4 * i3 - an improved dynamic tiling window manager
6 * © 2009 Michael Stapelberg and contributors
8 * See file LICENSE for license information.
18 #include <xcb/xcb_atom.h>
19 #include <xcb/xcb_icccm.h>
21 #include <X11/XKBlib.h>
38 #include "workspace.h"
40 /* After mapping/unmapping windows, a notify event is generated. However, we don’t want it,
41 since it’d trigger an infinite loop of switching between the different windows when
42 changing workspaces */
43 static SLIST_HEAD(ignore_head, Ignore_Event) ignore_events;
45 static void add_ignore_event(const int sequence) {
46 struct Ignore_Event *event = smalloc(sizeof(struct Ignore_Event));
48 event->sequence = sequence;
49 event->added = time(NULL);
51 SLIST_INSERT_HEAD(&ignore_events, event, ignore_events);
55 * Checks if the given sequence is ignored and returns true if so.
58 static bool event_is_ignored(const int sequence) {
59 struct Ignore_Event *event;
60 time_t now = time(NULL);
61 for (event = SLIST_FIRST(&ignore_events); event != SLIST_END(&ignore_events);) {
62 if ((now - event->added) > 5) {
63 struct Ignore_Event *save = event;
64 event = SLIST_NEXT(event, ignore_events);
65 SLIST_REMOVE(&ignore_events, save, Ignore_Event, ignore_events);
67 } else event = SLIST_NEXT(event, ignore_events);
70 SLIST_FOREACH(event, &ignore_events, ignore_events) {
71 if (event->sequence == sequence) {
72 SLIST_REMOVE(&ignore_events, event, Ignore_Event, ignore_events);
82 * Due to bindings like Mode_switch + <a>, we need to bind some keys in XCB_GRAB_MODE_SYNC.
83 * Therefore, we just replay all key presses.
86 int handle_key_release(void *ignored, xcb_connection_t *conn, xcb_key_release_event_t *event) {
87 xcb_allow_events(conn, XCB_ALLOW_REPLAY_KEYBOARD, event->time);
93 * There was a key press. We compare this key code with our bindings table and pass
94 * the bound action to parse_command().
97 int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
98 LOG("Keypress %d, state raw = %d\n", event->detail, event->state);
100 /* Remove the numlock bit, all other bits are modifiers we can bind to */
101 uint16_t state_filtered = event->state & ~(xcb_numlock_mask | XCB_MOD_MASK_LOCK);
102 LOG("(removed numlock, state = %d)\n", state_filtered);
103 /* Only use the lower 8 bits of the state (modifier masks) so that mouse
104 * button masks are filtered out */
105 state_filtered &= 0xFF;
106 LOG("(removed upper 8 bits, state = %d)\n", state_filtered);
108 /* We need to get the keysym group (There are group 1 to group 4, each holding
109 two keysyms (without shift and with shift) using Xkb because X fails to
110 provide them reliably (it works in Xephyr, it does not in real X) */
112 if (XkbGetState(xkbdpy, XkbUseCoreKbd, &state) == Success && (state.group+1) == 2)
113 state_filtered |= BIND_MODE_SWITCH;
115 LOG("(checked mode_switch, state %d)\n", state_filtered);
117 /* Find the binding */
119 TAILQ_FOREACH(bind, &bindings, bindings) {
120 /* First compare the modifiers */
121 if (bind->mods != state_filtered)
124 /* If a symbol was specified by the user, we need to look in
125 * the array of translated keycodes for the event’s keycode */
126 if (bind->symbol != NULL) {
127 if (memmem(bind->translated_to,
128 bind->number_keycodes * sizeof(xcb_keycode_t),
129 &(event->detail), sizeof(xcb_keycode_t)) != NULL)
132 /* This case is easier: The user specified a keycode */
133 if (bind->keycode == event->detail)
138 /* No match? Then it was an actively grabbed key, that is with Mode_switch, and
139 the user did not press Mode_switch, so just pass it… */
140 if (bind == TAILQ_END(&bindings)) {
141 xcb_allow_events(conn, ReplayKeyboard, event->time);
146 parse_command(conn, bind->command);
147 if (state_filtered & BIND_MODE_SWITCH) {
148 LOG("Mode_switch -> allow_events(SyncKeyboard)\n");
149 xcb_allow_events(conn, SyncKeyboard, event->time);
156 * Called with coordinates of an enter_notify event or motion_notify event
157 * to check if the user crossed virtual screen boundaries and adjust the
158 * current workspace, if so.
