author | Simon Howkins <simonh@symbian.org> |
Mon, 29 Nov 2010 11:47:03 +0000 | |
branch | RCL_3 |
changeset 78 | dbcb928abe9c |
parent 0 | 4e91876724a2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: This class caches resource strings |
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* |
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*/ |
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#ifndef _GLXSTRINGCACHE_H_ |
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#define _GLXSTRINGCACHE_H_ |
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// INCLUDES |
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#include <e32cmn.h> |
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#include <e32std.h> |
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#include <e32base.h> |
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|
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// CLASS DECLARATION |
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|
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/** |
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* CGlxStringCache class |
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* |
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* This class caches resource strings. |
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* It maintains a mapping between the resource id and the string |
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* @author Rowland Cook |
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*/ |
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NONSHARABLE_CLASS(CGlxStringCache) : public CBase |
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{ |
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public: |
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/** |
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* Two-phase constructor |
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*/ |
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static IMPORT_C CGlxStringCache* NewL(); |
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|
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/** |
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* destructor |
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*/ |
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~CGlxStringCache(); |
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/** |
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* Loads a string from a resurce file |
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* |
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* @param aResourceFile - name of the resource file (does not contain the path). |
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* @param aResourceId - Id of the string to be loaded |
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* @return HBufC* containing the required string. |
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*/ |
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IMPORT_C HBufC* LoadLocalizedStringLC(const TDesC& aResourceFile, const TInt aResourceId); |
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private: |
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/** |
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* CGlxStringItem class |
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* |
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* This class encapsulates a resource id and it's associated string. |
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*/ |
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NONSHARABLE_CLASS(CGlxStringItem) : public CBase |
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{ |
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public: |
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/** |
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* NewL |
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* @param the resource id |
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* @param the string |
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* use this constructor prior to calling InsertL() (Above). |
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*/ |
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static CGlxStringItem* NewL(TInt aId, HBufC* aString); |
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/** |
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* Constructor |
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* @param the resource id |
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* use this constructor directly to create a dummy class typically used before calling Find() (Above). |
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*/ |
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CGlxStringItem(TInt aId); |
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/** |
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* destructor |
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*/ |
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~CGlxStringItem(); |
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/** |
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* GetId |
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* @return the Id |
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*/ |
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TInt GetId() const; |
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/** |
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* GetString |
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* @return HBufC* to the string |
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*/ |
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HBufC* GetString(); |
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private: |
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/** |
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* 2nd Phase constructor |
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* @param the string. Creates own copy of string |
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*/ |
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void ConstructL(HBufC* aString); |
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private: |
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/// The resource id of the string |
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TInt iId; |
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/// HBufC containing the string (Owned) |
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HBufC* iString; |
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}; |
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private: |
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/** |
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* Default Constructor |
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*/ |
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CGlxStringCache(); |
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/** |
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* Searches for a string given the resource id |
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* @param - resource id |
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* @return - an HBufC* to the string. NULL if not found. Ownership of string passed to caller. |
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*/ |
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HBufC* FindL(TInt aId); |
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/** |
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* Inserts a string and resource id into the cache |
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* @param - resource id |
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* @return - an HBufC* to the string. NULL if not found. Ownership of string passed to caller. |
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*/ |
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void InsertL(TInt aId, HBufC* aString); |
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/** |
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* Count |
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* @return number of elements in array |
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*/ |
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TInt Count(); |
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/** |
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* This method is a callback passed to RPointerArray.InsertInOrder |
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* @ref see TLinearOrder. |
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* @param first item to be compared |
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* @param second item to be compared |
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* @return a negative value is Item1 is less than Item2. Zero if Equal, otherwise a positive value |
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*/ |
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static TInt OrderById(const CGlxStringCache::CGlxStringItem& aItem1, const CGlxStringCache::CGlxStringItem& aItem2); |
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/** |
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* This method is a callback passed to RPointerArray.Find |
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* @ref see TIdentityRelation. |
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* @param first item to be compared |
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* @param second item to be compared |
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* @return ETrue id Item1 matches Item2, otherwise EFalse |
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*/ |
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static TBool MatchById(const CGlxStringCache::CGlxStringItem& aItem1, const CGlxStringCache::CGlxStringItem& aItem2); |
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/** |
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* Loads a string from a resurce file |
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* |
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* @param aResourceFile - name of the resource file (does not contain the path). |
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* @param aResourceId - Id of the string to be loaded |
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* @return HBufC* containing the required string. |
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*/ |
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HBufC* LoadLocalizedStringFromDriveL(const TDesC& aResourceFile, const TInt aResourceId); |
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private: |
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/// Array of CGlxStringItems |
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RPointerArray<CGlxStringItem> iStringCache; |
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// remembers the valid resource file name |
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TFileName iResourceFileName; |
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}; |
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#endif |