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 = true;
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);
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);
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 nc->parent = con_get_workspace(con);
85 /* check if the parent container is empty and close it if so */
86 if ((con->parent->type == CT_CON || con->parent->type == CT_FLOATING_CON) && con_num_children(con->parent) == 0) {
87 DLOG("Old container empty after setting this child to floating, closing\n");
88 tree_close(con->parent, false, false);
92 asprintf(&name, "[i3 con] floatingcon around %p", con);
96 /* find the height for the decorations */
97 int deco_height = config.font.height + 5;
99 DLOG("Original rect: (%d, %d) with %d x %d\n", con->rect.x, con->rect.y, con->rect.width, con->rect.height);
100 Rect zero = { 0, 0, 0, 0 };
101 nc->rect = con->geometry;
102 /* If the geometry was not set (split containers), we need to determine a
103 * sensible one by combining the geometry of all children */
104 if (memcmp(&(nc->rect), &zero, sizeof(Rect)) == 0) {
105 DLOG("Geometry not set, combining children\n");
107 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
108 DLOG("child geometry: %d x %d\n", child->geometry.width, child->geometry.height);
109 nc->rect.width += child->geometry.width;
110 nc->rect.height = max(nc->rect.height, child->geometry.height);
113 /* Raise the width/height to at least 75x50 (minimum size for windows) */
114 nc->rect.width = max(nc->rect.width, 75);
115 nc->rect.height = max(nc->rect.height, 50);
116 /* add pixels for the decoration */
117 /* TODO: don’t add them when the user automatically puts new windows into
118 * 1pixel/borderless mode */
119 nc->rect.height += deco_height + 4;
121 DLOG("Floating rect: (%d, %d) with %d x %d\n", nc->rect.x, nc->rect.y, nc->rect.width, nc->rect.height);
122 nc->orientation = NO_ORIENTATION;
123 nc->type = CT_FLOATING_CON;
124 TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
125 TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
127 /* 3: attach the child to the new parent container */
130 con->floating = FLOATING_USER_ON;
132 /* Some clients (like GIMP’s color picker window) get mapped
133 * to (0, 0), so we push them to a reasonable position
134 * (centered over their leader) */
135 if (nc->rect.x == 0 && nc->rect.y == 0) {
137 if (con->window && con->window->leader != XCB_NONE &&
138 (leader = con_by_window_id(con->window->leader)) != NULL) {
139 DLOG("Centering above leader\n");
140 nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
141 nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
143 /* center the window on workspace as fallback */
144 Con *ws = nc->parent;
145 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
146 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
150 /* render the cons to get initial window_rect correct */
151 render_con(nc, false);
152 render_con(con, false);
154 TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
155 TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
156 // TODO: don’t influence focus handling when Con was not focused before.
161 void floating_disable(Con *con, bool automatic) {
162 if (!con_is_floating(con)) {
163 LOG("Container isn't floating, not doing anything.\n");
167 /* 1: detach from parent container */
168 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
169 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
171 /* 2: kill parent container */
172 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
173 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
174 tree_close(con->parent, false, false);
176 /* 3: re-attach to the parent of the currently focused con on the workspace
177 * this floating con was on */
178 Con *focused = con_descend_tiling_focused(con_get_workspace(con));
180 /* if there is no other container on this workspace, focused will be the
181 * workspace itself */
182 if (focused->type == CT_WORKSPACE)
183 con->parent = focused;
184 else con->parent = focused->parent;
186 /* con_fix_percent will adjust the percent value */
189 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
190 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
192 con->floating = FLOATING_USER_OFF;
194 con_fix_percent(con->parent);
195 // TODO: don’t influence focus handling when Con was not focused before.
200 * Toggles floating mode for the given container.
202 * If the automatic flag is set to true, this was an automatic update by a change of the
203 * window class from the application which can be overwritten by the user.
206 void toggle_floating_mode(Con *con, bool automatic) {
207 /* see if the client is already floating */
208 if (con_is_floating(con)) {
209 LOG("already floating, re-setting to tiling\n");
211 floating_disable(con, automatic);
215 floating_enable(con, automatic);
219 * Raises the given container in the list of floating containers
222 void floating_raise_con(Con *con) {
223 DLOG("Raising floating con %p / %s\n", con, con->name);
224 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
225 TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
228 DRAGGING_CB(drag_window_callback) {
229 struct xcb_button_press_event_t *event = extra;
231 /* Reposition the client correctly while moving */
232 con->rect.x = old_rect->x + (new_x - event->root_x);
233 con->rect.y = old_rect->y + (new_y - event->root_y);
234 /* TODO: don’t re-render the whole tree just because we change
235 * coordinates of a floating window */
237 x_push_changes(croot);
241 * Called when the user clicked on the titlebar of a floating window.
242 * Calls the drag_pointer function with the drag_window callback
245 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
246 DLOG("floating_drag_window\n");
248 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
253 * This is an ugly data structure which we need because there is no standard
254 * way of having nested functions (only available as a gcc extension at the
255 * moment, clang doesn’t support it) or blocks (only available as a clang
256 * extension and only on Mac OS X systems at the moment).
