juce_DirectoryIterator.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   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
{
 
#ifndef DOXYGEN
 
//==============================================================================
class JUCE_API  DirectoryIterator  final
{
public:
    //==============================================================================
    [[deprecated ("This class is now deprecated in favour of RangedDirectoryIterator.")]]
    DirectoryIterator (const File& directory,
                       bool recursive,
                       const String& pattern = "*",
                       int type = File::findFiles,
                       File::FollowSymlinks follow = File::FollowSymlinks::yes)
        : DirectoryIterator (directory, recursive, pattern, type, follow, nullptr)
    {
    }

    bool next();

    bool next (bool* isDirectory,
               bool* isHidden,
               int64* fileSize,
               Time* modTime,
               Time* creationTime,
               bool* isReadOnly);

    const File& getFile() const;

    float getEstimatedProgress() const;
 
private:
    using KnownPaths = std::set<File>;
 
    DirectoryIterator (const File& directory,
                       bool recursive,
                       const String& pattern,
                       int type,
                       File::FollowSymlinks follow,
                       KnownPaths* seenPaths)
            : wildCards (parseWildcards (pattern)),
              fileFinder (directory, (recursive || wildCards.size() > 1) ? "*" : pattern),
              wildCard (pattern),
              path (File::addTrailingSeparator (directory.getFullPathName())),
              whatToLookFor (type),
              isRecursive (recursive),
              followSymlinks (follow),
              knownPaths (seenPaths)
    {
        // you have to specify the type of files you're looking for!
        jassert ((whatToLookFor & (File::findFiles | File::findDirectories)) != 0);
        jassert (whatToLookFor > 0 && whatToLookFor <= 7);
 
        if (followSymlinks == File::FollowSymlinks::noCycles)
        {
            if (knownPaths == nullptr)
            {
                heapKnownPaths = std::make_unique<KnownPaths>();
                knownPaths = heapKnownPaths.get();
            }
 
            knownPaths->insert (directory);
        }
    }
 
    //==============================================================================
    struct NativeIterator
    {
        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;
        std::unique_ptr<Pimpl> pimpl;
 
        JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (NativeIterator)
    };
 
    StringArray wildCards;
    NativeIterator fileFinder;
    String wildCard, path;
    int index = -1;
    mutable int totalNumFiles = -1;
    const int whatToLookFor;
    const bool isRecursive;
    bool hasBeenAdvanced = false;
    std::unique_ptr<DirectoryIterator> subIterator;
    File currentFile;
    File::FollowSymlinks followSymlinks = File::FollowSymlinks::yes;
    KnownPaths* knownPaths = nullptr;
    std::unique_ptr<KnownPaths> heapKnownPaths;
 
    static StringArray parseWildcards (const String& pattern);
    static bool fileMatches (const StringArray& wildCards, const String& filename);
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (DirectoryIterator)
};
 
#endif
 
} // namespace juce