forked from shadowfacts/Tusker
More StatusContentLabel cleanup
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parent
078e73b161
commit
6af5bae335
GPG Key ID:
94A5AB95422746E5
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@ -35,14 +35,13 @@ class StatusContentLabel: UILabel {
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}
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}
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public var lineSpacing: CGFloat = 0
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public var minimumLineHeight: CGFloat = 0
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private var _customizing = true
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private lazy var textStorage = NSTextStorage()
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private lazy var layoutManager = NSLayoutManager()
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private lazy var textContainer = NSTextContainer()
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private var selectedElement: (range: NSRange, url: URL)?
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private var selectedLink: (range: NSRange, url: URL)?
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private var links: [NSRange: URL] = [:]
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@ -58,11 +57,27 @@ class StatusContentLabel: UILabel {
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setupLabel()
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}
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private func setupLabel() {
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textStorage.addLayoutManager(layoutManager)
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layoutManager.addTextContainer(textContainer)
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textContainer.lineFragmentPadding = 0
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textContainer.lineBreakMode = lineBreakMode
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textContainer.maximumNumberOfLines = numberOfLines
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isUserInteractionEnabled = true
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}
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override func awakeFromNib() {
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super.awakeFromNib()
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updateTextStorage()
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}
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override var intrinsicContentSize: CGSize {
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let superSize = super.intrinsicContentSize
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textContainer.size = CGSize(width: superSize.width, height: .greatestFiniteMagnitude)
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let size = layoutManager.usedRect(for: textContainer)
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return CGSize(width: ceil(size.width), height: ceil(size.height))
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}
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override func drawText(in rect: CGRect) {
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let range = NSRange(location: 0, length: textStorage.length)
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@ -73,113 +88,7 @@ class StatusContentLabel: UILabel {
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layoutManager.drawGlyphs(forGlyphRange: range, at: origin)
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}
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override var intrinsicContentSize: CGSize {
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let superSize = super.intrinsicContentSize
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textContainer.size = CGSize(width: superSize.width, height: .greatestFiniteMagnitude)
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let size = layoutManager.usedRect(for: textContainer)
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return CGSize(width: ceil(size.width), height: ceil(size.height))
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}
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private func element(at location: CGPoint) -> (range: NSRange, url: URL)? {
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guard textStorage.length > 0 else { return nil }
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let boundingRect = layoutManager.boundingRect(forGlyphRange: NSRange(location: 0, length: textStorage.length), in: textContainer)
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guard boundingRect.contains(location) else {
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return nil
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}
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let index = layoutManager.glyphIndex(for: location, in: textContainer)
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for (range, url) in links {
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if index >= range.location && index <= range.location + range.length {
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return (range, url)
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}
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}
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return nil
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}
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private func updateAttributesWhenSelected(_ isSelected: Bool) {
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guard let selectedElement = selectedElement else { return }
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var attributes = textStorage.attributes(at: 0, effectiveRange: nil)
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attributes[.foregroundColor] = isSelected ? nil : UIColor.blue
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textStorage.addAttributes(attributes, range: selectedElement.range)
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setNeedsDisplay()
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}
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private func onTouch(_ touch: UITouch) -> Bool {
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let location = touch.location(in: self)
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var avoidSuperCall = false
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switch touch.phase {
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case .began, .moved:
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if let element = element(at: location) {
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if element.range.location != selectedElement?.range.location || element.range.length != selectedElement?.range.length {
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updateAttributesWhenSelected(false)
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selectedElement = element
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updateAttributesWhenSelected(true)
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}
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avoidSuperCall = true
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} else {
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updateAttributesWhenSelected(false)
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selectedElement = nil
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}
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case .ended:
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guard let selectedElement = selectedElement else { return avoidSuperCall }
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print("tapped \(selectedElement)")
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let when = DispatchTime.now() + Double(Int64(0.25 * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC)
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DispatchQueue.main.asyncAfter(deadline: when) {
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self.updateAttributesWhenSelected(false)
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self.selectedElement = nil
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}
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case .cancelled:
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updateAttributesWhenSelected(false)
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selectedElement = nil
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case .stationary:
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break
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}
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return avoidSuperCall
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}
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override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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if onTouch(touch) { return }
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super.touchesBegan(touches, with: event)
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}
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override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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if onTouch(touch) { return }
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super.touchesMoved(touches, with: event)
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}
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override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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if onTouch(touch) { return }
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super.touchesCancelled(touches, with: event)
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}
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override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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if onTouch(touch) { return }
