2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
7 * x.c: Interface to X11, transfers our in-memory state to X11 (see also
8 * render.c). Basically a big state machine.
13 /* Stores the X11 window ID of the currently focused window */
14 xcb_window_t focused_id = XCB_NONE;
16 /* The bottom-to-top window stack of all windows which are managed by i3.
17 * Used for x_get_window_stack(). */
18 static xcb_window_t *btt_stack;
19 static int btt_stack_num;
21 /* Stores coordinates to warp mouse pointer to if set */
25 * Describes the X11 state we may modify (map state, position, window stack).
26 * There is one entry per container. The state represents the current situation
27 * as X11 sees it (with the exception of the order in the state_head CIRCLEQ,
28 * which represents the order that will be pushed to X11, while old_state_head
29 * represents the current order). It will be updated in x_push_changes().
32 typedef struct con_state {
38 /** The con for which this state is. */
41 /* For reparenting, we have a flag (need_reparent) and the X ID of the old
42 * frame this window was in. The latter is necessary because we need to
43 * ignore UnmapNotify events (by changing the window event mask). */
45 xcb_window_t old_frame;
54 CIRCLEQ_ENTRY(con_state) state;
55 CIRCLEQ_ENTRY(con_state) old_state;
58 CIRCLEQ_HEAD(state_head, con_state) state_head =
59 CIRCLEQ_HEAD_INITIALIZER(state_head);
61 CIRCLEQ_HEAD(old_state_head, con_state) old_state_head =
62 CIRCLEQ_HEAD_INITIALIZER(old_state_head);
65 * Returns the container state for the given frame. This function always
66 * returns a container state (otherwise, there is a bug in the code and the
67 * container state of a container for which x_con_init() was not called was
71 static con_state *state_for_frame(xcb_window_t window) {
73 CIRCLEQ_FOREACH(state, &state_head, state)
74 if (state->id == window)
77 /* TODO: better error handling? */
78 ELOG("No state found\n");
84 * Initializes the X11 part for the given container. Called exactly once for
85 * every container from con_new().
88 void x_con_init(Con *con) {
89 /* TODO: maybe create the window when rendering first? we could then even
90 * get the initial geometry right */
95 /* our own frames should not be managed */
96 mask |= XCB_CW_OVERRIDE_REDIRECT;
99 /* see include/xcb.h for the FRAME_EVENT_MASK */
100 mask |= XCB_CW_EVENT_MASK;
101 values[1] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
103 Rect dims = { -15, -15, 10, 10 };
104 con->frame = create_window(conn, dims, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCURSOR_CURSOR_POINTER, false, mask, values);
106 struct con_state *state = scalloc(sizeof(struct con_state));
107 state->id = con->frame;
108 state->mapped = false;
109 state->initial = true;
110 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
111 CIRCLEQ_INSERT_HEAD(&old_state_head, state, old_state);
112 DLOG("adding new state for window id 0x%08x\n", state->id);
116 * Re-initializes the associated X window state for this container. You have
117 * to call this when you assign a client to an empty container to ensure that
118 * its state gets updated correctly.
121 void x_reinit(Con *con) {
122 struct con_state *state;
124 if ((state = state_for_frame(con->frame)) == NULL) {
125 ELOG("window state not found\n");
129 DLOG("resetting state %p to initial\n", state);
130 state->initial = true;
131 state->child_mapped = false;
133 memset(&(state->window_rect), 0, sizeof(Rect));
137 * Reparents the child window of the given container (necessary for sticky
138 * containers). The reparenting happens in the next call of x_push_changes().
141 void x_reparent_child(Con *con, Con *old) {
142 struct con_state *state;
143 if ((state = state_for_frame(con->frame)) == NULL) {
144 ELOG("window state for con not found\n");
148 state->need_reparent = true;
149 state->old_frame = old->frame;
153 * Moves a child window from Container src to Container dest.
156 void x_move_win(Con *src, Con *dest) {
157 struct con_state *state_src, *state_dest;
159 if ((state_src = state_for_frame(src->frame)) == NULL) {
160 ELOG("window state for src not found\n");
164 if ((state_dest = state_for_frame(dest->frame)) == NULL) {
165 ELOG("window state for dest not found\n");
169 state_dest->con = state_src->con;
170 state_src->con = NULL;
172 Rect zero = { 0, 0, 0, 0 };
173 if (memcmp(&(state_dest->window_rect), &(zero), sizeof(Rect)) == 0) {
174 memcpy(&(state_dest->window_rect), &(state_src->window_rect), sizeof(Rect));
175 DLOG("COPYING RECT\n");
180 * Kills the window decoration associated with the given container.
183 void x_con_kill(Con *con) {
186 xcb_destroy_window(conn, con->frame);
187 xcb_free_pixmap(conn, con->pixmap);
188 xcb_free_gc(conn, con->pm_gc);
189 state = state_for_frame(con->frame);
190 CIRCLEQ_REMOVE(&state_head, state, state);
191 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
195 /* Invalidate focused_id to correctly focus new windows with the same ID */
196 focused_id = XCB_NONE;
200 * Returns true if the client supports the given protocol atom (like WM_DELETE_WINDOW)
203 bool window_supports_protocol(xcb_window_t window, xcb_atom_t atom) {
204 xcb_get_property_cookie_t cookie;
205 xcb_icccm_get_wm_protocols_reply_t protocols;
208 cookie = xcb_icccm_get_wm_protocols(conn, window, A_WM_PROTOCOLS);
209 if (xcb_icccm_get_wm_protocols_reply(conn, cookie, &protocols, NULL) != 1)
212 /* Check if the client’s protocols have the requested atom set */
213 for (uint32_t i = 0; i < protocols.atoms_len; i++)
214 if (protocols.atoms[i] == atom)
217 xcb_icccm_get_wm_protocols_reply_wipe(&protocols);
223 * Kills the given X11 window using WM_DELETE_WINDOW (if supported).
226 void x_window_kill(xcb_window_t window, kill_window_t kill_window) {
227 /* if this window does not support WM_DELETE_WINDOW, we kill it the hard way */
228 if (!window_supports_protocol(window, A_WM_DELETE_WINDOW)) {
229 if (kill_window == KILL_WINDOW) {
230 LOG("Killing specific window 0x%08x\n", window);
231 xcb_destroy_window(conn, window);
233 LOG("Killing the X11 client which owns window 0x%08x\n", window);
234 xcb_kill_client(conn, window);
239 /* Every X11 event is 32 bytes long. Therefore, XCB will copy 32 bytes.
240 * In order to properly initialize these bytes, we allocate 32 bytes even
241 * though we only need less for an xcb_configure_notify_event_t */
242 void *event = scalloc(32);
243 xcb_client_message_event_t *ev = event;
245 ev->response_type = XCB_CLIENT_MESSAGE;
247 ev->type = A_WM_PROTOCOLS;
249 ev->data.data32[0] = A_WM_DELETE_WINDOW;
250 ev->data.data32[1] = XCB_CURRENT_TIME;
252 LOG("Sending WM_DELETE to the client\n");
253 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)ev);
259 * Draws the decoration of the given container onto its parent.
262 void x_draw_decoration(Con *con) {
263 Con *parent = con->parent;
264 bool leaf = con_is_leaf(con);
265 /* This code needs to run for:
267 * • non-leaf containers which are in a stacked/tabbed container
269 * It does not need to run for:
270 * • floating containers (they don’t have a decoration)
273 parent->layout != L_STACKED &&
274 parent->layout != L_TABBED) ||
275 con->type == CT_FLOATING_CON)
278 /* Skip containers whose height is 0 (for example empty dockareas) */
279 if (con->rect.height == 0)
282 /* Skip containers whose pixmap has not yet been created (can happen when
283 * decoration rendering happens recursively for a window for which
284 * x_push_node() was not yet called) */
285 if (leaf && con->pixmap == XCB_NONE)
288 /* 1: build deco_params and compare with cache */
289 struct deco_render_params *p = scalloc(sizeof(struct deco_render_params));
291 /* find out which colors to use */
293 p->color = &config.client.urgent;
294 else if (con == focused || con_inside_focused(con))
295 p->color = &config.client.focused;
296 else if (con == TAILQ_FIRST(&(parent->focus_head)))
297 p->color = &config.client.focused_inactive;
299 p->color = &config.client.unfocused;
301 p->border_style = con_border_style(con);
303 Rect *r = &(con->rect);
304 Rect *w = &(con->window_rect);
305 p->con_rect = (struct width_height){ r->width, r->height };
306 p->con_window_rect = (struct width_height){ w->width, w->height };
307 p->con_deco_rect = con->deco_rect;
308 p->background = config.client.background;
309 p->con_is_leaf = con_is_leaf(con);
310 p->font = config.font.id;
312 if (con->deco_render_params != NULL &&
313 (con->window == NULL || !con->window->name_x_changed) &&
314 !parent->pixmap_recreated &&
315 !con->pixmap_recreated &&
316 memcmp(p, con->deco_render_params, sizeof(struct deco_render_params)) == 0) {
322 while ((next = TAILQ_NEXT(next, nodes))) {
323 FREE(next->deco_render_params);
