1

I would like to use two different backgrounds colors bg1 and bg2 with:

  1. bg1 for all text on a line (possibly nothing if line is empty) up to the end-of-line,
  2. bg2 for the empty area after the end-of-line,
  3. while keeping hlsearch working,
  4. and syntax highlighting working.

For example, if displaying <empty_area> as _'s starting with # on a 16-character-wide window, with "text" as the search pattern and a syntax recongizing if, it would look like:

    if "text"#______
    #_______________
        indented#___

with:

  • anything but the trailing _'s with a different background (here black foreground)...
  • ...than the trailing _'s (here gray foreground),
  • except for "text" which should be highlighted as the Search group (here green foreground),
  • and if which has the syntax highlighting of the chosen language (here blue foreground).

I have tried this in my vimrc:

hi Normal     guibg=Gray75
hi Contents   guibg=LightGray
match Contents /.\+.\@!/.

but then I lose the pattern match highlighting for hlsearch, which is I guess superseded by the Contents match.

Is there a proper way to achieve what I want: different backgrounds for text and empty area after EOL, with hlsearch and syntax highlighting still working ?

PS: The NonText group is not relevant, since it links to the empty area after the buffer, and not after each line.

4
  • The usual (and UI-agnostic) way to visualize whitespace would be :set list. While it may not look quite as good, it was built exactly for this use case.
    – Friedrich
    Jan 29 at 13:49
  • Indeed, the list option can show an EOL marker that might suffice. Would that work gilgron?
    – D. Ben Knoble
    Jan 29 at 22:25
  • Adding a character at EOL does not fit to my eye, but allowed me to find my solution. Thanks @d-ben-noble and @friedrich.
    – gilgron31
    Jan 30 at 9:52
  • I guess the lcs (listchars) variable was not judiciously set on the file I tried :set list with. In fact, with set lcs=tab:> ,trail:-,extends:>,precedes:<,nbsp:+, I get a nice complement to the 2match solution... Thanks again.
    – gilgron31
    Jan 30 at 13:51

2 Answers 2

0

I tried adding those lines to my .gvimrc file:

    hi Normal     guibg=Gray75
    hi Contents   guibg=LightGray
    match Contents /.\+.\@!/.
    noremap * *N:2mat Search /<C-R>//<C-M>n

which solves the hlsearchissue. But the highlighting involving background, like with diffvim, gets broken. So I fell back on this lighter solution:

    hi Normal       guibg=Snow2 guifg=NONE
    hi Contents     guibg=Snow1 guifg=NONE
    2match Contents /$/

which highlights the first non-character at eols and is finally noticeable enough.

0

I would do:

highlight SpecialKey guibg=LightGray

highlight Conditional guibg=LightGray
highlight Content guibg=LightGray
highlight Exception guibg=LightGray
highlight Function guibg=LightGray
highlight Include guibg=LightGray
highlight Operator guibg=LightGray
highlight Repeat guibg=LightGray
highlight Statement guibg=LightGray
highlight Structure guibg=LightGray
highlight Type guibg=LightGray

highlight Content guibg=LightGray
autocmd FileType * syntax match Content /\S\+/
2
  • 1
    This prevents any syntax highlighting, which is an unwanted effect. I have modified the question to include this requirement.
    – gilgron31
    Jan 29 at 17:35
  • I have proposed another solution that is working fine at least with Python syntax at my end. Jan 30 at 20:16

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