[NETBEANS-690] Editor randomly Jumps about in Source file

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 9.0
• Component/s: editor - Code folding, editor - Formatting & Indentation
• Labels: Regression jumping

Environment

Product Version: Apache NetBeans IDE Dev (Build incubator-netbeans-release-205-on-20180202)
Java: 10; Java HotSpot(TM) 64-Bit Server VM 10+46
Runtime: Java(TM) SE Runtime Environment 10+46
System: Windows 10 version 10.0 running on amd64; Cp1252; en_AU (nb)
User directory: Z:\tmp\.other\user\netbeans\v09.00-beta\FourAbs
Cache directory: Z:\tmp\.other\cache\netbeans\FourAbs-09

• Assignee: Unassigned
• Reporter: aplatypus
• Created: 18/Apr/18 07:31
• Updated: 04/May/18 02:00

Description

context

• Normal everyday editing of java code
• The position on the SCREEN that user is viewing stays put

expected / desirable

• Edit files without any warning or pattern – Except that when it happens you might think it was because of ... X
• Some examples
  • Scroll file to some other section – Then do an action. File jumps.
  • Select or try to select code in another part of the file; or in another window. File jumps.
  • Fold or Expand a method or comment and file Jumps
  • editing in one window – code jumps in other views of that file.

actual

• The editor often jumps around in the source file with not warning
  • Sometimes it can be OK, and other times your context is shattered!

Impact

• Extremely annoying
• need to repeat work to reestablish context
• sometime need to find a different way to achieve the goal

Issue Links

• is related to: NETBEANS-638 Second editor window spontaneously changes current line context