/*

 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "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:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:  File containing application list classes

 *

 */

//INCLUDES:

#include <mmf/common/mmfcontrollerpluginresolver.h> // for CleanupResetAndDestroyPushL

#include <apgwgnam.h>

#include <bitstd.h>

#include <AknIconUtils.h> // avkon

#include <apgicnfl.h> // fbsbitmap

#include <AknIconSrvClient.h> 

#include <fbs.h>

#include <apgwgnam.h>

#include <QSizeF>

#include <camenuiconutility.h>

#include "tsdatalist.h"

#include "tsentrykeygenerator.h"

#include "tsscreenshotmsg.h"

#include "tsunregscreenshotmsg.h"

#include "tsvisibilitymsg.h"

// size for the created app icons

const TInt KAppIconWidth = 128;

const TInt KAppIconHeight = 128;

//uids to be hidden

const TUid KHsApplicationUid = { 0x20022F35 };

// ================= MEMBER FUNCTIONS =======================

// --------------------------------------------------------------------------

/**

 * Two-phased constructor.

 */

CTsDataList* CTsDataList::NewL(MTsResourceManager& resources,

                                     MTsWindowGroupsMonitor &monitor, 

                                     MTsDataObserver& observer)

{

    CTsDataList* self = new (ELeave) CTsDataList(resources, monitor, observer);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

}

// --------------------------------------------------------------------------

/**

 * Constructor.

 */

CTsDataList::CTsDataList(MTsResourceManager& resources,

                         MTsWindowGroupsMonitor &monitor, 

                         MTsDataObserver& observer) 

:

    CTsWindowGroupsObserver(monitor),

    mResources(resources),

    mObserver(observer)

{

}

// --------------------------------------------------------------------------

/*

 * Destructor

 */

CTsDataList::~CTsDataList()

{

    mData.ResetAndDestroy();

    mVisibleData.Close();

    mHiddenUids.Close();

    RFbsSession::Disconnect();

    RAknIconSrvClient::Disconnect();

    delete mDefaultIcon;

}

// --------------------------------------------------------------------------

/**

 * Performs 2nd phase construction.

 */

void CTsDataList::ConstructL()

{

    BaseConstructL();

    mHiddenUids.AppendL(KHsApplicationUid);

    User::LeaveIfError(RFbsSession::Connect());

    RAknIconSrvClient::Connect();

    mDefaultIcon = HbIcon2CFbsBitmapL(HbIcon("qtg_large_application"));

}

// --------------------------------------------------------------------------

/**

 * Returns a reference to the current content.

 * Also performs sanity checks, e.g. associates application icons

 * when no screenshot has been received.

 * @return  ref to content array

 */

const RTsFswArray& CTsDataList::Data() const

{

    return mVisibleData;

}

// --------------------------------------------------------------------------

/**

 * Interface implementation

 * @see MTsWindowGroupsObserver HandleWindowGroupChanged

 */

void CTsDataList::HandleWindowGroupChanged(MTsResourceManager &, 

                                              const TArray<RWsSession::TWindowGroupChainInfo> &wgList)

{

    TRAP_IGNORE(RTsFswArray newAppsList;

                CleanupResetAndDestroyPushL(newAppsList);

                CollectAppsL(newAppsList, wgList);

                FitDataToList(newAppsList);

                CleanupStack::PopAndDestroy(&newAppsList);

                );

}

// --------------------------------------------------------------------------

/**

 * Adds running apps to the list.

 * @param   appsList    array to add to

 */

void CTsDataList::CollectAppsL(RTsFswArray& appsList, 

                               const TArray<RWsSession::TWindowGroupChainInfo> &wgList)

{

    for (TInt i = 0; i < wgList.Count(); ++i) {

        TTsEntryKey key;

        TInt err = TsEntryKeyGeneraror::Generate(key, wgList[i].iId, wgList);

        //skip this entry if it is already on list or generate key failed

        if (err!=KErrNone || FindEntry(appsList, key) >= 0) {

            continue;

        }

        // get window group name

        CApaWindowGroupName* windowName = CApaWindowGroupName::NewLC(mResources.WsSession(), key.WindowGroupId());

        TUid appUid = windowName->AppUid();

         // get screen number (-1=console, 0=main screen, 1=cover ui)

        TInt appScreen = 0;

        TInt scrNumErr = mResources.ApaSession().GetDefaultScreenNumber( appScreen, appUid );

        if (appUid.iUid && !windowName->Hidden() && (appScreen == 0 || appScreen == -1) && scrNumErr == KErrNone ) {

            AddEntryL(key, appUid, windowName, appsList);

        }

        CleanupStack::PopAndDestroy(windowName);

    }

}

// --------------------------------------------------------------------------

/**

 * Called from CollectTasksL for each entry in the task list.

