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function! remote#define#CommandOnHost(host, method, sync, name, opts)
let prefix = ''
if has_key(a:opts, 'range')
if a:opts.range == '' || a:opts.range == '%'
" -range or -range=%, pass the line range in a list
let prefix = '<line1>,<line2>'
elseif matchstr(a:opts.range, '\d') != ''
" -range=N, pass the count
let prefix = '<count>'
endif
elseif has_key(a:opts, 'count')
let prefix = '<count>'
endif
let forward_args = [prefix.a:name]
if has_key(a:opts, 'bang')
call add(forward_args, '<bang>')
endif
if has_key(a:opts, 'register')
call add(forward_args, ' <register>')
endif
if has_key(a:opts, 'nargs')
call add(forward_args, ' <args>')
endif
exe s:GetCommandPrefix(a:name, a:opts)
\ .' call remote#define#CommandBootstrap("'.a:host.'"'
\ . ', "'.a:method.'"'
\ . ', '.string(a:sync)
\ . ', "'.a:name.'"'
\ . ', '.string(a:opts).''
\ . ', "'.join(forward_args, '').'"'
\ . ')'
endfunction
function! remote#define#CommandBootstrap(host, method, sync, name, opts, forward)
let channel = remote#host#Require(a:host)
if channel
call remote#define#CommandOnChannel(channel, a:method, a:sync, a:name, a:opts)
exe a:forward
else
exe 'delcommand '.a:name
echoerr 'Host "'a:host.'" is not available, deleting command "'.a:name.'"'
endif
endfunction
function! remote#define#CommandOnChannel(channel, method, sync, name, opts)
let rpcargs = [a:channel, '"'.a:method.'"']
if has_key(a:opts, 'nargs')
" -nargs, pass arguments in a list
call add(rpcargs, '[<f-args>]')
endif
if has_key(a:opts, 'range')
if a:opts.range == '' || a:opts.range == '%'
" -range or -range=%, pass the line range in a list
call add(rpcargs, '[<line1>, <line2>]')
elseif matchstr(a:opts.range, '\d') != ''
" -range=N, pass the count
call add(rpcargs, '<count>')
endif
elseif has_key(a:opts, 'count')
" count
call add(rpcargs, '<count>')
endif
if has_key(a:opts, 'bang')
" bang
call add(rpcargs, '<q-bang> == "!"')
endif
if has_key(a:opts, 'register')
" register
call add(rpcargs, '<q-reg>')
endif
call s:AddEval(rpcargs, a:opts)
exe s:GetCommandPrefix(a:name, a:opts)
\ . ' call '.s:GetRpcFunction(a:sync).'('.join(rpcargs, ', ').')'
endfunction
function! remote#define#AutocmdOnHost(host, method, sync, name, opts)
let group = s:GetNextAutocmdGroup()
let forward = '"doau '.group.' '.a:name.' ".'.'expand("<amatch>")'
let a:opts.group = group
let bootstrap_def = s:GetAutocmdPrefix(a:name, a:opts)
\ .' call remote#define#AutocmdBootstrap("'.a:host.'"'
\ . ', "'.a:method.'"'
\ . ', '.string(a:sync)
\ . ', "'.a:name.'"'
\ . ', '.string(a:opts).''
\ . ', "'.escape(forward, '"').'"'
\ . ')'
exe bootstrap_def
endfunction
function! remote#define#AutocmdBootstrap(host, method, sync, name, opts, forward)
let channel = remote#host#Require(a:host)
exe 'autocmd! '.a:opts.group
if channel
call remote#define#AutocmdOnChannel(channel, a:method, a:sync, a:name,
\ a:opts)
exe eval(a:forward)
else
exe 'augroup! '.a:opts.group
echoerr 'Host "'a:host.'" for "'.a:name.'" autocmd is not available'
endif
endfunction
function! remote#define#AutocmdOnChannel(channel, method, sync, name, opts)
let rpcargs = [a:channel, '"'.a:method.'"']
call s:AddEval(rpcargs, a:opts)
let autocmd_def = s:GetAutocmdPrefix(a:name, a:opts)
\ . ' call '.s:GetRpcFunction(a:sync).'('.join(rpcargs, ', ').')'
exe autocmd_def
endfunction
function! remote#define#FunctionOnHost(host, method, sync, name, opts)
let group = s:GetNextAutocmdGroup()
exe 'autocmd! '.group.' FuncUndefined '.a:name
\ .' call remote#define#FunctionBootstrap("'.a:host.'"'
