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 * Initializes the X11 part for the given container. Called exactly once for
104 * every container from con_new().
107 void x_con_init(Con *con) {
108 /* TODO: maybe create the window when rendering first? we could then even
109 * get the initial geometry right */
114 xcb_visualid_t visual = get_visualid_by_depth(con->depth);
115 xcb_colormap_t win_colormap;
116 if (con->depth != root_depth) {
117 /* We need to create a custom colormap. */
118 win_colormap = xcb_generate_id(conn);
119 xcb_create_colormap(conn, XCB_COLORMAP_ALLOC_NONE, win_colormap, root, visual);
120 con->colormap = win_colormap;
122 /* Use the default colormap. */
123 win_colormap = colormap;
124 con->colormap = XCB_NONE;
127 /* We explicitly set a background color and border color (even though we
128 * don’t even have a border) because the X11 server requires us to when
129 * using 32 bit color depths, see
130 * http://stackoverflow.com/questions/3645632 */
131 mask |= XCB_CW_BACK_PIXEL;
132 values[0] = root_screen->black_pixel;
134 mask |= XCB_CW_BORDER_PIXEL;
135 values[1] = root_screen->black_pixel;
137 /* our own frames should not be managed */
138 mask |= XCB_CW_OVERRIDE_REDIRECT;
141 /* see include/xcb.h for the FRAME_EVENT_MASK */
142 mask |= XCB_CW_EVENT_MASK;
143 values[3] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
145 mask |= XCB_CW_COLORMAP;
146 values[4] = win_colormap;
148 Rect dims = {-15, -15, 10, 10};
149 xcb_window_t frame_id = create_window(conn, dims, con->depth, visual, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCURSOR_CURSOR_POINTER, false, mask, values);
150 draw_util_surface_init(conn, &(con->frame), frame_id, get_visualtype_by_id(visual), dims.width, dims.height);
151 xcb_change_property(conn,
152 XCB_PROP_MODE_REPLACE,
157 (strlen("i3-frame") + 1) * 2,
158 "i3-frame\0i3-frame\0");
160 struct con_state *state = scalloc(1, sizeof(struct con_state));
161 state->id = con->frame.id;
162 state->mapped = false;
163 state->initial = true;
164 DLOG("Adding window 0x%08x to lists\n", state->id);
165 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
166 CIRCLEQ_INSERT_HEAD(&old_state_head, state, old_state);
167 TAILQ_INSERT_TAIL(&initial_mapping_head, state, initial_mapping_order);
168 DLOG("adding new state for window id 0x%08x\n", state->id);
172 * Re-initializes the associated X window state for this container. You have
173 * to call this when you assign a client to an empty container to ensure that
174 * its state gets updated correctly.
177 void x_reinit(Con *con) {
178 struct con_state *state;
180 if ((state = state_for_frame(con->frame.id)) == NULL) {
181 ELOG("window state not found\n");
185 DLOG("resetting state %p to initial\n", state);
186 state->initial = true;
187 state->child_mapped = false;
189 memset(&(state->window_rect), 0, sizeof(Rect));
193 * Reparents the child window of the given container (necessary for sticky
194 * containers). The reparenting happens in the next call of x_push_changes().
197 void x_reparent_child(Con *con, Con *old) {
198 struct con_state *state;
199 if ((state = state_for_frame(con->frame.id)) == NULL) {
200 ELOG("window state for con not found\n");
204 state->need_reparent = true;
205 state->old_frame = old->frame.id;
209 * Moves a child window from Container src to Container dest.
212 void x_move_win(Con *src, Con *dest) {
213 struct con_state *state_src, *state_dest;
215 if ((state_src = state_for_frame(src->frame.id)) == NULL) {
216 ELOG("window state for src not found\n");
220 if ((state_dest = state_for_frame(dest->frame.id)) == NULL) {
221 ELOG("window state for dest not found\n");
225 state_dest->con = state_src->con;
226 state_src->con = NULL;
228 Rect zero = {0, 0, 0, 0};
229 if (memcmp(&(state_dest->window_rect), &(zero), sizeof(Rect)) == 0) {
230 memcpy(&(state_dest->window_rect), &(state_src->window_rect), sizeof(Rect));
231 DLOG("COPYING RECT\n");
236 * Kills the window decoration associated with the given container.
239 void x_con_kill(Con *con) {
242 if (con->colormap != XCB_NONE) {
243 xcb_free_colormap(conn, con->colormap);
246 draw_util_surface_free(conn, &(con->frame));
247 draw_util_surface_free(conn, &(con->frame_buffer));
248 xcb_destroy_window(conn, con->frame.id);
249 xcb_free_pixmap(conn, con->frame_buffer.id);
250 state = state_for_frame(con->frame.id);
251 CIRCLEQ_REMOVE(&state_head, state, state);
252 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
253 TAILQ_REMOVE(&initial_mapping_head, state, initial_mapping_order);
257 /* Invalidate focused_id to correctly focus new windows with the same ID */
258 focused_id = last_focused = XCB_NONE;
262 * Returns true if the client supports the given protocol atom (like WM_DELETE_WINDOW)
265 bool window_supports_protocol(xcb_window_t window, xcb_atom_t atom) {
266 xcb_get_property_cookie_t cookie;
267 xcb_icccm_get_wm_protocols_reply_t protocols;
270 cookie = xcb_icccm_get_wm_protocols(conn, window, A_WM_PROTOCOLS);
271 if (xcb_icccm_get_wm_protocols_reply(conn, cookie, &protocols, NULL) != 1)
274 /* Check if the client’s protocols have the requested atom set */
275 for (uint32_t i = 0; i < protocols.atoms_len; i++)
276 if (protocols.atoms[i] == atom)
279 xcb_icccm_get_wm_protocols_reply_wipe(&protocols);
285 * Kills the given X11 window using WM_DELETE_WINDOW (if supported).
288 void x_window_kill(xcb_window_t window, kill_window_t kill_window) {
289 /* if this window does not support WM_DELETE_WINDOW, we kill it the hard way */
290 if (!window_supports_protocol(window, A_WM_DELETE_WINDOW)) {
291 if (kill_window == KILL_WINDOW) {
292 LOG("Killing specific window 0x%08x\n", window);
293 xcb_destroy_window(conn, window);
295 LOG("Killing the X11 client which owns window 0x%08x\n", window);
296 xcb_kill_client(conn, window);
301 /* Every X11 event is 32 bytes long. Therefore, XCB will copy 32 bytes.
302 * In order to properly initialize these bytes, we allocate 32 bytes even
303 * though we only need less for an xcb_configure_notify_event_t */
304 void *event = scalloc(32, 1);
305 xcb_client_message_event_t *ev = event;
307 ev->response_type = XCB_CLIENT_MESSAGE;
309 ev->type = A_WM_PROTOCOLS;
311 ev->data.data32[0] = A_WM_DELETE_WINDOW;
312 ev->data.data32[1] = XCB_CURRENT_TIME;
314 LOG("Sending WM_DELETE to the client\n");
315 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char *)ev);
320 static void x_draw_title_border(Con *con, struct deco_render_params *p) {
321 assert(con->parent != NULL);
323 Rect *dr = &(con->deco_rect);
324 adjacent_t borders_to_hide = con_adjacent_borders(con) & config.hide_edge_borders;
325 int deco_diff_l = borders_to_hide & ADJ_LEFT_SCREEN_EDGE ? 0 : con->current_border_width;
326 int deco_diff_r = borders_to_hide & ADJ_RIGHT_SCREEN_EDGE ? 0 : con->current_border_width;
327 if (con->parent->layout == L_TABBED ||
328 (con->parent->layout == L_STACKED && TAILQ_NEXT(con, nodes) != NULL)) {
333 draw_util_rectangle(conn, &(con->parent->frame_buffer), p->color->border,
334 dr->x, dr->y, dr->width, 1);
336 draw_util_rectangle(conn, &(con->parent->frame_buffer), p->color->border,
337 dr->x + deco_diff_l, dr->y + dr->height - 1, dr->width - (deco_diff_l + deco_diff_r), 1);
340 static void x_draw_decoration_after_title(Con *con, struct deco_render_params *p) {
341 assert(con->parent != NULL);
343 Rect *dr = &(con->deco_rect);
345 /* Redraw the right border to cut off any text that went past it.
346 * This is necessary when the text was drawn using XCB since cutting text off
347 * automatically does not work there. For pango rendering, this isn't necessary. */
348 if (!font_is_pango()) {
349 /* We actually only redraw the far right two pixels as that is the
350 * distance we keep from the edge (not the entire border width).
351 * Redrawing the entire border would cause text to be cut off. */
352 draw_util_rectangle(conn, &(con->parent->frame_buffer), p->color->background,
353 dr->x + dr->width - 2 * logical_px(1),
359 /* Draw a 1px separator line before and after every tab, so that tabs can
360 * be easily distinguished. */
361 if (con->parent->layout == L_TABBED) {
363 draw_util_rectangle(conn, &(con->parent->frame_buffer), p->color->border,
364 dr->x, dr->y, 1, dr->height);
367 draw_util_rectangle(conn, &(con->parent->frame_buffer), p->color->border,
368 dr->x + dr->width - 1, dr->y, 1, dr->height);
371 /* Redraw the border. */
372 x_draw_title_border(con, p);
376 * Draws the decoration of the given container onto its parent.
