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,
18 #include <xcb/randr.h>
19 #include <X11/XKBlib.h>
20 #define SN_API_NOT_YET_FROZEN 1
21 #include <libsn/sn-monitor.h>
25 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
26 since it’d trigger an infinite loop of switching between the different windows when
27 changing workspaces */
28 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
31 * Adds the given sequence to the list of events which are ignored.
32 * If this ignore should only affect a specific response_type, pass
33 * response_type, otherwise, pass -1.
35 * Every ignored sequence number gets garbage collected after 5 seconds.
38 void add_ignore_event(const int sequence, const int response_type) {
39 struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
41 event->sequence = sequence;
42 event->response_type = response_type;
43 event->added = time(NULL);
45 SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
49 * Checks if the given sequence is ignored and returns true if so.
52 bool event_is_ignored(const int sequence, const int response_type) {
53 struct Ignore_Event *event;
54 time_t now = time(NULL);
55 for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
56 if ((now - event->added) > 5) {
57 struct Ignore_Event *save = event;
58 event = SLIST_NEXT(event, ignore_events);
59 SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
61 } else event = SLIST_NEXT(event, ignore_events);
64 SLIST_FOREACH(event, &ignore_events, ignore_events) {
65 if (event->sequence != sequence)
68 if (event->response_type != -1 &&
69 event->response_type != response_type)
72 /* instead of removing a sequence number we better wait until it gets
73 * garbage collected. it may generate multiple events (there are multiple
74 * enter_notifies for one configure_request, for example). */
75 //SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
84 * Called with coordinates of an enter_notify event or motion_notify event
85 * to check if the user crossed virtual screen boundaries and adjust the
86 * current workspace, if so.
89 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
92 /* If the user disable focus follows mouse, we have nothing to do here */
93 if (config.disable_focus_follows_mouse)
96 if ((output = get_output_containing(x, y)) == NULL) {
97 ELOG("ERROR: No such screen\n");
101 if (output->con == NULL) {
102 ELOG("ERROR: The screen is not recognized by i3 (no container associated)\n");
106 /* Focus the output on which the user moved his cursor */
107 Con *old_focused = focused;
108 Con *next = con_descend_focused(output_get_content(output->con));
109 /* Since we are switching outputs, this *must* be a different workspace, so
110 * call workspace_show() */
111 workspace_show(con_get_workspace(next));
114 /* If the focus changed, we re-render to get updated decorations */
115 if (old_focused != focused)
120 * When the user moves the mouse pointer onto a window, this callback gets called.
123 static void handle_enter_notify(xcb_enter_notify_event_t *event) {
126 last_timestamp = event->time;
128 DLOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n",
129 event->event, event->mode, event->detail, event->sequence);
130 DLOG("coordinates %d, %d\n", event->event_x, event->event_y);
131 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
132 DLOG("This was not a normal notify, ignoring\n");
135 /* Some events are not interesting, because they were not generated
136 * actively by the user, but by reconfiguration of windows */
137 if (event_is_ignored(event->sequence, XCB_ENTER_NOTIFY)) {
138 DLOG("Event ignored\n");
142 bool enter_child = false;
143 /* Get container by frame or by child window */
144 if ((con = con_by_frame_id(event->event)) == NULL) {
145 con = con_by_window_id(event->event);
149 /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
151 DLOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
152 check_crossing_screen_boundary(event->root_x, event->root_y);
156 if (con->parent->type == CT_DOCKAREA) {
157 DLOG("Ignoring, this is a dock client\n");
161 /* see if the user entered the window on a certain window decoration */
162 layout_t layout = (enter_child ? con->parent->layout : con->layout);
163 if (layout == L_DEFAULT) {
165 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
166 if (rect_contains(child->deco_rect, event->event_x, event->event_y)) {
167 LOG("using child %p / %s instead!\n", child, child->name);
174 if (client->workspace != c_ws && client->workspace->output == c_ws->output) {
175 /* This can happen when a client gets assigned to a different workspace than
176 * the current one (see src/mainx.c:reparent_window). Shortly after it was created,
177 * an enter_notify will follow. */
178 DLOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
183 if (config.disable_focus_follows_mouse)
186 /* Get the currently focused workspace to check if the focus change also
187 * involves changing workspaces. If so, we need to call workspace_show() to
188 * correctly update state and send the IPC event. */
189 Con *ws = con_get_workspace(con);
190 if (ws != con_get_workspace(focused))
193 focused_id = XCB_NONE;
194 con_focus(con_descend_focused(con));
201 * When the user moves the mouse but does not change the active window
202 * (e.g. when having no windows opened but moving mouse on the root screen
203 * and crossing virtual screen boundaries), this callback gets called.
