1 /*

     2 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 #include "util.h"

    20 #include <centralrepository.h>

    21 

    22 _LIT(KDaylightSavingsMinFormat, "%F%Y0224:");

    23 _LIT(KDaylightSavingsMaxFormat, "%F%Y0924:");

    24 

    25 void Util::SetAppropriateTimezoneL()

    26 	{

    27 	TUid repUid = {0x1020e4d3};

    28 	CRepository* rep = CRepository::NewLC(repUid);

    29 	

    30 	// Set the date format to European

    31 	User::LeaveIfError(rep->StartTransaction(CRepository::EConcurrentReadWriteTransaction));

    32 	User::LeaveIfError(rep->Set(101, EDateEuropean)); // 101 is the date format reg entry

    33 	TUint32 keys(0);

    34 	User::LeaveIfError(rep->CommitTransaction(keys));

    35 	

    36 	CleanupStack::PopAndDestroy(rep);

    37 	

    38 	TExtendedLocale locale;

    39 	locale.LoadSystemSettings();

    40 	locale.GetLocale()->SetDateFormat(EDateEuropean);

    41 	User::LeaveIfError(locale.SaveSystemSettings());

    42 	}

    43 

    44 TBool Util::DaylightSavingsAppliesL(const TTime& utc)

    45 	{

    46 	

    47 	// This algorithm needs the first day of the week to be monday

    48 	

    49 	TDay oldStart;

    50 	

    51 	TLocale set;

    52 	oldStart = set.StartOfWeek();

    53 	set.SetStartOfWeek(EMonday);

    54 	set.Set();

    55 	

    56 	TBuf<9> min;

    57 	TBuf<9> max;

    58 	

    59 	utc.FormatL(min, KDaylightSavingsMinFormat);

    60 	utc.FormatL(max, KDaylightSavingsMaxFormat);

    61 	

    62 	// Get times representing the first/last possible day of this 

    63 	// year that daylight savings time change could change on

    64 	

    65 	TTime timeMin;

    66 	User::LeaveIfError(timeMin.Set(min));

    67 	TTime timeMax;

    68 	User::LeaveIfError(timeMax.Set(max));

    69 

    70 	// Find the last sunday in the respective months

    71 	

    72 	TTimeIntervalDays addMin(6 - timeMin.DayNoInWeek());

    73 	TTimeIntervalDays addMax(6 - timeMax.DayNoInWeek());

    74 	

    75 	timeMin += addMin;

    76 	timeMax += addMax;

    77 	

    78 	// The change happens at 1AM.

    79 	TTimeIntervalHours hour(1);

    80 	timeMin += hour;

    81 	timeMax += hour;

    82 	

    83 	// Now we know which day the change occurs on.

    84 	// Compare it to what the UTC is.

    85 

    86 	TBool result = ((timeMin <= utc) && (timeMax > utc));

    87 	

    88 	// reset the first week day

    89 	set.SetStartOfWeek(oldStart);

    90 	set.Set();

    91 	

    92 	return result;

    93 	

    94 	}