зеркало из https://github.com/mozilla/gecko-dev.git
135 строки
3.4 KiB
C++
135 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* 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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explicit FileLocation(nsIFile* aFile);
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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* aZip, const char* aPath);
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FileLocation(nsZipArchive* aZip, const char* aPath);
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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& aFile, const char* aPath = 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* aFile);
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void Init(nsIFile* aZip, const char* aPath);
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void Init(nsZipArchive* aZip, const char* aPath);
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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& aResult) 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 { return !mPath.IsEmpty(); }
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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& aResult) const { aResult = mPath; }
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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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explicit operator bool() const { return mBaseFile || mBaseZip; }
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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& aFile) 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* aResult);
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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* aBuf, uint32_t aLen);
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protected:
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friend class FileLocation;
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nsZipItem* mItem;
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RefPtr<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& aData);
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private:
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nsCOMPtr<nsIFile> mBaseFile;
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RefPtr<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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