Simplify osc52 code.

config/nvim/lua/osc52.lua

@@ -5,31 +5,19 @@ local M = {}
 local base64 = {}
 local max_osc52_sequence = 100000
 
-function M.get_OSC52(str, tgt)
+local function osc52_copy(str, tgt)
   return "\x1b]52;" .. tgt .. ";" .. base64.encode(str) .. "\x07"
 end
 
--- This is for `tmux` sessions which filters OSC 52 locally.
-function M.get_OSC52_tmux(str, tgt)
-  return "\x1bPtmux;\x1b\x1b]52;" .. tgt .. ";" .. base64.encode(str) .. "\x07\x1b\\"
+local function tmux_wrap(cmd)
+  return "\x1bPtmux;\x1b" .. cmd .. "\x1b\\"
 end
 
--- base64s the entire source, wraps it in a single OSC52, and then
--- breaks the result in small chunks which are each wrapped in a DCS sequence.
---
--- This is appropriate when running on `screen`.  Screen doesn't support OSC 52,
--- but will pass the contents of a DCS sequence to the outer terminal unmolested.
--- It imposes a small max length to DCS sequences, so we send in chunks.
-function M.get_OSC52_DCS(str, tgt)
-  local b64 = base64.encode(str)
-
+local function screen_wrap(cmd)
   -- Insert <end-dcs><start-dcs> pair every 76 characters.
   -- TODO: insert "\x1b\\\x1bP" every 76 characters
 
-  -- Now wrap the whole thing in <start-dcs><start-osc52>...<end-osc52><end-dcs>.
-  b64 = "\x1bP\x1b]52;" .. tgt .. ";" .. b64 .. "\x07\x1b\x5c"
-
-  return b64
+  return "\x1bP" .. cmd .. "\x1b\x5c"
 end
 
 M.terminal = vim.api.nvim_eval'$TERM'
@@ -39,13 +27,11 @@ function M.copy(str, tgt)
 
   if #str > max_osc52_sequence then error'string to long to copy via OSC52' end
 
-  local osc52
+  local osc52 = osc52_copy(str, tgt)
   if M.terminal:match'^tmux' ~= nil then
-    osc52 = M.get_OSC52_tmux(str, tgt)
+    osc52 = tmux_wrap(osc52)
   elseif M.terminal:match'^screen' ~= nil then
-    osc52 = M.get_OSC52_DCS(str, tgt)
-  else
-    osc52 = M.get_OSC52(str, tgt)
+    osc52 = screen_wrap(osc52)
   end
 
   io.stdout:write(osc52)
@@ -64,8 +50,8 @@ function M.enable()
     \   '*': { lines, regtype -> v:lua.osc52_clipboard_handler(lines, regtype, '*') },
     \ },
     \ 'paste': {
-    \   '+': { -> '' },
-    \   '*': { -> '' },
+    \   '+': { -> [] },
+    \   '*': { -> [] },
     \ },
     \}
   ]]

vimrc

@@ -152,7 +152,7 @@ set backupcopy=yes
 
 se inccommand=nosplit
 
-set mouse=a
+set mouse=nv
 set title
 
 se scl=yes:1 " say no to wobbly side column