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Merge branch 'bugfix/label-action' into mbruce/bugfix

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This commit is contained in:
Matt Bruce 2024-06-21 14:26:26 -05:00
commit 5d21e500bc
2 changed files with 77 additions and 53 deletions
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110
VDS/Components/Label/Label.swift
View File

@ -389,60 +389,100 @@ open class Label: UILabel, ViewProtocol, UserInfoable {
}
}
//--------------------------------------------------
// MARK: - Touch Events
//--------------------------------------------------
@objc private func textLinkTapped(_ gesture: UITapGestureRecognizer) {
for actionable in actions {
// This determines if we tapped on the desired range of text.
let location = gesture.location(in: self)
if didTapActionInLabel(location, inRange: actionable.range) {
actionable.performAction()
return
}
let location = gesture.location(in: self)
if let action = actions.first(where: { isAction(for: location, inRange: $0.range) }) {
action.performAction()
}
}
public func isAction(for location: CGPoint) -> Bool {
for actionable in actions {
if didTapActionInLabel(location, inRange: actionable.range) {
return true
}
}
return false
actions.contains(where: {isAction(for: location, inRange: $0.range)})
}
private func didTapActionInLabel(_ location: CGPoint, inRange targetRange: NSRange) -> Bool {
public func isAction(for location: CGPoint, inRange targetRange: NSRange) -> Bool {
guard let abstractContainer = abstractTextContainer() else { return false }
let textContainer = abstractContainer.textContainer
let layoutManager = abstractContainer.layoutManager
guard let attributedText else { return false }
let indexOfGlyph = layoutManager.glyphIndex(for: location, in: textContainer)
let intrinsicWidth = intrinsicContentSize.width
// Assert that tapped occured within acceptable bounds based on alignment.
switch textAlignment {
case .right:
if location.x < bounds.width - intrinsicWidth {
return false
}
case .center:
let halfBounds = bounds.width / 2
let halfIntrinsicWidth = intrinsicWidth / 2
if location.x > halfBounds + halfIntrinsicWidth {
return false
} else if location.x < halfBounds - halfIntrinsicWidth {
return false
}
default: // Left align
if location.x > intrinsicWidth {
return false
}
}
// Affirms that the tap occured in the desired rect of provided by the target range.
return layoutManager.boundingRect(forGlyphRange: targetRange, in: textContainer).contains(location)
&& NSLocationInRange(indexOfGlyph, targetRange)
}
/**
Provides a text container and layout manager of how the text would appear on screen.
They are used in tandem to derive low-level TextKit results of the label.
*/
public func abstractTextContainer() -> (textContainer: NSTextContainer, layoutManager: NSLayoutManager, textStorage: NSTextStorage)? {
// Must configure the attributed string to translate what would appear on screen to accurately analyze.
guard let attributedText = attributedText else { return nil }
let paragraph = NSMutableParagraphStyle()
paragraph.alignment = textAlignment
let stagedAttributedString = NSMutableAttributedString(attributedString: attributedText)
stagedAttributedString.addAttributes([NSAttributedString.Key.paragraphStyle: paragraph], range: NSRange(location: 0, length: attributedText.string.count))
let textStorage = NSTextStorage(attributedString: stagedAttributedString)
let layoutManager = NSLayoutManager()
let textContainer = NSTextContainer(size: bounds.size)
let textStorage = NSTextStorage(attributedString: attributedText)
let textContainer = NSTextContainer(size: .zero)
layoutManager.addTextContainer(textContainer)
textStorage.addLayoutManager(layoutManager)
let characterIndex = layoutManager.characterIndex(for: location, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
guard let _ = attributedText.attribute(NSAttributedString.Key.action, at: characterIndex, effectiveRange: nil) as? String, characterIndex < attributedText.length else { return false }
return true
textContainer.lineFragmentPadding = 0.0
textContainer.lineBreakMode = lineBreakMode
textContainer.maximumNumberOfLines = numberOfLines
textContainer.size = bounds.size
return (textContainer, layoutManager, textStorage)
}
//--------------------------------------------------
// MARK: - Accessibility
//--------------------------------------------------
private func customAccessibilityElement(text: String?, range: NSRange, accessibleText: String? = nil) -> AccessibilityActionElement? {
guard let text = text, let attributedText else { return nil }
guard let text = text, let abstractContainer = abstractTextContainer() else { return nil }
let textContainer = abstractContainer.textContainer
let layoutManager = abstractContainer.layoutManager
let actionText = accessibleText ?? (text.isValid(range: range) ? NSString(string:text).substring(with: range) : text)
// Calculate the frame of the substring
let layoutManager = NSLayoutManager()
let textContainer = NSTextContainer(size: bounds.size)
let textStorage = NSTextStorage(attributedString: attributedText)
layoutManager.addTextContainer(textContainer)
textStorage.addLayoutManager(layoutManager)
var glyphRange = NSRange()
// Convert the range for the substring into a range of glyphs
layoutManager.characterRange(forGlyphRange: range, actualGlyphRange: &glyphRange)
let substringBounds = layoutManager.boundingRect(forGlyphRange: glyphRange, in: textContainer)
// Create custom accessibility element
@ -456,10 +496,6 @@ open class Label: UILabel, ViewProtocol, UserInfoable {
return element
}
//--------------------------------------------------
// MARK: - Accessibility
//--------------------------------------------------
open var accessibilityAction: ((Label) -> Void)?
private var _isAccessibilityElement: Bool = false

20
VDS/Extensions/UITapGestureRecognizer.swift
View File

@ -12,23 +12,11 @@ extension UITapGestureRecognizer {
/// Determines if the touch event has a action attribute within the range given
/// - Parameters:
/// - label: UILabel in question
/// - label: Label in question
/// - targetRange: Range to look within
/// - Returns: Wether the range in the label has an action
public func didTapActionInLabel(_ label: UILabel, inRange targetRange: NSRange) -> Bool {
guard let attributedText = label.attributedText else { return false }
let layoutManager = NSLayoutManager()
let textContainer = NSTextContainer(size: label.bounds.size)
let textStorage = NSTextStorage(attributedString: attributedText)
layoutManager.addTextContainer(textContainer)
textStorage.addLayoutManager(layoutManager)
let location = location(in: label)
let characterIndex = layoutManager.characterIndex(for: location, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
guard let _ = attributedText.attribute(NSAttributedString.Key.action, at: characterIndex, effectiveRange: nil) as? String, characterIndex < attributedText.length else { return false }
return true
public func didTapActionInLabel(_ label: Label, inRange targetRange: NSRange) -> Bool {
let tapLocation = location(in: label)
return label.isAction(for: tapLocation, inRange: targetRange)
}
}