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Currency formatting
This commit is contained in:
Ali
parent
121b1b1bb4
commit
d0d03173f0
@ -155,6 +155,316 @@ private final class TipValueNode: ASDisplayNode {
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}
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}
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private final class FormatterImpl: NSObject, UITextFieldDelegate {
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private struct Representation {
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private let format: CurrencyFormat
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private var caretIndex: Int = 0
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private var wholePart: [Int] = []
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private var decimalPart: [Int] = []
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init(string: String, format: CurrencyFormat) {
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self.format = format
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var isDecimalPart = false
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for c in string {
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if c.isNumber {
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if let value = Int(String(c)) {
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if isDecimalPart {
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self.decimalPart.append(value)
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} else {
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self.wholePart.append(value)
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}
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}
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} else if String(c) == format.decimalSeparator {
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isDecimalPart = true
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}
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}
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while self.wholePart.count > 1 {
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if self.wholePart[0] != 0 {
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break
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} else {
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self.wholePart.removeFirst()
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}
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}
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if self.wholePart.isEmpty {
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self.wholePart = [0]
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}
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while self.decimalPart.count > 1 {
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if self.decimalPart[self.decimalPart.count - 1] != 0 {
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break
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} else {
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self.decimalPart.removeLast()
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}
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}
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while self.decimalPart.count < format.decimalDigits {
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self.decimalPart.append(0)
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}
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self.caretIndex = self.wholePart.count
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}
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var minCaretIndex: Int {
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for i in 0 ..< self.wholePart.count {
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if self.wholePart[i] != 0 {
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return i
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}
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}
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return self.wholePart.count
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}
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mutating func moveCaret(offset: Int) {
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self.caretIndex = max(self.minCaretIndex, min(self.caretIndex + offset, self.wholePart.count + self.decimalPart.count))
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}
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mutating func normalize() {
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while self.wholePart.count > 1 {
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if self.wholePart[0] != 0 {
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break
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} else {
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self.wholePart.removeFirst()
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self.moveCaret(offset: -1)
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}
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}
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if self.wholePart.isEmpty {
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self.wholePart = [0]
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}
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while self.decimalPart.count < format.decimalDigits {
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self.decimalPart.append(0)
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}
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while self.decimalPart.count > format.decimalDigits {
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self.decimalPart.removeLast()
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}
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self.caretIndex = max(self.minCaretIndex, min(self.caretIndex, self.wholePart.count + self.decimalPart.count))
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}
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mutating func backspace() {
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if self.caretIndex > self.wholePart.count {
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let decimalIndex = self.caretIndex - self.wholePart.count
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if decimalIndex > 0 {
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self.decimalPart.remove(at: decimalIndex - 1)
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self.moveCaret(offset: -1)
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self.normalize()
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}
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} else {
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if self.caretIndex > 0 {
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self.wholePart.remove(at: self.caretIndex - 1)
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self.moveCaret(offset: -1)
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self.normalize()
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}
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}
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}
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mutating func insert(letter: String) {
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if letter == "." || letter == "," {
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if self.caretIndex == self.wholePart.count {
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return
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} else if self.caretIndex < self.wholePart.count {
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for i in (self.caretIndex ..< self.wholePart.count).reversed() {
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self.decimalPart.insert(self.wholePart[i], at: 0)
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self.wholePart.remove(at: i)
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}
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}
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self.normalize()
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} else if letter.count == 1 && letter[letter.startIndex].isNumber {
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if let value = Int(letter) {
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if self.caretIndex <= self.wholePart.count {
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self.wholePart.insert(value, at: self.caretIndex)
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} else {
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let decimalIndex = self.caretIndex - self.wholePart.count
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self.decimalPart.insert(value, at: decimalIndex)
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}
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self.moveCaret(offset: 1)
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self.normalize()
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}
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}
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}
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var string: String {
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var result = ""
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for digit in self.wholePart {
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result.append("\(digit)")
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}
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result.append(self.format.decimalSeparator)
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for digit in self.decimalPart {
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result.append("\(digit)")
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}
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return result
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}
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var stringCaretIndex: Int {
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var logicalIndex = 0
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var resolvedIndex = 0
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if logicalIndex == self.caretIndex {
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return resolvedIndex
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}
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for _ in self.wholePart {
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logicalIndex += 1
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resolvedIndex += 1
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if logicalIndex == self.caretIndex {
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return resolvedIndex
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}
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}
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resolvedIndex += 1
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for _ in self.decimalPart {
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logicalIndex += 1
