2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009 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.
14 #define MAX(x, y) ((x) > (y) ? (x) : (y))
17 xcb_window_t ewmh_window;
19 /* Stores the X11 window ID of the currently focused window */
20 xcb_window_t focused_id = XCB_NONE;
22 /* Because 'focused_id' might be reset to force input focus, we separately keep
23 * track of the X11 window ID to be able to always tell whether the focused
24 * window actually changed. */
25 static xcb_window_t last_focused = XCB_NONE;
27 /* Stores coordinates to warp mouse pointer to if set */
31 * Describes the X11 state we may modify (map state, position, window stack).
32 * There is one entry per container. The state represents the current situation
33 * as X11 sees it (with the exception of the order in the state_head CIRCLEQ,
34 * which represents the order that will be pushed to X11, while old_state_head
35 * represents the current order). It will be updated in x_push_changes().
38 typedef struct con_state {
45 /* The con for which this state is. */
48 /* For reparenting, we have a flag (need_reparent) and the X ID of the old
49 * frame this window was in. The latter is necessary because we need to
50 * ignore UnmapNotify events (by changing the window event mask). */
52 xcb_window_t old_frame;
61 CIRCLEQ_ENTRY(con_state)
64 CIRCLEQ_ENTRY(con_state)
67 TAILQ_ENTRY(con_state)
68 initial_mapping_order;
71 CIRCLEQ_HEAD(state_head, con_state)
73 CIRCLEQ_HEAD_INITIALIZER(state_head);
75 CIRCLEQ_HEAD(old_state_head, con_state)
77 CIRCLEQ_HEAD_INITIALIZER(old_state_head);
79 TAILQ_HEAD(initial_mapping_head, con_state)
80 initial_mapping_head =
81 TAILQ_HEAD_INITIALIZER(initial_mapping_head);
84 * Returns the container state for the given frame. This function always
85 * returns a container state (otherwise, there is a bug in the code and the
86 * container state of a container for which x_con_init() was not called was
90 static con_state *state_for_frame(xcb_window_t window) {
92 CIRCLEQ_FOREACH(state, &state_head, state)
93 if (state->id == window)
96 /* TODO: better error handling? */
97 ELOG("No state found\n");
103 * Changes the atoms on the root window and the windows themselves to properly
104 * reflect the current focus for ewmh compliance.
107 static void change_ewmh_focus(xcb_window_t new_focus, xcb_window_t old_focus) {
108 if (new_focus == old_focus) {
112 ewmh_update_active_window(new_focus);
114 if (new_focus != XCB_WINDOW_NONE) {
115 ewmh_update_focused(new_focus, true);
118 if (old_focus != XCB_WINDOW_NONE) {
119 ewmh_update_focused(old_focus, false);
124 * Initializes the X11 part for the given container. Called exactly once for
125 * every container from con_new().
128 void x_con_init(Con *con) {
129 /* TODO: maybe create the window when rendering first? we could then even
130 * get the initial geometry right */
135 xcb_visualid_t visual = get_visualid_by_depth(con->depth);
136 xcb_colormap_t win_colormap;
137 if (con->depth != root_depth) {
138 /* We need to create a custom colormap. */
139 win_colormap = xcb_generate_id(conn);
140 xcb_create_colormap(conn, XCB_COLORMAP_ALLOC_NONE, win_colormap, root, visual);
141 con->colormap = win_colormap;
143 /* Use the default colormap. */
144 win_colormap = colormap;
145 con->colormap = XCB_NONE;
148 /* We explicitly set a background color and border color (even though we
149 * don’t even have a border) because the X11 server requires us to when
150 * using 32 bit color depths, see
151 * https://stackoverflow.com/questions/3645632 */
152 mask |= XCB_CW_BACK_PIXEL;
153 values[0] = root_screen->black_pixel;
155 mask |= XCB_CW_BORDER_PIXEL;
156 values[1] = root_screen->black_pixel;
158 /* our own frames should not be managed */
159 mask |= XCB_CW_OVERRIDE_REDIRECT;
162 /* see include/xcb.h for the FRAME_EVENT_MASK */
163 mask |= XCB_CW_EVENT_MASK;
164 values[3] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
166 mask |= XCB_CW_COLORMAP;
167 values[4] = win_colormap;
169 Rect dims = {-15, -15, 10, 10};
170 xcb_window_t frame_id = create_window(conn, dims, con->depth, visual, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCURSOR_CURSOR_POINTER, false, mask, values);
171 draw_util_surface_init(conn, &(con->frame), frame_id, get_visualtype_by_id(visual), dims.width, dims.height);
172 xcb_change_property(conn,
173 XCB_PROP_MODE_REPLACE,
178 (strlen("i3-frame") + 1) * 2,
179 "i3-frame\0i3-frame\0");
181 struct con_state *state = scalloc(1, sizeof(struct con_state));
182 state->id = con->frame.id;
183 state->mapped = false;
184 state->initial = true;
185 DLOG("Adding window 0x%08x to lists\n", state->id);
186 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
187 CIRCLEQ_INSERT_HEAD(&old_state_head, state, old_state);
188 TAILQ_INSERT_TAIL(&initial_mapping_head, state, initial_mapping_order);
189 DLOG("adding new state for window id 0x%08x\n", state->id);
193 * Re-initializes the associated X window state for this container. You have
194 * to call this when you assign a client to an empty container to ensure that
195 * its state gets updated correctly.
198 void x_reinit(Con *con) {
199 struct con_state *state;
201 if ((state = state_for_frame(con->frame.id)) == NULL) {
202 ELOG("window state not found\n");
206 DLOG("resetting state %p to initial\n", state);
207 state->initial = true;
208 state->child_mapped = false;
210 memset(&(state->window_rect), 0, sizeof(Rect));
214 * Reparents the child window of the given container (necessary for sticky
215 * containers). The reparenting happens in the next call of x_push_changes().
218 void x_reparent_child(Con *con, Con *old) {
219 struct con_state *state;
220 if ((state = state_for_frame(con->frame.id)) == NULL) {
221 ELOG("window state for con not found\n");
225 state->need_reparent = true;
226 state->old_frame = old->frame.id;
230 * Moves a child window from Container src to Container dest.
233 void x_move_win(Con *src, Con *dest) {
234 struct con_state *state_src, *state_dest;
236 if ((state_src = state_for_frame(src->frame.id)) == NULL) {
237 ELOG("window state for src not found\n");
241 if ((state_dest = state_for_frame(dest->frame.id)) == NULL) {
242 ELOG("window state for dest not found\n");
246 state_dest->con = state_src->con;
247 state_src->con = NULL;
249 Rect zero = {0, 0, 0, 0};
250 if (memcmp(&(state_dest->window_rect), &(zero), sizeof(Rect)) == 0) {
251 memcpy(&(state_dest->window_rect), &(state_src->window_rect), sizeof(Rect));
252 DLOG("COPYING RECT\n");
256 static void _x_con_kill(Con *con) {
259 if (con->colormap != XCB_NONE) {
260 xcb_free_colormap(conn, con->colormap);
263 draw_util_surface_free(conn, &(con->frame));
264 draw_util_surface_free(conn, &(con->frame_buffer));
265 xcb_free_pixmap(conn, con->frame_buffer.id);
266 state = state_for_frame(con->frame.id);
267 CIRCLEQ_REMOVE(&state_head, state, state);
268 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
269 TAILQ_REMOVE(&initial_mapping_head, state, initial_mapping_order);
273 /* Invalidate focused_id to correctly focus new windows with the same ID */
274 focused_id = last_focused = XCB_NONE;
278 * Kills the window decoration associated with the given container.
281 void x_con_kill(Con *con) {
283 xcb_destroy_window(conn, con->frame.id);
287 * Completely reinitializes the container's frame, without destroying the old window.
290 void x_con_reframe(Con *con) {
296 * Returns true if the client supports the given protocol atom (like WM_DELETE_WINDOW)
299 bool window_supports_protocol(xcb_window_t window, xcb_atom_t atom) {
300 xcb_get_property_cookie_t cookie;
301 xcb_icccm_get_wm_protocols_reply_t protocols;
304 cookie = xcb_icccm_get_wm_protocols(conn, window, A_WM_PROTOCOLS);
305 if (xcb_icccm_get_wm_protocols_reply(conn, cookie, &protocols, NULL) != 1)
308 /* Check if the client’s protocols have the requested atom set */
309 for (uint32_t i = 0; i < protocols.atoms_len; i++)
310 if (protocols.atoms[i] == atom)
313 xcb_icccm_get_wm_protocols_reply_wipe(&protocols);
319 * Kills the given X11 window using WM_DELETE_WINDOW (if supported).
322 void x_window_kill(xcb_window_t window, kill_window_t kill_window) {
323 /* if this window does not support WM_DELETE_WINDOW, we kill it the hard way */
324 if (!window_supports_protocol(window, A_WM_DELETE_WINDOW)) {
325 if (kill_window == KILL_WINDOW) {
326 LOG("Killing specific window 0x%08x\n", window);
327 xcb_destroy_window(conn, window);
329 LOG("Killing the X11 client which owns window 0x%08x\n", window);
330 xcb_kill_client(conn, window);
335 /* Every X11 event is 32 bytes long. Therefore, XCB will copy 32 bytes.
336 * In order to properly initialize these bytes, we allocate 32 bytes even
337 * though we only need less for an xcb_configure_notify_event_t */
338 void *event = scalloc(32, 1);
339 xcb_client_message_event_t *ev = event;
341 ev->response_type = XCB_CLIENT_MESSAGE;
343 ev->type = A_WM_PROTOCOLS;
345 ev->data.data32[0] = A_WM_DELETE_WINDOW;
346 ev->data.data32[1] = XCB_CURRENT_TIME;
348 LOG("Sending WM_DELETE to the client\n");
349 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char *)ev);
354 static void x_draw_title_border(Con *con, struct deco_render_params *p) {
355 assert(con->parent != NULL);
357 Rect *dr = &(con->deco_rect);
358 adjacent_t borders_to_hide = con_adjacent_borders(con) & config.hide_edge_borders;
359 int deco_diff_l = borders_to_hide & ADJ_LEFT_SCREEN_EDGE ? 0 : con->current_border_width;
360 int deco_diff_r = borders_to_hide & ADJ_RIGHT_SCREEN_EDGE ? 0 : con->current_border_width;
361 if (con->parent->layout == L_TABBED ||
362 (con->parent->layout == L_STACKED && TAILQ_NEXT(con, nodes) != NULL)) {
367 draw_util_rectangle(&(con->parent->frame_buffer), p->color->border,
368 dr->x, dr->y, dr->width, 1);
370 draw_util_rectangle(&(con->parent->frame_buffer), p->color->border,
371 dr->x + deco_diff_l, dr->y + dr->height - 1, dr->width - (deco_diff_l + deco_diff_r), 1);
374 static void x_draw_decoration_after_title(Con *con, struct deco_render_params *p) {
375 assert(con->parent != NULL);
377 Rect *dr = &(con->deco_rect);
379 /* Redraw the right border to cut off any text that went past it.
