2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
7 * handlers.c: Small handlers for various events (keypresses, focus changes,
15 #include <xcb/randr.h>
16 #include <X11/XKBlib.h>
17 #define SN_API_NOT_YET_FROZEN 1
18 #include <libsn/sn-monitor.h>
22 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
23 since it’d trigger an infinite loop of switching between the different windows when
24 changing workspaces */
25 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
28 * Adds the given sequence to the list of events which are ignored.
29 * If this ignore should only affect a specific response_type, pass
30 * response_type, otherwise, pass -1.
32 * Every ignored sequence number gets garbage collected after 5 seconds.
35 void add_ignore_event(const int sequence, const int response_type) {
36 struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
38 event->sequence = sequence;
39 event->response_type = response_type;
40 event->added = time(NULL);
42 SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
46 * Checks if the given sequence is ignored and returns true if so.
49 bool event_is_ignored(const int sequence, const int response_type) {
50 struct Ignore_Event *event;
51 time_t now = time(NULL);
52 for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
53 if ((now - event->added) > 5) {
54 struct Ignore_Event *save = event;
55 event = SLIST_NEXT(event, ignore_events);
56 SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
58 } else event = SLIST_NEXT(event, ignore_events);
61 SLIST_FOREACH(event, &ignore_events, ignore_events) {
62 if (event->sequence != sequence)
65 if (event->response_type != -1 &&
66 event->response_type != response_type)
69 /* instead of removing a sequence number we better wait until it gets
70 * garbage collected. it may generate multiple events (there are multiple
71 * enter_notifies for one configure_request, for example). */
72 //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
82 * There was a key press. We compare this key code with our bindings table and pass
83 * the bound action to parse_command().
86 static void handle_key_press(xcb_key_press_event_t *event) {
88 last_timestamp = event->time;
90 DLOG("Keypress %d, state raw = %d\n", event->detail, event->state);
92 /* Remove the numlock bit, all other bits are modifiers we can bind to */
93 uint16_t state_filtered = event->state & ~(xcb_numlock_mask | XCB_MOD_MASK_LOCK);
94 DLOG("(removed numlock, state = %d)\n", state_filtered);
95 /* Only use the lower 8 bits of the state (modifier masks) so that mouse
96 * button masks are filtered out */
97 state_filtered &= 0xFF;
98 DLOG("(removed upper 8 bits, state = %d)\n", state_filtered);
100 if (xkb_current_group == XkbGroup2Index)
101 state_filtered |= BIND_MODE_SWITCH;
103 DLOG("(checked mode_switch, state %d)\n", state_filtered);
105 /* Find the binding */
106 Binding *bind = get_binding(state_filtered, event->detail);
108 /* No match? Then the user has Mode_switch enabled but does not have a
109 * specific keybinding. Fall back to the default keybindings (without
110 * Mode_switch). Makes it much more convenient for users of a hybrid
111 * layout (like us, ru). */
113 state_filtered &= ~(BIND_MODE_SWITCH);
114 DLOG("no match, new state_filtered = %d\n", state_filtered);
115 if ((bind = get_binding(state_filtered, event->detail)) == NULL) {
116 ELOG("Could not lookup key binding (modifiers %d, keycode %d)\n",
117 state_filtered, event->detail);
122 char *command_copy = sstrdup(bind->command);
123 struct CommandResult *command_output = parse_command(command_copy);
126 if (command_output->needs_tree_render)
129 yajl_gen_free(command_output->json_gen);
133 * Called with coordinates of an enter_notify event or motion_notify event
134 * to check if the user crossed virtual screen boundaries and adjust the
135 * current workspace, if so.
138 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
141 /* If the user disable focus follows mouse, we have nothing to do here */
142 if (config.disable_focus_follows_mouse)
145 if ((output = get_output_containing(x, y)) == NULL) {
146 ELOG("ERROR: No such screen\n");
150 if (output->con == NULL) {
151 ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
155 /* Focus the output on which the user moved his cursor */
156 Con *old_focused = focused;
157 Con *next = con_descend_focused(output_get_content(output->con));
158 /* Since we are switching outputs, this *must* be a different workspace, so
159 * call workspace_show() */
160 workspace_show(con_get_workspace(next));
163 /* If the focus changed, we re-render to get updated decorations */
164 if (old_focused != focused)
169 * When the user moves the mouse pointer onto a window, this callback gets called.
