taler-ios

commit d02a14e2289465d8fd5c14cff89c272005ef4a96
parent 2b0249b5aa353c8a58e34f7abc35edc8d1abfbaa
Author: Marc Stibane <marc@taler.net>
Date:   Sun, 12 Nov 2023 13:16:36 +0100

DD51 Currency rendering

Diffstat:
M
TalerWallet1/Helper/CurrencySpecification.swift
 | 
22
+++++++++++++++++++++-
M
taler-swift/Sources/taler-swift/Amount.swift
 | 
6
+++++-

2 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/TalerWallet1/Helper/CurrencySpecification.swift b/TalerWallet1/Helper/CurrencySpecification.swift
@@ -8,11 +8,31 @@ import taler_swift
 extension Amount {
     func string(_ currencyInfo: CurrencyInfo?) -> String {
         if let currencyInfo {
-            return currencyInfo.string(for: valueAsTuple)
+            return currencyInfo.string(for: valueAsFloatTuple)
         } else {
             return valueStr
         }
     }
+
+    func inputDigits(_ currencyInfo: CurrencyInfo) -> UInt {
+        let inputDigits = currencyInfo.specs.fractionalInputDigits
+        if inputDigits < 0 { return 0 }
+        if inputDigits > 8 { return 8}
+        return UInt(inputDigits)
+    }
+
+    func addDigit(_ digit: UInt8, currencyInfo: CurrencyInfo) {
+        shiftLeft(add: digit, inputDigits(currencyInfo))
+    }
+
+    func removeDigit(_ currencyInfo: CurrencyInfo) {
+        shiftRight()                        // divide by 10
+        mask(inputDigits(currencyInfo))     // replace all digits after #inputDigit with 0
+    }
+
+    func plainString(_ currencyInfo: CurrencyInfo) -> String {
+        return plainString(inputDigits: inputDigits(currencyInfo))
+    }
 }
 
 public struct CurrencyInfo {
diff --git a/taler-swift/Sources/taler-swift/Amount.swift b/taler-swift/Sources/taler-swift/Amount.swift
@@ -113,7 +113,11 @@ public final class Amount: Codable, Hashable, @unchecked Sendable, CustomStringC
     }
 
     /// The tuple representation of the value.
-    public var valueAsTuple: (Double, Double) {
+    public var valueAsDecimalTuple: (UInt64, UInt32) {
+        (integer, fraction)
+    }
+    /// The tuple representation of the value.
+    public var valueAsFloatTuple: (Double, Double) {
         (intValue, fracValue)
     }