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Code Issues Releases Wiki Activity

Fix insertion-point bug in body editor

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This commit is contained in:
Angelo Stavrow 2020-10-28 10:36:08 -04:00
parent 3becfcbf73
commit 61cc9464c0
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GPG Key ID: 1A49C7064E060EEE
3 changed files with 56 additions and 31 deletions
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63
iOS/PostEditor/PostBodyTextView.swift
View File

@ -1,26 +1,44 @@
// Based on https://stackoverflow.com/a/56508132/1234545
// Based on https://stackoverflow.com/a/56508132/1234545 and https://stackoverflow.com/a/48360549/1234545
import SwiftUI
struct PostBodyTextView: UIViewRepresentable {
class Coordinator: NSObject, UITextViewDelegate {
class PostBodyCoordinator: NSObject, UITextViewDelegate, NSLayoutManagerDelegate {
@Binding var text: String
@Binding var isFirstResponder: Bool
var lineSpacingMultiplier: CGFloat
var didBecomeFirstResponder: Bool = false
var postBodyTextView: PostBodyTextView
init(text: Binding<String>, isFirstResponder: Binding<Bool>) {
weak var textView: UITextView?
init(
_ textView: PostBodyTextView,
text: Binding<String>,
isFirstResponder: Binding<Bool>,
lineSpacingMultiplier: CGFloat
) {
self.postBodyTextView = textView
_text = text
_isFirstResponder = isFirstResponder
self.lineSpacingMultiplier = lineSpacingMultiplier
}
func textViewDidChangeSelection(_ textView: UITextView) {
func textViewDidChange(_ textView: UITextView) {
DispatchQueue.main.async {
self.text = textView.text ?? ""
}
self.postBodyTextView.text = textView.text ?? ""
}
}
func layoutManager(
_ layoutManager: NSLayoutManager,
lineSpacingAfterGlyphAt glyphIndex: Int,
withProposedLineFragmentRect rect: CGRect
) -> CGFloat {
return 17 * lineSpacingMultiplier
}
}
struct PostBodyTextView: UIViewRepresentable {
@Binding var text: String
@Binding var textStyle: UIFont
@Binding var isFirstResponder: Bool
@ -28,29 +46,36 @@ struct PostBodyTextView: UIViewRepresentable {
func makeUIView(context: UIViewRepresentableContext<PostBodyTextView>) -> UITextView {
let textView = UITextView(frame: .zero)
textView.isEditable = true
textView.isUserInteractionEnabled = true
textView.isScrollEnabled = true
textView.alwaysBounceVertical = false
context.coordinator.textView = textView
textView.delegate = context.coordinator
textView.layoutManager.delegate = context.coordinator
let font = textStyle
let fontMetrics = UIFontMetrics(forTextStyle: .largeTitle)
textView.font = fontMetrics.scaledFont(for: font)
textView.backgroundColor = UIColor.clear
return textView
}
func makeCoordinator() -> PostBodyTextView.Coordinator {
return Coordinator(text: $text, isFirstResponder: $isFirstResponder)
func makeCoordinator() -> PostBodyCoordinator {
return Coordinator(
self,
text: $text,
isFirstResponder: $isFirstResponder,
lineSpacingMultiplier: lineSpacing
)
}
func updateUIView(_ uiView: UITextView, context: UIViewRepresentableContext<PostBodyTextView>) {
let attributedString = NSMutableAttributedString(string: text)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = lineSpacing
attributedString.addAttribute(
NSAttributedString.Key.paragraphStyle,
value: paragraphStyle,
range: NSMakeRange(0, attributedString.length) // swiftlint:disable:this legacy_constructor
)
uiView.text = text
uiView.attributedText = attributedString
let font = textStyle
let fontMetrics = UIFontMetrics(forTextStyle: .largeTitle)
uiView.font = fontMetrics.scaledFont(for: font)

6
iOS/PostEditor/PostTextEditingView.swift
View File

@ -70,9 +70,9 @@ struct PostTextEditingView: View {
text: $post.body,
textStyle: $bodyTextStyle,
isFirstResponder: $bodyIsFirstResponder,
lineSpacing: 17 * (
horizontalSizeClass == .compact ? bodyLineSpacingMultiplier / 2 : bodyLineSpacingMultiplier
)
lineSpacing: horizontalSizeClass == .compact
? bodyLineSpacingMultiplier / 2
: bodyLineSpacingMultiplier
)
.onChange(of: post.body) { _ in
if post.status == PostStatus.published.rawValue && !updatingBodyFromServer {

6
iOS/PostEditor/PostTitleTextView.swift
View File

@ -3,7 +3,7 @@
import SwiftUI
class Coordinator: NSObject, UITextViewDelegate, NSLayoutManagerDelegate {
class PostTitleCoordinator: NSObject, UITextViewDelegate, NSLayoutManagerDelegate {
@Binding var text: String
@Binding var isFirstResponder: Bool
var didBecomeFirstResponder: Bool = false
@ -17,7 +17,7 @@ class Coordinator: NSObject, UITextViewDelegate, NSLayoutManagerDelegate {
_isFirstResponder = isFirstResponder
}
func textViewDidChangeSelection(_ textView: UITextView) {
func textViewDidChange(_ textView: UITextView) {
DispatchQueue.main.async {
self.postTitleTextView.text = textView.text ?? ""
}
@ -75,7 +75,7 @@ struct PostTitleTextView: UIViewRepresentable {
return textView
}
func makeCoordinator() -> Coordinator {
func makeCoordinator() -> PostTitleCoordinator {
return Coordinator(self, text: $text, isFirstResponder: $isFirstResponder)
}