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Rewrite to support swapping exchange operands

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This commit is contained in:
Tom McDonald 2013-12-06 00:26:36 -05:00
parent 9833bfaf9f
commit 366ead65a2
1 changed files with 65 additions and 50 deletions
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115
plugin/exchange.vim
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@ -1,69 +1,84 @@
function! s:exchange_set(type, ...)
let sel_save = &selection
let &selection = "inclusive"
let reg_save = @@
if !exists('b:exchange_text')
if a:0
call s:store_pos(a:type, "'<", "'>")
silent exe "normal! `<" . a:type . "`>y"
elseif a:type == 'line'
call s:store_pos('V', "'[", "']")
silent exe "normal! '[V']y"
elseif a:type == 'block'
call s:store_pos('\<C-V>', "'[", "']")
silent exe "normal! `[\<C-V>`]y"
else
call s:store_pos('v', "'[", "']")
silent exe "normal! `[v`]y"
endif
let b:exchange_text = @@
if !exists('b:exchange')
let b:exchange = s:get_exchange(a:type, a:0)
else
let @@ = b:exchange_text
if a:0
silent exe "normal! `<" . a:type . "`>y"
elseif a:type == 'line'
silent exe "normal! '[V']y"
elseif a:type == 'block'
silent exe "normal! `[\<C-V>`]y"
else
silent exe "normal! `[v`]y"
let exchange1 = b:exchange
let exchange2 = s:get_exchange(a:type, a:0)
let cmp = s:compare(exchange1, exchange2)
if cmp == 0
echoerr "Exchange aborted: overlapping text"
elseif cmp > 0
let [exchange1, exchange2] = [exchange2, exchange1]
endif
let exchange_text = @@
let @@ = b:exchange_text
silent exe "normal! gvp"
let @@ = exchange_text
call s:exchange()
call s:exchange(exchange1, exchange2)
call s:exchange_clear()
endif
let &selection = sel_save
let @@ = reg_save
endfunction
function! s:exchange()
let x = getpos("'x")
" Return -1 if x comes before y in buffer,
" 0 if x and y overlap in buffer,
" 1 if x comes after y in buffer
function! s:compare(x, y)
let [xs, xe, ys, ye] = [a:x[2], a:x[3], a:y[2], a:y[3]]
" TODO: Write this function
return -1
endfunction
function! s:exchange(x, y)
let a = getpos("'a")
let b = getpos("'b")
call setpos("'a", b:exchange_start)
call setpos("'b", b:exchange_end)
silent exe "normal! mx`a" . b:exchange_mode . "`bp`x"
let reg = @@
call setpos("'a", a:y[2])
call setpos("'b", a:y[3])
let @@ = a:x[0]
silent exe "normal! `a" . a:y[1] . "`bp"
call setpos("'a", a:x[2])
call setpos("'b", a:x[3])
let @@ = a:y[0]
silent exe "normal! `a" . a:x[1] . "`bp"
call setpos("'a", a)
call setpos("'b", b)
call setpos("'x", x)
let @@ = reg
endfunction
function! s:store_pos(mode, start, end)
let b:exchange_mode = a:mode
let b:exchange_start = getpos(a:start)
let b:exchange_end = getpos(a:end)
function! s:get_exchange(type, vis)
let reg = @@
let selection = &selection
let &selection = 'inclusive'
if a:vis
let type = a:type
let [start, end] = s:store_pos("'<", "'>")
silent exe "normal! `<" . a:type . "`>y"
elseif a:type == 'line'
let type = 'V'
let [start, end] = s:store_pos("'[", "']")
silent exe "normal! '[V']y"
elseif a:type == 'block'
let type = '\<C-V>'
let [start, end] = s:store_pos("'[", "']")
silent exe "normal! `[\<C-V>`]y"
else
let type = 'v'
let [start, end] = s:store_pos("'[", "']")
silent exe "normal! `[v`]y"
endif
let text = @@
let @@ = reg
let &selection = selection
return [text, type, start, end]
endfunction
function! s:store_pos(start, end)
return [getpos(a:start), getpos(a:end)]
endfunction
function! s:exchange_clear()
unlet! b:exchange_mode
unlet! b:exchange_start
unlet! b:exchange_end
unlet! b:exchange_text
unlet! b:exchange
endfunction
nnoremap <silent> <Plug>Exchange :<C-u>set opfunc=<SID>exchange_set<CR>g@