326 FREE(con->deco_render_params);
327 con->deco_render_params = p;
329 if (con->window != NULL && con->window->name_x_changed)
330 con->window->name_x_changed = false;
332 parent->pixmap_recreated = false;
333 con->pixmap_recreated = false;
335 /* 2: draw the client.background, but only for the parts around the client_rect */
336 if (con->window != NULL) {
337 xcb_rectangle_t background[] = {
339 { 0, 0, r->width, w->y },
341 { 0, (w->y + w->height), r->width, r->height - (w->y + w->height) },
343 { 0, 0, w->x, r->height },
345 { w->x + w->width, 0, r->width - (w->x + w->width), r->height }
348 for (int i = 0; i < 4; i++)
349 DLOG("rect is (%d, %d) with %d x %d\n",
357 xcb_change_gc_single(conn, con->pm_gc, XCB_GC_FOREGROUND, config.client.background);
358 xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, sizeof(background) / sizeof(xcb_rectangle_t), background);
361 /* 3: draw a rectangle in border color around the client */
362 if (p->border_style != BS_NONE && p->con_is_leaf) {
363 Rect br = con_border_style_rect(con);
365 DLOG("con->rect spans %d x %d\n", con->rect.width, con->rect.height);
366 DLOG("border_rect spans (%d, %d) with %d x %d\n", br.x, br.y, br.width, br.height);
367 DLOG("window_rect spans (%d, %d) with %d x %d\n", con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
370 /* These rectangles represents the border around the child window
371 * (left, bottom and right part). We don’t just fill the whole
372 * rectangle because some childs are not freely resizable and we want
373 * their background color to "shine through". */
374 xcb_change_gc_single(conn, con->pm_gc, XCB_GC_FOREGROUND, p->color->background);
375 xcb_rectangle_t borders[] = {
376 { 0, 0, br.x, r->height },
377 { 0, r->height + br.height + br.y, r->width, r->height },
378 { r->width + br.width + br.x, 0, r->width, r->height }
380 xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, 3, borders);
381 /* 1pixel border needs an additional line at the top */
382 if (p->border_style == BS_1PIXEL) {
383 xcb_rectangle_t topline = { br.x, 0, con->rect.width + br.width + br.x, br.y };
384 xcb_poly_fill_rectangle(conn, con->pixmap, con->pm_gc, 1, &topline);
388 /* if this is a borderless/1pixel window, we don’t * need to render the
390 if (p->border_style != BS_NORMAL)
393 /* 4: paint the bar */
394 xcb_change_gc_single(conn, parent->pm_gc, XCB_GC_FOREGROUND, p->color->background);
395 xcb_rectangle_t drect = { con->deco_rect.x, con->deco_rect.y, con->deco_rect.width, con->deco_rect.height };
396 xcb_poly_fill_rectangle(conn, parent->pixmap, parent->pm_gc, 1, &drect);
398 /* 5: draw two unconnected lines in border color */
399 xcb_change_gc_single(conn, parent->pm_gc, XCB_GC_FOREGROUND, p->color->border);
400 Rect *dr = &(con->deco_rect);
401 xcb_segment_t segments[] = {
403 dr->x + dr->width - 1, dr->y },
405 { dr->x + 2, dr->y + dr->height - 1,
406 dr->x + dr->width - 3, dr->y + dr->height - 1 }
408 xcb_poly_segment(conn, parent->pixmap, parent->pm_gc, 2, segments);
410 /* 6: draw the title */
411 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
412 uint32_t values[] = { p->color->text, p->color->background, config.font.id };
413 xcb_change_gc(conn, parent->pm_gc, mask, values);
414 int text_offset_y = config.font.height + (con->deco_rect.height - config.font.height) / 2 - 1;
416 struct Window *win = con->window;
417 if (win == NULL || win->name_x == NULL) {
418 /* this is a non-leaf container, we need to make up a good description */
419 // TODO: use a good description instead of just "another container"
422 strlen("another container"),
425 con->deco_rect.x + 2,
426 con->deco_rect.y + text_offset_y,
433 int indent_level = 0,
435 Con *il_parent = parent;
436 if (il_parent->layout != L_STACKED) {
438 //DLOG("il_parent = %p, layout = %d\n", il_parent, il_parent->layout);
439 if (il_parent->layout == L_STACKED)
441 if (il_parent->type == CT_WORKSPACE || il_parent->type == CT_DOCKAREA || il_parent->type == CT_OUTPUT)
443 il_parent = il_parent->parent;
447 //DLOG("indent_level = %d, indent_mult = %d\n", indent_level, indent_mult);
