org.eclipse.jface.text
Class ProjectionPositionUpdater

java.lang.Object
  org.eclipse.jface.text.DefaultPositionUpdater
      org.eclipse.jface.text.ProjectionPositionUpdater

All Implemented Interfaces:

IPositionUpdater

public class ProjectionPositionUpdater

extends DefaultPositionUpdater

The position updater used to adapt the positions corresponding to the fragments of projection documents. The startegy of this updater differs from the DefaultPositionUpdater. If an insertion happens at a start offset of a range corresponding to a fragment, the range is extended rather than shifted. Also, if text is added right behind the end of such a range, the range is extended rather than kept stable.

This class is for internal use only.

Since:

2.1

Field Summary

Fields inherited from class org.eclipse.jface.text.DefaultPositionUpdater

fDocument, fLength, fOffset, fOriginalPosition, fPosition, fReplaceLength

Constructor Summary

protected

ProjectionPositionUpdater(String category) Creates the position updater for the given category.

Method Summary

protected void	adaptToInsert() If an insertion happens at a start offset of a range corresponding to a fragment, the range is extended rather than shifted.
protected boolean	notDeleted() Projection document ranges cannot be deleted other then by calling ProjectionDocumentManager#removeFragment.

Methods inherited from class org.eclipse.jface.text.DefaultPositionUpdater

adaptToRemove, adaptToReplace, getCategory, update

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectionPositionUpdater

protected ProjectionPositionUpdater(String category)

Creates the position updater for the given category.

Parameters:

category - the category used to manage the positions representing the ranges corresponding to fragments

Method Detail

notDeleted

protected boolean notDeleted()

Projection document ranges cannot be deleted other then by calling ProjectionDocumentManager#removeFragment.

Overrides:

notDeleted in class DefaultPositionUpdater

Returns:

true

adaptToInsert

protected void adaptToInsert()

If an insertion happens at a start offset of a range corresponding to a fragment, the range is extended rather than shifted. Also, if text is added right behind the end of such a range, the range is extended rather than kept stable.

Overrides:

adaptToInsert in class DefaultPositionUpdater