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->parent && con->parent->type == CT_DOCKAREA) {
23 LOG("Container is a dock window, not enabling floating mode.\n");
27 if (con_is_floating(con)) {
28 LOG("Container is already in floating mode, not doing anything.\n");
32 /* 1: If the container is a workspace container, we need to create a new
33 * split-container with the same orientation and make that one floating. We
34 * cannot touch the workspace container itself because floating containers
35 * are children of the workspace. */
36 if (con->type == CT_WORKSPACE) {
37 LOG("This is a workspace, creating new container around content\n");
38 if (con_num_children(con) == 0) {
39 LOG("Workspace is empty, aborting\n");
42 /* TODO: refactor this with src/con.c:con_set_layout */
43 Con *new = con_new(NULL, NULL);
45 new->orientation = con->orientation;
47 /* since the new container will be set into floating mode directly
48 * afterwards, we need to copy the workspace rect. */
49 memcpy(&(new->rect), &(con->rect), sizeof(Rect));
51 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
52 if (old_focused == TAILQ_END(&(con->focus_head)))
55 /* 4: move the existing cons of this workspace below the new con */
56 DLOG("Moving cons\n");
58 while (!TAILQ_EMPTY(&(con->nodes_head))) {
59 child = TAILQ_FIRST(&(con->nodes_head));
61 con_attach(child, new, true);
64 /* 4: attach the new split container to the workspace */
65 DLOG("Attaching new split to ws\n");
66 con_attach(new, con, false);
69 con_focus(old_focused);
75 /* 1: detach the container from its parent */
76 /* TODO: refactor this with tree_close() */
77 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
78 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
80 con_fix_percent(con->parent);
82 /* 2: create a new container to render the decoration on, add
83 * it as a floating window to the workspace */
84 Con *nc = con_new(NULL, NULL);
85 /* we need to set the parent afterwards instead of passing it as an
86 * argument to con_new() because nc would be inserted into the tiling layer
88 Con *ws = con_get_workspace(con);
91 /* check if the parent container is empty and close it if so */
92 if ((con->parent->type == CT_CON || con->parent->type == CT_FLOATING_CON) && con_num_children(con->parent) == 0) {
93 DLOG("Old container empty after setting this child to floating, closing\n");
94 tree_close(con->parent, DONT_KILL_WINDOW, false);
98 asprintf(&name, "[i3 con] floatingcon around %p", con);
102 /* find the height for the decorations */
103 int deco_height = config.font.height + 5;
105 DLOG("Original rect: (%d, %d) with %d x %d\n", con->rect.x, con->rect.y, con->rect.width, con->rect.height);
106 Rect zero = { 0, 0, 0, 0 };
107 nc->rect = con->geometry;
108 /* If the geometry was not set (split containers), we need to determine a
109 * sensible one by combining the geometry of all children */
110 if (memcmp(&(nc->rect), &zero, sizeof(Rect)) == 0) {
111 DLOG("Geometry not set, combining children\n");
113 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
114 DLOG("child geometry: %d x %d\n", child->geometry.width, child->geometry.height);
115 nc->rect.width += child->geometry.width;
116 nc->rect.height = max(nc->rect.height, child->geometry.height);
119 /* Raise the width/height to at least 75x50 (minimum size for windows) */
120 nc->rect.width = max(nc->rect.width, 75);
121 nc->rect.height = max(nc->rect.height, 50);
122 /* add pixels for the decoration */
123 /* TODO: don’t add them when the user automatically puts new windows into
124 * 1pixel/borderless mode */
125 nc->rect.height += deco_height + 4;
128 /* Some clients (like GIMP’s color picker window) get mapped
129 * to (0, 0), so we push them to a reasonable position
130 * (centered over their leader) */
131 if (nc->rect.x == 0 && nc->rect.y == 0) {
133 if (con->window && con->window->leader != XCB_NONE &&
134 (leader = con_by_window_id(con->window->leader)) != NULL) {
135 DLOG("Centering above leader\n");
136 nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
137 nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
139 /* center the window on workspace as fallback */
140 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
