org.eclipse.jface.text.TextAttribute#getStyle ( )源码实例Demo

private TextAttribute merge(TextAttribute first, TextAttribute second) {
	if (first == null)
		return second;
	if (second == null)
		return first;
	int style = first.getStyle() | second.getStyle();
	Color fgColor = second.getForeground();
	if (fgColor == null)
		fgColor = first.getForeground();
	Color bgColor = second.getBackground();
	if (bgColor == null)
		bgColor = first.getBackground();
	Font font = second.getFont();
	if (font == null)
		font = first.getFont();
	return new TextAttribute(fgColor, bgColor, style, font);
}
 

public List<StyleRange> getRanges(String expression) {
	final List<StyleRange> ranges = Lists.newArrayList();
	DocumentEvent event = new DocumentEvent();
	event.fDocument = new DummyDocument(expression);
	DocumentTokenSource tokenSource = tokenSourceProvider.get();
	tokenSource.updateStructure(event);
	Iterator<ILexerTokenRegion> iterator = tokenSource.getTokenInfos().iterator();
	while (iterator.hasNext()) {
		ILexerTokenRegion next = iterator.next();
		TextAttribute attribute = attributeProvider.getAttribute(tokenTypeMapper.getId(next.getLexerTokenType()));
		StyleRange range = new StyleRange(next.getOffset(), next.getLength(), attribute.getForeground(),
				attribute.getBackground());
		range.font = attribute.getFont();
		range.fontStyle = attribute.getStyle();
		ranges.add(range);
	}
	return merge(ranges);
}
 

/**
 * Adds style information to the given text presentation.
 *
 * @param presentation the text presentation to be extended
 * @param offset the offset of the range to be styled
 * @param length the length of the range to be styled
 * @param attr the attribute describing the style of the range to be styled
 * @param wholeLine the boolean switch to declare that the whole line should be colored
 */
private void addRange(TextPresentation presentation, int offset, int length, TextAttribute attr, boolean wholeLine) {
    if (attr != null) {
        int style= attr.getStyle();
        int fontStyle= style & (SWT.ITALIC | SWT.BOLD | SWT.NORMAL);
        if(wholeLine) {
            try {
                int line = document.getLineOfOffset(offset);
                int start = document.getLineOffset(line);
                length = document.getLineLength(line);
                offset = start;
            } catch (BadLocationException e) {
            }
        }
        StyleRange styleRange = new StyleRange(offset,length,attr.getForeground(),attr.getBackground(),fontStyle);
        styleRange.strikeout = (style & TextAttribute.STRIKETHROUGH) != 0;
        styleRange.underline = (style & TextAttribute.UNDERLINE) != 0;
        presentation.addStyleRange(styleRange);
    }
}
 

/**
 * applyTheme
 * 
 * @param name
 * @param stream
 * @param defaultColor
 * @return
 */
private void applyTheme(String name, IOConsoleOutputStream stream, Color defaultColor)
{
	Theme theme = ThemePlugin.getDefault().getThemeManager().getCurrentTheme();
	Color color = defaultColor;
	int style = SWT.NONE;

	// grab theme values, if they exist
	if (theme.hasEntry(name))
	{
		TextAttribute attr = theme.getTextAttribute(name);

		color = theme.getForeground(name);
		style = attr.getStyle();
	}

	// apply new values
	stream.setColor(color);
	stream.setFontStyle(style);
}
 

private void adaptToStyleChange(Token token, PropertyChangeEvent event, int styleAttribute) {
	boolean eventValue= false;
	Object value= event.getNewValue();
	if (value instanceof Boolean)
		eventValue= ((Boolean) value).booleanValue();
	else if (IPreferenceStore.TRUE.equals(value))
		eventValue= true;

