deploy dev version

dev/js/utils/FileUtils.js

@@ -0,0 +1,51 @@
+(function () {
+  var ns = $.namespace('pskl.utils');
+
+  var stopPropagation = function (e) {
+    e.stopPropagation();
+  };
+
+  ns.FileUtils = {
+    readFile : function (file, callback) {
+      var reader = new FileReader();
+      reader.addEventListener('loadend', function() {
+        callback(reader.result);
+      });
+      reader.readAsDataURL(file);
+    },
+
+    readFileAsArrayBuffer : function (file, callback) {
+      var reader = new FileReader();
+      reader.addEventListener('loadend', function() {
+        callback(reader.result);
+      });
+      reader.readAsArrayBuffer(file);
+    },
+
+    readImageFile : function (file, callback) {
+      ns.FileUtils.readFile(file, function (content) {
+        var image = new Image();
+        image.onload = callback.bind(null, image);
+        image.src = content;
+      });
+    },
+
+    downloadAsFile : function (content, filename) {
+      var saveAs = window.saveAs || (navigator.msSaveBlob && navigator.msSaveBlob.bind(navigator));
+      if (saveAs) {
+        saveAs(content, filename);
+      } else {
+        var downloadLink = document.createElement('a');
+        content = window.URL.createObjectURL(content);
+        downloadLink.setAttribute('href', content);
+        downloadLink.setAttribute('download', filename);
+        document.body.appendChild(downloadLink);
+        downloadLink.addEventListener('click', stopPropagation);
+        downloadLink.click();
+        downloadLink.removeEventListener('click', stopPropagation);
+        document.body.removeChild(downloadLink);
+      }
+    }
+
+  };
+})();