qmetatypesjsonprocessor_p.h

Go to the documentation of this file.

// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
#ifndef METATYPESJSONPROCESSOR_P_H
#define METATYPESJSONPROCESSOR_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <private/qduplicatetracker_p.h>
 
#include <QtCore/qcbormap.h>
#include <QtCore/qstring.h>
#include <QtCore/qtyperevision.h>
#include <QtCore/qvarlengtharray.h>
#include <QtCore/qvector.h>
 
QT_BEGIN_NAMESPACE
 
// With all the QAnyStringViews in this file we rely on the Cbor data to stay
// in place if you don't change the Cbor contents. We assume that Cbor data
// is implicitly shared so that merely copying const Cbor objects does not copy
// the contents.
 
enum class Access { Public, Protected, Private };
 
struct BaseType
{
    using Container = QVarLengthArray<BaseType, 1>;
 
    BaseType() = default;
    BaseType(const QCborMap &cbor);
 
    QAnyStringView name;
    Access access;
};
 
struct ClassInfo
{
    using Container = std::vector<ClassInfo>;
 
    ClassInfo() = default;
    ClassInfo(const QCborMap &cbor);
 
    QAnyStringView name;
    QAnyStringView value;
};
 
struct Interface
{
    using Container = QVarLengthArray<Interface, 1>;
 
    Interface() = default;
    Interface(const QCborValue &cbor);
 
    QAnyStringView className;
};
 
struct Property
{
    using Container = std::vector<Property>;
 
    Property() = default;
    Property(const QCborMap &cbor);
 
    QAnyStringView name;
    QAnyStringView type;
 
    QAnyStringView member;
    QAnyStringView read;
    QAnyStringView write;
    QAnyStringView reset;
    QAnyStringView notify;
    QAnyStringView bindable;
 
    QAnyStringView privateClass;
 
    int index = -1;
    int lineNumber = 0;
 
    QTypeRevision revision;
 
    bool isFinal = false;
    bool isConstant = false;
    bool isRequired = false;
};
 
struct Argument
{
    using Container = std::vector<Argument>;
 
    Argument() = default;
    Argument(const QCborMap &cbor);
 
    QAnyStringView name;
    QAnyStringView type;
};
 
struct Method
{
    using Container = std::vector<Method>;
    static constexpr int InvalidIndex = std::numeric_limits<int>::min();
 
    Method() = default;
    Method(const QCborMap &cbor, bool isConstructor);
 
    QAnyStringView name;
 
    Argument::Container arguments;
    QAnyStringView returnType;
 
    int index = InvalidIndex;
    int lineNumber = 0;
 
    QTypeRevision revision;
 
    Access access = Access::Public;
 
    bool isCloned = false;
    bool isJavaScriptFunction = false;
    bool isConstructor = false;
    bool isConst = false;
};
 
struct Enum
{
    using Container = std::vector<Enum>;
 
    Enum() = default;
    Enum(const QCborMap &cbor);
 
    QAnyStringView name;
    QAnyStringView alias;
    QAnyStringView type;
 
    QList<QAnyStringView> values;
 
    int lineNumber = 0;
    bool isFlag = false;
    bool isClass = false;
};
 
struct MetaTypePrivate
{
    Q_DISABLE_COPY_MOVE(MetaTypePrivate)
 
    enum Kind : quint8 { Object, Gadget, Namespace, Unknown };
 
    MetaTypePrivate() = default;
    MetaTypePrivate(const QCborMap &cbor, const QString &inputFile);
 
    const QCborMap cbor; // need to keep this to hold on to the strings
    const QString inputFile;
 
    QAnyStringView className;
    QAnyStringView qualifiedClassName;
    BaseType::Container superClasses;
    ClassInfo::Container classInfos;
    Interface::Container ifaces;
 
    Property::Container properties;
 
    Method::Container methods;
    Method::Container sigs;
    Method::Container constructors;
 
    Enum::Container enums;
 
    Kind kind = Unknown;
    int lineNumber = 0;
};
 
class MetaType
{
public:
    using Kind = MetaTypePrivate::Kind;
 
