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org.eclipse.swt.custom
Class DefaultLineStyler  

java.lang.Object
  org.eclipse.swt.custom.DefaultLineStyler

All Implemented Interfaces:

java.util.EventListener, LineBackgroundListener, LineStyleListener, org.eclipse.swt.internal.SWTEventListener

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class DefaultLineStyler

extends java.lang.Object

implements LineStyleListener, LineBackgroundListener

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Field Summary
(package private)  StyledTextContent	content
(package private)  org.eclipse.swt.graphics.Color[]	lineBackgrounds
(package private)  int	lineCount
(package private)  int	lineExpandExp
(package private)  int	styleCount
(package private)  int	styleExpandExp
(package private)  StyleRange[]	styles

 

Constructor Summary

DefaultLineStyler(StyledTextContent content)           Creates a new default line styler.

 

Method Summary
(package private)  void	clearStyle(StyleRange clearStyle)           Removes style information that is defined for the range of text in clearStyle.
(package private)  void	deleteStyle(int index)           Deletes the style at index.
(package private)  void	deleteStyles(int index, int count)           Delete count styles starting at index.
(package private)  void	expandLinesBy(int numLines)           Increases the linebackgrounds array to accomodate new line background information.
(package private)  org.eclipse.swt.graphics.Color	getLineBackground(int index)           Returns the background color of a line.
(package private)  org.eclipse.swt.graphics.Point	getOverlappingStyles(int start, int length)           Returns the indexes of the styles that overlap the given range.
(package private)  StyleRange	getStyleRangeAtOffset(int offset)           Returns the style for the character at offset.
(package private)  StyleRange[]	getStyleRanges()           Returns the styles that are defined.
(package private)  StyleRange[]	getStyleRangesFor(int offset, int length)           Returns the styles for the given range.
(package private)  boolean	insertMergeStyle(StyleRange style, int index)           Inserts a style, merging it with adjacent styles if possible.
(package private)  void	insertStyle(StyleRange style, int index)           Inserts a style at the given location.
(package private)  void	insertStyles(StyleRange[] insertStyles, int index)           Insert the styles at the given location.
void	lineGetBackground(LineBackgroundEvent event)           Handles the get line background color callback.
void	lineGetStyle(LineStyleEvent event)           Handles the get line style information callback.
(package private)  void	linesChanging(int start, int delta)
(package private)  boolean	mergeStyleAfter(StyleRange style, int index)           Merges the style with the style after it if possible.
(package private)  boolean	mergeStyleBefore(StyleRange style, int index)           Merges the style with the style before it if possible.
(package private)  void	release()
(package private)  void	replaceStyleRanges(int start, int length, StyleRange[] ranges)           Replace the styles for the given range.
(package private)  int	searchForStyle(int start, int end)           Searches for the first style in the start - end range.
(package private)  void	setLineBackground(int startLine, int count, org.eclipse.swt.graphics.Color background)           Updates the line background colors to reflect a new color.
(package private)  void	setStyleRange(StyleRange newStyle)           Update the styles to reflect the new style.
(package private)  void	setStyleRanges(StyleRange[] styles)           Sets the array of styles and discards old styles.
(package private)  void	textChanging(int start, int delta)
void	textChanging(TextChangingEvent event)           Updates the style ranges and line backgrounds to reflect a pending text change.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

content

StyledTextContent content

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styles

StyleRange[] styles

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styleCount

int styleCount

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styleExpandExp

int styleExpandExp

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lineExpandExp

int lineExpandExp

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lineCount

int lineCount

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lineBackgrounds

org.eclipse.swt.graphics.Color[] lineBackgrounds

Constructor Detail

DefaultLineStyler

public DefaultLineStyler(StyledTextContent content)

Creates a new default line styler.

Method Detail

insertStyle

void insertStyle(StyleRange style,
                 int index)

Inserts a style at the given location.

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insertStyles

void insertStyles(StyleRange[] insertStyles,
                  int index)

Insert the styles at the given location.

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insertMergeStyle

boolean insertMergeStyle(StyleRange style,
                         int index)

Inserts a style, merging it with adjacent styles if possible.

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mergeStyleBefore

boolean mergeStyleBefore(StyleRange style,
                         int index)

Merges the style with the style before it if possible.

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mergeStyleAfter

boolean mergeStyleAfter(StyleRange style,
                        int index)

Merges the style with the style after it if possible.

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clearStyle

void clearStyle(StyleRange clearStyle)

Removes style information that is defined for the range of text in clearStyle.

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expandLinesBy

void expandLinesBy(int numLines)

Increases the linebackgrounds array to accomodate new line background information.

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deleteStyle

void deleteStyle(int index)

Deletes the style at index.

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deleteStyles

void deleteStyles(int index,
                  int count)

Delete count styles starting at index.

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getStyleRanges

StyleRange[] getStyleRanges()

Returns the styles that are defined.

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lineGetBackground

public void lineGetBackground(LineBackgroundEvent event)

Handles the get line background color callback.

Specified by:

lineGetBackground in interface LineBackgroundListener

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lineGetStyle

public void lineGetStyle(LineStyleEvent event)

Handles the get line style information callback.

Specified by:

lineGetStyle in interface LineStyleListener

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searchForStyle

int searchForStyle(int start,
                   int end)

Searches for the first style in the start - end range.

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setLineBackground

void setLineBackground(int startLine,
                       int count,
                       org.eclipse.swt.graphics.Color background)

Updates the line background colors to reflect a new color. Called by StyledText.

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setStyleRange

void setStyleRange(StyleRange newStyle)

Update the styles to reflect the new style. newStyle will replace any old style for the range. When this method is called, the DefaultLineStyler may merge the new style with an existing style (if possible). Called by StyledText when a style is added. Called by StyledText.

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replaceStyleRanges

void replaceStyleRanges(int start,
                        int length,
                        StyleRange[] ranges)

Replace the styles for the given range.

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setStyleRanges

void setStyleRanges(StyleRange[] styles)

Sets the array of styles and discards old styles. Called by StyledText.

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textChanging

public void textChanging(TextChangingEvent event)

Updates the style ranges and line backgrounds to reflect a pending text change. Called by StyledText when a TextChangingEvent is received.

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linesChanging

void linesChanging(int start,
                   int delta)

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textChanging

void textChanging(int start,
                  int delta)

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getOverlappingStyles

org.eclipse.swt.graphics.Point getOverlappingStyles(int start,
                                                    int length)

Returns the indexes of the styles that overlap the given range. Styles that partially or fully overlap the range will be returned.

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getLineBackground

org.eclipse.swt.graphics.Color getLineBackground(int index)

Returns the background color of a line. Called by StyledText. It is safe to return the existing Color object since the colors are set and managed by the client.

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getStyleRangeAtOffset

StyleRange getStyleRangeAtOffset(int offset)

Returns the style for the character at offset. Called by StyledText. Returns a new style. Does not return the existing style.

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getStyleRangesFor

StyleRange[] getStyleRangesFor(int offset,
                               int length)

Returns the styles for the given range. Returns the existing styles, so be careful not to modify the return value. Styles are not cloned in order to make this method as efficient as possible.

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release

void release()

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Home >> All >> org >> eclipse >> swt >> [ custom overview ]	PREV CLASS  NEXT CLASS
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