lua: complete-word: use internal regex for splitting words

Internally vis supports unicode just fine. Instead of relying on
external programs utilize vis' own features.

Thanks to Florian Fischer for the correct regex!

1 files changed, 16 insertions, 2 deletions

diff --git a/lua/plugins/complete-word.lua b/lua/plugins/complete-word.lua
index 41d112c..7812751 100644
--- a/lua/plugins/complete-word.lua
+++ b/lua/plugins/complete-word.lua
@@ -5,18 +5,32 @@ vis:map(vis.modes.INSERT, "<C-n>", function()
 	local file = win.file
 	local pos = win.selection.pos
 	if not pos then return end
+
 	local range = file:text_object_word(pos > 0 and pos-1 or pos);
 	if not range then return end
 	if range.finish > pos then range.finish = pos end
 	if range.start == range.finish then return end
 	local prefix = file:content(range)
 	if not prefix then return end
-	local cmd = string.format("vis-complete --word '%s'", prefix:gsub("'", "'\\''"))
-	local status, out, err = vis:pipe(file, { start = 0, finish = file.size }, cmd)
+
+	vis:feedkeys("<vis-selections-save><Escape><Escape>")
+	-- collect words starting with prefix
+	vis:command("x/\\b" .. prefix .. "\\w+/")
+	local candidates = {}
+	for sel in win:selections_iterator() do
+		table.insert(candidates, file:content(sel.range))
+	end
+	vis:feedkeys("<Escape><Escape><vis-selections-restore>")
+	if #candidates == 1 and candidates[1] == "\n" then return end
+	candidates = table.concat(candidates, "\n")
+
+	local cmd = "printf '" .. candidates .. "' | sort -u | vis-menu"
+	local status, out, err = vis:pipe(cmd)
 	if status ~= 0 or not out then
 		if err then vis:info(err) end
 		return
 	end
+	out = out:sub(#prefix + 1, #out - 1)
 	file:insert(pos, out)
 	win.selection.pos = pos + #out
 end, "Complete word in file")