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 if (con_is_floating(con)) {
21 LOG("Container is already in floating mode, not doing anything.\n");
25 /* 1: If the container is a workspace container, we need to create a new
26 * split-container with the same orientation and make that one floating. We
27 * cannot touch the workspace container itself because floating containers
28 * are children of the workspace. */
29 if (con->type == CT_WORKSPACE) {
30 LOG("This is a workspace, creating new container around content\n");
31 /* TODO: refactor this with src/con.c:con_set_layout */
32 Con *new = con_new(NULL);
34 new->orientation = con->orientation;
36 /* since the new container will be set into floating mode directly
37 * afterwards, we need to copy the workspace rect. */
38 memcpy(&(new->rect), &(con->rect), sizeof(Rect));
40 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
41 if (old_focused == TAILQ_END(&(con->focus_head)))
44 /* 4: move the existing cons of this workspace below the new con */
45 DLOG("Moving cons\n");
47 while (!TAILQ_EMPTY(&(con->nodes_head))) {
48 child = TAILQ_FIRST(&(con->nodes_head));
50 con_attach(child, new, true);
53 /* 4: attach the new split container to the workspace */
54 DLOG("Attaching new split to ws\n");
55 con_attach(new, con, false);
58 con_focus(old_focused);
63 /* 1: detach the container from its parent */
64 /* TODO: refactor this with tree_close() */
65 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
66 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
68 con_fix_percent(con->parent, WINDOW_REMOVE);
70 /* 2: create a new container to render the decoration on, add
71 * it as a floating window to the workspace */
72 Con *nc = con_new(NULL);
73 /* we need to set the parent afterwards instead of passing it as an
74 * argument to con_new() because nc would be inserted into the tiling layer
76 nc->parent = con_get_workspace(con);
79 asprintf(&name, "[i3 con] floatingcon around %p", con);
83 /* find the height for the decorations */
84 i3Font *font = load_font(conn, config.font);
85 int deco_height = font->height + 5;
88 /* add pixels for the decoration */
89 /* TODO: don’t add them when the user automatically puts new windows into
90 * 1pixel/borderless mode */
91 nc->rect.height += deco_height + 4;
93 nc->orientation = NO_ORIENTATION;
94 nc->type = CT_FLOATING_CON;
95 TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
96 TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
98 /* 3: attach the child to the new parent container */
99 con->old_parent = con->parent;
101 con->floating = FLOATING_USER_ON;
103 /* Some clients (like GIMP’s color picker window) get mapped
104 * to (0, 0), so we push them to a reasonable position
105 * (centered over their leader) */
106 if (nc->rect.x == 0 && nc->rect.y == 0) {
108 if (con->window && con->window->leader != XCB_NONE &&
109 (leader = con_by_window_id(con->window->leader)) != NULL) {
110 DLOG("Centering above leader\n");
111 nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
112 nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
114 /* center the window on workspace as fallback */
115 Con *ws = nc->parent;
116 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
117 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
121 TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
122 TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
123 // TODO: don’t influence focus handling when Con was not focused before.
127 void floating_disable(Con *con, bool automatic) {
128 if (!con_is_floating(con)) {
129 LOG("Container isn't floating, not doing anything.\n");
133 assert(con->old_parent != NULL);
135 /* 1: detach from parent container */
136 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
137 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
139 /* 2: kill parent container */
140 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
141 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
142 tree_close(con->parent, false, false);
144 /* 3: re-attach to previous parent */
145 con->parent = con->old_parent;
146 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
147 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
149 con->floating = FLOATING_USER_OFF;
151 con_fix_percent(con->parent, WINDOW_ADD);
152 // TODO: don’t influence focus handling when Con was not focused before.
157 * Toggles floating mode for the given container.
159 * If the automatic flag is set to true, this was an automatic update by a change of the
160 * window class from the application which can be overwritten by the user.
163 void toggle_floating_mode(Con *con, bool automatic) {
164 /* see if the client is already floating */
165 if (con_is_floating(con)) {
166 LOG("already floating, re-setting to tiling\n");
168 floating_disable(con, automatic);
172 floating_enable(con, automatic);
176 * Raises the given container in the list of floating containers
179 void floating_raise_con(Con *con) {
180 DLOG("Raising floating con %p / %s\n", con, con->name);
181 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
182 TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
185 DRAGGING_CB(drag_window_callback) {
186 struct xcb_button_press_event_t *event = extra;
188 /* Reposition the client correctly while moving */
189 con->rect.x = old_rect->x + (new_x - event->root_x);
190 con->rect.y = old_rect->y + (new_y - event->root_y);
191 /* TODO: don’t re-render the whole tree just because we change
192 * coordinates of a floating window */
194 x_push_changes(croot);
198 * Called when the user clicked on the titlebar of a floating window.
199 * Calls the drag_pointer function with the drag_window callback
202 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
203 DLOG("floating_drag_window\n");
205 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
210 * This is an ugly data structure which we need because there is no standard
211 * way of having nested functions (only available as a gcc extension at the
212 * moment, clang doesn’t support it) or blocks (only available as a clang
213 * extension and only on Mac OS X systems at the moment).
