2 * vim:ts=4:sw=4:expandtab
10 struct all_cons_head all_cons = TAILQ_HEAD_INITIALIZER(all_cons);
13 * Loads tree from ~/.i3/_restart.json (used for in-place restarts).
17 char *globbed = glob_path("~/.i3/_restart.json");
19 if (!path_exists(globbed)) {
20 LOG("%s does not exist, not restoring tree\n", globbed);
25 /* TODO: refactor the following */
26 croot = con_new(NULL);
29 tree_append_json(globbed);
30 char *old_restart = glob_path("~/.i3/_restart.json.old");
32 rename(globbed, old_restart);
36 printf("appended tree, using new root\n");
37 croot = TAILQ_FIRST(&(croot->nodes_head));
38 printf("new root = %p\n", croot);
39 Con *out = TAILQ_FIRST(&(croot->nodes_head));
40 printf("out = %p\n", out);
41 Con *ws = TAILQ_FIRST(&(out->nodes_head));
42 printf("ws = %p\n", ws);
49 * Initializes the tree by creating the root node, adding all RandR outputs
50 * to the tree (that means randr_init() has to be called before) and
51 * assigning a workspace to each RandR output.
57 croot = con_new(NULL);
59 croot->type = CT_ROOT;
63 TAILQ_FOREACH(output, &outputs, outputs) {
67 Con *oc = con_new(croot);
68 oc->name = strdup(output->name);
70 oc->rect = output->rect;
72 /* add a workspace to this output */
74 ws->type = CT_WORKSPACE;
75 ws->name = strdup("1");
76 ws->fullscreen_mode = CF_OUTPUT;
77 ws->orientation = HORIZ;
84 * Opens an empty container in the current container
87 Con *tree_open_con(Con *con) {
89 /* every focusable Con has a parent (outputs have parent root) */
90 con = focused->parent;
91 /* If the parent is an output, we are on a workspace. In this case,
92 * the new container needs to be opened as a leaf of the workspace. */
93 if (con->type == CT_OUTPUT)
99 /* 3: re-calculate child->percent for each child */
100 con_fix_percent(con, WINDOW_ADD);
102 /* 4: add a new container leaf to this con */
103 Con *new = con_new(con);
110 * vanishing is the container that is about to be closed (so any floating
111 * client which has old_parent == vanishing needs to be "re-parented").
114 static void fix_floating_parent(Con *con, Con *vanishing) {
117 if (con->old_parent == vanishing) {
118 LOG("Fixing vanishing old_parent (%p) of container %p to be %p\n",
119 vanishing, con, vanishing->parent);
120 con->old_parent = vanishing->parent;
123 TAILQ_FOREACH(child, &(con->floating_head), floating_windows)
124 fix_floating_parent(child, vanishing);
126 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
127 fix_floating_parent(child, vanishing);
131 * Closes the given container including all children
134 void tree_close(Con *con, bool kill_window) {
135 Con *parent = con->parent;
137 /* check floating clients and adjust old_parent if necessary */
138 fix_floating_parent(croot, con);
140 /* Get the container which is next focused */
141 Con *next = con_next_focused(con);
143 DLOG("closing %p, kill_window = %d\n", con, kill_window);
145 /* We cannot use TAILQ_FOREACH because the children get deleted
146 * in their parent’s nodes_head */
147 while (!TAILQ_EMPTY(&(con->nodes_head))) {
148 child = TAILQ_FIRST(&(con->nodes_head));
149 tree_close(child, kill_window);
152 if (con->window != NULL) {
154 x_window_kill(con->window->id);
156 /* un-parent the window */
157 xcb_reparent_window(conn, con->window->id, root, 0, 0);
158 /* TODO: client_unmap to set state to withdrawn */
164 /* kill the X11 part of this container */
168 con_fix_percent(parent, WINDOW_REMOVE);
170 if (con_is_floating(con)) {
171 DLOG("Container was floating, killing floating container\n");
173 TAILQ_REMOVE(&(parent->parent->floating_head), parent, floating_windows);
174 TAILQ_REMOVE(&(parent->parent->focus_head), parent, focused);
175 tree_close(parent, false);
180 TAILQ_REMOVE(&all_cons, con, all_cons);
183 /* in the case of floating windows, we already focused another container
184 * when closing the parent, so we can exit now. */
188 DLOG("focusing %p / %s\n", next, next->name);
189 /* TODO: check if the container (or one of its children) was focused */
192 /* check if the parent container is empty now and close it */
193 if (parent->type != CT_WORKSPACE &&
194 TAILQ_EMPTY(&(parent->nodes_head))) {
195 DLOG("Closing empty parent container\n");
196 /* TODO: check if this container would swallow any other client and
197 * don’t close it automatically. */
198 tree_close(parent, false);
203 * Closes the current container using tree_close().
206 void tree_close_con() {
207 assert(focused != NULL);
208 if (focused->type == CT_WORKSPACE) {
209 LOG("Cannot close workspace\n");
214 tree_close(focused, true);
218 * Splits (horizontally or vertically) the given container by creating a new
219 * container which contains the old one and the future ones.
222 void tree_split(Con *con, orientation_t orientation) {
223 /* for a workspace, we just need to change orientation */
224 if (con->type == CT_WORKSPACE) {
225 DLOG("Workspace, simply changing orientation to %d\n", orientation);
226 con->orientation = orientation;
230 Con *parent = con->parent;
231 /* if we are in a container whose parent contains only one
232 * child and has the same orientation like we are trying to
233 * set, this operation is a no-op to not confuse the user */
234 if (parent->orientation == orientation &&
235 TAILQ_NEXT(con, nodes) == TAILQ_END(&(parent->nodes_head))) {
236 DLOG("Not splitting the same way again\n");
240 DLOG("Splitting in orientation %d\n", orientation);
242 /* 2: replace it with a new Con */
243 Con *new = con_new(NULL);
244 TAILQ_REPLACE(&(parent->nodes_head), con, new, nodes);
245 TAILQ_REPLACE(&(parent->focus_head), con, new, focused);
246 new->parent = parent;
247 new->orientation = orientation;
249 /* 3: add it as a child to the new Con */
250 con_attach(con, new);
254 * Moves focus one level up.
