142 lines
4.1 KiB
Swift
142 lines
4.1 KiB
Swift
class RNUITextView: UIView {
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var textView: UITextView
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@objc var numberOfLines: Int = 0 {
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didSet {
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textView.textContainer.maximumNumberOfLines = numberOfLines
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}
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}
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@objc var selectable: Bool = true {
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didSet {
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textView.isSelectable = selectable
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}
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}
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@objc var ellipsizeMode: String = "tail" {
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didSet {
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textView.textContainer.lineBreakMode = self.getLineBreakMode()
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}
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}
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@objc var onTextLayout: RCTDirectEventBlock?
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override init(frame: CGRect) {
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if #available(iOS 16.0, *) {
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textView = UITextView(usingTextLayoutManager: false)
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} else {
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textView = UITextView()
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}
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// Disable scrolling
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textView.isScrollEnabled = false
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// Remove all the padding
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textView.textContainerInset = .zero
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textView.textContainer.lineFragmentPadding = 0
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// Remove other properties
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textView.isEditable = false
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textView.backgroundColor = .clear
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// Init
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super.init(frame: frame)
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self.clipsToBounds = true
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// Add the view
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addSubview(textView)
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let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(callOnPress(_:)))
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tapGestureRecognizer.isEnabled = true
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textView.addGestureRecognizer(tapGestureRecognizer)
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}
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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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// Resolves some animation issues
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override func reactSetFrame(_ frame: CGRect) {
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UIView.performWithoutAnimation {
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super.reactSetFrame(frame)
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}
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}
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func setText(string: NSAttributedString, size: CGSize, numberOfLines: Int) -> Void {
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self.textView.frame.size = size
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self.textView.textContainer.maximumNumberOfLines = numberOfLines
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self.textView.attributedText = string
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self.textView.selectedTextRange = nil
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if let onTextLayout = self.onTextLayout {
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var lines: [String] = []
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textView.layoutManager.enumerateLineFragments(
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forGlyphRange: NSRange(location: 0, length: textView.attributedText.length))
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{ (rect, usedRect, textContainer, glyphRange, stop) in
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let characterRange = self.textView.layoutManager.characterRange(forGlyphRange: glyphRange, actualGlyphRange: nil)
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let line = (self.textView.text as NSString).substring(with: characterRange)
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lines.append(line)
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}
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onTextLayout([
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"lines": lines
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])
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}
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}
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@IBAction func callOnPress(_ sender: UITapGestureRecognizer) -> Void {
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// If we find a child, then call onPress
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if let child = getPressed(sender) {
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if textView.selectedTextRange == nil, let onPress = child.onPress {
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onPress(["": ""])
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} else {
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// Clear the selected text range if we are not pressing on a link
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textView.selectedTextRange = nil
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}
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}
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}
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// Try to get the pressed segment
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func getPressed(_ sender: UITapGestureRecognizer) -> RNUITextViewChild? {
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let layoutManager = textView.layoutManager
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var location = sender.location(in: textView)
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// Remove the padding
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location.x -= textView.textContainerInset.left
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location.y -= textView.textContainerInset.top
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// Get the index of the char
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let charIndex = layoutManager.characterIndex(
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for: location,
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in: textView.textContainer,
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fractionOfDistanceBetweenInsertionPoints: nil
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)
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for child in self.reactSubviews() {
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if let child = child as? RNUITextViewChild, let childText = child.text {
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let fullText = self.textView.attributedText.string
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let range = fullText.range(of: childText)
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if let lowerBound = range?.lowerBound, let upperBound = range?.upperBound {
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if charIndex >= lowerBound.utf16Offset(in: fullText) && charIndex <= upperBound.utf16Offset(in: fullText) {
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return child
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}
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}
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}
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}
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return nil
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}
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func getLineBreakMode() -> NSLineBreakMode {
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switch self.ellipsizeMode {
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case "head":
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return .byTruncatingHead
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case "middle":
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return .byTruncatingMiddle
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case "tail":
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return .byTruncatingTail
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case "clip":
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return .byClipping
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default:
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return .byTruncatingTail
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}
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}
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}
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