vim/vim-exchange
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Add "expand" functionality

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When one exchange region is completely contained within another,
replace the larger one with the smaller one.

The term "expand" may seem counter-intuitive, as the result is less
text, but think of it this way: the smaller region is "expanding"
to occupy the space previously defined by the larger region.
This commit is contained in:
Tom McDonald 2014-04-27 10:21:27 -04:00
parent a55ebe1c8d
commit 72d9f0a3cf
3 changed files with 26 additions and 11 deletions
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4
README.md
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@ -19,12 +19,14 @@ Like `cx`, but use the current line.
Clear any {motion} pending for exchange.
### Notes about the mappings
### Some notes
* `X` can be used from visual mode, which is sometimes easier than coming
up with the right {motion}
* If you're using the same motion again (e.g. exchanging two words using
`cxiw`), you can use `.` the second time.
* If one region is fully contained within the other, it will replace the
containing region.
Example
-------

7
doc/exchange.txt
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@ -8,9 +8,10 @@ This plugin is only available if 'compatible' is not set.
INTRODUCTION *exchange*
This plugin provides |operators| for exchanging text in two places. The main
operator is |cx|, which is used in pairs. Each time it is used, it defines
a region of text to to be exchanged; on the second use, the two defined regions
are exchanged.
operator is |cx|, which is used in pairs. Each time it is used, it defines a
region of text to to be exchanged; on the second use, the two defined regions
are exchanged. If one region is fully contained within the other, it replaces
the containing region.
MAPPINGS *exchange-mappings*

18
plugin/exchange.vim
View File

@ -1,4 +1,4 @@
function! s:exchange(x, y, reverse)
function! s:exchange(x, y, reverse, expand)
let reg_z = getreg('z')
let reg_z_mode = getregtype('z')
let reg_unnamed = getreg('"')
@ -11,10 +11,12 @@ function! s:exchange(x, y, reverse)
call setreg('z', a:x[0], a:x[1])
silent exe "normal! `[" . a:y[1] . "`]\"zp"
if !a:expand
call setpos("'[", a:x[2])
call setpos("']", a:x[3])
call setreg('z', a:y[0], a:y[1])
silent exe "normal! `[" . a:x[1] . "`]\"zp"
endif
if a:reverse
call cursor(a:x[2][1], a:x[2][2])
@ -63,17 +65,23 @@ function! s:exchange_set(type, ...)
let exchange1 = b:exchange
let exchange2 = s:exchange_get(a:type, a:0)
let reverse = 0
let expand = 0
let cmp = s:compare(exchange1, exchange2)
if cmp == 'overlap'
echohl WarningMsg | echo "Exchange aborted: overlapping text" | echohl None
return s:exchange_clear()
elseif cmp == 'outer'
let [expand, reverse] = [1, 1]
let [exchange1, exchange2] = [exchange2, exchange1]
elseif cmp == 'inner'
let expand = 1
elseif cmp == 'gt'
let reverse = 1
let [exchange1, exchange2] = [exchange2, exchange1]
endif
call s:exchange(exchange1, exchange2, reverse)
call s:exchange(exchange1, exchange2, reverse, expand)
call s:exchange_clear()
endif
endfunction
@ -143,7 +151,11 @@ function! s:compare(x, y)
" When the characterwise region spans only one line, it is like blockwise.
" Compare two linewise or characterwise regions.
if (s:compare_pos(xs, ye) <= 0 && s:compare_pos(ys, xe) <= 0) || (s:compare_pos(ys, xe) <= 0 && s:compare_pos(xs, ye) <= 0)
if s:compare_pos(xs, ys) <= 0 && s:compare_pos(xe, ye) >= 0
return 'outer'
elseif s:compare_pos(ys, xs) <= 0 && s:compare_pos(ye, xe) >= 0
return 'inner'
elseif (s:compare_pos(xs, ye) <= 0 && s:compare_pos(ys, xe) <= 0) || (s:compare_pos(ys, xe) <= 0 && s:compare_pos(xs, ye) <= 0)
" x and y overlap in buffer.
return 'overlap'
endif