206 static void handle_motion_notify(xcb_motion_notify_event_t *event) {
208 last_timestamp = event->time;
210 /* Skip events where the pointer was over a child window, we are only
211 * interested in events on the root window. */
212 if (event->child != 0)
216 if ((con = con_by_frame_id(event->event)) == NULL) {
217 DLOG("MotionNotify for an unknown container, checking if it crosses screen boundaries.\n");
218 check_crossing_screen_boundary(event->root_x, event->root_y);
222 if (config.disable_focus_follows_mouse)
225 if (con->layout != L_DEFAULT)
228 /* see over which rect the user is */
230 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
231 if (!rect_contains(current->deco_rect, event->event_x, event->event_y))
234 /* We found the rect, let’s see if this window is focused */
235 if (TAILQ_FIRST(&(con->focus_head)) == current)
239 x_push_changes(croot);
247 * Called when the keyboard mapping changes (for example by using Xmodmap),
248 * we need to update our key bindings then (re-translate symbols).
251 static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
252 if (event->request != XCB_MAPPING_KEYBOARD &&
253 event->request != XCB_MAPPING_MODIFIER)
256 DLOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
257 xcb_refresh_keyboard_mapping(keysyms, event);
259 xcb_numlock_mask = aio_get_mod_mask_for(XCB_NUM_LOCK, keysyms);
261 ungrab_all_keys(conn);
263 grab_all_keys(conn, false);
269 * A new window appeared on the screen (=was mapped), so let’s manage it.
272 static void handle_map_request(xcb_map_request_event_t *event) {
273 xcb_get_window_attributes_cookie_t cookie;
275 cookie = xcb_get_window_attributes_unchecked(conn, event->window);
277 DLOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
278 add_ignore_event(event->sequence, -1);
280 manage_window(event->window, cookie, false);
281 x_push_changes(croot);
286 * Configure requests are received when the application wants to resize windows
289 * We generate a synthethic configure notify event to signalize the client its
293 static void handle_configure_request(xcb_configure_request_event_t *event) {
296 DLOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
297 event->window, event->x, event->y, event->width, event->height);
299 /* For unmanaged windows, we just execute the configure request. As soon as
300 * it gets mapped, we will take over anyways. */
301 if ((con = con_by_window_id(event->window)) == NULL) {
302 DLOG("Configure request for unmanaged window, can do that.\n");
307 #define COPY_MASK_MEMBER(mask_member, event_member) do { \
308 if (event->value_mask & mask_member) { \
309 mask |= mask_member; \
310 values[c++] = event->event_member; \
314 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
315 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
316 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
317 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
318 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
319 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
320 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
322 xcb_configure_window(conn, event->window, mask, values);
328 DLOG("Configure request!\n");
330 Con *workspace = con_get_workspace(con),
333 /* There might not be a corresponding workspace for dock cons, therefore we
334 * have to be careful here. */
336 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
338 fullscreen = con_get_fullscreen_con(workspace, CF_GLOBAL);
341 if (fullscreen != con && con_is_floating(con) && con_is_leaf(con)) {
342 /* find the height for the decorations */
343 int deco_height = con->deco_rect.height;
344 /* we actually need to apply the size/position changes to the *parent*
346 Rect bsr = con_border_style_rect(con);
347 if (con->border_style == BS_NORMAL) {
