2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
7 * handlers.c: Small handlers for various events (keypresses, focus changes,
14 #include <xcb/randr.h>
15 #include <X11/XKBlib.h>
16 #define SN_API_NOT_YET_FROZEN 1
17 #include <libsn/sn-monitor.h>
21 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
22 since it’d trigger an infinite loop of switching between the different windows when
23 changing workspaces */
24 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
27 * Adds the given sequence to the list of events which are ignored.
28 * If this ignore should only affect a specific response_type, pass
29 * response_type, otherwise, pass -1.
31 * Every ignored sequence number gets garbage collected after 5 seconds.
34 void add_ignore_event(const int sequence, const int response_type) {
35 struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
37 event->sequence = sequence;
38 event->response_type = response_type;
39 event->added = time(NULL);
41 SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
45 * Checks if the given sequence is ignored and returns true if so.
48 bool event_is_ignored(const int sequence, const int response_type) {
49 struct Ignore_Event *event;
50 time_t now = time(NULL);
51 for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
52 if ((now - event->added) > 5) {
53 struct Ignore_Event *save = event;
54 event = SLIST_NEXT(event, ignore_events);
55 SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
57 } else event = SLIST_NEXT(event, ignore_events);
60 SLIST_FOREACH(event, &ignore_events, ignore_events) {
61 if (event->sequence != sequence)
64 if (event->response_type != -1 &&
65 event->response_type != response_type)
68 /* instead of removing a sequence number we better wait until it gets
69 * garbage collected. it may generate multiple events (there are multiple
70 * enter_notifies for one configure_request, for example). */
71 //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
81 * There was a key press. We compare this key code with our bindings table and pass
82 * the bound action to parse_command().
85 static void handle_key_press(xcb_key_press_event_t *event) {
87 last_timestamp = event->time;
89 DLOG("Keypress %d, state raw = %d\n", event->detail, event->state);
91 /* Remove the numlock bit, all other bits are modifiers we can bind to */
92 uint16_t state_filtered = event->state & ~(xcb_numlock_mask | XCB_MOD_MASK_LOCK);
93 DLOG("(removed numlock, state = %d)\n", state_filtered);
94 /* Only use the lower 8 bits of the state (modifier masks) so that mouse
95 * button masks are filtered out */
96 state_filtered &= 0xFF;
97 DLOG("(removed upper 8 bits, state = %d)\n", state_filtered);
99 if (xkb_current_group == XkbGroup2Index)
100 state_filtered |= BIND_MODE_SWITCH;
102 DLOG("(checked mode_switch, state %d)\n", state_filtered);
104 /* Find the binding */
105 Binding *bind = get_binding(state_filtered, event->detail);
107 /* No match? Then the user has Mode_switch enabled but does not have a
108 * specific keybinding. Fall back to the default keybindings (without
109 * Mode_switch). Makes it much more convenient for users of a hybrid
110 * layout (like us, ru). */
112 state_filtered &= ~(BIND_MODE_SWITCH);
113 DLOG("no match, new state_filtered = %d\n", state_filtered);
114 if ((bind = get_binding(state_filtered, event->detail)) == NULL) {
115 ELOG("Could not lookup key binding (modifiers %d, keycode %d)\n",
116 state_filtered, event->detail);
121 char *json_result = parse_command(bind->command);
127 * Called with coordinates of an enter_notify event or motion_notify event
128 * to check if the user crossed virtual screen boundaries and adjust the
129 * current workspace, if so.
132 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
135 /* If the user disable focus follows mouse, we have nothing to do here */
136 if (config.disable_focus_follows_mouse)
139 if ((output = get_output_containing(x, y)) == NULL) {
140 ELOG("ERROR: No such screen\n");
144 if (output->con == NULL) {
145 ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
149 /* Focus the output on which the user moved his cursor */
150 Con *old_focused = focused;
151 Con *next = con_descend_focused(output_get_content(output->con));
152 /* Since we are switching outputs, this *must* be a different workspace, so
153 * call workspace_show() */
154 workspace_show(con_get_workspace(next));
157 /* If the focus changed, we re-render to get updated decorations */
158 if (old_focused != focused)
163 * When the user moves the mouse pointer onto a window, this callback gets called.
166 static void handle_enter_notify(xcb_enter_notify_event_t *event) {
169 last_timestamp = event->time;
171 DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
172 event->event, event->mode, event->detail, event->sequence);
173 DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
174 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
175 DLOG("This was not a normal notify, ignoring\n");
178 /* Some events are not interesting, because they were not generated
179 * actively by the user, but by reconfiguration of windows */
180 if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
181 DLOG("Event ignored\n");
185 bool enter_child = false;
186 /* Get container by frame or by child window */
187 if ((con = con_by_frame_id(event->event)) == NULL) {
188 con = con_by_window_id(event->event);
192 /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
194 DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
195 check_crossing_screen_boundary(event->root_x, event->root_y);
199 if (con->parent->type == CT_DOCKAREA) {
200 DLOG("Ignoring, this is a dock client\n");
204 /* see if the user entered the window on a certain window decoration */
205 int layout = (enter_child ? con->parent->layout : con->layout);
206 if (layout == L_DEFAULT) {
208 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
209 if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
210 LOG("using child %p / %s instead!\n", child, child->name);
217 if (client->workspace != c_ws && client->workspace->output == c_ws->output) {
218 /* This can happen when a client gets assigned to a different workspace than
219 * the current one (see src/mainx.c:reparent_window). Shortly after it was created,
220 * an enter_notify will follow. */
221 DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
226 if (config.disable_focus_follows_mouse)
229 /* Get the currently focused workspace to check if the focus change also
230 * involves changing workspaces. If so, we need to call workspace_show() to
231 * correctly update state and send the IPC event. */
232 Con *ws = con_get_workspace(con);
233 if (ws != con_get_workspace(focused))
236 con_focus(con_descend_focused(con));
243 * When the user moves the mouse but does not change the active window
244 * (e.g. when having no windows opened but moving mouse on the root screen
245 * and crossing virtual screen boundaries), this callback gets called.
248 static void handle_motion_notify(xcb_motion_notify_event_t *event) {
250 last_timestamp = event->time;
252 /* Skip events where the pointer was over a child window, we are only
253 * interested in events on the root window. */
254 if (event->child != 0)
258 if ((con = con_by_frame_id(event->event)) == NULL) {
259 check_crossing_screen_boundary(event->root_x, event->root_y);
263 if (config.disable_focus_follows_mouse)
266 if (con->layout != L_DEFAULT)
269 /* see over which rect the user is */
271 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
272 if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
275 /* We found the rect, let’s see if this window is focused */
276 if (TAILQ_FIRST(&(con->focus_head)) == current)
280 x_push_changes(croot);
288 * Called when the keyboard mapping changes (for example by using Xmodmap),
289 * we need to update our key bindings then (re-translate symbols).
292 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
293 if (event->request != XCB_MAPPING_KEYBOARD &&
294 event->request != XCB_MAPPING_MODIFIER)
297 DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
298 xcb_refresh_keyboard_mapping(keysyms, event);
300 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
302 ungrab_all_keys(conn);
304 grab_all_keys(conn, false);
310 * A new window appeared on the screen (=was mapped), so let’s manage it.
313 static void handle_map_request(xcb_map_request_event_t *event) {
314 xcb_get_window_attributes_cookie_t cookie;
316 cookie = xcb_get_window_attributes_unchecked(conn, event->window);
318 DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
319 add_ignore_event(event->sequence, -1);
321 manage_window(event->window, cookie, false);
322 x_push_changes(croot);
327 * Configure requests are received when the application wants to resize windows
330 * We generate a synthethic configure notify event to signalize the client its
334 static void handle_configure_request(xcb_configure_request_event_t *event) {
337 DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
338 event->window, event->x, event->y, event->width, event->height);
340 /* For unmanaged windows, we just execute the configure request. As soon as
341 * it gets mapped, we will take over anyways. */
342 if ((con = con_by_window_id(event->window)) == NULL) {
343 DLOG("Configure request for unmanaged window, can do that.\n");
348 #define COPY_MASK_MEMBER(mask_member, event_member) do { \
349 if (event->value_mask & mask_member) { \
350 mask |= mask_member; \
351 values[c++] = event->event_member; \
355 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
356 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
357 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
358 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
359 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
360 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
361 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
363 xcb_configure_window(conn, event->window, mask, values);
369 DLOG("Configure request!\n");
370 if (con_is_floating(con) && con_is_leaf(con)) {
371 /* find the height for the decorations */
372 int deco_height = config.font.height + 5;
373 /* we actually need to apply the size/position changes to the *parent*
375 Rect bsr = con_border_style_rect(con);
376 if (con->border_style == BS_NORMAL) {
377 bsr.y += deco_height;
378 bsr.height -= deco_height;
380 Con *floatingcon = con->parent;
382 Rect newrect = floatingcon->rect;
384 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
385 newrect.x = event->x + (-1) * bsr.x;
386 DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
388 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
389 newrect.y = event->y + (-1) * bsr.y;
390 DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
392 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
393 newrect.width = event->width + (-1) * bsr.width;
394 newrect.width += con->border_width * 2;
395 DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
396 event->width, newrect.width, con->border_width);
398 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
399 newrect.height = event->height + (-1) * bsr.height;
400 newrect.height += con->border_width * 2;
401 DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
402 event->height, newrect.height, con->border_width);
405 DLOG("Container is a floating leaf node, will do that.\n");
406 floating_reposition(floatingcon, newrect);
410 /* Dock windows can be reconfigured in their height */
411 if (con->parent && con->parent->type == CT_DOCKAREA) {
412 DLOG("Dock window, only height reconfiguration allowed\n");
413 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
414 DLOG("Height given, changing\n");
416 con->geometry.height = event->height;
421 fake_absolute_configure_notify(con);
428 * Configuration notifies are only handled because we need to set up ignore for
429 * the following enter notify events.
432 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
433 DLOG("configure_event, sequence %d\n", event->sequence);
434 /* We ignore this sequence twice because events for child and frame should be ignored */
435 add_ignore_event(event->sequence);
436 add_ignore_event(event->sequence);
443 * Gets triggered upon a RandR screen change event, that is when the user
444 * changes the screen configuration in any way (mode, position, …)
447 static void handle_screen_change(xcb_generic_event_t *e) {
448 DLOG("RandR screen change\n");
450 randr_query_outputs();
452 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
458 * Our window decorations were unmapped. That means, the window will be killed
459 * now, so we better clean up before.
462 static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
463 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
464 xcb_get_input_focus_cookie_t cookie;
465 Con *con = con_by_window_id(event->window);
467 /* This could also be an UnmapNotify for the frame. We need to
468 * decrement the ignore_unmap counter. */
469 con = con_by_frame_id(event->window);
471 LOG("Not a managed window, ignoring UnmapNotify event\n");
475 if (con->ignore_unmap > 0)
477 /* See the end of this function. */
478 cookie = xcb_get_input_focus(conn);
479 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
483 /* See the end of this function. */
484 cookie = xcb_get_input_focus(conn);
486 if (con->ignore_unmap > 0) {
487 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
492 tree_close(con, DONT_KILL_WINDOW, false, false);
494 x_push_changes(croot);
497 /* If the client (as opposed to i3) destroyed or unmapped a window, an
498 * EnterNotify event will follow (indistinguishable from an EnterNotify
499 * event caused by moving your mouse), causing i3 to set focus to whichever
500 * window is now visible.
502 * In a complex stacked or tabbed layout (take two v-split containers in a
503 * tabbed container), when the bottom window in tab2 is closed, the bottom
504 * window of tab1 is visible instead. X11 will thus send an EnterNotify
505 * event for the bottom window of tab1, while the focus should be set to
506 * the remaining window of tab2.
508 * Therefore, we ignore all EnterNotify events which have the same sequence
509 * as an UnmapNotify event. */
510 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
512 /* Since we just ignored the sequence of this UnmapNotify, we want to make
513 * sure that following events use a different sequence. When putting xterm
514 * into fullscreen and moving the pointer to a different window, without
515 * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
516 * with the same sequence and thus were ignored (see ticket #609). */
517 free(xcb_get_input_focus_reply(conn, cookie, NULL));
521 * A destroy notify event is sent when the window is not unmapped, but
522 * immediately destroyed (for example when starting a window and immediately
523 * killing the program which started it).
525 * We just pass on the event to the unmap notify handler (by copying the
526 * important fields in the event data structure).
529 static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
530 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
532 xcb_unmap_notify_event_t unmap;
533 unmap.sequence = event->sequence;
534 unmap.event = event->event;
535 unmap.window = event->window;
537 handle_unmap_notify_event(&unmap);
541 * Called when a window changes its title
544 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
545 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
547 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
550 window_update_name(con->window, prop, false);
552 x_push_changes(croot);
558 * Handles legacy window name updates (WM_NAME), see also src/window.c,
559 * window_update_name_legacy().
562 static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
563 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
565 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
568 window_update_name_legacy(con->window, prop, false);
570 x_push_changes(croot);
576 * Called when a window changes its WM_WINDOW_ROLE.
579 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
580 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
582 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
585 window_update_role(con->window, prop, false);
592 * Updates the client’s WM_CLASS property
595 static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
596 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
598 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
601 window_update_class(con->window, prop, false);
608 * Expose event means we should redraw our windows (= title bar)
611 static void handle_expose_event(xcb_expose_event_t *event) {
614 DLOG("window = %08x\n", event->window);
616 if ((parent = con_by_frame_id(event->window)) == NULL) {
617 LOG("expose event for unknown window, ignoring\n");
621 /* Since we render to our pixmap on every change anyways, expose events
622 * only tell us that the X server lost (parts of) the window contents. We
623 * can handle that by copying the appropriate part from our pixmap to the
625 xcb_copy_area(conn, parent->pixmap, parent->frame, parent->pm_gc,
626 event->x, event->y, event->x, event->y,
627 event->width, event->height);
634 * Handle client messages (EWMH)
637 static void handle_client_message(xcb_client_message_event_t *event) {
638 /* If this is a startup notification ClientMessage, the library will handle
639 * it and call our monitor_event() callback. */
640 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t*)event))
643 LOG("ClientMessage for window 0x%08x\n", event->window);
644 if (event->type == A__NET_WM_STATE) {
645 if (event->format != 32 || event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN) {
646 DLOG("atom in clientmessage is %d, fullscreen is %d\n",
647 event->data.data32[1], A__NET_WM_STATE_FULLSCREEN);
648 DLOG("not about fullscreen atom\n");
652 Con *con = con_by_window_id(event->window);
654 DLOG("Could not get window for client message\n");
658 /* Check if the fullscreen state should be toggled */
659 if ((con->fullscreen_mode != CF_NONE &&
660 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
661 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
662 (con->fullscreen_mode == CF_NONE &&
663 (event->data.data32[0] == _NET_WM_STATE_ADD ||
664 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
665 DLOG("toggling fullscreen\n");
666 con_toggle_fullscreen(con, CF_OUTPUT);
670 x_push_changes(croot);
671 } else if (event->type == A_I3_SYNC) {
672 DLOG("i3 sync, yay\n");
673 xcb_window_t window = event->data.data32[0];
674 uint32_t rnd = event->data.data32[1];
675 DLOG("Sending random value %d back to X11 window 0x%08x\n", rnd, window);
677 void *reply = scalloc(32);
678 xcb_client_message_event_t *ev = reply;
680 ev->response_type = XCB_CLIENT_MESSAGE;
682 ev->type = A_I3_SYNC;
684 ev->data.data32[0] = window;
685 ev->data.data32[1] = rnd;
687 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
691 DLOG("unhandled clientmessage\n");
697 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
698 xcb_atom_t atom, xcb_get_property_reply_t *property) {
699 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
700 before changing this property. */
701 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
707 * Handles the size hints set by a window, but currently only the part necessary for displaying
708 * clients proportionally inside their frames (mplayer for example)
710 * See ICCCM 4.1.2.3 for more details
713 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
714 xcb_atom_t name, xcb_get_property_reply_t *reply) {
715 Con *con = con_by_window_id(window);
717 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
721 xcb_size_hints_t size_hints;
723 //CLIENT_LOG(client);
725 /* If the hints were already in this event, use them, if not, request them */
727 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
729 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
731 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
732 // TODO: Minimum size is not yet implemented
733 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
736 bool changed = false;
737 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
738 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
739 if (con->width_increment != size_hints.width_inc) {
740 con->width_increment = size_hints.width_inc;
743 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
744 if (con->height_increment != size_hints.height_inc) {
745 con->height_increment = size_hints.height_inc;
750 DLOG("resize increments changed\n");
753 int base_width = 0, base_height = 0;
755 /* base_width/height are the desired size of the window.
