Iterate multibyte editor characters incrementally

1 files changed, 9 insertions, 6 deletions

diff --git a/lua/clever_f/text_topology.lua b/lua/clever_f/text_topology.lua
index 6afbc26..db4ea3b 100644
--- a/lua/clever_f/text_topology.lua
+++ b/lua/clever_f/text_topology.lua
@@ -113,14 +113,17 @@ local function nvim_split_segment(segment, result)
     return
   end
 
-  local count = vim.fn.strchars(segment, true)
-  for character_index = 0, count - 1 do
-    local first = vim.fn.byteidx(segment, character_index)
-    local following = vim.fn.byteidx(segment, character_index + 1)
-    if first < 0 or following <= first then
+  local offset = 0
+  while offset < #segment do
+    local match = vim.fn.matchstrpos(segment, "\\m.", offset)
+    local character = match[1]
+    local first = match[2]
+    local following = match[3]
+    if first ~= offset or following <= first or character == "" then
       fail("Nvim could not index an editor character", 3)
     end
-    result[#result + 1] = segment:sub(first + 1, following)
+    result[#result + 1] = character
+    offset = following
   end
 end