Swiftgram/submodules/TextSelectionNode/Sources/TextSelectionNode.swift
2022-08-02 04:57:19 +04:00

573 lines
26 KiB
Swift

import Foundation
import UIKit
import UIKit.UIGestureRecognizerSubclass
import AsyncDisplayKit
import Display
import TelegramPresentationData
import TextFormat
private extension CGRect {
var center: CGPoint {
return CGPoint(x: self.midX, y: self.midY)
}
}
private func findScrollView(view: UIView?) -> UIScrollView? {
if let view = view {
if let view = view as? UIScrollView {
return view
}
return findScrollView(view: view.superview)
} else {
return nil
}
}
private func cancelScrollViewGestures(view: UIView?) {
if let view = view {
if let gestureRecognizers = view.gestureRecognizers {
for recognizer in gestureRecognizers {
if let recognizer = recognizer as? UIPanGestureRecognizer {
switch recognizer.state {
case .began, .possible:
recognizer.state = .ended
default:
break
}
}
}
}
cancelScrollViewGestures(view: view.superview)
}
}
private func generateKnobImage(color: UIColor, diameter: CGFloat, inverted: Bool = false) -> UIImage? {
let f: (CGSize, CGContext) -> Void = { size, context in
context.clear(CGRect(origin: CGPoint(), size: size))
context.setFillColor(color.cgColor)
context.fill(CGRect(origin: CGPoint(x: (size.width - 2.0) / 2.0, y: size.width / 2.0), size: CGSize(width: 2.0, height: size.height - size.width / 2.0 - 1.0)))
context.fillEllipse(in: CGRect(origin: CGPoint(x: floor((size.width - diameter) / 2.0), y: floor((size.width - diameter) / 2.0)), size: CGSize(width: diameter, height: diameter)))
context.fillEllipse(in: CGRect(origin: CGPoint(x: (size.width - 2.0) / 2.0, y: size.width + 2.0), size: CGSize(width: 2.0, height: 2.0)))
}
let size = CGSize(width: 12.0, height: 12.0 + 2.0 + 2.0)
if inverted {
return generateImage(size, contextGenerator: f)?.stretchableImage(withLeftCapWidth: Int(size.width / 2.0), topCapHeight: Int(size.height) - (Int(size.width) + 1))
} else {
return generateImage(size, rotatedContext: f)?.stretchableImage(withLeftCapWidth: Int(size.width / 2.0), topCapHeight: Int(size.width) + 1)
}
}
public final class TextSelectionTheme {
public let selection: UIColor
public let knob: UIColor
public let knobDiameter: CGFloat
public init(selection: UIColor, knob: UIColor, knobDiameter: CGFloat = 12.0) {
self.selection = selection
self.knob = knob
self.knobDiameter = knobDiameter
}
}
private enum Knob {
case left
case right
}
private final class TextSelectionGestureRecognizer: UIGestureRecognizer, UIGestureRecognizerDelegate {
private var longTapTimer: Timer?
private var movingKnob: (Knob, CGPoint, CGPoint)?
private var currentLocation: CGPoint?
var beginSelection: ((CGPoint) -> Void)?
var knobAtPoint: ((CGPoint) -> (Knob, CGPoint)?)?
var moveKnob: ((Knob, CGPoint) -> Void)?
var finishedMovingKnob: (() -> Void)?
var clearSelection: (() -> Void)?
