Package com.itextpdf.text.pdf.pdfcleanup

Class PdfCleanUpContentOperator

java.lang.Object

com.itextpdf.text.pdf.pdfcleanup.PdfCleanUpContentOperator

All Implemented Interfaces:

ContentOperator

class PdfCleanUpContentOperator
extends Object
implements ContentOperator

Field Summary

Fields

Modifier and Type	Field	Description
private static final byte[]	c
protected PdfCleanUpRenderListener	cleanUpStrategy
private static final Set<String>	clippingPathOperators
private static final byte[]	cs
private static final byte[]	eoF
private static final Set<String>	eoFillOperators
private static final byte[]	eoW
private static final byte[]	f
private static final byte[]	h
private static final byte[]	l
private static final Set<String>	lineStyleOperators
private static final byte[]	m
private static final byte[]	n
private static final Set<String>	nwFillOperators
protected ContentOperator	originalContentOperator
private static final Set<String>	pathConstructionOperators
private static final Set<String>	pathPaintingOperators
private static final byte[]	q
private static final byte[]	Q
private static final byte[]	S
private static final Set<String>	strokeColorOperators
private static final Set<String>	strokeOperators
private static final byte[]	Tc
private static final byte[]	TcTStar
private static final Set<String>	textShowingOperators
private static final byte[]	TJ
private static final byte[]	TStar
private static final byte[]	Tw
private static final byte[]	W

Constructor Summary

Constructors

Constructor	Description
PdfCleanUpContentOperator(PdfCleanUpRenderListener cleanUpStrategy)

Method Summary

Modifier and Type	Method	Description
private boolean	allChunksAreVisible(List<PdfCleanUpContentChunk> chunks)
private float	getUnscaledTextChunkWidth(PdfCleanUpContentChunk.Text chunk, float characterSpacing, float wordSpacing, float fontSize, float horizontalScaling)	We get into this method when the current chunk is not visible.
void	invoke(PdfContentStreamProcessor pdfContentStreamProcessor, PdfLiteral operator, ArrayList<PdfObject> operands)	Invokes a content operator.
private boolean	isSpace(PdfCleanUpContentChunk.Text chunk)
static void	populateOperators(PdfContentStreamProcessor contentProcessor, PdfCleanUpRenderListener pdfCleanUpRenderListener)
private Map<Integer,Float>	structureTJarray(PdfArray array)	Example.
private static void	toPdf(PdfObject object, PdfWriter writer, OutputStream os)	Overriding standard PdfObject.toPdf because we need sorted PdfDictionaries.
private void	updateImageStream(PRStream imageStream, byte[] newData)
private void	writeBezierCurve(BezierCurve curve, PdfContentByte canvas)
private void	writeLine(Line line, PdfContentByte canvas)
private void	writeMoveTo(Point2D destinationPoint, PdfContentByte canvas)
private void	writeOperands(PdfContentByte canvas, List<PdfObject> operands)
private void	writePath(Path path, byte[] pathPaintingOperator, PdfContentByte canvas)
private void	writePath(String operatorStr, PdfContentByte canvas, PdfName strokeColorSpace)
private void	writeStroke(PdfContentByte canvas, Path path, PdfName strokeColorSpace)
private void	writeTextChunks(Map<Integer,Float> structuredTJoperands, List<PdfCleanUpContentChunk> chunks, PdfContentByte canvas, float characterSpacing, float wordSpacing, float fontSize, float horizontalScaling)	Renders parts of text which are visible.

