738 lines
25 KiB
C
738 lines
25 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* tree.c: Everything that primarily modifies the layout tree data structure.
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*
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*/
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#include "all.h"
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struct Con *croot;
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struct Con *focused;
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struct all_cons_head all_cons = TAILQ_HEAD_INITIALIZER(all_cons);
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/*
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* Create the pseudo-output __i3. Output-independent workspaces such as
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* __i3_scratch will live there.
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*
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*/
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static Con *_create___i3(void) {
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Con *__i3 = con_new(croot, NULL);
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FREE(__i3->name);
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__i3->name = sstrdup("__i3");
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__i3->type = CT_OUTPUT;
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__i3->layout = L_OUTPUT;
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con_fix_percent(croot);
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x_set_name(__i3, "[i3 con] pseudo-output __i3");
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/* For retaining the correct position/size of a scratchpad window, the
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* dimensions of the real outputs should be multiples of the __i3
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* pseudo-output. Ensuring that is the job of scratchpad_fix_resolution()
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* which gets called after this function and after detecting all the
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* outputs (or whenever an output changes). */
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__i3->rect.width = 1280;
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__i3->rect.height = 1024;
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/* Add a content container. */
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DLOG("adding main content container\n");
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Con *content = con_new(NULL, NULL);
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content->type = CT_CON;
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FREE(content->name);
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content->name = sstrdup("content");
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content->layout = L_SPLITH;
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x_set_name(content, "[i3 con] content __i3");
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con_attach(content, __i3, false);
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/* Attach the __i3_scratch workspace. */
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Con *ws = con_new(NULL, NULL);
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ws->type = CT_WORKSPACE;
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ws->num = -1;
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ws->name = sstrdup("__i3_scratch");
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ws->layout = L_SPLITH;
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con_attach(ws, content, false);
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x_set_name(ws, "[i3 con] workspace __i3_scratch");
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ws->fullscreen_mode = CF_OUTPUT;
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return __i3;
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}
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/*
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* Loads tree from 'path' (used for in-place restarts).
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*
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*/
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bool tree_restore(const char *path, xcb_get_geometry_reply_t *geometry) {
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bool result = false;
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char *globbed = resolve_tilde(path);
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char *buf = NULL;
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if (!path_exists(globbed)) {
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LOG("%s does not exist, not restoring tree\n", globbed);
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goto out;
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}
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ssize_t len;
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if ((len = slurp(globbed, &buf)) < 0) {
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/* slurp already logged an error. */
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goto out;
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}
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/* TODO: refactor the following */
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croot = con_new(NULL, NULL);
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croot->rect = (Rect){
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geometry->x,
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geometry->y,
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geometry->width,
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geometry->height};
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focused = croot;
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tree_append_json(focused, buf, len, NULL);
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DLOG("appended tree, using new root\n");
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croot = TAILQ_FIRST(&(croot->nodes_head));
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if (!croot) {
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/* tree_append_json failed. Continuing here would segfault. */
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goto out;
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}
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DLOG("new root = %p\n", croot);
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Con *out = TAILQ_FIRST(&(croot->nodes_head));
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DLOG("out = %p\n", out);
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Con *ws = TAILQ_FIRST(&(out->nodes_head));
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DLOG("ws = %p\n", ws);
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/* For in-place restarting into v4.2, we need to make sure the new
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* pseudo-output __i3 is present. */
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if (strcmp(out->name, "__i3") != 0) {
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DLOG("Adding pseudo-output __i3 during inplace restart\n");
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Con *__i3 = _create___i3();
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/* Ensure that it is the first output, other places in the code make
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* that assumption. */
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TAILQ_REMOVE(&(croot->nodes_head), __i3, nodes);
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TAILQ_INSERT_HEAD(&(croot->nodes_head), __i3, nodes);
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}
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restore_open_placeholder_windows(croot);
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result = true;
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out:
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free(globbed);
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free(buf);
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return result;
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}
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/*
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* Initializes the tree by creating the root node. The CT_OUTPUT Cons below the
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* root node are created in randr.c for each Output.