348 bsr.y += deco_height;
349 bsr.height -= deco_height;
351 Con *floatingcon = con->parent;
353 if (strcmp(con_get_workspace(floatingcon)->name, "__i3_scratch") == 0) {
354 DLOG("This is a scratchpad container, ignoring ConfigureRequest\n");
358 Rect newrect = floatingcon->rect;
360 if (event->value_mask & XCB_CONFIG_WINDOW_X) {
361 newrect.x = event->x + (-1) * bsr.x;
362 DLOG("proposed x = %d, new x is %d\n", event->x, newrect.x);
364 if (event->value_mask & XCB_CONFIG_WINDOW_Y) {
365 newrect.y = event->y + (-1) * bsr.y;
366 DLOG("proposed y = %d, new y is %d\n", event->y, newrect.y);
368 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH) {
369 newrect.width = event->width + (-1) * bsr.width;
370 newrect.width += con->border_width * 2;
371 DLOG("proposed width = %d, new width is %d (x11 border %d)\n",
372 event->width, newrect.width, con->border_width);
374 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
375 newrect.height = event->height + (-1) * bsr.height;
376 newrect.height += con->border_width * 2;
377 DLOG("proposed height = %d, new height is %d (x11 border %d)\n",
378 event->height, newrect.height, con->border_width);
381 DLOG("Container is a floating leaf node, will do that.\n");
382 floating_reposition(floatingcon, newrect);
386 /* Dock windows can be reconfigured in their height */
387 if (con->parent && con->parent->type == CT_DOCKAREA) {
388 DLOG("Dock window, only height reconfiguration allowed\n");
389 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT) {
390 DLOG("Height given, changing\n");
392 con->geometry.height = event->height;
397 fake_absolute_configure_notify(con);
404 * Configuration notifies are only handled because we need to set up ignore for
405 * the following enter notify events.
408 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
409 DLOG("configure_event, sequence %d\n", event->sequence);
410 /* We ignore this sequence twice because events for child and frame should be ignored */
411 add_ignore_event(event->sequence);
412 add_ignore_event(event->sequence);
419 * Gets triggered upon a RandR screen change event, that is when the user
420 * changes the screen configuration in any way (mode, position, …)
423 static void handle_screen_change(xcb_generic_event_t *e) {
424 DLOG("RandR screen change\n");
426 randr_query_outputs();
428 scratchpad_fix_resolution();
430 ipc_send_event("output", I3_IPC_EVENT_OUTPUT, "{\"change\":\"unspecified\"}");
436 * Our window decorations were unmapped. That means, the window will be killed
437 * now, so we better clean up before.
440 static void handle_unmap_notify_event(xcb_unmap_notify_event_t *event) {
441 DLOG("UnmapNotify for 0x%08x (received from 0x%08x), serial %d\n", event->window, event->event, event->sequence);
442 xcb_get_input_focus_cookie_t cookie;
443 Con *con = con_by_window_id(event->window);
445 /* This could also be an UnmapNotify for the frame. We need to
446 * decrement the ignore_unmap counter. */
447 con = con_by_frame_id(event->window);
449 LOG("Not a managed window, ignoring UnmapNotify event\n");
453 if (con->ignore_unmap > 0)
455 /* See the end of this function. */
456 cookie = xcb_get_input_focus(conn);
457 DLOG("ignore_unmap = %d for frame of container %p\n", con->ignore_unmap, con);
461 /* See the end of this function. */
462 cookie = xcb_get_input_focus(conn);
464 if (con->ignore_unmap > 0) {
465 DLOG("ignore_unmap = %d, dec\n", con->ignore_unmap);
470 tree_close(con, DONT_KILL_WINDOW, false, false);
472 x_push_changes(croot);
475 /* If the client (as opposed to i3) destroyed or unmapped a window, an
476 * EnterNotify event will follow (indistinguishable from an EnterNotify
477 * event caused by moving your mouse), causing i3 to set focus to whichever
478 * window is now visible.