161 static void check_crossing_screen_boundary(uint32_t x, uint32_t y) {
164 if ((screen = get_screen_containing(x, y)) == NULL) {
165 LOG("ERROR: No such screen\n");
168 if (screen == c_ws->screen)
171 c_ws->current_row = current_row;
172 c_ws->current_col = current_col;
173 c_ws = &workspaces[screen->current_workspace];
174 current_row = c_ws->current_row;
175 current_col = c_ws->current_col;
176 LOG("We're now on virtual screen number %d\n", screen->num);
180 * When the user moves the mouse pointer onto a window, this callback gets called.
183 int handle_enter_notify(void *ignored, xcb_connection_t *conn, xcb_enter_notify_event_t *event) {
184 LOG("enter_notify for %08x, mode = %d, detail %d, serial %d\n", event->event, event->mode, event->detail, event->sequence);
185 if (event->mode != XCB_NOTIFY_MODE_NORMAL) {
186 LOG("This was not a normal notify, ignoring\n");
189 /* Some events are not interesting, because they were not generated actively by the
190 user, but by reconfiguration of windows */
191 if (event_is_ignored(event->sequence))
194 /* This was either a focus for a client’s parent (= titlebar)… */
195 Client *client = table_get(&by_parent, event->event);
196 /* …or the client itself */
198 client = table_get(&by_child, event->event);
200 /* Check for stack windows */
201 if (client == NULL) {
202 struct Stack_Window *stack_win;
203 SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
204 if (stack_win->window == event->event) {
205 client = stack_win->container->currently_focused;
211 /* If not, then the user moved his cursor to the root window. In that case, we adjust c_ws */
212 if (client == NULL) {
213 LOG("Getting screen at %d x %d\n", event->root_x, event->root_y);
214 check_crossing_screen_boundary(event->root_x, event->root_y);
218 /* Do plausibility checks: This event may be useless for us if it occurs on a window
219 which is in a stacked container but not the focused one */
220 if (client->container != NULL &&
221 client->container->mode == MODE_STACK &&
222 client->container->currently_focused != client) {
223 LOG("Plausibility check says: no\n");
227 if (client->workspace != c_ws && client->workspace->screen == c_ws->screen) {
228 /* This can happen when a client gets assigned to a different workspace than
229 * the current one (see src/mainx.c:reparent_window). Shortly after it was created,
230 * an enter_notify will follow. */
231 LOG("enter_notify for a client on a different workspace but the same screen, ignoring\n");
235 set_focus(conn, client, false);
241 * When the user moves the mouse but does not change the active window
242 * (e.g. when having no windows opened but moving mouse on the root screen
243 * and crossing virtual screen boundaries), this callback gets called.
246 int handle_motion_notify(void *ignored, xcb_connection_t *conn, xcb_motion_notify_event_t *event) {
247 /* Skip events where the pointer was over a child window, we are only
248 * interested in events on the root window. */
249 if (event->child != 0)
252 check_crossing_screen_boundary(event->root_x, event->root_y);
258 * Called when the keyboard mapping changes (for example by using Xmodmap),
259 * we need to update our key bindings then (re-translate symbols).
262 int handle_mapping_notify(void *ignored, xcb_connection_t *conn, xcb_mapping_notify_event_t *event) {
263 if (event->request != XCB_MAPPING_KEYBOARD &&
264 event->request != XCB_MAPPING_MODIFIER)
267 LOG("Received mapping_notify for keyboard or modifier mapping, re-grabbing keys\n");
268 xcb_refresh_keyboard_mapping(keysyms, event);
270 xcb_get_numlock_mask(conn);
272 ungrab_all_keys(conn);
279 * Checks if the button press was on a stack window, handles focus setting and returns true
280 * if so, or false otherwise.
