Introduce example for a more flexible deserialization

Also make the CoverGenerator themes serializeable
Rest is automatic reformatting.

VocaluxeLib/Xml/CXmlDeserializer.cs

@@ -0,0 +1,68 @@
+using System.Linq;
+
+namespace VocaluxeLib.Xml
+{
+    public abstract class CXmlDeserializer : CXmlReaderBase
+    {
+        public bool Read(string xPath, out SThemeFont el)
+        {
+            el = new SThemeFont();
+            bool ok = true;
+            ok &= GetValue(xPath + "/Name", out el.Name);
+            ok &= TryGetFloatValue(xPath + "/Size", ref el.Size);
+            ok &= TryGetEnumValue(xPath + "/Style", ref el.Style);
+            return ok;
+        }
+
+        public bool Read(string xPath, out SMargin el)
+        {
+            el = new SMargin();
+            bool ok = true;
+            bool defOk = TryGetIntValue(xPath + "/Default", ref el.Default);
+            ok &= TryGetIntValue(xPath + "/Left", ref el.Left, el.Default);
+            ok &= TryGetIntValue(xPath + "/Right", ref el.Right, el.Default);
+            ok &= TryGetIntValue(xPath + "/Top", ref el.Top, el.Default);
+            ok &= TryGetIntValue(xPath + "/Bottom", ref el.Bottom, el.Default);
+            return ok || defOk;
+        }
+
+        public bool Read(string xPath, out SThemeCoverGeneratorText el)
+        {
+            el = new SThemeCoverGeneratorText();
+            bool ok = true;
+            ok &= GetValue(xPath + "/Text", out el.Text);
+            ok &= Read(xPath + "/Font", out el.Font);
+            ok &= Read(xPath + "/Color", out el.Color);
+            ok &= Read(xPath + "/Margin", out el.Margin);
+            if (ok)
+                TryGetIntValue(xPath + "/Indent", ref el.Indent, 6 * (el.Margin.Left + el.Margin.Right) / 2);
+            return ok;
+        }
+
+        public bool Read(string xPath, out SThemeColor el)
+        {
+            el = new SThemeColor();
+            bool ok = true;
+            ok &= TryGetNormalizedFloatValue(xPath + "/R", ref el.Color.R);
+            ok &= TryGetNormalizedFloatValue(xPath + "/G", ref el.Color.G);
+            ok &= TryGetNormalizedFloatValue(xPath + "/B", ref el.Color.B);
+            ok &= TryGetNormalizedFloatValue(xPath + "/A", ref el.Color.A);
+            if (!ok)
+                ok = GetValue(xPath, out el.Name) && !el.Name.Contains('<');
+            return ok;
+        }
+
+        public bool Read(string xPath, out SThemeCoverGenerator el)
+        {
+            el = new SThemeCoverGenerator();
+            bool ok = true;
+            ok &= TryGetEnumValue(xPath + "/Type", ref el.Type);
+            ok &= Read(xPath + "/Text", out el.Text);
+            ok &= Read(xPath + "/BackgroundColor", out el.BackgroundColor);
+            ok &= GetValue(xPath + "/Image", out el.Image);
+            TryGetNormalizedFloatValue(xPath + "/ImageAlpha", ref el.ImageAlpha, 0.5f);
+            TryGetBoolValue(xPath + "/ShowFirstCover", out el.ShowFirstCover);
+            return ok;
+        }
+    }
+}