https://simplefill.com/wp-content/themes/simplefill/js/retina.js?ver=7.0.5

1(function() {
2  var root = (typeof exports == 'undefined' ? window : exports);
3
4  var config = {
5    // Ensure Content-Type is an image before trying to load @2x image
6    // https://github.com/imulus/retinajs/pull/45)
7    check_mime_type: true,
8
9    // Resize high-resolution images to original image's pixel dimensions
10    // https://github.com/imulus/retinajs/issues/8
11    force_original_dimensions: true
12 };
13
14  root.Retina = Retina;
15
16  function Retina() {}
17
18  Retina.configure = function(options) {
19    if (options == null) options = {};
20    for (var prop in options) config[prop] = options[prop];
21  };
22
23  Retina.init = function(context) {
24    if (context == null) context = root;
25
26    var existing_onload = context.onload || new Function;
27
28    context.onload = function() {
29      var images = document.getElementsByTagName("img"), retinaImages = [], i, image;
30      for (i = 0; i < images.length; i++) {
31        image = images[i];
32        retinaImages.push(new RetinaImage(image));
33      }
34      existing_onload();
35    }
36  };
37
38  Retina.isRetina = function(){
39    var mediaQuery = "(-webkit-min-device-pixel-ratio: 1.5),\
40                      (min--moz-device-pixel-ratio: 1.5),\
41                      (-o-min-device-pixel-ratio: 3/2),\
42                      (min-resolution: 1.5dppx)";
43
44    if (root.devicePixelRatio > 1)
45      return true;
46
47    if (root.matchMedia && root.matchMedia(mediaQuery).matches)
48      return true;
49
50    return false;
51  };
52
53
54  root.RetinaImagePath = RetinaImagePath;
55
56  function RetinaImagePath(path, at_2x_path) {
57    this.path = path;
58    if (typeof at_2x_path !== "undefined" && at_2x_path !== null) {
59      this.at_2x_path = at_2x_path;
60      this.perform_check = false;
61    } else {
62      this.at_2x_path = path.replace(/\.\w+$/, function(match) { return "@2x" + match; });
63      this.perform_check = true;
64    }
65  }
66
67  RetinaImagePath.confirmed_paths = [];
68
69  RetinaImagePath.prototype.is_external = function() {
70    return !!(this.path.match(/^https?\:/i) && !this.path.match('//' + document.domain) )
71  }
72
73  RetinaImagePath.prototype.check_2x_variant = function(callback) {
74    var http, that = this;
75    if (this.is_external()) {
76      return callback(false);
77    } else if (!this.perform_check && typeof this.at_2x_path !== "undefined" && this.at_2x_path !== null) {
78      return callback(true);
79    } else if (this.at_2x_path in RetinaImagePath.confirmed_paths) {
80      return callback(true);
81    } else {
82      http = new XMLHttpRequest;
83      http.open('HEAD', this.at_2x_path);
84      http.onreadystatechange = function() {
85        if (http.readyState != 4) {
86          return callback(false);
87        }
88
89        if (http.status >= 200 && http.status <= 399) {
90          if (config.check_mime_type) {
91            var type = http.getResponseHeader('Content-Type');
92            if (type == null || !type.match(/^image/i)) {
93              return callback(false);
94            }
95          }
96
97          RetinaImagePath.confirmed_paths.push(that.at_2x_path);
98          return callback(true);
99        } else {
100          return callback(false);
101        }
102      }
103      http.send();
104    }
105  }
106
107
108
109  function RetinaImage(el) {
110    this.el = el;
111    this.path = new RetinaImagePath(this.el.getAttribute('src'), this.el.getAttribute('data-at2x'));
112    var that = this;
113    this.path.check_2x_variant(function(hasVariant) {
114      if (hasVariant) that.swap();
115    });
116  }
117
118  root.RetinaImage = RetinaImage;
119
120  RetinaImage.prototype.swap = function(path) {
121    if (typeof path == 'undefined') path = this.path.at_2x_path;
122
123    var that = this;
124    function load() {
125      if (! that.el.complete) {
126        setTimeout(load, 5);
127      } else {
128        if (config.force_original_dimensions) {
129          that.el.setAttribute('width', that.el.offsetWidth);
130          that.el.setAttribute('height', that.el.offsetHeight);
131        }
132
133        that.el.setAttribute('src', path);
134      }
135    }
136    load();
137  }
138
139
140
141
142  if (Retina.isRetina()) {
143    Retina.init(root);
144  }
145
146})();
147