public String getInformation(ITextViewer textViewer, IRegion subject) {
if (fImplementation != null) {
String s = fImplementation.getHoverInfo(textViewer, subject);
if (s != null && s.trim().length() > 0) return s;
}
return null;
}
@Override
public Object getHoverInfo2(ITextViewer textViewer, IRegion region) {
// Overridden from ITextHoverExtension2. We try and return the richest help available; this
// means trying to call getHoverInfo2() on any contributors, and falling back on getHoverInfo().
lastReturnedHover = null;
// Return any annotation info - i.e. errors and warnings.
String annotationHover = super.getHoverInfo(textViewer, region);
if (annotationHover != null) {
return escapeHtmlEntities(annotationHover);
}
// Check through the contributed hover providers.
for (ITextHover hoverContributer : hoverContributors) {
if (hoverContributer instanceof ITextHoverExtension2) {
Object hoverInfo =
((ITextHoverExtension2) hoverContributer).getHoverInfo2(textViewer, region);
if (hoverInfo != null) {
lastReturnedHover = hoverContributer;
return hoverInfo;
}
} else {
String hoverText = hoverContributer.getHoverInfo(textViewer, region);
if (hoverText != null) {
lastReturnedHover = hoverContributer;
return hoverText;
}
}
}
// Check for a dartdoc contribution.
return getDartDocHover(region);
}
/**
* Tries to make a text hover focusable (or "sticky").
*
* @param sourceViewer the source viewer to display the hover over
* @param textHover the hover to make focusable
* @return <code>true</code> if successful, <code>false</code> otherwise
*/
@SuppressWarnings("deprecation")
private boolean makeTextHoverFocusable(ISourceViewer sourceViewer, ITextHover textHover) {
Point hoverEventLocation = ((ITextViewerExtension2) sourceViewer).getHoverEventLocation();
int offset =
computeOffsetAtLocation(sourceViewer, hoverEventLocation.x, hoverEventLocation.y);
if (offset == -1) return false;
try {
IRegion hoverRegion = textHover.getHoverRegion(sourceViewer, offset);
if (hoverRegion == null) return false;
String hoverInfo = textHover.getHoverInfo(sourceViewer, hoverRegion);
IInformationControlCreator controlCreator = null;
if (textHover instanceof IInformationProviderExtension2)
controlCreator =
((IInformationProviderExtension2) textHover).getInformationPresenterControlCreator();
IInformationProvider informationProvider =
new InformationProvider(hoverRegion, hoverInfo, controlCreator);
fInformationPresenter.setOffset(offset);
fInformationPresenter.setAnchor(AbstractInformationControlManager.ANCHOR_BOTTOM);
fInformationPresenter.setMargins(
6, 6); // default values from AbstractInformationControlManager
String contentType =
TextUtilities.getContentType(
sourceViewer.getDocument(), AutoconfPartitionScanner.AUTOCONF_MACRO, offset, true);
fInformationPresenter.setInformationProvider(informationProvider, contentType);
fInformationPresenter.showInformation();
return true;
} catch (BadLocationException e) {
return false;
}
}
@SuppressWarnings("deprecation")
@Override
public String getHoverInfo(ITextViewer textViewer, IRegion region) {
// Return any annotation info - i.e. errors and warnings.
String annotationHover = super.getHoverInfo(textViewer, region);
if (annotationHover != null) {
return escapeHtmlEntities(annotationHover);
}
// Check through the contributed hover providers.
for (ITextHover hoverContributer : hoverContributors) {
String hoverText = hoverContributer.getHoverInfo(textViewer, region);
if (hoverText != null) {
lastReturnedHover = hoverContributer;
return hoverText;
}
}
// Check for a dartdoc contribution.
return getDartDocHover(region);
}