Java 类org.eclipse.jface.text.ITextHoverExtension2 实例源码

@SuppressWarnings("deprecation")
public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) {
    if (currentHover != null) {
        if (currentHover instanceof ITextHoverExtension2)
            return ((ITextHoverExtension2) currentHover).getHoverInfo2(textViewer, hoverRegion);
        else {
            return currentHover.getHoverInfo(textViewer, hoverRegion);
        }
    }
    return null;
}

@SuppressWarnings("deprecation")
public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion)
{
    if (activeTextHover != null)
    {
        Object info = null;
        if (activeTextHover instanceof AbstractCommonTextHover)
        {
            AbstractCommonTextHover commonHover = (AbstractCommonTextHover) activeTextHover;
            commonHover.setEditor(getEditor());
        }
        if (activeTextHover instanceof ITextHoverExtension2)
        {
            info = ((ITextHoverExtension2) activeTextHover).getHoverInfo2(textViewer, hoverRegion);
        }
        else
        {
            info = activeTextHover.getHoverInfo(textViewer, hoverRegion);
        }
        if (info != null)
        {
            return info;
        }
    }
    String defaultInfo = super.getHoverInfo(textViewer, hoverRegion);
    if (defaultInfo != null)
    {
        // wrap it in a SimpleTextHover so it will look the same as other hovers (i.e. use the theme colors,
        // etc.)
        return new SimpleTextHover(defaultInfo, null).getHoverInfo2(textViewer, hoverRegion);
    }
    return null;
}

@SuppressWarnings("deprecation")
@Override
public IRegion getHoverRegion(ITextViewer textViewer, int offset)
{
    activeTextHover = null;
    List<TextHoverDescriptor> descriptors = getEnabledTextHoverDescriptors(textViewer, offset);
    for (TextHoverDescriptor descriptor : descriptors)
    {
        ITextHover textHover = descriptor.createTextHover();
        IRegion region = null;
        if (textHover != null)
        {
            region = textHover.getHoverRegion(textViewer, offset);
        }
        if (region != null)
        {
            if (descriptors.size() > 1)
            {
                if (textHover instanceof ITextHoverExtension2)
                {
                    if (((ITextHoverExtension2) textHover).getHoverInfo2(textViewer, region) == null)
                    {
                        continue;
                    }
                }
                else if (textHover.getHoverInfo(textViewer, region) == null)
                {
                    continue;
                }
            }
            activeTextHover = textHover;
            return region;
        }
    }
    return super.getHoverRegion(textViewer, offset);
}

/**
 * Returns the information which should be presented when a hover or persistent popup is shown
 * for the specified hover region.
 * 
 * @param textViewer the viewer on which the hover popup should be shown
 * @param hoverRegion the text range in the viewer which is used to determine the hover display
 *            information
 * @param forInformationProvider <code>true</code> iff the hover info is requested by the
 *            information presenter. In this case, the method only considers text hovers for
 *            which a proper IInformationControlCreator is available that can supply focusable
 *            and resizable information controls.
 * 
 * @return the hover popup display information, or <code>null</code> if none available
 * 
 * @see ITextHoverExtension2#getHoverInfo2(ITextViewer, IRegion)
 * @since 3.8
 */
public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion, boolean forInformationProvider) {

    checkTextHovers();
    fBestHover= null;

    if (fInstantiatedTextHovers == null)
        return null;

    for (Iterator<IJavaEditorTextHover> iterator= fInstantiatedTextHovers.iterator(); iterator.hasNext(); ) {
        ITextHover hover= iterator.next();
        if (hover == null)
            continue;

        if (hover instanceof ITextHoverExtension2) {
            Object info= ((ITextHoverExtension2) hover).getHoverInfo2(textViewer, hoverRegion);
            if (info != null && !(forInformationProvider && getInformationPresenterControlCreator(hover) == null)) {
                fBestHover= hover;
                return info;
            }
        } else {
            String s= hover.getHoverInfo(textViewer, hoverRegion);
            if (s != null && s.trim().length() > 0) {
                fBestHover= hover;
                return s;
            }
        }
    }

    return null;
}

@Override
public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) {
    if (ensureHoverCreated()) {
        if (fHover instanceof ITextHoverExtension2)
            return ((ITextHoverExtension2) fHover).getHoverInfo2(textViewer, hoverRegion);
        else
            return fHover.getHoverInfo(textViewer, hoverRegion);
    }

    return null;
}

/**
 * Returns the information which should be presented when a hover or persistent popup is shown
 * for the specified hover region.
 * 
 * @param textViewer the viewer on which the hover popup should be shown
 * @param hoverRegion the text range in the viewer which is used to determine the hover display
 *            information
 * @param forInformationProvider <code>true</code> iff the hover info is requested by the
 *            information presenter. In this case, the method only considers text hovers for
 *            which a proper IInformationControlCreator is available that can supply focusable
 *            and resizable information controls.
 * 
 * @return the hover popup display information, or <code>null</code> if none available
 * 
 * @see ITextHoverExtension2#getHoverInfo2(ITextViewer, IRegion)
 * @since 3.8
 */
public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion, boolean forInformationProvider) {

    checkTextHovers();
    fBestHover= null;

    if (fInstantiatedTextHovers == null)
        return null;

    for (Iterator<IJavaEditorTextHover> iterator= fInstantiatedTextHovers.iterator(); iterator.hasNext(); ) {
        ITextHover hover= iterator.next();
        if (hover == null)
            continue;

        if (hover instanceof ITextHoverExtension2) {
            Object info= ((ITextHoverExtension2) hover).getHoverInfo2(textViewer, hoverRegion);
            if (info != null && !(forInformationProvider && getInformationPresenterControlCreator(hover) == null)) {
                fBestHover= hover;
                return info;
            }
        } else {
            String s= hover.getHoverInfo(textViewer, hoverRegion);
            if (s != null && s.trim().length() > 0) {
                fBestHover= hover;
                return s;
            }
        }
    }

    return null;
}

@Override
public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) {
    if (ensureHoverCreated()) {
        if (fHover instanceof ITextHoverExtension2)
            return ((ITextHoverExtension2) fHover).getHoverInfo2(textViewer, hoverRegion);
        else
            return fHover.getHoverInfo(textViewer, hoverRegion);
    }

    return null;
}

@SuppressWarnings("deprecation")
@Override
public Object getHoverInfo(ISourceBuffer sourceBuffer, IRegion hoverRegion, ITextViewer textViewer) {

    fDelegate = getDelegate();
       if (fDelegate instanceof ITextHoverExtension2) {
        return ((ITextHoverExtension2) fDelegate).getHoverInfo2(textViewer, hoverRegion);
       }
       // fall back to legacy method
       if (fDelegate != null) {
           return fDelegate.getHoverInfo(textViewer, hoverRegion);
       }
       return null;
   }