102 lines
2.4 KiB
C++
102 lines
2.4 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 "exception.hh"
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#include "utils.hh"
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#include "unordered_map.hh"
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#include "string.hh"
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#include "vector.hh"
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#include <functional>
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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() {}
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virtual Register& operator=(ConstArrayView<String> values) = 0;
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virtual ConstArrayView<String> values(const Context& context) = 0;
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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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Register& operator=(ConstArrayView<String> values) override
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{
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m_content = Vector<String, MemoryDomain::Registers>(values.begin(), values.end());
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return *this;
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}
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ConstArrayView<String> values(const Context&) override
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{
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if (m_content.empty())
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return ConstArrayView<String>(String::ms_empty);
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else
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return ConstArrayView<String>(m_content);
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}
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protected:
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Vector<String, MemoryDomain::Registers> m_content;
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};
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using RegisterRetriever = std::function<Vector<String, MemoryDomain::Registers> (const Context&)>;
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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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class DynamicRegister : public StaticRegister
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{
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public:
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DynamicRegister(RegisterRetriever function)
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: m_function(std::move(function)) {}
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Register& operator=(ConstArrayView<String> values) override
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{
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throw runtime_error("this register is not assignable");
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}
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ConstArrayView<String> values(const Context& context) override
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{
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m_content = m_function(context);
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return StaticRegister::values(context);
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}
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private:
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RegisterRetriever m_function;
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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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Register& operator=(ConstArrayView<String> values) override
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{
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return *this;
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}
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ConstArrayView<String> values(const Context& context) override
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{
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return ConstArrayView<String>(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(char c, std::unique_ptr<Register> reg);
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protected:
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UnorderedMap<char, 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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