Let result provider determine should use big thumbnail

Author: VictoriousRaptor

Flow.Launcher.Plugin/Result.cs

@@ -82,9 +82,14 @@ public string IcoPath
         public bool RoundedIcon { get; set; } = false;
 
         /// <summary>
-        /// Full image used for preview window
+        /// Full image used for preview panel
         /// </summary>
-        public string PreviewImage { get; set; }
+        public string PreviewImage { get; set; } = null;
+
+        /// <summary>
+        /// Determines if the preview image should occupy the full width of the preveiw panel.
+        /// </summary>
+        public bool UseBigThumbnail { get; set; } = false;
 
         /// <summary>
         /// Delegate function, see <see cref="Icon"/>
@@ -234,5 +239,23 @@ public ValueTask<bool> ExecuteAsync(ActionContext context)
         /// </summary>
         /// <default>#26a0da (blue)</default>
         public string ProgressBarColor { get; set; } = "#26a0da";
+
+        /// <summary>
+        /// Suggests a result's file extension should use full width of the default preview panel.
+        /// </summary>
+        /// <param name="extension">File extension. Dot included.</param>
+        public static bool ShouldUseBigThumbnail(string extension)
+        {
+            return extension is ".jpg"
+                or ".png"
+                or ".avi"
+                or ".mkv"
+                or ".bmp"
+                or ".gif"
+                or ".wmv"
+                or ".mp3"
+                or ".flac"
+                or ".mp4";
+        }
     }
 }

Flow.Launcher/ViewModel/ResultViewModel.cs

@@ -9,7 +9,6 @@
 using System.IO;
 using System.Drawing.Text;
 using System.Collections.Generic;
-using System.Drawing;
 
 namespace Flow.Launcher.ViewModel
 {
@@ -28,13 +27,6 @@ public ResultViewModel(Result result, Settings settings)
             }
             Result = result;
 
-            var extension = Path.GetExtension(result.PreviewImage);
-            if (!string.IsNullOrEmpty(extension))
-            {
-                // only when explicitly specified PreviewImage
-                UseBigThumbnail = IsMedia(extension.ToLowerInvariant());
-            }
-
             if (Result.Glyph is { FontFamily: not null } glyph)
             {
                 // Checks if it's a system installed font, which does not require path to be provided. 
@@ -177,21 +169,7 @@ public ImageSource PreviewImage
         /// <summary>
         /// Determines if to use the full width of the preview panel
         /// </summary>
-        public bool UseBigThumbnail { get; set; } = false;
-
-        public static bool IsMedia(string extension)
-        {
-            return extension is ".jpg"
-                or ".png"
-                or ".avi"
-                or ".mkv"
-                or ".bmp"
-                or ".gif"
-                or ".wmv"
-                or ".mp3"
-                or ".flac"
-                or ".mp4";
-        }
+        public bool UseBigThumbnail => Result.UseBigThumbnail;
 
         public GlyphInfo Glyph { get; set; }