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Add some functions for sending LSP commands to a process, and automatically starting that process

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This commit is contained in:
w0rp 2017-05-13 00:12:12 +01:00
parent 204e3ca36b
commit d4466d4be7
2 changed files with 118 additions and 29 deletions
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9
autoload/ale/job.vim
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@ -215,6 +215,15 @@ function! ale#job#Start(command, options) abort
return l:job_id
endfunction
" Send raw data to the job.
function! ale#job#SendRaw(job_id, string) abort
if has('nvim')
call jobsend(a:job_id, a:string)
else
call ch_sendraw(job_getchannel(s:job_map[a:job_id]), a:string)
endif
endfunction
" Given a job ID, return 1 if the job is currently running.
" Invalid job IDs will be ignored.
function! ale#job#IsRunning(job_id) abort

138
autoload/ale/lsp.vim
View File

@ -1,9 +1,31 @@
" Author: w0rp <devw0rp@gmail.com>
" Description: Language Server Protocol client code
let s:address_info_map = {}
" A List of connections, used for tracking servers which have been connected
" to, and programs which are run.
let s:connections = []
let g:ale_lsp_next_message_id = 1
function! s:NewConnection() abort
" data: The message data received so far.
" callback_map: A mapping from connections to response callbacks.
" address: An address only set for server connections.
" executable: An executable only set for program connections.
" job: A job ID only set for running programs.
let l:conn = {
\ 'data': '',
\ 'callback_map': {},
\ 'address': '',
\ 'executable': '',
\ 'job_id': -1,
\}
call add(s:connections, l:conn)
return l:conn
endfunction
function! ale#lsp#GetNextMessageID() abort
" Use the current ID
let l:id = g:ale_lsp_next_message_id
@ -87,27 +109,87 @@ function! ale#lsp#ReadMessageData(data) abort
return [l:remainder, l:response_list]
endfunction
function! s:HandleMessage(channel, message) abort
let l:channel_info = ch_info(a:channel)
let l:address = l:channel_info.hostname . ':' . l:channel_info.port
let l:info = s:address_info_map[l:address]
let l:info.data .= a:message
function! ale#lsp#HandleMessage(conn, message) abort
let a:conn.data .= a:message
" Parse the objects now if we can, and keep the remaining text.
let [l:info.data, l:response_list] = ale#lsp#ReadMessageData(l:info.data)
let [a:conn.data, l:response_list] = ale#lsp#ReadMessageData(a:conn.data)
" Call our callbacks.
for l:response in l:response_list
let l:callback = l:info.callback_map.pop(l:response.id)
let l:callback = a:conn.callback_map.pop(l:response.id)
call ale#util#GetFunction(l:callback)(l:response)
endfor
endfunction
" Send a message to the server.
function! s:HandleChannelMessage(channel, message) abort
let l:info = ch_info(a:channel)
let l:address = l:info.hostname . l:info.address
let l:conn = filter(s:connections[:], 'v:val.address ==# l:address')[0]
call ale#lsp#HandleMessage(l:conn, a:message)
endfunction
function! s:HandleCommandMessage(job_id, message) abort
let l:conn = filter(s:connections[:], 'v:val.job_id == a:job_id')[0]
call ale#lsp#HandleMessage(l:conn, a:message)
endfunction
" Send a message to a server with a given executable, and a command for
" running the executable.
"
" A callback can be registered to handle the response.
" Notifications do not need to be handled.
" (executable, command, message, callback?)
"
" Returns 1 when a message is sent, 0 otherwise.
function! ale#lsp#SendMessageToProgram(executable, command, message, ...) abort
if a:0 > 1
throw 'Too many arguments!'
endif
if !a:message[0] && a:0 == 0
throw 'A callback must be set for messages which are not notifications!'
endif
if !executable(a:executable)
return 0
endif
let [l:id, l:data] = ale#lsp#CreateMessageData(a:message)
let l:matches = filter(s:connections[:], 'v:val.executable ==# a:executable')
if empty(l:matches)
" We haven't looked at this executable before.
" Create a new connection.
let l:conn = NewConnection()
endif
if !ale#job#IsRunning(l:conn.job_id)
let l:options = {'mode': 'raw', 'out_cb': 's:HandleCommandMessage'}
let l:job_id = ale#job#Start(ale#job#PrepareCommand(a:command), l:options)
endif
if l:job_id > 0
return 0
endif
call ale#job#SendRaw(l:job_id, l:data)
let l:conn.job_id = l:job_id
return 1
endfunction
" Send a message to a server at a given address.
" A callback can be registered to handle the response.
" Notifications do not need to be handled.
" (address, message, callback?)
function! ale#lsp#SendMessage(address, message, ...) abort
"
" Returns 1 when a message is sent, 0 otherwise.
function! ale#lsp#SendMessageToAddress(address, message, ...) abort
if a:0 > 1
throw 'Too many arguments!'
endif
@ -118,35 +200,33 @@ function! ale#lsp#SendMessage(address, message, ...) abort
let [l:id, l:data] = ale#lsp#CreateMessageData(a:message)
let l:info = get(s:address_info_map, a:address, {})
let l:matches = filter(s:connections[:], 'v:val.address ==# a:address')
if empty(l:info)
let l:info = {
\ 'data': '',
\ 'callback_map': {},
\}
let s:address_info_map[a:address] = l:info
if empty(l:matches)
" We haven't looked at this address before.
" Create a new connection.
let l:conn = NewConnection()
endif
if !has_key(l:conn, 'channel') || ch_status(l:conn.channel) !=# 'open'
let l:conn.channnel = ch_open(a:address, {
\ 'mode': 'raw',
\ 'waittime': 0,
\ 'callback': 's:HandleChannelMessage',
\})
endif
" The ID is 0 when the message is a Notification, which is a JSON-RPC
" request for which the server must not return a response.
if l:id != 0
" Add the callback, which the server will respond to later.
let l:info.callback_map[l:id] = a:1
let l:conn.callback_map[l:id] = a:1
endif
if !has_key(l:info, 'channel') || ch_status(l:info.channel) !=# 'open'
let l:info.channnel = ch_open(a:address, {
\ 'mode': 'raw',
\ 'waittime': 0,
\ 'callback': 's:HandleMessage',
\})
endif
if ch_status(l:info.channnel) ==# 'fail'
throw 'Failed to open channel for: ' . a:address
if ch_status(l:conn.channnel) ==# 'fail'
return 0
endif
" Send the message to the server
call ch_sendraw(l:info.channel, l:data)
call ch_sendraw(l:conn.channel, l:data)
endfunction