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| function waterfall(a) {
function b(a, b) {
var c = window.getComputedStyle(b);
return parseFloat(c["margin" + a]) || 0
}
function c(a) {
return a + "px"
}
function d(a) {
return parseFloat(a.style.top)
}
function e(a) {
return parseFloat(a.style.left)
}
function f(a) {
return a.clientWidth
}
function g(a) {
return a.clientHeight
}
function h(a) {
return d(a) + g(a) + b("Bottom", a)
}
function i(a) {
return e(a) + f(a) + b("Right", a)
}
function j(a) {
a = a.sort(function(a, b) {
return h(a) === h(b) ? e(b) - e(a) : h(b) - h(a)
})
}
function k(b) {
f(a) != t && (b.target.removeEventListener(b.type, arguments.callee), waterfall(a))
}
"string" == typeof a && (a = document.querySelector(a));
var l = [].map.call(a.children, function(a) {
return a.style.position = "absolute", a
});
a.style.position = "relative";
var m = [];
l.length && (l[0].style.top = "0px", l[0].style.left = c(b("Left", l[0])), m.push(l[0]));
for (var n = 1; n < l.length; n++) {
var o = l[n - 1],
p = l[n],
q = i(o) + f(p) <= f(a);
if (!q) break;
p.style.top = o.style.top, p.style.left = c(i(o) + b("Left", p)), m.push(p)
}
for (; n < l.length; n++) {
j(m);
var p = l[n],
r = m.pop();
p.style.top = c(h(r) + b("Top", p)), p.style.left = c(e(r)), m.push(p)
}
j(m);
var s = m[0];
a.style.height = c(h(s) + b("Bottom", s));
var t = f(a);
window.addEventListener ? window.addEventListener("resize", k) : document.body.onresize = k
}
|
