Issue #118: First part of splitting

Pdf4QtLibCore/sources/pdfexception.h

@@ -0,0 +1,118 @@
+//    Copyright (C) 2019-2021 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 PDFEXCEPTION_H
+#define PDFEXCEPTION_H
+
+#include <QString>
+
+namespace pdf
+{
+
+class PDFException : public std::exception
+{
+public:
+    PDFException(const QString& message) :
+        m_message(message)
+    {
+
+    }
+
+    /// Returns error message
+    const QString& getMessage() const { return m_message; }
+
+private:
+    QString m_message;
+};
+
+enum RenderErrorType
+{
+    Error,
+    Warning,
+    NotImplemented,
+    NotSupported,
+    Information
+};
+
+struct PDFRenderError
+{
+    explicit PDFRenderError() = default;
+    explicit PDFRenderError(RenderErrorType type, QString message) :
+        type(type),
+        message(std::move(message))
+    {
+
+    }
+
+    RenderErrorType type = RenderErrorType::Error;
+    QString message;
+};
+
+class PDFRendererException : public std::exception
+{
+public:
+    explicit PDFRendererException(RenderErrorType type, QString message) :
+        m_error(type, std::move(message))
+    {
+
+    }
+
+    const PDFRenderError& getError() const { return m_error; }
+
+private:
+    PDFRenderError m_error;
+};
+
+/// Abstract class for reporting render errors
+class PDFRenderErrorReporter
+{
+public:
+    explicit PDFRenderErrorReporter() = default;
+    virtual ~PDFRenderErrorReporter() = default;
+
+    /// Reports render errors
+    /// \param type Error type
+    /// \param message Error message
+    virtual void reportRenderError(RenderErrorType type, QString message) = 0;
+
+    /// Reports render error, but only once - if same error was already reported,
+    /// then no new error is reported.
+    /// \param type Error type
+    /// \param message Error message
+    virtual void reportRenderErrorOnce(RenderErrorType type, QString message) = 0;
+};
+
+/// Dummy class for reporting render errors
+class PDFRenderErrorReporterDummy : public PDFRenderErrorReporter
+{
+public:
+    virtual void reportRenderError(RenderErrorType type, QString message) override
+    {
+        Q_UNUSED(type);
+        Q_UNUSED(message);
+    }
+
+    virtual void reportRenderErrorOnce(RenderErrorType type, QString message) override
+    {
+        Q_UNUSED(type);
+        Q_UNUSED(message);
+    }
+};
+
+}   // namespace pdf
+
+#endif // PDFEXCEPTION_H