mangadown.patch

--- package.json.orig	Tue Jul 04 14:39:29 2017
+++ package.json	Wed Jul 12 18:19:16 2017
@@ -19,5 +19,8 @@
   "homepage": "https://github.com/anydown/mangadown#readme",
   "devDependencies": {
     "buble": "^0.15.2"
+  },
+  "dependencies": {
+    "data-uri-to-buffer": "0.0.4"
   }
 }
--- index.js.orig	Thu Jun 29 09:57:00 2017
+++ index.js	Wed Jul 12 18:27:05 2017
@@ -67,6 +67,19 @@
 var w = 420 + 20 * 2
 var h = (280 + 20) * 4 + 20
 
+const remote = require('electron').remote
+const os = remote.require('os')
+const fs = remote.require('fs')
+
+const path = require('path')
+const desktopDirName = 'Desktop'
+const homeDirPath = os.homedir()
+const desktopDirPath = path.join(homeDirPath, desktopDirName)
+
+const dataUriToBuffer = remote.require('data-uri-to-buffer')
+const dialog = remote.dialog
+
 new Vue({
   el: "#app",
   data: {
@@ -141,7 +154,26 @@
       destCtx.fillRect(0, 0, w, h)
       destCtx.drawImage(canvas, 0, 0);
       destCtx.drawImage(fabel, 0, 0);
-      window.open(eimage.toDataURL('image/png'));
+      //window.open(eimage.toDataURL('image/png'));
+      const canvasDataUrl = eimage.toDataURL('image/png')
+      const decoded = dataUriToBuffer(canvasDataUrl)
+      dialog.showSaveDialog(null, {
+          title: '画像の保存',
+          defaultPath: desktopDirPath,
+          filters: [
+              { name: 'PNG File', extensions: ['png']},
+              { name: 'All Files', extensions: ['*'] }
+          ]
+      }, (saveFiles) => {
+          fs.writeFile(saveFiles, decoded, (err) => {
+            if (err) {
+              window.alert('ファイルの保存に失敗しました')
+              console.log(err)
+            } else {
+              window.alert('ファイルを保存しました')
+            }
+          });
+      });
     },
     redraw: function () {
       var text = this.input