[vim/vim] Vim flickers if syntax highlighting is enabled. (Issue #19663)

[Yggdroot]

Yggdroot created an issue (vim/vim#19663)

Steps to reproduce

I don't know how to reproduce, if a buffer has sign, text property and highlights of matchadd(),
then do py3 vim.current.buffer[:] = a little different list, the flicker may happen.

By the way, is there a way to disable the redraw of text property changes and redraw of syntax changes and the redraw of highlights of matchadd(), and the redraw of sign and all the redraw.[Feature Request]

Expected behaviour

No flicker.

Version of Vim

latest

Environment

all

Logs and stack traces

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[mattn]

mattn left a comment (vim/vim#19663)

Could you please try this?

#19662

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[Yggdroot]

Yggdroot left a comment (vim/vim#19663)

Could you please try this?

#19662

It does not fix the issue.

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[Yggdroot]

Yggdroot left a comment (vim/vim#19663)

The issue is because of #5704.
Now I don't know how to minimize the reproducing steps.
setlocal signcolumn=no must have some redrawing bug.

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[Yggdroot]

Yggdroot left a comment (vim/vim#19663)

3.gif (view on web)

Although the issue can only be reproduced in gVim, terminal Vim should have the same problem.

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[mattn]

mattn left a comment (vim/vim#19663)

@Yggdroot Is it caused by the redraw of signcolumn=no? If so, please update the title and description of this issue and include the steps to reproduce the problem.

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[Yggdroot]

Yggdroot left a comment (vim/vim#19663)

@Yggdroot Is it caused by the redraw of signcolumn=no? If so, please update the title and description of this issue and include the steps to reproduce the problem.

The reproduce steps is shown as the gif above.

1. gvim --clean
2. :e a.vim (any file)
3. :set signcolumn=no (auto, no, yes, number have the same effect)
4. try :set signcolumn=no for several times.

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[mattn]

mattn left a comment (vim/vim#19663)

If you have environment to build vim, please test #19713

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[Yggdroot]

Yggdroot left a comment (vim/vim#19663)

If you have environment to build vim, please test #19713

It works. Thanks.

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[Christian Brabandt]

Closed #19663 as completed via 4292eea.

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