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## org.apache.fop.render.intermediate
Class IFSerializer

    java.lang.Object
      org.apache.fop.render.intermediate.AbstractIFDocumentHandler
          org.apache.fop.render.intermediate.AbstractXMLWritingIFDocumentHandler
              org.apache.fop.render.intermediate.IFSerializer

All Implemented Interfaces:
  IFConstants, IFDocumentHandler, IFDocumentNavigationHandler, IFPainter, XMLConstants

    public class IFSerializer

extends AbstractXMLWritingIFDocumentHandler
implements IFConstants, IFPainter, IFDocumentNavigationHandler

IFPainter implementation that serializes the intermediate format to XML.

Field Summary
`static java.lang.String` | `VERSION` Intermediate Format (IF) version, used to express an @version attribute in the root element of the IF document, the initial value of which is set to '2.0' to signify that something preceded it (but didn't happen to be marked as such), and that this version is not necessarily backwards compatible with the unmarked (<2.0) version.

Fields inherited from class org.apache.fop.render.intermediate.AbstractXMLWritingIFDocumentHandler
`handler, tFactory`

Fields inherited from interface org.apache.fop.render.intermediate.IFConstants
`EL_BORDER_RECT, EL_CLIP_RECT, EL_DOCUMENT, EL_FONT, EL_GROUP, EL_HEADER, EL_ID, EL_IMAGE, EL_LINE, EL_LOCALE, EL_PAGE, EL_PAGE_CONTENT, EL_PAGE_HEADER, EL_PAGE_SEQUENCE, EL_PAGE_TRAILER, EL_RECT, EL_STRUCTURE_TREE, EL_TEXT, EL_TRAILER, EL_VIEWPORT, MIME_TYPE, NAMESPACE`

Fields inherited from interface org.apache.fop.util.XMLConstants
`CDATA, XLINK_HREF, XLINK_NAMESPACE, XLINK_PREFIX, XML_NAMESPACE, XML_PREFIX, XML_SPACE, XMLNS_NAMESPACE_URI, XMLNS_PREFIX`

