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Eclipse Platform
Release 3.0

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org.eclipse.jface.text
Interface ITextViewerExtension5

All Superinterfaces:

ITextViewerExtension3

All Known Implementing Classes:

ProjectionViewer

public interface ITextViewerExtension5

extends ITextViewerExtension3

Extension interface for ITextViewer. Defines a conceptual replacement of the original visible region concept. This interface replaces ITextViewerExtension3.

Introduces the explicit concept of model and widget coordinates. For example, a selection returned by the text viewer's control is a widget selection. A widget selection always maps to a certain range of the viewer's document. This range is considered the model selection.

All model ranges that have a corresponding widget ranges are considered "exposed model ranges". The viewer can be requested to expose a given model range. Thus, a visible region is a particular degeneration of exposed model ranges.

This interface allows implementers to follow a sophisticated presentation model in which the visible presentation is a complex projection of the viewer's input document.

Since:

3.0

Method Summary

boolean	exposeModelRange(IRegion modelRange) Exposes the given model range.
IRegion[]	getCoveredModelRanges(IRegion modelRange) Returns the maximal subranges of the given model range thus that there is no offset inside a subrange for which there is no image offset.
IRegion	getModelCoverage() Returns the minimal region of the viewer's input document that completely comprises everything that is visible in the viewer's widget or null if there is no such region.
int	modelLine2WidgetLine(int modelLine) Returns the widget line that corresponds to the given line of the viewer's input document or -1 if there is no such line.
int	modelOffset2WidgetOffset(int modelOffset) Returns the widget offset that corresponds to the given offset in the viewer's input document or -1 if there is no such offset
IRegion	modelRange2WidgetRange(IRegion modelRange) Returns the minimal region of the viewer's widget that completely comprises the given region of the viewer's input document or null if there is no such region.
int	widgetLine2ModelLine(int widgetLine) Returns the line of the viewer's input document that corresponds to the given widget line or -1 if there is no such line.
int	widgetLineOfWidgetOffset(int widgetOffset) Returns the widget line of the given widget offset.
int	widgetOffset2ModelOffset(int widgetOffset) Returns the offset of the viewer's input document that corresponds to the given widget offset or -1 if there is no such offset
IRegion	widgetRange2ModelRange(IRegion widgetRange) Returns the minimal region of the viewer's input document that completely comprises the given widget region or null if there is no such region.

Methods inherited from interface org.eclipse.jface.text.ITextViewerExtension3

widgetlLine2ModelLine

Method Detail

getModelCoverage

public IRegion getModelCoverage()

Returns the minimal region of the viewer's input document that completely comprises everything that is visible in the viewer's widget or null if there is no such region.

Specified by:

getModelCoverage in interface ITextViewerExtension3

Returns:

the minimal region of the viewer's document comprising the contents of the viewer's widget or null

modelLine2WidgetLine

public int modelLine2WidgetLine(int modelLine)

Returns the widget line that corresponds to the given line of the viewer's input document or -1 if there is no such line.

Specified by:

modelLine2WidgetLine in interface ITextViewerExtension3

Parameters:

modelLine - the line of the viewer's document

Returns:

the corresponding widget line or -1

modelOffset2WidgetOffset

public int modelOffset2WidgetOffset(int modelOffset)

Returns the widget offset that corresponds to the given offset in the viewer's input document or -1 if there is no such offset

Specified by:

modelOffset2WidgetOffset in interface ITextViewerExtension3

Parameters:

modelOffset - the offset in the viewer's document

Returns:

the corresponding widget offset or -1

modelRange2WidgetRange

public IRegion modelRange2WidgetRange(IRegion modelRange)

Returns the minimal region of the viewer's widget that completely comprises the given region of the viewer's input document or null if there is no such region.

Specified by:

modelRange2WidgetRange in interface ITextViewerExtension3

Parameters:

modelRange - the region of the viewer's document

Returns:

the minimal region of the widget comprising modelRange or null

widgetOffset2ModelOffset

public int widgetOffset2ModelOffset(int widgetOffset)

Returns the offset of the viewer's input document that corresponds to the given widget offset or -1 if there is no such offset

Specified by:

widgetOffset2ModelOffset in interface ITextViewerExtension3

Parameters:

widgetOffset - the widget offset

Returns:

the corresponding offset in the viewer's document or -1

widgetRange2ModelRange

public IRegion widgetRange2ModelRange(IRegion widgetRange)

Returns the minimal region of the viewer's input document that completely comprises the given widget region or null if there is no such region.

Specified by:

widgetRange2ModelRange in interface ITextViewerExtension3

Parameters:

widgetRange - the widget region

Returns:

the minimal region of the viewer's document comprising widgetlRange or null

widgetLine2ModelLine

public int widgetLine2ModelLine(int widgetLine)

Returns the line of the viewer's input document that corresponds to the given widget line or -1 if there is no such line.

Parameters:

widgetLine - the widget line

Returns:

the corresponding line of the viewer's document or -1

widgetLineOfWidgetOffset

public int widgetLineOfWidgetOffset(int widgetOffset)

Returns the widget line of the given widget offset.

Specified by:

widgetLineOfWidgetOffset in interface ITextViewerExtension3

Parameters:

widgetOffset - the widget offset

Returns:

the widget line of the widget offset

getCoveredModelRanges

public IRegion[] getCoveredModelRanges(IRegion modelRange)

Returns the maximal subranges of the given model range thus that there is no offset inside a subrange for which there is no image offset.

Parameters:

modelRange - the model range

Returns:

the list of subranges

exposeModelRange

public boolean exposeModelRange(IRegion modelRange)

Exposes the given model range. Returns whether this call caused a change of the set of exposed model ranges.

Parameters:

modelRange - the model range to be exposed

Returns:

true if the set of exposed model ranges changed, false otherwise