172 static void handle_enter_notify(xcb_enter_notify_event_t *event) {
175 last_timestamp = event->time;
177 DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
178 event->event, event->mode, event->detail, event->sequence);
179 DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
180 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
181 DLOG("This was not a normal notify, ignoring\n");
184 /* Some events are not interesting, because they were not generated
185 * actively by the user, but by reconfiguration of windows */
186 if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
187 DLOG("Event ignored\n");
191 bool enter_child = false;
192 /* Get container by frame or by child window */
193 if ((con = con_by_frame_id(event->event)) == NULL) {
194 con = con_by_window_id(event->event);
198 /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
200 DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
201 check_crossing_screen_boundary(event->root_x, event->root_y);
205 if (con->parent->type == CT_DOCKAREA) {
206 DLOG("Ignoring, this is a dock client\n");
210 /* see if the user entered the window on a certain window decoration */
211 int layout = (enter_child ? con->parent->layout : con->layout);
212 if (layout == L_DEFAULT) {
214 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
215 if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
216 LOG("using child %p / %s instead!\n", child, child->name);
223 if (client->workspace != c_ws && client->workspace->output == c_ws->output) {
224 /* This can happen when a client gets assigned to a different workspace than
225 * the current one (see src/mainx.c:reparent_window). Shortly after it was created,
226 * an enter_notify will follow. */
227 DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
232 if (config.disable_focus_follows_mouse)
235 /* Get the currently focused workspace to check if the focus change also
236 * involves changing workspaces. If so, we need to call workspace_show() to
237 * correctly update state and send the IPC event. */
238 Con *ws = con_get_workspace(con);
239 if (ws != con_get_workspace(focused))
242 focused_id = XCB_NONE;
243 con_focus(con_descend_focused(con));
250 * When the user moves the mouse but does not change the active window
251 * (e.g. when having no windows opened but moving mouse on the root screen
252 * and crossing virtual screen boundaries), this callback gets called.
255 static void handle_motion_notify(xcb_motion_notify_event_t *event) {
257 last_timestamp = event->time;
259 /* Skip events where the pointer was over a child window, we are only
260 * interested in events on the root window. */
261 if (event->child != 0)
265 if ((con = con_by_frame_id(event->event)) == NULL) {
266 check_crossing_screen_boundary(event->root_x, event->root_y);
270 if (config.disable_focus_follows_mouse)
273 if (con->layout != L_DEFAULT)
276 /* see over which rect the user is */
278 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
279 if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
282 /* We found the rect, let’s see if this window is focused */
283 if (TAILQ_FIRST(&(con->focus_head)) == current)
287 x_push_changes(croot);
295 * Called when the keyboard mapping changes (for example by using Xmodmap),
296 * we need to update our key bindings then (re-translate symbols).
299 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
300 if (event->request != XCB_MAPPING_KEYBOARD &&
301 event->request != XCB_MAPPING_MODIFIER)
304 DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
305 xcb_refresh_keyboard_mapping(keysyms, event);
307 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
309 ungrab_all_keys(conn);
311 grab_all_keys(conn, false);
317 * A new window appeared on the screen (=was mapped), so let’s manage it.
