[Pfc-prolog-cvs] prolix/src/org/asturlinux/frade/prolix/web/servlets NodeDrawData.java,NONE,1.1 SvgG
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[Pfc-prolog-cvs] prolix/src/org/asturlinux/frade/prolix/web/servlets NodeDrawData.java,NONE,1.1 SvgGenerator.java,NONE,1.1 TreeServlet.java,1.1,1.2
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From: <iva...@us...> - 2003-07-30 20:12:51
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Update of /cvsroot/pfc-prolog/prolix/src/org/asturlinux/frade/prolix/web/servlets
In directory sc8-pr-cvs1:/tmp/cvs-serv20789/src/org/asturlinux/frade/prolix/web/servlets
Modified Files:
TreeServlet.java
Added Files:
NodeDrawData.java SvgGenerator.java
Log Message:
Added auxiliar classes to draw svg in servlet
--- NEW FILE: NodeDrawData.java ---
package org.asturlinux.frade.prolix.web.servlets;
import java.awt.Dimension;
import java.awt.Point;
public class NodeDrawData
{
public Dimension size;
public Point origin;
public NodeDrawData(Point originPoint, Dimension sizeBox)
{
origin = originPoint;
size = sizeBox;
}
}
--- NEW FILE: SvgGenerator.java ---
package org.asturlinux.frade.prolix.web.servlets;
import java.util.Iterator;
import java.io.Writer;
import java.io.IOException;
//import java.io.FileWriter;
//import java.io.FileReader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.*;
import org.xml.sax.SAXException;
import org.xml.sax.InputSource;
import java.awt.Dimension;
import java.awt.Point;
import java.util.Vector;
import java.io.StringWriter;
import java.io.StringReader;
import org.asturlinux.frade.prolix.web.servlets.NodeDrawData;
public class SvgGenerator {
/***************************
* Search methods
************************** */
/**
* return nodes with "name" that have an "attribute" with defined "value"
*/
private Node[] search(Node root, String name,
String attribute, String value)
{
Vector results = new Vector();
// Pass root element
if (root.getNodeType() == Node.DOCUMENT_NODE)
root = ((Document)root).getDocumentElement();
NodeList children = root.getChildNodes();
for ( int i = 0 ; i < children.getLength() ; i++)
{
Node currentNode = children.item(i);
int nodeType = currentNode.getNodeType();
if (nodeType == Node.ELEMENT_NODE &&
currentNode.getNodeName().equals(name) &&
currentNode.hasAttributes())
{
NamedNodeMap attMap = currentNode.getAttributes();
Node attrib = attMap.getNamedItem(attribute);
if (attrib != null &&
attrib.getNodeValue().equals(value))
results.add(currentNode);
}
} //for
//Not found
return (Node [])results.toArray(new Node[results.size()]);
}
private Node searchNodeByNumber(Node root, String number)
{
if (root.getNodeType() == Node.DOCUMENT_NODE)
root = ((Document)root).getDocumentElement();
NodeList children = root.getChildNodes();
for ( int i = 0 ; i < children.getLength() ; i++ )
{
Node currentNode = children.item(i);
int nodeType = currentNode.getNodeType();
if (nodeType == Node.ELEMENT_NODE &&
(currentNode.getNodeName().equals("node") ||
currentNode.getNodeName().equals("solution"))&&
currentNode.hasAttributes())
{
NamedNodeMap attMap = currentNode.getAttributes();
Node attribute = attMap.getNamedItem("number");
if (attribute != null &&
attribute.getNodeValue().equals(number))
return currentNode;
}
}
// not found
return null;
}
/** ********************************
* Draw methods
* ******************************** */
public static final int marginX = 10;
public static final int marginY = 5;
public static final int nodeSizeX = 60;
public static final int nodeSizeY = 40;
private Dimension drawNode(Node raiz, String number,
Point leftTopCorner,
Writer output)
{
Node result = searchNodeByNumber(raiz,number);
System.out.println("Looking for transitions");
Node[] result2 = search(raiz,"transition","origin",number);
Dimension boundingBox = new Dimension(0,0);
int childYBaseLine = leftTopCorner.y+marginY+nodeSizeY;
//Vector childPoints = new Vector();
Vector childBoxes = new Vector();
for (int i = 0; i < result2.length ; i++)
{
String destiny = result2[i].getAttributes().getNamedItem("destiny").getNodeValue();
Point childPoint = new Point(leftTopCorner.x+ boundingBox.width, childYBaseLine);
Dimension currentChildBoundingBox =
drawNode(raiz,destiny,childPoint,output);
childBoxes.add(new NodeDrawData(childPoint,currentChildBoundingBox));
boundingBox.width += currentChildBoundingBox.width + marginX;
boundingBox.height = Math.max(boundingBox.height,
currentChildBoundingBox.height);
}
boundingBox.width = Math.max(boundingBox.width,
nodeSizeX);
boundingBox.height += nodeSizeY + marginY;
System.out.println("Aqui pinto la cajita");
Point nodePoint = new Point(boundingBox.width / 2 + leftTopCorner.x
, leftTopCorner.y );
NodeDrawData[] destinations = (NodeDrawData[])childBoxes.toArray(new NodeDrawData[childBoxes.size()]);
for (int i = 0; i < destinations.length ; i++)
{
imprimirTransicion(nodePoint,destinations[i],output);
}
imprimirNodo(result,nodePoint,output);
return boundingBox;
}
private void imprimirTransicion(Point origen, NodeDrawData destino, Writer output)
{
try
{
output.write("<path d=\"M " + (origen.x + nodeSizeX/2)
+ " " + (origen.y+nodeSizeY)
+ " L " + (destino.origin.x + destino.size.width/2 + nodeSizeX/2)
+ " " + destino.origin.y + "\" \n");
output.write("id=\"" + origen.x*origen.y + "\"\n");
output.write("style=\"fill:none;fill-rule:evenodd;stroke:black;"
+ "stroke-opacity:1;stroke-width:0.5pt;stroke-linejoin:"
+ "miter;stroke-linecap:butt;fill-opacity:1;\"/>");
}
catch (IOException e) {
System.out.println("Error writing transition");
}
}
// And the refactoring winner is...
private void imprimirNodo(Node node, Point leftTopPoint,
Writer output)
{
// System.out.println("En el punto (" + leftTopPoint.x + ","
// + leftTopPoint.y + ") imprimo el nodo "
// + node.getAttributes().getNamedItem("number").getNodeValue());
try {
output.write("<rect \n "
+ "width=\"" + nodeSizeX + "\" \n"
+ "height=\"" + nodeSizeY + "\" \n"
+ "x=\"" + leftTopPoint.x + "\" \n"
+ "y=\"" + leftTopPoint.y + "\" \n"
+ "id=\""+node.getAttributes().getNamedItem("number").getNodeValue()+"\" \n"
+ "style=\"fill:#00ca00;fill-opacity:1;\" "
+ "/> \n");
Node label = node.getAttributes().getNamedItem("label");
if (label != null)
output.write("<text \n"
+ "x=\"" + (leftTopPoint.x + nodeSizeX/10) + "\" \n"
+ "y=\"" + (leftTopPoint.y + nodeSizeY/2 ) + "\" \n"
+ "id=\"text"
+ node.getAttributes().getNamedItem("number").getNodeValue()
+ "\">\n"
+ "<tspan id=\""
+ node.getAttributes().getNamedItem("number").getNodeValue()
+ "\" >\n"
+ label.getNodeValue()
+ "</tspan>"
+ "</text>");
} catch (IOException e) {
System.out.println("Error writing Node");
}
}
/**
* Aux methods
***/
private void initWriter(Writer w)
throws IOException
{
w.write("<?xml version=\"1.0\" "
+ "encoding=\"UTF-8\" standalone=\"no\"?>\n"
+ "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\"\n"
+ "\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n");
w.write("<svg xmlns=\"http://www.w3.org/2000/svg\"\n "
+ " xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n "
+ " version=\"1\"\n " + " x=\"30\" y=\"30\">\n ");
}
private void finishWriter(Writer w)
throws IOException
{
w.write("\n</svg>\n");
}
/** *************************************
* Main method
** ************************************* */
public String transform(String xmlString) {
try {
//FileReader xmlFile = new FileReader("/home/ivan/pfc/documentos/salida-prolix-treexml.xml");
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
//Document document = builder.parse(new InputSource(xmlFile));
Document document = builder.parse(new InputSource(new StringReader(xmlString)));
// Works with generic Writer.
StringWriter svg = new StringWriter();
initWriter(svg);
Dimension total = drawNode(document,"1",new Point(30,30),svg);
System.out.println("Dimensiones totales: " + total.width + " "
+ total.height);
finishWriter(svg);
svg.close();
System.out.println("Pues no paso nada malo");
return svg.toString();
}
catch (FactoryConfigurationError e) {
// unable to get a document builder factory
return null;
}
catch (ParserConfigurationException e) {
// parser was unable to be configured
return null;
}
catch (SAXException e) {
// parsing error
return null;
}
catch (IOException e) {
System.out.println("I/O Error: File Not Exist or Problems with Writers");
return null;
}
}
//public static void main(String argv[]) {
// SvgGenerator on = new SvgGenerator();
// String cool = on.transform();
// System.out.println(cool);
//}
}
Index: TreeServlet.java
===================================================================
RCS file: /cvsroot/pfc-prolog/prolix/src/org/asturlinux/frade/prolix/web/servlets/TreeServlet.java,v
retrieving revision 1.1
retrieving revision 1.2
diff -C2 -d -r1.1 -r1.2
*** TreeServlet.java 27 Jul 2003 14:24:22 -0000 1.1
--- TreeServlet.java 30 Jul 2003 20:12:49 -0000 1.2
***************
*** 5,8 ****
--- 5,9 ----
import javax.servlet.http.*;
import org.asturlinux.frade.prolix.web.beans.CurrentStateBean;
+ import org.asturlinux.frade.prolix.web.servlets.SvgGenerator;
public class TreeServlet extends HttpServlet
***************
*** 17,35 ****
CurrentStateBean bean = (CurrentStateBean)session.getAttribute("prologData");
! // FIXME response.setContentType("image/svg+xml");
PrintWriter out = response.getWriter();
- // XML header
- out.println("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n");
- out.println("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\" \"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\">\n");
-
- // SVG start
- out.println("<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" version=\"1\" x=\"0\" y=\"0\" width=\"744.094\" height=\"1052.36\" id=\"svg101\">\n");
-
- out.println("<defs id=\"defs103\" /> <rect width=\"244.357\" height=\"107.517\" x=\"87.9684\" y=\"120.549\" style=\"font-size:12;fill:#808080;fill-rule:evenodd;stroke-width:1pt;\" id=\"rect104\" />");
- out.println(bean.getCurrentResult());
-
- // SVG stop
- out.println("</svg> ");
}
}
--- 18,27 ----
CurrentStateBean bean = (CurrentStateBean)session.getAttribute("prologData");
! response.setContentType("image/svg+xml");
PrintWriter out = response.getWriter();
+ SvgGenerator comeOn = new SvgGenerator();
+ //FIXME Current Result can be null
+ out.println(comeOn.transform(bean.getCurrentResult()));
}
}
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