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 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
26 since it’d trigger an infinite loop of switching between the different windows when
27 changing workspaces */
28 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
31 * Adds the given sequence to the list of events which are ignored.
32 * If this ignore should only affect a specific response_type, pass
33 * response_type, otherwise, pass -1.
35 * Every ignored sequence number gets garbage collected after 5 seconds.
38 void add_ignore_event(const int sequence, const int response_type) {
39 struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
41 event->sequence = sequence;
42 event->response_type = response_type;
43 event->added = time(NULL);
45 SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
49 * Checks if the given sequence is ignored and returns true if so.
52 bool event_is_ignored(const int sequence, const int response_type) {
53 struct Ignore_Event *event;
54 time_t now = time(NULL);
55 for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
56 if ((now - event->added) > 5) {
57 struct Ignore_Event *save = event;
58 event = SLIST_NEXT(event, ignore_events);
59 SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
61 } else event = SLIST_NEXT(event, ignore_events);
64 SLIST_FOREACH(event, &ignore_events, ignore_events) {
65 if (event->sequence != sequence)
68 if (event->response_type != -1 &&
69 event->response_type != response_type)
72 /* instead of removing a sequence number we better wait until it gets
73 * garbage collected. it may generate multiple events (there are multiple
74 * enter_notifies for one configure_request, for example). */
75 //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
84 * Called with coordinates of an enter_notify event or motion_notify event
85 * to check if the user crossed virtual screen boundaries and adjust the
86 * current workspace, if so.
89 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
92 /* If the user disable focus follows mouse, we have nothing to do here */
93 if (config.disable_focus_follows_mouse)
96 if ((output = get_output_containing(x, y)) == NULL) {
97 ELOG("ERROR: No such screen\n");
101 if (output->con == NULL) {
102 ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
106 /* Focus the output on which the user moved his cursor */
107 Con *old_focused = focused;
108 Con *next = con_descend_focused(output_get_content(output->con));
109 /* Since we are switching outputs, this *must* be a different workspace, so
110 * call workspace_show() */
111 workspace_show(con_get_workspace(next));
114 /* If the focus changed, we re-render to get updated decorations */
115 if (old_focused != focused)
120 * When the user moves the mouse pointer onto a window, this callback gets called.
123 static void handle_enter_notify(xcb_enter_notify_event_t *event) {
126 last_timestamp = event->time;
128 DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
129 event->event, event->mode, event->detail, event->sequence);
130 DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
131 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
132 DLOG("This was not a normal notify, ignoring\n");
135 /* Some events are not interesting, because they were not generated
136 * actively by the user, but by reconfiguration of windows */
137 if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
138 DLOG("Event ignored\n");
142 bool enter_child = false;
143 /* Get container by frame or by child window */
144 if ((con = con_by_frame_id(event->event)) == NULL) {
145 con = con_by_window_id(event->event);
149 /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
151 DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
152 check_crossing_screen_boundary(event->root_x, event->root_y);
156 if (con->parent->type == CT_DOCKAREA) {
157 DLOG("Ignoring, this is a dock client\n");
161 /* see if the user entered the window on a certain window decoration */
162 layout_t layout = (enter_child ? con->parent->layout : con->layout);
163 if (layout == L_DEFAULT) {
165 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
166 if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
167 LOG("using child %p / %s instead!\n", child, child->name);
174 if (client->workspace != c_ws && client->workspace->output == c_ws->output) {
175 /* This can happen when a client gets assigned to a different workspace than
176 * the current one (see src/mainx.c:reparent_window). Shortly after it was created,
177 * an enter_notify will follow. */
178 DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
183 if (config.disable_focus_follows_mouse)
186 /* if this container is already focused, there is nothing to do. */
190 /* Get the currently focused workspace to check if the focus change also
191 * involves changing workspaces. If so, we need to call workspace_show() to
192 * correctly update state and send the IPC event. */
193 Con *ws = con_get_workspace(con);
194 if (ws != con_get_workspace(focused))
197 focused_id = XCB_NONE;
198 con_focus(con_descend_focused(con));
205 * When the user moves the mouse but does not change the active window
206 * (e.g. when having no windows opened but moving mouse on the root screen
207 * and crossing virtual screen boundaries), this callback gets called.
