changes(croot);
253 * Called when the keyboard mapping changes (for example by using Xmodmap),
254 * we need to update our key bindings then (re-translate symbols).
257 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
258 if (event->request != XCB_MAPPING_KEYBOARD &&
259 event->request != XCB_MAPPING_MODIFIER)
262 DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
263 xcb_refresh_keyboard_mapping(keysyms, event);
265 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
267 ungrab_all_keys(conn);
269 grab_all_keys(conn, false);
275 * A new window appeared on the screen (=was mapped), so let’s manage it.
278 static void handle_map_request(xcb_map_request_event_t *event) {
279 xcb_get_window_attributes_cookie_t cookie;
281 cookie = xcb_get_window_attributes_unchecked(conn, event->window);
283 DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
284 add_ignore_event(event->sequence, -1);
286 manage_window(event->window, cookie, false);
287 x_push_changes(croot);
292 * Configure requests are received when the application wants to resize windows
295 * We generate a synthethic configure notify event to signalize the client its
299 static void handle_configure_request(xcb_configure_request_event_t *event) {
302 DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
303 event->window, event->x, event->y, event->width, event->height);
305 /* For unmanaged windows, we just execute the configure request. As soon as
306 * it gets mapped, we will take over anyways. */
307 if ((con = con_by_window_id(event->window)) == NULL) {
308 DLOG("Configure request for unmanaged window, can do that.\n");
313 #define COPY_MASK_MEMBER(mask_member, event_member) \
315 if (event->value_mask & mask_member) { \
316 mask |= mask_member; \
317 values[c++] = event->event_member; \
321 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
322 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
323 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
324 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
325 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
326 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
327 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
329 xcb_configure_window(conn, event->window, mask, values);
335 DLOG("Configure request!\n");
337 Con *workspace = con_get_workspace(con),
340 /* There might not be a corresponding workspace for dock cons, therefore we
341 * have to be careful here. */
343 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
345 fullscreen = con_get_fullscreen_con(workspace, CF_GLOBAL);
348 if (fullscreen != con && con_is_floating(con) && con_is_leaf(con)) {
349 /* find the height for the decorations */
350 int deco_height = con->deco_rect.height;
351 /* we actually need to apply the size/position changes to the *parent*
353 Rect bsr = con_border_style_rect(con);
354 if (con->border_style == BS_NORMAL) {
355 bsr.y += deco_height;
356 bsr.height -= deco_height;
358 Con *floatingcon = con->parent;
360 if (strcmp(con_get_workspace(floatingcon)->name, "__i3_scratch") == 0) {
361 DLOG("This is a scratchpad container, ignoring ConfigureRequest\n");
365 Rect newrect = floatingcon->rect;
367 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
368 newrect.x = event->x + (-1) * bsr.x;
369 DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
371 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
372 newrect.y = event->y + (-1) * bsr.y;
373 DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
375 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
376 newrect.width = event->width + (-1) * bsr.width;
377 newrect.width += con->border_width * 2;
378 DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
379 event->width, newrect.width, con->border_width);
381 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
382 newrect.height = event->height + (-1) * bsr.height;
383 newrect.height += con->border_width * 2;
384 DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
385 event->height, newrect.height, con->border_width);
388 DLOG("Container is a floating leaf node, will do that.\n");
389 floating_reposition(floatingcon, newrect);
393 /* Dock windows can be reconfigured in their height */
394 if (con->parent && con->parent->type == CT_DOCKAREA) {
395 DLOG("Dock window, only height reconfiguration allowed\n");
396 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
397 DLOG("Height given, changing\n");
399 con->geometry.height = event->height;
404 fake_absolute_configure_notify(con);
411 * Configuration notifies are only handled because we need to set up ignore for
412 * the following enter notify events.
415 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
416 DLOG("configure_event, sequence %d\n", event->sequence);
417 /* We ignore this sequence twice because events for child and frame should be ignored */
418 add_ignore_event(event->sequence);
419 add_ignore_event(event->sequence);
426 * Gets triggered upon a RandR screen change event, that is when the user
427 * changes the screen configuration in any way (mode, position, …)
430 static void handle_screen_change(xcb_generic_event_t *e) {
431 DLOG("RandR screen change\n");
433 /* The geometry of the root window is used for “fullscreen global” and
434 * changes when new outputs are added. */
435 xcb_get_geometry_cookie_t cookie = xcb_get_geometry(conn, root);
436 xcb_get_geometry_reply_t *reply = xcb_get_geometry_reply(conn, cookie, NULL);
438 ELOG("Could not get geometry of the root window, exiting\n");
441 DLOG("root geometry reply: (%d, %d) %d x %d\n", reply->x, reply->y, reply->width, reply->height);
443 croot->rect.width = reply->width;
444 croot->rect.height = reply->height;
446 randr_query_outputs();
448 scratchpad_fix_resolution();
450 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
456 * Our window decorations were unmapped. That means, the window will be killed
457 * now, so we better clean up before.
460 static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
461 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
462 xcb_get_input_focus_cookie_t cookie;
463 Con *con = con_by_window_id(event->window);
465 /* This could also be an UnmapNotify for the frame. We need to
466 * decrement the ignore_unmap counter. */
467 con = con_by_frame_id(event->window);
469 LOG("Not a managed window, ignoring UnmapNotify event\n");
473 if (con->ignore_unmap > 0)
475 /* See the end of this function. */
476 cookie = xcb_get_input_focus(conn);
477 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
481 /* See the end of this function. */
482 cookie = xcb_get_input_focus(conn);
484 if (con->ignore_unmap > 0) {
485 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
490 tree_close(con, DONT_KILL_WINDOW, false, false);
494 /* If the client (as opposed to i3) destroyed or unmapped a window, an
495 * EnterNotify event will follow (indistinguishable from an EnterNotify
496 * event caused by moving your mouse), causing i3 to set focus to whichever
497 * window is now visible.
499 * In a complex stacked or tabbed layout (take two v-split containers in a
500 * tabbed container), when the bottom window in tab2 is closed, the bottom
501 * window of tab1 is visible instead. X11 will thus send an EnterNotify
502 * event for the bottom window of tab1, while the focus should be set to
503 * the remaining window of tab2.
505 * Therefore, we ignore all EnterNotify events which have the same sequence
506 * as an UnmapNotify event. */
507 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
509 /* Since we just ignored the sequence of this UnmapNotify, we want to make
510 * sure that following events use a different sequence. When putting xterm
511 * into fullscreen and moving the pointer to a different window, without
512 * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
513 * with the same sequence and thus were ignored (see ticket #609). */
514 free(xcb_get_input_focus_reply(conn, cookie, NULL));
518 * A destroy notify event is sent when the window is not unmapped, but
519 * immediately destroyed (for example when starting a window and immediately
520 * killing the program which started it).
522 * We just pass on the event to the unmap notify handler (by copying the
523 * important fields in the event data structure).
526 static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
527 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
529 xcb_unmap_notify_event_t unmap;
530 unmap.sequence = event->sequence;
531 unmap.event = event->event;
532 unmap.window = event->window;
534 handle_unmap_notify_event(&unmap);
537 static bool window_name_changed(i3Window *window, char *old_name) {
538 if ((old_name == NULL) && (window->name == NULL))
541 /* Either the old or the new one is NULL, but not both. */
542 if ((old_name == NULL) ^ (window->name == NULL))
545 return (strcmp(old_name, i3string_as_utf8(window->name)) != 0);
549 * Called when a window changes its title
552 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
553 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
555 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
558 char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
560 window_update_name(con->window, prop, false);
562 x_push_changes(croot);
564 if (window_name_changed(con->window, old_name))
565 ipc_send_window_event("title", con);
573 * Handles legacy window name updates (WM_NAME), see also src/window.c,
574 * window_update_name_legacy().
577 static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
578 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
580 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
583 char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
585 window_update_name_legacy(con->window, prop, false);
587 x_push_changes(croot);
589 if (window_name_changed(con->window, old_name))
590 ipc_send_window_event("title", con);
598 * Called when a window changes its WM_WINDOW_ROLE.
601 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
602 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
604 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
607 window_update_role(con->window, prop, false);
614 * Updates the client’s WM_CLASS property
617 static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
618 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
620 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
623 window_update_class(con->window, prop, false);
630 * Expose event means we should redraw our windows (= title bar)
633 static void handle_expose_event(xcb_expose_event_t *event) {
636 DLOG("window = %08x\n", event->window);
638 if ((parent = con_by_frame_id(event->window)) == NULL) {
639 LOG("expose event for unknown window, ignoring\n");
643 /* Since we render to our pixmap on every change anyways, expose events
644 * only tell us that the X server lost (parts of) the window contents. We
645 * can handle that by copying the appropriate part from our pixmap to the
647 xcb_copy_area(conn, parent->pixmap, parent->frame, parent->pm_gc,
648 event->x, event->y, event->x, event->y,
649 event->width, event->height);
656 * Handle client messages (EWMH)
659 static void handle_client_message(xcb_client_message_event_t *event) {
660 /* If this is a startup notification ClientMessage, the library will handle
661 * it and call our monitor_event() callback. */
662 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t *)event))
665 LOG("ClientMessage for window 0x%08x\n", event->window);
666 if (event->type == A__NET_WM_STATE) {
667 if (event->format != 32 ||
668 (event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN &&
669 event->data.data32[1] != A__NET_WM_STATE_DEMANDS_ATTENTION)) {
670 DLOG("Unknown atom in clientmessage of type %d\n", event->data.data32[1]);
674 Con *con = con_by_window_id(event->window);
676 DLOG("Could not get window for client message\n");
680 if (event->data.data32[1] == A__NET_WM_STATE_FULLSCREEN) {
681 /* Check if the fullscreen state should be toggled */
682 if ((con->fullscreen_mode != CF_NONE &&
683 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
684 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
685 (con->fullscreen_mode == CF_NONE &&
686 (event->data.data32[0] == _NET_WM_STATE_ADD ||
687 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
688 DLOG("toggling fullscreen\n");
689 con_toggle_fullscreen(con, CF_OUTPUT);
691 } else if (event->data.data32[1] == A__NET_WM_STATE_DEMANDS_ATTENTION) {
692 /* Check if the urgent flag must be set or not */
693 if (event->data.data32[0] == _NET_WM_STATE_ADD)
694 con_set_urgency(con, true);
695 else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
696 con_set_urgency(con, false);
697 else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
698 con_set_urgency(con, !con->urgent);
702 } else if (event->type == A__NET_ACTIVE_WINDOW) {
703 if (event->format != 32)
706 DLOG("_NET_ACTIVE_WINDOW: Window 0x%08x should be activated\n", event->window);
708 Con *con = con_by_window_id(event->window);
710 DLOG("Could not get window for client message\n");
714 Con *ws = con_get_workspace(con);
717 DLOG("Window is not being managed, ignoring _NET_ACTIVE_WINDOW\n");
721 if (con_is_internal(ws)) {
722 DLOG("Workspace is internal, ignoring _NET_ACTIVE_WINDOW\n");
726 /* data32[0] indicates the source of the request (application or pager) */
727 if (event->data.data32[0] == 2) {
728 /* Always focus the con if it is from a pager, because this is most
729 * likely from some user action */
730 DLOG("This request came from a pager. Focusing con = %p\n", con);
734 /* If the request is from an application, only focus if the
735 * workspace is visible. Otherwise set the urgency hint. */
736 if (workspace_is_visible(ws)) {
737 DLOG("Request to focus con on a visible workspace. Focusing con = %p\n", con);
741 DLOG("Request to focus con on a hidden workspace. Setting urgent con = %p\n", con);
742 con_set_urgency(con, true);
747 } else if (event->type == A_I3_SYNC) {
748 xcb_window_t window = event->data.data32[0];
749 uint32_t rnd = event->data.data32[1];
750 DLOG("[i3 sync protocol] Sending random value %d back to X11 window 0x%08x\n", rnd, window);
752 void *reply = scalloc(32);
753 xcb_client_message_event_t *ev = reply;
755 ev->response_type = XCB_CLIENT_MESSAGE;
757 ev->type = A_I3_SYNC;
759 ev->data.data32[0] = window;
760 ev->data.data32[1] = rnd;
762 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char *)ev);
765 } else if (event->type == A__NET_REQUEST_FRAME_EXTENTS) {
767 * A client can request an estimate for the frame size which the window
768 * manager will put around it before actually mapping its window. Java
769 * does this (as of openjdk-7).