258 /* We can focus up to the workspace, but not any higher in the tree */
259 if (focused->parent->type != CT_CON &&
260 focused->parent->type != CT_WORKSPACE) {
261 printf("cannot go up\n");
264 con_focus(focused->parent);
268 * Moves focus one level down.
272 /* Go down the focus stack of the current node */
273 Con *next = TAILQ_FIRST(&(focused->focus_head));
274 if (next == TAILQ_END(&(focused->focus_head))) {
275 printf("cannot go down\n");
281 static void mark_unmapped(Con *con) {
285 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
286 mark_unmapped(current);
290 * Renders the tree, that is rendering all outputs using render_con() and
291 * pushing the changes to X11 using x_push_changes().
298 printf("-- BEGIN RENDERING --\n");
299 /* Reset map state for all nodes in tree */
300 /* TODO: a nicer method to walk all nodes would be good, maybe? */
301 mark_unmapped(croot);
302 croot->mapped = true;
304 /* We start rendering at an output */
306 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
307 printf("output %p / %s\n", output, output->name);
310 x_push_changes(croot);
311 printf("-- END RENDERING --\n");
315 * Changes focus in the given way (next/previous) and given orientation
316 * (horizontal/vertical).
319 void tree_next(char way, orientation_t orientation) {
320 /* 1: get the first parent with the same orientation */
321 Con *parent = focused->parent;
322 while (focused->type != CT_WORKSPACE &&
323 con_orientation(parent) != orientation) {
324 LOG("need to go one level further up\n");
325 /* if the current parent is an output, we are at a workspace
326 * and the orientation still does not match */
327 if (parent->type == CT_WORKSPACE)
329 parent = parent->parent;
331 Con *current = TAILQ_FIRST(&(parent->focus_head));
332 assert(current != TAILQ_END(&(parent->focus_head)));
334 /* 2: chose next (or previous) */
337 next = TAILQ_NEXT(current, nodes);
338 /* if we are at the end of the list, we need to wrap */
339 if (next == TAILQ_END(&(parent->nodes_head)))
340 next = TAILQ_FIRST(&(parent->nodes_head));
342 next = TAILQ_PREV(current, nodes_head, nodes);
343 /* if we are at the end of the list, we need to wrap */
344 if (next == TAILQ_END(&(parent->nodes_head)))
345 next = TAILQ_LAST(&(parent->nodes_head), nodes_head);
348 /* 3: focus choice comes in here. at the moment we will go down
349 * until we find a window */
350 /* TODO: check for window, atm we only go down as far as possible */
351 while (!TAILQ_EMPTY(&(next->focus_head)))
352 next = TAILQ_FIRST(&(next->focus_head));
358 * Moves the current container in the given way (next/previous) and given
359 * orientation (horizontal/vertical).
362 void tree_move(char way, orientation_t orientation) {
363 /* 1: get the first parent with the same orientation */
364 Con *parent = focused->parent;
365 if (focused->type == CT_WORKSPACE)
367 bool level_changed = false;
368 while (con_orientation(parent) != orientation) {
369 LOG("need to go one level further up\n");
370 /* if the current parent is an output, we are at a workspace
371 * and the orientation still does not match */
372 if (parent->type == CT_WORKSPACE)
374 parent = parent->parent;
375 level_changed = true;
377 Con *current = TAILQ_FIRST(&(parent->focus_head));
378 assert(current != TAILQ_END(&(parent->focus_head)));
380 /* 2: chose next (or previous) */
383 LOG("i would insert it after %p / %s\n", next, next->name);
384 if (!level_changed) {
385 next = TAILQ_NEXT(next, nodes);
386 if (next == TAILQ_END(&(next->parent->nodes_head))) {
387 LOG("cannot move further to the right\n");
391 /* if this is a split container, we need to go down */
392 while (!TAILQ_EMPTY(&(next->focus_head)))
393 next = TAILQ_FIRST(&(next->focus_head));
397 focused->parent = next->parent;
399 TAILQ_INSERT_AFTER(&(next->parent->nodes_head), next, focused, nodes);
400 TAILQ_INSERT_HEAD(&(next->parent->focus_head), focused, focused);
401 /* TODO: don’t influence focus handling? */
403 LOG("i would insert it before %p / %s\n", current, current->name);
404 bool gone_down = false;
405 if (!level_changed) {
406 next = TAILQ_PREV(next, nodes_head, nodes);
407 if (next == TAILQ_END(&(next->parent->nodes_head))) {
408 LOG("cannot move further\n");
412 /* if this is a split container, we need to go down */
413 while (!TAILQ_EMPTY(&(next->focus_head))) {
415 next = TAILQ_FIRST(&(next->focus_head));
420 focused->parent = next->parent;
422 /* After going down in the tree, we insert the container *after*
423 * the currently focused one even though the command used "before".
424 * This is to keep the user experience clear, since the before/after
425 * only signifies the direction of the movement on top-level */
427 TAILQ_INSERT_AFTER(&(next->parent->nodes_head), next, focused, nodes);
428 else TAILQ_INSERT_BEFORE(next, focused, nodes);
429 TAILQ_INSERT_HEAD(&(next->parent->focus_head), focused, focused);
430 /* TODO: don’t influence focus handling? */