480 * In a complex stacked or tabbed layout (take two v-split containers in a
481 * tabbed container), when the bottom window in tab2 is closed, the bottom
482 * window of tab1 is visible instead. X11 will thus send an EnterNotify
483 * event for the bottom window of tab1, while the focus should be set to
484 * the remaining window of tab2.
486 * Therefore, we ignore all EnterNotify events which have the same sequence
487 * as an UnmapNotify event. */
488 add_ignore_event(event->sequence, XCB_ENTER_NOTIFY);
490 /* Since we just ignored the sequence of this UnmapNotify, we want to make
491 * sure that following events use a different sequence. When putting xterm
492 * into fullscreen and moving the pointer to a different window, without
493 * using GetInputFocus, subsequent (legitimate) EnterNotify events arrived
494 * with the same sequence and thus were ignored (see ticket #609). */
495 free(xcb_get_input_focus_reply(conn, cookie, NULL));
499 * A destroy notify event is sent when the window is not unmapped, but
500 * immediately destroyed (for example when starting a window and immediately
501 * killing the program which started it).
503 * We just pass on the event to the unmap notify handler (by copying the
504 * important fields in the event data structure).
507 static void handle_destroy_notify_event(xcb_destroy_notify_event_t *event) {
508 DLOG("destroy notify for 0x%08x, 0x%08x\n", event->event, event->window);
510 xcb_unmap_notify_event_t unmap;
511 unmap.sequence = event->sequence;
512 unmap.event = event->event;
513 unmap.window = event->window;
515 handle_unmap_notify_event(&unmap);
519 * Called when a window changes its title
522 static bool handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
523 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
525 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
528 window_update_name(con->window, prop, false);
530 x_push_changes(croot);
536 * Handles legacy window name updates (WM_NAME), see also src/window.c,
537 * window_update_name_legacy().
540 static bool handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
541 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
543 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
546 window_update_name_legacy(con->window, prop, false);
548 x_push_changes(croot);
554 * Called when a window changes its WM_WINDOW_ROLE.
557 static bool handle_windowrole_change(void *data, xcb_connection_t *conn, uint8_t state,
558 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
560 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
563 window_update_role(con->window, prop, false);
570 * Updates the client’s WM_CLASS property
573 static int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
574 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
576 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
579 window_update_class(con->window, prop, false);
586 * Expose event means we should redraw our windows (= title bar)
589 static void handle_expose_event(xcb_expose_event_t *event) {
592 DLOG("window = %08x\n", event->window);
594 if ((parent = con_by_frame_id(event->window)) == NULL) {
595 LOG("expose event for unknown window, ignoring\n");
599 /* Since we render to our pixmap on every change anyways, expose events
600 * only tell us that the X server lost (parts of) the window contents. We
601 * can handle that by copying the appropriate part from our pixmap to the
603 xcb_copy_area(conn, parent->pixmap, parent->frame, parent->pm_gc,
604 event->x, event->y, event->x, event->y,
605 event->width, event->height);
612 * Handle client messages (EWMH)
615 static void handle_client_message(xcb_client_message_event_t *event) {
616 /* If this is a startup notification ClientMessage, the library will handle
