From 79ee757757cfe5d88aa3bd647c09ccd2c374272b Mon Sep 17 00:00:00 2001
From: Zachary Yedidia <zyedidia@gmail.com>
Date: Mon, 8 Jun 2020 13:54:31 -0400
Subject: [PATCH] Only start autocompletion for alphanumerics

Ref #1712
---
 internal/action/actions.go | 7 ++++++-
 internal/util/util.go      | 4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/internal/action/actions.go b/internal/action/actions.go
index 6f2f0940..9cff5de3 100644
--- a/internal/action/actions.go
+++ b/internal/action/actions.go
@@ -663,7 +663,12 @@ func (h *BufPane) Autocomplete() bool {
 		return false
 	}
 
-	if !util.IsNonAlphaNumeric(h.Cursor.RuneUnder(h.Cursor.X)) {
+	if h.Cursor.X == 0 {
+		return false
+	}
+	r := h.Cursor.RuneUnder(h.Cursor.X)
+	prev := h.Cursor.RuneUnder(h.Cursor.X - 1)
+	if !util.IsAutocomplete(prev) || !util.IsNonAlphaNumeric(r) {
 		// don't autocomplete if cursor is on alpha numeric character (middle of a word)
 		return false
 	}
diff --git a/internal/util/util.go b/internal/util/util.go
index a63a3518..8b867ca0 100644
--- a/internal/util/util.go
+++ b/internal/util/util.go
@@ -418,6 +418,10 @@ func IsNonAlphaNumeric(c rune) bool {
 	return !unicode.IsLetter(c) && !unicode.IsNumber(c) && c != '_'
 }
 
+func IsAutocomplete(c rune) bool {
+	return c == '.' || !IsNonAlphaNumeric(c)
+}
+
 func ParseSpecial(s string) string {
 	return strings.Replace(s, "\\t", "\t", -1)
 }