src/main/java/eu/svjatoslav/sixth/core/document/Document.java

   1 package eu.svjatoslav.sixth.core.document;
   2
   3 import eu.svjatoslav.commons.string.tokenizer.InvalidSyntaxException;
   4 import eu.svjatoslav.commons.string.tokenizer.Tokenizer;
   5 import eu.svjatoslav.commons.string.tokenizer.TokenizerMatch;
   6 import eu.svjatoslav.sixth.core.document.text.FormattedText;
   7
   8 import static eu.svjatoslav.commons.string.tokenizer.Terminator.TerminationStrategy.DROP;
   9 import static eu.svjatoslav.commons.string.tokenizer.Terminator.TerminationStrategy.PRESERVE;
  10 import static eu.svjatoslav.sixth.core.document.Helper.*;
  11 import static eu.svjatoslav.sixth.core.document.text.FormattedText.fromOrg;
  12
  13 public class Document {
  14     public final Heading rootHeading = new Heading( null , 0, null);
  15     private Heading currentHeading = rootHeading;
  16
  17     public Heading createHeading(FormattedText name, int targetLevel){
  18         if (currentHeading.level == (targetLevel - 1)){
  19             Heading newHeading = new Heading(name, targetLevel, currentHeading);
  20             currentHeading.addChild(newHeading);
  21             currentHeading = newHeading;
  22             return newHeading;
  23         }
  24
  25         if (currentHeading.level > (targetLevel - 1)){
  26             currentHeading = currentHeading.parent;
  27             return createHeading(name, targetLevel);
  28         }
  29
  30         Heading missingIntermediate = new Heading(fromOrg("<noname>"), currentHeading.level + 1, currentHeading);
  31         currentHeading.addChild(missingIntermediate);
  32         currentHeading = missingIntermediate;
  33         return createHeading(name, targetLevel);
  34     }
  35
  36     public Heading getCurrentHeading(){
  37         return currentHeading;
  38     }
  39
  40     private void parseHeading(TokenizerMatch token) throws InvalidSyntaxException {
  41         String[] headingSections = token.getRegExpGroups();
  42         int level = headingSections[0].length();
  43         String title = headingSections[1];
  44         createHeading(fromOrg(title), level);
  45     }
  46
  47     public void parse(String fileContentsAsString) throws InvalidSyntaxException {
  48         final Tokenizer tokenizer = new Tokenizer(fileContentsAsString);
  49
  50         // Org heading:
  51         // "*** Example Heading 1234"
  52         tokenizer.addTerminator(PRESERVE, "(\\*+)[ \\t](.*)\\r?\\n", TG_HEADING);
  53
  54         // Org list. Examples:
  55         // "   + my list title"
  56         // "   - my list title"
  57         tokenizer.addTerminator(PRESERVE, "([ \\t]*)(\\+|-)[ \\t]?(.*)?\\r?\\n", TG_LIST);
  58
  59         // "   * my list title"
  60         tokenizer.addTerminator(PRESERVE, "([ \\t]+)(\\*)[ \\t]?(.*)?\\r?\\n", TG_LIST);
  61
  62         // DocumentProperty:
  63         // "#+OPTIONS: H:20 num:20"
  64         tokenizer.addTerminator(PRESERVE, "#\\+.+:.*\\r?\\n", TG_DOCUMENT_PROPERTY);
  65
  66         // newline
  67         tokenizer.addTerminator(DROP,"\\r?\\n", TG_NEWLINE);
  68
  69
  70         while (tokenizer.hasMoreContent()) {
  71             final TokenizerMatch tm = tokenizer.getNextToken();
  72
  73             if (tm.isGroup(TG_HEADING)){
  74                 parseHeading(tm);
  75                 continue;
  76             }
  77
  78             currentHeading.parse(tm);
  79         }
  80
  81     }
  82 }