Package com.itextpdf.text.pdf.ocg

Class OCGRemover

java.lang.Object

com.itextpdf.text.pdf.ocg.OCGRemover

public class OCGRemover
extends Object

Class that knows how to remove OCG layers.

Constructor Summary

Constructors

Constructor	Description
OCGRemover()

Method Summary

Modifier and Type	Method	Description
private boolean	isToBeRemoved(PdfDictionary ocg, Set<String> names)	Checks if an OCG dictionary is on the list for removal.
private void	parse(OCGParser parser, PdfDictionary page)	Uses the OCGParser on a page
private void	removeAnnots(PdfDictionary page, Set<String> ocgs)	Removes annotations from a page dictionary
void	removeLayers(PdfReader reader, String... layers)	Removes layers from a PDF document
private void	removeOCGsFromArray(PdfArray array, Set<String> ocgs)	Searches an array for references to OCGs that need to be removed.
private void	removeOCGsFromArray(PdfDictionary dict, PdfName name, Set<String> ocgs)	Gets an array from a dictionary and checks if it contains references to OCGs that need to be removed
private void	removeProperties(PdfDictionary page, Set<String> ocgs)	Removes ocgs from a page resources

Methods inherited from class java.lang.Object

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

Constructor Details

OCGRemover

public OCGRemover()

Method Details

removeLayers

public void removeLayers(PdfReader reader,
 String... layers)
                  throws IOException

Removes layers from a PDF document

Parameters:

reader - a PdfReader containing a PDF document

layers - a sequence of names of OCG layers

Throws:

IOException

removeOCGsFromArray

private void removeOCGsFromArray(PdfDictionary dict,
 PdfName name,
 Set<String> ocgs)

Gets an array from a dictionary and checks if it contains references to OCGs that need to be removed

Parameters:

dict - the dictionary

name - the name of an array entry

ocgs - the removal list

removeOCGsFromArray

private void removeOCGsFromArray(PdfArray array,
 Set<String> ocgs)

Searches an array for references to OCGs that need to be removed.

Parameters:

array - the array

ocgs - the removal list

removeAnnots

private void removeAnnots(PdfDictionary page,
 Set<String> ocgs)

Removes annotations from a page dictionary

Parameters:

page - a page dictionary

ocgs - a set of names of OCG layers

removeProperties

private void removeProperties(PdfDictionary page,
 Set<String> ocgs)

Removes ocgs from a page resources

Parameters:

page - a page dictionary

ocgs - a set of names of OCG layers

isToBeRemoved

private boolean isToBeRemoved(PdfDictionary ocg,
 Set<String> names)

Checks if an OCG dictionary is on the list for removal.

Parameters:

ocg - a dictionary

names - the removal list

Returns:

true if the dictionary should be removed

parse

private void parse(OCGParser parser,
 PdfDictionary page)
            throws IOException

Uses the OCGParser on a page

Parameters:

parser - the OCGParser

page - the page dictionary of the page that needs to be parsed.

Throws:

IOException