379 void x_draw_decoration(Con *con) {
380 Con *parent = con->parent;
381 bool leaf = con_is_leaf(con);
383 /* This code needs to run for:
385 * • non-leaf containers which are in a stacked/tabbed container
387 * It does not need to run for:
388 * • direct children of outputs or dockareas
389 * • floating containers (they don’t have a decoration)
392 parent->layout != L_STACKED &&
393 parent->layout != L_TABBED) ||
394 parent->type == CT_OUTPUT ||
395 parent->type == CT_DOCKAREA ||
396 con->type == CT_FLOATING_CON)
399 /* Skip containers whose height is 0 (for example empty dockareas) */
400 if (con->rect.height == 0)
403 /* Skip containers whose pixmap has not yet been created (can happen when
404 * decoration rendering happens recursively for a window for which
405 * x_push_node() was not yet called) */
406 if (leaf && con->frame_buffer.id == XCB_NONE)
409 /* 1: build deco_params and compare with cache */
410 struct deco_render_params *p = scalloc(1, sizeof(struct deco_render_params));
412 /* find out which colors to use */
414 p->color = &config.client.urgent;
415 else if (con == focused || con_inside_focused(con))
416 p->color = &config.client.focused;
417 else if (con == TAILQ_FIRST(&(parent->focus_head)))
418 p->color = &config.client.focused_inactive;
420 p->color = &config.client.unfocused;
422 p->border_style = con_border_style(con);
424 Rect *r = &(con->rect);
425 Rect *w = &(con->window_rect);
426 p->con_rect = (struct width_height){r->width, r->height};
427 p->con_window_rect = (struct width_height){w->width, w->height};
428 p->con_deco_rect = con->deco_rect;
429 p->background = config.client.background;
430 p->con_is_leaf = con_is_leaf(con);
431 p->parent_layout = con->parent->layout;
433 if (con->deco_render_params != NULL &&
434 (con->window == NULL || !con->window->name_x_changed) &&
435 !parent->pixmap_recreated &&
436 !con->pixmap_recreated &&
437 !con->mark_changed &&
438 memcmp(p, con->deco_render_params, sizeof(struct deco_render_params)) == 0) {
444 while ((next = TAILQ_NEXT(next, nodes))) {
445 FREE(next->deco_render_params);
448 FREE(con->deco_render_params);
449 con->deco_render_params = p;
451 if (con->window != NULL && con->window->name_x_changed)
452 con->window->name_x_changed = false;
454 parent->pixmap_recreated = false;
455 con->pixmap_recreated = false;
456 con->mark_changed = false;
458 /* 2: draw the client.background, but only for the parts around the window_rect */
459 if (con->window != NULL) {
461 draw_util_rectangle(conn, &(con->frame_buffer), config.client.background,
462 0, 0, r->width, w->y);
464 draw_util_rectangle(conn, &(con->frame_buffer), config.client.background,
465 0, w->y + w->height, r->width, r->height - (w->y + w->height));
467 draw_util_rectangle(conn, &(con->frame_buffer), config.client.background,
468 0, 0, w->x, r->height);
470 draw_util_rectangle(conn, &(con->frame_buffer), config.client.background,
471 w->x + w->width, 0, r->width - (w->x + w->width), r->height);
474 /* 3: draw a rectangle in border color around the client */
475 if (p->border_style != BS_NONE && p->con_is_leaf) {
476 /* We might hide some borders adjacent to the screen-edge */
477 adjacent_t borders_to_hide = ADJ_NONE;
478 borders_to_hide = con_adjacent_borders(con) & config.hide_edge_borders;
480 Rect br = con_border_style_rect(con);
482 /* These rectangles represent the border around the child window
483 * (left, bottom and right part). We don’t just fill the whole
484 * rectangle because some childs are not freely resizable and we want
485 * their background color to "shine through". */
486 if (!(borders_to_hide & ADJ_LEFT_SCREEN_EDGE)) {
487 draw_util_rectangle(conn, &(con->frame_buffer), p->color->child_border, 0, 0, br.x, r->height);
489 if (!(borders_to_hide & ADJ_RIGHT_SCREEN_EDGE)) {
490 draw_util_rectangle(conn, &(con->frame_buffer),
491 p->color->child_border, r->width + (br.width + br.x), 0,
492 -(br.width + br.x), r->height);
494 if (!(borders_to_hide & ADJ_LOWER_SCREEN_EDGE)) {
495 draw_util_rectangle(conn, &(con->frame_buffer),
496 p->color->child_border, br.x, r->height + (br.height + br.y),
497 r->width + br.width, -(br.height + br.y));
499 /* pixel border needs an additional line at the top */
500 if (p->border_style == BS_PIXEL && !(borders_to_hide & ADJ_UPPER_SCREEN_EDGE)) {
501 draw_util_rectangle(conn, &(con->frame_buffer),
502 p->color->child_border, br.x, 0, r->width + br.width, br.y);
505 /* Highlight the side of the border at which the next window will be
506 * opened if we are rendering a single window within a split container
507 * (which is undistinguishable from a single window outside a split
508 * container otherwise. */
509 if (TAILQ_NEXT(con, nodes) == NULL &&
510 TAILQ_PREV(con, nodes_head, nodes) == NULL &&
511 con->parent->type != CT_FLOATING_CON) {
512 if (p->parent_layout == L_SPLITH) {
513 draw_util_rectangle(conn, &(con->frame_buffer), p->color->indicator,
514 r->width + (br.width + br.x), br.y, -(br.width + br.x), r->height + br.height);
515 } else if (p->parent_layout == L_SPLITV) {
516 draw_util_rectangle(conn, &(con->frame_buffer), p->color->indicator,
517 br.x, r->height + (br.height + br.y), r->width + br.width, -(br.height + br.y));
522 /* if this is a borderless/1pixel window, we don’t need to render the
524 if (p->border_style != BS_NORMAL)
527 /* If the parent hasn't been set up yet, skip the decoration rendering
529 if (parent->frame_buffer.id == XCB_NONE)
532 /* For the first child, we clear the parent pixmap to ensure there's no
533 * garbage left on there. This is important to avoid tearing when using
535 if (con == TAILQ_FIRST(&(con->parent->nodes_head))) {
536 draw_util_clear_surface(conn, &(con->parent->frame_buffer), COLOR_TRANSPARENT);
537 FREE(con->parent->deco_render_params);
540 /* 4: paint the bar */
541 draw_util_rectangle(conn, &(parent->frame_buffer), p->color->background,
542 con->deco_rect.x, con->deco_rect.y, con->deco_rect.width, con->deco_rect.height);
544 /* 5: draw two unconnected horizontal lines in border color */
545 x_draw_title_border(con, p);
547 /* 6: draw the title */
548 int text_offset_y = (con->deco_rect.height - config.font.height) / 2;
550 struct Window *win = con->window;
553 if (con->title_format == NULL) {
555 char *tree = con_get_tree_representation(con);
556 sasprintf(&_title, "i3: %s", tree);
559 title = i3string_from_utf8(_title);
562 title = con_parse_title_format(con);
565 draw_util_text(title, &(parent->frame_buffer),
566 p->color->text, p->color->background,
567 con->deco_rect.x + logical_px(2),
568 con->deco_rect.y + text_offset_y,
569 con->deco_rect.width - 2 * logical_px(2));
570 I3STRING_FREE(title);
575 if (win->name == NULL)
579 if (config.show_marks && !TAILQ_EMPTY(&(con->marks_head))) {
580 char *formatted_mark = sstrdup("");
581 bool had_visible_mark = false;
584 TAILQ_FOREACH(mark, &(con->marks_head), marks) {
585 if (mark->name[0] == '_')
587 had_visible_mark = true;
590 sasprintf(&buf, "%s[%s]", formatted_mark, mark->name);
591 free(formatted_mark);
592 formatted_mark = buf;
595 if (had_visible_mark) {
596 i3String *mark = i3string_from_utf8(formatted_mark);
597 mark_width = predict_text_width(mark);
599 draw_util_text(mark, &(parent->frame_buffer),
600 p->color->text, p->color->background,
601 con->deco_rect.x + con->deco_rect.width - mark_width - logical_px(2),
602 con->deco_rect.y + text_offset_y, mark_width);
607 FREE(formatted_mark);
610 i3String *title = con->title_format == NULL ? win->name : con_parse_title_format(con);
611 draw_util_text(title, &(parent->frame_buffer),
612 p->color->text, p->color->background,
613 con->deco_rect.x + logical_px(2),
614 con->deco_rect.y + text_offset_y,
615 con->deco_rect.width - mark_width - 2 * logical_px(2));
616 if (con->title_format != NULL)
617 I3STRING_FREE(title);
620 x_draw_decoration_after_title(con, p);
622 draw_util_copy_surface(conn, &(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height);
626 * Recursively calls x_draw_decoration. This cannot be done in x_push_node
627 * because x_push_node uses focus order to recurse (see the comment above)
628 * while drawing the decoration needs to happen in the actual order.
631 void x_deco_recurse(Con *con) {
633 bool leaf = TAILQ_EMPTY(&(con->nodes_head)) &&
634 TAILQ_EMPTY(&(con->floating_head));
635 con_state *state = state_for_frame(con->frame.id);
638 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
639 x_deco_recurse(current);
641 TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
642 x_deco_recurse(current);
645 draw_util_copy_surface(conn, &(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height);
649 if ((con->type != CT_ROOT && con->type != CT_OUTPUT) &&
650 (!leaf || con->mapped))
651 x_draw_decoration(con);
655 * Sets or removes the _NET_WM_STATE_HIDDEN property on con if necessary.
658 static void set_hidden_state(Con *con) {
659 if (con->window == NULL) {
663 con_state *state = state_for_frame(con->frame.id);
664 bool should_be_hidden = con_is_hidden(con);
665 if (should_be_hidden == state->is_hidden)
668 if (should_be_hidden) {
669 DLOG("setting _NET_WM_STATE_HIDDEN for con = %p\n", con);
670 xcb_add_property_atom(conn, con->window->id, A__NET_WM_STATE, A__NET_WM_STATE_HIDDEN);
672 DLOG("removing _NET_WM_STATE_HIDDEN for con = %p\n", con);
673 xcb_remove_property_atom(conn, con->window->id, A__NET_WM_STATE, A__NET_WM_STATE_HIDDEN);
676 state->is_hidden = should_be_hidden;
680 * This function pushes the properties of each node of the layout tree to
681 * X11 if they have changed (like the map state, position of the window, …).
682 * It recursively traverses all children of the given node.
685 void x_push_node(Con *con) {
688 Rect rect = con->rect;
690 //DLOG("Pushing changes for node %p / %s\n", con, con->name);
691 state = state_for_frame(con->frame.id);
693 if (state->name != NULL) {
694 DLOG("pushing name %s for con %p\n", state->name, con);
696 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->frame.id,
697 XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 8, strlen(state->name), state->name);
701 if (con->window == NULL) {
702 /* Calculate the height of all window decorations which will be drawn on to
704 uint32_t max_y = 0, max_height = 0;
705 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
706 Rect *dr = &(current->deco_rect);
707 if (dr->y >= max_y && dr->height >= max_height) {
709 max_height = dr->height;
712 rect.height = max_y + max_height;
713 if (rect.height == 0)
717 /* reparent the child window (when the window was moved due to a sticky
719 if (state->need_reparent && con->window != NULL) {
720 DLOG("Reparenting child window\n");
722 /* Temporarily set the event masks to XCB_NONE so that we won’t get
723 * UnmapNotify events (otherwise the handler would close the container).
