blob: 67f1fe9cae6d02114a6f1faad90da74729656cf7 (
plain)
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
160
161
162
163
164
165
|
/* -*- 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/. */
#include "TimeChangeObserver.h"
#include "mozilla/Hal.h"
#include "mozilla/Observer.h"
#include "mozilla/HalTypes.h"
#include "nsWeakPtr.h"
#include "nsTObserverArray.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPtr.h"
#include "nsPIDOMWindow.h"
#include "nsContentUtils.h"
#include "nsIObserverService.h"
#include "nsIDocument.h"
using namespace mozilla;
using namespace mozilla::hal;
using namespace mozilla::services;
class nsSystemTimeChangeObserver : public SystemClockChangeObserver,
public SystemTimezoneChangeObserver
{
typedef nsTObserverArray<nsWeakPtr> ListenerArray;
public:
static nsSystemTimeChangeObserver* GetInstance();
virtual ~nsSystemTimeChangeObserver();
// Implementing hal::SystemClockChangeObserver::Notify()
void Notify(const int64_t& aClockDeltaMS);
// Implementing hal::SystemTimezoneChangeObserver::Notify()
void Notify(
const mozilla::hal::SystemTimezoneChangeInformation& aSystemTimezoneChangeInfo);
nsresult AddWindowListenerImpl(nsPIDOMWindowInner* aWindow);
nsresult RemoveWindowListenerImpl(nsPIDOMWindowInner* aWindow);
private:
nsSystemTimeChangeObserver() { };
ListenerArray mWindowListeners;
void FireMozTimeChangeEvent();
};
StaticAutoPtr<nsSystemTimeChangeObserver> sObserver;
nsSystemTimeChangeObserver* nsSystemTimeChangeObserver::GetInstance()
{
if (!sObserver) {
sObserver = new nsSystemTimeChangeObserver();
ClearOnShutdown(&sObserver);
}
return sObserver;
}
nsSystemTimeChangeObserver::~nsSystemTimeChangeObserver()
{
UnregisterSystemClockChangeObserver(this);
UnregisterSystemTimezoneChangeObserver(this);
}
void
nsSystemTimeChangeObserver::FireMozTimeChangeEvent()
{
ListenerArray::ForwardIterator iter(mWindowListeners);
while (iter.HasMore()) {
nsWeakPtr weakWindow = iter.GetNext();
nsCOMPtr<nsPIDOMWindowInner> innerWindow = do_QueryReferent(weakWindow);
nsCOMPtr<nsPIDOMWindowOuter> outerWindow;
nsCOMPtr<nsIDocument> document;
if (!innerWindow ||
!(document = innerWindow->GetExtantDoc()) ||
!(outerWindow = innerWindow->GetOuterWindow())) {
mWindowListeners.RemoveElement(weakWindow);
continue;
}
nsContentUtils::DispatchTrustedEvent(document, outerWindow,
NS_LITERAL_STRING("moztimechange"), /* bubbles = */ true,
/* canceable = */ false);
}
}
void
nsSystemTimeChangeObserver::Notify(const int64_t& aClockDeltaMS)
{
// Notify observers that the system clock has been adjusted.
nsCOMPtr<nsIObserverService> observerService = GetObserverService();
if (observerService) {
nsString dataStr;
dataStr.AppendFloat(static_cast<double>(aClockDeltaMS));
observerService->NotifyObservers(
nullptr, "system-clock-change", dataStr.get());
}
FireMozTimeChangeEvent();
}
void
nsSystemTimeChangeObserver::Notify(
const SystemTimezoneChangeInformation& aSystemTimezoneChangeInfo)
{
FireMozTimeChangeEvent();
}
nsresult
mozilla::time::AddWindowListener(nsPIDOMWindowInner* aWindow)
{
return nsSystemTimeChangeObserver::GetInstance()->AddWindowListenerImpl(aWindow);
}
nsresult
nsSystemTimeChangeObserver::AddWindowListenerImpl(nsPIDOMWindowInner* aWindow)
{
if (!aWindow) {
return NS_ERROR_ILLEGAL_VALUE;
}
nsWeakPtr windowWeakRef = do_GetWeakReference(aWindow);
NS_ASSERTION(windowWeakRef, "nsIDOMWindow implementations shuld support weak ref");
if (mWindowListeners.IndexOf(windowWeakRef) !=
ListenerArray::array_type::NoIndex) {
return NS_OK;
}
if (mWindowListeners.IsEmpty()) {
RegisterSystemClockChangeObserver(sObserver);
RegisterSystemTimezoneChangeObserver(sObserver);
}
mWindowListeners.AppendElement(windowWeakRef);
return NS_OK;
}
nsresult
mozilla::time::RemoveWindowListener(nsPIDOMWindowInner* aWindow)
{
if (!sObserver) {
return NS_OK;
}
return nsSystemTimeChangeObserver::GetInstance()->RemoveWindowListenerImpl(aWindow);
}
nsresult
nsSystemTimeChangeObserver::RemoveWindowListenerImpl(nsPIDOMWindowInner* aWindow)
{
if (!aWindow) {
return NS_OK;
}
nsWeakPtr windowWeakRef = do_GetWeakReference(aWindow);
mWindowListeners.RemoveElement(windowWeakRef);
if (mWindowListeners.IsEmpty()) {
UnregisterSystemClockChangeObserver(sObserver);
UnregisterSystemTimezoneChangeObserver(sObserver);
}
return NS_OK;
}
|
