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      1 /*
      2  * Copyright (C) 2009 Apple Inc.  All rights reserved.
      3  * Copyright (C) 2009 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "platform/clipboard/ClipboardUtilities.h"
     29 
     30 #include "wtf/text/StringBuilder.h"
     31 #include "wtf/text/WTFString.h"
     32 
     33 #include <shlwapi.h>
     34 
     35 namespace WebCore {
     36 
     37 // FAT32 and NTFS both limit filenames to a maximum of 255 characters.
     38 static const unsigned maxFilenameLength = 255;
     39 
     40 // Returns true if the specified character is not valid in a file name. This
     41 // is intended for use with removeCharacters.
     42 static bool isInvalidFileCharacter(UChar c)
     43 {
     44     return !(PathGetCharType(c) & (GCT_LFNCHAR | GCT_SHORTCHAR));
     45 }
     46 
     47 void replaceNewlinesWithWindowsStyleNewlines(String& str)
     48 {
     49     DEFINE_STATIC_LOCAL(String, windowsNewline, ("\r\n"));
     50     StringBuilder result;
     51     for (unsigned index = 0; index < str.length(); ++index) {
     52         if (str[index] != '\n' || (index > 0 && str[index - 1] == '\r'))
     53             result.append(str[index]);
     54         else
     55             result.append(windowsNewline);
     56     }
     57     str = result.toString();
     58 }
     59 
     60 void validateFilename(String& name, String& extension)
     61 {
     62     // Remove any invalid file system characters.
     63     name = name.removeCharacters(&isInvalidFileCharacter);
     64     extension = extension.removeCharacters(&isInvalidFileCharacter);
     65 
     66     if (extension.length() >= maxFilenameLength)
     67         extension = String();
     68 
     69     // Truncate overly-long filenames, reserving one character for a dot.
     70     name.truncate(maxFilenameLength - extension.length() - 1);
     71 }
     72 
     73 } // namespace WebCore
     74