617 * it and call our monitor_event() callback. */
618 if (sn_xcb_display_process_event(sndisplay, (xcb_generic_event_t*)event))
621 LOG("ClientMessage for window 0x%08x\n", event->window);
622 if (event->type == A__NET_WM_STATE) {
623 if (event->format != 32 ||
624 (event->data.data32[1] != A__NET_WM_STATE_FULLSCREEN &&
625 event->data.data32[1] != A__NET_WM_STATE_DEMANDS_ATTENTION)) {
626 DLOG("Unknown atom in clientmessage of type %d\n", event->data.data32[1]);
630 Con *con = con_by_window_id(event->window);
632 DLOG("Could not get window for client message\n");
636 if (event->data.data32[1] == A__NET_WM_STATE_FULLSCREEN) {
637 /* Check if the fullscreen state should be toggled */
638 if ((con->fullscreen_mode != CF_NONE &&
639 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
640 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
641 (con->fullscreen_mode == CF_NONE &&
642 (event->data.data32[0] == _NET_WM_STATE_ADD ||
643 event->data.data32[0] == _NET_WM_STATE_TOGGLE))) {
644 DLOG("toggling fullscreen\n");
645 con_toggle_fullscreen(con, CF_OUTPUT);
647 } else if (event->data.data32[1] == A__NET_WM_STATE_DEMANDS_ATTENTION) {
648 /* Check if the urgent flag must be set or not */
649 if (event->data.data32[0] == _NET_WM_STATE_ADD)
650 con_set_urgency(con, true);
651 else if (event->data.data32[0] == _NET_WM_STATE_REMOVE)
652 con_set_urgency(con, false);
653 else if (event->data.data32[0] == _NET_WM_STATE_TOGGLE)
654 con_set_urgency(con, !con->urgent);
658 } else if (event->type == A__NET_ACTIVE_WINDOW) {
659 DLOG("_NET_ACTIVE_WINDOW: Window 0x%08x should be activated\n", event->window);
660 Con *con = con_by_window_id(event->window);
662 DLOG("Could not get window for client message\n");
666 Con *ws = con_get_workspace(con);
667 if (!workspace_is_visible(ws)) {
668 DLOG("Workspace not visible, ignoring _NET_ACTIVE_WINDOW\n");
672 if (ws != con_get_workspace(focused))
677 } else if (event->type == A_I3_SYNC) {
678 xcb_window_t window = event->data.data32[0];
679 uint32_t rnd = event->data.data32[1];
680 DLOG("[i3 sync protocol] Sending random value %d back to X11 window 0x%08x\n", rnd, window);
682 void *reply = scalloc(32);
683 xcb_client_message_event_t *ev = reply;
685 ev->response_type = XCB_CLIENT_MESSAGE;
687 ev->type = A_I3_SYNC;
689 ev->data.data32[0] = window;
690 ev->data.data32[1] = rnd;
692 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
695 } else if (event->type == A__NET_REQUEST_FRAME_EXTENTS) {
696 // A client can request an estimate for the frame size which the window
697 // manager will put around it before actually mapping its window. Java
698 // does this (as of openjdk-7).
700 // Note that the calculation below is not entirely accurate — once you
701 // set a different border type, it’s off. We _could_ request all the
702 // window properties (which have to be set up at this point according
703 // to EWMH), but that seems rather elaborate. The standard explicitly
704 // says the application must cope with an estimate that is not entirely
706 DLOG("_NET_REQUEST_FRAME_EXTENTS for window 0x%08x\n", event->window);
707 xcb_get_geometry_reply_t *geometry;
708 xcb_get_geometry_cookie_t cookie = xcb_get_geometry(conn, event->window);
710 if (!(geometry = xcb_get_geometry_reply(conn, cookie, NULL))) {
711 ELOG("Could not get geometry of X11 window 0x%08x while handling "
712 "the _NET_REQUEST_FRAME_EXTENTS ClientMessage\n",
717 DLOG("Current geometry = x=%d, y=%d, width=%d, height=%d\n",
718 geometry->x, geometry->y, geometry->width, geometry->height);
722 geometry->width + 4, // right
724 geometry->height + config.font.height + 5, // bottom
728 XCB_PROP_MODE_REPLACE,
730 A__NET_FRAME_EXTENTS,
731 XCB_ATOM_CARDINAL, 32, 4,
735 DLOG("unhandled clientmessage\n");
741 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