Constructor Summary
`IFSerializer(IFContext context)`

Method Summary
`void` | `addResolvedAction(AbstractAction action)`
`void` | `clipBackground(java.awt.Rectangle rect, BorderProps bpsBefore, BorderProps bpsAfter, BorderProps bpsStart, BorderProps bpsEnd)` Restricts the current clipping region to the inner border.
`void` | `clipRect(java.awt.Rectangle rect)` Restricts the current clipping region with the given rectangle.
`protected RenderingContext` | `createRenderingContext()`
`void` | `drawBorderRect(java.awt.Rectangle rect, BorderProps top, BorderProps bottom, BorderProps left, BorderProps right, java.awt.Color innerBackgroundColor)` Draws a border rectangle.
`void` | `drawImage(org.w3c.dom.Document doc, java.awt.Rectangle rect)` Draws an image (represented by a DOM document) inside a given rectangle.
`void` | `drawImage(java.lang.String uri, java.awt.Rectangle rect)` Draws an image identified by a URI inside a given rectangle.
`void` | `drawLine(java.awt.Point start, java.awt.Point end, int width, java.awt.Color color, RuleStyle style)` Draws a line.
`void` | `drawText(int x, int y, int letterSpacing, int wordSpacing, int[][] dp, java.lang.String text)` Draws text.
`void` | `endDocument()` Indicates the end of a document.
`void` | `endDocumentHeader()` Indicates the end of the document header.
`void` | `endDocumentTrailer()` Indicates the end of the document trailer.
`void` | `endGroup()` Ends the current group and restores the previous coordinate system (and layer).
`void` | `endPage()` Indicates the end of a page
`void` | `endPageContent()` Indicates the end of the page content.
`void` | `endPageHeader()` Indicates the end of the page header.
`void` | `endPageSequence()` Indicates the end of a page sequence.
`void` | `endPageTrailer()` Indicates the end of the page trailer.
`void` | `endViewport()` Ends the current viewport and restores the previous coordinate system.
`void` | `fillRect(java.awt.Rectangle rect, java.awt.Paint fill)` Fills a rectangular area.
`IFDocumentHandlerConfigurator` | `getConfigurator()` Returns the configurator for this document handler, if any.
`IFDocumentNavigationHandler` | `getDocumentNavigationHandler()` Returns a document navigation handler if this feature is supported.
`FontInfo` | `getFontInfo()` Returns the font set to work with.
`protected java.lang.String` | `getMainNamespace()` Returns the main namespace used for generated XML content.
`java.lang.String` | `getMimeType()` Returns the MIME type of the output format that is generated by this implementation.
`IFDocumentHandler` | `getMimickedDocumentHandler()` Returns the document handler that is being mimicked by this serializer.
`StructureTreeEventHandler` | `getStructureTreeEventHandler()`
`void` | `handleExtensionObject(java.lang.Object extension)` Handles an extension object.
`boolean` | `isBackgroundRequired(BorderProps bpsTop, BorderProps bpsBottom, BorderProps bpsLeft, BorderProps bpsRight)` TODO Painter-specific rounded borders logic required background drawing to be made optional.
`void` | `mimicDocumentHandler(IFDocumentHandler targetHandler)` Tells this serializer to mimic the given document handler (mostly applies to the font set that is used during layout).
`void` | `renderBookmarkTree(BookmarkTree tree)` Render the bookmark tree.
`void` | `renderLink(Link link)`
`void` | `renderNamedDestination(NamedDestination destination)` Renders a named destination.
`void` | `setDefaultFontInfo(FontInfo fontInfo)` Sets the default font set (with no custom configuration).
`void` | `setDocumentLocale(java.util.Locale locale)`
`void` | `setFont(java.lang.String family, java.lang.String style, java.lang.Integer weight, java.lang.String variant, java.lang.Integer size, java.awt.Color color)` Updates the current font.
`void` | `setFontInfo(FontInfo fontInfo)` Sets the font set to work with.
`void` | `startDocument()` Indicates the start of a document.
`void` | `startDocumentHeader()` Indicates the start of the document header.
`void` | `startDocumentTrailer()` Indicates the start of the document trailer.
`void` | `startGroup(java.awt.geom.AffineTransform[] transforms, java.lang.String layer)` Starts a new group of graphical elements.
`void` | `startGroup(java.awt.geom.AffineTransform transform, java.lang.String layer)` Starts a new group of graphical elements.
`void` | `startPage(int index, java.lang.String name, java.lang.String pageMasterName, java.awt.Dimension size)` Indicates the start of a new page.
`IFPainter` | `startPageContent()` Indicates the start of the page content.
`void` | `startPageHeader()` Indicates the start of the page header.
`void` | `startPageSequence(java.lang.String id)` Indicates the start of a new page sequence.
`void` | `startPageTrailer()` Indicates the start of the page trailer.
`void` | `startViewport(java.awt.geom.AffineTransform[] transforms, java.awt.Dimension size, java.awt.Rectangle clipRect)` Starts a new viewport, establishing a new coordinate system.
`void` | `startViewport(java.awt.geom.AffineTransform transform, java.awt.Dimension size, java.awt.Rectangle clipRect)` Starts a new viewport, establishing a new coordinate system.
`boolean` | `supportsPagesOutOfOrder()` Indicates whether the painter supports to handle the pages in mixed order rather than ascending order.

Methods inherited from class org.apache.fop.render.intermediate.AbstractXMLWritingIFDocumentHandler
`createContentHandler, setResult`

Methods inherited from class org.apache.fop.render.intermediate.AbstractIFDocumentHandler
`getContext, getUserAgent`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### VERSION

    public static final java.lang.String VERSION

  Intermediate Format (IF) version, used to express an @version attribute in the root element of the IF document, the initial value of which is set to '2.0' to signify that something preceded it (but didn't happen to be marked as such), and that this version is not necessarily backwards compatible with the unmarked (<2.0) version.

