Aegisub/libaegisub/common/option.cpp

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// 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.cpp
/// @brief Option interface.
/// @ingroup libaegisub
#include "../config.h"
#include "libaegisub/option.h"
#include "libaegisub/cajun/reader.h"
#include "libaegisub/cajun/writer.h"
#include "libaegisub/cajun/elements.h"
#include "libaegisub/fs.h"
#include "libaegisub/io.h"
#include "libaegisub/log.h"
#include "libaegisub/option_value.h"
#include "option_visit.h"
#include <boost/interprocess/streams/bufferstream.hpp>
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#include <boost/range/adaptor/map.hpp>
#include <cassert>
#include <memory>
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namespace {
/// @brief Write an option to a json object
/// @param[out] obj Parent object
/// @param[in] path Path option should be stored in.
/// @param[in] value Value to write.
void put_option(json::Object &obj, const std::string &path, const json::UnknownElement &value) {
std::string::size_type pos = path.find('/');
// Not having a '/' denotes it is a leaf.
if (pos == std::string::npos) {
assert(obj.find(path) == obj.end());
obj[path] = value;
}
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else
put_option(obj[path.substr(0, pos)], path.substr(pos + 1), value);
}
template<class T>
void put_array(json::Object &obj, const std::string &path, const char *element_key, std::vector<T> const& value) {
json::Array array;
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for (T const& elem : value) {
array.push_back(json::Object());
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static_cast<json::Object&>(array.back())[element_key] = (json::UnknownElement)elem;
}
put_option(obj, path, array);
}
}
namespace agi {
Options::Options(agi::fs::path const& file, std::pair<const char *, size_t> default_config, const OptionSetting setting)
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: config_file(file)
, setting(setting)
{
LOG_D("agi/options") << "New Options object";
boost::interprocess::ibufferstream stream(default_config.first, default_config.second);
LoadConfig(stream);
}
Options::~Options() {
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if ((setting & FLUSH_SKIP) != FLUSH_SKIP)
Flush();
}
void Options::ConfigNext(std::istream& stream) {
LoadConfig(stream);
}
void Options::ConfigUser() {
try {
std::unique_ptr<std::istream> stream(io::Open(config_file));
LoadConfig(*stream, true);
}
catch (fs::FileNotFound const&) {
return;
}
/// @todo Handle other errors such as parsing and notifying the user.
}
void Options::LoadConfig(std::istream& stream, bool ignore_errors) {
json::UnknownElement config_root;
try {
json::Reader::Read(config_root, stream);
} catch (json::Reader::ParseException& e) {
LOG_E("option/load") << "json::ParseException: " << e.what() << ", Line/offset: " << e.m_locTokenBegin.m_nLine + 1 << '/' << e.m_locTokenBegin.m_nLineOffset + 1;
} catch (json::Exception& e) {
/// @todo Do something better here, maybe print the exact error
LOG_E("option/load") << "json::Exception: " << e.what();
}
ConfigVisitor config_visitor(values, "", ignore_errors, !ignore_errors);
config_root.Accept(config_visitor);
}
OptionValue* Options::Get(const std::string &name) {
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auto index = values.find(name);
if (index != values.end())
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return index->second.get();
LOG_E("option/get") << "agi::Options::Get Option not found: (" << name << ")";
throw OptionErrorNotFound("Option value not found: " + name);
}
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void Options::Flush() const {
json::Object obj_out;
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for (auto const& ov : values) {
switch (ov.second->GetType()) {
case OptionValue::Type_String:
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put_option(obj_out, ov.first, ov.second->GetString());
break;
case OptionValue::Type_Int:
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put_option(obj_out, ov.first, ov.second->GetInt());
break;
case OptionValue::Type_Double:
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put_option(obj_out, ov.first, ov.second->GetDouble());
break;
case OptionValue::Type_Color:
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put_option(obj_out, ov.first, ov.second->GetColor().GetRgbFormatted());
break;
case OptionValue::Type_Bool:
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put_option(obj_out, ov.first, ov.second->GetBool());
break;
case OptionValue::Type_List_String:
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put_array(obj_out, ov.first, "string", ov.second->GetListString());
break;
case OptionValue::Type_List_Int:
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put_array(obj_out, ov.first, "int", ov.second->GetListInt());
break;
case OptionValue::Type_List_Double:
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put_array(obj_out, ov.first, "double", ov.second->GetListDouble());
break;
case OptionValue::Type_List_Color:
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put_array(obj_out, ov.first, "color", ov.second->GetListColor());
break;
case OptionValue::Type_List_Bool:
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put_array(obj_out, ov.first, "bool", ov.second->GetListBool());
break;
}
}
json::Writer::Write(obj_out, io::Save(config_file).Get());
}
} // namespace agi