sw/source/core/text/frminf.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.
   4  *
   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 <sal/config.h>
  21
  22 #include <frminf.hxx>
  23 #include "itrtxt.hxx"
  24
  25 TextFrameIndex SwTextMargin::GetTextStart() const
  26 {
  27     const OUString &rText = GetInfo().GetText();
  28     const TextFrameIndex nEnd = m_nStart + m_pCurr->GetLen();
  29
  30     for (TextFrameIndex i = m_nStart; i < nEnd; ++i)
  31     {
  32         const sal_Unicode aChar = rText[sal_Int32(i)];
  33         if( CH_TAB != aChar && ' ' != aChar )
  34             return i;
  35     }
  36     return nEnd;
  37 }
  38
  39 TextFrameIndex SwTextMargin::GetTextEnd() const
  40 {
  41     const OUString &rText = GetInfo().GetText();
  42     const TextFrameIndex nEnd = m_nStart + m_pCurr->GetLen();
  43     for (TextFrameIndex i = nEnd - TextFrameIndex(1); i >= m_nStart; --i)
  44     {
  45         const sal_Unicode aChar = rText[sal_Int32(i)];
  46         if( CH_TAB != aChar && CH_BREAK != aChar && ' ' != aChar )
  47             return i + TextFrameIndex(1);
  48     }
  49     return m_nStart;
  50 }
  51
  52 // Does the paragraph fit into one line?
  53 bool SwTextFrameInfo::IsOneLine() const
  54 {
  55     const SwLineLayout *pLay = m_pFrame->GetPara();
  56     if( !pLay )
  57         return false;
  58
  59     // For follows false of course
  60     if( m_pFrame->GetFollow() )
  61         return false;
  62
  63     pLay = pLay->GetNext();
  64     while( pLay )
  65     {
  66         if( pLay->GetLen() )
  67             return false;
  68         pLay = pLay->GetNext();
  69     }
  70     return true;
  71 }
  72
  73 // Is the line filled for X percent?
  74 bool SwTextFrameInfo::IsFilled( const sal_uInt8 nPercent ) const
  75 {
  76     const SwLineLayout *pLay = m_pFrame->GetPara();
  77     if( !pLay )
  78         return false;
  79
  80     tools::Long nWidth = m_pFrame->getFramePrintArea().Width();
  81     nWidth *= nPercent;
  82     nWidth /= 100;
  83     return nWidth <= pLay->Width();
  84 }
  85
  86 // Where does the text start (without whitespace)? (document global)
  87 SwTwips SwTextFrameInfo::GetLineStart( const SwTextCursor &rLine )
  88 {
  89     const TextFrameIndex nTextStart = rLine.GetTextStart();
  90     if( rLine.GetStart() == nTextStart )
  91         return rLine.GetLineStart();
  92
  93     SwRect aRect;
  94     const_cast<SwTextCursor&>(rLine).GetCharRect( &aRect, nTextStart );
  95     return aRect.Left();
  96 }
  97
  98 // Where does the text start (without whitespace)? (relative in the Frame)
  99 SwTwips SwTextFrameInfo::GetLineStart() const
 100 {
 101     SwTextSizeInfo aInf( const_cast<SwTextFrame*>(m_pFrame) );
 102     SwTextCursor aLine( const_cast<SwTextFrame*>(m_pFrame), &aInf );
 103     return GetLineStart( aLine ) - m_pFrame->getFrameArea().Left() - m_pFrame->getFramePrintArea().Left();
 104 }
 105
 106 // Calculates the character's position and returns the middle position
 107 SwTwips SwTextFrameInfo::GetCharPos(TextFrameIndex const nChar, bool bCenter) const
 108 {
 109     SwRectFnSet aRectFnSet(m_pFrame);
 110     SwFrameSwapper aSwapper( m_pFrame, true );
 111
 112     SwTextSizeInfo aInf( const_cast<SwTextFrame*>(m_pFrame) );
 113     SwTextCursor aLine( const_cast<SwTextFrame*>(m_pFrame), &aInf );
 114
 115     SwTwips nStt, nNext;
 116     SwRect aRect;