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*
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*/
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void tree_init(xcb_get_geometry_reply_t *geometry) {
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croot = con_new(NULL, NULL);
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FREE(croot->name);
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croot->name = "root";
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croot->type = CT_ROOT;
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croot->layout = L_SPLITH;
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croot->rect = (Rect){
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geometry->x,
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geometry->y,
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geometry->width,
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geometry->height};
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_create___i3();
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}
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/*
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* Opens an empty container in the current container
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*
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*/
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Con *tree_open_con(Con *con, i3Window *window) {
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if (con == NULL) {
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/* every focusable Con has a parent (outputs have parent root) */
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con = focused->parent;
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/* If the parent is an output, we are on a workspace. In this case,
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* the new container needs to be opened as a leaf of the workspace. */
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if (con->parent->type == CT_OUTPUT && con->type != CT_DOCKAREA) {
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con = focused;
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}
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/* If the currently focused container is a floating container, we
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* attach the new container to the currently focused spot in its
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* workspace. */
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if (con->type == CT_FLOATING_CON) {
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con = con_descend_tiling_focused(con->parent);
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if (con->type != CT_WORKSPACE)
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con = con->parent;
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}
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DLOG("con = %p\n", con);
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}
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assert(con != NULL);
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/* 3. create the container and attach it to its parent */
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Con *new = con_new(con, window);
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new->layout = L_SPLITH;
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/* 4: re-calculate child->percent for each child */
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con_fix_percent(con);
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return new;
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}
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/*
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* Closes the given container including all children.
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* Returns true if the container was killed or false if just WM_DELETE was sent
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* and the window is expected to kill itself.
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*
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* The dont_kill_parent flag is specified when the function calls itself
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* recursively while deleting a containers children.
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*
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*/
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bool tree_close_internal(Con *con, kill_window_t kill_window, bool dont_kill_parent) {
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Con *parent = con->parent;
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/* remove the urgency hint of the workspace (if set) */
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if (con->urgent) {
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con_set_urgency(con, false);
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con_update_parents_urgency(con);
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workspace_update_urgent_flag(con_get_workspace(con));
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}
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DLOG("closing %p, kill_window = %d\n", con, kill_window);
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Con *child, *nextchild;
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bool abort_kill = false;
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/* We cannot use TAILQ_FOREACH because the children get deleted
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* in their parent’s nodes_head */
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for (child = TAILQ_FIRST(&(con->nodes_head)); child;) {
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nextchild = TAILQ_NEXT(child, nodes);
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DLOG("killing child=%p\n", child);
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if (!tree_close_internal(child, kill_window, true)) {
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abort_kill = true;
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}
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child = nextchild;
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}
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if (abort_kill) {
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DLOG("One of the children could not be killed immediately (WM_DELETE sent), aborting.\n");
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return false;
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}
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if (con->window != NULL) {
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if (kill_window != DONT_KILL_WINDOW) {
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x_window_kill(con->window->id, kill_window);
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return false;
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} else {
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xcb_void_cookie_t cookie;
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/* Ignore any further events by clearing the event mask,
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* unmap the window,
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* then reparent it to the root window. */
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xcb_change_window_attributes(conn, con->window->id,
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XCB_CW_EVENT_MASK, (uint32_t[]){XCB_NONE});
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xcb_unmap_window(conn, con->window->id);
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cookie = xcb_reparent_window(conn, con->window->id, root, con->rect.x, con->rect.y);
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/* Ignore X11 errors for the ReparentWindow request.