141 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
145 /* Sanity check: Are the coordinates on the appropriate output? If not, we
146 * need to change them */
147 Output *current_output = get_output_containing(nc->rect.x, nc->rect.y);
148 Con *correct_output = con_get_output(ws);
149 if (!current_output || current_output->con != correct_output) {
150 DLOG("This floating window is on the wrong output, fixing coordinates (currently (%d, %d))\n",
151 nc->rect.x, nc->rect.y);
152 /* Take the relative coordinates of the current output, then add them
153 * to the coordinate space of the correct output */
154 uint32_t rel_x = (nc->rect.x - (current_output ? current_output->con->rect.x : 0));
155 uint32_t rel_y = (nc->rect.y - (current_output ? current_output->con->rect.y : 0));
156 nc->rect.x = correct_output->rect.x + rel_x;
157 nc->rect.y = correct_output->rect.y + rel_y;
160 DLOG("Floating rect: (%d, %d) with %d x %d\n", nc->rect.x, nc->rect.y, nc->rect.width, nc->rect.height);
161 nc->orientation = NO_ORIENTATION;
162 nc->type = CT_FLOATING_CON;
163 TAILQ_INSERT_TAIL(&(ws->floating_head), nc, floating_windows);
164 TAILQ_INSERT_TAIL(&(ws->focus_head), nc, focused);
166 /* 3: attach the child to the new parent container */
169 con->floating = FLOATING_USER_ON;
171 TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
172 TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
174 /* render the cons to get initial window_rect correct */
175 render_con(nc, false);
176 render_con(con, false);
181 /* Check if we need to re-assign it to a different workspace because of its
182 * coordinates and exit if that was done successfully. */
183 if (floating_maybe_reassign_ws(nc))
186 /* Sanitize coordinates: Check if they are on any output */
187 if (get_output_containing(nc->rect.x, nc->rect.y) != NULL)
190 ELOG("No output found at destination coordinates, centering floating window on current ws\n");
191 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
192 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
195 void floating_disable(Con *con, bool automatic) {
196 if (!con_is_floating(con)) {
197 LOG("Container isn't floating, not doing anything.\n");
201 Con *ws = con_get_workspace(con);
203 /* 1: detach from parent container */
204 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
205 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
207 /* 2: kill parent container */
208 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
209 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
210 tree_close(con->parent, DONT_KILL_WINDOW, false);
212 /* 3: re-attach to the parent of the currently focused con on the workspace
213 * this floating con was on */
214 Con *focused = con_descend_tiling_focused(ws);
216 /* if there is no other container on this workspace, focused will be the
217 * workspace itself */
218 if (focused->type == CT_WORKSPACE)
219 con->parent = focused;
220 else con->parent = focused->parent;
222 /* con_fix_percent will adjust the percent value */
225 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
226 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
228 con->floating = FLOATING_USER_OFF;
230 con_fix_percent(con->parent);
231 // TODO: don’t influence focus handling when Con was not focused before.
236 * Toggles floating mode for the given container.
238 * If the automatic flag is set to true, this was an automatic update by a change of the
239 * window class from the application which can be overwritten by the user.
242 void toggle_floating_mode(Con *con, bool automatic) {
243 /* see if the client is already floating */
244 if (con_is_floating(con)) {
245 LOG("already floating, re-setting to tiling\n");
247 floating_disable(con, automatic);
251 floating_enable(con, automatic);
255 * Raises the given container in the list of floating containers
258 void floating_raise_con(Con *con) {
259 DLOG("Raising floating con %p / %s\n", con, con->name);
260 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
261 TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
265 * Checks if con’s coordinates are within its workspace and re-assigns it to
266 * the actual workspace if not.
