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https://issues.apache.org/jira/browse/NETBEANS-2082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17108332#comment-17108332
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Ernie Rael commented on NETBEANS-2082:
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{quote}I'll start by attempting to block the caret anchor in case the caret was
off the screen initially.
{quote}
Consider the case where there is a large (bigger than the screen) closed fold
which the user wants to expand, and the caret is a few lines _after_ the closed
fold. So the _caret is onscreen before the expand_. After clicking expand, I
would want to see the first line fold (like keeping the top line of the
viewport locked), rather than follow the caret and cause the screen to scroll
down leaving me looking at the end of the fold. The idea of
anchoring/scrolling-to the caret only seems relevant to initial state. (and I
could easily be missing other cases)
> 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.zip,
> 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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