345 lines
12 KiB
Swift
345 lines
12 KiB
Swift
//
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// Copyright (c) 2019 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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// Coincides with Android's max text message length
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let kMaxMessageBodyCharacterCount = 2000
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protocol AttachmentTextToolbarDelegate: class {
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func attachmentTextToolbarDidTapSend(_ attachmentTextToolbar: AttachmentTextToolbar)
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func attachmentTextToolbarDidBeginEditing(_ attachmentTextToolbar: AttachmentTextToolbar)
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func attachmentTextToolbarDidEndEditing(_ attachmentTextToolbar: AttachmentTextToolbar)
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func attachmentTextToolbarDidChange(_ attachmentTextToolbar: AttachmentTextToolbar)
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func attachmentTextToolbarDidViewOnce(_ attachmentTextToolbar: AttachmentTextToolbar)
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}
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// MARK: -
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class AttachmentTextToolbar: UIView, UITextViewDelegate {
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// MARK: - Dependencies
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private var preferences: OWSPreferences {
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return Environment.shared.preferences
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}
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// MARK: - Properties
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var options: AttachmentApprovalViewControllerOptions {
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didSet {
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updateContent()
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}
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}
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weak var attachmentTextToolbarDelegate: AttachmentTextToolbarDelegate?
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var isViewOnceEnabled: Bool {
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return (options.contains(.canToggleViewOnce) &&
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preferences.isViewOnceMessagesEnabled())
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}
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var messageText: String? {
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get {
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// Ignore message text if "view-once" is enabled.
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guard !isViewOnceEnabled else {
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return nil
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}
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return textView.text
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}
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set {
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textView.text = newValue
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updatePlaceholderTextViewVisibility()
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}
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}
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private let viewOnceWrapper = UIView()
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// Layout Constants
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let kMinToolbarItemHeight: CGFloat = 40
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let kMinTextViewHeight: CGFloat = 38
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var maxTextViewHeight: CGFloat {
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// About ~4 lines in portrait and ~3 lines in landscape.
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// Otherwise we risk obscuring too much of the content.
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return UIDevice.current.orientation.isPortrait ? 160 : 100
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}
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var textViewHeightConstraint: NSLayoutConstraint?
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let kToolbarMargin: CGFloat = 8
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// MARK: - Initializers
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init(options: AttachmentApprovalViewControllerOptions, sendButtonImageName: String) {
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self.options = options
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super.init(frame: CGRect.zero)
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// Specifying autorsizing mask and an intrinsic content size allows proper
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// sizing when used as an input accessory view.
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self.autoresizingMask = .flexibleHeight
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self.translatesAutoresizingMaskIntoConstraints = false
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self.backgroundColor = UIColor.clear
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textView.delegate = self
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let sendButton = OWSButton.sendButton(imageName: sendButtonImageName) { [weak self] in
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guard let self = self else { return }
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self.didTapSend()
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}
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sendButton.accessibilityLabel = NSLocalizedString("ATTACHMENT_APPROVAL_SEND_BUTTON", comment: "Label for 'send' button in the 'attachment approval' dialog.")
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viewOnceButton.block = { [weak self] in
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self?.didTapViewOnceMessagesButton()
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}
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// Vertically center and increase hit area of button, except on right side for symmetrical layout WRT the input text field
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viewOnceButton.contentEdgeInsets =
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UIEdgeInsets(top: 6,
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left: 8,
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bottom: (kMinToolbarItemHeight - timerHeight) / 2,
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right: 0)
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// Layout
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// We have to wrap the toolbar items in a content view because iOS (at least on iOS10.3) assigns the inputAccessoryView.layoutMargins
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// when resigning first responder (verified by auditing with `layoutMarginsDidChange`).
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// The effect of this is that if we were to assign these margins to self.layoutMargins, they'd be blown away if the
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// user dismisses the keyboard, giving the input accessory view a wonky layout.
