134 lines
3.8 KiB
C++
134 lines
3.8 KiB
C++
#ifndef register_manager_hh_INCLUDED
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#define register_manager_hh_INCLUDED
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#include "array_view.hh"
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#include "completion.hh"
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#include "exception.hh"
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#include "utils.hh"
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#include "hash_map.hh"
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#include "string.hh"
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#include "vector.hh"
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namespace Kakoune
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{
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class Context;
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class Register
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{
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public:
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virtual ~Register() = default;
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virtual void set(Context& context, ConstArrayView<String> values, bool restoring = false) = 0;
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virtual ConstArrayView<String> get(const Context& context) = 0;
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virtual const String& get_main(const Context& context, size_t main_index) = 0;
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using RestoreInfo = Vector<String, MemoryDomain::Registers>;
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RestoreInfo save(const Context& context) { return get(context) | gather<RestoreInfo>(); }
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void restore(Context& context, const RestoreInfo& info) { set(context, info, true); }
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NestedBool& modified_hook_disabled() { return m_disable_modified_hook; }
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protected:
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NestedBool m_disable_modified_hook;
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};
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// static value register, which can be modified
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// using operator=, so should be user modifiable
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class StaticRegister : public Register
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{
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public:
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StaticRegister(String name) : m_name{std::move(name)} {}
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void set(Context& context, ConstArrayView<String> values, bool) override;
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ConstArrayView<String> get(const Context&) override;
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const String& get_main(const Context& context, size_t main_index) override;
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protected:
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String m_name;
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Vector<String, MemoryDomain::Registers> m_content;
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};
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// Dynamic value register, use it's RegisterRetriever
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// to get it's value when needed.
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template<typename Getter, typename Setter>
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class DynamicRegister : public StaticRegister
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{
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public:
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DynamicRegister(String name, Getter getter, Setter setter)
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: StaticRegister(std::move(name)), m_getter(std::move(getter)), m_setter(std::move(setter)) {}
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void set(Context& context, ConstArrayView<String> values, bool) override
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{
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m_setter(context, values);
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}
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ConstArrayView<String> get(const Context& context) override
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{
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m_content = m_getter(context);
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return StaticRegister::get(context);
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}
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private:
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Getter m_getter;
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Setter m_setter;
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};
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// Register that is used to store some kind prompt history
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class HistoryRegister : public StaticRegister
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{
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public:
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using StaticRegister::StaticRegister;
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void set(Context& context, ConstArrayView<String> values, bool restoring) override;
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const String& get_main(const Context&, size_t) override;
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};
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template<typename Func>
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std::unique_ptr<Register> make_dyn_reg(String name, Func func)
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{
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auto setter = [](Context&, ConstArrayView<String>)
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{
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throw runtime_error("this register is not assignable");
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};
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return std::make_unique<DynamicRegister<Func, decltype(setter)>>(name, std::move(func), setter);
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}
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template<typename Getter, typename Setter>
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std::unique_ptr<Register> make_dyn_reg(String name, Getter getter, Setter setter)
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{
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return std::make_unique<DynamicRegister<Getter, Setter>>(name, std::move(getter), std::move(setter));
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}
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class NullRegister : public Register
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{
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public:
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void set(Context&, ConstArrayView<String>, bool) override {}
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ConstArrayView<String> get(const Context&) override
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{
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return ConstArrayView<String>(String::ms_empty);
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}
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const String& get_main(const Context&, size_t) override
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{
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return String::ms_empty;
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}
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};
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class RegisterManager : public Singleton<RegisterManager>
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{
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public:
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Register& operator[](StringView reg) const;
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Register& operator[](Codepoint c) const;
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void add_register(Codepoint c, std::unique_ptr<Register> reg);
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CandidateList complete_register_name(StringView prefix, ByteCount cursor_pos) const;
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protected:
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HashMap<Codepoint, std::unique_ptr<Register>, MemoryDomain::Registers> m_registers;
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};
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}
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#endif // register_manager_hh_INCLUDED
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