Normalize color strings so they are always upper case for better readability of the theme files and the values in the editor

common/themes/theme_json_utils.cpp

@@ -0,0 +1,50 @@
+#include "theme_json_utils.h"
+
+#include <QJsonArray>
+#include <QJsonValue>
+#include <QRegularExpression>
+
+namespace {
+
+QJsonValue normalizeThemeJsonValue(const QJsonValue &value)
+{
+    if (value.isObject())
+        return normalizeThemeJson(value.toObject());
+
+    if (value.isArray()) {
+        QJsonArray normalizedArray = value.toArray();
+        for (int i = 0; i < normalizedArray.size(); ++i)
+            normalizedArray[i] = normalizeThemeJsonValue(normalizedArray.at(i));
+        return normalizedArray;
+    }
+
+    if (value.isString()) {
+        const QString stringValue = value.toString();
+        if (isThemeHexColorString(stringValue))
+            return stringValue.toUpper();
+    }
+
+    return value;
+}
+
+}
+
+bool isThemeHexColorString(const QString &value)
+{
+    static const QRegularExpression colorRegex(
+            "^#(?:[0-9A-Fa-f]{3}|[0-9A-Fa-f]{6}|[0-9A-Fa-f]{8})$");
+    return colorRegex.match(value).hasMatch();
+}
+
+QJsonObject normalizeThemeJson(const QJsonObject &json)
+{
+    QJsonObject normalized;
+    for (auto it = json.constBegin(); it != json.constEnd(); ++it)
+        normalized.insert(it.key(), normalizeThemeJsonValue(it.value()));
+    return normalized;
+}
+
+QByteArray serializeNormalizedThemeJson(const QJsonObject &json, QJsonDocument::JsonFormat format)
+{
+    return QJsonDocument(normalizeThemeJson(json)).toJson(format);
+}