84 lines
3.1 KiB
Swift
84 lines
3.1 KiB
Swift
//
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// Copyright (c) 2022 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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import UIKit
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open class OWSTableSheetViewController: InteractiveSheetViewController {
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public let tableViewController = OWSTableViewController2()
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public override var interactiveScrollViews: [UIScrollView] { [tableViewController.tableView] }
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open override var sheetBackgroundColor: UIColor {
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OWSTableViewController2.tableBackgroundColor(isUsingPresentedStyle: true)
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}
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private var contentSizeHeight: CGFloat {
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let tableView = tableViewController.tableView
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// The `adjustedContentInset` property diverges from its stable value during
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// interactive dismiss operations. This causes weird drag/height jump behavior.
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// Instead, compute the height using `view.safeAreaInsets`, which remains stable
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// during animations. (Note that `.top` isn't considered here since
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// `maximumHeight` prevents the view's height from extending into top safe area.)
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return tableView.contentSize.height + tableView.contentInset.totalHeight + view.safeAreaInsets.bottom
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}
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public override var minimizedHeight: CGFloat {
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return min(contentSizeHeight, maximizedHeight)
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}
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public override var maximizedHeight: CGFloat {
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min(contentSizeHeight, CurrentAppContext().frame.height - (view.safeAreaInsets.top + 32))
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}
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public required init() {
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super.init()
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tableViewController.shouldDeferInitialLoad = false
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}
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public override func viewDidLoad() {
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super.viewDidLoad()
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addChild(tableViewController)
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contentView.addSubview(tableViewController.view)
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tableViewController.view.autoPinEdgesToSuperviewEdges()
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updateViewState()
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}
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public override func viewDidLayoutSubviews() {
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super.viewDidLayoutSubviews()
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updateViewState()
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}
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private var previousMinimizedHeight: CGFloat?
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private var previousSafeAreaInsets: UIEdgeInsets?
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public func updateViewState() {
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if previousSafeAreaInsets != tableViewController.view.safeAreaInsets {
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updateTableContents()
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previousSafeAreaInsets = tableViewController.view.safeAreaInsets
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}
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// The table view might not have its final size when this method is called.
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// Run a layout pass so that we compute the correct height constraints.
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self.tableViewController.tableView.layoutIfNeeded()
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// This comparison isn't redundant: assigning same value to `heightConstraint.constant`
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// triggers a layout cycle and therefore this method, where height being reset to a previous value,
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// killing interactive dismiss.
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let minimizedHeight = minimizedHeight
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if minimizedHeight != previousMinimizedHeight {
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heightConstraint.constant = minimizedHeight
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previousMinimizedHeight = minimizedHeight
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}
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maxHeightConstraint.constant = maximizedHeight
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}
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public override func themeDidChange() {
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super.themeDidChange()
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updateTableContents()
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}
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open func updateTableContents(shouldReload: Bool = true) {
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}
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}
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