src/common/textfile.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/textfile.cpp
   3 // Purpose:     implementation of wxTextFile class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     03.04.98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // headers
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "textfile.h"
  18 #endif
  19
  20 #include  "wx/wxprec.h"
  21
  22 #ifdef    __BORLANDC__
  23     #pragma hdrstop
  24 #endif  //__BORLANDC__
  25
  26 #if !wxUSE_FILE || !wxUSE_TEXTBUFFER
  27     #undef wxUSE_TEXTFILE
  28     #define wxUSE_TEXTFILE 0
  29 #endif // wxUSE_FILE
  30
  31 #if wxUSE_TEXTFILE
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/string.h"
  35     #include "wx/intl.h"
  36     #include "wx/file.h"
  37     #include "wx/log.h"
  38 #endif
  39
  40 #include "wx/textfile.h"
  41 #include "wx/filename.h"
  42
  43 // ============================================================================
  44 // wxTextFile class implementation
  45 // ============================================================================
  46
  47 wxTextFile::wxTextFile(const wxString& strFileName)
  48           : wxTextBuffer(strFileName)
  49 {
  50 }
  51
  52
  53 // ----------------------------------------------------------------------------
  54 // file operations
  55 // ----------------------------------------------------------------------------
  56
  57 bool wxTextFile::OnExists() const
  58 {
  59     return wxFile::Exists(m_strBufferName);
  60 }
  61
  62
  63 bool wxTextFile::OnOpen(const wxString &strBufferName, wxTextBufferOpenMode OpenMode)
  64 {
  65     wxFile::OpenMode FileOpenMode;
  66
  67     switch ( OpenMode )
  68     {
  69         default:
  70             wxFAIL_MSG( _T("unknown open mode in wxTextFile::Open") );
  71             // fall through
  72
  73         case ReadAccess :
  74             FileOpenMode = wxFile::read;
  75             break;
  76
  77         case WriteAccess :
  78             FileOpenMode = wxFile::write;
  79             break;
  80     }
  81
  82     return m_file.Open(strBufferName.c_str(), FileOpenMode);
  83 }
  84
  85
  86 bool wxTextFile::OnClose()
  87 {
  88     return m_file.Close();
  89 }
  90
  91
  92 bool wxTextFile::OnRead(wxMBConv& conv)
  93 {
  94   // file should be opened and we must be in it's beginning
  95   wxASSERT( m_file.IsOpened() && m_file.Tell() == 0 );
  96
  97 #if wxUSE_UNICODE
  98   char conv_mbBuf[2];
  99   wchar_t conv_wcBuf[2];
 100   conv_mbBuf[1] = 0;
 101 #else
 102   (void)conv;
 103 #endif
 104
 105   wxString str;
 106   char ch, chLast = '\0';
 107   char buf[1024];
 108   int n, nRead;
 109   do {
 110     nRead = m_file.Read(buf, WXSIZEOF(buf));
 111     if ( nRead == wxInvalidOffset ) {
 112       // read error (error message already given in wxFile::Read)
 113       return FALSE;
 114     }
 115
 116     for ( n = 0; n < nRead; n++ ) {
 117       ch = buf[n];
 118       switch ( ch ) {
 119         case '\n':
 120           // Dos/Unix line termination
 121                 AddLine(str, chLast == '\r' ? wxTextFileType_Dos
 122                                       : wxTextFileType_Unix);
 123           str.Empty();
 124           chLast = '\n';
 125           break;
 126
 127         case '\r':
 128           if ( chLast == '\r' ) {
 129             // Mac empty line
 130                     AddLine(wxEmptyString, wxTextFileType_Mac);
 131           }
 132           else
 133             chLast = '\r';
 134           break;
 135
 136         default:
 137           if ( chLast == '\r' ) {
 138             // Mac line termination
 139                     AddLine(str, wxTextFileType_Mac);
 140             chLast = ch;
 141 #if wxUSE_UNICODE
 142             conv_mbBuf[0] = ch;
 143             if (conv.MB2WC(conv_wcBuf, conv_mbBuf, 2) == (size_t)-1)
 144                 conv_wcBuf[0] = ch;
 145             str = conv_wcBuf[0];
 146 #else
 147             str = ch;
 148 #endif
 149           }
 150           else {
 151             // add to the current line
 152 #if wxUSE_UNICODE
 153             conv_mbBuf[0] = ch;
 154             if (conv.MB2WC(conv_wcBuf, conv_mbBuf, 2) == (size_t)-1)
 155                 conv_wcBuf[0] = ch;
 156             str += conv_wcBuf[0];
 157 #else
 158             str += ch;
 159 #endif
 160           }
 161       }
 162     }
 163   } while ( nRead == WXSIZEOF(buf) );
 164
 165   // anything in the last line?
 166   if ( !str.IsEmpty() ) {
 167         AddLine(str, wxTextFileType_None);  // no line terminator
 168   }
 169
 170   return TRUE;
 171 }
 172
 173
 174 bool wxTextFile::OnWrite(wxTextFileType typeNew, wxMBConv& conv)
 175 {
 176     wxFileName fn = m_strBufferName;
 177     if ( !fn.IsAbsolute() )
 178         fn.Normalize();
 179
 180     wxTempFile fileTmp(fn.GetFullName());
 181
 182     if ( !fileTmp.IsOpened() ) {
 183         wxLogError(_("can't write buffer '%s' to disk."), m_strBufferName.c_str());
 184         return FALSE;
 185     }
 186
 187     size_t nCount = GetLineCount();
 188     for ( size_t n = 0; n < nCount; n++ ) {
 189         fileTmp.Write(GetLine(n) +
 190                       GetEOL(typeNew == wxTextFileType_None ? GetLineType(n)
 191                                                             : typeNew),
 192                       conv);
 193     }
 194
 195     // replace the old file with this one
 196     return fileTmp.Commit();
 197 }
 198
 199 #endif // wxUSE_TEXTFILE
 200