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local source = {}
source.new = function(client)
local self = setmetatable({}, { __index = source })
self.client = client
self.request_ids = {}
return self
end
source.get_debug_name = function(self)
return table.concat({ 'nvim_lsp', self.client.name }, ':')
end
source.is_available = function(self)
-- client is stopped.
if self.client.is_stopped() then
return false
end
-- client is not attached to current buffer.
if not vim.lsp.buf_get_clients(vim.api.nvim_get_current_buf())[self.client.id] then
return false
end
-- client has no completion capability.
if not self:_get(self.client.server_capabilities, { 'completionProvider' }) then
return false
end
return true;
end
source.get_trigger_characters = function(self)
return self:_get(self.client.server_capabilities, { 'completionProvider', 'triggerCharacters' }) or {}
end
source.complete = function(self, request, callback)
local params = vim.lsp.util.make_position_params(0, self.client.offset_encoding)
params.context = {}
params.context.triggerKind = request.completion_context.triggerKind
params.context.triggerCharacter = request.completion_context.triggerCharacter
self:_request('textDocument/completion', params, function(_, response)
callback(response)
end)
end
source.resolve = function(self, completion_item, callback)
-- client is stopped.
if self.client.is_stopped() then
return callback()
end
-- client has no completion capability.
if not self:_get(self.client.server_capabilities, { 'completionProvider', 'resolveProvider' }) then
return callback()
end
self:_request('completionItem/resolve', completion_item, function(_, response)
callback(response or completion_item)
end)
end
source.execute = function(self, completion_item, callback)
-- client is stopped.
if self.client.is_stopped() then
return callback()
end
-- completion_item has no command.
if not completion_item.command then
return callback()
end
self:_request('workspace/executeCommand', completion_item.command, function(_, _)
callback()
end)
end
source._get = function(_, root, paths)
local c = root
for _, path in ipairs(paths) do
c = c[path]
if not c then
return nil
end
end
return c
end
source._request = function(self, method, params, callback)
if self.request_ids[method] ~= nil then
self.client.cancel_request(self.request_ids[method])
self.request_ids[method] = nil
end
local _, request_id
_, request_id = self.client.request(method, params, function(arg1, arg2, arg3)
if self.request_ids[method] ~= request_id then
return
end
self.request_ids[method] = nil
-- Text changed, retry
if arg1 and arg1.code == -32801 then
self:_request(method, params, callback)
return
end
if method == arg2 then
callback(arg1, arg3) -- old signature
else
callback(arg1, arg2) -- new signature
end
end)
self.request_ids[method] = request_id
end
return source
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