qmllint: Add flags for toggling warnings

Enables all warnings by default and makes it possible to toggle
individual ones using command line flags.

Change-Id: Ie55f32f646fd9422313977969f9f00b59ee9ad99
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 174 insertions, 0 deletions

diff --git a/tools/qmllint/findwarnings.h b/tools/qmllint/findwarnings.h
new file mode 100644
index 0000000000..2b99beeac9
--- /dev/null
+++ b/tools/qmllint/findwarnings.h
@@ -0,0 +1,174 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef FINDUNQUALIFIED_H
+#define FINDUNQUALIFIED_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 "typedescriptionreader.h"
+#include "scopetree.h"
+#include "qcoloroutput.h"
+
+#include <QtQml/private/qqmljsastvisitor_p.h>
+#include <QtQml/private/qqmljsast_p.h>
+
+#include <QtCore/qscopedpointer.h>
+
+class FindWarningVisitor : public QQmlJS::AST::Visitor
+{
+    Q_DISABLE_COPY_MOVE(FindWarningVisitor)
+public:
+    explicit FindWarningVisitor(QStringList qmltypeDirs, QStringList qmltypeFiles, QString code,
+                                      QString fileName, bool silent, bool warnUnqualified,
+                                      bool warnWithStatement, bool warnInheritanceCycle);
+    ~FindWarningVisitor() override = default;
+    bool check();
+
+private:
+    struct Import {
+        QHash<QString, ScopeTree::ConstPtr> objects;
+        QStringList dependencies;
+    };
+
+    ScopeTree::Ptr m_rootScope;
+    ScopeTree::Ptr m_currentScope;
+    QQmlJS::AST::ExpressionNode *m_fieldMemberBase = nullptr;
+    QHash<QString, ScopeTree::ConstPtr> m_types;
+    QHash<QString, ScopeTree::ConstPtr> m_exportedName2Scope;
+    QStringList m_qmltypeDirs;
+    QStringList m_qmltypeFiles;
+    QString m_code;
+    QHash<QString, ScopeTree::ConstPtr> m_qmlid2scope;
+    QString m_rootId;
+    QString m_filePath;
+    QSet<QPair<QString, QString>> m_alreadySeenImports;
+    QSet<QString> m_unknownImports;
+    ColorOutput m_colorOut;
+    bool m_visitFailed = false;
+
+    bool m_warnUnqualified;
+    bool m_warnWithStatement;
+    bool m_warnInheritanceCycle;
+
+    struct OutstandingConnection
+    {
+        QString targetName;
+        ScopeTree::Ptr scope;
+        QQmlJS::AST::UiObjectDefinition *uiod;
+    };
+
+    QVarLengthArray<OutstandingConnection, 3> m_outstandingConnections; // Connections whose target we have not encountered
+
+    void enterEnvironment(ScopeType type, const QString &name);
+    void leaveEnvironment();
+    void importHelper(const QString &module, const QString &prefix = QString(),
+                      QTypeRevision version = QTypeRevision());
+
+    void readQmltypes(const QString &filename, Import &result);
+    Import readQmldir(const QString &dirname);
+    void processImport(const QString &prefix, const Import &import);
+
+    ScopeTree::Ptr localFile2ScopeTree(const QString &filePath);
+
+    void importFileOrDirectory(const QString &directory, const QString &prefix);
+    void importExportedNames(const QStringRef &prefix, QString name);
+
+    void parseHeaders(QQmlJS::AST::UiHeaderItemList *headers);
+    ScopeTree::Ptr parseProgram(QQmlJS::AST::Program *program, const QString &name);
+
+    void throwRecursionDepthError() override;
+
+    // start block/scope handling
+    bool visit(QQmlJS::AST::UiProgram *ast) override;
+    void endVisit(QQmlJS::AST::UiProgram *ast) override;
+
+    bool visit(QQmlJS::AST::ClassExpression *ast) override;
+    void endVisit(QQmlJS::AST::ClassExpression *ast) 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;
+
+    void visitFunctionExpressionHelper(QQmlJS::AST::FunctionExpression *fexpr);
+    bool visit(QQmlJS::AST::FunctionExpression *fexpr) override;
+    void endVisit(QQmlJS::AST::FunctionExpression *fexpr) override;
+
+    bool visit(QQmlJS::AST::FunctionDeclaration *fdecl) override;
+    void endVisit(QQmlJS::AST::FunctionDeclaration *fdecl) override;
+    /* --- end block handling --- */
+
+    bool visit(QQmlJS::AST::VariableDeclarationList *vdl) override;
+    bool visit(QQmlJS::AST::FormalParameterList *fpl) override;
+
+    bool visit(QQmlJS::AST::UiImport *import) override;
+    bool visit(QQmlJS::AST::UiEnumDeclaration *uied) override;
+    bool visit(QQmlJS::AST::UiObjectBinding *uiob) override;
+    void endVisit(QQmlJS::AST::UiObjectBinding *uiob) override;
+    bool visit(QQmlJS::AST::UiObjectDefinition *uiod) override;
+    void endVisit(QQmlJS::AST::UiObjectDefinition *) override;
+    bool visit(QQmlJS::AST::UiScriptBinding *uisb) override;
+    bool visit(QQmlJS::AST::UiPublicMember *uipm) override;
+
+    // expression handling
+    bool visit(QQmlJS::AST::IdentifierExpression *idexp) override;
+
+    bool visit(QQmlJS::AST::PatternElement *) override;
+    bool visit(QQmlJS::AST::FieldMemberExpression *idprop) override;
+    void endVisit(QQmlJS::AST::FieldMemberExpression *) override;
+
+    bool visit(QQmlJS::AST::BinaryExpression *) override;
+    void endVisit(QQmlJS::AST::BinaryExpression *) override;
+};
+
+#endif // FINDUNQUALIFIED_H