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 i3Font *font = load_font(conn, config.font);
98 int deco_height = 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 nc->rect = con->rect;
102 /* add pixels for the decoration */
103 /* TODO: don’t add them when the user automatically puts new windows into
104 * 1pixel/borderless mode */
105 nc->rect.height += deco_height + 4;
107 DLOG("Floating rect: (%d, %d) with %d x %d\n", nc->rect.x, nc->rect.y, nc->rect.width, nc->rect.height);
108 nc->orientation = NO_ORIENTATION;
109 nc->type = CT_FLOATING_CON;
110 TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
111 TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
113 /* 3: attach the child to the new parent container */
116 con->floating = FLOATING_USER_ON;
118 /* Some clients (like GIMP’s color picker window) get mapped
119 * to (0, 0), so we push them to a reasonable position
120 * (centered over their leader) */
121 if (nc->rect.x == 0 && nc->rect.y == 0) {
123 if (con->window && con->window->leader != XCB_NONE &&
124 (leader = con_by_window_id(con->window->leader)) != NULL) {
125 DLOG("Centering above leader\n");
126 nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
127 nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
129 /* center the window on workspace as fallback */
130 Con *ws = nc->parent;
131 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
132 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
136 /* render the cons to get initial window_rect correct */
137 render_con(nc, false);
138 render_con(con, false);
140 TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
141 TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
142 // TODO: don’t influence focus handling when Con was not focused before.
147 void floating_disable(Con *con, bool automatic) {
148 if (!con_is_floating(con)) {
149 LOG("Container isn't floating, not doing anything.\n");
153 /* 1: detach from parent container */
154 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
155 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
157 /* 2: kill parent container */
158 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
159 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
160 tree_close(con->parent, false, false);
162 /* 3: re-attach to the parent of the currently focused con on the workspace
163 * this floating con was on */
164 Con *focused = con_descend_focused(con_get_workspace(con));
165 /* if there is no other container on this workspace, focused will be the
166 * workspace itself */
167 if (focused->type == CT_WORKSPACE)
168 con->parent = focused;
169 else con->parent = focused->parent;
171 /* con_fix_percent will adjust the percent value */
174 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
175 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
177 con->floating = FLOATING_USER_OFF;
179 con_fix_percent(con->parent);
180 // TODO: don’t influence focus handling when Con was not focused before.
185 * Toggles floating mode for the given container.
187 * If the automatic flag is set to true, this was an automatic update by a change of the
188 * window class from the application which can be overwritten by the user.
191 void toggle_floating_mode(Con *con, bool automatic) {
192 /* see if the client is already floating */
193 if (con_is_floating(con)) {
194 LOG("already floating, re-setting to tiling\n");
196 floating_disable(con, automatic);
200 floating_enable(con, automatic);
204 * Raises the given container in the list of floating containers
207 void floating_raise_con(Con *con) {
208 DLOG("Raising floating con %p / %s\n", con, con->name);
209 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
210 TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
213 DRAGGING_CB(drag_window_callback) {
214 struct xcb_button_press_event_t *event = extra;
216 /* Reposition the client correctly while moving */
217 con->rect.x = old_rect->x + (new_x - event->root_x);
218 con->rect.y = old_rect->y + (new_y - event->root_y);
219 /* TODO: don’t re-render the whole tree just because we change
220 * coordinates of a floating window */
222 x_push_changes(croot);
226 * Called when the user clicked on the titlebar of a floating window.
227 * Calls the drag_pointer function with the drag_window callback
230 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
231 DLOG("floating_drag_window\n");
233 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
238 * This is an ugly data structure which we need because there is no standard
239 * way of having nested functions (only available as a gcc extension at the
240 * moment, clang doesn’t support it) or blocks (only available as a clang
241 * extension and only on Mac OS X systems at the moment).
244 struct resize_window_callback_params {
247 xcb_button_press_event_t *event;
250 DRAGGING_CB(resize_window_callback) {
251 struct resize_window_callback_params *params = extra;
252 xcb_button_press_event_t *event = params->event;
253 border_t corner = params->corner;
255 int32_t dest_x = con->rect.x;
256 int32_t dest_y = con->rect.y;
258 uint32_t dest_height;
260 double ratio = (double) old_rect->width / old_rect->height;
262 /* First guess: We resize by exactly the amount the mouse moved,
263 * taking into account in which corner the client was grabbed */
264 if (corner & BORDER_LEFT)
265 dest_width = old_rect->width - (new_x - event->root_x);
266 else dest_width = old_rect->width + (new_x - event->root_x);
268 if (corner & BORDER_TOP)
269 dest_height = old_rect->height - (new_y - event->root_y);
270 else dest_height = old_rect->height + (new_y - event->root_y);
272 /* TODO: minimum window size */
274 /* Obey minimum window size */
275 dest_width = max(dest_width, client_min_width(client));
276 dest_height = max(dest_height, client_min_height(client));
279 /* User wants to keep proportions, so we may have to adjust our values */
280 if (params->proportional) {
281 dest_width = max(dest_width, (int) (dest_height * ratio));
282 dest_height = max(dest_height, (int) (dest_width / ratio));
285 /* If not the lower right corner is grabbed, we must also reposition
286 * the client by exactly the amount we resized it */
287 if (corner & BORDER_LEFT)
288 dest_x = old_rect->x + (old_rect->width - dest_width);
290 if (corner & BORDER_TOP)
291 dest_y = old_rect->y + (old_rect->height - dest_height);
293 con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
295 /* TODO: don’t re-render the whole tree just because we change
296 * coordinates of a floating window */
298 x_push_changes(croot);
302 * Called when the user clicked on a floating window while holding the
303 * floating_modifier and the right mouse button.
