1 files changed, 161 insertions, 0 deletions
diff --git a/src/main/java/com/kitfox/svg/RenderableElement.java b/src/main/java/com/kitfox/svg/RenderableElement.java
new file mode 100644
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--- /dev/null
+++ b/src/main/java/com/kitfox/svg/RenderableElement.java
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+/*
+ * BoundedElement.java
+ *
+ *
+ *  The Salamander Project - 2D and 3D graphics libraries in Java
+ *  Copyright (C) 2004 Mark McKay
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *  Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
+ *  projects can be found at http://www.kitfox.com
+ *
+ * Created on January 26, 2004, 9:00 AM
+ */
+
+package com.kitfox.svg;
+
+
+import com.kitfox.svg.xml.StyleAttribute;
+import java.awt.geom.*;
+import java.awt.*;
+import java.net.*;
+import java.util.LinkedList;
+import java.util.Vector;
+
+/**
+ * Maintains bounding box for this element
+ *
+ * @author Mark McKay
+ * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
+ */
+abstract public class RenderableElement extends TransformableElement 
+{
+
+    AffineTransform cachedXform = null;
+    Shape cachedClip = null;
+    
+    public static final int VECTOR_EFFECT_NONE = 0;
+    public static final int VECTOR_EFFECT_NON_SCALING_STROKE = 1;
+    int vectorEffect;
+
+    /** Creates a new instance of BoundedElement */
+    public RenderableElement() {
+    }
+
+    public RenderableElement(String id, SVGElement parent)
+    {
+        super(id, parent);
+    }
+
+    protected void build() throws SVGException
+    {
+        super.build();
+        
+        StyleAttribute sty = new StyleAttribute();
+        
+        if (getPres(sty.setName("vector-effect")))
+        {
+            if ("non-scaling-stroke".equals(sty.getStringValue()))
+            {
+                vectorEffect = VECTOR_EFFECT_NON_SCALING_STROKE;
+            }
+            else
+            {
+                vectorEffect = VECTOR_EFFECT_NONE;
+            }
+        }
+        else
+        {
+            vectorEffect = VECTOR_EFFECT_NONE;
+        }
+    }
+    
+    abstract public void render(Graphics2D g) throws SVGException;
+    
+    abstract void pick(Point2D point, Vector retVec) throws SVGException;
+    
+    abstract public Rectangle2D getBoundingBox() throws SVGException;
+/*
+    public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent)
+    {
+        super.loaderStartElement(helper, attrs, parent);
+    }
+*/
+    /**
+     * Pushes transform stack, transforms to local coordinates and sets up
+     * clipping mask.
+     */
+    protected void beginLayer(Graphics2D g) throws SVGException
+    {
+        if (xform != null)
+        {
+            cachedXform = g.getTransform();
+            g.transform(xform);
+        }
+
+        StyleAttribute styleAttrib = new StyleAttribute();
+        
+        //Get clipping path
+//        StyleAttribute styleAttrib = getStyle("clip-path", false);
+        Shape clipPath = null;
+        int clipPathUnits = ClipPath.CP_USER_SPACE_ON_USE;
+        if (getStyle(styleAttrib.setName("clip-path")))
+        {
+            URI uri = styleAttrib.getURIValue(getXMLBase());
+            if (uri != null)
+            {
+                ClipPath ele = (ClipPath)diagram.getUniverse().getElement(uri);
+                clipPath = ele.getClipPathShape();
+                clipPathUnits = ele.getClipPathUnits();
+            }
+        }
+
+        //Return if we're out of clipping range
+        if (clipPath != null)
+        {
+            if (clipPathUnits == ClipPath.CP_OBJECT_BOUNDING_BOX && (this instanceof ShapeElement))
+            {
+                Rectangle2D rect = ((ShapeElement)this).getBoundingBox();
+                AffineTransform at = new AffineTransform();
+                at.scale(rect.getWidth(), rect.getHeight());
+                clipPath = at.createTransformedShape(clipPath);
+            }
+
+            cachedClip = g.getClip();
+            Area newClip = new Area(cachedClip);
+            newClip.intersect(new Area(clipPath));
+            g.setClip(newClip);
+        }
+    }
+
+    /**
+     * Restores transform and clipping values to the way they were before
+     * this layer was drawn.
+     */
+    protected void finishLayer(Graphics2D g)
+    {
+        if (cachedClip != null)
+        {
+            g.setClip(cachedClip);
+        }
+
+        if (cachedXform != null)
+        {
+            g.setTransform(cachedXform);
+        }
+    }
+
+}