756 We check if either the program-specified size or the program-specified
757 min-size is available */
758 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
759 base_width = size_hints.base_width;
760 base_height = size_hints.base_height;
761 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
762 /* TODO: is this right? icccm says not */
763 base_width = size_hints.min_width;
764 base_height = size_hints.min_height;
767 if (base_width != con->base_width ||
768 base_height != con->base_height) {
769 con->base_width = base_width;
770 con->base_height = base_height;
771 DLOG("client's base_height changed to %d\n", base_height);
772 DLOG("client's base_width changed to %d\n", base_width);
776 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
777 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
778 (size_hints.min_aspect_num <= 0) ||
779 (size_hints.min_aspect_den <= 0)) {
780 goto render_and_return;
783 /* XXX: do we really use rect here, not window_rect? */
784 double width = con->rect.width - base_width;
785 double height = con->rect.height - base_height;
786 /* Convert numerator/denominator to a double */
787 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
788 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
790 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
791 DLOG("width = %f, height = %f\n", width, height);
793 /* Sanity checks, this is user-input, in a way */
794 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
795 goto render_and_return;
797 /* Check if we need to set proportional_* variables using the correct ratio */
798 if ((width / height) < min_aspect) {
799 if (con->proportional_width != width ||
800 con->proportional_height != (width / min_aspect)) {
801 con->proportional_width = width;
802 con->proportional_height = width / min_aspect;
805 } else if ((width / height) > max_aspect) {
806 if (con->proportional_width != width ||
807 con->proportional_height != (width / max_aspect)) {
808 con->proportional_width = width;
809 con->proportional_height = width / max_aspect;
812 } else goto render_and_return;
822 * Handles the WM_HINTS property for extracting the urgency state of the window.
825 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
826 xcb_atom_t name, xcb_get_property_reply_t *reply) {
827 Con *con = con_by_window_id(window);
829 DLOG("Received WM_HINTS for unknown client\n");
833 xcb_icccm_wm_hints_t hints;
836 if (!(reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL)))
839 if (!xcb_icccm_get_wm_hints_from_reply(&hints, reply))
842 if (!con->urgent && focused == con) {
843 DLOG("Ignoring urgency flag for current client\n");
847 /* Update the flag on the client directly */
848 con->urgent = (xcb_icccm_wm_hints_get_urgency(&hints) != 0);
850 LOG("Urgency flag changed to %d\n", con->urgent);
853 /* Set the urgency flag on the workspace, if a workspace could be found
854 * (for dock clients, that is not the case). */
855 if ((ws = con_get_workspace(con)) != NULL)
856 workspace_update_urgent_flag(ws);
862 window_update_hints(con->window, reply);
868 * Handles the transient for hints set by a window, signalizing that this window is a popup window
869 * for some other window.
871 * See ICCCM 4.1.2.6 for more details
874 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
875 xcb_atom_t name, xcb_get_property_reply_t *prop) {
878 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
879 DLOG("No such window\n");
884 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
885 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32), NULL);
890 window_update_transient_for(con->window, prop);
896 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
897 * toolwindow (or similar) and to which window it belongs (logical parent).
900 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
901 xcb_atom_t name, xcb_get_property_reply_t *prop) {
903 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
907 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
908 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32), NULL);
913 window_update_leader(con->window, prop);
919 * Handles FocusIn events which are generated by clients (i3’s focus changes
920 * don’t generate FocusIn events due to a different EventMask) and updates the
921 * decorations accordingly.
