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