	Object data= token.getData();
	if (data instanceof TextAttribute) {
		TextAttribute oldAttr= (TextAttribute) data;
		boolean activeValue= (oldAttr.getStyle() & styleAttribute) == styleAttribute;
		if (activeValue != eventValue)
			token.setData(new TextAttribute(oldAttr.getForeground(), oldAttr.getBackground(), eventValue ? oldAttr.getStyle() | styleAttribute : oldAttr.getStyle() & ~styleAttribute));
	}
}
 

private void adaptToStyleChange(Token token, PropertyChangeEvent event, int styleAttribute) {
	boolean eventValue = false;
	Object value = event.getNewValue();
	if (value instanceof Boolean)
		eventValue = ((Boolean) value).booleanValue();
	else if (IPreferenceStore.TRUE.equals(value))
		eventValue = true;

	Object data = token.getData();
	if (data instanceof TextAttribute) {
		TextAttribute oldAttr = (TextAttribute) data;
		boolean activeValue = (oldAttr.getStyle() & styleAttribute) == styleAttribute;
		if (activeValue != eventValue)
			token.setData(new TextAttribute(oldAttr.getForeground(), oldAttr.getBackground(),
					eventValue ? oldAttr.getStyle() | styleAttribute : oldAttr.getStyle() & ~styleAttribute));
	}
}
 

/**
 * Adds style information to the given text presentation.
 * 
 * @param presentation
 *            the text presentation to be extended
 * @param offset
 *            the offset of the range to be styled
 * @param length
 *            the length of the range to be styled
 * @param attr
 *            the attribute describing the style of the range to be styled
 */
protected void addRange( TextPresentation presentation, int offset,
		int length, TextAttribute attr )
{
	if ( attr != null )
	{
		int style= attr.getStyle();
		int fontStyle= style & (SWT.ITALIC | SWT.BOLD | SWT.NORMAL);
		StyleRange range = new StyleRange( offset,
				length,
				attr.getForeground( ),
				attr.getBackground( ),
				fontStyle );
		range.strikeout = ( attr.getStyle( ) & TextAttribute.STRIKETHROUGH ) != 0;
		range.underline = ( attr.getStyle( ) & TextAttribute.UNDERLINE ) != 0;
		range.font= attr.getFont();
		presentation.addStyleRange( range );
	}
}
 

/**
 * Creates the ranges from parsing the code with the PyCodeScanner.
 *
 * @param textPresentation this is the container of the style ranges.
 * @param scanner the scanner used to parse the document.
 * @param doc document to parse.
 * @param partitionOffset the offset of the document we should parse.
 * @param partitionLen the length to be parsed.
 */
private void createDefaultRanges(TextPresentation textPresentation, PyCodeScanner scanner, Document doc,
        int partitionOffset, int partitionLen) {

    scanner.setRange(doc, partitionOffset, partitionLen);

    IToken nextToken = scanner.nextToken();
    while (!nextToken.isEOF()) {
        Object data = nextToken.getData();
        if (data instanceof TextAttribute) {
            TextAttribute textAttribute = (TextAttribute) data;
            int offset = scanner.getTokenOffset();
            int len = scanner.getTokenLength();
            Color foreground = textAttribute.getForeground();
            Color background = textAttribute.getBackground();
            int style = textAttribute.getStyle();
            textPresentation.addStyleRange(new StyleRange(offset, len, foreground, background, style));

        }
        nextToken = scanner.nextToken();
    }
}
 

/**
 * @return Returns a corresponding style range.
 */
public StyleRange createStyleRange() {
	int len = getLength();

	TextAttribute textAttribute = attribute;
	int style = textAttribute.getStyle();
	int fontStyle = style & (SWT.ITALIC | SWT.BOLD | SWT.NORMAL);
	StyleRange styleRange = new StyleRange(getOffset(), len, textAttribute.getForeground(),
			textAttribute.getBackground(), fontStyle);
	styleRange.strikeout = (style & TextAttribute.STRIKETHROUGH) != 0;
	styleRange.underline = (style & TextAttribute.UNDERLINE) != 0;
	styleRange.font = textAttribute.getFont();

