2 #define I3__FILE__ "handlers.c"
4 * vim:ts=4:sw=4:expandtab
6 * i3 - an improved dynamic tiling window manager
7 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
9 * handlers.c: Small handlers for various events (keypresses, focus changes,
17 #include <xcb/randr.h>
18 #include <X11/XKBlib.h>
19 #define SN_API_NOT_YET_FROZEN 1
20 #include <libsn/sn-monitor.h>
24 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
25 since it’d trigger an infinite loop of switching between the different windows when
26 changing workspaces */
27 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
30 * Adds the given sequence to the list of events which are ignored.
31 * If this ignore should only affect a specific response_type, pass
32 * response_type, otherwise, pass -1.
34 * Every ignored sequence number gets garbage collected after 5 seconds.
37 void add_ignore_event(const int sequence, const int response_type) {
38 struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
40 event->sequence = sequence;
41 event->response_type = response_type;
42 event->added = time(NULL);
44 SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
48 * Checks if the given sequence is ignored and returns true if so.
51 bool event_is_ignored(const int sequence, const int response_type) {
52 struct Ignore_Event *event;
53 time_t now = time(NULL);
54 for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
55 if ((now - event->added) > 5) {
56 struct Ignore_Event *save = event;
57 event = SLIST_NEXT(event, ignore_events);
58 SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
60 } else event = SLIST_NEXT(event, ignore_events);
63 SLIST_FOREACH(event, &ignore_events, ignore_events) {
64 if (event->sequence != sequence)
67 if (event->response_type != -1 &&
68 event->response_type != response_type)
71 /* instead of removing a sequence number we better wait until it gets
72 * garbage collected. it may generate multiple events (there are multiple
73 * enter_notifies for one configure_request, for example). */
74 //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
83 * Called with coordinates of an enter_notify event or motion_notify event
84 * to check if the user crossed virtual screen boundaries and adjust the
85 * current workspace, if so.
88 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
91 /* If the user disable focus follows mouse, we have nothing to do here */
92 if (config.disable_focus_follows_mouse)
95 if ((output = get_output_containing(x, y)) == NULL) {
96 ELOG("ERROR: No such screen\n");
100 if (output->con == NULL) {
101 ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
105 /* Focus the output on which the user moved his cursor */
106 Con *old_focused = focused;
107 Con *next = con_descend_focused(output_get_content(output->con));
108 /* Since we are switching outputs, this *must* be a different workspace, so
109 * call workspace_show() */
110 workspace_show(con_get_workspace(next));
113 /* If the focus changed, we re-render to get updated decorations */
114 if (old_focused != focused)
119 * When the user moves the mouse pointer onto a window, this callback gets called.
122 static void handle_enter_notify(xcb_enter_notify_event_t *event) {
125 last_timestamp = event->time;
127 DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
128 event->event, event->mode, event->detail, event->sequence);
129 DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
130 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
131 DLOG("This was not a normal notify, ignoring\n");
134 /* Some events are not interesting, because they were not generated
135 * actively by the user, but by reconfiguration of windows */
136 if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
137 DLOG("Event ignored\n");
141 bool enter_child = false;
142 /* Get container by frame or by child window */
143 if ((con = con_by_frame_id(event->event)) == NULL) {
144 con = con_by_window_id(event->event);
148 /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
150 DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
151 check_crossing_screen_boundary(event->root_x, event->root_y);
155 if (con->parent->type == CT_DOCKAREA) {
156 DLOG("Ignoring, this is a dock client\n");
160 /* see if the user entered the window on a certain window decoration */
161 int layout = (enter_child ? con->parent->layout : con->layout);
162 if (layout == L_DEFAULT) {
164 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
165 if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
166 LOG("using child %p / %s instead!\n", child, child->name);
173 if (client->workspace != c_ws && client->workspace->output == c_ws->output) {
174 /* This can happen when a client gets assigned to a different workspace than
175 * the current one (see src/mainx.c:reparent_window). Shortly after it was created,
176 * an enter_notify will follow. */
177 DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
182 if (config.disable_focus_follows_mouse)
185 /* Get the currently focused workspace to check if the focus change also
186 * involves changing workspaces. If so, we need to call workspace_show() to
187 * correctly update state and send the IPC event. */
188 Con *ws = con_get_workspace(con);
189 if (ws != con_get_workspace(focused))
192 focused_id = XCB_NONE;
193 con_focus(con_descend_focused(con));
200 * When the user moves the mouse but does not change the active window
201 * (e.g. when having no windows opened but moving mouse on the root screen
202 * and crossing virtual screen boundaries), this callback gets called.
205 static void handle_motion_notify(xcb_motion_notify_event_t *event) {
207 last_timestamp = event->time;
209 /* Skip events where the pointer was over a child window, we are only
210 * interested in events on the root window. */
211 if (event->child != 0)
215 if ((con = con_by_frame_id(event->event)) == NULL) {
216 DLOG("MotionNotify for an unknown container, checking if it crosses screen boundaries.\n");
217 check_crossing_screen_boundary(event->root_x, event->root_y);
221 if (config.disable_focus_follows_mouse)
224 if (con->layout != L_DEFAULT)
227 /* see over which rect the user is */
229 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
230 if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
233 /* We found the rect, let’s see if this window is focused */
234 if (TAILQ_FIRST(&(con->focus_head)) == current)
238 x_push_changes(croot);
246 * Called when the keyboard mapping changes (for example by using Xmodmap),
247 * we need to update our key bindings then (re-translate symbols).
250 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
251 if (event->request != XCB_MAPPING_KEYBOARD &&
252 event->request != XCB_MAPPING_MODIFIER)
255 DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
256 xcb_refresh_keyboard_mapping(keysyms, event);
258 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
260 ungrab_all_keys(conn);
262 grab_all_keys(conn, false);
268 * A new window appeared on the screen (=was mapped), so let’s manage it.
271 static void handle_map_request(xcb_map_request_event_t *event) {
272 xcb_get_window_attributes_cookie_t cookie;
274 cookie = xcb_get_window_attributes_unchecked(conn, event->window);
276 DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
277 add_ignore_event(event->sequence, -1);
279 manage_window(event->window, cookie, false);
280 x_push_changes(croot);
285 * Configure requests are received when the application wants to resize windows
288 * We generate a synthethic configure notify event to signalize the client its
292 static void handle_configure_request(xcb_configure_request_event_t *event) {
295 DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
296 event->window, event->x, event->y, event->width, event->height);
298 /* For unmanaged windows, we just execute the configure request. As soon as
299 * it gets mapped, we will take over anyways. */
300 if ((con = con_by_window_id(event->window)) == NULL) {
301 DLOG("Configure request for unmanaged window, can do that.\n");
306 #define COPY_MASK_MEMBER(mask_member, event_member) do { \
307 if (event->value_mask & mask_member) { \
308 mask |= mask_member; \
309 values[c++] = event->event_member; \
313 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
314 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
315 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
316 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
317 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
318 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
319 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
321 xcb_configure_window(conn, event->window, mask, values);
327 DLOG("Configure request!\n");
329 Con *workspace = con_get_workspace(con),
332 /* There might not be a corresponding workspace for dock cons, therefore we
333 * have to be careful here. */
335 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
337 fullscreen = con_get_fullscreen_con(workspace, CF_GLOBAL);
340 if (fullscreen != con && con_is_floating(con) && con_is_leaf(con)) {
341 /* find the height for the decorations */
342 int deco_height = config.font.height + 5;
343 /* we actually need to apply the size/position changes to the *parent*
345 Rect bsr = con_border_style_rect(con);
346 if (con->border_style == BS_NORMAL) {
347 bsr.y += deco_height;
348 bsr.height -= deco_height;
350 Con *floatingcon = con->parent;
352 if (strcmp(con_get_workspace(floatingcon)->name, "__i3_scratch") == 0) {
353 DLOG("This is a scratchpad container, ignoring ConfigureRequest\n");
357 Rect newrect = floatingcon->rect;
359 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
360 newrect.x = event->x + (-1) * bsr.x;
361 DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
363 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
364 newrect.y = event->y + (-1) * bsr.y;
365 DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
367 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
368 newrect.width = event->width + (-1) * bsr.width;
369 newrect.width += con->border_width * 2;
370 DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
371 event->width, newrect.width, con->border_width);
373 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
374 newrect.height = event->height + (-1) * bsr.height;
375 newrect.height += con->border_width * 2;
376 DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
377 event->height, newrect.height, con->border_width);
380 DLOG("Container is a floating leaf node, will do that.\n");
381 floating_reposition(floatingcon, newrect);
385 /* Dock windows can be reconfigured in their height */
386 if (con->parent && con->parent->type == CT_DOCKAREA) {
387 DLOG("Dock window, only height reconfiguration allowed\n");
388 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
389 DLOG("Height given, changing\n");
391 con->geometry.height = event->height;
396 fake_absolute_configure_notify(con);
403 * Configuration notifies are only handled because we need to set up ignore for
404 * the following enter notify events.
