Add "expand" functionality
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.
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@ -19,12 +19,14 @@ Like `cx`, but use the current line.
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Clear any {motion} pending for exchange.
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### Notes about the mappings
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### Some notes
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* `X` can be used from visual mode, which is sometimes easier than coming
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up with the right {motion}
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* If you're using the same motion again (e.g. exchanging two words using
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`cxiw`), you can use `.` the second time.
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* If one region is fully contained within the other, it will replace the
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containing region.
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Example
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-------
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@ -8,9 +8,10 @@ This plugin is only available if 'compatible' is not set.
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INTRODUCTION *exchange*
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This plugin provides |operators| for exchanging text in two places. The main
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operator is |cx|, which is used in pairs. Each time it is used, it defines
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a region of text to to be exchanged; on the second use, the two defined regions
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are exchanged.
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operator is |cx|, which is used in pairs. Each time it is used, it defines a
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region of text to to be exchanged; on the second use, the two defined regions
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are exchanged. If one region is fully contained within the other, it replaces
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the containing region.
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MAPPINGS *exchange-mappings*
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@ -1,4 +1,4 @@
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function! s:exchange(x, y, reverse)
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function! s:exchange(x, y, reverse, expand)
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let reg_z = getreg('z')
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let reg_z_mode = getregtype('z')
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let reg_unnamed = getreg('"')
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@ -11,10 +11,12 @@ function! s:exchange(x, y, reverse)
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call setreg('z', a:x[0], a:x[1])
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silent exe "normal! `[" . a:y[1] . "`]\"zp"
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call setpos("'[", a:x[2])
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call setpos("']", a:x[3])
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call setreg('z', a:y[0], a:y[1])
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silent exe "normal! `[" . a:x[1] . "`]\"zp"
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if !a:expand
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call setpos("'[", a:x[2])
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call setpos("']", a:x[3])
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call setreg('z', a:y[0], a:y[1])
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silent exe "normal! `[" . a:x[1] . "`]\"zp"
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endif
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if a:reverse
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call cursor(a:x[2][1], a:x[2][2])
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@ -63,17 +65,23 @@ function! s:exchange_set(type, ...)
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let exchange1 = b:exchange
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let exchange2 = s:exchange_get(a:type, a:0)
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let reverse = 0
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let expand = 0
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let cmp = s:compare(exchange1, exchange2)
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if cmp == 'overlap'
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echohl WarningMsg | echo "Exchange aborted: overlapping text" | echohl None
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return s:exchange_clear()
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elseif cmp == 'outer'
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let [expand, reverse] = [1, 1]
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let [exchange1, exchange2] = [exchange2, exchange1]
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elseif cmp == 'inner'
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let expand = 1
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elseif cmp == 'gt'
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let reverse = 1
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let [exchange1, exchange2] = [exchange2, exchange1]
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endif
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call s:exchange(exchange1, exchange2, reverse)
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call s:exchange(exchange1, exchange2, reverse, expand)
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call s:exchange_clear()
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endif
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endfunction
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@ -143,7 +151,11 @@ function! s:compare(x, y)
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" When the characterwise region spans only one line, it is like blockwise.
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" Compare two linewise or characterwise regions.
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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)
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if s:compare_pos(xs, ys) <= 0 && s:compare_pos(xe, ye) >= 0
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return 'outer'
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elseif s:compare_pos(ys, xs) <= 0 && s:compare_pos(ye, xe) >= 0
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return 'inner'
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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)
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" x and y overlap in buffer.
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return 'overlap'
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endif
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