/**
* Copyright 2007-2010 非也
* All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License v3 as published by the Free Software
* Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this library; if not, see http://www.gnu.org/licenses/lgpl.html.
*
*/
package org.fireflow.webdesigner.servlet.handlers;
import java.io.IOException;
import java.io.OutputStream;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.fireflow.client.WorkflowSession;
import org.fireflow.client.WorkflowSessionFactory;
import org.fireflow.client.WorkflowStatement;
import org.fireflow.clientwidget.BrowserUtils;
import org.fireflow.clientwidget.servlet.ActionHandler;
import org.fireflow.clientwidget.tag.ClientWidgetBase;
import org.fireflow.engine.context.RuntimeContext;
import org.fireflow.engine.entity.repository.ProcessKey;
import org.fireflow.engine.modules.ousystem.impl.FireWorkflowSystem;
import org.fireflow.model.InvalidModelException;
import org.fireflow.pdl.fpdl.diagram.Diagram;
import org.fireflow.pdl.fpdl.misc.FpdlConstants;
import org.fireflow.pdl.fpdl.process.WorkflowProcess;
import org.fireflow.webdesigner.transformer.FpdlDiagramSerializer;
import org.fireflow.webdesigner.transformer.FpdlDiagramSerializerSvgImpl;
import org.fireflow.webdesigner.transformer.FpdlDiagramSerializerVmlImpl;
/**
*
* @author 非也 nychen2000@163.com
* Fire Workflow 官方网站：www.firesoa.com 或者 www.fireflow.org
*
*/
public class GetProcessDiagramHandler implements ActionHandler {
/* (non-Javadoc)
* @see org.fireflow.clientwidget.servlet.ActionHandler#handleRequest(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void handleRequest(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String processId = req.getParameter("processId");
String version = req.getParameter("processVersion");
String processType = req.getParameter("processType");
String subProcessName = req.getParameter("subProcessName");
// String svgId = req.getParameter("svgVmlId");
if (subProcessName==null || subProcessName.trim().equals("")){
subProcessName = WorkflowProcess.MAIN_PROCESS_NAME;
}
int v = 1;
if (version!=null && !version.trim().equals("")){
try{
v = Integer.parseInt(version);
}catch(Exception e){
}
}
if (processType==null || processType.trim().equals("")){
processType = FpdlConstants.PROCESS_TYPE_FPDL20;
}
RuntimeContext runtimeContext = RuntimeContext.getInstance();
FireWorkflowSystem user = FireWorkflowSystem.getInstance();
WorkflowSession session = WorkflowSessionFactory.createWorkflowSession(runtimeContext, user);
WorkflowStatement stmt = session.createWorkflowStatement();
WorkflowProcess process = null;
try{
process = (WorkflowProcess)stmt.getWorkflowProcess(new ProcessKey(processId,v,FpdlConstants.PROCESS_TYPE_FPDL20));
}catch(InvalidModelException e){
throw new ServletException(e);
}
String encoding = resp.getCharacterEncoding();
if (encoding==null || encoding.trim().endsWith("")){
encoding="UTF-8";
resp.setCharacterEncoding(encoding);
}
boolean isIE = BrowserUtils.isIE(req);
double ieVersion = BrowserUtils.getIEversion(req);
if (isIE && ieVersion<9){
outputVml(process,subProcessName,encoding,req,resp);
}else{
outputSvg(process,subProcessName,encoding,req,resp);
}
}
private void outputSvg(WorkflowProcess process,String subProcessName,
String encoding,HttpServletRequest req,HttpServletResponse resp)
throws ServletException, IOException {
/*
String svg = FpdlExporter.exportToSVGDiagram(process, subProcessName,
svgId,width,height,//给一个足够大的高和宽
ClientWidgetBase.FIREFLOW_RESOURCE_SERVLET,
req.getContextPath(),encoding);
