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 {
22 /* For reparenting, we have a flag (need_reparent) and the X ID of the old
23 * frame this window was in. The latter is necessary because we need to
24 * ignore UnmapNotify events (by changing the window event mask). */
26 xcb_window_t old_frame;
35 CIRCLEQ_ENTRY(con_state) state;
36 CIRCLEQ_ENTRY(con_state) old_state;
39 CIRCLEQ_HEAD(state_head, con_state) state_head =
40 CIRCLEQ_HEAD_INITIALIZER(state_head);
42 CIRCLEQ_HEAD(old_state_head, con_state) old_state_head =
43 CIRCLEQ_HEAD_INITIALIZER(old_state_head);
46 * Returns the container state for the given frame. This function always
47 * returns a container state (otherwise, there is a bug in the code and the
48 * container state of a container for which x_con_init() was not called was
52 static con_state *state_for_frame(xcb_window_t window) {
54 CIRCLEQ_FOREACH(state, &state_head, state)
55 if (state->id == window)
58 /* TODO: better error handling? */
59 ELOG("No state found\n");
65 * Initializes the X11 part for the given container. Called exactly once for
66 * every container from con_new().
69 void x_con_init(Con *con) {
70 /* TODO: maybe create the window when rendering first? we could then even
71 * get the initial geometry right */
76 /* our own frames should not be managed */
77 mask |= XCB_CW_OVERRIDE_REDIRECT;
80 /* We want to know when… */
81 mask |= XCB_CW_EVENT_MASK;
82 values[1] = FRAME_EVENT_MASK;
84 Rect dims = { -15, -15, 10, 10 };
85 con->frame = create_window(conn, dims, XCB_WINDOW_CLASS_INPUT_OUTPUT, -1, false, mask, values);
86 con->gc = xcb_generate_id(conn);
87 xcb_create_gc(conn, con->gc, con->frame, 0, 0);
89 struct con_state *state = scalloc(sizeof(struct con_state));
90 state->id = con->frame;
91 state->mapped = false;
92 state->initial = true;
93 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
94 CIRCLEQ_INSERT_HEAD(&old_state_head, state, old_state);
95 LOG("adding new state for window id 0x%08x\n", state->id);
99 * Re-initializes the associated X window state for this container. You have
100 * to call this when you assign a client to an empty container to ensure that
101 * its state gets updated correctly.
104 void x_reinit(Con *con) {
105 struct con_state *state;
107 if ((state = state_for_frame(con->frame)) == NULL) {
108 ELOG("window state not found\n");
112 LOG("resetting state %p to initial\n", state);
113 state->initial = true;
114 memset(&(state->window_rect), 0, sizeof(Rect));
118 * Reparents the child window of the given container (necessary for sticky
119 * containers). The reparenting happens in the next call of x_push_changes().
122 void x_reparent_child(Con *con, Con *old) {
123 struct con_state *state;
124 if ((state = state_for_frame(con->frame)) == NULL) {
125 ELOG("window state for con not found\n");
129 state->need_reparent = true;
130 state->old_frame = old->frame;
134 * Moves a child window from Container src to Container dest.
137 void x_move_win(Con *src, Con *dest) {
138 struct con_state *state_src, *state_dest;
140 if ((state_src = state_for_frame(src->frame)) == NULL) {
141 ELOG("window state for src not found\n");
145 if ((state_dest = state_for_frame(dest->frame)) == NULL) {
146 ELOG("window state for dest not found\n");
151 memset(&zero, 0, sizeof(Rect));
152 if (memcmp(&(state_dest->window_rect), &(zero), sizeof(Rect)) == 0) {
153 memcpy(&(state_dest->window_rect), &(state_src->window_rect), sizeof(Rect));
154 LOG("COPYING RECT\n");
159 * Kills the window decoration associated with the given container.