210 static void handle_motion_notify(xcb_motion_notify_event_t *event) {
212 last_timestamp = event->time;
214 /* Skip events where the pointer was over a child window, we are only
215 * interested in events on the root window. */
216 if (event->child != 0)
220 if ((con = con_by_frame_id(event->event)) == NULL) {
221 DLOG("MotionNotify for an unknown container, checking if it crosses screen boundaries.\n");
222 check_crossing_screen_boundary(event->root_x, event->root_y);
226 if (config.disable_focus_follows_mouse)
229 if (con->layout != L_DEFAULT)
232 /* see over which rect the user is */
234 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
235 if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
238 /* We found the rect, let’s see if this window is focused */
239 if (TAILQ_FIRST(&(con->focus_head)) == current)
243 x_push_changes(croot);
251 * Called when the keyboard mapping changes (for example by using Xmodmap),
252 * we need to update our key bindings then (re-translate symbols).
255 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
256 if (event->request != XCB_MAPPING_KEYBOARD &&
257 event->request != XCB_MAPPING_MODIFIER)
260 DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
261 xcb_refresh_keyboard_mapping(keysyms, event);
263 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
265 ungrab_all_keys(conn);
267 grab_all_keys(conn, false);
273 * A new window appeared on the screen (=was mapped), so let’s manage it.
276 static void handle_map_request(xcb_map_request_event_t *event) {
277 xcb_get_window_attributes_cookie_t cookie;
279 cookie = xcb_get_window_attributes_unchecked(conn, event->window);
281 DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
282 add_ignore_event(event->sequence, -1);
284 manage_window(event->window, cookie, false);
285 x_push_changes(croot);
290 * Configure requests are received when the application wants to resize windows
293 * We generate a synthethic configure notify event to signalize the client its
297 static void handle_configure_request(xcb_configure_request_event_t *event) {
300 DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
301 event->window, event->x, event->y, event->width, event->height);
303 /* For unmanaged windows, we just execute the configure request. As soon as
304 * it gets mapped, we will take over anyways. */
305 if ((con = con_by_window_id(event->window)) == NULL) {
306 DLOG("Configure request for unmanaged window, can do that.\n");
311 #define COPY_MASK_MEMBER(mask_member, event_member) do { \
312 if (event->value_mask & mask_member) { \
313 mask |= mask_member; \
314 values[c++] = event->event_member; \
318 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
319 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
320 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
321 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
322 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
323 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
324 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
326 xcb_configure_window(conn, event->window, mask, values);
332 DLOG("Configure request!\n");
334 Con *workspace = con_get_workspace(con),
337 /* There might not be a corresponding workspace for dock cons, therefore we
338 * have to be careful here. */
340 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
342 fullscreen = con_get_fullscreen_con(workspace, CF_GLOBAL);
345 if (fullscreen != con && con_is_floating(con) && con_is_leaf(con)) {
346 /* find the height for the decorations */
347 int deco_height = con->deco_rect.height;
348 /* we actually need to apply the size/position changes to the *parent*
350 Rect bsr = con_border_style_rect(con);
351 if (con->border_style == BS_NORMAL) {
352 bsr.y += deco_height;
353 bsr.height -= deco_height;
355 Con *floatingcon = con->parent;
357 if (strcmp(con_get_workspace(floatingcon)->name, "__i3_scratch") == 0) {
358 DLOG("This is a scratchpad container, ignoring ConfigureRequest\n");
362 Rect newrect = floatingcon->rect;
364 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
365 newrect.x = event->x + (-1) * bsr.x;
366 DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
368 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
369 newrect.y = event->y + (-1) * bsr.y;
370 DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
372 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
373 newrect.width = event->width + (-1) * bsr.width;
374 newrect.width += con->border_width * 2;
375 DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
376 event->width, newrect.width, con->border_width);
378 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
379 newrect.height = event->height + (-1) * bsr.height;
380 newrect.height += con->border_width * 2;
381 DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
382 event->height, newrect.height, con->border_width);
385 DLOG("Container is a floating leaf node, will do that.\n");
386 floating_reposition(floatingcon, newrect);
390 /* Dock windows can be reconfigured in their height */
391 if (con->parent && con->parent->type == CT_DOCKAREA) {
392 DLOG("Dock window, only height reconfiguration allowed\n");
393 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
394 DLOG("Height given, changing\n");
396 con->geometry.height = event->height;
401 fake_absolute_configure_notify(con);
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 void handle_screen_change(xcb_generic_event_t *e) {
428 DLOG("RandR screen change\n");
430 /* The geometry of the root window is used for “fullscreen global” and
431 * changes when new outputs are added. */
432 xcb_get_geometry_cookie_t cookie = xcb_get_geometry(conn, root);
433 xcb_get_geometry_reply_t *reply = xcb_get_geometry_reply(conn, cookie, NULL);
435 ELOG("Could not get geometry of the root window, exiting\n");
438 DLOG("root geometry reply: (%d, %d) %d x %d\n", reply->x, reply->y, reply->width, reply->height);
440 croot->rect.width = reply->width;
441 croot->rect.height = reply->height;
443 randr_query_outputs();
445 scratchpad_fix_resolution();
447 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
453 * Our window decorations were unmapped. That means, the window will be killed
454 * now, so we better clean up before.
457 static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
458 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
459 xcb_get_input_focus_cookie_t cookie;
460 Con *con = con_by_window_id(event->window);
462 /* This could also be an UnmapNotify for the frame. We need to
463 * decrement the ignore_unmap counter. */
464 con = con_by_frame_id(event->window);
466 LOG("Not a managed window, ignoring UnmapNotify event\n");
470 if (con->ignore_unmap > 0)
472 /* See the end of this function. */
473 cookie = xcb_get_input_focus(conn);
474 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
478 /* See the end of this function. */
479 cookie = xcb_get_input_focus(conn);
481 if (con->ignore_unmap > 0) {
482 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
487 tree_close(con, DONT_KILL_WINDOW, false, false);
489 x_push_changes(croot);
492 /* If the client (as opposed to i3) destroyed or unmapped a window, an
493 * EnterNotify event will follow (indistinguishable from an EnterNotify
494 * event caused by moving your mouse), causing i3 to set focus to whichever
495 * window is now visible.
497 * In a complex stacked or tabbed layout (take two v-split containers in a
498 * tabbed container), when the bottom window in tab2 is closed, the bottom
499 * window of tab1 is visible instead. X11 will thus send an EnterNotify
500 * event for the bottom window of tab1, while the focus should be set to
501 * the remaining window of tab2.
503 * Therefore, we ignore all EnterNotify events which have the same sequence
504 * as an UnmapNotify event. */
505 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
507 /* Since we just ignored the sequence of this UnmapNotify, we want to make
508 * sure that following events use a different sequence. When putting xterm
509 * into fullscreen and moving the pointer to a different window, without
510 * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
511 * with the same sequence and thus were ignored (see ticket #609). */
512 free(xcb_get_input_focus_reply(conn, cookie, NULL));
516 * A destroy notify event is sent when the window is not unmapped, but
517 * immediately destroyed (for example when starting a window and immediately
518 * killing the program which started it).
520 * We just pass on the event to the unmap notify handler (by copying the
521 * important fields in the event data structure).
524 static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
525 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
527 xcb_unmap_notify_event_t unmap;
528 unmap.sequence = event->sequence;
529 unmap.event = event->event;
530 unmap.window = event->window;
532 handle_unmap_notify_event(&unmap);
535 static bool window_name_changed(i3Window *window, char *old_name) {
536 if ((old_name == NULL) && (window->name == NULL))
539 /* Either the old or the new one is NULL, but not both. */
540 if ((old_name == NULL) ^ (window->name == NULL))
543 return (strcmp(old_name, i3string_as_utf8(window->name)) != 0);
547 * Called when a window changes its title
550 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
551 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
553 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
556 char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
558 window_update_name(con->window, prop, false);
560 x_push_changes(croot);
562 if (window_name_changed(con->window, old_name))
563 ipc_send_window_event("title", con);
571 * Handles legacy window name updates (WM_NAME), see also src/window.c,
572 * window_update_name_legacy().
575 static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
576 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
578 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
581 char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
583 window_update_name_legacy(con->window, prop, false);
585 x_push_changes(croot);
587 if (window_name_changed(con->window, old_name))
588 ipc_send_window_event("title", con);
596 * Called when a window changes its WM_WINDOW_ROLE.
