nsBidiPresUtils::BidiProcessor Class Reference

Interface for the processor used by ProcessText. More...

#include <nsBidiPresUtils.h>

List of all members.

Public Member Functions
virtual	~BidiProcessor ()
virtual void	SetText (const PRUnichar *aText, PRInt32 aLength, nsBidiDirection aDirection)=0
	Sets the current text with the given length and the given direction.
virtual nscoord	GetWidth ()=0
	Returns the measured width of the text given in SetText.
virtual void	DrawText (nscoord aXOffset, nscoord aWidth)=0
	Draws the text given in SetText to a rendering context.

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Detailed Description

Interface for the processor used by ProcessText.

Used by process text to collect information about the width of subruns and to notify where each subrun should be rendered.

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Constructor & Destructor Documentation

virtual nsBidiPresUtils::BidiProcessor::~BidiProcessor

(

)

[inline, virtual]

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Member Function Documentation

virtual void nsBidiPresUtils::BidiProcessor::DrawText	(	nscoord	aXOffset,
		nscoord	aWidth
	)			[pure virtual]

Draws the text given in SetText to a rendering context.

If SetText was not called with valid parameters, the result of this call is undefined. This call is guaranteed to only be called once between SetText calls.

Parameters:

	aXOffset	The offset of the left side of the substring to be drawn from the beginning of the overall string passed to ProcessText.
	aWidth	The width returned by GetWidth.

virtual nscoord nsBidiPresUtils::BidiProcessor::GetWidth

(

)

[pure virtual]

Returns the measured width of the text given in SetText.

If SetText was not called with valid parameters, the result of this call is undefined. This call is guaranteed to only be called once between SetText calls. Will be invoked before DrawText.

virtual void nsBidiPresUtils::BidiProcessor::SetText	(	const PRUnichar *	aText,
		PRInt32	aLength,
		nsBidiDirection	aDirection
	)			[pure virtual]

Sets the current text with the given length and the given direction.

Remarks:

The reason that the function gives a string instead of an index is that ProcessText copies and modifies the string passed to it, so passing an index would be impossible.

Parameters:

	aText	The string of text.
	aLength	The length of the string of text.
	aDirection	The direction of the text. The string will never have mixed direction.

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The documentation for this class was generated from the following file:

• nsBidiPresUtils.h