dom/time/TimeChangeObserver.cpp@6474c204b198 (annotated)
dom/time/TimeChangeObserver.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 4 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "TimeChangeObserver.h" |
| michael@0 | 7 | #include "mozilla/Hal.h" |
| michael@0 | 8 | #include "mozilla/Observer.h" |
| michael@0 | 9 | #include "mozilla/HalTypes.h" |
| michael@0 | 10 | #include "nsWeakPtr.h" |
| michael@0 | 11 | #include "nsTObserverArray.h" |
| michael@0 | 12 | #include "mozilla/ClearOnShutdown.h" |
| michael@0 | 13 | #include "mozilla/Services.h" |
| michael@0 | 14 | #include "mozilla/StaticPtr.h" |
| michael@0 | 15 | #include "nsPIDOMWindow.h" |
| michael@0 | 16 | #include "nsContentUtils.h" |
| michael@0 | 17 | #include "nsIObserverService.h" |
| michael@0 | 18 | #include "nsIDocument.h" |
| michael@0 | 19 | |
| michael@0 | 20 | using namespace mozilla; |
| michael@0 | 21 | using namespace mozilla::hal; |
| michael@0 | 22 | using namespace mozilla::services; |
| michael@0 | 23 | |
| michael@0 | 24 | class nsSystemTimeChangeObserver : public SystemClockChangeObserver, |
| michael@0 | 25 | public SystemTimezoneChangeObserver |
| michael@0 | 26 | { |
| michael@0 | 27 | typedef nsTObserverArray<nsWeakPtr> ListenerArray; |
| michael@0 | 28 | public: |
| michael@0 | 29 | static nsSystemTimeChangeObserver* GetInstance(); |
| michael@0 | 30 | virtual ~nsSystemTimeChangeObserver(); |
| michael@0 | 31 | |
| michael@0 | 32 | // Implementing hal::SystemClockChangeObserver::Notify() |
| michael@0 | 33 | void Notify(const int64_t& aClockDeltaMS); |
| michael@0 | 34 | |
| michael@0 | 35 | // Implementing hal::SystemTimezoneChangeObserver::Notify() |
| michael@0 | 36 | void Notify( |
| michael@0 | 37 | const mozilla::hal::SystemTimezoneChangeInformation& aSystemTimezoneChangeInfo); |
| michael@0 | 38 | |
| michael@0 | 39 | nsresult AddWindowListenerImpl(nsPIDOMWindow* aWindow); |
| michael@0 | 40 | nsresult RemoveWindowListenerImpl(nsPIDOMWindow* aWindow); |
| michael@0 | 41 | |
| michael@0 | 42 | private: |
| michael@0 | 43 | nsSystemTimeChangeObserver() { }; |
| michael@0 | 44 | ListenerArray mWindowListeners; |
| michael@0 | 45 | void FireMozTimeChangeEvent(); |
| michael@0 | 46 | }; |
| michael@0 | 47 | |
| michael@0 | 48 | StaticAutoPtr<nsSystemTimeChangeObserver> sObserver; |
| michael@0 | 49 | |
| michael@0 | 50 | nsSystemTimeChangeObserver* nsSystemTimeChangeObserver::GetInstance() |
| michael@0 | 51 | { |
| michael@0 | 52 | if (!sObserver) { |
| michael@0 | 53 | sObserver = new nsSystemTimeChangeObserver(); |
| michael@0 | 54 | ClearOnShutdown(&sObserver); |
| michael@0 | 55 | } |
| michael@0 | 56 | return sObserver; |
| michael@0 | 57 | } |
| michael@0 | 58 | |
| michael@0 | 59 | nsSystemTimeChangeObserver::~nsSystemTimeChangeObserver() |
| michael@0 | 60 | { |
| michael@0 | 61 | UnregisterSystemClockChangeObserver(this); |
| michael@0 | 62 | UnregisterSystemTimezoneChangeObserver(this); |
| michael@0 | 63 | } |
| michael@0 | 64 | |
| michael@0 | 65 | void |
| michael@0 | 66 | nsSystemTimeChangeObserver::FireMozTimeChangeEvent() |
| michael@0 | 67 | { |
| michael@0 | 68 | ListenerArray::ForwardIterator iter(mWindowListeners); |
| michael@0 | 69 | while (iter.HasMore()) { |
| michael@0 | 70 | nsWeakPtr weakWindow = iter.GetNext(); |
| michael@0 | 71 | nsCOMPtr<nsPIDOMWindow> innerWindow = do_QueryReferent(weakWindow); |
| michael@0 | 72 | nsCOMPtr<nsPIDOMWindow> outerWindow; |
| michael@0 | 73 | nsCOMPtr<nsIDocument> document; |
| michael@0 | 74 | if (!innerWindow || |
| michael@0 | 75 | !(document = innerWindow->GetExtantDoc()) || |
| michael@0 | 76 | !(outerWindow = innerWindow->GetOuterWindow())) { |
| michael@0 | 77 | mWindowListeners.RemoveElement(weakWindow); |
| michael@0 | 78 | continue; |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | nsContentUtils::DispatchTrustedEvent(document, outerWindow, |
| michael@0 | 82 | NS_LITERAL_STRING("moztimechange"), /* bubbles = */ true, |
| michael@0 | 83 | /* canceable = */ false); |
| michael@0 | 84 | } |
| michael@0 | 85 | } |
| michael@0 | 86 | |
| michael@0 | 87 | void |
