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7

Print output of code in the middle of the screen

rated 0 times [ 7] [ 0] / answers: 1 / hits: 4656 / 3 Years ago, fri, october 22, 2021, 2:55:31

The code below will output whatever in file word by word on the screen. For example:

Hello will be displayed for 1 second and disappear. Then, the next word in the sentence will appear for a second and disappear and so on.

How do I output whatever is being displayed in the middle of the screen?

awk '{i=1; while(i<=NF){ print $((i++)); system("sleep 1; clear") }}' file

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answered 3 Years ago giccolla · Accepted Answer

Here you're a very robust bash script:

#!/bin/bash



## When the program is interrupted, call the cleanup function

trap "cleanup; exit" SIGHUP SIGINT SIGTERM



## Check if file exists

[ -f "$1" ] || { echo "File not found!"; exit; }



function cleanup() {

    ## Restores the screen content

    tput rmcup



    ## Makes the cursor visible again

    tput cvvis

}



## Saves the screen contents

tput smcup



## Loop over all words

while read line

do

    ## Gets terminal width and height

    height=$(tput lines)

    width=$(tput cols)



    ## Gets the length of the current word

    line_length=${#line}



    ## Clears the screen

    clear



    ## Puts the cursor on the middle of the terminal (a bit more to the left, to center the word)

    tput cup "$((height/2))" "$((($width-$line_length)/2))"



    ## Hides the cursor

    tput civis



    ## Prints the word

    printf "$line"



    ## Sleeps one second

    sleep 1



## Passes the words separated by a newline to the loop

done < <(tr ' ' '

' < "$1")



## When the program ends, call the cleanup function

cleanup