Package com.itextpdf.text.pdf.parser

Class SimpleTextExtractionStrategy

java.lang.Object
com.itextpdf.text.pdf.parser.SimpleTextExtractionStrategy
All Implemented Interfaces:
RenderListener, TextExtractionStrategy
public class SimpleTextExtractionStrategy extends Object implements TextExtractionStrategy
A simple text extraction renderer. This renderer keeps track of the current Y position of each string. If it detects that the y position has changed, it inserts a line break into the output. If the PDF renders text in a non-top-to-bottom fashion, this will result in the text not being a true representation of how it appears in the PDF. This renderer also uses a simple strategy based on the font metrics to determine if a blank space should be inserted into the output.
Since:
2.1.5

  • Field Details

    • lastStart

      private Vector lastStart

    • lastEnd

      private Vector lastEnd

    • result

      private final StringBuffer result
      used to store the resulting String.

  • Constructor Details

    • SimpleTextExtractionStrategy

      public SimpleTextExtractionStrategy()
      Creates a new text extraction renderer.

  • Method Details

    • beginTextBlock

      public void beginTextBlock()
      Description copied from interface: RenderListener
      Called when a new text block is beginning (i.e. BT)
      Specified by:
      beginTextBlock in interface RenderListener
      Since:
      5.0.1

    • endTextBlock

      public void endTextBlock()
      Description copied from interface: RenderListener
      Called when a text block has ended (i.e. ET)
      Specified by:
      endTextBlock in interface RenderListener
      Since:
      5.0.1

    • getResultantText

      public String getResultantText()
      Returns the result so far.
      Specified by:
      getResultantText in interface TextExtractionStrategy
      Returns:
      a String with the resulting text.

    • appendTextChunk

      protected final void appendTextChunk(CharSequence text)
      Used to actually append text to the text results. Subclasses can use this to insert text that wouldn't normally be included in text parsing (e.g. result of OCR performed against image content)
      Parameters:
      text - the text to append to the text results accumulated so far

    • renderText

      public void renderText(TextRenderInfo renderInfo)
      Captures text using a simplified algorithm for inserting hard returns and spaces
      Specified by:
      renderText in interface RenderListener
      Parameters:
      renderInfo - render info

    • renderImage

      public void renderImage(ImageRenderInfo renderInfo)
      no-op method - this renderer isn't interested in image events
      Specified by:
      renderImage in interface RenderListener
      Parameters:
      renderInfo - information specifying what to render
      Since:
      5.0.1
      See Also: