2 * vim:ts=4:sw=4:expandtab
7 /* Stores the X11 window ID of the currently focused window */
8 static xcb_window_t focused_id = XCB_NONE;
11 * Describes the X11 state we may modify (map state, position, window stack).
12 * There is one entry per container. The state represents the current situation
13 * as X11 sees it (with the exception of the order in the state_head CIRCLEQ,
14 * which represents the order that will be pushed to X11, while old_state_head
15 * represents the current order). It will be updated in x_push_changes().
18 typedef struct con_state {
23 /* For reparenting, we have a flag (need_reparent) and the X ID of the old
24 * frame this window was in. The latter is necessary because we need to
25 * ignore UnmapNotify events (by changing the window event mask). */
27 xcb_window_t old_frame;
36 CIRCLEQ_ENTRY(con_state) state;
37 CIRCLEQ_ENTRY(con_state) old_state;
40 CIRCLEQ_HEAD(state_head, con_state) state_head =
41 CIRCLEQ_HEAD_INITIALIZER(state_head);
43 CIRCLEQ_HEAD(old_state_head, con_state) old_state_head =
44 CIRCLEQ_HEAD_INITIALIZER(old_state_head);
47 * Returns the container state for the given frame. This function always
48 * returns a container state (otherwise, there is a bug in the code and the
49 * container state of a container for which x_con_init() was not called was
53 static con_state *state_for_frame(xcb_window_t window) {
55 CIRCLEQ_FOREACH(state, &state_head, state)
56 if (state->id == window)
59 /* TODO: better error handling? */
60 ELOG("No state found\n");
66 * Initializes the X11 part for the given container. Called exactly once for
67 * every container from con_new().
70 void x_con_init(Con *con) {
71 /* TODO: maybe create the window when rendering first? we could then even
72 * get the initial geometry right */
77 /* our own frames should not be managed */
78 mask |= XCB_CW_OVERRIDE_REDIRECT;
81 /* We want to know when… */
82 mask |= XCB_CW_EVENT_MASK;
83 values[1] = FRAME_EVENT_MASK;
85 Rect dims = { -15, -15, 10, 10 };
86 con->frame = create_window(conn, dims, XCB_WINDOW_CLASS_INPUT_OUTPUT, XCURSOR_CURSOR_POINTER, false, mask, values);
87 con->gc = xcb_generate_id(conn);
88 xcb_create_gc(conn, con->gc, con->frame, 0, 0);
90 struct con_state *state = scalloc(sizeof(struct con_state));
91 state->id = con->frame;
92 state->mapped = false;
93 state->initial = true;
94 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
95 CIRCLEQ_INSERT_HEAD(&old_state_head, state, old_state);
96 LOG("adding new state for window id 0x%08x\n", state->id);
100 * Re-initializes the associated X window state for this container. You have
101 * to call this when you assign a client to an empty container to ensure that
102 * its state gets updated correctly.
105 void x_reinit(Con *con) {
106 struct con_state *state;
108 if ((state = state_for_frame(con->frame)) == NULL) {
109 ELOG("window state not found\n");
113 LOG("resetting state %p to initial\n", state);
114 state->initial = true;
115 state->child_mapped = false;
116 memset(&(state->window_rect), 0, sizeof(Rect));
120 * Reparents the child window of the given container (necessary for sticky
121 * containers). The reparenting happens in the next call of x_push_changes().
124 void x_reparent_child(Con *con, Con *old) {
125 struct con_state *state;
126 if ((state = state_for_frame(con->frame)) == NULL) {
127 ELOG("window state for con not found\n");
131 state->need_reparent = true;
132 state->old_frame = old->frame;
136 * Moves a child window from Container src to Container dest.
139 void x_move_win(Con *src, Con *dest) {
140 struct con_state *state_src, *state_dest;
142 if ((state_src = state_for_frame(src->frame)) == NULL) {
143 ELOG("window state for src not found\n");
147 if ((state_dest = state_for_frame(dest->frame)) == NULL) {
148 ELOG("window state for dest not found\n");
153 memset(&zero, 0, sizeof(Rect));
154 if (memcmp(&(state_dest->window_rect), &(zero), sizeof(Rect)) == 0) {
155 memcpy(&(state_dest->window_rect), &(state_src->window_rect), sizeof(Rect));
156 LOG("COPYING RECT\n");
161 * Kills the window decoration associated with the given container.
