View difference between Paste ID: m1KCzjdk and 0Y64rCvL

 #! /bin/echo This file must be sourced: .
 
 function kb_highlight() {
 	case $cmdname in
 #Video
 mplayer|mwrap|vlc|gmplayer|smplayer|mencoder|kmplayer|Parole|whaawmp|dragonplayer|ffmpeg)
 extlist='mkv|m4v|mp.|avi|wmv|rmvb|as?|divx|vob|ogm|rm|flv|part|iso|ogg|wav|flac|m4a'
 ;;
 #Audio
 mpg123|mpg123s|mpg321|mp3blaster|cmus|cplay|moc|xmms|xmms2|sonata|deadbeef|ogg123|mnama)
 extlist='mp?|aac|wav|ogg|gsm|dct|flac|au|aiff|vox|wma|aac|ra|m4a'
 ;;
 #PDF
 llpp|xpdf|epdfview|evince|foxit|mupdf|okular|apvlv|zathura)
 extlist='pdf'
 ;;
 #Images
 feh|geeqie|gqview|eog|gpicview|gthumb|mirage|qiv|ristretto|xnview|xv|viewnior)
 extlist='jpg|jpeg|png|gif|bmp|icon?|tiff?'
 ;;
 #Games
 sdlmame|openmsx|msxplay|zsnes|desmume|VirtualBoy)
 extlist='rom|dsk'
 ;;
 #Wine
 wine|winewrap|wineconsole)
 extlist='exe|com|bat'
 ;;
 #Archives
 atool|x|xi|gunzip|extract|unzip|unrar|zip|rar|7z|mcomix|v)
 extlist='tgz|zip|rar|bz2|gz|tar|exe|pk3|lha|Z|lzma'
 ;;
 #Text
 vim|nano|acme|beaver|geany|leafpad|medit|mousepad|pyroom|sam|vi|gvim|emacs|tea|scite)
 extlist='txt|rc|sh|c|bash|py|ini'
 ;;
 *) extlist='-Unmatch-';;
 esac
 }
 
 function kb_menu() {
 	local end=0 h goodlist badlist total colorsw page pages sel=0 count key newk change=1 lim=7 displayres tempfile
 	tput rmam #don't wrap long lines
 	IFS=$'\n'
 	prompt="$2"
 
 	while ((end==0)); do
 
 	# build a new list
 	if ((change == 1)); then
 		change=0
 		sel=0
 		if [[ "$1" == command ]]; then
 			displayres=( $(compgen -A command -A alias -A builtin -A function $prompt | sort -u) )
 		elif [[ "$1" == file ]]; then
 			colorsw=0
 			goodlist=()
 			badlist=()
 			displayres=()
 			for tempfile in $prompt*; do
 				if [[ -d "$tempfile" ]]; then
 					tempfile+=/
 				fi
 				if [[ "$cmdname" =~ ^(c|cd|popd|rmdir)$ ]]; then
 					if [[ -d "$tempfile" ]]; then
 					goodlist+=( "$tempfile" )
 					((colorsw++))
 					else
 					badlist+=( "$tempfile" )
 					fi
 				elif [[ "$tempfile" =~ \.($extlist)$ ]]; then
 					goodlist+=( "$tempfile" )
 					((colorsw++))
 				else
 					badlist+=( "$tempfile" )
 				fi
 			done
 		fi
 		[[ "$1" == file ]] && colorsw=${#goodlist[@]} && displayres=( "${goodlist[@]}" "${badlist[@]}" )
 		total=${#displayres[@]}
 
