Java 类org.eclipse.jface.text.source.LineNumberRulerColumn 实例源码

private static void paintLine(int line, int y, int lineHeight, GC gc, Display display,
        LineNumberChangeRulerColumn l) {
    try {
        Method m = LineNumberRulerColumn.class
                .getDeclaredMethod("paintLine",
                        new Class[] { int.class, int.class, int.class, GC.class, Display.class });
        m.setAccessible(true);
        m.invoke(l, line, y, lineHeight, gc, display);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

@Override
protected void initializeLineNumberRulerColumn(LineNumberRulerColumn rulerColumn)
{
    super.initializeLineNumberRulerColumn(rulerColumn);
    if (rulerColumn instanceof CommonLineNumberChangeRulerColumn)
    {
        ((CommonLineNumberChangeRulerColumn) rulerColumn).showLineNumbers(isLineNumberVisible());
    }
    this.fThemeableEditorColorsExtension.initializeLineNumberRulerColumn(rulerColumn);
}

/**
 * Creates a new line number ruler column that is appropriately initialized.
 * @param annotationModel 
 * 
 * @return the created line number column
 */
private IVerticalRulerColumn createLineNumberRulerColumn( )
{
    LineNumberRulerColumn column = new LineNumberRulerColumn( );

    column.setForeground( JSSourceViewerConfiguration.getColorByCategory( PreferenceNames.P_LINENUMBER_COLOR ) );
    return column;
}

/**
 * Creates a new line number ruler column that is appropriately initialized.
 * 
 * @param annotationModel
 * 
 * @return the created line number column
 */
private IVerticalRulerColumn createLineNumberRulerColumn( )
{
    LineNumberRulerColumn column = new LineNumberRulerColumn( );

    column.setForeground( JSSourceViewerConfiguration.getColorByCategory( PreferenceNames.P_LINENUMBER_COLOR ) );
    return column;
}

public void createPartControl(Composite parent)
{
    int VERTICAL_RULER_WIDTH = 12;

    int styles = SWT.V_SCROLL | SWT.H_SCROLL | SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION;
    ISharedTextColors sharedColors = EditorsPlugin.getDefault().getSharedTextColors();
    IOverviewRuler overviewRuler = new OverviewRuler(null, VERTICAL_RULER_WIDTH, sharedColors);
    CompositeRuler ruler = new CompositeRuler(VERTICAL_RULER_WIDTH);

    _document = new Document();
    _document.set(_docString);

    _annotationModel = new AnnotationModel();
    _annotationModel.connect(_document);

    _sourceViewer = new SourceViewer(parent, ruler, overviewRuler, true, styles);
    _sourceViewer.configure(new SourceViewerConfiguration());

    _sds = new SourceViewerDecorationSupport(_sourceViewer, overviewRuler, null, sharedColors);

    AnnotationPreference ap = new AnnotationPreference();
    ap.setColorPreferenceKey(ANNO_KEY_COLOR);
    ap.setHighlightPreferenceKey(ANNO_KEY_HIGHLIGHT);
    ap.setVerticalRulerPreferenceKey(ANNO_KEY_VERTICAL);
    ap.setOverviewRulerPreferenceKey(ANNO_KEY_OVERVIEW);
    ap.setTextPreferenceKey(ANNO_KEY_TEXT);
    ap.setAnnotationType(ANNO_TYPE);
    _sds.setAnnotationPreference(ap);

    //      _sds.install(EditorsPlugin.getDefault().getPreferenceStore());

    _sourceViewer.setDocument(_document, _annotationModel);

    _sourceViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

    ruler.addDecorator(0, new LineNumberRulerColumn());

    Annotation annotation = new Annotation(false);
    annotation.setType(ANNO_TYPE);
    Position position = new Position(0, 4);
    _annotationModel.addAnnotation(annotation, position);
    parent.layout();
}

public void initializeLineNumberRulerColumn(LineNumberRulerColumn rulerColumn)
{
    this.fLineColumn = rulerColumn;
}

@Override
protected void initializeLineNumberRulerColumn(LineNumberRulerColumn rulerColumn) {
    super.initializeLineNumberRulerColumn(rulerColumn);
    this.onInitializeLineNumberRulerColumn.call(rulerColumn);
}

/**
 * Gets the private field {@code fIndentation} from the parent instance.
 * 
 * @return the field {@code fIndentation}.
 * @throws IllegalAccessException
 *             if the Field object is enforcing Java language access control and the field
 *             {@code fIndentation} is inaccessible.
 * @throws NoSuchFieldException
 *             if the field {@code fIndentation} is not found.
 */
private int[] getIndentations() throws IllegalAccessException, NoSuchFieldException {
    // access private field via reflection
    Field privateField = LineNumberRulerColumn.class.getDeclaredField("fIndentation");
    privateField.setAccessible(true);
    int[] indentations = (int[]) privateField.get(this);
    privateField.setAccessible(false);
    return indentations;
}