1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/* -*- 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_Omnijar_h
#define mozilla_Omnijar_h
#include "nscore.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsIFile.h"
#include "nsZipArchive.h"
#include "mozilla/StaticPtr.h"
namespace mozilla {
class Omnijar
{
private:
/**
* Store an nsIFile for an omni.jar. We can store two paths here, one
* for GRE (corresponding to resource://gre/) and one for APP
* (corresponding to resource:/// and resource://app/), but only
* store one when both point to the same location (unified).
*/
static StaticRefPtr<nsIFile> sPath[2];
/**
* Cached nsZipArchives for the corresponding sPath
*/
static StaticRefPtr<nsZipArchive> sReader[2];
/**
* Cached nsZipArchives for the outer jar, when using nested jars.
* Otherwise nullptr.
*/
static StaticRefPtr<nsZipArchive> sOuterReader[2];
/**
* Has Omnijar::Init() been called?
*/
static bool sInitialized;
/**
* Is using unified GRE/APP jar?
*/
static bool sIsUnified;
public:
enum Type
{
GRE = 0,
APP = 1
};
private:
/**
* Returns whether we are using nested jars.
*/
static inline bool IsNested(Type aType)
{
MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
return !!sOuterReader[aType];
}
/**
* Returns a nsZipArchive pointer for the outer jar file when using nested
* jars. Returns nullptr in the same cases GetPath() would, or if not using
* nested jars.
*/
static inline already_AddRefed<nsZipArchive> GetOuterReader(Type aType)
{
MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
RefPtr<nsZipArchive> reader = sOuterReader[aType].get();
return reader.forget();
}
public:
/**
* Returns whether SetBase has been called at least once with
* a valid nsIFile
*/
static inline bool IsInitialized() { return sInitialized; }
/**
* Initializes the Omnijar API with the given directory or file for GRE and
* APP. Each of the paths given can be:
* - a file path, pointing to the omnijar file,
* - a directory path, pointing to a directory containing an "omni.jar" file,
* - nullptr for autodetection of an "omni.jar" file.
*/
static void Init(nsIFile* aGrePath = nullptr, nsIFile* aAppPath = nullptr);
/**
* Cleans up the Omnijar API
*/
static void CleanUp();
/**
* Returns an nsIFile pointing to the omni.jar file for GRE or APP.
* Returns nullptr when there is no corresponding omni.jar.
* Also returns nullptr for APP in the unified case.
*/
static inline already_AddRefed<nsIFile> GetPath(Type aType)
{
MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
nsCOMPtr<nsIFile> path = sPath[aType].get();
return path.forget();
}
/**
* Returns whether GRE or APP use an omni.jar. Returns PR_False for
* APP when using an omni.jar in the unified case.
*/
static inline bool HasOmnijar(Type aType)
{
MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
return !!sPath[aType];
}
/**
* Returns a nsZipArchive pointer for the omni.jar file for GRE or
* APP. Returns nullptr in the same cases GetPath() would.
*/
static inline already_AddRefed<nsZipArchive> GetReader(Type aType)
{
MOZ_ASSERT(IsInitialized(), "Omnijar not initialized");
RefPtr<nsZipArchive> reader = sReader[aType].get();
return reader.forget();
}
/**
* Returns a nsZipArchive pointer for the given path IAOI the given
* path is the omni.jar for either GRE or APP.
*/
static already_AddRefed<nsZipArchive> GetReader(nsIFile* aPath);
/**
* Returns the URI string corresponding to the omni.jar or directory
* for GRE or APP. i.e. jar:/path/to/omni.jar!/ for omni.jar and
* /path/to/base/dir/ otherwise. Returns an empty string for APP in
* the unified case.
* The returned URI is guaranteed to end with a slash.
*/
static nsresult GetURIString(Type aType, nsACString& aResult);
private:
/**
* Used internally, respectively by Init() and CleanUp()
*/
static void InitOne(nsIFile* aPath, Type aType);
static void CleanUpOne(Type aType);
}; /* class Omnijar */
} /* namespace mozilla */
#endif /* mozilla_Omnijar_h */
|