283 static bool button_press_stackwin(xcb_connection_t *conn, xcb_button_press_event_t *event) {
284 struct Stack_Window *stack_win;
285 SLIST_FOREACH(stack_win, &stack_wins, stack_windows) {
286 if (stack_win->window != event->event)
289 /* A stack window was clicked, we check if it was button4 or button5
290 which are scroll up / scroll down. */
291 if (event->detail == XCB_BUTTON_INDEX_4 || event->detail == XCB_BUTTON_INDEX_5) {
292 direction_t direction = (event->detail == XCB_BUTTON_INDEX_4 ? D_UP : D_DOWN);
293 focus_window_in_container(conn, CUR_CELL, direction);
297 /* It was no scrolling, so we calculate the destination client by
298 dividing the Y position of the event through the height of a window
299 decoration and then set the focus to this client. */
300 i3Font *font = load_font(conn, config.font);
301 int decoration_height = (font->height + 2 + 2);
302 int destination = (event->event_y / decoration_height),
306 LOG("Click on stack_win for client %d\n", destination);
307 CIRCLEQ_FOREACH(client, &(stack_win->container->clients), clients)
308 if (c++ == destination) {
309 set_focus(conn, client, true);
320 * Checks if the button press was on a bar, switches to the workspace and returns true
321 * if so, or false otherwise.
324 static bool button_press_bar(xcb_connection_t *conn, xcb_button_press_event_t *event) {
326 TAILQ_FOREACH(screen, virtual_screens, screens) {
327 if (screen->bar != event->event)
330 LOG("Click on a bar\n");
332 /* Check if the button was one of button4 or button5 (scroll up / scroll down) */
333 if (event->detail == XCB_BUTTON_INDEX_4 || event->detail == XCB_BUTTON_INDEX_5) {
334 int add = (event->detail == XCB_BUTTON_INDEX_4 ? -1 : 1);
335 for (int i = c_ws->num + add; (i >= 0) && (i < 10); i += add)
336 if (workspaces[i].screen == screen) {
337 workspace_show(conn, i+1);
343 /* Because workspaces can be on different screens, we need to loop
344 through all of them and decide to count it based on its ->screen */
345 for (int i = 0; i < 10; i++) {
346 if (workspaces[i].screen != screen)
348 LOG("Checking if click was on workspace %d with drawn = %d, tw = %d\n",
349 i, drawn, workspaces[i].text_width);
350 if (event->event_x > (drawn + 1) &&
351 event->event_x <= (drawn + 1 + workspaces[i].text_width + 5 + 5)) {
352 workspace_show(conn, i+1);
356 drawn += workspaces[i].text_width + 5 + 5 + 2;
364 int handle_button_press(void *ignored, xcb_connection_t *conn, xcb_button_press_event_t *event) {
365 LOG("Button %d pressed\n", event->state);
366 /* This was either a focus for a client’s parent (= titlebar)… */
367 Client *client = table_get(&by_child, event->event);
368 bool border_click = false;
369 if (client == NULL) {
370 client = table_get(&by_parent, event->event);
373 /* See if this was a click with the configured modifier. If so, we need
374 * to move around the client if it was floating. if not, we just process
376 if (config.floating_modifier != 0 &&
377 (event->state & config.floating_modifier) != 0) {
378 if (client == NULL) {
379 LOG("Not handling, floating_modifier was pressed and no client found\n");
382 if (client_is_floating(client)) {
383 floating_drag_window(conn, client, event);
388 if (client == NULL) {
389 /* The client was neither on a client’s titlebar nor on a client itself, maybe on a stack_window? */
390 if (button_press_stackwin(conn, event))
394 if (button_press_bar(conn, event))
397 LOG("Could not handle this button press\n");
401 /* Set focus in any case */
402 set_focus(conn, client, true);
404 /* Let’s see if this was on the borders (= resize). If not, we’re done */
405 LOG("press button on x=%d, y=%d\n", event->event_x, event->event_y);
406 resize_orientation_t orientation = O_VERTICAL;
407 Container *con = client->container;
411 LOG("dock. done.\n");
412 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
417 LOG("event->event_x = %d, client->rect.width = %d\n", event->event_x, client->rect.width);
419 /* Some clients (xfontsel for example) seem to pass clicks on their
420 * window to the parent window, thus we receive an event here which in
421 * reality is a border_click. Check for the position and fix state. */
423 event->event_x >= client->child_rect.x &&
424 event->event_x <= (client->child_rect.x + client->child_rect.width) &&
425 event->event_y >= client->child_rect.y &&
426 event->event_y <= (client->child_rect.y + client->child_rect.height)) {
427 LOG("Fixing border_click = false because of click in child\n");
428 border_click = false;
432 LOG("client. done.\n");
433 xcb_allow_events(conn, XCB_ALLOW_REPLAY_POINTER, event->time);
434 /* Floating clients should be raised on click */
435 if (client_is_floating(client))
436 xcb_raise_window(conn, client->frame);
