org.eclipse.fx.text.ui.rules

Class DefaultDamagerRepairer

java.lang.Object

org.eclipse.fx.text.ui.rules.DefaultDamagerRepairer

All Implemented Interfaces:

IPresentationDamager, IPresentationRepairer

public class DefaultDamagerRepairer
extends java.lang.Object
implements IPresentationDamager, IPresentationRepairer

A standard implementation of a syntax driven presentation damager and presentation repairer. It uses a token scanner to scan the document and to determine its damage and new text presentation. The tokens returned by the scanner are supposed to return text attributes as their data.

Since:

2.0

See Also:

ITokenScanner

Field Summary

Fields

Modifier and Type	Field and Description
protected TextAttribute	fDefaultTextAttribute The default text attribute if non is returned as data by the current token
protected IDocument	fDocument The document this object works on
protected ITokenScanner	fScanner The scanner it uses

Constructor Summary

Constructors

Constructor and Description
DefaultDamagerRepairer(ITokenScanner scanner) Creates a damager/repairer that uses the given scanner.
DefaultDamagerRepairer(ITokenScanner scanner, TextAttribute defaultTextAttribute) Deprecated. use DefaultDamagerRepairer(ITokenScanner) instead

Method Summary

Modifier and Type	Method and Description
protected void	addRange(TextPresentation presentation, int offset, int length, TextAttribute attr) Adds style information to the given text presentation.
void	createPresentation(TextPresentation presentation, ITypedRegion region) Fills the given presentation with the style ranges which when applied to the presentation reconciler's text viewer repair the presentation damage described by the given region.
protected int	endOfLineOf(int offset) Returns the end offset of the line that contains the specified offset or if the offset is inside a line delimiter, the end offset of the next line.
IRegion	getDamageRegion(ITypedRegion partition, DocumentEvent e, boolean documentPartitioningChanged) Returns the damage in the document's presentation caused by the given document change.
protected TextAttribute	getTokenTextAttribute(IToken token) Returns a text attribute encoded in the given token.
void	setDocument(IDocument document) Tells the presentation damager on which document it will work.

Methods inherited from class java.lang.Object

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

Field Detail

fDocument

protected IDocument fDocument

The document this object works on

fScanner

protected ITokenScanner fScanner

The scanner it uses

fDefaultTextAttribute

protected TextAttribute fDefaultTextAttribute

The default text attribute if non is returned as data by the current token

Constructor Detail

DefaultDamagerRepairer

public DefaultDamagerRepairer(ITokenScanner scanner,
                              TextAttribute defaultTextAttribute)

Deprecated. use DefaultDamagerRepairer(ITokenScanner) instead

Creates a damager/repairer that uses the given scanner and returns the given default text attribute if the current token does not carry a text attribute.

Parameters:

scanner - the token scanner to be used

defaultTextAttribute - the text attribute to be returned if non is specified by the current token, may not be null

DefaultDamagerRepairer

public DefaultDamagerRepairer(ITokenScanner scanner)

Creates a damager/repairer that uses the given scanner. The scanner may not be null and is assumed to return only token that carry text attributes.

Parameters:

scanner - the token scanner to be used, may not be null

Method Detail

setDocument

public void setDocument(IDocument document)

Description copied from interface: IPresentationDamager

Tells the presentation damager on which document it will work.

Specified by:

setDocument in interface IPresentationDamager

Specified by:

setDocument in interface IPresentationRepairer

Parameters:

document - the damager's working document

endOfLineOf

protected int endOfLineOf(int offset)
                   throws BadLocationException

Returns the end offset of the line that contains the specified offset or if the offset is inside a line delimiter, the end offset of the next line.

Parameters:

offset - the offset whose line end offset must be computed

Returns:

the line end offset for the given offset

Throws:

BadLocationException - if offset is invalid in the current document

getDamageRegion

public IRegion getDamageRegion(ITypedRegion partition,
                               DocumentEvent e,
                               boolean documentPartitioningChanged)

Returns the damage in the document's presentation caused by the given document change. The damage is restricted to the specified partition for which the presentation damager is responsible. The damage may also depend on whether the document change also caused changes of the document's partitioning.

This implementation damages entire lines unless clipped by the given partition.

Specified by:

getDamageRegion in interface IPresentationDamager

Parameters:

partition - the partition inside which the damage must be determined

e - the event describing the change whose damage must be determined

documentPartitioningChanged - indicates whether the given change changed the document's partitioning

Returns:

the full lines containing the document changes described by the document event, clipped by the given partition. If there was a partitioning change then the whole partition is returned.

createPresentation

public void createPresentation(TextPresentation presentation,
                               ITypedRegion region)

Description copied from interface: IPresentationRepairer

Fills the given presentation with the style ranges which when applied to the presentation reconciler's text viewer repair the presentation damage described by the given region.

Specified by:

createPresentation in interface IPresentationRepairer

Parameters:

presentation - the text presentation to be filled by this repairer

region - the damage to be repaired

getTokenTextAttribute

protected TextAttribute getTokenTextAttribute(IToken token)

Returns a text attribute encoded in the given token. If the token's data is not null and a text attribute it is assumed that it is the encoded text attribute. It returns the default text attribute if there is no encoded text attribute found.

Parameters:

token - the token whose text attribute is to be determined

Returns:

the token's text attribute

addRange

protected void addRange(TextPresentation presentation,
                        int offset,
                        int length,
                        TextAttribute attr)

Adds style information to the given text presentation.

Parameters:

presentation - the text presentation to be extended

offset - the offset of the range to be styled

length - the length of the range to be styled

attr - the attribute describing the style of the range to be styled