  See Also:
    Constant Field Values

Constructor Detail

### IFSerializer

    public IFSerializer(IFContext context)

Method Detail

### getMainNamespace

    protected java.lang.String getMainNamespace()

  Returns the main namespace used for generated XML content.

  Specified by:
    `getMainNamespace` in class `AbstractXMLWritingIFDocumentHandler`
  Returns:
    the main namespace

### supportsPagesOutOfOrder

    public boolean supportsPagesOutOfOrder()

  Indicates whether the painter supports to handle the pages in mixed order rather than ascending order.

  Specified by:
    `supportsPagesOutOfOrder` in interface `IFDocumentHandler`
  Returns:
    true if out-of-order handling is supported

### getMimeType

    public java.lang.String getMimeType()

  Returns the MIME type of the output format that is generated by this implementation.

  Specified by:
    `getMimeType` in interface `IFDocumentHandler`
  Returns:
    the MIME type

### getConfigurator

    public IFDocumentHandlerConfigurator getConfigurator()

  Returns the configurator for this document handler, if any.

  Specified by:
    `getConfigurator` in interface `IFDocumentHandler`
  Returns:
    the configurator or null if there's no configurator

### getDocumentNavigationHandler

    public IFDocumentNavigationHandler getDocumentNavigationHandler()

  Returns a document navigation handler if this feature is supported.

  Specified by:
    `getDocumentNavigationHandler` in interface `IFDocumentHandler`
  Overrides:
    `getDocumentNavigationHandler` in class `AbstractIFDocumentHandler`
  Returns:
    the document navigation handler or null if not supported

### mimicDocumentHandler

    public void mimicDocumentHandler(IFDocumentHandler targetHandler)

  Tells this serializer to mimic the given document handler (mostly applies to the font set that is used during layout).

  Parameters:
    `targetHandler` - the document handler to mimic

### getMimickedDocumentHandler

    public IFDocumentHandler getMimickedDocumentHandler()

  Returns the document handler that is being mimicked by this serializer.

  Returns:
    the mimicked document handler or null if no such document handler has been set

### getFontInfo

    public FontInfo getFontInfo()

  Returns the font set to work with.

  Specified by:
    `getFontInfo` in interface `IFDocumentHandler`
  Returns:
    the font info object

### setFontInfo

    public void setFontInfo(FontInfo fontInfo)

  Sets the font set to work with.

  Specified by:
    `setFontInfo` in interface `IFDocumentHandler`
  Parameters:
    `fontInfo` - the font info object

### setDefaultFontInfo

    public void setDefaultFontInfo(FontInfo fontInfo)

  Sets the default font set (with no custom configuration).

  Specified by:
    `setDefaultFontInfo` in interface `IFDocumentHandler`
  Parameters:
    `fontInfo` - the font info object to populate

### getStructureTreeEventHandler

    public StructureTreeEventHandler getStructureTreeEventHandler()

  Description copied from class: `AbstractIFDocumentHandler`

  Specified by:
    `getStructureTreeEventHandler` in interface `IFDocumentHandler`
  Overrides:
    `getStructureTreeEventHandler` in class `AbstractIFDocumentHandler`
  Returns:
    the structure tree builder

### startDocument

    public void startDocument()
                       throws IFException

  Indicates the start of a document. This method may only be called once before any other event method.

  Specified by:
    `startDocument` in interface `IFDocumentHandler`
  Overrides:
    `startDocument` in class `AbstractIFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### setDocumentLocale

    public void setDocumentLocale(java.util.Locale locale)

  Description copied from class: `AbstractIFDocumentHandler`

  Specified by:
    `setDocumentLocale` in interface `IFDocumentHandler`
  Overrides:
    `setDocumentLocale` in class `AbstractIFDocumentHandler`
  Parameters:
    `locale` - Locale of the document.

