1 files changed, 63 insertions, 0 deletions
diff --git a/src/linguist/lupdate/filesignificancecheck.h b/src/linguist/lupdate/filesignificancecheck.h
new file mode 100644
index 000000000..15a947133
--- /dev/null
+++ b/src/linguist/lupdate/filesignificancecheck.h
@@ -0,0 +1,63 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef FILESIGNIFICANCECHECK_H
+#define FILESIGNIFICANCECHECK_H
+
+#include <QtCore/qdir.h>
+#include <QtCore/qregularexpression.h>
+#include <QtCore/qstringlist.h>
+
+#include <shared_mutex>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+QT_BEGIN_NAMESPACE
+
+class FileSignificanceCheck
+{
+public:
+    FileSignificanceCheck() = default;
+
+    static void create()
+    {
+        m_instance = new FileSignificanceCheck;
+    }
+
+    static void destroy()
+    {
+        delete m_instance;
+        m_instance = nullptr;
+    }
+
+    static FileSignificanceCheck *the()
+    {
+        return m_instance;
+    }
+
+    void setRootDirectories(const QStringList &paths);
+    void setExclusionPatterns(const QStringList &patterns);
+
+    bool isFileSignificant(const std::string &filePath) const;
+
+private:
+    static FileSignificanceCheck *m_instance;
+    std::vector<QDir> m_rootDirs;
+    std::vector<QRegularExpression> m_exclusionRegExes;
+    mutable std::unordered_map<std::string, bool> m_cache;
+    mutable std::shared_mutex m_cacheMutex;
+};
+
+namespace LupdatePrivate {
+
+inline bool isFileSignificant(const std::string &filePath)
+{
+    return FileSignificanceCheck::the()->isFileSignificant(filePath);
+}
+
+} // namespace LupdatePrivate
+
+QT_END_NAMESPACE
+
+#endif // header guard