add Pilz.UI & Pilz.UI.Gtk

Pilz.UI/Symbols/BaseSymbolFactory.cs

@@ -0,0 +1,29 @@
+using System.Drawing;
+using System.Reflection;
+
+namespace Pilz.UI.Symbols;
+
+public abstract class BaseSymbolFactory<TSymbols> : IBaseSymbolFactory<TSymbols>
+{
+    public abstract string GetImageRessourcePath(TSymbols svgImage);
+    public abstract Assembly GetImageResourceAssembly();
+
+    protected virtual Size ResolveCommonSize(SymbolSize size)
+    {
+        return size switch
+        {
+            SymbolSize.Default => Size.Empty,
+            SymbolSize.Small => new Size(16, 16),
+            SymbolSize.Medium => new Size(20, 20),
+            SymbolSize.Large => new Size(32, 32),
+            _ => new Size((int)size, (int)size),
+        };
+    }
+
+    public virtual Stream? GetImageRessourceStream(TSymbols svgImage)
+    {
+        var asm = GetImageResourceAssembly();
+        var path = GetImageRessourcePath(svgImage);
+        return asm.GetManifestResourceStream(path);
+    }
+}