2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2010 Michael Stapelberg and contributors (see also: LICENSE)
7 * con.c contains all functions which deal with containers directly (creating
8 * containers, searching containers, getting specific properties from
28 Con *con_new(Con *parent) {
29 Con *new = scalloc(sizeof(Con));
30 TAILQ_INSERT_TAIL(&all_cons, new, all_cons);
32 new->name = strdup("");
34 LOG("opening window %d\n", cnt);
36 /* TODO: remove window coloring after test-phase */
37 LOG("color %s\n", colors[cnt]);
38 new->name = strdup(colors[cnt]);
39 uint32_t cp = get_colorpixel(colors[cnt]);
41 if ((cnt % (sizeof(colors) / sizeof(char*))) == 0)
46 xcb_change_window_attributes(conn, new->frame, XCB_CW_BACK_PIXEL, &cp);
48 TAILQ_INIT(&(new->floating_head));
49 TAILQ_INIT(&(new->nodes_head));
50 TAILQ_INIT(&(new->focus_head));
51 TAILQ_INIT(&(new->swallow_head));
54 con_attach(new, parent);
59 void con_attach(Con *con, Con *parent) {
61 TAILQ_INSERT_TAIL(&(parent->nodes_head), con, nodes);
62 /* We insert to the TAIL because con_focus() will correct this.
63 * This way, we have the option to insert Cons without having
65 TAILQ_INSERT_TAIL(&(parent->focus_head), con, focused);
68 void con_detach(Con *con) {
69 if (con->type == CT_FLOATING_CON) {
70 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
71 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
73 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
74 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
79 * Sets input focus to the given container. Will be updated in X11 in the next
80 * run of x_push_changes().
83 void con_focus(Con *con) {
86 /* 1: set focused-pointer to the new con */
87 /* 2: exchange the position of the container in focus stack of the parent all the way up */
88 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
89 TAILQ_INSERT_HEAD(&(con->parent->focus_head), con, focused);
90 if (con->parent->parent != NULL)
91 con_focus(con->parent);
97 * Returns true when this node is a leaf node (has no children)
100 bool con_is_leaf(Con *con) {
101 return TAILQ_EMPTY(&(con->nodes_head));
105 * Returns true if this node accepts a window (if the node swallows windows,
106 * it might already have swallowed enough and cannot hold any more).
109 bool con_accepts_window(Con *con) {
110 /* 1: workspaces never accept direct windows */
111 if (con->type == CT_WORKSPACE)
114 /* TODO: if this is a swallowing container, we need to check its max_clients */
115 return (con->window == NULL);
119 * Gets the output container (first container with CT_OUTPUT in hierarchy) this
123 Con *con_get_output(Con *con) {
125 while (result != NULL && result->type != CT_OUTPUT)
126 result = result->parent;
127 /* We must be able to get an output because focus can never be set higher
128 * in the tree (root node cannot be focused). */
129 assert(result != NULL);
134 * Gets the workspace container this node is on.
137 Con *con_get_workspace(Con *con) {
139 while (result != NULL && result->type != CT_WORKSPACE)
140 result = result->parent;
141 assert(result != NULL);
146 * helper data structure for the breadth-first-search in
147 * con_get_fullscreen_con()
153 TAILQ_ENTRY(bfs_entry) entries;
157 * Returns the first fullscreen node below this node.
160 Con *con_get_fullscreen_con(Con *con) {
161 Con *current, *child;
163 LOG("looking for fullscreen node\n");
164 /* TODO: is breadth-first-search really appropriate? (check as soon as
165 * fullscreen levels and fullscreen for containers is implemented) */
166 TAILQ_HEAD(bfs_head, bfs_entry) bfs_head = TAILQ_HEAD_INITIALIZER(bfs_head);
167 struct bfs_entry *entry = smalloc(sizeof(struct bfs_entry));
169 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
171 while (!TAILQ_EMPTY(&bfs_head)) {
172 entry = TAILQ_FIRST(&bfs_head);
173 current = entry->con;
174 LOG("checking %p\n", current);
175 if (current != con && current->fullscreen_mode != CF_NONE) {
176 /* empty the queue */
177 while (!TAILQ_EMPTY(&bfs_head)) {
178 entry = TAILQ_FIRST(&bfs_head);
179 TAILQ_REMOVE(&bfs_head, entry, entries);
185 LOG("deleting from queue\n");
186 TAILQ_REMOVE(&bfs_head, entry, entries);
189 TAILQ_FOREACH(child, &(current->nodes_head), nodes) {
190 entry = smalloc(sizeof(struct bfs_entry));
192 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
200 * Returns true if the node is floating.
203 bool con_is_floating(Con *con) {
205 LOG("checking if con %p is floating\n", con);
206 return (con->floating >= FLOATING_AUTO_ON);
209 Con *con_by_window_id(xcb_window_t window) {
211 TAILQ_FOREACH(con, &all_cons, all_cons)
212 if (con->window != NULL && con->window->id == window)
217 Con *con_by_frame_id(xcb_window_t frame) {
219 TAILQ_FOREACH(con, &all_cons, all_cons)
220 if (con->frame == frame)
226 * Returns the first container which wants to swallow this window
230 Con *con_for_window(i3Window *window, Match **store_match) {
233 LOG("searching con for window %p\n", window);
234 LOG("class == %s\n", window->class_class);
236 TAILQ_FOREACH(con, &all_cons, all_cons)
237 TAILQ_FOREACH(match, &(con->swallow_head), matches) {
238 if (!match_matches_window(match, window))
240 if (store_match != NULL)
241 *store_match = match;
249 * Updates the percent attribute of the children of the given container. This
250 * function needs to be called when a window is added or removed from a
254 void con_fix_percent(Con *con, int action) {
257 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
259 /* TODO: better document why this math works */
261 if (action == WINDOW_ADD)
262 fix = (1.0 - (1.0 / (children+1)));
264 fix = 1.0 / (1.0 - (1.0 / (children+1)));
266 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
267 if (child->percent <= 0.0)
269 child->percent *= fix;
273 void con_toggle_fullscreen(Con *con) {
274 Con *workspace, *fullscreen;
275 LOG("toggling fullscreen for %p / %s\n", con, con->name);
276 if (con->fullscreen_mode == CF_NONE) {
277 /* 1: check if there already is a fullscreen con */
278 workspace = con_get_workspace(con);
279 if ((fullscreen = con_get_fullscreen_con(workspace)) != NULL) {
280 LOG("Not entering fullscreen mode, container (%p/%s) "
281 "already is in fullscreen mode\n",
282 fullscreen, fullscreen->name);
286 /* 2: enable fullscreen */
287 con->fullscreen_mode = CF_OUTPUT;
289 /* 1: disable fullscreen */
290 con->fullscreen_mode = CF_NONE;
292 LOG("mode now: %d\n", con->fullscreen_mode);
294 /* update _NET_WM_STATE if this container has a window */
295 /* TODO: when a window is assigned to a container which is already
296 * fullscreened, this state needs to be pushed to the client, too */
297 if (con->window == NULL)
301 unsigned int num = 0;
303 if (con->fullscreen_mode != CF_NONE)
304 values[num++] = atoms[_NET_WM_STATE_FULLSCREEN];
306 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
307 atoms[_NET_WM_STATE], ATOM, 32, num, values);