363 lines
14 KiB
C++
363 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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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 2000, 2010 Oracle and/or its affiliates.
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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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************************************************************************/
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#include <svtools/scriptedtext.hxx>
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#include <vector>
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#include <rtl/ustring.hxx>
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#include <vcl/outdev.hxx>
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#include <vcl/font.hxx>
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#include <tools/debug.hxx>
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#include <com/sun/star/i18n/ScriptType.hpp>
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using namespace ::std;
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using namespace ::rtl;
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using namespace ::com::sun::star;
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//_____________________________________________________________________________
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class SvtScriptedTextHelper_Impl
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{
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private:
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OutputDevice& mrOutDevice; /// The output device for drawing the text.
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Font maLatinFont; /// The font for latin text portions.
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Font maAsianFont; /// The font for asian text portions.
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Font maCmplxFont; /// The font for complex text portions.
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Font maDefltFont; /// The default font of the output device.
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OUString maText; /// The text.
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vector< sal_Int32 > maPosVec; /// The start position of each text portion.
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vector< sal_Int16 > maScriptVec; /// The script type of each text portion.
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vector< sal_Int32 > maWidthVec; /// The output width of each text portion.
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Size maTextSize; /// The size the text will take in the current output device.
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/** Assignment operator not implemented to prevent usage. */
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SvtScriptedTextHelper_Impl& operator=( const SvtScriptedTextHelper_Impl& );
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/** Gets the font of the given script type. */
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const Font& GetFont( sal_uInt16 _nScript ) const;
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/** Sets a font on the output device depending on the script type. */
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inline void SetOutDevFont( sal_uInt16 _nScript )
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{ mrOutDevice.SetFont( GetFont( _nScript ) ); }
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/** Fills maPosVec with positions of all changes of script type.
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This method expects correctly initialized maPosVec and maScriptVec. */
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void CalculateSizes();
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/** Fills maPosVec with positions of all changes of script type and
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maScriptVec with the script type of each portion. */
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void CalculateBreaks(
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const uno::Reference< i18n::XBreakIterator >& _xBreakIter );
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public:
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/** This constructor sets an output device and fonts for all script types. */
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SvtScriptedTextHelper_Impl(
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OutputDevice& _rOutDevice,
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Font* _pLatinFont,
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Font* _pAsianFont,
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Font* _pCmplxFont );
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/** Copy constructor. */
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SvtScriptedTextHelper_Impl(
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const SvtScriptedTextHelper_Impl& _rCopy );
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/** Destructor. */
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~SvtScriptedTextHelper_Impl();
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/** Sets new fonts and recalculates the text width. */
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void SetFonts( Font* _pLatinFont, Font* _pAsianFont, Font* _pCmplxFont );
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/** Sets a new text and calculates all script breaks and the text width. */
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void SetText(
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const OUString& _rText,
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const uno::Reference< i18n::XBreakIterator >& _xBreakIter );
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/** Returns a size struct containing the width and height of the text in the current output device. */
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const Size& GetTextSize() const;
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/** Draws the text in the current output device. */
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void DrawText( const Point& _rPos );
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};
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SvtScriptedTextHelper_Impl::SvtScriptedTextHelper_Impl(
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OutputDevice& _rOutDevice,
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Font* _pLatinFont, Font* _pAsianFont, Font* _pCmplxFont ) :
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mrOutDevice( _rOutDevice ),
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maLatinFont( _pLatinFont ? *_pLatinFont : _rOutDevice.GetFont() ),
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maAsianFont( _pAsianFont ? *_pAsianFont : _rOutDevice.GetFont() ),
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maCmplxFont( _pCmplxFont ? *_pCmplxFont : _rOutDevice.GetFont() ),
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maDefltFont( _rOutDevice.GetFont() )
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{
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}
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SvtScriptedTextHelper_Impl::SvtScriptedTextHelper_Impl( const SvtScriptedTextHelper_Impl& _rCopy ) :
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mrOutDevice( _rCopy.mrOutDevice ),
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maLatinFont( _rCopy.maLatinFont ),
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maAsianFont( _rCopy.maAsianFont ),
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maCmplxFont( _rCopy.maCmplxFont ),
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maDefltFont( _rCopy.maDefltFont ),
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maText( _rCopy.maText ),
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maPosVec( _rCopy.maPosVec ),
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maScriptVec( _rCopy.maScriptVec ),
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maWidthVec( _rCopy.maWidthVec ),
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maTextSize( _rCopy.maTextSize )
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{
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}