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* X11 Errors are returned when the window was already destroyed */
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add_ignore_event(cookie.sequence, 0);
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/* We are no longer handling this window, thus set WM_STATE to
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* WM_STATE_WITHDRAWN (see ICCCM 4.1.3.1) */
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long data[] = {XCB_ICCCM_WM_STATE_WITHDRAWN, XCB_NONE};
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cookie = xcb_change_property(conn, XCB_PROP_MODE_REPLACE,
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con->window->id, A_WM_STATE, A_WM_STATE, 32, 2, data);
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/* Remove the window from the save set. All windows in the save set
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* will be mapped when i3 closes its connection (e.g. when
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* restarting). This is not what we want, since some apps keep
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* unmapped windows around and don’t expect them to suddenly be
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* mapped. See https://bugs.i3wm.org/1617 */
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xcb_change_save_set(conn, XCB_SET_MODE_DELETE, con->window->id);
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/* Stop receiving ShapeNotify events. */
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if (shape_supported) {
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xcb_shape_select_input(conn, con->window->id, false);
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}
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/* Ignore X11 errors for the ReparentWindow request.
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* X11 Errors are returned when the window was already destroyed */
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add_ignore_event(cookie.sequence, 0);
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}
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ipc_send_window_event("close", con);
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window_free(con->window);
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con->window = NULL;
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}
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Con *ws = con_get_workspace(con);
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/* Figure out which container to focus next before detaching 'con'. */
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Con *next = (con == focused) ? con_next_focused(con) : NULL;
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DLOG("next = %p, focused = %p\n", next, focused);
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/* Detach the container so that it will not be rendered anymore. */
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con_detach(con);
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/* disable urgency timer, if needed */
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if (con->urgency_timer != NULL) {
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DLOG("Removing urgency timer of con %p\n", con);
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workspace_update_urgent_flag(ws);
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ev_timer_stop(main_loop, con->urgency_timer);
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FREE(con->urgency_timer);
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}
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if (con->type != CT_FLOATING_CON) {
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/* If the container is *not* floating, we might need to re-distribute
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* percentage values for the resized containers. */
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con_fix_percent(parent);
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}
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/* Render the tree so that the surrounding containers take up the space
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* which 'con' does no longer occupy. If we don’t render here, there will
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* be a gap in our containers and that could trigger an EnterNotify for an
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* underlying container, see ticket #660.
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*
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* Rendering has to be avoided when dont_kill_parent is set (when
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* tree_close_internal calls itself recursively) because the tree is in a
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* non-renderable state during that time. */
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if (!dont_kill_parent)
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tree_render();
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/* kill the X11 part of this container */
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x_con_kill(con);
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if (ws == con) {
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DLOG("Closing workspace container %s, updating EWMH atoms\n", ws->name);
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ewmh_update_desktop_properties();
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}
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con_free(con);
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if (next) {
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con_activate(next);
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} else {
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DLOG("not changing focus, the container was not focused before\n");
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}
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/* check if the parent container is empty now and close it */
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if (!dont_kill_parent)
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CALL(parent, on_remove_child);
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return true;
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}
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/*
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* Splits (horizontally or vertically) the given container by creating a new
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* container which contains the old one and the future ones.
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*
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*/
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void tree_split(Con *con, orientation_t orientation) {
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if (con_is_floating(con)) {
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DLOG("Floating containers can't be split.\n");
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return;
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}
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|
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if (con->type == CT_WORKSPACE) {
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if (con_num_children(con) < 2) {
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if (con_num_children(con) == 0) {
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DLOG("Changing workspace_layout to L_DEFAULT\n");
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con->workspace_layout = L_DEFAULT;
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}
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DLOG("Changing orientation of workspace\n");
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con->layout = (orientation == HORIZ) ? L_SPLITH : L_SPLITV;
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return;
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} else {
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/* if there is more than one container on the workspace
|
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* move them into a new container and handle this instead */
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con = workspace_encapsulate(con);
|
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}
|
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}
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Con *parent = con->parent;
|
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|
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/* Force re-rendering to make the indicator border visible. */
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con_force_split_parents_redraw(con);
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|
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/* if we are in a container whose parent contains only one
|
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* child (its split functionality is unused so far), we just change the
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* orientation (more intuitive than splitting again) */
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if (con_num_children(parent) == 1 &&
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(parent->layout == L_SPLITH ||
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parent->layout == L_SPLITV)) {
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parent->layout = (orientation == HORIZ) ? L_SPLITH : L_SPLITV;
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DLOG("Just changing orientation of existing container\n");
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return;
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}
|
||
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DLOG("Splitting in orientation %d\n", orientation);
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||
|
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/* 2: replace it with a new Con */
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Con *new = con_new(NULL, NULL);
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TAILQ_REPLACE(&(parent->nodes_head), con, new, nodes);
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TAILQ_REPLACE(&(parent->focus_head), con, new, focused);
|
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new->parent = parent;
|
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new->layout = (orientation == HORIZ) ? L_SPLITH : L_SPLITV;
|
||
|
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/* 3: swap 'percent' (resize factor) */
|
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new->percent = con->percent;
|
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con->percent = 0.0;
|
||
|
||
/* 4: add it as a child to the new Con */
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con_attach(con, new, false);
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}
|
||
|
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/*
|
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* Moves focus one level up. Returns true if focus changed.
