Dogcows Code - chaz/openbox/blob - src/bindings.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef HAVE_CONFIG_H
   4 # include "../config.h"
   5 #endif
   6
   7 #include "bindings.hh"
   8 #include "otk/display.hh"
   9
  10 extern "C" {
  11 #include <X11/Xlib.h>
  12 }
  13
  14 namespace ob {
  15
  16 #include <stdio.h>
  17 static void print_branch(BindingTree *first, std::string str)
  18 {
  19   BindingTree *p = first;
  20
  21   while (p) {
  22     if (p->first_child)
  23       print_branch(p->first_child, str + " " + p->text);
  24     printf("%d%s\n", p->id, (str + " " + p->text).c_str());
  25     BindingTree *s = p->next_sibling;
  26     delete p;
  27     p = s;
  28   }
  29 }
  30
  31
  32 void OBBindings::display()
  33 {
  34   if (_bindings.first_child)
  35     print_branch(_bindings.first_child, "");
  36 }
  37
  38
  39
  40 static bool translate(const std::string str, Binding &b)
  41 {
  42   KeySym sym = XStringToKeysym(const_cast<char *>(str.c_str()));
  43   if (sym == NoSymbol) return false;
  44   b.modifiers = Mod1Mask;
  45   b.key = XKeysymToKeycode(otk::OBDisplay::display, sym);
  46   return b.key != 0;
  47 }
  48
  49 static BindingTree *buildtree(const OBBindings::StringVect &keylist, int id)
  50 {
  51   if (keylist.empty()) return 0; // nothing in the list.. return 0
  52
  53   BindingTree *ret = new BindingTree(id), *p = 0;
  54
  55   OBBindings::StringVect::const_iterator it, end = keylist.end();
  56   for (it = keylist.begin(); it != end; ++it) {
  57     if (p)
  58       p = p->first_child = new BindingTree(id);
  59     else
  60       p = ret; // the first node
  61
  62     if (!translate(*it, p->binding))
  63       break;
  64     p->text = *it;
  65   }
  66   if (it != end) {
  67     // build failed.. clean up and return 0
  68     p = ret;
  69     while (p->first_child) {
  70       BindingTree *c = p->first_child;
  71       delete p;
  72       p = c;
  73     }
  74     delete p;
  75     return 0;
  76   } else {
  77     // set the proper chain status on the last node
  78     p->chain = false;
  79   }
  80
  81   printf("<BUILDING>\n");
  82   print_branch(ret, "");
  83   printf("</BUILDING>\n");
  84
  85   // successfully built a tree
  86   return ret;
  87 }
  88
  89 static void destroytree(BindingTree *tree)
  90 {
  91   while (tree) {
  92     BindingTree *c = tree->first_child;
  93     delete tree;
  94     tree = c;
  95   }
  96 }
  97
  98 OBBindings::OBBindings()
  99 {
 100 }
 101
 102
 103 OBBindings::~OBBindings()
 104 {
 105   remove_all();
 106 }
 107
 108
 109 static void assimilate(BindingTree *parent, BindingTree *node)
 110 {
 111   BindingTree *p, *lastsib, *nextparent, *nextnode = node->first_child;
 112
 113   if (!parent->first_child) {
 114     // there are no nodes at this level yet
 115     parent->first_child = node;
 116     nextparent = node;
 117   } else {
 118     p = lastsib = parent->first_child;
 119
 120     while (p->next_sibling) {
 121       p = p->next_sibling;
 122       lastsib = p; // finds the last sibling
 123       if (p->binding == node->binding) {
 124         // found an identical binding..
 125         assert(node->chain && p->chain);
 126         delete node; // kill the one we aren't using
 127         break;
 128       }
 129     }
 130     if (!p) {
 131       // couldn't find an existing binding, use this new one, and insert it
 132       // into the list
 133       p = lastsib->next_sibling = node;
 134     }
 135     nextparent = p;
 136   }
 137
 138   if (nextnode)
 139     assimilate(nextparent, nextnode);
 140 }
 141
 142
 143 static int find_bind(BindingTree *tree, BindingTree *search) {
 144   BindingTree *a, *b;
 145   a = tree;
 146   b = search;
 147   while (a && b) {
 148     if (a->binding != b->binding) {
 149       a = a->next_sibling;
 150     } else {
 151       if (a->chain == b->chain) {
 152         if (!a->chain)
 153           return a->id; // found it! (return the actual id, not the search's)
 154       } else
 155           return -2; // the chain status' don't match (conflict!)
 156       b = b->first_child;
 157       a = a->first_child;
 158     }
 159   }
 160   return -1; // it just isn't in here
 161 }
 162
 163 /*
 164 static int find(BindingTree *parent, BindingTree *node) {
 165   BindingTree *p, *lastsib, *nextparent, *nextnode = node->first_child;
 166
 167   if (!parent->first_child)
 168     return -1;
 169
 170   p = parent->first_child;
 171   while (p) {
 172     if (node->binding == p->binding) {
 173       if (node->chain == p->chain) {
 174         if (!node->chain) {
 175           return p->id; // found it! (return the actual id, not the search's)
 176         } else {
 177           break; // go on to the next child in the chain
 178         }
 179       } else {
 180         return -2; // the chain status' don't match (conflict!)
 181       }
 182     }
 183     p = p->next_sibling;
 184   }
 185   if (!p) return -1; // doesn't exist
 186
 187   if (node->chain) {
 188     assert(node->first_child);
 189     return find(p, node->first_child);
 190   } else
 191     return -1; // it just isnt in here
 192 }
 193 */
 194
 195 bool OBBindings::add(const StringVect &keylist, int id)
 196 {
 197   BindingTree *tree;
 198
 199   if (!(tree = buildtree(keylist, id)))
 200     return false; // invalid binding requested
 201
 202   if (find_bind(_bindings.first_child, tree) < -1) {
 203     // conflicts with another binding
 204     destroytree(tree);
 205     return false;
 206   }
 207
 208   // assimilate this built tree into the main tree
 209   assimilate(&_bindings, tree); // assimilation destroys/uses the tree
 210   return true;
 211 }
 212
 213
 214 int OBBindings::find(const StringVect &keylist)
 215 {
 216   BindingTree *tree;
 217   bool ret;
 218
 219   if (!(tree = buildtree(keylist, 0)))
 220     return false; // invalid binding requested
 221
 222   ret = find_bind(_bindings.first_child, tree) >= 0;
 223
 224   destroytree(tree);
 225
 226   return ret;
 227 }
 228
 229
 230 int OBBindings::remove(const StringVect &keylist)
 231 {
 232   (void)keylist;
 233   assert(false); // XXX: function not implemented yet
 234 }
 235
 236
 237 static void remove_branch(BindingTree *first)
 238 {
 239   BindingTree *p = first;
 240
 241   while (p) {
 242     if (p->first_child)
 243       remove_branch(p->first_child);
 244     BindingTree *s = p->next_sibling;
 245     delete p;
 246     p = s;
 247   }
 248 }
 249
 250
 251 void OBBindings::remove_all()
 252 {
 253   if (_bindings.first_child)
 254     remove_branch(_bindings.first_child);
 255 }
 256
 257 }