restrict number of nodes in web structure picture

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@3822 6c8d7289-2bf4-0310-a012-ef5d649a1542

htroot/WatchWebStructure_p.html

@@ -32,19 +32,21 @@ <h2>Web Structure</h2>
 	</dd>
 	<dt>depth</dt>
 	<dd>
-	<a href="WatchWebStructure_p.html?host=#[host]#&depth=#[depthd]#&width=#[width]#&height=#[height]#"><img src="env/grafics/minus.gif" /></a>
+	<a href="WatchWebStructure_p.html?host=#[host]#&depth=#[depthd]#&width=#[width]#&height=#[height]#&nodes=#[nodes]#"><img src="env/grafics/minus.gif" /></a>
 	<input type="text" name="depth" value="#[depth]#" size="1" maxlength="1" />
-    <a href="WatchWebStructure_p.html?host=#[host]#&depth=#[depthi]#&width=#[width]#&height=#[height]#"><img src="env/grafics/plus.gif" /></a>
+    <a href="WatchWebStructure_p.html?host=#[host]#&depth=#[depthi]#&width=#[width]#&height=#[height]#&nodes=#[nodes]#"><img src="env/grafics/plus.gif" /></a>
 	</dd>
 	<dt>size</dt>
 	<dd><input type="text" name="width" value="#[width]#" size="4" maxlength="4" />&nbsp;x&nbsp;<input type="text" name="height" value="#[height]#" size="4" maxlength="4" /></dd>
+    <dt>nodes</dt>
+	<dd><input type="text" name="nodes" value="#[nodes]#" size="4" maxlength="4" /></dd>
     <dt>&nbsp;</dt>
     <dd><input type="submit" value="change" /></dd>
 </dl>
 </form>
 </div>
 
-<img src="WebStructurePicture_p.png?host=#[host]#&depth=#[depth]#&width=#[width]#&height=#[height]#" />
+<img src="WebStructurePicture_p.png?host=#[host]#&depth=#[depth]#&width=#[width]#&height=#[height]#&nodes=#[nodes]#" />
 
 #%env/templates/footer.template%# 
 </body>

htroot/WatchWebStructure_p.java

@@ -16,12 +16,14 @@ public static serverObjects respond(httpHeader header, serverObjects post, serve
         int width = 768;
         int height = 576;
         int depth = 3;
+        int nodes = 100; // maximum number of host nodes that are painted
         String host = "auto";
 
         if (post != null) {
             width = post.getInt("width", 768);
             height = post.getInt("height", 576);
             depth = post.getInt("depth", 3);
+            nodes = post.getInt("nodes", width * height * 100 / 768 / 576);
             host = post.get("host", "auto");
         }
 
@@ -47,6 +49,7 @@ public static serverObjects respond(httpHeader header, serverObjects post, serve
         prop.put("depthd", Math.max(0, depth - 1));
         prop.put("width", width);
         prop.put("height", height);
+        prop.put("nodes", nodes);
 
         return prop;
     }

htroot/WebStructurePicture_p.java

@@ -50,12 +50,14 @@ public static ymageMatrix respond(httpHeader header, serverObjects post, serverS
         int width = 768;
         int height = 576;
         int depth = 3;
+        int nodes = 100; // maximum number of host nodes that are painted
         String host = null;
 
         if (post != null) {
             width = post.getInt("width", 768);
             height = post.getInt("height", 576);
             depth = post.getInt("depth", 3);
+            nodes = post.getInt("nodes", width * height * 100 / 768 / 576);
             host = post.get("host", null);
         }
 
@@ -81,19 +83,24 @@ public static ymageMatrix respond(httpHeader header, serverObjects post, serverS
 
         // recursively find domains, up to a specific depth
         ymageGraph graph = new ymageGraph();
-        if (host != null) place(graph, sb.webStructure, hash, host, 0.0, 0.0, 0, depth);
+        if (host != null) place(graph, sb.webStructure, hash, host, nodes, 0.0, 0.0, 0, depth);
         //graph.print();
 
         return graph.draw(width, height, 40, 40, 5, 15);
 
     }
 
-    private static final void place(ymageGraph graph, plasmaWebStructure structure, String centerhash, String centerhost, double x, double y, int nextlayer, int maxlayer) {
-        // returns the host string
+    private static final int place(ymageGraph graph, plasmaWebStructure structure, String centerhash, String centerhost, int maxnodes, double x, double y, int nextlayer, int maxlayer) {
+        // returns the number of nodes that had been placed
         assert centerhost != null;
         ymageGraph.coordinate center = graph.getPoint(centerhost);
-        if (center == null) center = graph.addPoint(centerhost, x, y, nextlayer);
-        if (nextlayer == maxlayer) return;
+        int mynodes = 0;
+        if (center == null) {
+        	center = graph.addPoint(centerhost, x, y, nextlayer);
+        	maxnodes--;
+        	mynodes++;
+        }
+        if (nextlayer == maxlayer) return mynodes;
         nextlayer++;
         double radius = 1.0 / ((double) (1 << nextlayer));
         Map next = structure.references(centerhash);
@@ -105,7 +112,7 @@ private static final void place(ymageGraph graph, plasmaWebStructure structure,
         int maxtargetrefs = 8, maxthisrefs = 8;
         int targetrefs, thisrefs;
         double rr, re;
-        while (i.hasNext()) {
+        while ((i.hasNext()) && (maxnodes > 0)) {
             entry = (Map.Entry) i.next();
             targethash = (String) entry.getKey();
             targethost = structure.resolveDomHash2DomString(targethash);
@@ -122,20 +129,25 @@ private static final void place(ymageGraph graph, plasmaWebStructure structure,
             rr = radius * 0.25 * (1 - targetrefs / maxtargetrefs);
             re = radius * 0.5 * (thisrefs / maxthisrefs);
             graph.addPoint(targethost, x + (radius - rr - re) * Math.cos(angle), y + (radius - rr - re) * Math.sin(angle), nextlayer);
+            maxnodes--;
+            mynodes++;
         }
         // recursively set next hosts
         i = targets.iterator();
         String[] target;
+        int nextnodes;
         while (i.hasNext()) {
             target = (String[]) i.next();
             targethash = target[0];
             targethost = target[1];
             ymageGraph.coordinate c = graph.getPoint(targethost);
             assert c != null;
-            place(graph, structure, targethash, targethost, c.x, c.y, nextlayer, maxlayer);
+            nextnodes = (maxnodes <= 0) ? 0 : place(graph, structure, targethash, targethost, maxnodes, c.x, c.y, nextlayer, maxlayer);
+            mynodes += nextnodes;
+            maxnodes -= nextnodes;
             graph.setBorder(centerhost, targethost);
         }
-        return;
+        return mynodes;
     }
 
 }