From dde5daf00891896d803deb860575a9e0337941c7 Mon Sep 17 00:00:00 2001
From: John Sundell <john@sundell.co>
Date: Wed, 2 Oct 2024 14:57:49 +0200
Subject: [PATCH] Add option to customize spacing applied to SwiftUI-based
 paywall footer

This patch makes it possible for API users to customize the amount
of spacing that's applied to a `PaywallView` when presented as a
footer using the `paywallFooter` SwiftUI modifier. That API uses
SwiftUI's `safeAreaInset` modifier internally, which by default
adds a system-defined amount of spacing between the view placed
within the safe area inset and the host view that the modifier is
applied to. With this change, API users are now free to remove or
modify that spacing, which is required for certain app designs.

This is a backward-compatible change, as the added `spacing`
parameter is optional with a default value of `nil`, which retains
the existing behavior when the new parameter isn't passed by the
API user.
---
 RevenueCatUI/Data/PaywallViewConfiguration.swift | 3 +++
 RevenueCatUI/View+PresentPaywallFooter.swift     | 6 +++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/RevenueCatUI/Data/PaywallViewConfiguration.swift b/RevenueCatUI/Data/PaywallViewConfiguration.swift
index f29dfe6572..0a3a6bd62c 100644
--- a/RevenueCatUI/Data/PaywallViewConfiguration.swift
+++ b/RevenueCatUI/Data/PaywallViewConfiguration.swift
@@ -18,6 +18,7 @@ struct PaywallViewConfiguration {
     var customerInfo: CustomerInfo?
     var mode: PaywallViewMode
     var fonts: PaywallFontProvider
+    var spacing: CGFloat?
     var displayCloseButton: Bool
     var introEligibility: TrialOrIntroEligibilityChecker?
     var purchaseHandler: PurchaseHandler
@@ -28,6 +29,7 @@ struct PaywallViewConfiguration {
         customerInfo: CustomerInfo? = nil,
         mode: PaywallViewMode = .default,
         fonts: PaywallFontProvider = DefaultPaywallFontProvider(),
+        spacing: CGFloat? = nil,
         displayCloseButton: Bool = false,
         introEligibility: TrialOrIntroEligibilityChecker? = nil,
         purchaseHandler: PurchaseHandler,
@@ -37,6 +39,7 @@ struct PaywallViewConfiguration {
         self.customerInfo = customerInfo
         self.mode = mode
         self.fonts = fonts
+        self.spacing = spacing
         self.displayCloseButton = displayCloseButton
         self.introEligibility = introEligibility
         self.purchaseHandler = purchaseHandler
diff --git a/RevenueCatUI/View+PresentPaywallFooter.swift b/RevenueCatUI/View+PresentPaywallFooter.swift
index 8e23ca9c5d..270514673d 100644
--- a/RevenueCatUI/View+PresentPaywallFooter.swift
+++ b/RevenueCatUI/View+PresentPaywallFooter.swift
@@ -81,6 +81,7 @@ extension View {
     public func paywallFooter(
         condensed: Bool = false,
         fonts: PaywallFontProvider = DefaultPaywallFontProvider(),
+        spacing: CGFloat? = nil,
         myAppPurchaseLogic: MyAppPurchaseLogic? = nil,
         purchaseStarted: PurchaseOfPackageStartedHandler? = nil,
         purchaseCompleted: PurchaseOrRestoreCompletedHandler? = nil,
@@ -97,6 +98,7 @@ extension View {
             customerInfo: nil,
             condensed: condensed,
             fonts: fonts,
+            spacing: spacing,
             introEligibility: nil,
             purchaseHandler: purchaseHandler,
             purchaseStarted: purchaseStarted,
@@ -206,6 +208,7 @@ extension View {
         customerInfo: CustomerInfo?,
         condensed: Bool = false,
         fonts: PaywallFontProvider = DefaultPaywallFontProvider(),
+        spacing: CGFloat? = nil,
         introEligibility: TrialOrIntroEligibilityChecker? = nil,
         purchaseHandler: PurchaseHandler,
         purchaseStarted: PurchaseOfPackageStartedHandler? = nil,
@@ -224,6 +227,7 @@ extension View {
                         customerInfo: customerInfo,
                         mode: condensed ? .condensedFooter : .footer,
                         fonts: fonts,
+                        spacing: spacing,
                         displayCloseButton: false,
                         introEligibility: introEligibility,
                         purchaseHandler: purchaseHandler
@@ -267,7 +271,7 @@ private struct PresentingPaywallFooterModifier: ViewModifier {
 
     func body(content: Content) -> some View {
         content
-            .safeAreaInset(edge: .bottom) {
+            .safeAreaInset(edge: .bottom, spacing: configuration.spacing) {
                 PaywallView(configuration: self.configuration)
                     .onPurchaseStarted {
                         self.purchaseStarted?($0)