GUI: Add support for opening APK and IPA package files

Il2CppInspector.GUI/App.xaml.cs

@@ -29,11 +29,32 @@ namespace Il2CppInspectorGUI
 
         private void StatusUpdate(object sender, string status) => OnStatusUpdate?.Invoke(sender, status);
 
+        // Attempt to load an IL2CPP application package (APK or IPA)
+        public async Task<bool> LoadPackageAsync(string packageFile) {
+            try {
+                var streams = Inspector.GetStreamsFromPackage(packageFile);
+                if (streams == null)
+                    throw new InvalidOperationException("The supplied package is not an APK or IPA file, or does not contain an IL2CPP application");
+
+                return await LoadMetadataAsync(streams.Value.Metadata) && await LoadBinaryAsync(streams.Value.Binary);
+            }
+            catch (Exception ex) {
+                LastException = ex;
+                return false;
+            }
+        }
+
         // Attempt to load an IL2CPP metadata file
-        public Task<bool> LoadMetadataAsync(string metadataFile) =>
+        public async Task<bool> LoadMetadataAsync(string metadataFile) {
+            var stream = new MemoryStream(await File.ReadAllBytesAsync(metadataFile));
+            return await LoadMetadataAsync(stream);
+        }
+
+        public Task<bool> LoadMetadataAsync(Stream metadataStream) =>
             Task.Run(() => {
                 try {
-                    metadata = new Metadata(new MemoryStream(File.ReadAllBytes(metadataFile)));
+                    OnStatusUpdate?.Invoke(this, "Processing metadata");
+                    metadata = new Metadata(metadataStream);
                     return true;
                 }
                 catch (Exception ex) {
@@ -42,11 +63,17 @@ namespace Il2CppInspectorGUI
                 }
             });
 
-        public Task<bool> LoadBinaryAsync(string binaryFile) =>
+        // Attempt to load an IL2CPP binary file
+        public async Task<bool> LoadBinaryAsync(string binaryFile) {
+            var stream = new MemoryStream(await File.ReadAllBytesAsync(binaryFile));
+            return await LoadBinaryAsync(stream);
+        }
+
+        public Task<bool> LoadBinaryAsync(Stream binaryStream) =>
             Task.Run(() => {
                 try {
                     // This may throw other exceptions from the individual loaders as well
-                    IFileFormatReader stream = FileFormatReader.Load(binaryFile, StatusUpdate);
+                    IFileFormatReader stream = FileFormatReader.Load(binaryStream, StatusUpdate);
                     if (stream == null) {
                         throw new InvalidOperationException("Could not determine the binary file format");
                     }

Il2CppInspector.GUI/MainWindow.xaml

@@ -360,7 +360,7 @@
                 <Style>
                     <Setter Property="Rectangle.Visibility" Value="Hidden"></Setter>
                     <Style.Triggers>
-                        <DataTrigger Binding="{Binding ElementName=btnSelectMetadataFile, Path=Visibility}" Value="Visible">
+                        <DataTrigger Binding="{Binding ElementName=grdFirstPage, Path=Visibility}" Value="Visible">
                             <Setter Property="Rectangle.Visibility" Value="Visible" />
                         </DataTrigger>
                         <DataTrigger Binding="{Binding ElementName=btnSelectBinaryFile, Path=Visibility}" Value="Visible">
@@ -375,7 +375,29 @@
         </Rectangle>
 
         <!-- Light boxes -->
-        <Button Name="btnSelectMetadataFile" Style="{StaticResource LightBoxButton}" Margin="100" Click="BtnSelectMetadataFile_OnClick" Visibility="Visible">Select an IL2CPP metadata file</Button>
+        <Grid Name="grdFirstPage">
+            <Grid.RowDefinitions>
+                <RowDefinition Height ="*" />
+                <RowDefinition Height ="*" />
+            </Grid.RowDefinitions>
+
+            <Button Grid.Row="0" Name="btnSelectMetadataFile" Style="{StaticResource LightBoxButton}" Margin="100,100,100,50" Click="BtnSelectMetadataFile_OnClick">
+                <TextBlock TextAlignment="Center">
+                    <TextBlock FontSize="22">Option 1</TextBlock>
+                    <LineBreak/>
+                    <TextBlock>Select an IL2CPP metadata file</TextBlock>
+                </TextBlock>
+            </Button>
+            <Button Grid.Row="1" Name="btnSelectPackageFile" Style="{StaticResource LightBoxButton}" Margin="100,50,100,100" Click="BtnSelectPackageFile_OnClick">
+                <TextBlock TextAlignment="Center">
+                    <TextBlock FontSize="22">Option 2</TextBlock>
+                    <LineBreak/>
+                    <TextBlock>Select an APK or IPA file</TextBlock>
+                    <LineBreak/>
+                    <TextBlock FontSize="16">Encrypted IPA files are not supported</TextBlock>
+                </TextBlock>
+            </Button>
+        </Grid>
         <Button Name="btnSelectBinaryFile" Style="{StaticResource LightBoxButton}" Margin="100" Click="BtnSelectBinaryFile_OnClick" Visibility="Hidden">Select an IL2CPP binary file</Button>
 
