[jira] [Commented] (NETBEANS-4940) Caret drawing problems over a TAB

["Ernie Rael (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NETBEANS-4940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17225552#comment-17225552 ] 

Ernie Rael commented on NETBEANS-4940:
--------------------------------------

editor.lib2's EditorCaret exhibits this problem. This issue was filed after seeing a plugin, using the editor.lib BaseCaret. There is considerable discussion about this issue in the PR #2482 

EditorCaret is now the default caret, BaseCaret is no longer used expect by 3rd party plugins. EditorCaret has both single caret and multi-caret and they both exhibit this problem. 

Switching to multi-caret modes happens by choosing multiple positions by clicking on new positions while CTRL+Shift is held down.

To see the multi-caret problem you can do
# Starting with a clean userdir/cachedir, start up NetBeans
# in Editor>Formatting>AllLang,Tabs... turn off EnableIndent & ExpandTabtoSpaces, set NumSpacePerIndent to 8 (to match tab size)
# NewFile>Other>EmptyFile.
# I added a line full of regular chars, two lines of just TABs, then a line of regular chars.
# Place caret on a TAB in second line, add a second caret on regular char in last line.
# Hit the right arrow.
# Observe the rendering artifacts over the TAB.



> Caret drawing problems over a TAB
> ---------------------------------
>
>                 Key: NETBEANS-4940
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-4940
>             Project: NetBeans
>          Issue Type: Bug
>          Components: editor - Other
>    Affects Versions: 12.1
>            Reporter: Ernie Rael
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 3h 50m
>  Remaining Estimate: 0h
>
> To recreate.
>  # Open a file in the editor (emptyfile, java file,...)
>  # Insert a tab into the file
>  # Place the caret over the tab
> Observe the caret as it blinks and notice that it only partially blanks. There is a vertical artifact.
> The jVi application uses a block caret (rather than a vertical line) and the problem is more more pronounced.



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