support for external svg document/image

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@193678 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 100 insertions, 0 deletions

diff --git a/src/org/apache/fop/image/analyser/ImageReaderFactory.java b/src/org/apache/fop/image/analyser/ImageReaderFactory.java
index 85a72fc6a..f4f36a6df 100644
--- a/src/org/apache/fop/image/analyser/ImageReaderFactory.java
+++ b/src/org/apache/fop/image/analyser/ImageReaderFactory.java
@@ -74,6 +74,7 @@ public class ImageReaderFactory {
     formats.add(new BMPReader());
     formats.add(new GIFReader());
     formats.add(new PNGReader());
+    formats.add(new SVGReader());
     //
 
     ImageReader reader;
diff --git a/src/org/apache/fop/image/analyser/SVGReader.java b/src/org/apache/fop/image/analyser/SVGReader.java
new file mode 100644
index 000000000..e314070f1
--- /dev/null
+++ b/src/org/apache/fop/image/analyser/SVGReader.java
@@ -0,0 +1,99 @@
+/*
+ ============================================================================
+                   The Apache Software License, Version 1.1
+ ============================================================================
+    Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
+ Redistribution and use in source and binary forms, with or without modifica-
+ tion, are permitted provided that the following conditions are met:
+ 1. Redistributions of  source code must  retain the above copyright  notice,
+    this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+ 3. The end-user documentation included with the redistribution, if any, must
+    include  the following  acknowledgment:  "This product includes  software
+    developed  by the  Apache Software Foundation  (http://www.apache.org/)."
+    Alternately, this  acknowledgment may  appear in the software itself,  if
+    and wherever such third-party acknowledgments normally appear.
+ 4. The names "Fop" and  "Apache Software Foundation"  must not be used to
+    endorse  or promote  products derived  from this  software without  prior
+    written permission. For written permission, please contact
+    apache@apache.org.
+ 5. Products  derived from this software may not  be called "Apache", nor may
+    "Apache" appear  in their name,  without prior written permission  of the
+    Apache Software Foundation.
+ THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ FITNESS  FOR A PARTICULAR  PURPOSE ARE  DISCLAIMED.  IN NO  EVENT SHALL  THE
+ APACHE SOFTWARE  FOUNDATION  OR ITS CONTRIBUTORS  BE LIABLE FOR  ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL,  EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLU-
+ DING, BUT NOT LIMITED TO, PROCUREMENT  OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ OF USE, DATA, OR  PROFITS; OR BUSINESS  INTERRUPTION)  HOWEVER CAUSED AND ON
+ ANY  THEORY OF LIABILITY,  WHETHER  IN CONTRACT,  STRICT LIABILITY,  OR TORT
+ (INCLUDING  NEGLIGENCE OR  OTHERWISE) ARISING IN  ANY WAY OUT OF THE  USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ This software  consists of voluntary contributions made  by many individuals
+ on  behalf of the Apache Software  Foundation and was  originally created by
+ James Tauber <jtauber@jtauber.com>. For more  information on the Apache
+ Software Foundation, please see <http://www.apache.org/>.
+ */
+
+package org.apache.fop.image.analyser;
+
+// Java
+import java.io.BufferedInputStream;
+import java.io.IOException;
+
+import org.w3c.dom.svg.SVGDocument;
+import org.w3c.dom.svg.SVGSVGElement;
+
+// FOP
+import org.apache.fop.svg.SVGDriver;
+import org.apache.fop.messaging.*;
+import org.apache.fop.image.SVGImage;
+
+import org.xml.sax.InputSource;
+import org.xml.sax.XMLReader;
+
+/**
+ * ImageReader object for SVG document image type.
+ */
+public class SVGReader extends AbstractImageReader {
+
+  public boolean verifySignature(BufferedInputStream fis) throws IOException {
+    this.imageStream = fis;
+    return loadImage();
+  }
+
+  public String getMimeType() {
+    return "image/svg";
+  }
+
+  /**
+   * This means the external svg document will be loaded twice.
+   * Possibly need a slightly different design for the image stuff.
+   */
+  protected boolean loadImage()
+  {
+    // parse document and get the size attributes of the svg element
+  try {
+	    SVGDriver driver = new SVGDriver();
+	    driver.addElementMapping("org.apache.fop.svg.SVGElementMapping");
+	    driver.addPropertyList("org.apache.fop.svg.SVGPropertyListMapping");
+		XMLReader parser = SVGImage.createParser();
+	    driver.buildSVGTree(parser, new InputSource(this.imageStream));
+	    SVGDocument doc = driver.getSVGDocument();
+	    SVGSVGElement svg = doc.getRootElement();
+		this.width = (int)svg.getWidth().getBaseVal().getValue() * 1000;
+		this.height = (int)svg.getHeight().getBaseVal().getValue() * 1000;
+		return true;
+	} catch (Exception e) {
+	    MessageHandler.errorln("ERROR LOADING EXTERNAL SVG: " + e.getMessage());
+	    // assuming any exception means this document is not svg
+	    // or could not be loaded for some reason
+	    return false;
+	}
+  }
+
+}
+