407 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
408 DLOG("configure_event, sequence %d\n", event->sequence);
409 /* We ignore this sequence twice because events for child and frame should be ignored */
410 add_ignore_event(event->sequence);
411 add_ignore_event(event->sequence);
418 * Gets triggered upon a RandR screen change event, that is when the user
419 * changes the screen configuration in any way (mode, position, …)
422 static void handle_screen_change(xcb_generic_event_t *e) {
423 DLOG("RandR screen change\n");
425 randr_query_outputs();
427 scratchpad_fix_resolution();
429 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
435 * Our window decorations were unmapped. That means, the window will be killed
436 * now, so we better clean up before.
439 static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
440 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
441 xcb_get_input_focus_cookie_t cookie;
442 Con *con = con_by_window_id(event->window);
444 /* This could also be an UnmapNotify for the frame. We need to
445 * decrement the ignore_unmap counter. */
446 con = con_by_frame_id(event->window);
448 LOG("Not a managed window, ignoring UnmapNotify event\n");
452 if (con->ignore_unmap > 0)
454 /* See the end of this function. */
455 cookie = xcb_get_input_focus(conn);
456 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
460 /* See the end of this function. */
461 cookie = xcb_get_input_focus(conn);
463 if (con->ignore_unmap > 0) {
464 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
469 tree_close(con, DONT_KILL_WINDOW, false, false);
471 x_push_changes(croot);
474 /* If the client (as opposed to i3) destroyed or unmapped a window, an
475 * EnterNotify event will follow (indistinguishable from an EnterNotify
476 * event caused by moving your mouse), causing i3 to set focus to whichever
477 * window is now visible.
479 * In a complex stacked or tabbed layout (take two v-split containers in a
480 * tabbed container), when the bottom window in tab2 is closed, the bottom
481 * window of tab1 is visible instead. X11 will thus send an EnterNotify
482 * event for the bottom window of tab1, while the focus should be set to
483 * the remaining window of tab2.
485 * Therefore, we ignore all EnterNotify events which have the same sequence
486 * as an UnmapNotify event. */
487 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
489 /* Since we just ignored the sequence of this UnmapNotify, we want to make
490 * sure that following events use a different sequence. When putting xterm
491 * into fullscreen and moving the pointer to a different window, without
492 * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
493 * with the same sequence and thus were ignored (see ticket #609). */
494 free(xcb_get_input_focus_reply(conn, cookie, NULL));
498 * A destroy notify event is sent when the window is not unmapped, but
499 * immediately destroyed (for example when starting a window and immediately
500 * killing the program which started it).
502 * We just pass on the event to the unmap notify handler (by copying the
503 * important fields in the event data structure).
506 static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
507 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
509 xcb_unmap_notify_event_t unmap;
510 unmap.sequence = event->sequence;
511 unmap.event = event->event;
512 unmap.window = event->window;
514 handle_unmap_notify_event(&unmap);
518 * Called when a window changes its title
521 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
522 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
524 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
527 window_update_name(con->window, prop, false);
529 x_push_changes(croot);
535 * Handles legacy window name updates (WM_NAME), see also src/window.c,
536 * window_update_name_legacy().
539 static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
540 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
542 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
545 window_update_name_legacy(con->window, prop, false);
547 x_push_changes(croot);
553 * Called when a window changes its WM_WINDOW_ROLE.