304 * Calls the drag_pointer function with the resize_window callback
307 void floating_resize_window(Con *con, bool proportional,
308 xcb_button_press_event_t *event) {
309 DLOG("floating_resize_window\n");
311 /* corner saves the nearest corner to the original click. It contains
312 * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
315 if (event->event_x <= (con->rect.width / 2))
316 corner |= BORDER_LEFT;
317 else corner |= BORDER_RIGHT;
319 if (event->event_y <= (con->rect.height / 2))
320 corner |= BORDER_TOP;
321 else corner |= BORDER_RIGHT;
323 struct resize_window_callback_params params = { corner, proportional, event };
325 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, ¶ms);
329 * This function grabs your pointer and lets you drag stuff around (borders).
330 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
331 * and the given callback will be called with the parameters specified (client,
332 * border on which the click originally was), the original rect of the client,
333 * the event and the new coordinates (x, y).
336 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
337 confine_to, border_t border, callback_t callback, void *extra)
339 uint32_t new_x, new_y;
342 memcpy(&old_rect, &(con->rect), sizeof(Rect));
344 /* Grab the pointer */
345 /* TODO: returncode */
346 xcb_grab_pointer(conn,
347 false, /* get all pointer events specified by the following mask */
348 root, /* grab the root window */
349 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
350 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
351 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
352 confine_to, /* confine_to = in which window should the cursor stay */
353 XCB_NONE, /* don’t display a special cursor */
356 /* Go into our own event loop */
359 xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
360 /* I’ve always wanted to have my own eventhandler… */
361 while ((inside_event = xcb_wait_for_event(conn))) {
362 /* We now handle all events we can get using xcb_poll_for_event */
364 /* Same as get_event_handler in xcb */
365 int nr = inside_event->response_type;
367 /* An error occured */
368 //handle_event(NULL, conn, inside_event);
373 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
377 case XCB_BUTTON_RELEASE:
380 case XCB_MOTION_NOTIFY:
381 /* motion_notify events are saved for later */
382 FREE(last_motion_notify);
383 last_motion_notify = inside_event;
386 case XCB_UNMAP_NOTIFY:
387 DLOG("Unmap-notify, aborting\n");
388 xcb_event_handle(&evenths, inside_event);
392 DLOG("Passing to original handler\n");
393 /* Use original handler */
394 xcb_event_handle(&evenths, inside_event);
397 if (last_motion_notify != inside_event)
399 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
401 if (last_motion_notify == NULL)
404 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
405 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
407 callback(con, &old_rect, new_x, new_y, extra);
408 FREE(last_motion_notify);
411 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
417 * Changes focus in the given direction for floating clients.
419 * Changing to the left/right means going to the previous/next floating client,
420 * changing to top/bottom means cycling through the Z-index.
423 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
424 DLOG("floating focus\n");
426 if (direction == D_LEFT || direction == D_RIGHT) {
427 /* Go to the next/previous floating client */
430 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
431 TAILQ_NEXT(currently_focused, floating_clients))) !=
432 TAILQ_END(&(currently_focused->workspace->floating_clients))) {
433 if (!client->floating)
435 set_focus(conn, client, true);
442 * Moves the client 10px to the specified direction.
445 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
446 DLOG("floating move\n");
448 Rect destination = currently_focused->rect;
449 Rect *screen = &(currently_focused->workspace->output->rect);
464 /* to make static analyzers happy */
469 /* Prevent windows from vanishing completely */
470 if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
471 (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
472 (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
473 (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
474 DLOG("boundary check failed, not moving\n");
478 currently_focused->rect = destination;
479 reposition_client(conn, currently_focused);
481 /* Because reposition_client does not send a faked configure event (only resize does),
482 * we need to initiate that on our own */
483 fake_absolute_configure_notify(conn, currently_focused);
484 /* fake_absolute_configure_notify flushes */
488 * Hides all floating clients (or show them if they are currently hidden) on
489 * the specified workspace.
492 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
495 workspace->floating_hidden = !workspace->floating_hidden;
496 DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
497 TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
498 if (workspace->floating_hidden)
499 client_unmap(conn, client);
500 else client_map(conn, client);
503 /* If we just unmapped all floating windows we should ensure that the focus
504 * is set correctly, that ist, to the first non-floating client in stack */
505 if (workspace->floating_hidden)
506 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
507 if (client_is_floating(client))
509 set_focus(conn, client, true);