From 558c1bd7733af1b7c76f007d384030772d39c204 Mon Sep 17 00:00:00 2001
From: Takase <20792268+takase1121@users.noreply.github.com>
Date: Sun, 24 Oct 2021 14:41:21 +0800
Subject: fix open_ext.lua once and for all

---
 plugins/open_ext.lua | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

(limited to 'plugins/open_ext.lua')

diff --git a/plugins/open_ext.lua b/plugins/open_ext.lua
index 96532c7..0c7eff1 100644
--- a/plugins/open_ext.lua
+++ b/plugins/open_ext.lua
@@ -138,18 +138,19 @@ function OpenExtView:draw()
 end
 
 
-local function read_doc(doc, limit)
-  if not doc.abs_filename return "" end
-  local f = io.open(doc.abs_filename)
-  local str = f:read(limit)
+local function validate_doc(doc)
+  local f = io.open(doc.abs_filename or "")
+  if not f then return true end
+  local str = f:read(128 * 4) -- max bytes for 128 codepoints
   f:close()
-  return str
+  return validate_utf8(str, 128)
 end
 
+
 local rootview_open_doc = RootView.open_doc
 function RootView:open_doc(doc)
-  local str = read_doc(doc, 128 * 4) -- max bytes for 128 codepoints
-  if validate_utf8(str, 128) then
+  -- 128 * 4 == max number of bytes for 128 codepoints
+  if validate_doc(doc) then
     return rootview_open_doc(self, doc)
   else
     local node = self:get_active_node_default()
-- 
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