text: /*
    ==============================================================================
  
     This file is part of the JUCE library.
     Copyright (c) 2017 - ROLI Ltd.
  
     JUCE is an open source library subject to commercial or open-source
     licensing.
  
     The code included in this file is provided under the terms of the ISC license
     http://www.isc.org/downloads/software-support-policy/isc-license. Permission
     To use, copy, modify, and/or distribute this software for any purpose with or
     without fee is hereby granted provided that the above copyright notice and
     this permission notice appear in all copies.
  
     JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
     EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
     DISCLAIMED.
  
    ==============================================================================
  */
  
  namespace juce
  {
  
  //==============================================================================
  /**
      Searches through the files in a directory, returning each file that is found.
  
      A DirectoryIterator will search through a directory and its subdirectories using
      a wildcard filepattern match.
  
      If you may be scanning a large number of files, it's usually smarter to use this
      class than File::findChildFiles() because it allows you to stop at any time, rather
      than having to wait for the entire scan to finish before getting the results.
  
      Please note that the order in which files are returned is completely undefined!
      They'll arrive in whatever order the underlying OS calls provide them, which will
      depend on the filesystem and other factors. If you need a sorted list, you'll need
      to manually sort them using your preferred comparator after collecting the list.
  
      It also provides an estimate of its progress, using a (highly inaccurate!) algorithm.
  */
  class JUCE_API  DirectoryIterator  final
  {
  public:
      //==============================================================================
      /** Creates a DirectoryIterator for a given directory.
  
          After creating one of these, call its next() method to get the
          first file - e.g. @code
  
          DirectoryIterator iter (File ("/animals/mooses"), true, "*.moose");
  
          while (iter.next())
          {
              File theFileItFound (iter.getFile());
  
              ... etc
          }
          @endcode
  
          @param directory    the directory to search in
          @param isRecursive  whether all the subdirectories should also be searched
          @param wildCard     the file pattern to match. This may contain multiple patterns
                              separated by a semi-colon or comma, e.g. "*.jpg;*.png"
          @param whatToLookFor    a value from the File::TypesOfFileToFind enum, specifying
                                  whether to look for files, directories, or both.
      */
      DirectoryIterator (const File& directory,
                         bool isRecursive,
                         const String& wildCard = "*",
                         int whatToLookFor = File::findFiles);
  
      /** Destructor. */
      ~DirectoryIterator();
  
      /** Moves the iterator along to the next file.
  
          @returns    true if a file was found (you can then use getFile() to see what it was) - or
                      false if there are no more matching files.
      */
      bool next();
  
      /** Moves the iterator along to the next file, and returns various properties of that file.
  
          If you need to find out details about the file, it's more efficient to call this method than
          to call the normal next() method and then find out the details afterwards.
  
          All the parameters are optional, so pass null pointers for any items that you're not
          interested in.
  
          @returns    true if a file was found (you can then use getFile() to see what it was) - or
                      false if there are no more matching files. If it returns false, then none of the
                      parameters will be filled-in.
      */
      bool next (bool* isDirectory,
                 bool* isHidden,
                 int64* fileSize,
                 Time* modTime,
                 Time* creationTime,
                 bool* isReadOnly);
  
      /** Returns the file that the iterator is currently pointing at.
  
          The result of this call is only valid after a call to next() has returned true.
      */
      const File& getFile() const;
  
      /** Returns a guess of how far through the search the iterator has got.
  
          @returns    a value 0.0 to 1.0 to show the progress, although this won't be
                      very accurate.
      */
      float getEstimatedProgress() const;
  
  private:
      //==============================================================================
      class NativeIterator
      {
      public:
          NativeIterator (const File& directory, const String& wildCard);
          ~NativeIterator();
  
          bool next (String& filenameFound,
                     bool* isDirectory, bool* isHidden, int64* fileSize,
                     Time* modTime, Time* creationTime, bool* isReadOnly);
  
          class Pimpl;
  
      private:
          friend class DirectoryIterator;
          friend struct ContainerDeletePolicy<Pimpl>;
          ScopedPointer<Pimpl> pimpl;
  
          JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (NativeIterator)
      };
  
      friend struct ContainerDeletePolicy<NativeIterator::Pimpl>;
      StringArray wildCards;
      NativeIterator fileFinder;
      String wildCard, path;
      int index;
      mutable int totalNumFiles;
      const int whatToLookFor;
      const bool isRecursive;
      bool hasBeenAdvanced;
      ScopedPointer<DirectoryIterator> subIterator;
      File currentFile;
  
      static StringArray parseWildcards (const String& pattern);
      static bool fileMatches (const StringArray& wildCards, const String& filename);
  
      JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (DirectoryIterator)
  };
  
  } // namespace juce
  