From 19c9fc0d9bd63de996db3ac7b2e7704842771ded Mon Sep 17 00:00:00 2001
From: Dave Woodfall <dave@slackbuilds.org>
Date: Tue, 23 Feb 2021 01:04:47 +0000
Subject: new-config dialog

One extra prompt at end to stop file list flying off top of screen.
Calculate lines in K/O/R/P prompt before printing it, and use it to
work out screen MAXROWS etc.
---
 files/post-functions.sh | 118 ++++++++++++++++++++++++++++++++----------------
 1 file changed, 78 insertions(+), 40 deletions(-)

diff --git a/files/post-functions.sh b/files/post-functions.sh
index 9fd483a..a9f86f8 100644
--- a/files/post-functions.sh
+++ b/files/post-functions.sh
@@ -124,6 +124,10 @@ runvimdiff() {
 }
 
 looknew() {
+	local ROWS SIZE FILES PROMPTTEXT TEXTLINES MAXROWS
+	local newcount f n fn
+	f=0
+	n=0
 
 	# with ONLY_NEW_DOTNEW set, slackpkg will search only for
 	# .new files installed in actual slackpkg's execution
@@ -133,10 +137,6 @@ looknew() {
 		ONLY_NEW_DOTNEW=""
 	fi
 
-	SIZE=$( stty size )
-	ROWS=${SIZE% *}
-	LISTMAX=$(( ROWS - 10 ))
-
 	printf "%s\n" "Searching for NEW configuration files..."
 
 	FILES=$( find \
@@ -154,53 +154,91 @@ looknew() {
 
 	if [ -n "$FILES" ]; then
 		newcount=$( echo "$FILES" | wc -l )
+		SIZE=$( stty size )
+		ROWS=${SIZE% *}
+
+		# Set here so we can count the No. of lines
+		PROMPTTEXT="\n\
+What do you want (K/O/R/P)?
+
+	(K)eep the old files and consider .new files later
+
+	(O)verwrite all old files with the new ones"
+
+		[ "$ORIG_BACKUPS" != "off" ] && PROMPTTEXT+=". The
+	   old files will be stored with the suffix .orig"
+
+		PROMPTTEXT+="\n\n\
+	(R)emove all .new files
+
+	(P)rompt K, O, R selection for every single file\n"
 
-		 printf "%s %s\n\n" "Some packages had new configuration" \
-			 "files installed ($newcount new files):"
+		printf "%s %s\n\n" "Some packages had new configuration" \
+			"files installed ($newcount new files):"
 
-		if [ $newcount -le $LISTMAX ]; then
-			echo "$FILES"
+		# No. of prompt etc. lines to print.
+		TEXTLINES=$(( $( printf %b "$PROMPTTEXT" | wc -l ) + 3 ))
+
+		if [ $(( newcount + TEXTLINES )) -lt $ROWS ]; then
+			# All files will fit on screen.
+			printf "%s\n" "$FILES"
 		else
-			F=0
-			N=0
-			for FN in $FILES; do
-				F=$(( F + 1 ))
-				N=$(( N + 1 ))
-				echo "$N $FN"
+			# Won't all fit, so scroll a screenfull at a time.
+			# No. of lines minus 'Searching for' + 'Press SPACE...'
+			MAXROWS=$(( ROWS - 5 ))
 
-				if [ $F -ge $(( ROWS - 5 )) ]; then
-					F=0
-					IFS=$( printf "\n" ) read -rn 1 \
-						-p "
-Press SPACE for more, ENTER to skip" junk
-					printf "\n"
-					tput -S <<EOF
-					cuu 1
-					el 2
-					cuu 1
-					el 2
-EOF
-					
+			for fn in $FILES; do
+				junk=" "
+				f=$(( f + 1 ))
+				n=$(( n + 1 ))
+				echo "$fn"
+
+				# Stop printing at bottom of screen
+				if [ $f -ge $MAXROWS ]; then
+
+					# No. of lines minus 'Press SPACE...'
+					MAXROWS=$(( ROWS - 2 ))
+					f=0
+					IFS=$( printf "\n" ) read -rn 1 -p "
+	Press SPACE for more, ENTER to skip" junk
+
+					# Enter pressed
 					if [ -z "$junk" ]; then
+						tput -S <<EOF
+						cuu 1
+						el 2
+						cuu 1
+						el 2
+EOF
 						break
+					else
+						# Space pressed
+						printf "\n"
+						tput -S <<EOF
+						cuu 1
+						el 2
+						cuu 1
+						el 2
+EOF
 					fi
 				fi
 			done
-		fi
-
-		echo -ne "\n\
-What do you want (K/O/R/P)?
 
-	(K)eep the old files and consider .new files later
-
-	(O)verwrite all old files with the new ones"
-		[ "$ORIG_BACKUPS" != "off" ] && echo -ne ". The
-	   old files will be stored with the suffix .orig"
-		echo -e "\n\n\
-	(R)emove all .new files
-
-	(P)rompt K, O, R selection for every single file"
+			# Final prompt to stop list scrolling off the top
+			if [ ! -z "$junk" ] && [ $f -ne 0 ]; then
+				IFS=$( printf "\n" ) read -rn 1 -p "
+	Press any key to continue" junk
+				printf "\n"
+				tput -S <<EOF
+				cuu 1
+				el 2
+				cuu 1
+				el 2
+EOF
+			fi
+		fi
 
+		printf %b "$PROMPTTEXT"
 		answer
 		case $ANSWER in
 			K|k)
-- 
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