Ingo Karkat a12144ae80 FIX: Subsequent automatic background adaptations only work in recent Vim and :hi def link ...

Vim 8.2.2034 somehow restores a :hi def link after a colorscheme change, so the override of the adapted ShowTrailingWhitespace highlight group is automatically undone. But this does not happen in Vim 7.4.1689 and also not with :hi link (what a customization would use), so it cannot be relied on.
Instead, check for a linked highlight group only once on plugin startup and store a linked ID in g:ShowTrailingWhitespace_LinkedSyntaxId.
ShowTrailingWhitespace#Color#EnsureVisibleBackgroundColor() then reuses that original ID. It also sets a s:didAutomaticBackground flag if it had modified the ShowTrailingWhitespace highlight group, and restores the link if for a changed colorscheme this adaptation is no longer necessary.

2020-12-20 11:08:07 +01:00

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ShowTrailingWhitespace.vim

FIX: Subsequent automatic background adaptations only work in recent Vim and :hi def link

2020-12-20 11:08:07 +01:00