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resolvedIndex += 1
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if logicalIndex == self.caretIndex {
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return resolvedIndex
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}
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}
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return resolvedIndex
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}
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var numericalValue: Int64 {
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var result: Int64 = 0
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for digit in self.wholePart {
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result *= 10
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result += Int64(digit)
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}
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for digit in self.decimalPart {
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result *= 10
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result += Int64(digit)
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}
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return result
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}
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}
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private let format: CurrencyFormat
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private let currency: String
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private let maxNumericalValue: Int64
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private let updated: (Int64) -> Void
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private let focusUpdated: (Bool) -> Void
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private var representation: Representation
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private var previousResolvedCaretIndex: Int = 0
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private var ignoreTextSelection: Bool = false
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private var enableTextSelectionProcessing: Bool = false
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init?(textField: UITextField, currency: String, maxNumericalValue: Int64, initialValue: String, updated: @escaping (Int64) -> Void, focusUpdated: @escaping (Bool) -> Void) {
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guard let format = CurrencyFormat(currency: currency) else {
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return nil
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}
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self.format = format
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self.currency = currency
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self.maxNumericalValue = maxNumericalValue
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self.updated = updated
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self.focusUpdated = focusUpdated
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self.representation = Representation(string: initialValue, format: format)
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super.init()
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textField.text = self.representation.string
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self.previousResolvedCaretIndex = self.representation.stringCaretIndex
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}
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func reset(textField: UITextField, initialValue: String) {
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self.representation = Representation(string: initialValue, format: self.format)
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self.resetFromRepresentation(textField: textField, notifyUpdated: false)
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}
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private func resetFromRepresentation(textField: UITextField, notifyUpdated: Bool) {
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self.ignoreTextSelection = true
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if self.representation.numericalValue > self.maxNumericalValue {
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self.representation = Representation(string: formatCurrencyAmountCustom(self.maxNumericalValue, currency: self.currency).0, format: self.format)
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}
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textField.text = self.representation.string
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self.previousResolvedCaretIndex = self.representation.stringCaretIndex
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if self.enableTextSelectionProcessing {
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let stringCaretIndex = self.representation.stringCaretIndex
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if let caretPosition = textField.position(from: textField.beginningOfDocument, offset: stringCaretIndex) {
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textField.selectedTextRange = textField.textRange(from: caretPosition, to: caretPosition)
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}
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}
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self.ignoreTextSelection = false
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if notifyUpdated {
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self.updated(self.representation.numericalValue)
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}
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}
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@objc public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
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if string.count == 1 {
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self.representation.insert(letter: string)
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self.resetFromRepresentation(textField: textField, notifyUpdated: true)
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} else if string.count == 0 {
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self.representation.backspace()
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self.resetFromRepresentation(textField: textField, notifyUpdated: true)
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}
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return false
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}
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@objc public func textFieldShouldReturn(_ textField: UITextField) -> Bool {
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return false
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}
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@objc public func textFieldDidBeginEditing(_ textField: UITextField) {
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self.enableTextSelectionProcessing = true
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self.focusUpdated(true)
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let stringCaretIndex = self.representation.stringCaretIndex
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self.previousResolvedCaretIndex = stringCaretIndex
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if let caretPosition = textField.position(from: textField.beginningOfDocument, offset: stringCaretIndex) {
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self.ignoreTextSelection = true
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textField.selectedTextRange = textField.textRange(from: caretPosition, to: caretPosition)
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DispatchQueue.main.async {
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textField.selectedTextRange = textField.textRange(from: caretPosition, to: caretPosition)
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self.ignoreTextSelection = false
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}
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}
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}
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@objc public func textFieldDidChangeSelection(_ textField: UITextField) {
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if self.ignoreTextSelection {
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return
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}
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if !self.enableTextSelectionProcessing {
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return
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}
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if let selectedTextRange = textField.selectedTextRange {
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let index = textField.offset(from: textField.beginningOfDocument, to: selectedTextRange.end)
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if self.previousResolvedCaretIndex != index {
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self.representation.moveCaret(offset: self.previousResolvedCaretIndex < index ? 1 : -1)
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let stringCaretIndex = self.representation.stringCaretIndex
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self.previousResolvedCaretIndex = stringCaretIndex
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if let caretPosition = textField.position(from: textField.beginningOfDocument, offset: stringCaretIndex) {
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textField.selectedTextRange = textField.textRange(from: caretPosition, to: caretPosition)
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}
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}
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}
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}
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@objc public func textFieldDidEndEditing(_ textField: UITextField) {
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self.enableTextSelectionProcessing = false
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self.focusUpdated(false)
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}
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}
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class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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private let backgroundNode: ASDisplayNode
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let titleNode: TextNode
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@ -167,8 +477,7 @@ class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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private var valueNodes: [TipValueNode] = []
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private var item: BotCheckoutTipItem?
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private var formatterDelegate: CurrencyUITextFieldDelegate?
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private var formatter: FormatterImpl?