924 static void handle_focus_in(xcb_focus_in_event_t *event) {
925 DLOG("focus change in, for window 0x%08x\n", event->event);
927 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
929 DLOG("That is con %p / %s\n", con, con->name);
931 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
932 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
933 DLOG("FocusIn event for grab/ungrab, ignoring\n");
937 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
938 DLOG("notify detail is pointer, ignoring this event\n");
942 if (focused_id == event->event) {
943 DLOG("focus matches the currently focused window, not doing anything\n");
947 /* Skip dock clients, they cannot get the i3 focus. */
948 if (con->parent->type == CT_DOCKAREA) {
949 DLOG("This is a dock client, not focusing.\n");
953 DLOG("focus is different, updating decorations\n");
955 /* Get the currently focused workspace to check if the focus change also
956 * involves changing workspaces. If so, we need to call workspace_show() to
957 * correctly update state and send the IPC event. */
958 Con *ws = con_get_workspace(con);
959 if (ws != con_get_workspace(focused))
963 /* We update focused_id because we don’t need to set focus again */
964 focused_id = event->event;
965 x_push_changes(croot);
969 /* Returns false if the event could not be processed (e.g. the window could not
970 * be found), true otherwise */
971 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);
973 struct property_handler_t {
976 cb_property_handler_t cb;
979 static struct property_handler_t property_handlers[] = {
980 { 0, 128, handle_windowname_change },
981 { 0, UINT_MAX, handle_hints },
982 { 0, 128, handle_windowname_change_legacy },
983 { 0, UINT_MAX, handle_normal_hints },
984 { 0, UINT_MAX, handle_clientleader_change },
985 { 0, UINT_MAX, handle_transient_for },
986 { 0, 128, handle_windowrole_change }
988 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
991 * Sets the appropriate atoms for the property handlers after the atoms were
995 void property_handlers_init() {
997 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
999 property_handlers[0].atom = A__NET_WM_NAME;
1000 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1001 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1002 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1003 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1004 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1005 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1008 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1009 struct property_handler_t *handler = NULL;
1010 xcb_get_property_reply_t *propr = NULL;
1012 for (int c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1013 if (property_handlers[c].atom != atom)
1016 handler = &property_handlers[c];
1020 if (handler == NULL) {
1021 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1025 if (state != XCB_PROPERTY_DELETE) {
1026 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1027 propr = xcb_get_property_reply(conn, cookie, 0);
1030 /* the handler will free() the reply unless it returns false */
1031 if (!handler->cb(NULL, conn, state, window, atom, propr))
1036 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1040 void handle_event(int type, xcb_generic_event_t *event) {
1041 if (randr_base > -1 &&
1042 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1043 handle_screen_change(event);
1049 handle_key_press((xcb_key_press_event_t*)event);
1052 case XCB_BUTTON_PRESS:
1053 handle_button_press((xcb_button_press_event_t*)event);
1056 case XCB_MAP_REQUEST:
1057 handle_map_request((xcb_map_request_event_t*)event);
1060 case XCB_UNMAP_NOTIFY:
1061 handle_unmap_notify_event((xcb_unmap_notify_event_t*)event);
1064 case XCB_DESTROY_NOTIFY:
1065 handle_destroy_notify_event((xcb_destroy_notify_event_t*)event);
1069 handle_expose_event((xcb_expose_event_t*)event);
1072 case XCB_MOTION_NOTIFY:
1073 handle_motion_notify((xcb_motion_notify_event_t*)event);
1076 /* Enter window = user moved his mouse over the window */
1077 case XCB_ENTER_NOTIFY:
1078 handle_enter_notify((xcb_enter_notify_event_t*)event);
1081 /* Client message are sent to the root window. The only interesting
1082 * client message for us is _NET_WM_STATE, we honour
1083 * _NET_WM_STATE_FULLSCREEN */
1084 case XCB_CLIENT_MESSAGE:
1085 handle_client_message((xcb_client_message_event_t*)event);
1088 /* Configure request = window tried to change size on its own */
1089 case XCB_CONFIGURE_REQUEST:
1090 handle_configure_request((xcb_configure_request_event_t*)event);
1093 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1094 case XCB_MAPPING_NOTIFY:
1095 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
1099 handle_focus_in((xcb_focus_in_event_t*)event);
1102 case XCB_PROPERTY_NOTIFY: {
1103 xcb_property_notify_event_t *e = (xcb_property_notify_event_t*)event;
1104 last_timestamp = e->time;
1105 property_notify(e->state, e->window, e->atom);
1110 //DLOG("Unhandled event of type %d\n", type);