599 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
600 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
602 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
605 window_update_role(con->window, prop, false);
612 * Updates the client’s WM_CLASS property
615 static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
616 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
618 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
621 window_update_class(con->window, prop, false);
628 * Expose event means we should redraw our windows (= title bar)
631 static void handle_expose_event(xcb_expose_event_t *event) {
634 DLOG("window = %08x\n", event->window);
636 if ((parent = con_by_frame_id(event->window)) == NULL) {
637 LOG("expose event for unknown window, ignoring\n");
641 /* Since we render to our pixmap on every change anyways, expose events
642 * only tell us that the X server lost (parts of) the window contents. We
643 * can handle that by copying the appropriate part from our pixmap to the
645 xcb_copy_area(conn, parent->pixmap, parent->frame, parent->pm_gc,
646 event->x, event->y, event->x, event->y,
647 event->width, event->height);
654 * Handle client messages (EWMH)
657 static void handle_client_message(xcb_client_message_event_t *event) {
658 /* If this is a startup notification ClientMessage, the library will handle
659 * it and call our monitor_event() callback. */
660 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t*)event))
663 LOG("ClientMessage for window 0x%08x\n", event->window);
664 if (event->type == A__NET_WM_STATE) {
665 if (event->format != 32 ||
666 (event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN &&
667 event->data.data32[1] != A__NET_WM_STATE_DEMANDS_ATTENTION)) {
668 DLOG("Unknown atom in clientmessage of type %d\n", event->data.data32[1]);
672 Con *con = con_by_window_id(event->window);
674 DLOG("Could not get window for client message\n");
678 if (event->data.data32[1] == A__NET_WM_STATE_FULLSCREEN) {
679 /* Check if the fullscreen state should be toggled */
680 if ((con->fullscreen_mode != CF_NONE &&
681 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
682 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
683 (con->fullscreen_mode == CF_NONE &&
684 (event->data.data32[0] == _NET_WM_STATE_ADD ||
685 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
686 DLOG("toggling fullscreen\n");
687 con_toggle_fullscreen(con, CF_OUTPUT);
689 } else if (event->data.data32[1] == A__NET_WM_STATE_DEMANDS_ATTENTION) {
690 /* Check if the urgent flag must be set or not */
691 if (event->data.data32[0] == _NET_WM_STATE_ADD)
692 con_set_urgency(con, true);
693 else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
694 con_set_urgency(con, false);
695 else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
696 con_set_urgency(con, !con->urgent);
700 } else if (event->type == A__NET_ACTIVE_WINDOW) {
701 if (event->format != 32)
704 DLOG("_NET_ACTIVE_WINDOW: Window 0x%08x should be activated\n", event->window);
706 Con *con = con_by_window_id(event->window);
708 DLOG("Could not get window for client message\n");
712 Con *ws = con_get_workspace(con);
715 DLOG("Window is not being managed, ignoring _NET_ACTIVE_WINDOW\n");
719 if (con_is_internal(ws)) {
720 DLOG("Workspace is internal, ignoring _NET_ACTIVE_WINDOW\n");
724 /* data32[0] indicates the source of the request (application or pager) */
725 if (event->data.data32[0] == 2) {
726 /* Always focus the con if it is from a pager, because this is most
727 * likely from some user action */
728 DLOG("This request came from a pager. Focusing con = %p\n", con);
732 /* If the request is from an application, only focus if the
733 * workspace is visible. Otherwise set the urgency hint. */
734 if (workspace_is_visible(ws)) {
735 DLOG("Request to focus con on a visible workspace. Focusing con = %p\n", con);
739 DLOG("Request to focus con on a hidden workspace. Setting urgent con = %p\n", con);
740 con_set_urgency(con, true);
745 } else if (event->type == A_I3_SYNC) {
746 xcb_window_t window = event->data.data32[0];
747 uint32_t rnd = event->data.data32[1];
748 DLOG("[i3 sync protocol] Sending random value %d back to X11 window 0x%08x\n", rnd, window);
750 void *reply = scalloc(32);
751 xcb_client_message_event_t *ev = reply;
753 ev->response_type = XCB_CLIENT_MESSAGE;
755 ev->type = A_I3_SYNC;
757 ev->data.data32[0] = window;
758 ev->data.data32[1] = rnd;
760 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
763 } else if (event->type == A__NET_REQUEST_FRAME_EXTENTS) {
765 * A client can request an estimate for the frame size which the window
766 * manager will put around it before actually mapping its window. Java
767 * does this (as of openjdk-7).
