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Ali
381
submodules/Display/Source/TextAlertController.swift
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381
submodules/Display/Source/TextAlertController.swift
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import Foundation
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import UIKit
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import AsyncDisplayKit
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import Markdown
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private let alertWidth: CGFloat = 270.0
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public enum TextAlertActionType {
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case genericAction
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case defaultAction
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case destructiveAction
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}
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public struct TextAlertAction {
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public let type: TextAlertActionType
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public let title: String
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public let action: () -> Void
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public init(type: TextAlertActionType, title: String, action: @escaping () -> Void) {
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self.type = type
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self.title = title
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self.action = action
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}
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}
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public final class TextAlertContentActionNode: HighlightableButtonNode {
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private var theme: AlertControllerTheme
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let action: TextAlertAction
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private let backgroundNode: ASDisplayNode
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public init(theme: AlertControllerTheme, action: TextAlertAction) {
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self.theme = theme
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self.action = action
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self.backgroundNode = ASDisplayNode()
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self.backgroundNode.isLayerBacked = true
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self.backgroundNode.alpha = 0.0
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super.init()
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self.titleNode.maximumNumberOfLines = 2
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self.highligthedChanged = { [weak self] value in
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if let strongSelf = self {
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if value {
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if strongSelf.backgroundNode.supernode == nil {
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strongSelf.insertSubnode(strongSelf.backgroundNode, at: 0)
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}
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strongSelf.backgroundNode.layer.removeAnimation(forKey: "opacity")
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strongSelf.backgroundNode.alpha = 1.0
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} else if !strongSelf.backgroundNode.alpha.isZero {
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strongSelf.backgroundNode.alpha = 0.0
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strongSelf.backgroundNode.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.25)
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}
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}
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}
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self.updateTheme(theme)
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}
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public var actionEnabled: Bool = true {
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didSet {
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self.isUserInteractionEnabled = self.actionEnabled
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self.updateTitle()
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}
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}
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public func updateTheme(_ theme: AlertControllerTheme) {
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self.theme = theme
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self.backgroundNode.backgroundColor = theme.highlightedItemColor
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self.updateTitle()
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}
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private func updateTitle() {
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var font = Font.regular(17.0)
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var color: UIColor
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switch self.action.type {
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case .defaultAction, .genericAction:
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color = self.actionEnabled ? self.theme.accentColor : self.theme.disabledColor
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case .destructiveAction:
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color = self.actionEnabled ? self.theme.destructiveColor : self.theme.disabledColor
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}
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switch self.action.type {
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case .defaultAction:
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font = Font.semibold(17.0)
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case .destructiveAction, .genericAction:
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break
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}
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self.setAttributedTitle(NSAttributedString(string: self.action.title, font: font, textColor: color, paragraphAlignment: .center), for: [])
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}
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override public func didLoad() {
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super.didLoad()
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self.addTarget(self, action: #selector(self.pressed), forControlEvents: .touchUpInside)
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}
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@objc func pressed() {
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self.action.action()
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}
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override public func layout() {
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super.layout()
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self.backgroundNode.frame = self.bounds
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}
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}
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public enum TextAlertContentActionLayout {
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case horizontal
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case vertical
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}
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public final class TextAlertContentNode: AlertContentNode {
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private var theme: AlertControllerTheme
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private let actionLayout: TextAlertContentActionLayout
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private let titleNode: ImmediateTextNode?
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private let textNode: ImmediateTextNode
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private let actionNodesSeparator: ASDisplayNode
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private let actionNodes: [TextAlertContentActionNode]
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private let actionVerticalSeparators: [ASDisplayNode]
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private var validLayout: CGSize?
