/*
* Copyright (c) 2006-2010 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:  The parser for the OOM configuration file.
*
*/


#ifndef OOMCONFIGPARSER_H_
#define OOMCONFIGPARSER_H_

#include <xml/contenthandler.h>

using namespace Xml;

class COomConfig;
class COomRunPluginConfig;

/**
 *  Parser for the Oom Monitor configuration file
 *
 *  @lib oommonitor.lib
 *  @since S60 v5.0
 */
NONSHARABLE_CLASS(COomConfigParser) : public CBase, public MContentHandler 
    {
public:
    COomConfigParser(COomConfig& aConfig, RFs& aFs);
    
    void ParseL();

    
    // From MContent handler
    virtual void OnStartDocumentL(const RDocumentParameters& aDocParam, TInt aErrorCode);
    virtual void OnEndDocumentL(TInt aErrorCode);
    virtual void OnStartElementL(const RTagInfo& aElement, const RAttributeArray& aAttributes, 
                                 TInt aErrorCode);
    virtual void OnEndElementL(const RTagInfo& aElement, TInt aErrorCode);
    virtual void OnContentL(const TDesC8& aBytes, TInt aErrorCode);
    virtual void OnStartPrefixMappingL(const RString& aPrefix, const RString& aUri, 
                                       TInt aErrorCode);
    virtual void OnEndPrefixMappingL(const RString& aPrefix, TInt aErrorCode);
    virtual void OnIgnorableWhiteSpaceL(const TDesC8& aBytes, TInt aErrorCode);
    virtual void OnSkippedEntityL(const RString& aName, TInt aErrorCode);
    virtual void OnProcessingInstructionL(const TDesC8& aTarget, const TDesC8& aData, 
                                          TInt aErrorCode);
    virtual void OnError(TInt aErrorCode);
    virtual TAny* GetExtendedInterface(const TInt32 aUid);
    
    
    
private:
    
    void ConfigError(TInt aError);
    
    
    
    void StartElementL(const TDesC8& aLocalName, 
                          const RAttributeArray& aAttributes);
    
    void SetGlobalSettings(const RAttributeArray& aAttributes);
    void SetForceCheckConfigL(const RAttributeArray& aAttributes);
    void SetAppConfigL(const RAttributeArray& aAttributes);
    void SetCloseAppConfigL(const RAttributeArray& aAttributes);
    void SetAppCloseIdlePriorityConfigL(const RAttributeArray& aAttributes);
    void SetForegroundAppPriorityL(const RAttributeArray& aAttributes);
    
    void SetSystemPluginConfigL(const RAttributeArray& aAttributes);
    void SetAppPluginConfigL(const RAttributeArray& aAttributes);
    void SetPluginIdlePriorityL(const RAttributeArray& aAttributes);
    void SetPluginForegroundAppPriorityL(const RAttributeArray& aAttributes);
    
    TInt GetValueFromAttributeList(const RAttributeArray& aAttributes, const TDesC8& aName, TPtrC8& aValue);
    TInt GetValueFromHexAttributeList(const RAttributeArray& aAttributes, const TDesC8& aName, TUint& aValue);
    TInt GetValueFromDecimalAttributeList(const RAttributeArray& aAttributes, const TDesC8& aName, TUint& aValue);
    TInt GetValueFromDecimalAttributeList(const RAttributeArray& aAttributes, const TDesC8& aName, TInt& aValue);
    TInt GetValueFromBooleanAttributeList(const RAttributeArray& aAttributes, const TDesC8& aName, TBool& aValue);
    
    void SetPluginSyncMode(const RAttributeArray& aAttributes, COomRunPluginConfig& aRunPluginConfig);

    enum TOomParsingState
        {
        EOomParsingStateNone,
        EOomParsingStateRoot,
        EOomParsingStateGlobalSettings,
        EOomParsingStateAppSettings,
        EOomParsingStateAppCloseSettings,
        EOomParsingStateSystemPluginSettings,
        EOomParsingStateAppPluginSettings
        };    
    
    // Check that the current state is as expected
    // If not then the specified config error is generated
    void CheckState(TOomParsingState aExpectedState, TInt aError);
    
    // Check that the current state is as expected
    // If not then the specified config error is generated
    // This version checks to ensure that the current state matches either of the passed in states
    void CheckState(TOomParsingState aExpectedState1, TOomParsingState aExpectedState2, TInt aError);
    
    COomConfig& iConfig;
    
    RFs& iFs;
    
    void ChangeState(TOomParsingState aState);    
    
    TOomParsingState iState;
    
    TUint iParentUid;
    TUint iParentTargetApp;
    };

#endif /*OOMCONFIGPARSER_H_*/