Moves to the next item and returns it, or nil if we reached the end.

Moves to the previous item and returns it, or nil if we reached the beginning.

Iterates an HTML [resource], starting from the given [locator].

TODO maybe wrap manifest/fetcher in something that doesn't depend on pub package.

Start a depth-first traverse of the root and all of its descendants.

[Element] loaded with [hasPrevious] or [hasNext], associated with the move direction.

[Element] loaded with [hasPrevious] or [hasNext], associated with the move delta.

Note that this whole thing is based off of JSoup's NodeVisitor and NodeTraverser classes https://jsoup.org/apidocs/org/jsoup/select/NodeVisitor.html https://jsoup.org/apidocs/org/jsoup/select/NodeTraversor.html.

[Iterator] for a resource, associated with its [index] in the reading order.

Holds the result of parsing the HTML resource into a list of [element.Element].

Iterates through a list of [Element] items asynchronously.