269 bool floating_maybe_reassign_ws(Con *con) {
270 Output *output = get_output_containing(
271 con->rect.x + (con->rect.width / 2),
272 con->rect.y + (con->rect.height / 2));
275 ELOG("No output found at destination coordinates?\n");
279 if (con_get_output(con) == output->con) {
280 DLOG("still the same ws\n");
284 DLOG("Need to re-assign!\n");
286 Con *content = output_get_content(output->con);
287 Con *ws = TAILQ_FIRST(&(content->focus_head));
288 DLOG("Moving con %p / %s to workspace %p / %s\n", con, con->name, ws, ws->name);
289 con_move_to_workspace(con, ws, true);
290 con_focus(con_descend_focused(con));
294 DRAGGING_CB(drag_window_callback) {
295 struct xcb_button_press_event_t *event = extra;
297 /* Reposition the client correctly while moving */
298 con->rect.x = old_rect->x + (new_x - event->root_x);
299 con->rect.y = old_rect->y + (new_y - event->root_y);
301 render_con(con, false);
305 /* Check if we cross workspace boundaries while moving */
306 if (!floating_maybe_reassign_ws(con))
312 * Called when the user clicked on the titlebar of a floating window.
313 * Calls the drag_pointer function with the drag_window callback
316 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
317 DLOG("floating_drag_window\n");
319 /* Push changes before dragging, so that the window gets raised now and not
320 * after the user releases the mouse button */
323 /* Drag the window */
324 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
329 * This is an ugly data structure which we need because there is no standard
330 * way of having nested functions (only available as a gcc extension at the
331 * moment, clang doesn’t support it) or blocks (only available as a clang
332 * extension and only on Mac OS X systems at the moment).
335 struct resize_window_callback_params {
338 xcb_button_press_event_t *event;
341 DRAGGING_CB(resize_window_callback) {
342 struct resize_window_callback_params *params = extra;
343 xcb_button_press_event_t *event = params->event;
344 border_t corner = params->corner;
346 int32_t dest_x = con->rect.x;
347 int32_t dest_y = con->rect.y;
349 uint32_t dest_height;
351 double ratio = (double) old_rect->width / old_rect->height;
353 /* First guess: We resize by exactly the amount the mouse moved,
354 * taking into account in which corner the client was grabbed */
355 if (corner & BORDER_LEFT)
356 dest_width = old_rect->width - (new_x - event->root_x);
357 else dest_width = old_rect->width + (new_x - event->root_x);
359 if (corner & BORDER_TOP)
360 dest_height = old_rect->height - (new_y - event->root_y);
361 else dest_height = old_rect->height + (new_y - event->root_y);
363 /* Obey minimum window size */
364 Rect minimum = con_minimum_size(con);
365 dest_width = max(dest_width, minimum.width);
366 dest_height = max(dest_height, minimum.height);
368 /* User wants to keep proportions, so we may have to adjust our values */
369 if (params->proportional) {
370 dest_width = max(dest_width, (int) (dest_height * ratio));
371 dest_height = max(dest_height, (int) (dest_width / ratio));
374 /* If not the lower right corner is grabbed, we must also reposition
375 * the client by exactly the amount we resized it */
376 if (corner & BORDER_LEFT)
377 dest_x = old_rect->x + (old_rect->width - dest_width);
379 if (corner & BORDER_TOP)
380 dest_y = old_rect->y + (old_rect->height - dest_height);
382 con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
384 /* TODO: don’t re-render the whole tree just because we change
385 * coordinates of a floating window */
387 x_push_changes(croot);
391 * Called when the user clicked on a floating window while holding the
392 * floating_modifier and the right mouse button.
393 * Calls the drag_pointer function with the resize_window callback
396 void floating_resize_window(Con *con, bool proportional,
397 xcb_button_press_event_t *event) {
398 DLOG("floating_resize_window\n");
400 /* corner saves the nearest corner to the original click. It contains
401 * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
404 if (event->event_x <= (con->rect.width / 2))
405 corner |= BORDER_LEFT;
406 else corner |= BORDER_RIGHT;
408 if (event->event_y <= (con->rect.height / 2))
409 corner |= BORDER_TOP;
410 else corner |= BORDER_BOTTOM;
412 struct resize_window_callback_params params = { corner, proportional, event };
414 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, ¶ms);
418 * This function grabs your pointer and lets you drag stuff around (borders).
