function breakAfter()

in content/resources/js/prettify.js [976:1017]
12 lines of code
2 McCabe index (conditional complexity)

        function breakAfter(lineEndNode) {
            // If there's nothing to the right, then we can skip ending the line
            // here, and move root-wards since splitting just before an end-tag
            // would require us to create a bunch of empty copies.
            while (!lineEndNode.nextSibling) {
                lineEndNode = lineEndNode.parentNode;
                if (!lineEndNode) { return; }
            }

            function breakLeftOf(limit, copy) {
                // Clone shallowly if this node needs to be on both sides of the break.
                var rightSide = copy ? limit.cloneNode(false) : limit;
                var parent = limit.parentNode;
                if (parent) {
                    // We clone the parent chain.
                    // This helps us resurrect important styling elements that cross lines.
                    // E.g. in <i>Foo<br>Bar</i>
                    // should be rewritten to <li><i>Foo</i></li><li><i>Bar</i></li>.
                    var parentClone = breakLeftOf(parent, 1);
                    // Move the clone and everything to the right of the original
                    // onto the cloned parent.
                    var next = limit.nextSibling;
                    parentClone.appendChild(rightSide);
                    for (var sibling = next; sibling; sibling = next) {
                        next = sibling.nextSibling;
                        parentClone.appendChild(sibling);
                    }
                }
                return rightSide;
            }

            var copiedListItem = breakLeftOf(lineEndNode.nextSibling, 0);

            // Walk the parent chain until we reach an unattached LI.
            for (var parent;
                // Check nodeType since IE invents document fragments.
                 (parent = copiedListItem.parentNode) && parent.nodeType === 1;) {
                copiedListItem = parent;
            }
            // Put it on the list of lines for later processing.
            listItems.push(copiedListItem);
        }