Bug 66094 IAE / Some copy operations don't pick up all of the collapsed regions
New feature to collapse regions of Java source - very nice. The way I copy between files is to position the cursor to the start of the file, use Ctrl+Shift+End to select all of the text between cursor and EOF, or sometimes Shift+Arrow keys to highlight a selected region. After this use Ctrl+C to copy into the clipboard. The collapsed regions are not included. Using Edit>Select All to select the file's contents does work, but holding down the shift key and using the keyboard arrows or Ctrl+End to traverse the selection cursor over collapsed regions doesn't pick up the collapsed bits.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
ISourceViewer viewer= getSourceViewer();
			if (viewer == null)
				return;
				
			StyledText text= viewer.getTextWidget();
			if (text == null || text.isDisposed())
				return;
				
				
			int offset= 0;
			int length= 0;
			if (viewer instanceof ITextViewerExtension5) {
				
				ITextViewerExtension5 extension= (ITextViewerExtension5) viewer;
				IRegion widgetRange= extension.modelRange2WidgetRange(fActiveRegion);
				if (widgetRange == null)
					return;
					
				offset= widgetRange.getOffset();
				length= widgetRange.getLength();
				
			} else {
				
				IRegion region= viewer.getVisibleRegion();			
				if (!includes(region, fActiveRegion))
					return;		    
				
				offset= fActiveRegion.getOffset() - region.getOffset();
				length= fActiveRegion.getLength();
			}