724 * These events are generated automatically when reparenting. */
725 uint32_t values[] = {XCB_NONE};
726 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
727 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
729 xcb_reparent_window(conn, con->window->id, con->frame.id, 0, 0);
731 values[0] = FRAME_EVENT_MASK;
732 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
733 values[0] = CHILD_EVENT_MASK;
734 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
736 state->old_frame = XCB_NONE;
737 state->need_reparent = false;
740 DLOG("ignore_unmap for reparenting of con %p (win 0x%08x) is now %d\n",
741 con, con->window->id, con->ignore_unmap);
744 /* The pixmap of a borderless leaf container will not be used except
745 * for the titlebar in a stack or tabs (issue #1013). */
746 bool is_pixmap_needed = (con->border_style != BS_NONE ||
748 con->parent->layout == L_STACKED ||
749 con->parent->layout == L_TABBED);
751 /* The root con and output cons will never require a pixmap. In particular for the
752 * __i3 output, this will likely not work anyway because it might be ridiculously
753 * large, causing an XCB_ALLOC error. */
754 if (con->type == CT_ROOT || con->type == CT_OUTPUT)
755 is_pixmap_needed = false;
757 bool fake_notify = false;
758 /* Set new position if rect changed (and if height > 0) or if the pixmap
759 * needs to be recreated */
760 if ((is_pixmap_needed && con->frame_buffer.id == XCB_NONE) || (memcmp(&(state->rect), &rect, sizeof(Rect)) != 0 &&
762 /* We first create the new pixmap, then render to it, set it as the
763 * background and only afterwards change the window size. This reduces
766 /* As the pixmap only depends on the size and not on the position, it
767 * is enough to check if width/height have changed. Also, we don’t
768 * create a pixmap at all when the window is actually not visible
769 * (height == 0) or when it is not needed. */
770 bool has_rect_changed = (state->rect.width != rect.width || state->rect.height != rect.height);
772 /* Check if the container has an unneeded pixmap left over from
773 * previously having a border or titlebar. */
774 if (!is_pixmap_needed && con->frame_buffer.id != XCB_NONE) {
775 draw_util_surface_free(conn, &(con->frame_buffer));
776 xcb_free_pixmap(conn, con->frame_buffer.id);
777 con->frame_buffer.id = XCB_NONE;
780 if (is_pixmap_needed && (has_rect_changed || con->frame_buffer.id == XCB_NONE)) {
781 if (con->frame_buffer.id == XCB_NONE) {
782 con->frame_buffer.id = xcb_generate_id(conn);
784 draw_util_surface_free(conn, &(con->frame_buffer));
785 xcb_free_pixmap(conn, con->frame_buffer.id);
788 uint16_t win_depth = root_depth;
790 win_depth = con->window->depth;
792 /* Ensure we have valid dimensions for our surface. */
793 // TODO This is probably a bug in the condition above as we should never enter this path
794 // for height == 0. Also, we should probably handle width == 0 the same way.
795 int width = MAX((int32_t)rect.width, 1);
796 int height = MAX((int32_t)rect.height, 1);
798 xcb_create_pixmap(conn, win_depth, con->frame_buffer.id, con->frame.id, width, height);
799 draw_util_surface_init(conn, &(con->frame_buffer), con->frame_buffer.id,
800 get_visualtype_by_id(get_visualid_by_depth(win_depth)), width, height);
802 /* For the graphics context, we disable GraphicsExposure events.
803 * Those will be sent when a CopyArea request cannot be fulfilled
804 * properly due to parts of the source being unmapped or otherwise
805 * unavailable. Since we always copy from pixmaps to windows, this
806 * is not a concern for us. */
807 xcb_change_gc(conn, con->frame_buffer.gc, XCB_GC_GRAPHICS_EXPOSURES, (uint32_t[]){0});
809 draw_util_surface_set_size(&(con->frame), width, height);
810 con->pixmap_recreated = true;
812 /* Don’t render the decoration for windows inside a stack which are
813 * not visible right now */
814 // TODO Should this work the same way for L_TABBED?
816 con->parent->layout != L_STACKED ||
817 TAILQ_FIRST(&(con->parent->focus_head)) == con)
818 /* Render the decoration now to make the correct decoration visible
819 * from the very first moment. Later calls will be cached, so this
820 * doesn’t hurt performance. */
824 DLOG("setting rect (%d, %d, %d, %d)\n", rect.x, rect.y, rect.width, rect.height);
825 /* flush to ensure that the following commands are sent in a single
826 * buffer and will be processed directly afterwards (the contents of a
827 * window get lost when resizing it, therefore we want to provide it as
828 * fast as possible) */
830 xcb_set_window_rect(conn, con->frame.id, rect);
831 if (con->frame_buffer.id != XCB_NONE) {
832 draw_util_copy_surface(conn, &(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height);
836 memcpy(&(state->rect), &rect, sizeof(Rect));
840 /* dito, but for child windows */
841 if (con->window != NULL &&
842 memcmp(&(state->window_rect), &(con->window_rect), sizeof(Rect)) != 0) {
843 DLOG("setting window rect (%d, %d, %d, %d)\n",
844 con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
845 xcb_set_window_rect(conn, con->window->id, con->window_rect);
846 memcpy(&(state->window_rect), &(con->window_rect), sizeof(Rect));
850 /* Map if map state changed, also ensure that the child window
851 * is changed if we are mapped and there is a new, unmapped child window.
852 * Unmaps are handled in x_push_node_unmaps(). */
853 if ((state->mapped != con->mapped || (con->window != NULL && !state->child_mapped)) &&
855 xcb_void_cookie_t cookie;
857 if (con->window != NULL) {
858 /* Set WM_STATE_NORMAL because GTK applications don’t want to
859 * drag & drop if we don’t. Also, xprop(1) needs it. */
860 long data[] = {XCB_ICCCM_WM_STATE_NORMAL, XCB_NONE};
861 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
862 A_WM_STATE, A_WM_STATE, 32, 2, data);
866 if (!state->child_mapped && con->window != NULL) {
867 cookie = xcb_map_window(conn, con->window->id);
869 /* We are interested in EnterNotifys as soon as the window is
871 values[0] = CHILD_EVENT_MASK;
872 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
873 DLOG("mapping child window (serial %d)\n", cookie.sequence);
874 state->child_mapped = true;
877 cookie = xcb_map_window(conn, con->frame.id);
879 values[0] = FRAME_EVENT_MASK;
880 xcb_change_window_attributes(conn, con->frame.id, XCB_CW_EVENT_MASK, values);
882 /* copy the pixmap contents to the frame window immediately after mapping */
883 if (con->frame_buffer.id != XCB_NONE) {
884 draw_util_copy_surface(conn, &(con->frame_buffer), &(con->frame), 0, 0, 0, 0, con->rect.width, con->rect.height);
888 DLOG("mapping container %08x (serial %d)\n", con->frame.id, cookie.sequence);
889 state->mapped = con->mapped;
892 state->unmap_now = (state->mapped != con->mapped) && !con->mapped;
895 DLOG("Sending fake configure notify\n");
896 fake_absolute_configure_notify(con);
899 set_hidden_state(con);
901 /* Handle all children and floating windows of this node. We recurse
902 * in focus order to display the focused client in a stack first when
903 * switching workspaces (reduces flickering). */
904 TAILQ_FOREACH(current, &(con->focus_head), focused)
905 x_push_node(current);
909 * Same idea as in x_push_node(), but this function only unmaps windows. It is
910 * necessary to split this up to handle new fullscreen clients properly: The
911 * new window needs to be mapped and focus needs to be set *before* the
912 * underlying windows are unmapped. Otherwise, focus will revert to the
913 * PointerRoot and will then be set to the new window, generating unnecessary
914 * FocusIn/FocusOut events.
917 static void x_push_node_unmaps(Con *con) {
921 //DLOG("Pushing changes (with unmaps) for node %p / %s\n", con, con->name);
922 state = state_for_frame(con->frame.id);
924 /* map/unmap if map state changed, also ensure that the child window
925 * is changed if we are mapped *and* in initial state (meaning the
926 * container was empty before, but now got a child) */
927 if (state->unmap_now) {
928 xcb_void_cookie_t cookie;
929 if (con->window != NULL) {
930 /* Set WM_STATE_WITHDRAWN, it seems like Java apps need it */
931 long data[] = {XCB_ICCCM_WM_STATE_WITHDRAWN, XCB_NONE};
932 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
933 A_WM_STATE, A_WM_STATE, 32, 2, data);
936 cookie = xcb_unmap_window(conn, con->frame.id);
937 DLOG("unmapping container %p / %s (serial %d)\n", con, con->name, cookie.sequence);
938 /* we need to increase ignore_unmap for this container (if it
939 * contains a window) and for every window "under" this one which
940 * contains a window */
941 if (con->window != NULL) {
943 DLOG("ignore_unmap for con %p (frame 0x%08x) now %d\n", con, con->frame.id, con->ignore_unmap);
945 state->mapped = con->mapped;
948 /* handle all children and floating windows of this node */
949 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
950 x_push_node_unmaps(current);
952 TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
953 x_push_node_unmaps(current);
957 * Returns true if the given container is currently attached to its parent.
959 * TODO: Remove once #1185 has been fixed
961 static bool is_con_attached(Con *con) {
962 if (con->parent == NULL)
966 TAILQ_FOREACH(current, &(con->parent->nodes_head), nodes) {
975 * Pushes all changes (state of each node, see x_push_node() and the window
978 * NOTE: We need to push the stack first so that the windows have the correct
979 * stacking order. This is relevant for workspace switching where we map the
980 * windows because mapping may generate EnterNotify events. When they are
981 * generated in the wrong order, this will cause focus problems when switching
985 void x_push_changes(Con *con) {
987 xcb_query_pointer_cookie_t pointercookie;
989 /* If we need to warp later, we request the pointer position as soon as possible */
991 pointercookie = xcb_query_pointer(conn, root);
994 DLOG("-- PUSHING WINDOW STACK --\n");
995 //DLOG("Disabling EnterNotify\n");
996 /* We need to keep SubstructureRedirect around, otherwise clients can send
997 * ConfigureWindow requests and get them applied directly instead of having
998 * them become ConfigureRequests that i3 handles. */
999 uint32_t values[1] = {XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT};
1000 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1002 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
1004 //DLOG("Done, EnterNotify disabled\n");
1005 bool order_changed = false;
1006 bool stacking_changed = false;
1008 /* count first, necessary to (re)allocate memory for the bottom-to-top
1009 * stack afterwards */
1011 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state)
1012 if (con_has_managed_window(state->con))
1015 /* The bottom-to-top window stack of all windows which are managed by i3.
1016 * Used for x_get_window_stack(). */
1017 static xcb_window_t *client_list_windows = NULL;
1018 static int client_list_count = 0;
1020 if (cnt != client_list_count) {
1021 client_list_windows = srealloc(client_list_windows, sizeof(xcb_window_t) * cnt);
1022 client_list_count = cnt;
1025 xcb_window_t *walk = client_list_windows;
1027 /* X11 correctly represents the stack if we push it from bottom to top */
1028 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1029 if (con_has_managed_window(state->con))
1030 memcpy(walk++, &(state->con->window->id), sizeof(xcb_window_t));
1032 //DLOG("stack: 0x%08x\n", state->id);
1033 con_state *prev = CIRCLEQ_PREV(state, state);
1034 con_state *old_prev = CIRCLEQ_PREV(state, old_state);
1035 if (prev != old_prev)
1036 order_changed = true;
1037 if ((state->initial || order_changed) && prev != CIRCLEQ_END(&state_head)) {
1038 stacking_changed = true;
1039 //DLOG("Stacking 0x%08x above 0x%08x\n", prev->id, state->id);
1041 mask |= XCB_CONFIG_WINDOW_SIBLING;
1042 mask |= XCB_CONFIG_WINDOW_STACK_MODE;
1043 uint32_t values[] = {state->id, XCB_STACK_MODE_ABOVE};
1045 xcb_configure_window(conn, prev->id, mask, values);
1047 state->initial = false;
1050 /* If we re-stacked something (or a new window appeared), we need to update
1051 * the _NET_CLIENT_LIST and _NET_CLIENT_LIST_STACKING hints */
1052 if (stacking_changed) {
1053 DLOG("Client list changed (%i clients)\n", cnt);
1054 ewmh_update_client_list_stacking(client_list_windows, client_list_count);
1056 walk = client_list_windows;
1058 /* reorder by initial mapping */
1059 TAILQ_FOREACH(state, &initial_mapping_head, initial_mapping_order) {
1060 if (con_has_managed_window(state->con))
1061 *walk++ = state->con->window->id;
1064 ewmh_update_client_list(client_list_windows, client_list_count);
1067 DLOG("PUSHING CHANGES\n");
1071 xcb_query_pointer_reply_t *pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL);
1072 if (!pointerreply) {
1073 ELOG("Could not query pointer position, not warping pointer\n");
1075 int mid_x = warp_to->x + (warp_to->width / 2);
1076 int mid_y = warp_to->y + (warp_to->height / 2);
1078 Output *current = get_output_containing(pointerreply->root_x, pointerreply->root_y);
1079 Output *target = get_output_containing(mid_x, mid_y);
1080 if (current != target) {
1081 /* Ignore MotionNotify events generated by warping */
1082 xcb_change_window_attributes(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT});
1083 xcb_warp_pointer(conn, XCB_NONE, root, 0, 0, 0, 0, mid_x, mid_y);
1084 xcb_change_window_attributes(conn, root, XCB_CW_EVENT_MASK, (uint32_t[]){ROOT_EVENT_MASK});
1092 //DLOG("Re-enabling EnterNotify\n");
1093 values[0] = FRAME_EVENT_MASK;
1094 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1096 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
1098 //DLOG("Done, EnterNotify re-enabled\n");
1100 x_deco_recurse(con);
1102 xcb_window_t to_focus = focused->frame.id;
1103 if (focused->window != NULL)
1104 to_focus = focused->window->id;
1106 if (focused_id != to_focus) {
1107 if (!focused->mapped) {
1108 DLOG("Not updating focus (to %p / %s), focused window is not mapped.\n", focused, focused->name);
1109 /* Invalidate focused_id to correctly focus new windows with the same ID */
1110 focused_id = XCB_NONE;
1112 if (focused->window != NULL &&
1113 focused->window->needs_take_focus &&
1114 focused->window->doesnt_accept_focus) {
1115 DLOG("Updating focus by sending WM_TAKE_FOCUS to window 0x%08x (focused: %p / %s)\n",
