318 lines
12 KiB
C++
318 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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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 <tools/gen.hxx>
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#include <com/sun/star/i18n/ScriptType.hpp>
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#include <com/sun/star/i18n/XBreakIterator.hpp>
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using namespace ::com::sun::star;
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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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vcl::Font maLatinFont; /// The font for latin text portions.
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vcl::Font maAsianFont; /// The font for asian text portions.
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vcl::Font maCmplxFont; /// The font for complex text portions.
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vcl::Font maDefltFont; /// The default font of the output device.
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OUString maText; /// The text.
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std::vector< sal_Int32 > maPosVec; /// The start position of each text portion.
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std::vector< sal_Int16 > maScriptVec; /// The script type of each text portion.
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std::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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/** Gets the font of the given script type. */
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const vcl::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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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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explicit SvtScriptedTextHelper_Impl(
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OutputDevice& _rOutDevice );
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/** Sets new fonts and recalculates the text width. */
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void SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _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 { return maTextSize;}
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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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mrOutDevice( _rOutDevice ),
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maLatinFont( _rOutDevice.GetFont() ),
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maAsianFont( _rOutDevice.GetFont() ),
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maCmplxFont( _rOutDevice.GetFont() ),
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maDefltFont( _rOutDevice.GetFont() )
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{
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}
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const vcl::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.setWidth(0);
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maTextSize.setHeight(0);
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mrOutDevice.Push(vcl::PushFlags::FONT | vcl::PushFlags::TEXTCOLOR);
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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 std::vectors" );
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sal_Int32 nThisPos = maPosVec[ 0 ];
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sal_Int32 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 = 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.AdjustWidth(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.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) );
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SetOutDevFont( i18n::ScriptType::ASIAN );
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maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) );
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SetOutDevFont( i18n::ScriptType::COMPLEX );
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maTextSize.setHeight( std::max( maTextSize.Height(), mrOutDevice.GetTextHeight() ) );
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mrOutDevice.Pop();
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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, nCharIx, 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 && nCharIx != -1 );
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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( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _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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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 std::vectors" );
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DBG_ASSERT( maScriptVec.size() == maWidthVec.size(), "SvtScriptedTextHelper_Impl::DrawText - invalid std::vectors" );
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mrOutDevice.Push(vcl::PushFlags::FONT | vcl::PushFlags::TEXTCOLOR);
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Point aCurrPos( _rPos );
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sal_Int32 nThisPos = maPosVec[ 0 ];
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sal_Int32 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 = maPosVec[ nPosVecIndex++ ];
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nScript = maScriptVec[ nVecIndex ];
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vcl::Font aFont = GetFont( nScript );
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mrOutDevice.SetFont( aFont );
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if (aFont.GetColor() == COL_AUTO)
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mrOutDevice.SetTextColor( mrOutDevice.GetFillColor().IsDark() ? COL_WHITE : COL_BLACK);
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mrOutDevice.DrawText( aCurrPos, maText, nThisPos, nNextPos - nThisPos );
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aCurrPos.AdjustX(maWidthVec[ nVecIndex++ ] );
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aCurrPos.AdjustX(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.Pop();
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}
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SvtScriptedTextHelper::SvtScriptedTextHelper( OutputDevice& _rOutDevice ) :
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mpImpl( new SvtScriptedTextHelper_Impl( _rOutDevice ) )
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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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}
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void SvtScriptedTextHelper::SetFonts( vcl::Font const * _pLatinFont, vcl::Font const * _pAsianFont, vcl::Font const * _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( nullptr, nullptr, nullptr );
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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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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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