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282
submodules/Display/Source/Nodes/ButtonNode.swift
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282
submodules/Display/Source/Nodes/ButtonNode.swift
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import Foundation
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import UIKit
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import AsyncDisplayKit
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open class ASButtonNode: ASControlNode {
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public let titleNode: ImmediateTextNode
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public let highlightedTitleNode: ImmediateTextNode
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public let imageNode: ASImageNode
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public let backgroundImageNode: ASImageNode
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public let highlightedBackgroundImageNode: ASImageNode
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public var contentEdgeInsets: UIEdgeInsets = UIEdgeInsets() {
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didSet {
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if self.contentEdgeInsets != oldValue {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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}
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}
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public var contentHorizontalAlignment: ASHorizontalAlignment = .middle {
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didSet {
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if self.contentHorizontalAlignment != oldValue {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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}
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}
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public var laysOutHorizontally: Bool = true {
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didSet {
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if self.laysOutHorizontally != oldValue {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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}
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}
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public var contentSpacing: CGFloat = 0.0 {
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didSet {
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if self.contentSpacing != oldValue {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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}
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}
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private var calculatedTitleSize: CGSize = CGSize()
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private var calculatedHighlightedTitleSize: CGSize = CGSize()
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override public init() {
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self.titleNode = ImmediateTextNode()
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self.titleNode.isUserInteractionEnabled = false
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self.titleNode.displaysAsynchronously = false
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self.highlightedTitleNode = ImmediateTextNode()
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self.highlightedTitleNode.isUserInteractionEnabled = false
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self.highlightedTitleNode.displaysAsynchronously = false
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self.imageNode = ASImageNode()
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self.imageNode.isUserInteractionEnabled = false
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self.imageNode.displaysAsynchronously = false
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self.imageNode.displayWithoutProcessing = true
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self.backgroundImageNode = ASImageNode()
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self.backgroundImageNode.isUserInteractionEnabled = false
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self.backgroundImageNode.displaysAsynchronously = false
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self.backgroundImageNode.displayWithoutProcessing = true
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self.highlightedBackgroundImageNode = ASImageNode()
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self.highlightedBackgroundImageNode.isUserInteractionEnabled = false
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self.highlightedBackgroundImageNode.displaysAsynchronously = false
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self.highlightedBackgroundImageNode.displayWithoutProcessing = true
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super.init()
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self.addSubnode(self.backgroundImageNode)
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self.addSubnode(self.highlightedBackgroundImageNode)
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self.highlightedBackgroundImageNode.isHidden = true
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self.addSubnode(self.titleNode)
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self.addSubnode(self.highlightedTitleNode)
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self.highlightedTitleNode.isHidden = true
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self.addSubnode(self.imageNode)
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}
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override open func calculateSizeThatFits(_ constrainedSize: CGSize) -> CGSize {
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let horizontalInsets = self.contentEdgeInsets.left + self.contentEdgeInsets.right
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let verticalInsets = self.contentEdgeInsets.top + self.contentEdgeInsets.bottom
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let imageSize = self.imageNode.image?.size ?? CGSize()
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let widthForTitle: CGFloat
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if self.laysOutHorizontally {
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widthForTitle = max(1.0, constrainedSize.width - horizontalInsets - imageSize.width - (imageSize.width.isZero ? 0.0 : self.contentSpacing))
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} else {
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widthForTitle = max(1.0, constrainedSize.width - horizontalInsets)
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}
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let normalTitleSize = self.titleNode.updateLayout(CGSize(width: widthForTitle, height: max(1.0, constrainedSize.height - verticalInsets)))
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self.calculatedTitleSize = normalTitleSize
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let highlightedTitleSize = self.highlightedTitleNode.updateLayout(CGSize(width: widthForTitle, height: max(1.0, constrainedSize.height - verticalInsets)))
