Issue #118: First part of splitting

Pdf4QtLibCore/sources/pdficontheme.h

@@ -0,0 +1,72 @@
+//    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 PDFICONTHEME_H
+#define PDFICONTHEME_H
+
+#include "pdfglobal.h"
+
+#include <QAction>
+
+namespace pdf
+{
+
+/// Theme icon provider. Can provide icons from custom directory,
+/// so user can use their own icon theme.
+class PDF4QTLIBSHARED_EXPORT PDFIconTheme
+{
+public:
+    explicit PDFIconTheme() = default;
+
+    void registerAction(QAction* action, QString iconFileName);
+
+    QString getDirectory() const;
+    void setDirectory(const QString& directory);
+
+    QString getPrefix() const;
+    void setPrefix(const QString& prefix);
+
+    void prepareTheme();
+    void loadTheme();
+
+    QString getThemeDirectory() const;
+
+private:
+    struct ActionInfo
+    {
+        ActionInfo(QAction* action = nullptr, QString fileName = QString()) :
+            action(action),
+            fileName(std::move(fileName))
+        {
+
+        }
+
+        QAction* action = nullptr;
+        QString fileName;
+    };
+
+    QString m_directory;
+    QString m_prefix;
+
+    QString formatFileName(const ActionInfo& info, const QString& themeDirectory) const;
+
+    std::vector<ActionInfo> m_actionInfos;
+};
+
+}   // namespace pdf
+
+#endif // PDFICONTHEME_H