override init(target: Any?, action: Selector?) {
super.init(target: nil, action: nil)
self.delegate = self
}
override public func reset() {
super.reset()
self.longTapTimer?.invalidate()
self.longTapTimer = nil
self.movingKnob = nil
self.currentLocation = nil
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
super.touchesBegan(touches, with: event)
let currentLocation = touches.first?.location(in: self.view)
self.currentLocation = currentLocation
if let currentLocation = currentLocation {
if let (knob, knobPosition) = self.knobAtPoint?(currentLocation) {
self.movingKnob = (knob, knobPosition, currentLocation)
cancelScrollViewGestures(view: self.view?.superview)
self.state = .began
} else if self.longTapTimer == nil {
final class TimerTarget: NSObject {
let f: () -> Void
init(_ f: @escaping () -> Void) {
self.f = f
}
@objc func event() {
self.f()
}
}
let longTapTimer = Timer(timeInterval: 0.3, target: TimerTarget({ [weak self] in
self?.longTapEvent()
}), selector: #selector(TimerTarget.event), userInfo: nil, repeats: false)
self.longTapTimer = longTapTimer
RunLoop.main.add(longTapTimer, forMode: .common)
}
}
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent) {
super.touchesMoved(touches, with: event)
let currentLocation = touches.first?.location(in: self.view)
self.currentLocation = currentLocation
if let (knob, initialKnobPosition, initialGesturePosition) = self.movingKnob, let currentLocation = currentLocation {
self.moveKnob?(knob, CGPoint(x: initialKnobPosition.x + currentLocation.x - initialGesturePosition.x, y: initialKnobPosition.y + currentLocation.y - initialGesturePosition.y))
}
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent) {
super.touchesEnded(touches, with: event)
if let longTapTimer = self.longTapTimer {
self.longTapTimer = nil
longTapTimer.invalidate()
self.clearSelection?()
} else {
if let _ = self.currentLocation, let _ = self.movingKnob {
self.finishedMovingKnob?()
}
}
self.state = .ended
}
override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent) {
super.touchesCancelled(touches, with: event)
self.state = .cancelled
}
private func longTapEvent() {
if let currentLocation = self.currentLocation {
self.beginSelection?(currentLocation)
self.state = .ended
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
return true
}
@available(iOS 9.0, *)
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive press: UIPress) -> Bool {
return true
}
}
public final class TextSelectionNodeView: UIView {
var hitTestImpl: ((CGPoint, UIEvent?) -> UIView?)?
override public func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
return self.hitTestImpl?(point, event)
}
}
public enum TextSelectionAction {
case copy
case share
case lookup
case speak
case translate
}
public final class TextSelectionNode: ASDisplayNode {
private let theme: TextSelectionTheme
private let strings: PresentationStrings
private let textNode: TextNode
private let updateIsActive: (Bool) -> Void
public var updateRange: ((NSRange?) -> Void)?
private let present: (ViewController, Any?) -> Void
private weak var rootNode: ASDisplayNode?
private let performAction: (NSAttributedString, TextSelectionAction) -> Void
private var highlightOverlay: LinkHighlightingNode?
private let leftKnob: ASImageNode
private let rightKnob: ASImageNode
private var currentRange: (Int, Int)?
private var currentRects: [CGRect]?
public let highlightAreaNode: ASDisplayNode
private var recognizer: TextSelectionGestureRecognizer?
private var displayLinkAnimator: DisplayLinkAnimator?