441 /* Don’t handle events inside the titlebar, only borders are interesting */
442 i3Font *font = load_font(conn, config.font);
443 if (event->event_y >= 2 && event->event_y <= (font->height + 2 + 2)) {
444 LOG("click on titlebar\n");
446 /* Floating clients can be dragged by grabbing their titlebar */
447 if (client_is_floating(client)) {
448 /* Firstly, we raise it. Maybe the user just wanted to raise it without grabbing */
449 xcb_raise_window(conn, client->frame);
452 floating_drag_window(conn, client, event);
457 if (client_is_floating(client))
458 return floating_border_click(conn, client, event);
460 if (event->event_y < 2) {
461 /* This was a press on the top border */
464 first = con->row - 1;
466 orientation = O_HORIZONTAL;
467 } else if (event->event_y >= (client->rect.height - 2)) {
469 first = con->row + (con->rowspan - 1);
470 if (!cell_exists(con->col, first) ||
471 (first == (con->workspace->rows-1)))
475 orientation = O_HORIZONTAL;
476 } else if (event->event_x <= 2) {
481 first = con->col - 1;
483 } else if (event->event_x > 2) {
485 first = con->col + (con->colspan - 1);
486 LOG("column %d\n", first);
488 if (!cell_exists(first, con->row) ||
489 (first == (con->workspace->cols-1)))
495 return resize_graphical_handler(conn, con->workspace, first, second, orientation, event);
499 * A new window appeared on the screen (=was mapped), so let’s manage it.
502 int handle_map_request(void *prophs, xcb_connection_t *conn, xcb_map_request_event_t *event) {
503 xcb_get_window_attributes_cookie_t cookie;
505 cookie = xcb_get_window_attributes_unchecked(conn, event->window);
507 LOG("window = 0x%08x, serial is %d.\n", event->window, event->sequence);
508 add_ignore_event(event->sequence);
510 manage_window(prophs, conn, event->window, cookie, false);
515 * Configure requests are received when the application wants to resize windows on their own.
517 * We generate a synthethic configure notify event to signalize the client its "new" position.
520 int handle_configure_request(void *prophs, xcb_connection_t *conn, xcb_configure_request_event_t *event) {
521 LOG("window 0x%08x wants to be at %dx%d with %dx%d\n",
522 event->window, event->x, event->y, event->width, event->height);
524 Client *client = table_get(&by_child, event->window);
525 if (client == NULL) {
529 #define COPY_MASK_MEMBER(mask_member, event_member) do { \
530 if (event->value_mask & mask_member) { \
531 mask |= mask_member; \
532 values[c++] = event->event_member; \
536 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_X, x);
537 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_Y, y);
538 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_WIDTH, width);
539 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_HEIGHT, height);
540 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_BORDER_WIDTH, border_width);
541 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_SIBLING, sibling);
542 COPY_MASK_MEMBER(XCB_CONFIG_WINDOW_STACK_MODE, stack_mode);
544 xcb_configure_window(conn, event->window, mask, values);
550 if (client->fullscreen) {
551 LOG("Client is in fullscreen mode\n");
553 Rect child_rect = client->workspace->rect;
554 child_rect.x = child_rect.y = 0;
555 fake_configure_notify(conn, child_rect, client->child);
560 /* Floating clients can be reconfigured */
561 if (client_is_floating(client)) {
562 i3Font *font = load_font(conn, config.font);
564 if (event->value_mask & XCB_CONFIG_WINDOW_X)
565 client->rect.x = event->x;
566 if (event->value_mask & XCB_CONFIG_WINDOW_Y)
567 client->rect.y = event->y;
568 if (event->value_mask & XCB_CONFIG_WINDOW_WIDTH)
569 client->rect.width = event->width + 2 + 2;
570 if (event->value_mask & XCB_CONFIG_WINDOW_HEIGHT)
571 client->rect.height = event->height + (font->height + 2 + 2) + 2;
573 LOG("Accepted new position/size for floating client: (%d, %d) size %d x %d\n",
574 client->rect.x, client->rect.y, client->rect.width, client->rect.height);
576 /* Push the new position/size to X11 */
577 reposition_client(conn, client);
578 resize_client(conn, client);
584 if (client->fullscreen) {
585 LOG("Client is in fullscreen mode\n");
587 Rect child_rect = client->container->workspace->rect;
588 child_rect.x = child_rect.y = 0;
589 fake_configure_notify(conn, child_rect, client->child);
594 fake_absolute_configure_notify(conn, client);
600 * Configuration notifies are only handled because we need to set up ignore for the following
601 * enter notify events
604 int handle_configure_event(void *prophs, xcb_connection_t *conn, xcb_configure_notify_event_t *event) {
605 xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
607 /* We ignore this sequence twice because events for child and frame should be ignored */
608 add_ignore_event(event->sequence);
609 add_ignore_event(event->sequence);
611 if (event->event == root) {
612 LOG("event->x = %d, ->y = %d, ->width = %d, ->height = %d\n", event->x, event->y, event->width, event->height);
613 LOG("reconfigure of the root window, need to xinerama\n");
614 /* FIXME: Somehow, this is occuring too often. Therefore, we check for 0/0,
615 but is there a better way? */
616 if (event->x == 0 && event->y == 0)
617 xinerama_requery_screens(conn);
625 * Our window decorations were unmapped. That means, the window will be killed now,
626 * so we better clean up before.
629 int handle_unmap_notify_event(void *data, xcb_connection_t *conn, xcb_unmap_notify_event_t *event) {
630 xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
632 add_ignore_event(event->sequence);
634 Client *client = table_get(&by_child, event->window);
635 /* First, we need to check if the client is awaiting an unmap-request which
636 was generated by us reparenting the window. In that case, we just ignore it. */
637 if (client != NULL && client->awaiting_useless_unmap) {
638 client->awaiting_useless_unmap = false;
642 LOG("event->window = %08x, event->event = %08x\n", event->window, event->event);
643 LOG("UnmapNotify for 0x%08x (received from 0x%08x)\n", event->window, event->event);
644 if (client == NULL) {
645 LOG("not a managed window. Ignoring.\n");
647 /* This was most likely the destroyed frame of a client which is
648 * currently being unmapped, so we add this sequence (again!) to
649 * the ignore list (enter_notify events will get sent for both,
650 * the child and its frame). */
651 add_ignore_event(event->sequence);
656 client = table_remove(&by_child, event->window);
658 /* If this was the fullscreen client, we need to unset it */
659 if (client->fullscreen)
660 client->workspace->fullscreen_client = NULL;
662 /* Clients without a container are either floating or dock windows */
663 if (client->container != NULL) {
664 Container *con = client->container;
666 /* Remove the client from the list of clients */
667 client_remove_from_container(conn, client, con, true);
669 /* Set focus to the last focused client in this container */
670 con->currently_focused = get_last_focused_client(conn, con, NULL);
672 /* Only if this is the active container, we need to really change focus */
673 if ((con->currently_focused != NULL) && ((con == CUR_CELL) || client->fullscreen))
674 set_focus(conn, con->currently_focused, true);
675 } else if (client_is_floating(client)) {
676 LOG("Removing from floating clients\n");
677 TAILQ_REMOVE(&(client->workspace->floating_clients), client, floating_clients);
678 SLIST_REMOVE(&(client->workspace->focus_stack), client, Client, focus_clients);
682 LOG("Removing from dock clients\n");
683 SLIST_REMOVE(&(client->workspace->screen->dock_clients), client, Client, dock_clients);
686 LOG("child of 0x%08x.\n", client->frame);
687 xcb_reparent_window(conn, client->child, root, 0, 0);
689 client_unmap(conn, client);
691 xcb_destroy_window(conn, client->frame);
693 table_remove(&by_parent, client->frame);
695 if (client->container != NULL) {
696 Workspace *workspace = client->container->workspace;
697 cleanup_table(conn, workspace);
698 fix_colrowspan(conn, workspace);
701 /* Let’s see how many clients there are left on the workspace to delete it if it’s empty */
702 bool workspace_empty = SLIST_EMPTY(&(client->workspace->focus_stack));
703 bool workspace_active = false;
704 Client *to_focus = (!workspace_empty ? SLIST_FIRST(&(client->workspace->focus_stack)) : NULL);
706 /* If this workspace is currently active, we don’t delete it */
708 TAILQ_FOREACH(screen, virtual_screens, screens)
709 if (screen->current_workspace == client->workspace->num) {
710 workspace_active = true;
711 workspace_empty = false;
716 client->workspace->screen = NULL;
718 FREE(client->window_class);
724 /* Ensure the focus is set to the next client in the focus stack */
725 if (workspace_active && to_focus != NULL)
726 set_focus(conn, to_focus, true);
732 * Called when a window changes its title
735 int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
736 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
737 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
738 LOG("_NET_WM_NAME not specified, not changing\n");
741 Client *client = table_get(&by_child, window);
745 /* Save the old pointer to make the update atomic */
748 asprintf(&new_name, "%.*s", xcb_get_property_value_length(prop), (char*)xcb_get_property_value(prop));
749 /* Convert it to UCS-2 here for not having to convert it later every time we want to pass it to X */
750 char *ucs2_name = convert_utf8_to_ucs2(new_name, &new_len);
751 LOG("_NET_WM_NAME changed to \"%s\"\n", new_name);
754 /* Check if they are the same and don’t update if so.
