Tusker/Packages/Duckable/Sources/Duckable/Swizzler.swift

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//
// Swizzler.swift
// Duckable
//
// Created by Shadowfacts on 11/7/22.
//
import UIKit
import os.log
private var hasInitialized = false
var isDetentChangingDueToGrabberAction = false
@available(iOS 16.0, *)
func swizzleSheetController() {
guard !hasInitialized else {
return
}
hasInitialized = true
var originalIMP: IMP?
let imp = imp_implementationWithBlock({ (self: UISheetPresentationController, param: AnyObject) in
let original = unsafeBitCast(originalIMP!, to: (@convention(c) (UISheetPresentationController, AnyObject) -> Void).self)
isDetentChangingDueToGrabberAction = true
original(self, param)
isDetentChangingDueToGrabberAction = false
} as @convention(block) (UISheetPresentationController, AnyObject) -> Void)
let sel = [":", "PrimaryAction", "GrabberDidTrigger", "dropShadowView", "_"].reversed().joined()
originalIMP = class_replaceMethod(UISheetPresentationController.self, Selector(sel), imp, "v@:@")
if originalIMP == nil {
os_log(.fault, log: .default, "Unable to initialize Duckable grabber tap hook")
}
}