From 858ad0af98d75bbd2628b7d24dab3c4cb4440f75 Mon Sep 17 00:00:00 2001
From: mike-ward <mike@mike-ward.net>
Date: Sun, 31 Jan 2016 11:13:16 -0500
Subject: [PATCH] handle empty document

---
 src/MarkdownEdit/Controls/ImageDropDialog.xaml    |  8 +++++---
 src/MarkdownEdit/Controls/ImageDropDialog.xaml.cs | 14 ++++++++++++++
 src/MarkdownEdit/Models/Utility.cs                |  3 ---
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/src/MarkdownEdit/Controls/ImageDropDialog.xaml b/src/MarkdownEdit/Controls/ImageDropDialog.xaml
index 20393d67..ada09ad7 100644
--- a/src/MarkdownEdit/Controls/ImageDropDialog.xaml
+++ b/src/MarkdownEdit/Controls/ImageDropDialog.xaml
@@ -18,6 +18,7 @@
   <Window.Resources>
     <local:NullToVisibleConverter x:Key="NullToVisibleConverter" />
     <local:NotNullToVisibleConverter x:Key="NotNullToVisibleConverter" />
+    <local:NullOrEmptyToBooleanConverter x:Key="NullOrEmptyToBooleanConverter" />
     
     <Style x:Key="MenuIconStyle"
            TargetType="TextBlock">
@@ -70,13 +71,14 @@
         </MenuItem.Icon>
       </MenuItem>
 
-      <MenuItem x:Name="AsLocalFile" Header="{i18N:Localize image-drop-as-local-file}">
+      <MenuItem x:Name="AsLocalFile" 
+                Header="{i18N:Localize image-drop-as-local-file}"
+                IsEnabled="{Binding DocumentFileName, Converter={StaticResource NullOrEmptyToBooleanConverter}}">
         <MenuItem.Icon>
           <TextBlock Style="{StaticResource MenuIconStyle}">&#xE16F;</TextBlock>
         </MenuItem.Icon>
         
-        <Menu x:Name="LocalFoldersMenu"
-              Background="{DynamicResource MenuItemSelectionFill}"
+        <Menu Background="{DynamicResource MenuItemSelectionFill}"
               ItemsSource="{Binding DoumentFolders}">
           <Menu.ItemsPanel>
             <ItemsPanelTemplate>
diff --git a/src/MarkdownEdit/Controls/ImageDropDialog.xaml.cs b/src/MarkdownEdit/Controls/ImageDropDialog.xaml.cs
index 609ba043..d7187be7 100644
--- a/src/MarkdownEdit/Controls/ImageDropDialog.xaml.cs
+++ b/src/MarkdownEdit/Controls/ImageDropDialog.xaml.cs
@@ -256,4 +256,18 @@ public object ConvertBack(object value, Type targetType, object parameter, Cultu
             return (value is Visibility && (Visibility)value == Visibility.Visible);
         }
     }
+
+    public sealed class NullOrEmptyToBooleanConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            var text = value as string;
+            return !string.IsNullOrWhiteSpace(text);
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return value;
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/MarkdownEdit/Models/Utility.cs b/src/MarkdownEdit/Models/Utility.cs
index e82b0d4e..bc3d06ee 100644
--- a/src/MarkdownEdit/Models/Utility.cs
+++ b/src/MarkdownEdit/Models/Utility.cs
@@ -1,10 +1,7 @@
 using System;
 using System.Collections.Concurrent;
 using System.Diagnostics;
-using System.Drawing;
-using System.Drawing.Imaging;
 using System.IO;
-using System.Linq;
 using System.Media;
 using System.Net.Http;
 using System.Reflection;