 * @param   key       entry key

 * @param   appUid     application uid

 * @param   wgName     window group name or NULL

 * @param   newList    list to add to

 */

void CTsDataList::AddEntryL(const TTsEntryKey& key, const TUid& appUid,

    CApaWindowGroupName* wgName, RTsFswArray& newList)

{

    CTsEntry* entry = CTsEntry::NewLC(key, mObserver);

    // check if present in old list and if yes then take some of the old data

    TBool found = ConsiderOldDataL(key);

    // if not present previously then find out app name

    // and check if screenshot is already available

    if (!found) {

        entry->SetAppUid(appUid);       

        HBufC* name = FindAppNameLC(wgName, appUid, key.WindowGroupId());

        if (name) {

            entry->SetAppNameL(*name);

        }

        CleanupStack::PopAndDestroy(name);

        CFbsBitmap* iconBitmap = GetAppIconL(appUid);

        //transfer ownership to entry

        entry->SetAppIcon(iconBitmap);

    }

    if (wgName) {

        entry->SetCloseableApp(!wgName->IsSystem());

    }

    // add to new list, ownership is transferred

    newList.AppendL(entry);

    CleanupStack::Pop(entry);

}

// --------------------------------------------------------------------------

/**

 * Checks if there is an entry for same app in the content list.

 * If yes then it takes some of the data for the entry that

 * will correspond to the same app in the refreshed content list.

 * @param   key      new key in content list

 * @return  ETrue if app was found

 */

TBool CTsDataList::ConsiderOldDataL(const TTsEntryKey& key)

{

    for (TInt entryIdx = 0, oldCount = mData.Count(); entryIdx < oldCount; ++entryIdx) {

        if (mData[entryIdx]->Key() == key) {

            return ETrue;

        }

    }

    return EFalse;

}

// --------------------------------------------------------------------------

/**

 * Finds out the application name.

 * @param   windowName window group name or NULL

 * @param   appUId     application uid

 * @param   wgId       window group id

 * @return  application name, ownership transferred to caller

 */

HBufC* CTsDataList::FindAppNameLC(CApaWindowGroupName* windowName, const TUid& appUid, TInt wgId)

{

    //Retrieve the app name

    TApaAppInfo info;

    mResources.ApaSession().GetAppInfo(info, appUid);

    TPtrC caption = info.iShortCaption;

    HBufC* tempName = 0;

    if (!caption.Length() && windowName) // if not set - use thread name instead

    {

        if (windowName->Caption().Length()) {

            tempName = windowName->Caption().AllocL();

            //put on cleanupstack after the if

        }

        else {

            TThreadId threadId;

            TInt err = mResources.WsSession().GetWindowGroupClientThreadId(wgId, threadId);

            if (err == KErrNone) {

                RThread thread;

                CleanupClosePushL(thread);

                err = thread.Open(threadId);

                if (err == KErrNone) {

                    tempName = thread.Name().AllocL(); // codescanner::forgottoputptroncleanupstack

                    // tempName put on cleanupstack after the if

                }

                CleanupStack::PopAndDestroy(&thread);

            }

        }

    }

    else {

        tempName = caption.AllocL();

        //put on cleanupstack after the if

    }

    CleanupStack::PushL(tempName);

    return tempName;

}

// --------------------------------------------------------------------------

/**

 * Fit existing class contained data list into give one.

 * Data is being changed with application type consideration that is based 

 * on aConsiderWidgets param. 

 * Function removes or add entries into data depend on given list.

 * @param   listToFit          list with actual data  

 */

void CTsDataList::FitDataToList(RTsFswArray& listToFit)

{

    TBool changed = EFalse;

    TInt listCount = listToFit.Count();

    TInt dataCount = mData.Count();

    //remove items that dont't exists in newly collected list      

    for (TInt i = dataCount - 1; i >= 0; --i) {

        if (!CheckIfExists(*mData[i], listToFit)) {

            delete mData[i];

            mData.Remove(i);

            changed = ETrue;

        }

    }

    RArray<TTsEntryKey> allKeys;

    //add new items at start

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

        allKeys.Insert(listToFit[i]->Key(), 0);

        if (!CheckIfExists(*listToFit[i], mData)) {

            HideEntryIfNotAllowed(listToFit[i]);            

            mData.Insert(listToFit[i], 0);

            TTime currentTimestamp;

            currentTimestamp.UniversalTime();

            mData[0]->SetTimestamp(currentTimestamp);

            listToFit[i] = 0;

            changed = ETrue;

        }

    }

    //establish order

    TBool orderChanged = EstablishOrder(allKeys);

    //update entries data

    TBool dataChanged = UpdateEntryData(listToFit);

    RebuildVisibleDataListL();

    if (changed || orderChanged || dataChanged) {

        mObserver.DataChanged();

    }

    allKeys.Close();

}

// --------------------------------------------------------------------------

/**

 * Checks if there is an entry for same app in the given list.

 * @param   entry      entry

 * @param   newList    ref to list

 * @return  ETrue if app was found

 */

TBool CTsDataList::CheckIfExists(const CTsEntry& entry, const RTsFswArray& list) const

{

    TBool exists(EFalse);

    TInt pos = FindEntry(list, entry.Key());

    if (pos >= 0) {

        exists = ETrue;

    }

    return exists;

}

// --------------------------------------------------------------------------

/**

 * Retrieves the bitmap for the icon of the given app.

 * @param   appUid application uid

 * @return  app CFbsBitmap

 */

CFbsBitmap* CTsDataList::GetAppIconL(const TUid& aAppUid)

{

	HbIcon icon = CaMenuIconUtility::getApplicationIcon(aAppUid.iUid, QSizeF(KAppIconWidth, KAppIconHeight));    

    CFbsBitmap* iconBitmap = HbIcon2CFbsBitmapL(icon);

    if (!iconBitmap) {

        iconBitmap = new(ELeave) CFbsBitmap;

        TInt err = KErrNotFound;

        if(mDefaultIcon) {

            err = iconBitmap->Duplicate(mDefaultIcon->Handle());

        }

        if (KErrNone!=err) {

            delete iconBitmap;

            iconBitmap = NULL;

        }

    }    

    return iconBitmap; 

    }

// --------------------------------------------------------------------------

/**

 * Converts HbIcon to CFbsBitmap

 * @param   icon icon to be coverted

 * @return  CFbsBitmap

 */

CFbsBitmap* CTsDataList::HbIcon2CFbsBitmapL(const HbIcon& icon)

{

    QIcon qicon = icon.qicon();

    QPixmap pixmap = qicon.pixmap(QSize(KAppIconWidth, KAppIconHeight));

    CFbsBitmap* retValue = NULL;

    if (!pixmap.isNull()) {

        retValue = pixmap.toSymbianCFbsBitmap();

    }

    return retValue; 

}

// --------------------------------------------------------------------------

TBool CTsDataList::isSupported(TInt function) const

{

    return (RegisterScreenshotMessage == function ||

            UnregisterScreenshotMessage == function ||

            VisibilityChange == function);

}

// --------------------------------------------------------------------------

void CTsDataList::handleDataL(TInt function,RReadStream& dataStream)

{

    switch(function){

    case RegisterScreenshotMessage:

        registerScreenshotL(dataStream);

        break;

    case UnregisterScreenshotMessage:

        unregisterScreenshotL(dataStream);

        break;

    case VisibilityChange:

        changeVisibilityL(dataStream);

        break;

    }

}

// --------------------------------------------------------------------------

void CTsDataList::registerScreenshotL(RReadStream& dataStream)

{

    CTsScreenshotMsg* msg = CTsScreenshotMsg::NewLC(dataStream);

    const TInt pos = FindEntry(mData, GenerateKeyL(msg->windowGroupId()));

    User::LeaveIfError(pos);

    mData[pos]->SetScreenshotL(msg->screenshot(), msg->priority());

    CleanupStack::PopAndDestroy(msg);

}

// --------------------------------------------------------------------------

void CTsDataList::unregisterScreenshotL(RReadStream& dataStream)

{

    CTsUnregisterScreenshotMsg* msg = CTsUnregisterScreenshotMsg::NewLC(dataStream);

    const TInt pos = FindEntry(mData, GenerateKeyL(msg->windowGroupId()));

    User::LeaveIfError(pos);

    mData[pos]->RemoveScreenshotL();

    CleanupStack::PopAndDestroy(msg);

