bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/parsing/declarations/DDocumentationAst.java

   1 package org.simantics.scl.compiler.internal.parsing.declarations;
   2
   3
   4 public class DDocumentationAst extends DeclarationAst {
   5     public final String documentation;
   6
   7     public DDocumentationAst(String documentation) {
   8         this.documentation = cleanUp(documentation);
   9     }
  10
  11     @Override
  12     public void toString(int indentation, StringBuilder b) {
  13         for(int i=0;i<indentation;++i) b.append("    ");
  14         b.append("\"\"\"\n");
  15         b.append(documentation);
  16         b.append("\"\"\"\n");
  17
  18     }
  19
  20     private static String cleanUp(String documentation) {
  21         // Remove empty lines
  22         int end = documentation.length();
  23         while(end > 0) {
  24             char c = documentation.charAt(end-1);
  25             if(c != ' ' && c != '\n')
  26                 break;
  27             --end;
  28         }
  29
  30         int begin = 0;
  31         for(int i=0;i<end;++i) {
  32             char c = documentation.charAt(i);
  33             if(c == '\n')
  34                 begin = i+1;
  35             else if(c != ' ')
  36                 break;
  37         }
  38
  39         // Calculate common indentation
  40         int lineStart = begin;
  41         int commonIndentation = Integer.MAX_VALUE;
  42         for(int i=begin;i<end;++i) {
  43             char c = documentation.charAt(i);
  44             if(c == '\n') {
  45                 lineStart = i+1;
  46             }
  47             else if(lineStart >= 0 && c != ' ') {
  48                 int indentation = i - lineStart;
  49                 commonIndentation = Math.min(commonIndentation, indentation);
  50                 if(commonIndentation == 0) {
  51                     if(begin == 0 && end == documentation.length())
  52                         return documentation;
  53                     else
  54                         return documentation.substring(begin, end);
  55                 }
  56                 lineStart = -1;
  57             }
  58         }
  59
  60         // Remove common indentation
  61         StringBuilder result = new StringBuilder();
  62         int charsToSkip = commonIndentation;
  63         for(int i=begin;i<end;++i) {
  64             char c = documentation.charAt(i);
  65             if(c == '\n') {
  66                 result.append(c);
  67                 charsToSkip = commonIndentation;
  68                 continue;
  69             }
  70             if(charsToSkip > 0)
  71                 --charsToSkip;
  72             else
  73                 result.append(c);
  74         }
  75         return result.toString();
  76     }
  77 }