419 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
420 * and the given callback will be called with the parameters specified (client,
421 * border on which the click originally was), the original rect of the client,
422 * the event and the new coordinates (x, y).
425 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
426 confine_to, border_t border, callback_t callback, void *extra)
428 uint32_t new_x, new_y;
431 memcpy(&old_rect, &(con->rect), sizeof(Rect));
433 /* Grab the pointer */
434 xcb_grab_pointer_cookie_t cookie;
435 xcb_grab_pointer_reply_t *reply;
436 cookie = xcb_grab_pointer(conn,
437 false, /* get all pointer events specified by the following mask */
438 root, /* grab the root window */
439 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
440 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
441 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
442 confine_to, /* confine_to = in which window should the cursor stay */
443 XCB_NONE, /* don’t display a special cursor */
446 if ((reply = xcb_grab_pointer_reply(conn, cookie, NULL)) == NULL) {
447 ELOG("Could not grab pointer\n");
453 /* Go into our own event loop */
456 xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
457 bool loop_done = false;
458 /* I’ve always wanted to have my own eventhandler… */
459 while (!loop_done && (inside_event = xcb_wait_for_event(conn))) {
460 /* We now handle all events we can get using xcb_poll_for_event */
462 /* skip x11 errors */
463 if (inside_event->response_type == 0) {
467 /* Strip off the highest bit (set if the event is generated) */
468 int type = (inside_event->response_type & 0x7F);
471 case XCB_BUTTON_RELEASE:
475 case XCB_MOTION_NOTIFY:
476 /* motion_notify events are saved for later */
477 FREE(last_motion_notify);
478 last_motion_notify = inside_event;
481 case XCB_UNMAP_NOTIFY:
483 case XCB_KEY_RELEASE:
484 DLOG("Unmap-notify, aborting\n");
485 handle_event(type, inside_event);
490 DLOG("Passing to original handler\n");
491 /* Use original handler */
492 handle_event(type, inside_event);
495 if (last_motion_notify != inside_event)
497 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
499 if (last_motion_notify == NULL)
502 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
503 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
505 callback(con, &old_rect, new_x, new_y, extra);
506 FREE(last_motion_notify);
509 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
515 * Changes focus in the given direction for floating clients.
517 * Changing to the left/right means going to the previous/next floating client,
518 * changing to top/bottom means cycling through the Z-index.
521 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
522 DLOG("floating focus\n");
524 if (direction == D_LEFT || direction == D_RIGHT) {
525 /* Go to the next/previous floating client */
528 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
529 TAILQ_NEXT(currently_focused, floating_clients))) !=
530 TAILQ_END(&(currently_focused->workspace->floating_clients))) {
531 if (!client->floating)
533 set_focus(conn, client, true);
540 * Moves the client 10px to the specified direction.
543 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
544 DLOG("floating move\n");
546 Rect destination = currently_focused->rect;
547 Rect *screen = &(currently_focused->workspace->output->rect);
562 /* to make static analyzers happy */
567 /* Prevent windows from vanishing completely */
568 if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
569 (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
570 (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
571 (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
572 DLOG("boundary check failed, not moving\n");
576 currently_focused->rect = destination;
577 reposition_client(conn, currently_focused);
579 /* Because reposition_client does not send a faked configure event (only resize does),
580 * we need to initiate that on our own */
581 fake_absolute_configure_notify(conn, currently_focused);
582 /* fake_absolute_configure_notify flushes */
586 * Hides all floating clients (or show them if they are currently hidden) on
587 * the specified workspace.
590 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
593 workspace->floating_hidden = !workspace->floating_hidden;
594 DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
595 TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
596 if (workspace->floating_hidden)
597 client_unmap(conn, client);
598 else client_map(conn, client);
601 /* If we just unmapped all floating windows we should ensure that the focus
602 * is set correctly, that ist, to the first non-floating client in stack */
603 if (workspace->floating_hidden)
604 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
605 if (client_is_floating(client))
607 set_focus(conn, client, true);