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super.touchesEnded(touches, with: event)
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}
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private func setupLabel() {
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textStorage.addLayoutManager(layoutManager)
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layoutManager.addTextContainer(textContainer)
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textContainer.lineFragmentPadding = 0
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textContainer.lineBreakMode = lineBreakMode
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textContainer.maximumNumberOfLines = numberOfLines
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isUserInteractionEnabled = true
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}
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// MARK: - HTML parsing
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private func parseHTML() {
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if _customizing { return }
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@ -235,8 +144,10 @@ class StatusContentLabel: UILabel {
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}
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}
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// MARK: - Text Storage
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private func updateTextStorage() {
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guard !_customizing else { return }
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if _customizing { return }
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guard let attributedText = attributedText,
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attributedText.length > 0 else {
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links = [:]
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@ -252,21 +163,98 @@ class StatusContentLabel: UILabel {
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setNeedsDisplay()
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}
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private func addLineBreak(_ attrString: NSAttributedString) -> NSMutableAttributedString {
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let mutAttrString = NSMutableAttributedString(attributedString: attrString)
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// MARK: - Interaction
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var range = NSRange(location: 0, length: 0)
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var attributes = mutAttrString.attributes(at: 0, effectiveRange: &range)
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private func onTouch(_ touch: UITouch) -> Bool {
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let location = touch.location(in: self)
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var avoidSuperCall = false
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let paragraphStyle = attributes[.paragraphStyle] as? NSMutableParagraphStyle ?? NSMutableParagraphStyle()
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paragraphStyle.lineBreakMode = .byWordWrapping
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paragraphStyle.alignment = textAlignment
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paragraphStyle.lineSpacing = lineSpacing
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paragraphStyle.minimumLineHeight = minimumLineHeight > 0 ? minimumLineHeight : self.font.pointSize * 1.14
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attributes[.paragraphStyle] = paragraphStyle
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mutAttrString.setAttributes(attributes, range: range)
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switch touch.phase {
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case .began, .moved:
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if let link = link(at: location) {
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if link.range.location != selectedLink?.range.location || link.range.length != selectedLink?.range.length {
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updateAttributesWhenSelected(false)
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selectedLink = link
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updateAttributesWhenSelected(true)
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}
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avoidSuperCall = true
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} else {
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updateAttributesWhenSelected(false)
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selectedLink = nil
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}
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case .ended:
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guard let selectedLink = selectedLink else { return avoidSuperCall }
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return mutAttrString
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print("tapped \(selectedLink)")
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let when = DispatchTime.now() + Double(Int64(0.25 * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC)
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DispatchQueue.main.asyncAfter(deadline: when) {
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self.updateAttributesWhenSelected(false)
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self.selectedLink = nil
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}
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case .cancelled:
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updateAttributesWhenSelected(false)
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selectedLink = nil
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case .stationary:
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break
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}
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return avoidSuperCall
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}
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override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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if onTouch(touch) { return }
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super.touchesBegan(touches, with: event)
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}
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override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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if onTouch(touch) { return }
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super.touchesMoved(touches, with: event)
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}
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override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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if onTouch(touch) { return }
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super.touchesCancelled(touches, with: event)
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}
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override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
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guard let touch = touches.first else { return }
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if onTouch(touch) { return }
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super.touchesEnded(touches, with: event)
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}
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private func link(at location: CGPoint) -> (range: NSRange, url: URL)? {
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guard textStorage.length > 0 else { return nil }
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let boundingRect = layoutManager.boundingRect(forGlyphRange: NSRange(location: 0, length: textStorage.length), in: textContainer)
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guard boundingRect.contains(location) else {
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return nil
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}
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let index = layoutManager.glyphIndex(for: location, in: textContainer)
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for (range, url) in links {
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if index >= range.location && index <= range.location + range.length {
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return (range, url)
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}
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}
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return nil
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}
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private func updateAttributesWhenSelected(_ isSelected: Bool) {
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guard let selectedLink = selectedLink else { return }
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var attributes = textStorage.attributes(at: 0, effectiveRange: nil)
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attributes[.foregroundColor] = isSelected ? nil : UIColor.blue
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textStorage.addAttributes(attributes, range: selectedLink.range)
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setNeedsDisplay()
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}
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}
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@ -50,93 +50,8 @@ class StatusTableViewCell: UITableViewCell {
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}
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contentLabel.text = status.content
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// let doc = try! SwiftSoup.parse(status.content)
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// let body = doc.body()!
