Source/modules/filesystem/DOMFilePath.h

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * this software without specific prior written permission.
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#ifndef DOMFilePath_h
#define DOMFilePath_h

#include "wtf/text/WTFString.h"

namespace blink {

// DOMFileSystem path utilities. All methods in this class are static.
class DOMFilePath {
public:
    static const char separator;
    static const char root[];

    // Returns the name part from the given path.
    static String getName(const String& path);

    // Returns the parent directory path of the given path.
    static String getDirectory(const String& path);

    // Checks if a given path is a parent of mayBeChild. This method assumes given paths are absolute and do not have extra references to a parent (i.e. "../").
    static bool isParentOf(const String& path, const String& mayBeChild);

    // Appends the separator at the end of the path if it's not there already.
    static String ensureDirectoryPath(const String& path);

    // Returns a new path by appending a separator and the supplied path component to the path.
    static String append(const String& path, const String& component);

    static bool isAbsolute(const String& path)
    {
        return path.startsWith(DOMFilePath::root);
    }

    static bool endsWithSeparator(const String& path)
    {
        return path[path.length() - 1] == DOMFilePath::separator;
    }

    // Evaluates all "../" and "./" segments. Note that "/../" expands to "/", so you can't ever refer to anything above the root directory.
    static String removeExtraParentReferences(const String& path);

    // Checks if the given path follows the FileSystem API naming restrictions.
    static bool isValidPath(const String& path);

    // Checks if the given name follows the FileSystem API naming restrictions.
    static bool isValidName(const String& name);

private:
    DOMFilePath() { }
};

} // namespace blink

#endif // DOMFilePath_h