556 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
557 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
559 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
562 window_update_role(con->window, prop, false);
569 * Updates the client’s WM_CLASS property
572 static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
573 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
575 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
578 window_update_class(con->window, prop, false);
585 * Expose event means we should redraw our windows (= title bar)
588 static void handle_expose_event(xcb_expose_event_t *event) {
591 DLOG("window = %08x\n", event->window);
593 if ((parent = con_by_frame_id(event->window)) == NULL) {
594 LOG("expose event for unknown window, ignoring\n");
598 /* Since we render to our pixmap on every change anyways, expose events
599 * only tell us that the X server lost (parts of) the window contents. We
600 * can handle that by copying the appropriate part from our pixmap to the
602 xcb_copy_area(conn, parent->pixmap, parent->frame, parent->pm_gc,
603 event->x, event->y, event->x, event->y,
604 event->width, event->height);
611 * Handle client messages (EWMH)
614 static void handle_client_message(xcb_client_message_event_t *event) {
615 /* If this is a startup notification ClientMessage, the library will handle
616 * it and call our monitor_event() callback. */
617 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t*)event))
620 LOG("ClientMessage for window 0x%08x\n", event->window);
621 if (event->type == A__NET_WM_STATE) {
622 if (event->format != 32 || event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN) {
623 DLOG("atom in clientmessage is %d, fullscreen is %d\n",
624 event->data.data32[1], A__NET_WM_STATE_FULLSCREEN);
625 DLOG("not about fullscreen atom\n");
629 Con *con = con_by_window_id(event->window);
631 DLOG("Could not get window for client message\n");
635 /* Check if the fullscreen state should be toggled */
636 if ((con->fullscreen_mode != CF_NONE &&
637 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
638 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
639 (con->fullscreen_mode == CF_NONE &&
640 (event->data.data32[0] == _NET_WM_STATE_ADD ||
641 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
642 DLOG("toggling fullscreen\n");
643 con_toggle_fullscreen(con, CF_OUTPUT);
647 } else if (event->type == A__NET_ACTIVE_WINDOW) {
648 DLOG("_NET_ACTIVE_WINDOW: Window 0x%08x should be activated\n", event->window);
649 Con *con = con_by_window_id(event->window);
651 DLOG("Could not get window for client message\n");
655 Con *ws = con_get_workspace(con);
656 if (!workspace_is_visible(ws)) {
657 DLOG("Workspace not visible, ignoring _NET_ACTIVE_WINDOW\n");
661 if (ws != con_get_workspace(focused))
666 } else if (event->type == A_I3_SYNC) {
667 xcb_window_t window = event->data.data32[0];
668 uint32_t rnd = event->data.data32[1];
669 DLOG("[i3 sync protocol] Sending random value %d back to X11 window 0x%08x\n", rnd, window);
671 void *reply = scalloc(32);
672 xcb_client_message_event_t *ev = reply;
674 ev->response_type = XCB_CLIENT_MESSAGE;
676 ev->type = A_I3_SYNC;
678 ev->data.data32[0] = window;
679 ev->data.data32[1] = rnd;
681 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
685 DLOG("unhandled clientmessage\n");
691 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
692 xcb_atom_t atom, xcb_get_property_reply_t *property) {
693 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
694 before changing this property. */
695 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
701 * Handles the size hints set by a window, but currently only the part necessary for displaying
702 * clients proportionally inside their frames (mplayer for example)
704 * See ICCCM 4.1.2.3 for more details
707 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
708 xcb_atom_t name, xcb_get_property_reply_t *reply) {
709 Con *con = con_by_window_id(window);
711 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
715 xcb_size_hints_t size_hints;
717 //CLIENT_LOG(client);
719 /* If the hints were already in this event, use them, if not, request them */
721 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
723 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
725 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
726 // TODO: Minimum size is not yet implemented
727 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
730 bool changed = false;
731 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
732 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
733 if (con->width_increment != size_hints.width_inc) {
734 con->width_increment = size_hints.width_inc;
737 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
738 if (con->height_increment != size_hints.height_inc) {
739 con->height_increment = size_hints.height_inc;
744 DLOG("resize increments changed\n");
747 int base_width = 0, base_height = 0;
749 /* base_width/height are the desired size of the window.