1116 to_focus, focused, focused->name);
1117 send_take_focus(to_focus, last_timestamp);
1119 ewmh_update_active_window((con_has_managed_window(focused) ? focused->window->id : XCB_WINDOW_NONE));
1121 if (to_focus != last_focused && is_con_attached(focused))
1122 ipc_send_window_event("focus", focused);
1124 DLOG("Updating focus (focused: %p / %s) to X11 window 0x%08x\n", focused, focused->name, to_focus);
1125 /* We remove XCB_EVENT_MASK_FOCUS_CHANGE from the event mask to get
1126 * no focus change events for our own focus changes. We only want
1127 * these generated by the clients. */
1128 if (focused->window != NULL) {
1129 values[0] = CHILD_EVENT_MASK & ~(XCB_EVENT_MASK_FOCUS_CHANGE);
1130 xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values);
1132 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, to_focus, last_timestamp);
1133 if (focused->window != NULL) {
1134 values[0] = CHILD_EVENT_MASK;
1135 xcb_change_window_attributes(conn, focused->window->id, XCB_CW_EVENT_MASK, values);
1138 ewmh_update_active_window((con_has_managed_window(focused) ? focused->window->id : XCB_WINDOW_NONE));
1140 if (to_focus != XCB_NONE && to_focus != last_focused && focused->window != NULL && is_con_attached(focused))
1141 ipc_send_window_event("focus", focused);
1144 focused_id = last_focused = to_focus;
1148 if (focused_id == XCB_NONE) {
1149 /* If we still have no window to focus, we focus the EWMH window instead. We use this rather than the
1150 * root window in order to avoid an X11 fallback mechanism causing a ghosting effect (see #1378). */
1151 DLOG("Still no window focused, better set focus to the EWMH support window (%d)\n", ewmh_window);
1152 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, ewmh_window, last_timestamp);
1153 ewmh_update_active_window(XCB_WINDOW_NONE);
1154 focused_id = ewmh_window;
1158 DLOG("ENDING CHANGES\n");
1160 /* Disable EnterWindow events for windows which will be unmapped in
1161 * x_push_node_unmaps() now. Unmapping windows happens when switching
1162 * workspaces. We want to avoid getting EnterNotifies during that phase
1163 * because they would screw up our focus. One of these cases is having a
1164 * stack with two windows. If the first window is focused and gets
1165 * unmapped, the second one appears under the cursor and therefore gets an
1166 * EnterNotify event. */
1167 values[0] = FRAME_EVENT_MASK & ~XCB_EVENT_MASK_ENTER_WINDOW;
1168 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1169 if (!state->unmap_now)
1171 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);
1174 /* Push all pending unmaps */
1175 x_push_node_unmaps(con);
1177 /* save the current stack as old stack */
1178 CIRCLEQ_FOREACH(state, &state_head, state) {
1179 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
1180 CIRCLEQ_INSERT_TAIL(&old_state_head, state, old_state);
1182 //CIRCLEQ_FOREACH(state, &old_state_head, old_state) {
1183 // DLOG("old stack: 0x%08x\n", state->id);
1190 * Raises the specified container in the internal stack of X windows. The
1191 * next call to x_push_changes() will make the change visible in X11.
1194 void x_raise_con(Con *con) {
1196 state = state_for_frame(con->frame.id);
1197 //DLOG("raising in new stack: %p / %s / %s / xid %08x\n", con, con->name, con->window ? con->window->name_json : "", state->id);
1199 CIRCLEQ_REMOVE(&state_head, state, state);
1200 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
1204 * Sets the WM_NAME property (so, no UTF8, but used only for debugging anyways)
1205 * of the given name. Used for properly tagging the windows for easily spotting
1206 * i3 windows in xwininfo -root -all.
1209 void x_set_name(Con *con, const char *name) {
1210 struct con_state *state;
1212 if ((state = state_for_frame(con->frame.id)) == NULL) {
1213 ELOG("window state not found\n");
1218 state->name = sstrdup(name);
1222 * Set up the I3_SHMLOG_PATH atom.
1225 void update_shmlog_atom() {
1226 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root,
1227 A_I3_SHMLOG_PATH, A_UTF8_STRING, 8,
1228 strlen(shmlogname), shmlogname);
1232 * Sets up i3 specific atoms (I3_SOCKET_PATH and I3_CONFIG_PATH)
1235 void x_set_i3_atoms(void) {
1236 pid_t pid = getpid();
1237 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_SOCKET_PATH, A_UTF8_STRING, 8,
1238 (current_socketpath == NULL ? 0 : strlen(current_socketpath)),
1239 current_socketpath);
1240 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_PID, XCB_ATOM_CARDINAL, 32, 1, &pid);
1241 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, root, A_I3_CONFIG_PATH, A_UTF8_STRING, 8,
1242 strlen(current_configpath), current_configpath);
1243 update_shmlog_atom();
1247 * Set warp_to coordinates. This will trigger on the next call to
1251 void x_set_warp_to(Rect *rect) {
1252 if (config.mouse_warping != POINTER_WARPING_NONE)
1257 * Applies the given mask to the event mask of every i3 window decoration X11
1258 * window. This is useful to disable EnterNotify while resizing so that focus
1262 void x_mask_event_mask(uint32_t mask) {
1263 uint32_t values[] = {FRAME_EVENT_MASK & mask};
1266 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
1268 xcb_change_window_attributes(conn, state->id, XCB_CW_EVENT_MASK, values);