qqmljsimportvisitor_p.h

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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
#ifndef QQMLJSIMPORTEDMEMBERSVISITOR_P_H
#define QQMLJSIMPORTEDMEMBERSVISITOR_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/qtqmlcompilerexports_p.h>
 
#include "qqmljsannotation_p.h"
#include "qqmljsimporter_p.h"
#include "qqmljslogger_p.h"
#include "qqmljsscope_p.h"
#include "qqmljsscopesbyid_p.h"
 
#include <QtCore/qvariant.h>
#include <QtCore/qstack.h>
 
#include <private/qqmljsast_p.h>
#include <private/qqmljsdiagnosticmessage_p.h>
#include <private/qv4compileddata_p.h>
 
#include <functional>
 
QT_BEGIN_NAMESPACE
 
namespace QQmlJS::Dom {
class QQmlDomAstCreatorWithQQmlJSScope;
}
 
struct QQmlJSResourceFileMapper;
class Q_QMLCOMPILER_PRIVATE_EXPORT QQmlJSImportVisitor : public QQmlJS::AST::Visitor
{
public:
    QQmlJSImportVisitor();
    QQmlJSImportVisitor(const QQmlJSScope::Ptr &target,
                        QQmlJSImporter *importer, QQmlJSLogger *logger,
                        const QString &implicitImportDirectory,
                        const QStringList &qmldirFiles = QStringList());
    ~QQmlJSImportVisitor();
 
    using QQmlJS::AST::Visitor::endVisit;
    using QQmlJS::AST::Visitor::postVisit;
    using QQmlJS::AST::Visitor::preVisit;
    using QQmlJS::AST::Visitor::visit;
 
    QQmlJSScope::Ptr result() const { return m_exportedRootScope; }
 
    const QQmlJSLogger *logger() const { return m_logger; }
    QQmlJSLogger *logger() { return m_logger; }
 
    QQmlJSImporter::ImportedTypes imports() const { return m_rootScopeImports; }
    QQmlJSScopesById addressableScopes() const { return m_scopesById; }
    QHash<QQmlJS::SourceLocation, QQmlJSMetaSignalHandler> signalHandlers() const
    {
        return m_signalHandlers;
    }
    QSet<QQmlJSScope::ConstPtr> literalScopesToCheck() const { return m_literalScopesToCheck; }
    QList<QQmlJSScope::ConstPtr> qmlTypes() const { return m_qmlTypes; }
    QHash<QV4::CompiledData::Location, QQmlJSScope::ConstPtr> scopesBylocation() const
    {
        return m_scopesByIrLocation;
    }
 
    static QString implicitImportDirectory(
            const QString &localFile, QQmlJSResourceFileMapper *mapper);
 
    // ### should this be restricted?
    QQmlJSImporter *importer() { return m_importer; }
    const QQmlJSImporter *importer() const { return m_importer; }
 
    struct UnfinishedBinding
    {
        QQmlJSScope::Ptr owner;
        std::function<QQmlJSMetaPropertyBinding()> create;
        QQmlJSScope::BindingTargetSpecifier specifier = QQmlJSScope::SimplePropertyTarget;
    };
 
protected:
    // Linter warnings, we might want to move this at some point
    bool visit(QQmlJS::AST::StringLiteral *) override;
 
    bool visit(QQmlJS::AST::ExpressionStatement *ast) override;
    void endVisit(QQmlJS::AST::ExpressionStatement *ast) override;
 
