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#include "register_manager.hh"
#include "assert.hh"
#include "exception.hh"
#include "id_map.hh"
namespace Kakoune
{
// static value register, which can be modified
// using operator=, so should be user modifiable
class StaticRegister : public Register
{
public:
Register& operator=(ConstArrayView<String> values) override
{
m_content = Vector<String, MemoryDomain::Registers>(values.begin(), values.end());
return *this;
}
ConstArrayView<String> values(const Context&) override
{
if (m_content.empty())
return ConstArrayView<String>(ms_empty);
else
return ConstArrayView<String>(m_content);
}
protected:
Vector<String, MemoryDomain::Registers> m_content;
static const String ms_empty;
};
const String StaticRegister::ms_empty;
// Dynamic value register, use it's RegisterRetriever
// to get it's value when needed.
class DynamicRegister : public StaticRegister
{
public:
DynamicRegister(RegisterRetriever function)
: m_function(std::move(function)) {}
Register& operator=(ConstArrayView<String> values) override
{
throw runtime_error("this register is not assignable");
}
ConstArrayView<String> values(const Context& context) override
{
m_content = m_function(context);
return StaticRegister::values(context);
}
private:
RegisterRetriever m_function;
};
Register& RegisterManager::operator[](StringView reg)
{
if (reg.length() == 1)
return (*this)[reg[0_byte]];
static const IdMap<Codepoint> reg_names = {
{ "slash", '/' },
{ "dquote", '"' },
{ "pipe", '|' },
{ "caret", '^' },
{ "arobase", '@' }
};
auto it = reg_names.find(reg);
if (it == reg_names.end())
throw runtime_error(format("no such register: '{}'", reg));
return (*this)[it->value];
}
Register& RegisterManager::operator[](Codepoint c)
{
c = tolower(c);
if (c < 32 or c > 127)
throw runtime_error(format("invalid register name: '{}'", c));
auto& reg_ptr = m_registers[c];
if (not reg_ptr)
reg_ptr.reset(new StaticRegister());
return *reg_ptr;
}
void RegisterManager::register_dynamic_register(char reg, RegisterRetriever function)
{
auto& reg_ptr = m_registers[reg];
kak_assert(not reg_ptr);
reg_ptr.reset(new DynamicRegister(std::move(function)));
}
}
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