src/bindings.h

   1 /***************************************************************************
   2  *   Copyright (C) 2008-2014 by Andrzej Rybczak                            *
   3  *   electricityispower@gmail.com                                          *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
  19  ***************************************************************************/
  20
  21 #ifndef NCMPCPP_BINDINGS_H
  22 #define NCMPCPP_BINDINGS_H
  23
  24 #include <algorithm>
  25 #include <cassert>
  26 #include <unordered_map>
  27 #include "actions.h"
  28 #include "macro_utilities.h"
  29
  30 NC::Key::Type readKey(NC::Window &w);
  31 std::wstring keyToWString(const NC::Key::Type key);
  32
  33 /// Represents either single action or chain of actions bound to a certain key
  34 struct Binding
  35 {
  36         typedef std::vector<Actions::BaseAction *> ActionChain;
  37
  38         template <typename ArgT>
  39         Binding(ArgT &&actions)
  40         : m_actions(std::forward<ArgT>(actions)) {
  41                 assert(!m_actions.empty());
  42         }
  43         Binding(Actions::Type at)
  44         : Binding(ActionChain({&Actions::get(at)})) { }
  45
  46         bool execute() const {
  47                 return std::all_of(m_actions.begin(), m_actions.end(),
  48                         std::bind(&Actions::BaseAction::execute, std::placeholders::_1)
  49                 );
  50         }
  51
  52         bool isSingle() const {
  53                 return m_actions.size() == 1;
  54         }
  55
  56         Actions::BaseAction *action() const {
  57                 assert(isSingle());
  58                 return m_actions[0];
  59         }
  60
  61 private:
  62         ActionChain m_actions;
  63 };
  64
  65 /// Represents executable command
  66 struct Command
  67 {
  68         template <typename ArgT>
  69         Command(ArgT &&binding_, bool immediate_)
  70         : m_impl(std::forward<ArgT>(binding_), immediate_) { }
  71
  72         const Binding &binding() const { return std::get<0>(m_impl); }
  73         bool immediate() const { return std::get<1>(m_impl); }
  74
  75 private:
  76         std::tuple<Binding, bool> m_impl;
  77 };
  78
  79 /// Keybindings configuration
  80 class BindingsConfiguration
  81 {
  82         typedef std::unordered_map<std::string, Command> CommandsSet;
  83         typedef std::unordered_map<NC::Key::Type, std::vector<Binding>> BindingsMap;
  84
  85 public:
  86         typedef BindingsMap::value_type::second_type::iterator BindingIterator;
  87         typedef BindingsMap::value_type::second_type::const_iterator ConstBindingIterator;
  88         typedef std::pair<BindingIterator, BindingIterator> BindingIteratorPair;
  89
  90         bool read(const std::string &file);
  91         void generateDefaults();
  92
  93         const Command *findCommand(const std::string &name);
  94         BindingIteratorPair get(const NC::Key::Type &k);
  95
  96         BindingsMap::const_iterator begin() const { return m_bindings.begin(); }
  97         BindingsMap::const_iterator end() const { return m_bindings.end(); }
  98
  99 private:
 100         bool notBound(const NC::Key::Type &k) const {
 101                 return k != NC::Key::None && m_bindings.find(k) == m_bindings.end();
 102         }
 103
 104         template <typename ArgT>
 105         void bind(NC::Key::Type k, ArgT &&t) {
 106                 m_bindings[k].push_back(std::forward<ArgT>(t));
 107         }
 108
 109         BindingsMap m_bindings;
 110         CommandsSet m_commands;
 111 };
 112
 113 extern BindingsConfiguration Bindings;
 114
 115 #endif // NCMPCPP_BINDINGS_H