{% extends "base.html" %}

{% block extrahead %}
    <script src="/static/js/jquery.lazyload.js" type="text/javascript" charset="utf-8"></script>
    <script type="text/javascript" charset="utf-8">        
        function aboveViewport(container, element, treshold) {
            return $(container).offset().top >= $(element).offset().top + $(element).height() + treshold;
        }
        
        function belowViewport(container, element, treshold) {
            return $(container).offset().top + $(container).height() + treshold <= $(element).offset().top;
        }
        
        var TRESHOLD = 600;
        var lastScroll = -1000;
                    
        function checkScroll() {
            if (Math.abs($('#images').scrollTop() - lastScroll) > 300) {
                var container = $('#images');
                lastScroll = container.scrollTop();
                
                $('#images .image-box').each(function() {
                    if (aboveViewport(container, this, TRESHOLD)) {
                        $(this).html('loading...');
                    } else if (belowViewport(container, this, TRESHOLD)) {
                        $(this).html('loading...');
                    } else {
                        $(this).html('<img src="' + $(this).attr('src') + '" width="460" height="460"/>');
                    }
                })
            }
            setTimeout(checkScroll, 2000);
        }
        
        $(function() {
            $('#id_folders').change(function() {
                $('#images').load('/images/' + $('#id_folders').val() + '/', function() {
                    lastScroll = -1000;
                });
            });
            
            setTimeout(checkScroll, 2000);
        });
    </script>
{% endblock extrahead %}

{% block breadcrumbs %}<a href="/">Platforma Redakcyjna</a> ❯ plik {{ hash }}{% endblock breadcrumbs %}

{% block maincontent %}
    <div id="tabs"><a href="{% url file_xml hash %}">Źródło</a><a href="{% url file_html hash %}" class="active">HTML</a><div style="padding: 3px; margin-left: 10px">{{ image_folders_form.folders }}</div><div style="clear: both; height: 0; width: 0">&nbsp;</div></div>    

    <div id="images">
        <div class="image-box">
            <p>Aby zobaczyć obrazki wybierz folder z obrazkami powyżej.</p>
        </div>
    </div>
    <div id="file-text">
    {{ object|safe }}
    </div>
{% endblock maincontent %}