mirror of
https://github.com/mozilla/gecko-dev.git
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152 lines
3.9 KiB
C++
152 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "TimeChangeObserver.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "mozilla/Services.h"
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#include "mozilla/StaticPtr.h"
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#include "nsPIDOMWindow.h"
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#include "nsDOMEvent.h"
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#include "nsContentUtils.h"
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#include "nsIObserverService.h"
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#include "nsIDocument.h"
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using namespace mozilla;
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using namespace mozilla::hal;
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using namespace mozilla::services;
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StaticAutoPtr<nsSystemTimeChangeObserver> sObserver;
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nsSystemTimeChangeObserver* nsSystemTimeChangeObserver::GetInstance()
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{
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if (!sObserver) {
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sObserver = new nsSystemTimeChangeObserver();
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ClearOnShutdown(&sObserver);
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}
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return sObserver;
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}
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nsSystemTimeChangeObserver::~nsSystemTimeChangeObserver()
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{
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UnregisterSystemClockChangeObserver(this);
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UnregisterSystemTimezoneChangeObserver(this);
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}
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void
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nsSystemTimeChangeObserver::FireMozTimeChangeEvent()
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{
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ListenerArray::ForwardIterator iter(mWindowListeners);
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while (iter.HasMore()) {
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nsWeakPtr weakWindow = iter.GetNext();
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nsCOMPtr<nsPIDOMWindow> innerWindow = do_QueryReferent(weakWindow);
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nsCOMPtr<nsPIDOMWindow> outerWindow;
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nsCOMPtr<nsIDocument> document;
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if (!innerWindow ||
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!(document = innerWindow->GetExtantDoc()) ||
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!(outerWindow = innerWindow->GetOuterWindow())) {
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mWindowListeners.RemoveElement(weakWindow);
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continue;
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}
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nsContentUtils::DispatchTrustedEvent(document, outerWindow,
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NS_LITERAL_STRING("moztimechange"), /* bubbles = */ true,
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/* canceable = */ false);
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}
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}
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void
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nsSystemTimeChangeObserver::Notify(const int64_t& aClockDeltaMS)
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{
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// Notify observers that the system clock has been adjusted.
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nsCOMPtr<nsIObserverService> observerService = GetObserverService();
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if (observerService) {
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nsString dataStr;
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dataStr.AppendFloat(static_cast<double>(aClockDeltaMS));
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observerService->NotifyObservers(
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nullptr, "system-clock-change", dataStr.get());
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}
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FireMozTimeChangeEvent();
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}
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void
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nsSystemTimeChangeObserver::Notify(
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const SystemTimezoneChangeInformation& aSystemTimezoneChangeInfo)
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{
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FireMozTimeChangeEvent();
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}
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nsresult
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nsSystemTimeChangeObserver::AddWindowListener(nsPIDOMWindow* aWindow)
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{
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return GetInstance()->AddWindowListenerImpl(aWindow);
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}
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nsresult
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nsSystemTimeChangeObserver::AddWindowListenerImpl(nsPIDOMWindow* aWindow)
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{
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if (!aWindow) {
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return NS_ERROR_ILLEGAL_VALUE;
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}
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if (aWindow->IsOuterWindow()) {
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aWindow = aWindow->GetCurrentInnerWindow();
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if (!aWindow) {
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return NS_ERROR_FAILURE;
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}
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}
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nsWeakPtr windowWeakRef = do_GetWeakReference(aWindow);
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NS_ASSERTION(windowWeakRef, "nsIDOMWindow implementations shuld support weak ref");
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if (mWindowListeners.IndexOf(windowWeakRef) !=
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ListenerArray::array_type::NoIndex) {
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return NS_OK;
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}
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if (mWindowListeners.IsEmpty()) {
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RegisterSystemClockChangeObserver(sObserver);
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RegisterSystemTimezoneChangeObserver(sObserver);
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}
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mWindowListeners.AppendElement(windowWeakRef);
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return NS_OK;
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}
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nsresult
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nsSystemTimeChangeObserver::RemoveWindowListener(nsPIDOMWindow* aWindow)
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{
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if (!sObserver) {
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return NS_OK;
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}
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return GetInstance()->RemoveWindowListenerImpl(aWindow);
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}
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nsresult
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nsSystemTimeChangeObserver::RemoveWindowListenerImpl(nsPIDOMWindow* aWindow)
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{
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if (!aWindow) {
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return NS_OK;
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}
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if (aWindow->IsOuterWindow()) {
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aWindow = aWindow->GetCurrentInnerWindow();
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if (!aWindow) {
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return NS_ERROR_FAILURE;
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}
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}
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nsWeakPtr windowWeakRef = do_GetWeakReference(aWindow);
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mWindowListeners.RemoveElement(windowWeakRef);
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if (mWindowListeners.IsEmpty()) {
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UnregisterSystemClockChangeObserver(sObserver);
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UnregisterSystemTimezoneChangeObserver(sObserver);
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}
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return NS_OK;
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}
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