### startDocumentHeader

    public void startDocumentHeader()
                             throws IFException

  Indicates the start of the document header. This method is called right after the `IFDocumentHandler.startDocument()` method. Extensions sent to this painter between `IFDocumentHandler.startDocumentHeader()` and `IFDocumentHandler.endDocumentHeader()` apply to the document as a whole (like document metadata).

  Specified by:
    `startDocumentHeader` in interface `IFDocumentHandler`
  Overrides:
    `startDocumentHeader` in class `AbstractIFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### endDocumentHeader

    public void endDocumentHeader()
                           throws IFException

  Indicates the end of the document header. This method is called before the first page sequence.

  Specified by:
    `endDocumentHeader` in interface `IFDocumentHandler`
  Overrides:
    `endDocumentHeader` in class `AbstractIFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### startDocumentTrailer

    public void startDocumentTrailer()
                              throws IFException

  Indicates the start of the document trailer. This method is called after the last page sequence. Extensions sent to the painter between `IFDocumentHandler.startDocumentTrailer()` and `IFDocumentHandler.endDocumentTrailer()` apply to the document as a whole and is used for document-level content that is only known after all pages have been rendered (like named destinations or the bookmark tree).

  Specified by:
    `startDocumentTrailer` in interface `IFDocumentHandler`
  Overrides:
    `startDocumentTrailer` in class `AbstractIFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### endDocumentTrailer

    public void endDocumentTrailer()
                            throws IFException

  Indicates the end of the document trailer. This method is called right before the `IFDocumentHandler.endDocument()` method.

  Specified by:
    `endDocumentTrailer` in interface `IFDocumentHandler`
  Overrides:
    `endDocumentTrailer` in class `AbstractIFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### endDocument

    public void endDocument()
                     throws IFException

  Indicates the end of a document. This method may only be called once after the whole document has been handled. Implementations can release resources (close streams). It is an error to call any event method after this method.

  Specified by:
    `endDocument` in interface `IFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### startPageSequence

    public void startPageSequence(java.lang.String id)
                           throws IFException

  Indicates the start of a new page sequence.

  Specified by:
    `startPageSequence` in interface `IFDocumentHandler`
  Parameters:
    `id` - the page sequence's identifier (or null if none is available)
  Throws:
    `IFException` - if an error occurs while handling this event

### endPageSequence

    public void endPageSequence()
                         throws IFException

  Indicates the end of a page sequence.

  Specified by:
    `endPageSequence` in interface `IFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### startPage

    public void startPage(int index,
                          java.lang.String name,
                          java.lang.String pageMasterName,
                          java.awt.Dimension size)
                   throws IFException

  Indicates the start of a new page.

  Specified by:
    `startPage` in interface `IFDocumentHandler`
  Parameters:
    `index` - the index of the page (0-based)
    `name` - the page name (usually the formatted page number)
    `pageMasterName` - the name of the simple-page-master that generated this page
    `size` - the size of the page (equivalent to the MediaBox in PDF)
  Throws:
    `IFException` - if an error occurs while handling this event

### startPageHeader

    public void startPageHeader()
                         throws IFException

  Indicates the start of the page header.

  Specified by:
    `startPageHeader` in interface `IFDocumentHandler`
  Overrides:
    `startPageHeader` in class `AbstractIFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### endPageHeader

    public void endPageHeader()
                       throws IFException

  Indicates the end of the page header.

  Specified by:
    `endPageHeader` in interface `IFDocumentHandler`
  Overrides:
    `endPageHeader` in class `AbstractIFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### startPageContent

    public IFPainter startPageContent()
                               throws IFException

  Indicates the start of the page content. The method returns an `IFPainter` interface which is used to paint the page contents.

