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#ifndef COMPONENTS_LUAUI_CONTENT
#define COMPONENTS_LUAUI_CONTENT
#include <map>
#include <string>
#include <sol/sol.hpp>
#include <components/lua/luastate.hpp>
namespace LuaUi
{
sol::protected_function loadContentConstructor(LuaUtil::LuaState* state);
bool isValidContent(const sol::object& object);
class ContentView
{
public:
// accepts only Lua tables returned by ui.content
explicit ContentView(sol::main_table table)
: mTable(std::move(table))
{
if (!isValidContent(mTable))
throw std::domain_error("Invalid UI Content");
}
size_t size() const { return mTable.size(); }
void assign(std::string_view name, const sol::table& table)
{
if (indexOf(name).has_value())
mTable[name] = table;
else
throw std::domain_error("Invalid Content key");
}
void assign(size_t index, const sol::table& table)
{
if (index <= size())
mTable[toLua(index)] = table;
else
throw std::range_error("Invalid Content index");
}
void insert(size_t index, const sol::table& table) { callMethod("insert", toLua(index), table); }
sol::object at(size_t index) const
{
if (index < size())
return mTable.get<sol::object>(toLua(index));
else
throw std::range_error("Invalid Content index");
}
sol::object at(std::string_view name) const
{
if (indexOf(name).has_value())
return mTable.get<sol::object>(name);
else
throw std::range_error("Invalid Content key");
}
void remove(size_t index)
{
if (index < size())
// for some reason mTable[key] = value doesn't call __newindex
getMetatable()[sol::meta_function::new_index].get<sol::protected_function>()(
mTable, toLua(index), sol::nil);
else
throw std::range_error("Invalid Content index");
}
void remove(std::string_view name)
{
auto index = indexOf(name);
if (index.has_value())
remove(index.value());
else
throw std::domain_error("Invalid Content key");
}
std::optional<size_t> indexOf(std::string_view name) const
{
sol::object result = callMethod("indexOf", name);
if (result.is<size_t>())
return fromLua(LuaUtil::cast<size_t>(result));
else
return std::nullopt;
}
std::optional<size_t> indexOf(const sol::table& table) const
{
sol::object result = callMethod("indexOf", table);
if (result.is<size_t>())
return fromLua(LuaUtil::cast<size_t>(result));
else
return std::nullopt;
}
sol::table getMetatable() const { return mTable[sol::metatable_key].get<sol::table>(); }
private:
sol::main_table mTable;
template <typename... Arg>
sol::object callMethod(std::string_view name, Arg&&... arg) const
{
return mTable.get<sol::protected_function>(name)(mTable, arg...);
}
static inline size_t toLua(size_t index) { return index + 1; }
static inline size_t fromLua(size_t index) { return index - 1; }
};
}
#endif // COMPONENTS_LUAUI_CONTENT
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