320 static void handle_map_request(xcb_map_request_event_t *event) {
321 xcb_get_window_attributes_cookie_t cookie;
323 cookie = xcb_get_window_attributes_unchecked(conn, event->window);
325 DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
326 add_ignore_event(event->sequence, -1);
328 manage_window(event->window, cookie, false);
329 x_push_changes(croot);
334 * Configure requests are received when the application wants to resize windows
337 * We generate a synthethic configure notify event to signalize the client its
341 static void handle_configure_request(xcb_configure_request_event_t *event) {
344 DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
345 event->window, event->x, event->y, event->width, event->height);
347 /* For unmanaged windows, we just execute the configure request. As soon as
348 * it gets mapped, we will take over anyways. */
349 if ((con = con_by_window_id(event->window)) == NULL) {
350 DLOG("Configure request for unmanaged window, can do that.\n");
355 #define COPY_MASK_MEMBER(mask_member, event_member) do { \
356 if (event->value_mask & mask_member) { \
357 mask |= mask_member; \
358 values[c++] = event->event_member; \
362 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
363 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
364 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
365 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
366 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
367 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
368 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
370 xcb_configure_window(conn, event->window, mask, values);
376 DLOG("Configure request!\n");
377 if (con_is_floating(con) && con_is_leaf(con)) {
378 /* find the height for the decorations */
379 int deco_height = config.font.height + 5;
380 /* we actually need to apply the size/position changes to the *parent*
382 Rect bsr = con_border_style_rect(con);
383 if (con->border_style == BS_NORMAL) {
384 bsr.y += deco_height;
385 bsr.height -= deco_height;
387 Con *floatingcon = con->parent;
389 Rect newrect = floatingcon->rect;
391 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
392 newrect.x = event->x + (-1) * bsr.x;
393 DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
395 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
396 newrect.y = event->y + (-1) * bsr.y;
397 DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
399 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
400 newrect.width = event->width + (-1) * bsr.width;
401 newrect.width += con->border_width * 2;
402 DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
403 event->width, newrect.width, con->border_width);
405 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
406 newrect.height = event->height + (-1) * bsr.height;
407 newrect.height += con->border_width * 2;
408 DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
409 event->height, newrect.height, con->border_width);
412 DLOG("Container is a floating leaf node, will do that.\n");
413 floating_reposition(floatingcon, newrect);
417 /* Dock windows can be reconfigured in their height */
418 if (con->parent && con->parent->type == CT_DOCKAREA) {
419 DLOG("Dock window, only height reconfiguration allowed\n");
420 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
421 DLOG("Height given, changing\n");
423 con->geometry.height = event->height;
428 fake_absolute_configure_notify(con);
435 * Configuration notifies are only handled because we need to set up ignore for
436 * the following enter notify events.
439 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
440 DLOG("configure_event, sequence %d\n", event->sequence);
441 /* We ignore this sequence twice because events for child and frame should be ignored */
442 add_ignore_event(event->sequence);
443 add_ignore_event(event->sequence);
450 * Gets triggered upon a RandR screen change event, that is when the user
451 * changes the screen configuration in any way (mode, position, …)
454 static void handle_screen_change(xcb_generic_event_t *e) {
455 DLOG("RandR screen change\n");
457 randr_query_outputs();
459 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
465 * Our window decorations were unmapped. That means, the window will be killed
466 * now, so we better clean up before.
469 static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
470 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
471 xcb_get_input_focus_cookie_t cookie;
472 Con *con = con_by_window_id(event->window);
474 /* This could also be an UnmapNotify for the frame. We need to
475 * decrement the ignore_unmap counter. */
476 con = con_by_frame_id(event->window);
478 LOG("Not a managed window, ignoring UnmapNotify event\n");
482 if (con->ignore_unmap > 0)
484 /* See the end of this function. */
485 cookie = xcb_get_input_focus(conn);
486 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
490 /* See the end of this function. */
491 cookie = xcb_get_input_focus(conn);
493 if (con->ignore_unmap > 0) {
494 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
499 tree_close(con, DONT_KILL_WINDOW, false, false);
501 x_push_changes(croot);
504 /* If the client (as opposed to i3) destroyed or unmapped a window, an
505 * EnterNotify event will follow (indistinguishable from an EnterNotify
506 * event caused by moving your mouse), causing i3 to set focus to whichever
507 * window is now visible.
509 * In a complex stacked or tabbed layout (take two v-split containers in a
510 * tabbed container), when the bottom window in tab2 is closed, the bottom
511 * window of tab1 is visible instead. X11 will thus send an EnterNotify
512 * event for the bottom window of tab1, while the focus should be set to
513 * the remaining window of tab2.
515 * Therefore, we ignore all EnterNotify events which have the same sequence
516 * as an UnmapNotify event. */
517 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
519 /* Since we just ignored the sequence of this UnmapNotify, we want to make
520 * sure that following events use a different sequence. When putting xterm
521 * into fullscreen and moving the pointer to a different window, without
522 * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
523 * with the same sequence and thus were ignored (see ticket #609). */
524 free(xcb_get_input_focus_reply(conn, cookie, NULL));
528 * A destroy notify event is sent when the window is not unmapped, but
529 * immediately destroyed (for example when starting a window and immediately
530 * killing the program which started it).
