Aegisub/aegisub/libaegisub/common/option_visit.cpp
Thomas Goyne 07da6f6f1b Split json::Number into json::Double and json::Integer
Trying to decide whether an option should be an int or double after
discarding the differences between "1.0" and "1" simply isn't possible,
and even if an option was initialized correctly, if it was changed to a
round number it could get written as an int and break later.

Also convert cajun to tabs because three spaces to indent is terrible.

Originally committed to SVN as r6018.
2011-12-22 21:12:25 +00:00

205 lines
5.7 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.
//
// $Id$
/// @file option_visit.cpp
/// @brief Cajun JSON visitor to load config values.
/// @see option_visit.h
/// @ingroup libaegisub
#include "option_visit.h"
#ifndef LAGI_PRE
#include <cassert>
#include <cmath>
#include <memory>
#endif
#include <libaegisub/colour.h>
#include <libaegisub/log.h>
#include <libaegisub/option_value.h>
namespace agi {
ConfigVisitor::ConfigVisitor(OptionValueMap &val, const std::string &member_name, bool ignore_errors)
: values(val)
, name(member_name)
, ignore_errors(ignore_errors)
{
}
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) {
json::Object::const_iterator index(object.begin()), index_end(object.end());
if (!name.empty())
name += "/";
for (; index != index_end; ++index) {
ConfigVisitor config_visitor(values, name + index->first, ignore_errors);
index->second.Accept(config_visitor);
}
}
template<class OptionValueType, class ValueType>
OptionValue *ConfigVisitor::ReadArray(json::Array const& src, std::string const& array_type, void (OptionValueType::*set_list)(const std::vector<ValueType>&)) {
std::vector<ValueType> arr;
arr.reserve(src.size());
for (json::Array::const_iterator it = src.begin(); it != src.end(); ++it) {
json::Object const& obj = *it;
if (obj.size() != 1) {
Error<OptionJsonValueArray>("Invalid array member");
return 0;
}
if (obj.begin()->first != array_type) {
Error<OptionJsonValueArray>("Attempt to insert value into array of wrong type");
return 0;
}
arr.push_back(obj.begin()->second);
}
OptionValueType *ret = new OptionValueType(name);
(ret->*set_list)(arr);
return ret;
}
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(array, array_type, &OptionValueListString::SetListString));
else if (array_type == "int")
AddOptionValue(ReadArray(array, array_type, &OptionValueListInt::SetListInt));
else if (array_type == "double")
AddOptionValue(ReadArray(array, array_type, &OptionValueListDouble::SetListDouble));
else if (array_type == "bool")
AddOptionValue(ReadArray(array, array_type, &OptionValueListBool::SetListBool));
else if (array_type == "colour")
AddOptionValue(ReadArray(array, array_type, &OptionValueListColour::SetListColour));
else
Error<OptionJsonValueArray>("Array type not handled");
}
void ConfigVisitor::Visit(const json::Integer& number) {
AddOptionValue(new OptionValueInt(name, number));
}
void ConfigVisitor::Visit(const json::Double& number) {
AddOptionValue(new OptionValueDouble(name, number));
}
void ConfigVisitor::Visit(const json::String& string) {
if (string.find("rgb(") == 0) {
AddOptionValue(new OptionValueColour(name, string));
} else {
AddOptionValue(new OptionValueString(name, string));
}
}
void ConfigVisitor::Visit(const json::Boolean& boolean) {
AddOptionValue(new OptionValueBool(name, boolean));
}
void ConfigVisitor::Visit(const json::Null& null) {
Error<OptionJsonValueNull>("Attempt to read null value");
}
void ConfigVisitor::AddOptionValue(OptionValue* opt) {
if (!opt) {
assert(ignore_errors);
return;
}
if (!values.count(name)) {
values[name] = opt;
return;
}
// Ensure than opt is deleted at the end of this function even if the Set
// method throws
std::auto_ptr<OptionValue> auto_opt(opt);
try {
switch (opt->GetType()) {
case OptionValue::Type_String:
values[name]->SetString(opt->GetString());
break;
case OptionValue::Type_Int:
values[name]->SetInt(opt->GetInt());
break;
case OptionValue::Type_Double:
values[name]->SetDouble(opt->GetDouble());
break;
case OptionValue::Type_Colour:
values[name]->SetColour(opt->GetColour());
break;
case OptionValue::Type_Bool:
values[name]->SetBool(opt->GetBool());
break;
case OptionValue::Type_List_String:
values[name]->SetListString(opt->GetListString());
break;
case OptionValue::Type_List_Int:
values[name]->SetListInt(opt->GetListInt());
break;
case OptionValue::Type_List_Double:
values[name]->SetListDouble(opt->GetListDouble());
break;
case OptionValue::Type_List_Colour:
values[name]->SetListColour(opt->GetListColour());
break;
case OptionValue::Type_List_Bool:
values[name]->SetListBool(opt->GetListBool());
break;
}
}
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