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public var textAttributeAction: (NSAttributedString.Key, (Any) -> Void)? {
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didSet {
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if let (attribute, textAttributeAction) = self.textAttributeAction {
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self.textNode.highlightAttributeAction = { attributes in
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if let _ = attributes[attribute] {
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return attribute
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} else {
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return nil
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}
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}
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self.textNode.tapAttributeAction = { attributes in
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if let value = attributes[attribute] {
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textAttributeAction(value)
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}
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}
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self.textNode.linkHighlightColor = self.theme.accentColor.withAlphaComponent(0.5)
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} else {
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self.textNode.highlightAttributeAction = nil
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self.textNode.tapAttributeAction = nil
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}
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}
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}
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public init(theme: AlertControllerTheme, title: NSAttributedString?, text: NSAttributedString, actions: [TextAlertAction], actionLayout: TextAlertContentActionLayout) {
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self.theme = theme
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self.actionLayout = actionLayout
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if let title = title {
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let titleNode = ImmediateTextNode()
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titleNode.attributedText = title
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titleNode.displaysAsynchronously = false
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titleNode.isUserInteractionEnabled = false
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titleNode.maximumNumberOfLines = 2
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titleNode.truncationType = .end
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titleNode.isAccessibilityElement = true
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self.titleNode = titleNode
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} else {
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self.titleNode = nil
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}
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self.textNode = ImmediateTextNode()
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self.textNode.maximumNumberOfLines = 0
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self.textNode.attributedText = text
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self.textNode.displaysAsynchronously = false
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self.textNode.isLayerBacked = false
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self.textNode.isAccessibilityElement = true
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self.textNode.accessibilityLabel = text.string
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self.textNode.insets = UIEdgeInsets(top: 1.0, left: 1.0, bottom: 1.0, right: 1.0)
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if text.length != 0 {
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if let paragraphStyle = text.attribute(.paragraphStyle, at: 0, effectiveRange: nil) as? NSParagraphStyle {
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self.textNode.textAlignment = paragraphStyle.alignment
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}
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}
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self.actionNodesSeparator = ASDisplayNode()
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self.actionNodesSeparator.isLayerBacked = true
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self.actionNodesSeparator.backgroundColor = theme.separatorColor
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self.actionNodes = actions.map { action -> TextAlertContentActionNode in
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return TextAlertContentActionNode(theme: theme, action: action)
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}
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var actionVerticalSeparators: [ASDisplayNode] = []
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if actions.count > 1 {
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for _ in 0 ..< actions.count - 1 {
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let separatorNode = ASDisplayNode()
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separatorNode.isLayerBacked = true
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separatorNode.backgroundColor = theme.separatorColor
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actionVerticalSeparators.append(separatorNode)
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}
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}
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self.actionVerticalSeparators = actionVerticalSeparators
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super.init()
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if let titleNode = self.titleNode {
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self.addSubnode(titleNode)
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}
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self.addSubnode(self.textNode)
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self.addSubnode(self.actionNodesSeparator)
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for actionNode in self.actionNodes {
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self.addSubnode(actionNode)
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}
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for separatorNode in self.actionVerticalSeparators {
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self.addSubnode(separatorNode)
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}
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}
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override public func updateTheme(_ theme: AlertControllerTheme) {
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self.theme = theme
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if let titleNode = self.titleNode, let attributedText = titleNode.attributedText {
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let updatedText = NSMutableAttributedString(attributedString: attributedText)
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updatedText.addAttribute(NSAttributedString.Key.foregroundColor, value: theme.primaryColor, range: NSRange(location: 0, length: updatedText.length))
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titleNode.attributedText = updatedText
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}
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if let attributedText = self.textNode.attributedText {
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let updatedText = NSMutableAttributedString(attributedString: attributedText)
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updatedText.addAttribute(NSAttributedString.Key.foregroundColor, value: theme.primaryColor, range: NSRange(location: 0, length: updatedText.length))
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self.textNode.attributedText = updatedText
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}
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self.actionNodesSeparator.backgroundColor = theme.separatorColor
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for actionNode in self.actionNodes {
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actionNode.updateTheme(theme)
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}
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for separatorNode in self.actionVerticalSeparators {
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separatorNode.backgroundColor = theme.separatorColor
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}
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if let size = self.validLayout {
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_ = self.updateLayout(size: size, transition: .immediate)
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}
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}
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override public func updateLayout(size: CGSize, transition: ContainedViewLayoutTransition) -> CGSize {
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self.validLayout = size
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let insets = UIEdgeInsets(top: 18.0, left: 18.0, bottom: 18.0, right: 18.0)
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var size = size
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size.width = min(size.width, alertWidth)
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var titleSize: CGSize?
