From b377c39d0e893c1ca73163e663a3220a6d4e4f36 Mon Sep 17 00:00:00 2001
From: Eric Freese <ericdfreese@gmail.com>
Date: Sun, 31 Jul 2016 20:10:22 -0600
Subject: [PATCH] Only fetch a new suggestion if buffer has changed

---
 README.md               |  2 +-
 src/widgets.zsh         | 12 +++++++++++-
 zsh-autosuggestions.zsh | 12 +++++++++++-
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index e419134..3a5c3f3 100644
--- a/README.md
+++ b/README.md
@@ -82,7 +82,7 @@ This plugin works by triggering custom behavior when certain [zle widgets](http:
 - `ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS`: Widgets in this array will partially accept the suggestion when invoked.
 - `ZSH_AUTOSUGGEST_IGNORE_WIDGETS`: Widgets in this array will not trigger any custom behavior.
 
-Widgets not in any of these lists will update the suggestion when invoked.
+Widgets that modify the buffer and are not found in any of these arrays will fetch a new suggestion after they are invoked.
 
 **Note:** A widget shouldn't belong to more than one of the above arrays.
 
diff --git a/src/widgets.zsh b/src/widgets.zsh
index 9e0b568..57f378e 100644
--- a/src/widgets.zsh
+++ b/src/widgets.zsh
@@ -15,13 +15,23 @@ _zsh_autosuggest_clear() {
 _zsh_autosuggest_modify() {
 	local -i retval
 
+	# Save the contents of the buffer/postdisplay
+	local orig_buffer="$BUFFER"
+	local orig_postdisplay="$POSTDISPLAY"
+
 	# Clear suggestion while original widget runs
 	unset POSTDISPLAY
 
-	# Original widget modifies the buffer
+	# Original widget may modify the buffer
 	_zsh_autosuggest_invoke_original_widget $@
 	retval=$?
 
+	# Don't fetch a new suggestion if the buffer hasn't changed
+	if [ "$BUFFER" = "$orig_buffer" ]; then
+		POSTDISPLAY="$orig_postdisplay"
+		return $retval
+	fi
+
 	# Get a new suggestion if the buffer is not empty after modification
 	local suggestion
 	if [ $#BUFFER -gt 0 ]; then
diff --git a/zsh-autosuggestions.zsh b/zsh-autosuggestions.zsh
index 9394cf8..a40cbdc 100644
--- a/zsh-autosuggestions.zsh
+++ b/zsh-autosuggestions.zsh
@@ -256,13 +256,23 @@ _zsh_autosuggest_clear() {
 _zsh_autosuggest_modify() {
 	local -i retval
 
+	# Save the contents of the buffer/postdisplay
+	local orig_buffer="$BUFFER"
+	local orig_postdisplay="$POSTDISPLAY"
+
 	# Clear suggestion while original widget runs
 	unset POSTDISPLAY
 
-	# Original widget modifies the buffer
+	# Original widget may modify the buffer
 	_zsh_autosuggest_invoke_original_widget $@
 	retval=$?
 
+	# Don't fetch a new suggestion if the buffer hasn't changed
+	if [ "$BUFFER" = "$orig_buffer" ]; then
+		POSTDISPLAY="$orig_postdisplay"
+		return $retval
+	fi
+
 	# Get a new suggestion if the buffer is not empty after modification
 	local suggestion
 	if [ $#BUFFER -gt 0 ]; then