141 lines
5.1 KiB
Swift
141 lines
5.1 KiB
Swift
//
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// Copyright 2022 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import SignalServiceKit
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class ImageEditorTopBar: MediaTopBar {
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let undoButton = RoundMediaButton(
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image: UIImage(imageLiteralResourceName: "undo-28"),
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backgroundStyle: .blur
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)
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var isUndoButtonHidden: Bool {
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get { undoButton.alpha == 0 }
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set { undoButton.alpha = newValue ? 0 : 1 }
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}
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let clearAllButton = RoundMediaButton(image: nil, backgroundStyle: .blur)
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var isClearAllButtonHidden: Bool {
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get { clearAllButton.alpha == 0 }
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set { clearAllButton.alpha = newValue ? 0 : 1 }
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}
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override init(frame: CGRect) {
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super.init(frame: frame)
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let clearAllButtonTitle =
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OWSLocalizedString("MEDIA_EDITOR_CLEAR_ALL",
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comment: "Title for the button that discards all edits in media editor.")
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clearAllButton.setTitle(clearAllButtonTitle, for: .normal)
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clearAllButton.ows_contentEdgeInsets = UIEdgeInsets(hMargin: 26, vMargin: 15)
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let stackView = UIStackView(arrangedSubviews: [ undoButton, UIView.hStretchingSpacer(), clearAllButton ])
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for button in stackView.arrangedSubviews {
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button.setContentHuggingPriority(.defaultHigh, for: .vertical)
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button.setCompressionResistanceVerticalHigh()
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}
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stackView.translatesAutoresizingMaskIntoConstraints = false
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stackView.axis = .horizontal
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stackView.alignment = .center
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stackView.isOpaque = false
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addSubview(stackView)
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addConstraints([
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undoButton.layoutMarginsGuide.leadingAnchor.constraint(equalTo: controlsLayoutGuide.leadingAnchor),
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stackView.topAnchor.constraint(equalTo: controlsLayoutGuide.topAnchor),
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stackView.bottomAnchor.constraint(equalTo: controlsLayoutGuide.bottomAnchor),
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stackView.trailingAnchor.constraint(equalTo: controlsLayoutGuide.trailingAnchor)
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])
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}
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@available(*, unavailable, message: "Use init(frame:)")
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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}
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protocol ImageEditorBottomBarButtonProvider: AnyObject {
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var middleButtons: [UIButton] { get }
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}
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protocol ImageEditorBottomBarProvider: AnyObject {
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func bottomBar(for viewController: UIViewController) -> ImageEditorBottomBar
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}
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class ImageEditorBottomBar: UIView {
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let cancelButton: UIButton = RoundMediaButton(
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image: UIImage(imageLiteralResourceName: "x-28"),
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backgroundStyle: .solid(RoundMediaButton.defaultBackgroundColor)
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)
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let doneButton: UIButton = RoundMediaButton(
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image: UIImage(imageLiteralResourceName: "check-28"),
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backgroundStyle: .solid(RoundMediaButton.defaultBackgroundColor)
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)
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let buttons: [UIButton]
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let stackView = UIStackView()
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private var areControlsHidden = false
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private var stackViewPositionConstraint: NSLayoutConstraint?
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init(buttonProvider: ImageEditorBottomBarButtonProvider?) {
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let middleButtons = buttonProvider?.middleButtons ?? []
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self.buttons = [ cancelButton ] + middleButtons + [ doneButton ]
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super.init(frame: .zero)
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preservesSuperviewLayoutMargins = true
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setContentHuggingVerticalHigh()
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// Constrain bottom edge to bottom safe area.
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if UIDevice.current.hasIPhoneXNotch {
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layoutMargins.bottom = 0
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}
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buttons.forEach { button in
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button.setContentHuggingHigh()
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button.setCompressionResistanceVerticalHigh()
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}
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let middleStackView = UIStackView(arrangedSubviews: middleButtons)
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middleStackView.spacing = 2
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stackView.addArrangedSubviews([ cancelButton, middleStackView, doneButton ])
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stackView.distribution = .equalSpacing
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stackView.isOpaque = false
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addSubview(stackView)
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stackView.autoPinLeadingToSuperviewMargin(withInset: -cancelButton.layoutMargins.leading)
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stackView.autoPinTrailingToSuperviewMargin(withInset: -doneButton.layoutMargins.trailing)
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stackView.heightAnchor.constraint(equalTo: layoutMarginsGuide.heightAnchor).isActive = true
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setControls(hidden: false)
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}
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@available(*, unavailable, message: "Use init(buttonProvider:)")
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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func setControls(hidden: Bool) {
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guard hidden != areControlsHidden || stackViewPositionConstraint == nil else { return }
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if let stackViewPositionConstraint = stackViewPositionConstraint {
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removeConstraint(stackViewPositionConstraint)
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self.stackViewPositionConstraint = nil
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}
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let stackViewPositionConstraint: NSLayoutConstraint
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if hidden {
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stackViewPositionConstraint = stackView.topAnchor.constraint(equalTo: bottomAnchor)
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} else {
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stackViewPositionConstraint = stackView.topAnchor.constraint(equalTo: layoutMarginsGuide.topAnchor)
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}
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addConstraint(stackViewPositionConstraint)
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self.stackViewPositionConstraint = stackViewPositionConstraint
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areControlsHidden = hidden
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}
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}
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