1 files changed, 98 insertions, 0 deletions
diff --git a/Hotline/Shared/FileImageView.swift b/Hotline/Shared/FileImageView.swift
new file mode 100644
index 0000000..0cc50f1
--- /dev/null
+++ b/Hotline/Shared/FileImageView.swift
@@ -0,0 +1,98 @@
+import SwiftUI
+
+struct FileImageView: NSViewRepresentable {
+  var image: NSImage?
+  
+  let minimumSize: CGSize = CGSize(width: 350, height: 350)
+  let presentationPaddingRatio: Double = 0.5
+  
+  func makeNSView(context: Context) -> NSImageView {
+    let imageView = NSImageView()
+    imageView.imageScaling = .scaleProportionallyUpOrDown
+    imageView.animates = true
+    imageView.isEditable = false
+    imageView.allowsCutCopyPaste = true
+    imageView.setContentCompressionResistancePriority(.defaultLow, for: .vertical)
+    imageView.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
+    
+    if let img = self.image {
+      imageView.image = img
+      DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
+        self.resizeWindowForImageView(imageView)
+      }
+    }
+    
+    return imageView
+  }
+  
+  func updateNSView(_ nsView: NSImageView, context: Context) {
+    nsView.image = self.image
+  }
+  
+  // MARK: -
+  
+  func resizeWindowForImageView(_ imageView: NSImageView) {
+    guard let window = imageView.window, let img = imageView.image else {
+      return
+    }
+    
+    var windowRect = window.contentLayoutRect
+    let windowChromeSize = CGSize(width: window.frame.width - windowRect.width, height: window.frame.height - windowRect.height)
+    
+    var windowMinSize: CGSize = windowRect.size
+    let centerPoint = CGPoint(x: window.frame.midX, y: window.frame.midY)
+    
+    windowRect.size = img.size
+    
+    if let screen = window.screen {
+      var paddedScreenSize = screen.frame.size
+      paddedScreenSize.width *= self.presentationPaddingRatio
+      paddedScreenSize.height *= self.presentationPaddingRatio
+      
+      windowMinSize = aspectFit(source: windowRect.size, bounds: self.minimumSize)
+      windowRect.size = aspectFit(source: windowRect.size, bounds: paddedScreenSize, minimum: windowMinSize)
+    }
+    
+    windowRect.size.width += windowChromeSize.width
+    windowRect.size.height += windowChromeSize.height
+    
+    windowRect.origin.x = centerPoint.x - windowRect.width / 2.0
+    windowRect.origin.y = centerPoint.y - windowRect.height / 2.0
+    
+    window.setFrame(windowRect, display: true, animate: true)
+    
+//    Do these APIs even work??
+//    window.aspectRatio = windowRect.size
+//    window.contentAspectRatio = windowRect.size
+  }
+  
+  func aspectFit(source sourceSize: CGSize, bounds boundingSize: CGSize, minimum minSize: CGSize? = nil) -> CGSize {
+    let sourceAspectRatio = sourceSize.width / sourceSize.height
+    
+    var fitSize: CGSize = sourceSize
+    
+    if fitSize.width > boundingSize.width {
+      fitSize.width = boundingSize.width
+      fitSize.height = fitSize.width / sourceAspectRatio
+    }
+    
+    if fitSize.height > boundingSize.height {
+      fitSize.height = boundingSize.height
+      fitSize.width = fitSize.height * sourceAspectRatio
+    }
+    
+    if let m = minSize {
+      if fitSize.width < m.width {
+        fitSize.width = m.width
+        fitSize.height = fitSize.width / sourceAspectRatio
+      }
+      
+      if fitSize.height < m.height {
+        fitSize.height = m.height
+        fitSize.width = fitSize.height * sourceAspectRatio
+      }
+    }
+    
+    return fitSize
+  }
+}