nameswapao.cpp

这一个应用于symbian 操作系统

/*
    This file is part of NameSwap.

    NameSwap is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    NameSwap is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with NameSwap; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

	Copyright (C) 2002 Ashley Montanaro.
*/

#include <NameSwap.rsg>
#include "NameSwap.hrh"
#include "NameSwapAO.h"

// This active object is responsible for swapping names when "swap all" is selected
// by the user. It's required because progress dialogs use an active object which
// needs to be scheduled. All the operations on the contacts database are synchronous,
// so this object just reschedules itself after swapping each contact's names.

CNameSwapAO::CNameSwapAO() : CActive(EPriorityIdle)
	{
	CActiveScheduler::Add(this);
	}

CNameSwapAO::~CNameSwapAO()
	{
	delete iDatabase;
	}

void CNameSwapAO::StartL()
	{
	// Open the database and get all the contacts into a list.
	iDatabase = CContactDatabase::OpenL();
	iContacts = iDatabase->SortedItemsL();

	// Create the progress dialog, specifying that it should be displayed immediately.
	// If this flag isn't passed, it doesn't seem to display at all (?)
	iProgressDialog = new (ELeave) CAknProgressDialog(
                            (REINTERPRET_CAST(CEikDialog**,&iProgressDialog)), ETrue);
	iProgressDialog->PrepareLC(R_PROGRESS_NOTE);

	// Get a handle to the progress info. Must be done after PrepareLC().
    iProgressInfo = iProgressDialog->GetProgressInfoL();

	// Tell the dialog to notify us if the user presses "Cancel".
	iProgressDialog->SetCallback(this);

	// Action!
	iProgressDialog->RunLD();

	iContactIndex = 0;

	// If there are actually any contacts in the DB, start by swapping the first one.
	if (iContacts->Count() > 0)
		{
		SwapContactL(iContactIndex);
		iProgressInfo->SetFinalValue(iContacts->Count() - 1);
		}

	// Reschedule ourselves.
	SetActive();
	TRequestStatus* status = &iStatus;
	User::RequestComplete(status, KErrNone);
	}

void CNameSwapAO::RunL()
	{
	// If there's been an error, bail out straight away.
	User::LeaveIfError(iStatus.Int());

	// Update the progress information.
	iProgressInfo->IncrementAndDraw(1);

	iContactIndex++;

	if (iContactIndex < iContacts->Count())
		{
		// Swap the next contact.
		SwapContactL(iContactIndex);

		// Synchronously compress the database.
		iDatabase->CompactL();

		// Reschedule ourselves.
		SetActive();
		TRequestStatus* status = &iStatus;
		User::RequestComplete(status, KErrNone);
		}
	else
		{
		// Get rid of the progress dialog (deletes it as well).
		iProgressDialog->ProcessFinishedL();

		// Close the database.
		delete iDatabase;
		iDatabase = NULL;
		}
	}

void CNameSwapAO::DoCancel()
	{
	// Synchronously compress the database.
	iDatabase->CompactL();

	delete iDatabase;
	iDatabase = NULL;
	}

TInt CNameSwapAO::RunError(TInt /*aError*/)
	{
	// Synchronously compress the database.
	iDatabase->CompactL();

	delete iDatabase;
	iDatabase = NULL;

	// Just return KErrNone to stop the active scheduler panicking.
	return KErrNone;
	}

void CNameSwapAO::DialogDismissedL(TInt /*aButtonId*/)
	{
	// Cancel anything that's still going on.
	Cancel();
	}

void CNameSwapAO::SwapContactL(TInt aIndex)
	{
	CContactItem* contact;
	HBufC* firstNameBuf;
	HBufC* lastNameBuf;

	// Open the contact, pushing it onto the cleanup stack.
	contact = iDatabase->OpenContactLX((*iContacts)[aIndex]);

	CContactItemFieldSet& fieldSet = contact->CardFields();

	// Get first name.

	TInt index = fieldSet.Find(KUidContactFieldGivenName);

	// Check that the first name field is actually there.
	if ((index < 0) || (index >= fieldSet.Count()))
		{
		CleanupStack::PopAndDestroy(); // contact
		return;
		}

	CContactItemField& firstNameField = fieldSet[index];
	CContactTextField* firstName = firstNameField.TextStorage();

	firstNameBuf = firstName->Text().AllocLC();

	// Get last name.

	index = fieldSet.Find(KUidContactFieldFamilyName);

	// Check that the last name field is actually there.
	if ((index < 0) || (index >= fieldSet.Count()))
		{
		CleanupStack::PopAndDestroy(2); // contact, firstNameBuf
		return;
		}

	CContactItemField& lastNameField = fieldSet[index];
	CContactTextField* lastName = lastNameField.TextStorage();

	lastNameBuf = lastName->Text().AllocLC();

	// If the contact has both first and last names defined, swap the names.
	if ((firstNameBuf->Length() > 0) && ((*firstNameBuf) != KSpace) &&
		(lastNameBuf->Length() > 0) && ((*lastNameBuf) != KSpace))
		{
		// Note that the contacts DB takes ownership of the HBufC's we pass in,
		// so we don't need to delete them.
		firstName->SetText(lastNameBuf);
		lastName->SetText(firstNameBuf);

		// Action! Note that this command closes the contact as well, so we don't
		// need to do so.
		iDatabase->CommitContactL(*contact);

		CleanupStack::Pop(3); // contact, firstNameBuf, lastNameBuf
		}
	else
		{
		CleanupStack::PopAndDestroy(3); // contact, firstNameBuf, lastNameBuf
		}
	}

// End of file