448 int indent_px = (indent_level * 5) * indent_mult;
450 if (win->uses_net_wm_name)
456 con->deco_rect.x + 2 + indent_px,
457 con->deco_rect.y + text_offset_y,
458 (xcb_char2b_t*)win->name_x
466 con->deco_rect.x + 2 + indent_px,
467 con->deco_rect.y + text_offset_y,
472 xcb_copy_area(conn, con->pixmap, con->frame, con->pm_gc, 0, 0, 0, 0, con->rect.width, con->rect.height);
476 * Recursively calls x_draw_decoration. This cannot be done in x_push_node
477 * because x_push_node uses focus order to recurse (see the comment above)
478 * while drawing the decoration needs to happen in the actual order.
481 void x_deco_recurse(Con *con) {
483 bool leaf = TAILQ_EMPTY(&(con->nodes_head)) &&
484 TAILQ_EMPTY(&(con->floating_head));
485 con_state *state = state_for_frame(con->frame);
488 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
489 x_deco_recurse(current);
491 TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
492 x_deco_recurse(current);
495 xcb_copy_area(conn, con->pixmap, con->frame, con->pm_gc, 0, 0, 0, 0, con->rect.width, con->rect.height);
498 if ((con->type != CT_ROOT && con->type != CT_OUTPUT) &&
499 (!leaf || con->mapped))
500 x_draw_decoration(con);
504 * This function pushes the properties of each node of the layout tree to
505 * X11 if they have changed (like the map state, position of the window, …).
506 * It recursively traverses all children of the given node.
509 void x_push_node(Con *con) {
512 Rect rect = con->rect;
514 //DLOG("Pushing changes for node %p / %s\n", con, con->name);
515 state = state_for_frame(con->frame);
517 if (state->name != NULL) {
518 DLOG("pushing name %s for con %p\n", state->name, con);
520 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->frame,
521 XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, strlen(state->name), state->name);
525 if (con->window == NULL) {
526 /* Calculate the height of all window decorations which will be drawn on to
528 uint32_t max_y = 0, max_height = 0;
529 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
530 Rect *dr = &(current->deco_rect);
531 if (dr->y >= max_y && dr->height >= max_height) {
533 max_height = dr->height;
536 rect.height = max_y + max_height;
537 if (rect.height == 0)
541 /* reparent the child window (when the window was moved due to a sticky
543 if (state->need_reparent && con->window != NULL) {
544 DLOG("Reparenting child window\n");
546 /* Temporarily set the event masks to XCB_NONE so that we won’t get
547 * UnmapNotify events (otherwise the handler would close the container).
548 * These events are generated automatically when reparenting. */
549 uint32_t values[] = { XCB_NONE };
550 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
551 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
553 xcb_reparent_window(conn, con->window->id, con->frame, 0, 0);
555 values[0] = FRAME_EVENT_MASK;
556 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
557 values[0] = CHILD_EVENT_MASK;
558 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
560 state->old_frame = XCB_NONE;
561 state->need_reparent = false;
564 DLOG("ignore_unmap for reparenting of con %p (win 0x%08x) is now %d\n",
565 con, con->window->id, con->ignore_unmap);
568 bool fake_notify = false;
569 /* Set new position if rect changed (and if height > 0) */
570 if (memcmp(&(state->rect), &rect, sizeof(Rect)) != 0 &&
572 /* We first create the new pixmap, then render to it, set it as the
573 * background and only afterwards change the window size. This reduces
576 /* As the pixmap only depends on the size and not on the position, it
577 * is enough to check if width/height have changed. Also, we don’t
578 * create a pixmap at all when the window is actually not visible
580 if ((state->rect.width != rect.width ||
581 state->rect.height != rect.height)) {
582 if (con->pixmap == 0) {
583 con->pixmap = xcb_generate_id(conn);
584 con->pm_gc = xcb_generate_id(conn);
586 xcb_free_pixmap(conn, con->pixmap);
587 xcb_free_gc(conn, con->pm_gc);
589 xcb_create_pixmap(conn, root_depth, con->pixmap, con->frame, rect.width, rect.height);
590 /* For the graphics context, we disable GraphicsExposure events.
