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lsp: add incremental text synchronization

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* Implementation derived from and validated by vim-lsc authored by Nate
  Bosch
This commit is contained in:
Michael Lingelbach
2021-03-07 17:18:32 -08:00
parent c12ea02e0b
commit e4e51c69d7
6 changed files with 203 additions and 31 deletions
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34
runtime/lua/vim/lsp.lua
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@@ -262,6 +262,13 @@ end
--@param bufnr (Number) Number of the buffer, or 0 for current
--@param client Client object
local function text_document_did_open_handler(bufnr, client)
local allow_incremental_sync = if_nil(client.config.flags.allow_incremental_sync, false)
if allow_incremental_sync then
if not client._cached_buffers then
client._cached_buffers = {}
end
client._cached_buffers[bufnr] = nvim_buf_get_lines(bufnr, 0, -1, true)
end
if not client.resolved_capabilities.text_document_open_close then
return
end
@@ -808,7 +815,6 @@ end
--- Notify all attached clients that a buffer has changed.
local text_document_did_change_handler
do
local encoding_index = { ["utf-8"] = 1; ["utf-16"] = 2; ["utf-32"] = 3; }
text_document_did_change_handler = function(_, bufnr, changedtick,
firstline, lastline, new_lastline, old_byte_size, old_utf32_size,
old_utf16_size)
@@ -827,23 +833,12 @@ do
util.buf_versions[bufnr] = changedtick
-- Lazy initialize these because clients may not even need them.
local incremental_changes = once(function(client)
local size_index = encoding_index[client.offset_encoding]
local length = select(size_index, old_byte_size, old_utf16_size, old_utf32_size)
local lines = nvim_buf_get_lines(bufnr, firstline, new_lastline, true)
-- This is necessary because we are specifying the full line including the
-- newline in range. Therefore, we must replace the newline as well.
if #lines > 0 then
table.insert(lines, '')
end
return {
range = {
start = { line = firstline, character = 0 };
["end"] = { line = lastline, character = 0 };
};
rangeLength = length;
text = table.concat(lines, '\n');
};
local lines = nvim_buf_get_lines(bufnr, 0, -1, true)
local startline = math.min(firstline + 1, math.min(#client._cached_buffers[bufnr], #lines))
local endline = math.min(-(#lines - new_lastline), 0)
local incremental_change = vim.lsp.util.compute_diff(client._cached_buffers[bufnr], lines, startline, endline)
client._cached_buffers[bufnr] = lines
return incremental_change
end)
local full_changes = once(function()
return {
@@ -931,6 +926,9 @@ function lsp.buf_attach_client(bufnr, client_id)
if client.resolved_capabilities.text_document_open_close then
client.notify('textDocument/didClose', params)
end
if client._cached_buffers then
client._cached_buffers[bufnr] = nil
end
end)
util.buf_versions[bufnr] = nil
all_buffer_active_clients[bufnr] = nil