162 void x_con_kill(Con *con) {
165 xcb_destroy_window(conn, con->frame);
166 state = state_for_frame(con->frame);
167 CIRCLEQ_REMOVE(&state_head, state, state);
168 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
172 * Returns true if the client supports the given protocol atom (like WM_DELETE_WINDOW)
175 static bool window_supports_protocol(xcb_window_t window, xcb_atom_t atom) {
176 xcb_get_property_cookie_t cookie;
177 xcb_get_wm_protocols_reply_t protocols;
180 cookie = xcb_get_wm_protocols_unchecked(conn, window, atoms[WM_PROTOCOLS]);
181 if (xcb_get_wm_protocols_reply(conn, cookie, &protocols, NULL) != 1)
184 /* Check if the client’s protocols have the requested atom set */
185 for (uint32_t i = 0; i < protocols.atoms_len; i++)
186 if (protocols.atoms[i] == atom)
189 xcb_get_wm_protocols_reply_wipe(&protocols);
195 * Kills the given X11 window using WM_DELETE_WINDOW (if supported).
198 void x_window_kill(xcb_window_t window) {
199 /* if this window does not support WM_DELETE_WINDOW, we kill it the hard way */
200 if (!window_supports_protocol(window, atoms[WM_DELETE_WINDOW])) {
201 LOG("Killing window the hard way\n");
202 xcb_kill_client(conn, window);
206 xcb_client_message_event_t ev;
208 memset(&ev, 0, sizeof(xcb_client_message_event_t));
210 ev.response_type = XCB_CLIENT_MESSAGE;
212 ev.type = atoms[WM_PROTOCOLS];
214 ev.data.data32[0] = atoms[WM_DELETE_WINDOW];
215 ev.data.data32[1] = XCB_CURRENT_TIME;
217 LOG("Sending WM_DELETE to the client\n");
218 xcb_send_event(conn, false, window, XCB_EVENT_MASK_NO_EVENT, (char*)&ev);
223 * Draws the decoration of the given container onto its parent.
226 void x_draw_decoration(Con *con) {
227 /* This code needs to run for:
229 * • non-leaf containers which are in a stacking container
231 * It does not need to run for:
232 * • floating containers (they don’t have a decoration)
234 if ((!con_is_leaf(con) && con->parent->layout != L_STACKED) ||
235 con->type == CT_FLOATING_CON)
237 DLOG("decoration should be rendered for con %p\n", con);
239 /* 1: find out which colors to use */
240 struct Colortriple *color;
242 color = &config.client.urgent;
243 else if (con == focused)
244 color = &config.client.focused;
245 else if (con == TAILQ_FIRST(&(con->parent->focus_head)))
246 color = &config.client.focused_inactive;
248 color = &config.client.unfocused;
250 Con *parent = con->parent;
251 int border_style = con_border_style(con);
253 /* 2: draw a rectangle in border color around the client */
254 if (border_style != BS_NONE && con_is_leaf(con)) {
255 Rect br = con_border_style_rect(con);
256 Rect *r = &(con->rect);
258 DLOG("con->rect spans %d x %d\n", con->rect.width, con->rect.height);
259 DLOG("border_rect spans (%d, %d) with %d x %d\n", border_rect.x, border_rect.y, border_rect.width, border_rect.height);
260 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);
263 /* These rectangles represents the border around the child window
264 * (left, bottom and right part). We don’t just fill the whole
265 * rectangle because some childs are not freely resizable and we want
266 * their background color to "shine through". */
267 xcb_change_gc_single(conn, con->gc, XCB_GC_FOREGROUND, color->background);
268 xcb_rectangle_t borders[] = {
269 { 0, 0, br.x, r->height },
270 { 0, r->height + br.height + br.y, r->width, r->height },
271 { r->width + br.width + br.x, 0, r->width, r->height }
273 xcb_poly_fill_rectangle(conn, con->frame, con->gc, 3, borders);
274 /* 1pixel border needs an additional line at the top */
275 if (border_style == BS_1PIXEL) {
276 xcb_rectangle_t topline = { br.x, 0, con->rect.width + br.width + br.x, br.y };
277 xcb_poly_fill_rectangle(conn, con->frame, con->gc, 1, &topline);
281 /* if this is a borderless/1pixel window, we don’t * need to render the
283 if (border_style != BS_NORMAL) {
