From 2febb37a8ed7867f178ee7b47d2922838b4079d1 Mon Sep 17 00:00:00 2001
From: Shadowfacts <me@shadowfacts.net>
Date: Sun, 23 Apr 2023 21:55:14 -0400
Subject: [PATCH] Let duckable VCs prevent ducking

---
 Packages/Duckable/Sources/Duckable/API.swift                 | 3 +++
 .../Sources/Duckable/DuckableContainerViewController.swift   | 5 ++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Packages/Duckable/Sources/Duckable/API.swift b/Packages/Duckable/Sources/Duckable/API.swift
index b3d0ebca..fb6da599 100644
--- a/Packages/Duckable/Sources/Duckable/API.swift
+++ b/Packages/Duckable/Sources/Duckable/API.swift
@@ -10,6 +10,8 @@ import UIKit
 public protocol DuckableViewController: UIViewController {
     var duckableDelegate: DuckableViewControllerDelegate? { get set }
     
+    func duckableViewControllerShouldDuck() -> Bool
+    
     func duckableViewControllerMayAttemptToDuck()
     
     func duckableViewControllerWillAnimateDuck(withDuration duration: CGFloat, afterDelay delay: CGFloat)
@@ -18,6 +20,7 @@ public protocol DuckableViewController: UIViewController {
 }
 
 extension DuckableViewController {
+    public func duckableViewControllerShouldDuck() -> Bool { true }
     public func duckableViewControllerMayAttemptToDuck() {}
     public func duckableViewControllerWillAnimateDuck(withDuration duration: CGFloat, afterDelay delay: CGFloat) {}
     public func duckableViewControllerDidFinishAnimatingDuck() {}
diff --git a/Packages/Duckable/Sources/Duckable/DuckableContainerViewController.swift b/Packages/Duckable/Sources/Duckable/DuckableContainerViewController.swift
index 57946ece..f22baf5c 100644
--- a/Packages/Duckable/Sources/Duckable/DuckableContainerViewController.swift
+++ b/Packages/Duckable/Sources/Duckable/DuckableContainerViewController.swift
@@ -135,6 +135,10 @@ public class DuckableContainerViewController: UIViewController, DuckableViewCont
         guard case .presentingDucked(let viewController, isFirstPresentation: _) = state else {
             return
         }
+        guard viewController.duckableViewControllerShouldDuck() else {
+            viewController.sheetPresentationController!.selectedDetentIdentifier = .large
+            return
+        }
         let placeholder = createPlaceholderForDuckedViewController(viewController)
         state = .ducked(viewController, placeholder: placeholder)
         configureChildForDuckedPlaceholder()
@@ -235,4 +239,3 @@ extension DuckableContainerViewController: UISheetPresentationControllerDelegate
         }
     }
 }
-