    bool visit(QQmlJS::AST::UiProgram *) override;
    void endVisit(QQmlJS::AST::UiProgram *) override;
    bool visit(QQmlJS::AST::UiObjectDefinition *) override;
    void endVisit(QQmlJS::AST::UiObjectDefinition *) override;
    bool visit(QQmlJS::AST::UiInlineComponent *) override;
    void endVisit(QQmlJS::AST::UiInlineComponent *) override;
    bool visit(QQmlJS::AST::UiPublicMember *) override;
    void endVisit(QQmlJS::AST::UiPublicMember *) override;
    bool visit(QQmlJS::AST::UiRequired *required) override;
    bool visit(QQmlJS::AST::UiScriptBinding *) override;
    void endVisit(QQmlJS::AST::UiScriptBinding *) override;
    bool visit(QQmlJS::AST::UiArrayBinding *) override;
    void endVisit(QQmlJS::AST::UiArrayBinding *) override;
    bool visit(QQmlJS::AST::UiEnumDeclaration *uied) override;
    bool visit(QQmlJS::AST::FunctionExpression *fexpr) override;
    void endVisit(QQmlJS::AST::FunctionExpression *) override;
    bool visit(QQmlJS::AST::UiSourceElement *) override;
    bool visit(QQmlJS::AST::FunctionDeclaration *fdecl) override;
    void endVisit(QQmlJS::AST::FunctionDeclaration *) override;
    bool visit(QQmlJS::AST::ClassExpression *ast) override;
    void endVisit(QQmlJS::AST::ClassExpression *) override;
    bool visit(QQmlJS::AST::UiImport *import) override;
    bool visit(QQmlJS::AST::UiPragma *pragma) override;
    bool visit(QQmlJS::AST::ClassDeclaration *ast) override;
    void endVisit(QQmlJS::AST::ClassDeclaration *ast) override;
    bool visit(QQmlJS::AST::ForStatement *ast) override;
    void endVisit(QQmlJS::AST::ForStatement *ast) override;
    bool visit(QQmlJS::AST::ForEachStatement *ast) override;
    void endVisit(QQmlJS::AST::ForEachStatement *ast) override;
    bool visit(QQmlJS::AST::Block *ast) override;
    void endVisit(QQmlJS::AST::Block *ast) override;
    bool visit(QQmlJS::AST::CaseBlock *ast) override;
    void endVisit(QQmlJS::AST::CaseBlock *ast) override;
    bool visit(QQmlJS::AST::Catch *ast) override;
    void endVisit(QQmlJS::AST::Catch *ast) override;
    bool visit(QQmlJS::AST::WithStatement *withStatement) override;
    void endVisit(QQmlJS::AST::WithStatement *ast) override;
 
    bool visit(QQmlJS::AST::VariableDeclarationList *vdl) override;
    bool visit(QQmlJS::AST::FormalParameterList *fpl) override;
 
    bool visit(QQmlJS::AST::UiObjectBinding *uiob) override;
    void endVisit(QQmlJS::AST::UiObjectBinding *uiob) override;
 
    bool visit(QQmlJS::AST::ExportDeclaration *exp) override;
    void endVisit(QQmlJS::AST::ExportDeclaration *exp) override;
 
    bool visit(QQmlJS::AST::ESModule *module) override;
    void endVisit(QQmlJS::AST::ESModule *module) override;
 
    bool visit(QQmlJS::AST::Program *program) override;
    void endVisit(QQmlJS::AST::Program *program) override;
 
    void endVisit(QQmlJS::AST::FieldMemberExpression *) override;
    bool visit(QQmlJS::AST::IdentifierExpression *idexp) override;
 
    bool visit(QQmlJS::AST::PatternElement *) override;
 
    void throwRecursionDepthError() override;
 
    QString m_implicitImportDirectory;
    QStringList m_qmldirFiles;
    QQmlJSScope::Ptr m_currentScope;
    const QQmlJSScope::Ptr m_exportedRootScope;
    QQmlJSImporter *m_importer = nullptr;
    QQmlJSLogger *m_logger = nullptr;
 
    using RootDocumentNameType = QQmlJSScope::RootDocumentNameType;
    using InlineComponentNameType = QQmlJSScope::InlineComponentNameType;
    using InlineComponentOrDocumentRootName = QQmlJSScope::RootDocumentNameType;
    QQmlJSScope::InlineComponentOrDocumentRootName m_currentRootName =
            QQmlJSScope::RootDocumentNameType();
    bool m_nextIsInlineComponent = false;
    bool m_rootIsSingleton = false;
    QQmlJSScope::Ptr m_savedBindingOuterScope;
    QQmlJSScope::ConstPtr m_globalScope;
    QQmlJSScopesById m_scopesById;
    QQmlJSImporter::ImportedTypes m_rootScopeImports;
    QList<QQmlJSScope::ConstPtr> m_qmlTypes;
 
