Swiftgram/submodules/AttachmentTextInputPanelNode/Sources/AttachmentTextInputActionButtonsNode.swift

import Foundation
import UIKit
import AsyncDisplayKit
import Display
import TelegramCore
import TelegramPresentationData
import ContextUI
import ChatPresentationInterfaceState

final class AttachmentTextInputActionButtonsNode: ASDisplayNode {
    private let strings: PresentationStrings
    
    let sendContainerNode: ASDisplayNode
    let backgroundNode: ASDisplayNode
    let sendButton: HighlightTrackingButtonNode
    var sendButtonHasApplyIcon = false
    var animatingSendButton = false
    let textNode: ImmediateTextNode

    var sendButtonLongPressed: ((ASDisplayNode, ContextGesture) -> Void)?
    
    private var gestureRecognizer: ContextGesture?
    var sendButtonLongPressEnabled = false {
        didSet {
            self.gestureRecognizer?.isEnabled = self.sendButtonLongPressEnabled
        }
    }
    
    private var sendButtonPointerInteraction: PointerInteraction?
        
    private var validLayout: CGSize?
    
    init(presentationInterfaceState: ChatPresentationInterfaceState, presentController: @escaping (ViewController) -> Void) {
        let theme = presentationInterfaceState.theme
        let strings = presentationInterfaceState.strings
        self.strings = strings
                 
        self.sendContainerNode = ASDisplayNode()
        self.sendContainerNode.layer.allowsGroupOpacity = true
        
        self.backgroundNode = ASDisplayNode()
        self.backgroundNode.backgroundColor = theme.chat.inputPanel.actionControlFillColor
        self.backgroundNode.clipsToBounds = true
        self.sendButton = HighlightTrackingButtonNode(pointerStyle: nil)
                
        self.textNode = ImmediateTextNode()
        self.textNode.attributedText = NSAttributedString(string: self.strings.MediaPicker_Send, font: Font.semibold(17.0), textColor: theme.chat.inputPanel.actionControlForegroundColor)
        self.textNode.isUserInteractionEnabled = false
        
        super.init()
        
        self.isAccessibilityElement = true
        self.accessibilityTraits = [.button, .notEnabled]
        
        self.sendButton.highligthedChanged = { [weak self] highlighted in
            if let strongSelf = self {
                if strongSelf.sendButtonHasApplyIcon || !strongSelf.sendButtonLongPressEnabled {
                    if highlighted {
                        strongSelf.sendContainerNode.layer.removeAnimation(forKey: "opacity")
                        strongSelf.sendContainerNode.alpha = 0.4
                    } else {
                        strongSelf.sendContainerNode.alpha = 1.0
                        strongSelf.sendContainerNode.layer.animateAlpha(from: 0.4, to: 1.0, duration: 0.2)
                    }
                } else {
                    if highlighted {
                        strongSelf.sendContainerNode.layer.animateScale(from: 1.0, to: 0.75, duration: 0.4, removeOnCompletion: false)
                    } else if let presentationLayer = strongSelf.sendButton.layer.presentation() {
                        strongSelf.sendContainerNode.layer.animateScale(from: CGFloat((presentationLayer.value(forKeyPath: "transform.scale.y") as? NSNumber)?.floatValue ?? 1.0), to: 1.0, duration: 0.25, removeOnCompletion: false)
                    }
                }
            }
        }
        
        self.addSubnode(self.sendContainerNode)
        self.sendContainerNode.addSubnode(self.backgroundNode)
        self.sendContainerNode.addSubnode(self.sendButton)
        self.sendContainerNode.addSubnode(self.textNode)
    }
    
    override func didLoad() {
        super.didLoad()
        
        let gestureRecognizer = ContextGesture(target: nil, action: nil)
        gestureRecognizer.isEnabled = self.sendButtonLongPressEnabled
        self.gestureRecognizer = gestureRecognizer
        self.sendButton.view.addGestureRecognizer(gestureRecognizer)
        gestureRecognizer.activated = { [weak self] recognizer, _ in
            guard let strongSelf = self else {
                return
            }
            if !strongSelf.sendButtonHasApplyIcon {
                strongSelf.sendButtonLongPressed?(strongSelf.sendContainerNode, recognizer)
            }
        }
        
        self.sendButtonPointerInteraction = PointerInteraction(view: self.sendButton.view, customInteractionView: self.backgroundNode.view, style: .lift)
    }
    
    func updateTheme(theme: PresentationTheme, wallpaper: TelegramWallpaper) {
        self.backgroundNode.backgroundColor = theme.chat.inputPanel.actionControlFillColor
        
        self.textNode.attributedText = NSAttributedString(string: self.strings.MediaPicker_Send, font: Font.semibold(17.0), textColor: theme.chat.inputPanel.actionControlForegroundColor)
    }
    
    private var absoluteRect: (CGRect, CGSize)?
    func updateAbsoluteRect(_ rect: CGRect, within containerSize: CGSize, transition: ContainedViewLayoutTransition) {
        self.absoluteRect = (rect, containerSize)
    }
    
    func updateLayout(size: CGSize, transition: ContainedViewLayoutTransition, minimized: Bool, interfaceState: ChatPresentationInterfaceState) -> CGSize {
        self.validLayout = size
        
        let width: CGFloat
        let textSize = self.textNode.updateLayout(CGSize(width: 100.0, height: size.height))
        if minimized {
            width = 44.0
        } else {
            width = textSize.width + 36.0
        }
        
        let buttonSize = CGSize(width: width, height: size.height)
        
        transition.updateFrame(node: self.textNode, frame: CGRect(origin: CGPoint(x: floorToScreenPixels((width - textSize.width) / 2.0), y: floorToScreenPixels((buttonSize.height - textSize.height) / 2.0)), size: textSize))
        transition.updateAlpha(node: self.textNode, alpha: minimized ? 0.0 : 1.0)
        transition.updateAlpha(node: self.sendButton.imageNode, alpha: minimized ? 1.0 : 0.0)
        
        transition.updateFrame(layer: self.sendButton.layer, frame: CGRect(origin: CGPoint(), size: buttonSize))
        transition.updateFrame(node: self.sendContainerNode, frame: CGRect(origin: CGPoint(), size: buttonSize))
        
        let backgroundSize = CGSize(width: width - 11.0, height: 33.0)
        transition.updateFrame(node: self.backgroundNode, frame: CGRect(origin: CGPoint(x: floorToScreenPixels((width - backgroundSize.width) / 2.0), y: floorToScreenPixels((size.height - backgroundSize.height) / 2.0)), size: backgroundSize))
        self.backgroundNode.cornerRadius = backgroundSize.height / 2.0
        
        return buttonSize
    }
    
    func updateAccessibility() {
        self.accessibilityTraits = .button
        self.accessibilityLabel = self.strings.MediaPicker_Send
        self.accessibilityHint = nil
    }
}