https://abgcrot.net/wp-content/themes/ultimatube/assets/js/waterfall.js?ver=1.1.0

1/*!
2   --------------------------------
3   Waterfall.js
4   --------------------------------
5   + https://github.com/raphamorim/waterfall
6   + version 1.1.0
7   + Copyright 2016 Raphael Amorim & Israel Teixeira
8   + Licensed under the MIT license
9   + Documentation: https://github.com/raphamorim/waterfall
10*/
11
12(function (root, factory) {
13  if (typeof define === 'function' && define.amd) {
14    define('waterfall', function () {
15      return factory
16    })
17  } else if (typeof module === 'object' && module.exports) {
18    module.exports = factory
19  } else {
20    root.waterfall = factory
21  }
22}(this, function waterfall (container) {
23  if (typeof (container) === 'string') {
24    container = document.querySelector(container)
25  }
26
27  function style (el) {
28    return window.getComputedStyle(el)
29  }
30
31  function margin (name, el) {
32    return parseFloat(style(el)['margin' + name]) || 0
33  }
34
35  function px (n) { return parseFloat(n) + 'px' }
36  function y (el) { return parseFloat(el.style.top) }
37  function x (el) { return parseFloat(el.style.left) }
38  function width (el) { return parseFloat(style(el).width) }
39  function height (el) { return parseFloat(style(el).height) }
40  function bottom (el) { return y(el) + height(el) + margin('Bottom', el) }
41  function right (el) { return x(el) + width(el) + margin('Right', el) }
42
43  function sort (l) {
44    l = l.sort(function (a, b) {
45      var bottomDiff = bottom(b) - bottom(a)
46      return bottomDiff || x(b) - x(a)
47    })
48  }
49
50  function Boundary (firstRow) {
51    var els = firstRow
52    sort(els)
53
54    this.add = function (el) {
55      els.push(el)
56      sort(els)
57      els.pop()
58    }
59
60    this.min = function () { return els[els.length - 1] }
61    this.max = function () { return els[0] }
62  }
63
64  function placeEl (el, top, left) {
65    el.style.position = 'absolute'
66    el.style.top = px(top)
67    el.style.left = px(left)
68  }
69
70  function placeFirstElement (el) {
71    placeEl(el, 0, margin('Left', el))
72  }
73
74  function placeAtTheFirstLine (prev, el) {
75    placeEl(el, prev.style.top, right(prev) + margin('Left', el))
76  }
77
78  function placeAtTheSmallestColumn (minEl, el) {
79    placeEl(el, bottom(minEl) + margin('Top', el), x(minEl))
80  }
81
82  function adjustContainer (container, maxEl) {
83    container.style.position = 'relative'
84    container.style.height = px(bottom(maxEl) + margin('Bottom', maxEl))
85  }
86
87  function thereIsSpace (els, i) {
88    return right(els[i - 1]) + width(els[i]) <= width(container)
89  }
90
91  var els = container.children
92
93  if (els.length) {
94    placeFirstElement(els[0])
95  }
96
97  for (var i = 1; i < els.length && thereIsSpace(els, i); i++) {
98    placeAtTheFirstLine(els[i - 1], els[i])
99  }
100
101  var firstRow = [].slice.call(els, 0, i)
102  var boundary = new Boundary(firstRow)
103
104  for (; i < els.length; i++) {
105    placeAtTheSmallestColumn(boundary.min(), els[i])
106    boundary.add(els[i])
107  }
108
109  adjustContainer(container, boundary.max())
110}))