drawinglayer/source/primitive2d/textbreakuphelper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <drawinglayer/primitive2d/textbreakuphelper.hxx>
  21 #include <drawinglayer/primitive2d/textdecoratedprimitive2d.hxx>
  22 #include <com/sun/star/i18n/BreakIterator.hpp>
  23 #include <comphelper/processfactory.hxx>
  24 #include <com/sun/star/i18n/CharacterIteratorMode.hpp>
  25 #include <com/sun/star/i18n/WordType.hpp>
  26 #include <com/sun/star/i18n/CharType.hpp>
  27
  28
  29 namespace drawinglayer
  30 {
  31     namespace primitive2d
  32     {
  33         TextBreakupHelper::TextBreakupHelper(const TextSimplePortionPrimitive2D& rSource)
  34         :   mrSource(rSource),
  35             mxResult(),
  36             maTextLayouter(),
  37             maDecTrans(),
  38             mbNoDXArray(false)
  39         {
  40             maDecTrans = mrSource.getTextTransform();
  41             mbNoDXArray = mrSource.getDXArray().empty();
  42
  43             if(mbNoDXArray)
  44             {
  45                 // init TextLayouter when no dxarray
  46                 maTextLayouter.setFontAttribute(
  47                     mrSource.getFontAttribute(),
  48                     maDecTrans.getScale().getX(),
  49                     maDecTrans.getScale().getY(),
  50                     mrSource.getLocale());
  51             }
  52         }
  53
  54         TextBreakupHelper::~TextBreakupHelper()
  55         {
  56         }
  57
  58         void TextBreakupHelper::breakupPortion(Primitive2DContainer& rTempResult, sal_Int32 nIndex, sal_Int32 nLength, bool bWordLineMode)
  59         {
  60             if(nLength && !(nIndex == mrSource.getTextPosition() && nLength == mrSource.getTextLength()))
  61             {
  62                 // prepare values for new portion
  63                 basegfx::B2DHomMatrix aNewTransform;
  64                 std::vector< double > aNewDXArray;
  65                 const bool bNewStartIsNotOldStart(nIndex > mrSource.getTextPosition());
  66
  67                 if(!mbNoDXArray)
  68                 {
  69                     // prepare new DXArray for the single word
  70                     aNewDXArray = std::vector< double >(
  71                         mrSource.getDXArray().begin() + (nIndex - mrSource.getTextPosition()),
  72                         mrSource.getDXArray().begin() + ((nIndex + nLength) - mrSource.getTextPosition()));
  73                 }
  74
  75                 if(bNewStartIsNotOldStart)
  76                 {
  77                     // needs to be moved to a new start position
  78                     double fOffset(0.0);
  79
  80                     if(mbNoDXArray)
  81                     {
  82                         // evaluate using TextLayouter
  83                         fOffset = maTextLayouter.getTextWidth(mrSource.getText(), mrSource.getTextPosition(), nIndex);
  84                     }
  85                     else
  86                     {
  87                         // get from DXArray
  88                         const sal_Int32 nIndex2(nIndex - mrSource.getTextPosition());
  89                         fOffset = mrSource.getDXArray()[nIndex2 - 1];
  90                     }
  91
  92                     // need offset without FontScale for building the new transformation. The
  93                     // new transformation will be multiplied with the current text transformation
  94                     // so FontScale would be double
  95                     double fOffsetNoScale(fOffset);
  96                     const double fFontScaleX(maDecTrans.getScale().getX());
  97
  98                     if(!basegfx::fTools::equal(fFontScaleX, 1.0)
  99                         && !basegfx::fTools::equalZero(fFontScaleX))
 100                     {
 101                         fOffsetNoScale /= fFontScaleX;
 102                     }
 103
 104                     // apply needed offset to transformation
 105                     aNewTransform.translate(fOffsetNoScale, 0.0);
 106
 107                     if(!mbNoDXArray)
 108                     {
 109                         // DXArray values need to be corrected with the offset, too. Here,
 110                         // take the scaled offset since the DXArray is scaled
