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refactoring taxtcontainer.

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This commit is contained in:
Kevin G Christiano 2019-10-17 12:17:14 -04:00
parent 96e5f47dd0
commit b5dcf68c5d
1 changed files with 17 additions and 27 deletions
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44
MVMCoreUI/Atoms/Views/Label.swift
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@ -505,10 +505,12 @@ public typealias ActionBlock = () -> ()
let accessibleAction = customAccessibilityAction(range: range) let accessibleAction = customAccessibilityAction(range: range)
clauses.append(ActionableClause(range: range, actionBlock: actionBlock, accessibilityID: accessibleAction?.hash ?? -1)) clauses.append(ActionableClause(range: range, actionBlock: actionBlock, accessibilityID: accessibleAction?.hash ?? -1))
} }
public static func boundingRect(forCharacterRange range: NSRange, in label: Label) -> CGRect { /// Provides a text container in memory of how the text would appear on screen.
func abstractTextContainer() -> NSTextContainer? {
guard let attributedText = label.attributedText else { return CGRect() }
// 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() let paragraph = NSMutableParagraphStyle()
paragraph.alignment = label.textAlignment paragraph.alignment = label.textAlignment
@ -524,9 +526,16 @@ public typealias ActionBlock = () -> ()
textStorage.addLayoutManager(layoutManager) textStorage.addLayoutManager(layoutManager)
textContainer.lineFragmentPadding = 0.0 textContainer.lineFragmentPadding = 0.0
textContainer.lineBreakMode = label.lineBreakMode textContainer.lineBreakMode = lineBreakMode
textContainer.maximumNumberOfLines = label.numberOfLines textContainer.maximumNumberOfLines = numberOfLines
textContainer.size = label.bounds.size textContainer.size = bounds.size
return textContainer
}
public static func boundingRect(forCharacterRange range: NSRange, in label: Label) -> CGRect {
let textContainer = abstractTextContainer()
var glyphRange = NSRange() var glyphRange = NSRange()
@ -669,26 +678,7 @@ extension UITapGestureRecognizer {
return true return true
} }
// Must configure the attributed string to translate what would appear on screen to accurately analyze. guard let textContainer = label.abstractTextContainer() else { return false }
guard let attributedText = label.attributedText else { return false }
let paragraph = NSMutableParagraphStyle()
paragraph.alignment = label.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: .zero)
layoutManager.addTextContainer(textContainer)
textStorage.addLayoutManager(layoutManager)
textContainer.lineFragmentPadding = 0.0
textContainer.lineBreakMode = label.lineBreakMode
textContainer.maximumNumberOfLines = label.numberOfLines
textContainer.size = label.bounds.size
let indexOfGlyph = layoutManager.glyphIndex(for: location(in: label), in: textContainer) let indexOfGlyph = layoutManager.glyphIndex(for: location(in: label), in: textContainer)