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big.js
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big.js
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window.onload = function() {
var s = document.getElementsByTagName('div'), ti;
if (!s) return;
big = { current: 0, forward: fwd, reverse: rev, go: go, length: s.length };
function go(n) {
big.current = n;
var i = 1e3, e = s[n], t = parseInt(e.dataset.timeToNext || 0, 10);
document.body.className = e.dataset.bodyclass || '';
for (var k = 0; k < s.length; k++) s[k].style.display = 'none';
e.style.display = 'inline';
e.style.fontSize = i + 'px';
if (e.firstChild && e.firstChild.nodeName === 'IMG') {
document.body.style.backgroundImage = 'url(' + e.firstChild.src + ')';
e.firstChild.style.display = 'none';
if ('classList' in e) e.classList.add('imageText');
} else {
document.body.style.backgroundImage = '';
document.body.style.backgroundColor = e.style.backgroundColor;
}
if (ti !== undefined) window.clearInterval(ti);
if (t > 0) ti = window.setTimeout(fwd, (t * 1000));
while (e.offsetWidth > window.innerWidth ||
e.offsetHeight > window.innerHeight) {
e.style.fontSize = (i -= 2) + 'px';
if (i < 0) break;
}
e.style.marginTop = ((window.innerHeight - e.offsetHeight) / 2) + 'px';
if (window.location.hash !== n) window.location.hash = n;
document.title = e.textContent || e.innerText;
}
document.onclick = function() { go(++big.current % (s.length)); };
function fwd() { go(Math.min(s.length - 1, ++big.current)); }
function rev() { go(Math.max(0, --big.current)); }
document.onkeydown = function(e) {
if (e.which === 39 || e.which === 34 || e.which === 40) fwd();
if (e.which === 37 || e.which === 33 || e.which === 38) rev();
};
document.ontouchstart = function(e) {
var x0 = e.changedTouches[0].pageX;
document.ontouchend = function(e) {
var x1 = e.changedTouches[0].pageX;
if (x1 - x0 < 0) fwd();
if (x1 - x0 > 0) rev();
};
};
function parse_hash() {
return Math.max(Math.min(s.length - 1,
parseInt(window.location.hash.substring(1), 10)), 0);
}
if (window.location.hash) big.current = parse_hash() || big.current;
window.onhashchange = function() {
var c = parse_hash();
if (c !== big.current) go(c);
};
go(big.current);
};