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/**************************************************************
*
* 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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*************************************************************/
#ifndef VCL_TEXTLAYOUT_HXX
#define VCL_TEXTLAYOUT_HXX
#include "vcl/outdev.hxx"
#include <tools/solar.h>
#include <tools/string.hxx>
#include <memory>
class Control;
//........................................................................
namespace vcl
{
//........................................................................
//====================================================================
//= ITextLayout
//====================================================================
class SAL_NO_VTABLE ITextLayout
{
public:
virtual long GetTextWidth( const XubString& _rText, xub_StrLen _nStartIndex, xub_StrLen _nLength ) const = 0;
virtual void DrawText( const Point& _rStartPoint, const XubString& _rText, xub_StrLen _nStartIndex, xub_StrLen _nLength,
MetricVector* _pVector, String* _pDisplayText ) = 0;
virtual bool GetCaretPositions( const XubString& _rText, sal_Int32* _pCaretXArray, xub_StrLen _nStartIndex, xub_StrLen _nLength ) const = 0;
virtual xub_StrLen GetTextBreak( const XubString& _rText, long _nMaxTextWidth, xub_StrLen _nStartIndex, xub_StrLen _nLength ) const = 0;
virtual bool DecomposeTextRectAction() const = 0;
};
//====================================================================
//= DefaultTextLayout
//====================================================================
/** 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 XubString& _rText,
xub_StrLen _nStartIndex,
xub_StrLen _nLength
) const;
virtual void DrawText(
const Point& _rStartPoint,
const XubString& _rText,
xub_StrLen _nStartIndex,
xub_StrLen _nLength,
MetricVector* _pVector,
String* _pDisplayText
);
virtual bool GetCaretPositions(
const XubString& _rText,
sal_Int32* _pCaretXArray,
xub_StrLen _nStartIndex,
xub_StrLen _nLength
) const;
virtual xub_StrLen GetTextBreak(
const XubString& _rText,
long _nMaxTextWidth,
xub_StrLen _nStartIndex,
xub_StrLen _nLength
) const;
virtual bool DecomposeTextRectAction() const;
private:
OutputDevice& m_rTargetDevice;
};
//====================================================================
//= ControlTextRenderer
//====================================================================
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 XubString& _rText, sal_uInt16 _nStyle = 0,
MetricVector* _pVector = NULL, String* _pDisplayText = NULL );
private:
ControlTextRenderer(); // never implemented
ControlTextRenderer( const ControlTextRenderer& ); // never implemented
ControlTextRenderer& operator=( const ControlTextRenderer& ); // never implemented
private:
::std::auto_ptr< ReferenceDeviceTextLayout > m_pImpl;
};
//........................................................................
} // namespace vcl
//........................................................................
#endif // VCL_TEXTLAYOUT_HXX
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