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/* Copyright (c) 2015-2016, Stanislaw Halik <sthalik@misaki.pl>
* Permission to use, copy, modify, and/or distribute this
* software for any purpose with or without fee is hereby granted,
* provided that the above copyright notice and this permission
* notice appear in all copies.
*/
#pragma once
#include "export.hpp"
#include "bundle.hpp"
#include "slider.hpp"
#include "base-value.hpp"
#include "value-traits.hpp"
#include "compat/macros.hpp"
#include <type_traits>
#include <utility>
#include <QMetaType>
namespace options::detail {
template<typename t>
class dereference_wrapper final
{
t x;
public:
constexpr t const* operator->() const { return &x; }
constexpr t* operator->() { return &x; }
constexpr explicit dereference_wrapper(t&& x) : x(x) {}
};
} // ns options::detail
namespace options {
template<typename u>
class value final : public value_
{
using t = remove_cvref_t<u>;
const t def;
using traits = detail::value_traits<t>;
cc_noinline
t get() const noexcept
{
if (!b->contains(self_name))
return traits::pass_value(def);
QVariant variant = b->get_variant(self_name);
if (variant.isNull() || !variant.isValid())
return traits::pass_value(def);
return traits::pass_value(traits::value_with_default(traits::value_from_qvariant(variant), def));
}
cc_noinline
void store_variant(QVariant&& value) noexcept override
{
if (traits::is_equal(get(), traits::value_from_qvariant(value)))
return;
if (value.isValid() && !value.isNull())
b->store_kv(self_name, value);
else
b->store_kv(self_name, traits::qvariant_from_value(def));
}
cc_noinline
void store_variant(const QVariant& value) noexcept override
{
QVariant copy{value};
store_variant(std::move(copy));
}
bool is_null() const
{
return self_name.isEmpty() || b->name().isEmpty();
}
public:
QVariant get_variant() const noexcept override
{
if (QVariant ret{b->get_variant(self_name)}; ret.isValid() && !ret.isNull())
return ret;
return traits::qvariant_from_value(def);
}
void notify() const override
{
if (!is_null())
emit valueChanged(traits::storage_from_value(get()));
}
value<u>& operator=(t&& datum) noexcept
{
store_variant(traits::qvariant_from_value(traits::pass_value(datum)));
return *this;
}
value<u>& operator=(const t& datum) noexcept
{
t copy{datum};
*this = std::move(copy);
return *this;
}
value<u>& operator=(const value<u>& datum) noexcept
{
*this = *datum;
return *this;
}
static constexpr Qt::ConnectionType DIRECT_CONNTYPE = Qt::DirectConnection;
static constexpr Qt::ConnectionType SAFE_CONNTYPE = Qt::QueuedConnection;
value(bundle b, const QString& name, t def) noexcept : value_(b, name), def(std::move(def))
{
}
value(const value<u>& other) noexcept : value{other.b, other.self_name, other.def} {}
t default_value() const
{
return def;
}
void set_to_default() noexcept override
{
*this = def;
}
operator t() const { return get(); }
template<typename w>
explicit cc_forceinline operator w() const { return to<w>(); }
auto operator->() const noexcept
{
return detail::dereference_wrapper<t>{get()};
}
cc_forceinline t operator()() const noexcept { return get(); }
cc_forceinline t operator*() const noexcept { return get(); }
template<typename w>
w to() const noexcept
{
return static_cast<w>(get());
}
};
// some linker problems
#if !defined OTR_INST_VALUE
# define OTR_INST_VALUE OTR_TEMPLATE_IMPORT
#endif
OTR_INST_VALUE(value<double>)
OTR_INST_VALUE(value<float>)
OTR_INST_VALUE(value<int>)
OTR_INST_VALUE(value<bool>)
OTR_INST_VALUE(value<QString>)
OTR_INST_VALUE(value<slider_value>)
OTR_INST_VALUE(value<QPointF>)
OTR_INST_VALUE(value<QVariant>)
OTR_INST_VALUE(value<QList<double>>)
OTR_INST_VALUE(value<QList<float>>)
OTR_INST_VALUE(value<QList<int>>)
OTR_INST_VALUE(value<QList<bool>>)
OTR_INST_VALUE(value<QList<QString>>)
OTR_INST_VALUE(value<QList<slider_value>>)
OTR_INST_VALUE(value<QList<QPointF>>)
OTR_INST_VALUE(value<QList<QVariant>>)
} // ns options
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