    // We need to record the locations as IR locations because those contain less data.
    // This way we can look up objects by IR location later.
    QHash<QV4::CompiledData::Location, QQmlJSScope::ConstPtr> m_scopesByIrLocation;
 
    // Maps all qmlNames to the source location of their import
    QMultiHash<QString, QQmlJS::SourceLocation> m_importTypeLocationMap;
    // Maps all static modules to the source location of their import
    QMultiHash<QString, QQmlJS::SourceLocation> m_importStaticModuleLocationMap;
    // Contains all import source locations (could be extracted from above but that is expensive)
    QSet<QQmlJS::SourceLocation> m_importLocations;
    // A set of all types that have been used during type resolution
    QSet<QString> m_usedTypes;
 
    QList<UnfinishedBinding> m_bindings;
 
    // stores JS functions and Script bindings per scope (only the name). mimics
    // the content of QmlIR::Object::functionsAndExpressions
    QHash<QQmlJSScope::ConstPtr, QList<QString>> m_functionsAndExpressions;
 
    struct FunctionOrExpressionIdentifier
    {
        QQmlJSScope::ConstPtr scope;
        QString name;
        friend bool operator==(const FunctionOrExpressionIdentifier &x,
                               const FunctionOrExpressionIdentifier &y)
        {
            return x.scope == y.scope && x.name == y.name;
        }
        friend bool operator!=(const FunctionOrExpressionIdentifier &x,
                               const FunctionOrExpressionIdentifier &y)
        {
            return !(x == y);
        }
        friend size_t qHash(const FunctionOrExpressionIdentifier &x, size_t seed = 0)
        {
            return qHashMulti(seed, x.scope, x.name);
        }
    };
 
    // tells whether last-processed UiScriptBinding is truly a script binding
    bool m_thisScriptBindingIsJavaScript = false;
    QStack<FunctionOrExpressionIdentifier> m_functionStack;
    // stores the number of functions inside each function
    QHash<FunctionOrExpressionIdentifier, int> m_innerFunctions;
    QQmlJSMetaMethod::RelativeFunctionIndex
    addFunctionOrExpression(const QQmlJSScope::ConstPtr &scope, const QString &name);
    void forgetFunctionExpression(const QString &name);
    int synthesizeCompilationUnitRuntimeFunctionIndices(const QQmlJSScope::Ptr &scope,
                                                        int count) const;
    void populateRuntimeFunctionIndicesForDocument() const;
 
    void enterEnvironment(QQmlJSScope::ScopeType type, const QString &name,
                          const QQmlJS::SourceLocation &location);
    // Finds an existing scope before attempting to create a new one. Returns \c
    // true if the scope already exists and \c false if the new scope is created
    bool enterEnvironmentNonUnique(QQmlJSScope::ScopeType type, const QString &name,
                                   const QQmlJS::SourceLocation &location);
    void leaveEnvironment();
 
    // A set of types that have not been resolved but have been used during the
    // AST traversal
    QSet<QQmlJSScope::ConstPtr> m_unresolvedTypes;
    template<typename ErrorHandler>
    bool isTypeResolved(const QQmlJSScope::ConstPtr &type, ErrorHandler handle)
    {
        if (type->isFullyResolved())
            return true;
 
        // Note: ignore duplicates, but only after we are certain that the type
        // is still unresolved
        if (m_unresolvedTypes.contains(type))
            return false;
 
        m_unresolvedTypes.insert(type);
 
        handle(type);
        return false;
    }
    bool isTypeResolved(const QQmlJSScope::ConstPtr &type);
 
    QVector<QQmlJSAnnotation> parseAnnotations(QQmlJS::AST::UiAnnotationList *list);
    void setAllBindings();
    void addDefaultProperties();
    void processDefaultProperties();
    void processPropertyBindings();
    void checkRequiredProperties();
    void processPropertyTypes();
    void processPropertyBindingObjects();
    void flushPendingSignalParameters();
 
