Implement SVG export

src/main/java/ovh/gasser/newshapes/App.java

@@ -15,7 +15,6 @@ import ovh.gasser.newshapes.ui.listeners.SelectionListener;
 import javax.swing.*;
 import java.awt.*;
 import java.io.FileNotFoundException;
-import java.util.Optional;
 
 public class App {
     private final static Logger logger = LoggerFactory.getLogger(App.class);
@@ -82,6 +81,7 @@ public class App {
         JMenuItem addRectItem = new JMenuItem("Add SRectangle");
         JMenuItem addCircleItem = new JMenuItem("Add SCircle");
         JMenuItem htmlExportItem = new JMenuItem("Export to HTML");
+        JMenuItem svgExportItem = new JMenuItem("Export to SVG");
         JMenuItem exitItem = new JMenuItem("Exit");
         addRectItem.addActionListener(new MenuAddListener("SRectangle", model, sview));
         addCircleItem.addActionListener(new MenuAddListener("SCircle", model, sview));
@@ -92,11 +92,19 @@ public class App {
                 logger.error("Could not export as html: {}", e.getMessage());
             }
         });
+        svgExportItem.addActionListener(evt -> {
+            try {
+                new SVGExporter(model).export();
+            } catch (FileNotFoundException e) {
+                logger.error("Could not export as html: {}", e.getMessage());
+            }
+        });
         exitItem.addActionListener(evt -> System.exit(0));
         menuFile.add(addRectItem);
         menuFile.add(addCircleItem);
         menuFile.addSeparator();
         menuFile.add(htmlExportItem);
+        menuFile.add(svgExportItem);
         menuFile.add(exitItem);
         return menuFile;
     }

src/main/java/ovh/gasser/newshapes/HTMLExporter.java

@@ -2,7 +2,7 @@ package ovh.gasser.newshapes;
 
 import ovh.gasser.newshapes.shapes.SCollection;
 import ovh.gasser.newshapes.shapes.SRectangle;
-import ovh.gasser.newshapes.ui.html.*;
+import ovh.gasser.newshapes.ui.visitors.*;
 
 import java.awt.*;
 import java.io.FileNotFoundException;
@@ -12,7 +12,7 @@ public class HTMLExporter {
 
     private final SCollection model;
 
-    private HTMLExporter() throws FileNotFoundException {
+    private HTMLExporter() {
         this(SCollection.of(
                 SRectangle.create(10, 10, 40, 60, Color.RED),
                 SRectangle.create(70, 10, 40, 60),

src/main/java/ovh/gasser/newshapes/SVGExporter.java

@@ -0,0 +1,36 @@
+package ovh.gasser.newshapes;
+
+import ovh.gasser.newshapes.attributes.ColorAttributes;
+import ovh.gasser.newshapes.shapes.SCircle;
+import ovh.gasser.newshapes.shapes.SCollection;
+import ovh.gasser.newshapes.ui.visitors.SVGDraftman;
+
+import java.awt.*;
+import java.io.FileNotFoundException;
+import java.io.PrintWriter;
+
+public class SVGExporter {
+
+    private final SCollection model;
+
+    public SVGExporter() {
+        SCircle circle = SCircle.create(200, 100, 50);
+        circle.addAttributes(new ColorAttributes(true, true, Color.LIGHT_GRAY,  Color.BLACK));
+        this.model = SCollection.of(circle);
+    }
+
+    public SVGExporter(SCollection model) {
+        this.model = model;
+    }
+
+    public void export() throws FileNotFoundException {
+        try (final PrintWriter svg = new PrintWriter("out.svg")) {
+            SVGDraftman draftman = new SVGDraftman(svg);
+            draftman.generateSVG(this.model);
+        }
+    }
+
+    public static void main(String[] args) throws FileNotFoundException {
+        new SVGExporter().export();
+    }
+}

src/main/java/ovh/gasser/newshapes/ui/visitors/HTMLDraftman.java

@@ -1,4 +1,4 @@
-package ovh.gasser.newshapes.ui.html;
+package ovh.gasser.newshapes.ui.visitors;
 
 import ovh.gasser.newshapes.ShapeVisitor;
 import ovh.gasser.newshapes.attributes.ColorAttributes;

src/main/java/ovh/gasser/newshapes/ui/visitors/SVGDraftman.java

@@ -0,0 +1,82 @@
+package ovh.gasser.newshapes.ui.visitors;
+
+import ovh.gasser.newshapes.App;
+import ovh.gasser.newshapes.ShapeVisitor;
+import ovh.gasser.newshapes.attributes.ColorAttributes;
+import ovh.gasser.newshapes.shapes.SCircle;
+import ovh.gasser.newshapes.shapes.SCollection;
+import ovh.gasser.newshapes.shapes.SRectangle;
+
+import java.awt.*;
+import java.io.PrintWriter;
+
+public class SVGDraftman implements ShapeVisitor {
+    private static final String SVG_PRELUDE = """
+            <?xml version="1.0" encoding="utf-8"?>
+            <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="%s" height="%s">
+            """;
+    private static final String SVG_POSTLUDE = "</svg>";
+
+    private final PrintWriter output;
+
+    public SVGDraftman(PrintWriter output) {
+        this.output = output;
+    }
+
+    @Override
+    public void visitRectangle(SRectangle sRectangle) {
+        int x = sRectangle.getBounds().x;
+        int y = sRectangle.getBounds().y;
+        int w = sRectangle.getBounds().width;
+        int h = sRectangle.getBounds().height;
+        ColorAttributes attrs = (ColorAttributes) sRectangle.getAttributes(ColorAttributes.ID);
+        this.output.println(String.format("""
+                        <rect width="%d" height="%d" x="%d" y="%d" %s />""",
+                        w, h, x, y, buildColorParameters(attrs)));
+    }
+
+    @Override
+    public void visitCollection(SCollection collection) {
+        collection.stream().forEach(shape -> shape.accept(this));
+    }
+
+    @Override
+    public void visitCircle(SCircle sCircle) {
+        int r = sCircle.getRadius();
+        int x = sCircle.getBounds().x + r;
+        int y = sCircle.getBounds().y + r;
+        var attrs = (ColorAttributes) sCircle.getAttributes(ColorAttributes.ID);
+        this.output.println(String.format("""
+                        <circle cx="%d" cy="%d" r="%d" %s />""",
+                        x, y, r, buildColorParameters(attrs)));
+    }
+
+    public void generateSVG(SCollection model) {
+        output.println(String.format(SVG_PRELUDE, App.WIN_SIZE.width, App.WIN_SIZE.height));
+        visitCollection(model);
+        output.println(SVG_POSTLUDE);
+    }
+
+    private String colorToHex(Color c) {
+        int r = c.getRed();
+        int g = c.getGreen();
+        int b = c.getBlue();
+        return String.format("#%02x%02x%02x", r, g, b);
+    }
+
+    private StringBuilder buildColorParameters(ColorAttributes attrs){
+        var params = new StringBuilder();
+        if (attrs.stroked) {
+            params.append(String.format("stroke=\"%s\" stroke-width=\"1\"", colorToHex(attrs.strokedColor)));
+            params.append(" ");
+        }
+        if (attrs.filled) {
+            params.append(String.format("fill=\"%s\"", colorToHex(attrs.filledColor)));
+            params.append(" ");
+        } else {
+            params.append(String.format("fill=\"%s\"", "none"));
+            params.append(" ");
+        }
+        return params;
+    }
+}