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);
62 event = SLIST_NEXT(event, ignore_events);
65 SLIST_FOREACH (event, &ignore_events, ignore_events) {
66 if (event->sequence != sequence)
69 if (event->response_type != -1 &&
70 event->response_type != response_type)
73 /* instead of removing a sequence number we better wait until it gets
74 * garbage collected. it may generate multiple events (there are multiple
75 * enter_notifies for one configure_request, for example). */
76 //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
85 * Called with coordinates of an enter_notify event or motion_notify event
86 * to check if the user crossed virtual screen boundaries and adjust the
87 * current workspace, if so.
90 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
93 /* If the user disable focus follows mouse, we have nothing to do here */
94 if (config.disable_focus_follows_mouse)
97 if ((output = get_output_containing(x, y)) == NULL) {
98 ELOG("ERROR: No such screen\n");
102 if (output->con == NULL) {
103 ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
107 /* Focus the output on which the user moved his cursor */
108 Con *old_focused = focused;
109 Con *next = con_descend_focused(output_get_content(output->con));
110 /* Since we are switching outputs, this *must* be a different workspace, so
111 * call workspace_show() */
112 workspace_show(con_get_workspace(next));
115 /* If the focus changed, we re-render to get updated decorations */
116 if (old_focused != focused)
121 * When the user moves the mouse pointer onto a window, this callback gets called.
124 static void handle_enter_notify(xcb_enter_notify_event_t *event) {
127 last_timestamp = event->time;
129 DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
130 event->event, event->mode, event->detail, event->sequence);
131 DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
132 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
133 DLOG("This was not a normal notify, ignoring\n");
136 /* Some events are not interesting, because they were not generated
137 * actively by the user, but by reconfiguration of windows */
138 if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
139 DLOG("Event ignored\n");
143 bool enter_child = false;
144 /* Get container by frame or by child window */
145 if ((con = con_by_frame_id(event->event)) == NULL) {
146 con = con_by_window_id(event->event);
150 /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
152 DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
153 check_crossing_screen_boundary(event->root_x, event->root_y);
157 if (con->parent->type == CT_DOCKAREA) {
158 DLOG("Ignoring, this is a dock client\n");
162 /* see if the user entered the window on a certain window decoration */
163 layout_t layout = (enter_child ? con->parent->layout : con->layout);
164 if (layout == L_DEFAULT) {
166 TAILQ_FOREACH (child, &(con->nodes_head), nodes)
167 if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
168 LOG("using child %p / %s instead!\n", child, child->name);
175 if (client->workspace != c_ws && client->workspace->output == c_ws->output) {
176 /* This can happen when a client gets assigned to a different workspace than
177 * the current one (see src/mainx.c:reparent_window). Shortly after it was created,
178 * an enter_notify will follow. */
179 DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
184 if (config.disable_focus_follows_mouse)
187 /* if this container is already focused, there is nothing to do. */
191 /* Get the currently focused workspace to check if the focus change also
192 * involves changing workspaces. If so, we need to call workspace_show() to
193 * correctly update state and send the IPC event. */
194 Con *ws = con_get_workspace(con);
195 if (ws != con_get_workspace(focused))
198 focused_id = XCB_NONE;
199 con_focus(con_descend_focused(con));
206 * When the user moves the mouse but does not change the active window
207 * (e.g. when having no windows opened but moving mouse on the root screen
208 * and crossing virtual screen boundaries), this callback gets called.
