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