2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
6 * © 2009-2010 Michael Stapelberg and contributors
8 * See file LICENSE for license information.
10 * src/floating.c: contains all functions for handling floating clients
17 extern xcb_connection_t *conn;
19 void floating_enable(Con *con, bool automatic) {
20 bool set_focus = (con == focused);
22 if (con_is_floating(con)) {
23 LOG("Container is already in floating mode, not doing anything.\n");
27 /* 1: If the container is a workspace container, we need to create a new
28 * split-container with the same orientation and make that one floating. We
29 * cannot touch the workspace container itself because floating containers
30 * are children of the workspace. */
31 if (con->type == CT_WORKSPACE) {
32 LOG("This is a workspace, creating new container around content\n");
33 if (con_num_children(con) == 0) {
34 LOG("Workspace is empty, aborting\n");
37 /* TODO: refactor this with src/con.c:con_set_layout */
38 Con *new = con_new(NULL, NULL);
40 new->orientation = con->orientation;
42 /* since the new container will be set into floating mode directly
43 * afterwards, we need to copy the workspace rect. */
44 memcpy(&(new->rect), &(con->rect), sizeof(Rect));
46 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
47 if (old_focused == TAILQ_END(&(con->focus_head)))
50 /* 4: move the existing cons of this workspace below the new con */
51 DLOG("Moving cons\n");
53 while (!TAILQ_EMPTY(&(con->nodes_head))) {
54 child = TAILQ_FIRST(&(con->nodes_head));
56 con_attach(child, new, true);
59 /* 4: attach the new split container to the workspace */
60 DLOG("Attaching new split to ws\n");
61 con_attach(new, con, false);
64 con_focus(old_focused);
70 /* 1: detach the container from its parent */
71 /* TODO: refactor this with tree_close() */
72 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
73 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
75 con_fix_percent(con->parent);
77 /* 2: create a new container to render the decoration on, add
78 * it as a floating window to the workspace */
79 Con *nc = con_new(NULL, NULL);
80 /* we need to set the parent afterwards instead of passing it as an
81 * argument to con_new() because nc would be inserted into the tiling layer
83 Con *ws = con_get_workspace(con);
86 /* check if the parent container is empty and close it if so */
87 if ((con->parent->type == CT_CON || con->parent->type == CT_FLOATING_CON) && con_num_children(con->parent) == 0) {
88 DLOG("Old container empty after setting this child to floating, closing\n");
89 tree_close(con->parent, DONT_KILL_WINDOW, false);
93 asprintf(&name, "[i3 con] floatingcon around %p", con);
97 /* find the height for the decorations */
98 int deco_height = config.font.height + 5;
100 DLOG("Original rect: (%d, %d) with %d x %d\n", con->rect.x, con->rect.y, con->rect.width, con->rect.height);
101 Rect zero = { 0, 0, 0, 0 };
102 nc->rect = con->geometry;
103 /* If the geometry was not set (split containers), we need to determine a
104 * sensible one by combining the geometry of all children */
105 if (memcmp(&(nc->rect), &zero, sizeof(Rect)) == 0) {
106 DLOG("Geometry not set, combining children\n");
108 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
109 DLOG("child geometry: %d x %d\n", child->geometry.width, child->geometry.height);
110 nc->rect.width += child->geometry.width;
111 nc->rect.height = max(nc->rect.height, child->geometry.height);
114 /* Raise the width/height to at least 75x50 (minimum size for windows) */
115 nc->rect.width = max(nc->rect.width, 75);
116 nc->rect.height = max(nc->rect.height, 50);
117 /* add pixels for the decoration */
118 /* TODO: don’t add them when the user automatically puts new windows into
119 * 1pixel/borderless mode */
120 nc->rect.height += deco_height + 4;
123 /* Some clients (like GIMP’s color picker window) get mapped
124 * to (0, 0), so we push them to a reasonable position
125 * (centered over their leader) */
126 if (nc->rect.x == 0 && nc->rect.y == 0) {
128 if (con->window && con->window->leader != XCB_NONE &&
129 (leader = con_by_window_id(con->window->leader)) != NULL) {
130 DLOG("Centering above leader\n");
131 nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
132 nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
134 /* center the window on workspace as fallback */
