element-ios/Riot/Categories/UITableViewCell.swift

/*
Copyright 2024 New Vector Ltd.
Copyright 2020 Vector Creations Ltd
Copyright 2014 OpenMarket Ltd

SPDX-License-Identifier: AGPL-3.0-only
Please see LICENSE in the repository root for full details.
 */

import Foundation

extension UITableViewCell {
    
    private enum AccessoryImageAlpha {
        static let highlighted: CGFloat = 0.3
    }

    /// Returns safe area insetted separator inset. Should only be used when custom constraints on custom table view cells are being set according to separator insets.
    @objc var vc_separatorInset: UIEdgeInsets {
        var result = separatorInset
        result.left -= self.safeAreaInsets.left
        result.right -= self.safeAreaInsets.right
        return result
    }
    
    // Hide separator for one cell, otherwise use `tableView.separatorStyle = .none`
    @objc func vc_hideSeparator() {
        self.separatorInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: .greatestFiniteMagnitude)
    }
    
    @objc func vc_setAccessoryDisclosureIndicator(withTintColor tintColor: UIColor) {
        let disclosureImage = Asset.Images.disclosureIcon.image.withRenderingMode(.alwaysTemplate)
        let disclosureImageView = UIImageView(image: disclosureImage)
        disclosureImageView.tintColor = tintColor
        disclosureImageView.highlightedImage = disclosureImage.vc_withAlpha(AccessoryImageAlpha.highlighted)
        self.accessoryView = disclosureImageView
    }        
    
    @objc func vc_setAccessoryDisclosureIndicator(withTheme theme: Theme) {
        self.vc_setAccessoryDisclosureIndicator(withTintColor: theme.textSecondaryColor)
    }
    
    @objc func vc_setAccessoryDisclosureIndicatorWithCurrentTheme() {
        self.vc_setAccessoryDisclosureIndicator(withTheme: ThemeService.shared().theme)
    }

    @objc var vc_parentViewController: UIViewController? {
        var parent: UIResponder? = self
        while parent != nil {
            parent = parent?.next
            if let viewController = parent as? UIViewController {
                return viewController
            }
        }
        return nil
    }
    
}