750 We check if either the program-specified size or the program-specified
751 min-size is available */
752 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
753 base_width = size_hints.base_width;
754 base_height = size_hints.base_height;
755 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
756 /* TODO: is this right? icccm says not */
757 base_width = size_hints.min_width;
758 base_height = size_hints.min_height;
761 if (base_width != con->base_width ||
762 base_height != con->base_height) {
763 con->base_width = base_width;
764 con->base_height = base_height;
765 DLOG("client's base_height changed to %d\n", base_height);
766 DLOG("client's base_width changed to %d\n", base_width);
770 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
771 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
772 (size_hints.min_aspect_num <= 0) ||
773 (size_hints.min_aspect_den <= 0)) {
774 goto render_and_return;
777 /* XXX: do we really use rect here, not window_rect? */
778 double width = con->rect.width - base_width;
779 double height = con->rect.height - base_height;
780 /* Convert numerator/denominator to a double */
781 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
782 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
784 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
785 DLOG("width = %f, height = %f\n", width, height);
787 /* Sanity checks, this is user-input, in a way */
788 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
789 goto render_and_return;
791 /* Check if we need to set proportional_* variables using the correct ratio */
792 if ((width / height) < min_aspect) {
793 if (con->proportional_width != width ||
794 con->proportional_height != (width / min_aspect)) {
795 con->proportional_width = width;
796 con->proportional_height = width / min_aspect;
799 } else if ((width / height) > max_aspect) {
800 if (con->proportional_width != width ||
801 con->proportional_height != (width / max_aspect)) {
802 con->proportional_width = width;
803 con->proportional_height = width / max_aspect;
806 } else goto render_and_return;
816 * Handles the WM_HINTS property for extracting the urgency state of the window.
819 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
820 xcb_atom_t name, xcb_get_property_reply_t *reply) {
821 Con *con = con_by_window_id(window);
823 DLOG("Received WM_HINTS for unknown client\n");
827 xcb_icccm_wm_hints_t hints;
830 if (!(reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL)))
833 if (!xcb_icccm_get_wm_hints_from_reply(&hints, reply))
836 if (!con->urgent && focused == con) {
837 DLOG("Ignoring urgency flag for current client\n");
838 con->window->urgent.tv_sec = 0;
839 con->window->urgent.tv_usec = 0;
843 /* Update the flag on the client directly */
844 bool hint_urgent = (xcb_icccm_wm_hints_get_urgency(&hints) != 0);
846 if (con->urgency_timer == NULL) {
847 con->urgent = hint_urgent;
849 DLOG("Discarding urgency WM_HINT because timer is running\n");
854 gettimeofday(&con->window->urgent, NULL);
856 con->window->urgent.tv_sec = 0;
857 con->window->urgent.tv_usec = 0;
861 con_update_parents_urgency(con);
863 LOG("Urgency flag changed to %d\n", con->urgent);
866 /* Set the urgency flag on the workspace, if a workspace could be found
867 * (for dock clients, that is not the case). */
868 if ((ws = con_get_workspace(con)) != NULL)
869 workspace_update_urgent_flag(ws);
875 window_update_hints(con->window, reply);
881 * Handles the transient for hints set by a window, signalizing that this window is a popup window
882 * for some other window.
884 * See ICCCM 4.1.2.6 for more details
887 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
888 xcb_atom_t name, xcb_get_property_reply_t *prop) {
891 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
892 DLOG("No such window\n");
897 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
898 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32), NULL);
903 window_update_transient_for(con->window, prop);
909 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
910 * toolwindow (or similar) and to which window it belongs (logical parent).
913 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
914 xcb_atom_t name, xcb_get_property_reply_t *prop) {
916 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
920 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
921 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32), NULL);
926 window_update_leader(con->window, prop);
932 * Handles FocusIn events which are generated by clients (i3’s focus changes
933 * don’t generate FocusIn events due to a different EventMask) and updates the
934 * decorations accordingly.