211 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) \
313 if (event->value_mask & mask_member) { \
314 mask |= mask_member; \
315 values[c++] = event->event_member; \
319 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
320 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
321 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
322 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
323 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
324 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
325 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
327 xcb_configure_window(conn, event->window, mask, values);
333 DLOG("Configure request!\n");
335 Con *workspace = con_get_workspace(con),
338 /* There might not be a corresponding workspace for dock cons, therefore we
339 * have to be careful here. */
341 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
343 fullscreen = con_get_fullscreen_con(workspace, CF_GLOBAL);
346 if (fullscreen != con && con_is_floating(con) && con_is_leaf(con)) {
347 /* find the height for the decorations */
348 int deco_height = con->deco_rect.height;
349 /* we actually need to apply the size/position changes to the *parent*
351 Rect bsr = con_border_style_rect(con);
352 if (con->border_style == BS_NORMAL) {
353 bsr.y += deco_height;
354 bsr.height -= deco_height;
356 Con *floatingcon = con->parent;
358 if (strcmp(con_get_workspace(floatingcon)->name, "__i3_scratch") == 0) {
359 DLOG("This is a scratchpad container, ignoring ConfigureRequest\n");
363 Rect newrect = floatingcon->rect;
365 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
366 newrect.x = event->x + (-1) * bsr.x;
367 DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
369 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
370 newrect.y = event->y + (-1) * bsr.y;
371 DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
373 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
374 newrect.width = event->width + (-1) * bsr.width;
375 newrect.width += con->border_width * 2;
376 DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
377 event->width, newrect.width, con->border_width);
379 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
380 newrect.height = event->height + (-1) * bsr.height;
381 newrect.height += con->border_width * 2;
382 DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
383 event->height, newrect.height, con->border_width);
386 DLOG("Container is a floating leaf node, will do that.\n");
387 floating_reposition(floatingcon, newrect);
391 /* Dock windows can be reconfigured in their height */
392 if (con->parent && con->parent->type == CT_DOCKAREA) {
393 DLOG("Dock window, only height reconfiguration allowed\n");
394 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
395 DLOG("Height given, changing\n");
397 con->geometry.height = event->height;
402 fake_absolute_configure_notify(con);
409 * Configuration notifies are only handled because we need to set up ignore for
410 * the following enter notify events.
413 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
414 DLOG("configure_event, sequence %d\n", event->sequence);
415 /* We ignore this sequence twice because events for child and frame should be ignored */
416 add_ignore_event(event->sequence);
417 add_ignore_event(event->sequence);
424 * Gets triggered upon a RandR screen change event, that is when the user
425 * changes the screen configuration in any way (mode, position, …)
428 static void handle_screen_change(xcb_generic_event_t *e) {
429 DLOG("RandR screen change\n");
431 /* The geometry of the root window is used for “fullscreen global” and
432 * changes when new outputs are added. */
433 xcb_get_geometry_cookie_t cookie = xcb_get_geometry(conn, root);
434 xcb_get_geometry_reply_t *reply = xcb_get_geometry_reply(conn, cookie, NULL);
436 ELOG("Could not get geometry of the root window, exiting\n");
439 DLOG("root geometry reply: (%d, %d) %d x %d\n", reply->x, reply->y, reply->width, reply->height);
441 croot->rect.width = reply->width;
442 croot->rect.height = reply->height;
444 randr_query_outputs();
446 scratchpad_fix_resolution();
448 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
454 * Our window decorations were unmapped. That means, the window will be killed
455 * now, so we better clean up before.
458 static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
459 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
460 xcb_get_input_focus_cookie_t cookie;
461 Con *con = con_by_window_id(event->window);
463 /* This could also be an UnmapNotify for the frame. We need to
464 * decrement the ignore_unmap counter. */
465 con = con_by_frame_id(event->window);
467 LOG("Not a managed window, ignoring UnmapNotify event\n");
471 if (con->ignore_unmap > 0)
473 /* See the end of this function. */
474 cookie = xcb_get_input_focus(conn);
475 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
479 /* See the end of this function. */
480 cookie = xcb_get_input_focus(conn);
482 if (con->ignore_unmap > 0) {
483 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
488 tree_close(con, DONT_KILL_WINDOW, false, false);
490 x_push_changes(croot);
493 /* If the client (as opposed to i3) destroyed or unmapped a window, an
494 * EnterNotify event will follow (indistinguishable from an EnterNotify
495 * event caused by moving your mouse), causing i3 to set focus to whichever
496 * window is now visible.
498 * In a complex stacked or tabbed layout (take two v-split containers in a
499 * tabbed container), when the bottom window in tab2 is closed, the bottom
500 * window of tab1 is visible instead. X11 will thus send an EnterNotify
501 * event for the bottom window of tab1, while the focus should be set to
502 * the remaining window of tab2.
