2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2011 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 int 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_cmd(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 int 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 int 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 int 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 int 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 on their own.
329 * We generate a synthethic configure notify event to signalize the client its "new" position.
332 static int handle_configure_request(xcb_configure_request_event_t *event) {
335 DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
336 event->window, event->x, event->y, event->width, event->height);
338 /* For unmanaged windows, we just execute the configure request. As soon as
339 * it gets mapped, we will take over anyways. */
340 if ((con = con_by_window_id(event->window)) == NULL) {
341 DLOG("Configure request for unmanaged window, can do that.\n");
346 #define COPY_MASK_MEMBER(mask_member, event_member) do { \
347 if (event->value_mask & mask_member) { \
348 mask |= mask_member; \
349 values[c++] = event->event_member; \
353 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
354 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
355 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
356 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
357 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
358 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
359 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
361 xcb_configure_window(conn, event->window, mask, values);
367 DLOG("Configure request!\n");
368 if (con_is_floating(con) && con_is_leaf(con)) {
369 /* find the height for the decorations */
370 int deco_height = config.font.height + 5;
371 /* we actually need to apply the size/position changes to the *parent*
373 Rect bsr = con_border_style_rect(con);
374 if (con->border_style == BS_NORMAL) {
375 bsr.y += deco_height;
376 bsr.height -= deco_height;
378 Con *floatingcon = con->parent;
380 Rect newrect = floatingcon->rect;
382 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
383 newrect.x = event->x + (-1) * bsr.x;
384 DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
386 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
387 newrect.y = event->y + (-1) * bsr.y;
388 DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
390 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
391 newrect.width = event->width + (-1) * bsr.width;
392 newrect.width += con->border_width * 2;
393 DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
394 event->width, newrect.width, con->border_width);
396 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
397 newrect.height = event->height + (-1) * bsr.height;
398 newrect.height += con->border_width * 2;
399 DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
400 event->height, newrect.height, con->border_width);
403 DLOG("Container is a floating leaf node, will do that.\n");
404 floating_reposition(floatingcon, newrect);
408 /* Dock windows can be reconfigured in their height */
409 if (con->parent && con->parent->type == CT_DOCKAREA) {
410 DLOG("Dock window, only height reconfiguration allowed\n");
411 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
412 DLOG("Height given, changing\n");
414 con->geometry.height = event->height;
419 fake_absolute_configure_notify(con);
426 * Configuration notifies are only handled because we need to set up ignore for
427 * the following enter notify events.
430 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
431 DLOG("configure_event, sequence %d\n", event->sequence);
432 /* We ignore this sequence twice because events for child and frame should be ignored */
433 add_ignore_event(event->sequence);
434 add_ignore_event(event->sequence);
441 * Gets triggered upon a RandR screen change event, that is when the user
442 * changes the screen configuration in any way (mode, position, …)
445 static int handle_screen_change(xcb_generic_event_t *e) {
446 DLOG("RandR screen change\n");
448 randr_query_outputs();
450 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
456 * Our window decorations were unmapped. That means, the window will be killed
457 * now, so we better clean up before.
460 static int handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
461 /* If the client (as opposed to i3) destroyed or unmapped a window, an
462 * EnterNotify event will follow (indistinguishable from an EnterNotify
463 * event caused by moving your mouse), causing i3 to set focus to whichever
464 * window is now visible.
466 * In a complex stacked or tabbed layout (take two v-split containers in a
467 * tabbed container), when the bottom window in tab2 is closed, the bottom
468 * window of tab1 is visible instead. X11 will thus send an EnterNotify
469 * event for the bottom window of tab1, while the focus should be set to
470 * the remaining window of tab2.
472 * Therefore, we ignore all EnterNotify events which have the same sequence
473 * as an UnmapNotify event. */
474 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
476 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
477 Con *con = con_by_window_id(event->window);
479 /* This could also be an UnmapNotify for the frame. We need to
480 * decrement the ignore_unmap counter. */
481 con = con_by_frame_id(event->window);
483 LOG("Not a managed window, ignoring UnmapNotify event\n");
486 if (con->ignore_unmap > 0)
488 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
492 if (con->ignore_unmap > 0) {
493 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
498 tree_close(con, DONT_KILL_WINDOW, false, false);
500 x_push_changes(croot);
504 if (client == NULL) {
505 DLOG("not a managed window. Ignoring.\n");
507 /* This was most likely the destroyed frame of a client which is
508 * currently being unmapped, so we add this sequence (again!) to
509 * the ignore list (enter_notify events will get sent for both,
510 * the child and its frame). */
511 add_ignore_event(event->sequence);
519 /* Let’s see how many clients there are left on the workspace to delete it if it’s empty */
520 bool workspace_empty = SLIST_EMPTY(&(client->workspace->focus_stack));
521 bool workspace_focused = (c_ws == client->workspace);
522 Client *to_focus = (!workspace_empty ? SLIST_FIRST(&(client->workspace->focus_stack)) : NULL);
524 /* If this workspace is currently visible, we don’t delete it */
525 if (workspace_is_visible(client->workspace))
526 workspace_empty = false;
528 if (workspace_empty) {
529 client->workspace->output = NULL;
530 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
533 /* Remove the urgency flag if set */
534 client->urgent = false;
535 workspace_update_urgent_flag(client->workspace);
544 * A destroy notify event is sent when the window is not unmapped, but
545 * immediately destroyed (for example when starting a window and immediately
546 * killing the program which started it).
548 * We just pass on the event to the unmap notify handler (by copying the
549 * important fields in the event data structure).
552 static int handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
553 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
555 xcb_unmap_notify_event_t unmap;
556 unmap.sequence = event->sequence;
557 unmap.event = event->event;
558 unmap.window = event->window;
560 return handle_unmap_notify_event(&unmap);
564 * Called when a window changes its title
567 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
568 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
570 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
573 window_update_name(con->window, prop, false);
575 x_push_changes(croot);
581 * Handles legacy window name updates (WM_NAME), see also src/window.c,
582 * window_update_name_legacy().
585 static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
586 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
588 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
591 window_update_name_legacy(con->window, prop, false);
593 x_push_changes(croot);
599 * Called when a window changes its WM_WINDOW_ROLE.
602 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
603 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
605 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
608 window_update_role(con->window, prop, false);
615 * Updates the client’s WM_CLASS property
618 static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
619 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
621 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
624 window_update_class(con->window, prop, false);
631 * Expose event means we should redraw our windows (= title bar)
634 static int handle_expose_event(xcb_expose_event_t *event) {
637 DLOG("window = %08x\n", event->window);
639 if ((parent = con_by_frame_id(event->window)) == NULL) {
640 LOG("expose event for unknown window, ignoring\n");
644 /* Since we render to our pixmap on every change anyways, expose events
645 * only tell us that the X server lost (parts of) the window contents. We
646 * can handle that by copying the appropriate part from our pixmap to the
648 xcb_copy_area(conn, parent->pixmap, parent->frame, parent->pm_gc,
649 event->x, event->y, event->x, event->y,
650 event->width, event->height);
657 * Handle client messages (EWMH)
660 static void handle_client_message(xcb_client_message_event_t *event) {
661 /* If this is a startup notification ClientMessage, the library will handle
662 * it and call our monitor_event() callback. */
663 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t*)event))
666 LOG("ClientMessage for window 0x%08x\n", event->window);
667 if (event->type == A__NET_WM_STATE) {
668 if (event->format != 32 || event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN) {
669 DLOG("atom in clientmessage is %d, fullscreen is %d\n",
670 event->data.data32[1], A__NET_WM_STATE_FULLSCREEN);
671 DLOG("not about fullscreen atom\n");
675 Con *con = con_by_window_id(event->window);
677 DLOG("Could not get window for client message\n");
681 /* Check if the fullscreen state should be toggled */
682 if ((con->fullscreen_mode != CF_NONE &&
683 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
684 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
685 (con->fullscreen_mode == CF_NONE &&
686 (event->data.data32[0] == _NET_WM_STATE_ADD ||
687 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
688 DLOG("toggling fullscreen\n");
689 con_toggle_fullscreen(con, CF_OUTPUT);
693 x_push_changes(croot);
694 } else if (event->type == A_I3_SYNC) {
695 DLOG("i3 sync, yay\n");
696 xcb_window_t window = event->data.data32[0];
697 uint32_t rnd = event->data.data32[1];
698 DLOG("Sending random value %d back to X11 window 0x%08x\n", rnd, window);
700 void *reply = scalloc(32);
701 xcb_client_message_event_t *ev = reply;
703 ev->response_type = XCB_CLIENT_MESSAGE;
705 ev->type = A_I3_SYNC;
707 ev->data.data32[0] = window;
708 ev->data.data32[1] = rnd;
710 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
714 DLOG("unhandled clientmessage\n");
720 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
721 xcb_atom_t atom, xcb_get_property_reply_t *property) {
722 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
723 before changing this property. */
724 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
730 * Handles the size hints set by a window, but currently only the part necessary for displaying
731 * clients proportionally inside their frames (mplayer for example)
733 * See ICCCM 4.1.2.3 for more details
736 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
737 xcb_atom_t name, xcb_get_property_reply_t *reply) {
738 Con *con = con_by_window_id(window);
740 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
744 xcb_size_hints_t size_hints;
746 //CLIENT_LOG(client);
748 /* If the hints were already in this event, use them, if not, request them */
750 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
752 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
754 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
755 // TODO: Minimum size is not yet implemented
756 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
759 bool changed = false;
760 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
761 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
762 if (con->width_increment != size_hints.width_inc) {
763 con->width_increment = size_hints.width_inc;
766 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
767 if (con->height_increment != size_hints.height_inc) {
768 con->height_increment = size_hints.height_inc;
773 DLOG("resize increments changed\n");
776 int base_width = 0, base_height = 0;
778 /* base_width/height are the desired size of the window.
779 We check if either the program-specified size or the program-specified
780 min-size is available */
781 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
782 base_width = size_hints.base_width;
783 base_height = size_hints.base_height;
784 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
785 /* TODO: is this right? icccm says not */
786 base_width = size_hints.min_width;
787 base_height = size_hints.min_height;
790 if (base_width != con->base_width ||
791 base_height != con->base_height) {
792 con->base_width = base_width;
793 con->base_height = base_height;
794 DLOG("client's base_height changed to %d\n", base_height);
795 DLOG("client's base_width changed to %d\n", base_width);
799 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
800 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
801 (size_hints.min_aspect_num <= 0) ||
802 (size_hints.min_aspect_den <= 0)) {
803 goto render_and_return;
806 /* XXX: do we really use rect here, not window_rect? */
807 double width = con->rect.width - base_width;
808 double height = con->rect.height - base_height;
809 /* Convert numerator/denominator to a double */
810 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
811 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
813 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
814 DLOG("width = %f, height = %f\n", width, height);
816 /* Sanity checks, this is user-input, in a way */
817 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
818 goto render_and_return;
820 /* Check if we need to set proportional_* variables using the correct ratio */
821 if ((width / height) < min_aspect) {
822 if (con->proportional_width != width ||
823 con->proportional_height != (width / min_aspect)) {
824 con->proportional_width = width;
825 con->proportional_height = width / min_aspect;
828 } else if ((width / height) > max_aspect) {
829 if (con->proportional_width != width ||
830 con->proportional_height != (width / max_aspect)) {
831 con->proportional_width = width;
832 con->proportional_height = width / max_aspect;
835 } else goto render_and_return;
845 * Handles the WM_HINTS property for extracting the urgency state of the window.
848 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
849 xcb_atom_t name, xcb_get_property_reply_t *reply) {
850 Con *con = con_by_window_id(window);
852 DLOG("Received WM_HINTS for unknown client\n");
856 xcb_icccm_wm_hints_t hints;
859 if (!xcb_icccm_get_wm_hints_from_reply(&hints, reply))
862 if (!xcb_icccm_get_wm_hints_reply(conn, xcb_icccm_get_wm_hints_unchecked(conn, con->window->id), &hints, NULL))
866 if (!con->urgent && focused == con) {
867 DLOG("Ignoring urgency flag for current client\n");
872 /* Update the flag on the client directly */
873 con->urgent = (xcb_icccm_wm_hints_get_urgency(&hints) != 0);
875 LOG("Urgency flag changed to %d\n", con->urgent);
878 /* Set the urgency flag on the workspace, if a workspace could be found
879 * (for dock clients, that is not the case). */
880 if ((ws = con_get_workspace(con)) != NULL)
881 workspace_update_urgent_flag(ws);
886 /* If the workspace this client is on is not visible, we need to redraw
887 * the workspace bar */
888 if (!workspace_is_visible(client->workspace)) {
889 Output *output = client->workspace->output;
890 render_workspace(conn, output, output->current_workspace);
900 * Handles the transient for hints set by a window, signalizing that this window is a popup window
901 * for some other window.
903 * See ICCCM 4.1.2.6 for more details
906 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
907 xcb_atom_t name, xcb_get_property_reply_t *prop) {
910 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
911 DLOG("No such window\n");
916 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
917 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32), NULL);
922 window_update_transient_for(con->window, prop);
924 // TODO: put window in floating mode if con->window->transient_for != XCB_NONE:
926 if (client->floating == FLOATING_AUTO_OFF) {
927 DLOG("This is a popup window, putting into floating\n");
928 toggle_floating_mode(conn, client, true);
936 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
937 * toolwindow (or similar) and to which window it belongs (logical parent).
940 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
941 xcb_atom_t name, xcb_get_property_reply_t *prop) {
943 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
947 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
948 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32), NULL);
953 window_update_leader(con->window, prop);
959 * Handles FocusIn events which are generated by clients (i3’s focus changes
960 * don’t generate FocusIn events due to a different EventMask) and updates the
961 * decorations accordingly.