937 static void handle_focus_in(xcb_focus_in_event_t *event) {
938 DLOG("focus change in, for window 0x%08x\n", event->event);
940 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
942 DLOG("That is con %p / %s\n", con, con->name);
944 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
945 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
946 DLOG("FocusIn event for grab/ungrab, ignoring\n");
950 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
951 DLOG("notify detail is pointer, ignoring this event\n");
955 if (focused_id == event->event) {
956 DLOG("focus matches the currently focused window, not doing anything\n");
960 /* Skip dock clients, they cannot get the i3 focus. */
961 if (con->parent->type == CT_DOCKAREA) {
962 DLOG("This is a dock client, not focusing.\n");
966 DLOG("focus is different, updating decorations\n");
968 /* Get the currently focused workspace to check if the focus change also
969 * involves changing workspaces. If so, we need to call workspace_show() to
970 * correctly update state and send the IPC event. */
971 Con *ws = con_get_workspace(con);
972 if (ws != con_get_workspace(focused))
976 /* We update focused_id because we don’t need to set focus again */
977 focused_id = event->event;
978 x_push_changes(croot);
982 /* Returns false if the event could not be processed (e.g. the window could not
983 * be found), true otherwise */
984 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);
986 struct property_handler_t {
989 cb_property_handler_t cb;
992 static struct property_handler_t property_handlers[] = {
993 { 0, 128, handle_windowname_change },
994 { 0, UINT_MAX, handle_hints },
995 { 0, 128, handle_windowname_change_legacy },
996 { 0, UINT_MAX, handle_normal_hints },
997 { 0, UINT_MAX, handle_clientleader_change },
998 { 0, UINT_MAX, handle_transient_for },
999 { 0, 128, handle_windowrole_change }
1001 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
1004 * Sets the appropriate atoms for the property handlers after the atoms were
1008 void property_handlers_init(void) {
1010 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
1012 property_handlers[0].atom = A__NET_WM_NAME;
1013 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1014 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1015 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1016 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1017 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1018 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1021 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1022 struct property_handler_t *handler = NULL;
1023 xcb_get_property_reply_t *propr = NULL;
1025 for (int c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1026 if (property_handlers[c].atom != atom)
1029 handler = &property_handlers[c];
1033 if (handler == NULL) {
1034 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1038 if (state != XCB_PROPERTY_DELETE) {
1039 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1040 propr = xcb_get_property_reply(conn, cookie, 0);
1043 /* the handler will free() the reply unless it returns false */
1044 if (!handler->cb(NULL, conn, state, window, atom, propr))
1049 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1053 void handle_event(int type, xcb_generic_event_t *event) {
1054 if (randr_base > -1 &&
1055 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1056 handle_screen_change(event);
1062 case XCB_KEY_RELEASE:
1063 handle_key_press((xcb_key_press_event_t*)event);
1066 case XCB_BUTTON_PRESS:
1067 handle_button_press((xcb_button_press_event_t*)event);
1070 case XCB_MAP_REQUEST:
1071 handle_map_request((xcb_map_request_event_t*)event);
1074 case XCB_UNMAP_NOTIFY:
1075 handle_unmap_notify_event((xcb_unmap_notify_event_t*)event);
1078 case XCB_DESTROY_NOTIFY:
1079 handle_destroy_notify_event((xcb_destroy_notify_event_t*)event);
1083 handle_expose_event((xcb_expose_event_t*)event);
1086 case XCB_MOTION_NOTIFY:
1087 handle_motion_notify((xcb_motion_notify_event_t*)event);
1090 /* Enter window = user moved his mouse over the window */
1091 case XCB_ENTER_NOTIFY:
1092 handle_enter_notify((xcb_enter_notify_event_t*)event);
1095 /* Client message are sent to the root window. The only interesting
1096 * client message for us is _NET_WM_STATE, we honour
1097 * _NET_WM_STATE_FULLSCREEN */
1098 case XCB_CLIENT_MESSAGE:
1099 handle_client_message((xcb_client_message_event_t*)event);
1102 /* Configure request = window tried to change size on its own */
1103 case XCB_CONFIGURE_REQUEST:
1104 handle_configure_request((xcb_configure_request_event_t*)event);
1107 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1108 case XCB_MAPPING_NOTIFY:
1109 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
1113 handle_focus_in((xcb_focus_in_event_t*)event);
1116 case XCB_PROPERTY_NOTIFY: {
1117 xcb_property_notify_event_t *e = (xcb_property_notify_event_t*)event;
1118 last_timestamp = e->time;
1119 property_notify(e->state, e->window, e->atom);
1124 //DLOG("Unhandled event of type %d\n", type);