Add very basic AttachmentDetailsPage

Author: Trolldemorted

Signal-Windows/Controls/Attachment.xaml

@@ -11,7 +11,7 @@
 
     <StackPanel Grid.Column="1" HorizontalAlignment="Stretch" VerticalAlignment="Center" Margin="8,0,0,0">
         <Grid Width="200" Height="200">
-            <Image Name="AttachmentImage" Stretch="UniformToFill">
+            <Image Name="AttachmentImage" Stretch="UniformToFill" Tapped="AttachmentImage_Tapped">
                 <Image.Source>
                     <BitmapImage UriSource="{x:Bind ImagePath, Mode=TwoWay}"/>
                 </Image.Source>

Signal-Windows/Controls/Attachment.xaml.cs

@@ -11,7 +11,7 @@
 using Windows.Foundation;
 using Windows.Foundation.Collections;
 using Windows.Storage;
-
+using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Controls.Primitives;
@@ -88,18 +88,28 @@ private void AttachmentDownloadIcon_Tapped(object sender, TappedRoutedEventArgs
             App.Handle.StartAttachmentDownload(Model);
         }
 
-        private static HashSet<string> IMAGE_TYPES = new HashSet<string>()
+        private void AttachmentImage_Tapped(object sender, TappedRoutedEventArgs e)
         {
-            "image/jpeg",
-            "image/png",
-            "image/gif",
-            "image/bmp"
-        };
+            if (IsDetailsPageEnabled)
+            {
+                App.CurrentSignalWindowsFrontend(ApplicationView.GetForCurrentView().Id).Locator.MainPageInstance.OpenAttachment(Model);
+            }
+        }
 
         public bool HandleUpdate(SignalAttachment sa)
         {
             DataContext = sa;
             return Model.Status != SignalAttachmentStatus.Finished && Model.Status != SignalAttachmentStatus.Failed_Permanently;
         }
+
+        private bool IsDetailsPageEnabled => IMAGE_TYPES.Contains(Model.ContentType);
+
+        private static HashSet<string> IMAGE_TYPES = new HashSet<string>()
+        {
+            "image/jpeg",
+            "image/png",
+            "image/gif",
+            "image/bmp"
+        };
     }
 }

Signal-Windows/Signal-Windows.csproj

@@ -209,6 +209,9 @@
     <Compile Include="Views\AppearanceSettingsPage.xaml.cs">
       <DependentUpon>AppearanceSettingsPage.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Views\AttachmentDetailsPage.xaml.cs">
+      <DependentUpon>AttachmentDetailsPage.xaml</DependentUpon>
+    </Compile>
     <Compile Include="Views\BlockedContactsPage.xaml.cs">
       <DependentUpon>BlockedContactsPage.xaml</DependentUpon>
     </Compile>
@@ -323,6 +326,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="Views\AttachmentDetailsPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="Views\BlockedContactsPage.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>

Signal-Windows/ViewModels/MainPageViewModel.cs

@@ -169,6 +169,11 @@ public void ConversationsList_SelectionChanged(object sender, SelectionChangedEv
         }
 
         #region SignalFrontend API
+        public void OpenAttachment(SignalAttachment sa)
+        {
+            View.Frame.Navigate(typeof(AttachmentDetailsPage), sa);
+        }
+
         public void AddOrUpdateConversation(SignalConversation conversation, SignalMessage updateMessage)
         {
             SignalConversation uiConversation;

Signal-Windows/Views/AttachmentDetailsPage.xaml

@@ -0,0 +1,20 @@
+<Page
+    x:Class="Signal_Windows.Views.AttachmentDetailsPage"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:Signal_Windows.Views"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+
+    <!-- https://www.goedware.com/index.php/blog/3-pinch-zoom-image-in-uwp-app -->
+    <FlipView Name="ImageFlipView" ItemsSource="{x:Bind Attachments}" Width="Auto" Height="Auto">
+        <FlipView.ItemTemplate>
+            <DataTemplate>
+                <Image Source="{Binding}" />
+            </DataTemplate>
+        </FlipView.ItemTemplate>
+    </FlipView>
+
+</Page>

Signal-Windows/Views/AttachmentDetailsPage.xaml.cs

@@ -0,0 +1,58 @@
+using Signal_Windows.Models;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.Storage;
+using Windows.UI.Core;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+// The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=234238
+
+namespace Signal_Windows.Views
+{
+    /// <summary>
+    /// An empty page that can be used on its own or navigated to within a Frame.
+    /// </summary>
+    public sealed partial class AttachmentDetailsPage : Page
+    {
+        public ObservableCollection<string> Attachments { get; set; } = new ObservableCollection<string>();
+
+        public AttachmentDetailsPage()
+        {
+            this.InitializeComponent();
+        }
+
+        public string Path { get; set; }
+
+        protected override void OnNavigatedTo(NavigationEventArgs e)
+        {
+            base.OnNavigatedTo(e);
+            Utils.EnableBackButton(BackButton_Click);
+            Attachments.Clear();
+            Attachments.Add($"{ApplicationData.Current.LocalCacheFolder.Path}/Attachments/{(e.Parameter as SignalAttachment).Id}.plain");
+        }
+
+        protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
+        {
+            base.OnNavigatingFrom(e);
+            Utils.DisableBackButton(BackButton_Click);
+        }
+
+        private void BackButton_Click(object sender, BackRequestedEventArgs e)
+        {
+            Frame.GoBack();
+            e.Handled = true;
+        }
+    }
+}