 		# on zero results retry without front match
 		if [[ "$1" == file ]] && ((total==0)); then
 			colorsw=0
 			if [[ "${prompt//[^\/]}" ]]; then
 			for tempfile in ${prompt%/*}/*${prompt##*/}*; do
 				if [[ -d "$tempfile" ]]; then
 					tempfile+=/
 				fi
 				if [[ "$cmdname" =~ ^(c|cd|popd|rmdir)$ ]]; then
 					if [[ -d "$tempfile" ]]; then
 					goodlist+=( "$tempfile" )
 					((colorsw++))
 					else
 					badlist+=( "$tempfile" )
 					fi
 				elif [[ "$tempfile" =~ \.($extlist)$ ]]; then
 					goodlist+=( "$tempfile" )
 					((colorsw++))
 				else
 					badlist+=( "$tempfile" )
 				fi
 			done
 			else
 			for tempfile in *$prompt*; do
 				if [[ -d "$tempfile" ]]; then
 					tempfile+=/
 				fi
 				if [[ "$cmdname" =~ ^(c|cd|popd|rmdir)$ ]]; then
 					if [[ -d "$tempfile" ]]; then
 					goodlist+=( "$tempfile" )
 					((colorsw++))
 					else
 					badlist+=( "$tempfile" )
 					fi
 				elif [[ "$tempfile" =~ \.($extlist)$ ]]; then
 					goodlist+=( "$tempfile" )
 					((colorsw++))
 				else
 					badlist+=( "$tempfile" )
 				fi
 			done
 			fi
 			colorsw=${#goodlist[@]}
 			displayres=( "${goodlist[@]}" "${badlist[@]}" )
 			total=${#displayres[@]}
 		fi
 		((total==1)) && prompt=${displayres[0]} && break
 		(( total < lim )) && h=$total || h=$lim
 		pages=$(( total /lim))
 	fi
 	((sel < 0)) && sel=0
 	((sel >= total)) && sel=$((total -1))
 
 	page=$((sel /lim))
 	echo "p$page/$pages: $before$prompt"$'\e[47m \e[0m '
 	echo -ne '\e[A'
 	for ((count = lim *(sel /lim); count < lim +lim *(sel /lim); count++)); do
 		echo -ne '\e[0m'
 		[[ $count == $total && $page == 0 ]] && break || echo
 		(($sel == $count)) && echo -n "X " || echo -n "  "
 		((count < colorsw)) && echo -ne '\e[31m'
 		echo -n "${displayres[$count]}"
 	done
 
 	tput civis >&2 #turn cursor invisible
 	read -n1 key
 	[[ $key ]] || key=ENTER
 	#[[ "$key" == ' ' ]] && key=Space
 	if [[ "$key" == $'\e' ]]; then
 		key=ESC
 		while true; do
 			read -n 1 -t 0.0001 -s newk
 			[[ "$newk" == $'\e' ]] && newk=ESC
 			key=${key}${newk}
 			[[ -z "$newk" || "$newk" =~ [~A-Da-d] ]] && break
 		done
 	fi
 	case "$key" in
 		'ESC[A')	((sel--));; #UP
 		'ESC[B')	((sel++));; #DOWN
 		'ESC[6~')	((sel+=7));; #PGDN
 		'ESC[5~')	((sel-=7));; #PGUP
 		'ESC[4~'|'ESC[F'|'ESC[8~'|'ESCOF')	((sel=$total));; #END
 		'ESC[1~'|'ESC[H'|'ESC[7~'|'ESCOH')	((sel=0));; #HOME
 		'ENTER')	[[ "${displayres[$sel]}" ]] && prompt="${displayres[$sel]}"; end=1;; #ENTER
 		'ESC[2~')	appendprompt=\ $prompt; prompt="${displayres[$sel]}"; end=1;; #INSERT
 		'ESC')		nospace=1; end=1;; #ESC
 		$'\x7f'|$'\x08')	change=1; [[ $prompt ]] && prompt=${prompt::-1};; #BACKSPACE
 		'ESC'*) :;; #UNUSED KEY
 		*) change=1; prompt+=$key;;
 	esac
 
 	for (( count=0; count < $h; count++)); do
 		echo -ne "\e[2K\e[A\r"
 	done
 	tput cnorm >&2 #restore cursor visibility
 	echo -ne '\e[2K\r'
 	done
 }
 function kb_replace_var() {
 	local var fill
 	OIFS=$IFS
 	IFS=$'\n'
 	last="${last/\~/$HOME}"
 	[[ "${last//[^$]}" ]] && \
 	for var in $(echo "$last" | /usr/bin/grep -o '\$[a-zA-Z_][a-zA-Z0-9_]*' | tr -d '$'); do
 		fill=${!var}
 		last="${last/\$$var/$fill}"
 	done
 	IFS=$OIFS
 }
 function kb_write_prompt() {
 	local out escquote lang
 	IFS=$' \t\n'
 	dir=${1: -1}
 	[[ "$dir" == / ]] && dir= || dir=' '
 	(( nospace == 1 )) && { dir= && nospace=; } || nospace=\'
 	escquote=${1//\'/\'\\\'\'}
 	out="$before$nospace$escquote$nospace$dir$appendprompt"
 	lang=$LC_ALL
 	LC_ALL=C
 	((READLINE_POINT+=${#out} - ${#READFIRST}))
 	LC_ALL=$LC_ALL
 	READLINE_LINE=$out$READLAST
 }
 function kb_main() {
 	local cmdname extlist appendprompt recursive quotes last before psheight nospace=0 extglob nocaseglob nullglob globstar READFIRST READLAST
 	READFIRST="${READLINE_LINE::$READLINE_POINT}"
 	READLAST="${READLINE_LINE:$READLINE_POINT}"
 	psheight=$( echo -e "$PS1" | wc -l)
 	((psheight--))
 	IFS=$' \t\n'
 
 	# is the line has no words, add a tab.
-	if [[ "$READFIRST" == ^[[:blank:]]*$ ]]; then
+	if [[ "$READFIRST" =~ ^[[:blank:]]*$ ]]; then
 		READLINE_LINE="$READFIRST"$'\t'"$READLAST"
 		((READLINE_POINT++))
 		return
 	fi
 
 	# count non-escaped quotes
 	quotes=${READFIRST//\\\'}
 	quotes=${quotes//[^\']}
 	quotes=${#quotes}
 
 	# the last word is empty, start completing from scratch
 	if [[ "${READFIRST: -1}" == ' ' && "${READFIRST: -2:1}" != '\' ]] && (( quotes % 2 == 0)); then
 		before=$READFIRST
 		last=
 	# complete a command (TODO:add sudo and such)
 	elif [[ $READFIRST =~ ^\ *[^\ ]+$ ]]; then
 		kb_menu command "$READFIRST"
 		prompt+=" "
 		((READLINE_POINT+=${#prompt} - ${#READFIRST}))
 		READLINE_LINE=$prompt$READLAST
 		IFS=$' \t\n'
 		echo -ne "\e[${psheight}A\r\e[2K"
 		return
 
 	# complete part of a word
 	else
 		last="${READFIRST##* }"
 		recursive="${READFIRST% *}"
 #		last="${a[$((words -1))]}"
 	fi
 
 	nocaseglob=$(shopt nocaseglob | /usr/bin/grep -F on)
 	[[ $nocaseglob ]] || shopt -s nocaseglob
 	nullglob=$(shopt nullglob | /usr/bin/grep -F on)
 	[[ $nullglob ]] || shopt -s nullglob
 	extglob=$(shopt extglob | /usr/bin/grep -F on)
 	[[ $extglob ]] || shopt -s extglob
 	globstar=$(shopt globstar | /usr/bin/grep -F off)
 	[[ $globstar ]] || shopt -u globstar
 	cmdname=$(echo $READFIRST)
 	cmdname=${cmdname%% *}
 	kb_highlight "$cmdname"
 
 	# add words that end in \ to the $last word
 	while [[ -z "$before" ]] ; do
 		if [[ "${recursive: -1}" == '\' ]]; then
 			last="${recursive##* } $last"
 			recursive=${recursive% *}
 		else
 			before=$recursive\
 		fi
 	done
 
 	if (( quotes % 2 == 1 )) && ! [[ "$last" =~ \' ]]; then
 		# $last will be part of a quote instead.
 		# assume last quote is not escape.
 		before="${READFIRST%\'*}"
 		last="${READFIRST##*\'}"
 	fi
 
 	kb_replace_var
 
 	last=${last//\'}
 
 	kb_menu 'file' "$last"
 	kb_write_prompt "$prompt"
 
 	IFS=$' \t\n'
 	echo -ne "\r\e[2K\e[${psheight}A\r\e[2K"
 	[[ $nocaseglob ]] || shopt -u nocaseglob
 	[[ $nullglob ]] || shopt -u nullglob
 	[[ $extglob ]] || shopt -u extglob
 	[[ $globstar ]] || shopt -s globstar
 	tput smam >&2 #restore line wrap
 }
 bind -x '"\t":kb_main'