imageMode


1   /*  $Id: imageMode.java,v 1.7 2001/04/25 22:17:15 agarcia3 Exp $ 
2       webEditor. The new way in content management
3       Copyright (C) 2001  Alfredo Garcia
4   
5       This program is free software; you can redistribute it and/or modify
6       it under the terms of the GNU General Public License as published by
7       the Free Software Foundation.
8   
9       This program is distributed in the hope that it will be useful,
10      but WITHOUT ANY WARRANTY; without even the implied warranty of
11      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12      GNU General Public License for more details.
13  */
14  
15  package webEditor.interfaces;
16  
17  import java.io.*;
18  import java.util.Hashtable  ;
19  import java.lang.reflect.*;
20  
21  import javax.servlet.*;
22  import javax.servlet.http.*;
23  import org.w3c.dom.*;
24  
25  import webEditor.core.*;
26  
27  /**
28   * Image interface; This class manage the associated images edition
29   * @author <a HREF="mailto:agarcia@mundofree.com">Alfredo Garcia</a>
30   */
31  
32  public class imageMode {
33  
34     /**
35      * Initial configuration values 
36      */
37     private configuration initValues;
38  
39     /**
40      * Name of the document to edit
41      */
42     private String   myDocName;
43  
44     /**
45      * Presentation management
46      */
47     private presentation myEditor= null;
48  
49     /**
50      * Images management
51      */
52     private images myImage= null;
53  
54     /**
55      * Articles management
56      */
57     private article myDocument= null;
58  
59     /**
60      * Class constructor
61      * @param initParam      Initial values
62      */
63      public imageMode (configuration initParam) { 
64          // We are going to use the values in the hash table when we
65      // create another kind of core object
66      this.initValues = initParam;
67      }
68      
69     /**
70      * Interface for the edition operations
71      * @param request        HTTP request
72      * @param out        Servlet Output
73      * @return void
74      */ 
75      public void edition (HttpServletRequest request, PrintWriter out) 
76      throws ServletException, 
77             IOException {
78  
79          String   outputString = null;
80      this.myEditor = new presentation (this.initValues);
81      this.myDocument = new article (this.initValues);
82      this.myImage = new images (this.initValues);
83  
84      this.myDocName = this.initValues.readValue("HTTP Parameters", "docID");
85      String   opCode = this.initValues.readValue ("HTTP Parameters", "code");
86      
87      if (this.myDocName == null) {
88          // We are editing a new document
89          this.myDocName = "document.xml";
90      }
91      // We check the 'Write' param (it's an image form component)
92      String   imgWrite = this.initValues.readValue 
93                  ("HTTP Parameters", "Write.x");
94      if (imgWrite != null)  {
95          opCode = "Write";   
96      }
97  
98      if (opCode != null) {
99  try { 
100     // We use reflection to invoque the proper method
101     Method m = getClass().getMethod(opCode, new Class  [0]); 
102     m.invoke(this,new Object  [0]); 
103 } 
104 catch (Exception   e) { 
105     out.println (opCode + " : Code not supported");
106     e.printStackTrace();
107 } 
108     }
109 
110     Document doc = this.myDocument.docRead (this.myDocName);
111     Document imgDoc = this.myDocument.readSubtree (doc, "image");
112     if  (imgDoc == null) {
113         // The article doesn't have any image, so we read the 
114         // "plain" image template
115         imgDoc = this.myDocument.docRead ("image.xml");
116     }
117     imgDoc = this.myImage.changeDocID (imgDoc, this.myDocName);
118     outputString = this.myEditor.showImgEditor (imgDoc , "");
119 
120     out.println (outputString);
121     }
122 
123    /**
124     * Modifies the given image
125     * @return void
126     */
127     public void Write ()
128     throws ServletException, IOException 
129     {
130     Document doc = this.myDocument.docRead (this.myDocName);
131 
132     // We load into the config hash the http parameters
133     Hashtable   http_params = this.initValues.readCategory ("HTTP Parameters");
134     Document imageTemplate = this.myDocument.docRead ("image.xml");
135     // And then, we write the new http values ...
136     imageTemplate = this.myDocument.writeDoc (http_params, imageTemplate, "image_content");
137 
138     imageTemplate = this.myImage.changeDocID (imageTemplate, this.myDocName);
139     // With this we move the physical image file to the article directory
140     String   imagePath = this.myImage.writeImage (this.myDocName);
141     if ( imagePath != null ) {
142         imageTemplate = this.myImage.changeImageURL (imageTemplate, imagePath);
143     }
144     else {
145         imagePath = this.myImage.getImageURL (doc);
146         if (imagePath != null) {
147             //we try to restore the original image
148             imageTemplate = this.myImage.changeImageURL (imageTemplate, imagePath);
149         }
150     }
151 
152     // Insert the new document into the article structure
153     String   position = this.myImage.getImagePosition (imageTemplate);
154         
155     // Before inserting the image, we delete the previous image instances
156     String   imagePosition = this.initValues.readValue 
157                         ("HTTP Parameters", "position").trim();
158     if ( (!imagePosition.equals("")) && (!position.equals (imagePosition)) ) {
159         doc = this.myDocument.deleteImgDoc (doc, imagePosition);
160     }
161         
162     if ( !position.trim().equals("") ) {
163         // If imagePosition is empty, means that you try to insert a image without position
164         doc = this.myDocument.writeImgDoc (imageTemplate, doc, position);
165         this.myDocument.saveFile (this.myDocName, doc);
166     }
167     }
168 
169    /**
170     * Deletes the given image
171     * @return void
172     */
173     public void delete ()
174     throws ServletException, IOException 
175     {
176     String   imagePosition = this.initValues.readValue 
177                 ("HTTP Parameters", "position").trim();
178     if ( !imagePosition.equals("") ) {
179         Document doc = this.myDocument.docRead (this.myDocName);
180         doc = this.myDocument.deleteImgDoc (doc, imagePosition);
181         this.myDocument.saveFile (this.myDocName, doc);
182     }
183 
184     }
185 
186 }
187
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