1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/chromeos/cros/screen_lock_library.h"
6
7 #include "base/message_loop.h"
8 #include "base/string_util.h"
9 #include "chrome/browser/chromeos/cros/cros_library.h"
10 #include "content/browser/browser_thread.h"
11
12 namespace chromeos {
13
14 // This class handles the interaction with the ChromeOS screen lock APIs.
15 class ScreenLockLibraryImpl : public ScreenLockLibrary {
16 public:
ScreenLockLibraryImpl()17 ScreenLockLibraryImpl() {
18 if (CrosLibrary::Get()->EnsureLoaded()) {
19 Init();
20 }
21 }
22
~ScreenLockLibraryImpl()23 ~ScreenLockLibraryImpl() {
24 if (screen_lock_connection_) {
25 chromeos::DisconnectScreenLock(screen_lock_connection_);
26 }
27 }
28
AddObserver(Observer * observer)29 void AddObserver(Observer* observer) {
30 observers_.AddObserver(observer);
31 }
32
RemoveObserver(Observer * observer)33 void RemoveObserver(Observer* observer) {
34 observers_.RemoveObserver(observer);
35 }
36
NotifyScreenLockRequested()37 void NotifyScreenLockRequested() {
38 chromeos::NotifyScreenLockRequested();
39 }
40
NotifyScreenLockCompleted()41 void NotifyScreenLockCompleted() {
42 chromeos::NotifyScreenLockCompleted();
43 }
44
NotifyScreenUnlockRequested()45 void NotifyScreenUnlockRequested() {
46 chromeos::NotifyScreenUnlockRequested();
47 }
48
NotifyScreenUnlockCompleted()49 void NotifyScreenUnlockCompleted() {
50 chromeos::NotifyScreenUnlockCompleted();
51 }
52
53 private:
Init()54 void Init() {
55 screen_lock_connection_ = chromeos::MonitorScreenLock(
56 &ScreenLockedHandler, this);
57 }
58
LockScreen()59 void LockScreen() {
60 // Make sure we run on UI thread.
61 if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
62 BrowserThread::PostTask(
63 BrowserThread::UI, FROM_HERE,
64 NewRunnableMethod(this, &ScreenLockLibraryImpl::LockScreen));
65 return;
66 }
67 FOR_EACH_OBSERVER(Observer, observers_, LockScreen(this));
68 }
69
UnlockScreen()70 void UnlockScreen() {
71 // Make sure we run on UI thread.
72 if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
73 BrowserThread::PostTask(
74 BrowserThread::UI, FROM_HERE,
75 NewRunnableMethod(this, &ScreenLockLibraryImpl::UnlockScreen));
76 return;
77 }
78 FOR_EACH_OBSERVER(Observer, observers_, UnlockScreen(this));
79 }
80
UnlockScreenFailed()81 void UnlockScreenFailed() {
82 // Make sure we run on UI thread.
83 if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
84 BrowserThread::PostTask(
85 BrowserThread::UI, FROM_HERE,
86 NewRunnableMethod(this, &ScreenLockLibraryImpl::UnlockScreenFailed));
87 return;
88 }
89 FOR_EACH_OBSERVER(Observer, observers_, UnlockScreenFailed(this));
90 }
91
ScreenLockedHandler(void * object,ScreenLockEvent event)92 static void ScreenLockedHandler(void* object, ScreenLockEvent event) {
93 ScreenLockLibraryImpl* self = static_cast<ScreenLockLibraryImpl*>(object);
94 switch (event) {
95 case chromeos::LockScreen:
96 self->LockScreen();
97 break;
98 case chromeos::UnlockScreen:
99 self->UnlockScreen();
100 break;
101 case chromeos::UnlockScreenFailed:
102 self->UnlockScreenFailed();
103 break;
104 default:
105 NOTREACHED();
106 }
107 }
108
109 ObserverList<Observer> observers_;
110
111 // A reference to the screen lock api
112 chromeos::ScreenLockConnection screen_lock_connection_;
113
114 DISALLOW_COPY_AND_ASSIGN(ScreenLockLibraryImpl);
115 };
116
117 class ScreenLockLibraryStubImpl : public ScreenLockLibrary {
118 public:
ScreenLockLibraryStubImpl()119 ScreenLockLibraryStubImpl() {}
~ScreenLockLibraryStubImpl()120 ~ScreenLockLibraryStubImpl() {}
AddObserver(Observer * observer)121 void AddObserver(Observer* observer) {}
RemoveObserver(Observer * observer)122 void RemoveObserver(Observer* observer) {}
NotifyScreenLockRequested()123 void NotifyScreenLockRequested() {}
NotifyScreenLockCompleted()124 void NotifyScreenLockCompleted() {}
NotifyScreenUnlockRequested()125 void NotifyScreenUnlockRequested() {}
NotifyScreenUnlockCompleted()126 void NotifyScreenUnlockCompleted() {}
127 };
128
129 // static
GetImpl(bool stub)130 ScreenLockLibrary* ScreenLockLibrary::GetImpl(bool stub) {
131 if (stub)
132 return new ScreenLockLibraryStubImpl();
133 else
134 return new ScreenLockLibraryImpl();
135 }
136
137 } // namespace chromeos
138
139 // Allows InvokeLater without adding refcounting. This class is a Singleton and
140 // won't be deleted until it's last InvokeLater is run.
141 DISABLE_RUNNABLE_METHOD_REFCOUNT(chromeos::ScreenLockLibraryImpl);
142