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mention: allow mentioning users with punctuation characters in their names

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Finds the range of characters which represents a mention the user is
typing in PostView. Previously the tokenizer used the standard
granularity UITextGranularity.word, but this is insufficient for our use
case for detecting when a mention ends.

The criteria is simple: a mention starts with the '@' character and ends
when there is a space, line break, or @, instead of when there is a new
word.

Closes: https://github.com/damus-io/damus/issues/1721

Changelog-Fixed: Allow mentioning users with punctuation characters in their names
Lightning-url: LNURL1DP68GURN8GHJ7EM9W3SKCCNE9E3K7MF0D3H82UNVWQHKWUN9V4HXGCTHDC6RZVGR8SW3G
Signed-off-by: kernelkind <kernelkind@gmail.com>
Reviewed-by: William Casarin <jb55@jb55.com>
Signed-off-by: William Casarin <jb55@jb55.com>
This commit is contained in:
kernelkind
2024-01-20 10:44:13 -05:00
committed by William Casarin
parent 534969e616
commit 71b33fcd0b
1 changed files with 22 additions and 1 deletions
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23
damus/Views/TextViewWrapper.swift
View File

@@ -119,7 +119,7 @@ struct TextViewWrapper: UIViewRepresentable {
guard let selectedRange = textView.selectedTextRange else { return }
let wordRange = textView.tokenizer.rangeEnclosingPosition(selectedRange.start, with: .word, inDirection: .init(rawValue: UITextLayoutDirection.left.rawValue))
let wordRange = rangeOfMention(in: textView, from: selectedRange.start)
if let wordRange,
let startPosition = textView.position(from: wordRange.start, offset: -1),
@@ -131,6 +131,27 @@ struct TextViewWrapper: UIViewRepresentable {
getFocusWordForMention?(val.0, val.1)
}
func rangeOfMention(in textView: UITextView, from position: UITextPosition) -> UITextRange? {
var startPosition = position
while startPosition != textView.beginningOfDocument {
guard let previousPosition = textView.position(from: startPosition, offset: -1),
let range = textView.textRange(from: previousPosition, to: startPosition),
let text = textView.text(in: range), !text.isEmpty,
let lastChar = text.last else {
break
}
if [" ", "\n", "@"].contains(lastChar) {
break
}
startPosition = previousPosition
}
return startPosition == position ? nil : textView.textRange(from: startPosition, to: position)
}
private func convertToNSRange( _ startPosition: UITextPosition, _ endPosition: UITextPosition, _ textView: UITextView) -> NSRange? {
let startOffset = textView.offset(from: textView.beginningOfDocument, to: startPosition)