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/* -*- 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>
#include <rtl/ustring.hxx>
#include <vcl/outdev.hxx>
class Control;
namespace vcl
{
class SAL_NO_VTABLE ITextLayout
{
public:
virtual 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,
MetricVector* _pVector, OUString* _pDisplayText ) = 0;
virtual bool GetCaretPositions( const OUString& _rText, long* _pCaretXArray, sal_Int32 _nStartIndex, sal_Int32 _nLength ) const = 0;
virtual sal_Int32 GetTextBreak( const OUString& _rText, long _nMaxTextWidth, sal_Int32 _nStartIndex, sal_Int32 _nLength ) const = 0;
virtual bool DecomposeTextRectAction() const = 0;
protected:
~ITextLayout() {}
};
/** 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 : public ITextLayout
{
public:
DefaultTextLayout( OutputDevice& _rTargetDevice )
: m_rTargetDevice( _rTargetDevice )
{
}
virtual ~DefaultTextLayout();
// ITextLayout overridables
virtual long GetTextWidth( const OUString& _rText,
sal_Int32 _nStartIndex,
sal_Int32 _nLength ) const SAL_OVERRIDE;
virtual void DrawText( const Point& _rStartPoint,
const OUString& _rText,
sal_Int32 _nStartIndex,
sal_Int32 _nLength,
MetricVector* _pVector,
OUString* _pDisplayText ) SAL_OVERRIDE;
virtual bool GetCaretPositions( const OUString& _rText,
long* _pCaretXArray,
sal_Int32 _nStartIndex,
sal_Int32 _nLength ) const SAL_OVERRIDE;
virtual sal_Int32 GetTextBreak( const OUString& _rText,
long _nMaxTextWidth,
sal_Int32 _nStartIndex,
sal_Int32 _nLength ) const SAL_OVERRIDE;
virtual bool DecomposeTextRectAction() const SAL_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
{
public:
ControlTextRenderer( const Control& _rControl, OutputDevice& _rTargetDevice, OutputDevice& _rReferenceDevice );
virtual ~ControlTextRenderer();
Rectangle DrawText( const Rectangle& _rRect,
const OUString& _rText, sal_uInt16 _nStyle = 0,
MetricVector* _pVector = NULL, OUString* _pDisplayText = NULL );
private:
ControlTextRenderer(); // never implemented
ControlTextRenderer( const ControlTextRenderer& ); // never implemented
ControlTextRenderer& operator=( const ControlTextRenderer& ); // never implemented
private:
::std::unique_ptr< ReferenceDeviceTextLayout > m_pImpl;
};
} // namespace vcl
#endif // INCLUDED_VCL_INC_TEXTLAYOUT_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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