com.itextpdf.svg.renderers

Class SvgDrawContext

java.lang.Object

com.itextpdf.svg.renderers.SvgDrawContext

public class SvgDrawContext
extends Object

The SvgDrawContext keeps a stack of PdfCanvas instances, which represent all levels of XObjects that are added to the root canvas.

Constructor Summary

Constructors

Constructor and Description
SvgDrawContext(ResourceResolver resourceResolver, FontProvider fontProvider) Create an instance of the context that is used to store information when converting SVG.
SvgDrawContext(ResourceResolver resourceResolver, FontProvider fontProvider, ISvgNodeRenderer svgRootRenderer) Create an instance of the context that is used to store information when converting SVG.

Method Summary

Modifier and Type	Method and Description
void	addNamedObject(String name, ISvgNodeRenderer namedObject) Adds a named object to the draw context.
void	addNamedObjects(Map<String,ISvgNodeRenderer> namedObjects) * Adds a number of named object to the draw context.
void	addTextMove(float additionalMoveX, float additionalMoveY) Increment the stored text move
void	addUsedId(String elementId) Adds an ID that has been referenced by a use element.
void	addViewPort(Rectangle viewPort) Adds a viewbox to the context.
PdfCanvas	getCurrentCanvas() Retrieves the current top of the stack, without modifying the stack.
AffineTransform	getCurrentCanvasTransform() Get the current canvas transformation
Rectangle	getCurrentViewPort() Get the current viewbox.
FontProvider	getFontProvider() Gets the FontProvider to be used during the drawing operations.
AffineTransform	getLastTextTransform() Get the text transformation that was last applied
ISvgNodeRenderer	getNamedObject(String name) Get a named object based on its name.
float	getRemValue() Return the value of root svg element font-size
ResourceResolver	getResourceResolver() Gets the ResourceResolver to be used during the drawing operations.
Rectangle	getRootViewPort() Get the viewbox which is the root viewport for the current document.
FontSet	getTempFonts() Gets list of temporary fonts from @font-face.
float[]	getTextMove() Get the stored current text move
boolean	isIdUsedByUseTagBefore(String elementId) Returns true when this id has been used before
PdfCanvas	popCanvas() Retrieves the current top of the stack, thereby taking the current item off the stack.
void	pushCanvas(PdfCanvas canvas) Adds a PdfCanvas to the stack (by definition its top), for use in drawing operations.
void	removeCurrentViewPort() Remove the currently set view box.
void	removeUsedId(String elementId) Removes an ID that has been referenced by a use element.
void	resetTextMove() Reset the stored text move to [0f,0f]
void	setLastTextTransform(AffineTransform newTransform) Set the last text transformation
void	setTempFonts(FontSet tempFonts) Sets the FontSet.
int	size() Get the current size of the stack, signifying the nesting level of the XObjects.

Methods inherited from class java.lang.Object

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

Constructor Detail

SvgDrawContext

public SvgDrawContext(ResourceResolver resourceResolver,
                      FontProvider fontProvider)

Create an instance of the context that is used to store information when converting SVG.

Parameters:

resourceResolver - instance of ResourceResolver

fontProvider - instance of FontProvider

SvgDrawContext

public SvgDrawContext(ResourceResolver resourceResolver,
                      FontProvider fontProvider,
                      ISvgNodeRenderer svgRootRenderer)

Create an instance of the context that is used to store information when converting SVG.

Parameters:

resourceResolver - instance of ResourceResolver

fontProvider - instance of FontProvider

svgRootRenderer - svg element that is root for current file

Method Detail

getCurrentCanvas

public PdfCanvas getCurrentCanvas()

Retrieves the current top of the stack, without modifying the stack.

Returns:

the current canvas that can be used for drawing operations.

popCanvas

public PdfCanvas popCanvas()

Retrieves the current top of the stack, thereby taking the current item off the stack.

Returns:

the current canvas that can be used for drawing operations.

pushCanvas

public void pushCanvas(PdfCanvas canvas)

Adds a PdfCanvas to the stack (by definition its top), for use in drawing operations.

Parameters:

canvas - the new top of the stack

size

public int size()

Get the current size of the stack, signifying the nesting level of the XObjects.

Returns:

the current size of the stack.

addViewPort

public void addViewPort(Rectangle viewPort)

Adds a viewbox to the context.

Parameters:

viewPort - rectangle representing the current viewbox

getCurrentViewPort

public Rectangle getCurrentViewPort()

Get the current viewbox.

Returns:

the viewbox as it is currently set

getRootViewPort

public Rectangle getRootViewPort()

Get the viewbox which is the root viewport for the current document.

Returns:

root viewbox.

removeCurrentViewPort

public void removeCurrentViewPort()

Remove the currently set view box.

addNamedObject

public void addNamedObject(String name,
                           ISvgNodeRenderer namedObject)

Adds a named object to the draw context. These objects can then be referenced from a different tag.

Parameters:

name - name of the object

namedObject - object to be referenced

getNamedObject

public ISvgNodeRenderer getNamedObject(String name)

Get a named object based on its name. If the name isn't listed, this method will return null.

Parameters:

name - name of the object you want to reference

Returns:

the referenced object

getResourceResolver

public ResourceResolver getResourceResolver()

Gets the ResourceResolver to be used during the drawing operations.

Returns:

resource resolver instance

addNamedObjects

public void addNamedObjects(Map<String,ISvgNodeRenderer> namedObjects)

* Adds a number of named object to the draw context. These objects can then be referenced from a different tag.

Parameters:

namedObjects - Map containing the named objects keyed to their ID strings

getFontProvider

public FontProvider getFontProvider()

Gets the FontProvider to be used during the drawing operations.

Returns:

font provider instance

getTempFonts

public FontSet getTempFonts()

Gets list of temporary fonts from @font-face.

Returns:

font set instance

setTempFonts

public void setTempFonts(FontSet tempFonts)

Sets the FontSet.

Parameters:

tempFonts - font set to be used during drawing operations

isIdUsedByUseTagBefore

public boolean isIdUsedByUseTagBefore(String elementId)

Returns true when this id has been used before

Parameters:

elementId - element id to check

Returns:

true if id has been encountered before through a use element

addUsedId

public void addUsedId(String elementId)

Adds an ID that has been referenced by a use element.

Parameters:

elementId - referenced element ID

removeUsedId

public void removeUsedId(String elementId)

Removes an ID that has been referenced by a use element.

Parameters:

elementId - referenced element ID

getLastTextTransform

public AffineTransform getLastTextTransform()

Get the text transformation that was last applied

Returns:

AffineTransform representing the last text transformation

setLastTextTransform

public void setLastTextTransform(AffineTransform newTransform)

Set the last text transformation

Parameters:

newTransform - last text transformation

getTextMove

public float[] getTextMove()

Get the stored current text move

Returns:

[horizontal text move, vertical text move]

resetTextMove

public void resetTextMove()

Reset the stored text move to [0f,0f]

addTextMove

public void addTextMove(float additionalMoveX,
                        float additionalMoveY)

Increment the stored text move

Parameters:

additionalMoveX - horizontal value to add

additionalMoveY - vertical value to add

getCurrentCanvasTransform

public AffineTransform getCurrentCanvasTransform()

Get the current canvas transformation

Returns:

the AffineTransform representing the current canvas transformation

getRemValue

public float getRemValue()

Return the value of root svg element font-size

Returns:

rem value