Add cost parameter and use MediaSource internally

- Add cost parameter to NSCache setObject calls for memory management
- Convert URL to MediaSource once in MatrixClient.loadImage()
- Update .gitignore to exclude build/ directory

Author: beezly

.gitignore

@@ -1,2 +1,3 @@
 xcuserdata/
 .DS_Store
+build/

Mactrix/Models/MatrixClient.swift

@@ -255,19 +255,21 @@ extension MatrixClient: UI.ImageLoader {
             return Image(nsImage: cached)
         }
 
+        let mediaSource = try MediaSource.fromUrl(url: matrixUrl)
+
         let imageData: Data
         if let size {
             let width = UInt64(size.width)
             let height = UInt64(size.height)
-            imageData = try await client.getMediaThumbnail(mediaSource: .fromUrl(url: matrixUrl), width: UInt64(width), height: UInt64(height))
+            imageData = try await client.getMediaThumbnail(mediaSource: mediaSource, width: width, height: height)
         } else {
-            imageData = try await client.getMediaContent(mediaSource: .fromUrl(url: matrixUrl))
+            imageData = try await client.getMediaContent(mediaSource: mediaSource)
         }
 
         do {
             let image = try imageData.toOrientedImage(contentType: imageData.computeMimeType())
             if let nsImage = NSImage(data: imageData) {
-                Self.imageCache.setObject(nsImage, forKey: cacheKey)
+                Self.imageCache.setObject(nsImage, forKey: cacheKey, cost: imageData.count)
             }
             return image
         } catch {

Mactrix/Views/ChatView/MessageImageView.swift

@@ -107,7 +107,7 @@ struct MessageImageView: View {
                 imageData = data
                 image = try data.toOrientedImage(contentType: contentType)
                 if let nsImage = NSImage(data: data) {
-                    MatrixClient.imageCache.setObject(nsImage, forKey: cacheKey)
+                    MatrixClient.imageCache.setObject(nsImage, forKey: cacheKey, cost: data.count)
                 }
             } catch {
                 errorMessage = error.localizedDescription

Mactrix/Views/MatrixImageView.swift

@@ -60,7 +60,7 @@ struct MatrixImageView: View {
                     let contentType = mimeType.flatMap { UTType(mimeType: $0) }
                     image = try await Image(importing: data, contentType: contentType)
                     if let nsImage = NSImage(data: data) {
-                        MatrixClient.imageCache.setObject(nsImage, forKey: cacheKey)
+                        MatrixClient.imageCache.setObject(nsImage, forKey: cacheKey, cost: data.count)
                     }
                 } catch {
                     errorMessage = error.localizedDescription