 117     aLine.GetCharRect( &aRect, nChar );
 118     if ( aRectFnSet.IsVert() )
 119         m_pFrame->SwitchHorizontalToVertical( aRect );
 120
 121     nStt = aRectFnSet.GetLeft(aRect);
 122
 123     if( !bCenter )
 124         return nStt - aRectFnSet.GetLeft(m_pFrame->getFrameArea());
 125
 126     aLine.GetCharRect( &aRect, nChar + TextFrameIndex(1) );
 127     if ( aRectFnSet.IsVert() )
 128         m_pFrame->SwitchHorizontalToVertical( aRect );
 129
 130     nNext = aRectFnSet.GetLeft(aRect);
 131
 132     return (( nNext + nStt ) / 2 ) - aRectFnSet.GetLeft(m_pFrame->getFrameArea());
 133 }
 134
 135 static void
 136 AddRange(std::vector<std::pair<TextFrameIndex, TextFrameIndex>> & rRanges,
 137             TextFrameIndex const nPos, TextFrameIndex const nLen)
 138 {
 139     assert(rRanges.empty() || rRanges.back().second <= nPos);
 140     if( nLen )
 141     {
 142         if (!rRanges.empty() && nPos == rRanges.back().second)
 143         {
 144             rRanges.back().second += nLen;
 145         }
 146         else
 147         {
 148             rRanges.emplace_back(nPos, nPos + nLen);
 149         }
 150     }
 151 }
 152
 153 // Accumulates the whitespace at line start and end in the vector
 154 void SwTextFrameInfo::GetSpaces(
 155     std::vector<std::pair<TextFrameIndex, TextFrameIndex>> & rRanges,
 156     bool const bWithLineBreak) const
 157 {
 158     SwTextSizeInfo aInf( const_cast<SwTextFrame*>(m_pFrame) );
 159     SwTextMargin aLine( const_cast<SwTextFrame*>(m_pFrame), &aInf );
 160     bool bFirstLine = true;
 161     do {
 162
 163         if( aLine.GetCurr()->GetLen() )
 164         {
 165             TextFrameIndex nPos = aLine.GetTextStart();
 166             // Do NOT include the blanks/tabs from the first line
 167             // in the selection
 168             if( !bFirstLine && nPos > aLine.GetStart() )
 169                 AddRange( rRanges, aLine.GetStart(), nPos - aLine.GetStart() );
 170
 171             // Do NOT include the blanks/tabs from the last line
 172             // in the selection
 173             if( aLine.GetNext() )
 174             {
 175                 TextFrameIndex const nEndPos{aLine.GetTextEnd()};
 176
 177                 // if only whitespace in line, nEndPos < nPos !
 178                 if (nPos < nEndPos && nEndPos < aLine.GetEnd())
 179                 {
 180                     TextFrameIndex const nOff( !bWithLineBreak && CH_BREAK ==
 181                         aLine.GetInfo().GetChar(aLine.GetEnd() - TextFrameIndex(1))
 182                                 ? 1 : 0 );
 183                     AddRange(rRanges, nEndPos, aLine.GetEnd() - nEndPos - nOff);
 184                 }
 185             }
 186         }
 187         bFirstLine = false;
 188     }
 189     while( aLine.Next() );
 190 }
 191
 192 // Is there a bullet/symbol etc. at the text position?
 193 // Fonts: CharSet, SYMBOL and DONTKNOW
 194 bool SwTextFrameInfo::IsBullet(TextFrameIndex const nTextStart) const
 195 {
 196     SwTextSizeInfo aInf( const_cast<SwTextFrame*>(m_pFrame) );
 197     SwTextMargin aLine( const_cast<SwTextFrame*>(m_pFrame), &aInf );
 198     aInf.SetIdx( nTextStart );
 199     return aLine.IsSymbol( nTextStart );
 200 }
 201
 202 // Get first line indent
 203 // The precondition for a positive or negative first line indent:
 204 // All lines (except for the first one) have the same left margin.