}

// --------------------------------------------------------------------------

void CTsDataList::changeVisibilityL(RReadStream& dataStream)

{

    CTsVisibilitMsg* msg = CTsVisibilitMsg::NewLC(dataStream);

    const TInt pos = FindEntry(mData, GenerateKeyL(msg->windowGroupId()));

    User::LeaveIfError(pos);

    msg->visibility() == mData[pos]->GetVisibility() ? User::Leave(KErrInUse) : 

                                                       mData[pos]->SetVisibility(msg->visibility());

    CleanupStack::PopAndDestroy(msg);

    RebuildVisibleDataListL();

    mObserver.DataChanged();

}

// --------------------------------------------------------------------------

/**

 * Checks if given uid is on hidden list

 * @param   aUid uid to be checked

 * @return  ETrue if uid is on hidden list

 */

TBool CTsDataList::IsHiddenUid(TUid uid)

{

    return mHiddenUids.Find(uid) >= 0 ? ETrue : EFalse;

}

// --------------------------------------------------------------------------

/**

 * Finds entry in array

 * @param   list list to find

 * @param   key finding key

 * @return   position or KErrNotFound

 */

TInt CTsDataList::FindEntry(const RTsFswArray& list, const TTsEntryKey& key) const

{

    TInt pos(KErrNotFound);

    for (TInt entryIdx = 0; entryIdx < list.Count(); ++entryIdx) {

        if (list[entryIdx]->Key() == key) {

            pos = entryIdx;

            break;

        }

    }

    return pos;

}

// --------------------------------------------------------------------------

/**

 * Establish entry order accridung to aKeyList, all keys MUST be in iData

 * @param   keyList reference key list

 * @return   ETrue if changes occured

 */

TBool CTsDataList::EstablishOrder(const RArray<TTsEntryKey>& keyList)

{

    TBool changed(EFalse);

    TInt lastChangedItem(KErrNotFound);

    __ASSERT_ALWAYS(mData.Count() == keyList.Count(), User::Panic(_L("EstablishOrder 1"), KErrBadHandle) );

    for (TInt i = 0; i < keyList.Count(); i++) {

        const TTsEntryKey& currentdataKey = mData[i]->Key();

        const TTsEntryKey& referenceKey = keyList[i];

        if (!(currentdataKey == referenceKey)) {

            TInt foundPos = FindEntry(mData, referenceKey);

            __ASSERT_ALWAYS(foundPos>=0, User::Panic(_L("EstablishOrder 2"), KErrBadHandle) );

            CTsEntry* entry = mData[foundPos];

            mData.Remove(foundPos);

            mData.Insert(entry, i);

            changed = ETrue;

            lastChangedItem = i;

        }

    }

    TTime currentTimestamp;

    currentTimestamp.UniversalTime();

    for (TInt i = lastChangedItem; i >= 0; --i) {

        mData[i]->SetTimestamp(currentTimestamp);            

    }

    return changed;

}

// --------------------------------------------------------------------------

/**

 * Updates entry data on mData according to list

 * @param   list reference entires list

 * @return   ETrue if changes occured

 */

TBool CTsDataList::UpdateEntryData(const RTsFswArray& list)

{

    __ASSERT_ALWAYS(mData.Count() == list.Count(), User::Panic(_L("UpdateEntryData 1"), KErrBadHandle) );

    TBool changed(EFalse);

    for (TInt i=0; i<list.Count(); i++) {

        if(list[i]) {

            __ASSERT_ALWAYS(mData[i]->Key() == list[i]->Key(), User::Panic(_L("UpdateEntryData 12"), KErrBadHandle) );

            if(mData[i]->CloseableApp() != list[i]->CloseableApp()) {

                mData[i]->SetCloseableApp(list[i]->CloseableApp());

                changed = ETrue;

            }

        }

    }

    return changed;

}

// --------------------------------------------------------------------------

/**

 * Function generate task key using window group id

 * @param wgId - window group id of running application

 * @param entry key 

 */

TTsEntryKey CTsDataList::GenerateKeyL(TInt wgId)

{

   RArray<RWsSession::TWindowGroupChainInfo> allWgIds;

   CleanupClosePushL(allWgIds);

   User::LeaveIfError(mResources.WsSession().WindowGroupList(0, &allWgIds));

   TTsEntryKey key;

   User::LeaveIfError(TsEntryKeyGeneraror::Generate(key, wgId, allWgIds.Array()));