Created
February 8, 2024 11:24
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Highlight ranges as you type them, proof-of-concept
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" Save in ~/.vim/plugin/range_highlight.vim | |
augroup range_highlight | |
autocmd! | |
autocmd CmdlineChanged : call s:RangeHighlight() | |
autocmd CmdlineLeave : call s:RangeClear() | |
augroup END | |
let s:match_id = 0 | |
function! s:RangeHighlight() abort | |
let command_line = getcmdline() | |
let start_line = 0 | |
let end_line = 0 | |
let two_lines_pattern = '^\(\d\+\),\(\d\+\)' | |
let single_line_pattern = '^\d\+' | |
if command_line =~ two_lines_pattern | |
let [_match, first, second; _rest] = matchlist(command_line, two_lines_pattern) | |
let start_line = str2nr(first) | |
let end_line = str2nr(second) | |
elseif command_line =~ single_line_pattern | |
let start_line = str2nr(matchstr(command_line, single_line_pattern)) | |
let end_line = start_line | |
endif | |
if start_line > 0 && end_line > 0 && start_line <= end_line | |
call s:RangeClear() | |
let s:match_id = matchadd('Visual', '\%' .. start_line .. 'l\_.*\%' .. end_line .. 'l') | |
redraw | |
endif | |
endfunction | |
function! s:RangeClear() abort | |
if s:match_id > 0 | |
call matchdelete(s:match_id) | |
let s:match_id = 0 | |
endif | |
endfunction |
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