Package com.itextpdf.text.pdf.parser
Class PdfContentStreamProcessor
- java.lang.Object
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- com.itextpdf.text.pdf.parser.PdfContentStreamProcessor
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public class PdfContentStreamProcessor extends Object
Processor for a PDF content Stream.- Since:
- 2.1.4
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Field Summary
Fields Modifier and Type Field Description static String
DEFAULTOPERATOR
Default operator
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Constructor Summary
Constructors Constructor Description PdfContentStreamProcessor(RenderListener renderListener)
Creates a new PDF Content Stream Processor that will send it's output to the designated render listener.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Collection<String>
getRegisteredOperatorStrings()
RenderListener
getRenderListener()
Accessor method for the RenderListener object maintained in this class.GraphicsState
gs()
Returns the current graphics state.protected void
handleInlineImage(InlineImageInfo info, PdfDictionary colorSpaceDic)
Callback when an inline image is found.void
processContent(byte[] contentBytes, PdfDictionary resources)
Processes PDF syntax.ContentOperator
registerContentOperator(String operatorString, ContentOperator operator)
Registers a content operator that will be called when the specified operator string is encountered during content processing.XObjectDoHandler
registerXObjectDoHandler(PdfName xobjectSubType, XObjectDoHandler handler)
Registers a Do handler that will be called when Do for the provided XObject subtype is encountered during content processing.void
reset()
Resets the graphics state stack, matrices and resources.
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Field Detail
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DEFAULTOPERATOR
public static final String DEFAULTOPERATOR
Default operator- Since:
- 5.0.1
- See Also:
- Constant Field Values
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Constructor Detail
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PdfContentStreamProcessor
public PdfContentStreamProcessor(RenderListener renderListener)
Creates a new PDF Content Stream Processor that will send it's output to the designated render listener.- Parameters:
renderListener
- theRenderListener
that will receive rendering notifications
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Method Detail
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registerXObjectDoHandler
public XObjectDoHandler registerXObjectDoHandler(PdfName xobjectSubType, XObjectDoHandler handler)
Registers a Do handler that will be called when Do for the provided XObject subtype is encountered during content processing.
If you register a handler, it is a very good idea to pass the call on to the existing registered handler (returned by this call), otherwise you may inadvertently change the internal behavior of the processor.- Parameters:
xobjectSubType
- the XObject subtype this handler will process, or PdfName.DEFAULT for a catch-all handlerhandler
- the handler that will receive notification when the Do operator for the specified subtype is encountered- Returns:
- the existing registered handler, if any
- Since:
- 5.0.1
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registerContentOperator
public ContentOperator registerContentOperator(String operatorString, ContentOperator operator)
Registers a content operator that will be called when the specified operator string is encountered during content processing.
If you register an operator, it is a very good idea to pass the call on to the existing registered operator (returned by this call), otherwise you may inadvertently change the internal behavior of the processor.- Parameters:
operatorString
- the operator id, or DEFAULTOPERATOR for a catch-all operatoroperator
- the operator that will receive notification when the operator is encountered- Returns:
- the existing registered operator, if any
- Since:
- 2.1.7
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getRegisteredOperatorStrings
public Collection<String> getRegisteredOperatorStrings()
- Returns:
Collection
containing all the registered operators strings- Since:
- 5.5.6
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reset
public void reset()
Resets the graphics state stack, matrices and resources.
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gs
public GraphicsState gs()
Returns the current graphics state.- Returns:
- the graphics state
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processContent
public void processContent(byte[] contentBytes, PdfDictionary resources)
Processes PDF syntax. Note: If you re-use a givenPdfContentStreamProcessor
, you must callreset()
- Parameters:
contentBytes
- the bytes of a content streamresources
- the resources that come with the content stream
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handleInlineImage
protected void handleInlineImage(InlineImageInfo info, PdfDictionary colorSpaceDic)
Callback when an inline image is found. This requires special handling because inline images don't follow the standard operator syntax- Parameters:
info
- the inline imagecolorSpaceDic
- the color space for the inline immage
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getRenderListener
public RenderListener getRenderListener()
Accessor method for the RenderListener object maintained in this class. Necessary for implementing custom ContentOperator implementations.- Returns:
- the renderListener
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