Package org.fit.pdfdom

Class PDFDomTree

java.lang.Object

org.apache.pdfbox.contentstream.PDFStreamEngine

org.apache.pdfbox.text.PDFTextStripper

org.fit.pdfdom.PDFBoxTree

org.fit.pdfdom.PDFDomTree

public class PDFDomTree
extends PDFBoxTree

A DOM representation of a PDF file.

Author:

burgetr

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	PDFDomTree.HtmlDivLine	Maps input line to an HTML div rectangle, since HTML does not support standard lines

Field Summary

Fields

Modifier and Type	Field	Description
protected Element	body	The body element of the resulting document.
protected PDFDomTreeConfig	config
protected Element	curpage	The element representing the page currently being created in the resulting document.
protected String	defaultStyle	Default style placed in the begining of the resulting document
protected Document	doc	The resulting document representing the PDF file.
protected Element	globalStyle	The global style element of the resulting document.
protected Element	head	The head element of the resulting document.
protected int	pagecnt	Page counter for assigning IDs to the pages.
protected int	textcnt	Text element counter for assigning IDs to the text elements.
protected Element	title	The title element of the resulting document.

Fields inherited from class org.fit.pdfdom.PDFBoxTree

cssFontFamily, cssFontStyle, cssFontWeight, cur_x, cur_y, curstyle, disableGraphics, disableImageData, disableImages, endPage, fontTable, graphicsPath, lastDia, lastText, path_start_x, path_start_y, path_x, path_y, pdFontType, pdpage, startPage, style, textLine, textMetrics, UNIT

Fields inherited from class org.apache.pdfbox.text.PDFTextStripper

document, charactersByArticle, LINE_SEPARATOR, output

Constructor Summary

Constructors

Constructor	Description
PDFDomTree()	Creates a new PDF DOM parser.
PDFDomTree(PDFDomTreeConfig config)	Creates a new PDF DOM parser.

Method Summary

Modifier and Type	Method	Description
protected float	computeFontHeight(org.apache.pdfbox.pdmodel.font.PDFont arg0)
protected void	createDocument()	Creates a new empty HTML document tree.
Document	createDOM(org.apache.pdfbox.pdmodel.PDDocument doc)	Loads a PDF document and creates a DOM tree from it.
protected String	createFontFaces()
protected String	createGlobalStyle()	Generate the global CSS style for the whole document.
protected Element	createImageElement(float x, float y, float width, float height, ImageResource resource)	Creates an element that represents an image drawn at the specified coordinates in the page.
protected Element	createLineElement(float x1, float y1, float x2, float y2)	Create an element that represents a horizntal or vertical line.
protected Element	createPageElement()	Creates an element that represents a single page.
protected Element	createPathImage(List<PathSegment> path)
protected Element	createRectangleElement(float x, float y, float width, float height, boolean stroke, boolean fill)	Creates an element that represents a rectangle drawn at the specified coordinates in the page.
protected Element	createTextElement(float width)	Creates an element that represents a single positioned box with no content.
protected Element	createTextElement(String data, float width)	Creates an element that represents a single positioned box containing the specified text string.
protected void	endDocument(org.apache.pdfbox.pdmodel.PDDocument document)
Document	getDocument()	Obtains the resulting document tree.
protected void	renderImage(float x, float y, float width, float height, ImageResource resource)	Adds an image to the current page.
protected void	renderPath(List<PathSegment> path, boolean stroke, boolean fill)	Adds a rectangle to the current page on the specified position.
protected void	renderText(String data, TextMetrics metrics)	Creates a new text box in the current page.
protected void	showGlyph(org.apache.pdfbox.util.Matrix arg0, org.apache.pdfbox.pdmodel.font.PDFont arg1, int arg2, String arg3, org.apache.pdfbox.util.Vector arg4)
void	startDocument(org.apache.pdfbox.pdmodel.PDDocument document)
protected void	startNewPage()	Adds a new page to the resulting document and makes it a current (active) page.
protected void	updateFontTable()	Updates the font table by adding new fonts used at the current page.
void	writeText(org.apache.pdfbox.pdmodel.PDDocument doc, Writer outputStream)	Parses a PDF document and serializes the resulting DOM tree to an output.

