Improved criteria used to popup autosuggestions

autosuggestions.zsh

@@ -27,14 +27,14 @@ menu-complete reverse-menu-complete menu-expand-or-complete menu-select
 accept-and-menu-complete
 )
 
-pause-autosuggestions() {
+autosuggest-pause-autosuggestions() {
 	[[ -n $ZLE_AUTOSUGGESTING_PAUSED ]] && return
 	local widget
 	# When autosuggestions are disabled, kill the unmaterialized part
 	RBUFFER=''
 	unset ZLE_AUTOSUGGESTING
 	ZLE_AUTOSUGGESTING_PAUSED=1
-	zle -A self-insert paused-autosuggest-self-insert
+	zle -A self-insert autosuggest-paused-self-insert
 	zle -A .magic-space magic-space
 	zle -A .backward-delete-char backward-delete-char
 	zle -A .accept-line accept-line
@@ -44,7 +44,7 @@ pause-autosuggestions() {
 	for widget in $ZLE_AUTOSUGGEST_COMPLETION_WIDGETS; do
 		eval "zle -A autosuggest-${widget}-orig $widget"
 	done
-	highlight-suggested-text
+	autosuggest-highlight-suggested-text
 }
 
 enable-autosuggestions() {
@@ -53,9 +53,9 @@ enable-autosuggestions() {
 	unset ZLE_AUTOSUGGESTING_PAUSED
 	ZLE_AUTOSUGGESTING=1
 	# Replace prediction widgets by versions that will also highlight RBUFFER
-	zle -N self-insert autosuggest-self-insert
-	zle -N magic-space autosuggest-self-insert
-	zle -N backward-delete-char autosuggest-delete
+	zle -N self-insert autosuggest-insert-or-space
+	zle -N magic-space autosuggest-insert-or-space
+	zle -N backward-delete-char autosuggest-backward-delete-char
 	zle -N accept-line autosuggest-accept-line
 	# Hook into some default widgets that should pause autosuggestion
 	# automatically 
@@ -69,13 +69,13 @@ enable-autosuggestions() {
 			zle -A autosuggest-tab $widget"
 	done
 	if [[ $BUFFER != '' ]]; then
-		show-suggestion
+		autosuggest-pop-suggestion
 	fi
 }
 
 disable-autosuggestions() {
 	if [[ -z $ZLE_AUTOSUGGESTING_PAUSED ]]; then
-		pause-autosuggestions
+		autosuggest-pause-autosuggestions
 	fi
 	unset ZLE_AUTOSUGGESTING_PAUSED
 	zle -A .self-insert self-insert
@@ -90,7 +90,7 @@ toggle-autosuggestions() {
 	fi
 }
 
-highlight-suggested-text() {
+autosuggest-highlight-suggested-text() {
 	if [[ -n $ZLE_AUTOSUGGESTING ]]; then
 		local color='fg=8'
 		[[ -n $AUTOSUGGESTION_HIGHLIGHT_COLOR ]] &&\
@@ -101,36 +101,36 @@ highlight-suggested-text() {
 	fi
 }
 
-autosuggest-self-insert() {
-	setopt localoptions noshwordsplit noksharrays
-	if [[ ${RBUFFER[1]} == ${KEYS[-1]} ]]; then
-		# Same as what's typed, just move on
+autosuggest-insert-or-space() {
+	if [[ $LBUFFER == *$'\012'* ]] || (( PENDING )); then
+		# Editing a multiline buffer or pasting in a chunk of text, dont
+		# autosuggest
+		zle .$WIDGET "$@"
+	elif [[ ${RBUFFER[1]} == ${KEYS[-1]} ]]; then
+    # Same as what's typed, just move on
 		((++CURSOR))
-		highlight-suggested-text
+		autosuggest-highlight-suggested-text
 	else
-		LBUFFER="$LBUFFER$KEYS"
-		show-suggestion
+    LBUFFER="$LBUFFER$KEYS"
+		autosuggest-pop-suggestion
 	fi
 }
 
-# Taken from predict-on
-autosuggest-delete() {
-	if (( $#LBUFFER > 1 )); then
-		setopt localoptions noshwordsplit noksharrays
-		# When editing a multiline buffer, it's unlikely prediction is wanted;
-		# or if the last widget was e.g. a motion, then probably the intent is
-		# to actually edit the line, not change the search prefix.
-		if [[ $LASTWIDGET != (self-insert|magic-space|backward-delete-char) ]]; then
-			LBUFFER="$LBUFFER[1,-2]"
-		else
-			((--CURSOR))
-			zle .history-beginning-search-forward || RBUFFER=""
-			return 0
-		fi
-	else
-		zle .kill-whole-line
+autosuggest-backward-delete-char() {
+	if ! (( $CURSOR )); then
+	 	zle .kill-whole-line
+		return
+	fi
+
+	if [[ $LBUFFER == *$'\012'* || $LASTWIDGET != (self-insert|magic-space|backward-delete-char) ]]; then
+		# When editing a multiline buffer or if the last widget was e.g. a motion,
+		# then probably the intent is to actually edit the line, not change the
+		# search prefix.
+		LBUFFER="$LBUFFER[1,-2]"
+	else
+		((--CURSOR))
+		zle .history-beginning-search-forward || RBUFFER=''
 	fi
-	highlight-suggested-text
 }
 
 # When autosuggesting, ignore RBUFFER which corresponds to the 'unmaterialized'
@@ -141,50 +141,56 @@ autosuggest-accept-line() {
 	zle .accept-line
 }
 
-paused-autosuggest-self-insert() {
+autosuggest-paused-self-insert() {
 	if [[ $RBUFFER == '' ]]; then
 		# Resume autosuggestions when inserting at the end of the line
 		enable-autosuggestions
-		autosuggest-self-insert
+		zle autosuggest-modify
 	else
 		zle .self-insert
 	fi
 }
 
 autosuggest-get-suggested-completion() {
+	if (( $CURSOR == 0 )) || [[ ${LBUFFER[-1]} == ' ' ]]; then
+	 	RBUFFER=''
+		return
+	fi
+
 	local words last_word
-	local suggestion=$(autosuggest-first-completion $LBUFFER)
+	local suggestion="$(autosuggest-first-completion ${LBUFFER})"
 	words=(${(z)LBUFFER})
 	last_word=${words[-1]}
 	suggestion=${suggestion:$#last_word}
 	RBUFFER="$suggestion"
 }
 
-show-suggestion() {
+autosuggest-pop-suggestion() {
 	[[ -n $ZLE_DISABLE_AUTOSUGGEST || $LBUFFER == '' ]] && return
 	zle .history-beginning-search-backward ||\
 	 	autosuggest-get-suggested-completion
-	highlight-suggested-text
+	autosuggest-highlight-suggested-text
 }
 
 autosuggest-pause() {
-	pause-autosuggestions
+	autosuggest-pause-autosuggestions
 	zle autosuggest-${WIDGET}-orig "$@"
 }
 
 autosuggest-tab() {
 	RBUFFER=''
 	zle autosuggest-${WIDGET}-orig "$@"
+	autosuggest-highlight-suggested-text
 }
 
 accept-suggested-small-word() {
 	zle .vi-forward-word
-	highlight-suggested-text
+	autosuggest-highlight-suggested-text
 }
 
 accept-suggested-word() {
 	zle .forward-word
-	highlight-suggested-text
+	autosuggest-highlight-suggested-text
 }
 
 zle -N toggle-autosuggestions

completion-client.zsh

@@ -9,9 +9,13 @@ autosuggest-ensure-server() {
 	local pid_file="$server_dir/pid"
 	local socket_path="$server_dir/socket"
 
