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 #include <string>
  26
  27 using std::string;
  28
  29
  30 keytree::keytree(Display *display) : _display(display)
  31 {
  32   _head = new keynode;
  33   _head->parent = NULL;
  34   _head->action = NULL; // head's action is always NULL
  35   _current = _head;
  36 }
  37
  38 keytree::~keytree()
  39 {
  40   clearTree(_head);
  41 }
  42
  43 void keytree::clearTree(keynode *node)
  44 {
  45   if (!node)
  46     return;
  47
  48   ChildList::iterator it, end = node->children.end();
  49   for (it = node->children.begin(); it != end; ++it)
  50     clearTree(*it);
  51
  52   if (node->action)
  53     delete node->action;
  54   delete node;
  55 }
  56
  57 void keytree::grabDefaults(screen *scr)
  58 {
  59   grabChildren(_head, scr);
  60 }
  61
  62 void keytree::grabChildren(keynode *node, screen *scr)
  63 {
  64   ChildList::const_iterator it, end = node->children.end();
  65   for (it = node->children.begin(); it != end; ++it)
  66     if ( (*it)->action )
  67       scr->grabKey( (*it)->action->keycode(), (*it)->action->modifierMask() );
  68 }
  69
  70 void keytree::ungrabChildren(keynode *node, screen *scr)
  71 {
  72   ChildList::const_iterator it, end = node->children.end();
  73   for (it = node->children.begin(); it != end; ++it)
  74     if ( (*it)->action )
  75       scr->ungrabKey( (*it)->action->keycode(), (*it)->action->modifierMask());
  76 }
  77
  78 const Action * keytree::getAction(const XEvent &e, unsigned int state,
  79                                   screen *scr)
  80 {
  81   Action *act;
  82
  83   if (_current != _head)
  84     ungrabChildren(_current, scr);
  85
  86   ChildList::const_iterator it, end = _current->children.end();
  87   for (it = _current->children.begin(); it != end; ++it) {
  88     act = (*it)->action;
  89     if (e.xkey.keycode == act->keycode() && state == act->modifierMask()) {
  90       if ( isLeaf(*it) ) {
  91         _current = _head;
  92         return act;
  93       }
  94       else {
  95         _current = *it;
  96         grabChildren(_current, scr);
  97         return (const Action *)NULL;
  98       }
  99     }
 100   }
 101
 102   // action not found. back to the head
 103   _current = _head;
 104   return (const Action *)NULL;
 105 }
 106
 107 void keytree::addAction(Action::ActionType action, unsigned int mask,
 108                         string key, string arg)
 109 {
 110   // can't grab non-modifier as topmost key
 111   if (_current == _head && (mask == 0 || mask == ShiftMask))
 112     return;
 113
 114   keynode *tmp = new keynode;
 115   tmp->action = new Action(action,
 116                            XKeysymToKeycode(_display,
 117                                             XStringToKeysym(key.c_str())),
 118                            mask, arg);
 119   tmp->parent = _current;
 120   _current->children.push_back(tmp);
 121 }
 122
 123 void keytree::advanceOnNewNode()
 124 {
 125   keynode *tmp = new keynode;
 126   tmp->action = NULL;
 127   tmp->parent = _current;
 128   _current->children.push_back(tmp);
 129   _current = tmp;
 130 }
 131
 132 void keytree::retract()
 133 {
 134   if (_current != _head)
 135     _current = _current->parent;
 136 }
 137
 138 void keytree::setCurrentNodeProps(Action::ActionType action, unsigned int mask,
 139                                   string key, string arg)
 140 {
 141   if (_current->action)
 142     delete _current->action;
 143   _current->action = new Action(action,
 144                                 XKeysymToKeycode(_display,
 145                                                  XStringToKeysym(key.c_str())),
 146                                 mask, arg);
 147 }