| 1 | // Copyright (C) 2020 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #include "qv4resolvedtypereference_p.h" |
| 5 | |
| 6 | #include <QtQml/private/qqmlengine_p.h> |
| 7 | #include <QtQml/qqmlpropertymap.h> |
| 8 | #include <QtCore/qcryptographichash.h> |
| 9 | |
| 10 | QT_BEGIN_NAMESPACE |
| 11 | |
| 12 | namespace QV4 { |
| 13 | |
| 14 | template <typename T> |
| 15 | bool qtTypeInherits(const QMetaObject *mo) { |
| 16 | while (mo) { |
| 17 | if (mo == &T::staticMetaObject) |
| 18 | return true; |
| 19 | mo = mo->superClass(); |
| 20 | } |
| 21 | return false; |
| 22 | } |
| 23 | |
| 24 | void ResolvedTypeReference::doDynamicTypeCheck() |
| 25 | { |
| 26 | const QMetaObject *mo = nullptr; |
| 27 | if (m_typePropertyCache) { |
| 28 | mo = m_typePropertyCache->firstCppMetaObject(); |
| 29 | } else if (m_type.isValid()) { |
| 30 | mo = m_type.metaObject(); |
| 31 | } else if (m_compilationUnit) { |
| 32 | if (const auto cache = m_compilationUnit->rootPropertyCache()) |
| 33 | mo = cache->firstCppMetaObject(); |
| 34 | } |
| 35 | m_isFullyDynamicType = qtTypeInherits<QQmlPropertyMap>(mo); |
| 36 | } |
| 37 | |
| 38 | /*! |
| 39 | Returns the property cache, creating one if it doesn't already exist. The cache is not referenced. |
| 40 | */ |
| 41 | QQmlPropertyCache::ConstPtr ResolvedTypeReference::createPropertyCache() |
| 42 | { |
| 43 | if (m_typePropertyCache) { |
| 44 | return m_typePropertyCache; |
| 45 | } else if (m_type.isValid()) { |
| 46 | const QMetaObject *metaObject = m_type.metaObject(); |
| 47 | if (!metaObject) // value type of non-Q_GADGET base with extension |
| 48 | metaObject = m_type.extensionMetaObject(); |
| 49 | if (metaObject) |
| 50 | m_typePropertyCache = QQmlMetaType::propertyCache(metaObject, version: m_version); |
| 51 | return m_typePropertyCache; |
| 52 | } else { |
| 53 | Q_ASSERT(m_compilationUnit); |
| 54 | return m_compilationUnit->rootPropertyCache(); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | bool ResolvedTypeReference::addToHash( |
| 59 | QCryptographicHash *hash, QHash<quintptr, QByteArray> *checksums) |
| 60 | { |
| 61 | if (m_type.isInlineComponentType()) { |
| 62 | |
| 63 | // A reference to an inline component in the same file will have |
| 64 | // - no compilation unit since we cannot resolve the compilation unit before it's built. |
| 65 | // - a property cache since we've assigned one in buildMetaObjectsIncrementally(). |
| 66 | // - a QQmlType that says it's an inline component. |
| 67 | // We don't have to add such a thing to the hash since if it changes, the QML document |
| 68 | // itself changes, leading to a new timestamp, which is checked before the checksum. |
| 69 | if (!m_compilationUnit) |
| 70 | return !m_typePropertyCache.isNull(); |
| 71 | |
| 72 | } else if (m_type.isValid()) { |
| 73 | bool ok = false; |
| 74 | if (QQmlPropertyCache::ConstPtr propertyCache = createPropertyCache()) |
| 75 | hash->addData(data: propertyCache->checksum(checksums, ok: &ok)); |
| 76 | else |
| 77 | Q_ASSERT(m_type.module() == QLatin1String("QML")); // a builtin without metaobject |
| 78 | return ok; |
| 79 | } |
| 80 | if (!m_compilationUnit) |
| 81 | return false; |
| 82 | hash->addData(data: {m_compilationUnit->unitData()->md5Checksum, |
| 83 | sizeof(m_compilationUnit->unitData()->md5Checksum)}); |
| 84 | return true; |
| 85 | } |
| 86 | |
| 87 | } // namespace QV4 |
| 88 | |
| 89 | QT_END_NAMESPACE |
| 90 |