IsindexView


1   /*
2    * @(#)IsindexView.java 1.11 03/12/19
3    *
4    * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   package javax.swing.text.html;
8   
9   import java.awt.*;
10  import java.awt.event.*;
11  import java.net.URLEncoder  ;
12  import java.net.MalformedURLException  ;
13  import java.io.IOException  ;
14  import java.net.URL  ;
15  import javax.swing.text.*;
16  import javax.swing.*;
17  
18  
19  /**
20   * A view that supports the &lt;ISINDEX&lt; tag.  This is implemented
21   * as a JPanel that contains 
22   *
23   * @author Sunita Mani
24   * @version 1.11, 12/19/03
25   */
26  
27  class IsindexView extends ComponentView implements ActionListener {
28   
29      JTextField textField;
30  
31      /**
32       * Creates an IsindexView
33       */
34      public IsindexView(Element elem) {
35      super(elem);
36      }
37  
38      /**
39       * Creates the components necessary to to implement
40       * this view.  The component returned is a <code>JPanel</code>,
41       * that contains the PROMPT to the left and <code>JTextField</code>
42       * to the right.
43       */
44      public Component createComponent() {
45      AttributeSet attr = getElement().getAttributes();
46      
47      JPanel panel = new JPanel(new BorderLayout());
48      panel.setBackground(null);
49      
50      String   prompt = (String  )attr.getAttribute(HTML.Attribute.PROMPT);
51      if (prompt == null) {
52              prompt = UIManager.getString("IsindexView.prompt");
53      }
54      JLabel label = new JLabel(prompt);
55  
56      textField = new JTextField();
57      textField.addActionListener(this);
58      panel.add(label, BorderLayout.WEST);
59      panel.add(textField, BorderLayout.CENTER);
60      panel.setAlignmentY(1.0f);
61      panel.setOpaque(false);
62      return panel;
63      }
64  
65      /**
66       * Responsible for processing the ActionEvent.
67       * In this case this is hitting enter/return
68       * in the text field.  This will construct the
69       * URL from the base URL of the document.
70       * To the URL is appended a '?' followed by the
71       * contents of the JTextField.  The search 
72       * contents are URLEncoded.
73       */
74      public void actionPerformed(ActionEvent evt) {
75  
76      String   data = textField.getText();
77      if (data != null) {
78          data = URLEncoder.encode(data);
79      }
80  
81  
82      AttributeSet attr = getElement().getAttributes();
83      HTMLDocument   hdoc = (HTMLDocument  )getElement().getDocument();
84  
85      String   action = (String  ) attr.getAttribute(HTML.Attribute.ACTION);
86      if (action == null) {
87          action = hdoc.getBase().toString();
88      }
89      try {
90          URL   url = new URL  (action+"?"+data);
91          JEditorPane pane = (JEditorPane)getContainer();
92          pane.setPage(url);
93      } catch (MalformedURLException   e1) {
94      } catch (IOException   e2) {
95      }
96      }
97  }
98
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