Bug 16938 DCR: Class File Editor should scroll more naturally
20020521 (F1) (This may not be a debug PR - I wasn't sure). - put a breakpoint in a java file, right before a System.out.println statement - debug to the breakpoint - step in to the println call (I happened to go in to StringBuffer first - all that matters is that you do not have the source for the class you just stepped into) - a Class File Editor opens - click on the scrollbar's down arrow Problem: the editor only scrolls one pixel at a time. It should scroll one line at a time when you click on the arrows. - click on the scrollbar's background to scroll a page at a time Problem: the editor only scrolls about a line at a time when it should be scrolling a page at a time. Grabbing the thumb and scrolling with that works well. So the workaround, if the user wants to scroll through the Class File editor, is to always use the thumb.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/ClassFileEditor.java
if (getEditorInput() instanceof IClassFileEditorInput) {
			IClassFileEditorInput input= (IClassFileEditorInput) getEditorInput();
			IJavaElement parent= element.getAncestor(IJavaElement.CLASS_FILE);
			if (input.getClassFile().equals(parent))
				return element;
		}
		return null;
	}
	
	/*
	 * @see IEditorPart#saveState(IMemento)
	 */
	public void saveState(IMemento memento) {
	}
	
	/*
	 * @see JavaEditor#setOutlinePageInput(JavaOutlinePage, IEditorInput)
	 */
	protected void setOutlinePageInput(JavaOutlinePage page, IEditorInput input) {
		if (page != null && input instanceof IClassFileEditorInput) {
			IClassFileEditorInput cfi= (IClassFileEditorInput) input;
			page.setInput(cfi.getClassFile());
		}
	}
	
	/*
	 * 1GEPKT5: ITPJUI:Linux - Source in editor for external classes is editable
	 * Removed methods isSaveOnClosedNeeded and isDirty.
	 * Added method isEditable.
	 */