Methods inherited from class org.fit.pdfdom.PDFBoxTree

colorString, colorString, colorString, createCurrentPageTransformation, finishBox, floatValue, getCurrentMediaBox, getDisableGraphics, getDisableImageData, getDisableImages, getEndPage, getLength, getStartPage, getTextDirectionality, getTextDirectionality, getTitle, intValue, isReversed, processImageOperation, processOperator, processPage, processTextPosition, setDisableGraphics, setDisableImageData, setDisableImages, setEndPage, setStartPage, stringValue, toRectangle, transformLength, transformPosition, updateStyle

Methods inherited from class org.apache.pdfbox.text.PDFTextStripper

endArticle, endPage, getAddMoreFormatting, getArticleEnd, getArticleStart, getAverageCharTolerance, getCurrentPageNo, getDropThreshold, getEndBookmark, getCharactersByArticle, getIndentThreshold, getLineSeparator, getListItemPatterns, getOutput, getPageEnd, getPageStart, getParagraphEnd, getParagraphStart, getSeparateByBeads, getSortByPosition, getSpacingTolerance, getStartBookmark, getSuppressDuplicateOverlappingText, getText, getWordSeparator, matchPattern, processPages, setAddMoreFormatting, setArticleEnd, setArticleStart, setAverageCharTolerance, setDropThreshold, setEndBookmark, setIndentThreshold, setLineSeparator, setListItemPatterns, setPageEnd, setPageStart, setParagraphEnd, setParagraphStart, setShouldSeparateByBeads, setSortByPosition, setSpacingTolerance, setStartBookmark, setSuppressDuplicateOverlappingText, setWordSeparator, startArticle, startArticle, startPage, writeCharacters, writeLineSeparator, writePage, writePageEnd, writePageStart, writeParagraphEnd, writeParagraphSeparator, writeParagraphStart, writeString, writeString, writeWordSeparator

Methods inherited from class org.apache.pdfbox.contentstream.PDFStreamEngine

addOperator, applyTextAdjustment, beginMarkedContentSequence, beginText, decreaseLevel, endMarkedContentSequence, endText, getAppearance, getCurrentPage, getGraphicsStackSize, getGraphicsState, getInitialMatrix, getLevel, getResources, getTextLineMatrix, getTextMatrix, increaseLevel, operatorException, processAnnotation, processChildStream, processOperator, processSoftMask, processTilingPattern, processTilingPattern, processTransparencyGroup, processType3Stream, registerOperatorProcessor, restoreGraphicsStack, restoreGraphicsState, saveGraphicsStack, saveGraphicsState, setLineDashPattern, setTextLineMatrix, setTextMatrix, showAnnotation, showFontGlyph, showFontGlyph, showForm, showGlyph, showText, showTextString, showTextStrings, showTransparencyGroup, showType3Glyph, showType3Glyph, transformedPoint, transformWidth, unsupportedOperator

Methods inherited from class java.lang.Object

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

Field Detail

defaultStyle

protected String defaultStyle

Default style placed in the begining of the resulting document

doc

protected Document doc

The resulting document representing the PDF file.

head

protected Element head

The head element of the resulting document.

body

protected Element body

The body element of the resulting document.

title

protected Element title

The title element of the resulting document.

globalStyle

protected Element globalStyle

The global style element of the resulting document.

curpage

protected Element curpage

The element representing the page currently being created in the resulting document.

textcnt

protected int textcnt

Text element counter for assigning IDs to the text elements.

pagecnt

protected int pagecnt

Page counter for assigning IDs to the pages.

config

protected PDFDomTreeConfig config

Constructor Detail

PDFDomTree

public PDFDomTree()
           throws IOException

Creates a new PDF DOM parser.

Throws:

IOException

PDFDomTree

public PDFDomTree(PDFDomTreeConfig config)
           throws IOException

Creates a new PDF DOM parser.

Throws:

IOException

Method Detail

createDocument

protected void createDocument()
                       throws ParserConfigurationException

Creates a new empty HTML document tree.

Throws:

ParserConfigurationException

getDocument

public Document getDocument()

Obtains the resulting document tree.

Returns:

The DOM root element.

startDocument

public void startDocument(org.apache.pdfbox.pdmodel.PDDocument document)
                   throws IOException

Overrides:

startDocument in class org.apache.pdfbox.text.PDFTextStripper

Throws:

IOException

endDocument

protected void endDocument(org.apache.pdfbox.pdmodel.PDDocument document)
                    throws IOException

Overrides:

endDocument in class org.apache.pdfbox.text.PDFTextStripper

Throws:

IOException

writeText

public void writeText(org.apache.pdfbox.pdmodel.PDDocument doc,
                      Writer outputStream)
               throws IOException

Parses a PDF document and serializes the resulting DOM tree to an output. This requires a DOM Level 3 capable implementation to be available.

