fixed link/resolving problem

made sure area tree is serializable


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@195405 13f79535-47bb-0310-9956-ffa450edef68

src/org/apache/fop/area/AreaTree.java

@@ -397,23 +397,31 @@ public class AreaTree {
         public void addPage(PageViewport page) {
             super.addPage(page);
 
-            // check prepared pages
-            boolean cont = checkPreparedPages();
-
-            // if page finished
-            if (cont && page.isResolved()) {
+            // for links the renderer needs to prepare the page
+            // it is more appropriate to do this after queued pages but
+            // it will mean that the renderer has not prepared a page that
+            // could be referenced
+            boolean done = renderer.supportsOutOfOrder() && page.isResolved();
+            if (done) {
                 try {
                     renderer.renderPage(page);
                 } catch (Exception e) {
                     // use error handler to handle this FOP or IO Exception
+                    e.printStackTrace();
                 }
                 page.clear();
             } else {
                 preparePage(page);
             }
 
-            renderExtensions(pendingExt);
-            pendingExt.clear();
+
+            // check prepared pages
+            boolean cont = checkPreparedPages(page);
+
+            if (cont) {
+                renderExtensions(pendingExt);
+                pendingExt.clear();
+            }
         }
 
         /**
@@ -422,7 +430,7 @@ public class AreaTree {
          *         false if the renderer doesn't support out of order
          *         rendering and there are pending pages
          */
-        protected boolean checkPreparedPages() {
+        protected boolean checkPreparedPages(PageViewport newpage) {
             for (Iterator iter = prepared.iterator(); iter.hasNext();) {
                 PageViewport p = (PageViewport)iter.next();
                 if (p.isResolved()) {
@@ -430,6 +438,7 @@ public class AreaTree {
                         renderer.renderPage(p);
                     } catch (Exception e) {
                         // use error handler to handle this FOP or IO Exception
+                        e.printStackTrace();
                     }
                     p.clear();
                     iter.remove();
@@ -491,7 +500,11 @@ public class AreaTree {
          */
         public void endDocument() {
             // render any pages that had unresolved ids
-            checkPreparedPages();
+            checkPreparedPages(null);
+
+            renderExtensions(pendingExt);
+            pendingExt.clear();
+
             renderExtensions(endDocExt);
         }
     }

src/org/apache/fop/area/CachedRenderPagesModel.java

@@ -45,30 +45,33 @@ public class CachedRenderPagesModel extends AreaTree.RenderPagesModel {
      *         false if the renderer doesn't support out of order
      *         rendering and there are pending pages
      */
-    protected boolean checkPreparedPages() {
+    protected boolean checkPreparedPages(PageViewport newpage) {
         for (Iterator iter = prepared.iterator(); iter.hasNext();) {
             PageViewport p = (PageViewport)iter.next();
             if (p.isResolved()) {
-                try {
-                    // load page from cache
-                    String name = (String)pageMap.get(p);
-                    File temp = new File(name);
-                    System.out.println("page serialized to: " + temp.length());
-                    ObjectInputStream in = new ObjectInputStream(
-                                         new BufferedInputStream(
-                                           new FileInputStream(temp)));
-                    p.loadPage(in);
-                    in.close();
-                    temp.delete();
-                    pageMap.remove(p);
-                } catch (Exception e) {
-                    e.printStackTrace();
+                if(p != newpage) {
+                    try {
+                        // load page from cache
+                        String name = (String)pageMap.get(p);
+                        File temp = new File(name);
+                        System.out.println("page serialized to: " + temp.length());
+                        ObjectInputStream in = new ObjectInputStream(
+                                             new BufferedInputStream(
+                                               new FileInputStream(temp)));
+                        p.loadPage(in);
+                        in.close();
+                        temp.delete();
+                        pageMap.remove(p);
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    }
                 }
 
                 try {
                     renderer.renderPage(p);
                 } catch (Exception e) {
                     // use error handler to handle this FOP or IO Exception
+                    e.printStackTrace();
                 }
                 p.clear();
                 iter.remove();
@@ -78,18 +81,19 @@ public class CachedRenderPagesModel extends AreaTree.RenderPagesModel {
                 }
             }
         }
+        if(newpage != null && newpage.getPage() != null) {
+            savePage(newpage);
+        }
         return renderer.supportsOutOfOrder() || prepared.isEmpty();
     }
 
     /**
-     * Prepare a page.
-     * This uses the parent to prepare the page.
-     * It then saves the contents of the page to a file.
+     * Save a page.
+     * It saves the contents of the page to a file.
+     *
      * @param page the page to prepare
      */
-    protected void preparePage(PageViewport page) {
-        super.preparePage(page);
-
+    protected void savePage(PageViewport page) {
         try {
             // save page to cache
             ObjectOutputStream tempstream;

src/org/apache/fop/area/PageViewport.java

@@ -89,6 +89,17 @@ public class PageViewport implements Resolveable, Cloneable {
         return pageNumber;
     }
 
+    /**
+     * Get the key for this page viewport.
+     * This is used so that a serializable key can be used to
+     * lookup the page or some other reference.
+     *
+     * @return a unique page viewport key for this area tree
+     */
+    public String getKey() {
+        return toString();
+    }
+
     /**
      * Add an unresolved id to this page.
      * All unresolved ids for the contents of this page are

src/org/apache/fop/area/Trait.java

@@ -117,7 +117,7 @@ public class Trait implements Serializable {
         shmTraitInfo = new HashMap();
         shmTraitInfo.put(ID_LINK, new TraitInfo("id-link", String.class));
         shmTraitInfo.put(INTERNAL_LINK,
-                          new TraitInfo("internal-link", PageViewport.class));
+                          new TraitInfo("internal-link", String.class));
         shmTraitInfo.put(EXTERNAL_LINK,
                           new TraitInfo("external-link", String.class));
         shmTraitInfo.put(FONT_NAME,
@@ -229,7 +229,7 @@ public class Trait implements Serializable {
         return null;
     }
 
-    public static class Background {
+    public static class Background implements Serializable {
         public ColorType color = null;
         public String url = null;
         public int repeat;

src/org/apache/fop/datatypes/ColorType.java

@@ -8,11 +8,12 @@
 package org.apache.fop.datatypes;
 
 import java.util.*;
+import java.io.Serializable;
 
 /**
  * a colour quantity in XSL
  */
-public class ColorType {
+public class ColorType implements Serializable {
 
     /**
      * the red component

src/org/apache/fop/fo/flow/BasicLink.java

@@ -63,7 +63,7 @@ public class BasicLink extends Inline {
         } else {
             PageViewport page = parentLM.resolveRefID(link);
             if (page != null) {
-                area.addTrait(Trait.INTERNAL_LINK, page);
+                area.addTrait(Trait.INTERNAL_LINK, page.getKey());
             } else {
                 LinkResolver res = new LinkResolver(link, area);
                 parentLM.addUnresolvedArea(link, res);
@@ -148,7 +148,7 @@ public class BasicLink extends Inline {
             resolved = true;
             if (idRef.equals(id) && pages != null) {
                 PageViewport page = (PageViewport)pages.get(0);
-                area.addTrait(Trait.INTERNAL_LINK, page);
+                area.addTrait(Trait.INTERNAL_LINK, page.getKey());
             }
         }
     }

src/org/apache/fop/pdf/PDFDocument.java

@@ -1229,7 +1229,7 @@ public class PDFDocument {
      * @return the PDFLink object created
      */
     public PDFLink makeLink(Rectangle2D rect, String destination,
-                            int linkType) {
+                            int linkType, float yoffset) {
 
         PDFLink linkObject;
         PDFAction action;
@@ -1240,7 +1240,10 @@ public class PDFDocument {
 
         if (linkType == PDFLink.EXTERNAL) {
             // check destination
-            if (destination.endsWith(".pdf")) {    // FileSpec
+            if (destination.startsWith("http://")) {
+                PDFUri uri = new PDFUri(destination);
+                link.setAction(uri);
+            } else if (destination.endsWith(".pdf")) {    // FileSpec
                 PDFFileSpec fileSpec = new PDFFileSpec(++this.objectcount,
                                                        destination);
                 this.objects.add(fileSpec);
@@ -1267,17 +1270,19 @@ public class PDFDocument {
                 PDFUri uri = new PDFUri(destination);
                 link.setAction(uri);
             }
-        } else {                                   // linkType is internal
-            String goToReference = getGoToReference(destination);
+        } else {
+            // linkType is internal
+            String goToReference = getGoToReference(destination, yoffset);
             PDFInternalLink internalLink = new PDFInternalLink(goToReference);
             link.setAction(internalLink);
         }
         return link;
     }
 
-    private String getGoToReference(String destination) {
+    private String getGoToReference(String destination, float yoffset) {
         String goToReference = null;
         PDFGoTo gt = new PDFGoTo(++this.objectcount, destination);
+        gt.setYPosition(yoffset);
         goToReference = gt.referencePDF();
         addTrailerObject(gt);
         return goToReference;
@@ -1383,8 +1388,8 @@ public class PDFDocument {
      * @return the new PDF outline object
      */
     public PDFOutline makeOutline(PDFOutline parent, String label,
-                                  String destination) {
-        String goToRef = getGoToReference(destination);
+                                  String destination, float yoffset) {
+        String goToRef = getGoToReference(destination, yoffset);
 