504 * Therefore, we ignore all EnterNotify events which have the same sequence
505 * as an UnmapNotify event. */
506 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
508 /* Since we just ignored the sequence of this UnmapNotify, we want to make
509 * sure that following events use a different sequence. When putting xterm
510 * into fullscreen and moving the pointer to a different window, without
511 * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
512 * with the same sequence and thus were ignored (see ticket #609). */
513 free(xcb_get_input_focus_reply(conn, cookie, NULL));
517 * A destroy notify event is sent when the window is not unmapped, but
518 * immediately destroyed (for example when starting a window and immediately
519 * killing the program which started it).
521 * We just pass on the event to the unmap notify handler (by copying the
522 * important fields in the event data structure).
525 static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
526 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
528 xcb_unmap_notify_event_t unmap;
529 unmap.sequence = event->sequence;
530 unmap.event = event->event;
531 unmap.window = event->window;
533 handle_unmap_notify_event(&unmap);
536 static bool window_name_changed(i3Window *window, char *old_name) {
537 if ((old_name == NULL) && (window->name == NULL))
540 /* Either the old or the new one is NULL, but not both. */
541 if ((old_name == NULL) ^ (window->name == NULL))
544 return (strcmp(old_name, i3string_as_utf8(window->name)) != 0);
548 * Called when a window changes its title
551 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
552 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
554 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
557 char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
559 window_update_name(con->window, prop, false);
561 x_push_changes(croot);
563 if (window_name_changed(con->window, old_name))
564 ipc_send_window_event("title", con);
572 * Handles legacy window name updates (WM_NAME), see also src/window.c,
573 * window_update_name_legacy().
576 static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
577 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
579 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
582 char *old_name = (con->window->name != NULL ? sstrdup(i3string_as_utf8(con->window->name)) : NULL);
584 window_update_name_legacy(con->window, prop, false);
586 x_push_changes(croot);
588 if (window_name_changed(con->window, old_name))
589 ipc_send_window_event("title", con);
597 * Called when a window changes its WM_WINDOW_ROLE.
600 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
601 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
603 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
606 window_update_role(con->window, prop, false);
613 * Updates the client’s WM_CLASS property
616 static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
617 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
619 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
622 window_update_class(con->window, prop, false);
629 * Expose event means we should redraw our windows (= title bar)
632 static void handle_expose_event(xcb_expose_event_t *event) {
635 DLOG("window = %08x\n", event->window);
637 if ((parent = con_by_frame_id(event->window)) == NULL) {
638 LOG("expose event for unknown window, ignoring\n");
642 /* Since we render to our pixmap on every change anyways, expose events
643 * only tell us that the X server lost (parts of) the window contents. We
644 * can handle that by copying the appropriate part from our pixmap to the
646 xcb_copy_area(conn, parent->pixmap, parent->frame, parent->pm_gc,
647 event->x, event->y, event->x, event->y,
648 event->width, event->height);
655 * Handle client messages (EWMH)
658 static void handle_client_message(xcb_client_message_event_t *event) {
659 /* If this is a startup notification ClientMessage, the library will handle
660 * it and call our monitor_event() callback. */
661 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t *)event))
664 LOG("ClientMessage for window 0x%08x\n", event->window);
665 if (event->type == A__NET_WM_STATE) {
666 if (event->format != 32 ||
667 (event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN &&
668 event->data.data32[1] != A__NET_WM_STATE_DEMANDS_ATTENTION)) {
669 DLOG("Unknown atom in clientmessage of type %d\n", event->data.data32[1]);
673 Con *con = con_by_window_id(event->window);
675 DLOG("Could not get window for client message\n");
679 if (event->data.data32[1] == A__NET_WM_STATE_FULLSCREEN) {
680 /* Check if the fullscreen state should be toggled */
681 if ((con->fullscreen_mode != CF_NONE &&
682 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
683 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
684 (con->fullscreen_mode == CF_NONE &&
685 (event->data.data32[0] == _NET_WM_STATE_ADD ||
