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Improve setup of mappings #50

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Improve setup of mappings #50

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aea541a
Prefer remapping of `<Plug>` over `<CR>`
blueyed Feb 3, 2014
1365089
Only call `maparg` once
blueyed Feb 3, 2014
bc75562
Use `<unique>` maps, catch already-exists error and provide help
blueyed Feb 3, 2014
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32 changes: 23 additions & 9 deletions plugin/endwise.vim
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Original file line number Diff line number Diff line change
Expand Up @@ -61,17 +61,31 @@ if maparg("<Plug>DiscretionaryEnd") == ""
endif

if !exists('g:endwise_no_mappings')
if maparg('<CR>','i') =~# '<C-R>=.*crend(.)<CR>\|<\%(Plug\|SNR\|SID\)>.*End'
let maparg = maparg('<CR>', 'i')
if maparg =~# '<C-R>=.*crend(.)<CR>\|<\%(Plug\|SNR\|SID\)>.*End'
" Already mapped
elseif maparg('<CR>','i') =~ '<CR>'
exe "imap <script> <C-X><CR> ".maparg('<CR>','i')."<SID>AlwaysEnd"
exe "imap <script> <CR> ".maparg('<CR>','i')."<SID>DiscretionaryEnd"
elseif maparg('<CR>','i') =~ '<Plug>\w\+CR'
exe "imap <C-X><CR> ".maparg('<CR>', 'i')."<Plug>AlwaysEnd"
exe "imap <CR> ".maparg('<CR>', 'i')."<Plug>DiscretionaryEnd"
elseif maparg =~ '<Plug>\w\+CR'
exe "imap <C-X><CR> ".maparg."<Plug>AlwaysEnd"
exe "imap <CR> ".maparg."<Plug>DiscretionaryEnd"
elseif maparg =~ '<CR>'
exe "imap <script> <C-X><CR> ".maparg."<SID>AlwaysEnd"
exe "imap <script> <CR> ".maparg."<SID>DiscretionaryEnd"
else
imap <C-X><CR> <CR><Plug>AlwaysEnd
imap <CR> <CR><Plug>DiscretionaryEnd
" Use <unique> to get a warning, if user maps would get overwritten,
" then catch the error and provide help to fix it.
for m in [
\ 'imap <unique> <C-X><CR> <CR><Plug>AlwaysEnd',
\ 'imap <unique> <CR> <CR><Plug>DiscretionaryEnd']
try
exec m
catch /^Vim\%((\a\+)\)\=:E227/ " E227: mapping already exists for ^X^M
let exception_msg = substitute(v:exception, '^\S\+: ', '', '')
echohl WarningMsg
echom 'endwise: not overwriting existing map ('.exception_msg.').'
\ 'Set g:endwise_no_mappings=1 to skip setup of mappings.'
echohl None
endtry
endfor
endif
endif

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