591 * Those will be sent when a CopyArea request cannot be fulfilled
592 * properly due to parts of the source being unmapped or otherwise
593 * unavailable. Since we always copy from pixmaps to windows, this
594 * is not a concern for us. */
595 uint32_t values[] = { 0 };
596 xcb_create_gc(conn, con->pm_gc, con->pixmap, XCB_GC_GRAPHICS_EXPOSURES, values);
598 con->pixmap_recreated = true;
600 /* Don’t render the decoration for windows inside a stack which are
601 * not visible right now */
603 con->parent->layout != L_STACKED ||
604 TAILQ_FIRST(&(con->parent->focus_head)) == con)
605 /* Render the decoration now to make the correct decoration visible
606 * from the very first moment. Later calls will be cached, so this
607 * doesn’t hurt performance. */
611 DLOG("setting rect (%d, %d, %d, %d)\n", rect.x, rect.y, rect.width, rect.height);
612 /* flush to ensure that the following commands are sent in a single
613 * buffer and will be processed directly afterwards (the contents of a
614 * window get lost when resizing it, therefore we want to provide it as
615 * fast as possible) */
617 xcb_set_window_rect(conn, con->frame, rect);
618 if (con->pixmap != XCB_NONE)
619 xcb_copy_area(conn, con->pixmap, con->frame, con->pm_gc, 0, 0, 0, 0, con->rect.width, con->rect.height);
622 memcpy(&(state->rect), &rect, sizeof(Rect));
626 /* dito, but for child windows */
627 if (con->window != NULL &&
628 memcmp(&(state->window_rect), &(con->window_rect), sizeof(Rect)) != 0) {
629 DLOG("setting window rect (%d, %d, %d, %d)\n",
630 con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
631 xcb_set_window_rect(conn, con->window->id, con->window_rect);
632 memcpy(&(state->window_rect), &(con->window_rect), sizeof(Rect));
636 /* Map if map state changed, also ensure that the child window
637 * is changed if we are mapped *and* in initial state (meaning the
638 * container was empty before, but now got a child). Unmaps are handled in
639 * x_push_node_unmaps(). */
640 if ((state->mapped != con->mapped || (con->mapped && state->initial)) &&
642 xcb_void_cookie_t cookie;
644 if (con->window != NULL) {
645 /* Set WM_STATE_NORMAL because GTK applications don’t want to
646 * drag & drop if we don’t. Also, xprop(1) needs it. */
647 long data[] = { XCB_ICCCM_WM_STATE_NORMAL, XCB_NONE };
648 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
649 A_WM_STATE, A_WM_STATE, 32, 2, data);
653 if (!state->child_mapped && con->window != NULL) {
654 cookie = xcb_map_window(conn, con->window->id);
656 /* We are interested in EnterNotifys as soon as the window is
658 values[0] = CHILD_EVENT_MASK;
659 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
660 DLOG("mapping child window (serial %d)\n", cookie.sequence);
661 state->child_mapped = true;
664 cookie = xcb_map_window(conn, con->frame);
666 values[0] = FRAME_EVENT_MASK;
667 xcb_change_window_attributes(conn, con->frame, XCB_CW_EVENT_MASK, values);
669 /* copy the pixmap contents to the frame window immediately after mapping */
670 if (con->pixmap != XCB_NONE)
671 xcb_copy_area(conn, con->pixmap, con->frame, con->pm_gc, 0, 0, 0, 0, con->rect.width, con->rect.height);
674 DLOG("mapping container %08x (serial %d)\n", con->frame, cookie.sequence);
675 state->mapped = con->mapped;
678 state->unmap_now = (state->mapped != con->mapped) && !con->mapped;
681 DLOG("Sending fake configure notify\n");
682 fake_absolute_configure_notify(con);
685 /* Handle all children and floating windows of this node. We recurse
686 * in focus order to display the focused client in a stack first when
687 * switching workspaces (reduces flickering). */
688 TAILQ_FOREACH(current, &(con->focus_head), focused)
689 x_push_node(current);
693 * Same idea as in x_push_node(), but this function only unmaps windows. It is
694 * necessary to split this up to handle new fullscreen clients properly: The
695 * new window needs to be mapped and focus needs to be set *before* the
696 * underlying windows are unmapped. Otherwise, focus will revert to the
697 * PointerRoot and will then be set to the new window, generating unnecessary
698 * FocusIn/FocusOut events.
