/*
* @see IPainter#paint(int)
*/
public void paint(int reason) {
if (fViewer == null) {
return;
}
if (fViewer.getDocument() == null) {
deactivate(false);
return;
}
// initialization
if (!fIsActive) {
StyledText textWidget = fViewer.getTextWidget();
textWidget.addLineBackgroundListener(this);
textWidget.addPaintListener(this);
fPositionManager.managePosition(fCurrentLine);
fIsActive = true;
}
// This forces redraw of the line highlight
if (updateHighlightLine()) {
// clear last line
// Fix the background colors for tokens that didn't have the same as line!
if (isOpaque() && !fLastLine.isDeleted() && fViewer instanceof ITextViewerExtension2) {
ITextViewerExtension2 ext = (ITextViewerExtension2) fViewer;
try {
ext.invalidateTextPresentation(fLastLine.getOffset(), fLastLine.getLength());
} catch (Exception e) {
IdeLog.logError(CommonEditorPlugin.getDefault(), e);
}
}
drawHighlightLine(fLastLine);
// draw new line
drawHighlightLine(fCurrentLine);
}
}
/** Extended to support the Highlighting of matching parenthesis. */
private void addMatchingCharacterPainter() {
ITextViewerExtension2 extension = (ITextViewerExtension2) getSourceViewer();
DefaultCharacterPairMatcher matcher =
new DefaultCharacterPairMatcher(new char[] {'(', ')', '{', '}', '[', ']'});
MatchingCharacterPainter painter = new MatchingCharacterPainter(getSourceViewer(), matcher);
painter.setColor(Display.getDefault().getSystemColor(SWT.COLOR_GRAY));
extension.addPainter(painter);
}
private void repairPresentation(ITextViewer viewer) {
if (fRememberedStyleRange != null) {
if (viewer instanceof ITextViewerExtension2) {
// attempts to reduce the redraw area
ITextViewerExtension2 viewer2 = (ITextViewerExtension2) viewer;
viewer2.invalidateTextPresentation(
fRememberedStyleRange.start, fRememberedStyleRange.length);
} else {
viewer.invalidateTextPresentation();
}
}
}