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: detach the container from its parent */
26 /* TODO: refactor this with tree_close() */
27 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
28 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
30 con_fix_percent(con->parent, WINDOW_REMOVE);
32 /* 2: create a new container to render the decoration on, add
33 * it as a floating window to the workspace */
34 Con *nc = con_new(NULL);
35 /* we need to set the parent afterwards instead of passing it as an
36 * argument to con_new() because nc would be inserted into the tiling layer
38 nc->parent = con_get_workspace(con);
41 asprintf(&name, "[i3 con] floatingcon around %p", con);
45 /* find the height for the decorations */
46 i3Font *font = load_font(conn, config.font);
47 int deco_height = font->height + 5;
50 /* add pixels for the decoration */
51 /* TODO: don’t add them when the user automatically puts new windows into
52 * 1pixel/borderless mode */
53 nc->rect.height += deco_height + 4;
55 nc->orientation = NO_ORIENTATION;
56 nc->type = CT_FLOATING_CON;
57 TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
58 TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
60 /* 3: attach the child to the new parent container */
61 con->old_parent = con->parent;
63 con->floating = FLOATING_USER_ON;
65 /* Some clients (like GIMP’s color picker window) get mapped
66 * to (0, 0), so we push them to a reasonable position
67 * (centered over their leader) */
68 if (nc->rect.x == 0 && nc->rect.y == 0) {
70 if (con->window && con->window->leader != XCB_NONE &&
71 (leader = con_by_window_id(con->window->leader)) != NULL) {
72 DLOG("Centering above leader\n");
73 nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
74 nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
76 /* center the window on workspace as fallback */
78 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
79 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
83 TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
84 TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
85 // TODO: don’t influence focus handling when Con was not focused before.
89 void floating_disable(Con *con, bool automatic) {
90 if (!con_is_floating(con)) {
91 LOG("Container isn't floating, not doing anything.\n");
95 assert(con->old_parent != NULL);
97 /* 1: detach from parent container */
98 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
99 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
101 /* 2: kill parent container */
102 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
103 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
104 tree_close(con->parent, false, false);
106 /* 3: re-attach to previous parent */
107 con->parent = con->old_parent;
108 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
109 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
111 con->floating = FLOATING_USER_OFF;
113 con_fix_percent(con->parent, WINDOW_ADD);
114 // TODO: don’t influence focus handling when Con was not focused before.
119 * Toggles floating mode for the given container.
121 * If the automatic flag is set to true, this was an automatic update by a change of the
122 * window class from the application which can be overwritten by the user.
125 void toggle_floating_mode(Con *con, bool automatic) {
126 /* see if the client is already floating */
127 if (con_is_floating(con)) {
128 LOG("already floating, re-setting to tiling\n");
130 floating_disable(con, automatic);
134 floating_enable(con, automatic);
137 DRAGGING_CB(drag_window_callback) {
138 struct xcb_button_press_event_t *event = extra;
140 /* Reposition the client correctly while moving */
141 con->rect.x = old_rect->x + (new_x - event->root_x);
142 con->rect.y = old_rect->y + (new_y - event->root_y);
143 /* TODO: don’t re-render the whole tree just because we change
144 * coordinates of a floating window */
146 x_push_changes(croot);
150 * Called when the user clicked on the titlebar of a floating window.
151 * Calls the drag_pointer function with the drag_window callback
154 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
155 DLOG("floating_drag_window\n");
157 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
162 * This is an ugly data structure which we need because there is no standard
163 * way of having nested functions (only available as a gcc extension at the
164 * moment, clang doesn’t support it) or blocks (only available as a clang
165 * extension and only on Mac OS X systems at the moment).
168 struct resize_window_callback_params {
171 xcb_button_press_event_t *event;
174 DRAGGING_CB(resize_window_callback) {
175 struct resize_window_callback_params *params = extra;
176 xcb_button_press_event_t *event = params->event;
177 border_t corner = params->corner;
179 int32_t dest_x = con->rect.x;
180 int32_t dest_y = con->rect.y;
182 uint32_t dest_height;
184 double ratio = (double) old_rect->width / old_rect->height;
186 /* First guess: We resize by exactly the amount the mouse moved,
187 * taking into account in which corner the client was grabbed */
188 if (corner & BORDER_LEFT)
189 dest_width = old_rect->width - (new_x - event->root_x);
190 else dest_width = old_rect->width + (new_x - event->root_x);
192 if (corner & BORDER_TOP)
193 dest_height = old_rect->height - (new_y - event->root_y);
194 else dest_height = old_rect->height + (new_y - event->root_y);
196 /* TODO: minimum window size */
198 /* Obey minimum window size */
199 dest_width = max(dest_width, client_min_width(client));
200 dest_height = max(dest_height, client_min_height(client));
203 /* User wants to keep proportions, so we may have to adjust our values */
204 if (params->proportional) {
205 dest_width = max(dest_width, (int) (dest_height * ratio));
206 dest_height = max(dest_height, (int) (dest_width / ratio));
209 /* If not the lower right corner is grabbed, we must also reposition
210 * the client by exactly the amount we resized it */
211 if (corner & BORDER_LEFT)
212 dest_x = old_rect->x + (old_rect->width - dest_width);
214 if (corner & BORDER_TOP)
215 dest_y = old_rect->y + (old_rect->height - dest_height);
217 con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
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 a floating window while holding the
227 * floating_modifier and the right mouse button.
228 * Calls the drag_pointer function with the resize_window callback
231 void floating_resize_window(Con *con, bool proportional,
232 xcb_button_press_event_t *event) {
233 DLOG("floating_resize_window\n");
235 /* corner saves the nearest corner to the original click. It contains
236 * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
239 if (event->event_x <= (con->rect.width / 2))
240 corner |= BORDER_LEFT;
241 else corner |= BORDER_RIGHT;
243 if (event->event_y <= (con->rect.height / 2))
244 corner |= BORDER_TOP;
245 else corner |= BORDER_RIGHT;
247 struct resize_window_callback_params params = { corner, proportional, event };
249 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, ¶ms);
253 * This function grabs your pointer and lets you drag stuff around (borders).
254 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
255 * and the given callback will be called with the parameters specified (client,
256 * border on which the click originally was), the original rect of the client,
257 * the event and the new coordinates (x, y).
260 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
261 confine_to, border_t border, callback_t callback, void *extra)
263 xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
264 uint32_t new_x, new_y;
267 memcpy(&old_rect, &(con->rect), sizeof(Rect));
269 /* Grab the pointer */
270 /* TODO: returncode */
271 xcb_grab_pointer(conn,
272 false, /* get all pointer events specified by the following mask */
273 root, /* grab the root window */
274 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
275 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
276 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
277 confine_to, /* confine_to = in which window should the cursor stay */
278 XCB_NONE, /* don’t display a special cursor */
281 /* Go into our own event loop */
284 xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
285 /* I’ve always wanted to have my own eventhandler… */
286 while ((inside_event = xcb_wait_for_event(conn))) {
287 /* We now handle all events we can get using xcb_poll_for_event */
289 /* Same as get_event_handler in xcb */
290 int nr = inside_event->response_type;
292 /* An error occured */
293 //handle_event(NULL, conn, inside_event);
298 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
302 case XCB_BUTTON_RELEASE:
305 case XCB_MOTION_NOTIFY:
306 /* motion_notify events are saved for later */
307 FREE(last_motion_notify);
308 last_motion_notify = inside_event;
311 case XCB_UNMAP_NOTIFY:
312 DLOG("Unmap-notify, aborting\n");
313 xcb_event_handle(&evenths, inside_event);
317 DLOG("Passing to original handler\n");
318 /* Use original handler */
319 xcb_event_handle(&evenths, inside_event);
322 if (last_motion_notify != inside_event)
324 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
326 if (last_motion_notify == NULL)
329 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
330 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
332 callback(con, &old_rect, new_x, new_y, extra);
333 FREE(last_motion_notify);
336 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
342 * Changes focus in the given direction for floating clients.
344 * Changing to the left/right means going to the previous/next floating client,
345 * changing to top/bottom means cycling through the Z-index.
348 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
349 DLOG("floating focus\n");
351 if (direction == D_LEFT || direction == D_RIGHT) {
352 /* Go to the next/previous floating client */
355 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
356 TAILQ_NEXT(currently_focused, floating_clients))) !=
357 TAILQ_END(&(currently_focused->workspace->floating_clients))) {
358 if (!client->floating)
360 set_focus(conn, client, true);
367 * Moves the client 10px to the specified direction.
370 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
371 DLOG("floating move\n");
373 Rect destination = currently_focused->rect;
374 Rect *screen = &(currently_focused->workspace->output->rect);
389 /* to make static analyzers happy */
394 /* Prevent windows from vanishing completely */
395 if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
396 (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
397 (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
398 (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
399 DLOG("boundary check failed, not moving\n");
403 currently_focused->rect = destination;
404 reposition_client(conn, currently_focused);
406 /* Because reposition_client does not send a faked configure event (only resize does),
407 * we need to initiate that on our own */
408 fake_absolute_configure_notify(conn, currently_focused);
409 /* fake_absolute_configure_notify flushes */
413 * Hides all floating clients (or show them if they are currently hidden) on
414 * the specified workspace.
417 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
420 workspace->floating_hidden = !workspace->floating_hidden;
421 DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
422 TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
423 if (workspace->floating_hidden)
424 client_unmap(conn, client);
425 else client_map(conn, client);
428 /* If we just unmapped all floating windows we should ensure that the focus
429 * is set correctly, that ist, to the first non-floating client in stack */
430 if (workspace->floating_hidden)
431 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
432 if (client_is_floating(client))
434 set_focus(conn, client, true);