edukeen-web/test.html at master · CyberOctane/edukeen-web · GitHub

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<!doctype html>
<html>

<head>
    <title>Live News Feed</title>
    <script>
        (function () {
            var _data = {
                feed: '',
                count: 1,
                interval: 7,
                prefs: widget.preferences,
                items: [],
                timer: null,
                title: '',
            }

            // update feeds in the speed-dial
            function _updateFeeds(i) {
                clearTimeout(_data.timer);
                var ind = (i || 0) % _data.count;
                var next = ind + 1;
                document.getElementById('title').textContent = _data.items[ind].title;
                document.getElementById('counter').textContent = (ind + 1) + '/' + _data.count;
                document.getElementById('desc').textContent = _data.items[ind].desc;
                document.getElementById('date').textContent = '(' + _data.items[ind].date + ')';


                var name = _data.prefs.getItem('nameCheckbox') === "true" ?
                    _data.title :
                    _data.prefs.getItem('nameInput');
                opera.contexts.speeddial.url = _data.items[ind].href;
                opera.contexts.speeddial.title = name;
                _data.feed = _data.prefs.getItem('feedUrl');

                // switch feeds every X seconds
                _data.timer = setTimeout(function () {
                    _updateFeeds(next)
                }, _data.interval * 1000);
            }

            function _clearData(message) {
                opera.extension.title = "Live news feed";
                document.getElementById('title').textContent = '';
                document.getElementById('desc').textContent = '';
                document.getElementById('date').textContent = '';
                document.getElementById('counter').style.display = 'none';
                var info = document.getElementById('prefs');
                info.style.display = '';
                if (message) info.textContent = message;
                else info.textContent = 'Click here to set your preferences!';

                opera.contexts.speeddial.url = 'options.html';
                opera.contexts.speeddial.title = widget.name;
                _data.items = [];
                clearTimeout(_data.timer);
            }

            // process the data received from the XHR
            function _processData(xhr) {
                var xmlDoc;
                if (!xhr.responseXML) {
                    var parser = new window.DOMParser()
                    try {
                        xmlDoc = parser.parseFromString(xhr.responseText, "text/xml");
                    } catch (error) {
                        return opera.postError('Error parsing feed.');
                    }
                } else {
                    xmlDoc = xhr.responseXML;
                }

                var title = xmlDoc.querySelector('title');
                _data.title = title.textContent || "No title";

                var items = xmlDoc.querySelectorAll('item, entry');
                var len = items.length;
                if (_data.count > len) _data.count = len;

                if (_data.count == 0 || len == 0) {
                    _clearData("No data!");
                    return;
                }

                for (var i = 0; i < _data.count; i++) {
                    _parseItem(items[i]);
                }
                document.getElementById('prefs').style.display = 'none';
                document.getElementById('counter').style.display = '';
                _updateFeeds();
            }

            // parse single DOM Element
            function _parseItem(item) {
                // sometimes descriptions contains tags like IMG
                var desc = document.createElement('div');
                var xmlDesc = item.querySelector('description, encoded, content');
                var description = xmlDesc ? xmlDesc.textContent : '';
                desc.innerHTML = unescapeText(description);
                var date = item.querySelector('pubDate');
                if (date) {
                    date = date.textContent.substr(5);
                } else {
                    date = item.querySelector('date, updated');
                    date = date ? date.textContent : '';
                }

                _data.items.push({
                    title: unescapeText(item.getElementsByTagName('title')[0].textContent.replace(
                        /(<([^>]+)>)/ig, "")),
                    desc: desc.textContent,
                    date: date,
                    href: item.getElementsByTagName('link')[0].textContent
                })
            }

            function unescapeText(text) {
                text = text.replace(/\&mdash;/g, '—');
                return text;
            }

            // get feeds from url
            function _XHRFeed() {
                clearTimeout(_updateTimer);
                if (!_data.feed || _data.feed == '') {
                    _clearData();
                    return;
                }

                xhr = new XMLHttpRequest();
                xhr.open('GET', _data.feed, true);
                xhr.onreadystatechange = function () {
                    if (this.readyState !== 4) {
                        _clearData('...');
                        return false;
                    };

                    _processData(this);
                    _updateTimer = setTimeout(_XHRFeed, 1000 * 120);
                }
                xhr.send(null);
            }

            // storage handler for the options page
            function _storageHandler() {
                clearTimeout(_updateTimer);
                _data.feed = _data.prefs.getItem('feedUrl');
                _data.count = _data.prefs.getItem('count');
                _data.interval = _data.prefs.getItem('interval');

                _XHRFeed();
            }

            // force an update of the storage values
            var _updateTimer = setTimeout(_storageHandler, 100);
            // against fast changes on options page
            addEventListener('storage',
                function () {
                    _updateTimer = setTimeout(_storageHandler, 500);
                }, false);

        })();
    </script>
    <style>
        body {
            margin: 0px;
            font-size: 12px;
            padding: 1em;
            background-color: #f2f2f2;
            font-family: sans-serif;
        }

        p {
            font-size: 1em;
            line-height: 1.4em;
            color: #222;
        }

        p#date {
            font-size: .75em;
            color: #777;
            margin: 0;
        }

        h1 {
            font-size: 1.5em;
            font-weight: normal;
            font-family: Georgia, serif;
            color: #bf2020;
            text-shadow: 0 1px 0 #fff;
        }

        #fadeout {
            position: absolute;
            bottom: 0;
            width: 100%;
            height: 30px;
            background: -o-linear-gradient(rgba(242, 242, 242, 0), rgba(242, 242, 242, 1));
        }

        #prefs {
            padding-top: 50px;
            text-align: center;
        }

        #counter {
            font-family: Georgia, serif;
            color: #555;
            position: absolute;
            right: 10px;
            top: 0;
            border: 1px solid #c2c2c2;
            border-top: none;
            padding: 4px;
            margin: 0;
            background-color: #f9f9f9;
            border-bottom-right-radius: 4px;
            border-bottom-left-radius: 4px;
            box-shadow: 1px 1px 0 #fff;
        }

        #inset {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            box-shadow: inset 0 2px 6px rgba(0, 0, 0, .3);
            z-index: 999;
        }
    </style>
</head>

<body>
    <div id="inset"></div>
    <div id="fadeout"></div>
    <p id="counter"></p>
    <p id="date"></p>
    <h1 id="title"></h1>
    <p id="desc"></p>
    <p id="prefs" style="display:none"></p>
</body>

</html>