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//// print("---")
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//// print(status.content)
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//// print("---")
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//
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// let (text, links) = attributedTextForNode(body)
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// self.links = links
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// contentLabel.attributedText = text
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// contentLabel.isUserInteractionEnabled = true
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// contentLabel.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleTapOnContentLabel(_:))))
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//
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// // https://stackoverflow.com/a/28519273/4731558
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// layoutManager = NSLayoutManager()
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// textContainer = NSTextContainer(size: .zero)
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// textStorage = NSTextStorage(attributedString: text)
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//
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// layoutManager.addTextContainer(textContainer)
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// textStorage.addLayoutManager(layoutManager)
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//
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// textContainer.lineFragmentPadding = 0
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// textContainer.lineBreakMode = contentLabel.lineBreakMode
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// textContainer.maximumNumberOfLines = contentLabel.numberOfLines
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}
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// func attributedTextForNode(_ node: Node) -> (NSAttributedString, [NSRange: URL]) {
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// switch node {
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// case let node as TextNode:
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// return (NSAttributedString(string: node.text()), [:])
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// case let node as Element:
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// var links = [NSRange: URL]()
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// let attributed = NSMutableAttributedString()
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// node.getChildNodes().forEach { child in
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// let (text, childLinks) = attributedTextForNode(child)
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// childLinks.forEach { range, url in
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// let newRange = NSRange(location: range.location + attributed.length, length: range.length)
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// links[newRange] = url
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// }
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// attributed.append(text)
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// }
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//
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// switch node.tagName() {
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// case "br":
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// attributed.append(NSAttributedString(string: "\n"))
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// case "a":
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// if let link = try? node.attr("href"),
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// let url = URL(string: link) {
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// let linkRange = NSRange(location: 0, length: attributed.length)
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// let linkAttributes: [NSAttributedString.Key: Any] = [
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// .foregroundColor: UIColor.blue
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// ]
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// attributed.setAttributes(linkAttributes, range: linkRange)
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//
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// links[linkRange] = url
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// }
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// default:
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// break
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// }
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//
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// return (attributed, links)
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// default:
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// fatalError("Unexpected node type: \(type(of: node))")
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// }
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// }
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// @objc func handleTapOnContentLabel(_ tapGesture: UITapGestureRecognizer) {
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// guard let view = tapGesture.view else { fatalError() }
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//
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// let locationOfTouchInLabel = tapGesture.location(in: view)
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// let labelSize = view.bounds.size
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// let textBoundingBox = layoutManager.usedRect(for: textContainer)
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// let textContainerOffset = CGPoint(x: (labelSize.width - textBoundingBox.size.width) * 0.5 - textBoundingBox.origin.x,
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// y: (labelSize.height - textBoundingBox.size.height) * 0.5 - textBoundingBox.origin.y)
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// let locationOfTouchInTextContainer = CGPoint(x: locationOfTouchInLabel.x - textContainerOffset.x,
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// y: locationOfTouchInLabel.y - textContainerOffset.y)
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// let indexOfCharacter = layoutManager.characterIndex(for: locationOfTouchInTextContainer, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
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//
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// let link = links.first { (range, _) -> Bool in
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// range.contains(indexOfCharacter)
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// }
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//
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// if let (_, url) = link {
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// print("Open URL: \(url)")
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// }
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// }
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override func prepareForReuse() {
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if let url = avatarURL {
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AvatarCache.shared.cancel(url)
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