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 */
106 con->floating = FLOATING_USER_ON;
108 /* Some clients (like GIMP’s color picker window) get mapped
109 * to (0, 0), so we push them to a reasonable position
110 * (centered over their leader) */
111 if (nc->rect.x == 0 && nc->rect.y == 0) {
113 if (con->window && con->window->leader != XCB_NONE &&
114 (leader = con_by_window_id(con->window->leader)) != NULL) {
115 DLOG("Centering above leader\n");
116 nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
117 nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
119 /* center the window on workspace as fallback */
120 Con *ws = nc->parent;
121 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
122 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
126 /* render the cons to get initial window_rect correct */
127 render_con(nc, false);
128 render_con(con, false);
130 TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
131 TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
132 // TODO: don’t influence focus handling when Con was not focused before.
137 void floating_disable(Con *con, bool automatic) {
138 if (!con_is_floating(con)) {
139 LOG("Container isn't floating, not doing anything.\n");
143 /* 1: detach from parent container */
144 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
145 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
147 /* 2: kill parent container */
148 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
149 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
150 tree_close(con->parent, false, false);
152 /* 3: re-attach to the parent of the currently focused con on the workspace
153 * this floating con was on */
154 Con *focused = con_descend_focused(con_get_workspace(con));
155 con->parent = focused->parent;
157 /* XXX: We adjust the percentage value to start with a fair value. Floating
158 * cons always have 1.0 as percent which doesn’t work so well when
159 * re-inserting (the formerly floating con would get 50% of the target
161 con->percent = (1.0 / con_num_children(con->parent));
163 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
164 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
166 con->floating = FLOATING_USER_OFF;
168 con_fix_percent(con->parent);
169 // TODO: don’t influence focus handling when Con was not focused before.
174 * Toggles floating mode for the given container.
176 * If the automatic flag is set to true, this was an automatic update by a change of the
177 * window class from the application which can be overwritten by the user.
180 void toggle_floating_mode(Con *con, bool automatic) {
181 /* see if the client is already floating */
182 if (con_is_floating(con)) {
183 LOG("already floating, re-setting to tiling\n");
185 floating_disable(con, automatic);
189 floating_enable(con, automatic);
193 * Raises the given container in the list of floating containers
196 void floating_raise_con(Con *con) {
197 DLOG("Raising floating con %p / %s\n", con, con->name);
198 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
199 TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
202 DRAGGING_CB(drag_window_callback) {
203 struct xcb_button_press_event_t *event = extra;
205 /* Reposition the client correctly while moving */
206 con->rect.x = old_rect->x + (new_x - event->root_x);
207 con->rect.y = old_rect->y + (new_y - event->root_y);
208 /* TODO: don’t re-render the whole tree just because we change
209 * coordinates of a floating window */
211 x_push_changes(croot);
215 * Called when the user clicked on the titlebar of a floating window.
216 * Calls the drag_pointer function with the drag_window callback
219 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
220 DLOG("floating_drag_window\n");
222 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
227 * This is an ugly data structure which we need because there is no standard
228 * way of having nested functions (only available as a gcc extension at the
229 * moment, clang doesn’t support it) or blocks (only available as a clang
230 * extension and only on Mac OS X systems at the moment).
233 struct resize_window_callback_params {
236 xcb_button_press_event_t *event;
239 DRAGGING_CB(resize_window_callback) {
240 struct resize_window_callback_params *params = extra;
241 xcb_button_press_event_t *event = params->event;
242 border_t corner = params->corner;
244 int32_t dest_x = con->rect.x;
245 int32_t dest_y = con->rect.y;
247 uint32_t dest_height;
249 double ratio = (double) old_rect->width / old_rect->height;
251 /* First guess: We resize by exactly the amount the mouse moved,
252 * taking into account in which corner the client was grabbed */
253 if (corner & BORDER_LEFT)
254 dest_width = old_rect->width - (new_x - event->root_x);
255 else dest_width = old_rect->width + (new_x - event->root_x);
257 if (corner & BORDER_TOP)
258 dest_height = old_rect->height - (new_y - event->root_y);
259 else dest_height = old_rect->height + (new_y - event->root_y);
261 /* TODO: minimum window size */
263 /* Obey minimum window size */
264 dest_width = max(dest_width, client_min_width(client));
265 dest_height = max(dest_height, client_min_height(client));
268 /* User wants to keep proportions, so we may have to adjust our values */
269 if (params->proportional) {
270 dest_width = max(dest_width, (int) (dest_height * ratio));
271 dest_height = max(dest_height, (int) (dest_width / ratio));
274 /* If not the lower right corner is grabbed, we must also reposition
275 * the client by exactly the amount we resized it */
276 if (corner & BORDER_LEFT)
277 dest_x = old_rect->x + (old_rect->width - dest_width);
279 if (corner & BORDER_TOP)
280 dest_y = old_rect->y + (old_rect->height - dest_height);
282 con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
284 /* TODO: don’t re-render the whole tree just because we change
285 * coordinates of a floating window */
287 x_push_changes(croot);
291 * Called when the user clicked on a floating window while holding the
292 * floating_modifier and the right mouse button.