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self.calculatedHighlightedTitleSize = highlightedTitleSize
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let titleSize = CGSize(width: max(normalTitleSize.width, highlightedTitleSize.width), height: max(normalTitleSize.height, highlightedTitleSize.height))
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var contentSize: CGSize
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if self.laysOutHorizontally {
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contentSize = CGSize(width: titleSize.width + imageSize.width, height: max(titleSize.height, imageSize.height))
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if !titleSize.width.isZero && !imageSize.width.isZero {
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contentSize.width += self.contentSpacing
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}
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} else {
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contentSize = CGSize(width: max(titleSize.width, imageSize.width), height: titleSize.height + imageSize.height)
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if !titleSize.width.isZero && !imageSize.width.isZero {
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contentSize.height += self.contentSpacing
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}
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}
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return CGSize(width: min(constrainedSize.width, contentSize.width + self.contentEdgeInsets.left + self.contentEdgeInsets.right), height: min(constrainedSize.height, contentSize.height + self.contentEdgeInsets.top + self.contentEdgeInsets.bottom))
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}
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open func setAttributedTitle(_ title: NSAttributedString, for state: UIControl.State) {
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if state == [] {
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if let attributedText = self.titleNode.attributedText {
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if !attributedText.isEqual(to: title) {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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} else {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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self.titleNode.attributedText = title
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if let attributedText = self.highlightedTitleNode.attributedText {
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if !attributedText.isEqual(to: title) {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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} else {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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self.highlightedTitleNode.attributedText = title
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} else if state == .highlighted || state == .selected {
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if let attributedText = self.highlightedTitleNode.attributedText {
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if !attributedText.isEqual(to: title) {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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} else {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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self.highlightedTitleNode.attributedText = title
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} else {
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if let attributedText = self.titleNode.attributedText {
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if !attributedText.isEqual(to: title) {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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} else {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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self.titleNode.attributedText = title
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}
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}
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open func attributedTitle(for state: UIControl.State) -> NSAttributedString? {
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if state == .highlighted || state == .selected {
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return self.highlightedTitleNode.attributedText
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} else {
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return self.titleNode.attributedText
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}
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}
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open func setTitle(_ title: String, with font: UIFont, with color: UIColor, for state: UIControl.State) {
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self.setAttributedTitle(NSAttributedString(string: title, font: font, textColor: color), for: state)
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}
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open func setImage(_ image: UIImage?, for state: UIControl.State) {
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if image?.size != self.imageNode.image?.size {
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self.invalidateCalculatedLayout()
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self.setNeedsLayout()
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}
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self.imageNode.image = image
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}
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open func setBackgroundImage(_ image: UIImage?, for state: UIControl.State) {
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if state == [] {
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self.backgroundImageNode.image = image
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self.highlightedBackgroundImageNode.image = image
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} else if state == .highlighted || state == .selected {
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self.highlightedBackgroundImageNode.image = image
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} else {
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self.backgroundImageNode.image = image
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}
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}
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open func image(for state: UIControl.State) -> UIImage? {
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return self.imageNode.image
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}
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open func backgroundImage(for state: UIControl.State) -> UIImage? {
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return self.backgroundImageNode.image
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}
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override open var isHighlighted: Bool {
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didSet {
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if self.isHighlighted != oldValue {
