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 /* check floating clients and adjust old_parent if necessary */
136 fix_floating_parent(croot, con);
138 /* Get the container which is next focused */
140 if (con->type == CT_FLOATING_CON) {
141 next = TAILQ_NEXT(con, floating_windows);
142 if (next == TAILQ_END(&(con->parent->floating_head)))
143 next = con_get_workspace(con);
145 next = TAILQ_NEXT(con, focused);
146 if (next == TAILQ_END(&(con->parent->nodes_head))) {
148 while (!TAILQ_EMPTY(&(next->focus_head)) &&
149 TAILQ_FIRST(&(next->focus_head)) != con)
150 next = TAILQ_FIRST(&(next->focus_head));
154 DLOG("closing %p, kill_window = %d\n", con, kill_window);
156 /* We cannot use TAILQ_FOREACH because the children get deleted
157 * in their parent’s nodes_head */
158 while (!TAILQ_EMPTY(&(con->nodes_head))) {
159 child = TAILQ_FIRST(&(con->nodes_head));
160 tree_close(child, kill_window);
163 if (con->window != NULL) {
165 x_window_kill(con->window->id);
167 /* un-parent the window */
168 xcb_reparent_window(conn, con->window->id, root, 0, 0);
169 /* TODO: client_unmap to set state to withdrawn */
175 /* kill the X11 part of this container */
179 con_fix_percent(con->parent, WINDOW_REMOVE);
181 if (con_is_floating(con)) {
182 DLOG("Container was floating, killing floating container\n");
184 TAILQ_REMOVE(&(con->parent->parent->floating_head), con->parent, floating_windows);
185 TAILQ_REMOVE(&(con->parent->parent->focus_head), con->parent, focused);
186 tree_close(con->parent, false);
191 TAILQ_REMOVE(&all_cons, con, all_cons);
194 /* in the case of floating windows, we already focused another container
195 * when closing the parent, so we can exit now. */
199 DLOG("focusing %p / %s\n", next, next->name);
200 /* TODO: check if the container (or one of its children) was focused */
205 * Closes the current container using tree_close().
208 void tree_close_con() {
209 assert(focused != NULL);
210 if (focused->type == CT_WORKSPACE) {
211 LOG("Cannot close workspace\n");
216 tree_close(focused, true);
220 * Splits (horizontally or vertically) the given container by creating a new
221 * container which contains the old one and the future ones.
224 void tree_split(Con *con, orientation_t orientation) {
225 /* for a workspace, we just need to change orientation */
226 if (con->type == CT_WORKSPACE) {
227 DLOG("Workspace, simply changing orientation to %d\n", orientation);
228 con->orientation = orientation;
232 Con *parent = con->parent;
233 /* if we are in a container whose parent contains only one
234 * child and has the same orientation like we are trying to
235 * set, this operation is a no-op to not confuse the user */
236 if (parent->orientation == orientation &&
237 TAILQ_NEXT(con, nodes) == TAILQ_END(&(parent->nodes_head))) {
238 DLOG("Not splitting the same way again\n");
242 DLOG("Splitting in orientation %d\n", orientation);
244 /* 2: replace it with a new Con */
245 Con *new = con_new(NULL);
246 TAILQ_REPLACE(&(parent->nodes_head), con, new, nodes);
247 TAILQ_REPLACE(&(parent->focus_head), con, new, focused);
248 new->parent = parent;
249 new->orientation = orientation;
251 /* 3: add it as a child to the new Con */
252 con_attach(con, new);
256 * Moves focus one level up.
260 /* We can focus up to the workspace, but not any higher in the tree */
261 if (focused->parent->type != CT_CON &&
262 focused->parent->type != CT_WORKSPACE) {
263 printf("cannot go up\n");
266 con_focus(focused->parent);
270 * Moves focus one level down.
274 /* Go down the focus stack of the current node */
275 Con *next = TAILQ_FIRST(&(focused->focus_head));
276 if (next == TAILQ_END(&(focused->focus_head))) {
277 printf("cannot go down\n");
283 static void mark_unmapped(Con *con) {
287 TAILQ_FOREACH(current, &(con->nodes_head), nodes)
288 mark_unmapped(current);
292 * Renders the tree, that is rendering all outputs using render_con() and
293 * pushing the changes to X11 using x_push_changes().
