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Detect overlap for two blockwise regions

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Tom McDonald 2013-12-12 15:12:14 -05:00
parent ec7f183583
commit fba5bcea8c
1 changed files with 22 additions and 0 deletions
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22
plugin/exchange.vim
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@ -79,6 +79,20 @@ function! s:compare(x, y)
let xe = s:apply_mode(xe, xm)
let ye = s:apply_mode(ye, ym)
" Compare two blockwise regions.
if xm == "\<C-V>" && ym == "\<C-V>"
if s:intersects(xs, xe, ys, ye)
return 0
endif
let cmp = xs[2] - ys[2]
return cmp == 0 ? -1 : cmp
endif
" TODO: Compare a blockwise region with a linewise or characterwise region.
" NOTE: Comparing blockwise with characterwise has one exception:
" 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)
" x and y overlap in buffer.
return 0
@ -95,6 +109,14 @@ function! s:compare_pos(x, y)
endif
endfunction
function! s:intersects(xs, xe, ys, ye)
if a:xe[2] < a:ys[2] || a:xe[1] < a:ys[1] || a:xs[2] > a:ye[2] || a:xs[1] > a:ye[1]
return 0
else
return 1
endif
endfunction
function! s:apply_mode(pos, mode)
let pos = a:pos
if a:mode ==# 'V'