www.pudn.com > wcore.rar > WebCoreTextRenderer.h

/* 
 * Copyright (C) 2003 Apple Computer, Inc.  All rights reserved. 
 * Portions Copyright (c) 2005 Nokia Corporation, Inc. All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */ 
 
#ifndef __WebCoreTextRenderer_h__ 
#define __WebCoreTextRenderer_h__ 
 
// INCLUDES 
#include  
 
// CONSTANTS 
 
// MACROS 
 
// DATA TYPES 
 
// FUNCTION PROTOTYPES 
 
// FORWARD DECLARATIONS 
class TPoint; 
class CWebCoreGraphicsContext; 
class CFont; 
 
// CLASS DECLARATION 
 
 
/** 
* 
*  @lib webcore.lib 
*  @since 3.0 
*/ 
class TWebCoreTextStyle 
	{ 
public: 
 
    TWebCoreTextStyle() : 
        iLetterSpacing(0),iWordSpacing(0),iPadding(0),iFamilies(0), 
        iSmallCaps(EFalse),iRtl(EFalse),iVisuallyOrdered(EFalse), 
        iApplyRunRounding(EFalse),iApplyWordRounding(EFalse),iAttemptFontSubstitution(EFalse) 
		{ 
		} 
 
public: 
    TRgb iTextColor; 
    TRgb iBackgroundColor; 
    TInt iLetterSpacing; 
    TInt iWordSpacing; 
    TInt iPadding; 
    TInt iTabWidth; 
    TInt iXpos; 
 
    // this is an array of TPtrC's terminated by KNullDesC 
    TPtrC *iFamilies; 
    TBool iSmallCaps; 
    TBool iRtl; 
    TBool iVisuallyOrdered; 
    TBool iApplyRunRounding; 
    TBool iApplyWordRounding; 
    TBool iAttemptFontSubstitution; 
}; 
 
/** 
* 
*  @lib webcore.lib 
*  @since 3.0 
*/ 
class TWebCoreTextRun 
	{ 
	public: 
		TWebCoreTextRun(const TText *aCharacters, TUint aLength, TInt aFrom, TInt aTo) 
		{ 
			iCharacters = aCharacters; 
			iLength = aLength; 
			iFrom = aFrom; 
			iTo = aTo; 
		} 
 
	public: 
	    const TText *iCharacters; 
	    TUint iLength; 
	    TInt iFrom; 
	    TInt iTo; 
	}; 
 
/** 
* 
*  @lib webcore.lib 
*  @since 3.0 
*/ 
class TWebCoreTextGeometry 
	{ 
	public: 
	TWebCoreTextGeometry() 
	{ 
	    iPoint = TPoint(0,0); 
	    iSelectionY = 0; 
	    iSelectionHeight = 0; 
	    iSelectionMinX = 0; 
	    iSelectionMaxX = 0; 
		iUseFontMetricsForSelectionYAndHeight = 1; 
	} 
 
	public: 
	    TPoint iPoint; 
	    TReal iSelectionY; 
	    TReal iSelectionHeight; 
	    TReal iSelectionMinX; 
	    TReal iSelectionMaxX; 
	    TBool iUseFontMetricsForSelectionYAndHeight; 
	}; 
 
/** 
* 
*  @lib webcore.lib 
*  @since 3.0 
*/ 
class MWebCoreTextRenderer 
	{ 
	public: 
	// vertical metrics 
	virtual TInt Ascent() = 0; 
	virtual TInt Descent() = 0; 
	virtual TInt LineSpacing() = 0; 
	virtual TInt XHeight() = 0; 
 
	// horizontal metrics 
	virtual TInt WidthForRun(const TWebCoreTextRun& aRun, 
                                   const TWebCoreTextStyle& aStyle) = 0; 
 
	// drawing 
	virtual void DrawRun( CWebCoreGraphicsContext& aGc, const TWebCoreTextRun& aRun, 
						 const TWebCoreTextStyle& aStyle, 
						 const TWebCoreTextGeometry& aGeometry) = 0; 
 
    virtual void DrawHighlightForRun( CWebCoreGraphicsContext& aGc, const TWebCoreTextRun& aRun, 
                                     const TWebCoreTextStyle& aStyle, 
									 const TWebCoreTextGeometry& aGeometry) = 0; 
 
    virtual void DrawLineForCharacters( CWebCoreGraphicsContext& aGc, TPoint &aPoint, TInt aYOffset, 
									   TInt aWidth, TRgb &aColor) = 0; 
 
	// selection point check 
	virtual TInt PointToOffset(const TWebCoreTextRun& aRun, 
	                          const TWebCoreTextStyle& aStyle, 
	                          TInt aPosition, 
	                          TBool aReversed, 
	                          TBool aIncludePartialGlyphs) = 0; 
    virtual void Ref() = 0; 
    virtual void Deref() = 0; 
    virtual CFont* Font() = 0; 
    virtual TBool IsFontFixedPitch() = 0; 
	}; 
 
#endif 
 
// End of File