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init() {
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self.backgroundNode = ASDisplayNode()
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@ -178,6 +487,7 @@ class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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self.labelNode = TextNode()
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self.labelNode.isUserInteractionEnabled = false
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self.labelNode.isHidden = true
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self.tipMeasurementNode = ImmediateTextNode()
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self.tipCurrencyNode = ImmediateTextNode()
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@ -248,8 +558,25 @@ class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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strongSelf.titleNode.frame = CGRect(origin: CGPoint(x: leftInset, y: floor((labelsContentHeight - titleLayout.size.height) / 2.0)), size: titleLayout.size)
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strongSelf.labelNode.frame = CGRect(origin: CGPoint(x: params.width - leftInset - labelLayout.size.width, y: floor((labelsContentHeight - labelLayout.size.height) / 2.0)), size: labelLayout.size)
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if strongSelf.formatterDelegate == nil {
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strongSelf.formatterDelegate = CurrencyUITextFieldDelegate(formatter: CurrencyFormatter(currency: item.currency, { formatter in
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if strongSelf.formatter == nil {
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strongSelf.formatter = FormatterImpl(textField: strongSelf.textNode.textField, currency: item.currency, maxNumericalValue: item.maxValue, initialValue: item.value, updated: { value in
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guard let strongSelf = self, let item = strongSelf.item else {
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return
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}
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if item.numericValue != value {
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item.updateValue(value)
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}
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}, focusUpdated: { value in
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guard let strongSelf = self else {
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return
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}
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if value {
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strongSelf.item?.updatedFocus(true)
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}
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})
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strongSelf.textNode.textField.delegate = strongSelf.formatter
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/*strongSelf.formatterDelegate = CurrencyUITextFieldDelegate(formatter: CurrencyFormatter(currency: item.currency, { formatter in
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formatter.maxValue = currencyToFractionalAmount(value: item.maxValue, currency: item.currency) ?? 10000.0
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formatter.minValue = 0.0
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formatter.hasDecimals = true
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@ -263,20 +590,10 @@ class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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strongSelf.textFieldTextChanged(strongSelf.textNode.textField)
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}
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strongSelf.textNode.textField.delegate = strongSelf.formatterDelegate*/
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strongSelf.textNode.clipsToBounds = true
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strongSelf.textNode.textField.delegate = strongSelf.formatterDelegate
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/*let toolbar: UIToolbar = UIToolbar()
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toolbar.tintColor = item.theme.rootController.navigationBar.accentTextColor
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toolbar.barTintColor = item.theme.rootController.navigationBar.backgroundColor
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toolbar.barStyle = .default
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toolbar.items = [
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UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: self, action: nil),
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UIBarButtonItem(title: item.strings.Common_Done, style: .done, target: strongSelf, action: #selector(strongSelf.dismissKeyboard))
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]
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toolbar.sizeToFit()
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strongSelf.textNode.textField.inputAccessoryView = toolbar*/
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//strongSelf.textNode.textField.delegate = strongSelf
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}
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strongSelf.textNode.textField.typingAttributes = [NSAttributedString.Key.font: titleFont]
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@ -297,8 +614,7 @@ class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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//let currencySymbolOnTheLeft = true
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if strongSelf.textNode.textField.text ?? "" != currencyText.0 {
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strongSelf.textNode.textField.text = currencyText.0
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strongSelf.labelNode.isHidden = !currencyText.0.isEmpty
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strongSelf.formatter?.reset(textField: strongSelf.textNode.textField, initialValue: currencyText.0)
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}
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strongSelf.tipMeasurementNode.attributedText = NSAttributedString(string: currencyText.0, font: titleFont, textColor: textColor)
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@ -334,10 +650,14 @@ class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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}
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let (nodeMinWidth, nodeApply) = valueNode.update(theme: item.theme, text: variantText, isHighlighted: item.value == variantText, height: valueHeight)
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valueNode.action = {
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guard let strongSelf = self else {
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guard let strongSelf = self, let item = strongSelf.item else {
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return
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}
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strongSelf.item?.updateValue(variantValue)
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if item.numericValue == variantValue {
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item.updateValue(0)
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} else {
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item.updateValue(variantValue)
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}
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}
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totalMinWidth += nodeMinWidth
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variantLayouts.append((nodeMinWidth, nodeApply))
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@ -390,7 +710,7 @@ class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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@objc private func textFieldTextChanged(_ textField: UITextField) {
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let text = textField.text ?? ""
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self.labelNode.isHidden = !text.isEmpty
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//self.labelNode.isHidden = !text.isEmpty
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guard let item = self.item else {
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return
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@ -401,7 +721,7 @@ class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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return
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}
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var cleanText = ""
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/*var cleanText = ""
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for c in text {
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if c.isNumber {
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cleanText.append(c)
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@ -424,7 +744,7 @@ class BotCheckoutTipItemNode: ListViewItemNode, UITextFieldDelegate {
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}
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}
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item.updateValue(value)
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}
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}*/
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}
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@objc public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
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@ -209,3 +209,20 @@ public func formatCurrencyAmountCustom(_ amount: Int64, currency: String) -> (St
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return ("", "", false)
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}
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}
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public struct CurrencyFormat {
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public var symbol: String
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public var symbolOnLeft: Bool
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public var decimalSeparator: String
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public var decimalDigits: Int
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public init?(currency: String) {
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guard let entry = currencyFormatterEntries[currency] else {
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return nil
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}
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self.symbol = entry.symbol
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self.symbolOnLeft = entry.symbolOnLeft
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self.decimalSeparator = entry.decimalSeparator
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self.decimalDigits = entry.decimalDigits
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}
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}
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