Class ParentTreeHandler

java.lang.Object
com.itextpdf.kernel.pdf.tagging.ParentTreeHandler
class ParentTreeHandler extends Object
Internal helper class which is used to effectively build parent tree and also find marked content references: for specified page, by MCID or by struct parent index.

  • Field Details

  • Constructor Details

    • ParentTreeHandler

      ParentTreeHandler(PdfStructTreeRoot structTreeRoot)
      Init ParentTreeHandler. On init the parent tree is read and stored in this instance.

  • Method Details

    • getPageMarkedContentReferences

      public ParentTreeHandler.PageMcrsContainer getPageMarkedContentReferences(PdfPage page)
      Gets a list of all marked content references on the page.

    • findMcrByMcid

      public PdfMcr findMcrByMcid(PdfDictionary pageDict, int mcid)

    • findObjRefByStructParentIndex

      public PdfObjRef findObjRefByStructParentIndex(PdfDictionary pageDict, int structParentIndex)

    • getNextMcidForPage

      public int getNextMcidForPage(PdfPage page)

    • createParentTreeEntryForPage

      public void createParentTreeEntryForPage(PdfPage page)
      Creates and flushes parent tree entry for the page. Effectively this means that new content mustn't be added to the page.
      Parameters:
      page - PdfPage for which to create parent tree entry. Typically this page is flushed after this call.

    • savePageStructParentIndexIfNeeded

      public void savePageStructParentIndexIfNeeded(PdfPage page)

    • buildParentTree

      public PdfDictionary buildParentTree()

    • registerMcr

      public void registerMcr(PdfMcr mcr)

    • registerMcr

      private void registerMcr(PdfMcr mcr, boolean registeringOnInit)

    • unregisterMcr

      public void unregisterMcr(PdfMcr mcrToUnregister)

    • isModificationAllowed

      private boolean isModificationAllowed()

    • registerAllMcrs

      private void registerAllMcrs()

    • updateStructParentTreeEntries

      private boolean updateStructParentTreeEntries(PdfPage page, ParentTreeHandler.PageMcrsContainer mcrs)

    • updateStructParentTreeForContentStreamEntries

      private boolean updateStructParentTreeForContentStreamEntries(Map<Integer,PdfMcr> mcrsOfContentStream, int pageStructParentIndex)

    • getOrCreatePageStructParentIndex

      private int getOrCreatePageStructParentIndex(PdfPage page)

    • getStm

      private static PdfObject getStm(PdfMcr mcr)