public init(theme: TextSelectionTheme, strings: PresentationStrings, textNode: TextNode, updateIsActive: @escaping (Bool) -> Void, present: @escaping (ViewController, Any?) -> Void, rootNode: ASDisplayNode, performAction: @escaping (NSAttributedString, TextSelectionAction) -> Void) {
self.theme = theme
self.strings = strings
self.textNode = textNode
self.updateIsActive = updateIsActive
self.present = present
self.rootNode = rootNode
self.performAction = performAction
self.leftKnob = ASImageNode()
self.leftKnob.isUserInteractionEnabled = false
self.leftKnob.image = generateKnobImage(color: theme.knob, diameter: theme.knobDiameter)
self.leftKnob.displaysAsynchronously = false
self.leftKnob.displayWithoutProcessing = true
self.leftKnob.alpha = 0.0
self.rightKnob = ASImageNode()
self.rightKnob.isUserInteractionEnabled = false
self.rightKnob.image = generateKnobImage(color: theme.knob, diameter: theme.knobDiameter, inverted: true)
self.rightKnob.displaysAsynchronously = false
self.rightKnob.displayWithoutProcessing = true
self.rightKnob.alpha = 0.0
self.highlightAreaNode = ASDisplayNode()
super.init()
self.setViewBlock({
return TextSelectionNodeView()
})
self.addSubnode(self.leftKnob)
self.addSubnode(self.rightKnob)
}
override public func didLoad() {
super.didLoad()
(self.view as? TextSelectionNodeView)?.hitTestImpl = { [weak self] point, event in
return self?.hitTest(point, with: event)
}
let recognizer = TextSelectionGestureRecognizer(target: nil, action: nil)
recognizer.knobAtPoint = { [weak self] point in
return self?.knobAtPoint(point)
}
recognizer.moveKnob = { [weak self] knob, point in
guard let strongSelf = self, let cachedLayout = strongSelf.textNode.cachedLayout, let _ = cachedLayout.attributedString, let currentRange = strongSelf.currentRange else {
return
}
let mappedPoint = strongSelf.view.convert(point, to: strongSelf.textNode.view)
if let stringIndex = strongSelf.textNode.attributesAtPoint(mappedPoint, orNearest: true)?.0 {
var updatedLeft = currentRange.0
var updatedRight = currentRange.1
switch knob {
case .left:
updatedLeft = stringIndex
case .right:
updatedRight = stringIndex
}
if strongSelf.currentRange?.0 != updatedLeft || strongSelf.currentRange?.1 != updatedRight {
strongSelf.currentRange = (updatedLeft, updatedRight)
let updatedRange = NSRange(location: min(updatedLeft, updatedRight), length: max(updatedLeft, updatedRight) - min(updatedLeft, updatedRight))
strongSelf.updateSelection(range: updatedRange, animateIn: false)
}
if let scrollView = findScrollView(view: strongSelf.view) {
let scrollPoint = strongSelf.view.convert(point, to: scrollView)
scrollView.scrollRectToVisible(CGRect(origin: CGPoint(x: scrollPoint.x, y: scrollPoint.y - 30.0), size: CGSize(width: 1.0, height: 60.0)), animated: false)
}
}
}
recognizer.finishedMovingKnob = { [weak self] in
guard let strongSelf = self else {
return
}
strongSelf.displayMenu()
}
recognizer.beginSelection = { [weak self] point in
guard let strongSelf = self, let cachedLayout = strongSelf.textNode.cachedLayout, let attributedString = cachedLayout.attributedString else {
return
}
strongSelf.dismissSelection()
let mappedPoint = strongSelf.view.convert(point, to: strongSelf.textNode.view)
var resultRange: NSRange?
if let stringIndex = strongSelf.textNode.attributesAtPoint(mappedPoint, orNearest: false)?.0 {
let string = attributedString.string as NSString
let inputRange = CFRangeMake(0, string.length)
let flag = UInt(kCFStringTokenizerUnitWord)
let locale = CFLocaleCopyCurrent()
let tokenizer = CFStringTokenizerCreate(kCFAllocatorDefault, string as CFString, inputRange, flag, locale)
var tokenType = CFStringTokenizerAdvanceToNextToken(tokenizer)
while !tokenType.isEmpty {
let currentTokenRange = CFStringTokenizerGetCurrentTokenRange(tokenizer)
if currentTokenRange.location <= stringIndex && currentTokenRange.location + currentTokenRange.length > stringIndex {
resultRange = NSRange(location: currentTokenRange.location, length: currentTokenRange.length)
break
}
tokenType = CFStringTokenizerAdvanceToNextToken(tokenizer)
}
if resultRange == nil {
resultRange = NSRange(location: stringIndex, length: 1)
}
}
strongSelf.currentRange = resultRange.flatMap {
($0.lowerBound, $0.upperBound)
}
strongSelf.updateSelection(range: resultRange, animateIn: true)
strongSelf.displayMenu()
strongSelf.updateIsActive(true)
}
recognizer.clearSelection = { [weak self] in
self?.dismissSelection()
self?.updateIsActive(false)
}
self.recognizer = recognizer
self.view.addGestureRecognizer(recognizer)
}
public func updateLayout() {
if let currentRange = self.currentRange {
let updatedMin = currentRange.0
let updatedMax = currentRange.1
let updatedRange = NSRange(location: min(updatedMin, updatedMax), length: max(updatedMin, updatedMax) - min(updatedMin, updatedMax))
self.updateSelection(range: updatedRange, animateIn: false)
}
}
public func pretendInitiateSelection() {
guard let cachedLayout = self.textNode.cachedLayout, let attributedString = cachedLayout.attributedString else {
return
}
var resultRange: NSRange?
