Indent

script

// character string used for indent
const indent = editor.preferredTabString

// grab ranges and text
let [selStart, selLen] = editor.getSelectedRange()
let [lnStart, lnLen] = editor.getSelectedLineRange()
let lnText = editor.getTextInRange(lnStart, lnLen)

// loop over lines and add indents skipping blank lines
let indentedLines = []
let indentCt = 0
let fl = false; // track line ending
if (lnText.endsWith("\n")) {
	lnText = lnText.slice(0, -1)
	fl = true
}
let lines = lnText.split("\n")
if (lines.length == 1 && lines[0].length == 0 && selLen == 0) {
	// cursor on a single empty line, just add indent
	editor.setTextInRange(selStart, 0, indent)
	editor.setSelectedRange(selStart+indent.length, 0)
}
else {
	for(let line of lines) {
		if (line.length > 0) { // do not indent blank line
			indentedLines.push(indent + line)
			indentCt++
		}
		else {
			indentedLines.push(line)
		}
	}

	// set text
	let resultText = indentedLines.join("\n")
	if (fl) { resultText = resultText + "\n" } // restore last ending
	editor.setTextInRange(lnStart, lnLen, resultText)

	// update selection
	let newStart = selStart + indent.length
	let newLen = selLen + (indent.length * (indentCt - 1))
	editor.setSelectedRange(newStart, newLen)
}