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self.layoutMargins = UIEdgeInsets(top: kToolbarMargin, left: kToolbarMargin, bottom: kToolbarMargin, right: kToolbarMargin)
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let sendWrapper = UIView()
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sendWrapper.addSubview(sendButton)
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viewOnceWrapper.addSubview(viewOnceButton)
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let hStackView = UIStackView()
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hStackView.axis = .horizontal
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hStackView.alignment = .bottom
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hStackView.spacing = kToolbarMargin
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self.addSubview(hStackView)
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hStackView.autoPinEdgesToSuperviewMargins()
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var views = [ viewOnceWrapper, viewOnceSpacer, textContainer, sendWrapper ]
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// UIStackView's horizontal layout is leading-to-trailing.
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// We want left-to-right ordering, so reverse if RTL.
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if CurrentAppContext().isRTL {
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views.reverse()
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}
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for view in views {
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hStackView.addArrangedSubview(view)
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}
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textViewHeightConstraint = textView.autoSetDimension(.height, toSize: kMinTextViewHeight)
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viewOnceSpacer.autoSetDimension(.height, toSize: kMinTextViewHeight, relation: .greaterThanOrEqual)
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// We pin edges explicitly rather than doing something like:
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// textView.autoPinEdges(toSuperviewMarginsExcludingEdge: .right)
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// because that method uses `leading` / `trailing` rather than `left` vs. `right`.
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// So it doesn't work as expected with RTL layouts when we explicitly want something
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// to be on the right side for both RTL and LTR layouts, like with the send button.
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// I believe this is a bug in PureLayout. Filed here: https://github.com/PureLayout/PureLayout/issues/209
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textContainer.autoPinEdge(toSuperviewMargin: .top)
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textContainer.autoPinEdge(toSuperviewMargin: .bottom)
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let layoutButtonWithinWrapper = { (button: UIView) in
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button.autoPinEdgesToSuperviewEdges(with: .zero, excludingEdge: .top)
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button.autoPinEdge(toSuperviewEdge: .top, withInset: 0, relation: .greaterThanOrEqual)
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NSLayoutConstraint.autoSetPriority(.defaultLow) {
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button.autoPinEdge(toSuperviewEdge: .top)
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}
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button.setContentHuggingHigh()
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button.setCompressionResistanceHigh()
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}
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layoutButtonWithinWrapper(sendButton)
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layoutButtonWithinWrapper(viewOnceButton)
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updateContent()
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}
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required init?(coder aDecoder: NSCoder) {
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notImplemented()
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}
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// MARK: - UIView Overrides
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override var intrinsicContentSize: CGSize {
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get {
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// Since we have `self.autoresizingMask = UIViewAutoresizingFlexibleHeight`, we must specify
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// an intrinsicContentSize. Specifying CGSize.zero causes the height to be determined by autolayout.
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return CGSize.zero
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}
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}
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// MARK: - Subviews
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let timerHeight: CGFloat = 24
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private func updateContent() {
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AssertIsOnMainThread()
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let isViewOnceMessagesEnabled = preferences.isViewOnceMessagesEnabled()
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let imageName = isViewOnceMessagesEnabled ? "timer-24" : "timer-disabled-24"
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viewOnceButton.setTemplateImageName(imageName, tintColor: Theme.darkThemePrimaryColor)
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viewOnceSpacer.isHidden = !isViewOnceEnabled
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textContainer.isHidden = isViewOnceEnabled
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viewOnceWrapper.isHidden = !options.contains(.canToggleViewOnce)
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updateHeight(textView: textView)
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}
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lazy var textView: UITextView = {
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let textView = buildTextView()
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textView.returnKeyType = .done
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textView.scrollIndicatorInsets = UIEdgeInsets(top: 5, left: 0, bottom: 5, right: 3)
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return textView
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}()
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private lazy var placeholderTextView: UITextView = {
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let placeholderTextView = buildTextView()
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placeholderTextView.text = NSLocalizedString("MESSAGE_TEXT_FIELD_PLACEHOLDER", comment: "placeholder text for the editable message field")
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placeholderTextView.isEditable = false
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return placeholderTextView
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}()
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private lazy var textContainer: UIView = {
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let textContainer = UIView()
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let textBorder = UIView()
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textContainer.addSubview(textBorder)
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let inset = (kMinToolbarItemHeight - kMinTextViewHeight) / 2
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textBorder.autoPinEdgesToSuperviewEdges(with: UIEdgeInsets(top: 0, leading: 0, bottom: inset, trailing: 0))
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textBorder.layer.borderColor = Theme.darkThemePrimaryColor.cgColor
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textBorder.layer.borderWidth = CGHairlineWidthFraction(1.4)
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textBorder.layer.cornerRadius = kMinTextViewHeight / 2