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if let titleNode = self.titleNode {
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titleSize = titleNode.updateLayout(CGSize(width: size.width - insets.left - insets.right, height: CGFloat.greatestFiniteMagnitude))
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}
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let textSize = self.textNode.updateLayout(CGSize(width: size.width - insets.left - insets.right, height: CGFloat.greatestFiniteMagnitude))
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let actionButtonHeight: CGFloat = 44.0
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var minActionsWidth: CGFloat = 0.0
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let maxActionWidth: CGFloat = floor(size.width / CGFloat(self.actionNodes.count))
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let actionTitleInsets: CGFloat = 8.0
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var effectiveActionLayout = self.actionLayout
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for actionNode in self.actionNodes {
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let actionTitleSize = actionNode.titleNode.updateLayout(CGSize(width: maxActionWidth, height: actionButtonHeight))
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if case .horizontal = effectiveActionLayout, actionTitleSize.height > actionButtonHeight * 0.6667 {
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effectiveActionLayout = .vertical
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}
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switch effectiveActionLayout {
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case .horizontal:
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minActionsWidth += actionTitleSize.width + actionTitleInsets
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case .vertical:
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minActionsWidth = max(minActionsWidth, actionTitleSize.width + actionTitleInsets)
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}
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}
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let resultSize: CGSize
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var actionsHeight: CGFloat = 0.0
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switch effectiveActionLayout {
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case .horizontal:
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actionsHeight = actionButtonHeight
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case .vertical:
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actionsHeight = actionButtonHeight * CGFloat(self.actionNodes.count)
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}
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let contentWidth = alertWidth - insets.left - insets.right
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if let titleNode = self.titleNode, let titleSize = titleSize {
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let spacing: CGFloat = 6.0
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let titleFrame = CGRect(origin: CGPoint(x: insets.left + floor((contentWidth - titleSize.width) / 2.0), y: insets.top), size: titleSize)
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transition.updateFrame(node: titleNode, frame: titleFrame)
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let textFrame = CGRect(origin: CGPoint(x: insets.left + floor((contentWidth - textSize.width) / 2.0), y: titleFrame.maxY + spacing), size: textSize)
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transition.updateFrame(node: self.textNode, frame: textFrame.offsetBy(dx: -1.0, dy: -1.0))
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resultSize = CGSize(width: contentWidth + insets.left + insets.right, height: titleSize.height + spacing + textSize.height + actionsHeight + insets.top + insets.bottom)
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} else {
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let textFrame = CGRect(origin: CGPoint(x: insets.left + floor((contentWidth - textSize.width) / 2.0), y: insets.top), size: textSize)
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transition.updateFrame(node: self.textNode, frame: textFrame)
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resultSize = CGSize(width: contentWidth + insets.left + insets.right, height: textSize.height + actionsHeight + insets.top + insets.bottom)
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}
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self.actionNodesSeparator.frame = CGRect(origin: CGPoint(x: 0.0, y: resultSize.height - actionsHeight - UIScreenPixel), size: CGSize(width: resultSize.width, height: UIScreenPixel))
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var actionOffset: CGFloat = 0.0
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let actionWidth: CGFloat = floor(resultSize.width / CGFloat(self.actionNodes.count))
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var separatorIndex = -1
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var nodeIndex = 0
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for actionNode in self.actionNodes {
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if separatorIndex >= 0 {
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let separatorNode = self.actionVerticalSeparators[separatorIndex]
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switch effectiveActionLayout {
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case .horizontal:
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transition.updateFrame(node: separatorNode, frame: CGRect(origin: CGPoint(x: actionOffset - UIScreenPixel, y: resultSize.height - actionsHeight), size: CGSize(width: UIScreenPixel, height: actionsHeight - UIScreenPixel)))
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case .vertical:
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transition.updateFrame(node: separatorNode, frame: CGRect(origin: CGPoint(x: 0.0, y: resultSize.height - actionsHeight + actionOffset - UIScreenPixel), size: CGSize(width: resultSize.width, height: UIScreenPixel)))
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}
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}
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separatorIndex += 1
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let currentActionWidth: CGFloat
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switch effectiveActionLayout {
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case .horizontal:
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if nodeIndex == self.actionNodes.count - 1 {
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currentActionWidth = resultSize.width - actionOffset
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} else {
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currentActionWidth = actionWidth
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}
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case .vertical:
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currentActionWidth = resultSize.width
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}
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let actionNodeFrame: CGRect
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switch effectiveActionLayout {
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case .horizontal:
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actionNodeFrame = CGRect(origin: CGPoint(x: actionOffset, y: resultSize.height - actionsHeight), size: CGSize(width: currentActionWidth, height: actionButtonHeight))
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actionOffset += currentActionWidth
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case .vertical:
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actionNodeFrame = CGRect(origin: CGPoint(x: 0.0, y: resultSize.height - actionsHeight + actionOffset), size: CGSize(width: currentActionWidth, height: actionButtonHeight))
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actionOffset += actionButtonHeight
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}
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transition.updateFrame(node: actionNode, frame: actionNodeFrame)
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nodeIndex += 1
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}
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return resultSize
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}
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}
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public func textAlertController(theme: AlertControllerTheme, title: NSAttributedString?, text: NSAttributedString, actions: [TextAlertAction], actionLayout: TextAlertContentActionLayout = .horizontal) -> AlertController {
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return AlertController(theme: theme, contentNode: TextAlertContentNode(theme: theme, title: title, text: text, actions: actions, actionLayout: actionLayout))
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}
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public func standardTextAlertController(theme: AlertControllerTheme, title: String?, text: String, actions: [TextAlertAction], actionLayout: TextAlertContentActionLayout = .horizontal, allowInputInset: Bool = true, parseMarkdown: Bool = false) -> AlertController {
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var dismissImpl: (() -> Void)?
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let attributedText: NSAttributedString
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if parseMarkdown {
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let font = title == nil ? Font.semibold(17.0) : Font.regular(13.0)
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let boldFont = title == nil ? Font.bold(17.0) : Font.semibold(13.0)
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let body = MarkdownAttributeSet(font: font, textColor: theme.primaryColor)
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let bold = MarkdownAttributeSet(font: boldFont, textColor: theme.primaryColor)
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attributedText = parseMarkdownIntoAttributedString(text, attributes: MarkdownAttributes(body: body, bold: bold, link: body, linkAttribute: { _ in nil }), textAlignment: .center)
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} else {
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attributedText = NSAttributedString(string: text, font: title == nil ? Font.semibold(17.0) : Font.regular(13.0), textColor: theme.primaryColor, paragraphAlignment: .center)
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}
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let controller = AlertController(theme: theme, contentNode: TextAlertContentNode(theme: theme, title: title != nil ? NSAttributedString(string: title!, font: Font.semibold(17.0), textColor: theme.primaryColor, paragraphAlignment: .center) : nil, text: attributedText, actions: actions.map { action in
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return TextAlertAction(type: action.type, title: action.title, action: {
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dismissImpl?()
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action.action()
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})
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}, actionLayout: actionLayout), allowInputInset: allowInputInset)
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dismissImpl = { [weak controller] in
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controller?.dismissAnimated()
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}
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return controller
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}
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Reference in New Issue
Block a user