532 * We just pass on the event to the unmap notify handler (by copying the
533 * important fields in the event data structure).
536 static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
537 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
539 xcb_unmap_notify_event_t unmap;
540 unmap.sequence = event->sequence;
541 unmap.event = event->event;
542 unmap.window = event->window;
544 handle_unmap_notify_event(&unmap);
548 * Called when a window changes its title
551 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
552 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
554 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
557 window_update_name(con->window, prop, false);
559 x_push_changes(croot);
565 * Handles legacy window name updates (WM_NAME), see also src/window.c,
566 * window_update_name_legacy().
569 static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
570 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
572 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
575 window_update_name_legacy(con->window, prop, false);
577 x_push_changes(croot);
583 * Called when a window changes its WM_WINDOW_ROLE.
586 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
587 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
589 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
592 window_update_role(con->window, prop, false);
599 * Updates the client’s WM_CLASS property
602 static int handle_windowclass_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_class(con->window, prop, false);
615 * Expose event means we should redraw our windows (= title bar)
618 static void handle_expose_event(xcb_expose_event_t *event) {
621 DLOG("window = %08x\n", event->window);
623 if ((parent = con_by_frame_id(event->window)) == NULL) {
624 LOG("expose event for unknown window, ignoring\n");
628 /* Since we render to our pixmap on every change anyways, expose events
629 * only tell us that the X server lost (parts of) the window contents. We
630 * can handle that by copying the appropriate part from our pixmap to the
632 xcb_copy_area(conn, parent->pixmap, parent->frame, parent->pm_gc,
633 event->x, event->y, event->x, event->y,
634 event->width, event->height);
641 * Handle client messages (EWMH)
644 static void handle_client_message(xcb_client_message_event_t *event) {
645 /* If this is a startup notification ClientMessage, the library will handle
646 * it and call our monitor_event() callback. */
647 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t*)event))
650 LOG("ClientMessage for window 0x%08x\n", event->window);
651 if (event->type == A__NET_WM_STATE) {
652 if (event->format != 32 || event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN) {
653 DLOG("atom in clientmessage is %d, fullscreen is %d\n",
654 event->data.data32[1], A__NET_WM_STATE_FULLSCREEN);
655 DLOG("not about fullscreen atom\n");
659 Con *con = con_by_window_id(event->window);
661 DLOG("Could not get window for client message\n");
665 /* Check if the fullscreen state should be toggled */
666 if ((con->fullscreen_mode != CF_NONE &&
667 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
668 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
669 (con->fullscreen_mode == CF_NONE &&
670 (event->data.data32[0] == _NET_WM_STATE_ADD ||
671 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
672 DLOG("toggling fullscreen\n");
673 con_toggle_fullscreen(con, CF_OUTPUT);
677 x_push_changes(croot);
678 } else if (event->type == A_I3_SYNC) {
679 DLOG("i3 sync, yay\n");
680 xcb_window_t window = event->data.data32[0];
681 uint32_t rnd = event->data.data32[1];
682 DLOG("Sending random value %d back to X11 window 0x%08x\n", rnd, window);
684 void *reply = scalloc(32);
685 xcb_client_message_event_t *ev = reply;
687 ev->response_type = XCB_CLIENT_MESSAGE;
689 ev->type = A_I3_SYNC;
691 ev->data.data32[0] = window;
692 ev->data.data32[1] = rnd;
694 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
698 DLOG("unhandled clientmessage\n");
704 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
705 xcb_atom_t atom, xcb_get_property_reply_t *property) {
706 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
707 before changing this property. */
708 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
714 * Handles the size hints set by a window, but currently only the part necessary for displaying
715 * clients proportionally inside their frames (mplayer for example)
717 * See ICCCM 4.1.2.3 for more details
720 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
721 xcb_atom_t name, xcb_get_property_reply_t *reply) {
722 Con *con = con_by_window_id(window);
724 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
728 xcb_size_hints_t size_hints;
730 //CLIENT_LOG(client);
732 /* If the hints were already in this event, use them, if not, request them */
734 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
736 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
738 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
739 // TODO: Minimum size is not yet implemented
740 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
743 bool changed = false;
744 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
745 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
746 if (con->width_increment != size_hints.width_inc) {
747 con->width_increment = size_hints.width_inc;
750 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
751 if (con->height_increment != size_hints.height_inc) {
752 con->height_increment = size_hints.height_inc;
757 DLOG("resize increments changed\n");
760 int base_width = 0, base_height = 0;
762 /* base_width/height are the desired size of the window.
