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Eclipse Platform
Release 3.0

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org.eclipse.jface.text
Interface ITextViewerExtension2

All Known Implementing Classes:

TextViewer

public interface ITextViewerExtension2

Extension interface for ITextViewer.

It provides

• text presentation invalidation enhancements
• text hover management enhancements
• a replacement for auto indent strategies
• support for custom painters

It extends the means for text presentation invalidation by allowing a specific region of the presentation to get invalidated. It replaces ITextViewer.setTextHover(ITextHover, String) with a new method that allows to specify state masks for a better control of the hover behavior.

An IAutoEditStrategyis a generalization of the original IAutoIndentStrategy. Auto edit strategies can be arranged in a list that is executed like a pipeline when the viewer content is changed.

A IPainteris creating and managing visual decorations on the viewer's text widget. Viewer's can have an open number of painters. Painters are informed about changes to the viewer content and state and can take the necessary action in responds to the notification.

Since:

2.1

Field Summary

static int

DEFAULT_HOVER_STATE_MASK The state mask of the default hover (value 0xff).

Method Summary

void	addPainter(IPainter painter) Adds the given painter to this viewer.
ITextHover	getCurrentTextHover() Returns the currently displayed text hover if any, null otherwise.
Point	getHoverEventLocation() Returns the location at which the most recent mouse hover event has occurred.
void	invalidateTextPresentation(int offset, int length) Invalidates the viewer's text presentation for the given range.
void	prependAutoEditStrategy(IAutoEditStrategy strategy, String contentType) Prepends the given auto edit strategy to the existing list of strategies for the specified content type.
void	removeAutoEditStrategy(IAutoEditStrategy strategy, String contentType) Removes the first occurrence of the given auto edit strategy in the list of strategies registered under the specified content type.
void	removePainter(IPainter painter) Removes the given painter from this viewer.
void	removeTextHovers(String contentType) Removes all text hovers for the given content type independent from their state mask.
void	setTextHover(ITextHover textViewerHover, String contentType, int stateMask) Sets this viewer's text hover for the given content type and the given state mask.

Field Detail

DEFAULT_HOVER_STATE_MASK

public static final int DEFAULT_HOVER_STATE_MASK

The state mask of the default hover (value 0xff).

See Also:

Constant Field Values

Method Detail

invalidateTextPresentation

public void invalidateTextPresentation(int offset,
                                       int length)

Invalidates the viewer's text presentation for the given range.

Parameters:

offset - the offset of the first character to be redrawn

length - the length of the range to be redrawn

setTextHover

public void setTextHover(ITextHover textViewerHover,
                         String contentType,
                         int stateMask)

Sets this viewer's text hover for the given content type and the given state mask. If the given text hover is null, any hover installed for the given content type and state mask is removed.

Parameters:

textViewerHover - the new hover or null

contentType - the type for which the hover is to be registered or unregistered

stateMask - the SWT event state mask; DEFAULT_HOVER_STATE_MASK indicates that the hover is installed as the default hover.

removeTextHovers

public void removeTextHovers(String contentType)

Removes all text hovers for the given content type independent from their state mask.

Note: To remove a hover for a given content type and state mask use setTextHover(ITextHover, String, int) with null as parameter for the text hover.

Parameters:

contentType - the type for which all text hovers are to be unregistered

getCurrentTextHover

public ITextHover getCurrentTextHover()

Returns the currently displayed text hover if any, null otherwise.

Returns:

the currently displayed text hover or null

getHoverEventLocation

public Point getHoverEventLocation()

Returns the location at which the most recent mouse hover event has occurred.

Returns:

the location of the most recent mouse hover event

prependAutoEditStrategy

public void prependAutoEditStrategy(IAutoEditStrategy strategy,
                                    String contentType)

Prepends the given auto edit strategy to the existing list of strategies for the specified content type. The strategies are called in the order in which they appear in the list of strategies.

Parameters:

strategy - the auto edit strategy

contentType - the content type

removeAutoEditStrategy

public void removeAutoEditStrategy(IAutoEditStrategy strategy,
                                   String contentType)

Removes the first occurrence of the given auto edit strategy in the list of strategies registered under the specified content type.

Parameters:

strategy - the auto edit strategy

contentType - the content type

addPainter

public void addPainter(IPainter painter)

Adds the given painter to this viewer.

Parameters:

painter - the painter to be added

removePainter

public void removePainter(IPainter painter)

Removes the given painter from this viewer. If the painter has not been added to this viewer, this call is without effect.

Parameters:

painter - the painter to be removed