|
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*
|
||
*/
|
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bool level_up(void) {
|
||
/* Skip over floating containers and go directly to the grandparent
|
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* (which should always be a workspace) */
|
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if (focused->parent->type == CT_FLOATING_CON) {
|
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con_activate(focused->parent->parent);
|
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return true;
|
||
}
|
||
|
||
/* We can focus up to the workspace, but not any higher in the tree */
|
||
if ((focused->parent->type != CT_CON &&
|
||
focused->parent->type != CT_WORKSPACE) ||
|
||
focused->type == CT_WORKSPACE) {
|
||
ELOG("'focus parent': Focus is already on the workspace, cannot go higher than that.\n");
|
||
return false;
|
||
}
|
||
con_activate(focused->parent);
|
||
return true;
|
||
}
|
||
|
||
/*
|
||
* Moves focus one level down. Returns true if focus changed.
|
||
*
|
||
*/
|
||
bool level_down(void) {
|
||
/* Go down the focus stack of the current node */
|
||
Con *next = TAILQ_FIRST(&(focused->focus_head));
|
||
if (next == TAILQ_END(&(focused->focus_head))) {
|
||
DLOG("cannot go down\n");
|
||
return false;
|
||
} else if (next->type == CT_FLOATING_CON) {
|
||
/* Floating cons shouldn't be directly focused; try immediately
|
||
* going to the grandchild of the focused con. */
|
||
Con *child = TAILQ_FIRST(&(next->focus_head));
|
||
if (child == TAILQ_END(&(next->focus_head))) {
|
||
DLOG("cannot go down\n");
|
||
return false;
|
||
} else
|
||
next = TAILQ_FIRST(&(next->focus_head));
|
||
}
|
||
|
||
con_activate(next);
|
||
return true;
|
||
}
|
||
|
||
static void mark_unmapped(Con *con) {
|
||
Con *current;
|
||
|
||
con->mapped = false;
|
||
TAILQ_FOREACH (current, &(con->nodes_head), nodes) {
|
||
mark_unmapped(current);
|
||
}
|
||
if (con->type == CT_WORKSPACE) {
|
||
/* We need to call mark_unmapped on floating nodes as well since we can
|
||
* make containers floating. */
|
||
TAILQ_FOREACH (current, &(con->floating_head), floating_windows) {
|
||
mark_unmapped(current);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Renders the tree, that is rendering all outputs using render_con() and
|
||
* pushing the changes to X11 using x_push_changes().