	return styleRange;
}
 

protected void setWSTToken(IEclipsePreferences prefs, Theme theme, String ourEquivalentScope, String prefKey,
		boolean revertToDefaults)
{
	if (revertToDefaults)
	{
		prefs.remove(prefKey);
	}
	else
	{
		TextAttribute attr = theme.getTextAttribute(ourEquivalentScope);
		boolean bold = (attr.getStyle() & SWT.BOLD) != 0;
		boolean italic = (attr.getStyle() & SWT.ITALIC) != 0;
		boolean strikethrough = (attr.getStyle() & TextAttribute.STRIKETHROUGH) != 0;
		boolean underline = (attr.getStyle() & TextAttribute.UNDERLINE) != 0;
		StringBuilder value = new StringBuilder();
		value.append(Theme.toHex(attr.getForeground().getRGB()));
		value.append('|');
		value.append(Theme.toHex(attr.getBackground().getRGB()));
		value.append('|');
		value.append(bold);
		value.append('|');
		value.append(italic);
		value.append('|');
		value.append(strikethrough);
		value.append('|');
		value.append(underline);
		prefs.put(prefKey, value.toString());
	}
}
 

private boolean matchesDefaults(TextAttribute attr)
{
	if (attr == null)
	{
		return false;
	}

	// Make sure font is just normal
	int style = attr.getStyle();
	int fontStyle = style & (SWT.ITALIC | SWT.BOLD | SWT.NORMAL);
	if (fontStyle != SWT.NORMAL)
	{
		return false;
	}
	if ((style & TextAttribute.STRIKETHROUGH) != 0)
	{
		return false;
	}
	if ((style & TextAttribute.UNDERLINE) != 0)
	{
		return false;
	}

	// Is FG different?
	Color fg = attr.getForeground();
	if (fg != null && !fg.getRGB().equals(getCurrentTheme().getForeground()))
	{
		return false;
	}

	// Is BG different?
	Color bg = attr.getBackground();
	if (bg != null && !bg.getRGB().equals(getCurrentTheme().getBackground()))
	{
		return false;
	}
	return true;
}
 

/**
 * @return Returns a corresponding style range.
 */
public StyleRange createStyleRange() {
	int len= 0;
	if (fStyle.isEnabled())
		len= getLength();

	TextAttribute textAttribute= fStyle.getTextAttribute();
	int style= textAttribute.getStyle();
	int fontStyle= style & (SWT.ITALIC | SWT.BOLD | SWT.NORMAL);
	StyleRange styleRange= new StyleRange(getOffset(), len, textAttribute.getForeground(), textAttribute.getBackground(), fontStyle);
	styleRange.strikeout= (style & TextAttribute.STRIKETHROUGH) != 0;
	styleRange.underline= (style & TextAttribute.UNDERLINE) != 0;

	return styleRange;
}
 

private void adaptToTextStyleChange(Highlighting highlighting, PropertyChangeEvent event, int styleAttribute) {
	boolean eventValue= false;
	Object value= event.getNewValue();
	if (value instanceof Boolean)
		eventValue= ((Boolean) value).booleanValue();
	else if (IPreferenceStore.TRUE.equals(value))
		eventValue= true;

	TextAttribute oldAttr= highlighting.getTextAttribute();
	boolean activeValue= (oldAttr.getStyle() & styleAttribute) == styleAttribute;

	if (activeValue != eventValue)
		highlighting.setTextAttribute(new TextAttribute(oldAttr.getForeground(), oldAttr.getBackground(), eventValue ? oldAttr.getStyle() | styleAttribute : oldAttr.getStyle() & ~styleAttribute));
}
 

/**
 * Adds style information to the given text presentation.
 *
 * @param presentation the text presentation to be extended
 * @param offset the offset of the range to be styled
 * @param length the length of the range to be styled
 * @param attr the attribute describing the style of the range to be styled
 */
protected void addRange(TextPresentation presentation, int offset, int length, TextAttribute attr) {
    if (attr != null) {
        int style = attr.getStyle();
        int fontStyle = style & (SWT.ITALIC | SWT.BOLD | SWT.NORMAL);
        StyleRange styleRange = new StyleRange(offset, length, attr.getForeground(), attr.getBackground(),
                fontStyle);
        styleRange.strikeout = (style & TextAttribute.STRIKETHROUGH) != 0;
        styleRange.underline = (style & TextAttribute.UNDERLINE) != 0;
        styleRange.font = attr.getFont();
        presentation.addStyleRange(styleRange);
    }
}
 