380 * This is necessary when the text was drawn using XCB since cutting text off
381 * automatically does not work there. For pango rendering, this isn't necessary. */
382 if (!font_is_pango()) {
383 /* We actually only redraw the far right two pixels as that is the
384 * distance we keep from the edge (not the entire border width).
385 * Redrawing the entire border would cause text to be cut off. */
386 draw_util_rectangle(&(con->parent->frame_buffer), p->color->background,
387 dr->x + dr->width - 2 * logical_px(1),
393 /* Draw a 1px separator line before and after every tab, so that tabs can
394 * be easily distinguished. */
395 if (con->parent->layout == L_TABBED) {
397 draw_util_rectangle(&(con->parent->frame_buffer), p->color->border,
398 dr->x, dr->y, 1, dr->height);
401 draw_util_rectangle(&(con->parent->frame_buffer), p->color->border,
402 dr->x + dr->width - 1, dr->y, 1, dr->height);
405 /* Redraw the border. */
406 x_draw_title_border(con, p);
410 * Draws the decoration of the given container onto its parent.
413 void x_draw_decoration(Con *con) {
414 Con *parent = con->parent;
415 bool leaf = con_is_leaf(con);
417 /* This code needs to run for:
419 * • non-leaf containers which are in a stacked/tabbed container
421 * It does not need to run for:
422 * • direct children of outputs or dockareas
423 * • floating containers (they don’t have a decoration)
426 parent->layout != L_STACKED &&
427 parent->layout != L_TABBED) ||
428 parent->type == CT_OUTPUT ||
429 parent->type == CT_DOCKAREA ||
430 con->type == CT_FLOATING_CON)
433 /* Skip containers whose height is 0 (for example empty dockareas) */
434 if (con->rect.height == 0)
437 /* Skip containers whose pixmap has not yet been created (can happen when
438 * decoration rendering happens recursively for a window for which
439 * x_push_node() was not yet called) */
440 if (leaf && con->frame_buffer.id == XCB_NONE)
443 /* 1: build deco_params and compare with cache */
444 struct deco_render_params *p = scalloc(1, sizeof(struct deco_render_params));
446 /* find out which colors to use */
448 p->color = &config.client.urgent;
449 else if (con == focused || con_inside_focused(con))
450 p->color = &config.client.focused;
451 else if (con == TAILQ_FIRST(&(parent->focus_head)))
452 p->color = &config.client.focused_inactive;
454 p->color = &config.client.unfocused;
456 p->border_style = con_border_style(con);
458 Rect *r = &(con->rect);
459 Rect *w = &(con->window_rect);
460 p->con_rect = (struct width_height){r->width, r->height};
461 p->con_window_rect = (struct width_height){w->width, w->height};
462 p->con_deco_rect = con->deco_rect;
463 p->background = config.client.background;
464 p->con_is_leaf = con_is_leaf(con);
465 p->parent_layout = con->parent->layout;
467 if (con->deco_render_params != NULL &&
468 (con->window == NULL || !con->window->name_x_changed) &&
469 !parent->pixmap_recreated &&
470 !con->pixmap_recreated &&
471 !con->mark_changed &&
472 memcmp(p, con->deco_render_params, sizeof(struct deco_render_params)) == 0) {
478 while ((next = TAILQ_NEXT(next, nodes))) {
479 FREE(next->deco_render_params);
482 FREE(con->deco_render_params);
483 con->deco_render_params = p;
485 if (con->window != NULL && con->window->name_x_changed)
486 con->window->name_x_changed = false;
488 parent->pixmap_recreated = false;
489 con->pixmap_recreated = false;
490 con->mark_changed = false;
492 /* 2: draw the client.background, but only for the parts around the window_rect */
493 if (con->window != NULL) {
495 draw_util_rectangle(&(con->frame_buffer), config.client.background,
496 0, 0, r->width, w->y);
498 draw_util_rectangle(&(con->frame_buffer), config.client.background,
499 0, w->y + w->height, r->width, r->height - (w->y + w->height));
501 draw_util_rectangle(&(con->frame_buffer), config.client.background,
502 0, 0, w->x, r->height);
504 draw_util_rectangle(&(con->frame_buffer), config.client.background,
505 w->x + w->width, 0, r->width - (w->x + w->width), r->height);
508 /* 3: draw a rectangle in border color around the client */
509 if (p->border_style != BS_NONE && p->con_is_leaf) {
510 /* We might hide some borders adjacent to the screen-edge */
511 adjacent_t borders_to_hide = con_adjacent_borders(con) & config.hide_edge_borders;
512 Rect br = con_border_style_rect(con);
514 /* These rectangles represent the border around the child window
515 * (left, bottom and right part). We don’t just fill the whole
516 * rectangle because some children are not freely resizable and we want
517 * their background color to "shine through". */
518 if (!(borders_to_hide & ADJ_LEFT_SCREEN_EDGE)) {
519 draw_util_rectangle(&(con->frame_buffer), p->color->child_border, 0, 0, br.x, r->height);
521 if (!(borders_to_hide & ADJ_RIGHT_SCREEN_EDGE)) {
522 draw_util_rectangle(&(con->frame_buffer),
523 p->color->child_border, r->width + (br.width + br.x), 0,
524 -(br.width + br.x), r->height);
526 if (!(borders_to_hide & ADJ_LOWER_SCREEN_EDGE)) {
527 draw_util_rectangle(&(con->frame_buffer),
