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/***************************************************************************
* Copyright (C) 2008-2014 by Andrzej Rybczak *
* electricityispower@gmail.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef NCMPCPP_BINDINGS_H
#define NCMPCPP_BINDINGS_H
#include <algorithm>
#include <boost/bind.hpp>
#include <cassert>
#include <unordered_map>
#include "actions.h"
#include "macro_utilities.h"
/// Key for binding actions to it. Supports non-ascii characters.
struct Key
{
enum Type { Standard, NCurses };
Key(wchar_t ch, Type ct) : m_char(ch), m_type(ct) { }
wchar_t getChar() const {
return m_char;
}
Type getType() const {
return m_type;
}
# define KEYS_DEFINE_OPERATOR(CMP) \
bool operator CMP (const Key &k) const { \
if (m_char CMP k.m_char) \
return true; \
if (m_char != k.m_char) \
return false; \
return m_type CMP k.m_type; \
}
KEYS_DEFINE_OPERATOR(<);
KEYS_DEFINE_OPERATOR(<=);
KEYS_DEFINE_OPERATOR(>);
KEYS_DEFINE_OPERATOR(>=);
# undef KEYS_DEFINE_OPERATOR
bool operator==(const Key &k) const {
return m_char == k.m_char && m_type == k.m_type;
}
bool operator!=(const Key &k) const {
return !(*this == k);
}
static Key read(NC::Window &w);
static Key noOp;
private:
wchar_t m_char;
Type m_type;
};
/// Represents either single action or chain of actions bound to a certain key
struct Binding
{
typedef std::vector<Actions::BaseAction *> ActionChain;
template <typename ArgT>
Binding(ArgT &&actions)
: m_actions(std::forward<ArgT>(actions)) {
assert(!m_actions.empty());
}
Binding(Actions::Type at)
: Binding(ActionChain({&Actions::get(at)})) { }
bool execute() const {
return std::all_of(m_actions.begin(), m_actions.end(),
boost::bind(&Actions::BaseAction::execute, _1)
);
}
bool isSingle() const {
return m_actions.size() == 1;
}
Actions::BaseAction *action() const {
assert(isSingle());
return m_actions[0];
}
private:
ActionChain m_actions;
};
/// Represents executable command
struct Command
{
template <typename ArgT>
Command(ArgT &&binding_, bool immediate_)
: m_binding(std::forward<ArgT>(binding_)), m_immediate(immediate_) { }
const Binding &binding() const { return m_binding; }
bool immediate() const { return m_immediate; }
private:
Binding m_binding;
bool m_immediate;
};
/// Keybindings configuration
class BindingsConfiguration
{
struct KeyHash {
size_t operator()(const Key &k) const {
return (k.getChar() << 1) | (k.getType() == Key::Standard);
}
};
typedef std::unordered_map<std::string, Command> CommandsSet;
typedef std::unordered_map<Key, std::vector<Binding>, KeyHash> BindingsMap;
public:
typedef BindingsMap::value_type::second_type::iterator BindingIterator;
typedef BindingsMap::value_type::second_type::const_iterator ConstBindingIterator;
bool read(const std::string &file);
void generateDefaults();
const Command *findCommand(const std::string &name) {
const Command *ptr = 0;
auto it = m_commands.find(name);
if (it != m_commands.end())
ptr = &it->second;
return ptr;
}
std::pair<BindingIterator, BindingIterator> get(const Key &k) {
std::pair<BindingIterator, BindingIterator> result;
auto it = m_bindings.find(k);
if (it != m_bindings.end()) {
result.first = it->second.begin();
result.second = it->second.end();
} else {
auto list_end = m_bindings.begin()->second.end();
result.first = list_end;
result.second = list_end;
}
return result;
}
BindingsMap::const_iterator begin() const { return m_bindings.begin(); }
BindingsMap::const_iterator end() const { return m_bindings.end(); }
private:
bool notBound(const Key &k) const {
return k != Key::noOp && m_bindings.find(k) == m_bindings.end();
}
template <typename ArgT>
void bind(Key k, ArgT &&t) {
m_bindings[k].push_back(std::forward<ArgT>(t));
}
BindingsMap m_bindings;
CommandsSet m_commands;
};
extern BindingsConfiguration Bindings;
#endif // NCMPCPP_BINDINGS_H
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