KPIMTextedit Library
textutils.cpp
00001 /* 00002 This file is part of KDE. 00003 00004 Copyright (c) 2009 Thomas McGuire <mcguire@kde.org> 00005 Copyright (c) 2010 Stephen Kelly <steveire@gmail.com> 00006 00007 This library is free software; you can redistribute it and/or modify it 00008 under the terms of the GNU Library General Public License as published by 00009 the Free Software Foundation; either version 2 of the License, or (at your 00010 option) any later version. 00011 00012 This library is distributed in the hope that it will be useful, but WITHOUT 00013 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00014 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public 00015 License for more details. 00016 00017 You should have received a copy of the GNU Library General Public License 00018 along with this library; see the file COPYING.LIB. If not, write to the 00019 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 00020 02110-1301, USA. 00021 */ 00022 00023 #include "textutils.h" 00024 00025 #include <QtGui/QTextBlock> 00026 #include <QtGui/QTextCharFormat> 00027 #include <QtGui/QTextDocument> 00028 #include <KDE/KDebug> 00029 00030 using namespace KPIMTextEdit; 00031 00032 static bool isCharFormatFormatted( const QTextCharFormat &format, const QFont &defaultFont, 00033 const QTextCharFormat &defaultBlockFormat ) 00034 { 00035 if ( !format.anchorHref().isEmpty() || 00036 format.font() != defaultFont || 00037 format.isAnchor() || 00038 format.verticalAlignment() != defaultBlockFormat.verticalAlignment() || 00039 format.layoutDirection() != defaultBlockFormat.layoutDirection() || 00040 format.underlineStyle() != defaultBlockFormat.underlineStyle() || 00041 format.foreground().color() != defaultBlockFormat.foreground().color() || 00042 format.background().color() != defaultBlockFormat.background().color() ) 00043 return true; 00044 00045 return false; 00046 } 00047 00048 static bool isBlockFormatFormatted( const QTextBlockFormat &format, 00049 const QTextBlockFormat &defaultFormat ) 00050 { 00051 if ( format.alignment() != defaultFormat.alignment() || 00052 format.layoutDirection() != defaultFormat.layoutDirection() || 00053 format.indent() != defaultFormat.indent() || 00054 format.textIndent() != defaultFormat.textIndent() ) 00055 return true; 00056 00057 return false; 00058 } 00059 00061 static bool isSpecial( const QTextFormat &charFormat ) 00062 { 00063 return charFormat.isFrameFormat() || charFormat.isImageFormat() || 00064 charFormat.isListFormat() || charFormat.isTableFormat(); 00065 } 00066 00067 bool TextUtils::containsFormatting( const QTextDocument *document ) 00068 { 00069 if ( !document ) 00070 return false; 00071 00072 QTextDocument defaultTextDocument; 00073 const QTextCharFormat defaultCharFormat = defaultTextDocument.begin().charFormat(); 00074 const QTextBlockFormat defaultBlockFormat = defaultTextDocument.begin().blockFormat(); 00075 const QFont defaultFont = defaultTextDocument.defaultFont(); 00076 00077 QTextBlock block = document->firstBlock(); 00078 while ( block.isValid() ) { 00079 00080 if ( isBlockFormatFormatted( block.blockFormat(), defaultBlockFormat ) ) { 00081 return true; 00082 } 00083 00084 if ( isSpecial( block.charFormat() ) || isSpecial( block.blockFormat() ) || 00085 block.textList() ) { 00086 return true; 00087 } 00088 00089 QTextBlock::iterator it = block.begin(); 00090 while ( !it.atEnd() ) { 00091 const QTextFragment fragment = it.fragment(); 00092 const QTextCharFormat charFormat = fragment.charFormat(); 00093 if ( isSpecial( charFormat ) ) { 00094 return true; 00095 } 00096 if ( isCharFormatFormatted( fragment.charFormat(), defaultFont, defaultCharFormat ) ) { 00097 return true; 00098 } 00099 00100 it++; 00101 } 00102 00103 block = block.next(); 00104 } 00105 00106 if ( document->toHtml().contains( QLatin1String( "<hr />" ) ) ) 00107 return true; 00108 00109 return false; 00110 } 00111 00112 QString TextUtils::flowText( QString &wrappedText, const QString& indent, int maxLength ) 00113 { 00114 if ( wrappedText.isEmpty() ) { 00115 return indent + QLatin1String( "\n" ); 00116 } 00117 00118 if ( maxLength < indent.length() ) 00119 maxLength = indent.length() + 1; 00120 00121 maxLength -= indent.length(); // take into account indent 00122 QString result; 00123 while ( !wrappedText.isEmpty() ) 00124 { 00125 // first check for the next newline. if it's before maxLength, break there, and continue 00126 int newLine = wrappedText.indexOf( QLatin1Char( '\n' ) ); 00127 if( newLine > 0 && newLine < maxLength ) { 00128 result += indent + wrappedText.left( newLine + 1 ); 00129 wrappedText = wrappedText.mid( newLine + 1 ); 00130 continue; 00131 } 00132 // Find the next point in the wrappedText where we have to do a line break. Start searching 00133 // at maxLength position and then walk backwards looking for a space 00134 int breakPosition; 00135 if ( wrappedText.length() > maxLength ) 00136 { 00137 breakPosition = maxLength; 00138 while( ( breakPosition >= 0 ) && ( wrappedText[breakPosition] != QLatin1Char( ' ' ) ) ) 00139 breakPosition--; 00140 if ( breakPosition <= 0 ) { 00141 // Couldn't break before maxLength. 00142 breakPosition = maxLength; 00143 } 00144 } 00145 else { 00146 breakPosition = wrappedText.length(); 00147 } 00148 00149 QString line = wrappedText.left( breakPosition ); 00150 if ( breakPosition < wrappedText.length() ) 00151 wrappedText = wrappedText.mid( breakPosition ); 00152 else 00153 wrappedText.clear(); 00154 00155 // Strip leading whitespace of new lines, since that looks strange 00156 if ( !result.isEmpty() && line.startsWith( QLatin1Char( ' ' ) ) ) 00157 line = line.mid( 1 ); 00158 00159 result += indent + line + QLatin1Char( '\n' ); 00160 } 00161 00162 return result; 00163 }