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;
379 DLOG("Container is a floating leaf node, will do that.\n");
380 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
381 floatingcon->rect.x = event->x + (-1) * bsr.x;
382 DLOG("proposed x = %d, new x is %d\n", event->x, floatingcon->rect.x);
384 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
385 floatingcon->rect.y = event->y + (-1) * bsr.y;
386 DLOG("proposed y = %d, new y is %d\n", event->y, floatingcon->rect.y);
388 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
389 floatingcon->rect.width = event->width + (-1) * bsr.width;
390 floatingcon->rect.width += con->border_width * 2;
391 DLOG("proposed width = %d, new width is %d (x11 border %d)\n", event->width, floatingcon->rect.width, con->border_width);
393 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
394 floatingcon->rect.height = event->height + (-1) * bsr.height;
395 floatingcon->rect.height += con->border_width * 2;
396 DLOG("proposed height = %d, new height is %d (x11 border %d)\n", event->height, floatingcon->rect.height, con->border_width);
398 floating_maybe_reassign_ws(floatingcon);
402 /* Dock windows can be reconfigured in their height */
403 if (con->parent && con->parent->type == CT_DOCKAREA) {
404 DLOG("Dock window, only height reconfiguration allowed\n");
405 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
406 DLOG("Height given, changing\n");
408 con->geometry.height = event->height;
413 fake_absolute_configure_notify(con);
420 * Configuration notifies are only handled because we need to set up ignore for
421 * the following enter notify events.
424 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
425 DLOG("configure_event, sequence %d\n", event->sequence);
426 /* We ignore this sequence twice because events for child and frame should be ignored */
427 add_ignore_event(event->sequence);
428 add_ignore_event(event->sequence);
435 * Gets triggered upon a RandR screen change event, that is when the user
436 * changes the screen configuration in any way (mode, position, …)
439 static int handle_screen_change(xcb_generic_event_t *e) {
440 DLOG("RandR screen change\n");
442 randr_query_outputs();
444 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
450 * Our window decorations were unmapped. That means, the window will be killed
451 * now, so we better clean up before.
454 static int handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
455 /* If the client (as opposed to i3) destroyed or unmapped a window, an
456 * EnterNotify event will follow (indistinguishable from an EnterNotify
457 * event caused by moving your mouse), causing i3 to set focus to whichever
458 * window is now visible.
460 * In a complex stacked or tabbed layout (take two v-split containers in a
461 * tabbed container), when the bottom window in tab2 is closed, the bottom
462 * window of tab1 is visible instead. X11 will thus send an EnterNotify
463 * event for the bottom window of tab1, while the focus should be set to
464 * the remaining window of tab2.
466 * Therefore, we ignore all EnterNotify events which have the same sequence
467 * as an UnmapNotify event. */
468 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
470 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
471 Con *con = con_by_window_id(event->window);
473 /* This could also be an UnmapNotify for the frame. We need to
474 * decrement the ignore_unmap counter. */
475 con = con_by_frame_id(event->window);
477 LOG("Not a managed window, ignoring UnmapNotify event\n");
480 if (con->ignore_unmap > 0)
482 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
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);
498 if (client == NULL) {
499 DLOG("not a managed window. Ignoring.\n");
501 /* This was most likely the destroyed frame of a client which is
502 * currently being unmapped, so we add this sequence (again!) to
503 * the ignore list (enter_notify events will get sent for both,
504 * the child and its frame). */
505 add_ignore_event(event->sequence);
513 /* Let’s see how many clients there are left on the workspace to delete it if it’s empty */
514 bool workspace_empty = SLIST_EMPTY(&(client->workspace->focus_stack));
515 bool workspace_focused = (c_ws == client->workspace);
516 Client *to_focus = (!workspace_empty ? SLIST_FIRST(&(client->workspace->focus_stack)) : NULL);
518 /* If this workspace is currently visible, we don’t delete it */
519 if (workspace_is_visible(client->workspace))
520 workspace_empty = false;
522 if (workspace_empty) {
523 client->workspace->output = NULL;
524 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
527 /* Remove the urgency flag if set */
528 client->urgent = false;
529 workspace_update_urgent_flag(client->workspace);
538 * A destroy notify event is sent when the window is not unmapped, but
539 * immediately destroyed (for example when starting a window and immediately
540 * killing the program which started it).