 111                         const sal_uInt32 nArraySize(aNewDXArray.size());
 112
 113                         for(sal_uInt32 a(0); a < nArraySize; a++)
 114                         {
 115                             aNewDXArray[a] -= fOffset;
 116                         }
 117                     }
 118                 }
 119
 120                 // add text transformation to new transformation
 121                 // coverity[swapped_arguments : FALSE] - this is in the correct order
 122                 aNewTransform *= maDecTrans.getB2DHomMatrix();
 123
 124                 // callback to allow evtl. changes
 125                 const bool bCreate(allowChange(rTempResult.size(), aNewTransform, nIndex, nLength));
 126
 127                 if(bCreate)
 128                 {
 129                     // check if we have a decorated primitive as source
 130                     const TextDecoratedPortionPrimitive2D* pTextDecoratedPortionPrimitive2D =
 131                         dynamic_cast< const TextDecoratedPortionPrimitive2D* >(&mrSource);
 132
 133                     if(pTextDecoratedPortionPrimitive2D)
 134                     {
 135                         // create a TextDecoratedPortionPrimitive2D
 136                         rTempResult.push_back(
 137                             new TextDecoratedPortionPrimitive2D(
 138                                 aNewTransform,
 139                                 mrSource.getText(),
 140                                 nIndex,
 141                                 nLength,
 142                                 aNewDXArray,
 143                                 mrSource.getFontAttribute(),
 144                                 mrSource.getLocale(),
 145                                 mrSource.getFontColor(),
 146                                 mrSource.getTextFillColor(),
 147
 148                                 pTextDecoratedPortionPrimitive2D->getOverlineColor(),
 149                                 pTextDecoratedPortionPrimitive2D->getTextlineColor(),
 150                                 pTextDecoratedPortionPrimitive2D->getFontOverline(),
 151                                 pTextDecoratedPortionPrimitive2D->getFontUnderline(),
 152                                 pTextDecoratedPortionPrimitive2D->getUnderlineAbove(),
 153                                 pTextDecoratedPortionPrimitive2D->getTextStrikeout(),
 154
 155                                 // reset WordLineMode when BreakupUnit::Word is executed; else copy original
 156                                 !bWordLineMode && pTextDecoratedPortionPrimitive2D->getWordLineMode(),
 157
 158                                 pTextDecoratedPortionPrimitive2D->getTextEmphasisMark(),
 159                                 pTextDecoratedPortionPrimitive2D->getEmphasisMarkAbove(),
 160                                 pTextDecoratedPortionPrimitive2D->getEmphasisMarkBelow(),
 161                                 pTextDecoratedPortionPrimitive2D->getTextRelief(),
 162                                 pTextDecoratedPortionPrimitive2D->getShadow()));
 163                     }
 164                     else
 165                     {
 166                         // create a SimpleTextPrimitive
 167                         rTempResult.push_back(
 168                             new TextSimplePortionPrimitive2D(
 169                                 aNewTransform,
 170                                 mrSource.getText(),
 171                                 nIndex,
 172                                 nLength,
 173                                 aNewDXArray,
 174                                 mrSource.getFontAttribute(),
 175                                 mrSource.getLocale(),
 176                                 mrSource.getFontColor()));
 177                     }
 178                 }
 179             }
 180         }
 181
 182         bool TextBreakupHelper::allowChange(sal_uInt32 /*nCount*/, basegfx::B2DHomMatrix& /*rNewTransform*/, sal_uInt32 /*nIndex*/, sal_uInt32 /*nLength*/)
 183         {
 184             return true;
 185         }
 186
 187         void TextBreakupHelper::breakup(BreakupUnit aBreakupUnit)
 188         {
 189             if(mrSource.getTextLength())
 190             {
 191                 Primitive2DContainer aTempResult;
 192                 static css::uno::Reference< css::i18n::XBreakIterator > xBreakIterator;
 193
 194                 if(!xBreakIterator.is())
 195                 {
 196                     css::uno::Reference< css::uno::XComponentContext > xContext( ::comphelper::getProcessComponentContext() );
 197                     xBreakIterator = css::i18n::BreakIterator::create(xContext);
 198                 }
 199
 200                 const OUString& rTxt = mrSource.getText();
 201                 const sal_Int32 nTextLength(mrSource.getTextLength());
 202                 const css::lang::Locale& rLocale = mrSource.getLocale();
 203                 const sal_Int32 nTextPosition(mrSource.getTextPosition());
 204                 sal_Int32 nCurrent(nTextPosition);
 205
 206                 switch(aBreakupUnit)
 207                 {
 208                     case BreakupUnit::Character:
 209                     {
 210                         sal_Int32 nDone;
 211                         sal_Int32 nNextCellBreak(xBreakIterator->nextCharacters(rTxt, nTextPosition, rLocale, css::i18n::CharacterIteratorMode::SKIPCELL, 0, nDone));
 212                         sal_Int32 a(nTextPosition);
 213
 214                         for(; a < nTextPosition + nTextLength; a++)
 215                         {
 216                             if(a == nNextCellBreak)
 217                             {
 218                                 breakupPortion(aTempResult, nCurrent, a - nCurrent, false);
 219                                 nCurrent = a;
 220                                 nNextCellBreak = xBreakIterator->nextCharacters(rTxt, a, rLocale, css::i18n::CharacterIteratorMode::SKIPCELL, 1, nDone);
 221                             }
 222                         }
 223
 224                         breakupPortion(aTempResult, nCurrent, a - nCurrent, false);
 225                         break;
 226                     }
 227                     case BreakupUnit::Word:
 228                     {
 229                         css::i18n::Boundary nNextWordBoundary(xBreakIterator->getWordBoundary(rTxt, nTextPosition, rLocale, css::i18n::WordType::ANY_WORD, true));
 230                         sal_Int32 a(nTextPosition);
 231
 232                         for(; a < nTextPosition + nTextLength; a++)
 233                         {
 234                             if(a == nNextWordBoundary.endPos)
 235                             {
 236                                 if(a > nCurrent)
 237                                 {
 238                                     breakupPortion(aTempResult, nCurrent, a - nCurrent, true);
 239                                 }
 240
 241                                 nCurrent = a;
 242
 243                                 // skip spaces (maybe enhanced with a bool later if needed)
 244                                 {
 245                                     const sal_Int32 nEndOfSpaces(xBreakIterator->endOfCharBlock(rTxt, a, rLocale, css::i18n::CharType::SPACE_SEPARATOR));
 246
 247                                     if(nEndOfSpaces > a)
 248                                     {
 249                                         nCurrent = nEndOfSpaces;
 250                                     }
 251                                 }
 252
 253                                 nNextWordBoundary = xBreakIterator->getWordBoundary(rTxt, a + 1, rLocale, css::i18n::WordType::ANY_WORD, true);
 254                             }
 255                         }
 256
 257                         if(a > nCurrent)
 258                         {
 259                             breakupPortion(aTempResult, nCurrent, a - nCurrent, true);
 260                         }
 261                         break;
 262                     }
 263                 }
 264
 265                 mxResult = aTempResult;
 266             }
 267         }
 268
 269         const Primitive2DContainer& TextBreakupHelper::getResult(BreakupUnit aBreakupUnit) const
 270         {
 271             if(mxResult.empty())
 272             {
 273                 const_cast< TextBreakupHelper* >(this)->breakup(aBreakupUnit);
 274             }
 275
 276             return mxResult;
 277         }
 278
 279     } // end of namespace primitive2d
 280 } // end of namespace drawinglayer
 281
 282 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */