Shell中实现飞行文字效果

#!/bin/bash[ -z $1 ] && echo "Input is invalid! " && exit 1txt=($(cat $1|sed 's/ /+/_/g'))lines=${#txt[@]}max_show=10   #最多显示行数（超过总行数则设为总行数）[ ${max_show} -gt ${lines} ] && max_show=${lines}hlt_line=3  #高亮显示位置（不超过总行1/2，设为3实际是第4行）[ ${hlt_line} -gt $(( lines / 2 )) ] && hlt_line=$(( lines / 2 ))sTTY=$(stty -g)  #保存终端设置clearecho -ne "/033[?25l" #隐藏光标spaces() {local i j ni=0; n=0for (( j=0; j <= ${lines}; j++ ));do[ $i -lt ${#txt[$j]} ] && (( i = ${#txt[$j]} )) && (( n = $j ))doneecho ${txt[$n]}|sed 's/./  /g'}space_line=$(spaces)#传递的参数是欲显示行的序数：show 1 表示第一行高亮显示show() {local i j text crt_linej=$1for (( i=0; i < max_show; i++ ));docrt_line=$(( j + i - hlt_line ))if [ $i -eq ${hlt_line} ] && [ ${crt_line} -ge 0 ] && [ ${crt_line} -le ${lines} ];thentext="/033[;32m"${txt[${crt_line}]}"/033[0m"elif [ ${crt_line} -lt 0 ] || [ ${crt_line} -gt ${lines} ];thentext=${space_line}elsetext=${txt[${crt_line}]}fiecho -ne "/033[$((i+3));0H${space_line}"echo -ne "/033[$((i+3));6H${text}"done}#测试for (( j = 0; j < lines + hlt_line +1 ; j++ ));doshow $jsleep 1done

echo ""stty ${sTTY} #恢复终端设置echo -e "/033[?25h/033[0;0H" #恢复光标