let stringIndex = 0
let string = attributedString.string as NSString
let inputRange = CFRangeMake(0, string.length)
let flag = UInt(kCFStringTokenizerUnitWord)
let locale = CFLocaleCopyCurrent()
let tokenizer = CFStringTokenizerCreate(kCFAllocatorDefault, string as CFString, inputRange, flag, locale)
var tokenType = CFStringTokenizerAdvanceToNextToken(tokenizer)
while !tokenType.isEmpty {
let currentTokenRange = CFStringTokenizerGetCurrentTokenRange(tokenizer)
if currentTokenRange.location <= stringIndex && currentTokenRange.location + currentTokenRange.length > stringIndex {
resultRange = NSRange(location: currentTokenRange.location, length: currentTokenRange.length)
break
}
tokenType = CFStringTokenizerAdvanceToNextToken(tokenizer)
}
if resultRange == nil {
resultRange = NSRange(location: stringIndex, length: 1)
}
self.currentRange = resultRange.flatMap {
($0.lowerBound, $0.upperBound)
}
self.updateSelection(range: resultRange, animateIn: true)
self.updateIsActive(true)
}
public func pretendExtendSelection(to index: Int) {
guard let cachedLayout = self.textNode.cachedLayout, let _ = cachedLayout.attributedString, let endRangeRect = cachedLayout.rangeRects(in: NSRange(location: index, length: 1))?.rects.first else {
return
}
let startPoint = self.rightKnob.frame.center
let endPoint = endRangeRect.center
let displayLinkAnimator = DisplayLinkAnimator(duration: 0.3, from: 0.0, to: 1.0, update: { [weak self] progress in
guard let strongSelf = self else {
return
}
let point = CGPoint(x: (1.0 - progress) * startPoint.x + progress * endPoint.x, y: (1.0 - progress) * startPoint.y + progress * endPoint.y)
strongSelf.recognizer?.moveKnob?(.right, point)
}, completion: {
})
self.displayLinkAnimator = displayLinkAnimator
}
private func updateSelection(range: NSRange?, animateIn: Bool) {
self.updateRange?(range)
var rects: (rects: [CGRect], start: TextRangeRectEdge, end: TextRangeRectEdge)?