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if self.isHighlighted {
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if self.highlightedTitleNode.attributedText != nil {
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self.highlightedTitleNode.isHidden = false
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self.titleNode.isHidden = true
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} else {
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self.highlightedTitleNode.isHidden = true
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self.titleNode.isHidden = false
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}
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if self.highlightedBackgroundImageNode.image != nil {
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self.highlightedBackgroundImageNode.isHidden = false
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self.backgroundImageNode.isHidden = true
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} else {
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self.highlightedBackgroundImageNode.isHidden = true
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self.backgroundImageNode.isHidden = false
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}
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} else {
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self.highlightedTitleNode.isHidden = true
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self.titleNode.isHidden = false
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self.highlightedBackgroundImageNode.isHidden = true
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self.backgroundImageNode.isHidden = false
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}
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}
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}
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}
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override open func layout() {
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let size = self.bounds.size
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let contentRect = CGRect(origin: CGPoint(x: self.contentEdgeInsets.left, y: self.contentEdgeInsets.top), size: CGSize(width: size.width - self.contentEdgeInsets.left - self.contentEdgeInsets.right, height: size.height - self.contentEdgeInsets.top - self.contentEdgeInsets.bottom))
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let imageSize = self.imageNode.image?.size ?? CGSize()
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let titleOrigin: CGPoint
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let highlightedTitleOrigin: CGPoint
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let imageOrigin: CGPoint
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if self.laysOutHorizontally {
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switch self.contentHorizontalAlignment {
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case .left:
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titleOrigin = CGPoint(x: contentRect.minX, y: contentRect.minY + floor((contentRect.height - self.calculatedTitleSize.height) / 2.0))
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highlightedTitleOrigin = CGPoint(x: contentRect.minX, y: contentRect.minY + floor((contentRect.height - self.calculatedHighlightedTitleSize.height) / 2.0))
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imageOrigin = CGPoint(x: titleOrigin.x + self.calculatedTitleSize.width + self.contentSpacing, y: contentRect.minY + floor((contentRect.height - imageSize.height) / 2.0))
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case .right:
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titleOrigin = CGPoint(x: contentRect.maxX - self.calculatedTitleSize.width, y: contentRect.minY + floor((contentRect.height - self.calculatedTitleSize.height) / 2.0))
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highlightedTitleOrigin = CGPoint(x: contentRect.maxX - self.calculatedHighlightedTitleSize.width, y: contentRect.minY + floor((contentRect.height - self.calculatedHighlightedTitleSize.height) / 2.0))
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imageOrigin = CGPoint(x: titleOrigin.x - self.contentSpacing - imageSize.width, y: contentRect.minY + floor((contentRect.height - imageSize.height) / 2.0))
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default:
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titleOrigin = CGPoint(x: contentRect.minY + floor((contentRect.width - self.calculatedTitleSize.width) / 2.0), y: contentRect.minY + floor((contentRect.height - self.calculatedTitleSize.height) / 2.0))
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highlightedTitleOrigin = CGPoint(x: floor((contentRect.width - self.calculatedHighlightedTitleSize.width) / 2.0), y: contentRect.minY + floor((contentRect.height - self.calculatedHighlightedTitleSize.height) / 2.0))
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imageOrigin = CGPoint(x: floor((contentRect.width - imageSize.width) / 2.0), y: contentRect.minY + floor((contentRect.height - imageSize.height) / 2.0))
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}
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} else {
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var contentHeight: CGFloat = self.calculatedTitleSize.height
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if !imageSize.height.isZero {
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contentHeight += self.contentSpacing + imageSize.height
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}
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let contentY = contentRect.minY + floor((contentRect.height - contentHeight) / 2.0)
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titleOrigin = CGPoint(x: contentRect.minX + floor((contentRect.width - self.calculatedTitleSize.width) / 2.0), y: contentY + contentHeight - self.calculatedTitleSize.height)
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highlightedTitleOrigin = CGPoint(x: contentRect.minX + floor((contentRect.width - self.calculatedHighlightedTitleSize.width) / 2.0), y: contentY + contentHeight - self.calculatedHighlightedTitleSize.height)
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imageOrigin = CGPoint(x: floor((contentRect.width - imageSize.width) / 2.0), y: contentY)
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}
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self.titleNode.frame = CGRect(origin: titleOrigin, size: self.calculatedTitleSize)
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self.highlightedTitleNode.frame = CGRect(origin: highlightedTitleOrigin, size: self.calculatedHighlightedTitleSize)
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self.imageNode.frame = CGRect(origin: imageOrigin, size: imageSize)
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self.backgroundImageNode.frame = CGRect(origin: CGPoint(), size: size)
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self.highlightedBackgroundImageNode.frame = CGRect(origin: CGPoint(), size: size)
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}
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}
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