763 We check if either the program-specified size or the program-specified
764 min-size is available */
765 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
766 base_width = size_hints.base_width;
767 base_height = size_hints.base_height;
768 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
769 /* TODO: is this right? icccm says not */
770 base_width = size_hints.min_width;
771 base_height = size_hints.min_height;
774 if (base_width != con->base_width ||
775 base_height != con->base_height) {
776 con->base_width = base_width;
777 con->base_height = base_height;
778 DLOG("client's base_height changed to %d\n", base_height);
779 DLOG("client's base_width changed to %d\n", base_width);
783 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
784 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
785 (size_hints.min_aspect_num <= 0) ||
786 (size_hints.min_aspect_den <= 0)) {
787 goto render_and_return;
790 /* XXX: do we really use rect here, not window_rect? */
791 double width = con->rect.width - base_width;
792 double height = con->rect.height - base_height;
793 /* Convert numerator/denominator to a double */
794 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
795 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
797 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
798 DLOG("width = %f, height = %f\n", width, height);
800 /* Sanity checks, this is user-input, in a way */
801 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
802 goto render_and_return;
804 /* Check if we need to set proportional_* variables using the correct ratio */
805 if ((width / height) < min_aspect) {
806 if (con->proportional_width != width ||
807 con->proportional_height != (width / min_aspect)) {
808 con->proportional_width = width;
809 con->proportional_height = width / min_aspect;
812 } else if ((width / height) > max_aspect) {
813 if (con->proportional_width != width ||
814 con->proportional_height != (width / max_aspect)) {
815 con->proportional_width = width;
816 con->proportional_height = width / max_aspect;
819 } else goto render_and_return;
829 * Handles the WM_HINTS property for extracting the urgency state of the window.
832 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
833 xcb_atom_t name, xcb_get_property_reply_t *reply) {
834 Con *con = con_by_window_id(window);
836 DLOG("Received WM_HINTS for unknown client\n");
840 xcb_icccm_wm_hints_t hints;
843 if (!(reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL)))
846 if (!xcb_icccm_get_wm_hints_from_reply(&hints, reply))
849 if (!con->urgent && focused == con) {
850 DLOG("Ignoring urgency flag for current client\n");
851 con->window->urgent.tv_sec = 0;
852 con->window->urgent.tv_usec = 0;
856 /* Update the flag on the client directly */
857 con->urgent = (xcb_icccm_wm_hints_get_urgency(&hints) != 0);
861 gettimeofday(&con->window->urgent, NULL);
863 con->window->urgent.tv_sec = 0;
864 con->window->urgent.tv_usec = 0;
867 LOG("Urgency flag changed to %d\n", con->urgent);
870 /* Set the urgency flag on the workspace, if a workspace could be found
871 * (for dock clients, that is not the case). */
872 if ((ws = con_get_workspace(con)) != NULL)
873 workspace_update_urgent_flag(ws);
879 window_update_hints(con->window, reply);
885 * Handles the transient for hints set by a window, signalizing that this window is a popup window
886 * for some other window.
888 * See ICCCM 4.1.2.6 for more details
891 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
892 xcb_atom_t name, xcb_get_property_reply_t *prop) {
895 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
896 DLOG("No such window\n");
901 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
902 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32), NULL);
907 window_update_transient_for(con->window, prop);
913 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
914 * toolwindow (or similar) and to which window it belongs (logical parent).
917 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
918 xcb_atom_t name, xcb_get_property_reply_t *prop) {
920 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
924 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
925 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32), NULL);
930 window_update_leader(con->window, prop);
936 * Handles FocusIn events which are generated by clients (i3’s focus changes
937 * don’t generate FocusIn events due to a different EventMask) and updates the
938 * decorations accordingly.