    MetaType() = default;
    MetaType(const QCborMap &cbor, const QString &inputFile);
 
    bool isEmpty() const { return d == &s_empty; }
 
    QString inputFile() const { return d->inputFile; }
    int lineNumber() const { return d->lineNumber; }
    QAnyStringView className() const { return d->className; }
    QAnyStringView qualifiedClassName() const { return d->qualifiedClassName; }
    const BaseType::Container &superClasses() const { return d->superClasses; }
    const ClassInfo::Container &classInfos() const { return d->classInfos; }
    const Interface::Container &ifaces() const { return d->ifaces; }
 
    const Property::Container &properties() const { return d->properties; }
    const Method::Container &methods() const { return d->methods; }
    const Method::Container &sigs() const { return d->sigs; }
    const Method::Container &constructors() const { return d->constructors; }
 
    const Enum::Container &enums() const { return d->enums; }
 
    Kind kind() const { return d->kind; }
 
private:
    friend bool operator==(const MetaType &a, const MetaType &b) noexcept
    {
        return a.d == b.d;
    }
 
    friend bool operator!=(const MetaType &a, const MetaType &b) noexcept
    {
        return !(a == b);
    }
 
    static const MetaTypePrivate s_empty;
    const MetaTypePrivate *d = &s_empty;
};
 
struct UsingDeclaration {
    QAnyStringView alias;
    QAnyStringView original;
 
    bool isValid() const { return !alias.isEmpty() && !original.isEmpty(); }
private:
    friend bool comparesEqual(const UsingDeclaration &a, const UsingDeclaration &b) noexcept
    {
        return std::tie(a.alias, a.original) == std::tie(b.alias, b.original);
    }
 
    friend Qt::strong_ordering compareThreeWay(
            const UsingDeclaration &a, const UsingDeclaration &b) noexcept
    {
        return a.alias != b.alias
                ? compareThreeWay(a.alias, b.alias)
                : compareThreeWay(a.original, b.original);
    }
    Q_DECLARE_STRONGLY_ORDERED(UsingDeclaration);
};
 
class MetaTypesJsonProcessor
{
public:
    static QList<QAnyStringView> namespaces(const MetaType &classDef);
 
    MetaTypesJsonProcessor(bool privateIncludes) : m_privateIncludes(privateIncludes) {}
 
    bool processTypes(const QStringList &files);
 
    bool processForeignTypes(const QString &foreignTypesFile);
    bool processForeignTypes(const QStringList &foreignTypesFiles);
 
    void postProcessTypes();
    void postProcessForeignTypes();
 
    QVector<MetaType> types() const { return m_types; }
    QVector<MetaType> foreignTypes() const { return m_foreignTypes; }
    QList<QAnyStringView> referencedTypes() const { return m_referencedTypes; }
    QList<UsingDeclaration> usingDeclarations() const { return m_usingDeclarations; }
    QList<QString> includes() const { return m_includes; }
 
    QString extractRegisteredTypes() const;
 
private:
    enum RegistrationMode {
        NoRegistration,
        ObjectRegistration,
        GadgetRegistration,
        NamespaceRegistration
    };
 
    struct PreProcessResult {
        QList<QAnyStringView> primitiveAliases;
        UsingDeclaration usingDeclaration;
        QAnyStringView foreignPrimitive;
        RegistrationMode mode;
    };
 
    enum class PopulateMode { No, Yes };
    static PreProcessResult preProcess(const MetaType &classDef, PopulateMode populateMode);
    void addRelatedTypes();
 
    void sortTypes(QVector<MetaType> &types);
    QString resolvedInclude(QAnyStringView include);
    void processTypes(const QCborMap &types);
    void processForeignTypes(const QCborMap &types);
 
    bool isPrimitive(QAnyStringView type) const
    {
        return std::binary_search(m_primitiveTypes.begin(), m_primitiveTypes.end(), type);
    }
 
    QList<QString> m_includes;
    QList<QAnyStringView> m_referencedTypes;
    QList<QAnyStringView> m_primitiveTypes;
    QList<UsingDeclaration> m_usingDeclarations;
    QVector<MetaType> m_types;
    QVector<MetaType> m_foreignTypes;
    QDuplicateTracker<QString> m_seenMetaTypesFiles;
    bool m_privateIncludes = false;
};
 
QT_END_NAMESPACE
 
#endif // METATYPESJSONPROCESSOR_P_H