    QQmlJSScope::ConstPtr scopeById(const QString &id, const QQmlJSScope::ConstPtr &current);
 
    void breakInheritanceCycles(const QQmlJSScope::Ptr &scope);
    void checkDeprecation(const QQmlJSScope::ConstPtr &scope);
    void checkGroupedAndAttachedScopes(QQmlJSScope::ConstPtr scope);
    bool rootScopeIsValid() const { return m_exportedRootScope->sourceLocation().isValid(); }
 
    enum class BindingExpressionParseResult { Invalid, Script, Literal, Translation };
    BindingExpressionParseResult parseBindingExpression(const QString &name,
                                                        const QQmlJS::AST::Statement *statement);
    bool isImportPrefix(QString prefix) const;
 
    // Used to temporarily store annotations for functions and generators wrapped in UiSourceElements
    QVector<QQmlJSAnnotation> m_pendingMethodAnnotations;
 
    struct PendingPropertyType
    {
        QQmlJSScope::Ptr scope;
        QString name;
        QQmlJS::SourceLocation location;
    };
 
    struct PendingPropertyObjectBinding
    {
        QQmlJSScope::Ptr scope;
        QQmlJSScope::Ptr childScope;
        QString name;
        QQmlJS::SourceLocation location;
        bool onToken;
    };
 
    struct RequiredProperty
    {
        QQmlJSScope::Ptr scope;
        QString name;
        QQmlJS::SourceLocation location;
    };
 
    template<typename T>
    struct WithVisibilityScope
    {
        QQmlJSScope::Ptr visibilityScope;
        QQmlJS::SourceLocation dataLocation;
        T data;
    };
 
    QHash<QQmlJSScope::Ptr, QVector<QQmlJSScope::Ptr>> m_pendingDefaultProperties;
    QVector<PendingPropertyType> m_pendingPropertyTypes;
    QVector<PendingPropertyObjectBinding> m_pendingPropertyObjectBindings;
    QVector<RequiredProperty> m_requiredProperties;
    QVector<QQmlJSScope::Ptr> m_objectBindingScopes;
    QVector<QQmlJSScope::Ptr> m_objectDefinitionScopes;
 
    QHash<QQmlJSScope::Ptr, QVector<WithVisibilityScope<QString>>> m_propertyBindings;
 
    QHash<QQmlJS::SourceLocation, QQmlJSMetaSignalHandler> m_signalHandlers;
    QSet<QQmlJSScope::ConstPtr> m_literalScopesToCheck;
    QQmlJS::SourceLocation m_pendingSignalHandler;
 
private:
    void checkSignal(
            const QQmlJSScope::ConstPtr &signalScope, const QQmlJS::SourceLocation &location,
            const QString &handlerName, const QStringList &handlerParameters);
    void importBaseModules();
    void resolveAliasesAndIds();
    void handleIdDeclaration(QQmlJS::AST::UiScriptBinding *scriptBinding);
 
    void visitFunctionExpressionHelper(QQmlJS::AST::FunctionExpression *fexpr);
    void processImportWarnings(
            const QString &what,
            const QQmlJS::SourceLocation &srcLocation = QQmlJS::SourceLocation());
    void addImportWithLocation(const QString &name, const QQmlJS::SourceLocation &loc);
    void populateCurrentScope(QQmlJSScope::ScopeType type, const QString &name,
                              const QQmlJS::SourceLocation &location);
    void enterRootScope(QQmlJSScope::ScopeType type, const QString &name,
                           const QQmlJS::SourceLocation &location);
 
    void importFromHost(const QString &path, const QString &prefix,
                        const QQmlJS::SourceLocation &location);
    void importFromQrc(const QString &path, const QString &prefix,
                       const QQmlJS::SourceLocation &location);
 
public:
    friend class QQmlJS::Dom::QQmlDomAstCreatorWithQQmlJSScope;
};
 
QT_END_NAMESPACE
 
#endif // QQMLJSIMPORTEDMEMBERSVISITOR_P_H