542 * We just pass on the event to the unmap notify handler (by copying the
543 * important fields in the event data structure).
546 static int handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
547 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
549 xcb_unmap_notify_event_t unmap;
550 unmap.sequence = event->sequence;
551 unmap.event = event->event;
552 unmap.window = event->window;
554 return handle_unmap_notify_event(&unmap);
558 * Called when a window changes its title
561 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
562 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
564 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
567 window_update_name(con->window, prop, false);
569 x_push_changes(croot);
575 * Handles legacy window name updates (WM_NAME), see also src/window.c,
576 * window_update_name_legacy().
579 static bool handle_windowname_change_legacy(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_name_legacy(con->window, prop, false);
587 x_push_changes(croot);
593 * Called when a window changes its WM_WINDOW_ROLE.
596 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
597 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
599 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
602 window_update_role(con->window, prop, false);
609 * Updates the client’s WM_CLASS property
612 static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
613 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
615 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
618 window_update_class(con->window, prop, false);
625 * Expose event means we should redraw our windows (= title bar)
628 static int handle_expose_event(xcb_expose_event_t *event) {
631 /* event->count is the number of minimum remaining expose events for this
632 * window, so we skip all events but the last one */
633 if (event->count != 0)
636 DLOG("window = %08x\n", event->window);
638 if ((parent = con_by_frame_id(event->window)) == NULL) {
639 LOG("expose event for unknown window, ignoring\n");
643 /* re-render the parent (recursively, if it’s a split con) */
644 x_deco_recurse(parent);
651 * Handle client messages (EWMH)
654 static void handle_client_message(xcb_client_message_event_t *event) {
655 /* If this is a startup notification ClientMessage, the library will handle
656 * it and call our monitor_event() callback. */
657 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t*)event))
660 LOG("ClientMessage for window 0x%08x\n", event->window);
661 if (event->type == A__NET_WM_STATE) {
662 if (event->format != 32 || event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN) {
663 DLOG("atom in clientmessage is %d, fullscreen is %d\n",
664 event->data.data32[1], A__NET_WM_STATE_FULLSCREEN);
665 DLOG("not about fullscreen atom\n");
669 Con *con = con_by_window_id(event->window);
671 DLOG("Could not get window for client message\n");
675 /* Check if the fullscreen state should be toggled */
676 if ((con->fullscreen_mode != CF_NONE &&
677 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
678 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
679 (con->fullscreen_mode == CF_NONE &&
680 (event->data.data32[0] == _NET_WM_STATE_ADD ||
681 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
682 DLOG("toggling fullscreen\n");
683 con_toggle_fullscreen(con, CF_OUTPUT);
687 x_push_changes(croot);
688 } else if (event->type == A_I3_SYNC) {
689 DLOG("i3 sync, yay\n");
690 xcb_window_t window = event->data.data32[0];
691 uint32_t rnd = event->data.data32[1];
692 DLOG("Sending random value %d back to X11 window 0x%08x\n", rnd, window);
694 void *reply = scalloc(32);
695 xcb_client_message_event_t *ev = reply;
697 ev->response_type = XCB_CLIENT_MESSAGE;
699 ev->type = A_I3_SYNC;
701 ev->data.data32[0] = window;
702 ev->data.data32[1] = rnd;
704 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
708 DLOG("unhandled clientmessage\n");
714 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
715 xcb_atom_t atom, xcb_get_property_reply_t *property) {
716 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
717 before changing this property. */
718 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
724 * Handles the size hints set by a window, but currently only the part necessary for displaying
725 * clients proportionally inside their frames (mplayer for example)
727 * See ICCCM 4.1.2.3 for more details
730 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
731 xcb_atom_t name, xcb_get_property_reply_t *reply) {
732 Con *con = con_by_window_id(window);
734 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
738 xcb_size_hints_t size_hints;
740 //CLIENT_LOG(client);
742 /* If the hints were already in this event, use them, if not, request them */
744 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
746 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
748 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
749 // TODO: Minimum size is not yet implemented
750 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
753 bool changed = false;
754 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
755 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
756 if (con->width_increment != size_hints.width_inc) {
757 con->width_increment = size_hints.width_inc;
760 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
761 if (con->height_increment != size_hints.height_inc) {
762 con->height_increment = size_hints.height_inc;
767 DLOG("resize increments changed\n");
770 int base_width = 0, base_height = 0;
772 /* base_width/height are the desired size of the window.