701 static void x_push_node_unmaps(Con *con) {
705 //DLOG("Pushing changes (with unmaps) for node %p / %s\n", con, con->name);
706 state = state_for_frame(con->frame);
708 /* map/unmap if map state changed, also ensure that the child window
709 * is changed if we are mapped *and* in initial state (meaning the
710 * container was empty before, but now got a child) */
711 if (state->unmap_now) {
712 xcb_void_cookie_t cookie;
713 if (con->window != NULL) {
714 /* Set WM_STATE_WITHDRAWN, it seems like Java apps need it */
715 long data[] = { XCB_ICCCM_WM_STATE_WITHDRAWN, XCB_NONE };
716 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
717 A_WM_STATE, A_WM_STATE, 32, 2, data);
720 cookie = xcb_unmap_window(conn, con->frame);
721 DLOG("unmapping container (serial %d)\n", cookie.sequence);
722 /* we need to increase ignore_unmap for this container (if it
723 * contains a window) and for every window "under" this one which
724 * contains a window */
725 if (con->window != NULL) {
727 DLOG("ignore_unmap for con %p (frame 0x%08x) now %d\n", con, con->frame, con->ignore_unmap);
729 state->mapped = con->mapped;
732 /* handle all children and floating windows of this node */
733 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
734 x_push_node_unmaps(current);
736 TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
737 x_push_node_unmaps(current);
741 * Pushes all changes (state of each node, see x_push_node() and the window
744 * NOTE: We need to push the stack first so that the windows have the correct
745 * stacking order. This is relevant for workspace switching where we map the
746 * windows because mapping may generate EnterNotify events. When they are
747 * generated in the wrong order, this will cause focus problems when switching
751 void x_push_changes(Con *con) {
753 xcb_query_pointer_cookie_t pointercookie;
755 /* If we need to warp later, we request the pointer position as soon as possible */
757 pointercookie = xcb_query_pointer(conn, root);
760 DLOG("-- PUSHING WINDOW STACK --\n");
761 //DLOG("Disabling EnterNotify\n");
762 uint32_t values[1] = { XCB_NONE };
763 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
765 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
767 //DLOG("Done, EnterNotify disabled\n");
768 bool order_changed = false;
769 bool stacking_changed = false;
771 /* count first, necessary to (re)allocate memory for the bottom-to-top
772 * stack afterwards */
774 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state)
775 if (state->con && state->con->window)
778 if (cnt != btt_stack_num) {
779 btt_stack = srealloc(btt_stack, sizeof(xcb_window_t) * cnt);
783 xcb_window_t *walk = btt_stack;
785 /* X11 correctly represents the stack if we push it from bottom to top */
786 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
787 if (state->con && state->con->window)
788 memcpy(walk++, &(state->con->window->id), sizeof(xcb_window_t));
790 //DLOG("stack: 0x%08x\n", state->id);
791 con_state *prev = CIRCLEQ_PREV(state, state);
792 con_state *old_prev = CIRCLEQ_PREV(state, old_state);
793 if (prev != old_prev)
794 order_changed = true;
795 if ((state->initial || order_changed) && prev != CIRCLEQ_END(&state_head)) {
796 stacking_changed = true;
797 //DLOG("Stacking 0x%08x above 0x%08x\n", prev->id, state->id);
799 mask |= XCB_CONFIG_WINDOW_SIBLING;
800 mask |= XCB_CONFIG_WINDOW_STACK_MODE;
801 uint32_t values[] = {state->id, XCB_STACK_MODE_ABOVE};
803 xcb_configure_window(conn, prev->id, mask, values);
805 state->initial = false;
808 /* If we re-stacked something (or a new window appeared), we need to update
809 * the _NET_CLIENT_LIST_STACKING hint */
810 if (stacking_changed)
811 ewmh_update_client_list_stacking(btt_stack, btt_stack_num);
813 DLOG("PUSHING CHANGES\n");
816 //DLOG("Re-enabling EnterNotify\n");
817 values[0] = FRAME_EVENT_MASK;
818 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
820 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
822 //DLOG("Done, EnterNotify re-enabled\n");
826 xcb_window_t to_focus = focused->frame;
827 if (focused->window != NULL)
828 to_focus = focused->window->id;
830 if (focused_id != to_focus) {
831 if (!focused->mapped) {
832 DLOG("Not updating focus (to %p / %s), focused window is not mapped.\n", focused, focused->name);
833 /* Invalidate focused_id to correctly focus new windows with the same ID */
834 focused_id = XCB_NONE;
836 DLOG("Updating focus (focused: %p / %s)\n", focused, focused->name);
837 /* We remove XCB_EVENT_MASK_FOCUS_CHANGE from the event mask to get
838 * no focus change events for our own focus changes. We only want
839 * these generated by the clients. */
840 if (focused->window != NULL) {
841 values[0] = CHILD_EVENT_MASK & ~(XCB_EVENT_MASK_FOCUS_CHANGE);
842 xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values);
844 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, to_focus, XCB_CURRENT_TIME);
845 if (focused->window != NULL) {
846 values[0] = CHILD_EVENT_MASK;
847 xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values);
850 if (focused->window != NULL &&
851 focused->window->needs_take_focus) {
852 send_take_focus(to_focus);
855 ewmh_update_active_window(to_focus);
856 focused_id = to_focus;
860 if (focused_id == XCB_NONE) {
861 DLOG("Still no window focused, better set focus to the root window\n");
862 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, root, XCB_CURRENT_TIME);
867 xcb_query_pointer_reply_t *pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL);
869 ELOG("Could not query pointer position, not warping pointer\n");
871 int mid_x = warp_to->x + (warp_to->width / 2);
872 int mid_y = warp_to->y + (warp_to->height / 2);
874 Output *current = get_output_containing(pointerreply->root_x, pointerreply->root_y);
875 Output *target = get_output_containing(mid_x, mid_y);
876 if (current != target)
877 xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0, mid_x, mid_y);
883 DLOG("ENDING CHANGES\n");
885 /* Disable EnterWindow events for windows which will be unmapped in
886 * x_push_node_unmaps() now. Unmapping windows happens when switching
887 * workspaces. We want to avoid getting EnterNotifies during that phase
888 * because they would screw up our focus. One of these cases is having a
889 * stack with two windows. If the first window is focused and gets
890 * unmapped, the second one appears under the cursor and therefore gets an
891 * EnterNotify event. */
892 values[0] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
893 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
894 if (!state->unmap_now)
896 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
899 /* Push all pending unmaps */
900 x_push_node_unmaps(con);
902 /* save the current stack as old stack */
903 CIRCLEQ_FOREACH(state, &state_head, state) {
904 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
905 CIRCLEQ_INSERT_TAIL(&old_state_head, state, old_state);
907 //CIRCLEQ_FOREACH(state, &old_state_head, old_state) {
908 // DLOG("old stack: 0x%08x\n", state->id);
915 * Raises the specified container in the internal stack of X windows. The
916 * next call to x_push_changes() will make the change visible in X11.
919 void x_raise_con(Con *con) {
921 state = state_for_frame(con->frame);
922 //DLOG("raising in new stack: %p / %s / %s / xid %08x\n", con, con->name, con->window ? con->window->name_json : "", state->id);
924 CIRCLEQ_REMOVE(&state_head, state, state);
925 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
929 * Sets the WM_NAME property (so, no UTF8, but used only for debugging anyways)
930 * of the given name. Used for properly tagging the windows for easily spotting
931 * i3 windows in xwininfo -root -all.
934 void x_set_name(Con *con, const char *name) {
935 struct con_state *state;
937 if ((state = state_for_frame(con->frame)) == NULL) {
938 ELOG("window state not found\n");
943 state->name = sstrdup(name);
947 * Sets up i3 specific atoms (I3_SOCKET_PATH and I3_CONFIG_PATH)
950 void x_set_i3_atoms() {
951 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_SOCKET_PATH, A_UTF8_STRING, 8,
952 (current_socketpath == NULL ? 0 : strlen(current_socketpath)),
954 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_CONFIG_PATH, A_UTF8_STRING, 8,
955 strlen(current_configpath), current_configpath);
959 * Set warp_to coordinates. This will trigger on the next call to
963 void x_set_warp_to(Rect *rect)