A text view that supports selection and expansion

import SelectableTextView

let textView = SelectableTextView()
textView.text = "Hello World!"
textView.truncationMode = .truncateTail
textView.alignment = .center
textView.numberOfLines = 1

let greetingValidator = MatchesTextValidator(text: "hello")
textView.registerValidator(_ validator: greetingValidator) { (validText, validator) in
	// Handle selection of "Hello"
}

let exclamationValidator = SuffixValidator(suffix: "!")
textView.registerValidator(_ validator: exclamationValidator) { (validText, validator) in
	// Handle selection of "World!"
}

let hashtagValidator = PrefixValidator(prefix: "#")
textView.registerValidator(validator: hashtagValidator) { (validText, validator) in
	// Handle selection of hashtag
}

textView.removeValidator(validator: hashtagValidator)

MatchesTextValidator(text: String, caseSensitive: Bool = false)

ContainsTextValidator(text: String, caseSensitive: Bool = false)

PrefixValidator(text: String, caseSensitive: Bool = false)

SuffixValidator(text: String, caseSensitive: Bool = false)

HashtagTextValidator()

AtSymbolTagTextValidator()

QuotationsTextValidator()

HandlebarsValidator(searchableText: String, replacementText: String)

ReverseValidator(validator: TextSelectionValidator)

ContainerValidator(validator: TextSelectionValidator, selectionAttributes: [String: Any]? = nil)

CompositeValidator(validators: [TextSelectionValidator], selectionAttributes: [String: Any]? = nil)

LinkValidator() // Validates any link (HTTP, HTTPS, file, etc...)

HTTPLinkValidator() // Validates HTTP and HTTPS links

UnsafeLinkValidator() // Validates HTTP links

HTTPSLinkValidator()

CustomLinkValidator(urlString: String!, replacementText: String? = nil) 

RegexValidator(pattern: String, options: NSRegularExpression.Options = .caseInsensitive)

EmailValidator()

PhoneNumberValidator()

public func addExpansionButton(collapsedState: (text: String, lines: Int), expandedState: (text: String, lines: Int), attributes: [String: Any]? = nil)

public func removeExpansionButton(numberOfLines: Int = 1)

let attributes = [NSForegroundColorAttributeName: purple]
textView.addExpansionButton(collapsedState: ("More...", 2),
                             expandedState: ("Less", 0),
                                attributes: attributes)
                                
...

textView.removeExpansionButton(numberOfLines: 2)

let attributes: [String: Any] = [HighlightedTextSelectionAttributes.SelectedBackgroundColorAttribute : UIColor.purple]

let text = "The period next to the #Hashtag\0. Will not be highlighted if I use a hashtag validator."

public func framesOfWordsMatchingValidator(_ validator: TextSelectionValidator) -> [CGRect]

TabTextModelConfig.numberOfSpaces = 2

public protocol SelectableTextViewDelegate: class {
    
    /// Resolves conflict between multiple validates that return `true` from their `validate:` method
    //
    // i.e. PrefixTextValidator for `#` and `#my` will both return true for `#myCoolHashtag`,
    // but the actions they are registered for may differ
    //
    /// Default behavior is to choose the first validator in the composite validator's `validators` array
    func resolveValidationConflictsForSelectableTextView(textView: SelectableTextView, conflictingValidators: [TextSelectionValidator]) -> TextSelectionValidator
    
    /// Defaults to `false`
    func animateExpansionButtonForSelectableTextView(textView: SelectableTextView) -> Bool
    
    /// Defaults to `.truncateTail`
    func truncationModeForWordsThatDontFitForSelectableTextView(textView: SelectableTextView) -> TruncationMode
    
    /// Optional, Default empty implementation provideed
    func selectableTextViewContentHeightDidChange(textView: SelectableTextView, oldHeight: CGFloat, newHeight: CGFloat)
}

public protocol SelectableTextViewScrollDelegate: class {
    
    func selectableTextViewDidScroll(_ scrollView: UIScrollView)
    func selectableTextViewWillBeginDragging(_ scrollView: UIScrollView)
    func selectableTextViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>)
    func selectableTextViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool)
    func selectableTextViewWillBeginDecelerating(_ scrollView: UIScrollView)
    func selectableTextViewDidEndDecelerating(_ scrollView: UIScrollView)
    func selectableTextViewDidEndScrollingAnimation(_ scrollView: UIScrollView)
}

/// Scrolls to the first instance of the word
/// Attempts to match the text and display text of a word
public func scrollToWord(_ word: String, position: ScrollPosition, animated: Bool)
    
   /// Scrolls to the first instance of a word that passes the provided TextSelectionValidator
public func scrollToWordPassingValidator(_ validator: TextSelectionValidator, position: ScrollPosition, animated: Bool)