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Diffstat (limited to '')
| -rw-r--r-- | svtools/source/control/scriptedtext.cxx | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/svtools/source/control/scriptedtext.cxx b/svtools/source/control/scriptedtext.cxx new file mode 100644 index 000000000..4c7155dea --- /dev/null +++ b/svtools/source/control/scriptedtext.cxx @@ -0,0 +1,317 @@ +/* -*- 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 . + */ + +#include <svtools/scriptedtext.hxx> +#include <vector> +#include <rtl/ustring.hxx> +#include <vcl/outdev.hxx> +#include <vcl/font.hxx> +#include <tools/debug.hxx> +#include <tools/gen.hxx> +#include <com/sun/star/i18n/ScriptType.hpp> +#include <com/sun/star/i18n/XBreakIterator.hpp> + + +using namespace ::std; +using namespace ::com::sun::star; + + +class SvtScriptedTextHelper_Impl +{ +private: + OutputDevice& mrOutDevice; /// The output device for drawing the text. + vcl::Font maLatinFont; /// The font for latin text portions. + vcl::Font maAsianFont; /// The font for asian text portions. + vcl::Font maCmplxFont; /// The font for complex text portions. + vcl::Font maDefltFont; /// The default font of the output device. + OUString maText; /// The text. + + vector< sal_Int32 > maPosVec; /// The start position of each text portion. + vector< sal_Int16 > maScriptVec; /// The script type of each text portion. + vector< sal_Int32 > maWidthVec; /// The output width of each text portion. + Size maTextSize; /// The size the text will take in the current output device. + + /** Gets the font of the given script type. */ + const vcl::Font& GetFont( sal_uInt16 _nScript ) const; + /** Sets a font on the output device depending on the script type. */ + void SetOutDevFont( sal_uInt16 _nScript ) + { mrOutDevice.SetFont( GetFont( _nScript ) ); } + /** Fills maPosVec with positions of all changes of script type. + This method expects correctly initialized maPosVec and maScriptVec. */ + void CalculateSizes(); + /** Fills maPosVec with positions of all changes of script type and + maScriptVec with the script type of each portion. */ + void CalculateBreaks( + const uno::Reference< i18n::XBreakIterator >& _xBreakIter ); + +public: + /** This constructor sets an output device and fonts for all script types. */ + explicit SvtScriptedTextHelper_Impl( + OutputDevice& _rOutDevice ); + + /** Sets new fonts and recalculates the text width. */ + void SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _pCmplxFont ); + /** Sets a new text and calculates all script breaks and the text width. */ + void SetText( + const OUString& _rText, + const uno::Reference< i18n::XBreakIterator >& _xBreakIter ); + + /** Returns a size struct containing the width and height of the text in the current output device. */ + const Size& GetTextSize() const { return maTextSize;} + + /** Draws the text in the current output device. */ + void DrawText( const Point& _rPos ); +}; + + +SvtScriptedTextHelper_Impl::SvtScriptedTextHelper_Impl( + OutputDevice& _rOutDevice ) : + mrOutDevice( _rOutDevice ), + maLatinFont( _rOutDevice.GetFont() ), + maAsianFont( _rOutDevice.GetFont() ), + maCmplxFont( _rOutDevice.GetFont() ), + maDefltFont( _rOutDevice.GetFont() ) +{ +} + +const vcl::Font& SvtScriptedTextHelper_Impl::GetFont( sal_uInt16 _nScript ) const +{ + switch( _nScript ) + { + case i18n::ScriptType::LATIN: return maLatinFont; + case i18n::ScriptType::ASIAN: return maAsianFont; + case i18n::ScriptType::COMPLEX: return maCmplxFont; + } + return maDefltFont; +} + +void SvtScriptedTextHelper_Impl::CalculateSizes() +{ + maTextSize.setWidth(0); + maTextSize.setHeight(0); + mrOutDevice.Push(PushFlags::FONT | PushFlags::TEXTCOLOR); + + // calculate text portion widths and total width + maWidthVec.clear(); + if( !maPosVec.empty() ) + { + DBG_ASSERT( maPosVec.size() - 1 == maScriptVec.size(), + "SvtScriptedTextHelper_Impl::CalculateWidth - invalid vectors" ); + + sal_Int32 nThisPos = maPosVec[ 0 ]; + sal_Int32 nNextPos; + sal_Int32 nPosVecSize = maPosVec.size(); + sal_Int32 nPosVecIndex = 1; + + sal_Int16 nScript; + sal_Int32 nScriptVecIndex = 0; + + sal_Int32 nCurrWidth; + + while( nPosVecIndex < nPosVecSize ) + { + nNextPos = maPosVec[ nPosVecIndex++ ]; + nScript = maScriptVec[ nScriptVecIndex++ ]; + + SetOutDevFont( nScript ); + nCurrWidth = mrOutDevice.GetTextWidth( maText, nThisPos, nNextPos - nThisPos ); + maWidthVec.push_back( nCurrWidth ); + maTextSize.AdjustWidth(nCurrWidth ); + nThisPos = nNextPos; + } + } + + // calculate maximum font height + SetOutDevFont( i18n::ScriptType::LATIN ); + maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) ); + SetOutDevFont( i18n::ScriptType::ASIAN ); + maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) ); + SetOutDevFont( i18n::ScriptType::COMPLEX ); + maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) ); + + mrOutDevice.Pop(); +} + +void SvtScriptedTextHelper_Impl::CalculateBreaks( const uno::Reference< i18n::XBreakIterator >& _xBreakIter ) +{ + maPosVec.clear(); + maScriptVec.clear(); + + DBG_ASSERT( _xBreakIter.is(), "SvtScriptedTextHelper_Impl::CalculateBreaks - no break iterator" ); + + sal_Int32 nLen = maText.getLength(); + if( nLen ) + { + if( _xBreakIter.is() ) + { + sal_Int32 nThisPos = 0; // first position of this portion + sal_Int32 nNextPos = 0; // first position of next portion + sal_Int16 nPortScript; // script type of this portion + do + { + nPortScript = _xBreakIter->getScriptType( maText, nThisPos ); + nNextPos = _xBreakIter->endOfScript( maText, nThisPos, nPortScript ); + + switch( nPortScript ) + { + case i18n::ScriptType::LATIN: + case i18n::ScriptType::ASIAN: + case i18n::ScriptType::COMPLEX: + maPosVec.push_back( nThisPos ); + maScriptVec.push_back( nPortScript ); + break; + default: + { +/* *** handling of weak characters *** +- first portion is weak: Use OutputDevice::HasGlyphs() to find the correct font +- weak portion follows another portion: Script type of preceding portion is used */ + if( maPosVec.empty() ) + { + sal_Int32 nCharIx = 0; + sal_Int32 nNextCharIx = 0; + sal_Int16 nScript; + do + { + nScript = i18n::ScriptType::LATIN; + while( (nScript != i18n::ScriptType::WEAK) && (nCharIx == nNextCharIx) ) + { + nNextCharIx = mrOutDevice.HasGlyphs( GetFont( nScript ), maText, nCharIx, nNextPos - nCharIx ); + if( nCharIx == nNextCharIx ) + ++nScript; + } + if( nNextCharIx == nCharIx ) + ++nNextCharIx; + + maPosVec.push_back( nCharIx ); + maScriptVec.push_back( nScript ); + nCharIx = nNextCharIx; + } + while( nCharIx < nNextPos && nCharIx != -1 ); + } + // nothing to do for following portions + } + } + nThisPos = nNextPos; + } + while( (0 <= nThisPos) && (nThisPos < nLen) ); + } + else // no break iterator: whole text LATIN + { + maPosVec.push_back( 0 ); + maScriptVec.push_back( i18n::ScriptType::LATIN ); + } + + // push end position of last portion + if( !maPosVec.empty() ) + maPosVec.push_back( nLen ); + } + CalculateSizes(); +} + +void SvtScriptedTextHelper_Impl::SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _pCmplxFont ) +{ + maLatinFont = _pLatinFont ? *_pLatinFont : maDefltFont; + maAsianFont = _pAsianFont ? *_pAsianFont : maDefltFont; + maCmplxFont = _pCmplxFont ? *_pCmplxFont : maDefltFont; + CalculateSizes(); +} + +void SvtScriptedTextHelper_Impl::SetText( const OUString& _rText, const uno::Reference< i18n::XBreakIterator >& _xBreakIter ) +{ + maText = _rText; + CalculateBreaks( _xBreakIter ); +} + + +void SvtScriptedTextHelper_Impl::DrawText( const Point& _rPos ) +{ + if( maText.isEmpty() || maPosVec.empty() ) + return; + + DBG_ASSERT( maPosVec.size() - 1 == maScriptVec.size(), "SvtScriptedTextHelper_Impl::DrawText - invalid vectors" ); + DBG_ASSERT( maScriptVec.size() == maWidthVec.size(), "SvtScriptedTextHelper_Impl::DrawText - invalid vectors" ); + + mrOutDevice.Push(PushFlags::FONT | PushFlags::TEXTCOLOR); + + Point aCurrPos( _rPos ); + sal_Int32 nThisPos = maPosVec[ 0 ]; + sal_Int32 nNextPos; + sal_Int32 nPosVecSize = maPosVec.size(); + sal_Int32 nPosVecIndex = 1; + + sal_Int16 nScript; + sal_Int32 nVecIndex = 0; + + while( nPosVecIndex < nPosVecSize ) + { + nNextPos = maPosVec[ nPosVecIndex++ ]; + nScript = maScriptVec[ nVecIndex ]; + + SetOutDevFont( nScript ); + mrOutDevice.DrawText( aCurrPos, maText, nThisPos, nNextPos - nThisPos ); + aCurrPos.AdjustX(maWidthVec[ nVecIndex++ ] ); + aCurrPos.AdjustX(mrOutDevice.GetTextHeight() / 5 ); // add 20% of font height as portion spacing + nThisPos = nNextPos; + } + + mrOutDevice.Pop(); +} + + +SvtScriptedTextHelper::SvtScriptedTextHelper( OutputDevice& _rOutDevice ) : + mpImpl( new SvtScriptedTextHelper_Impl( _rOutDevice ) ) +{ +} + +SvtScriptedTextHelper::SvtScriptedTextHelper( const SvtScriptedTextHelper& _rCopy ) : + mpImpl( new SvtScriptedTextHelper_Impl( *_rCopy.mpImpl ) ) +{ +} + +SvtScriptedTextHelper::~SvtScriptedTextHelper() +{ +} + +void SvtScriptedTextHelper::SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _pCmplxFont ) +{ + mpImpl->SetFonts( _pLatinFont, _pAsianFont, _pCmplxFont ); +} + +void SvtScriptedTextHelper::SetDefaultFont() +{ + mpImpl->SetFonts( nullptr, nullptr, nullptr ); +} + +void SvtScriptedTextHelper::SetText( const OUString& _rText, const uno::Reference< i18n::XBreakIterator >& _xBreakIter ) +{ + mpImpl->SetText( _rText, _xBreakIter ); +} + +const Size& SvtScriptedTextHelper::GetTextSize() const +{ + return mpImpl->GetTextSize(); +} + +void SvtScriptedTextHelper::DrawText( const Point& _rPos ) +{ + mpImpl->DrawText( _rPos ); +} + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |