Package org.openpdf.text.pdf.parser

Class PdfContentStreamHandler

java.lang.Object

org.openpdf.text.pdf.parser.PdfContentStreamHandler

public class PdfContentStreamHandler
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	PdfContentStreamHandler.BeginMarked	A content operator implementation (BMC).
private static class	PdfContentStreamHandler.BeginMarkedDict	A content operator implementation (BDC).
(package private) static class	PdfContentStreamHandler.BeginText	A content operator implementation (BT).
private class	PdfContentStreamHandler.Do
private static class	PdfContentStreamHandler.EndMarked	A content operator implementation (EMC).
(package private) static class	PdfContentStreamHandler.EndText	A content operator implementation (ET).
(package private) static class	PdfContentStreamHandler.ModifyCurrentTransformationMatrix	A content operator implementation (cm).
(package private) static class	PdfContentStreamHandler.MoveNextLineAndShowText	A content operator implementation (').
(package private) static class	PdfContentStreamHandler.MoveNextLineAndShowTextWithSpacing	A content operator implementation (").
(package private) static class	PdfContentStreamHandler.PopGraphicsState	A content operator implementation (Q).
(package private) static class	PdfContentStreamHandler.ProcessGraphicsStateResource	A content operator implementation (gs).
(package private) static class	PdfContentStreamHandler.PushGraphicsState	A content operator implementation (q).
(package private) static class	PdfContentStreamHandler.SetTextCharacterSpacing	A content operator implementation (Tc).
(package private) static class	PdfContentStreamHandler.SetTextFont	A content operator implementation (Tf).
(package private) static class	PdfContentStreamHandler.SetTextHorizontalScaling	A content operator implementation (Tz).
(package private) static class	PdfContentStreamHandler.SetTextLeading	A content operator implementation (TL).
(package private) static class	PdfContentStreamHandler.SetTextRenderMode	A content operator implementation (Tr).
(package private) static class	PdfContentStreamHandler.SetTextRise	A content operator implementation (Ts).
(package private) static class	PdfContentStreamHandler.SetTextWordSpacing	A content operator implementation (Tw).
(package private) static class	PdfContentStreamHandler.ShowText	A content operator implementation (Tj).
(package private) static class	PdfContentStreamHandler.ShowTextArray	A content operator implementation (TJ).
(package private) static class	PdfContentStreamHandler.TextMoveNextLine	A content operator implementation (T*).
(package private) static class	PdfContentStreamHandler.TextMoveStartNextLine	A content operator implementation (Td).
(package private) static class	PdfContentStreamHandler.TextMoveStartNextLineWithLeading	A content operator implementation (TD).
(package private) static class	PdfContentStreamHandler.TextSetTextMatrix	A content operator implementation (Tm).

Field Summary

Fields

Modifier and Type	Field	Description
private final Stack<String>	contextNames
private Stack<GraphicsState>	gsStack	Stack keeping track of the graphics state.
private Map<String,ContentOperator>	operators	A map with all supported operators operators (PDF syntax).
private final TextAssembler	renderListener	detail parser for text within a marked section.
private List<TextAssemblyBuffer>	textFragments
private final Stack<List<TextAssemblyBuffer>>	textFragmentStreams
private Matrix	textLineMatrix	Text line matrix.
private Matrix	textMatrix	Text matrix.

Constructor Summary

Constructors

Constructor	Description
PdfContentStreamHandler(TextAssembler renderListener)

Method Summary

Modifier and Type	Method	Description
(package private) void	applyTextAdjust(float tj)	Adjusts the text matrix for the specified adjustment value (see TJ operator in the PDF spec for information)
(package private) void	displayPdfString(PdfString string)	Displays text.
CMapAwareDocumentFont	getCurrentFont()
protected Matrix	getCurrentTextLineMatrix()	Returns the current line matrix.
protected Matrix	getCurrentTextMatrix()	Returns the current text matrix.
private static Matrix	getMatrix(List<PdfObject> operands)
String	getResultantText()
(package private) GraphicsState	graphicsState()	Returns the current graphics state.
protected void	installDefaultOperators()	Loads all the supported graphics and text state operators in a map.
void	invokeOperator(PdfLiteral operator, List<PdfObject> operands, PdfDictionary resources)	Invokes an operator.
Optional<ContentOperator>	lookupOperator(String operatorName)	Get the operator to process a command with a given name
(package private) void	popContext()
(package private) void	pushContext(String newContextName)
void	registerContentOperator(ContentOperator operator)	Registers a content operator that will be called when the specified operator string is encountered during content processing.
void	reset()

Methods inherited from class java.lang.Object

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

Field Details

textFragmentStreams

private final Stack<List<TextAssemblyBuffer>> textFragmentStreams

contextNames

private final Stack<String> contextNames

renderListener

private final TextAssembler renderListener

detail parser for text within a marked section. used by TextAssembler

operators

private Map<String,ContentOperator> operators

A map with all supported operators operators (PDF syntax).

gsStack

private Stack<GraphicsState> gsStack

Stack keeping track of the graphics state.

textMatrix

private Matrix textMatrix

Text matrix.

textLineMatrix

private Matrix textLineMatrix

Text line matrix.

textFragments

private List<TextAssemblyBuffer> textFragments

Constructor Details

PdfContentStreamHandler

public PdfContentStreamHandler(TextAssembler renderListener)

Method Details

getMatrix

private static Matrix getMatrix(List<PdfObject> operands)

registerContentOperator

public void registerContentOperator(ContentOperator operator)

Registers a content operator that will be called when the specified operator string is encountered during content processing. Each operator may be registered only once (it is not legal to have multiple operators with the same operatorString)

Parameters:

operator - the operator that will receive notification when the operator is encountered

Since:

2.1.7

installDefaultOperators

protected void installDefaultOperators()

Loads all the supported graphics and text state operators in a map.

lookupOperator

public Optional<ContentOperator> lookupOperator(String operatorName)

Get the operator to process a command with a given name

Parameters:

operatorName - name of the operator that we might need to call

Returns:

the operator or null if none present

invokeOperator

public void invokeOperator(PdfLiteral operator,
 List<PdfObject> operands,
 PdfDictionary resources)

Invokes an operator.

Parameters:

operator - the PDF Syntax of the operator

operands - a list with operands

resources - Pdf Resources found in the file containing the stream.

popContext

void popContext()

pushContext

void pushContext(String newContextName)

graphicsState

GraphicsState graphicsState()

Returns the current graphics state.

Returns:

the graphics state

reset

public void reset()

getCurrentTextMatrix

protected Matrix getCurrentTextMatrix()

Returns the current text matrix.

Returns:

the text matrix

Since:

2.1.5

getCurrentTextLineMatrix

protected Matrix getCurrentTextLineMatrix()

Returns the current line matrix.

Returns:

the line matrix

Since:

2.1.5

applyTextAdjust

void applyTextAdjust(float tj)

Adjusts the text matrix for the specified adjustment value (see TJ operator in the PDF spec for information)

Parameters:

tj - the text adjustment

getCurrentFont

public CMapAwareDocumentFont getCurrentFont()

Returns:

current font in processing state

displayPdfString

void displayPdfString(PdfString string)

Displays text.

Parameters:

string - the text to display

getResultantText

public String getResultantText()

Returns:

result text