Aegisub/libaegisub/common/option_visit.cpp
2014-05-23 07:28:24 -07:00

159 lines
4.8 KiB
C++

// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
/// @file option_visit.cpp
/// @brief Cajun JSON visitor to load config values.
/// @see option_visit.h
/// @ingroup libaegisub
#include "option_visit.h"
#include <cassert>
#include <libaegisub/log.h>
#include <libaegisub/option_value.h>
#include <libaegisub/make_unique.h>
#include <boost/algorithm/string/predicate.hpp>
namespace agi {
ConfigVisitor::ConfigVisitor(OptionValueMap &val, const std::string &member_name, bool ignore_errors, bool replace)
: values(val)
, name(member_name)
, ignore_errors(ignore_errors)
, replace(replace)
{
}
template<class ErrorType>
void ConfigVisitor::Error(const char *message) {
if (ignore_errors)
LOG_E("option/load/config_visitor") << "Error loading option from user configuration: " << message;
else
throw ErrorType(message);
}
void ConfigVisitor::Visit(const json::Object& object) {
if (!name.empty())
name += "/";
for (auto const& obj : object) {
ConfigVisitor config_visitor(values, name + obj.first, ignore_errors, replace);
obj.second.Accept(config_visitor);
}
}
template<class OptionValueType>
std::unique_ptr<OptionValue> ConfigVisitor::ReadArray(json::Array const& src, std::string const& array_type) {
typename OptionValueType::value_type arr;
arr.reserve(src.size());
for (json::Object const& obj : src) {
if (obj.size() != 1) {
Error<OptionJsonValueArray>("Invalid array member");
return nullptr;
}
if (obj.begin()->first != array_type) {
Error<OptionJsonValueArray>("Attempt to insert value into array of wrong type");
return nullptr;
}
arr.push_back((typename OptionValueType::value_type::value_type)(obj.begin()->second));
}
return agi::make_unique<OptionValueType>(name, std::move(arr));
}
void ConfigVisitor::Visit(const json::Array& array) {
if (array.empty()) {
Error<OptionJsonValueArray>("Cannot infer the type of an empty array");
return;
}
json::Object const& front = array.front();
if (front.size() != 1) {
Error<OptionJsonValueArray>("Invalid array member");
return;
}
const std::string& array_type = front.begin()->first;
if (array_type == "string")
AddOptionValue(ReadArray<OptionValueListString>(array, array_type));
else if (array_type == "int")
AddOptionValue(ReadArray<OptionValueListInt>(array, array_type));
else if (array_type == "double")
AddOptionValue(ReadArray<OptionValueListDouble>(array, array_type));
else if (array_type == "bool")
AddOptionValue(ReadArray<OptionValueListBool>(array, array_type));
else if (array_type == "color")
AddOptionValue(ReadArray<OptionValueListColor>(array, array_type));
else
Error<OptionJsonValueArray>("Array type not handled");
}
void ConfigVisitor::Visit(const json::Integer& number) {
AddOptionValue(agi::make_unique<OptionValueInt>(name, number));
}
void ConfigVisitor::Visit(const json::Double& number) {
AddOptionValue(agi::make_unique<OptionValueDouble>(name, number));
}
void ConfigVisitor::Visit(const json::String& string) {
size_t size = string.size();
if ((size == 4 && string[0] == '#') ||
(size == 7 && string[0] == '#') ||
(size >= 10 && boost::starts_with(string, "rgb(")) ||
((size == 9 || size == 10) && boost::starts_with(string, "&H")))
{
AddOptionValue(agi::make_unique<OptionValueColor>(name, string));
} else {
AddOptionValue(agi::make_unique<OptionValueString>(name, string));
}
}
void ConfigVisitor::Visit(const json::Boolean& boolean) {
AddOptionValue(agi::make_unique<OptionValueBool>(name, boolean));
}
void ConfigVisitor::Visit(const json::Null& null) {
Error<OptionJsonValueNull>("Attempt to read null value");
}
void ConfigVisitor::AddOptionValue(std::unique_ptr<OptionValue>&& opt) {
if (!opt) {
assert(ignore_errors);
return;
}
auto it = values.find(name);
if (it == values.end())
values[name] = std::move(opt);
else if (replace)
it->second = std::move(opt);
else {
try {
values[name]->Set(opt.get());
}
catch (agi::OptionValueError const& e) {
if (ignore_errors)
LOG_E("option/load/config_visitor") << "Error loading option from user configuration: " << e.GetChainedMessage();
else
throw;
}
}
}
} // namespace agi