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oracle.ide.ceditor
Class NodeUpdater

java.lang.Object
oracle.ide.ceditor.NodeUpdater

All Implemented Interfaces:

java.awt.event.ActionListener, java.util.EventListener, TextBufferListener

public final class NodeUpdater

extends java.lang.Object

implements java.awt.event.ActionListener, TextBufferListener

The NodeUpdater class is a class which takes care of the delayed notification in the idle time after a text buffer change occurs. This updater is responsible for tracking the text buffer for changes, and sending a delayed notification.

This is paired with NodeObserver to work correctly.

Field Summary

Fields inherited from interface oracle.javatools.buffer.TextBufferListener

EOL_TYPE_ATTRIBUTE, MODIFIED_ATTRIBUTE, READ_ONLY_ATTRIBUTE, RELOAD_END_ATTRIBUTE, RELOAD_START_ATTRIBUTE

Method Summary

void	actionPerformed(java.awt.event.ActionEvent event) This is invoked when an action is performed.
void	attributeUpdate(TextBuffer buffer, int attribute) Provides notification regarding a change to one of the buffer attributes.
protected void	finalize() The finalizer is used to ensure that the observer will close at some point.
static NodeUpdater	getUpdater(Subject nodeSubject, TextBuffer textBuffer) Fetches an updater for the given node - all cached updaters are stored on the list as WeakReferences so that they can be GC'd correcty.
void	insertUpdate(TextBuffer buffer, int offset, int count, char[] insertedData) Provides notification about an insertion into the TextBuffer.
void	removeUpdate(TextBuffer buffer, int offset, int count, char[] removedData) Provides notification about a removal from the TextBuffer.

Methods inherited from class java.lang.Object

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

Method Detail

getUpdater

public static NodeUpdater getUpdater(Subject nodeSubject,
                                     TextBuffer textBuffer)

Fetches an updater for the given node - all cached updaters are stored on the list as WeakReferences so that they can be GC'd correcty.

finalize

protected void finalize()
                 throws java.lang.Throwable

The finalizer is used to ensure that the observer will close at some point.

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable

actionPerformed

public void actionPerformed(java.awt.event.ActionEvent event)

This is invoked when an action is performed. In this case, it should only be a Timer event.

Specified by:

actionPerformed in interface java.awt.event.ActionListener

Parameters:

event - the action event

insertUpdate

public void insertUpdate(TextBuffer buffer,
                         int offset,
                         int count,
                         char[] insertedData)

Provides notification about an insertion into the TextBuffer.

Specified by:

insertUpdate in interface TextBufferListener

Parameters:

buffer -

offset - the offset where the insert took place

count - the number of characters inserted (insertedData.length)

insertedData - the contents of the insertion

removeUpdate

public void removeUpdate(TextBuffer buffer,
                         int offset,
                         int count,
                         char[] removedData)

Provides notification about a removal from the TextBuffer.

Specified by:

removeUpdate in interface TextBufferListener

Parameters:

buffer -

offset - the offset where the removal took place

count - the number of characters removed (removedData.length)

removedData - the contents of the removal

attributeUpdate

public void attributeUpdate(TextBuffer buffer,
                            int attribute)

Provides notification regarding a change to one of the buffer attributes. The possible attributes are defined in this interface.

Specified by:

attributeUpdate in interface TextBufferListener

Parameters:

buffer -

attribute - the attribute that changed

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