Update rail icons.

Signal/Images.xcassets/x-24.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "x-24@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "x-24@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "x-24@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

SignalMessaging/ViewControllers/AttachmentApprovalViewController.swift

@@ -1676,12 +1676,14 @@ public class ApprovalRailCellView: GalleryRailCellView {
             strongSelf.approvalRailCellDelegate?.approvalRailCellView(strongSelf, didRemoveItem: attachmentItem)
         }
 
-        button.setImage(#imageLiteral(resourceName: "ic_circled_x"), for: .normal)
-
-        let kInsetDistance: CGFloat = 5
-        button.imageEdgeInsets = UIEdgeInsets(top: kInsetDistance, left: kInsetDistance, bottom: kInsetDistance, right: kInsetDistance)
-
-        let kButtonWidth: CGFloat = 24 + kInsetDistance * 2
+        button.setImage(UIImage(named: "x-24")?.withRenderingMode(.alwaysTemplate), for: .normal)
+        button.tintColor = .white
+        button.layer.shadowColor = UIColor.black.cgColor
+        button.layer.shadowRadius = 2
+        button.layer.shadowOpacity = 0.66
+        button.layer.shadowOffset = .zero
+
+        let kButtonWidth: CGFloat = 24
         button.autoSetDimensions(to: CGSize(width: kButtonWidth, height: kButtonWidth))
 
         return button
@@ -1704,8 +1706,8 @@ public class ApprovalRailCellView: GalleryRailCellView {
         if isSelected {
             addSubview(deleteButton)
 
-            deleteButton.autoPinEdge(toSuperviewEdge: .top, withInset: -12)
-            deleteButton.autoPinEdge(toSuperviewEdge: .trailing, withInset: -8)
+            deleteButton.autoPinEdge(toSuperviewEdge: .top, withInset: cellBorderWidth)
+            deleteButton.autoPinEdge(toSuperviewEdge: .trailing, withInset: cellBorderWidth + 4)
         } else {
             deleteButton.removeFromSuperview()
         }
@@ -1726,8 +1728,8 @@ public class ApprovalRailCellView: GalleryRailCellView {
         if hasCaption {
             addSubview(captionIndicator)
 
-            captionIndicator.autoPinEdge(toSuperviewEdge: .top, withInset: 2)
-            captionIndicator.autoPinEdge(toSuperviewEdge: .leading, withInset: 6)
+            captionIndicator.autoPinEdge(toSuperviewEdge: .top, withInset: cellBorderWidth)
+            captionIndicator.autoPinEdge(toSuperviewEdge: .leading, withInset: cellBorderWidth + 4)
         } else {
             captionIndicator.removeFromSuperview()
         }

SignalMessaging/Views/GalleryRailView.swift

@@ -63,17 +63,18 @@ public class GalleryRailCellView: UIView {
 
     private(set) var isSelected: Bool = false
 
+    public let cellBorderWidth: CGFloat = 2
+
     func setIsSelected(_ isSelected: Bool) {
-        let borderWidth: CGFloat = 2
         self.isSelected = isSelected
 
         // Reserve space for the selection border whether or not the cell is selected.
-        layoutMargins = UIEdgeInsets(top: 0, left: borderWidth, bottom: 0, right: borderWidth)
+        layoutMargins = UIEdgeInsets(top: 0, left: cellBorderWidth, bottom: 0, right: cellBorderWidth)
 
         if isSelected {
             imageView.layer.borderColor = Theme.galleryHighlightColor.cgColor
-            imageView.layer.borderWidth = borderWidth
-            imageView.layer.cornerRadius = borderWidth
+            imageView.layer.borderWidth = cellBorderWidth
+            imageView.layer.cornerRadius = cellBorderWidth
         } else {
             imageView.layer.borderWidth = 0
             imageView.layer.cornerRadius = 0