769 * Note that the calculation below is not entirely accurate — once you
770 * set a different border type, it’s off. We _could_ request all the
771 * window properties (which have to be set up at this point according
772 * to EWMH), but that seems rather elaborate. The standard explicitly
773 * says the application must cope with an estimate that is not entirely
776 DLOG("_NET_REQUEST_FRAME_EXTENTS for window 0x%08x\n", event->window);
778 /* The reply data: approximate frame size */
780 config.default_border_width, /* left */
781 config.default_border_width, /* right */
782 config.font.height + 5, /* top */
783 config.default_border_width /* bottom */
787 XCB_PROP_MODE_REPLACE,
789 A__NET_FRAME_EXTENTS,
790 XCB_ATOM_CARDINAL, 32, 4,
794 DLOG("unhandled clientmessage\n");
800 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
801 xcb_atom_t atom, xcb_get_property_reply_t *property) {
802 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
803 before changing this property. */
804 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
810 * Handles the size hints set by a window, but currently only the part necessary for displaying
811 * clients proportionally inside their frames (mplayer for example)
813 * See ICCCM 4.1.2.3 for more details
816 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
817 xcb_atom_t name, xcb_get_property_reply_t *reply) {
818 Con *con = con_by_window_id(window);
820 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
824 xcb_size_hints_t size_hints;
826 //CLIENT_LOG(client);
828 /* If the hints were already in this event, use them, if not, request them */
830 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
832 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
834 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
835 // TODO: Minimum size is not yet implemented
836 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
839 bool changed = false;
840 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
841 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
842 if (con->width_increment != size_hints.width_inc) {
843 con->width_increment = size_hints.width_inc;
846 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
847 if (con->height_increment != size_hints.height_inc) {
848 con->height_increment = size_hints.height_inc;
853 DLOG("resize increments changed\n");
856 int base_width = 0, base_height = 0;
858 /* base_width/height are the desired size of the window.
859 We check if either the program-specified size or the program-specified
860 min-size is available */
861 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
862 base_width = size_hints.base_width;
863 base_height = size_hints.base_height;
864 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
865 /* TODO: is this right? icccm says not */
866 base_width = size_hints.min_width;
867 base_height = size_hints.min_height;
870 if (base_width != con->base_width ||
871 base_height != con->base_height) {
872 con->base_width = base_width;
873 con->base_height = base_height;
874 DLOG("client's base_height changed to %d\n", base_height);
875 DLOG("client's base_width changed to %d\n", base_width);
879 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
880 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
881 (size_hints.min_aspect_num <= 0) ||
882 (size_hints.min_aspect_den <= 0)) {
883 goto render_and_return;
886 /* XXX: do we really use rect here, not window_rect? */
887 double width = con->rect.width - base_width;
888 double height = con->rect.height - base_height;
889 /* Convert numerator/denominator to a double */
890 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
891 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
893 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
894 DLOG("width = %f, height = %f\n", width, height);
896 /* Sanity checks, this is user-input, in a way */
897 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
898 goto render_and_return;
900 /* Check if we need to set proportional_* variables using the correct ratio */
901 double aspect_ratio = 0.0;
902 if ((width / height) < min_aspect) {
903 aspect_ratio = min_aspect;
904 } else if ((width / height) > max_aspect) {
905 aspect_ratio = max_aspect;
906 } else goto render_and_return;
908 if (fabs(con->aspect_ratio - aspect_ratio) > DBL_EPSILON) {
909 con->aspect_ratio = aspect_ratio;
921 * Handles the WM_HINTS property for extracting the urgency state of the window.
924 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
925 xcb_atom_t name, xcb_get_property_reply_t *reply) {
926 Con *con = con_by_window_id(window);
928 DLOG("Received WM_HINTS for unknown client\n");
934 reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL);
935 window_update_hints(con->window, reply, &urgency_hint);
936 con_set_urgency(con, urgency_hint);
943 * Handles the transient for hints set by a window, signalizing that this window is a popup window
944 * for some other window.
946 * See ICCCM 4.1.2.6 for more details
949 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
950 xcb_atom_t name, xcb_get_property_reply_t *prop) {
953 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
954 DLOG("No such window\n");
959 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
960 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32), NULL);
965 window_update_transient_for(con->window, prop);
971 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
972 * toolwindow (or similar) and to which window it belongs (logical parent).
975 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
976 xcb_atom_t name, xcb_get_property_reply_t *prop) {
978 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
982 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
983 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32), NULL);
988 window_update_leader(con->window, prop);
994 * Handles FocusIn events which are generated by clients (i3’s focus changes
995 * don’t generate FocusIn events due to a different EventMask) and updates the
996 * decorations accordingly.
