77 lines
2.0 KiB
C++
77 lines
2.0 KiB
C++
#ifndef function_group_hh_INCLUDED
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#define function_group_hh_INCLUDED
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#include "exception.hh"
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#include "id_map.hh"
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#include "string.hh"
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namespace Kakoune
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{
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struct group_not_found : public runtime_error
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{
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using runtime_error::runtime_error;
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};
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template<typename... Args>
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class FunctionGroup
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{
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public:
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using Function = std::function<void (Args...)>;
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using FunctionAndId = std::pair<String, std::function<void (Args...)>>;
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void operator()(Args... args)
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{
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for (auto& func : m_functions)
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func.second(std::forward<Args>(args)...);
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}
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void append(FunctionAndId&& function)
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{
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if (m_functions.contains(function.first))
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throw runtime_error("duplicate id: " + function.first);
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m_functions.append(std::forward<FunctionAndId>(function));
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}
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void remove(StringView id)
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{
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m_functions.remove(id);
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}
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FunctionGroup& get_group(StringView path, Codepoint path_separator = 0)
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{
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auto sep_it = std::find(path.begin(), path.end(), path_separator);
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StringView id(path.begin(), sep_it);
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auto it = m_functions.find(id);
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if (it == m_functions.end())
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throw group_not_found("no such id: "_str + id);
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FunctionGroup* group = it->second.template target<FunctionGroup>();
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if (not group)
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throw group_not_found("not a group: "_str + id);
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if (sep_it != path.end())
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return group->get_group(StringView(sep_it+1, path.end()), path_separator);
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else
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return *group;
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}
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CandidateList complete_id(StringView prefix, ByteCount cursor_pos) const
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{
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return m_functions.complete_id(prefix, cursor_pos);
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}
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CandidateList complete_group_id(StringView prefix, ByteCount cursor_pos) const
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{
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return m_functions.complete_id_if(
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prefix, cursor_pos, [](const FunctionAndId& func) {
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return func.second.template target<FunctionGroup>() != nullptr;
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});
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}
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private:
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id_map<Function> m_functions;
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};
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}
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#endif // function_group_hh_INCLUDED
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