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 /* TODO: refactor this with src/con.c:con_set_layout */
34 Con *new = con_new(NULL);
36 new->orientation = con->orientation;
38 /* since the new container will be set into floating mode directly
39 * afterwards, we need to copy the workspace rect. */
40 memcpy(&(new->rect), &(con->rect), sizeof(Rect));
42 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
43 if (old_focused == TAILQ_END(&(con->focus_head)))
46 /* 4: move the existing cons of this workspace below the new con */
47 DLOG("Moving cons\n");
49 while (!TAILQ_EMPTY(&(con->nodes_head))) {
50 child = TAILQ_FIRST(&(con->nodes_head));
52 con_attach(child, new, true);
55 /* 4: attach the new split container to the workspace */
56 DLOG("Attaching new split to ws\n");
57 con_attach(new, con, false);
60 con_focus(old_focused);
66 /* 1: detach the container from its parent */
67 /* TODO: refactor this with tree_close() */
68 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
69 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
71 con_fix_percent(con->parent);
73 /* 2: create a new container to render the decoration on, add
74 * it as a floating window to the workspace */
75 Con *nc = con_new(NULL);
76 /* we need to set the parent afterwards instead of passing it as an
77 * argument to con_new() because nc would be inserted into the tiling layer
79 nc->parent = con_get_workspace(con);
82 asprintf(&name, "[i3 con] floatingcon around %p", con);
86 /* find the height for the decorations */
87 i3Font *font = load_font(conn, config.font);
88 int deco_height = font->height + 5;
90 DLOG("Original rect: (%d, %d) with %d x %d\n", con->rect.x, con->rect.y, con->rect.width, con->rect.height);
92 /* add pixels for the decoration */
93 /* TODO: don’t add them when the user automatically puts new windows into
94 * 1pixel/borderless mode */
95 nc->rect.height += deco_height + 4;
97 DLOG("Floating rect: (%d, %d) with %d x %d\n", nc->rect.x, nc->rect.y, nc->rect.width, nc->rect.height);
98 nc->orientation = NO_ORIENTATION;
99 nc->type = CT_FLOATING_CON;
100 TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
101 TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
103 /* 3: attach the child to the new parent container */
105 con->floating = FLOATING_USER_ON;
107 /* Some clients (like GIMP’s color picker window) get mapped
108 * to (0, 0), so we push them to a reasonable position
109 * (centered over their leader) */
110 if (nc->rect.x == 0 && nc->rect.y == 0) {
112 if (con->window && con->window->leader != XCB_NONE &&
113 (leader = con_by_window_id(con->window->leader)) != NULL) {
114 DLOG("Centering above leader\n");
115 nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
116 nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
118 /* center the window on workspace as fallback */
119 Con *ws = nc->parent;
120 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
121 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
125 /* render the cons to get initial window_rect correct */
126 render_con(nc, false);
127 render_con(con, false);
129 TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
130 TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
131 // TODO: don’t influence focus handling when Con was not focused before.
136 void floating_disable(Con *con, bool automatic) {
137 if (!con_is_floating(con)) {
138 LOG("Container isn't floating, not doing anything.\n");
142 /* 1: detach from parent container */
143 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
144 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
146 /* 2: kill parent container */
147 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
148 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
149 tree_close(con->parent, false, false);
151 /* 3: re-attach to previous parent */
152 con->parent = con_get_workspace(con);
153 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
154 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
156 con->floating = FLOATING_USER_OFF;
158 con_fix_percent(con->parent);
159 // TODO: don’t influence focus handling when Con was not focused before.
164 * Toggles floating mode for the given container.
166 * If the automatic flag is set to true, this was an automatic update by a change of the
167 * window class from the application which can be overwritten by the user.
170 void toggle_floating_mode(Con *con, bool automatic) {
171 /* see if the client is already floating */
172 if (con_is_floating(con)) {
173 LOG("already floating, re-setting to tiling\n");
175 floating_disable(con, automatic);
179 floating_enable(con, automatic);
183 * Raises the given container in the list of floating containers
186 void floating_raise_con(Con *con) {
187 DLOG("Raising floating con %p / %s\n", con, con->name);
188 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
189 TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
192 DRAGGING_CB(drag_window_callback) {
193 struct xcb_button_press_event_t *event = extra;
195 /* Reposition the client correctly while moving */
196 con->rect.x = old_rect->x + (new_x - event->root_x);
197 con->rect.y = old_rect->y + (new_y - event->root_y);
198 /* TODO: don’t re-render the whole tree just because we change
199 * coordinates of a floating window */
201 x_push_changes(croot);
205 * Called when the user clicked on the titlebar of a floating window.
206 * Calls the drag_pointer function with the drag_window callback
209 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
210 DLOG("floating_drag_window\n");
212 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
217 * This is an ugly data structure which we need because there is no standard
218 * way of having nested functions (only available as a gcc extension at the
219 * moment, clang doesn’t support it) or blocks (only available as a clang
220 * extension and only on Mac OS X systems at the moment).
