// btrace_textonscreen.cpp

// 

// Copyright (c) 2008 - 2010 Accenture. All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

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

// 

// Initial Contributors:

// Accenture - Initial contribution

//

#include <fshell/ltkutils.h>

#include "btrace_parser.h"

EXPORT_C CBtraceTextOnScreen* CBtraceTextOnScreen::NewL(CBtraceReader& aReader)

	{

	CBtraceTextOnScreen* self = new (ELeave) CBtraceTextOnScreen(aReader);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

CBtraceTextOnScreen::CBtraceTextOnScreen(CBtraceReader& aReader)

	: iReader(aReader)

	{

	}

EXPORT_C CBtraceTextOnScreen::~CBtraceTextOnScreen()

	{

	iReader.RemoveObserver(KAmTraceCategory, *this);

	iScreenNotifs.Close();

	}

void CBtraceTextOnScreen::ConstructL()

	{

	iReader.AddObserverL(KAmTraceCategory, *this);

	LtkUtils::W32CrackL(); // In case no-one's called it yet

	}

//

// CBtraceTextOnScreen::HandleBtraceFrameL

// process the btrace frame, stripping out the relevant text

//

void CBtraceTextOnScreen::HandleBtraceFrameL(const TBtraceFrame& aFrame)

	{

	if (aFrame.iCategory == KAmTraceCategory && aFrame.iSubCategory == EAmTraceSubCategoryScreenText)

		{

		// First 2 words have packed windowgroup id and coordinates of text - TODO

		TUint16 windowGroupId = *((const TUint16*)aFrame.iData.Mid(2).Ptr());

		TPtrC8 data = aFrame.iData.Mid(8);

		TPtrC text((const TUint16*)data.Ptr(), data.Length() / 2);

		SeenL(aFrame.iTickCount, text, windowGroupId);

		}

	}

//

// CBtraceTextOnScreen::Seen

// inform any observers that text has arrived on-screen, passing a reference to the text

// note the observer may ask for any or a specific pattern of text to be notified on

//

void CBtraceTextOnScreen::SeenL(const TBtraceTickCount& aTickCount, const TDesC& aData, TInt aWindowGroupId)

	{

	iReader.Log(_L("Screen text: '%S' (%d)\r\n"), &aData, aWindowGroupId);

	TInt ii = iScreenNotifs.Count();

	while (--ii >= 0)

		{

		TTextOnScreenNotif& nt = iScreenNotifs[ii];

		if (nt.iWindowGroupId && (nt.iWindowGroupId != aWindowGroupId))

			{

			continue;

			}

		switch (nt.iMatchMode)

			{

			case EWildNonSpanning:

				{

				if (aData.MatchF(nt.iTxtPtr) != KErrNotFound)

					{

					MBtraceTextOnScreenObserver* observer = nt.iObserver;

					if (nt.iPersistence == ENotificationOneShot)

						{

						iScreenNotifs.Remove(ii);

						}

					observer->HandleTextSeenL(aTickCount, aData, aWindowGroupId);

					}

				break;

				}

			case ESpanningNonWild:

				{

				const TInt length = aData.Length();

				for (TInt i = 0; i < length; ++i)

					{

					if (aData[i] == nt.iTxtPtr[nt.iMatchedChars])

						{

						++nt.iMatchedChars;

						}

					else

						{

						nt.iMatchedChars = 0;

						}

					if (nt.iMatchedChars == nt.iTxtPtr.Length())

						{

						MBtraceTextOnScreenObserver* observer = nt.iObserver;

						if (nt.iPersistence == ENotificationOneShot)

							{

							iScreenNotifs.Remove(ii);

							}

						observer->HandleTextSeenL(aTickCount, aData, aWindowGroupId);

						break;

						}

					}

				break;

				}

			default:

				ASSERT(EFalse);

			}

		}	

	}

//

// CBtraceTextOnScreen::NotifyTextOnScreenL

// called by the client to register an interest in any text drawn to screen (via wserv only)

//

EXPORT_C void CBtraceTextOnScreen::NotifyTextOnScreenL(const TDesC& aText, MBtraceTextOnScreenObserver& aObserver)

	{

	NotifyTextOnScreenL(aText, aObserver, ENotificationOneShot);

	}

EXPORT_C void CBtraceTextOnScreen::NotifyTextOnScreenL(const TDesC& aText, MBtraceTextOnScreenObserver& aObserver, TBtraceNotificationPersistence aPersistence)

	{

	TTextOnScreenNotif notify(aText, aObserver, aPersistence);

	iScreenNotifs.AppendL(notify);

	}

EXPORT_C void CBtraceTextOnScreen::NotifyTextOnScreenL(const TDesC& aText, TMatchMode aMatchMode, MBtraceTextOnScreenObserver& aObserver, TBtraceNotificationPersistence aPersistence)

	{

	TTextOnScreenNotif notify(aText, aMatchMode, aObserver, aPersistence);

	iScreenNotifs.AppendL(notify);

	}

EXPORT_C void CBtraceTextOnScreen::NotifyTextOnScreenL(const TDesC& aText, TInt aWindowGroupId, TMatchMode aMatchMode, MBtraceTextOnScreenObserver& aObserver)

	{

	NotifyTextOnScreenL(aText, aWindowGroupId, aMatchMode, aObserver, ENotificationOneShot);

	}

EXPORT_C void CBtraceTextOnScreen::NotifyTextOnScreenL(const TDesC& aText, TInt aWindowGroupId, TMatchMode aMatchMode, MBtraceTextOnScreenObserver& aObserver, TBtraceNotificationPersistence aPersistence)

	{

	TTextOnScreenNotif notify(aText, aWindowGroupId, aMatchMode, aObserver, aPersistence);

	iScreenNotifs.AppendL(notify);

	}

EXPORT_C void CBtraceTextOnScreen::CancelNotifyTextOnScreen(MBtraceTextOnScreenObserver& aObserver)

	{

	for (TInt i = iScreenNotifs.Count()-1; i>=0; i--)

		{

		if (iScreenNotifs[i].iObserver == &aObserver)

			{

			iScreenNotifs.Remove(i);

			}

		}

	}

//

// TTextOnScreenNotif

//

CBtraceTextOnScreen::TTextOnScreenNotif::TTextOnScreenNotif(const TDesC& aText, MBtraceTextOnScreenObserver& aObserver, TBtraceNotificationPersistence aPersistence)

	: iTxtPtr(aText), iWindowGroupId(0), iMatchedChars(0), iMatchMode(EWildNonSpanning), iObserver(&aObserver), iPersistence(aPersistence)

	{

	}

CBtraceTextOnScreen::TTextOnScreenNotif::TTextOnScreenNotif(const TDesC& aText, TMatchMode aMatchMode, MBtraceTextOnScreenObserver& aObserver, TBtraceNotificationPersistence aPersistence)

	: iTxtPtr(aText), iWindowGroupId(0), iMatchedChars(0), iMatchMode(aMatchMode), iObserver(&aObserver), iPersistence(aPersistence)

	{

	}

CBtraceTextOnScreen::TTextOnScreenNotif::TTextOnScreenNotif(const TDesC& aText, TInt aWindowGroupId, TMatchMode aMatchMode, MBtraceTextOnScreenObserver& aObserver, TBtraceNotificationPersistence aPersistence)

	: iTxtPtr(aText), iWindowGroupId(aWindowGroupId), iMatchedChars(0), iMatchMode(aMatchMode), iObserver(&aObserver), iPersistence(aPersistence)

	{

	}