openbox/keytree.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    keytree.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "keyboard.h"
  21 #include "translate.h"
  22 #include "actions.h"
  23 #include <glib.h>
  24
  25 void tree_destroy(KeyBindingTree *tree)
  26 {
  27     KeyBindingTree *c;
  28
  29     while (tree) {
  30         tree_destroy(tree->next_sibling);
  31         c = tree->first_child;
  32         if (c == NULL) {
  33             GList *it;
  34             GSList *sit;
  35             for (it = tree->keylist; it != NULL; it = it->next)
  36                 g_free(it->data);
  37             g_list_free(tree->keylist);
  38             for (sit = tree->actions; sit != NULL; sit = sit->next)
  39                 actions_act_unref(sit->data);
  40             g_slist_free(tree->actions);
  41         }
  42         g_slice_free(KeyBindingTree, tree);
  43         tree = c;
  44     }
  45 }
  46
  47 KeyBindingTree *tree_build(GList *keylist)
  48 {
  49     GList *it;
  50     KeyBindingTree *ret = NULL, *p;
  51
  52     if (g_list_length(keylist) <= 0)
  53         return NULL; /* nothing in the list.. */
  54
  55     for (it = g_list_last(keylist); it; it = g_list_previous(it)) {
  56         GList *kit;
  57
  58         p = ret;
  59         ret = g_slice_new0(KeyBindingTree);
  60
  61         for (kit = it; kit != NULL; kit = g_list_previous(kit))
  62             ret->keylist = g_list_prepend(ret->keylist,
  63                                           g_strdup(kit->data)); /* deep copy */
  64         ret->first_child = p;
  65         if (p != NULL) p->parent = ret;
  66         translate_key(it->data, &ret->state, &ret->key);
  67     }
  68     return ret;
  69 }
  70
  71 void tree_assimilate(KeyBindingTree *node)
  72 {
  73     KeyBindingTree *a, *b, *tmp, *last;
  74
  75     if (keyboard_firstnode == NULL) {
  76         /* there are no nodes at this level yet */
  77         keyboard_firstnode = node;
  78     } else {
  79         a = keyboard_firstnode;
  80         last = a;
  81         b = node;
  82         while (a) {
  83             last = a;
  84             /* check b->key != 0 for key bindings that didn't get translated */
  85             if (!(a->state == b->state && a->key == b->key && b->key != 0)) {
  86                 a = a->next_sibling;
  87             } else {
  88                 tmp = b;
  89                 b = b->first_child;
  90                 g_slice_free(KeyBindingTree, tmp);
  91                 a = a->first_child;
  92             }
  93         }
  94         /* check b->key != 0, and save key bindings that didn't get translated
  95            as siblings here */
  96         if (!(last->state == b->state && last->key == b->key && b->key != 0)) {
  97             last->next_sibling = b;
  98             b->parent = last->parent;
  99         } else {
 100             last->first_child = b->first_child;
 101             last->first_child->parent = last;
 102             g_slice_free(KeyBindingTree, b);
 103         }
 104     }
 105 }
 106
 107 KeyBindingTree *tree_find(KeyBindingTree *search, gboolean *conflict)
 108 {
 109     KeyBindingTree *a, *b;
 110
 111     *conflict = FALSE;
 112
 113     a = keyboard_firstnode;
 114     b = search;
 115     while (a && b) {
 116         /* check b->key != 0 for key bindings that didn't get translated, and
 117            don't make them conflict with anything else so that they can all
 118            live together in peace and harmony */
 119         if (!(a->state == b->state && a->key == b->key && b->key != 0)) {
 120             a = a->next_sibling;
 121         } else {
 122             if ((a->first_child == NULL) == (b->first_child == NULL)) {
 123                 if (a->first_child == NULL) {
 124                     /* found it! (return the actual node, not the search's) */
 125                     return a;
 126                 }
 127             } else {
 128                 *conflict = TRUE;
 129                 return NULL; /* the chain status' don't match (conflict!) */
 130             }
 131             b = b->first_child;
 132             a = a->first_child;
 133         }
 134     }
 135     return NULL; /* it just isn't in here */
 136 }
 137
 138 gboolean tree_chroot(KeyBindingTree *tree, GList *keylist)
 139 {
 140     guint key, state;
 141     translate_key(keylist->data, &state, &key);
 142     while (tree != NULL && !(tree->state == state && tree->key == key))
 143         tree = tree->next_sibling;
 144     if (tree != NULL) {
 145         if (keylist->next == NULL) {
 146             tree->chroot = TRUE;
 147             return TRUE;
 148         } else
 149             return tree_chroot(tree->first_child, keylist->next);
 150     }
 151     return FALSE;
 152 }