         PDFOutline obj = new PDFOutline(++this.objectcount, label, goToRef);
 

src/org/apache/fop/pdf/PDFGoTo.java

@@ -52,8 +52,8 @@ public class PDFGoTo extends PDFAction {
      *
      * @param yPosition y position
      */
-    public void setYPosition(int yPosition) {
-        this.yPosition = (yPosition / 1000f);
+    public void setYPosition(float yPosition) {
+        this.yPosition = yPosition;
     }
 
     public void setDestination(String dest) {

src/org/apache/fop/pdf/PDFPage.java

@@ -121,7 +121,6 @@ public class PDFPage extends PDFResourceContext {
         }
 
         sb = sb.append(">>\nendobj\n");
-
         return sb.toString().getBytes();
     }
 

src/org/apache/fop/render/pdf/PDFRenderer.java

@@ -109,6 +109,7 @@ public class PDFRenderer extends PrintRenderer {
      * for pdf this means we need the pdf page reference
      */
     protected HashMap pageReferences = new HashMap();
+    protected HashMap pvReferences = new HashMap();
 
     private String producer;
 
@@ -273,14 +274,18 @@ public class PDFRenderer extends PrintRenderer {
     private void renderOutline(BookmarkData outline, PDFOutline parentOutline) {
         PDFOutline outlineRoot = pdfDoc.getOutlineRoot();
         PDFOutline pdfOutline = null;
-        String intDest = (String)pageReferences.get(outline.getPage());
+        PageViewport pv = outline.getPage();
+        Rectangle2D bounds = pv.getViewArea();
+        double h = bounds.getHeight();
+        float yoffset = (float)h / 1000f;
+        String intDest = (String)pageReferences.get(pv.getKey());
         if (parentOutline == null) {
             pdfOutline = pdfDoc.makeOutline(outlineRoot,
-                                    outline.getLabel(), intDest);
+                                    outline.getLabel(), intDest, yoffset);
         } else {
             PDFOutline pdfParentOutline = parentOutline;
             pdfOutline = pdfDoc.makeOutline(pdfParentOutline,
-                                    outline.getLabel(), intDest);
+                                    outline.getLabel(), intDest, yoffset);
         }
 
         for (int i = 0; i < outline.getCount(); i++) {
@@ -315,7 +320,8 @@ public class PDFRenderer extends PrintRenderer {
             pages = new HashMap();
         }
         pages.put(page, currentPage);
-        pageReferences.put(page, currentPage.referencePDF());
+        pageReferences.put(page.getKey(), currentPage.referencePDF());
+        pvReferences.put(page.getKey(), page);
     }
 
     /**
@@ -339,7 +345,8 @@ public class PDFRenderer extends PrintRenderer {
             pageHeight = (int) h;
             currentPage = this.pdfDoc.makePage(this.pdfResources,
                               (int) Math.round(w / 1000), (int) Math.round(h / 1000));
-            pageReferences.put(page, currentPage.referencePDF());
+            pageReferences.put(page.getKey(), currentPage.referencePDF());
+            pvReferences.put(page.getKey(), page);
         }
         currentStream =
           this.pdfDoc.makeStream(PDFStream.CONTENT_FILTER, false);
@@ -678,12 +685,19 @@ public class PDFRenderer extends PrintRenderer {
         Object tr = ip.getTrait(Trait.INTERNAL_LINK);
         boolean internal = false;
         String dest = null;
+        float yoffset = 0;
         if (tr == null) {
             dest = (String)ip.getTrait(Trait.EXTERNAL_LINK);
         } else {
-            PageViewport pv = (PageViewport)tr;
-            dest = (String)pageReferences.get(pv);
-            internal = true;
+            String pvKey = (String)tr;
+            dest = (String)pageReferences.get(pvKey);
+            if(dest != null) {
+                PageViewport pv = (PageViewport)pvReferences.get(pvKey);
+                Rectangle2D bounds = pv.getViewArea();
+                double h = bounds.getHeight();
+                yoffset = (float)h / 1000f;
+                internal = true;
+            }
         }
         if (dest != null) {
             // add link to pdf document
@@ -693,7 +707,7 @@ public class PDFRenderer extends PrintRenderer {
             rect = transform.createTransformedShape(rect).getBounds();
 
             int type = internal ? PDFLink.INTERNAL : PDFLink.EXTERNAL;
-            PDFLink pdflink = pdfDoc.makeLink(rect, dest, type);
+            PDFLink pdflink = pdfDoc.makeLink(rect, dest, type, yoffset);
             currentPage.addAnnotation(pdflink);
         }
     }

src/org/apache/fop/svg/PDFGraphics2D.java

@@ -277,7 +277,7 @@ public class PDFGraphics2D extends AbstractGraphics2D {
             resourceContext.addAnnotation(pdfDoc.makeLink(rect, pageRef, pdfdest));
         } else {
             resourceContext.addAnnotation(pdfDoc.makeLink(rect,
-                                                 dest, linkType));
+                                                 dest, linkType, 0));
         }
     }
 

src/org/apache/fop/traits/BorderProps.java

@@ -9,7 +9,13 @@ package org.apache.fop.traits;
 
 import org.apache.fop.datatypes.ColorType;
 
-public class BorderProps {
+import java.io.Serializable;
+
+/**
+ * Border properties.
+ * Class to store border trait propties for the area tree.
+ */
+public class BorderProps implements Serializable {
     public int style; // Enum for border style
     public ColorType color; // Border color
     public int width; // Border width