Move Line Up

script

// grab ranges and text
let [selStart, selLen] = editor.getSelectedRange()
let [lnStart, lnLen] = editor.getSelectedLineRange()
let lnText = editor.getTextInRange(lnStart, lnLen)
let text = editor.getText()
if (!lnText.endsWith("\n")) { // make sure it ends in a line feed
	lnText += "\n"
	lnLen += 1
}
	
if (lnStart == 0) { // check for beginning
	// do nothing - can't move first line up
}
else {
	// get previous line range
	let [prevLnStart, prevLnLen] = editor.getLineRange(lnStart - 1, 0)
	let prevLnText = editor.getTextInRange(prevLnStart, prevLnLen)
	editor.setTextInRange(prevLnStart, lnLen + prevLnLen, `${lnText}${prevLnText}`)
	editor.setSelectedRange(selStart - prevLnLen, selLen)
}