742 xcb_atom_t atom, xcb_get_property_reply_t *property) {
743 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
744 before changing this property. */
745 ELOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
751 * Handles the size hints set by a window, but currently only the part necessary for displaying
752 * clients proportionally inside their frames (mplayer for example)
754 * See ICCCM 4.1.2.3 for more details
757 static bool handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
758 xcb_atom_t name, xcb_get_property_reply_t *reply) {
759 Con *con = con_by_window_id(window);
761 DLOG("Received WM_NORMAL_HINTS for unknown client\n");
765 xcb_size_hints_t size_hints;
767 //CLIENT_LOG(client);
769 /* If the hints were already in this event, use them, if not, request them */
771 xcb_icccm_get_wm_size_hints_from_reply(&size_hints, reply);
773 xcb_icccm_get_wm_normal_hints_reply(conn, xcb_icccm_get_wm_normal_hints_unchecked(conn, con->window->id), &size_hints, NULL);
775 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE)) {
776 // TODO: Minimum size is not yet implemented
777 DLOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
780 bool changed = false;
781 if ((size_hints.flags & XCB_ICCCM_SIZE_HINT_P_RESIZE_INC)) {
782 if (size_hints.width_inc > 0 && size_hints.width_inc < 0xFFFF)
783 if (con->width_increment != size_hints.width_inc) {
784 con->width_increment = size_hints.width_inc;
787 if (size_hints.height_inc > 0 && size_hints.height_inc < 0xFFFF)
788 if (con->height_increment != size_hints.height_inc) {
789 con->height_increment = size_hints.height_inc;
794 DLOG("resize increments changed\n");
797 int base_width = 0, base_height = 0;
799 /* base_width/height are the desired size of the window.
800 We check if either the program-specified size or the program-specified
801 min-size is available */
802 if (size_hints.flags & XCB_ICCCM_SIZE_HINT_BASE_SIZE) {
803 base_width = size_hints.base_width;
804 base_height = size_hints.base_height;
805 } else if (size_hints.flags & XCB_ICCCM_SIZE_HINT_P_MIN_SIZE) {
806 /* TODO: is this right? icccm says not */
807 base_width = size_hints.min_width;
808 base_height = size_hints.min_height;
811 if (base_width != con->base_width ||
812 base_height != con->base_height) {
813 con->base_width = base_width;
814 con->base_height = base_height;
815 DLOG("client's base_height changed to %d\n", base_height);
816 DLOG("client's base_width changed to %d\n", base_width);
820 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
821 if (!(size_hints.flags & XCB_ICCCM_SIZE_HINT_P_ASPECT) ||
822 (size_hints.min_aspect_num <= 0) ||
823 (size_hints.min_aspect_den <= 0)) {
824 goto render_and_return;
827 /* XXX: do we really use rect here, not window_rect? */
828 double width = con->rect.width - base_width;
829 double height = con->rect.height - base_height;
830 /* Convert numerator/denominator to a double */
831 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
832 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
834 DLOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
835 DLOG("width = %f, height = %f\n", width, height);
837 /* Sanity checks, this is user-input, in a way */
838 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
839 goto render_and_return;
841 /* Check if we need to set proportional_* variables using the correct ratio */
842 double aspect_ratio = 0.0;
843 if ((width / height) < min_aspect) {
844 aspect_ratio = min_aspect;
845 } else if ((width / height) > max_aspect) {
846 aspect_ratio = max_aspect;
847 } else goto render_and_return;
849 if (fabs(con->aspect_ratio - aspect_ratio) > DBL_EPSILON) {
850 con->aspect_ratio = aspect_ratio;
862 * Handles the WM_HINTS property for extracting the urgency state of the window.
