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" gs will propegate a change made to a <cword> over a text object. This is done
" by the plugin taking note of the word under the cursor before a text change is
" made and what the word was changed to after the text was changed, and gs will
" create a substitute command based on that and apply it to a text object.
"
" This is extremely useful and ergonomic for renaming variables, types or
" otherwise in a text body.
noremap <silent> gs :set operatorfunc=<SID>do_subst_enter<cr>g@
vnoremap <silent> gs :call <SID>v_do_subst_enter()<cr>
" gS is like gs, except it:
"
" * doesn't feed a newline at the end
" * doesn't wrap the string to substitue in word boundaries.
noremap <silent> gS :set operatorfunc=<SID>do_subst_no_enter<cr>g@
vnoremap <silent> gS :call <SID>v_do_subst_no_enter()<cr>
" Hotkey for replacing the most recently searched matches.
noremap <C-s> <esc>:<C-u>%s//
let s:current_word_1 = ''
let s:current_word = ''
let s:old_word = ''
let s:new_word = ''
function! s:save_cur_word() abort
let s:current_word_1 = s:current_word
let s:current_word = expand("<cword>")
endfunction
function! s:save_new_word() abort
let s:old_word = s:current_word_1
let s:new_word = expand("<cword>")
endfunction
augroup FieldMarshalSubstitute
au!
autocmd CursorMoved * call s:save_cur_word()
autocmd TextChanged * call s:save_new_word()
augroup END
function! s:do_subst_enter(...) abort
call s:do_subst_priv("'[", "']", v:true)
endfunction
function! s:do_subst_no_enter(...) abort
call s:do_subst_priv("'[", "']", v:false)
endfunction
function! s:v_do_subst_enter(...) abort
call s:do_subst_priv("'<", "'>", v:true)
endfunction
function! s:v_do_subst_no_enter(...) abort
call s:do_subst_priv("'<", "'>", v:false)
endfunction
function! s:do_subst_priv(m0, m1, do_enter) abort
let [_, lnum0, _, _] = getpos(a:m0)
let [_, lnum1, _, _] = getpos(a:m1)
" Need to call feedkeys() because @. may contain special characters like
" backspace.
call feedkeys(
\ printf(
\ ":%s %d,%d s/\\V%s%s%s/%s/g%s",
\ a:do_enter ? "silent!" : "",
\ lnum0,
\ lnum1,
\ a:do_enter ? "\\<" : "",
\ escape(s:old_word, '/\'),
\ a:do_enter ? "\\>" : "",
\ escape(s:new_word, '/\'),
\ a:do_enter ? "\n" : ""))
endfunction
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