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SvtScriptedTextHelper_Impl::~SvtScriptedTextHelper_Impl()
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{
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}
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const Font& SvtScriptedTextHelper_Impl::GetFont( sal_uInt16 _nScript ) const
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{
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switch( _nScript )
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{
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case i18n::ScriptType::LATIN: return maLatinFont;
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case i18n::ScriptType::ASIAN: return maAsianFont;
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case i18n::ScriptType::COMPLEX: return maCmplxFont;
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}
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return maDefltFont;
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}
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void SvtScriptedTextHelper_Impl::CalculateSizes()
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{
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maTextSize.Width() = maTextSize.Height() = 0;
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maDefltFont = mrOutDevice.GetFont();
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// calculate text portion widths and total width
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maWidthVec.clear();
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if( !maPosVec.empty() )
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{
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DBG_ASSERT( maPosVec.size() - 1 == maScriptVec.size(),
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"SvtScriptedTextHelper_Impl::CalculateWidth - invalid vectors" );
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xub_StrLen nThisPos = static_cast< xub_StrLen >( maPosVec[ 0 ] );
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xub_StrLen nNextPos;
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sal_Int32 nPosVecSize = maPosVec.size();
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sal_Int32 nPosVecIndex = 1;
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sal_Int16 nScript;
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sal_Int32 nScriptVecIndex = 0;
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sal_Int32 nCurrWidth;
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while( nPosVecIndex < nPosVecSize )
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{
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nNextPos = static_cast< xub_StrLen >( maPosVec[ nPosVecIndex++ ] );
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nScript = maScriptVec[ nScriptVecIndex++ ];
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SetOutDevFont( nScript );
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nCurrWidth = mrOutDevice.GetTextWidth( maText, nThisPos, nNextPos - nThisPos );
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maWidthVec.push_back( nCurrWidth );
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maTextSize.Width() += nCurrWidth;
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nThisPos = nNextPos;
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}
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}
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// calculate maximum font height
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SetOutDevFont( i18n::ScriptType::LATIN );
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maTextSize.Height() = Max( maTextSize.Height(), mrOutDevice.GetTextHeight() );
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SetOutDevFont( i18n::ScriptType::ASIAN );
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maTextSize.Height() = Max( maTextSize.Height(), mrOutDevice.GetTextHeight() );
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SetOutDevFont( i18n::ScriptType::COMPLEX );
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maTextSize.Height() = Max( maTextSize.Height(), mrOutDevice.GetTextHeight() );
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mrOutDevice.SetFont( maDefltFont );
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}
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void SvtScriptedTextHelper_Impl::CalculateBreaks( const uno::Reference< i18n::XBreakIterator >& _xBreakIter )
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{
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maPosVec.clear();
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maScriptVec.clear();
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DBG_ASSERT( _xBreakIter.is(), "SvtScriptedTextHelper_Impl::CalculateBreaks - no break iterator" );
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sal_Int32 nLen = maText.getLength();
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if( nLen )
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{
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if( _xBreakIter.is() )
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{
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sal_Int32 nThisPos = 0; // first position of this portion
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sal_Int32 nNextPos = 0; // first position of next portion
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sal_Int16 nPortScript; // script type of this portion
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do
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{
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nPortScript = _xBreakIter->getScriptType( maText, nThisPos );
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nNextPos = _xBreakIter->endOfScript( maText, nThisPos, nPortScript );
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switch( nPortScript )
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{
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case i18n::ScriptType::LATIN:
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case i18n::ScriptType::ASIAN:
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case i18n::ScriptType::COMPLEX:
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maPosVec.push_back( nThisPos );
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maScriptVec.push_back( nPortScript );
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break;
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default:
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{
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/* *** handling of weak characters ***
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- first portion is weak: Use OutputDevice::HasGlyphs() to find the correct font
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- weak portion follows another portion: Script type of preceding portion is used */
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if( maPosVec.empty() )
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{
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sal_Int32 nCharIx = 0;
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sal_Int32 nNextCharIx = 0;
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sal_Int16 nScript;
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do
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{
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nScript = i18n::ScriptType::LATIN;
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while( (nScript != i18n::ScriptType::WEAK) && (nCharIx == nNextCharIx) )
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{
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nNextCharIx = mrOutDevice.HasGlyphs( GetFont( nScript ), maText, sal::static_int_cast< sal_uInt16 >(nCharIx), sal::static_int_cast< sal_uInt16 >(nNextPos - nCharIx) );
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if( nCharIx == nNextCharIx )
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++nScript;
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}
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if( nNextCharIx == nCharIx )
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++nNextCharIx;
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maPosVec.push_back( nCharIx );
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maScriptVec.push_back( nScript );
