gushogg-blake/script.js

## script.js
let Parser = require("tree-sitter");
let HTML = require("tree-sitter-html");

let parser = new Parser();

parser.setLanguage(HTML);

let code = dedent(`
	<!doctype html>
	<html>
		<body>
			<script>

			</script>
		</body>
	</html>
`);

let tree = parser.parse(code);

console.log("cursor:   " + [...generateNodes_cursor(tree.rootNode)].map(n => n.type).join(" "));
console.log("pointers: " + [...generateNodes_pointers(tree.rootNode)].map(n => n.type).join(" "));

function *generateNodes_cursor(node) {
	let cursor = node.walk();

	while (true) {
		let node = cursor.currentNode;

		yield node;

		if (!advanceCursor(cursor)) {
			break;
		}
	}
}

function *generateNodes_pointers(node) {
	while (true) {
		yield node;

		node = next(node);

		if (!node) {
			break;
		}
	}
}

function advanceCursor(cursor) {
	if (cursor.gotoFirstChild()) {
		return true;
	}

	if (cursor.gotoNextSibling()) {
		return true;
	}

	while (cursor.gotoParent()) {
		if (cursor.gotoNextSibling()) {
			return true;
		}
	}

	return false;
}

function next(node) {
	if (node.firstChild) {
		return node.firstChild;
	}

	if (node.nextSibling) {
		return node.nextSibling;
	}

	while (node = node.parent) {
		if (node.nextSibling) {
			return node.nextSibling;
		}
	}

	return null;
}

function dedent(str) {
	str = str.substr(1);

	let minIndent = str.split("\n").reduce(function(min, line) {
		return Math.min(min, line.match(/^\t*/)[0].length);
	}, Infinity) + 1;

	let re = new RegExp("^\t{" + minIndent + "}", "gm");

	str = str.replace(re, "");

	// final indent (up to closing `) is one less so doesn't match above
	str = str.replace(/\n\s+$/, "\n");

	return str;
}
	let Parser = require("tree-sitter");
	let HTML = require("tree-sitter-html");

	let parser = new Parser();

	parser.setLanguage(HTML);

	let code = dedent(`
	<!doctype html>
	<html>
	<body>
	<script>

	</script>
	</body>
	</html>
	`);

	let tree = parser.parse(code);

	console.log("cursor: " + [...generateNodes_cursor(tree.rootNode)].map(n => n.type).join(" "));
	console.log("pointers: " + [...generateNodes_pointers(tree.rootNode)].map(n => n.type).join(" "));

	function *generateNodes_cursor(node) {
	let cursor = node.walk();

	while (true) {
	let node = cursor.currentNode;

	yield node;

	if (!advanceCursor(cursor)) {
	break;
	}
	}
	}

	function *generateNodes_pointers(node) {
	while (true) {
	yield node;

	node = next(node);

	if (!node) {
	break;
	}
	}
	}

	function advanceCursor(cursor) {
	if (cursor.gotoFirstChild()) {
	return true;
	}

	if (cursor.gotoNextSibling()) {
	return true;
	}

	while (cursor.gotoParent()) {
	if (cursor.gotoNextSibling()) {
	return true;
	}
	}

	return false;
	}

	function next(node) {
	if (node.firstChild) {
	return node.firstChild;
	}

	if (node.nextSibling) {
	return node.nextSibling;
	}

	while (node = node.parent) {
	if (node.nextSibling) {
	return node.nextSibling;
	}
	}

	return null;
	}

	function dedent(str) {
	str = str.substr(1);

	let minIndent = str.split("\n").reduce(function(min, line) {
	return Math.min(min, line.match(/^\t*/)[0].length);
	}, Infinity) + 1;

	let re = new RegExp("^\t{" + minIndent + "}", "gm");

	str = str.replace(re, "");

	// final indent (up to closing `) is one less so doesn't match above
	str = str.replace(/\n\s+$/, "\n");

	return str;
	}