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textBorder.clipsToBounds = true
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textBorder.addSubview(placeholderTextView)
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placeholderTextView.autoPinEdgesToSuperviewEdges()
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textBorder.addSubview(textView)
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textView.autoPinEdgesToSuperviewEdges()
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return textContainer
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}()
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private func buildTextView() -> UITextView {
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let textView = AttachmentTextView()
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textView.keyboardAppearance = Theme.darkThemeKeyboardAppearance
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textView.backgroundColor = .clear
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textView.tintColor = Theme.darkThemePrimaryColor
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textView.font = UIFont.ows_dynamicTypeBody
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textView.textColor = Theme.darkThemePrimaryColor
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textView.textContainerInset = UIEdgeInsets(top: 7, left: 7, bottom: 7, right: 7)
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return textView
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}
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private let viewOnceButton = OWSButton()
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private let viewOnceSpacer = UIView.hStretchingSpacer()
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// MARK: - Actions
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@objc
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func didTapSend() {
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assert(attachmentTextToolbarDelegate != nil)
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textView.acceptAutocorrectSuggestion()
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attachmentTextToolbarDelegate?.attachmentTextToolbarDidTapSend(self)
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}
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@objc
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func didTapViewOnceMessagesButton() {
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AssertIsOnMainThread()
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// Toggle value.
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let isViewOnceMessagesEnabled = !preferences.isViewOnceMessagesEnabled()
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preferences.setIsViewOnceMessagesEnabled(isViewOnceMessagesEnabled)
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attachmentTextToolbarDelegate?.attachmentTextToolbarDidViewOnce(self)
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updateContent()
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}
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// MARK: - UITextViewDelegate
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public func textViewDidChange(_ textView: UITextView) {
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updateHeight(textView: textView)
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attachmentTextToolbarDelegate?.attachmentTextToolbarDidChange(self)
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}
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public func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
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// Though we can wrap the text, we don't want to encourage multline captions, plus a "done" button
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// allows the user to get the keyboard out of the way while in the attachment approval view.
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if text == "\n" {
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textView.resignFirstResponder()
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return false
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} else {
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return true
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}
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}
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public func textViewDidBeginEditing(_ textView: UITextView) {
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attachmentTextToolbarDelegate?.attachmentTextToolbarDidBeginEditing(self)
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updatePlaceholderTextViewVisibility()
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}
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public func textViewDidEndEditing(_ textView: UITextView) {
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attachmentTextToolbarDelegate?.attachmentTextToolbarDidEndEditing(self)
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updatePlaceholderTextViewVisibility()
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}
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// MARK: - Helpers
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func updatePlaceholderTextViewVisibility() {
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let isHidden: Bool = {
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guard !self.textView.isFirstResponder else {
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return true
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}
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guard let text = self.textView.text else {
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return false
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}
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guard text.count > 0 else {
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return false
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}
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return true
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}()
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placeholderTextView.isHidden = isHidden
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}
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private func updateHeight(textView: UITextView) {
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guard let textViewHeightConstraint = textViewHeightConstraint else {
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owsFailDebug("Missing constraint.")
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return
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}
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// compute new height assuming width is unchanged
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let currentSize = textView.frame.size
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let textViewHeight = clampedTextViewHeight(fixedWidth: currentSize.width)
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if textViewHeightConstraint.constant != textViewHeight {
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Logger.debug("TextView height changed: \(textViewHeightConstraint.constant) -> \(textViewHeight)")
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textViewHeightConstraint.constant = textViewHeight
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invalidateIntrinsicContentSize()
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}
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textViewHeightConstraint.isActive = !isViewOnceEnabled
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}
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private func clampedTextViewHeight(fixedWidth: CGFloat) -> CGFloat {
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let contentSize = textView.sizeThatFits(CGSize(width: fixedWidth, height: CGFloat.greatestFiniteMagnitude))
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return CGFloatClamp(contentSize.height, kMinTextViewHeight, maxTextViewHeight)
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}
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}
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