755 Note the use of new_len * 2 to check all bytes as each glyph takes 2 bytes.
756 Also note the use of memcmp() instead of strncmp() because the latter stops on nullbytes,
757 but UCS-2 uses nullbytes to fill up glyphs which only use one byte. */
758 if ((new_len == client->name_len) &&
759 (client->name != NULL) &&
760 (memcmp(client->name, ucs2_name, new_len * 2) == 0)) {
765 char *old_name = client->name;
766 client->name = ucs2_name;
767 client->name_len = new_len;
768 client->uses_net_wm_name = true;
772 /* If the client is a dock window, we don’t need to render anything */
776 if (client->container != NULL && client->container->mode == MODE_STACK)
777 render_container(conn, client->container);
778 else decorate_window(conn, client, client->frame, client->titlegc, 0);
785 * We handle legacy window names (titles) which are in COMPOUND_TEXT encoding. However, we
786 * just pass them along, so when containing non-ASCII characters, those will be rendering
787 * incorrectly. In order to correctly render unicode window titles in i3, an application
788 * has to set _NET_WM_NAME, which is in UTF-8 encoding.
790 * On every update, a message is put out to the user, so he may improve the situation and
791 * update applications which display filenames in their title to correctly use
792 * _NET_WM_NAME and therefore support unicode.
795 int handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
796 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
797 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
798 LOG("prop == NULL\n");
801 Client *client = table_get(&by_child, window);
805 /* Client capable of _NET_WM_NAME, ignore legacy name changes */
806 if (client->uses_net_wm_name)
809 /* Save the old pointer to make the update atomic */
811 if (asprintf(&new_name, "%.*s", xcb_get_property_value_length(prop), (char*)xcb_get_property_value(prop)) == -1) {
812 perror("Could not get old name");
813 LOG("Could not get old name\n");
816 /* Convert it to UCS-2 here for not having to convert it later every time we want to pass it to X */
817 LOG("WM_NAME changed to \"%s\"\n", new_name);
819 /* Check if they are the same and don’t update if so. */
820 if (client->name != NULL &&
821 strlen(new_name) == strlen(client->name) &&
822 strcmp(client->name, new_name) == 0) {
827 LOG("Using legacy window title. Note that in order to get Unicode window titles in i3, "
828 "the application has to set _NET_WM_NAME which is in UTF-8 encoding.\n");
830 char *old_name = client->name;
831 client->name = new_name;
832 client->name_len = -1;
834 if (old_name != NULL)
837 /* If the client is a dock window, we don’t need to render anything */
841 if (client->container != NULL && client->container->mode == MODE_STACK)
842 render_container(conn, client->container);
843 else decorate_window(conn, client, client->frame, client->titlegc, 0);
850 * Updates the client’s WM_CLASS property
853 int handle_windowclass_change(void *data, xcb_connection_t *conn, uint8_t state,
854 xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
855 if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
856 LOG("prop == NULL\n");
859 Client *client = table_get(&by_child, window);
863 if (asprintf(&new_class, "%.*s", xcb_get_property_value_length(prop), (char*)xcb_get_property_value(prop)) == -1) {
864 perror("Could not get window class");
865 LOG("Could not get window class\n");
869 LOG("WM_CLASS changed to %s\n", new_class);
870 char *old_class = client->window_class;
871 client->window_class = new_class;
874 if (!client->initialized)
877 if (strcmp(new_class, "tools") == 0 || strcmp(new_class, "Dialog") == 0) {
878 LOG("tool/dialog window, should we put it floating?\n");
879 if (client->floating == FLOATING_AUTO_OFF)
880 toggle_floating_mode(conn, client, true);
887 * Expose event means we should redraw our windows (= title bar)
890 int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *event) {
891 /* event->count is the number of minimum remaining expose events for this window, so we
892 skip all events but the last one */
893 if (event->count != 0)
895 LOG("window = %08x\n", event->window);
897 Client *client = table_get(&by_parent, event->window);
898 if (client == NULL) {
899 /* There was no client in the table, so this is probably an expose event for
