DocDiff application: Initial commit

Pdf4QtLib/sources/pdfdiff.h

@@ -0,0 +1,55 @@
+//    Copyright (C) 2021 Jakub Melka
+//
+//    This file is part of PDF4QT.
+//
+//    PDF4QT is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    with the written consent of the copyright owner, any later version.
+//
+//    PDF4QT is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDF4QT.  If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef PDFDIFF_H
+#define PDFDIFF_H
+
+#include "pdfdocument.h"
+
+#include <QObject>
+
+namespace pdf
+{
+
+/// Diff engine for comparing two pdf documents.
+class PDFDiff : public QObject
+{
+    Q_OBJECT
+
+private:
+    using BaseClass = QObject;
+
+public:
+    explicit PDFDiff(QObject* parent);
+
+    void setLeftDocument(const PDFDocument* leftDocument);
+    void setRightDocument(const PDFDocument* rightDocument);
+
+    /// Clears data (but not source document pointers,
+    /// for them, use setters), also stops comparing engine.
+    void clear();
+
+private:
+    void stopEngine();
+
+    const PDFDocument* m_leftDocument;
+    const PDFDocument* m_rightDocument;
+};
+
+}   // namespace pdf
+
+#endif // PDFDIFF_H