webengine/wmlengine/src/css/include/CSSHandler.h
changeset 0 dd21522fd290
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/wmlengine/src/css/include/CSSHandler.h	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,147 @@
+/*
+* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "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:  Applies CSS for the box tree
+*
+*/
+
+
+
+#ifndef CCSSHANDLER_H
+#define CCSSHANDLER_H
+
+//  INCLUDES
+#include <e32base.h>
+#include "nw_css_processor.h"
+#include "nw_lmgr_boxvisitor.h"
+
+
+// CONSTANTS
+
+// MACROS
+
+// DATA TYPES
+
+// FUNCTION PROTOTYPES
+
+// FORWARD DECLARATIONS
+
+// CLASS DECLARATION
+
+/**
+*  This class applies the CSS styles to the box tree. 
+*  It breaks each box ApplyStyle into separate RunL
+*
+*  @lib css.lib
+*  @since 2.1
+*/
+class CCSSHandler : public CActive
+  {
+   public:  // Constructors and destructor
+        
+     /**
+      * Two-phased constructor.
+      * @param aProcessor A pointer to processor object that owns this object
+      * @return CCSSHandler*
+	    */
+      static CCSSHandler* NewL(NW_CSS_Processor_t* aProcessor);
+
+      /**
+      * Destructor.
+      */
+      virtual ~CCSSHandler();
+
+        
+    public: // New functions
+      
+      /**
+      * This is called from the processor when a new stylesheet needs to be applied
+      * @since 2.1
+      * @return void
+      */
+      void ApplyStylesL();
+
+    public: // Functions from base classes
+
+      /**
+      * From CActive 
+      * @since 2.1
+      * @param 
+      * @return void
+      */
+      void RunL();
+       
+    private:
+
+       /**
+      * From CActive Noop. 
+      * @since 2.1
+      * @param 
+      * @return void
+      */
+      void DoCancel();
+
+     /**
+      * C++ default constructor.
+      * @param aProcessor A pointer to processor object that owns this object
+      * @return CCSSHandler*
+      */
+      CCSSHandler(NW_CSS_Processor_t* aProcessor);
+
+      /**
+      * By default Symbian 2nd phase constructor is private.
+      */
+      void ConstructL();
+
+      /**
+      * This method applies styles to each box in the box tree and stores it as backup.
+      * It is called from the RunL method.
+      * @since 2.1
+      * @return ETrue if styles have been applied to all the boxes, otherwise EFalse
+      */
+      TBool ApplyBoxStylesL();
+
+      /**
+      * After the styles have been applied, this method replace the property list of all boxes 
+      * with the box backup property list, reformats the box tree and redraws it. Called from RunL
+      * @since 2.1
+      * @return void
+      */
+      void ApplyStylesCompleteL();
+
+      /**
+      * This method swaps the property list of all boxes with the box backup property list
+      * @since 2.1
+      * @return void
+      */
+      void SwapPropListL();
+
+      /**
+      * Gets the next box (using box visitor) which has the element node set up
+      * @since 2.1
+      * @param (OUT) element node which has been set on the box
+      * @return pointer to the next box
+      */
+      NW_LMgr_Box_t* GetNextBox(NW_DOM_ElementNode_t** node);
+
+    private:    // Data
+
+      // box visitor to visit each box of the box tree to which styles are applied
+      NW_LMgr_BoxVisitor_t iBoxVisitor;
+      // processor whose styles need to be applied
+      NW_CSS_Processor_t* iProcessor;
+    };
+
+#endif      // CCSSHandler
+            
+// End of CSS