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#ifndef register_manager_hh_INCLUDED
#define register_manager_hh_INCLUDED
#include "array_view.hh"
#include "exception.hh"
#include "utils.hh"
#include "hash_map.hh"
#include "string.hh"
#include "vector.hh"
namespace Kakoune
{
class Context;
class Register
{
public:
virtual ~Register() = default;
virtual void set(Context& context, ConstArrayView<String> values) = 0;
virtual ConstArrayView<String> get(const Context& context) = 0;
};
// static value register, which can be modified
// using operator=, so should be user modifiable
class StaticRegister : public Register
{
public:
void set(Context&, ConstArrayView<String> values) override
{
m_content.assign(values.begin(), values.end());
}
ConstArrayView<String> get(const Context&) override
{
if (m_content.empty())
return ConstArrayView<String>(String::ms_empty);
else
return ConstArrayView<String>(m_content);
}
protected:
Vector<String, MemoryDomain::Registers> m_content;
};
// Dynamic value register, use it's RegisterRetriever
// to get it's value when needed.
template<typename Getter, typename Setter>
class DynamicRegister : public StaticRegister
{
public:
DynamicRegister(Getter getter, Setter setter)
: m_getter(std::move(getter)), m_setter(std::move(setter)) {}
void set(Context& context, ConstArrayView<String> values) override
{
m_setter(context, values);
}
ConstArrayView<String> get(const Context& context) override
{
m_content = m_getter(context);
return StaticRegister::get(context);
}
private:
Getter m_getter;
Setter m_setter;
};
template<typename Func>
std::unique_ptr<Register> make_dyn_reg(Func func)
{
auto setter = [](Context&, ConstArrayView<String>)
{
throw runtime_error("this register is not assignable");
};
return std::make_unique<DynamicRegister<Func, decltype(setter)>>(std::move(func), setter);
}
template<typename Getter, typename Setter>
std::unique_ptr<Register> make_dyn_reg(Getter getter, Setter setter)
{
return std::make_unique<DynamicRegister<Getter, Setter>>(std::move(getter), std::move(setter));
}
class NullRegister : public Register
{
public:
void set(Context&, ConstArrayView<String>) override {}
ConstArrayView<String> get(const Context&) override
{
return ConstArrayView<String>(String::ms_empty);
}
};
class RegisterManager : public Singleton<RegisterManager>
{
public:
Register& operator[](StringView reg) const;
Register& operator[](Codepoint c) const;
void add_register(Codepoint c, std::unique_ptr<Register> reg);
protected:
HashMap<Codepoint, std::unique_ptr<Register>, MemoryDomain::Registers> m_registers;
};
}
#endif // register_manager_hh_INCLUDED
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