135 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
136 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
140 /* Sanity check: Are the coordinates on the appropriate output? If not, we
141 * need to change them */
142 Output *current_output = get_output_containing(nc->rect.x, nc->rect.y);
143 Con *correct_output = con_get_output(ws);
144 if (!current_output || current_output->con != correct_output) {
145 DLOG("This floating window is on the wrong output, fixing coordinates (currently (%d, %d))\n",
146 nc->rect.x, nc->rect.y);
147 /* Take the relative coordinates of the current output, then add them
148 * to the coordinate space of the correct output */
149 uint32_t rel_x = (nc->rect.x - (current_output ? current_output->con->rect.x : 0));
150 uint32_t rel_y = (nc->rect.y - (current_output ? current_output->con->rect.y : 0));
151 nc->rect.x = correct_output->rect.x + rel_x;
152 nc->rect.y = correct_output->rect.y + rel_y;
155 DLOG("Floating rect: (%d, %d) with %d x %d\n", nc->rect.x, nc->rect.y, nc->rect.width, nc->rect.height);
156 nc->orientation = NO_ORIENTATION;
157 nc->type = CT_FLOATING_CON;
158 TAILQ_INSERT_TAIL(&(ws->floating_head), nc, floating_windows);
159 TAILQ_INSERT_TAIL(&(ws->focus_head), nc, focused);
161 /* 3: attach the child to the new parent container */
164 con->floating = FLOATING_USER_ON;
166 /* 4: set the border style as specified with new_float */
168 con->border_style = config.default_floating_border;
170 TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
171 TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
173 /* render the cons to get initial window_rect correct */
174 render_con(nc, false);
175 render_con(con, false);
180 /* Check if we need to re-assign it to a different workspace because of its
181 * coordinates and exit if that was done successfully. */
182 if (floating_maybe_reassign_ws(nc))
185 /* Sanitize coordinates: Check if they are on any output */
186 if (get_output_containing(nc->rect.x, nc->rect.y) != NULL)
189 ELOG("No output found at destination coordinates, centering floating window on current ws\n");
190 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
191 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
194 void floating_disable(Con *con, bool automatic) {
195 if (!con_is_floating(con)) {
196 LOG("Container isn't floating, not doing anything.\n");
200 Con *ws = con_get_workspace(con);
202 /* 1: detach from parent container */
203 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
204 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
206 /* 2: kill parent container */
207 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
208 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
209 tree_close(con->parent, DONT_KILL_WINDOW, false);
211 /* 3: re-attach to the parent of the currently focused con on the workspace
212 * this floating con was on */
213 Con *focused = con_descend_tiling_focused(ws);
215 /* if there is no other container on this workspace, focused will be the
216 * workspace itself */
217 if (focused->type == CT_WORKSPACE)
218 con->parent = focused;
219 else con->parent = focused->parent;
221 /* con_fix_percent will adjust the percent value */
224 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
225 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
227 con->floating = FLOATING_USER_OFF;
229 con_fix_percent(con->parent);
230 // TODO: don’t influence focus handling when Con was not focused before.
235 * Toggles floating mode for the given container.
237 * If the automatic flag is set to true, this was an automatic update by a change of the
238 * window class from the application which can be overwritten by the user.
241 void toggle_floating_mode(Con *con, bool automatic) {
242 /* see if the client is already floating */
243 if (con_is_floating(con)) {
244 LOG("already floating, re-setting to tiling\n");
246 floating_disable(con, automatic);
250 floating_enable(con, automatic);
254 * Raises the given container in the list of floating containers
257 void floating_raise_con(Con *con) {
258 DLOG("Raising floating con %p / %s\n", con, con->name);
259 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
260 TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
264 * Checks if con’s coordinates are within its workspace and re-assigns it to
265 * the actual workspace if not.