  Specified by:
    `startPageContent` in interface `IFDocumentHandler`
  Returns:
    the IFPainter for the page content
  Throws:
    `IFException` - if an error occurs while handling this event

### endPageContent

    public void endPageContent()
                        throws IFException

  Indicates the end of the page content. Calls to the `IFPainter` returned by the respective `IFDocumentHandler.startPageContent()` method are illegal.

  Specified by:
    `endPageContent` in interface `IFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### startPageTrailer

    public void startPageTrailer()
                          throws IFException

  Indicates the start of the page trailer. The page trailer is used for writing down page elements which are only know after handling the page itself (like PDF targets).

  Specified by:
    `startPageTrailer` in interface `IFDocumentHandler`
  Overrides:
    `startPageTrailer` in class `AbstractIFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### endPageTrailer

    public void endPageTrailer()
                        throws IFException

  Indicates the end of the page trailer.

  Specified by:
    `endPageTrailer` in interface `IFDocumentHandler`
  Overrides:
    `endPageTrailer` in class `AbstractIFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### endPage

    public void endPage()
                 throws IFException

  Indicates the end of a page

  Specified by:
    `endPage` in interface `IFDocumentHandler`
  Throws:
    `IFException` - if an error occurs while handling this event

### startViewport

    public void startViewport(java.awt.geom.AffineTransform transform,
                              java.awt.Dimension size,
                              java.awt.Rectangle clipRect)
                       throws IFException

  Starts a new viewport, establishing a new coordinate system. A viewport has a size and can optionally be clipped. Corresponds to SVG's svg element.

  Specified by:
    `startViewport` in interface `IFPainter`
  Parameters:
    `transform` - the transformation matrix establishing the new coordinate system
    `size` - the size of the viewport
    `clipRect` - the clipping rectangle (may be null)
  Throws:
    `IFException` - if an error occurs while handling this element

### startViewport

    public void startViewport(java.awt.geom.AffineTransform[] transforms,
                              java.awt.Dimension size,
                              java.awt.Rectangle clipRect)
                       throws IFException

  Starts a new viewport, establishing a new coordinate system. A viewport has a size and can optionally be clipped. Corresponds to SVG's svg element.

  Specified by:
    `startViewport` in interface `IFPainter`
  Parameters:
    `transforms` - a series of transformation matrices establishing the new coordinate system
    `size` - the size of the viewport
    `clipRect` - the clipping rectangle (may be null)
  Throws:
    `IFException` - if an error occurs while handling this element

### endViewport

    public void endViewport()
                     throws IFException

  Ends the current viewport and restores the previous coordinate system.

  Specified by:
    `endViewport` in interface `IFPainter`
  Throws:
    `IFException` - if an error occurs while handling this element

### startGroup

    public void startGroup(java.awt.geom.AffineTransform[] transforms,
                           java.lang.String layer)
                    throws IFException

  Starts a new group of graphical elements. Corresponds to SVG's g element.

  Specified by:
    `startGroup` in interface `IFPainter`
  Parameters:
    `transforms` - a series of transformation matrices establishing the new coordinate system
    `layer` - an optional layer label (or null if none)
  Throws:
    `IFException` - if an error occurs while handling this element

### startGroup

    public void startGroup(java.awt.geom.AffineTransform transform,
                           java.lang.String layer)
                    throws IFException

  Starts a new group of graphical elements. Corresponds to SVG's g element.

  Specified by:
    `startGroup` in interface `IFPainter`
  Parameters:
    `transform` - the transformation matrix establishing the new coordinate system
    `layer` - an optional layer label (or null if none)
  Throws:
    `IFException` - if an error occurs while handling this element

### endGroup

    public void endGroup()
                  throws IFException

  Ends the current group and restores the previous coordinate system (and layer).

  Specified by:
    `endGroup` in interface `IFPainter`
  Throws:
    `IFException` - if an error occurs while handling this element

### drawImage

    public void drawImage(java.lang.String uri,
                          java.awt.Rectangle rect)
                   throws IFException

  Draws an image identified by a URI inside a given rectangle. This is the equivalent to an fo:external-graphic in XSL-FO.

  Specified by:
    `drawImage` in interface `IFPainter`
  Parameters:
    `uri` - the image's URI
    `rect` - the rectangle in which the image shall be painted
  Throws:
    `IFException` - if an error occurs while handling this event

### drawImage

    public void drawImage(org.w3c.dom.Document doc,
                          java.awt.Rectangle rect)
                   throws IFException

  Draws an image (represented by a DOM document) inside a given rectangle. This is the equivalent to an fo:instream-foreign-object in XSL-FO.

  Specified by:
    `drawImage` in interface `IFPainter`
  Parameters:
    `doc` - the DOM document containing the foreign object
    `rect` - the rectangle in which the image shall be painted
  Throws:
    `IFException` - if an error occurs while handling this event

### clipRect

    public void clipRect(java.awt.Rectangle rect)
                  throws IFException

  Restricts the current clipping region with the given rectangle.

  Specified by:
    `clipRect` in interface `IFPainter`
  Parameters:
    `rect` - the rectangle's coordinates and extent
  Throws:
    `IFException` - if an error occurs while handling this event

### clipBackground

    public void clipBackground(java.awt.Rectangle rect,
                               BorderProps bpsBefore,
                               BorderProps bpsAfter,
                               BorderProps bpsStart,
                               BorderProps bpsEnd)
                        throws IFException

  Restricts the current clipping region to the inner border.

  Specified by:
    `clipBackground` in interface `IFPainter`
  Parameters:
    `rect` - the rectangle's coordinates and extent
    `bpsBefore` - the border segment on the before-side (top)
    `bpsAfter` - the border segment on the after-side (bottom)
    `bpsStart` - the border segment on the start-side (left)
    `bpsEnd` - the border segment on the end-side (right)
  Throws:
    `IFException` - if an error occurs while handling this event

### fillRect

    public void fillRect(java.awt.Rectangle rect,
                         java.awt.Paint fill)
                  throws IFException

  Fills a rectangular area.

  Specified by:
    `fillRect` in interface `IFPainter`
  Parameters:
    `rect` - the rectangle's coordinates and extent
    `fill` - the fill paint
  Throws:
    `IFException` - if an error occurs while handling this event

### drawBorderRect

    public void drawBorderRect(java.awt.Rectangle rect,
                               BorderProps top,
                               BorderProps bottom,
                               BorderProps left,
                               BorderProps right,
                               java.awt.Color innerBackgroundColor)
                        throws IFException

  Draws a border rectangle. The border segments are specified through `BorderProps` instances.

  Specified by:
    `drawBorderRect` in interface `IFPainter`
  Parameters:
    `rect` - the rectangle's coordinates and extent
    `top` - the border segment on the top edge
    `bottom` - the border segment on the bottom edge
    `left` - the border segment on the left edge
    `right` - the border segment on the right edge
    `innerBackgroundColor` - the color of the inner background
  Throws:
    `IFException` - if an error occurs while handling this event

### drawLine

    public void drawLine(java.awt.Point start,
                         java.awt.Point end,
                         int width,
                         java.awt.Color color,
                         RuleStyle style)
                  throws IFException

  Draws a line. NOTE: Currently, only horizontal lines are implemented!

  Specified by:
    `drawLine` in interface `IFPainter`
  Parameters:
    `start` - the start point of the line
    `end` - the end point of the line
    `width` - the line width
    `color` - the line color
    `style` - the line style (using the Constants.EN_* constants for the rule-style property)
  Throws:
    `IFException` - if an error occurs while handling this event

### drawText

    public void drawText(int x,
                         int y,
                         int letterSpacing,
                         int wordSpacing,
                         int[][] dp,
                         java.lang.String text)
                  throws IFException

  Draws text. The initial coordinates (x and y) point to the starting point at the normal baseline of the font. The parameters letterSpacing, wordSpacing and the array dx are optional and can be used to influence character positioning (for example, for kerning).

