Created
July 21, 2012 10:02
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Wrapping and unwrapping coffeescript code blocks
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" See http://andrewradev.com/2012/04/03/manipulating-coffeescript-with-vim-part-1-text-objects/ | |
" for details on the implementation | |
nnoremap ,O : call <SID>OpenWrappingLineAbove('n')<cr> | |
xnoremap ,O :<c-u>call <SID>OpenWrappingLineAbove('v')<cr> | |
nnoremap ,dh : call <SID>DeleteWrappingLine('n')<cr> | |
xnoremap ,dh :<c-u>call <SID>DeleteWrappingLine('v')<cr> | |
function! s:OpenWrappingLineAbove(mode) | |
if a:mode ==# 'v' | |
let start = line("'<") | |
let end = line("'>") | |
else | |
let start = line('.') | |
let end = s:LowerIndentLimit(start) | |
endif | |
let indent = indent(start) | |
call s:IncreaseIndent(start, end, 1) | |
normal! O | |
call s:SetIndent(line('.'), line('.'), indent) | |
call feedkeys('A') | |
undojoin | |
endfunction | |
function! s:DeleteWrappingLine(mode) | |
if a:mode ==# 'v' | |
let start_line = line("'<") | |
let end_line = line("'>") | |
let new_current_line = nextnonblank(end_line + 1) | |
if end_line == line('$') | |
let indent = 0 | |
else | |
let indent = indent(new_current_line) - indent(start_line) | |
endif | |
let amount = indent / &sw | |
exe "'<,'>delete" | |
else | |
let amount = 1 | |
normal! dd | |
endif | |
let start = line('.') | |
let end = s:LowerIndentLimit(start) | |
call s:DecreaseIndent(start, end, amount) | |
endfunction | |
function! s:LowerIndentLimit(lineno) | |
let base_indent = indent(a:lineno) | |
let current_line = a:lineno | |
let next_line = nextnonblank(current_line + 1) | |
while current_line < line('$') && indent(next_line) >= base_indent | |
let current_line = next_line | |
let next_line = nextnonblank(current_line + 1) | |
endwhile | |
return current_line | |
endfunction | |
function! s:UpperIndentLimit(lineno) | |
let base_indent = indent(a:lineno) | |
let current_line = a:lineno | |
let prev_line = prevnonblank(current_line - 1) | |
while current_line > 0 && indent(prev_line) >= base_indent | |
let current_line = prev_line | |
let prev_line = prevnonblank(current_line - 1) | |
endwhile | |
return current_line | |
endfunction | |
function! s:SetIndent(from, to, indent) | |
let saved_cursor = getpos('.') | |
exe a:from.','.a:to.'s/^\s*/'.repeat(' ', a:indent) | |
call setpos('.', saved_cursor) | |
endfunction | |
function! s:IncreaseIndent(from, to, amount) | |
let saved_cursor = getpos('.') | |
let command = repeat('>', a:amount) | |
exe a:from.','.a:to.command | |
call setpos('.', saved_cursor) | |
endfunction | |
function! s:DecreaseIndent(from, to, amount) | |
let saved_cursor = getpos('.') | |
let command = repeat('<', a:amount) | |
exe a:from.','.a:to.command | |
call setpos('.', saved_cursor) | |
endfunction |
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