268 bool floating_maybe_reassign_ws(Con *con) {
269 Output *output = get_output_containing(
270 con->rect.x + (con->rect.width / 2),
271 con->rect.y + (con->rect.height / 2));
274 ELOG("No output found at destination coordinates?\n");
278 if (con_get_output(con) == output->con) {
279 DLOG("still the same ws\n");
283 DLOG("Need to re-assign!\n");
285 Con *content = output_get_content(output->con);
286 Con *ws = TAILQ_FIRST(&(content->focus_head));
287 DLOG("Moving con %p / %s to workspace %p / %s\n", con, con->name, ws, ws->name);
288 con_move_to_workspace(con, ws, true);
289 con_focus(con_descend_focused(con));
293 DRAGGING_CB(drag_window_callback) {
294 struct xcb_button_press_event_t *event = extra;
296 /* Reposition the client correctly while moving */
297 con->rect.x = old_rect->x + (new_x - event->root_x);
298 con->rect.y = old_rect->y + (new_y - event->root_y);
300 render_con(con, false);
304 /* Check if we cross workspace boundaries while moving */
305 if (!floating_maybe_reassign_ws(con))
311 * Called when the user clicked on the titlebar of a floating window.
312 * Calls the drag_pointer function with the drag_window callback
315 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
316 DLOG("floating_drag_window\n");
318 /* Push changes before dragging, so that the window gets raised now and not
319 * after the user releases the mouse button */
322 /* Drag the window */
323 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
328 * This is an ugly data structure which we need because there is no standard
329 * way of having nested functions (only available as a gcc extension at the
330 * moment, clang doesn’t support it) or blocks (only available as a clang
331 * extension and only on Mac OS X systems at the moment).
334 struct resize_window_callback_params {
337 xcb_button_press_event_t *event;
340 DRAGGING_CB(resize_window_callback) {
341 struct resize_window_callback_params *params = extra;
342 xcb_button_press_event_t *event = params->event;
343 border_t corner = params->corner;
345 int32_t dest_x = con->rect.x;
346 int32_t dest_y = con->rect.y;
348 uint32_t dest_height;
350 double ratio = (double) old_rect->width / old_rect->height;
352 /* First guess: We resize by exactly the amount the mouse moved,
353 * taking into account in which corner the client was grabbed */
354 if (corner & BORDER_LEFT)
355 dest_width = old_rect->width - (new_x - event->root_x);
356 else dest_width = old_rect->width + (new_x - event->root_x);
358 if (corner & BORDER_TOP)
359 dest_height = old_rect->height - (new_y - event->root_y);
360 else dest_height = old_rect->height + (new_y - event->root_y);
362 /* Obey minimum window size */
363 Rect minimum = con_minimum_size(con);
364 dest_width = max(dest_width, minimum.width);
365 dest_height = max(dest_height, minimum.height);
367 /* User wants to keep proportions, so we may have to adjust our values */
368 if (params->proportional) {
369 dest_width = max(dest_width, (int) (dest_height * ratio));
370 dest_height = max(dest_height, (int) (dest_width / ratio));
373 /* If not the lower right corner is grabbed, we must also reposition
374 * the client by exactly the amount we resized it */
375 if (corner & BORDER_LEFT)
376 dest_x = old_rect->x + (old_rect->width - dest_width);
378 if (corner & BORDER_TOP)
379 dest_y = old_rect->y + (old_rect->height - dest_height);
381 con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
383 /* TODO: don’t re-render the whole tree just because we change
384 * coordinates of a floating window */
386 x_push_changes(croot);
390 * Called when the user clicked on a floating window while holding the
391 * floating_modifier and the right mouse button.
392 * Calls the drag_pointer function with the resize_window callback
395 void floating_resize_window(Con *con, bool proportional,
396 xcb_button_press_event_t *event) {
397 DLOG("floating_resize_window\n");
399 /* corner saves the nearest corner to the original click. It contains
400 * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
403 if (event->event_x <= (con->rect.width / 2))
404 corner |= BORDER_LEFT;
405 else corner |= BORDER_RIGHT;
407 if (event->event_y <= (con->rect.height / 2))
408 corner |= BORDER_TOP;
409 else corner |= BORDER_BOTTOM;
411 struct resize_window_callback_params params = { corner, proportional, event };
413 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, ¶ms);
417 * This function grabs your pointer and lets you drag stuff around (borders).