 205 // We do not want to be so picky and work with a tolerance of TOLERANCE twips.
 206 SwTwips SwTextFrameInfo::GetFirstIndent() const
 207 {
 208     SwTextSizeInfo aInf( const_cast<SwTextFrame*>(m_pFrame) );
 209     SwTextCursor aLine( const_cast<SwTextFrame*>(m_pFrame), &aInf );
 210     const SwTwips nFirst = GetLineStart( aLine );
 211     const SwTwips TOLERANCE = 20;
 212
 213     if( !aLine.Next() )
 214         return 0;
 215
 216     SwTwips nLeft = GetLineStart( aLine );
 217     while( aLine.Next() )
 218     {
 219         if( aLine.GetCurr()->GetLen() )
 220         {
 221             const SwTwips nCurrLeft = GetLineStart( aLine );
 222             if( nLeft + TOLERANCE < nCurrLeft ||
 223                 nLeft - TOLERANCE > nCurrLeft )
 224                 return 0;
 225         }
 226     }
 227
 228     // At first we only return +1, -1 and 0
 229     if( nLeft == nFirst )
 230         return 0;
 231
 232     if( nLeft > nFirst )
 233         return -1;
 234
 235     return 1;
 236 }
 237
 238 sal_Int32 SwTextFrameInfo::GetBigIndent(TextFrameIndex& rFndPos,
 239                                     const SwTextFrame *pNextFrame ) const
 240 {
 241     SwTextSizeInfo aInf( const_cast<SwTextFrame*>(m_pFrame) );
 242     SwTextCursor aLine( const_cast<SwTextFrame*>(m_pFrame), &aInf );
 243     SwTwips nNextIndent = 0;
 244
 245     if( pNextFrame )
 246     {
 247         // I'm a single line
 248         SwTextSizeInfo aNxtInf( const_cast<SwTextFrame*>(pNextFrame) );
 249         SwTextCursor aNxtLine( const_cast<SwTextFrame*>(pNextFrame), &aNxtInf );
 250         nNextIndent = GetLineStart( aNxtLine );
 251     }
 252     else
 253     {
 254         // I'm multi-line
 255         if( aLine.Next() )
 256         {
 257             nNextIndent = GetLineStart( aLine );
 258             aLine.Prev();
 259         }
 260     }
 261
 262     if( nNextIndent <= GetLineStart( aLine ) )
 263         return 0;
 264
 265     const Point aPoint( nNextIndent, aLine.Y() );
 266     rFndPos = aLine.GetModelPositionForViewPoint( nullptr, aPoint, false );
 267     if (TextFrameIndex(1) >= rFndPos)
 268         return 0;
 269
 270     // Is on front of a non-space
 271     const OUString& rText = aInf.GetText();
 272     sal_Unicode aChar = rText[sal_Int32(rFndPos)];
 273     if( CH_TAB == aChar || CH_BREAK == aChar || ' ' == aChar ||
 274         (( CH_TXTATR_BREAKWORD == aChar || CH_TXTATR_INWORD == aChar ) &&
 275             aInf.HasHint( rFndPos ) ) )
 276         return 0;
 277
 278     // and after a space
 279     aChar = rText[sal_Int32(rFndPos) - 1];
 280     if( CH_TAB != aChar && CH_BREAK != aChar &&
 281         ( ( CH_TXTATR_BREAKWORD != aChar && CH_TXTATR_INWORD != aChar ) ||
 282             !aInf.HasHint(rFndPos - TextFrameIndex(1))) &&
 283         // More than two Blanks!
 284         (' ' != aChar || ' ' != rText[sal_Int32(rFndPos) - 2]))
 285         return 0;
 286
 287     SwRect aRect;
 288     aLine.GetCharRect( &aRect, rFndPos );
 289     return static_cast<sal_Int32>(aRect.Left() - m_pFrame->getFrameArea().Left() - m_pFrame->getFramePrintArea().Left());
 290 }
 291
 292 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */