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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_FileLocation_h
#define mozilla_FileLocation_h
#include "nsString.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsIFile.h"
#include "FileUtils.h"
class nsZipArchive;
class nsZipItem;
namespace mozilla {
class FileLocation
{
public:
/**
* FileLocation is an helper to handle different kind of file locations
* within Gecko:
* - on filesystems
* - in archives
* - in archives within archives
* As such, it stores a path within an archive, as well as the archive
* path itself, or the complete file path alone when on a filesystem.
* When the archive is in an archive, an nsZipArchive is stored instead
* of a file path.
*/
FileLocation();
~FileLocation();
/**
* Constructor for plain files
*/
explicit FileLocation(nsIFile* aFile);
/**
* Constructors for path within an archive. The archive can be given either
* as nsIFile or nsZipArchive.
*/
FileLocation(nsIFile* aZip, const char* aPath);
FileLocation(nsZipArchive* aZip, const char* aPath);
/**
* Creates a new file location relative to another one.
*/
FileLocation(const FileLocation& aFile, const char* aPath = nullptr);
/**
* Initialization functions corresponding to constructors
*/
void Init(nsIFile* aFile);
void Init(nsIFile* aZip, const char* aPath);
void Init(nsZipArchive* aZip, const char* aPath);
/**
* Returns an URI string corresponding to the file location
*/
void GetURIString(nsACString& aResult) const;
/**
* Returns the base file of the location, where base file is defined as:
* - The file itself when the location is on a filesystem
* - The archive file when the location is in an archive
* - The outer archive file when the location is in an archive in an archive
*/
already_AddRefed<nsIFile> GetBaseFile();
/**
* Returns whether the "base file" (see GetBaseFile) is an archive
*/
bool IsZip() const { return !mPath.IsEmpty(); }
/**
* Returns the path within the archive, when within an archive
*/
void GetPath(nsACString& aResult) const { aResult = mPath; }
/**
* Boolean value corresponding to whether the file location is initialized
* or not.
*/
explicit operator bool() const { return mBaseFile || mBaseZip; }
/**
* Returns whether another FileLocation points to the same resource
*/
bool Equals(const FileLocation& aFile) const;
/**
* Data associated with a FileLocation.
*/
class Data
{
public:
/**
* Returns the data size
*/
nsresult GetSize(uint32_t* aResult);
/**
* Copies the data in the given buffer
*/
nsresult Copy(char* aBuf, uint32_t aLen);
protected:
friend class FileLocation;
nsZipItem* mItem;
RefPtr<nsZipArchive> mZip;
mozilla::AutoFDClose mFd;
};
/**
* Returns the data associated with the resource pointed at by the file
* location.
*/
nsresult GetData(Data& aData);
private:
nsCOMPtr<nsIFile> mBaseFile;
RefPtr<nsZipArchive> mBaseZip;
nsCString mPath;
}; /* class FileLocation */
} /* namespace mozilla */
#endif /* mozilla_FileLocation_h */
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