jodd-htmlstapler/src/main/java/jodd/htmlstapler/HtmlStaplerBundlesManager.java
protected String fixRelativeUrl(final String url, final String offsetPath) {
		final StringBuilder res = new StringBuilder();
		res.append("url('");

		if (!url.startsWith(StringPool.SLASH)) {
			res
				.append("../")
				.append(offsetPath);
		}

		res.append(url).append("')");

		return res.toString();
	}
protected String fixRelativeUrl(final String url, final String offsetPath) {
		final StringBuilder res = new StringBuilder();
		res.append("url('");

		if (!url.startsWith(StringPool.SLASH)) {
			res
				.append("../")
				.append(offsetPath);
		}

		res.append(url).append("')");

		return res.toString();
	}
For a given URL (optionally quoted), produces CSS URL
where relative paths are fixed and prefixed with offsetPath.