if let range = range {
rects = self.textNode.rangeRects(in: range)
}
self.currentRects = rects?.rects
if let (rects, startEdge, endEdge) = rects, !rects.isEmpty {
let highlightOverlay: LinkHighlightingNode
if let current = self.highlightOverlay {
highlightOverlay = current
} else {
highlightOverlay = LinkHighlightingNode(color: self.theme.selection)
highlightOverlay.isUserInteractionEnabled = false
highlightOverlay.innerRadius = 0.0
highlightOverlay.outerRadius = 0.0
highlightOverlay.inset = 1.0
self.highlightOverlay = highlightOverlay
self.highlightAreaNode.addSubnode(highlightOverlay)
}
highlightOverlay.frame = self.bounds
highlightOverlay.updateRects(rects)
if let image = self.leftKnob.image {
self.leftKnob.frame = CGRect(origin: CGPoint(x: floor(startEdge.x - image.size.width / 2.0), y: startEdge.y + 1.0 - 12.0), size: CGSize(width: image.size.width, height: self.theme.knobDiameter + startEdge.height + 2.0))
self.rightKnob.frame = CGRect(origin: CGPoint(x: floor(endEdge.x + 1.0 - image.size.width / 2.0), y: endEdge.y + endEdge.height + 3.0 - (endEdge.height + 2.0)), size: CGSize(width: image.size.width, height: self.theme.knobDiameter + endEdge.height + 2.0))
}
if self.leftKnob.alpha.isZero {
highlightOverlay.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.3, timingFunction: CAMediaTimingFunctionName.easeOut.rawValue)
self.leftKnob.alpha = 1.0
self.leftKnob.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.14, delay: 0.19)
self.rightKnob.alpha = 1.0
self.rightKnob.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.14, delay: 0.19)
self.leftKnob.layer.animateSpring(from: 0.5 as NSNumber, to: 1.0 as NSNumber, keyPath: "transform.scale", duration: 0.2, delay: 0.25, initialVelocity: 0.0, damping: 80.0)
self.rightKnob.layer.animateSpring(from: 0.5 as NSNumber, to: 1.0 as NSNumber, keyPath: "transform.scale", duration: 0.2, delay: 0.25, initialVelocity: 0.0, damping: 80.0)
if animateIn {
var result = CGRect()
for rect in rects {
if result.isEmpty {
result = rect
} else {
result = result.union(rect)
}
}
highlightOverlay.layer.animateScale(from: 2.0, to: 1.0, duration: 0.26)
let fromResult = CGRect(origin: CGPoint(x: result.minX - result.width / 2.0, y: result.minY - result.height / 2.0), size: CGSize(width: result.width * 2.0, height: result.height * 2.0))
highlightOverlay.layer.animatePosition(from: CGPoint(x: (-fromResult.midX + highlightOverlay.bounds.midX) / 1.0, y: (-fromResult.midY + highlightOverlay.bounds.midY) / 1.0), to: CGPoint(), duration: 0.26, additive: true)
}
}
} else if let highlightOverlay = self.highlightOverlay {
self.highlightOverlay = nil
highlightOverlay.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.18, removeOnCompletion: false, completion: { [weak highlightOverlay] _ in
highlightOverlay?.removeFromSupernode()
})
self.leftKnob.layer.animateAlpha(from: 0.0, to: 1.0, duration: 0.18)
self.leftKnob.alpha = 0.0
self.leftKnob.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.18)
self.rightKnob.alpha = 0.0
self.rightKnob.layer.animateAlpha(from: 1.0, to: 0.0, duration: 0.18)
}
}
private func knobAtPoint(_ point: CGPoint) -> (Knob, CGPoint)? {
if !self.leftKnob.alpha.isZero, self.leftKnob.frame.insetBy(dx: -4.0, dy: -8.0).contains(point) {
return (.left, self.leftKnob.frame.offsetBy(dx: 0.0, dy: self.leftKnob.frame.width / 2.0).center)
}
if !self.rightKnob.alpha.isZero, self.rightKnob.frame.insetBy(dx: -4.0, dy: -8.0).contains(point) {
return (.right, self.rightKnob.frame.offsetBy(dx: 0.0, dy: -self.rightKnob.frame.width / 2.0).center)
}
if !self.leftKnob.alpha.isZero, self.leftKnob.frame.insetBy(dx: -14.0, dy: -14.0).contains(point) {
return (.left, self.leftKnob.frame.offsetBy(dx: 0.0, dy: self.leftKnob.frame.width / 2.0).center)
}
