lib

#! /bin/bash

ESC="\0033["
OSC="\0033]"
SEP=";"
gx=0
gy=0
mx=0
my=0
sx=0
sy=0
n=1

function gotoXY() {
	echo -en "${ESC}$((gy + 1))${SEP}$((gx + 1))H"
}

gx=0; gy=0; gotoXY; echo -n "0"
gx=1; gy=1; gotoXY; echo -n "1"
gx=2; gy=2; gotoXY; echo -n "2"



function moveXY() {
	if [[ $mx -lt 0 ]]; then
		echo -en "${ESC}$((-mx))D"
	elif [[ $mx -gt 0 ]]; then
		echo -en "${ESC}$((mx))C"
	fi

	if [[ $my -lt 0 ]]; then
		echo -en "${ESC}$((-my))A"
	elif [[ $my -gt 0 ]]; then
		echo -en "${ESC}$((my))B"
	fi
}

mx=0; my=1; moveXY; echo -n "*"  
mx=0; my=1; moveXY; echo -n "*" 
mx=0; my=1; moveXY; echo -n "*"
mx=1; my=0; moveXY; echo -n "*"  
mx=1; my=0; moveXY; echo -n "*"
mx=1; my=0; moveXY; echo -n "*"



function moveUp() {
	echo -en "${ESC}${n}A"
}

function moveDown() {
	echo -en "${ESC}${n}B"
}

function moveForward() {
	echo -en "${ESC}${n}C"	
}

function moveBackward() {
	echo -en "${ESC}${n}D"	
}

function gotoLeft() {
	echo -en "${ESC}1G"
}

moveUp; moveUp; echo -n "Boo"
moveDown; moveDown; echo -n "Boo"

function savePosition() {
	echo -en "${ESC}s"
}

function restorePosition() {
	echo -en "${ESC}u"	
}

savePosition; gotoLeft; echo -n "Left"; restorePosition; echo "More"

function setXY() {
    exec < /dev/tty
    local _oldstty=$(stty -g)
    stty raw -echo min 0
    echo -en "\033[6n" > /dev/tty
    IFS=';' read -r -d R -a pos
    stty $_oldstty
    sx=$((${pos[1]} - 1))
    sy=$((${pos[0]:2}))
}

function nextLine() {
	echo -en "${ESC}E"
}

function previousLine() {
	echo -en "${ESC}F"	
}

function hideCursor() {
	echo -en "${ESC}?25l"
}

function showCursor() {
	echo -en "${ESC}?25h"
}

sleep 1; previousLine; sleep 1; previousLine; 
sleep 1; hideCursor; sleep 1; showCursor; echo -n "Back"



# TODO: 
# 1. continue translation to bash!
# 2. update shui to use these functions (copy those needed in)
# 3. fix shui to not write lines longer than the width of terminal

# 
# ansiEscapes.eraseLines = count => {
# 	let clear = '';
# 
# 	for (let i = 0; i < count; i++) {
# 		clear += ansiEscapes.eraseLine + (i < count - 1 ? ansiEscapes.cursorUp() : '');
# 	}
# 
# 	if (count) {
# 		clear += ansiEscapes.cursorLeft;
# 	}
# 
# 	return clear;
# };
# 
# ansiEscapes.eraseEndLine = ESC + 'K';
# ansiEscapes.eraseStartLine = ESC + '1K';
# ansiEscapes.eraseLine = ESC + '2K';
# ansiEscapes.eraseDown = ESC + 'J';
# ansiEscapes.eraseUp = ESC + '1J';
# ansiEscapes.eraseScreen = ESC + '2J';
# ansiEscapes.scrollUp = ESC + 'S';
# ansiEscapes.scrollDown = ESC + 'T';
# 
# ansiEscapes.clearScreen = '\u001Bc';
# 
# ansiEscapes.clearTerminal = isWindows
# 	? `${ansiEscapes.eraseScreen}${ESC}0f`
# 	// 1. Erases the screen (Only done in case `2` is not supported)
# 	// 2. Erases the whole screen including scrollback buffer
# 	// 3. Moves cursor to the top-left position
# 	// More info: https://www.real-world-systems.com/docs/ANSIcode.html
# 	: `${ansiEscapes.eraseScreen}${ESC}3J${ESC}H`;
# 
# ansiEscapes.enterAlternativeScreen = ESC + '?1049h';
# ansiEscapes.exitAlternativeScreen = ESC + '?1049l';
# 
# ansiEscapes.beep = BEL;
# 
# ansiEscapes.link = (text, url) => [
# 	OSC,
# 	'8',
# 	SEP,
# 	SEP,
# 	url,
# 	BEL,
# 	text,
# 	OSC,
# 	'8',
# 	SEP,
# 	SEP,
# 	BEL,
# ].join('');