Introduces support for AWT's component

Fixes #76

Author: bric3

jsvg/src/main/java/com/github/weisj/jsvg/SVGDocument.java

@@ -27,6 +27,7 @@
 
 import javax.swing.*;
 
+import com.github.weisj.jsvg.renderer.awt.AwtComponentPlatformSupport;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -74,20 +75,29 @@ public void render(@Nullable JComponent component, @NotNull Graphics2D g) {
     }
 
     public void render(@Nullable JComponent component, @NotNull Graphics2D graphics2D, @Nullable ViewBox bounds) {
+        render(component, graphics2D, bounds);
+    }
+
+    public void render(@Nullable Component component, @NotNull Graphics2D graphics2D, @Nullable ViewBox bounds) {
         PlatformSupport platformSupport = component != null
-                ? new JComponentPlatformSupport(component)
+                ? new AwtComponentPlatformSupport(component)
                 : new NullPlatformSupport();
+        renderWithPlatform(platformSupport, graphics2D, bounds);
+    }
+
+    private float computePlatformFontSize(@NotNull PlatformSupport platformSupport, @NotNull Output output) {
+        return output.contextFontSize().orElseGet(platformSupport::fontSize);
+    }
+
+    public void renderWithPlatform(@NotNull PlatformSupport platformSupport, @NotNull Graphics2D graphics2D,
+                                   @Nullable ViewBox bounds) {
         Graphics2D g = (Graphics2D) graphics2D.create();
         setupSVGRenderingHints(g);
         Output output = new Graphics2DOutput(g);
         renderWithPlatform(platformSupport, output, bounds);
         output.dispose();
     }
 
-    private float computePlatformFontSize(@NotNull PlatformSupport platformSupport, @NotNull Output output) {
-        return output.contextFontSize().orElseGet(platformSupport::fontSize);
-    }
-
     public void renderWithPlatform(@NotNull PlatformSupport platformSupport, @NotNull Output output,
             @Nullable ViewBox bounds) {
         RenderContext context = prepareRenderContext(platformSupport, output, bounds);

jsvg/src/main/java/com/github/weisj/jsvg/renderer/awt/AwtComponentPlatformSupport.java

@@ -0,0 +1,49 @@
+package com.github.weisj.jsvg.renderer.awt;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.awt.*;
+import java.awt.image.ImageObserver;
+import java.awt.image.ImageProducer;
+
+public class AwtComponentPlatformSupport implements PlatformSupport {
+    protected final @NotNull Component component;
+
+    public AwtComponentPlatformSupport(@NotNull Component component) {
+        this.component = component;
+    }
+
+    @Override
+    public float fontSize() {
+        Font font = component.getFont();
+        if (font != null) return font.getSize2D();
+        return PlatformSupport.super.fontSize();
+    }
+
+    @Override
+    public @NotNull TargetSurface targetSurface() {
+        return component::repaint;
+    }
+
+    @Override
+    public boolean isLongLived() {
+        return true;
+    }
+
+    @Override
+    public @NotNull ImageObserver imageObserver() {
+        return component;
+    }
+
+    @Override
+    public @NotNull Image createImage(@NotNull ImageProducer imageProducer) {
+        return component.createImage(imageProducer);
+    }
+
+    @Override
+    public String toString() {
+        return "AwtComponentSupport{" +
+               "component=" + component +
+               '}';
+    }
+}

jsvg/src/main/java/com/github/weisj/jsvg/renderer/awt/JComponentPlatformSupport.java

@@ -29,39 +29,10 @@
 
 import org.jetbrains.annotations.NotNull;
 
-public final class JComponentPlatformSupport implements PlatformSupport {
-
-    private final @NotNull JComponent component;
+public final class JComponentPlatformSupport extends AwtComponentPlatformSupport {
 
     public JComponentPlatformSupport(@NotNull JComponent component) {
-        this.component = component;
-    }
-
-    @Override
-    public float fontSize() {
-        Font font = component.getFont();
-        if (font != null) return font.getSize2D();
-        return PlatformSupport.super.fontSize();
-    }
-
-    @Override
-    public @NotNull TargetSurface targetSurface() {
-        return component::repaint;
-    }
-
-    @Override
-    public boolean isLongLived() {
-        return true;
-    }
-
-    @Override
-    public @NotNull ImageObserver imageObserver() {
-        return component;
-    }
-
-    @Override
-    public @NotNull Image createImage(@NotNull ImageProducer imageProducer) {
-        return component.createImage(imageProducer);
+        super(component);
     }
 
     @Override