Support .dmg

QuickLook.Plugin/QuickLook.Plugin.AppViewer/PackageParsers/Dmg/IcnsParser.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+
+namespace QuickLook.Plugin.AppViewer.PackageParsers.Dmg;
+
+public static class IcnsParser
+{
+    public static Bitmap Parse(byte[] icnsBytes)
+    {
+        // Temporary method
+
+        Assembly assembly = AppDomain.CurrentDomain.GetAssemblies()
+            .Where((assembly) => assembly.FullName.StartsWith("QuickLook.Plugin.ImageViewer"))
+            .FirstOrDefault();
+
+        if (assembly == null)
+            return null;
+
+        Type type = assembly.GetTypes()
+            .Where(type => type.Name.StartsWith("IcnsImageParser"))
+            .FirstOrDefault();
+
+        if (type == null)
+            return null;
+
+        MethodInfo method = type.GetMethods(BindingFlags.Public | BindingFlags.Static)
+            .Where(method => method.Name == "GetImages"
+                && method.GetParameters().FirstOrDefault()?.ParameterType == typeof(Stream))
+            .FirstOrDefault();
+
+        if (method == null)
+            return null;
+
+        using MemoryStream stream = new(icnsBytes);
+        dynamic[] images = method.Invoke(null, [stream]) as dynamic[];
+        List<Bitmap> bitmaps = [];
+
+        foreach (dynamic image in images)
+        {
+            if (image.GetType().GetProperty("Bitmap") is PropertyInfo property)
+            {
+                var bitmap = property.GetValue(image);
+                bitmaps.Add(bitmap);
+            }
+        }
+
+        Bitmap imageResult = bitmaps
+            .Where(bitmap => bitmap != null)
+            .OrderByDescending(bitmap => bitmap.Width)
+            .FirstOrDefault()
+            ?.Clone() as Bitmap;
+
+        foreach (dynamic image in images)
+        {
+            if (image.GetType().GetProperty("Bitmap") is PropertyInfo property)
+            {
+                if (property.GetValue(image) is IDisposable disposable)
+                {
+                    disposable.Dispose();
+                }
+            }
+        }
+
+        return imageResult;
+    }
+}