Cre@te Online 2000 December/Cre@teOnline CD05.iso/MacSoft/XML Instance.sea/XML Instance/Required/plugins/HTMLWindow.jar/horst/FormProcessor.class

Java Class File | 2000-03-18 | 6.1 KB | 173 lines

package horst;

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.Enumeration;
import java.util.EventObject;
import java.util.Hashtable;
import java.util.Vector;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JTextField;

public class FormProcessor implements ActionListener, KeyListener {
   Vector m_comps = new Vector();
   Vector m_submits = new Vector();
   Hashtable m_atts;
   HTMLPane m_renderer;

   public FormProcessor(HTMLPane renderer, Hashtable atts) {
      this.m_renderer = renderer;
      this.m_atts = atts;
   }

   public void actionPerformed(ActionEvent e) {
      Object src = ((EventObject)e).getSource();
      if (src instanceof JButton) {
         JButton btn = (JButton)src;
         String method = (String)this.m_atts.get("method");
         String action = (String)this.m_atts.get("action");
         if (action != null) {
            String formString = this.getFormString();
            if (method != null && method.equalsIgnoreCase("POST")) {
               URL u = Utilities.getURL(action);
               if (u != null) {
                  try {
                     URLConnection conn = u.openConnection();
                     conn.setDoInput(true);
                     conn.setDoOutput(true);
                     conn.setUseCaches(false);
                     conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                     DataOutputStream printout = new DataOutputStream(conn.getOutputStream());
                     printout.writeBytes(formString);
                     ((FilterOutputStream)printout).close();
                     DataInputStream input = new DataInputStream(conn.getInputStream());
                     InputStreamReader reader = new InputStreamReader(input);
                     this.m_renderer.openPage(reader, u);
                  } catch (IOException var12) {
                  }
               }
            } else {
               formString = "?" + formString;
               URL u = Utilities.getURL(action + formString);
               if (u == null && this.m_renderer != null) {
                  u = Utilities.getURL(this.m_renderer.getDocument().getBaseURL(), action + formString);
               }

               this.m_renderer.openPage(u);
            }
         }
      }

   }

   void addComponent(Element e) {
      this.m_comps.addElement(e);
      Component c = (Component)e.getAttribute("component");
      String type = (String)e.getAttribute("type");
      if (type != null && (type.equalsIgnoreCase("submit") || type.equalsIgnoreCase("image")) && c != null && c instanceof JButton) {
         this.m_submits.addElement(c);
         ((JButton)c).addActionListener(this);
      }

      if (c instanceof JTextField) {
         ((JTextField)c).addKeyListener(this);
      }

   }

   Hashtable getComponentAttributes(Component c) {
      Enumeration e = this.m_comps.elements();

      while(e.hasMoreElements()) {
         Element e1 = (Element)e.nextElement();
         Component c1 = (Component)e1.getAttribute("component");
         if (c1 == c) {
            return e1.getAttributes();
         }
      }

      return null;
   }

   public Vector getComponents() {
      return this.m_comps;
   }

   public Hashtable getFormAttributes() {
      return this.m_atts;
   }

   String getFormString() {
      String str = "";
      int nCount = 0;
      Enumeration e = this.m_comps.elements();

      while(e.hasMoreElements()) {
         Element e1 = (Element)e.nextElement();
         Component c1 = (Component)e1.getAttribute("component");
         if (c1 == null || !this.m_submits.contains(c1)) {
            String type = (String)e1.getAttribute("type");
            String name = (String)e1.getAttribute("name");
            String value = "";
            if (c1 != null && c1 instanceof JTextField) {
               value = ((JTextField)c1).getText();
            } else if (c1 instanceof JComboBox) {
               DefaultComboBoxModel model = (DefaultComboBoxModel)((JComboBox)c1).getModel();
               ComboBoxItem item = (ComboBoxItem)model.getSelectedItem();
               if (item != null) {
                  value = (String)item.m_atts.get("value");
               }
            } else {
               value = (String)e1.getAttribute("value");
            }

            if (value != null && name != null) {
               value = URLEncoder.encode(value);
               if (nCount++ == 0) {
                  str = str + name + "=" + value;
               } else {
                  str = str + "&" + name + "=" + value;
               }
            }
         }
      }

      return str;
   }

   public void keyPressed(KeyEvent e) {
   }

   public void keyReleased(KeyEvent e) {
      if (e.getKeyCode() == 10) {
         String action = (String)this.m_atts.get("action");
         if (action != null) {
            String formString = this.getFormString();
            URL u = Utilities.getURL(action + formString);
            if (u == null && this.m_renderer != null) {
               u = Utilities.getURL(this.m_renderer.getDocument().getBaseURL(), action + formString);
            }

            this.m_renderer.openPage(u);
         }
      }

   }

   public void keyTyped(KeyEvent e) {
   }
}