-	[[ -S $socket_path && -r $pid_file ]] && \
-	 	kill -0 $(<$pid_file) &> /dev/null || \
-	 	zsh $AUTOSUGGEST_SERVER_SCRIPT $server_dir $pid_file $socket_path &!
+	if [[ ! -S $socket_path || ! -r $pid_file ]] || ! kill -0 $(<$pid_file) &> /dev/null; then
+		if which setsid &> /dev/null; then
+			setsid zsh $AUTOSUGGEST_SERVER_SCRIPT $server_dir $pid_file $socket_path &!
+		else
+			zsh $AUTOSUGGEST_SERVER_SCRIPT $server_dir $pid_file $socket_path &!
+		fi
+	fi
 
 	integer remaining_tries=10
 	# wait until the process is listening
@@ -28,7 +32,7 @@ autosuggest-first-completion() {
 	local connection=$REPLY
 	local completion
 	print -u $connection - $1
-	while read -u $connection completion; do
+	while IFS= read -r -u $connection completion; do
 		print - ${completion}
 	done
 	# close fd

completion-server.zsh

@@ -2,20 +2,25 @@
 # Based on:
 # https://github.com/Valodim/zsh-capture-completion/blob/master/capture.zsh
 
-# close stdio
-exec &> /dev/null
+if [[ -n $ZLE_AUTOSUGGEST_SERVER_LOG ]]; then
+	exec &>> "$HOME/.autosuggest-server.log"
+else
+	exec &> /dev/null
+fi
 exec < /dev/null
 
 zmodload zsh/zpty
 zmodload zsh/net/socket
 setopt noglob
+print "autosuggestion server started, pid: $$"
 
 # Start an interactive zsh connected to a zpty
 zpty z ZLE_DISABLE_AUTOSUGGEST=1 zsh -i
+print 'interactive shell started'
 # Source the init script
 zpty -w z "source '${0:a:h}/completion-server-init.zsh'"
 
-# read all completions and return the longest match
+# read everything until a line containing the byte 0 is found
 read-to-null() {
 	while zpty -r z chunk; do
 		[[ $chunk == *$'\0'* ]] && break
@@ -26,6 +31,7 @@ read-to-null() {
 
 # wait for ok from shell
 read-to-null &> /dev/null
+print 'interactive shell ready'
 
 # listen on a socket for completion requests
 server_dir=$1
@@ -34,7 +40,9 @@ socket_path=$3
 
 
 cleanup() {
+	print 'removing socket and pid file...'
 	rm -f $socket_path $pid_file
+	print "autosuggestion server stopped, pid: $$"
 }
 
 trap cleanup TERM INT HUP EXIT
@@ -47,14 +55,18 @@ while ! zsocket -l $socket_path; do
 	else
 		exit 1
 	fi
+	print "will retry listening on '$socket_path'"
 done
 
-print $$ > $pid_file
-
 server=$REPLY
 
+print "server listening on '$socket_path'"
+
+print $$ > $pid_file
+
 while zsocket -a $server &> /dev/null; do
 	connection=$REPLY
+	print "connection accepted, fd: $connection"
 	# connection accepted, read the request and send response
 	while read -u $connection prefix &> /dev/null; do
 		# send the prefix to be completed followed by a TAB to force
@@ -63,7 +75,7 @@ while zsocket -a $server &> /dev/null; do
 		zpty -r z chunk &> /dev/null # read empty line before completions
 		local current=''
 		# read completions one by one, storing the longest match
-		read-to-null | while read line; do
+		read-to-null | while IFS= read -r line; do
 			(( $#line > $#current )) && current=$line
 		done
 		# send the longest completion back to the client, strip the last
@@ -75,6 +87,7 @@ while zsocket -a $server &> /dev/null; do
 		fi
 		# close fd
 		exec {connection}>&-
+		print "connection closed, fd: $connection"
 		# clear input buffer
 		zpty -w z $'\n'
 	done