  Specified by:
    `drawText` in interface `IFPainter`
  Parameters:
    `x` - X-coordinate of the starting point of the text
    `y` - Y-coordinate of the starting point of the text
    `letterSpacing` - additional spacing between characters (may be 0)
    `wordSpacing` - additional spacing between words (may be 0)
    `dp` - an array of 4-tuples, expressing [X,Y] placment adjustments and [X,Y] advancement adjustments, in that order (may be null); if not null, then adjustments.length must be the same as text.length()
    `text` - the text
  Throws:
    `IFException` - if an error occurs while handling this event

### setFont

    public void setFont(java.lang.String family,
                        java.lang.String style,
                        java.lang.Integer weight,
                        java.lang.String variant,
                        java.lang.Integer size,
                        java.awt.Color color)
                 throws IFException

  Updates the current font.

  Specified by:
    `setFont` in interface `IFPainter`
  Parameters:
    `family` - the font family (or null if there's no change)
    `style` - the font style (or null if there's no change)
    `weight` - the font weight (or null if there's no change)
    `variant` - the font variant (or null if there's no change)
    `size` - the font size (or null if there's no change)
    `color` - the text color (or null if there's no change)
  Throws:
    `IFException` - if an error occurs while handling this event

### handleExtensionObject

    public void handleExtensionObject(java.lang.Object extension)
                               throws IFException

  Handles an extension object. This can be a DOM document or any arbitrary object. If an implementation doesn't know how to handle a particular extension it is simply ignored.

  Specified by:
    `handleExtensionObject` in interface `IFDocumentHandler`
  Parameters:
    `extension` - the extension object
  Throws:
    `IFException` - if an error occurs while handling this event

### createRenderingContext

    protected RenderingContext createRenderingContext()
                                               throws java.lang.IllegalStateException

  Returns:
    a new rendering context
  Throws:
    `java.lang.IllegalStateException` - unless overridden

### renderNamedDestination

    public void renderNamedDestination(NamedDestination destination)
                                throws IFException

  Renders a named destination.

  Specified by:
    `renderNamedDestination` in interface `IFDocumentNavigationHandler`
  Parameters:
    `destination` - the named destination
  Throws:
    `IFException` - if an error occurs while handling this event

### renderBookmarkTree

    public void renderBookmarkTree(BookmarkTree tree)
                            throws IFException

  Render the bookmark tree.

  Specified by:
    `renderBookmarkTree` in interface `IFDocumentNavigationHandler`
  Parameters:
    `tree` - the bookmark tree
  Throws:
    `IFException` - if an error occurs while handling this event

### renderLink

    public void renderLink(Link link)
                    throws IFException

  Specified by:
    `renderLink` in interface `IFDocumentNavigationHandler`
  Parameters:
    `link` - a link
  Throws:
    `IFException` - of not caught

### addResolvedAction

    public void addResolvedAction(AbstractAction action)
                           throws IFException

  Specified by:
    `addResolvedAction` in interface `IFDocumentNavigationHandler`
  Parameters:
    `action` - an action
  Throws:
    `IFException` - of not caught

### isBackgroundRequired

    public boolean isBackgroundRequired(BorderProps bpsTop,
                                        BorderProps bpsBottom,
                                        BorderProps bpsLeft,
                                        BorderProps bpsRight)

  TODO Painter-specific rounded borders logic required background drawing to be made optional. A future refactoring of the rounded borders code should aim to make the need for this abstraction obsolete

  Specified by:
    `isBackgroundRequired` in interface `IFPainter`
  Parameters:
    `bpsTop` - the before border
    `bpsBottom` - the after border
    `bpsLeft` - the start border
    `bpsRight` - the end border
  Returns:
    true if and only if background drawing is required

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