270 lines
12 KiB
C++
270 lines
12 KiB
C++
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/*************************************************************************
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2009 by Sun Microsystems, Inc.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_vcl.hxx"
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#include "vcl/ctrl.hxx"
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#include "vcl/outdev.hxx"
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#include "vcl/outfont.hxx"
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#include "vcl/textlayout.hxx"
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//........................................................................
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namespace vcl
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{
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//........................................................................
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//====================================================================
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//= ReferenceDeviceTextLayout
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//====================================================================
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class ReferenceDeviceTextLayout : public ITextLayout
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{
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public:
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ReferenceDeviceTextLayout( const Control& _rControl, OutputDevice& _rTargetDevice, OutputDevice& _rReferenceDevice );
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virtual ~ReferenceDeviceTextLayout();
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// ITextLayout
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virtual long GetTextWidth( const XubString& rStr, xub_StrLen nIndex, xub_StrLen nLen ) const;
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virtual void DrawText( const Point& _rStartPoint, const XubString& _rText, xub_StrLen _nStartIndex, xub_StrLen _nLength, MetricVector* _pVector, String* _pDisplayText );
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public:
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// equivalents to the respective OutputDevice methods, which take the reference device into account
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long GetTextArray( const XubString& _rText, sal_Int32* _pDXAry, xub_StrLen _nStartIndex, xub_StrLen _nLength ) const;
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Rectangle DrawText( const Rectangle& _rRect, const XubString& _rText, USHORT _nStyle, MetricVector* _pVector, String* _pDisplayText);
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bool IsZoom() const;
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protected:
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void onBeginDrawText()
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{
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m_aCompleteTextRect.SetEmpty();
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}
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Rectangle onEndDrawText()
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{
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return m_aCompleteTextRect;
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}
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private:
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OutputDevice& m_rTargetDevice;
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OutputDevice& m_rReferenceDevice;
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Font m_aUnzoomedPointFont;
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const Fraction m_aZoom;
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Rectangle m_aCompleteTextRect;
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};
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//====================================================================
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//= ControlTextRenderer
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//====================================================================
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ReferenceDeviceTextLayout::ReferenceDeviceTextLayout( const Control& _rControl, OutputDevice& _rTargetDevice, OutputDevice& _rReferenceDevice )
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:m_rTargetDevice( _rTargetDevice )
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,m_rReferenceDevice( _rReferenceDevice )
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,m_aUnzoomedPointFont( _rControl.GetUnzoomedControlPointFont() )
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,m_aZoom( _rControl.GetZoom() )
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{
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if ( IsZoom() )
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{
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m_rTargetDevice.Push( PUSH_MAPMODE | PUSH_FONT );
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MapMode aDrawMapMode( m_rTargetDevice.GetMapMode() );
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aDrawMapMode.SetScaleX( m_aZoom ); // TODO: shouldn't this be "current_scale * zoom"?
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aDrawMapMode.SetScaleY( m_aZoom );
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m_rTargetDevice.SetMapMode( aDrawMapMode );
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MapUnit eTargetMapUnit = m_rTargetDevice.GetMapMode().GetMapUnit();
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Font aDrawFont( m_aUnzoomedPointFont );
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if ( eTargetMapUnit == MAP_PIXEL )
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aDrawFont.SetSize( m_rTargetDevice.LogicToPixel( aDrawFont.GetSize(), MAP_POINT ) );
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else
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aDrawFont.SetSize( m_rTargetDevice.LogicToLogic( aDrawFont.GetSize(), MAP_POINT, eTargetMapUnit ) );
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_rTargetDevice.SetFont( aDrawFont );
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}
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}
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//--------------------------------------------------------------------
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namespace
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{
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//................................................................
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bool lcl_normalizeLength( const XubString& _rText, const xub_StrLen _nStartIndex, xub_StrLen& _io_nLength )
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{
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xub_StrLen nTextLength = _rText.Len();
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if ( _nStartIndex > nTextLength )
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return false;
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if ( _nStartIndex + _io_nLength > nTextLength )
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_io_nLength = nTextLength - _nStartIndex;
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return true;
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}
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//................................................................