300 printf("-- BEGIN RENDERING --\n");
301 /* Reset map state for all nodes in tree */
302 /* TODO: a nicer method to walk all nodes would be good, maybe? */
303 mark_unmapped(croot);
304 croot->mapped = true;
306 /* We start rendering at an output */
308 TAILQ_FOREACH(output, &(croot->nodes_head), nodes) {
309 printf("output %p / %s\n", output, output->name);
312 x_push_changes(croot);
313 printf("-- END RENDERING --\n");
317 * Changes focus in the given way (next/previous) and given orientation
318 * (horizontal/vertical).
321 void tree_next(char way, orientation_t orientation) {
322 /* 1: get the first parent with the same orientation */
323 Con *parent = focused->parent;
324 while (parent->orientation != orientation) {
325 LOG("need to go one level further up\n");
326 /* if the current parent is an output, we are at a workspace
327 * and the orientation still does not match */
328 if (parent->type == CT_WORKSPACE)
330 parent = parent->parent;
332 Con *current = TAILQ_FIRST(&(parent->focus_head));
333 assert(current != TAILQ_END(&(parent->focus_head)));
335 /* 2: chose next (or previous) */
338 next = TAILQ_NEXT(current, nodes);
339 /* if we are at the end of the list, we need to wrap */
340 if (next == TAILQ_END(&(parent->nodes_head)))
341 next = TAILQ_FIRST(&(parent->nodes_head));
343 next = TAILQ_PREV(current, nodes_head, nodes);
344 /* if we are at the end of the list, we need to wrap */
345 if (next == TAILQ_END(&(parent->nodes_head)))
346 next = TAILQ_LAST(&(parent->nodes_head), nodes_head);
349 /* 3: focus choice comes in here. at the moment we will go down
350 * until we find a window */
351 /* TODO: check for window, atm we only go down as far as possible */
352 while (!TAILQ_EMPTY(&(next->focus_head)))
353 next = TAILQ_FIRST(&(next->focus_head));
359 * Moves the current container in the given way (next/previous) and given
360 * orientation (horizontal/vertical).
363 void tree_move(char way, orientation_t orientation) {
364 /* 1: get the first parent with the same orientation */
365 Con *parent = focused->parent;
366 if (focused->type == CT_WORKSPACE)
368 bool level_changed = false;
369 while (parent->orientation != orientation) {
370 LOG("need to go one level further up\n");
371 /* if the current parent is an output, we are at a workspace
372 * and the orientation still does not match */
373 if (parent->type == CT_WORKSPACE)
375 parent = parent->parent;
376 level_changed = true;
378 Con *current = TAILQ_FIRST(&(parent->focus_head));
379 assert(current != TAILQ_END(&(parent->focus_head)));
381 /* 2: chose next (or previous) */
384 LOG("i would insert it after %p / %s\n", next, next->name);
385 if (!level_changed) {
386 next = TAILQ_NEXT(next, nodes);
387 if (next == TAILQ_END(&(next->parent->nodes_head))) {
388 LOG("cannot move further to the right\n");
392 /* if this is a split container, we need to go down */
393 while (!TAILQ_EMPTY(&(next->focus_head)))
394 next = TAILQ_FIRST(&(next->focus_head));
398 focused->parent = next->parent;
400 TAILQ_INSERT_AFTER(&(next->parent->nodes_head), next, focused, nodes);
401 TAILQ_INSERT_HEAD(&(next->parent->focus_head), focused, focused);
402 /* TODO: don’t influence focus handling? */
404 LOG("i would insert it before %p / %s\n", current, current->name);
405 bool gone_down = false;
406 if (!level_changed) {
407 next = TAILQ_PREV(next, nodes_head, nodes);
408 if (next == TAILQ_END(&(next->parent->nodes_head))) {
409 LOG("cannot move further\n");
413 /* if this is a split container, we need to go down */
414 while (!TAILQ_EMPTY(&(next->focus_head))) {
416 next = TAILQ_FIRST(&(next->focus_head));
421 focused->parent = next->parent;
423 /* After going down in the tree, we insert the container *after*
424 * the currently focused one even though the command used "before".
425 * This is to keep the user experience clear, since the before/after
426 * only signifies the direction of the movement on top-level */
428 TAILQ_INSERT_AFTER(&(next->parent->nodes_head), next, focused, nodes);
429 else TAILQ_INSERT_BEFORE(next, focused, nodes);
430 TAILQ_INSERT_HEAD(&(next->parent->focus_head), focused, focused);
431 /* TODO: don’t influence focus handling? */