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

   1 package eu.svjatoslav.sixth.core.document;
   2
   3 import eu.svjatoslav.commons.string.String2;
   4 import eu.svjatoslav.commons.string.tokenizer.InvalidSyntaxException;
   5 import eu.svjatoslav.commons.string.tokenizer.Tokenizer;
   6 import eu.svjatoslav.commons.string.tokenizer.TokenizerMatch;
   7 import eu.svjatoslav.sixth.core.document.text.FormattedText;
   8
   9 import static eu.svjatoslav.commons.string.tokenizer.Terminator.TerminationStrategy.DROP;
  10 import static eu.svjatoslav.commons.string.tokenizer.Terminator.TerminationStrategy.PRESERVE;
  11 import static eu.svjatoslav.sixth.core.document.Helper.*;
  12 import static eu.svjatoslav.sixth.core.document.text.FormattedText.fromOrg;
  13
  14 public class Document {
  15     public final Heading rootHeading = new Heading( null , 0, null);
  16     private Heading currentHeading = rootHeading;
  17
  18     public Heading createHeading(FormattedText name, int targetLevel){
  19         if (currentHeading.level == (targetLevel - 1)){
  20             Heading newHeading = new Heading(name, targetLevel, currentHeading);
  21             currentHeading.addChild(newHeading);
  22             currentHeading = newHeading;
  23             return newHeading;
  24         }
  25
  26         if (currentHeading.level > (targetLevel - 1)){
  27             currentHeading = currentHeading.parent;
  28             return createHeading(name, targetLevel);
  29         }
  30
  31         try {
  32             Heading missingIntermediate = new Heading(fromOrg("<noname>"), currentHeading.level + 1, currentHeading);
  33             currentHeading.addChild(missingIntermediate);
  34             currentHeading = missingIntermediate;
  35             return createHeading(name, targetLevel);
  36         } catch (InvalidSyntaxException e) {
  37             throw new IllegalStateException("impossible situation");
  38         }
  39     }
  40
  41     public Heading getCurrentHeading(){
  42         return currentHeading;
  43     }
  44
  45     private void parseHeading(TokenizerMatch token) throws InvalidSyntaxException {
  46         // expected sample heading:
  47         // ***** test heading
  48
  49         String[] headingSections = String2.getGroups(token.token, "(\\*+)[ \\t](.*)\\r?\\n");
  50         int level = headingSections[0].length();
  51         String title = headingSections[1];
  52         createHeading(fromOrg(title), level);
  53     }
  54
  55     public void parse(String fileContentsAsString) throws InvalidSyntaxException {
  56         final Tokenizer tokenizer = new Tokenizer(fileContentsAsString);
  57
  58         // Org heading:
  59         // "*** Example Heading 1234"
  60         tokenizer.addTerminator(PRESERVE, "\\*+[ \\t].*\\r?\\n", TG_HEADING);
  61
  62         // Org list. Examples:
  63         // "   + my list title"
  64         // "   - my list title"
  65         tokenizer.addTerminator(PRESERVE, "[ \\t]*(\\+|-)([ \\t].*)?\\r?\\n", TG_LIST);
  66
  67         // "   * my list title"
  68         tokenizer.addTerminator(PRESERVE, "[ \\t]+\\*([ \\t].*)?\\r?\\n", TG_LIST);
  69
  70         // DocumentProperty:
  71         // "#+OPTIONS: H:20 num:20"
  72         tokenizer.addTerminator(PRESERVE, "#\\+.+:.*\\r?\\n", TG_DOCUMENT_PROPERTY);
  73
  74         // newline
  75         tokenizer.addTerminator(DROP,"\\r?\\n", TG_NEWLINE);
  76
  77
  78         while (tokenizer.hasMoreContent()) {
  79             final TokenizerMatch tm = tokenizer.getNextToken();
  80
  81             if (tm.isGroup(TG_HEADING)){
  82                 parseHeading(tm);
  83                 continue;
  84             }
  85
  86             tokenizer.unreadToken();
  87             currentHeading.parse(tokenizer);
  88         }
  89
  90     }
  91 }