418 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
419 * and the given callback will be called with the parameters specified (client,
420 * border on which the click originally was), the original rect of the client,
421 * the event and the new coordinates (x, y).
424 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
425 confine_to, border_t border, callback_t callback, void *extra)
427 uint32_t new_x, new_y;
430 memcpy(&old_rect, &(con->rect), sizeof(Rect));
432 /* Grab the pointer */
433 xcb_grab_pointer_cookie_t cookie;
434 xcb_grab_pointer_reply_t *reply;
435 cookie = xcb_grab_pointer(conn,
436 false, /* get all pointer events specified by the following mask */
437 root, /* grab the root window */
438 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
439 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
440 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
441 confine_to, /* confine_to = in which window should the cursor stay */
442 XCB_NONE, /* don’t display a special cursor */
445 if ((reply = xcb_grab_pointer_reply(conn, cookie, NULL)) == NULL) {
446 ELOG("Could not grab pointer\n");
452 /* Go into our own event loop */
455 xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
456 bool loop_done = false;
457 /* I’ve always wanted to have my own eventhandler… */
458 while (!loop_done && (inside_event = xcb_wait_for_event(conn))) {
459 /* We now handle all events we can get using xcb_poll_for_event */
461 /* skip x11 errors */
462 if (inside_event->response_type == 0) {
466 /* Strip off the highest bit (set if the event is generated) */
467 int type = (inside_event->response_type & 0x7F);
470 case XCB_BUTTON_RELEASE:
474 case XCB_MOTION_NOTIFY:
475 /* motion_notify events are saved for later */
476 FREE(last_motion_notify);
477 last_motion_notify = inside_event;
480 case XCB_UNMAP_NOTIFY:
482 case XCB_KEY_RELEASE:
483 DLOG("Unmap-notify, aborting\n");
484 handle_event(type, inside_event);
489 DLOG("Passing to original handler\n");
490 /* Use original handler */
491 handle_event(type, inside_event);
494 if (last_motion_notify != inside_event)
496 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
498 if (last_motion_notify == NULL)
501 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
502 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
504 callback(con, &old_rect, new_x, new_y, extra);
505 FREE(last_motion_notify);
508 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
514 * Changes focus in the given direction for floating clients.
516 * Changing to the left/right means going to the previous/next floating client,
517 * changing to top/bottom means cycling through the Z-index.
520 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
521 DLOG("floating focus\n");
523 if (direction == D_LEFT || direction == D_RIGHT) {
524 /* Go to the next/previous floating client */
527 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
528 TAILQ_NEXT(currently_focused, floating_clients))) !=
529 TAILQ_END(&(currently_focused->workspace->floating_clients))) {
530 if (!client->floating)
532 set_focus(conn, client, true);
539 * Moves the client 10px to the specified direction.
542 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
543 DLOG("floating move\n");
545 Rect destination = currently_focused->rect;
546 Rect *screen = &(currently_focused->workspace->output->rect);
561 /* to make static analyzers happy */
566 /* Prevent windows from vanishing completely */
567 if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
568 (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
569 (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
570 (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
571 DLOG("boundary check failed, not moving\n");
575 currently_focused->rect = destination;
576 reposition_client(conn, currently_focused);
578 /* Because reposition_client does not send a faked configure event (only resize does),
579 * we need to initiate that on our own */
580 fake_absolute_configure_notify(conn, currently_focused);
581 /* fake_absolute_configure_notify flushes */
585 * Hides all floating clients (or show them if they are currently hidden) on
586 * the specified workspace.
589 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
592 workspace->floating_hidden = !workspace->floating_hidden;
593 DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
594 TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
595 if (workspace->floating_hidden)
596 client_unmap(conn, client);
597 else client_map(conn, client);
600 /* If we just unmapped all floating windows we should ensure that the focus
601 * is set correctly, that ist, to the first non-floating client in stack */
602 if (workspace->floating_hidden)
603 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
604 if (client_is_floating(client))
606 set_focus(conn, client, true);