773 We check if either the program-specified size or the program-specified
774 min-size is available */
775 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
776 base_width = size_hints.base_width;
777 base_height = size_hints.base_height;
778 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
779 /* TODO: is this right? icccm says not */
780 base_width = size_hints.min_width;
781 base_height = size_hints.min_height;
784 if (base_width != con->base_width ||
785 base_height != con->base_height) {
786 con->base_width = base_width;
787 con->base_height = base_height;
788 DLOG("client's base_height changed to %d\n", base_height);
789 DLOG("client's base_width changed to %d\n", base_width);
793 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
794 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
795 (size_hints.min_aspect_num <= 0) ||
796 (size_hints.min_aspect_den <= 0)) {
797 goto render_and_return;
800 /* XXX: do we really use rect here, not window_rect? */
801 double width = con->rect.width - base_width;
802 double height = con->rect.height - base_height;
803 /* Convert numerator/denominator to a double */
804 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
805 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
807 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
808 DLOG("width = %f, height = %f\n", width, height);
810 /* Sanity checks, this is user-input, in a way */
811 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
812 goto render_and_return;
814 /* Check if we need to set proportional_* variables using the correct ratio */
815 if ((width / height) < min_aspect) {
816 if (con->proportional_width != width ||
817 con->proportional_height != (width / min_aspect)) {
818 con->proportional_width = width;
819 con->proportional_height = width / min_aspect;
822 } else if ((width / height) > max_aspect) {
823 if (con->proportional_width != width ||
824 con->proportional_height != (width / max_aspect)) {
825 con->proportional_width = width;
826 con->proportional_height = width / max_aspect;
829 } else goto render_and_return;
839 * Handles the WM_HINTS property for extracting the urgency state of the window.
842 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
843 xcb_atom_t name, xcb_get_property_reply_t *reply) {
844 Con *con = con_by_window_id(window);
846 DLOG("Received WM_HINTS for unknown client\n");
850 xcb_icccm_wm_hints_t hints;
853 if (!xcb_icccm_get_wm_hints_from_reply(&hints, reply))
856 if (!xcb_icccm_get_wm_hints_reply(conn, xcb_icccm_get_wm_hints_unchecked(conn, con->window->id), &hints, NULL))
860 if (!con->urgent && focused == con) {
861 DLOG("Ignoring urgency flag for current client\n");
866 /* Update the flag on the client directly */
867 con->urgent = (xcb_icccm_wm_hints_get_urgency(&hints) != 0);
869 LOG("Urgency flag changed to %d\n", con->urgent);
872 /* Set the urgency flag on the workspace, if a workspace could be found
873 * (for dock clients, that is not the case). */
874 if ((ws = con_get_workspace(con)) != NULL)
875 workspace_update_urgent_flag(ws);
880 /* If the workspace this client is on is not visible, we need to redraw
881 * the workspace bar */
882 if (!workspace_is_visible(client->workspace)) {
883 Output *output = client->workspace->output;
884 render_workspace(conn, output, output->current_workspace);
894 * Handles the transient for hints set by a window, signalizing that this window is a popup window
895 * for some other window.
897 * See ICCCM 4.1.2.6 for more details
900 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
901 xcb_atom_t name, xcb_get_property_reply_t *prop) {
904 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
905 DLOG("No such window\n");
910 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
911 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32), NULL);
916 window_update_transient_for(con->window, prop);
918 // TODO: put window in floating mode if con->window->transient_for != XCB_NONE:
920 if (client->floating == FLOATING_AUTO_OFF) {
921 DLOG("This is a popup window, putting into floating\n");
922 toggle_floating_mode(conn, client, true);
930 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
931 * toolwindow (or similar) and to which window it belongs (logical parent).
934 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
935 xcb_atom_t name, xcb_get_property_reply_t *prop) {
937 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
941 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
942 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32), NULL);
947 window_update_leader(con->window, prop);
953 * Handles FocusIn events which are generated by clients (i3’s focus changes
954 * don’t generate FocusIn events due to a different EventMask) and updates the
955 * decorations accordingly.
