openbox/keytree.c (raw)
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/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*- keytree.c for the Openbox window manager Copyright (c) 2006 Mikael Magnusson Copyright (c) 2003 Ben Jansens This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. See the COPYING file for a copy of the GNU General Public License. */ #include "keyboard.h" #include "translate.h" #include <glib.h> void tree_destroy(KeyBindingTree *tree) { KeyBindingTree *c; while (tree) { tree_destroy(tree->next_sibling); c = tree->first_child; if (c == NULL) { GList *it; GSList *sit; for (it = tree->keylist; it != NULL; it = it->next) g_free(it->data); g_list_free(tree->keylist); for (sit = tree->actions; sit != NULL; sit = sit->next) action_unref(sit->data); g_slist_free(tree->actions); } g_free(tree); tree = c; } } KeyBindingTree *tree_build(GList *keylist) { GList *it; KeyBindingTree *ret = NULL, *p; if (g_list_length(keylist) <= 0) return NULL; /* nothing in the list.. */ for (it = g_list_last(keylist); it; it = g_list_previous(it)) { p = ret; ret = g_new0(KeyBindingTree, 1); if (p == NULL) { GList *it; /* this is the first built node, the bottom node of the tree */ ret->keylist = g_list_copy(keylist); /* shallow copy */ for (it = ret->keylist; it; it = g_list_next(it)) /* deep copy */ it->data = g_strdup(it->data); } ret->first_child = p; if (!translate_key(it->data, &ret->state, &ret->key)) { tree_destroy(ret); return NULL; } } return ret; } void tree_assimilate(KeyBindingTree *node) { KeyBindingTree *a, *b, *tmp, *last; if (keyboard_firstnode == NULL) { /* there are no nodes at this level yet */ keyboard_firstnode = node; } else { a = keyboard_firstnode; last = a; b = node; while (a) { last = a; if (!(a->state == b->state && a->key == b->key)) { a = a->next_sibling; } else { tmp = b; b = b->first_child; g_free(tmp); a = a->first_child; } } if (!(last->state == b->state && last->key == b->key)) last->next_sibling = b; else { last->first_child = b->first_child; g_free(b); } } } KeyBindingTree *tree_find(KeyBindingTree *search, gboolean *conflict) { KeyBindingTree *a, *b; *conflict = FALSE; a = keyboard_firstnode; b = search; while (a && b) { if (!(a->state == b->state && a->key == b->key)) { a = a->next_sibling; } else { if ((a->first_child == NULL) == (b->first_child == NULL)) { if (a->first_child == NULL) { /* found it! (return the actual node, not the search's) */ return a; } } else { *conflict = TRUE; return NULL; /* the chain status' don't match (conflict!) */ } b = b->first_child; a = a->first_child; } } return NULL; /* it just isn't in here */ } |