vim-airline/autoload/airline/extensions/windowswap.vim

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" MIT License. Copyright (c) 2013-2018 Bailey Ling et al.
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" vim: et ts=2 sts=2 sw=2
scriptencoding utf-8
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if !exists('g:loaded_windowswap')
finish
endif
let s:spc = g:airline_symbols.space
if !exists('g:airline#extensions#windowswap#indicator_text')
let g:airline#extensions#windowswap#indicator_text = 'WS'
endif
function! airline#extensions#windowswap#init(ext)
call airline#parts#define_function('windowswap', 'airline#extensions#windowswap#get_status')
endfunction
function! airline#extensions#windowswap#get_status()
" use new tab-aware api if WS is up to date
let s:mark = exists('*WindowSwap#IsCurrentWindowMarked') ?
\WindowSwap#IsCurrentWindowMarked() :
\(WindowSwap#HasMarkedWindow() && WindowSwap#GetMarkedWindowNum() == winnr())
if s:mark
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return g:airline#extensions#windowswap#indicator_text.s:spc
endif
return ''
endfunction