PeerInfoPaneTabsContainerNode
enum PeerInfoPaneKey
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case media
case files
case links
case voice
case music
case gifs
case groupsInCommon
case members
struct PeerInfoPaneSpecifier
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var key: PeerInfoPaneKey
var title: String
class PeerInfoPaneTabsContainerPaneNode
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private let pressed: () -> Void
private let titleNode: ImmediateTextNode
private let buttonNode: HighlightTrackingButtonNode
private var isSelected: Bool = false
@objc private func buttonPressed() {
self.pressed()
}
func updateText(_ title: String, isSelected: Bool, presentationData: PresentationData) {
self.isSelected = isSelected
self.titleNode.attributedText = NSAttributedString(string: title, font: Font.medium(14.0), textColor: isSelected ? presentationData.theme.list.itemAccentColor : presentationData.theme.list.itemSecondaryTextColor)
self.buttonNode.accessibilityLabel = title
self.buttonNode.accessibilityTraits = [.button]
if isSelected {
self.buttonNode.accessibilityTraits.insert(.selected)
}
}
func updateLayout(height: CGFloat) -> CGFloat {
let titleSize = self.titleNode.updateLayout(CGSize(width: 200.0, height: .greatestFiniteMagnitude))
self.titleNode.frame = CGRect(origin: CGPoint(x: 0.0, y: floor((height - titleSize.height) / 2.0)), size: titleSize)
return titleSize.width
}
func updateArea(size: CGSize, sideInset: CGFloat) {
self.buttonNode.frame = CGRect(origin: CGPoint(x: -sideInset, y: 0.0), size: CGSize(width: size.width + sideInset * 2.0, height: size.height))
}
class PeerInfoPaneTabsContainerNode
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private let scrollNode: ASScrollNode
private var paneNodes: [PeerInfoPaneKey: PeerInfoPaneTabsContainerPaneNode] = [:]
private let selectedLineNode: ASImageNode
private var currentParams: ([PeerInfoPaneSpecifier], PeerInfoPaneKey?, PresentationData)?
var requestSelectPane: ((PeerInfoPaneKey) -> Void)?
override init() {
self.scrollNode = ASScrollNode()
self.selectedLineNode = ASImageNode()
self.selectedLineNode.displaysAsynchronously = false
self.selectedLineNode.displayWithoutProcessing = true
super.init()
self.scrollNode.view.disablesInteractiveTransitionGestureRecognizerNow = { [weak self] in
guard let strongSelf = self else {
return false
}
return strongSelf.scrollNode.view.contentOffset.x > .ulpOfOne
}
self.scrollNode.view.showsHorizontalScrollIndicator = false
self.scrollNode.view.scrollsToTop = false
if #available(iOS 11.0, *) {
self.scrollNode.view.contentInsetAdjustmentBehavior = .never
}
self.addSubnode(self.scrollNode)
self.scrollNode.addSubnode(self.selectedLineNode)
}
func update(size: CGSize, presentationData: PresentationData, paneList: [PeerInfoPaneSpecifier], selectedPane: PeerInfoPaneKey?, transitionFraction: CGFloat, transition: ContainedViewLayoutTransition) {
transition.updateFrame(node: self.scrollNode, frame: CGRect(origin: CGPoint(), size: size))
let focusOnSelectedPane = self.currentParams?.1 != selectedPane
if self.currentParams?.2.theme !== presentationData.theme {
// generate selectedLine image
self.selectedLineNode.image = generateImage(CGSize(width: 7.0, height: 4.0), rotatedContext: { size, context in
context.clear(CGRect(origin: CGPoint(), size: size))
context.setFillColor(presentationData.theme.list.itemAccentColor.cgColor)
context.fillEllipse(in: CGRect(origin: CGPoint(), size: CGSize(width: size.width, height: size.width)))
})?.stretchableImage(withLeftCapWidth: 4, topCapHeight: 1)
}
if self.currentParams?.0 != paneList || self.currentParams?.1 != selectedPane || self.currentParams?.2 !== presentationData {
self.currentParams = (paneList, selectedPane, presentationData)
// update tabs
for specifier in paneList {
let paneNode: PeerInfoPaneTabsContainerPaneNode
if let current = self.paneNodes[specifier.key] {
paneNode = current
} else {
paneNode = PeerInfoPaneTabsContainerPaneNode(pressed: { [weak self] in
self?.paneSelected(specifier.key)
})
self.paneNodes[specifier.key] = paneNode
}
paneNode.updateText(specifier.title, isSelected: selectedPane == specifier.key, presentationData: presentationData)
}
// remove tabs
var removeKeys: [PeerInfoPaneKey] = []
for (key, _) in self.paneNodes {
if !paneList.contains(where: { $0.key == key }) {
removeKeys.append(key)
}
}
for key in removeKeys {
if let paneNode = self.paneNodes.removeValue(forKey: key) {
paneNode.removeFromSupernode()
}
}
}
// collecting layout info
var tabSizes: [(CGSize, PeerInfoPaneTabsContainerPaneNode, Bool)] = []
var totalRawTabSize: CGFloat = 0.0
var selectionFrames: [CGRect] = []
for specifier in paneList {
guard let paneNode = self.paneNodes[specifier.key] else {
continue
}
let wasAdded = paneNode.supernode == nil
if wasAdded {
self.scrollNode.addSubnode(paneNode)
}
let paneNodeWidth = paneNode.updateLayout(height: size.height)
let paneNodeSize = CGSize(width: paneNodeWidth, height: size.height)
tabSizes.append((paneNodeSize, paneNode, wasAdded))
totalRawTabSize += paneNodeSize.width
}
let minSpacing: CGFloat = 26.0
// layout
if tabSizes.count <= 1 {
for i in 0 ..< tabSizes.count {
let (paneNodeSize, paneNode, wasAdded) = tabSizes[i]
let leftOffset: CGFloat = 16.0
let paneFrame = CGRect(origin: CGPoint(x: leftOffset, y: floor((size.height - paneNodeSize.height) / 2.0)), size: paneNodeSize)
if wasAdded {// animate alpha in
paneNode.frame = paneFrame
paneNode.alpha = 0.0
transition.updateAlpha(node: paneNode, alpha: 1.0)
} else {// animate frame
transition.updateFrameAdditiveToCenter(node: paneNode, frame: paneFrame)
}
// update interactive area
let areaSideInset: CGFloat = 16.0
paneNode.updateArea(size: paneFrame.size, sideInset: areaSideInset)
paneNode.hitTestSlop = UIEdgeInsets(top: 0.0, left: -areaSideInset, bottom: 0.0, right: -areaSideInset)
selectionFrames.append(paneFrame)
}
self.scrollNode.view.contentSize = CGSize(width: size.width, height: size.height)
} else if totalRawTabSize + CGFloat(tabSizes.count + 1) * minSpacing <= size.width {
// calcuate tab spacing
let availableSpace = size.width
let availableSpacing = availableSpace - totalRawTabSize
let perTabSpacing = floor(availableSpacing / CGFloat(tabSizes.count + 1))
let normalizedPerTabWidth = floor(availableSpace / CGFloat(tabSizes.count))
var maxSpacing: CGFloat = 0.0
var minSpacing: CGFloat = .greatestFiniteMagnitude
for i in 0 ..< tabSizes.count - 1 {
let distanceToNextBoundary = (normalizedPerTabWidth - tabSizes[i].0.width) / 2.0
let nextDistanceToBoundary = (normalizedPerTabWidth - tabSizes[i + 1].0.width) / 2.0
let distance = nextDistanceToBoundary + distanceToNextBoundary
maxSpacing = max(distance, maxSpacing)
minSpacing = min(distance, minSpacing)
}
if minSpacing >= 100.0 || (maxSpacing / minSpacing) < 0.2 {
for i in 0 ..< tabSizes.count {
let (paneNodeSize, paneNode, wasAdded) = tabSizes[i]
let paneFrame = CGRect(origin: CGPoint(x: CGFloat(i) * normalizedPerTabWidth + floor((normalizedPerTabWidth - paneNodeSize.width) / 2.0), y: floor((size.height - paneNodeSize.height) / 2.0)), size: paneNodeSize)
if wasAdded {
paneNode.frame = paneFrame
paneNode.alpha = 0.0
transition.updateAlpha(node: paneNode, alpha: 1.0)
} else {
transition.updateFrameAdditiveToCenter(node: paneNode, frame: paneFrame)
}
let areaSideInset = floor((normalizedPerTabWidth - paneNodeSize.width) / 2.0)
paneNode.updateArea(size: paneFrame.size, sideInset: areaSideInset)
paneNode.hitTestSlop = UIEdgeInsets(top: 0.0, left: -areaSideInset, bottom: 0.0, right: -areaSideInset)
selectionFrames.append(paneFrame)
}
} else {
var leftOffset = perTabSpacing
for i in 0 ..< tabSizes.count {
let (paneNodeSize, paneNode, wasAdded) = tabSizes[i]
let paneFrame = CGRect(origin: CGPoint(x: leftOffset, y: floor((size.height - paneNodeSize.height) / 2.0)), size: paneNodeSize)
if wasAdded {
paneNode.frame = paneFrame
paneNode.alpha = 0.0
transition.updateAlpha(node: paneNode, alpha: 1.0)
} else {
transition.updateFrameAdditiveToCenter(node: paneNode, frame: paneFrame)
}
let areaSideInset = floor(perTabSpacing / 2.0)
paneNode.updateArea(size: paneFrame.size, sideInset: areaSideInset)
paneNode.hitTestSlop = UIEdgeInsets(top: 0.0, left: -areaSideInset, bottom: 0.0, right: -areaSideInset)
leftOffset += paneNodeSize.width + perTabSpacing
selectionFrames.append(paneFrame)
}
}
self.scrollNode.view.contentSize = CGSize(width: size.width, height: size.height)
} else {
let sideInset: CGFloat = 16.0
var leftOffset: CGFloat = sideInset
for i in 0 ..< tabSizes.count {
let (paneNodeSize, paneNode, wasAdded) = tabSizes[i]
let paneFrame = CGRect(origin: CGPoint(x: leftOffset, y: floor((size.height - paneNodeSize.height) / 2.0)), size: paneNodeSize)
if wasAdded {
paneNode.frame = paneFrame
paneNode.alpha = 0.0
transition.updateAlpha(node: paneNode, alpha: 1.0)
} else {
transition.updateFrameAdditiveToCenter(node: paneNode, frame: paneFrame)
}
paneNode.updateArea(size: paneFrame.size, sideInset: minSpacing)
paneNode.hitTestSlop = UIEdgeInsets(top: 0.0, left: -minSpacing, bottom: 0.0, right: -minSpacing)
selectionFrames.append(paneFrame)
leftOffset += paneNodeSize.width + minSpacing
}
self.scrollNode.view.contentSize = CGSize(width: leftOffset - minSpacing + sideInset, height: size.height)
}
var selectedFrame: CGRect?
if let selectedPane = selectedPane, let currentIndex = paneList.firstIndex(where: { $0.key == selectedPane }) {
if currentIndex != 0 && transitionFraction > 0.0 {
let currentFrame = selectionFrames[currentIndex]
let previousFrame = selectionFrames[currentIndex - 1]
selectedFrame = interpolateFrame(from: currentFrame, to: previousFrame, t: abs(transitionFraction))
} else if currentIndex != paneList.count - 1 && transitionFraction < 0.0 {
let currentFrame = selectionFrames[currentIndex]
let previousFrame = selectionFrames[currentIndex + 1]
selectedFrame = interpolateFrame(from: currentFrame, to: previousFrame, t: abs(transitionFraction))
} else {
selectedFrame = selectionFrames[currentIndex]
}
}
if let selectedFrame = selectedFrame {
let wasAdded = self.selectedLineNode.isHidden
self.selectedLineNode.isHidden = false
let lineFrame = CGRect(origin: CGPoint(x: selectedFrame.minX, y: size.height - 4.0), size: CGSize(width: selectedFrame.width, height: 4.0))
if wasAdded {
self.selectedLineNode.frame = lineFrame
self.selectedLineNode.alpha = 0.0
transition.updateAlpha(node: self.selectedLineNode, alpha: 1.0)
} else {
transition.updateFrame(node: self.selectedLineNode, frame: lineFrame)
}
if focusOnSelectedPane {
if selectedPane == paneList.first?.key {
transition.updateBounds(node: self.scrollNode, bounds: CGRect(origin: CGPoint(), size: self.scrollNode.bounds.size))
} else if selectedPane == paneList.last?.key {
transition.updateBounds(node: self.scrollNode, bounds: CGRect(origin: CGPoint(x: max(0.0, self.scrollNode.view.contentSize.width - self.scrollNode.bounds.width), y: 0.0), size: self.scrollNode.bounds.size))
} else {
let contentOffsetX = max(0.0, min(self.scrollNode.view.contentSize.width - self.scrollNode.bounds.width, floor(selectedFrame.midX - self.scrollNode.bounds.width / 2.0)))
transition.updateBounds(node: self.scrollNode, bounds: CGRect(origin: CGPoint(x: contentOffsetX, y: 0.0), size: self.scrollNode.bounds.size))
}
}
} else {
self.selectedLineNode.isHidden = true
}
}