1 /*

     2 * Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 #include "TAGMA.H"

    20 #include "TmTextDrawExt.h"

    21 

    22 #ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

    23 #include "TAGMA_INTERNAL.H"

    24 #endif

    25 

    26 /**

    27  * MTmSource decorator that can draw text in the appropriate highlight colors.

    28  * The text must already be on the screen before this is drawn over it.

    29  * @since 7.0

    30  * @internalComponent

    31  */

    32 NONSHARABLE_CLASS(TTmHighlightSource) : public MTmSource

    33 	{

    34 public:

    35 	TTmHighlightSource(MTmSource& aDelegate);

    36 	/** returns EFalse if the selection foreground and background colors are the same */

    37 	inline TBool HighlightVisible() {return 0xFFFFFF & (iForeground.Value() ^ iBackground.Value());}

    38 	void DrawBackground(CGraphicsContext& aGc,

    39 		const TPoint& aTextLayoutTopLeft, const TRect& aRect,

    40 		const TLogicalRgb& aBackground, TRect& aRectDrawn) const;

    41 	void DrawLineGraphics(CGraphicsContext& aGc,

    42 		const TPoint& aTextLayoutTopLeft, const TRect& aRect,

    43 		const TTmLineInfo& aLineInfo) const;

    44 	void DrawText(CGraphicsContext& aGc,

    45 		const TPoint& aTextLayoutTopLeft, const TRect& aRect,

    46 		const TTmLineInfo& aLineInfo, const TTmCharFormat& aFormat,

    47 		const TDesC& aText, const TInt aStart, const TInt aEnd, const TPoint& aTextOrigin, TInt aExtraPixels) const;

    48 	void DrawPicture(CGraphicsContext& aGc,

    49 		const TPoint& aTopLeft, const TRect& aRect,

    50 		MGraphicsDeviceMap& aDevice, const CPicture& aPicture) const;

    51 	// MTmSource functions: just pass through

    52 	MGraphicsDeviceMap& FormatDevice() const;

    53 	MGraphicsDeviceMap& InterpretDevice() const;

    54 	TInt DocumentLength() const;

    55 	void GetText(TInt aPos,TPtrC& aText,TTmCharFormat& aFormat) const;

    56 	void GetParagraphFormatL(TInt aPos,RTmParFormat& aFormat) const;

    57 	TInt ParagraphStart(TInt aPos) const;

    58 	CPicture* PictureL(TInt aPos) const;

    59 	TInt GetPictureSizeInTwipsL(TInt aPos,TSize& aSize) const;

    60 	TBool PageBreakInRange(TInt aStartPos,TInt aEndPos) const;

    61 	TAny* GetExtendedInterface(const TUid& aInterfaceId);

    62 

    63 private:

    64 	/**

    65 	 * Colour to draw the text in

    66 	 * @internalComponent

    67 	 */

    68 	TRgb iForeground;

    69 	/**

    70 	 * Colour to draw the background in

    71 	 * @internalComponent

    72 	 */

    73 	TRgb iBackground;

    74 	/**

    75 	 * Colour to blend the pictures with

    76 	 * @internalComponent

    77 	 */

    78 	TRgb iXorPictures;

    79 	MTmSource& iDelegate;

    80 	MTmTextDrawExt* iTmTextDrawExt;//The implementation of MTmTextDrawExt interface will be

    81 								   //used and it will replace all CGraphicsContext::Draw<Item> calls.

    82 	TTmTextDrawExt	iTmTextDrawExtDefault;//The default implementation of MTmTextDrawExt

    83 	};

    84