1 /* 2 * Copyright (C) 2009, 2010 Nicolas Bonnefon and other contributors 3 * 4 * This file is part of glogg. 5 * 6 * glogg is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 3 of the License, or 9 * (at your option) any later version. 10 * 11 * glogg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with glogg. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef ABSTRACTLOGDATA_H 21 #define ABSTRACTLOGDATA_H 22 23 #include <QObject> 24 #include <QString> 25 #include <QStringList> 26 27 #include "utils.h" 28 29 // Base class representing a set of data. 30 // It can be either a full set or a filtered set. 31 class AbstractLogData : public QObject { 32 Q_OBJECT 33 34 public: 35 AbstractLogData(); 36 // Permit each child to have its destructor ~AbstractLogData()37 virtual ~AbstractLogData() {}; 38 39 // Returns the line passed as a QString 40 QString getLineString( qint64 line ) const; 41 // Returns the line passed as a QString, with tabs expanded 42 QString getExpandedLineString( qint64 line ) const; 43 // Returns a set of lines as a QStringList 44 QStringList getLines( qint64 first_line, int number ) const; 45 // Returns a set of lines with tabs expanded 46 QStringList getExpandedLines( qint64 first_line, int number ) const; 47 // Returns the total number of lines 48 qint64 getNbLine() const; 49 // Returns the visible length of the longest line 50 // Tabs are expanded 51 int getMaxLength() const; 52 // Returns the visible length of the passed line 53 // Tabs are expanded 54 int getLineLength( qint64 line ) const; 55 56 // Set the view to use the passed encoding for display 57 void setDisplayEncoding( Encoding encoding ); 58 59 // Length of a tab stop 60 static const int tabStop = 8; 61 62 protected: 63 // Internal function called to get a given line 64 virtual QString doGetLineString( qint64 line ) const = 0; 65 // Internal function called to get a given line 66 virtual QString doGetExpandedLineString( qint64 line ) const = 0; 67 // Internal function called to get a set of lines 68 virtual QStringList doGetLines( qint64 first_line, int number ) const = 0; 69 // Internal function called to get a set of expanded lines 70 virtual QStringList doGetExpandedLines( qint64 first_line, int number ) const = 0; 71 // Internal function called to get the number of lines 72 virtual qint64 doGetNbLine() const = 0; 73 // Internal function called to get the maximum length 74 virtual int doGetMaxLength() const = 0; 75 // Internal function called to get the line length 76 virtual int doGetLineLength( qint64 line ) const = 0; 77 // Internal function called to set the encoding 78 virtual void doSetDisplayEncoding( Encoding encoding ) = 0; 79 // Internal function called to set the newline offsets 80 virtual void doSetMultibyteEncodingOffsets( int before_cr, int after_cr ) = 0; 81 untabify(const QString & line)82 static inline QString untabify( const QString& line ) { 83 QString untabified_line; 84 int total_spaces = 0; 85 86 for ( int j = 0; j < line.length(); j++ ) { 87 if ( line[j] == '\t' ) { 88 int spaces = tabStop - ( ( j + total_spaces ) % tabStop ); 89 // LOG(logDEBUG4) << "Replacing tab at char " << j << " (" << spaces << " spaces)"; 90 QString blanks( spaces, QChar(' ') ); 91 untabified_line.append( blanks ); 92 total_spaces += spaces - 1; 93 } 94 else if ( line[j] == '\0' ) { 95 untabified_line.append( QChar(' ') ); 96 } 97 else { 98 untabified_line.append( line[j] ); 99 } 100 } 101 102 return untabified_line; 103 } 104 untabify(const char * line)105 static inline QString untabify( const char* line ) { 106 QString untabified_line; 107 int total_spaces = 0; 108 109 for ( const char* i = line; *i != '\0'; i++ ) { 110 if ( *i == '\t' ) { 111 int spaces = tabStop - ( ( (i - line) + total_spaces ) % tabStop ); 112 // LOG(logDEBUG4) << "Replacing tab at char " << j << " (" << spaces << " spaces)"; 113 QString blanks( spaces, QChar(' ') ); 114 untabified_line.append( blanks ); 115 total_spaces += spaces - 1; 116 } 117 else if ( *i == '\0' ) { 118 untabified_line.append( QChar(' ') ); 119 } 120 else { 121 untabified_line.append( *i ); 122 } 123 } 124 125 return untabified_line; 126 } 127 }; 128 129 #endif 130