284 DLOG("border style not BS_NORMAL, aborting rendering of decoration\n");
288 /* 3: paint the bar */
289 xcb_change_gc_single(conn, parent->gc, XCB_GC_FOREGROUND, color->background);
290 xcb_rectangle_t drect = { con->deco_rect.x, con->deco_rect.y, con->deco_rect.width, con->deco_rect.height };
291 xcb_poly_fill_rectangle(conn, parent->frame, parent->gc, 1, &drect);
293 /* 4: draw the two lines in border color */
294 xcb_draw_line(conn, parent->frame, parent->gc, color->border,
295 con->deco_rect.x, /* x */
296 con->deco_rect.y, /* y */
297 con->deco_rect.x + con->deco_rect.width, /* to_x */
298 con->deco_rect.y); /* to_y */
299 xcb_draw_line(conn, parent->frame, parent->gc, color->border,
300 con->deco_rect.x, /* x */
301 con->deco_rect.y + con->deco_rect.height - 1, /* y */
302 con->deco_rect.x + con->deco_rect.width, /* to_x */
303 con->deco_rect.y + con->deco_rect.height - 1); /* to_y */
305 /* 5: draw the title */
306 i3Font *font = load_font(conn, config.font);
307 uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
308 uint32_t values[] = { color->text, color->background, font->id };
309 xcb_change_gc(conn, parent->gc, mask, values);
310 int text_offset_y = font->height + (con->deco_rect.height - font->height) / 2 - 1;
312 struct Window *win = con->window;
313 if (win == NULL || win->name_x == NULL) {
314 /* this is a non-leaf container, we need to make up a good description */
315 // TODO: use a good description instead of just "another container"
318 strlen("another container"),
321 con->deco_rect.x + 2,
322 con->deco_rect.y + text_offset_y,
328 int indent_level = 0,
330 Con *il_parent = con->parent;
331 if (il_parent->type != L_STACKED) {
333 DLOG("il_parent = %p, layout = %d\n", il_parent, il_parent->layout);
334 if (il_parent->layout == L_STACKED)
336 if (il_parent->type == CT_WORKSPACE)
338 il_parent = il_parent->parent;
342 DLOG("indent_level = %d, indent_mult = %d\n", indent_level, indent_mult);
343 int indent_px = (indent_level * 5) * indent_mult;
345 if (win->uses_net_wm_name)
351 con->deco_rect.x + 2 + indent_px,
352 con->deco_rect.y + text_offset_y,
353 (xcb_char2b_t*)win->name_x
361 con->deco_rect.x + 2 + indent_px,
362 con->deco_rect.y + text_offset_y,
368 * This function pushes the properties of each node of the layout tree to
369 * X11 if they have changed (like the map state, position of the window, …).
370 * It recursively traverses all children of the given node.
373 static void x_push_node(Con *con) {
376 Rect rect = con->rect;
378 LOG("Pushing changes for node %p / %s\n", con, con->name);
379 state = state_for_frame(con->frame);
381 if (state->name != NULL) {
382 DLOG("pushing name %s for con %p\n", state->name, con);
384 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->frame,
385 WM_NAME, STRING, 8, strlen(state->name), state->name);
389 if (con->window == NULL) {
390 /* Calculate the height of all window decorations which will be drawn on to
392 uint32_t max_y = 0, max_height = 0;
393 TAILQ_FOREACH(current, &(con->nodes_head), nodes) {
394 DLOG("Child's decoration is %d x %d, from (%d, %d)\n",
395 current->deco_rect.width, current->deco_rect.height,
396 current->deco_rect.x, current->deco_rect.y);
397 Rect *dr = &(current->deco_rect);
398 if (dr->y >= max_y && dr->height >= max_height) {
400 max_height = dr->height;
403 DLOG("bottom of decorations is %d\n", max_y + max_height);
404 rect.height = max_y + max_height;
405 if (rect.height == 0) {
406 DLOG("Unmapping container because it does not contain anything atm.\n");
411 /* reparent the child window (when the window was moved due to a sticky
413 if (state->need_reparent && con->window != NULL) {
414 LOG("Reparenting child window\n");
416 /* Temporarily set the event masks to XCB_NONE so that we won’t get
417 * UnmapNotify events (otherwise the handler would close the container).
