File indexing completed on 2024-06-16 04:50:14

 /*
     SPDX-FileCopyrightText: 2008 Tobias Koenig <tokoe@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #pragma once
 
 #include <QDateTime>
 
 #include "itemchangelog_p.h"
 #include "itempayloadinternals_p.h"
 #include "tag.h"
 
 #include <algorithm>
 #include <cassert>
 #include <memory>
 #include <vector>
 
 namespace Akonadi
 {
 namespace _detail
 {
 template<typename T>
 class clone_ptr
 {
     std::unique_ptr<T> t;
 
 public:
     explicit clone_ptr() = default;
     explicit clone_ptr(T *t)
         : t(t)
     {
     }
 
     clone_ptr(const clone_ptr &other)
         : t(other.t ? other.t->clone() : nullptr)
     {
     }
 
     clone_ptr(clone_ptr &&) noexcept = default;
 
     ~clone_ptr() = default;
 
     clone_ptr &operator=(const clone_ptr &other)
     {
         if (this != &other) {
             clone_ptr copy(other);
             swap(copy);
         }
         return *this;
     }
 
     clone_ptr &operator=(clone_ptr &&) noexcept = default;
 
     void swap(clone_ptr &other)
     {
         using std::swap;
         swap(t, other.t);
     }
 
     T *operator->() const
     {
         return get();
     }
 
     T &operator*() const
     {
         assert(get() != nullptr);
         return *get();
     }
 
     T *get() const
     {
         return t.get();
     }
 
     T *release()
     {
         return t.release();
     }
 
     void reset(T *other = nullptr)
     {
         t.reset(other);
     }
 
     explicit operator bool() const noexcept
     {
         return get() != nullptr;
     }
 };
 
 template<typename T>
 inline void swap(clone_ptr<T> &lhs, clone_ptr<T> &rhs) noexcept
 {
     lhs.swap(rhs);
 }
 
 struct TypedPayload {
     clone_ptr<Internal::PayloadBase> payload;
     int sharedPointerId;
     int metaTypeId;
 };
 
 struct BySharedPointerAndMetaTypeID {
     const int spid;
     const int mtid;
     BySharedPointerAndMetaTypeID(int spid, int mtid)
         : spid(spid)
         , mtid(mtid)
     {
     }
     bool operator()(const TypedPayload &tp) const
     {
         return (mtid == -1 || mtid == tp.metaTypeId) && (spid == -1 || spid == tp.sharedPointerId);
     }
 };
 
 }
 
 } // namespace Akonadi
 
 namespace std
 {
 template<>
 inline void swap<Akonadi::_detail::TypedPayload>(Akonadi::_detail::TypedPayload &lhs, Akonadi::_detail::TypedPayload &rhs) noexcept
 {
     lhs.payload.swap(rhs.payload);
     swap(lhs.sharedPointerId, rhs.sharedPointerId);
     swap(lhs.metaTypeId, rhs.metaTypeId);
 }
 }
 
 namespace Akonadi
 {
 using PayloadContainer = std::vector<_detail::TypedPayload>;
 }
 
 namespace Akonadi
 {
 /**
  * @internal
  */
 class ItemPrivate : public QSharedData
 {
 public:
     explicit ItemPrivate(Item::Id id = -1)
         : QSharedData()
         , mRevision(-1)
         , mId(id)
         , mPayloads()
         , mCollectionId(-1)
         , mSize(0)
         , mModificationTime()
         , mFlagsOverwritten(false)
         , mTagsOverwritten(false)
         , mSizeChanged(false)
         , mClearPayload(false)
         , mConversionInProgress(false)
     {
     }
 
     ItemPrivate(const ItemPrivate &other)
         : QSharedData(other)
         , mRevision(other.mRevision)
         , mId(other.mId)
         , mRemoteId(other.mRemoteId)
         , mRemoteRevision(other.mRemoteRevision)
         , mPayloadPath(other.mPayloadPath)
         , mPayloads(other.mPayloads)
         , mFlags(other.mFlags)
         , mTags(other.mTags)
         , mRelations(other.mRelations)
         , mCollectionId(other.mCollectionId)
         , mVirtualReferences(other.mVirtualReferences)
         , mSize(other.mSize)
         , mModificationTime(other.mModificationTime)
         , mMimeType(other.mMimeType)
         , mGid(other.mGid)
         , mCachedPayloadParts(other.mCachedPayloadParts)
         , mFlagsOverwritten(other.mFlagsOverwritten)
         , mTagsOverwritten(other.mTagsOverwritten)
         , mSizeChanged(other.mSizeChanged)
         , mClearPayload(other.mClearPayload)
         , mConversionInProgress(false)
     {
         if (other.mParent) {
             mParent.reset(new Collection(*(other.mParent)));
         }
 
         ItemChangeLog *changelog = ItemChangeLog::instance();
         changelog->addedFlags(this) = changelog->addedFlags(&other);
         changelog->deletedFlags(this) = changelog->deletedFlags(&other);
         changelog->addedTags(this) = changelog->addedTags(&other);
         changelog->deletedTags(this) = changelog->deletedTags(&other);
         changelog->attributeStorage(this) = changelog->attributeStorage(&other);
     }
 
     ~ItemPrivate()
     {
         ItemChangeLog::instance()->removeItem(this);
     }
 
     void resetChangeLog()
     {
         mFlagsOverwritten = false;
         mSizeChanged = false;
         mTagsOverwritten = false;
         ItemChangeLog::instance()->clearItemChangelog(this);
     }
 
     bool hasMetaTypeId(int mtid) const
     {
         return std::any_of(mPayloads.cbegin(), mPayloads.cend(), _detail::BySharedPointerAndMetaTypeID(-1, mtid));
     }
 
     Internal::PayloadBase *payloadBaseImpl(int spid, int mtid) const
     {
         auto it = std::find_if(mPayloads.cbegin(), mPayloads.cend(), _detail::BySharedPointerAndMetaTypeID(spid, mtid));
         return it == mPayloads.cend() ? nullptr : it->payload.get();
     }
 
     bool movePayloadFrom(ItemPrivate *other, int mtid) const /*sic!*/
     {
         assert(other);
         const size_t oldSize = mPayloads.size();
         PayloadContainer &oPayloads = other->mPayloads;
         const _detail::BySharedPointerAndMetaTypeID matcher(-1, mtid);
         const size_t numMatching = std::count_if(oPayloads.begin(), oPayloads.end(), matcher);
         mPayloads.resize(oldSize + numMatching);
         using namespace std; // for swap()
         for (auto dst = mPayloads.begin() + oldSize, src = oPayloads.begin(), end = oPayloads.end(); src != end; ++src) {
             if (matcher(*src)) {
                 swap(*dst, *src);
                 ++dst;
             }
         }
         return numMatching > 0;
     }
 
     void setPayloadBaseImpl(int spid, int mtid, std::unique_ptr<Internal::PayloadBase> &p, bool add) const /*sic!*/
     {
         if (!p.get()) {
             if (!add) {
                 mPayloads.clear();
             }
             return;
         }
 
         // if !add, delete all payload variants
         // (they're conversions of each other)
         mPayloadPath.clear();
         mPayloads.resize(add ? mPayloads.size() + 1 : 1);
         _detail::TypedPayload &tp = mPayloads.back();
         tp.payload.reset(p.release());
         tp.sharedPointerId = spid;
         tp.metaTypeId = mtid;
     }
 
     // Utilise the 4-bytes padding from QSharedData
     int mRevision;
     Item::Id mId;
     QString mRemoteId;
     QString mRemoteRevision;
     mutable QString mPayloadPath;
     mutable QScopedPointer<Collection> mParent;
     mutable PayloadContainer mPayloads;
     Item::Flags mFlags;
     Tag::List mTags;
     Relation::List mRelations;
     Item::Id mCollectionId;
     Collection::List mVirtualReferences;
     // TODO: Maybe just use uint? Would save us another 8 bytes after reordering
     qint64 mSize;
     QDateTime mModificationTime;
     QString mMimeType;
     QString mGid;
     QSet<QByteArray> mCachedPayloadParts;
     bool mFlagsOverwritten : 1;
     bool mTagsOverwritten : 1;
     bool mSizeChanged : 1;
     bool mClearPayload : 1;
     mutable bool mConversionInProgress;
     // 6 bytes padding here
 };
 
 }