528 p->color->child_border, br.x, r->height + (br.height + br.y),
529 r->width + br.width, -(br.height + br.y));
531 /* pixel border needs an additional line at the top */
532 if (p->border_style == BS_PIXEL && !(borders_to_hide & ADJ_UPPER_SCREEN_EDGE)) {
533 draw_util_rectangle(&(con->frame_buffer),
534 p->color->child_border, br.x, 0, r->width + br.width, br.y);
537 /* Highlight the side of the border at which the next window will be
538 * opened if we are rendering a single window within a split container
539 * (which is undistinguishable from a single window outside a split
540 * container otherwise. */
541 if (TAILQ_NEXT(con, nodes) == NULL &&
542 TAILQ_PREV(con, nodes_head, nodes) == NULL &&
543 con->parent->type != CT_FLOATING_CON) {
544 if (p->parent_layout == L_SPLITH) {
545 draw_util_rectangle(&(con->frame_buffer), p->color->indicator,
546 r->width + (br.width + br.x), br.y, -(br.width + br.x), r->height + br.height);
547 } else if (p->parent_layout == L_SPLITV) {
548 draw_util_rectangle(&(con->frame_buffer), p->color->indicator,
549 br.x, r->height + (br.height + br.y), r->width + br.width, -(br.height + br.y));
554 /* if this is a borderless/1pixel window, we don’t need to render the
556 if (p->border_style != BS_NORMAL)
559 /* If the parent hasn't been set up yet, skip the decoration rendering
561 if (parent->frame_buffer.id == XCB_NONE)
564 /* For the first child, we clear the parent pixmap to ensure there's no
565 * garbage left on there. This is important to avoid tearing when using
567 if (con == TAILQ_FIRST(&(con->parent->nodes_head))) {
568 draw_util_clear_surface(&(con->parent->frame_buffer), COLOR_TRANSPARENT);
569 FREE(con->parent->deco_render_params);
572 /* 4: paint the bar */
573 draw_util_rectangle(&(parent->frame_buffer), p->color->background,
574 con->deco_rect.x, con->deco_rect.y, con->deco_rect.width, con->deco_rect.height);
576 /* 5: draw two unconnected horizontal lines in border color */
577 x_draw_title_border(con, p);
579 /* 6: draw the title */
580 int text_offset_y = (con->deco_rect.height - config.font.height) / 2;
582 struct Window *win = con->window;
585 if (con->title_format == NULL) {
587 char *tree = con_get_tree_representation(con);
588 sasprintf(&_title, "i3: %s", tree);
591 title = i3string_from_utf8(_title);
594 title = con_parse_title_format(con);
597 draw_util_text(title, &(parent->frame_buffer),
598 p->color->text, p->color->background,
599 con->deco_rect.x + logical_px(2),
600 con->deco_rect.y + text_offset_y,
601 con->deco_rect.width - 2 * logical_px(2));
602 I3STRING_FREE(title);
607 const int title_padding = logical_px(2);
608 const int deco_width = (int)con->deco_rect.width;
610 if (config.show_marks && !TAILQ_EMPTY(&(con->marks_head))) {
611 char *formatted_mark = sstrdup("");
612 bool had_visible_mark = false;
615 TAILQ_FOREACH(mark, &(con->marks_head), marks) {
616 if (mark->name[0] == '_')
618 had_visible_mark = true;
621 sasprintf(&buf, "%s[%s]", formatted_mark, mark->name);
622 free(formatted_mark);
623 formatted_mark = buf;
626 if (had_visible_mark) {
627 i3String *mark = i3string_from_utf8(formatted_mark);
628 mark_width = predict_text_width(mark);
630 int mark_offset_x = (config.title_align == ALIGN_RIGHT)
632 : deco_width - mark_width - title_padding;
634 draw_util_text(mark, &(parent->frame_buffer),
635 p->color->text, p->color->background,
636 con->deco_rect.x + mark_offset_x,
637 con->deco_rect.y + text_offset_y, mark_width);
640 mark_width += title_padding;
643 FREE(formatted_mark);
646 i3String *title = con->title_format == NULL ? win->name : con_parse_title_format(con);
652 switch (config.title_align) {
654 /* (pad)[text ](pad)[mark + its pad) */
655 title_offset_x = title_padding;
658 /* (pad)[ text ](pad)[mark + its pad)
659 * To center the text inside its allocated space, the surface
660 * between the brackets, we use the formula
661 * (surface_width - predict_text_width) / 2
662 * where surface_width = deco_width - 2 * pad - mark_width
663 * so, offset = pad + (surface_width - predict_text_width) / 2 =
664 * = … = (deco_width - mark_width - predict_text_width) / 2 */
665 title_offset_x = max(title_padding, (deco_width - mark_width - predict_text_width(title)) / 2);
668 /* [mark + its pad](pad)[ text](pad) */
669 title_offset_x = max(title_padding + mark_width, deco_width - title_padding - predict_text_width(title));
673 draw_util_text(title, &(parent->frame_buffer),
674 p->color->text, p->color->background,
675 con->deco_rect.x + title_offset_x,
676 con->deco_rect.y + text_offset_y,
677 deco_width - mark_width - 2 * title_padding);
679 if (con->title_format != NULL) {
680 I3STRING_FREE(title);
684 x_draw_decoration_after_title(con, p);
686 draw_util_copy_surface(&(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height);
690 * Recursively calls x_draw_decoration. This cannot be done in x_push_node
691 * because x_push_node uses focus order to recurse (see the comment above)
692 * while drawing the decoration needs to happen in the actual order.