         <!-- Back button -->
@@ -384,7 +406,7 @@
                 <Style BasedOn="{StaticResource LightBoxButton}" TargetType="{x:Type Button}">
                     <Setter Property="Visibility" Value="Hidden"></Setter>
                     <Style.Triggers>
-                        <DataTrigger Binding="{Binding ElementName=btnSelectMetadataFile, Path=Visibility}" Value="Hidden">
+                        <DataTrigger Binding="{Binding ElementName=grdFirstPage, Path=Visibility}" Value="Hidden">
                             <Setter Property="Button.Visibility" Value="Visible"/>
                         </DataTrigger>
                         <DataTrigger Binding="{Binding ElementName=areaBusyIndicator, Path=Visibility}" Value="Visible">

Il2CppInspector.GUI/MainWindow.xaml.cs

@@ -72,9 +72,8 @@ namespace Il2CppInspectorGUI
             };
 
             if (openFileDialog.ShowDialog() == true) {
-                txtBusyStatus.Text = "Processing metadata...";
                 areaBusyIndicator.Visibility = Visibility.Visible;
-                btnSelectMetadataFile.Visibility = Visibility.Hidden;
+                grdFirstPage.Visibility = Visibility.Hidden;
 
                 // Load the metadata file
                 if (await app.LoadMetadataAsync(openFileDialog.FileName)) {
@@ -84,7 +83,7 @@ namespace Il2CppInspectorGUI
                 }
                 else {
                     areaBusyIndicator.Visibility = Visibility.Hidden;
-                    btnSelectMetadataFile.Visibility = Visibility.Visible;
+                    grdFirstPage.Visibility = Visibility.Visible;
                     MessageBox.Show(this, app.LastException.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
                 }
             }
@@ -117,7 +116,39 @@ namespace Il2CppInspectorGUI
                 else {
                     areaBusyIndicator.Visibility = Visibility.Hidden;
                     btnSelectBinaryFile.Visibility = Visibility.Visible;
-                    MessageBox.Show(this, "Something went wrong! " + app.LastException.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+                    MessageBox.Show(this, app.LastException.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Select APK or IPA package file
+        /// </summary>
+        private async void BtnSelectPackageFile_OnClick(object sender, RoutedEventArgs e) {
+            var app = (App) Application.Current;
+
+            var openFileDialog = new OpenFileDialog {
+                Filter = "Android/iOS Application Package (*.apk;*.ipa;*.zip)|*.apk;*.ipa;*.zip|All files (*.*)|*.*",
+                CheckFileExists = true
+            };
+
+            if (openFileDialog.ShowDialog() == true) {
+                txtBusyStatus.Text = "Extracting package...";
+                areaBusyIndicator.Visibility = Visibility.Visible;
+                grdFirstPage.Visibility = Visibility.Hidden;
+
+                // Load the package
+                if (await app.LoadPackageAsync(openFileDialog.FileName)) {
+                    // Package loaded successfully
+                    areaBusyIndicator.Visibility = Visibility.Hidden;
+
+                    lstImages.ItemsSource = app.Il2CppModels;
+                    lstImages.SelectedIndex = 0;
+                }
+                else {
+                    areaBusyIndicator.Visibility = Visibility.Hidden;
+                    grdFirstPage.Visibility = Visibility.Visible;
+                    MessageBox.Show(this, app.LastException.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
                 }
             }
         }
@@ -128,7 +159,7 @@ namespace Il2CppInspectorGUI
         private void BtnBack_OnClick(object sender, RoutedEventArgs e) {
             lstImages.ItemsSource = null;
             btnSelectBinaryFile.Visibility = Visibility.Hidden;
-            btnSelectMetadataFile.Visibility = Visibility.Visible;
+            grdFirstPage.Visibility = Visibility.Visible;
         }
 
         /// <summary>