sal/osl/all/filepath.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 <osl/file.h>
  21 #include <rtl/ustring.h>
  22
  23 static sal_uInt32 osl_defCalcTextWidth( rtl_uString *ustrText )
  24 {
  25     return ustrText ? ustrText->length : 0;
  26 }
  27
  28 oslFileError SAL_CALL osl_abbreviateSystemPath( rtl_uString *ustrSystemPath, rtl_uString **pustrCompacted, sal_uInt32 uMaxWidth, oslCalcTextWidthFunc pfnCalcWidth )
  29 {
  30     rtl_uString     *ustrPath = nullptr;
  31     rtl_uString     *ustrFile = nullptr;
  32     sal_uInt32      uPathWidth, uFileWidth;
  33
  34     if ( !pfnCalcWidth )
  35         pfnCalcWidth = osl_defCalcTextWidth;
  36
  37     {
  38         sal_Int32   iLastSlash = rtl_ustr_lastIndexOfChar_WithLength( ustrSystemPath->buffer, ustrSystemPath->length, SAL_PATHDELIMITER );
  39
  40         if ( iLastSlash >= 0 )
  41         {
  42             rtl_uString_newFromStr_WithLength( &ustrPath, ustrSystemPath->buffer, iLastSlash );
  43             rtl_uString_newFromStr_WithLength( &ustrFile, &ustrSystemPath->buffer[iLastSlash], ustrSystemPath->length - iLastSlash );
  44         }
  45         else
  46         {
  47             rtl_uString_new( &ustrPath );
  48             rtl_uString_newFromString( &ustrFile, ustrSystemPath );
  49         }
  50     }
  51
  52     uPathWidth = pfnCalcWidth( ustrPath );
  53     uFileWidth = pfnCalcWidth( ustrFile );
  54
  55     /* First abbreviate the directory component of the path */
  56
  57     while ( uPathWidth + uFileWidth > uMaxWidth )
  58     {
  59         if ( ustrPath->length > 3 )
  60         {
  61             ustrPath->length--;
  62             ustrPath->buffer[ustrPath->length-3] = '.';
  63             ustrPath->buffer[ustrPath->length-2] = '.';
  64             ustrPath->buffer[ustrPath->length-1] = '.';
  65             ustrPath->buffer[ustrPath->length] = 0;
  66
  67             uPathWidth = pfnCalcWidth( ustrPath );
  68         }
  69         else
  70             break;
  71     }
  72
  73     /* Now abbreviate file component */
  74
  75     while ( uPathWidth + uFileWidth > uMaxWidth )
  76     {
  77         if ( ustrFile->length > 4 )
  78         {
  79             ustrFile->length--;
  80             ustrFile->buffer[ustrFile->length-3] = '.';
  81             ustrFile->buffer[ustrFile->length-2] = '.';
  82             ustrFile->buffer[ustrFile->length-1] = '.';
  83             ustrFile->buffer[ustrFile->length] = 0;
  84
  85             uFileWidth = pfnCalcWidth( ustrFile );
  86         }
  87         else
  88             break;
  89     }
  90
  91     rtl_uString_newConcat( pustrCompacted, ustrPath, ustrFile );
  92
  93     /* Event now if path was compacted to ".../..." it can be to large */
  94
  95     uPathWidth += uFileWidth;
  96
  97     while ( uPathWidth > uMaxWidth )
  98     {
  99         (*pustrCompacted)->length--;
 100         (*pustrCompacted)->buffer[(*pustrCompacted)->length] = 0;
 101         uPathWidth = pfnCalcWidth( *pustrCompacted );
 102     }
 103
 104     if ( ustrPath )
 105         rtl_uString_release( ustrPath );
 106
 107     if ( ustrFile )
 108         rtl_uString_release( ustrFile );
 109
 110     return osl_File_E_None;
 111 }
 112
 113 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */