EmergeTools · noahsmartin · Dec 27, 2023 · Dec 26, 2023
diff --git a/Example/Pow Example.xcodeproj/project.pbxproj b/Example/Pow Example.xcodeproj/project.pbxproj
@@ -103,6 +103,7 @@
 		54F15E5429D59D250054690B /* PulseExample.swift in Sources */ = {isa = PBXBuildFile; fileRef = 54F15E5329D59D250054690B /* PulseExample.swift */; };
 		54F15E5629D5A0D70054690B /* GlowExample.swift in Sources */ = {isa = PBXBuildFile; fileRef = 54F15E5529D5A0D70054690B /* GlowExample.swift */; };
 		B7A5DA8D2B0E853A0035FC0A /* Pow in Frameworks */ = {isa = PBXBuildFile; productRef = B7A5DA8C2B0E853A0035FC0A /* Pow */; };
+		FA13B8ED2B3BAF5600F58836 /* SnapshotPreferences in Frameworks */ = {isa = PBXBuildFile; productRef = FA13B8EC2B3BAF5600F58836 /* SnapshotPreferences */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -212,6 +213,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				B7A5DA8D2B0E853A0035FC0A /* Pow in Frameworks */,
+				FA13B8ED2B3BAF5600F58836 /* SnapshotPreferences in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -420,6 +422,7 @@
 			name = "Pow Example";
 			packageProductDependencies = (
 				B7A5DA8C2B0E853A0035FC0A /* Pow */,
+				FA13B8EC2B3BAF5600F58836 /* SnapshotPreferences */,
 			);
 			productName = "Pow Example";
 			productReference = 546A2986292A31BB00A80DE2 /* Pow Example.app */;
@@ -450,6 +453,7 @@
 			);
 			mainGroup = 546A297D292A31BB00A80DE2;
 			packageReferences = (
+				FA13B8EB2B3BAF5600F58836 /* XCRemoteSwiftPackageReference "SnapshotPreviews-iOS" */,
 			);
 			productRefGroup = 546A2987292A31BB00A80DE2 /* Products */;
 			projectDirPath = "";
@@ -777,11 +781,27 @@
 		};
 /* End XCConfigurationList section */
 
+/* Begin XCRemoteSwiftPackageReference section */
+		FA13B8EB2B3BAF5600F58836 /* XCRemoteSwiftPackageReference "SnapshotPreviews-iOS" */ = {
+			isa = XCRemoteSwiftPackageReference;
+			repositoryURL = "https://github.com/EmergeTools/SnapshotPreviews-iOS";
+			requirement = {
+				kind = exactVersion;
+				version = 0.7.6;
+			};
+		};
+/* End XCRemoteSwiftPackageReference section */
+
 /* Begin XCSwiftPackageProductDependency section */
 		B7A5DA8C2B0E853A0035FC0A /* Pow */ = {
 			isa = XCSwiftPackageProductDependency;
 			productName = Pow;
 		};
+		FA13B8EC2B3BAF5600F58836 /* SnapshotPreferences */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = FA13B8EB2B3BAF5600F58836 /* XCRemoteSwiftPackageReference "SnapshotPreviews-iOS" */;
+			productName = SnapshotPreferences;
+		};
 /* End XCSwiftPackageProductDependency section */
 	};
 	rootObject = 546A297E292A31BB00A80DE2 /* Project object */;

diff --git a/Example/Pow Example/Examples/Screens/CheckoutExample.swift b/Example/Pow Example/Examples/Screens/CheckoutExample.swift
@@ -1,5 +1,6 @@
 import Pow
 import SwiftUI
+import SnapshotPreferences
 
 struct CheckoutExample: View, Example {
     enum PaymentError: Error {
@@ -271,5 +272,6 @@ struct CheckoutExample_Previews: PreviewProvider {
             CheckoutExample()
                 .toolbar(.visible, for: .navigationBar)
         }
+        .emergeSnapshotPrecision(0.99)
     }
 }
diff --git a/Fastlane/Fastfile b/Fastlane/Fastfile
@@ -3,6 +3,10 @@ fastlane_require 'git'
 default_platform(:ios)
 
 def build_for_config(config)
+
+  package_file = "../Package.swift"
+  `sed -i '' 's/let enablePreviews = .*/let enablePreviews = #{config == "Debug" ? "true" : "false"}/' "#{package_file}"`
+
   g = Git.open('.')
   build_app(
     project: "./Example/Pow Example.xcodeproj",

diff --git a/Package.swift b/Package.swift
@@ -3,6 +3,8 @@
 
 import PackageDescription
 
+let enablePreviews = false
+
 let package = Package(
     name: "Pow",
     platforms: [
@@ -19,13 +21,15 @@ let package = Package(
     dependencies: [
         // Dependencies declare other packages that this package depends on.
         // .package(url: /* package url */, from: "1.0.0"),
+      .package(url: "https://github.com/EmergeTools/SnapshotPreviews-iOS", exact: "0.7.6")
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
         // Targets can depend on other targets in this package, and on products in packages this package depends on.
         .target(
             name: "Pow",
-            dependencies: []),
+            dependencies: enablePreviews ? [.product(name: "SnapshotPreferences", package: "SnapshotPreviews-iOS", condition: .when(platforms: [.iOS]))] : [],
+            swiftSettings: enablePreviews ? [.define("EMG_PREVIEWS")] : nil),
         .testTarget(
             name: "PowTests",
             dependencies: ["Pow"]),

diff --git a/Sources/Pow/Effects/SmokeEffect.swift b/Sources/Pow/Effects/SmokeEffect.swift
@@ -1,5 +1,8 @@
 import SwiftUI
 import simd
+#if os(iOS) && EMG_PREVIEWS
+import SnapshotPreferences
+#endif
 
 public extension AnyConditionalEffect {
     /// An effect that emits smoke from the view.
@@ -336,30 +339,35 @@ struct ContinuousParticleEffect_Previews: PreviewProvider {
     }
 
     static var previews: some View {
+      Group {
         Preview()
-            .preferredColorScheme(.dark)
-            .previewDisplayName("Dark")
+          .preferredColorScheme(.dark)
+          .previewDisplayName("Dark")
         Preview()
-            .preferredColorScheme(.light)
-            .previewDisplayName("Light")
+          .preferredColorScheme(.light)
+          .previewDisplayName("Light")
         PreviewS()
-            .preferredColorScheme(.dark)
-            .previewDisplayName("Small")
+          .preferredColorScheme(.dark)
+          .previewDisplayName("Small")
         Preview2()
-            .preferredColorScheme(.dark)
-            .previewDisplayName("Large")
+          .preferredColorScheme(.dark)
+          .previewDisplayName("Large")
         Preview3()
-            .preferredColorScheme(.dark)
-            .previewDisplayName("Particle Layer")
+          .preferredColorScheme(.dark)
+          .previewDisplayName("Particle Layer")
 
-        #if os(iOS)
+#if os(iOS)
         PreviewLayer()
-            .previewDisplayName("Emitter Layer")
-        #endif
+          .previewDisplayName("Emitter Layer")
+#endif
 
         PreviewAlt()
-            .preferredColorScheme(.dark)
-            .previewDisplayName("Emitter Dark")
+          .preferredColorScheme(.dark)
+          .previewDisplayName("Emitter Dark")
+      }
+      #if os(iOS) && EMG_PREVIEWS
+        .emergeSnapshotPrecision(0)
+      #endif
     }
 }
 #endif
diff --git a/Sources/Pow/Transitions/Anvil.swift b/Sources/Pow/Transitions/Anvil.swift
@@ -1,4 +1,7 @@
 import SwiftUI
+#if os(iOS) && EMG_PREVIEWS
+import SnapshotPreferences
+#endif
 
 public extension AnyTransition.MovingParts {
     /// A transition that drops the view down from the top.
@@ -280,6 +283,9 @@ struct Anvil_Previews: PreviewProvider {
                 .navigationBarHidden(true)
         }
         .environment(\.colorScheme, .dark)
+      #if os(iOS) && EMG_PREVIEWS
+        .emergeSnapshotPrecision(0)
+      #endif
     }
 }
 #endif
diff --git a/Sources/Pow/Transitions/Boing.swift b/Sources/Pow/Transitions/Boing.swift
@@ -1,4 +1,7 @@
 import SwiftUI
+#if os(iOS) && EMG_PREVIEWS
+import SnapshotPreferences
+#endif
 
 public extension AnyTransition.MovingParts {
     /// A transition that moves the view down with any overshoot resulting in an
@@ -218,6 +221,9 @@ struct Bounce_Previews: PreviewProvider {
                 .navigationBarHidden(true)
         }
         .environment(\.colorScheme, .dark)
+        #if os(iOS) && EMG_PREVIEWS
+          .emergeSnapshotPrecision(0)
+        #endif
     }
 }
 
@@ -290,6 +296,9 @@ struct Boing_2_Previews: PreviewProvider {
         NavigationView {
             Preview()
         }
+        #if os(iOS) && EMG_PREVIEWS
+          .emergeSnapshotPrecision(0)
+        #endif
     }
 }
 #endif

diff --git a/Sources/Pow/Transitions/Clock.swift b/Sources/Pow/Transitions/Clock.swift
@@ -1,4 +1,7 @@
 import SwiftUI
+#if os(iOS) && EMG_PREVIEWS
+import SnapshotPreferences
+#endif
 
 public extension AnyTransition.MovingParts {
     /// A transition using a clockwise sweep around the centerpoint of the view.
@@ -225,6 +228,9 @@ struct Clock_Previews: PreviewProvider {
                 .navigationBarHidden(true)
         }
         .environment(\.colorScheme, .dark)
+        #if os(iOS) && EMG_PREVIEWS
+          .emergeSnapshotPrecision(0)
+        #endif
     }
 }
 #endif

diff --git a/Sources/Pow/Transitions/Glare.swift b/Sources/Pow/Transitions/Glare.swift
@@ -1,4 +1,7 @@
 import SwiftUI
+#if os(iOS) && EMG_PREVIEWS
+import SnapshotPreferences
+#endif
 
 public extension AnyTransition.MovingParts {
     /// A transitions that shows the view by combining a diagonal wipe with a
@@ -254,6 +257,9 @@ struct Glare_Previews: PreviewProvider {
                 .navigationBarHidden(true)
         }
         .environment(\.colorScheme, .dark)
+        #if os(iOS) && EMG_PREVIEWS
+          .emergeSnapshotPrecision(0)
+        #endif
     }
 }
 #endif
diff --git a/Sources/Pow/Transitions/Skid.swift b/Sources/Pow/Transitions/Skid.swift
@@ -1,4 +1,7 @@
 import SwiftUI
+#if os(iOS) && EMG_PREVIEWS
+import SnapshotPreferences
+#endif
 
 public extension AnyTransition.MovingParts {
     /// The direction from which to animate in during a `skid` transition's insertion.
@@ -182,6 +185,9 @@ struct Skid_Previews: PreviewProvider {
                 .navigationBarHidden(true)
         }
         .environment(\.colorScheme, .dark)
+        #if os(iOS) && EMG_PREVIEWS
+          .emergeSnapshotPrecision(0)
+        #endif
     }
 }
 

diff --git a/Sources/Pow/Transitions/Vanish.swift b/Sources/Pow/Transitions/Vanish.swift
@@ -1,4 +1,7 @@
 import SwiftUI
+#if os(iOS) && EMG_PREVIEWS
+import SnapshotPreferences
+#endif
 
 public extension AnyTransition.MovingParts {
     /// A transition that dissolves the view into many small particles.
@@ -236,6 +239,9 @@ struct Vanish_Previews: PreviewProvider {
                 .navigationBarHidden(true)
         }
         .environment(\.colorScheme, .dark)
+        #if os(iOS) && EMG_PREVIEWS
+          .emergeSnapshotPrecision(0)
+        #endif
     }
 }
 #endif