From f3d9c77544119898cccaa5f843a1fe1e1f72053d Mon Sep 17 00:00:00 2001
From: Hao Liu <liuhao.x64@gmail.com>
Date: Fri, 13 Dec 2024 22:42:47 +0800
Subject: [PATCH] Infer the default currency based on the user's locale when
 creating a new portfolio file

Issue: #4395
---
 .../ui/wizards/client/BaseCurrencySelectionPage.java | 12 ++++++------
 .../name/abuchen/portfolio/money/CurrencyUnit.java   | 10 ++++++++++
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/wizards/client/BaseCurrencySelectionPage.java b/name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/wizards/client/BaseCurrencySelectionPage.java
index 8c1cfee185..982943202a 100644
--- a/name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/wizards/client/BaseCurrencySelectionPage.java
+++ b/name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/wizards/client/BaseCurrencySelectionPage.java
@@ -3,11 +3,6 @@
 import java.util.Collections;
 import java.util.List;
 
-import name.abuchen.portfolio.money.CurrencyUnit;
-import name.abuchen.portfolio.ui.Messages;
-import name.abuchen.portfolio.ui.util.FormDataFactory;
-import name.abuchen.portfolio.ui.wizards.AbstractWizardPage;
-
 import org.eclipse.jface.viewers.ArrayContentProvider;
 import org.eclipse.jface.viewers.ComboViewer;
 import org.eclipse.jface.viewers.IStructuredSelection;
@@ -17,6 +12,10 @@
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Label;
 
+import name.abuchen.portfolio.money.CurrencyUnit;
+import name.abuchen.portfolio.ui.Messages;
+import name.abuchen.portfolio.ui.util.FormDataFactory;
+import name.abuchen.portfolio.ui.wizards.AbstractWizardPage;
 class BaseCurrencySelectionPage extends AbstractWizardPage
 {
     private ComboViewer combo;
@@ -41,12 +40,13 @@ public void createControl(Composite parent)
         Label label = new Label(container, SWT.NONE);
         label.setText(Messages.ColumnCurrency);
 
+
         List<CurrencyUnit> currencies = CurrencyUnit.getAvailableCurrencyUnits();
         Collections.sort(currencies);
         combo = new ComboViewer(container);
         combo.setContentProvider(ArrayContentProvider.getInstance());
         combo.setInput(currencies);
-        combo.setSelection(new StructuredSelection(CurrencyUnit.getInstance(CurrencyUnit.EUR)));
+        combo.setSelection(new StructuredSelection(CurrencyUnit.getDefaultInstance()));
 
         Label description = new Label(container, SWT.WRAP);
         description.setText(this.explanationIndividualCurrency);
diff --git a/name.abuchen.portfolio/src/name/abuchen/portfolio/money/CurrencyUnit.java b/name.abuchen.portfolio/src/name/abuchen/portfolio/money/CurrencyUnit.java
index ebb65165c0..109395adb4 100644
--- a/name.abuchen.portfolio/src/name/abuchen/portfolio/money/CurrencyUnit.java
+++ b/name.abuchen.portfolio/src/name/abuchen/portfolio/money/CurrencyUnit.java
@@ -6,6 +6,7 @@
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.MissingResourceException;
 import java.util.NavigableMap;
@@ -73,6 +74,15 @@ public static CurrencyUnit getInstance(String currencyCode)
         return CACHE.get(currencyCode);
     }
 
+    public static CurrencyUnit getDefaultInstance()
+    {
+        String defaultCurrencyISO4217 = java.util.Currency.getInstance(Locale.getDefault()).getCurrencyCode();
+        CurrencyUnit defaultCurrencyUnit = CurrencyUnit.getInstance(defaultCurrencyISO4217);
+        if (defaultCurrencyUnit != null)
+            return defaultCurrencyUnit;
+        return CurrencyUnit.getInstance(EUR);
+    }
+
     public static CurrencyUnit getInstanceBySymbol(String currencySymbol)
     {
         if (currencySymbol == null)