Swiftgram/TelegramUI/ChatListSearchItem.swift
2017-02-11 17:05:23 +03:00

128 lines
5.1 KiB
Swift

import Foundation
import UIKit
import AsyncDisplayKit
import Postbox
import Display
import SwiftSignalKit
private let searchBarFont = Font.regular(15.0)
private let pinnedBackgroundColor = UIColor(0xf7f7f7)
private let regularSearchBackgroundColor = UIColor(0xededed)
private let pinnedSearchBackgroundColor = UIColor(0xe5e5e5)
class ChatListSearchItem: ListViewItem {
let selectable: Bool = false
private let placeholder: String
private let activate: () -> Void
init(placeholder: String, activate: @escaping () -> Void) {
self.placeholder = placeholder
self.activate = activate
}
func nodeConfiguredForWidth(async: @escaping (@escaping () -> Void) -> Void, width: CGFloat, previousItem: ListViewItem?, nextItem: ListViewItem?, completion: @escaping (ListViewItemNode, @escaping () -> (Signal<Void, NoError>?, () -> Void)) -> Void) {
async {
let node = ChatListSearchItemNode()
node.placeholder = self.placeholder
let makeLayout = node.asyncLayout()
var nextIsPinned = false
if let nextItem = nextItem as? ChatListItem, nextItem.index.pinningIndex != nil {
nextIsPinned = true
}
let (layout, apply) = makeLayout(width, nextIsPinned)
node.contentSize = layout.contentSize
node.insets = layout.insets
node.activate = self.activate
completion(node, {
return (nil, {
apply(false)
})
})
}
}
func updateNode(async: @escaping (@escaping () -> Void) -> Void, node: ListViewItemNode, width: CGFloat, previousItem: ListViewItem?, nextItem: ListViewItem?, animation: ListViewItemUpdateAnimation, completion: @escaping (ListViewItemNodeLayout, @escaping () -> Void) -> Void) {
if let node = node as? ChatListSearchItemNode {
Queue.mainQueue().async {
let layout = node.asyncLayout()
async {
var nextIsPinned = false
if let nextItem = nextItem as? ChatListItem, nextItem.index.pinningIndex != nil {
nextIsPinned = true
}
let (nodeLayout, apply) = layout(width, nextIsPinned)
Queue.mainQueue().async {
completion(nodeLayout, {
apply(animation.isAnimated)
})
}
}
}
}
}
}
class ChatListSearchItemNode: ListViewItemNode {
let searchBarNode: SearchBarPlaceholderNode
var placeholder: String?
fileprivate var activate: (() -> Void)? {
didSet {
self.searchBarNode.activate = self.activate
}
}
required init() {
self.searchBarNode = SearchBarPlaceholderNode()
super.init(layerBacked: false, dynamicBounce: false)
self.addSubnode(self.searchBarNode)
}
override func layoutForWidth(_ width: CGFloat, item: ListViewItem, previousItem: ListViewItem?, nextItem: ListViewItem?) {
let makeLayout = self.asyncLayout()
var nextIsPinned = false
if let nextItem = nextItem as? ChatListItem, nextItem.index.pinningIndex != nil {
nextIsPinned = true
}
let (layout, apply) = makeLayout(width, nextIsPinned)
apply(false)
self.contentSize = layout.contentSize
self.insets = layout.insets
}
func asyncLayout() -> (_ width: CGFloat, _ nextIsPinned: Bool) -> (ListViewItemNodeLayout, (Bool) -> Void) {
let searchBarNodeLayout = self.searchBarNode.asyncLayout()
let placeholder = self.placeholder
return { width, nextIsPinned in
let searchBarApply = searchBarNodeLayout(NSAttributedString(string: placeholder ?? "Search", font: searchBarFont, textColor: UIColor(0x8e8e93)), CGSize(width: width - 16.0, height: CGFloat.greatestFiniteMagnitude), nextIsPinned ? pinnedSearchBackgroundColor : regularSearchBackgroundColor)
let layout = ListViewItemNodeLayout(contentSize: CGSize(width: width, height: 44.0 + 4.0), insets: UIEdgeInsets())
return (layout, { [weak self] animated in
if let strongSelf = self {
let transition: ContainedViewLayoutTransition
if animated {
transition = .animated(duration: 0.3, curve: .easeInOut)
} else {
transition = .immediate
}
strongSelf.searchBarNode.frame = CGRect(origin: CGPoint(x: 8.0, y: 8.0), size: CGSize(width: width - 16.0, height: 28.0))
searchBarApply()
strongSelf.searchBarNode.bounds = CGRect(origin: CGPoint(), size: CGSize(width: width - 16.0, height: 28.0))
transition.updateBackgroundColor(node: strongSelf, color: nextIsPinned ? pinnedBackgroundColor : UIColor.white)
}
})
}
}
}