76 lines
2.6 KiB
Swift
76 lines
2.6 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import UIKit
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// Requirements:
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// • Links should show up properly and be tappable
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// • Text should * not * be selectable (this is handled via the 'textViewDidChangeSelection(_:)'
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// delegate method)
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// • The long press interaction that shows the context menu should still work
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final class BodyTextView: UITextView {
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private let snDelegate: BodyTextViewDelegate?
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private let highlightedMentionBackgroundView: HighlightMentionBackgroundView = HighlightMentionBackgroundView()
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override var attributedText: NSAttributedString! {
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didSet {
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guard attributedText != nil else { return }
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highlightedMentionBackgroundView.maxPadding = highlightedMentionBackgroundView
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.calculateMaxPadding(for: attributedText)
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highlightedMentionBackgroundView.frame = self.bounds.insetBy(
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dx: -highlightedMentionBackgroundView.maxPadding,
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dy: -highlightedMentionBackgroundView.maxPadding
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)
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}
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}
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init(snDelegate: BodyTextViewDelegate?) {
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self.snDelegate = snDelegate
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super.init(frame: CGRect.zero, textContainer: nil)
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self.clipsToBounds = false // Needed for the 'HighlightMentionBackgroundView'
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addSubview(highlightedMentionBackgroundView)
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setUpGestureRecognizers()
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}
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override init(frame: CGRect, textContainer: NSTextContainer?) {
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preconditionFailure("Use init(snDelegate:) instead.")
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}
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required init?(coder: NSCoder) {
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preconditionFailure("Use init(snDelegate:) instead.")
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}
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private func setUpGestureRecognizers() {
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let longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress))
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addGestureRecognizer(longPressGestureRecognizer)
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let doubleTapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleDoubleTap))
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doubleTapGestureRecognizer.numberOfTapsRequired = 2
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addGestureRecognizer(doubleTapGestureRecognizer)
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}
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@objc private func handleLongPress() {
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snDelegate?.handleLongPress()
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}
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@objc private func handleDoubleTap() {
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// Do nothing
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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highlightedMentionBackgroundView.frame = self.bounds.insetBy(
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dx: -highlightedMentionBackgroundView.maxPadding,
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dy: -highlightedMentionBackgroundView.maxPadding
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)
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}
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}
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protocol BodyTextViewDelegate {
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func handleLongPress()
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}
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