941 static void handle_focus_in(xcb_focus_in_event_t *event) {
942 DLOG("focus change in, for window 0x%08x\n", event->event);
944 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
946 DLOG("That is con %p / %s\n", con, con->name);
948 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
949 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
950 DLOG("FocusIn event for grab/ungrab, ignoring\n");
954 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
955 DLOG("notify detail is pointer, ignoring this event\n");
959 if (focused_id == event->event) {
960 DLOG("focus matches the currently focused window, not doing anything\n");
964 /* Skip dock clients, they cannot get the i3 focus. */
965 if (con->parent->type == CT_DOCKAREA) {
966 DLOG("This is a dock client, not focusing.\n");
970 DLOG("focus is different, updating decorations\n");
972 /* Get the currently focused workspace to check if the focus change also
973 * involves changing workspaces. If so, we need to call workspace_show() to
974 * correctly update state and send the IPC event. */
975 Con *ws = con_get_workspace(con);
976 if (ws != con_get_workspace(focused))
980 /* We update focused_id because we don’t need to set focus again */
981 focused_id = event->event;
982 x_push_changes(croot);
986 /* Returns false if the event could not be processed (e.g. the window could not
987 * be found), true otherwise */
988 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);
990 struct property_handler_t {
993 cb_property_handler_t cb;
996 static struct property_handler_t property_handlers[] = {
997 { 0, 128, handle_windowname_change },
998 { 0, UINT_MAX, handle_hints },
999 { 0, 128, handle_windowname_change_legacy },
1000 { 0, UINT_MAX, handle_normal_hints },
1001 { 0, UINT_MAX, handle_clientleader_change },
1002 { 0, UINT_MAX, handle_transient_for },
1003 { 0, 128, handle_windowrole_change }
1005 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
1008 * Sets the appropriate atoms for the property handlers after the atoms were
1012 void property_handlers_init(void) {
1014 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
1016 property_handlers[0].atom = A__NET_WM_NAME;
1017 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1018 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1019 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1020 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1021 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1022 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1025 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1026 struct property_handler_t *handler = NULL;
1027 xcb_get_property_reply_t *propr = NULL;
1029 for (int c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1030 if (property_handlers[c].atom != atom)
1033 handler = &property_handlers[c];
1037 if (handler == NULL) {
1038 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1042 if (state != XCB_PROPERTY_DELETE) {
1043 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1044 propr = xcb_get_property_reply(conn, cookie, 0);
1047 /* the handler will free() the reply unless it returns false */
1048 if (!handler->cb(NULL, conn, state, window, atom, propr))
1053 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1057 void handle_event(int type, xcb_generic_event_t *event) {
1058 if (randr_base > -1 &&
1059 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1060 handle_screen_change(event);
1066 handle_key_press((xcb_key_press_event_t*)event);
1069 case XCB_BUTTON_PRESS:
1070 handle_button_press((xcb_button_press_event_t*)event);
1073 case XCB_MAP_REQUEST:
1074 handle_map_request((xcb_map_request_event_t*)event);
1077 case XCB_UNMAP_NOTIFY:
1078 handle_unmap_notify_event((xcb_unmap_notify_event_t*)event);
1081 case XCB_DESTROY_NOTIFY:
1082 handle_destroy_notify_event((xcb_destroy_notify_event_t*)event);
1086 handle_expose_event((xcb_expose_event_t*)event);
1089 case XCB_MOTION_NOTIFY:
1090 handle_motion_notify((xcb_motion_notify_event_t*)event);
1093 /* Enter window = user moved his mouse over the window */
1094 case XCB_ENTER_NOTIFY:
1095 handle_enter_notify((xcb_enter_notify_event_t*)event);
1098 /* Client message are sent to the root window. The only interesting
1099 * client message for us is _NET_WM_STATE, we honour
1100 * _NET_WM_STATE_FULLSCREEN */
1101 case XCB_CLIENT_MESSAGE:
1102 handle_client_message((xcb_client_message_event_t*)event);
1105 /* Configure request = window tried to change size on its own */
1106 case XCB_CONFIGURE_REQUEST:
1107 handle_configure_request((xcb_configure_request_event_t*)event);
1110 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1111 case XCB_MAPPING_NOTIFY:
1112 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
1116 handle_focus_in((xcb_focus_in_event_t*)event);
1119 case XCB_PROPERTY_NOTIFY: {
1120 xcb_property_notify_event_t *e = (xcb_property_notify_event_t*)event;
1121 last_timestamp = e->time;
1122 property_notify(e->state, e->window, e->atom);
1127 //DLOG("Unhandled event of type %d\n", type);