293 * Calls the drag_pointer function with the resize_window callback
296 void floating_resize_window(Con *con, bool proportional,
297 xcb_button_press_event_t *event) {
298 DLOG("floating_resize_window\n");
300 /* corner saves the nearest corner to the original click. It contains
301 * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
304 if (event->event_x <= (con->rect.width / 2))
305 corner |= BORDER_LEFT;
306 else corner |= BORDER_RIGHT;
308 if (event->event_y <= (con->rect.height / 2))
309 corner |= BORDER_TOP;
310 else corner |= BORDER_RIGHT;
312 struct resize_window_callback_params params = { corner, proportional, event };
314 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, ¶ms);
318 * This function grabs your pointer and lets you drag stuff around (borders).
319 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
320 * and the given callback will be called with the parameters specified (client,
321 * border on which the click originally was), the original rect of the client,
322 * the event and the new coordinates (x, y).
325 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
326 confine_to, border_t border, callback_t callback, void *extra)
328 uint32_t new_x, new_y;
331 memcpy(&old_rect, &(con->rect), sizeof(Rect));
333 /* Grab the pointer */
334 /* TODO: returncode */
335 xcb_grab_pointer(conn,
336 false, /* get all pointer events specified by the following mask */
337 root, /* grab the root window */
338 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
339 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
340 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
341 confine_to, /* confine_to = in which window should the cursor stay */
342 XCB_NONE, /* don’t display a special cursor */
345 /* Go into our own event loop */
348 xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
349 /* I’ve always wanted to have my own eventhandler… */
350 while ((inside_event = xcb_wait_for_event(conn))) {
351 /* We now handle all events we can get using xcb_poll_for_event */
353 /* Same as get_event_handler in xcb */
354 int nr = inside_event->response_type;
356 /* An error occured */
357 //handle_event(NULL, conn, inside_event);
362 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
366 case XCB_BUTTON_RELEASE:
369 case XCB_MOTION_NOTIFY:
370 /* motion_notify events are saved for later */
371 FREE(last_motion_notify);
372 last_motion_notify = inside_event;
375 case XCB_UNMAP_NOTIFY:
376 DLOG("Unmap-notify, aborting\n");
377 xcb_event_handle(&evenths, inside_event);
381 DLOG("Passing to original handler\n");
382 /* Use original handler */
383 xcb_event_handle(&evenths, inside_event);
386 if (last_motion_notify != inside_event)
388 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
390 if (last_motion_notify == NULL)
393 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
394 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
396 callback(con, &old_rect, new_x, new_y, extra);
397 FREE(last_motion_notify);
400 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
406 * Changes focus in the given direction for floating clients.
408 * Changing to the left/right means going to the previous/next floating client,
409 * changing to top/bottom means cycling through the Z-index.
412 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
413 DLOG("floating focus\n");
415 if (direction == D_LEFT || direction == D_RIGHT) {
416 /* Go to the next/previous floating client */
419 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
420 TAILQ_NEXT(currently_focused, floating_clients))) !=
421 TAILQ_END(&(currently_focused->workspace->floating_clients))) {
422 if (!client->floating)
424 set_focus(conn, client, true);
431 * Moves the client 10px to the specified direction.
434 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
435 DLOG("floating move\n");
437 Rect destination = currently_focused->rect;
438 Rect *screen = &(currently_focused->workspace->output->rect);
453 /* to make static analyzers happy */
458 /* Prevent windows from vanishing completely */
459 if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
460 (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
461 (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
462 (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
463 DLOG("boundary check failed, not moving\n");
467 currently_focused->rect = destination;
468 reposition_client(conn, currently_focused);
470 /* Because reposition_client does not send a faked configure event (only resize does),
471 * we need to initiate that on our own */
472 fake_absolute_configure_notify(conn, currently_focused);
473 /* fake_absolute_configure_notify flushes */
477 * Hides all floating clients (or show them if they are currently hidden) on
478 * the specified workspace.
481 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
484 workspace->floating_hidden = !workspace->floating_hidden;
485 DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
486 TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
487 if (workspace->floating_hidden)
488 client_unmap(conn, client);
489 else client_map(conn, client);
492 /* If we just unmapped all floating windows we should ensure that the focus
493 * is set correctly, that ist, to the first non-floating client in stack */
494 if (workspace->floating_hidden)
495 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
496 if (client_is_floating(client))
498 set_focus(conn, client, true);