223 struct resize_window_callback_params {
226 xcb_button_press_event_t *event;
229 DRAGGING_CB(resize_window_callback) {
230 struct resize_window_callback_params *params = extra;
231 xcb_button_press_event_t *event = params->event;
232 border_t corner = params->corner;
234 int32_t dest_x = con->rect.x;
235 int32_t dest_y = con->rect.y;
237 uint32_t dest_height;
239 double ratio = (double) old_rect->width / old_rect->height;
241 /* First guess: We resize by exactly the amount the mouse moved,
242 * taking into account in which corner the client was grabbed */
243 if (corner & BORDER_LEFT)
244 dest_width = old_rect->width - (new_x - event->root_x);
245 else dest_width = old_rect->width + (new_x - event->root_x);
247 if (corner & BORDER_TOP)
248 dest_height = old_rect->height - (new_y - event->root_y);
249 else dest_height = old_rect->height + (new_y - event->root_y);
251 /* TODO: minimum window size */
253 /* Obey minimum window size */
254 dest_width = max(dest_width, client_min_width(client));
255 dest_height = max(dest_height, client_min_height(client));
258 /* User wants to keep proportions, so we may have to adjust our values */
259 if (params->proportional) {
260 dest_width = max(dest_width, (int) (dest_height * ratio));
261 dest_height = max(dest_height, (int) (dest_width / ratio));
264 /* If not the lower right corner is grabbed, we must also reposition
265 * the client by exactly the amount we resized it */
266 if (corner & BORDER_LEFT)
267 dest_x = old_rect->x + (old_rect->width - dest_width);
269 if (corner & BORDER_TOP)
270 dest_y = old_rect->y + (old_rect->height - dest_height);
272 con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
274 /* TODO: don’t re-render the whole tree just because we change
275 * coordinates of a floating window */
277 x_push_changes(croot);
281 * Called when the user clicked on a floating window while holding the
282 * floating_modifier and the right mouse button.
283 * Calls the drag_pointer function with the resize_window callback
286 void floating_resize_window(Con *con, bool proportional,
287 xcb_button_press_event_t *event) {
288 DLOG("floating_resize_window\n");
290 /* corner saves the nearest corner to the original click. It contains
291 * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
294 if (event->event_x <= (con->rect.width / 2))
295 corner |= BORDER_LEFT;
296 else corner |= BORDER_RIGHT;
298 if (event->event_y <= (con->rect.height / 2))
299 corner |= BORDER_TOP;
300 else corner |= BORDER_RIGHT;
302 struct resize_window_callback_params params = { corner, proportional, event };
304 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, ¶ms);
308 * This function grabs your pointer and lets you drag stuff around (borders).
309 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
310 * and the given callback will be called with the parameters specified (client,
311 * border on which the click originally was), the original rect of the client,
312 * the event and the new coordinates (x, y).
315 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
316 confine_to, border_t border, callback_t callback, void *extra)
318 xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
319 uint32_t new_x, new_y;
322 memcpy(&old_rect, &(con->rect), sizeof(Rect));
324 /* Grab the pointer */
325 /* TODO: returncode */
326 xcb_grab_pointer(conn,
327 false, /* get all pointer events specified by the following mask */
328 root, /* grab the root window */
329 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
330 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
331 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
332 confine_to, /* confine_to = in which window should the cursor stay */
333 XCB_NONE, /* don’t display a special cursor */
336 /* Go into our own event loop */
339 xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
340 /* I’ve always wanted to have my own eventhandler… */
341 while ((inside_event = xcb_wait_for_event(conn))) {
342 /* We now handle all events we can get using xcb_poll_for_event */
344 /* Same as get_event_handler in xcb */
345 int nr = inside_event->response_type;
347 /* An error occured */
348 //handle_event(NULL, conn, inside_event);
353 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
357 case XCB_BUTTON_RELEASE:
360 case XCB_MOTION_NOTIFY:
361 /* motion_notify events are saved for later */
362 FREE(last_motion_notify);
363 last_motion_notify = inside_event;
366 case XCB_UNMAP_NOTIFY:
367 DLOG("Unmap-notify, aborting\n");
368 xcb_event_handle(&evenths, inside_event);
372 DLOG("Passing to original handler\n");
373 /* Use original handler */
374 xcb_event_handle(&evenths, inside_event);
377 if (last_motion_notify != inside_event)
379 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
381 if (last_motion_notify == NULL)
384 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
385 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
387 callback(con, &old_rect, new_x, new_y, extra);
388 FREE(last_motion_notify);
391 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
397 * Changes focus in the given direction for floating clients.
399 * Changing to the left/right means going to the previous/next floating client,
400 * changing to top/bottom means cycling through the Z-index.
403 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
404 DLOG("floating focus\n");
406 if (direction == D_LEFT || direction == D_RIGHT) {
407 /* Go to the next/previous floating client */
410 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
411 TAILQ_NEXT(currently_focused, floating_clients))) !=
412 TAILQ_END(&(currently_focused->workspace->floating_clients))) {
413 if (!client->floating)
415 set_focus(conn, client, true);
422 * Moves the client 10px to the specified direction.
425 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
426 DLOG("floating move\n");
428 Rect destination = currently_focused->rect;
429 Rect *screen = &(currently_focused->workspace->output->rect);
444 /* to make static analyzers happy */
449 /* Prevent windows from vanishing completely */
450 if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
451 (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
452 (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
453 (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
454 DLOG("boundary check failed, not moving\n");
458 currently_focused->rect = destination;
459 reposition_client(conn, currently_focused);
461 /* Because reposition_client does not send a faked configure event (only resize does),
462 * we need to initiate that on our own */
463 fake_absolute_configure_notify(conn, currently_focused);
464 /* fake_absolute_configure_notify flushes */
468 * Hides all floating clients (or show them if they are currently hidden) on
469 * the specified workspace.
472 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
475 workspace->floating_hidden = !workspace->floating_hidden;
476 DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
477 TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
478 if (workspace->floating_hidden)
479 client_unmap(conn, client);
480 else client_map(conn, client);
483 /* If we just unmapped all floating windows we should ensure that the focus
484 * is set correctly, that ist, to the first non-floating client in stack */
485 if (workspace->floating_hidden)
486 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
487 if (client_is_floating(client))
489 set_focus(conn, client, true);