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let s:subword_motion = ""
let s:subword_nosave = 0
" Return the type of meta-word (i.e. camelCase, snake_case). If
" a:prefer_camel is set, then a word like ThisIs_A_MixOfCamel_And_Snake will
" some_snake_cae SomeCamelCase SOME_CONSTANT_CASE
" return 'camel', otherwise it'll return 'snake'.
function! s:detect_word_type(prefer_camel, word) abort
let is_camel = 0
if a:word =~ '[a-z][A-Z]'
let is_camel = 1
if a:prefer_camel
" The word contains a camelCase boundary.
return 'camel'
endif
endif
if a:word =~ '_\|\W'
" The word contains a sake_case boundary.
return 'snake'
endif
if is_camel
return 'camel'
endif
" There is not discernible type, it's probably just a single word.
return 'word'
endfunction
" Move the cursor to the next subowrd.
function! subwords#next(vis, forward)
if ! s:subword_nosave
if a:forward
let s:subword_motion = 'next'
else
let s:subword_motion = 'prev'
endif
endif
let i = 0
while i < v:count1
call search(
\ '\([a-z]\zs[A-Z]\ze\)\|\(\W\|_\)\zs\w\ze', (a:forward ? '' : 'b'))
let i += 1
endwhile
let s:subword_nosave = 0
endfunction
" Visually highlights a subword.
"
" If a:prefer_camel is set, then WordsLike_This will be interpreted with
" camelCase.
"
" if a:around is set, the highlight around the subword (otherwise highlight the
" inner subword).
function! subwords#visual(prefer_camel, around)
" Detect the type of the word.
let word = expand("<cword>")
let t = s:detect_word_type(a:prefer_camel, word)
let expr = ''
if t == 'camel'
let expr = 'v'
let line = getline('.')
let c = col('.') - 1
let i = 0
while line[c] =~ '[a-z]' && c >= 0
let c -= 1
let i += 1
endwhile
" camelCase
if c >= 0 && ! (line[c] =~ '[A-Z_]')
" If we are at the beginning of the meta word, the don't go back too far.
let i -= 1
endif
if i > 0
let expr .= printf("%dh", i)
endif
let expr .= 'o'
let c = col('.') - 1
let i = 0
if line[c] =~ '[A-Z_]'
" Actually on the starting capital letter, include it, but start counting
" from the next character.
let i += 1
let c += 1
endif
while c < len(line) && line[c] =~ '[a-z]'
let c += 1
let i += 1
endwhile
if i > 1
let expr .= printf("%dl", i - 1)
endif
elseif t == "snake"
let expr = 'v'
let line = getline('.')
let c = col('.') - 1
let i = 0
while c >= 0 && !( line[c] =~ '\W' ) && line[c] != '_'
let c -= 1
let i += 1
endwhile
let lhs_under = c >= 0 && line[c] == '_'
let i -= 1
let c += 1
if i > 0
let expr .= printf('%dho', i)
endif
let c = col('.') - 1
let i = 0
while c < len(line) && !(line[c] =~ '\W') && line[c] != '_'
let c += 1
let i += 1
endwhile
let rhs_under = c < len(line) && line[c] == '_'
let i -= 1
let c -= 1
if i > 0
let expr .= printf('%dl', i)
endif
if a:around
if rhs_under
let expr .= 'l'
elseif lhs_under
let expr .= 'oho'
endif
endif
elseif t == "word"
" Just a word? Easy peasy.
let expr = 'viw'
endif
return expr
endfunction!
" Clear the subword motion. (used for replacement TtfF)
function! subwords#clear_mark()
let s:subword_motion = ""
return ''
endfunction
function! subwords#repeat(char)
if s:subword_motion == ''
return a:char
endif
let mot = (s:subword_motion == 'next') != (a:char == ',')
let s:subword_nosave = 1
if mot
return "\<Plug>(next-subword)"
else
return "\<Plug>(prev-subword)"
endif
endfunction
|
