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