964 static int handle_focus_in(xcb_focus_in_event_t *event) {
965 DLOG("focus change in, for window 0x%08x\n", event->event);
967 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
969 DLOG("That is con %p / %s\n", con, con->name);
971 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
972 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
973 DLOG("FocusIn event for grab/ungrab, ignoring\n");
977 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
978 DLOG("notify detail is pointer, ignoring this event\n");
982 if (focused_id == event->event) {
983 DLOG("focus matches the currently focused window, not doing anything\n");
987 /* Skip dock clients, they cannot get the i3 focus. */
988 if (con->parent->type == CT_DOCKAREA) {
989 DLOG("This is a dock client, not focusing.\n");
993 DLOG("focus is different, updating decorations\n");
995 /* Get the currently focused workspace to check if the focus change also
996 * involves changing workspaces. If so, we need to call workspace_show() to
997 * correctly update state and send the IPC event. */
998 Con *ws = con_get_workspace(con);
999 if (ws != con_get_workspace(focused))
1003 /* We update focused_id because we don’t need to set focus again */
1004 focused_id = event->event;
1005 x_push_changes(croot);
1009 /* Returns false if the event could not be processed (e.g. the window could not
1010 * be found), true otherwise */
1011 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);
1013 struct property_handler_t {
1016 cb_property_handler_t cb;
1019 static struct property_handler_t property_handlers[] = {
1020 { 0, 128, handle_windowname_change },
1021 { 0, UINT_MAX, handle_hints },
1022 { 0, 128, handle_windowname_change_legacy },
1023 { 0, UINT_MAX, handle_normal_hints },
1024 { 0, UINT_MAX, handle_clientleader_change },
1025 { 0, UINT_MAX, handle_transient_for },
1026 { 0, 128, handle_windowrole_change }
1028 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
1031 * Sets the appropriate atoms for the property handlers after the atoms were
1035 void property_handlers_init() {
1037 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
1039 property_handlers[0].atom = A__NET_WM_NAME;
1040 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1041 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1042 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1043 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1044 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1045 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1048 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1049 struct property_handler_t *handler = NULL;
1050 xcb_get_property_reply_t *propr = NULL;
1052 for (int c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1053 if (property_handlers[c].atom != atom)
1056 handler = &property_handlers[c];
1060 if (handler == NULL) {
1061 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1065 if (state != XCB_PROPERTY_DELETE) {
1066 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1067 propr = xcb_get_property_reply(conn, cookie, 0);
1070 /* the handler will free() the reply unless it returns false */
1071 if (!handler->cb(NULL, conn, state, window, atom, propr))
1076 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1080 void handle_event(int type, xcb_generic_event_t *event) {
1081 if (randr_base > -1 &&
1082 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1083 handle_screen_change(event);
1089 handle_key_press((xcb_key_press_event_t*)event);
1092 case XCB_BUTTON_PRESS:
1093 handle_button_press((xcb_button_press_event_t*)event);
1096 case XCB_MAP_REQUEST:
1097 handle_map_request((xcb_map_request_event_t*)event);
1100 case XCB_UNMAP_NOTIFY:
1101 handle_unmap_notify_event((xcb_unmap_notify_event_t*)event);
1104 case XCB_DESTROY_NOTIFY:
1105 handle_destroy_notify_event((xcb_destroy_notify_event_t*)event);
1109 handle_expose_event((xcb_expose_event_t*)event);
1112 case XCB_MOTION_NOTIFY:
1113 handle_motion_notify((xcb_motion_notify_event_t*)event);
1116 /* Enter window = user moved his mouse over the window */
1117 case XCB_ENTER_NOTIFY:
1118 handle_enter_notify((xcb_enter_notify_event_t*)event);
1121 /* Client message are sent to the root window. The only interesting
1122 * client message for us is _NET_WM_STATE, we honour
1123 * _NET_WM_STATE_FULLSCREEN */
1124 case XCB_CLIENT_MESSAGE:
1125 handle_client_message((xcb_client_message_event_t*)event);
1128 /* Configure request = window tried to change size on its own */
1129 case XCB_CONFIGURE_REQUEST:
1130 handle_configure_request((xcb_configure_request_event_t*)event);
1133 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1134 case XCB_MAPPING_NOTIFY:
1135 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
1139 handle_focus_in((xcb_focus_in_event_t*)event);
1142 case XCB_PROPERTY_NOTIFY: {
1143 xcb_property_notify_event_t *e = (xcb_property_notify_event_t*)event;
1144 last_timestamp = e->time;
1145 property_notify(e->state, e->window, e->atom);
1150 //DLOG("Unhandled event of type %d\n", type);