source/mircoders/producer/PDFPreFormattingProducerNode.java

   1 /*
   2  * Copyright (C) 2001, 2002  The Mir-coders group
   3  *
   4  * This file is part of Mir.
   5  *
   6  * Mir is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Mir is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Mir; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * In addition, as a special exception, The Mir-coders gives permission to link
  21  * the code of this program with the com.oreilly.servlet library, any library
  22  * licensed under the Apache Software License, The Sun (tm) Java Advanced
  23  * Imaging library (JAI), The Sun JIMI library (or with modified versions of
  24  * the above that use the same license as the above), and distribute linked
  25  * combinations including the two.  You must obey the GNU General Public
  26  * License in all respects for all of the code used other than the above
  27  * mentioned libraries.  If you modify this file, you may extend this exception
  28  * to your version of the file, but you are not obligated to do so.  If you do
  29  * not wish to do so, delete this exception statement from your version.
  30  */
  31
  32 package mircoders.producer;
  33
  34 import java.util.*;
  35 import java.io.*;
  36 import mir.util.*;
  37 import mir.producer.*;
  38 import mir.entity.*;
  39 import mir.entity.adapter.*;
  40 import mircoders.entity.*;
  41 import mircoders.storage.*;
  42
  43 //because images are returned as a template model!(maybe not needed after all!)
  44 //import freemarker.template.*;
  45
  46
  47 public class PDFPreFormattingProducerNode implements ProducerNode {
  48   private String contentKey;
  49   private int numLinesBetweenImages;
  50   private float contentAreaWidthCM;
  51   private float characterWidthCM;
  52   private float pixelWidthCM;
  53   private float lineHeightCM;
  54
  55   public PDFPreFormattingProducerNode(String aContentKey,String someNumLinesBetweenImages,String aContentAreaWidthCM,String aCharacterWidthCM,String aPixelWidthCM,String aLineHeightCM) {
  56     contentKey = aContentKey;
  57     numLinesBetweenImages=(new Integer(someNumLinesBetweenImages)).intValue();
  58     contentAreaWidthCM=(new Float(aContentAreaWidthCM)).floatValue();
  59     characterWidthCM=(new Float(aCharacterWidthCM)).floatValue();
  60     pixelWidthCM=(new Float(aPixelWidthCM)).floatValue();
  61     lineHeightCM=(new Float(aLineHeightCM)).floatValue();
  62
  63     //    float characterWidthCM = 0.17F;
  64     //float contentAreaWidthCM = 16;
  65     //float pixelWidthCM = .03F;
  66     //float lineHeightCM = .5F;
  67   }
  68
  69   public void produce(Map aValueMap, String aVerb, PrintWriter aLogger) throws ProducerFailure {
  70     Object data;
  71     Entity entity;
  72
  73     try {
  74       data = ParameterExpander.findValueForKey( aValueMap, contentKey );
  75
  76       if (! (data instanceof EntityAdapter)) {
  77         throw new ProducerFailure("ContentMarkingProducerNode: value of '"+contentKey+"' is not an EntityAdapter, but an " + data.getClass().getName(), null);
  78       }
  79
  80       entity = ((EntityAdapter) data).getEntity();
  81       if (! (entity instanceof EntityContent)) {
  82         throw new ProducerFailure("ContentMarkingProducerNode: value of '"+contentKey+"' is not a content EntityAdapter, but a " + entity.getClass().getName() + " adapter", null);
  83       }
  84
  85       int currentPosition = 0;
  86
  87       //int numLinesBetweenImages=3;
  88
  89
  90
  91
  92       int numCharsInAnImagelessRow = (new Float(numLinesBetweenImages * (contentAreaWidthCM/characterWidthCM))).intValue();
  93
  94       boolean outOfText = false;
  95
  96       ArrayList brokenUpContent = new ArrayList();
  97
  98
  99       EntityList images=DatabaseContentToMedia.getInstance().getImages((EntityContent)entity);
 100       String theContent = ((EntityContent) entity).getValue("content_data");
 101       if (images == null){
 102           HashMap row = new HashMap();
 103           row.put("text",theContent);
 104           row.put("hasImage","0");
 105           brokenUpContent.add(row);
 106       }
 107       if (images != null){
 108           //need to add checks for out of content!
