Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 112 insertions, 0 deletions

diff --git a/vcl/inc/textlayout.hxx b/vcl/inc/textlayout.hxx
new file mode 100644
index 000000000..43757d642
--- /dev/null
+++ b/vcl/inc/textlayout.hxx
@@ -0,0 +1,112 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_INC_TEXTLAYOUT_HXX
+#define INCLUDED_VCL_INC_TEXTLAYOUT_HXX
+
+#include <memory>
+
+class Control;
+
+namespace vcl
+{
+    class SAL_NO_VTABLE ITextLayout
+    {
+    public:
+        virtual tools::Long        GetTextWidth( const OUString& _rText, sal_Int32 _nStartIndex, sal_Int32 _nLength ) const = 0;
+        virtual void        DrawText( const Point& _rStartPoint, const OUString& _rText, sal_Int32 _nStartIndex, sal_Int32 _nLength,
+                                std::vector< tools::Rectangle >* _pVector, OUString* _pDisplayText ) = 0;
+        virtual void        GetCaretPositions( const OUString& _rText, sal_Int32* _pCaretXArray, sal_Int32 _nStartIndex, sal_Int32 _nLength ) const = 0;
+        virtual sal_Int32   GetTextBreak( const OUString& _rText, tools::Long _nMaxTextWidth, sal_Int32 _nStartIndex, sal_Int32 _nLength ) const = 0;
+        virtual bool        DecomposeTextRectAction() const = 0;
+
+    protected:
+        ~ITextLayout() COVERITY_NOEXCEPT_FALSE {}
+    };
+
+    /** is an implementation of the ITextLayout interface which simply delegates its calls to the respective
+        methods of an OutputDevice instance, without any inbetween magic.
+    */
+    class DefaultTextLayout final : public ITextLayout
+    {
+    public:
+        DefaultTextLayout( OutputDevice& _rTargetDevice )
+            : m_rTargetDevice( _rTargetDevice )
+        {
+        }
+        virtual ~DefaultTextLayout();
+
+        // ITextLayout overridables
+        virtual tools::Long        GetTextWidth( const OUString& _rText,
+                                          sal_Int32 _nStartIndex,
+                                          sal_Int32 _nLength ) const override;
+
+        virtual void        DrawText( const Point& _rStartPoint,
+                                      const OUString& _rText,
+                                      sal_Int32 _nStartIndex,
+                                      sal_Int32 _nLength,
+                                      std::vector< tools::Rectangle >* _pVector,
+                                      OUString* _pDisplayText ) override;
+
+        virtual void        GetCaretPositions( const OUString& _rText,
+                                               sal_Int32* _pCaretXArray,
+                                               sal_Int32 _nStartIndex,
+                                               sal_Int32 _nLength ) const override;
+
+        virtual sal_Int32   GetTextBreak( const OUString& _rText,
+                                          tools::Long _nMaxTextWidth,
+                                          sal_Int32 _nStartIndex,
+                                          sal_Int32 _nLength ) const override;
+
+        virtual bool        DecomposeTextRectAction() const override;
+
+    private:
+        OutputDevice&   m_rTargetDevice;
+    };
+
+    class ReferenceDeviceTextLayout;
+    /** a class which allows rendering text of a Control onto a device, by taking into account the metrics of
+        a reference device.
+    */
+    class ControlTextRenderer final
+    {
+    public:
+        ControlTextRenderer( const Control& _rControl, OutputDevice& _rTargetDevice, OutputDevice& _rReferenceDevice );
+        ~ControlTextRenderer();
+
+        tools::Rectangle   DrawText( const tools::Rectangle& _rRect,
+                              const OUString& _rText, DrawTextFlags _nStyle,
+                              std::vector< tools::Rectangle >* _pVector, OUString* _pDisplayText, const Size* i_pDeviceSize );
+
+        tools::Rectangle   GetTextRect( const tools::Rectangle& _rRect,
+                                 const OUString& _rText, DrawTextFlags _nStyle, Size* o_pDeviceSize );
+
+    private:
+        ControlTextRenderer( const ControlTextRenderer& ) = delete;
+        ControlTextRenderer& operator=( const ControlTextRenderer& ) = delete;
+
+    private:
+        ::std::unique_ptr< ReferenceDeviceTextLayout >   m_pImpl;
+    };
+
+} // namespace vcl
+
+#endif // INCLUDED_VCL_INC_TEXTLAYOUT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */