[WIP] Stories

submodules/TelegramUI/Components/ShareWithPeersScreen/Sources/SectionHeaderComponent.swift

@@ -0,0 +1,108 @@
+import Foundation
+import UIKit
+import Display
+import ComponentFlow
+import TelegramPresentationData
+import MultilineTextComponent
+
+final class SectionHeaderComponent: Component {
+    let theme: PresentationTheme
+    let sideInset: CGFloat
+    let title: String
+    
+    init(
+        theme: PresentationTheme,
+        sideInset: CGFloat,
+        title: String
+    ) {
+        self.theme = theme
+        self.sideInset = sideInset
+        self.title = title
+    }
+    
+    static func ==(lhs: SectionHeaderComponent, rhs: SectionHeaderComponent) -> Bool {
+        if lhs.theme !== rhs.theme {
+            return false
+        }
+        if lhs.sideInset != rhs.sideInset {
+            return false
+        }
+        if lhs.title != rhs.title {
+            return false
+        }
+        return true
+    }
+    
+    final class View: UIView {        
+        private let title = ComponentView<Empty>()
+        private let backgroundView: BlurredBackgroundView
+        
+        private var component: SectionHeaderComponent?
+        private weak var state: EmptyComponentState?
+        
+        override init(frame: CGRect) {            
+            self.backgroundView = BlurredBackgroundView(color: .clear, enableBlur: true)
+            
+            super.init(frame: frame)
+            
+            self.addSubview(self.backgroundView)
+        }
+        
+        required init?(coder: NSCoder) {
+            fatalError("init(coder:) has not been implemented")
+        }
+        
+        func update(component: SectionHeaderComponent, availableSize: CGSize, state: EmptyComponentState, environment: Environment<Empty>, transition: Transition) -> CGSize {
+            let themeUpdated = self.component?.theme !== component.theme
+            
+            self.component = component
+            self.state = state
+            
+            let height: CGFloat = 28.0
+            let leftInset: CGFloat = component.sideInset
+            let rightInset: CGFloat = component.sideInset
+            
+            let previousTitleFrame = self.title.view?.frame
+            
+            if themeUpdated {
+                self.backgroundView.updateColor(color: component.theme.rootController.navigationBar.blurredBackgroundColor, transition: .immediate)
+            }
+            
+            let titleSize = self.title.update(
+                transition: .immediate,
+                component: AnyComponent(MultilineTextComponent(
+                    text: .plain(NSAttributedString(string: component.title, font: Font.regular(13.0), textColor: component.theme.list.itemSecondaryTextColor))
+                )),
+                environment: {},
+                containerSize: CGSize(width: availableSize.width - leftInset - rightInset, height: 100.0)
+            )
+            
+            let titleFrame = CGRect(origin: CGPoint(x: leftInset, y: floor((height - titleSize.height) / 2.0)), size: titleSize)
+            if let titleView = self.title.view {
+                if titleView.superview == nil {
+                    titleView.isUserInteractionEnabled = false
+                    self.addSubview(titleView)
+                }
+                titleView.frame = titleFrame
+                if let previousTitleFrame, previousTitleFrame.origin.x != titleFrame.origin.x {
+                    transition.animatePosition(view: titleView, from: CGPoint(x: previousTitleFrame.origin.x - titleFrame.origin.x, y: 0.0), to: CGPoint(), additive: true)
+                }
+            }
+            
+            let size = CGSize(width: availableSize.width, height: height)
+            
+            transition.setFrame(view: self.backgroundView, frame: CGRect(origin: CGPoint(), size: size))
+            self.backgroundView.update(size: size, transition: transition.containedViewLayoutTransition)
+            
+            return size
+        }
+    }
+    
+    func makeView() -> View {
+        return View(frame: CGRect())
+    }
+    
+    func update(view: View, availableSize: CGSize, state: EmptyComponentState, environment: Environment<Empty>, transition: Transition) -> CGSize {
+        return view.update(component: self, availableSize: availableSize, state: state, environment: environment, transition: transition)
+    }
+}