Swiftgram/TelegramUI/WebpagePreviewAccessoryPanelNode.swift
2017-03-21 19:58:11 +03:00

132 lines
5.0 KiB
Swift

import Foundation
import AsyncDisplayKit
import TelegramCore
import Postbox
import SwiftSignalKit
import Display
private let lineImage = generateVerticallyStretchableFilledCircleImage(radius: 1.0, color: UIColor(0x007ee5))
private let closeButtonImage = generateImage(CGSize(width: 12.0, height: 12.0), contextGenerator: { size, context in
context.clear(CGRect(origin: CGPoint(), size: size))
context.setStrokeColor(UIColor(0x9099A2).cgColor)
context.setLineWidth(2.0)
context.setLineCap(.round)
context.move(to: CGPoint(x: 1.0, y: 1.0))
context.addLine(to: CGPoint(x: size.width - 1.0, y: size.height - 1.0))
context.strokePath()
context.move(to: CGPoint(x: size.width - 1.0, y: 1.0))
context.addLine(to: CGPoint(x: 1.0, y: size.height - 1.0))
context.strokePath()
})
final class WebpagePreviewAccessoryPanelNode: AccessoryPanelNode {
private let webpageDisposable = MetaDisposable()
private(set) var webpage: TelegramMediaWebpage
let closeButton: ASButtonNode
let lineNode: ASImageNode
let titleNode: ASTextNode
let textNode: ASTextNode
init(account: Account, webpage: TelegramMediaWebpage) {
self.webpage = webpage
self.closeButton = ASButtonNode()
self.closeButton.setImage(closeButtonImage, for: [])
self.closeButton.hitTestSlop = UIEdgeInsetsMake(-8.0, -8.0, -8.0, -8.0)
self.closeButton.displaysAsynchronously = false
self.lineNode = ASImageNode()
self.lineNode.displayWithoutProcessing = true
self.lineNode.displaysAsynchronously = false
self.lineNode.image = lineImage
self.titleNode = ASTextNode()
self.titleNode.truncationMode = .byTruncatingTail
self.titleNode.maximumNumberOfLines = 1
self.titleNode.displaysAsynchronously = false
self.textNode = ASTextNode()
self.textNode.truncationMode = .byTruncatingTail
self.textNode.maximumNumberOfLines = 1
self.textNode.displaysAsynchronously = false
super.init()
self.closeButton.addTarget(self, action: #selector(self.closePressed), forControlEvents: [.touchUpInside])
self.addSubnode(self.closeButton)
self.addSubnode(self.lineNode)
self.addSubnode(self.titleNode)
self.addSubnode(self.textNode)
self.updateWebpage()
}
deinit {
self.webpageDisposable.dispose()
}
func replaceWebpage(_ webpage: TelegramMediaWebpage) {
if !self.webpage.isEqual(webpage) {
self.webpage = webpage
self.updateWebpage()
}
}
private func updateWebpage() {
var authorName = ""
var text = ""
switch self.webpage.content {
case .Pending:
authorName = "Loading..."
case let .Loaded(content):
if let title = content.title {
authorName = title
} else if let websiteName = content.websiteName {
authorName = websiteName
} else {
authorName = content.displayUrl
}
text = content.text ?? ""
}
self.titleNode.attributedText = NSAttributedString(string: authorName, font: Font.medium(15.0), textColor: UIColor(0x007ee5))
self.textNode.attributedText = NSAttributedString(string: text, font: Font.regular(15.0), textColor: UIColor.black)
self.setNeedsLayout()
}
override func calculateSizeThatFits(_ constrainedSize: CGSize) -> CGSize {
return CGSize(width: constrainedSize.width, height: 45.0)
}
override func layout() {
super.layout()
let bounds = self.bounds
let leftInset: CGFloat = 55.0
let textLineInset: CGFloat = 10.0
let rightInset: CGFloat = 55.0
let textRightInset: CGFloat = 20.0
let closeButtonSize = self.closeButton.measure(CGSize(width: 100.0, height: 100.0))
self.closeButton.frame = CGRect(origin: CGPoint(x: bounds.size.width - rightInset - closeButtonSize.width, y: 19.0), size: closeButtonSize)
self.lineNode.frame = CGRect(origin: CGPoint(x: leftInset, y: 8.0), size: CGSize(width: 2.0, height: bounds.size.height - 10.0))
let titleSize = self.titleNode.measure(CGSize(width: bounds.size.width - leftInset - textLineInset - rightInset - textRightInset, height: bounds.size.height))
self.titleNode.frame = CGRect(origin: CGPoint(x: leftInset + textLineInset, y: 7.0), size: titleSize)
let textSize = self.textNode.measure(CGSize(width: bounds.size.width - leftInset - textLineInset - rightInset - textRightInset, height: bounds.size.height))
self.textNode.frame = CGRect(origin: CGPoint(x: leftInset + textLineInset, y: 25.0), size: textSize)
}
@objc func closePressed() {
if let dismiss = self.dismiss {
dismiss()
}
}
}