900 one of our stack_windows. */
901 struct Stack_Window *stack_win;
902 SLIST_FOREACH(stack_win, &stack_wins, stack_windows)
903 if (stack_win->window == event->window) {
904 render_container(conn, stack_win->container);
908 /* …or one of the bars? */
910 TAILQ_FOREACH(screen, virtual_screens, screens)
911 if (screen->bar == event->window)
919 if (client->container == NULL || client->container->mode != MODE_STACK)
920 decorate_window(conn, client, client->frame, client->titlegc, 0);
922 uint32_t background_color;
923 /* Distinguish if the window is currently focused… */
924 if (CUR_CELL->currently_focused == client)
925 background_color = config.client.focused.background;
926 /* …or if it is the focused window in a not focused container */
927 else background_color = config.client.focused_inactive.background;
929 /* Set foreground color to current focused color, line width to 2 */
930 uint32_t values[] = {background_color, 2};
931 xcb_change_gc(conn, client->titlegc, XCB_GC_FOREGROUND | XCB_GC_LINE_WIDTH, values);
933 /* Draw the border, the ±1 is for line width = 2 */
934 xcb_point_t points[] = {{1, 0}, /* left upper edge */
935 {1, client->rect.height-1}, /* left bottom edge */
936 {client->rect.width-1, client->rect.height-1}, /* right bottom edge */
937 {client->rect.width-1, 0}}; /* right upper edge */
938 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, client->frame, client->titlegc, 4, points);
940 /* Draw a black background */
941 xcb_change_gc_single(conn, client->titlegc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
942 xcb_rectangle_t crect = {2, 0, client->rect.width - (2 + 2), client->rect.height - 2};
943 xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &crect);
950 * Handle client messages (EWMH)
953 int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event) {
954 if (event->type == atoms[_NET_WM_STATE]) {
955 if (event->format != 32 || event->data.data32[1] != atoms[_NET_WM_STATE_FULLSCREEN])
958 Client *client = table_get(&by_child, event->window);
962 /* Check if the fullscreen state should be toggled */
963 if ((client->fullscreen &&
964 (event->data.data32[0] == _NET_WM_STATE_REMOVE ||
965 event->data.data32[0] == _NET_WM_STATE_TOGGLE)) ||
966 (!client->fullscreen &&
967 (event->data.data32[0] == _NET_WM_STATE_ADD ||
968 event->data.data32[0] == _NET_WM_STATE_TOGGLE)))
969 client_toggle_fullscreen(conn, client);
971 LOG("unhandled clientmessage\n");
978 int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
979 xcb_atom_t atom, xcb_get_property_reply_t *property) {
980 /* TODO: Implement this one. To do this, implement a little test program which sleep(1)s
981 before changing this property. */
982 LOG("_NET_WM_WINDOW_TYPE changed, this is not yet implemented.\n");
987 * Handles the size hints set by a window, but currently only the part necessary for displaying
988 * clients proportionally inside their frames (mplayer for example)
990 * See ICCCM 4.1.2.3 for more details
993 int handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
994 xcb_atom_t name, xcb_get_property_reply_t *reply) {
995 Client *client = table_get(&by_child, window);
996 if (client == NULL) {
997 LOG("Received WM_SIZE_HINTS for unknown client\n");
1000 xcb_size_hints_t size_hints;
1004 /* If the hints were already in this event, use them, if not, request them */
1006 xcb_get_wm_size_hints_from_reply(&size_hints, reply);
1008 xcb_get_wm_normal_hints_reply(conn, xcb_get_wm_normal_hints_unchecked(conn, client->child), &size_hints, NULL);
1010 if ((size_hints.flags & XCB_SIZE_HINT_P_MIN_SIZE)) {
1011 // TODO: Minimum size is not yet implemented
1012 //LOG("Minimum size: %d (width) x %d (height)\n", size_hints.min_width, size_hints.min_height);
1015 if ((size_hints.flags & XCB_SIZE_HINT_P_RESIZE_INC)) {
1016 if (size_hints.width_inc > 0)
1017 client->width_increment = size_hints.width_inc;
1018 if (size_hints.height_inc > 0)
1019 client->height_increment = size_hints.height_inc;
1022 /* If no aspect ratio was set or if it was invalid, we ignore the hints */
1023 if (!(size_hints.flags & XCB_SIZE_HINT_P_ASPECT) ||
1024 (size_hints.min_aspect_num <= 0) ||
1025 (size_hints.min_aspect_den <= 0)) {
1029 int base_width = 0, base_height = 0;
1031 /* base_width/height are the desired size of the window.
