Method Validate

src/auto4_lua.cpp:756–794

	}

	bool LuaCommand::Validate(const agi::Context *c)
	{
		if (!(cmd_type & cmd::COMMAND_VALIDATE)) return true;

		set_context(L, c);

		// Error handler goes under the function to call
		lua_pushcclosure(L, add_stack_trace, 0);

		GetFeatureFunction("validate");
		auto subsobj = new LuaAssFile(L, c->ass.get());

		push_value(L, selected_rows(c));
		if (auto active_line = c->selectionController->GetActiveLine())
			push_value(L, active_line->Row + c->ass->Info.size() + c->ass->Styles.size() + 1);
		else
			lua_pushnil(L);

		int err = lua_pcall(L, 3, 2, -5 /* three args, function, error handler */);
		subsobj->ProcessingComplete();

		if (err) {
			wxLogWarning("Runtime error in Lua macro validation function:\n%s", get_wxstring(L, -1));
			lua_pop(L, 2);
			return false;
		}

		bool result = !!lua_toboolean(L, -2);

		wxString new_help_string(get_wxstring(L, -1));
		if (new_help_string.size()) {
			help = new_help_string;
			cmd_type |= cmd::COMMAND_DYNAMIC_HELP;
		}

		lua_pop(L, 3); // two return values and error handler

		return result;
	}

	void LuaCommand::operator()(agi::Context *c)
	{