*/
/* */
String contextPath = req.getContextPath();
if (contextPath==null)contextPath="";
String resourceServletPath = ClientWidgetBase.FIREFLOW_RESOURCE_SERVLET;
if (resourceServletPath==null) resourceServletPath="";
if (contextPath.endsWith("/") && resourceServletPath.startsWith("/")){
contextPath = contextPath.substring(0,contextPath.length()-1);
}
FpdlDiagramSerializer ser = new FpdlDiagramSerializerSvgImpl();
ser.setResourcePathPrefix(contextPath+resourceServletPath);
String svg = ser.serializeDiagramToStr(process, subProcessName, encoding, false);
resp.setContentType("image/svg+xml");
// 告诉浏览器不要缓存
resp.setHeader("Pragma", "no-cache");
resp.setHeader("Cache-Control", "no-cache");
resp.setIntHeader("Expires", -1);
byte[] byteArr = svg.getBytes(encoding);
OutputStream outStream = resp.getOutputStream();
outStream.write(byteArr);
}
private void outputVml(WorkflowProcess process,String subProcessName,
String encoding,HttpServletRequest req,HttpServletResponse resp)
throws ServletException, IOException {
String contextPath = req.getContextPath();
if (contextPath==null)contextPath="";
String resourceServletPath = ClientWidgetBase.FIREFLOW_RESOURCE_SERVLET;
if (resourceServletPath==null) resourceServletPath="";
if (contextPath.endsWith("/") && resourceServletPath.startsWith("/")){
contextPath = contextPath.substring(0,contextPath.length()-1);
}
String subProcessId = process.getId()+WorkflowProcess.ID_SEPARATOR+subProcessName;
Diagram diagram = process.getDiagramBySubProcessId(subProcessId);
String vmlId = (diagram==null?"":diagram.getId());
StringBuffer vmlBuf = new StringBuffer();
vmlBuf.append("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">\n")
.append("<html xmlns:v=\"urn:schemas-microsoft-com:vml\">\n")
.append("<head>\n");
vmlBuf.append("<script src=\"")
.append(contextPath).append(resourceServletPath)
.append("/org/fireflow/clientwidget/resources/jquery-ui-1.10.3.custom/js/jquery-1.10.2.min.js\"></script>\n");
vmlBuf.append("<script language=\"JavaScript\">\n")
.append("var $ff = jQuery.noConflict(true);\n")
.append("</script>\n");
vmlBuf.append("<script src=\"")
.append(contextPath).append(resourceServletPath)
.append("/org/fireflow/webdesigner/resources/vml/FireflowVmlControl.js\"></script>\n");
vmlBuf.append("<STYLE>\n")
.append("v\\:Rect,v\\:RoundRect,v\\:imagedata,v\\:image ,v\\:oval { BEHAVIOR: url(#default#VML) ;display:inline-block; *display:inline; *zoom:1 }\n")
.append("v\\:Shape,v\\:shapetype,v\\:group ,v\\:background ,v\\:path,v\\:formulas ,v\\:f,v\\:handles ,v\\:fill, v\\:stroke,v\\:shadow,v\\:TextBox,v\\:textpath,v\\:line ,v\\:polyline ,v\\:curve ,v\\:arc { BEHAVIOR: url(#default#VML)}\n")
.append("</STYLE>\n");
vmlBuf.append("</head>\n");
vmlBuf.append("<body onload=\"fireflowDiagramInit('").append(vmlId).append("')\">\n");
/*
String xml = FpdlExporter.exportToVMLDiagram(process, subProcessName,
svgId,
resourceServletPath,
contextPath,encoding);
*/
/* */
FpdlDiagramSerializer ser = new FpdlDiagramSerializerVmlImpl();
ser.setResourcePathPrefix(contextPath+resourceServletPath);
String xml = ser.serializeDiagramToStr(process, subProcessName, encoding,true);
vmlBuf.append(xml);
vmlBuf.append("\n</body>\n</html>");
resp.setContentType("text/html");
// 告诉浏览器不要缓存
resp.setHeader("Pragma", "no-cache");
resp.setHeader("Cache-Control", "no-cache");
resp.setIntHeader("Expires", -1);
byte[] byteArr = vmlBuf.toString().getBytes(encoding);
OutputStream outStream = resp.getOutputStream();
outStream.write(byteArr);
}
}