feat(suggestion): notify accepted length

Author: MunifTanjim

lua/copilot/api.lua

@@ -97,7 +97,7 @@ function mod.get_version(client, callback)
   return mod.request(client, "getVersion", {}, callback)
 end
 
----@alias copilot_notify_accepted_params { uuid: string }
+---@alias copilot_notify_accepted_params { uuid: string, acceptedLength?: integer }
 
 ---@param params copilot_notify_accepted_params
 function mod.notify_accepted(client, params, callback)

lua/copilot/suggestion.lua

@@ -453,21 +453,20 @@ function mod.accept(modifier)
   cancel_inflight_requests(ctx)
   reset_ctx(ctx)
 
-  with_client(function(client)
-    if modifier then
-      -- do not notify_accepted for partial accept.
-      -- revisit if upstream copilot.vim adds this feature.
-      return
-    end
-
-    api.notify_accepted(client, { uuid = suggestion.uuid }, function() end)
-  end)
-  clear_preview()
-
   if type(modifier) == "function" then
     suggestion = modifier(suggestion)
   end
 
+  with_client(function(client)
+    api.notify_accepted(
+      client,
+      { uuid = suggestion.uuid, acceptedLength = util.strutf16len(suggestion.text) },
+      function() end
+    )
+  end)
+
+  clear_preview()
+
   local range, newText = suggestion.range, suggestion.text
 
   -- Hack for 'autoindent', makes the indent persist. Check `:help 'autoindent'`.

lua/copilot/util.lua

@@ -294,4 +294,14 @@ M.auth = function()
   require("copilot.auth").signin()
 end
 
+---@param str string
+---@return integer
+function M.strutf16len(str)
+  return vim.fn.strchars(vim.fn.substitute(str, [==[\\%#=2[^\u0001-\uffff]]==], "  ", "g"))
+end
+
+if vim.fn.strutf16len then
+  M.strutf16len = vim.fn.strutf16len
+end
+
 return M