865 static bool handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
866 xcb_atom_t name, xcb_get_property_reply_t *reply) {
867 Con *con = con_by_window_id(window);
869 DLOG("Received WM_HINTS for unknown client\n");
873 xcb_icccm_wm_hints_t hints;
876 if (!(reply = xcb_get_property_reply(conn, xcb_icccm_get_wm_hints(conn, window), NULL)))
879 if (!xcb_icccm_get_wm_hints_from_reply(&hints, reply))
882 /* Update the flag on the client directly */
883 bool hint_urgent = (xcb_icccm_wm_hints_get_urgency(&hints) != 0);
884 con_set_urgency(con, hint_urgent);
889 window_update_hints(con->window, reply);
895 * Handles the transient for hints set by a window, signalizing that this window is a popup window
896 * for some other window.
898 * See ICCCM 4.1.2.6 for more details
901 static bool handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
902 xcb_atom_t name, xcb_get_property_reply_t *prop) {
905 if ((con = con_by_window_id(window)) == NULL || con->window == NULL) {
906 DLOG("No such window\n");
911 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
912 false, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 32), NULL);
917 window_update_transient_for(con->window, prop);
923 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
924 * toolwindow (or similar) and to which window it belongs (logical parent).
927 static bool handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
928 xcb_atom_t name, xcb_get_property_reply_t *prop) {
930 if ((con = con_by_window_id(window)) == NULL || con->window == NULL)
934 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
935 false, window, A_WM_CLIENT_LEADER, XCB_ATOM_WINDOW, 0, 32), NULL);
940 window_update_leader(con->window, prop);
946 * Handles FocusIn events which are generated by clients (i3’s focus changes
947 * don’t generate FocusIn events due to a different EventMask) and updates the
948 * decorations accordingly.
951 static void handle_focus_in(xcb_focus_in_event_t *event) {
952 DLOG("focus change in, for window 0x%08x\n", event->event);
954 if ((con = con_by_window_id(event->event)) == NULL || con->window == NULL)
956 DLOG("That is con %p / %s\n", con, con->name);
958 if (event->mode == XCB_NOTIFY_MODE_GRAB ||
959 event->mode == XCB_NOTIFY_MODE_UNGRAB) {
960 DLOG("FocusIn event for grab/ungrab, ignoring\n");
964 if (event->detail == XCB_NOTIFY_DETAIL_POINTER) {
965 DLOG("notify detail is pointer, ignoring this event\n");
969 if (focused_id == event->event) {
970 DLOG("focus matches the currently focused window, not doing anything\n");
974 /* Skip dock clients, they cannot get the i3 focus. */
975 if (con->parent->type == CT_DOCKAREA) {
976 DLOG("This is a dock client, not focusing.\n");
980 DLOG("focus is different, updating decorations\n");
982 /* Get the currently focused workspace to check if the focus change also
983 * involves changing workspaces. If so, we need to call workspace_show() to
984 * correctly update state and send the IPC event. */
985 Con *ws = con_get_workspace(con);
986 if (ws != con_get_workspace(focused))
990 /* We update focused_id because we don’t need to set focus again */
991 focused_id = event->event;
992 x_push_changes(croot);
996 /* Returns false if the event could not be processed (e.g. the window could not
997 * be found), true otherwise */
998 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);
1000 struct property_handler_t {
1003 cb_property_handler_t cb;
1006 static struct property_handler_t property_handlers[] = {
1007 { 0, 128, handle_windowname_change },
1008 { 0, UINT_MAX, handle_hints },
1009 { 0, 128, handle_windowname_change_legacy },
