4 * i3 - an improved dynamic tiling window manager
6 * © 2009 Michael Stapelberg and contributors
8 * See file LICENSE for license information.
10 * src/floating.c: contains all functions for handling floating clients
18 #include <xcb/xcb_event.h>
28 /* On which border was the dragging initiated? */
29 typedef enum { BORDER_LEFT, BORDER_RIGHT, BORDER_TOP, BORDER_BOTTOM} border_t;
30 /* Callback for dragging */
31 typedef void(*callback_t)(xcb_connection_t*, Client*, border_t, Rect*, xcb_button_press_event_t*, uint32_t, uint32_t);
33 /* Forward definitions */
34 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
35 border_t border, callback_t callback);
38 * Toggles floating mode for the given client.
39 * Correctly takes care of the position/size (separately stored for tiling/floating mode)
40 * and repositions/resizes/redecorates the client.
42 * If the automatic flag is set to true, this was an automatic update by a change of the
43 * window class from the application which can be overwritten by the user.
46 void toggle_floating_mode(xcb_connection_t *conn, Client *client, bool automatic) {
47 Container *con = client->container;
50 LOG("This client is already in floating (container == NULL), re-inserting\n");
52 SLIST_FOREACH(next_tiling, &(client->workspace->focus_stack), focus_clients)
53 if (next_tiling->floating <= FLOATING_USER_OFF)
55 /* If there are no tiling clients on this workspace, there can only be one
56 * container: the first one */
57 if (next_tiling == SLIST_END(&(client->workspace->focus_stack)))
58 con = client->workspace->table[0][0];
59 else con = next_tiling->container;
61 LOG("destination container = %p\n", con);
62 Client *old_focused = con->currently_focused;
63 /* Preserve position/size */
64 memcpy(&(client->floating_rect), &(client->rect), sizeof(Rect));
66 client->floating = FLOATING_USER_OFF;
67 client->container = con;
69 if (old_focused != NULL && !old_focused->dock)
70 CIRCLEQ_INSERT_AFTER(&(con->clients), old_focused, client, clients);
71 else CIRCLEQ_INSERT_TAIL(&(con->clients), client, clients);
73 LOG("Re-inserted the client into the matrix.\n");
74 con->currently_focused = client;
76 render_container(conn, con);
82 LOG("Entering floating for client %08x\n", client->child);
84 /* Remove the client of its container */
85 client_remove_from_container(conn, client, con, false);
86 client->container = NULL;
88 if (con->currently_focused == client) {
89 LOG("Need to re-adjust currently_focused\n");
90 /* Get the next client in the focus stack for this particular container */
91 con->currently_focused = get_last_focused_client(conn, con, NULL);
95 client->floating = FLOATING_AUTO_ON;
96 else client->floating = FLOATING_USER_ON;
98 /* Initialize the floating position from the position in tiling mode, if this
99 * client never was floating (x == -1) */
100 if (client->floating_rect.x == -1) {
101 /* Copy over the position */
102 client->floating_rect.x = client->rect.x;
103 client->floating_rect.y = client->rect.y;
105 /* Copy the size the other direction */
106 client->rect.width = client->floating_rect.width;
107 client->rect.height = client->floating_rect.height;
109 LOG("copying size from tiling (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
110 client->floating_rect.width, client->floating_rect.height);
112 /* If the client was already in floating before we restore the old position / size */
113 LOG("using: (%d, %d) size (%d, %d)\n", client->floating_rect.x, client->floating_rect.y,
114 client->floating_rect.width, client->floating_rect.height);
115 memcpy(&(client->rect), &(client->floating_rect), sizeof(Rect));
118 /* Raise the client */
119 xcb_raise_window(conn, client->frame);
120 reposition_client(conn, client);
121 resize_client(conn, client);
122 /* redecorate_window flushes */
123 redecorate_window(conn, client);
125 /* Re-render the tiling layout of this container */
126 render_container(conn, con);
131 * Callback for resizing windows
134 static void resize_callback(xcb_connection_t *conn, Client *client, border_t border, Rect *old_rect,
135 xcb_button_press_event_t *event, uint32_t new_x, uint32_t new_y) {
138 client->rect.width = old_rect->width + (new_x - event->root_x);
142 client->rect.height = old_rect->height + (new_y - event->root_y);
146 client->rect.y = old_rect->y + (new_y - event->root_y);
147 client->rect.height = old_rect->height + (event->root_y - new_y);
151 client->rect.x = old_rect->x + (new_x - event->root_x);
152 client->rect.width = old_rect->width + (event->root_x - new_x);
156 /* Push the new position/size to X11 */
157 reposition_client(conn, client);
158 resize_client(conn, client);
163 * Called whenever the user clicks on a border (not the titlebar!) of a floating window.
164 * Determines on which border the user clicked and launches the drag_pointer function
165 * with the resize_callback.
168 int floating_border_click(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
170 LOG("floating border click\n");
173 if (event->event_y < 2)
175 else if (event->event_y >= (client->rect.height - 2))
176 border = BORDER_BOTTOM;
177 else if (event->event_x <= 2)
178 border = BORDER_LEFT;
179 else if (event->event_x > 2)
180 border = BORDER_RIGHT;
182 LOG("Not on any border, not doing anything.\n");
186 LOG("border = %d\n", border);
188 drag_pointer(conn, client, event, border, resize_callback);
193 static void drag_window_callback(xcb_connection_t *conn, Client *client, border_t border, Rect *old_rect,
194 xcb_button_press_event_t *event, uint32_t new_x, uint32_t new_y) {
195 /* Reposition the client correctly while moving */
196 client->rect.x = old_rect->x + (new_x - event->root_x);
197 client->rect.y = old_rect->y + (new_y - event->root_y);
198 reposition_client(conn, client);
199 /* Because reposition_client does not send a faked configure event (only resize does),
200 * we need to initiate that on our own */
201 fake_absolute_configure_notify(conn, client);
202 /* fake_absolute_configure_notify flushes */
206 * Called when the user clicked on the titlebar of a floating window.
207 * Calls the drag_pointer function with the drag_window callback
210 void floating_drag_window(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event) {
211 LOG("floating_drag_window\n");
213 drag_pointer(conn, client, event, BORDER_TOP /* irrelevant */, drag_window_callback);
217 * This function grabs your pointer and lets you drag stuff around (borders).
218 * Every time you move your mouse, an XCB_MOTION_NOTIFY event will be received
219 * and the given callback will be called with the parameters specified (client,
220 * border on which the click originally was), the original rect of the client,
221 * the event and the new coordinates (x, y).
224 static void drag_pointer(xcb_connection_t *conn, Client *client, xcb_button_press_event_t *event,
225 border_t border, callback_t callback) {
226 xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
227 uint32_t new_x, new_y;
229 memcpy(&old_rect, &(client->rect), sizeof(Rect));
231 /* Grab the pointer */
232 /* TODO: returncode */
233 xcb_grab_pointer(conn,
234 false, /* get all pointer events specified by the following mask */
235 root, /* grab the root window */
236 XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION, /* which events to let through */
237 XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
238 XCB_GRAB_MODE_ASYNC, /* keyboard mode */
239 XCB_NONE, /* confine_to = in which window should the cursor stay */
240 XCB_NONE, /* don’t display a special cursor */
243 /* Go into our own event loop */
246 xcb_generic_event_t *inside_event;
247 /* I’ve always wanted to have my own eventhandler… */
248 while ((inside_event = xcb_wait_for_event(conn))) {
249 /* Same as get_event_handler in xcb */
250 int nr = inside_event->response_type;
252 /* An error occured */
253 handle_event(NULL, conn, inside_event);
258 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
261 /* Check if we need to escape this loop */
262 if (nr == XCB_BUTTON_RELEASE)
266 case XCB_MOTION_NOTIFY:
267 new_x = ((xcb_motion_notify_event_t*)inside_event)->root_x;
268 new_y = ((xcb_motion_notify_event_t*)inside_event)->root_y;
270 callback(conn, client, border, &old_rect, event, new_x, new_y);
274 LOG("Passing to original handler\n");
275 /* Use original handler */
276 xcb_event_handle(&evenths, inside_event);
282 xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);