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https://issues.apache.org/jira/browse/NETBEANS-2082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17107560#comment-17107560
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Svatopluk Dedic commented on NETBEANS-2082:
-------------------------------------------

The bug fixed by the mentioned commit relates to 'autofolding', which some 
people configure. When a file is opened, the IDE automatically collapses 
selected types of fold. When the file was opened at some specified place, like 
navigating by Goto symbol or from the navigator, the editor scrolled to the 
symbol, then fold views collapsed, leaving the navigated-to symbol out of the 
view.

To better understand / catch the proper bug - could you please again provide 
very detailed steps ? I was able to reproduce a behaviour where:
 * caret was positioned at start of a fold
 * I scrolled down the editor, so the caret was out of screen somewhere
 * I collapsed some nested fold - smaller one, which did not span the entire 
screen

Then the editor scrolled back to caret's position, so the place I was clicking 
at went out of sight.

Is that the bug ? Or something different ?

 

> Scroll to the caret position when code fold feature is run
> ----------------------------------------------------------
>
>                 Key: NETBEANS-2082
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-2082
>             Project: NetBeans
>          Issue Type: Bug
>          Components: editor - Code folding
>    Affects Versions: 10.0, 11.0, 11.1, 11.2
>         Environment: Netbeans 11 with OpenJDK 12. 
> Darwin MacBook-Pro-2.local 18.5.0 Darwin Kernel Version 18.5.0: Mon Mar 11 
> 20:40:32 PDT 2019; root:xnu-4903.251.3~3/RELEASE_X86_64 x86_64
> Netbeans 10 with OpenJDK 11.
> Darwin MacBook-Pro-2.local 18.2.0 Darwin Kernel Version 18.2.0: Thu Dec 20 
> 20:46:53 PST 2018; root:xnu-4903.241.1~1/RELEASE_X86_64 x86_64
>            Reporter: Pier Luigi
>            Assignee: Svatopluk Dedic
>            Priority: Critical
>         Attachments: DemoPHPCodeFoldingProblem_NB11.php, netbeans-2082.gif
>
>
> Collapsing a block often results in a jump of the editor to an incorrect 
> editing position (and scrolling the page cause a rejump to that position 
> after a second of scroll inactivity).
> The same sources works perfectly with Netbeans 8.2.



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