Dogcows Code - chaz/openbox/blob - util/epist/keytree.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; -*-
   2 // keytree.cc for Epistophy - a key handler for NETWM/EWMH window managers.
   3 // Copyright (c) 2002 - 2002 Ben Jansens <ben at orodu.net>
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining a
   6 // copy of this software and associated documentation files (the "Software"),
   7 // to deal in the Software without restriction, including without limitation
   8 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 // and/or sell copies of the Software, and to permit persons to whom the
  10 // Software is furnished to do so, subject to the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be included in
  13 // all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21 // DEALINGS IN THE SOFTWARE.
  22
  23 #include "keytree.hh"
  24
  25 keytree::keytree(Display *display) : _display(display)
  26 {
  27   _head = new keynode;
  28   _head->parent = NULL;
  29   _head->action = NULL; // head's action is always NULL
  30   _current = _head;
  31 }
  32
  33 keytree::~keytree()
  34 {
  35   clearTree(_head);
  36 }
  37
  38 void keytree::clearTree(keynode *node)
  39 {
  40   if (!node)
  41     return;
  42
  43   ChildList::iterator it, end = node->children.end();
  44   for (it = node->children.begin(); it != end; ++it)
  45     clearTree(*it);
  46
  47   if (node->action)
  48     delete node->action;
  49   delete node;
  50 }
  51
  52 void keytree::grabDefaults(screen *scr)
  53 {
  54   grabChildren(_head, scr);
  55 }
  56
  57 void keytree::grabChildren(keynode *node, screen *scr)
  58 {
  59   ChildList::const_iterator it, end = node->children.end();
  60   for (it = node->children.begin(); it != end; ++it)
  61     if ( (*it)->action )
  62       scr->grabKey( (*it)->action->keycode(), (*it)->action->modifierMask() );
  63 }
  64
  65 void keytree::ungrabChildren(keynode *node, screen *scr)
  66 {
  67   ChildList::const_iterator it, end = node->children.end();
  68   for (it = node->children.begin(); it != end; ++it)
  69     if ( (*it)->action )
  70       scr->ungrabKey( (*it)->action->keycode(), (*it)->action->modifierMask());
  71 }
  72
  73 const Action * keytree::getAction(const XEvent &e, unsigned int state,
  74                                   screen *scr)
  75 {
  76   Action *act;
  77
  78   if (_current != _head)
  79     ungrabChildren(_current, scr);
  80
  81   ChildList::const_iterator it, end = _current->children.end();
  82   for (it = _current->children.begin(); it != end; ++it) {
  83     act = (*it)->action;
  84     if (e.xkey.keycode == act->keycode() && state == act->modifierMask()) {
  85       if ( isLeaf(*it) ) {
  86         _current = _head;
  87         return act;
  88       }
  89       else {
  90         _current = *it;
  91         grabChildren(_current, scr);
  92         return (const Action *)NULL;
  93       }
  94     }
  95   }
  96
  97   // action not found. back to the head
  98   _current = _head;
  99   return (const Action *)NULL;
 100 }
 101
 102 void keytree::addAction(Action::ActionType action, unsigned int mask,
 103                         string key, string arg)
 104 {
 105   // can't grab non-modifier as topmost key
 106   if (_current == _head && (mask == 0 || mask == ShiftMask))
 107     return;
 108
 109   keynode *tmp = new keynode;
 110   tmp->action = new Action(action,
 111                            XKeysymToKeycode(_display,
 112                                             XStringToKeysym(key.c_str())),
 113                            mask, arg);
 114   tmp->parent = _current;
 115   _current->children.push_back(tmp);
 116 }
 117
 118 void keytree::advanceOnNewNode()
 119 {
 120   keynode *tmp = new keynode;
 121   tmp->action = NULL;
 122   tmp->parent = _current;
 123   _current->children.push_back(tmp);
 124   _current = tmp;
 125 }
 126
 127 void keytree::retract()
 128 {
 129   if (_current != _head)
 130     _current = _current->parent;
 131 }
 132
 133 void keytree::setCurrentNodeProps(Action::ActionType action, unsigned int mask,
 134                                   string key, string arg)
 135 {
 136   if (_current->action)
 137     delete _current->action;
 138   _current->action = new Action(action,
 139                                 XKeysymToKeycode(_display,
 140                                                  XStringToKeysym(key.c_str())),
 141                                 mask, arg);
 142 }