771 * Note that the calculation below is not entirely accurate — once you
772 * set a different border type, it’s off. We _could_ request all the
773 * window properties (which have to be set up at this point according
774 * to EWMH), but that seems rather elaborate. The standard explicitly
775 * says the application must cope with an estimate that is not entirely
778 DLOG("_NET_REQUEST_FRAME_EXTENTS for window 0x%08x\n", event->window);
780 /* The reply data: approximate frame size */
782 config.default_border_width, /* left */
783 config.default_border_width, /* right */
784 config.font.height + 5, /* top */
785 config.default_border_width /* bottom */
789 XCB_PROP_MODE_REPLACE,
791 A__NET_FRAME_EXTENTS,
792 XCB_ATOM_CARDINAL, 32, 4,
796 DLOG("unhandled clientmessage\n");
802 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
803 xcb_atom_t atom, xcb_get_property_reply_t *property) {
804 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
805 before changing this property. */
806 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
812 * Handles the size hints set by a window, but currently only the part necessary for displaying
813 * clients proportionally inside their frames (mplayer for example)
815 * See ICCCM 4.1.2.3 for more details
818 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
819 xcb_atom_t name, xcb_get_property_reply_t *reply) {
820 Con *con = con_by_window_id(window);
822 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
826 xcb_size_hints_t size_hints;
828 //CLIENT_LOG(client);
830 /* If the hints were already in this event, use them, if not, request them */
832 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
834 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
836 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
837 // TODO: Minimum size is not yet implemented
838 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
841 bool changed = false;
842 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
843 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
844 if (con->width_increment != size_hints.width_inc) {
845 con->width_increment = size_hints.width_inc;
848 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
849 if (con->height_increment != size_hints.height_inc) {
850 con->height_increment = size_hints.height_inc;
855 DLOG("resize increments changed\n");
858 int base_width = 0, base_height = 0;
860 /* base_width/height are the desired size of the window.
861 We check if either the program-specified size or the program-specified
862 min-size is available */
863 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
864 base_width = size_hints.base_width;
865 base_height = size_hints.base_height;
866 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
867 /* TODO: is this right? icccm says not */
868 base_width = size_hints.min_width;
869 base_height = size_hints.min_height;
872 if (base_width != con->base_width ||
873 base_height != con->base_height) {
874 con->base_width = base_width;
875 con->base_height = base_height;
876 DLOG("client's base_height changed to %d\n", base_height);
877 DLOG("client's base_width changed to %d\n", base_width);
881 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
882 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
883 (size_hints.min_aspect_num <= 0) ||
884 (size_hints.min_aspect_den <= 0)) {
885 goto render_and_return;
888 /* XXX: do we really use rect here, not window_rect? */
889 double width = con->rect.width - base_width;
890 double height = con->rect.height - base_height;
891 /* Convert numerator/denominator to a double */
892 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
893 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
895 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
896 DLOG("width = %f, height = %f\n", width, height);
898 /* Sanity checks, this is user-input, in a way */
899 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
900 goto render_and_return;
902 /* Check if we need to set proportional_* variables using the correct ratio */
903 double aspect_ratio = 0.0;
904 if ((width / height) < min_aspect) {
905 aspect_ratio = min_aspect;
906 } else if ((width / height) > max_aspect) {
907 aspect_ratio = max_aspect;
909 goto render_and_return;
911 if (fabs(con->aspect_ratio - aspect_ratio) > DBL_EPSILON) {
912 con->aspect_ratio = aspect_ratio;
924 * Handles the WM_HINTS property for extracting the urgency state of the window.