|
||
*
|
||
*/
|
||
void tree_render(void) {
|
||
if (croot == NULL)
|
||
return;
|
||
|
||
DLOG("-- BEGIN RENDERING --\n");
|
||
/* Reset map state for all nodes in tree */
|
||
/* TODO: a nicer method to walk all nodes would be good, maybe? */
|
||
mark_unmapped(croot);
|
||
croot->mapped = true;
|
||
|
||
render_con(croot);
|
||
|
||
x_push_changes(croot);
|
||
DLOG("-- END RENDERING --\n");
|
||
}
|
||
|
||
static Con *get_tree_next_workspace(Con *con, direction_t direction) {
|
||
if (con_get_fullscreen_con(con, CF_GLOBAL)) {
|
||
DLOG("Cannot change workspace while in global fullscreen mode.\n");
|
||
return NULL;
|
||
}
|
||
|
||
Output *current_output = get_output_containing(con->rect.x, con->rect.y);
|
||
if (!current_output) {
|
||
return NULL;
|
||
}
|
||
DLOG("Current output is %s\n", output_primary_name(current_output));
|
||
|
||
Output *next_output = get_output_next(direction, current_output, CLOSEST_OUTPUT);
|
||
if (!next_output) {
|
||
return NULL;
|
||
}
|
||
DLOG("Next output is %s\n", output_primary_name(next_output));
|
||
|
||
/* Find visible workspace on next output */
|
||
Con *workspace = NULL;
|
||
GREP_FIRST(workspace, output_get_content(next_output->con), workspace_is_visible(child));
|
||
return workspace;
|
||
}
|
||
|
||
/*
|
||
* Returns the next / previous container to focus in the given direction. Does
|
||
* not modify focus and ensures focus restrictions for fullscreen containers
|
||
* are respected.
|
||
*
|
||
*/
|
||
static Con *get_tree_next(Con *con, direction_t direction) {
|
||
const bool previous = position_from_direction(direction) == BEFORE;
|
||
const orientation_t orientation = orientation_from_direction(direction);
|
||
|
||
Con *first_wrap = NULL;
|
||
|
||
if (con->type == CT_WORKSPACE) {
|
||
/* Special case for FOCUS_WRAPPING_WORKSPACE: allow the focus to leave
|
||
* the workspace only when a workspace is selected. */
|
||
goto handle_workspace;
|
||
}
|
||
|
||
while (con->type != CT_WORKSPACE) {
|
||
if (con->fullscreen_mode == CF_OUTPUT) {
|
||
/* We've reached a fullscreen container. Directional focus should
|
||
* now operate on the workspace level. */
|
||
con = con_get_workspace(con);
|
||
break;
|
||
} else if (con->fullscreen_mode == CF_GLOBAL) {
|
||
/* Focus changes should happen only inside the children of a global
|
||
* fullscreen container. */
|
||
return first_wrap;
|
||
}
|
||
|
||
Con *const parent = con->parent;
|
||
if (con->type == CT_FLOATING_CON) {
|
||
if (orientation != HORIZ) {
|
||
/* up/down does not change floating containers */
|
||
return NULL;
|
||
}
|
||
|
||
/* left/right focuses the previous/next floating container */
|
||
Con *next = previous ? TAILQ_PREV(con, floating_head, floating_windows)
|
||
: TAILQ_NEXT(con, floating_windows);
|
||
/* If there is no next/previous container, wrap */
|
||
if (!next) {
|
||
next = previous ? TAILQ_LAST(&(parent->floating_head), floating_head)
|
||
: TAILQ_FIRST(&(parent->floating_head));
|
||
}
|
||
/* Our parent does not list us in floating heads? */
|
||
assert(next);
|
||
|
||
return next;
|
||
}
|
||
|
||
if (con_num_children(parent) > 1 && con_orientation(parent) == orientation) {
|
||
Con *const next = previous ? TAILQ_PREV(con, nodes_head, nodes)
|
||
: TAILQ_NEXT(con, nodes);
|
||
if (next && con_fullscreen_permits_focusing(next)) {
|
||
return next;
|
||
}
|
||
|
||