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class DeviceUnitMapping
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{
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public:
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DeviceUnitMapping( const OutputDevice& _rTargetDevice, const OutputDevice& _rReferenceDevice )
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:m_rTargetDevice( _rTargetDevice )
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,m_eTargetMapUnit( _rTargetDevice.GetMapMode().GetMapUnit() )
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,m_bTargetIsPixel( _rTargetDevice.GetMapMode().GetMapUnit() == MAP_PIXEL )
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,m_eRefMapUnit( _rReferenceDevice.GetMapMode().GetMapUnit() )
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{
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OSL_ENSURE( m_eRefMapUnit != MAP_PIXEL, "a reference device with MAP_PIXEL?" );
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}
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long mapToTarget( long _nWidth )
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{
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return m_bTargetIsPixel
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? m_rTargetDevice.LogicToPixel( Size( _nWidth, 0 ), m_eRefMapUnit ).Width()
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: m_rTargetDevice.LogicToLogic( Size( _nWidth, 0 ), m_eRefMapUnit, m_eTargetMapUnit ).Width();
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}
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private:
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const OutputDevice& m_rTargetDevice;
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const MapUnit m_eTargetMapUnit;
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const bool m_bTargetIsPixel;
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const MapUnit m_eRefMapUnit;
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};
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}
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//--------------------------------------------------------------------
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ReferenceDeviceTextLayout::~ReferenceDeviceTextLayout()
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{
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if ( IsZoom() )
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m_rTargetDevice.Pop();
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}
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//--------------------------------------------------------------------
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bool ReferenceDeviceTextLayout::IsZoom() const
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{
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return m_aZoom.GetNumerator() != m_aZoom.GetDenominator();
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}
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//--------------------------------------------------------------------
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long ReferenceDeviceTextLayout::GetTextArray( const XubString& _rText, sal_Int32* _pDXAry, xub_StrLen _nStartIndex, xub_StrLen _nLength ) const
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{
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if ( !lcl_normalizeLength( _rText, _nStartIndex, _nLength ) )
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return 0;
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// transfer font to the reference device
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m_rReferenceDevice.Push( PUSH_FONT );
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Font aRefFont( m_aUnzoomedPointFont );
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aRefFont.SetSize( OutputDevice::LogicToLogic(
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aRefFont.GetSize(), MAP_POINT, m_rReferenceDevice.GetMapMode().GetMapUnit() ) );
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m_rReferenceDevice.SetFont( aRefFont );
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// retrieve the character widths from the reference device
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long nTextWidth = m_rReferenceDevice.GetTextArray( _rText, _pDXAry, _nStartIndex, _nLength );
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m_rReferenceDevice.Pop();
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// adjust the widths, which are in ref-device units, to the target device
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DeviceUnitMapping aMapping( m_rTargetDevice, m_rReferenceDevice );
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if ( _pDXAry )
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{
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for ( size_t i=0; i<_nLength; ++i )
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_pDXAry[i] = aMapping.mapToTarget( _pDXAry[i] );
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}
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nTextWidth = aMapping.mapToTarget( nTextWidth );
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return nTextWidth;
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}
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//--------------------------------------------------------------------
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long ReferenceDeviceTextLayout::GetTextWidth( const XubString& _rText, xub_StrLen _nStartIndex, xub_StrLen _nLength ) const
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{
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return GetTextArray( _rText, NULL, _nStartIndex, _nLength );
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}
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//--------------------------------------------------------------------
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void ReferenceDeviceTextLayout::DrawText( const Point& _rStartPoint, const XubString& _rText, xub_StrLen _nStartIndex, xub_StrLen _nLength, MetricVector* _pVector, String* _pDisplayText )
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{
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if ( !lcl_normalizeLength( _rText, _nStartIndex, _nLength ) )
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return;
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sal_Int32* pCharWidths = new sal_Int32[ _nLength ];
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long nTextWidth = GetTextArray( _rText, pCharWidths, _nStartIndex, _nLength );
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m_rTargetDevice.DrawTextArray( _rStartPoint, _rText, pCharWidths, _nStartIndex, _nLength );
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delete[] pCharWidths;
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m_aCompleteTextRect.Union( Rectangle( _rStartPoint, Size( nTextWidth, m_rTargetDevice.GetTextHeight() ) ) );
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// TODO: use/fill those:
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(void)_pVector;
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(void)_pDisplayText;
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}
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//--------------------------------------------------------------------
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Rectangle ReferenceDeviceTextLayout::DrawText( const Rectangle& _rRect, const XubString& _rText, USHORT _nStyle, MetricVector* _pVector, String* _pDisplayText)
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{
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Rectangle aRect( _rRect );
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if ( IsZoom() )
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{
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// if there's a zoom factor involved, then we tampered with the target device's map mode in the ctor.
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// Need to adjust the rectangle to this
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aRect.Left() = long( aRect.Left() / (double)m_aZoom );
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aRect.Right() = long( aRect.Right() / (double)m_aZoom );
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aRect.Top() = long( aRect.Top() / (double)m_aZoom );
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aRect.Bottom() = long( aRect.Bottom() / (double)m_aZoom );
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}
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onBeginDrawText();
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m_rTargetDevice.DrawText( aRect, _rText, _nStyle, _pVector, _pDisplayText, this );
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Rectangle aTextRect = onEndDrawText();
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if ( IsZoom() )
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{
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// similar to above, transform the to-be-returned rectanle to coordinates which are meaningful
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// with the original map mode of the target device
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aTextRect.Left() = long( aTextRect.Left() * (double)m_aZoom );
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aTextRect.Right() = long( aTextRect.Right() * (double)m_aZoom );
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aTextRect.Top() = long( aTextRect.Top() * (double)m_aZoom );
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aTextRect.Bottom() = long( aTextRect.Bottom() * (double)m_aZoom );
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}
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return aTextRect;
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}
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//====================================================================
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//= ControlTextRenderer
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//====================================================================
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//--------------------------------------------------------------------
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ControlTextRenderer::ControlTextRenderer( const Control& _rControl, OutputDevice& _rTargetDevice, OutputDevice& _rReferenceDevice )
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:m_pImpl( new ReferenceDeviceTextLayout( _rControl, _rTargetDevice, _rReferenceDevice ) )
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{
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}
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//--------------------------------------------------------------------
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ControlTextRenderer::~ControlTextRenderer()
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{
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}
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//--------------------------------------------------------------------
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Rectangle ControlTextRenderer::DrawText( const Rectangle& _rRect, const XubString& _rText, USHORT _nStyle,
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MetricVector* _pVector, String* _pDisplayText )
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{
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return m_pImpl->DrawText( _rRect, _rText, _nStyle, _pVector, _pDisplayText );
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}
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//........................................................................
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} // namespace vcl
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//........................................................................
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