if !self.rightKnob.alpha.isZero, self.rightKnob.frame.insetBy(dx: -14.0, dy: -14.0).contains(point) {
return (.right, self.rightKnob.frame.offsetBy(dx: 0.0, dy: -self.rightKnob.frame.width / 2.0).center)
}
return nil
}
private func dismissSelection() {
self.currentRange = nil
self.updateSelection(range: nil, animateIn: false)
}
private func displayMenu() {
guard let currentRects = self.currentRects, !currentRects.isEmpty, let currentRange = self.currentRange, let cachedLayout = self.textNode.cachedLayout, let attributedString = cachedLayout.attributedString else {
return
}
let range = NSRange(location: min(currentRange.0, currentRange.1), length: max(currentRange.0, currentRange.1) - min(currentRange.0, currentRange.1))
var completeRect = currentRects[0]
for i in 0 ..< currentRects.count {
completeRect = completeRect.union(currentRects[i])
}
completeRect = completeRect.insetBy(dx: 0.0, dy: -12.0)
let string = NSMutableAttributedString(attributedString: attributedString.attributedSubstring(from: range))
var fullRange = NSRange(location: 0, length: string.length)
while true {
var found = false
string.enumerateAttribute(originalTextAttributeKey, in: fullRange, options: [], using: { value, range, stop in
if let value = value as? String {
let updatedSubstring = NSMutableAttributedString(string: value)
let replacementRange = NSRange(location: 0, length: updatedSubstring.length)
updatedSubstring.addAttributes(string.attributes(at: range.location, effectiveRange: nil), range: replacementRange)
string.replaceCharacters(in: range, with: updatedSubstring)
let updatedRange = NSRange(location: range.location, length: updatedSubstring.length)
found = true
stop.pointee = ObjCBool(true)
fullRange = NSRange(location: updatedRange.upperBound, length: fullRange.upperBound - range.upperBound)
}
})
if !found {
break
}
}
var actions: [ContextMenuAction] = []
actions.append(ContextMenuAction(content: .text(title: self.strings.Conversation_ContextMenuCopy, accessibilityLabel: self.strings.Conversation_ContextMenuCopy), action: { [weak self] in
self?.performAction(string, .copy)
self?.dismissSelection()
}))
actions.append(ContextMenuAction(content: .text(title: self.strings.Conversation_ContextMenuLookUp, accessibilityLabel: self.strings.Conversation_ContextMenuLookUp), action: { [weak self] in
self?.performAction(string, .lookup)
self?.dismissSelection()
}))
if #available(iOS 15.0, *) {
actions.append(ContextMenuAction(content: .text(title: self.strings.Conversation_ContextMenuTranslate, accessibilityLabel: self.strings.Conversation_ContextMenuTranslate), action: { [weak self] in
self?.performAction(string, .translate)
self?.dismissSelection()
}))
}
// if isSpeakSelectionEnabled() {
// actions.append(ContextMenuAction(content: .text(title: self.strings.Conversation_ContextMenuSpeak, accessibilityLabel: self.strings.Conversation_ContextMenuSpeak), action: { [weak self] in
// self?.performAction(attributedText, .speak)
// self?.dismissSelection()
// }))
// }
actions.append(ContextMenuAction(content: .text(title: self.strings.Conversation_ContextMenuShare, accessibilityLabel: self.strings.Conversation_ContextMenuShare), action: { [weak self] in
self?.performAction(string, .share)
self?.dismissSelection()
}))
self.present(ContextMenuController(actions: actions, catchTapsOutside: false, hasHapticFeedback: false), ContextMenuControllerPresentationArguments(sourceNodeAndRect: { [weak self] in
guard let strongSelf = self, let rootNode = strongSelf.rootNode else {
return nil
}
return (strongSelf, completeRect, rootNode, rootNode.bounds)
}, bounce: false))
}
override public func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
if self.knobAtPoint(point) != nil {
return self.view
}
if self.bounds.contains(point) {
return self.view
}
return nil
}
}