Only fetch a new suggestion if buffer has changed

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.
 

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

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