Methods inherited from class java.lang.Object

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

Field Details

TStar

private static final byte[] TStar

Tw

private static final byte[] Tw

TcTStar

private static final byte[] TcTStar

TJ

private static final byte[] TJ

Tc

private static final byte[] Tc

m

private static final byte[] m

l

private static final byte[] l

c

private static final byte[] c

h

private static final byte[] h

S

private static final byte[] S

f

private static final byte[] f

eoF

private static final byte[] eoF

n

private static final byte[] n

W

private static final byte[] W

eoW

private static final byte[] eoW

q

private static final byte[] q

Q

private static final byte[] Q

cs

private static final byte[] cs

textShowingOperators

private static final Set<String> textShowingOperators

pathConstructionOperators

private static final Set<String> pathConstructionOperators

strokeOperators

private static final Set<String> strokeOperators

nwFillOperators

private static final Set<String> nwFillOperators

eoFillOperators

private static final Set<String> eoFillOperators

pathPaintingOperators

private static final Set<String> pathPaintingOperators

clippingPathOperators

private static final Set<String> clippingPathOperators

lineStyleOperators

private static final Set<String> lineStyleOperators

strokeColorOperators

private static final Set<String> strokeColorOperators

cleanUpStrategy

protected PdfCleanUpRenderListener cleanUpStrategy

originalContentOperator

protected ContentOperator originalContentOperator

Constructor Details

PdfCleanUpContentOperator

public PdfCleanUpContentOperator(PdfCleanUpRenderListener cleanUpStrategy)

Method Details

populateOperators

public static void populateOperators(PdfContentStreamProcessor contentProcessor,
 PdfCleanUpRenderListener pdfCleanUpRenderListener)

invoke

public void invoke(PdfContentStreamProcessor pdfContentStreamProcessor,
 PdfLiteral operator,
 ArrayList<PdfObject> operands)
            throws Exception

Description copied from interface: ContentOperator

Invokes a content operator.

Specified by:

invoke in interface ContentOperator

Parameters:

pdfContentStreamProcessor - the processor that is dealing with the PDF content

operator - the literal PDF syntax of the operator

operands - the operands that come with the operator

Throws:

Exception - any exception can be thrown - it will be re-packaged into a runtime exception and re-thrown by the PdfContentStreamProcessor

writeOperands

private void writeOperands(PdfContentByte canvas,
 List<PdfObject> operands)
                    throws IOException

Throws:

IOException

allChunksAreVisible

private boolean allChunksAreVisible(List<PdfCleanUpContentChunk> chunks)

toPdf

private static void toPdf(PdfObject object,
 PdfWriter writer,
 OutputStream os)
                   throws IOException

Overriding standard PdfObject.toPdf because we need sorted PdfDictionaries.

Throws:

IOException

structureTJarray

private Map<Integer,Float> structureTJarray(PdfArray array)

Example. TJ = [(h) 3 4 (q) 7 (w) (e)] Result = {0:0, 1:7, 2:7, 3:0, 4:0}

Returns:

Map whose key is an ordinal number of the string in the TJ array and value is the position adjustment.

writeTextChunks

private void writeTextChunks(Map<Integer,Float> structuredTJoperands,
 List<PdfCleanUpContentChunk> chunks,
 PdfContentByte canvas,
 float characterSpacing,
 float wordSpacing,
 float fontSize,
 float horizontalScaling)
                      throws IOException

Renders parts of text which are visible.

Throws:

IOException

getUnscaledTextChunkWidth

private float getUnscaledTextChunkWidth(PdfCleanUpContentChunk.Text chunk,
 float characterSpacing,
 float wordSpacing,
 float fontSize,
 float horizontalScaling)

We get into this method when the current chunk is not visible. Here we are calculating a piece of the Tj coefficient for a previous visible chunk. For details see PDF spec., Text Space Details, formula for "tx" coefficient and TextRenderInfo class (getUnscaledBaseline)

isSpace

private boolean isSpace(PdfCleanUpContentChunk.Text chunk)

updateImageStream

private void updateImageStream(PRStream imageStream,
 byte[] newData)
                        throws BadElementException,
IOException,
BadPdfFormatException

Throws:

BadElementException

IOException

BadPdfFormatException

writePath

private void writePath(String operatorStr,
 PdfContentByte canvas,
 PdfName strokeColorSpace)
                throws IOException

Throws:

IOException

writePath

private void writePath(Path path,
 byte[] pathPaintingOperator,
 PdfContentByte canvas)
                throws IOException

Throws:

IOException

writeMoveTo

private void writeMoveTo(Point2D destinationPoint,
 PdfContentByte canvas)
                  throws IOException

Throws:

IOException

writeBezierCurve

private void writeBezierCurve(BezierCurve curve,
 PdfContentByte canvas)
                       throws IOException

Throws:

IOException

writeLine

private void writeLine(Line line,
 PdfContentByte canvas)
                throws IOException

Throws:

IOException

writeStroke

private void writeStroke(PdfContentByte canvas,
 Path path,
 PdfName strokeColorSpace)
                  throws IOException

Throws:

IOException