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126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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_Omnijar_h
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#define mozilla_Omnijar_h
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#include "nscore.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "nsIFile.h"
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#include "nsZipArchive.h"
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class nsIURI;
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namespace mozilla {
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class Omnijar
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{
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private:
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/**
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* Store an nsIFile for an omni.jar. We can store two paths here, one
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* for GRE (corresponding to resource://gre/) and one for APP
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* (corresponding to resource:/// and resource://app/), but only
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* store one when both point to the same location (unified).
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*/
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static nsIFile* sPath[2];
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/**
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* Cached nsZipArchives for the corresponding sPath
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*/
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static nsZipArchive* sReader[2];
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/**
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* Has Omnijar::Init() been called?
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*/
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static bool sInitialized;
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public:
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enum Type
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{
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GRE = 0,
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APP = 1
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};
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/**
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* Returns whether SetBase has been called at least once with
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* a valid nsIFile
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*/
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static inline bool IsInitialized() { return sInitialized; }
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/**
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* Initializes the Omnijar API with the given directory or file for GRE and
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* APP. Each of the paths given can be:
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* - a file path, pointing to the omnijar file,
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* - a directory path, pointing to a directory containing an "omni.jar" file,
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* - nullptr for autodetection of an "omni.jar" file.
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*/
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static void Init(nsIFile* aGrePath = nullptr, nsIFile* aAppPath = nullptr);
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/**
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* Cleans up the Omnijar API
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*/
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static void CleanUp();
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/**
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* Returns an nsIFile pointing to the omni.jar file for GRE or APP.
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* Returns nullptr when there is no corresponding omni.jar.
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* Also returns nullptr for APP in the unified case.
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*/
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static inline already_AddRefed<nsIFile> GetPath(Type aType)
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{
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MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
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nsCOMPtr<nsIFile> path = sPath[aType];
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return path.forget();
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}
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/**
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* Returns whether GRE or APP use an omni.jar. Returns PR_False for
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* APP when using an omni.jar in the unified case.
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*/
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static inline bool HasOmnijar(Type aType)
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{
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MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
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return !!sPath[aType];
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}
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/**
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* Returns a nsZipArchive pointer for the omni.jar file for GRE or
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* APP. Returns nullptr in the same cases GetPath() would.
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*/
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static inline already_AddRefed<nsZipArchive> GetReader(Type aType)
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{
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MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
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nsRefPtr<nsZipArchive> reader = sReader[aType];
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return reader.forget();
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}
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/**
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* Returns a nsZipArchive pointer for the given path IAOI the given
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* path is the omni.jar for either GRE or APP.
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*/
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static already_AddRefed<nsZipArchive> GetReader(nsIFile* aPath);
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/**
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* Returns the URI string corresponding to the omni.jar or directory
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* for GRE or APP. i.e. jar:/path/to/omni.jar!/ for omni.jar and
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* /path/to/base/dir/ otherwise. Returns an empty string for APP in
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* the unified case.
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* The returned URI is guaranteed to end with a slash.
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*/
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static nsresult GetURIString(Type aType, nsACString& aResult);
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private:
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/**
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* Used internally, respectively by Init() and CleanUp()
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*/
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static void InitOne(nsIFile* aPath, Type aType);
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static void CleanUpOne(Type aType);
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}; /* class Omnijar */
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} /* namespace mozilla */
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#endif /* mozilla_Omnijar_h */
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