1032 We check if either the program-specified size or the program-specified
1033 min-size is available */
1034 if (size_hints.flags & XCB_SIZE_HINT_P_SIZE) {
1035 base_width = size_hints.base_width;
1036 base_height = size_hints.base_height;
1037 } else if (size_hints.flags & XCB_SIZE_HINT_P_MIN_SIZE) {
1038 base_width = size_hints.min_width;
1039 base_height = size_hints.min_height;
1042 double width = client->rect.width - base_width;
1043 double height = client->rect.height - base_height;
1044 /* Convert numerator/denominator to a double */
1045 double min_aspect = (double)size_hints.min_aspect_num / size_hints.min_aspect_den;
1046 double max_aspect = (double)size_hints.max_aspect_num / size_hints.min_aspect_den;
1048 LOG("Aspect ratio set: minimum %f, maximum %f\n", min_aspect, max_aspect);
1049 LOG("width = %f, height = %f\n", width, height);
1051 /* Sanity checks, this is user-input, in a way */
1052 if (max_aspect <= 0 || min_aspect <= 0 || height == 0 || (width / height) <= 0)
1055 /* Check if we need to set proportional_* variables using the correct ratio */
1056 if ((width / height) < min_aspect) {
1057 client->proportional_width = width;
1058 client->proportional_height = width / min_aspect;
1059 } else if ((width / height) > max_aspect) {
1060 client->proportional_width = width;
1061 client->proportional_height = width / max_aspect;
1064 client->force_reconfigure = true;
1066 if (client->container != NULL) {
1067 render_container(conn, client->container);
1075 * Handles the transient for hints set by a window, signalizing that this window is a popup window
1076 * for some other window.
1078 * See ICCCM 4.1.2.6 for more details
1081 int handle_transient_for(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
1082 xcb_atom_t name, xcb_get_property_reply_t *reply) {
1083 Client *client = table_get(&by_child, window);
1084 if (client == NULL) {
1085 LOG("No such client\n");
1089 xcb_window_t transient_for;
1091 if (reply != NULL) {
1092 if (!xcb_get_wm_transient_for_from_reply(&transient_for, reply))
1095 if (!xcb_get_wm_transient_for_reply(conn, xcb_get_wm_transient_for_unchecked(conn, window),
1096 &transient_for, NULL))
1100 if (client->floating == FLOATING_AUTO_OFF) {
1101 LOG("This is a popup window, putting into floating\n");
1102 toggle_floating_mode(conn, client, true);
1109 * Handles changes of the WM_CLIENT_LEADER atom which specifies if this is a
1110 * toolwindow (or similar) and to which window it belongs (logical parent).
1113 int handle_clientleader_change(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
1114 xcb_atom_t name, xcb_get_property_reply_t *prop) {
1116 prop = xcb_get_property_reply(conn, xcb_get_property_unchecked(conn,
1117 false, window, WM_CLIENT_LEADER, WINDOW, 0, 32), NULL);
1122 Client *client = table_get(&by_child, window);
1126 xcb_window_t *leader = xcb_get_property_value(prop);
1127 if (leader == NULL || *leader == 0)
1130 LOG("Client leader changed to %08x\n", *leader);
1132 client->leader = *leader;