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->geometry;
102 /* Raise the width/height to at least 75x50 (minimum size for windows) */
103 nc->rect.width = max(nc->rect.width, 75);
104 nc->rect.height = max(nc->rect.height, 50);
105 /* add pixels for the decoration */
106 /* TODO: don’t add them when the user automatically puts new windows into
107 * 1pixel/borderless mode */
108 nc->rect.height += deco_height + 4;
110 DLOG("Floating rect: (%d, %d) with %d x %d\n", nc->rect.x, nc->rect.y, nc->rect.width, nc->rect.height);
111 nc->orientation = NO_ORIENTATION;
112 nc->type = CT_FLOATING_CON;
113 TAILQ_INSERT_TAIL(&(nc->parent->floating_head), nc, floating_windows);
114 TAILQ_INSERT_TAIL(&(nc->parent->focus_head), nc, focused);
116 /* 3: attach the child to the new parent container */
119 con->floating = FLOATING_USER_ON;
121 /* Some clients (like GIMP’s color picker window) get mapped
122 * to (0, 0), so we push them to a reasonable position
123 * (centered over their leader) */
124 if (nc->rect.x == 0 && nc->rect.y == 0) {
126 if (con->window && con->window->leader != XCB_NONE &&
127 (leader = con_by_window_id(con->window->leader)) != NULL) {
128 DLOG("Centering above leader\n");
129 nc->rect.x = leader->rect.x + (leader->rect.width / 2) - (nc->rect.width / 2);
130 nc->rect.y = leader->rect.y + (leader->rect.height / 2) - (nc->rect.height / 2);
132 /* center the window on workspace as fallback */
133 Con *ws = nc->parent;
134 nc->rect.x = ws->rect.x + (ws->rect.width / 2) - (nc->rect.width / 2);
135 nc->rect.y = ws->rect.y + (ws->rect.height / 2) - (nc->rect.height / 2);
139 /* render the cons to get initial window_rect correct */
140 render_con(nc, false);
141 render_con(con, false);
143 TAILQ_INSERT_TAIL(&(nc->nodes_head), con, nodes);
144 TAILQ_INSERT_TAIL(&(nc->focus_head), con, focused);
145 // TODO: don’t influence focus handling when Con was not focused before.
150 void floating_disable(Con *con, bool automatic) {
151 if (!con_is_floating(con)) {
152 LOG("Container isn't floating, not doing anything.\n");
156 /* 1: detach from parent container */
157 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
158 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
160 /* 2: kill parent container */
161 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
162 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
163 tree_close(con->parent, false, false);
165 /* 3: re-attach to the parent of the currently focused con on the workspace
166 * this floating con was on */
167 Con *focused = con_descend_focused(con_get_workspace(con));
168 /* if there is no other container on this workspace, focused will be the
169 * workspace itself */
170 if (focused->type == CT_WORKSPACE)
171 con->parent = focused;
172 else con->parent = focused->parent;
174 /* con_fix_percent will adjust the percent value */
177 TAILQ_INSERT_TAIL(&(con->parent->nodes_head), con, nodes);
178 TAILQ_INSERT_TAIL(&(con->parent->focus_head), con, focused);
180 con->floating = FLOATING_USER_OFF;
182 con_fix_percent(con->parent);
183 // TODO: don’t influence focus handling when Con was not focused before.
188 * Toggles floating mode for the given container.
190 * If the automatic flag is set to true, this was an automatic update by a change of the
191 * window class from the application which can be overwritten by the user.
194 void toggle_floating_mode(Con *con, bool automatic) {
195 /* see if the client is already floating */
196 if (con_is_floating(con)) {
197 LOG("already floating, re-setting to tiling\n");
199 floating_disable(con, automatic);
203 floating_enable(con, automatic);
207 * Raises the given container in the list of floating containers
210 void floating_raise_con(Con *con) {
211 DLOG("Raising floating con %p / %s\n", con, con->name);
212 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
213 TAILQ_INSERT_TAIL(&(con->parent->floating_head), con, floating_windows);
216 DRAGGING_CB(drag_window_callback) {
217 struct xcb_button_press_event_t *event = extra;
219 /* Reposition the client correctly while moving */
220 con->rect.x = old_rect->x + (new_x - event->root_x);
221 con->rect.y = old_rect->y + (new_y - event->root_y);
222 /* TODO: don’t re-render the whole tree just because we change
223 * coordinates of a floating window */
225 x_push_changes(croot);
229 * Called when the user clicked on the titlebar of a floating window.
230 * Calls the drag_pointer function with the drag_window callback
233 void floating_drag_window(Con *con, xcb_button_press_event_t *event) {
234 DLOG("floating_drag_window\n");
236 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, drag_window_callback, event);
241 * This is an ugly data structure which we need because there is no standard
242 * way of having nested functions (only available as a gcc extension at the
243 * moment, clang doesn’t support it) or blocks (only available as a clang
244 * extension and only on Mac OS X systems at the moment).
247 struct resize_window_callback_params {
250 xcb_button_press_event_t *event;
253 DRAGGING_CB(resize_window_callback) {
254 struct resize_window_callback_params *params = extra;
255 xcb_button_press_event_t *event = params->event;
256 border_t corner = params->corner;
258 int32_t dest_x = con->rect.x;
259 int32_t dest_y = con->rect.y;
261 uint32_t dest_height;
263 double ratio = (double) old_rect->width / old_rect->height;
265 /* First guess: We resize by exactly the amount the mouse moved,
266 * taking into account in which corner the client was grabbed */
267 if (corner & BORDER_LEFT)
268 dest_width = old_rect->width - (new_x - event->root_x);
269 else dest_width = old_rect->width + (new_x - event->root_x);
271 if (corner & BORDER_TOP)
272 dest_height = old_rect->height - (new_y - event->root_y);
273 else dest_height = old_rect->height + (new_y - event->root_y);
275 /* TODO: minimum window size */
277 /* Obey minimum window size */
278 dest_width = max(dest_width, client_min_width(client));
279 dest_height = max(dest_height, client_min_height(client));
282 /* User wants to keep proportions, so we may have to adjust our values */
283 if (params->proportional) {
284 dest_width = max(dest_width, (int) (dest_height * ratio));
285 dest_height = max(dest_height, (int) (dest_width / ratio));
288 /* If not the lower right corner is grabbed, we must also reposition
289 * the client by exactly the amount we resized it */
290 if (corner & BORDER_LEFT)
291 dest_x = old_rect->x + (old_rect->width - dest_width);
293 if (corner & BORDER_TOP)
294 dest_y = old_rect->y + (old_rect->height - dest_height);
296 con->rect = (Rect) { dest_x, dest_y, dest_width, dest_height };
298 /* TODO: don’t re-render the whole tree just because we change
299 * coordinates of a floating window */
301 x_push_changes(croot);
305 * Called when the user clicked on a floating window while holding the
306 * floating_modifier and the right mouse button.
307 * Calls the drag_pointer function with the resize_window callback
310 void floating_resize_window(Con *con, bool proportional,
311 xcb_button_press_event_t *event) {
312 DLOG("floating_resize_window\n");
314 /* corner saves the nearest corner to the original click. It contains
315 * a bitmask of the nearest borders (BORDER_LEFT, BORDER_RIGHT, …) */
318 if (event->event_x <= (con->rect.width / 2))
319 corner |= BORDER_LEFT;
320 else corner |= BORDER_RIGHT;
322 if (event->event_y <= (con->rect.height / 2))
323 corner |= BORDER_TOP;
324 else corner |= BORDER_RIGHT;
326 struct resize_window_callback_params params = { corner, proportional, event };
328 drag_pointer(con, event, XCB_NONE, BORDER_TOP /* irrelevant */, resize_window_callback, ¶ms);
332 * This function grabs your pointer and lets you drag stuff around (borders).
333 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
334 * and the given callback will be called with the parameters specified (client,
335 * border on which the click originally was), the original rect of the client,
336 * the event and the new coordinates (x, y).
339 void drag_pointer(Con *con, xcb_button_press_event_t *event, xcb_window_t
340 confine_to, border_t border, callback_t callback, void *extra)
342 uint32_t new_x, new_y;
345 memcpy(&old_rect, &(con->rect), sizeof(Rect));
347 /* Grab the pointer */
348 /* TODO: returncode */
349 xcb_grab_pointer(conn,
350 false, /* get all pointer events specified by the following mask */
351 root, /* grab the root window */
352 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
353 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
354 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
355 confine_to, /* confine_to = in which window should the cursor stay */
356 XCB_NONE, /* don’t display a special cursor */
359 /* Go into our own event loop */
362 xcb_generic_event_t *inside_event, *last_motion_notify = NULL;
363 /* I’ve always wanted to have my own eventhandler… */
364 while ((inside_event = xcb_wait_for_event(conn))) {
365 /* We now handle all events we can get using xcb_poll_for_event */
367 /* Same as get_event_handler in xcb */
368 int nr = inside_event->response_type;
370 /* An error occured */
371 //handle_event(NULL, conn, inside_event);
376 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
380 case XCB_BUTTON_RELEASE:
383 case XCB_MOTION_NOTIFY:
384 /* motion_notify events are saved for later */
385 FREE(last_motion_notify);
386 last_motion_notify = inside_event;
389 case XCB_UNMAP_NOTIFY:
390 DLOG("Unmap-notify, aborting\n");
391 xcb_event_handle(&evenths, inside_event);
395 DLOG("Passing to original handler\n");
396 /* Use original handler */
397 xcb_event_handle(&evenths, inside_event);
400 if (last_motion_notify != inside_event)
402 } while ((inside_event = xcb_poll_for_event(conn)) != NULL);
404 if (last_motion_notify == NULL)
407 new_x = ((xcb_motion_notify_event_t*)last_motion_notify)->root_x;
408 new_y = ((xcb_motion_notify_event_t*)last_motion_notify)->root_y;
410 callback(con, &old_rect, new_x, new_y, extra);
411 FREE(last_motion_notify);
414 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
420 * Changes focus in the given direction for floating clients.
422 * Changing to the left/right means going to the previous/next floating client,
423 * changing to top/bottom means cycling through the Z-index.
426 void floating_focus_direction(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
427 DLOG("floating focus\n");
429 if (direction == D_LEFT || direction == D_RIGHT) {
430 /* Go to the next/previous floating client */
433 while ((client = (direction == D_LEFT ? TAILQ_PREV(currently_focused, floating_clients_head, floating_clients) :
434 TAILQ_NEXT(currently_focused, floating_clients))) !=
435 TAILQ_END(&(currently_focused->workspace->floating_clients))) {
436 if (!client->floating)
438 set_focus(conn, client, true);
445 * Moves the client 10px to the specified direction.
448 void floating_move(xcb_connection_t *conn, Client *currently_focused, direction_t direction) {
449 DLOG("floating move\n");
451 Rect destination = currently_focused->rect;
452 Rect *screen = &(currently_focused->workspace->output->rect);
467 /* to make static analyzers happy */
472 /* Prevent windows from vanishing completely */
473 if ((int32_t)(destination.x + destination.width - 5) <= (int32_t)screen->x ||
474 (int32_t)(destination.x + 5) >= (int32_t)(screen->x + screen->width) ||
475 (int32_t)(destination.y + destination.height - 5) <= (int32_t)screen->y ||
476 (int32_t)(destination.y + 5) >= (int32_t)(screen->y + screen->height)) {
477 DLOG("boundary check failed, not moving\n");
481 currently_focused->rect = destination;
482 reposition_client(conn, currently_focused);
484 /* Because reposition_client does not send a faked configure event (only resize does),
485 * we need to initiate that on our own */
486 fake_absolute_configure_notify(conn, currently_focused);
487 /* fake_absolute_configure_notify flushes */
491 * Hides all floating clients (or show them if they are currently hidden) on
492 * the specified workspace.
495 void floating_toggle_hide(xcb_connection_t *conn, Workspace *workspace) {
498 workspace->floating_hidden = !workspace->floating_hidden;
499 DLOG("floating_hidden is now: %d\n", workspace->floating_hidden);
500 TAILQ_FOREACH(client, &(workspace->floating_clients), floating_clients) {
501 if (workspace->floating_hidden)
502 client_unmap(conn, client);
503 else client_map(conn, client);
506 /* If we just unmapped all floating windows we should ensure that the focus
507 * is set correctly, that ist, to the first non-floating client in stack */
508 if (workspace->floating_hidden)
509 SLIST_FOREACH(client, &(workspace->focus_stack), focus_clients) {
510 if (client_is_floating(client))
512 set_focus(conn, client, true);