927 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
928 xcb_atom_t name, xcb_get_property_reply_t *reply) {
929 Con *con = con_by_window_id(window);
931 DLOG("Received WM_HINTS for unknown client\n");
937 reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL);
938 window_update_hints(con->window, reply, &urgency_hint);
939 con_set_urgency(con, urgency_hint);
946 * Handles the transient for hints set by a window, signalizing that this window is a popup window
947 * for some other window.
949 * See ICCCM 4.1.2.6 for more details
952 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
953 xcb_atom_t name, xcb_get_property_reply_t *prop) {
956 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
957 DLOG("No such window\n");
962 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
963 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32),
969 window_update_transient_for(con->window, prop);
975 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
976 * toolwindow (or similar) and to which window it belongs (logical parent).
979 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
980 xcb_atom_t name, xcb_get_property_reply_t *prop) {
982 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
986 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
987 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32),
993 window_update_leader(con->window, prop);
999 * Handles FocusIn events which are generated by clients (i3’s focus changes
1000 * don’t generate FocusIn events due to a different EventMask) and updates the
1001 * decorations accordingly.
1004 static void handle_focus_in(xcb_focus_in_event_t *event) {
1005 DLOG("focus change in, for window 0x%08x\n", event->event);
1007 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
1009 DLOG("That is con %p / %s\n", con, con->name);
1011 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
1012 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
1013 DLOG("FocusIn event for grab/ungrab, ignoring\n");
1017 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
1018 DLOG("notify detail is pointer, ignoring this event\n");
1022 if (focused_id == event->event) {
1023 DLOG("focus matches the currently focused window, not doing anything\n");
1027 /* Skip dock clients, they cannot get the i3 focus. */
1028 if (con->parent->type == CT_DOCKAREA) {
1029 DLOG("This is a dock client, not focusing.\n");
1033 DLOG("focus is different, updating decorations\n");
1035 /* Get the currently focused workspace to check if the focus change also
1036 * involves changing workspaces. If so, we need to call workspace_show() to
1037 * correctly update state and send the IPC event. */
1038 Con *ws = con_get_workspace(con);
1039 if (ws != con_get_workspace(focused))
1043 /* We update focused_id because we don’t need to set focus again */
1044 focused_id = event->event;
1045 x_push_changes(croot);
1049 /* Returns false if the event could not be processed (e.g. the window could not
1050 * be found), true otherwise */
1051 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);
1053 struct property_handler_t {
1056 cb_property_handler_t cb;
1059 static struct property_handler_t property_handlers[] = {
1060 {0, 128, handle_windowname_change},
1061 {0, UINT_MAX, handle_hints},
1062 {0, 128, handle_windowname_change_legacy},
1063 {0, UINT_MAX, handle_normal_hints},
1064 {0, UINT_MAX, handle_clientleader_change},
1065 {0, UINT_MAX, handle_transient_for},
1066 {0, 128, handle_windowrole_change}};
1067 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
1070 * Sets the appropriate atoms for the property handlers after the atoms were
1074 void property_handlers_init(void) {
1075 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
1077 property_handlers[0].atom = A__NET_WM_NAME;
