keep rat-check quiet, also started writing xslf docs

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1198722 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 176 insertions, 0 deletions

diff --git a/src/examples/src/org/apache/poi/xslf/usermodel/PPTX2SVG.txt b/src/examples/src/org/apache/poi/xslf/usermodel/PPTX2SVG.txt
new file mode 100644
index 0000000000..dbe089ac30
--- /dev/null
+++ b/src/examples/src/org/apache/poi/xslf/usermodel/PPTX2SVG.txt
@@ -0,0 +1,176 @@
+/*
+ *  ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one or more
+ *    contributor license agreements.  See the NOTICE file distributed with
+ *    this work for additional information regarding copyright ownership.
+ *    The ASF licenses this file to You under the Apache License, Version 2.0
+ *    (the "License"); you may not use this file except in compliance with
+ *    the License.  You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ * ====================================================================
+ */
+
+package org.apache.poi.xslf.usermodel;
+
+import org.apache.batik.dom.svg.SVGDOMImplementation;
+import org.apache.batik.svggen.SVGGraphics2D;
+import org.apache.batik.transcoder.wmf.tosvg.WMFPainter;
+import org.apache.batik.transcoder.wmf.tosvg.WMFRecordStore;
+import org.apache.poi.openxml4j.opc.OPCPackage;
+import org.apache.poi.openxml4j.opc.PackagePart;
+import org.w3c.dom.DOMImplementation;
+import org.w3c.dom.Document;
+
+import javax.imageio.ImageIO;
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+import java.awt.Dimension;
+import java.awt.Graphics2D;
+import java.awt.geom.Rectangle2D;
+import java.awt.image.BufferedImage;
+import java.io.DataInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+
+/**
+ * Convert each slide of a .pptx presentation into SVG
+ *
+ * @author Yegor Kozlov
+ */
+public class PPTX2SVG {
+
+    static void usage() {
+        System.out.println("Usage: PPTX2SVG  <pptx file>");
+    }
+
+    public static void main(String[] args) throws Exception {
+        if (args.length == 0) {
+            usage();
+            return;
+        }
+
+        String file = args[0];
+
+        System.out.println("Processing " + file);
+
+        // read the .pptx file
+        XMLSlideShow ppt = new XMLSlideShow(OPCPackage.open(file));
+
+        Dimension pgsize = ppt.getPageSize();
+
+        // convert each slide into a .svg file
+        XSLFSlide[] slide = ppt.getSlides();
+        for (int i = 0; i < slide.length; i++) {
+            // Create initial SVG DOM
+            DOMImplementation domImpl = SVGDOMImplementation.getDOMImplementation();
+            Document doc = domImpl.createDocument("http://www.w3.org/2000/svg", "svg", null);
+            //Use Batik SVG Graphics2D driver
+            SVGGraphics2D graphics = new SVGGraphics2D(doc);
+            graphics.setRenderingHint(XSLFRenderingHint.IMAGE_RENDERER, new WMFImageRender());
+            graphics.setSVGCanvasSize(pgsize);
+
+            String title = slide[i].getTitle();
+            System.out.println("Rendering slide " + (i + 1) + (title == null ? "" : ": " + title));
+
+            // draw stuff. All the heavy-lifting happens here
+            slide[i].draw(graphics);
+
+            // save the result.
+            int sep = file.lastIndexOf(".");
+            String fname = file.substring(0, sep == -1 ? file.length() : sep) + "-" + (i + 1) + ".svg";
+            OutputStreamWriter out =
+                    new OutputStreamWriter(new FileOutputStream(fname), "UTF-8");
+            DOMSource domSource = new DOMSource(graphics.getRoot());
+            StreamResult streamResult = new StreamResult(out);
+            TransformerFactory tf = TransformerFactory.newInstance();
+            Transformer serializer = tf.newTransformer();
+            serializer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
+            serializer.setOutputProperty(OutputKeys.INDENT, "yes");
+            serializer.transform(domSource, streamResult);
+            out.flush();
+            out.close();
+        }
+        System.out.println("Done");
+    }
+
+    /**
+     * Image renderer with support for .wmf images
+     */
+    static class WMFImageRender extends XSLFImageRendener {
+
+        /**
+         * Use Apache Batik to render WMF,
+         * delegate all other types of images to the javax.imageio framework
+       */
+        @Override
+        public boolean drawImage(Graphics2D graphics, XSLFPictureData data,
+                                 Rectangle2D anchor) {
+            try {
+                // see what type of image we are
+                PackagePart part = data.getPackagePart();
+                String contentType = part.getContentType();
+                if (contentType.equals("image/x-wmf")) {
+                    WMFRecordStore currentStore = new WMFRecordStore();
+                    currentStore.read(new DataInputStream(part.getInputStream()));
+                    int wmfwidth = currentStore.getWidthPixels();
+                    float conv = (float) anchor.getWidth() / wmfwidth;
+
+                    // Build a painter for the RecordStore
+                    WMFPainter painter = new WMFPainter(currentStore,
+                            (int) anchor.getX(), (int) anchor.getY(), conv);
+                    painter.paint(graphics);
+                } else {
+                    BufferedImage img = ImageIO.read(data.getPackagePart().getInputStream());
+                    graphics.drawImage(img,
+                            (int) anchor.getX(), (int) anchor.getY(),
+                            (int) anchor.getWidth(), (int) anchor.getHeight(), null);
+                }
+            } catch (Exception e) {
+                return false;
+            }
+            return true;
+        }
+
+        /**
+         * Convert data form the supplied package part into a BufferedImage.
+         * This method is used to create texture paint.
+         */
+        @Override
+        public BufferedImage readImage(PackagePart packagePart) throws IOException {
+            String contentType = packagePart.getContentType();
+            if (contentType.equals("image/x-wmf")) {
+                try {
+                    WMFRecordStore currentStore = new WMFRecordStore();
+                    currentStore.read(new DataInputStream(packagePart.getInputStream()));
+                    int wmfwidth = currentStore.getWidthPixels();
+                    int wmfheight = currentStore.getHeightPixels();
+
+                    BufferedImage img = new BufferedImage(wmfwidth, wmfheight, BufferedImage.TYPE_INT_RGB);
+                    Graphics2D graphics = img.createGraphics();
+
+                    // Build a painter for the RecordStore
+                    WMFPainter painter = new WMFPainter(currentStore, 0, 0, 1.0f);
+                    painter.paint(graphics);
+
+                    return img;
+                } catch (IOException e) {
+                    return null;
+                }
+            } else {
+                return ImageIO.read(packagePart.getInputStream());
+            }
+        }
+
+    }
+}