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nCharIx = nNextCharIx;
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}
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while( nCharIx < nNextPos );
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}
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// nothing to do for following portions
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}
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}
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nThisPos = nNextPos;
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}
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while( (0 <= nThisPos) && (nThisPos < nLen) );
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}
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else // no break iterator: whole text LATIN
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{
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maPosVec.push_back( 0 );
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maScriptVec.push_back( i18n::ScriptType::LATIN );
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}
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// push end position of last portion
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if( !maPosVec.empty() )
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maPosVec.push_back( nLen );
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}
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CalculateSizes();
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}
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void SvtScriptedTextHelper_Impl::SetFonts( Font* _pLatinFont, Font* _pAsianFont, Font* _pCmplxFont )
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{
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maLatinFont = _pLatinFont ? *_pLatinFont : maDefltFont;
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maAsianFont = _pAsianFont ? *_pAsianFont : maDefltFont;
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maCmplxFont = _pCmplxFont ? *_pCmplxFont : maDefltFont;
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CalculateSizes();
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}
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void SvtScriptedTextHelper_Impl::SetText( const OUString& _rText, const uno::Reference< i18n::XBreakIterator >& _xBreakIter )
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{
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maText = _rText;
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CalculateBreaks( _xBreakIter );
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}
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const Size& SvtScriptedTextHelper_Impl::GetTextSize() const
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{
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return maTextSize;
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}
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void SvtScriptedTextHelper_Impl::DrawText( const Point& _rPos )
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{
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if( maText.isEmpty() || maPosVec.empty() )
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return;
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DBG_ASSERT( maPosVec.size() - 1 == maScriptVec.size(), "SvtScriptedTextHelper_Impl::DrawText - invalid vectors" );
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DBG_ASSERT( maScriptVec.size() == maWidthVec.size(), "SvtScriptedTextHelper_Impl::DrawText - invalid vectors" );
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maDefltFont = mrOutDevice.GetFont();
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Point aCurrPos( _rPos );
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xub_StrLen nThisPos = static_cast< xub_StrLen >( maPosVec[ 0 ] );
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xub_StrLen nNextPos;
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sal_Int32 nPosVecSize = maPosVec.size();
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sal_Int32 nPosVecIndex = 1;
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sal_Int16 nScript;
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sal_Int32 nVecIndex = 0;
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while( nPosVecIndex < nPosVecSize )
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{
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nNextPos = static_cast< xub_StrLen >( maPosVec[ nPosVecIndex++ ] );
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nScript = maScriptVec[ nVecIndex ];
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SetOutDevFont( nScript );
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mrOutDevice.DrawText( aCurrPos, maText, nThisPos, nNextPos - nThisPos );
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aCurrPos.X() += maWidthVec[ nVecIndex++ ];
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aCurrPos.X() += mrOutDevice.GetTextHeight() / 5; // add 20% of font height as portion spacing
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nThisPos = nNextPos;
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}
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mrOutDevice.SetFont( maDefltFont );
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}
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//_____________________________________________________________________________
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SvtScriptedTextHelper::SvtScriptedTextHelper( OutputDevice& _rOutDevice ) :
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mpImpl( new SvtScriptedTextHelper_Impl( _rOutDevice, NULL, NULL, NULL ) )
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{
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}
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SvtScriptedTextHelper::SvtScriptedTextHelper( const SvtScriptedTextHelper& _rCopy ) :
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mpImpl( new SvtScriptedTextHelper_Impl( *_rCopy.mpImpl ) )
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{
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}
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SvtScriptedTextHelper::~SvtScriptedTextHelper()
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{
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delete mpImpl;
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}
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void SvtScriptedTextHelper::SetFonts( Font* _pLatinFont, Font* _pAsianFont, Font* _pCmplxFont )
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{
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mpImpl->SetFonts( _pLatinFont, _pAsianFont, _pCmplxFont );
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}
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void SvtScriptedTextHelper::SetDefaultFont()
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{
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mpImpl->SetFonts( NULL, NULL, NULL );
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}
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void SvtScriptedTextHelper::SetText( const OUString& _rText, const uno::Reference< i18n::XBreakIterator >& _xBreakIter )
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{
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mpImpl->SetText( _rText, _xBreakIter );
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}
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const Size& SvtScriptedTextHelper::GetTextSize() const
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{
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return mpImpl->GetTextSize();
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}
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void SvtScriptedTextHelper::DrawText( const Point& _rPos )
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{
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mpImpl->DrawText( _rPos );
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}
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//_____________________________________________________________________________
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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