958 static int handle_focus_in(xcb_focus_in_event_t *event) {
959 DLOG("focus change in, for window 0x%08x\n", event->event);
961 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
963 DLOG("That is con %p / %s\n", con, con->name);
965 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
966 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
967 DLOG("FocusIn event for grab/ungrab, ignoring\n");
971 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
972 DLOG("notify detail is pointer, ignoring this event\n");
976 if (focused_id == event->event) {
977 DLOG("focus matches the currently focused window, not doing anything\n");
981 /* Skip dock clients, they cannot get the i3 focus. */
982 if (con->parent->type == CT_DOCKAREA) {
983 DLOG("This is a dock client, not focusing.\n");
987 DLOG("focus is different, updating decorations\n");
989 /* Get the currently focused workspace to check if the focus change also
990 * involves changing workspaces. If so, we need to call workspace_show() to
991 * correctly update state and send the IPC event. */
992 Con *ws = con_get_workspace(con);
993 if (ws != con_get_workspace(focused))
997 /* We update focused_id because we don’t need to set focus again */
998 focused_id = event->event;
999 x_push_changes(croot);
1003 /* Returns false if the event could not be processed (e.g. the window could not
1004 * be found), true otherwise */
1005 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);
1007 struct property_handler_t {
1010 cb_property_handler_t cb;
1013 static struct property_handler_t property_handlers[] = {
1014 { 0, 128, handle_windowname_change },
1015 { 0, UINT_MAX, handle_hints },
1016 { 0, 128, handle_windowname_change_legacy },
1017 { 0, UINT_MAX, handle_normal_hints },
1018 { 0, UINT_MAX, handle_clientleader_change },
1019 { 0, UINT_MAX, handle_transient_for },
1020 { 0, 128, handle_windowrole_change }
1022 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
1025 * Sets the appropriate atoms for the property handlers after the atoms were
1029 void property_handlers_init() {
1031 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
1033 property_handlers[0].atom = A__NET_WM_NAME;
1034 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1035 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1036 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1037 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1038 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1039 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1042 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1043 struct property_handler_t *handler = NULL;
1044 xcb_get_property_reply_t *propr = NULL;
1046 for (int c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1047 if (property_handlers[c].atom != atom)
1050 handler = &property_handlers[c];
1054 if (handler == NULL) {
1055 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1059 if (state != XCB_PROPERTY_DELETE) {
1060 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1061 propr = xcb_get_property_reply(conn, cookie, 0);
1064 /* the handler will free() the reply unless it returns false */
1065 if (!handler->cb(NULL, conn, state, window, atom, propr))
1070 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1074 void handle_event(int type, xcb_generic_event_t *event) {
1075 if (randr_base > -1 &&
1076 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1077 handle_screen_change(event);
1083 handle_key_press((xcb_key_press_event_t*)event);
1086 case XCB_BUTTON_PRESS:
1087 handle_button_press((xcb_button_press_event_t*)event);
1090 case XCB_MAP_REQUEST:
1091 handle_map_request((xcb_map_request_event_t*)event);
1094 case XCB_UNMAP_NOTIFY:
1095 handle_unmap_notify_event((xcb_unmap_notify_event_t*)event);
1098 case XCB_DESTROY_NOTIFY:
1099 handle_destroy_notify_event((xcb_destroy_notify_event_t*)event);
1103 handle_expose_event((xcb_expose_event_t*)event);
1106 case XCB_MOTION_NOTIFY:
1107 handle_motion_notify((xcb_motion_notify_event_t*)event);
1110 /* Enter window = user moved his mouse over the window */
1111 case XCB_ENTER_NOTIFY:
1112 handle_enter_notify((xcb_enter_notify_event_t*)event);
1115 /* Client message are sent to the root window. The only interesting
1116 * client message for us is _NET_WM_STATE, we honour
1117 * _NET_WM_STATE_FULLSCREEN */
1118 case XCB_CLIENT_MESSAGE:
1119 handle_client_message((xcb_client_message_event_t*)event);
1122 /* Configure request = window tried to change size on its own */
1123 case XCB_CONFIGURE_REQUEST:
1124 handle_configure_request((xcb_configure_request_event_t*)event);
1127 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1128 case XCB_MAPPING_NOTIFY:
1129 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
1133 handle_focus_in((xcb_focus_in_event_t*)event);
1136 case XCB_PROPERTY_NOTIFY: {
1137 xcb_property_notify_event_t *e = (xcb_property_notify_event_t*)event;
1138 last_timestamp = e->time;
1139 property_notify(e->state, e->window, e->atom);
1144 //DLOG("Unhandled event of type %d\n", type);