686 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
687 DLOG("toggling fullscreen\n");
688 con_toggle_fullscreen(con, CF_OUTPUT);
690 } else if (event->data.data32[1] == A__NET_WM_STATE_DEMANDS_ATTENTION) {
691 /* Check if the urgent flag must be set or not */
692 if (event->data.data32[0] == _NET_WM_STATE_ADD)
693 con_set_urgency(con, true);
694 else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
695 con_set_urgency(con, false);
696 else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
697 con_set_urgency(con, !con->urgent);
701 } else if (event->type == A__NET_ACTIVE_WINDOW) {
702 if (event->format != 32)
705 DLOG("_NET_ACTIVE_WINDOW: Window 0x%08x should be activated\n", event->window);
707 Con *con = con_by_window_id(event->window);
709 DLOG("Could not get window for client message\n");
713 Con *ws = con_get_workspace(con);
716 DLOG("Window is not being managed, ignoring _NET_ACTIVE_WINDOW\n");
720 if (con_is_internal(ws)) {
721 DLOG("Workspace is internal, ignoring _NET_ACTIVE_WINDOW\n");
725 /* data32[0] indicates the source of the request (application or pager) */
726 if (event->data.data32[0] == 2) {
727 /* Always focus the con if it is from a pager, because this is most
728 * likely from some user action */
729 DLOG("This request came from a pager. Focusing con = %p\n", con);
733 /* If the request is from an application, only focus if the
734 * workspace is visible. Otherwise set the urgency hint. */
735 if (workspace_is_visible(ws)) {
736 DLOG("Request to focus con on a visible workspace. Focusing con = %p\n", con);
740 DLOG("Request to focus con on a hidden workspace. Setting urgent con = %p\n", con);
741 con_set_urgency(con, true);
746 } else if (event->type == A_I3_SYNC) {
747 xcb_window_t window = event->data.data32[0];
748 uint32_t rnd = event->data.data32[1];
749 DLOG("[i3 sync protocol] Sending random value %d back to X11 window 0x%08x\n", rnd, window);
751 void *reply = scalloc(32);
752 xcb_client_message_event_t *ev = reply;
754 ev->response_type = XCB_CLIENT_MESSAGE;
756 ev->type = A_I3_SYNC;
758 ev->data.data32[0] = window;
759 ev->data.data32[1] = rnd;
761 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char *)ev);
764 } else if (event->type == A__NET_REQUEST_FRAME_EXTENTS) {
766 * A client can request an estimate for the frame size which the window
767 * manager will put around it before actually mapping its window. Java
768 * does this (as of openjdk-7).
770 * Note that the calculation below is not entirely accurate — once you
771 * set a different border type, it’s off. We _could_ request all the
772 * window properties (which have to be set up at this point according
773 * to EWMH), but that seems rather elaborate. The standard explicitly
774 * says the application must cope with an estimate that is not entirely
777 DLOG("_NET_REQUEST_FRAME_EXTENTS for window 0x%08x\n", event->window);
779 /* The reply data: approximate frame size */
781 config.default_border_width, /* left */
782 config.default_border_width, /* right */
783 config.font.height + 5, /* top */
784 config.default_border_width /* bottom */
788 XCB_PROP_MODE_REPLACE,
790 A__NET_FRAME_EXTENTS,
791 XCB_ATOM_CARDINAL, 32, 4,
795 DLOG("unhandled clientmessage\n");
801 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
802 xcb_atom_t atom, xcb_get_property_reply_t *property) {
803 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
804 before changing this property. */
805 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
811 * Handles the size hints set by a window, but currently only the part necessary for displaying
812 * clients proportionally inside their frames (mplayer for example)
814 * See ICCCM 4.1.2.3 for more details
817 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
818 xcb_atom_t name, xcb_get_property_reply_t *reply) {
819 Con *con = con_by_window_id(window);
821 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
825 xcb_size_hints_t size_hints;
827 //CLIENT_LOG(client);
829 /* If the hints were already in this event, use them, if not, request them */
831 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
833 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
835 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
836 // TODO: Minimum size is not yet implemented
837 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
840 bool changed = false;
841 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
842 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
843 if (con->width_increment != size_hints.width_inc) {
844 con->width_increment = size_hints.width_inc;
847 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
848 if (con->height_increment != size_hints.height_inc) {
849 con->height_increment = size_hints.height_inc;
854 DLOG("resize increments changed\n");
857 int base_width = 0, base_height = 0;
859 /* base_width/height are the desired size of the window.