| michael@0 | 88 | nsSystemTimeChangeObserver::Notify(const int64_t& aClockDeltaMS) |
| michael@0 | 89 | { |
| michael@0 | 90 | // Notify observers that the system clock has been adjusted. |
| michael@0 | 91 | nsCOMPtr<nsIObserverService> observerService = GetObserverService(); |
| michael@0 | 92 | if (observerService) { |
| michael@0 | 93 | nsString dataStr; |
| michael@0 | 94 | dataStr.AppendFloat(static_cast<double>(aClockDeltaMS)); |
| michael@0 | 95 | observerService->NotifyObservers( |
| michael@0 | 96 | nullptr, "system-clock-change", dataStr.get()); |
| michael@0 | 97 | } |
| michael@0 | 98 | |
| michael@0 | 99 | FireMozTimeChangeEvent(); |
| michael@0 | 100 | } |
| michael@0 | 101 | |
| michael@0 | 102 | void |
| michael@0 | 103 | nsSystemTimeChangeObserver::Notify( |
| michael@0 | 104 | const SystemTimezoneChangeInformation& aSystemTimezoneChangeInfo) |
| michael@0 | 105 | { |
| michael@0 | 106 | FireMozTimeChangeEvent(); |
| michael@0 | 107 | } |
| michael@0 | 108 | |
| michael@0 | 109 | nsresult |
| michael@0 | 110 | mozilla::time::AddWindowListener(nsPIDOMWindow* aWindow) |
| michael@0 | 111 | { |
| michael@0 | 112 | return nsSystemTimeChangeObserver::GetInstance()->AddWindowListenerImpl(aWindow); |
| michael@0 | 113 | } |
| michael@0 | 114 | |
| michael@0 | 115 | nsresult |
| michael@0 | 116 | nsSystemTimeChangeObserver::AddWindowListenerImpl(nsPIDOMWindow* aWindow) |
| michael@0 | 117 | { |
| michael@0 | 118 | if (!aWindow) { |
| michael@0 | 119 | return NS_ERROR_ILLEGAL_VALUE; |
| michael@0 | 120 | } |
| michael@0 | 121 | |
| michael@0 | 122 | if (aWindow->IsOuterWindow()) { |
| michael@0 | 123 | aWindow = aWindow->GetCurrentInnerWindow(); |
| michael@0 | 124 | if (!aWindow) { |
| michael@0 | 125 | return NS_ERROR_FAILURE; |
| michael@0 | 126 | } |
| michael@0 | 127 | } |
| michael@0 | 128 | |
| michael@0 | 129 | nsWeakPtr windowWeakRef = do_GetWeakReference(aWindow); |
| michael@0 | 130 | NS_ASSERTION(windowWeakRef, "nsIDOMWindow implementations shuld support weak ref"); |
| michael@0 | 131 | |
| michael@0 | 132 | if (mWindowListeners.IndexOf(windowWeakRef) != |
| michael@0 | 133 | ListenerArray::array_type::NoIndex) { |
| michael@0 | 134 | return NS_OK; |
| michael@0 | 135 | } |
| michael@0 | 136 | |
| michael@0 | 137 | if (mWindowListeners.IsEmpty()) { |
| michael@0 | 138 | RegisterSystemClockChangeObserver(sObserver); |
| michael@0 | 139 | RegisterSystemTimezoneChangeObserver(sObserver); |
| michael@0 | 140 | } |
| michael@0 | 141 | |
| michael@0 | 142 | mWindowListeners.AppendElement(windowWeakRef); |
| michael@0 | 143 | return NS_OK; |
| michael@0 | 144 | } |
| michael@0 | 145 | |
| michael@0 | 146 | nsresult |
| michael@0 | 147 | mozilla::time::RemoveWindowListener(nsPIDOMWindow* aWindow) |
| michael@0 | 148 | { |
| michael@0 | 149 | if (!sObserver) { |
| michael@0 | 150 | return NS_OK; |
| michael@0 | 151 | } |
| michael@0 | 152 | |
| michael@0 | 153 | return nsSystemTimeChangeObserver::GetInstance()->RemoveWindowListenerImpl(aWindow); |
| michael@0 | 154 | } |
| michael@0 | 155 | |
| michael@0 | 156 | nsresult |
| michael@0 | 157 | nsSystemTimeChangeObserver::RemoveWindowListenerImpl(nsPIDOMWindow* aWindow) |
| michael@0 | 158 | { |
| michael@0 | 159 | if (!aWindow) { |
| michael@0 | 160 | return NS_OK; |
| michael@0 | 161 | } |
| michael@0 | 162 | |
| michael@0 | 163 | if (aWindow->IsOuterWindow()) { |
| michael@0 | 164 | aWindow = aWindow->GetCurrentInnerWindow(); |
| michael@0 | 165 | if (!aWindow) { |
| michael@0 | 166 | return NS_ERROR_FAILURE; |
| michael@0 | 167 | } |
| michael@0 | 168 | } |
| michael@0 | 169 | |
| michael@0 | 170 | nsWeakPtr windowWeakRef = do_GetWeakReference(aWindow); |
| michael@0 | 171 | mWindowListeners.RemoveElement(windowWeakRef); |
| michael@0 | 172 | |
| michael@0 | 173 | if (mWindowListeners.IsEmpty()) { |
| michael@0 | 174 | UnregisterSystemClockChangeObserver(sObserver); |
| michael@0 | 175 | UnregisterSystemTimezoneChangeObserver(sObserver); |
| michael@0 | 176 | } |
| michael@0 | 177 | |
| michael@0 | 178 | return NS_OK; |
| michael@0 | 179 | } |