164 void x_con_kill(Con *con) {
167 xcb_destroy_window(conn, con->frame);
168 state = state_for_frame(con->frame);
169 CIRCLEQ_REMOVE(&state_head, state, state);
170 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
172 /* Invalidate focused_id to correctly focus new windows with the same ID */
173 focused_id = XCB_NONE;
177 * Returns true if the client supports the given protocol atom (like WM_DELETE_WINDOW)
180 static bool window_supports_protocol(xcb_window_t window, xcb_atom_t atom) {
181 xcb_get_property_cookie_t cookie;
182 xcb_get_wm_protocols_reply_t protocols;
185 cookie = xcb_get_wm_protocols_unchecked(conn, window, atoms[WM_PROTOCOLS]);
186 if (xcb_get_wm_protocols_reply(conn, cookie, &protocols, NULL) != 1)
189 /* Check if the client’s protocols have the requested atom set */
190 for (uint32_t i = 0; i < protocols.atoms_len; i++)
191 if (protocols.atoms[i] == atom)
194 xcb_get_wm_protocols_reply_wipe(&protocols);
200 * Kills the given X11 window using WM_DELETE_WINDOW (if supported).
203 void x_window_kill(xcb_window_t window) {
204 /* if this window does not support WM_DELETE_WINDOW, we kill it the hard way */
205 if (!window_supports_protocol(window, atoms[WM_DELETE_WINDOW])) {
206 LOG("Killing window the hard way\n");
207 xcb_kill_client(conn, window);
211 xcb_client_message_event_t ev;
213 memset(&ev, 0, sizeof(xcb_client_message_event_t));
215 ev.response_type = XCB_CLIENT_MESSAGE;
217 ev.type = atoms[WM_PROTOCOLS];
219 ev.data.data32[0] = atoms[WM_DELETE_WINDOW];
220 ev.data.data32[1] = XCB_CURRENT_TIME;
222 LOG("Sending WM_DELETE to the client\n");
223 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)&ev);
228 * Draws the decoration of the given container onto its parent.
231 void x_draw_decoration(Con *con) {
232 /* This code needs to run for:
234 * • non-leaf containers which are in a stacking container
236 * It does not need to run for:
237 * • floating containers (they don’t have a decoration)
239 if ((!con_is_leaf(con) && con->parent->layout != L_STACKED) ||
240 con->type == CT_FLOATING_CON)
242 DLOG("decoration should be rendered for con %p\n", con);
244 /* 1: find out which colors to use */
245 struct Colortriple *color;
247 color = &config.client.urgent;
248 else if (con == focused)
249 color = &config.client.focused;
250 else if (con == TAILQ_FIRST(&(con->parent->focus_head)))
251 color = &config.client.focused_inactive;
253 color = &config.client.unfocused;
255 Con *parent = con->parent;
256 int border_style = con_border_style(con);
258 /* 2: draw a rectangle in border color around the client */
259 if (border_style != BS_NONE && con_is_leaf(con)) {
260 Rect br = con_border_style_rect(con);
261 Rect *r = &(con->rect);
263 DLOG("con->rect spans %d x %d\n", con->rect.width, con->rect.height);
264 DLOG("border_rect spans (%d, %d) with %d x %d\n", border_rect.x, border_rect.y, border_rect.width, border_rect.height);
265 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);
268 /* These rectangles represents the border around the child window
269 * (left, bottom and right part). We don’t just fill the whole
270 * rectangle because some childs are not freely resizable and we want
271 * their background color to "shine through". */
272 xcb_change_gc_single(conn, con->gc, XCB_GC_FOREGROUND, color->background);
273 xcb_rectangle_t borders[] = {
274 { 0, 0, br.x, r->height },
275 { 0, r->height + br.height + br.y, r->width, r->height },
276 { r->width + br.width + br.x, 0, r->width, r->height }
278 xcb_poly_fill_rectangle(conn, con->frame, con->gc, 3, borders);
279 /* 1pixel border needs an additional line at the top */
280 if (border_style == BS_1PIXEL) {
281 xcb_rectangle_t topline = { br.x, 0, con->rect.width + br.width + br.x, br.y };
282 xcb_poly_fill_rectangle(conn, con->frame, con->gc, 1, &topline);
286 /* if this is a borderless/1pixel window, we don’t * need to render the
288 if (border_style != BS_NORMAL) {
289 DLOG("border style not BS_NORMAL, aborting rendering of decoration\n");
293 /* 3: paint the bar */
294 xcb_change_gc_single(conn, parent->gc, XCB_GC_FOREGROUND, color->background);
295 xcb_rectangle_t drect = { con->deco_rect.x, con->deco_rect.y, con->deco_rect.width, con->deco_rect.height };
296 xcb_poly_fill_rectangle(conn, parent->frame, parent->gc, 1, &drect);
298 /* 4: draw the two lines in border color */
299 xcb_draw_line(conn, parent->frame, parent->gc, color->border,
300 con->deco_rect.x, /* x */
301 con->deco_rect.y, /* y */
302 con->deco_rect.x + con->deco_rect.width, /* to_x */
303 con->deco_rect.y); /* to_y */
304 xcb_draw_line(conn, parent->frame, parent->gc, color->border,
305 con->deco_rect.x, /* x */
306 con->deco_rect.y + con->deco_rect.height - 1, /* y */
307 con->deco_rect.x + con->deco_rect.width, /* to_x */
308 con->deco_rect.y + con->deco_rect.height - 1); /* to_y */
310 /* 5: draw the title */
311 i3Font *font = load_font(conn, config.font);
312 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
313 uint32_t values[] = { color->text, color->background, font->id };
314 xcb_change_gc(conn, parent->gc, mask, values);
315 int text_offset_y = font->height + (con->deco_rect.height - font->height) / 2 - 1;
317 struct Window *win = con->window;
318 if (win == NULL || win->name_x == NULL) {
319 /* this is a non-leaf container, we need to make up a good description */
320 // TODO: use a good description instead of just "another container"
323 strlen("another container"),
326 con->deco_rect.x + 2,
327 con->deco_rect.y + text_offset_y,
333 int indent_level = 0,
335 Con *il_parent = con->parent;
336 if (il_parent->type != L_STACKED) {
338 DLOG("il_parent = %p, layout = %d\n", il_parent, il_parent->layout);
339 if (il_parent->layout == L_STACKED)
341 if (il_parent->type == CT_WORKSPACE)
343 il_parent = il_parent->parent;
347 DLOG("indent_level = %d, indent_mult = %d\n", indent_level, indent_mult);
348 int indent_px = (indent_level * 5) * indent_mult;
350 if (win->uses_net_wm_name)
356 con->deco_rect.x + 2 + indent_px,
357 con->deco_rect.y + text_offset_y,
358 (xcb_char2b_t*)win->name_x
366 con->deco_rect.x + 2 + indent_px,
367 con->deco_rect.y + text_offset_y,
373 * This function pushes the properties of each node of the layout tree to
374 * X11 if they have changed (like the map state, position of the window, …).
375 * It recursively traverses all children of the given node.
378 static void x_push_node(Con *con) {
381 Rect rect = con->rect;
383 LOG("Pushing changes for node %p / %s\n", con, con->name);
384 state = state_for_frame(con->frame);
386 if (state->name != NULL) {
387 DLOG("pushing name %s for con %p\n", state->name, con);
389 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->frame,
390 WM_NAME, STRING, 8, strlen(state->name), state->name);
394 if (con->window == NULL) {
395 /* Calculate the height of all window decorations which will be drawn on to
397 uint32_t max_y = 0, max_height = 0;
398 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
399 Rect *dr = &(current->deco_rect);
400 if (dr->y >= max_y && dr->height >= max_height) {
402 max_height = dr->height;
405 rect.height = max_y + max_height;
406 if (rect.height == 0) {
407 DLOG("Unmapping container because it does not contain anything atm.\n");
412 /* reparent the child window (when the window was moved due to a sticky
414 if (state->need_reparent && con->window != NULL) {
415 LOG("Reparenting child window\n");
417 /* Temporarily set the event masks to XCB_NONE so that we won’t get
418 * UnmapNotify events (otherwise the handler would close the container).
419 * These events are generated automatically when reparenting. */
420 uint32_t values[] = { XCB_NONE };
421 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
422 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
424 xcb_reparent_window(conn, con->window->id, con->frame, 0, 0);
426 values[0] = FRAME_EVENT_MASK;
427 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
428 values[0] = CHILD_EVENT_MASK;
429 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
431 state->old_frame = XCB_NONE;
432 state->need_reparent = false;
435 DLOG("ignore_unmap for reparenting of con %p (win 0x%08x) is now %d\n",
436 con, con->window->id, con->ignore_unmap);
439 bool fake_notify = false;
440 /* set new position if rect changed */
441 if (memcmp(&(state->rect), &rect, sizeof(Rect)) != 0) {
442 LOG("setting rect (%d, %d, %d, %d)\n", rect.x, rect.y, rect.width, rect.height);
443 xcb_set_window_rect(conn, con->frame, rect);
444 memcpy(&(state->rect), &rect, sizeof(Rect));
448 /* dito, but for child windows */
449 if (con->window != NULL &&
450 memcmp(&(state->window_rect), &(con->window_rect), sizeof(Rect)) != 0) {
451 LOG("setting window rect (%d, %d, %d, %d)\n",
452 con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
453 xcb_set_window_rect(conn, con->window->id, con->window_rect);
454 memcpy(&(state->window_rect), &(con->window_rect), sizeof(Rect));
458 /* Map if map state changed, also ensure that the child window
459 * is changed if we are mapped *and* in initial state (meaning the
460 * container was empty before, but now got a child). Unmaps are handled in
461 * x_push_node_unmaps(). */
462 if ((state->mapped != con->mapped || (con->mapped && state->initial)) &&
464 xcb_void_cookie_t cookie;
466 if (con->window != NULL) {
467 /* Set WM_STATE_NORMAL because GTK applications don’t want to
468 * drag & drop if we don’t. Also, xprop(1) needs it. */
469 long data[] = { XCB_WM_STATE_NORMAL, XCB_NONE };
470 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
471 atoms[WM_STATE], atoms[WM_STATE], 32, 2, data);
474 if (!state->child_mapped && con->window != NULL) {
475 cookie = xcb_map_window(conn, con->window->id);
476 LOG("mapping child window (serial %d)\n", cookie.sequence);
477 /* Ignore enter_notifies which are generated when mapping */
478 add_ignore_event(cookie.sequence);
479 state->child_mapped = true;
482 cookie = xcb_map_window(conn, con->frame);
483 LOG("mapping container (serial %d)\n", cookie.sequence);
484 /* Ignore enter_notifies which are generated when mapping */
485 add_ignore_event(cookie.sequence);
486 state->mapped = con->mapped;
490 LOG("Sending fake configure notify\n");
491 fake_absolute_configure_notify(con);
494 /* handle all children and floating windows of this node */
495 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
496 x_push_node(current);
498 TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
499 x_push_node(current);
501 if (con->type != CT_ROOT && con->type != CT_OUTPUT)
502 x_draw_decoration(con);
506 * Same idea as in x_push_node(), but this function only unmaps windows. It is
507 * necessary to split this up to handle new fullscreen clients properly: The
508 * new window needs to be mapped and focus needs to be set *before* the
509 * underlying windows are unmapped. Otherwise, focus will revert to the
510 * PointerRoot and will then be set to the new window, generating unnecessary
511 * FocusIn/FocusOut events.
514 static void x_push_node_unmaps(Con *con) {
518 LOG("Pushing changes (with unmaps) for node %p / %s\n", con, con->name);
519 state = state_for_frame(con->frame);
521 /* map/unmap if map state changed, also ensure that the child window
522 * is changed if we are mapped *and* in initial state (meaning the
523 * container was empty before, but now got a child) */
524 if ((state->mapped != con->mapped || (con->mapped && state->initial)) &&
526 xcb_void_cookie_t cookie;
527 if (con->window != NULL) {
528 /* Set WM_STATE_WITHDRAWN, it seems like Java apps need it */
529 long data[] = { XCB_WM_STATE_WITHDRAWN, XCB_NONE };
530 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
531 atoms[WM_STATE], atoms[WM_STATE], 32, 2, data);
534 cookie = xcb_unmap_window(conn, con->frame);
535 LOG("unmapping container (serial %d)\n", cookie.sequence);
536 /* we need to increase ignore_unmap for this container (if it
537 * contains a window) and for every window "under" this one which
538 * contains a window */
539 if (con->window != NULL) {
541 DLOG("ignore_unmap for con %p (frame 0x%08x) now %d\n", con, con->frame, con->ignore_unmap);
543 /* Ignore enter_notifies which are generated when unmapping */
544 add_ignore_event(cookie.sequence);
545 state->mapped = con->mapped;
548 /* handle all children and floating windows of this node */
549 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
550 x_push_node_unmaps(current);
552 TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
553 x_push_node_unmaps(current);
557 * Pushes all changes (state of each node, see x_push_node() and the window
561 void x_push_changes(Con *con) {
564 LOG("\n\n PUSHING CHANGES\n\n");
567 LOG("-- PUSHING WINDOW STACK --\n");
568 bool order_changed = false;
569 /* X11 correctly represents the stack if we push it from bottom to top */
570 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
571 LOG("stack: 0x%08x\n", state->id);
572 con_state *prev = CIRCLEQ_PREV(state, state);
573 con_state *old_prev = CIRCLEQ_PREV(state, old_state);
574 if (prev != old_prev)
575 order_changed = true;
576 if ((state->initial || order_changed) && prev != CIRCLEQ_END(&state_head)) {
577 LOG("Stacking 0x%08x above 0x%08x\n", prev->id, state->id);
579 mask |= XCB_CONFIG_WINDOW_SIBLING;
580 mask |= XCB_CONFIG_WINDOW_STACK_MODE;
581 uint32_t values[] = {state->id, XCB_STACK_MODE_ABOVE};
583 xcb_configure_window(conn, prev->id, mask, values);
585 state->initial = false;
588 xcb_window_t to_focus = focused->frame;
589 if (focused->window != NULL)
590 to_focus = focused->window->id;
592 DLOG("focused_id = 0x%08x, to_focus = 0x%08x\n", focused_id, to_focus);
593 if (focused_id != to_focus) {
594 if (!focused->mapped) {
595 DLOG("Not updating focus (to %p / %s), focused window is not mapped.\n", focused, focused->name);
597 LOG("Updating focus (focused: %p / %s)\n", focused, focused->name);
598 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, to_focus, XCB_CURRENT_TIME);
599 focused_id = to_focus;
604 LOG("\n\n ENDING CHANGES\n\n");
606 x_push_node_unmaps(con);
608 /* save the current stack as old stack */
609 CIRCLEQ_FOREACH(state, &state_head, state) {
610 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
611 CIRCLEQ_INSERT_TAIL(&old_state_head, state, old_state);
613 CIRCLEQ_FOREACH(state, &old_state_head, old_state) {
614 LOG("old stack: 0x%08x\n", state->id);
619 * Raises the specified container in the internal stack of X windows. The
620 * next call to x_push_changes() will make the change visible in X11.
623 void x_raise_con(Con *con) {
625 LOG("raising in new stack: %p / %s\n", con, con->name);
626 state = state_for_frame(con->frame);
628 CIRCLEQ_REMOVE(&state_head, state, state);
629 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
633 * Sets the WM_NAME property (so, no UTF8, but used only for debugging anyways)
634 * of the given name. Used for properly tagging the windows for easily spotting
635 * i3 windows in xwininfo -root -all.
638 void x_set_name(Con *con, const char *name) {
639 struct con_state *state;
641 if ((state = state_for_frame(con->frame)) == NULL) {
642 ELOG("window state not found\n");
647 state->name = sstrdup(name);