695 void x_deco_recurse(Con *con) {
697 bool leaf = TAILQ_EMPTY(&(con->nodes_head)) &&
698 TAILQ_EMPTY(&(con->floating_head));
699 con_state *state = state_for_frame(con->frame.id);
702 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
703 x_deco_recurse(current);
705 TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
706 x_deco_recurse(current);
709 draw_util_copy_surface(&(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height);
713 if ((con->type != CT_ROOT && con->type != CT_OUTPUT) &&
714 (!leaf || con->mapped))
715 x_draw_decoration(con);
719 * Sets or removes the _NET_WM_STATE_HIDDEN property on con if necessary.
722 static void set_hidden_state(Con *con) {
723 if (con->window == NULL) {
727 con_state *state = state_for_frame(con->frame.id);
728 bool should_be_hidden = con_is_hidden(con);
729 if (should_be_hidden == state->is_hidden)
732 if (should_be_hidden) {
733 DLOG("setting _NET_WM_STATE_HIDDEN for con = %p\n", con);
734 xcb_add_property_atom(conn, con->window->id, A__NET_WM_STATE, A__NET_WM_STATE_HIDDEN);
736 DLOG("removing _NET_WM_STATE_HIDDEN for con = %p\n", con);
737 xcb_remove_property_atom(conn, con->window->id, A__NET_WM_STATE, A__NET_WM_STATE_HIDDEN);
740 state->is_hidden = should_be_hidden;
744 * This function pushes the properties of each node of the layout tree to
745 * X11 if they have changed (like the map state, position of the window, …).
746 * It recursively traverses all children of the given node.
749 void x_push_node(Con *con) {
752 Rect rect = con->rect;
754 //DLOG("Pushing changes for node %p / %s\n", con, con->name);
755 state = state_for_frame(con->frame.id);
757 if (state->name != NULL) {
758 DLOG("pushing name %s for con %p\n", state->name, con);
760 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->frame.id,
761 XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, strlen(state->name), state->name);
765 if (con->window == NULL) {
766 /* Calculate the height of all window decorations which will be drawn on to
768 uint32_t max_y = 0, max_height = 0;
769 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
770 Rect *dr = &(current->deco_rect);
771 if (dr->y >= max_y && dr->height >= max_height) {
773 max_height = dr->height;
776 rect.height = max_y + max_height;
777 if (rect.height == 0)
781 /* reparent the child window (when the window was moved due to a sticky
783 if (state->need_reparent && con->window != NULL) {
784 DLOG("Reparenting child window\n");
786 /* Temporarily set the event masks to XCB_NONE so that we won’t get
787 * UnmapNotify events (otherwise the handler would close the container).
788 * These events are generated automatically when reparenting. */
789 uint32_t values[] = {XCB_NONE};
790 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
791 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
793 xcb_reparent_window(conn, con->window->id, con->frame.id, 0, 0);
795 values[0] = FRAME_EVENT_MASK;
796 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
797 values[0] = CHILD_EVENT_MASK;
798 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
800 state->old_frame = XCB_NONE;
801 state->need_reparent = false;
804 DLOG("ignore_unmap for reparenting of con %p (win 0x%08x) is now %d\n",
805 con, con->window->id, con->ignore_unmap);
808 /* The pixmap of a borderless leaf container will not be used except
809 * for the titlebar in a stack or tabs (issue #1013). */
810 bool is_pixmap_needed = (con->border_style != BS_NONE ||
812 con->parent->layout == L_STACKED ||
813 con->parent->layout == L_TABBED);
815 /* The root con and output cons will never require a pixmap. In particular for the
816 * __i3 output, this will likely not work anyway because it might be ridiculously
817 * large, causing an XCB_ALLOC error. */
818 if (con->type == CT_ROOT || con->type == CT_OUTPUT)
819 is_pixmap_needed = false;
821 bool fake_notify = false;
822 /* Set new position if rect changed (and if height > 0) or if the pixmap
823 * needs to be recreated */
824 if ((is_pixmap_needed && con->frame_buffer.id == XCB_NONE) || (memcmp(&(state->rect), &rect, sizeof(Rect)) != 0 &&
826 /* We first create the new pixmap, then render to it, set it as the
827 * background and only afterwards change the window size. This reduces
830 bool has_rect_changed = (state->rect.x != rect.x || state->rect.y != rect.y ||
831 state->rect.width != rect.width || state->rect.height != rect.height);
833 /* Check if the container has an unneeded pixmap left over from
834 * previously having a border or titlebar. */
835 if (!is_pixmap_needed && con->frame_buffer.id != XCB_NONE) {
836 draw_util_surface_free(conn, &(con->frame_buffer));
837 xcb_free_pixmap(conn, con->frame_buffer.id);
838 con->frame_buffer.id = XCB_NONE;
841 if (is_pixmap_needed && (has_rect_changed || con->frame_buffer.id == XCB_NONE)) {
842 if (con->frame_buffer.id == XCB_NONE) {
843 con->frame_buffer.id = xcb_generate_id(conn);
845 draw_util_surface_free(conn, &(con->frame_buffer));
846 xcb_free_pixmap(conn, con->frame_buffer.id);
849 uint16_t win_depth = root_depth;
851 win_depth = con->window->depth;
853 /* Ensure we have valid dimensions for our surface. */
854 // TODO This is probably a bug in the condition above as we should never enter this path
855 // for height == 0. Also, we should probably handle width == 0 the same way.
856 int width = MAX((int32_t)rect.width, 1);
857 int height = MAX((int32_t)rect.height, 1);
859 xcb_create_pixmap(conn, win_depth, con->frame_buffer.id, con->frame.id, width, height);
860 draw_util_surface_init(conn, &(con->frame_buffer), con->frame_buffer.id,
861 get_visualtype_by_id(get_visualid_by_depth(win_depth)), width, height);
863 /* For the graphics context, we disable GraphicsExposure events.
864 * Those will be sent when a CopyArea request cannot be fulfilled
865 * properly due to parts of the source being unmapped or otherwise
866 * unavailable. Since we always copy from pixmaps to windows, this
867 * is not a concern for us. */
868 xcb_change_gc(conn, con->frame_buffer.gc, XCB_GC_GRAPHICS_EXPOSURES, (uint32_t[]){0});
870 draw_util_surface_set_size(&(con->frame), width, height);
871 con->pixmap_recreated = true;
873 /* Don’t render the decoration for windows inside a stack which are
874 * not visible right now */
875 // TODO Should this work the same way for L_TABBED?
877 con->parent->layout != L_STACKED ||
878 TAILQ_FIRST(&(con->parent->focus_head)) == con)
879 /* Render the decoration now to make the correct decoration visible
880 * from the very first moment. Later calls will be cached, so this
881 * doesn’t hurt performance. */
885 DLOG("setting rect (%d, %d, %d, %d)\n", rect.x, rect.y, rect.width, rect.height);
886 /* flush to ensure that the following commands are sent in a single
887 * buffer and will be processed directly afterwards (the contents of a
888 * window get lost when resizing it, therefore we want to provide it as
889 * fast as possible) */
891 xcb_set_window_rect(conn, con->frame.id, rect);
892 if (con->frame_buffer.id != XCB_NONE) {
893 draw_util_copy_surface(&(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height);
897 memcpy(&(state->rect), &rect, sizeof(Rect));
901 /* dito, but for child windows */
902 if (con->window != NULL &&
903 memcmp(&(state->window_rect), &(con->window_rect), sizeof(Rect)) != 0) {
904 DLOG("setting window rect (%d, %d, %d, %d)\n",
905 con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
906 xcb_set_window_rect(conn, con->window->id, con->window_rect);
907 memcpy(&(state->window_rect), &(con->window_rect), sizeof(Rect));
911 /* Map if map state changed, also ensure that the child window
912 * is changed if we are mapped and there is a new, unmapped child window.
913 * Unmaps are handled in x_push_node_unmaps(). */
914 if ((state->mapped != con->mapped || (con->window != NULL && !state->child_mapped)) &&
916 xcb_void_cookie_t cookie;
918 if (con->window != NULL) {
919 /* Set WM_STATE_NORMAL because GTK applications don’t want to
920 * drag & drop if we don’t. Also, xprop(1) needs it. */
921 long data[] = {XCB_ICCCM_WM_STATE_NORMAL, XCB_NONE};
922 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
923 A_WM_STATE, A_WM_STATE, 32, 2, data);
927 if (!state->child_mapped && con->window != NULL) {
928 cookie = xcb_map_window(conn, con->window->id);
930 /* We are interested in EnterNotifys as soon as the window is
932 values[0] = CHILD_EVENT_MASK;
933 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
934 DLOG("mapping child window (serial %d)\n", cookie.sequence);
935 state->child_mapped = true;
938 cookie = xcb_map_window(conn, con->frame.id);
940 values[0] = FRAME_EVENT_MASK;
941 xcb_change_window_attributes(conn, con->frame.id, XCB_CW_EVENT_MASK, values);
943 /* copy the pixmap contents to the frame window immediately after mapping */
944 if (con->frame_buffer.id != XCB_NONE) {
945 draw_util_copy_surface(&(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height);
949 DLOG("mapping container %08x (serial %d)\n", con->frame.id, cookie.sequence);
950 state->mapped = con->mapped;
953 state->unmap_now = (state->mapped != con->mapped) && !con->mapped;
956 DLOG("Sending fake configure notify\n");
957 fake_absolute_configure_notify(con);
960 set_hidden_state(con);
962 /* Handle all children and floating windows of this node. We recurse
963 * in focus order to display the focused client in a stack first when
964 * switching workspaces (reduces flickering). */
965 TAILQ_FOREACH(current, &(con->focus_head), focused) {
966 x_push_node(current);
971 * Same idea as in x_push_node(), but this function only unmaps windows. It is
972 * necessary to split this up to handle new fullscreen clients properly: The
973 * new window needs to be mapped and focus needs to be set *before* the
974 * underlying windows are unmapped. Otherwise, focus will revert to the
975 * PointerRoot and will then be set to the new window, generating unnecessary
976 * FocusIn/FocusOut events.
979 static void x_push_node_unmaps(Con *con) {
983 //DLOG("Pushing changes (with unmaps) for node %p / %s\n", con, con->name);
984 state = state_for_frame(con->frame.id);
986 /* map/unmap if map state changed, also ensure that the child window
987 * is changed if we are mapped *and* in initial state (meaning the
988 * container was empty before, but now got a child) */
989 if (state->unmap_now) {
990 xcb_void_cookie_t cookie;
991 if (con->window != NULL) {
992 /* Set WM_STATE_WITHDRAWN, it seems like Java apps need it */
993 long data[] = {XCB_ICCCM_WM_STATE_WITHDRAWN, XCB_NONE};
994 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
995 A_WM_STATE, A_WM_STATE, 32, 2, data);
998 cookie = xcb_unmap_window(conn, con->frame.id);
999 DLOG("unmapping container %p / %s (serial %d)\n", con, con->name, cookie.sequence);
1000 /* we need to increase ignore_unmap for this container (if it
1001 * contains a window) and for every window "under" this one which
1002 * contains a window */
1003 if (con->window != NULL) {
1004 con->ignore_unmap++;
1005 DLOG("ignore_unmap for con %p (frame 0x%08x) now %d\n", con, con->frame.id, con->ignore_unmap);
1007 state->mapped = con->mapped;
1010 /* handle all children and floating windows of this node */
1011 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
1012 x_push_node_unmaps(current);
1014 TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
1015 x_push_node_unmaps(current);
1019 * Returns true if the given container is currently attached to its parent.
1021 * TODO: Remove once #1185 has been fixed
1023 static bool is_con_attached(Con *con) {
1024 if (con->parent == NULL)
1028 TAILQ_FOREACH(current, &(con->parent->nodes_head), nodes) {
1037 * Pushes all changes (state of each node, see x_push_node() and the window
1040 * NOTE: We need to push the stack first so that the windows have the correct
1041 * stacking order. This is relevant for workspace switching where we map the
1042 * windows because mapping may generate EnterNotify events. When they are
1043 * generated in the wrong order, this will cause focus problems when switching
1047 void x_push_changes(Con *con) {
1049 xcb_query_pointer_cookie_t pointercookie;
1051 /* If we need to warp later, we request the pointer position as soon as possible */
1053 pointercookie = xcb_query_pointer(conn, root);
1056 DLOG("-- PUSHING WINDOW STACK --\n");
1057 //DLOG("Disabling EnterNotify\n");
1058 /* We need to keep SubstructureRedirect around, otherwise clients can send
1059 * ConfigureWindow requests and get them applied directly instead of having
1060 * them become ConfigureRequests that i3 handles. */
1061 uint32_t values[1] = {XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT};
1062 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1064 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
1066 //DLOG("Done, EnterNotify disabled\n");
1067 bool order_changed = false;
1068 bool stacking_changed = false;
1070 /* count first, necessary to (re)allocate memory for the bottom-to-top
1071 * stack afterwards */
1073 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state)
1074 if (con_has_managed_window(state->con))
1077 /* The bottom-to-top window stack of all windows which are managed by i3.
1078 * Used for x_get_window_stack(). */
1079 static xcb_window_t *client_list_windows = NULL;
1080 static int client_list_count = 0;
1082 if (cnt != client_list_count) {
1083 client_list_windows = srealloc(client_list_windows, sizeof(xcb_window_t) * cnt);
1084 client_list_count = cnt;
1087 xcb_window_t *walk = client_list_windows;
1089 /* X11 correctly represents the stack if we push it from bottom to top */
1090 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1091 if (con_has_managed_window(state->con))
1092 memcpy(walk++, &(state->con->window->id), sizeof(xcb_window_t));
1094 //DLOG("stack: 0x%08x\n", state->id);
1095 con_state *prev = CIRCLEQ_PREV(state, state);
1096 con_state *old_prev = CIRCLEQ_PREV(state, old_state);
1097 if (prev != old_prev)
1098 order_changed = true;
1099 if ((state->initial || order_changed) && prev != CIRCLEQ_END(&state_head)) {
1100 stacking_changed = true;
1101 //DLOG("Stacking 0x%08x above 0x%08x\n", prev->id, state->id);
1103 mask |= XCB_CONFIG_WINDOW_SIBLING;
1104 mask |= XCB_CONFIG_WINDOW_STACK_MODE;
1105 uint32_t values[] = {state->id, XCB_STACK_MODE_ABOVE};
1107 xcb_configure_window(conn, prev->id, mask, values);
1109 state->initial = false;
1112 /* If we re-stacked something (or a new window appeared), we need to update
1113 * the _NET_CLIENT_LIST and _NET_CLIENT_LIST_STACKING hints */
1114 if (stacking_changed) {
1115 DLOG("Client list changed (%i clients)\n", cnt);
1116 ewmh_update_client_list_stacking(client_list_windows, client_list_count);
1118 walk = client_list_windows;
1120 /* reorder by initial mapping */
1121 TAILQ_FOREACH(state, &initial_mapping_head, initial_mapping_order) {
1122 if (con_has_managed_window(state->con))
1123 *walk++ = state->con->window->id;
1126 ewmh_update_client_list(client_list_windows, client_list_count);
1129 DLOG("PUSHING CHANGES\n");
1133 xcb_query_pointer_reply_t *pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL);
1134 if (!pointerreply) {
1135 ELOG("Could not query pointer position, not warping pointer\n");
1137 int mid_x = warp_to->x + (warp_to->width / 2);
1138 int mid_y = warp_to->y + (warp_to->height / 2);
1140 Output *current = get_output_containing(pointerreply->root_x, pointerreply->root_y);
1141 Output *target = get_output_containing(mid_x, mid_y);
1142 if (current != target) {
1143 /* Ignore MotionNotify events generated by warping */
1144 xcb_change_window_attributes(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT});
1145 xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0, mid_x, mid_y);
1146 xcb_change_window_attributes(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){ROOT_EVENT_MASK});
1154 //DLOG("Re-enabling EnterNotify\n");
1155 values[0] = FRAME_EVENT_MASK;
1156 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1158 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
1160 //DLOG("Done, EnterNotify re-enabled\n");
1162 x_deco_recurse(con);
1164 xcb_window_t to_focus = focused->frame.id;
1165 if (focused->window != NULL)
1166 to_focus = focused->window->id;
1168 if (focused_id != to_focus) {
1169 if (!focused->mapped) {
1170 DLOG("Not updating focus (to %p / %s), focused window is not mapped.\n", focused, focused->name);
1171 /* Invalidate focused_id to correctly focus new windows with the same ID */
1172 focused_id = XCB_NONE;
1174 if (focused->window != NULL &&
1175 focused->window->needs_take_focus &&
1176 focused->window->doesnt_accept_focus) {
1177 DLOG("Updating focus by sending WM_TAKE_FOCUS to window 0x%08x (focused: %p / %s)\n",
1178 to_focus, focused, focused->name);
1179 send_take_focus(to_focus, last_timestamp);
1181 change_ewmh_focus((con_has_managed_window(focused) ? focused->window->id : XCB_WINDOW_NONE), last_focused);
1183 if (to_focus != last_focused && is_con_attached(focused))
1184 ipc_send_window_event("focus", focused);
1186 DLOG("Updating focus (focused: %p / %s) to X11 window 0x%08x\n", focused, focused->name, to_focus);
1187 /* We remove XCB_EVENT_MASK_FOCUS_CHANGE from the event mask to get
1188 * no focus change events for our own focus changes. We only want
1189 * these generated by the clients. */
1190 if (focused->window != NULL) {
1191 values[0] = CHILD_EVENT_MASK & ~(XCB_EVENT_MASK_FOCUS_CHANGE);
1192 xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values);
1194 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, to_focus, last_timestamp);
1195 if (focused->window != NULL) {
1196 values[0] = CHILD_EVENT_MASK;
1197 xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values);
1200 change_ewmh_focus((con_has_managed_window(focused) ? focused->window->id : XCB_WINDOW_NONE), last_focused);
1202 if (to_focus != XCB_NONE && to_focus != last_focused && focused->window != NULL && is_con_attached(focused))
1203 ipc_send_window_event("focus", focused);
1206 focused_id = last_focused = to_focus;
1210 if (focused_id == XCB_NONE) {
1211 /* If we still have no window to focus, we focus the EWMH window instead. We use this rather than the
1212 * root window in order to avoid an X11 fallback mechanism causing a ghosting effect (see #1378). */
1213 DLOG("Still no window focused, better set focus to the EWMH support window (%d)\n", ewmh_window);
1214 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, ewmh_window, last_timestamp);
1215 change_ewmh_focus(XCB_WINDOW_NONE, last_focused);
1217 focused_id = ewmh_window;
1221 DLOG("ENDING CHANGES\n");
1223 /* Disable EnterWindow events for windows which will be unmapped in
1224 * x_push_node_unmaps() now. Unmapping windows happens when switching
1225 * workspaces. We want to avoid getting EnterNotifies during that phase
1226 * because they would screw up our focus. One of these cases is having a
1227 * stack with two windows. If the first window is focused and gets
1228 * unmapped, the second one appears under the cursor and therefore gets an
1229 * EnterNotify event. */
1230 values[0] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
1231 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1232 if (!state->unmap_now)
1234 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
1237 /* Push all pending unmaps */
1238 x_push_node_unmaps(con);
1240 /* save the current stack as old stack */
1241 CIRCLEQ_FOREACH(state, &state_head, state) {
1242 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
1243 CIRCLEQ_INSERT_TAIL(&old_state_head, state, old_state);
1245 //CIRCLEQ_FOREACH(state, &old_state_head, old_state) {
1246 // DLOG("old stack: 0x%08x\n", state->id);
1253 * Raises the specified container in the internal stack of X windows. The
1254 * next call to x_push_changes() will make the change visible in X11.
1257 void x_raise_con(Con *con) {
1259 state = state_for_frame(con->frame.id);
1260 //DLOG("raising in new stack: %p / %s / %s / xid %08x\n", con, con->name, con->window ? con->window->name_json : "", state->id);
1262 CIRCLEQ_REMOVE(&state_head, state, state);
1263 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
1267 * Sets the WM_NAME property (so, no UTF8, but used only for debugging anyways)
1268 * of the given name. Used for properly tagging the windows for easily spotting
1269 * i3 windows in xwininfo -root -all.
1272 void x_set_name(Con *con, const char *name) {
1273 struct con_state *state;
1275 if ((state = state_for_frame(con->frame.id)) == NULL) {
1276 ELOG("window state not found\n");
1281 state->name = sstrdup(name);
1285 * Set up the I3_SHMLOG_PATH atom.
1288 void update_shmlog_atom(void) {
1289 if (*shmlogname == '\0') {
1290 xcb_delete_property(conn, root, A_I3_SHMLOG_PATH);
1292 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
1293 A_I3_SHMLOG_PATH, A_UTF8_STRING, 8,
1294 strlen(shmlogname), shmlogname);
1299 * Sets up i3 specific atoms (I3_SOCKET_PATH and I3_CONFIG_PATH)
1302 void x_set_i3_atoms(void) {
1303 pid_t pid = getpid();
1304 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_SOCKET_PATH, A_UTF8_STRING, 8,
1305 (current_socketpath == NULL ? 0 : strlen(current_socketpath)),
1306 current_socketpath);
1307 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_PID, XCB_ATOM_CARDINAL, 32, 1, &pid);
1308 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_CONFIG_PATH, A_UTF8_STRING, 8,
1309 strlen(current_configpath), current_configpath);
1310 update_shmlog_atom();
1314 * Set warp_to coordinates. This will trigger on the next call to
1318 void x_set_warp_to(Rect *rect) {
1319 if (config.mouse_warping != POINTER_WARPING_NONE)
1324 * Applies the given mask to the event mask of every i3 window decoration X11
1325 * window. This is useful to disable EnterNotify while resizing so that focus
1329 void x_mask_event_mask(uint32_t mask) {
1330 uint32_t values[] = {FRAME_EVENT_MASK & mask};
1333 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1335 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);