 109           HashMap row0 = new HashMap();
 110           if (numCharsInAnImagelessRow>(theContent).length()){
 111               row0.put("text",theContent);
 112               outOfText = true;
 113           }
 114           else {
 115               //break on words so we don't split html entities
 116               int lastSpaceAt = theContent.lastIndexOf(" ",numCharsInAnImagelessRow);
 117               row0.put("text",theContent.substring(0,lastSpaceAt));
 118               currentPosition=lastSpaceAt;
 119           }
 120           row0.put("hasImage","0");
 121           brokenUpContent.add(row0);
 122           aLogger.println("CP1 is "+ currentPosition);
 123           while(images.hasNext()){
 124               HashMap row1 = new HashMap();
 125               HashMap row2 = new HashMap();
 126               EntityImages currentImage=(EntityImages) images.next();
 127               float img_width=(new Float(currentImage.getValue("img_width"))).floatValue();
 128               float img_height=(new Float(currentImage.getValue("img_height"))).floatValue();
 129
 130               //oversize images must be shrunk
 131               if (img_width>400){
 132                   img_height=(new Float((new Float(img_height*(400.0F/img_width))).intValue())).floatValue();
 133                   img_width=400.0F;
 134               }
 135
 136
 137               //calculate how much text goes in the column
 138               float text_widthCM = contentAreaWidthCM-(img_width*pixelWidthCM);
 139               float number_of_lines = img_height*pixelWidthCM/lineHeightCM; //don't worry we will make it an int
 140               int text_amount= (new Float((text_widthCM/characterWidthCM)*number_of_lines)).intValue();
 141
 142               row1.put("text_widthCM",Float.toString(text_widthCM));
 143
 144
 145
 146               row1.put("img_width",Float.toString(img_width));
 147               row1.put("img_height",Float.toString(img_height));
 148
 149               aLogger.println("img_width " +Float.toString(img_width));
 150               aLogger.println("img_height "+Float.toString(img_height));
 151
 152               row1.put("img_src",currentImage.getValue("source"));
 153               row1.put("hasImage","1");
 154               if (! outOfText){
 155                   try {
 156                       int lastSpaceAt = theContent.lastIndexOf(" ",currentPosition+text_amount);
 157                       row1.put("text",theContent.substring(currentPosition,lastSpaceAt));
 158                       currentPosition=lastSpaceAt;
 159                   }
 160                   catch (IndexOutOfBoundsException e){
 161                       row1.put("text",theContent.substring(currentPosition));
 162                       outOfText = true;
 163                           }
 164               }
 165               aLogger.println("CP2 is "+ currentPosition);
 166               brokenUpContent.add(row1);
 167
 168               if (! outOfText){
 169                   try {
 170                       int lastSpaceAt = theContent.lastIndexOf(" ",currentPosition+numCharsInAnImagelessRow);
 171                       row2.put("text",theContent.substring(currentPosition,lastSpaceAt));
 172                       currentPosition=lastSpaceAt;
 173                   }
 174                   catch (IndexOutOfBoundsException e){
 175                       row2.put("text",theContent.substring(currentPosition));
 176                       outOfText = true;
 177                           }
 178               }
 179               row2.put("hasImage","0");
 180               brokenUpContent.add(row2);
 181
 182               aLogger.println("CP3 is "+ currentPosition);
 183           }
 184           HashMap row3 = new HashMap();
 185           if (! outOfText){
 186               row3.put("text",theContent.substring(currentPosition));
 187               row3.put("hasImage","0");
 188               brokenUpContent.add(row3);
 189           }
 190
 191       }
 192
 193
 194
 195
 196
 197       ParameterExpander.setValueForKey(
 198                                        aValueMap,
 199                                        "data.formatted_content",
 200                                        new CachingRewindableIterator(brokenUpContent.iterator())
 201                                        );
 202
 203
 204     }
 205     catch (Throwable t) {
 206       aLogger.println("Error while formatting content for PDF: " + t.getMessage());
 207       t.printStackTrace(aLogger);
 208
 209       throw new ProducerFailure(t.getMessage(), t);
 210     }
 211   }
 212
 213   public Set buildVerbSet() {
 214     return new HashSet();
 215   }
 216 }
 217
 218
 219
 220