vendor/assets/javascripts/retina.js in retina_rails-1.0.1 vs vendor/assets/javascripts/retina.js in retina_rails-1.0.2

@@ -1,143 +1,113 @@
-(function() {
-
+(function () {
   var root = (typeof exports == 'undefined' ? window : exports);
-
   var config = {
     // Ensure Content-Type is an image before trying to load @2x image
     // https://github.com/imulus/retinajs/pull/45)
     check_mime_type: true
   };
-
-
-
   root.Retina = Retina;
 
   function Retina() {}
-
-  Retina.configure = function(options) {
+  Retina.configure = function (options) {
     if (options == null) options = {};
     for (var prop in options) config[prop] = options[prop];
   };
-
-  Retina.init = function(context) {
+  Retina.init = function (context) {
     if (context == null) context = root;
-
     var existing_onload = context.onload || new Function;
-
-    context.onload = function() {
-      var images = document.getElementsByTagName("img"), retinaImages = [], i, image;
+    context.onload = function () {
+      var images = document.getElementsByTagName("img"),
+        retinaImages = [],
+        i, image;
       for (i = 0; i < images.length; i++) {
         image = images[i];
         retinaImages.push(new RetinaImage(image));
       }
       existing_onload();
     }
   };
-
-  Retina.isRetina = function(){
+  Retina.isRetina = function () {
     var mediaQuery = "(-webkit-min-device-pixel-ratio: 1.5),\
-                      (min--moz-device-pixel-ratio: 1.5),\
-                      (-o-min-device-pixel-ratio: 3/2),\
-                      (min-resolution: 1.5dppx)";
-
+      (min--moz-device-pixel-ratio: 1.5),\
+      (-o-min-device-pixel-ratio: 3/2),\
+      (min-resolution: 1.5dppx)";
     if (root.devicePixelRatio > 1)
       return true;
-
     if (root.matchMedia && root.matchMedia(mediaQuery).matches)
       return true;
-
     return false;
   };
-
-
   root.RetinaImagePath = RetinaImagePath;
 
   function RetinaImagePath(path, at_2x_path) {
     this.path = path;
     if (typeof at_2x_path !== "undefined" && at_2x_path !== null) {
       this.at_2x_path = at_2x_path;
       this.perform_check = false;
     } else {
-      this.at_2x_path = path.replace(/\.\w+$/, function(match) { return "@2x" + match; });
+      this.at_2x_path = path.replace(/\.\w+$/, function (match) {
+        return "@2x" + match;
+      });
       this.perform_check = true;
     }
   }
-
   RetinaImagePath.confirmed_paths = [];
-
-  RetinaImagePath.prototype.is_external = function() {
-    return !!(this.path.match(/^https?\:/i) && !this.path.match('//' + document.domain) )
-  }
-
-  RetinaImagePath.prototype.check_2x_variant = function(callback) {
+  RetinaImagePath.prototype.check_2x_variant = function (callback) {
     var http, that = this;
-    if (this.is_external()) {
-      return callback(false);
-    } else if (!this.perform_check && typeof this.at_2x_path !== "undefined" && this.at_2x_path !== null) {
+    if (!this.perform_check && typeof this.at_2x_path !== "undefined" && this.at_2x_path !== null) {
       return callback(true);
     } else if (this.at_2x_path in RetinaImagePath.confirmed_paths) {
       return callback(true);
     } else {
       http = new XMLHttpRequest;
       http.open('HEAD', this.at_2x_path);
-      http.onreadystatechange = function() {
+      http.onreadystatechange = function () {
         if (http.readyState != 4) {
           return callback(false);
         }
-
         if (http.status >= 200 && http.status <= 399) {
           if (config.check_mime_type) {
             var type = http.getResponseHeader('Content-Type');
             if (type == null || !type.match(/^image/i)) {
               return callback(false);
             }
           }
-
           RetinaImagePath.confirmed_paths.push(that.at_2x_path);
           return callback(true);
         } else {
           return callback(false);
         }
       }
       http.send();
     }
   }
 
-
-
   function RetinaImage(el) {
     this.el = el;
     this.path = new RetinaImagePath(this.el.getAttribute('src'), this.el.getAttribute('data-at2x'));
     var that = this;
-    this.path.check_2x_variant(function(hasVariant) {
+    this.path.check_2x_variant(function (hasVariant) {
       if (hasVariant) that.swap();
     });
   }
-
   root.RetinaImage = RetinaImage;
-
-  RetinaImage.prototype.swap = function(path) {
+  RetinaImage.prototype.swap = function (path) {
     if (typeof path == 'undefined') path = this.path.at_2x_path;
-
     var that = this;
+
     function load() {
-      if (! that.el.complete) {
+      if (!that.el.complete) {
         setTimeout(load, 5);
       } else {
         that.el.setAttribute('width', that.el.offsetWidth);
         that.el.setAttribute('height', that.el.offsetHeight);
         that.el.setAttribute('src', path);
         that.el.setAttribute('data-retina', true);
       }
     }
     load();
   }
-
-
-
-
   if (Retina.isRetina()) {
     Retina.init(root);
   }
-
-})();
+})();
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