com.itextpdf.text.pdf.parser
Class SimpleTextExtractingPdfContentRenderListener

java.lang.Object
  com.itextpdf.text.pdf.parser.SimpleTextExtractingPdfContentRenderListener

All Implemented Interfaces:

RenderListener, TextProvidingRenderListener

public class SimpleTextExtractingPdfContentRenderListener
extends Object
implements TextProvidingRenderListener

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 Summary

private Vector	lastEnd
private Vector	lastStart
private StringBuffer	result used to store the resulting String.

Constructor Summary

SimpleTextExtractingPdfContentRenderListener()
Creates a new text extraction renderer.

Method Summary

void	beginTextBlock() Called when a new text block is beginning (i.e.
void	endTextBlock() Called when a text block has ended (i.e.
String	getResultantText() Returns the result so far.
void	renderImage(ImageRenderInfo renderInfo) no-op method - this renderer isn't interested in image events
void	renderText(TextRenderInfo renderInfo) Captures text using a simplified algorithm for inserting hard returns and spaces
void	reset() Resets the internal state of the RenderListener

Methods inherited from class java.lang.Object

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

Field Detail

lastStart

private Vector lastStart

lastEnd

private Vector lastEnd

result

private StringBuffer result

used to store the resulting String.

Constructor Detail

SimpleTextExtractingPdfContentRenderListener

public SimpleTextExtractingPdfContentRenderListener()

Creates a new text extraction renderer.

Method Detail

reset

public void reset()

Description copied from interface: RenderListener

Resets the internal state of the RenderListener

Specified by:

reset in interface RenderListener

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 TextProvidingRenderListener

Returns:

a String with the resulting text.

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:

RenderListener.renderImage(com.itextpdf.text.pdf.parser.ImageRenderInfo)