860 We check if either the program-specified size or the program-specified
861 min-size is available */
862 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
863 base_width = size_hints.base_width;
864 base_height = size_hints.base_height;
865 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
866 /* TODO: is this right? icccm says not */
867 base_width = size_hints.min_width;
868 base_height = size_hints.min_height;
871 if (base_width != con->base_width ||
872 base_height != con->base_height) {
873 con->base_width = base_width;
874 con->base_height = base_height;
875 DLOG("client's base_height changed to %d\n", base_height);
876 DLOG("client's base_width changed to %d\n", base_width);
880 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
881 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
882 (size_hints.min_aspect_num <= 0) ||
883 (size_hints.min_aspect_den <= 0)) {
884 goto render_and_return;
887 /* XXX: do we really use rect here, not window_rect? */
888 double width = con->rect.width - base_width;
889 double height = con->rect.height - base_height;
890 /* Convert numerator/denominator to a double */
891 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
892 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
894 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
895 DLOG("width = %f, height = %f\n", width, height);
897 /* Sanity checks, this is user-input, in a way */
898 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
899 goto render_and_return;
901 /* Check if we need to set proportional_* variables using the correct ratio */
902 double aspect_ratio = 0.0;
903 if ((width / height) < min_aspect) {
904 aspect_ratio = min_aspect;
905 } else if ((width / height) > max_aspect) {
906 aspect_ratio = max_aspect;
908 goto render_and_return;
910 if (fabs(con->aspect_ratio - aspect_ratio) > DBL_EPSILON) {
911 con->aspect_ratio = aspect_ratio;
923 * Handles the WM_HINTS property for extracting the urgency state of the window.
926 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
927 xcb_atom_t name, xcb_get_property_reply_t *reply) {
928 Con *con = con_by_window_id(window);
930 DLOG("Received WM_HINTS for unknown client\n");
936 reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL);
937 window_update_hints(con->window, reply, &urgency_hint);
938 con_set_urgency(con, urgency_hint);
945 * Handles the transient for hints set by a window, signalizing that this window is a popup window
946 * for some other window.
948 * See ICCCM 4.1.2.6 for more details
951 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
952 xcb_atom_t name, xcb_get_property_reply_t *prop) {
955 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
956 DLOG("No such window\n");
961 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
962 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32),
968 window_update_transient_for(con->window, prop);
974 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
975 * toolwindow (or similar) and to which window it belongs (logical parent).
978 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
979 xcb_atom_t name, xcb_get_property_reply_t *prop) {
981 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
985 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
986 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32),
992 window_update_leader(con->window, prop);
998 * Handles FocusIn events which are generated by clients (i3’s focus changes
999 * don’t generate FocusIn events due to a different EventMask) and updates the
1000 * decorations accordingly.
1003 static void handle_focus_in(xcb_focus_in_event_t *event) {
1004 DLOG("focus change in, for window 0x%08x\n", event->event);
1006 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
1008 DLOG("That is con %p / %s\n", con, con->name);
1010 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
1011 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
1012 DLOG("FocusIn event for grab/ungrab, ignoring\n");
1016 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
1017 DLOG("notify detail is pointer, ignoring this event\n");
1021 if (focused_id == event->event) {
1022 DLOG("focus matches the currently focused window, not doing anything\n");
1026 /* Skip dock clients, they cannot get the i3 focus. */
1027 if (con->parent->type == CT_DOCKAREA) {
1028 DLOG("This is a dock client, not focusing.\n");
1032 DLOG("focus is different, updating decorations\n");
1034 /* Get the currently focused workspace to check if the focus change also
1035 * involves changing workspaces. If so, we need to call workspace_show() to
1036 * correctly update state and send the IPC event. */
1037 Con *ws = con_get_workspace(con);
1038 if (ws != con_get_workspace(focused))
1042 /* We update focused_id because we don’t need to set focus again */
1043 focused_id = event->event;
1044 x_push_changes(croot);
1048 /* Returns false if the event could not be processed (e.g. the window could not
1049 * be found), true otherwise */
1050 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);
1052 struct property_handler_t {
1055 cb_property_handler_t cb;
1058 static struct property_handler_t property_handlers[] = {
1059 {0, 128, handle_windowname_change},
1060 {0, UINT_MAX, handle_hints},
1061 {0, 128, handle_windowname_change_legacy},
1062 {0, UINT_MAX, handle_normal_hints},
1063 {0, UINT_MAX, handle_clientleader_change},
1064 {0, UINT_MAX, handle_transient_for},
1065 {0, 128, handle_windowrole_change}};
1066 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
1069 * Sets the appropriate atoms for the property handlers after the atoms were
1073 void property_handlers_init(void) {
1074 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
1076 property_handlers[0].atom = A__NET_WM_NAME;
1077 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1078 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1079 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1080 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1081 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1082 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1085 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1086 struct property_handler_t *handler = NULL;
1087 xcb_get_property_reply_t *propr = NULL;
1089 for (size_t c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1090 if (property_handlers[c].atom != atom)
1093 handler = &property_handlers[c];
1097 if (handler == NULL) {
1098 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1102 if (state != XCB_PROPERTY_DELETE) {
1103 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1104 propr = xcb_get_property_reply(conn, cookie, 0);
1107 /* the handler will free() the reply unless it returns false */
1108 if (!handler->cb(NULL, conn, state, window, atom, propr))
1113 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1117 void handle_event(int type, xcb_generic_event_t *event) {
1118 if (randr_base > -1 &&
1119 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1120 handle_screen_change(event);
1126 case XCB_KEY_RELEASE:
1127 handle_key_press((xcb_key_press_event_t *)event);
1130 case XCB_BUTTON_PRESS:
1131 handle_button_press((xcb_button_press_event_t *)event);
1134 case XCB_MAP_REQUEST:
1135 handle_map_request((xcb_map_request_event_t *)event);
1138 case XCB_UNMAP_NOTIFY:
1139 handle_unmap_notify_event((xcb_unmap_notify_event_t *)event);
1142 case XCB_DESTROY_NOTIFY:
1143 handle_destroy_notify_event((xcb_destroy_notify_event_t *)event);
1147 handle_expose_event((xcb_expose_event_t *)event);
1150 case XCB_MOTION_NOTIFY:
1151 handle_motion_notify((xcb_motion_notify_event_t *)event);
1154 /* Enter window = user moved his mouse over the window */
1155 case XCB_ENTER_NOTIFY:
1156 handle_enter_notify((xcb_enter_notify_event_t *)event);
1159 /* Client message are sent to the root window. The only interesting
1160 * client message for us is _NET_WM_STATE, we honour
1161 * _NET_WM_STATE_FULLSCREEN and _NET_WM_STATE_DEMANDS_ATTENTION */
1162 case XCB_CLIENT_MESSAGE:
1163 handle_client_message((xcb_client_message_event_t *)event);
1166 /* Configure request = window tried to change size on its own */
1167 case XCB_CONFIGURE_REQUEST:
1168 handle_configure_request((xcb_configure_request_event_t *)event);
1171 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1172 case XCB_MAPPING_NOTIFY:
1173 handle_mapping_notify((xcb_mapping_notify_event_t *)event);
1177 handle_focus_in((xcb_focus_in_event_t *)event);
1180 case XCB_PROPERTY_NOTIFY: {
1181 xcb_property_notify_event_t *e = (xcb_property_notify_event_t *)event;
1182 last_timestamp = e->time;
1183 property_notify(e->state, e->window, e->atom);
1188 //DLOG("Unhandled event of type %d\n", type);