/*

* Copyright (c) 2004 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:  This is the implementation of application class

 *

*/

#include <e32std.h>

#include <e32svr.h>

#include "finder.h"

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

#ifndef DBG

#ifdef _DEBUG

#define DBG(a) a

#else

#define DBG(a)

#endif

#endif

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

TKeyboardFinder::TKeyboardFinder() :

    iStandardKeys(0), iModifierKeys(0), iLeds(0), iAppCollection(0)

    {

    // Nothing else to do

    }

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

TBool TKeyboardFinder::BeginCollection(const CCollection* aCollection)

    {

    TBool examineCollection = ETrue;

    if ((aCollection->IsApplication()) && (iAppCollection == 0))

        {

        // Top-level application collection.

        if ((aCollection->UsagePage() == EUsagePageGenericDesktop)

                && (aCollection->Usage() == EGenericDesktopUsageKeyboard))

            {

            DBG(RDebug::Print(_L("[HID]\tTKeyboardFinder::BeginCollection: this is keyboard collection ")));

            // Collection is a keyboard device:

            iAppCollection = aCollection;

            iStandardKeys = iModifierKeys = iLeds = 0;

            }

        else

            {

            // (dont) Skip other types of top-level application collection:

            DBG(RDebug::Print(_L("[HID]\tTKeyboardFinder::BeginCollection: not keyboard collection ")));

            examineCollection = EFalse;

            }

        }

    return examineCollection;

    }

TBool TKeyboardFinder::EndCollection(const CCollection* aCollection)

    {

    TBool continueSearch = ETrue;

    if (aCollection == iAppCollection)

        {

        // Top-level application(Generic Desktop:Keyboard) finished:

        //

        iAppCollection = 0;

        // Stop if we've found a keyboard we can use in this

        // application collection:

        //

        continueSearch = !Found();

        }

    return continueSearch;

    }

void TKeyboardFinder::Field(const CField* aField)

    {

    if (iAppCollection)

        {

        if (IsStandardKeys(aField))

            {

            iStandardKeys = aField;

            }

        if (IsModifiers(aField))

            {

            iModifierKeys = aField;

            }

        if (IsLeds(aField))

            {

            iLeds = aField;

            }

        }

    }

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

TBool TKeyboardFinder::IsModifiers(const CField* aField) const

    {

    TBool found = EFalse;

    if (aField->IsInput() && aField->IsData() && (aField->UsagePage()

            == EUsagePageKeyboard))

        {

        const TInt KKbdLeftControl = 224;

        const TInt KKbdRightGUI = 231;

        // Test for a field containing only modifier keys

        if ((aField->UsageMin() >= KKbdLeftControl) && (aField->UsageMax()

                <= KKbdRightGUI))

            {

            DBG(RDebug::Print(_L("[HID]\t   Modifier field found")));

            found = ETrue;

            }

        }

    return found;

    }

TBool TKeyboardFinder::IsStandardKeys(const CField* aField) const

    {

    TBool found = EFalse;

    if (aField->IsInput() && aField->IsData() && (aField->UsagePage()

            == EUsagePageKeyboard))

        {

        const TInt KKeyboardRollOver = 0x01;

        const TInt KKeyboardUpArrow = 0x52;

        if ((aField->UsageMin() <= KKeyboardRollOver) && (aField->UsageMax()

                >= KKeyboardUpArrow))

            {

            DBG(RDebug::Print(_L("[HID]\t   Standard keys field found")));

            found = ETrue;

            }

        }

    return found;

    }

TBool TKeyboardFinder::IsLeds(const CField* aField) const

    {

    TBool found = EFalse;

    if (aField->IsOutput() && aField->IsData() && (aField->UsagePage()

            == EUsagePageLEDs))

        {

        const TInt KNumLockLed = 1;

        const TInt KCapsLockLed = 2;

        // Test for a field containing at least num lock or caps lock

        if ((aField->UsageMin() <= KCapsLockLed) && (aField->UsageMax()

                >= KNumLockLed))

            {

            DBG(RDebug::Print(_L("[HID]\t   LED field found")));

            found = ETrue;

            }

        }

    return found;

    }

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

TConsumerKeysFinder::TConsumerKeysFinder() :

    iField(0)

    {

    // Nothing else to do

    }

void TConsumerKeysFinder::Field(const CField* aField)

    {

    if (!Found() && aField->IsInput() && aField->IsData()

            && (aField->UsagePage() == EUsagePageConsumer))

        {

        DBG(RDebug::Print(_L("Consumer keys field found\r\n")));

        iField = aField;

        }

    }

TBool TConsumerKeysFinder::BeginCollection(const CCollection* aCollection)

    {

    const TInt KConsumerControl = 0x01;

    // Only look at top-level application (consumer devices: consumer

    // control) collections:

    //

    return aCollection->IsApplication() && (aCollection->UsagePage()

            == EUsagePageConsumer) && (aCollection->Usage()

            == KConsumerControl);

    }

TBool TConsumerKeysFinder::EndCollection(const CCollection* /*aCollection*/)

    {

    return !Found();

    }

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

TPowerKeysFinder::TPowerKeysFinder() :

    iField(0)

    {

    // Nothing else to do

    }

void TPowerKeysFinder::Field(const CField* aField)

    {

    if (!Found() && aField->IsInput() && aField->IsData()

            && (aField->UsagePage() == EUsagePageGenericDesktop))

        {

        // See if the range includes one or more of the power down,

        // sleep or wakeup controls:

        const TInt KPowerDown = 0x81;

        const TInt KWakeUp = 0x83;

        if ((aField->UsageMin() <= KWakeUp) && (aField->UsageMax()

                >= KPowerDown))

            {

            DBG(RDebug::Print(_L("[HID]\t  Power keys field found\r\n")));

            iField = aField;

            }

        }

    }

TBool TPowerKeysFinder::BeginCollection(const CCollection* aCollection)

    {

    const TInt KSystemControl = 0x80;

    // Only look at top-level application (generic desktop: system

    // control) collections:

    //

    return aCollection->IsApplication() && (aCollection->UsagePage()

            == EUsagePageGenericDesktop) && (aCollection->Usage()

            == KSystemControl);

    }

TBool TPowerKeysFinder::EndCollection(const CCollection*)

    {

    return !Found();

    }