259 struct resize_window_callback_params {
262 xcb_button_press_event_t *event;
265 DRAGGING_CB(resize_window_callback) {
266 struct resize_window_callback_params *params = extra;
267 xcb_button_press_event_t *event = params->event;
268 border_t corner = params->corner;
270 int32_t dest_x = con->rect.x;
271 int32_t dest_y = con->rect.y;
273 uint32_t dest_height;
275 double ratio = (double) old_rect->width / old_rect->height;
277 /* First guess: We resize by exactly the amount the mouse moved,
278 * taking into account in which corner the client was grabbed */
279 if (corner & BORDER_LEFT)
280 dest_width = old_rect->width - (new_x - event->root_x);
281 else dest_width = old_rect->width + (new_x - event->root_x);
283 if (corner & BORDER_TOP)
284 dest_height = old_rect->height - (new_y - event->root_y);
285 else dest_height = old_rect->height + (new_y - event->root_y);
287 /* Obey minimum window size */
288 Rect minimum = con_minimum_size(con);
289 dest_width = max(dest_width, minimum.width);
290 dest_height = max(dest_height, minimum.height);
292 /* User wants to keep proportions, so we may have to adjust our values */
293 if (params->proportional) {
294 dest_width = max(dest_width, (int) (dest_height * ratio));
295 dest_height = max(dest_height, (int) (dest_width / ratio));
298 /* If not the lower right corner is grabbed, we must also reposition
299 * the client by exactly the amount we resized it */
300 if (corner & BORDER_LEFT)
301 dest_x = old_rect->x + (old_rect->width - dest_width);
303 if (corner & BORDER_TOP)
304 dest_y = old_rect->y + (old_rect->height - dest_height);
306 con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
308 /* TODO: don’t re-render the whole tree just because we change
309 * coordinates of a floating window */
311 x_push_changes(croot);
315 * Called when the user clicked on a floating window while holding the
316 * floating_modifier and the right mouse button.
317 * Calls the drag_pointer function with the resize_window callback
320 void floating_resize_window(Con *con, bool proportional,
321 xcb_button_press_event_t *event) {
322 DLOG("floating_resize_window\n");
324 /* corner saves the nearest corner to the original click. It contains
325 * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
328 if (event->event_x <= (con->rect.width / 2))
329 corner |= BORDER_LEFT;
330 else corner |= BORDER_RIGHT;
332 if (event->event_y <= (con->rect.height / 2))
333 corner |= BORDER_TOP;
334 else corner |= BORDER_RIGHT;
336 struct resize_window_callback_params params = { corner, proportional, event };
338 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, ¶ms);
342 * This function grabs your pointer and lets you drag stuff around (borders).
343 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
344 * and the given callback will be called with the parameters specified (client,
345 * border on which the click originally was), the original rect of the client,
346 * the event and the new coordinates (x, y).
349 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
350 confine_to, border_t border, callback_t callback, void *extra)
352 uint32_t new_x, new_y;
355 memcpy(&old_rect, &(con->rect), sizeof(Rect));
357 /* Grab the pointer */
358 /* TODO: returncode */
359 xcb_grab_pointer(conn,
360 false, /* get all pointer events specified by the following mask */
361 root, /* grab the root window */
362 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
363 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
364 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
365 confine_to, /* confine_to = in which window should the cursor stay */
366 XCB_NONE, /* don’t display a special cursor */
369 /* Go into our own event loop */
372 xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
373 /* I’ve always wanted to have my own eventhandler… */
374 while ((inside_event = xcb_wait_for_event(conn))) {
375 /* We now handle all events we can get using xcb_poll_for_event */
377 /* skip x11 errors */
378 if (inside_event->response_type == 0) {
382 /* Strip off the highest bit (set if the event is generated) */
383 int type = (inside_event->response_type & 0x7F);
386 case XCB_BUTTON_RELEASE:
389 case XCB_MOTION_NOTIFY:
390 /* motion_notify events are saved for later */
391 FREE(last_motion_notify);
392 last_motion_notify = inside_event;
395 case XCB_UNMAP_NOTIFY:
396 DLOG("Unmap-notify, aborting\n");
397 handle_event(type, inside_event);
401 DLOG("Passing to original handler\n");
402 /* Use original handler */
403 handle_event(type, inside_event);
406 if (last_motion_notify != inside_event)
408 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
410 if (last_motion_notify == NULL)
413 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
414 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
416 callback(con, &old_rect, new_x, new_y, extra);
417 FREE(last_motion_notify);
420 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
426 * Changes focus in the given direction for floating clients.
428 * Changing to the left/right means going to the previous/next floating client,
429 * changing to top/bottom means cycling through the Z-index.
432 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
433 DLOG("floating focus\n");
435 if (direction == D_LEFT || direction == D_RIGHT) {
436 /* Go to the next/previous floating client */
439 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
440 TAILQ_NEXT(currently_focused, floating_clients))) !=
441 TAILQ_END(&(currently_focused->workspace->floating_clients))) {
442 if (!client->floating)
444 set_focus(conn, client, true);
451 * Moves the client 10px to the specified direction.
454 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
455 DLOG("floating move\n");
457 Rect destination = currently_focused->rect;
458 Rect *screen = &(currently_focused->workspace->output->rect);
473 /* to make static analyzers happy */
478 /* Prevent windows from vanishing completely */
479 if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
480 (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
481 (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
482 (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
483 DLOG("boundary check failed, not moving\n");
487 currently_focused->rect = destination;
488 reposition_client(conn, currently_focused);
490 /* Because reposition_client does not send a faked configure event (only resize does),
491 * we need to initiate that on our own */
492 fake_absolute_configure_notify(conn, currently_focused);
493 /* fake_absolute_configure_notify flushes */
497 * Hides all floating clients (or show them if they are currently hidden) on
498 * the specified workspace.
501 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
504 workspace->floating_hidden = !workspace->floating_hidden;
505 DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
506 TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
507 if (workspace->floating_hidden)
508 client_unmap(conn, client);
509 else client_map(conn, client);
512 /* If we just unmapped all floating windows we should ensure that the focus
513 * is set correctly, that ist, to the first non-floating client in stack */
514 if (workspace->floating_hidden)
515 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
516 if (client_is_floating(client))
518 set_focus(conn, client, true);