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