sl@0: /*
sl@0: * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #include "util.h"
sl@0: #include <centralrepository.h>
sl@0: 
sl@0: _LIT(KDaylightSavingsMinFormat, "%F%Y0224:");
sl@0: _LIT(KDaylightSavingsMaxFormat, "%F%Y0924:");
sl@0: 
sl@0: void Util::SetAppropriateTimezoneL()
sl@0: 	{
sl@0: 	TUid repUid = {0x1020e4d3};
sl@0: 	CRepository* rep = CRepository::NewLC(repUid);
sl@0: 	
sl@0: 	// Set the date format to European
sl@0: 	User::LeaveIfError(rep->StartTransaction(CRepository::EConcurrentReadWriteTransaction));
sl@0: 	User::LeaveIfError(rep->Set(101, EDateEuropean)); // 101 is the date format reg entry
sl@0: 	TUint32 keys(0);
sl@0: 	User::LeaveIfError(rep->CommitTransaction(keys));
sl@0: 	
sl@0: 	CleanupStack::PopAndDestroy(rep);
sl@0: 	
sl@0: 	TExtendedLocale locale;
sl@0: 	locale.LoadSystemSettings();
sl@0: 	locale.GetLocale()->SetDateFormat(EDateEuropean);
sl@0: 	User::LeaveIfError(locale.SaveSystemSettings());
sl@0: 	}
sl@0: 
sl@0: TBool Util::DaylightSavingsAppliesL(const TTime& utc)
sl@0: 	{
sl@0: 	
sl@0: 	// This algorithm needs the first day of the week to be monday
sl@0: 	
sl@0: 	TDay oldStart;
sl@0: 	
sl@0: 	TLocale set;
sl@0: 	oldStart = set.StartOfWeek();
sl@0: 	set.SetStartOfWeek(EMonday);
sl@0: 	set.Set();
sl@0: 	
sl@0: 	TBuf<9> min;
sl@0: 	TBuf<9> max;
sl@0: 	
sl@0: 	utc.FormatL(min, KDaylightSavingsMinFormat);
sl@0: 	utc.FormatL(max, KDaylightSavingsMaxFormat);
sl@0: 	
sl@0: 	// Get times representing the first/last possible day of this 
sl@0: 	// year that daylight savings time change could change on
sl@0: 	
sl@0: 	TTime timeMin;
sl@0: 	User::LeaveIfError(timeMin.Set(min));
sl@0: 	TTime timeMax;
sl@0: 	User::LeaveIfError(timeMax.Set(max));
sl@0: 
sl@0: 	// Find the last sunday in the respective months
sl@0: 	
sl@0: 	TTimeIntervalDays addMin(6 - timeMin.DayNoInWeek());
sl@0: 	TTimeIntervalDays addMax(6 - timeMax.DayNoInWeek());
sl@0: 	
sl@0: 	timeMin += addMin;
sl@0: 	timeMax += addMax;
sl@0: 	
sl@0: 	// The change happens at 1AM.
sl@0: 	TTimeIntervalHours hour(1);
sl@0: 	timeMin += hour;
sl@0: 	timeMax += hour;
sl@0: 	
sl@0: 	// Now we know which day the change occurs on.
sl@0: 	// Compare it to what the UTC is.
sl@0: 
sl@0: 	TBool result = ((timeMin <= utc) && (timeMax > utc));
sl@0: 	
sl@0: 	// reset the first week day
sl@0: 	set.SetStartOfWeek(oldStart);
sl@0: 	set.Set();
sl@0: 	
sl@0: 	return result;
sl@0: 	
sl@0: 	}