1010 { 0, UINT_MAX, handle_normal_hints },
1011 { 0, UINT_MAX, handle_clientleader_change },
1012 { 0, UINT_MAX, handle_transient_for },
1013 { 0, 128, handle_windowrole_change }
1015 #define NUM_HANDLERS (sizeof(property_handlers) / sizeof(struct property_handler_t))
1018 * Sets the appropriate atoms for the property handlers after the atoms were
1022 void property_handlers_init(void) {
1024 sn_monitor_context_new(sndisplay, conn_screen, startup_monitor_event, NULL, NULL);
1026 property_handlers[0].atom = A__NET_WM_NAME;
1027 property_handlers[1].atom = XCB_ATOM_WM_HINTS;
1028 property_handlers[2].atom = XCB_ATOM_WM_NAME;
1029 property_handlers[3].atom = XCB_ATOM_WM_NORMAL_HINTS;
1030 property_handlers[4].atom = A_WM_CLIENT_LEADER;
1031 property_handlers[5].atom = XCB_ATOM_WM_TRANSIENT_FOR;
1032 property_handlers[6].atom = A_WM_WINDOW_ROLE;
1035 static void property_notify(uint8_t state, xcb_window_t window, xcb_atom_t atom) {
1036 struct property_handler_t *handler = NULL;
1037 xcb_get_property_reply_t *propr = NULL;
1039 for (int c = 0; c < sizeof(property_handlers) / sizeof(struct property_handler_t); c++) {
1040 if (property_handlers[c].atom != atom)
1043 handler = &property_handlers[c];
1047 if (handler == NULL) {
1048 //DLOG("Unhandled property notify for atom %d (0x%08x)\n", atom, atom);
1052 if (state != XCB_PROPERTY_DELETE) {
1053 xcb_get_property_cookie_t cookie = xcb_get_property(conn, 0, window, atom, XCB_GET_PROPERTY_TYPE_ANY, 0, handler->long_len);
1054 propr = xcb_get_property_reply(conn, cookie, 0);
1057 /* the handler will free() the reply unless it returns false */
1058 if (!handler->cb(NULL, conn, state, window, atom, propr))
1063 * Takes an xcb_generic_event_t and calls the appropriate handler, based on the
1067 void handle_event(int type, xcb_generic_event_t *event) {
1068 if (randr_base > -1 &&
1069 type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
1070 handle_screen_change(event);
1076 case XCB_KEY_RELEASE:
1077 handle_key_press((xcb_key_press_event_t*)event);
1080 case XCB_BUTTON_PRESS:
1081 handle_button_press((xcb_button_press_event_t*)event);
1084 case XCB_MAP_REQUEST:
1085 handle_map_request((xcb_map_request_event_t*)event);
1088 case XCB_UNMAP_NOTIFY:
1089 handle_unmap_notify_event((xcb_unmap_notify_event_t*)event);
1092 case XCB_DESTROY_NOTIFY:
1093 handle_destroy_notify_event((xcb_destroy_notify_event_t*)event);
1097 handle_expose_event((xcb_expose_event_t*)event);
1100 case XCB_MOTION_NOTIFY:
1101 handle_motion_notify((xcb_motion_notify_event_t*)event);
1104 /* Enter window = user moved his mouse over the window */
1105 case XCB_ENTER_NOTIFY:
1106 handle_enter_notify((xcb_enter_notify_event_t*)event);
1109 /* Client message are sent to the root window. The only interesting
1110 * client message for us is _NET_WM_STATE, we honour
1111 * _NET_WM_STATE_FULLSCREEN and _NET_WM_STATE_DEMANDS_ATTENTION */
1112 case XCB_CLIENT_MESSAGE:
1113 handle_client_message((xcb_client_message_event_t*)event);
1116 /* Configure request = window tried to change size on its own */
1117 case XCB_CONFIGURE_REQUEST:
1118 handle_configure_request((xcb_configure_request_event_t*)event);
1121 /* Mapping notify = keyboard mapping changed (Xmodmap), re-grab bindings */
1122 case XCB_MAPPING_NOTIFY:
1123 handle_mapping_notify((xcb_mapping_notify_event_t*)event);
1127 handle_focus_in((xcb_focus_in_event_t*)event);
1130 case XCB_PROPERTY_NOTIFY: {
1131 xcb_property_notify_event_t *e = (xcb_property_notify_event_t*)event;
1132 last_timestamp = e->time;
1133 property_notify(e->state, e->window, e->atom);
1138 //DLOG("Unhandled event of type %d\n", type);