Overrides:

writeText in class org.apache.pdfbox.text.PDFTextStripper

Throws:

IOException

createDOM

public Document createDOM(org.apache.pdfbox.pdmodel.PDDocument doc)
                   throws IOException

Loads a PDF document and creates a DOM tree from it.

Parameters:

doc - the source document

Returns:

a DOM Document representing the DOM tree

Throws:

IOException

startNewPage

protected void startNewPage()

Description copied from class: PDFBoxTree

Adds a new page to the resulting document and makes it a current (active) page.

Specified by:

startNewPage in class PDFBoxTree

renderText

protected void renderText(String data,
                          TextMetrics metrics)

Description copied from class: PDFBoxTree

Creates a new text box in the current page. The style and position of the text are contained in the PDFBoxTree.curstyle property.

Specified by:

renderText in class PDFBoxTree

Parameters:

data - The text contents.

renderPath

protected void renderPath(List<PathSegment> path,
                          boolean stroke,
                          boolean fill)
                   throws IOException

Description copied from class: PDFBoxTree

Adds a rectangle to the current page on the specified position.

Specified by:

renderPath in class PDFBoxTree

stroke - should there be a stroke around?

fill - should the rectangle be filled?

Throws:

IOException

renderImage

protected void renderImage(float x,
                           float y,
                           float width,
                           float height,
                           ImageResource resource)
                    throws IOException

Description copied from class: PDFBoxTree

Adds an image to the current page.

Specified by:

renderImage in class PDFBoxTree

Parameters:

x - the X coordinate of the image

y - the Y coordinate of the image

width - the width coordinate of the image

height - the height coordinate of the image

resource - the image data depending on the specified type

Throws:

IOException

createPageElement

protected Element createPageElement()

Creates an element that represents a single page.

Returns:

the resulting DOM element

createTextElement

protected Element createTextElement(float width)

Creates an element that represents a single positioned box with no content.

Returns:

the resulting DOM element

createTextElement

protected Element createTextElement(String data,
                                    float width)

Creates an element that represents a single positioned box containing the specified text string.

Parameters:

data - the text string to be contained in the created box.

Returns:

the resulting DOM element

createRectangleElement

protected Element createRectangleElement(float x,
                                         float y,
                                         float width,
                                         float height,
                                         boolean stroke,
                                         boolean fill)

Creates an element that represents a rectangle drawn at the specified coordinates in the page.

Parameters:

x - the X coordinate of the rectangle

y - the Y coordinate of the rectangle

width - the width of the rectangle

height - the height of the rectangle

stroke - should there be a stroke around?

fill - should the rectangle be filled?

Returns:

the resulting DOM element

createLineElement

protected Element createLineElement(float x1,
                                    float y1,
                                    float x2,
                                    float y2)

Create an element that represents a horizntal or vertical line.

Parameters:

x1 -

y1 -

x2 -

y2 -

Returns:

the created DOM element

createPathImage

protected Element createPathImage(List<PathSegment> path)
                           throws IOException

Throws:

IOException

createImageElement

protected Element createImageElement(float x,
                                     float y,
                                     float width,
                                     float height,
                                     ImageResource resource)
                              throws IOException

Creates an element that represents an image drawn at the specified coordinates in the page.

Parameters:

x - the X coordinate of the image

y - the Y coordinate of the image

width - the width coordinate of the image

height - the height coordinate of the image

type - the image type: "png" or "jpeg"

resource - the image data depending on the specified type

Returns:

Throws:

IOException

createGlobalStyle

protected String createGlobalStyle()

Generate the global CSS style for the whole document.

Returns:

the CSS code used in the generated document header

updateFontTable

protected void updateFontTable()

Description copied from class: PDFBoxTree

Updates the font table by adding new fonts used at the current page.

Overrides:

updateFontTable in class PDFBoxTree

createFontFaces

protected String createFontFaces()

showGlyph

protected void showGlyph(org.apache.pdfbox.util.Matrix arg0,
                         org.apache.pdfbox.pdmodel.font.PDFont arg1,
                         int arg2,
                         String arg3,
                         org.apache.pdfbox.util.Vector arg4)
                  throws IOException

Overrides:

showGlyph in class org.apache.pdfbox.contentstream.PDFStreamEngine

Throws:

IOException

computeFontHeight

protected float computeFontHeight(org.apache.pdfbox.pdmodel.font.PDFont arg0)
                           throws IOException

Throws:

IOException