\ . ', "'.a:method.'"'
\ . ', '.string(a:sync)
\ . ', "'.a:name.'"'
\ . ', '.string(a:opts)
\ . ', "'.group.'"'
\ . ')'
endfunction
function! remote#define#FunctionBootstrap(host, method, sync, name, opts, group)
let channel = remote#host#Require(a:host)
exe 'autocmd! '.a:group
exe 'augroup! '.a:group
if channel
call remote#define#FunctionOnChannel(channel, a:method, a:sync, a:name,
\ a:opts)
else
echoerr 'Host "'a:host.'" for "'.a:name.'" function is not available'
endif
endfunction
function! remote#define#FunctionOnChannel(channel, method, sync, name, opts)
let rpcargs = [a:channel, '"'.a:method.'"', 'a:000']
if has_key(a:opts, 'range')
call add(rpcargs, '[a:firstline, a:lastline]')
endif
call s:AddEval(rpcargs, a:opts)
let function_def = s:GetFunctionPrefix(a:name, a:opts)
\ . 'return '.s:GetRpcFunction(a:sync).'('.join(rpcargs, ', ').')'
\ . "\nendfunction"
exe function_def
endfunction
function! s:GetRpcFunction(sync)
if a:sync
return 'rpcrequest'
endif
return 'rpcnotify'
endfunction
function! s:GetCommandPrefix(name, opts)
return 'command!'.s:StringifyOpts(a:opts, ['nargs', 'complete', 'range',
\ 'count', 'bang', 'bar', 'register']).' '.a:name
endfunction
" Each msgpack-rpc autocommand has it's own unique group, which is derived
" from an autoincrementing gid(group id). This is required for replacing the
" autocmd implementation with the lazy-load mechanism
let s:next_gid = 1
function! s:GetNextAutocmdGroup()
let gid = s:next_gid
let s:next_gid += 1
let group_name = 'RPC_DEFINE_AUTOCMD_GROUP_'.gid
" Ensure the group is defined
exe 'augroup '.group_name.' | augroup END'
return group_name
endfunction
function! s:GetAutocmdPrefix(name, opts)
if has_key(a:opts, 'group')
let group = a:opts.group
else
let group = s:GetNextAutocmdGroup()
endif
let rv = ['autocmd!', group, a:name]
if has_key(a:opts, 'pattern')
call add(rv, a:opts.pattern)
else
call add(rv, '*')
endif
if has_key(a:opts, 'nested') && a:opts.nested
call add(rv, 'nested')
endif
return join(rv, ' ')
endfunction
function! s:GetFunctionPrefix(name, opts)
let res = "function! ".a:name."(...)"
if has_key(a:opts, 'range')
let res = res." range"
endif
return res."\n"
endfunction
function! s:StringifyOpts(opts, keys)
let rv = []
for key in a:keys
if has_key(a:opts, key)
call add(rv, ' -'.key)
let val = a:opts[key]
if type(val) != type('') || val != ''
call add(rv, '='.val)
endif
endif
endfor
return join(rv, '')
endfunction
function! s:AddEval(rpcargs, opts)
if has_key(a:opts, 'eval')
if type(a:opts.eval) != type('') || a:opts.eval == ''
throw "Eval option must be a non-empty string"
endif
" evaluate an expression and pass as argument
call add(a:rpcargs, 'eval("'.escape(a:opts.eval, '"').'")')
endif
endfunction
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