/**
 * Color the text in the sample area according to the current preferences
 */
void applyStyles( )
{
	if ( fText == null || fText.isDisposed( ) )
		return;

	try
	{
		ITypedRegion[] regions = TextUtilities.computePartitioning( fDocument,
				IDocumentExtension3.DEFAULT_PARTITIONING,
				0,
				fDocument.getLength( ),
				true );
		if ( regions.length > 0 )
		{
			for ( int i = 0; i < regions.length; i++ )
			{
				ITypedRegion region = regions[i];
				String namedStyle = (String) fContextToStyleMap.get( region.getType( ) );
				if ( namedStyle == null )
					continue;
				TextAttribute attribute = getAttributeFor( namedStyle );
				if ( attribute == null )
					continue;
				int fontStyle = attribute.getStyle( )
						& ( SWT.ITALIC | SWT.BOLD | SWT.NORMAL );
				StyleRange style = new StyleRange( region.getOffset( ),
						region.getLength( ),
						attribute.getForeground( ),
						attribute.getBackground( ),
						fontStyle );
				style.strikeout = ( attribute.getStyle( ) & TextAttribute.STRIKETHROUGH ) != 0;
				style.underline = ( attribute.getStyle( ) & TextAttribute.UNDERLINE ) != 0;
				style.font = attribute.getFont( );
				fText.setStyleRange( style );
			}
		}
	}
	catch ( BadLocationException e )
	{
		ExceptionHandler.handle( e );
	}
}
 

private ScriptStyleRange getIt(String content, int offset, TextAttribute attr, int scriptStyle) {
    //background is the default (already set)
    Color background = attr.getBackground();
    return new ScriptStyleRange(offset, content.length(), attr.getForeground(), background, scriptStyle,
            attr.getStyle());
}
 

/**
 * Adds style information to the given text presentation.
 *
 * @param presentation
 *            the text presentation to be extended
 * @param offset
 *            the offset of the range to be styled
 * @param length
 *            the length of the range to be styled
 * @param attr
 *            the attribute describing the style of the range to be styled
 * @param lastLineStyleRanges
 */
protected void addRange(TextPresentation presentation, int offset, int length, TextAttribute attr) {
	if (attr != null) {
		int style = attr.getStyle();
		int fontStyle = style & (SWT.ITALIC | SWT.BOLD | SWT.NORMAL);
		StyleRange styleRange = new StyleRange(offset, length, attr.getForeground(), attr.getBackground(),
				fontStyle);
		styleRange.strikeout = (style & TextAttribute.STRIKETHROUGH) != 0;
		styleRange.underline = (style & TextAttribute.UNDERLINE) != 0;
		styleRange.font = attr.getFont();
		presentation.addStyleRange(styleRange);
	}
}
 

/**
 * Creates a {@link StyleRange} from the given parameters.
 *
 * @param offset
 *          the offset
 * @param length
 *          the length of the range
 * @param textAttribute
 *          the {@link TextAttribute}
 * @return a {@link StyleRange} from the given parameters
 */
public static StyleRange createStyleRange(final int offset, final int length, final TextAttribute textAttribute) {
  int style = textAttribute.getStyle();
  int fontStyle = style & (SWT.ITALIC | SWT.BOLD | SWT.NORMAL);
  StyleRange styleRange = new StyleRange(offset, length, textAttribute.getForeground(), textAttribute.getBackground(), fontStyle);
  styleRange.strikeout = (style & TextAttribute.STRIKETHROUGH) != 0;
  styleRange.underline = (style & TextAttribute.UNDERLINE) != 0;
  styleRange.font = textAttribute.getFont();
  return styleRange;
}