sal/osl/all/filepath.c

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  28
  29 #include <osl/file.h>
  30 #include <rtl/ustring.h>
  31
  32 static sal_uInt32 SAL_CALL osl_defCalcTextWidth( rtl_uString *ustrText )
  33 {
  34     return ustrText ? ustrText->length : 0;
  35 }
  36
  37
  38 oslFileError SAL_CALL osl_abbreviateSystemPath( rtl_uString *ustrSystemPath, rtl_uString **pustrCompacted, sal_uInt32 uMaxWidth, oslCalcTextWidthFunc pfnCalcWidth )
  39 {
  40     oslFileError    error = osl_File_E_None;
  41     rtl_uString     *ustrPath = NULL;
  42     rtl_uString     *ustrFile = NULL;
  43     sal_uInt32      uPathWidth, uFileWidth;
  44
  45     if ( !pfnCalcWidth )
  46         pfnCalcWidth = osl_defCalcTextWidth;
  47
  48     {
  49         sal_Int32   iLastSlash = rtl_ustr_lastIndexOfChar_WithLength( ustrSystemPath->buffer, ustrSystemPath->length, SAL_PATHDELIMITER );
  50
  51         if ( iLastSlash >= 0 )
  52         {
  53             rtl_uString_newFromStr_WithLength( &ustrPath, ustrSystemPath->buffer, iLastSlash );
  54             rtl_uString_newFromStr_WithLength( &ustrFile, &ustrSystemPath->buffer[iLastSlash], ustrSystemPath->length - iLastSlash );
  55         }
  56         else
  57         {
  58             rtl_uString_new( &ustrPath );
  59             rtl_uString_newFromString( &ustrFile, ustrSystemPath );
  60         }
  61     }
  62
  63     uPathWidth = pfnCalcWidth( ustrPath );
  64     uFileWidth = pfnCalcWidth( ustrFile );
  65
  66     /* First abbreviate the directory component of the path */
  67
  68     while ( uPathWidth + uFileWidth > uMaxWidth )
  69     {
  70         if ( ustrPath->length > 3 )
  71         {
  72             ustrPath->length--;
  73             ustrPath->buffer[ustrPath->length-3] = '.';
  74             ustrPath->buffer[ustrPath->length-2] = '.';
  75             ustrPath->buffer[ustrPath->length-1] = '.';
  76             ustrPath->buffer[ustrPath->length] = 0;
  77
  78             uPathWidth = pfnCalcWidth( ustrPath );
  79         }
  80         else
  81             break;
  82     }
  83
  84     /* Now abbreviate file component */
  85
  86     while ( uPathWidth + uFileWidth > uMaxWidth )
  87     {
  88         if ( ustrFile->length > 4 )
  89         {
  90             ustrFile->length--;
  91             ustrFile->buffer[ustrFile->length-3] = '.';
  92             ustrFile->buffer[ustrFile->length-2] = '.';
  93             ustrFile->buffer[ustrFile->length-1] = '.';
  94             ustrFile->buffer[ustrFile->length] = 0;
  95
  96             uFileWidth = pfnCalcWidth( ustrFile );
  97         }
  98         else
  99             break;
 100     }
 101
 102     rtl_uString_newConcat( pustrCompacted, ustrPath, ustrFile );
 103
 104     /* Event now if path was compacted to ".../..." it can be to large */
 105
 106     uPathWidth += uFileWidth;
 107
 108     while ( uPathWidth > uMaxWidth )
 109     {
 110         (*pustrCompacted)->length--;
 111         (*pustrCompacted)->buffer[(*pustrCompacted)->length] = 0;
 112         uPathWidth = pfnCalcWidth( *pustrCompacted );
 113     }
 114
 115     if ( ustrPath )
 116         rtl_uString_release( ustrPath );
 117
 118     if ( ustrFile )
 119         rtl_uString_release( ustrFile );
 120
 121     return error;
 122 }
 123
 124
 125 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */