old_blog/_includes/pagination.html

<!-- Paginator Links -->
<!-- Adopted from @shadowens brilliant solution: https://github.com/Shadowen/jekyll-paginator-links -->
<ul class="pagination">
    {% if include.maxPages %}
        {% assign maxPages = include.maxPages %}
    {% else %}
        <!-- maxPages attribute not passed in Liquid template, defaulting to 5 -->
        {% assign maxPages = 5 %}
    {% endif %}

    {% assign halfPages = maxPages | divided_by: 2 %}
    {% assign right-margin = paginator.total_pages | minus: paginator.page %}
    {% if paginator.page <= halfPages %}
        <!-- Align from the left -->
        <!-- Absurdity required to calculate minimum -->
        {% assign start = 1 %}
        {% if paginator.total_pages > maxPages %}
            {% assign end = maxPages %}
        {% else %}
            {% assign end = paginator.total_pages %}
        {% endif %}
    {% elsif right-margin <= halfPages %}
        <!-- Align from the right -->
        {% assign start = paginator.total_pages | minus: maxPages | plus: 1 | append: ',' | append: 1 | split: ',' | sort | last | plus: 0 %}
        {% assign end = paginator.total_pages %}
    {% else %}
        <!-- Align from the center -->
        <!-- Absurdity required to calculate maximum -->
        {% assign position-less-half = paginator.page | minus: halfPages %}
        {% if position-less-half < 1 %}
            {% assign start = 1 %}
        {% else %}
            {% assign start = position-less-half %}
        {% endif %}

        <!-- Absurdity required to calcuate minimum -->
        {% assign position-plus-half = paginator.page | plus: halfPages %}
        {% if position-plus-half > paginator.total_pages %}
            {% assign end = paginator.total_pages %}
        {% else %}
            {% assign end = position-plus-half %}
        {% endif %}
    {% endif %}

    <!-- First page -->
    <li class="pagination-item">
        <a class="pagination-link pagination-link--non-numeric" {% if paginator.page == 1 %}disabled="disabled"{% endif %} href="{{ '/index.html' | prepend: site.baseurl | replace: '//', '/' }}"><span class="pagination-link-arrow pagination-link-arrow--leftward">&larr;</span> First page</a>
    </li>

    <!-- Previous page -->
    <li class="pagination-item">
        <a class="pagination-link pagination-link--non-numeric" {% if paginator.previous_page == nil %}disabled="disabled"{% endif %} href="{{ paginator.previous_page_path | prepend: site.baseurl | replace: '//', '/' }}"><span class="pagination-link-arrow pagination-link-arrow--leftward">&larr;</span> Prev</a>
    </li>

    <!-- Start ellipsis -->
    {% if start > 1 %}
        <li class="pagination-item">
            <span class="pagination-ellipsis">&#8230;</span>
        </li>
    {% endif %}

    <!-- Page numbers -->
    {% for num  in (start..end) %}
        <li class="pagination-item">
            {% if num == paginator.page %}
            <a class="pagination-link pagination-link--selected" href="#"><span class="pagination-link-help">Page&nbsp;</span>{{ num }}</a>
            {% elsif num == 1 %}
                <a class="pagination-link" href="{{ '/index.html' | prepend: site.baseurl | replace: '//', '/' }}"><span class="pagination-link-help">Page&nbsp;</span>{{ num }}</a>
            {% else %}
                <a class="pagination-link" href="{{ site.paginate_path | prepend: site.baseurl | replace: '//', '/' | replace: ':num', num }}"><span class="pagination-link-help">Page&nbsp;</span>{{ num }}</a>
            {% endif %}
        </li>
    {% endfor %}

    <!-- End ellipsis -->
    {% if end < paginator.total_pages %}
        <li class="pagination-item">
            <span class="pagination-ellipsis">&#8230;</span>
        </li>
    {% endif %}

    <!-- Next page -->
    <li class="pagination-item">
        <a class="pagination-link pagination-link--non-numeric" {% if paginator.next_page == nil %}disabled="disabled"{% endif %} href="{{ paginator.next_page_path | prepend: site.baseurl | replace: '//', '/' }}">Next <span class="pagination-link-arrow pagination-link-arrow--rightward">&rarr;</span></a>
    </li>

    <!-- Last page -->
    <li class="pagination-item">
        <a class="pagination-link pagination-link--non-numeric" {% if paginator.page == paginator.total_pages %}disabled="disabled"{% endif %} href="{{ site.paginate_path | prepend: site.baseurl | replace: '//', '/' | replace: ':num', paginator.total_pages }}">Last page <span class="pagination-link-arrow pagination-link-arrow--rightward">&rarr;</span></a>
    </li>
</ul>