418 * These events are generated automatically when reparenting. */
419 uint32_t values[] = { XCB_NONE };
420 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
421 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
423 xcb_reparent_window(conn, con->window->id, con->frame, 0, 0);
425 values[0] = FRAME_EVENT_MASK;
426 xcb_change_window_attributes(conn, state->old_frame, XCB_CW_EVENT_MASK, values);
427 values[0] = CHILD_EVENT_MASK;
428 xcb_change_window_attributes(conn, con->window->id, XCB_CW_EVENT_MASK, values);
430 state->old_frame = XCB_NONE;
431 state->need_reparent = false;
434 DLOG("ignore_unmap for reparenting of con %p (win 0x%08x) is now %d\n",
435 con, con->window->id, con->ignore_unmap);
438 /* map/unmap if map state changed, also ensure that the child window
439 * is changed if we are mapped *and* in initial state (meaning the
440 * container was empty before, but now got a child) */
441 if (state->mapped != con->mapped || (con->mapped && state->initial)) {
443 xcb_void_cookie_t cookie;
444 if (con->window != NULL) {
445 /* Set WM_STATE_WITHDRAWN, it seems like Java apps need it */
446 long data[] = { XCB_WM_STATE_WITHDRAWN, XCB_NONE };
447 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
448 atoms[WM_STATE], atoms[WM_STATE], 32, 2, data);
451 cookie = xcb_unmap_window(conn, con->frame);
452 LOG("unmapping container (serial %d)\n", cookie.sequence);
453 /* we need to increase ignore_unmap for this container (if it contains a window) and for every window "under" this one which contains a window */
454 if (con->window != NULL) {
456 DLOG("ignore_unmap for con %p (frame 0x%08x) now %d\n", con, con->frame, con->ignore_unmap);
458 /* Ignore enter_notifies which are generated when unmapping */
459 add_ignore_event(cookie.sequence);
461 xcb_void_cookie_t cookie;
463 if (con->window != NULL) {
464 /* Set WM_STATE_NORMAL because GTK applications don’t want to
465 * drag & drop if we don’t. Also, xprop(1) needs it. */
466 long data[] = { XCB_WM_STATE_NORMAL, XCB_NONE };
467 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
468 atoms[WM_STATE], atoms[WM_STATE], 32, 2, data);
471 if (state->initial && con->window != NULL) {
472 cookie = xcb_map_window(conn, con->window->id);
473 LOG("mapping child window (serial %d)\n", cookie.sequence);
474 /* Ignore enter_notifies which are generated when mapping */
475 add_ignore_event(cookie.sequence);
478 cookie = xcb_map_window(conn, con->frame);
479 LOG("mapping container (serial %d)\n", cookie.sequence);
480 /* Ignore enter_notifies which are generated when mapping */
481 add_ignore_event(cookie.sequence);
483 state->mapped = con->mapped;
486 bool fake_notify = false;
487 /* set new position if rect changed */
488 if (memcmp(&(state->rect), &rect, sizeof(Rect)) != 0) {
489 LOG("setting rect (%d, %d, %d, %d)\n", rect.x, rect.y, rect.width, rect.height);
490 xcb_set_window_rect(conn, con->frame, rect);
491 memcpy(&(state->rect), &rect, sizeof(Rect));
495 /* dito, but for child windows */
496 if (con->window != NULL &&
497 memcmp(&(state->window_rect), &(con->window_rect), sizeof(Rect)) != 0) {
498 LOG("setting window rect (%d, %d, %d, %d)\n",
499 con->window_rect.x, con->window_rect.y, con->window_rect.width, con->window_rect.height);
500 xcb_set_window_rect(conn, con->window->id, con->window_rect);
501 memcpy(&(state->rect), &(con->rect), sizeof(Rect));
506 LOG("Sending fake configure notify\n");
507 fake_absolute_configure_notify(con);
510 /* handle all children and floating windows of this node */
511 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
512 x_push_node(current);
514 TAILQ_FOREACH(current, &(con->floating_head), floating_windows)
515 x_push_node(current);
517 if (con->type != CT_ROOT && con->type != CT_OUTPUT)
518 x_draw_decoration(con);
522 * Pushes all changes (state of each node, see x_push_node() and the window
526 void x_push_changes(Con *con) {
529 LOG("\n\n PUSHING CHANGES\n\n");
532 LOG("-- PUSHING WINDOW STACK --\n");
533 bool order_changed = false;
534 /* X11 correctly represents the stack if we push it from bottom to top */
535 CIRCLEQ_FOREACH_REVERSE(state, &state_head, state) {
536 LOG("stack: 0x%08x\n", state->id);
537 con_state *prev = CIRCLEQ_PREV(state, state);
538 con_state *old_prev = CIRCLEQ_PREV(state, old_state);
539 if (prev != old_prev)
540 order_changed = true;
541 if ((state->initial || order_changed) && prev != CIRCLEQ_END(&state_head)) {
542 LOG("Stacking 0x%08x above 0x%08x\n", prev->id, state->id);
544 mask |= XCB_CONFIG_WINDOW_SIBLING;
545 mask |= XCB_CONFIG_WINDOW_STACK_MODE;
546 uint32_t values[] = {state->id, XCB_STACK_MODE_ABOVE};
548 xcb_configure_window(conn, prev->id, mask, values);
550 state->initial = false;
553 xcb_window_t to_focus = focused->frame;
554 if (focused->window != NULL)
555 to_focus = focused->window->id;
557 if (focused_id != to_focus) {
558 LOG("Updating focus (focused: %p / %s)\n", focused, focused->name);
559 xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, to_focus, XCB_CURRENT_TIME);
563 LOG("\n\n ENDING CHANGES\n\n");
565 /* save the current stack as old stack */
566 CIRCLEQ_FOREACH(state, &state_head, state) {
567 CIRCLEQ_REMOVE(&old_state_head, state, old_state);
568 CIRCLEQ_INSERT_TAIL(&old_state_head, state, old_state);
570 CIRCLEQ_FOREACH(state, &old_state_head, old_state) {
571 LOG("old stack: 0x%08x\n", state->id);
576 * Raises the specified container in the internal stack of X windows. The
577 * next call to x_push_changes() will make the change visible in X11.
580 void x_raise_con(Con *con) {
582 LOG("raising in new stack: %p / %s\n", con, con->name);
583 state = state_for_frame(con->frame);
585 LOG("found state entry, moving to top\n");
586 CIRCLEQ_REMOVE(&state_head, state, state);
587 CIRCLEQ_INSERT_HEAD(&state_head, state, state);
591 * Sets the WM_NAME property (so, no UTF8, but used only for debugging anyways)
592 * of the given name. Used for properly tagging the windows for easily spotting
593 * i3 windows in xwininfo -root -all.
596 void x_set_name(Con *con, const char *name) {
597 struct con_state *state;
599 if ((state = state_for_frame(con->frame)) == NULL) {
600 ELOG("window state not found\n");
605 state->name = sstrdup(name);