1 files changed, 107 insertions, 0 deletions
diff --git a/packages/taler-wallet-webextension/src/components/Amount.tsx b/packages/taler-wallet-webextension/src/components/Amount.tsx
new file mode 100644
index 000000000..09f65473c
--- /dev/null
+++ b/packages/taler-wallet-webextension/src/components/Amount.tsx
@@ -0,0 +1,107 @@
+/*
+ This file is part of GNU Taler
+ (C) 2022 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+import {
+  amountFractionalBase,
+  amountFractionalLength,
+  AmountJson,
+  Amounts,
+  AmountString,
+} from "@gnu-taler/taler-util";
+import { Fragment, h, VNode } from "preact";
+
+export function Amount({
+  value,
+  maxFracSize,
+  negative,
+  hideCurrency,
+  signType = "standard",
+  signDisplay = "auto",
+}: {
+  negative?: boolean;
+  value: AmountJson | AmountString;
+  maxFracSize?: number;
+  hideCurrency?: boolean;
+  signType?: "accounting" | "standard";
+  signDisplay?: "auto" | "always" | "never" | "exceptZero";
+}): VNode {
+  const aj = Amounts.jsonifyAmount(value);
+  const minFractional =
+    maxFracSize !== undefined && maxFracSize < 2 ? maxFracSize : 2;
+  const af = aj.fraction % amountFractionalBase;
+  let s = "";
+  if ((af && maxFracSize) || minFractional > 0) {
+    s += ".";
+    let n = af;
+    for (
+      let i = 0;
+      (maxFracSize === undefined || i < maxFracSize) &&
+      i < amountFractionalLength;
+      i++
+    ) {
+      if (!n && i >= minFractional) {
+        break;
+      }
+      s = s + Math.floor((n / amountFractionalBase) * 10).toString();
+      n = (n * 10) % amountFractionalBase;
+    }
+  }
+  const fontSize = 18;
+  const letterSpacing = 0;
+  const mult = 0.7;
+  return (
+    <span style={{ textAlign: "right", whiteSpace: "nowrap" }}>
+      <span
+        style={{
+          display: "inline-block",
+          fontFamily: "monospace",
+          fontSize,
+        }}
+      >
+        {negative ? (signType === "accounting" ? "(" : "-") : ""}
+        <span
+          style={{
+            display: "inline-block",
+            textAlign: "right",
+            fontFamily: "monospace",
+            fontSize,
+            letterSpacing,
+          }}
+        >
+          {aj.value}
+        </span>
+        <span
+          style={{
+            display: "inline-block",
+            width: !maxFracSize ? undefined : `${(maxFracSize + 1) * mult}em`,
+            textAlign: "left",
+            fontFamily: "monospace",
+            fontSize,
+            letterSpacing,
+          }}
+        >
+          {s}
+          {negative && signType === "accounting" ? ")" : ""}
+        </span>
+      </span>
+      {hideCurrency ? undefined : (
+        <Fragment>
+          &nbsp;
+          <span>{aj.currency}</span>
+        </Fragment>
+      )}
+    </span>
+  );
+}