1078 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1079 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1080 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1081 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1082 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1083 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1086 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1087 struct property_handler_t *handler = NULL;
1088 xcb_get_property_reply_t *propr = NULL;
1090 for (size_t c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1091 if (property_handlers[c].atom != atom)
1094 handler = &property_handlers[c];
1098 if (handler == NULL) {
1099 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1103 if (state != XCB_PROPERTY_DELETE) {
1104 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1105 propr = xcb_get_property_reply(conn, cookie, 0);
1108 /* the handler will free() the reply unless it returns false */
1109 if (!handler->cb(NULL, conn, state, window, atom, propr))
1114 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1118 void handle_event(int type, xcb_generic_event_t *event) {
1119 DLOG("event type %d, xkb_base %d\n", type, xkb_base);
1120 if (randr_base > -1 &&
1121 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1122 handle_screen_change(event);
1126 if (xkb_base > -1 && type == xkb_base) {
1127 DLOG("xkb event, need to handle it.\n");
1129 xcb_xkb_state_notify_event_t *state = (xcb_xkb_state_notify_event_t *)event;
1130 if (state->xkbType == XCB_XKB_MAP_NOTIFY) {
1131 if (event_is_ignored(event->sequence, type)) {
1132 DLOG("Ignoring map notify event for sequence %d.\n", state->sequence);
1134 DLOG("xkb map notify, sequence %d, time %d\n", state->sequence, state->time);
1135 add_ignore_event(event->sequence, type);
1136 ungrab_all_keys(conn);
1137 translate_keysyms();
1138 grab_all_keys(conn, false);
1140 } else if (state->xkbType == XCB_XKB_STATE_NOTIFY) {
1141 DLOG("xkb state group = %d\n", state->group);
1143 /* See The XKB Extension: Library Specification, section 14.1 */
1144 /* We check if the current group (each group contains
1145 * two levels) has been changed. Mode_switch activates
1146 * group XkbGroup2Index */
1147 if (xkb_current_group == state->group)
1149 xkb_current_group = state->group;
1150 if (state->group == XCB_XKB_GROUP_1) {
1151 DLOG("Mode_switch disabled\n");
1152 ungrab_all_keys(conn);
1153 grab_all_keys(conn, false);
1155 DLOG("Mode_switch enabled\n");
1156 grab_all_keys(conn, false);
1165 case XCB_KEY_RELEASE:
1166 handle_key_press((xcb_key_press_event_t *)event);
1169 case XCB_BUTTON_PRESS:
1170 handle_button_press((xcb_button_press_event_t *)event);
1173 case XCB_MAP_REQUEST:
1174 handle_map_request((xcb_map_request_event_t *)event);
1177 case XCB_UNMAP_NOTIFY:
1178 handle_unmap_notify_event((xcb_unmap_notify_event_t *)event);
1181 case XCB_DESTROY_NOTIFY:
1182 handle_destroy_notify_event((xcb_destroy_notify_event_t *)event);
1186 handle_expose_event((xcb_expose_event_t *)event);
1189 case XCB_MOTION_NOTIFY:
1190 handle_motion_notify((xcb_motion_notify_event_t *)event);
1193 /* Enter window = user moved his mouse over the window */
1194 case XCB_ENTER_NOTIFY:
1195 handle_enter_notify((xcb_enter_notify_event_t *)event);
1198 /* Client message are sent to the root window. The only interesting
1199 * client message for us is _NET_WM_STATE, we honour
1200 * _NET_WM_STATE_FULLSCREEN and _NET_WM_STATE_DEMANDS_ATTENTION */
1201 case XCB_CLIENT_MESSAGE:
1202 handle_client_message((xcb_client_message_event_t *)event);
1205 /* Configure request = window tried to change size on its own */
1206 case XCB_CONFIGURE_REQUEST:
1207 handle_configure_request((xcb_configure_request_event_t *)event);
1210 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1211 case XCB_MAPPING_NOTIFY:
1212 handle_mapping_notify((xcb_mapping_notify_event_t *)event);
1216 handle_focus_in((xcb_focus_in_event_t *)event);
1219 case XCB_PROPERTY_NOTIFY: {
1220 xcb_property_notify_event_t *e = (xcb_property_notify_event_t *)event;
1221 last_timestamp = e->time;
1222 property_notify(e->state, e->window, e->atom);
1227 //DLOG("Unhandled event of type %d\n", type);