From 5231824d98a0817cd2a372f8570e148eeaed7f95 Mon Sep 17 00:00:00 2001
From: Christoph Oberhofer <ch.oberhofer@gmail.com>
Date: Sun, 19 Jun 2016 17:32:21 +0200
Subject: [PATCH] Moved DOM objects to helper module

---
 example/file-input/index.js    |  6 +++---
 example/scan-to-input/index.js |  2 +-
 src/common/dom_helper.js       | 21 +++++++++++++++++++++
 src/input/config_factory.js    | 18 +++++++++---------
 4 files changed, 34 insertions(+), 13 deletions(-)
 create mode 100644 src/common/dom_helper.js

diff --git a/example/file-input/index.js b/example/file-input/index.js
index f8a9d23..a8acf52 100644
--- a/example/file-input/index.js
+++ b/example/file-input/index.js
@@ -4,11 +4,11 @@ var App = {
     init: function() {
         this.attachListeners();
     },
-    decode: function(src) {
+    decode: function(file) {
         Quagga
             .decoder({readers: ['ean_reader']})
             .locator({patchSize: 'medium'})
-            .fromImage(src, {size: 800})
+            .fromSource(file, {size: 800})
             .toPromise()
             .then(function(result) {
                 document.querySelector('input.isbn').value = result.codeResult.code;
@@ -35,7 +35,7 @@ var App = {
             e.preventDefault();
             fileInput.removeEventListener("change", onChange);
             if (e.target.files && e.target.files.length) {
-                self.decode(URL.createObjectURL(e.target.files[0]));
+                self.decode(e.target.files[0]);
             }
         });
     }
diff --git a/example/scan-to-input/index.js b/example/scan-to-input/index.js
index 3f805d8..09d2d15 100644
--- a/example/scan-to-input/index.js
+++ b/example/scan-to-input/index.js
@@ -66,7 +66,7 @@ var App = {
             this._scanner = Quagga
                 .decoder({readers: ['ean_reader']})
                 .locator({patchSize: 'medium'})
-                .fromVideo({
+                .fromSource({
                     target: selector,
                     constraints: {
                         width: 800,
diff --git a/src/common/dom_helper.js b/src/common/dom_helper.js
new file mode 100644
index 0000000..dfae643
--- /dev/null
+++ b/src/common/dom_helper.js
@@ -0,0 +1,21 @@
+const hasWindow = typeof window !== 'undefined';
+const windowRef = hasWindow ? window : {};
+
+const windowObjects = [
+    "MediaStream",
+    "HTMLImageElement",
+    "HTMLVideoElement",
+    "HTMLCanvasElement",
+    "FileList",
+    "File",
+    "URL"
+];
+
+const DOMHelper = windowObjects.reduce((result, obj) => {
+    return {
+        ...result,
+        [obj]: obj in windowRef ? windowRef[obj] : () => {}
+    };
+}, {});
+
+export default DOMHelper;
diff --git a/src/input/config_factory.js b/src/input/config_factory.js
index 0c49587..b345c20 100644
--- a/src/input/config_factory.js
+++ b/src/input/config_factory.js
@@ -1,29 +1,29 @@
 import {merge, pick, omitBy, isEmpty} from 'lodash';
 
+import DOMHelper from '../common/dom_helper';
+
 const isDataURL = {regex: /^\s*data:([a-z]+\/[a-z0-9\-\+]+(;[a-z\-]+\=[a-z0-9\-]+)?)?(;base64)?,[a-z0-9\!\$\&\'\,\(\)\*\+\,\;\=\-\.\_\~\:\@\/\?\%\s]*\s*$/i}, // eslint-disable-line max-len
     isBlobURL = {regex: /^\s*blob:(.*)$/i},
     isMediaURL = {regex: /^(?:(?:http[s]?|ftp):\/)?\/?(?:(?:[^:\/\s]+)(?:(?:\/\w+)*\/))?([\w\-]+\.([^#?\s]+))(?:.*)?(?:#[\w\-]+)?$/i},  // eslint-disable-line max-len
     isImageExt = {regex: /(jpe?g|png|gif|tiff)(?:\s+|$)/i},
     isVideoExt = {regex: /(webm|ogg|mp4|m4v)/i};
 
-const MediaStream = "MediaStream" in window ? window.MediaStream : function(){};
-
 export function createConfigFromSource(config, sourceConfig, source) {
-    if (source instanceof MediaStream) {
+    if (source instanceof DOMHelper.MediaStream) {
         return createConfigForStream(config, sourceConfig, {srcObject: source});
-    } else if (source instanceof HTMLImageElement) {
+    } else if (source instanceof DOMHelper.HTMLImageElement) {
         throw new Error('Source "HTMLImageElement": not yet supported');
         // return createConfigForImage(config, inputConfig, {image: source});
-    } else if (source instanceof HTMLVideoElement) {
+    } else if (source instanceof DOMHelper.HTMLVideoElement) {
         throw new Error('Source "HTMLVideoElement": not yet supported');
         // return createConfigForVideo(config, inputConfig, {video: source});
-    } else if (source instanceof HTMLCanvasElement) {
+    } else if (source instanceof DOMHelper.HTMLCanvasElement) {
         return createConfigForCanvas(config, sourceConfig, {canvas: source});
-    } else if (source instanceof FileList) {
+    } else if (source instanceof DOMHelper.FileList) {
         if (source.length > 0) {
             return createConfigForFile(config, sourceConfig, source[0]);
         }
-    } else if (source instanceof File) {
+    } else if (source instanceof DOMHelper.File) {
         return createConfigForFile(config, sourceConfig, source);
     } else if (typeof source === 'string') {
         return createConfigForString(config, sourceConfig, source);
@@ -64,7 +64,7 @@ function createConfigForMimeType(config, inputConfig, {src, mime}) {
 }
 
 function createConfigForFile(config, inputConfig, file) {
-    const src = window.URL.createObjectURL(file);
+    const src = DOMHelper.URL.createObjectURL(file);
     return createConfigForMimeType(config, inputConfig, {
         src,
         mime: file.type