Updated Label to account for situations where the text will have an image attachment. There is some bug that affects how the TextContainer looks at multiline text.

MVMCoreUI/Atoms/Views/Label.swift

@@ -26,6 +26,8 @@ public typealias ActionBlock = () -> Void
     public var sizeObject: MFSizeObject?
     public var scaleSize: NSNumber?
     
+    fileprivate var hasAttachmentImage = false
+    
     // Used for scaling the font in updateView.
     private var originalAttributedString: NSAttributedString?
     
@@ -223,6 +225,21 @@ public typealias ActionBlock = () -> Void
                         attributedString.removeAttribute(.foregroundColor, range: range)
                         attributedString.addAttribute(.foregroundColor, value: UIColor.mfGet(forHex: colorHex), range: range)
                     }
+                case "externalLink":
+                    let fontSize = (attribute["size"] as? CGFloat ?? label.font.pointSize) * 0.8
+                    
+                    let imageAttachment = NSTextAttachment()
+                    imageAttachment.image = MVMCoreUIUtility.imageNamed("externalLink")
+                    imageAttachment.bounds = CGRect(x: 0, y: 0, width: fontSize, height: fontSize)
+                    
+                    let mutableAttributedString = NSMutableAttributedString()
+                    mutableAttributedString.append(NSAttributedString(string: " "))
+                    mutableAttributedString.append(NSAttributedString(attachment: imageAttachment))
+                    
+                    attributedString.insert(mutableAttributedString, at: location)
+                    
+                    (label as? Label)?.hasAttachmentImage = true
+                    
                 case "font":
                     if let fontStyle = attribute.optionalStringForKey("style") {
                         let styles = MFStyler.styleGetAttributedString("0", withStyle: fontStyle)
@@ -342,13 +359,12 @@ public typealias ActionBlock = () -> Void
         }
     }
     
-    
     ///Appends an external link image to the end of the attributed string.
     public func addExternalLinkIcon() {
         
         let size = round(font.pointSize * 0.8)
         
-        guard let attributedText = self.attributedText else { return }
+        guard let attributedText = attributedText else { return }
         
         let fullString = NSMutableAttributedString(attributedString: attributedText)
         
@@ -359,6 +375,8 @@ public typealias ActionBlock = () -> Void
         fullString.append(NSAttributedString(string: " "))
         fullString.append(NSAttributedString(attachment: imageAttachment))
         self.attributedText = fullString
+        
+        hasAttachmentImage = true
     }
 }
 
@@ -369,6 +387,7 @@ extension Label {
         text = nil
         attributedText = nil
         originalAttributedString = nil
+        hasAttachmentImage = false
         styleB2(true)
     }
     
@@ -489,11 +508,25 @@ extension UITapGestureRecognizer {
             return true
         }
         
-        guard let attributedText = label.attributedText else { return false }
+        guard let attributedText = label.attributedText, let font = label.font else { return false }
+        
+        var fontToAnalyze: UIFont? = font
+        
+        // Necessary where label text is not consistent in font.
+        for attr in attributedText.attributes(at: targetRange.location, effectiveRange: nil) {
+            if attr.key == NSAttributedString.Key.font {
+                fontToAnalyze = attr.value as? UIFont
+            }
+        }
+        
+        let range = label.hasAttachmentImage ? NSRange(location: 0, length: attributedText.length) : targetRange
+        
+        let mutableAttribString = NSMutableAttributedString(attributedString: attributedText)
+        mutableAttribString.addAttributes([NSAttributedString.Key.font: fontToAnalyze as Any], range: range)
         
         let layoutManager = NSLayoutManager()
         let textContainer = NSTextContainer(size: .zero)
-        let textStorage = NSTextStorage(attributedString: attributedText)
+        let textStorage = NSTextStorage(attributedString: mutableAttribString)
         
         layoutManager.addTextContainer(textContainer)
         textStorage.addLayoutManager(layoutManager)
@@ -503,8 +536,8 @@ extension UITapGestureRecognizer {
         textContainer.maximumNumberOfLines = label.numberOfLines
         textContainer.size = label.bounds.size
         
-        let indexOfCharacter = layoutManager.characterIndex(for: location(in: label), in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
-     
-        return NSLocationInRange(indexOfCharacter, targetRange)
+        let indexOfGlyph = layoutManager.glyphIndex(for: location(in: label), in: textContainer)
+        
+        return NSLocationInRange(indexOfGlyph, targetRange)
     }
 }