Con *const wrap = previous ? TAILQ_LAST(&(parent->nodes_head), nodes_head)
|
||
: TAILQ_FIRST(&(parent->nodes_head));
|
||
switch (config.focus_wrapping) {
|
||
case FOCUS_WRAPPING_OFF:
|
||
break;
|
||
case FOCUS_WRAPPING_WORKSPACE:
|
||
case FOCUS_WRAPPING_ON:
|
||
if (!first_wrap && con_fullscreen_permits_focusing(wrap)) {
|
||
first_wrap = wrap;
|
||
}
|
||
break;
|
||
case FOCUS_WRAPPING_FORCE:
|
||
/* 'force' should always return to ensure focus doesn't
|
||
* leave the parent. */
|
||
if (next) {
|
||
return NULL; /* blocked by fullscreen */
|
||
}
|
||
return con_fullscreen_permits_focusing(wrap) ? wrap : NULL;
|
||
}
|
||
}
|
||
|
||
con = parent;
|
||
}
|
||
|
||
assert(con->type == CT_WORKSPACE);
|
||
if (config.focus_wrapping == FOCUS_WRAPPING_WORKSPACE) {
|
||
return first_wrap;
|
||
}
|
||
|
||
handle_workspace:;
|
||
Con *workspace = get_tree_next_workspace(con, direction);
|
||
return workspace ? workspace : first_wrap;
|
||
}
|
||
|
||
/*
|
||
* Changes focus in the given direction
|
||
*
|
||
*/
|
||
void tree_next(Con *con, direction_t direction) {
|
||
Con *next = get_tree_next(con, direction);
|
||
if (!next) {
|
||
return;
|
||
}
|
||
if (next->type == CT_WORKSPACE) {
|
||
/* Show next workspace and focus appropriate container if possible. */
|
||
/* Use descend_focused first to give higher priority to floating or
|
||
* tiling fullscreen containers. */
|
||
Con *focus = con_descend_focused(next);
|
||
if (focus->fullscreen_mode == CF_NONE) {
|
||
Con *focus_tiling = con_descend_tiling_focused(next);
|
||
/* If descend_tiling returned a workspace then focus is either a
|
||
* floating container or the same workspace. */
|
||
if (focus_tiling != next) {
|
||
focus = focus_tiling;
|
||
}
|
||
}
|
||
|
||
workspace_show(next);
|
||
con_activate(focus);
|
||
x_set_warp_to(&(focus->rect));
|
||
return;
|
||
} else if (next->type == CT_FLOATING_CON) {
|
||
/* Raise the floating window on top of other windows preserving relative
|
||
* stack order */
|
||
Con *parent = next->parent;
|
||
while (TAILQ_LAST(&(parent->floating_head), floating_head) != next) {
|
||
Con *last = TAILQ_LAST(&(parent->floating_head), floating_head);
|
||
TAILQ_REMOVE(&(parent->floating_head), last, floating_windows);
|
||
TAILQ_INSERT_HEAD(&(parent->floating_head), last, floating_windows);
|
||
}
|
||
}
|
||
|
||
workspace_show(con_get_workspace(next));
|
||
con_activate(con_descend_focused(next));
|
||
}
|
||
|
||
/*
|
||
* Get the previous / next sibling
|
||
*
|
||
*/
|
||
Con *get_tree_next_sibling(Con *con, position_t direction) {
|
||
Con *to_focus = (direction == BEFORE ? TAILQ_PREV(con, nodes_head, nodes)
|
||
: TAILQ_NEXT(con, nodes));
|
||
if (to_focus && con_fullscreen_permits_focusing(to_focus)) {
|
||
return to_focus;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/*
|
||
* tree_flatten() removes pairs of redundant split containers, e.g.:
|
||
* [workspace, horizontal]
|
||
* [v-split] [child3]
|
||
* [h-split]
|
||
* [child1] [child2]
|
||
* In this example, the v-split and h-split container are redundant.
|
||
* Such a situation can be created by moving containers in a direction which is
|
||
* not the orientation of their parent container. i3 needs to create a new
|
||
* split container then and if you move containers this way multiple times,
|
||
* redundant chains of split-containers can be the result.
