Swiftgram/TelegramUI/ChatTextInputPanelNode.swift
2016-09-05 23:21:13 +03:00

212 lines
11 KiB
Swift

import Foundation
import UIKit
import Display
import AsyncDisplayKit
import WebKit
private let textInputViewBackground: UIImage = {
let diameter: CGFloat = 10.0
UIGraphicsBeginImageContextWithOptions(CGSize(width: diameter, height: diameter), true, 0.0)
let context = UIGraphicsGetCurrentContext()!
context.setFillColor(UIColor(0xfafafa).cgColor)
context.fill(CGRect(x: 0.0, y: 0.0, width: diameter, height: diameter))
context.setFillColor(UIColor.white.cgColor)
context.fillEllipse(in: CGRect(x: 0.0, y: 0.0, width: diameter, height: diameter))
context.setStrokeColor(UIColor(0xc7c7cc).cgColor)
let strokeWidth: CGFloat = 0.5
context.setLineWidth(strokeWidth)
context.strokeEllipse(in: CGRect(x: strokeWidth / 2.0, y: strokeWidth / 2.0, width: diameter - strokeWidth, height: diameter - strokeWidth))
let image = UIGraphicsGetImageFromCurrentImageContext()!.stretchableImage(withLeftCapWidth: Int(diameter / 2.0), topCapHeight: Int(diameter / 2.0))
UIGraphicsEndImageContext()
return image
}()
private let attachmentIcon = UIImage(bundleImageName: "Chat/Input/Text/IconAttachment")?.precomposed()
class ChatTextInputPanelNode: ChatInputPanelNode, ASEditableTextNodeDelegate {
var textPlaceholderNode: TextNode
var textInputNode: ASEditableTextNode?
let textInputBackgroundView: UIImageView
let sendButton: UIButton
let attachmentButton: UIButton
var displayAttachmentMenu: () -> Void = { }
var sendMessage: () -> Void = { }
var updateHeight: () -> Void = { }
var text: String {
get {
return self.textInputNode?.attributedText?.string ?? ""
} set(value) {
if let textInputNode = self.textInputNode {
textInputNode.attributedText = NSAttributedString(string: value, font: Font.regular(16.0), textColor: UIColor.black)
self.editableTextNodeDidUpdateText(textInputNode)
}
}
}
let textFieldInsets = UIEdgeInsets(top: 9.0, left: 41.0, bottom: 8.0, right: 0.0)
let textInputViewInternalInsets = UIEdgeInsets(top: 4.0, left: 5.0, bottom: 4.0, right: 5.0)
override init() {
self.textInputBackgroundView = UIImageView(image: textInputViewBackground)
self.textPlaceholderNode = TextNode()
self.attachmentButton = UIButton()
self.sendButton = UIButton()
super.init()
self.attachmentButton.setImage(attachmentIcon, for: [])
self.attachmentButton.addTarget(self, action: #selector(self.attachmentButtonPressed), for: .touchUpInside)
self.view.addSubview(self.attachmentButton)
self.sendButton.titleLabel?.font = Font.medium(17.0)
self.sendButton.contentEdgeInsets = UIEdgeInsets(top: 8.0, left: 6.0, bottom: 8.0, right: 6.0)
self.sendButton.setTitleColor(UIColor(0x1195f2), for: [])
self.sendButton.setTitleColor(UIColor.gray, for: [.highlighted])
self.sendButton.setTitle("Send", for: [])
self.sendButton.sizeToFit()
self.sendButton.addTarget(self, action: #selector(self.sendButtonPressed), for: .touchUpInside)
self.view.addSubview(self.textInputBackgroundView)
let placeholderLayout = TextNode.asyncLayout(self.textPlaceholderNode)
let (placeholderSize, placeholderApply) = placeholderLayout(NSAttributedString(string: "Message", font: Font.regular(16.0), textColor: UIColor(0xbebec0)), nil, 1, .end, CGSize(width: 320.0, height: CGFloat.greatestFiniteMagnitude), nil)
self.textPlaceholderNode.frame = CGRect(origin: CGPoint(), size: placeholderSize.size)
let _ = placeholderApply()
self.addSubnode(self.textPlaceholderNode)
self.view.addSubview(self.sendButton)
self.textInputBackgroundView.clipsToBounds = true
self.textInputBackgroundView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.textInputBackgroundViewTap(_:))))
self.textInputBackgroundView.isUserInteractionEnabled = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func loadTextInputNode() {
let textInputNode = ASEditableTextNode()
textInputNode.typingAttributes = [NSFontAttributeName: Font.regular(16.0)]
textInputNode.clipsToBounds = true
textInputNode.delegate = self
self.addSubnode(textInputNode)
self.textInputNode = textInputNode
let sendButtonSize = self.sendButton.bounds.size
textInputNode.frame = CGRect(x: self.textFieldInsets.left + self.textInputViewInternalInsets.left, y: self.textFieldInsets.top + self.textInputViewInternalInsets.top, width: self.frame.size.width - self.textFieldInsets.left - self.textFieldInsets.right - sendButtonSize.width - self.textInputViewInternalInsets.left - self.textInputViewInternalInsets.right, height: self.frame.size.height - self.textFieldInsets.top - self.textFieldInsets.bottom - self.textInputViewInternalInsets.top - self.textInputViewInternalInsets.bottom)
self.textInputBackgroundView.isUserInteractionEnabled = false
self.textInputBackgroundView.removeGestureRecognizer(self.textInputBackgroundView.gestureRecognizers![0])
}
override func calculateSizeThatFits(_ constrainedSize: CGSize) -> CGSize {
let sendButtonSize = self.sendButton.bounds.size
let textFieldHeight: CGFloat
if let textInputNode = self.textInputNode {
textFieldHeight = min(115.0, max(20.0, ceil(textInputNode.measure(CGSize(width: constrainedSize.width - self.textFieldInsets.left - self.textFieldInsets.right - sendButtonSize.width - self.textInputViewInternalInsets.left - self.textInputViewInternalInsets.right, height: constrainedSize.height)).height)))
} else {
textFieldHeight = 20.0
}
return CGSize(width: constrainedSize.width, height: textFieldHeight + self.textFieldInsets.top + self.textFieldInsets.bottom + self.textInputViewInternalInsets.top + self.textInputViewInternalInsets.bottom)
}
override var frame: CGRect {
get {
return super.frame
} set(value) {
super.frame = value
}
}
override func updateFrames(transition: ContainedViewLayoutTransition) {
let bounds = self.bounds
let sendButtonSize = self.sendButton.bounds.size
let minimalHeight: CGFloat = 45.0
transition.updateFrame(layer: self.sendButton.layer, frame: CGRect(x: bounds.size.width - sendButtonSize.width, y: bounds.height - minimalHeight + floor((minimalHeight - sendButtonSize.height) / 2.0), width: sendButtonSize.width, height: sendButtonSize.height))
transition.updateFrame(layer: self.attachmentButton.layer, frame: CGRect(origin: CGPoint(x: 0.0, y: bounds.height - minimalHeight), size: CGSize(width: 40.0, height: minimalHeight)))
if let textInputNode = self.textInputNode {
transition.updateFrame(node: textInputNode, frame: CGRect(x: self.textFieldInsets.left + self.textInputViewInternalInsets.left, y: self.textFieldInsets.top + self.textInputViewInternalInsets.top, width: bounds.size.width - self.textFieldInsets.left - self.textFieldInsets.right - sendButtonSize.width - self.textInputViewInternalInsets.left - self.textInputViewInternalInsets.right, height: bounds.size.height - self.textFieldInsets.top - self.textFieldInsets.bottom - self.textInputViewInternalInsets.top - self.textInputViewInternalInsets.bottom))
}
transition.updateFrame(node: self.textPlaceholderNode, frame: CGRect(origin: CGPoint(x: self.textFieldInsets.left + self.textInputViewInternalInsets.left, y: self.textFieldInsets.top + self.textInputViewInternalInsets.top + 0.5), size: self.textPlaceholderNode.frame.size))
transition.updateFrame(layer: self.textInputBackgroundView.layer, frame: CGRect(x: self.textFieldInsets.left, y: self.textFieldInsets.top, width: bounds.size.width - self.textFieldInsets.left - self.textFieldInsets.right - sendButtonSize.width, height: bounds.size.height - self.textFieldInsets.top - self.textFieldInsets.bottom))
}
@objc func editableTextNodeDidUpdateText(_ editableTextNode: ASEditableTextNode) {
if let textInputNode = self.textInputNode {
self.textPlaceholderNode.isHidden = editableTextNode.attributedText?.length ?? 0 != 0
let constrainedSize = CGSize(width: self.frame.size.width, height: CGFloat.greatestFiniteMagnitude)
let sendButtonSize = self.sendButton.bounds.size
let textFieldHeight: CGFloat = min(115.0, max(20.0, ceil(textInputNode.measure(CGSize(width: constrainedSize.width - self.textFieldInsets.left - self.textFieldInsets.right - sendButtonSize.width - self.textInputViewInternalInsets.left - self.textInputViewInternalInsets.right, height: constrainedSize.height)).height)))
if abs(textFieldHeight - textInputNode.frame.size.height) > CGFloat(FLT_EPSILON) {
self.invalidateCalculatedLayout()
self.updateHeight()
}
}
}
@objc func sendButtonPressed() {
let text = self.textInputNode?.attributedText?.string ?? ""
if !text.isEmpty {
self.sendMessage()
}
}
@objc func attachmentButtonPressed() {
self.displayAttachmentMenu()
}
@objc func textInputBackgroundViewTap(_ recognizer: UITapGestureRecognizer) {
if case .ended = recognizer.state {
self.ensureFocused()
}
}
func ensureUnfocused() {
self.textInputNode?.resignFirstResponder()
}
func ensureFocused() {
if self.textInputNode == nil {
self.loadTextInputNode()
}
self.textInputNode?.becomeFirstResponder()
}
func animateTextSend() {
/*if let textInputNode = self.textInputNode {
let snapshot = textInputNode.view.snapshotViewAfterScreenUpdates(false)
snapshot.frame = self.textInputBackgroundView.convertRect(textInputNode.view.bounds, fromView: textInputNode.view)
self.textInputBackgroundView.addSubview(snapshot)
UIView.animateWithDuration(0.3, animations: {
snapshot.alpha = 0.0
snapshot.transform = CGAffineTransformMakeTranslation(0.0, -20.0)
}, completion: { _ in
snapshot.removeFromSuperview()
})
}*/
}
/*override func hitTest(point: CGPoint, withEvent event: UIEvent!) -> UIView! {
if let textInputNode = self.textInputNode where self.textInputBackgroundView.frame.contains(point) {
return textInputNode.view
}
return super.hitTest(point, withEvent: event)
}*/
}