Package com.itextpdf.text.pdf.pdfcleanup

Class PdfCleanUpRenderListener

java.lang.Object

com.itextpdf.text.pdf.pdfcleanup.PdfCleanUpRenderListener

All Implemented Interfaces:

ExtRenderListener, RenderListener

class PdfCleanUpRenderListener
extends java.lang.Object
implements ExtRenderListener

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.List<PdfCleanUpContentChunk>	chunks
private static java.awt.Color	CLEANED_AREA_FILL_COLOR
private boolean	clipPath
private int	clippingRule
private java.util.Stack<PdfCleanUpContext>	contextStack
private Path	currentFillPath
private Path	currentStrokePath
private PdfCleanUpRegionFilter	filter
private Path	newClippingPath
private PdfStamper	pdfStamper
private int	strNumber
private Path	unfilteredCurrentPath

Constructor Summary

Constructors

Constructor	Description
PdfCleanUpRenderListener(PdfStamper pdfStamper, PdfCleanUpRegionFilter filter)

Method Summary

Modifier and Type	Method	Description
void	beginTextBlock()	Called when a new text block is beginning (i.e.
private void	cleanImage(java.awt.image.BufferedImage image, java.util.List<Rectangle> areasToBeCleaned)
void	clearChunks()
void	clipPath(int rule)	Called when the current path should be set as a new clipping path.
private void	closeOutputStream(java.io.OutputStream os)
void	endTextBlock()	Called when a text block has ended (i.e.
private Path	filterCurrentPath(Matrix ctm, boolean stroke, int fillingRule, float lineWidth, int lineCapStyle, int lineJoinStyle, float miterLimit, LineDashPattern lineDashPattern)
java.util.List<PdfCleanUpContentChunk>	getChunks()
int	getClippingRule()
PdfCleanUpContext	getContext()
Path	getCurrentFillPath()
Path	getCurrentStrokePath()
private java.util.List<Rectangle>	getImageAreasToBeCleaned(ImageRenderInfo renderInfo)
private byte[]	getJPGBytes(java.awt.image.BufferedImage image)
Path	getNewClipPath()
boolean	isClipped()
void	modifyPath(PathConstructionRenderInfo renderInfo)	Called when the current path is being modified.
void	popContext()
private byte[]	processImage(byte[] imageBytes, java.util.List<Rectangle> areasToBeCleaned)
void	registerNewContext(PdfDictionary resources, PdfContentByte canvas)
void	renderImage(ImageRenderInfo renderInfo)	Called when image should be rendered
Path	renderPath(PathPaintingRenderInfo renderInfo)	Called when the current path should be rendered.
void	renderText(TextRenderInfo renderInfo)	Called when text should be rendered
void	setClipped(boolean clipPath)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CLEANED_AREA_FILL_COLOR

private static final java.awt.Color CLEANED_AREA_FILL_COLOR

pdfStamper

private PdfStamper pdfStamper

filter

private PdfCleanUpRegionFilter filter

chunks

private java.util.List<PdfCleanUpContentChunk> chunks

contextStack

private java.util.Stack<PdfCleanUpContext> contextStack

strNumber

private int strNumber

unfilteredCurrentPath

private Path unfilteredCurrentPath

currentStrokePath

private Path currentStrokePath

currentFillPath

private Path currentFillPath

newClippingPath

private Path newClippingPath

clipPath

private boolean clipPath

clippingRule

private int clippingRule

Constructor Detail

PdfCleanUpRenderListener

public PdfCleanUpRenderListener(PdfStamper pdfStamper,
                                PdfCleanUpRegionFilter filter)

Method Detail

renderText

public void renderText(TextRenderInfo renderInfo)

Description copied from interface: RenderListener

Called when text should be rendered

Specified by:

renderText in interface RenderListener

Parameters:

renderInfo - information specifying what to render

renderImage

public void renderImage(ImageRenderInfo renderInfo)

Description copied from interface: RenderListener

Called when image should be rendered

Specified by:

renderImage in interface RenderListener

Parameters:

renderInfo - information specifying what to render

beginTextBlock

public void beginTextBlock()

Description copied from interface: RenderListener

Called when a new text block is beginning (i.e. BT)

Specified by:

beginTextBlock in interface RenderListener

endTextBlock

public void endTextBlock()

Description copied from interface: RenderListener

Called when a text block has ended (i.e. ET)

Specified by:

endTextBlock in interface RenderListener

modifyPath

public void modifyPath(PathConstructionRenderInfo renderInfo)

Description copied from interface: ExtRenderListener

Called when the current path is being modified. E.g. new segment is being added, new subpath is being started etc.

Specified by:

modifyPath in interface ExtRenderListener

Parameters:

renderInfo - Contains information about the path segment being added to the current path.

renderPath

public Path renderPath(PathPaintingRenderInfo renderInfo)

Description copied from interface: ExtRenderListener

Called when the current path should be rendered.

Specified by:

renderPath in interface ExtRenderListener

Parameters:

renderInfo - Contains information about the current path which should be rendered.

Returns:

The path which can be used as a new clipping path.

clipPath

public void clipPath(int rule)

Description copied from interface: ExtRenderListener

Called when the current path should be set as a new clipping path.

Specified by:

clipPath in interface ExtRenderListener

Parameters:

rule - Either PathPaintingRenderInfo.EVEN_ODD_RULE or PathPaintingRenderInfo.NONZERO_WINDING_RULE

isClipped

public boolean isClipped()

setClipped

public void setClipped(boolean clipPath)

getClippingRule

public int getClippingRule()

getCurrentStrokePath

public Path getCurrentStrokePath()

getCurrentFillPath

public Path getCurrentFillPath()

getNewClipPath

public Path getNewClipPath()

getChunks

public java.util.List<PdfCleanUpContentChunk> getChunks()

getContext

public PdfCleanUpContext getContext()

registerNewContext

public void registerNewContext(PdfDictionary resources,
                               PdfContentByte canvas)

popContext

public void popContext()

clearChunks

public void clearChunks()

getImageAreasToBeCleaned

private java.util.List<Rectangle> getImageAreasToBeCleaned(ImageRenderInfo renderInfo)

Returns:

null if the image is not allowed (either it is fully covered or ctm == null). List of covered image areas otherwise.

processImage

private byte[] processImage(byte[] imageBytes,
                            java.util.List<Rectangle> areasToBeCleaned)

cleanImage

private void cleanImage(java.awt.image.BufferedImage image,
                        java.util.List<Rectangle> areasToBeCleaned)

getJPGBytes

private byte[] getJPGBytes(java.awt.image.BufferedImage image)

filterCurrentPath

private Path filterCurrentPath(Matrix ctm,
                               boolean stroke,
                               int fillingRule,
                               float lineWidth,
                               int lineCapStyle,
                               int lineJoinStyle,
                               float miterLimit,
                               LineDashPattern lineDashPattern)

Parameters:

fillingRule - If the path is contour, pass any value.

closeOutputStream

private void closeOutputStream(java.io.OutputStream os)