|
||
*
|
||
*/
|
||
void tree_flatten(Con *con) {
|
||
Con *current, *child, *parent = con->parent;
|
||
DLOG("Checking if I can flatten con = %p / %s\n", con, con->name);
|
||
|
||
/* We only consider normal containers without windows */
|
||
if (con->type != CT_CON ||
|
||
parent->layout == L_OUTPUT || /* con == "content" */
|
||
con->window != NULL)
|
||
goto recurse;
|
||
|
||
/* Ensure it got only one child */
|
||
child = TAILQ_FIRST(&(con->nodes_head));
|
||
if (child == NULL || TAILQ_NEXT(child, nodes) != NULL)
|
||
goto recurse;
|
||
|
||
DLOG("child = %p, con = %p, parent = %p\n", child, con, parent);
|
||
|
||
/* The child must have a different orientation than the con but the same as
|
||
* the con’s parent to be redundant */
|
||
if (!con_is_split(con) ||
|
||
!con_is_split(child) ||
|
||
(con->layout != L_SPLITH && con->layout != L_SPLITV) ||
|
||
(child->layout != L_SPLITH && child->layout != L_SPLITV) ||
|
||
con_orientation(con) == con_orientation(child) ||
|
||
con_orientation(child) != con_orientation(parent))
|
||
goto recurse;
|
||
|
||
DLOG("Alright, I have to flatten this situation now. Stay calm.\n");
|
||
/* 1: save focus */
|
||
Con *focus_next = TAILQ_FIRST(&(child->focus_head));
|
||
|
||
DLOG("detaching...\n");
|
||
/* 2: re-attach the children to the parent before con */
|
||
while (!TAILQ_EMPTY(&(child->nodes_head))) {
|
||
current = TAILQ_FIRST(&(child->nodes_head));
|
||
DLOG("detaching current=%p / %s\n", current, current->name);
|
||
con_detach(current);
|
||
DLOG("re-attaching\n");
|
||
/* We don’t use con_attach() here because for a CT_CON, the special
|
||
* case handling of con_attach() does not trigger. So all it would do
|
||
* is calling TAILQ_INSERT_AFTER, but with the wrong container. So we
|
||
* directly use the TAILQ macros. */
|
||
current->parent = parent;
|
||
TAILQ_INSERT_BEFORE(con, current, nodes);
|
||
DLOG("attaching to focus list\n");
|
||
TAILQ_INSERT_TAIL(&(parent->focus_head), current, focused);
|
||
current->percent = con->percent;
|
||
}
|
||
DLOG("re-attached all\n");
|
||
|
||
/* 3: restore focus, if con was focused */
|
||
if (focus_next != NULL &&
|
||
TAILQ_FIRST(&(parent->focus_head)) == con) {
|
||
DLOG("restoring focus to focus_next=%p\n", focus_next);
|
||
TAILQ_REMOVE(&(parent->focus_head), focus_next, focused);
|
||
TAILQ_INSERT_HEAD(&(parent->focus_head), focus_next, focused);
|
||
DLOG("restored focus.\n");
|
||
}
|
||
|
||
/* 4: close the redundant cons */
|
||
DLOG("closing redundant cons\n");
|
||
tree_close_internal(con, DONT_KILL_WINDOW, true);
|
||
|
||
/* Well, we got to abort the recursion here because we destroyed the
|
||
* container. However, if tree_flatten() is called sufficiently often,
|
||
* there can’t be the situation of having two pairs of redundant containers
|
||
* at once. Therefore, we can safely abort the recursion on this level
|
||
* after flattening. */
|
||
return;
|
||
|
||
recurse:
|
||
/* We cannot use normal foreach here because tree_flatten might close the
|
||
* current container. */
|
||
current = TAILQ_FIRST(&(con->nodes_head));
|
||
while (current != NULL) {
|
||
Con *next = TAILQ_NEXT(current, nodes);
|
||
tree_flatten(current);
|
||
current = next;
|
||
}
|
||
|
||
current = TAILQ_FIRST(&(con->floating_head));
|
||
while (current != NULL) {
|
||
Con *next = TAILQ_NEXT(current, floating_windows);
|
||
tree_flatten(current);
|
||
current = next;
|
||
}
|
||
}
|