neovim
diff --git a/‎runtime/lua/vim/lsp.lua
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+15-17Lines changed: 15 additions & 17 deletions b/‎runtime/lua/vim/lsp.lua
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+15-17Lines changed: 15 additions & 17 deletions
@@ -5,6 +5,7 @@ local log = require 'vim.lsp.log'
 local lsp_rpc = require 'vim.lsp.rpc'
 local protocol = require 'vim.lsp.protocol'
 local util = require 'vim.lsp.util'
+local sync = require 'vim.lsp.sync'
 
 local vim = vim
 local nvim_err_writeln, nvim_buf_get_lines, nvim_command, nvim_buf_get_option
@@ -108,6 +109,12 @@ local valid_encodings = {
   UTF8      = 'utf-8'; UTF16      = 'utf-16'; UTF32      = 'utf-32';
 }
 
+local format_line_ending = {
+  ["unix"] = '\n',
+  ["dos"] = '\r\n',
+  ["mac"] = '\r',
+}
+
 local client_index = 0
 ---@private
 --- Returns a new, unused client id.
@@ -351,15 +358,14 @@ do
     end
   end
 
-  function changetracking.prepare(bufnr, firstline, new_lastline, changedtick)
+  function changetracking.prepare(bufnr, firstline, lastline, new_lastline, changedtick)
     local incremental_changes = function(client)
       local cached_buffers = state_by_client[client.id].buffers
-      local lines = nvim_buf_get_lines(bufnr, 0, -1, true)
-      local startline =  math.min(firstline + 1, math.min(#cached_buffers[bufnr], #lines))
-      local endline =  math.min(-(#lines - new_lastline), -1)
-      local incremental_change = vim.lsp.util.compute_diff(
-        cached_buffers[bufnr], lines, startline, endline, client.offset_encoding or 'utf-16')
-      cached_buffers[bufnr] = lines
+      local curr_lines = nvim_buf_get_lines(bufnr, 0, -1, true)
+      local line_ending = format_line_ending[vim.api.nvim_buf_get_option(0, 'fileformat')]
+      local incremental_change = sync.compute_diff(
+        cached_buffers[bufnr], curr_lines, firstline, lastline, new_lastline, client.offset_encoding or 'utf-16', line_ending or '\n')
+      cached_buffers[bufnr] = curr_lines
       return incremental_change
     end
     local full_changes = once(function()
@@ -1067,22 +1073,14 @@ end
 --- Notify all attached clients that a buffer has changed.
 local text_document_did_change_handler
 do
-  text_document_did_change_handler = function(_, bufnr, changedtick,
-      firstline, lastline, new_lastline, old_byte_size, old_utf32_size,
-      old_utf16_size)
-
-    local _ = log.debug() and log.debug(
-      string.format("on_lines bufnr: %s, changedtick: %s, firstline: %s, lastline: %s, new_lastline: %s, old_byte_size: %s, old_utf32_size: %s, old_utf16_size: %s",
-      bufnr, changedtick, firstline, lastline, new_lastline, old_byte_size, old_utf32_size, old_utf16_size),
-      nvim_buf_get_lines(bufnr, firstline, new_lastline, true)
-    )
+  text_document_did_change_handler = function(_, bufnr, changedtick, firstline, lastline, new_lastline)
 
     -- Don't do anything if there are no clients attached.
     if tbl_isempty(all_buffer_active_clients[bufnr] or {}) then
       return
     end
     util.buf_versions[bufnr] = changedtick
-    local compute_change_and_notify = changetracking.prepare(bufnr, firstline, new_lastline, changedtick)
+    local compute_change_and_notify = changetracking.prepare(bufnr, firstline, lastline, new_lastline, changedtick)
     for_each_buffer_client(bufnr, compute_change_and_notify)
   end
 end