216 struct resize_window_callback_params {
219 xcb_button_press_event_t *event;
222 DRAGGING_CB(resize_window_callback) {
223 struct resize_window_callback_params *params = extra;
224 xcb_button_press_event_t *event = params->event;
225 border_t corner = params->corner;
227 int32_t dest_x = con->rect.x;
228 int32_t dest_y = con->rect.y;
230 uint32_t dest_height;
232 double ratio = (double) old_rect->width / old_rect->height;
234 /* First guess: We resize by exactly the amount the mouse moved,
235 * taking into account in which corner the client was grabbed */
236 if (corner & BORDER_LEFT)
237 dest_width = old_rect->width - (new_x - event->root_x);
238 else dest_width = old_rect->width + (new_x - event->root_x);
240 if (corner & BORDER_TOP)
241 dest_height = old_rect->height - (new_y - event->root_y);
242 else dest_height = old_rect->height + (new_y - event->root_y);
244 /* TODO: minimum window size */
246 /* Obey minimum window size */
247 dest_width = max(dest_width, client_min_width(client));
248 dest_height = max(dest_height, client_min_height(client));
251 /* User wants to keep proportions, so we may have to adjust our values */
252 if (params->proportional) {
253 dest_width = max(dest_width, (int) (dest_height * ratio));
254 dest_height = max(dest_height, (int) (dest_width / ratio));
257 /* If not the lower right corner is grabbed, we must also reposition
258 * the client by exactly the amount we resized it */
259 if (corner & BORDER_LEFT)
260 dest_x = old_rect->x + (old_rect->width - dest_width);
262 if (corner & BORDER_TOP)
263 dest_y = old_rect->y + (old_rect->height - dest_height);
265 con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
267 /* TODO: don’t re-render the whole tree just because we change
268 * coordinates of a floating window */
270 x_push_changes(croot);
274 * Called when the user clicked on a floating window while holding the
275 * floating_modifier and the right mouse button.
276 * Calls the drag_pointer function with the resize_window callback
279 void floating_resize_window(Con *con, bool proportional,
280 xcb_button_press_event_t *event) {
281 DLOG("floating_resize_window\n");
283 /* corner saves the nearest corner to the original click. It contains
284 * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
287 if (event->event_x <= (con->rect.width / 2))
288 corner |= BORDER_LEFT;
289 else corner |= BORDER_RIGHT;
291 if (event->event_y <= (con->rect.height / 2))
292 corner |= BORDER_TOP;
293 else corner |= BORDER_RIGHT;
295 struct resize_window_callback_params params = { corner, proportional, event };
297 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, ¶ms);
301 * This function grabs your pointer and lets you drag stuff around (borders).
302 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
303 * and the given callback will be called with the parameters specified (client,
304 * border on which the click originally was), the original rect of the client,
305 * the event and the new coordinates (x, y).
308 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
309 confine_to, border_t border, callback_t callback, void *extra)
311 xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
312 uint32_t new_x, new_y;
315 memcpy(&old_rect, &(con->rect), sizeof(Rect));
317 /* Grab the pointer */
318 /* TODO: returncode */
319 xcb_grab_pointer(conn,
320 false, /* get all pointer events specified by the following mask */
321 root, /* grab the root window */
322 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
323 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
324 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
325 confine_to, /* confine_to = in which window should the cursor stay */
326 XCB_NONE, /* don’t display a special cursor */
329 /* Go into our own event loop */
332 xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
333 /* I’ve always wanted to have my own eventhandler… */
334 while ((inside_event = xcb_wait_for_event(conn))) {
335 /* We now handle all events we can get using xcb_poll_for_event */
337 /* Same as get_event_handler in xcb */
338 int nr = inside_event->response_type;
340 /* An error occured */
341 //handle_event(NULL, conn, inside_event);
346 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
350 case XCB_BUTTON_RELEASE:
353 case XCB_MOTION_NOTIFY:
354 /* motion_notify events are saved for later */
355 FREE(last_motion_notify);
356 last_motion_notify = inside_event;
359 case XCB_UNMAP_NOTIFY:
360 DLOG("Unmap-notify, aborting\n");
361 xcb_event_handle(&evenths, inside_event);
365 DLOG("Passing to original handler\n");
366 /* Use original handler */
367 xcb_event_handle(&evenths, inside_event);
370 if (last_motion_notify != inside_event)
372 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
374 if (last_motion_notify == NULL)
377 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
378 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
380 callback(con, &old_rect, new_x, new_y, extra);
381 FREE(last_motion_notify);
384 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
390 * Changes focus in the given direction for floating clients.
392 * Changing to the left/right means going to the previous/next floating client,
393 * changing to top/bottom means cycling through the Z-index.
396 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
397 DLOG("floating focus\n");
399 if (direction == D_LEFT || direction == D_RIGHT) {
400 /* Go to the next/previous floating client */
403 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
404 TAILQ_NEXT(currently_focused, floating_clients))) !=
405 TAILQ_END(&(currently_focused->workspace->floating_clients))) {
406 if (!client->floating)
408 set_focus(conn, client, true);
415 * Moves the client 10px to the specified direction.
418 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
419 DLOG("floating move\n");
421 Rect destination = currently_focused->rect;
422 Rect *screen = &(currently_focused->workspace->output->rect);
437 /* to make static analyzers happy */
442 /* Prevent windows from vanishing completely */
443 if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
444 (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
445 (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
446 (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
447 DLOG("boundary check failed, not moving\n");
451 currently_focused->rect = destination;
452 reposition_client(conn, currently_focused);
454 /* Because reposition_client does not send a faked configure event (only resize does),
455 * we need to initiate that on our own */
456 fake_absolute_configure_notify(conn, currently_focused);
457 /* fake_absolute_configure_notify flushes */
461 * Hides all floating clients (or show them if they are currently hidden) on
462 * the specified workspace.
465 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
468 workspace->floating_hidden = !workspace->floating_hidden;
469 DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
470 TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
471 if (workspace->floating_hidden)
472 client_unmap(conn, client);
473 else client_map(conn, client);
476 /* If we just unmapped all floating windows we should ensure that the focus
477 * is set correctly, that ist, to the first non-floating client in stack */
478 if (workspace->floating_hidden)
479 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
480 if (client_is_floating(client))
482 set_focus(conn, client, true);