999 static void handle_focus_in(xcb_focus_in_event_t *event) {
1000 DLOG("focus change in, for window 0x%08x\n", event->event);
1002 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
1004 DLOG("That is con %p / %s\n", con, con->name);
1006 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
1007 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
1008 DLOG("FocusIn event for grab/ungrab, ignoring\n");
1012 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
1013 DLOG("notify detail is pointer, ignoring this event\n");
1017 if (focused_id == event->event) {
1018 DLOG("focus matches the currently focused window, not doing anything\n");
1022 /* Skip dock clients, they cannot get the i3 focus. */
1023 if (con->parent->type == CT_DOCKAREA) {
1024 DLOG("This is a dock client, not focusing.\n");
1028 DLOG("focus is different, updating decorations\n");
1030 /* Get the currently focused workspace to check if the focus change also
1031 * involves changing workspaces. If so, we need to call workspace_show() to
1032 * correctly update state and send the IPC event. */
1033 Con *ws = con_get_workspace(con);
1034 if (ws != con_get_workspace(focused))
1038 /* We update focused_id because we don’t need to set focus again */
1039 focused_id = event->event;
1040 x_push_changes(croot);
1044 /* Returns false if the event could not be processed (e.g. the window could not
1045 * be found), true otherwise */
1046 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);
1048 struct property_handler_t {
1051 cb_property_handler_t cb;
1054 static struct property_handler_t property_handlers[] = {
1055 { 0, 128, handle_windowname_change },
1056 { 0, UINT_MAX, handle_hints },
1057 { 0, 128, handle_windowname_change_legacy },
1058 { 0, UINT_MAX, handle_normal_hints },
1059 { 0, UINT_MAX, handle_clientleader_change },
1060 { 0, UINT_MAX, handle_transient_for },
1061 { 0, 128, handle_windowrole_change }
1063 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
1066 * Sets the appropriate atoms for the property handlers after the atoms were
1070 void property_handlers_init(void) {
1072 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
1074 property_handlers[0].atom = A__NET_WM_NAME;
1075 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1076 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1077 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1078 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1079 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1080 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1083 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1084 struct property_handler_t *handler = NULL;
1085 xcb_get_property_reply_t *propr = NULL;
1087 for (size_t c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1088 if (property_handlers[c].atom != atom)
1091 handler = &property_handlers[c];
1095 if (handler == NULL) {
1096 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1100 if (state != XCB_PROPERTY_DELETE) {
1101 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1102 propr = xcb_get_property_reply(conn, cookie, 0);
1105 /* the handler will free() the reply unless it returns false */
1106 if (!handler->cb(NULL, conn, state, window, atom, propr))
1111 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1115 void handle_event(int type, xcb_generic_event_t *event) {
1116 if (randr_base > -1 &&
1117 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1118 handle_screen_change(event);
1124 case XCB_KEY_RELEASE:
1125 handle_key_press((xcb_key_press_event_t*)event);
1128 case XCB_BUTTON_PRESS:
1129 handle_button_press((xcb_button_press_event_t*)event);
1132 case XCB_MAP_REQUEST:
1133 handle_map_request((xcb_map_request_event_t*)event);
1136 case XCB_UNMAP_NOTIFY:
1137 handle_unmap_notify_event((xcb_unmap_notify_event_t*)event);
1140 case XCB_DESTROY_NOTIFY:
1141 handle_destroy_notify_event((xcb_destroy_notify_event_t*)event);
1145 handle_expose_event((xcb_expose_event_t*)event);
1148 case XCB_MOTION_NOTIFY:
1149 handle_motion_notify((xcb_motion_notify_event_t*)event);
1152 /* Enter window = user moved his mouse over the window */
1153 case XCB_ENTER_NOTIFY:
1154 handle_enter_notify((xcb_enter_notify_event_t*)event);
1157 /* Client message are sent to the root window. The only interesting
1158 * client message for us is _NET_WM_STATE, we honour
1159 * _NET_WM_STATE_FULLSCREEN and _NET_WM_STATE_DEMANDS_ATTENTION */
1160 case XCB_CLIENT_MESSAGE:
1161 handle_client_message((xcb_client_message_event_t*)event);
1164 /* Configure request = window tried to change size on its own */
1165 case XCB_CONFIGURE_REQUEST:
1166 handle_configure_request((xcb_configure_request_event_t*)event);
1169 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1170 case XCB_MAPPING_NOTIFY:
1171 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
1175 handle_focus_in((xcb_focus_in_event_t*)event);
1178 case XCB_PROPERTY_NOTIFY: {
1179 xcb_property_notify_event_t *e = (xcb_property_notify_event_t*)event;
1180 last_timestamp = e->time;
1181 property_notify(e->state, e->window, e->atom);
1186 //DLOG("Unhandled event of type %d\n", type);