MyGUI_ResourceManager.cpp

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/*
 * This source file is part of MyGUI. For the latest info, see http://mygui.info/
 * Distributed under the MIT License
 * (See accompanying file COPYING.MIT or copy at http://opensource.org/licenses/MIT)
 */
 
#include "MyGUI_Precompiled.h"
#include "MyGUI_ResourceManager.h"
#include "MyGUI_XmlDocument.h"
#include "MyGUI_IResource.h"
#include "MyGUI_DataManager.h"
#include "MyGUI_FactoryManager.h"
#include "MyGUI_DataStreamHolder.h"
#include "MyGUI_ResourceImageSet.h"
 
namespace MyGUI
{
 
    MYGUI_SINGLETON_DEFINITION(ResourceManager);
 
    ResourceManager::ResourceManager() :
        mCategoryName("Resource"),
        mXmlListTagName("List"),
        mSingletonHolder(this)
    {
    }
 
    void ResourceManager::initialise()
    {
        MYGUI_ASSERT(!mIsInitialise, getClassTypeName() << " initialised twice");
        MYGUI_LOG(Info, "* Initialise: " << getClassTypeName());
 
        registerLoadXmlDelegate(mCategoryName) = newDelegate(this, &ResourceManager::loadFromXmlNode);
        registerLoadXmlDelegate(mXmlListTagName) = newDelegate(this, &ResourceManager::_loadList);
 
        // регестрируем дефолтные ресурсы
        FactoryManager::getInstance().registerFactory<ResourceImageSet>(mCategoryName);
 
        MYGUI_LOG(Info, getClassTypeName() << " successfully initialized");
        mIsInitialise = true;
    }
 
    void ResourceManager::shutdown()
    {
        MYGUI_ASSERT(mIsInitialise, getClassTypeName() << " is not initialised");
        MYGUI_LOG(Info, "* Shutdown: " << getClassTypeName());
 
        FactoryManager::getInstance().unregisterFactory<ResourceImageSet>(mCategoryName);
 
        clear();
        unregisterLoadXmlDelegate(mCategoryName);
        unregisterLoadXmlDelegate(mXmlListTagName);
 
        mMapLoadXmlDelegate.clear();
 
        MYGUI_LOG(Info, getClassTypeName() << " successfully shutdown");
        mIsInitialise = false;
    }
 
    bool ResourceManager::load(const std::string& _file)
    {
        return _loadImplement(_file, false, {}, getClassTypeName());
    }
 
    void ResourceManager::loadFromXmlNode(xml::ElementPtr _node, std::string_view /*unused*/, Version _version)
    {
        FactoryManager& factory = FactoryManager::getInstance();
 
        // берем детей и крутимся, основной цикл
        xml::ElementEnumerator root = _node->getElementEnumerator();
        while (root.next(mCategoryName))
        {
            // парсим атрибуты
            std::string type;
            std::string name;
            root->findAttribute("type", type);
            root->findAttribute("name", name);
 
            if (name.empty())
                continue;
 
            IObject* object = factory.createObject(mCategoryName, type);
            if (object == nullptr)
            {
                MYGUI_LOG(Error, "resource type '" << type << "' not found");
                continue;
            }
 
            MapResource::iterator item = mResources.find(name);
            if (item != mResources.end())
            {
                MYGUI_LOG(Warning, "duplicate resource name '" << name << "'");
 
                // ресурсами могут пользоваться
                mRemovedResources.push_back((*item).second);
                mResources.erase(item);
            }
 
            IResourcePtr resource = object->castType<IResource>();
            resource->deserialization(root.current(), _version);
 
            mResources[name] = resource;
        }
    }
 
    void ResourceManager::_loadList(xml::ElementPtr _node, std::string_view /*unused*/, Version _version)
    {
        // берем детей и крутимся, основной цикл
        xml::ElementEnumerator node = _node->getElementEnumerator();
        while (node.next(mXmlListTagName))
        {
            std::string source;
            if (!node->findAttribute("file", source))
                continue;
            MYGUI_LOG(Info, "Load ini file '" << source << "'");
            _loadImplement(source, false, {}, getClassTypeName());
        }
    }
 
    ResourceManager::LoadXmlDelegate& ResourceManager::registerLoadXmlDelegate(std::string_view _key)
    {
        MapLoadXmlDelegate::iterator iter = mMapLoadXmlDelegate.find(_key);
        MYGUI_ASSERT(iter == mMapLoadXmlDelegate.end(), "name delegate is exist");
        return mMapLoadXmlDelegate.emplace(_key, LoadXmlDelegate()).first->second;
    }
 
    void ResourceManager::unregisterLoadXmlDelegate(std::string_view _key)
    {
        MapLoadXmlDelegate::iterator iter = mMapLoadXmlDelegate.find(_key);
        if (iter != mMapLoadXmlDelegate.end())
            mMapLoadXmlDelegate.erase(iter);
    }
 
    bool ResourceManager::_loadImplement(
        const std::string& _file,
        bool _match,
        std::string_view _type,
        std::string_view _instance)
    {
        DataStreamHolder data = DataManager::getInstance().getData(_file);
        if (data.getData() == nullptr)
        {
            MYGUI_LOG(Error, _instance << " : '" << _file << "', not found");
            return false;
        }
 
        xml::Document doc;
        if (!doc.open(data.getData()))
        {
            MYGUI_LOG(Error, _instance << " : '" << _file << "', " << doc.getLastError());
            return false;
        }
 
        xml::ElementPtr root = doc.getRoot();
        if ((nullptr == root) || (root->getName() != "MyGUI"))
        {
            MYGUI_LOG(Error, _instance << " : '" << _file << "', tag 'MyGUI' not found");
            return false;
        }
 
        std::string type;
        if (root->findAttribute("type", type))
        {
            Version version = Version::parse(root->findAttribute("version"));
            MapLoadXmlDelegate::iterator iter = mMapLoadXmlDelegate.find(type);
            if (iter != mMapLoadXmlDelegate.end())
            {
                if ((!_match) || (type == _type))
                    (*iter).second(root, _file, version);
                else
                {
                    MYGUI_LOG(Error, _instance << " : '" << _file << "', type '" << _type << "' not found");
                    return false;
                }
            }
            else
            {
                MYGUI_LOG(Error, _instance << " : '" << _file << "', delegate for type '" << type << "'not found");
                return false;
            }
        }
        // предпологаем что будут вложенные
        else if (!_match)
        {
            xml::ElementEnumerator node = root->getElementEnumerator();
            while (node.next("MyGUI"))
            {
                if (node->findAttribute("type", type))
                {
                    Version version = Version::parse(root->findAttribute("version"));
                    MapLoadXmlDelegate::iterator iter = mMapLoadXmlDelegate.find(type);
                    if (iter != mMapLoadXmlDelegate.end())
                    {
                        (*iter).second(node.current(), _file, version);
                    }
                    else
                    {
                        MYGUI_LOG(
                            Error,
                            _instance << " : '" << _file << "', delegate for type '" << type << "'not found");
                    }
                }
                else
                {
                    MYGUI_LOG(Error, _instance << " : '" << _file << "', tag 'type' not found");
                }
            }
        }
 
        return true;
    }
 
    void ResourceManager::addResource(IResourcePtr _item)
    {
        if (!_item->getResourceName().empty())
            mResources[_item->getResourceName()] = _item;
    }
 
    void ResourceManager::removeResource(IResourcePtr _item)
    {
        if (_item == nullptr)
            return;
 
        if (!_item->getResourceName().empty())
        {
            MapResource::iterator item = mResources.find(_item->getResourceName());
            if (item != mResources.end())
                mResources.erase(item);
        }
    }
 
    bool ResourceManager::isExist(std::string_view _name) const
    {
        return mResources.find(_name) != mResources.end();
    }
 
    IResource* ResourceManager::findByName(std::string_view _name) const
    {
        MapResource::const_iterator item = mResources.find(_name);
        return (item == mResources.end()) ? nullptr : item->second;
    }
 
    IResource* ResourceManager::getByName(std::string_view _name, bool _throw) const
    {
        IResource* result = findByName(_name);
        MYGUI_ASSERT(result || !_throw, "Resource '" << _name << "' not found");
        return result;
    }
 
    bool ResourceManager::removeByName(std::string_view _name)
    {
        MapResource::const_iterator item = mResources.find(_name);
        if (item != mResources.end())
        {
            delete item->second;
            mResources.erase(item->first);
            return true;
        }
        return false;
    }
 
    void ResourceManager::clear()
    {
        for (auto& resource : mResources)
            delete resource.second;
        mResources.clear();
 
        for (auto& removedResource : mRemovedResources)
            delete removedResource;
        mRemovedResources.clear();
    }
 
    ResourceManager::EnumeratorPtr ResourceManager::getEnumerator() const
    {
        return EnumeratorPtr(mResources);
    }
 
    size_t ResourceManager::getCount() const
    {
        return mResources.size();
    }
 
    const std::string& ResourceManager::getCategoryName() const
    {
        return mCategoryName;
    }
 
} // namespace MyGUI