Example #1
1
 /**
  * Event.detail line start offset (input) Event.text line text (input) LineStyleEvent.styles
  * Enumeration of StyleRanges, need to be in order. (output) LineStyleEvent.background line
  * background color (output)
  */
 public void lineGetStyle(LineStyleEvent event) {
   Vector styles = new Vector();
   int token;
   StyleRange lastStyle;
   // If the line is part of a block comment, create one style for the entire line.
   if (inBlockComment(event.lineOffset, event.lineOffset + event.lineText.length())) {
     styles.addElement(
         new StyleRange(event.lineOffset, event.lineText.length(), getColor(COMMENT), null));
     event.styles = new StyleRange[styles.size()];
     styles.copyInto(event.styles);
     return;
   }
   Color defaultFgColor = ((Control) event.widget).getForeground();
   scanner.setRange(event.lineText);
   token = scanner.nextToken();
   while (token != EOF) {
     if (token == OTHER) {
       // do nothing for non-colored tokens
     } else if (token != WHITE) {
       Color color = getColor(token);
       // Only create a style if the token color is different than the
       // widget's default foreground color and the token's style is not
       // bold.  Keywords are bolded.
       if ((!color.equals(defaultFgColor)) || (token == KEY)) {
         StyleRange style =
             new StyleRange(
                 scanner.getStartOffset() + event.lineOffset, scanner.getLength(), color, null);
         if (token == KEY) {
           style.fontStyle = SWT.BOLD;
         }
         if (styles.isEmpty()) {
           styles.addElement(style);
         } else {
           // Merge similar styles.  Doing so will improve performance.
           lastStyle = (StyleRange) styles.lastElement();
           if (lastStyle.similarTo(style) && (lastStyle.start + lastStyle.length == style.start)) {
             lastStyle.length += style.length;
           } else {
             styles.addElement(style);
           }
         }
       }
     } else if ((!styles.isEmpty())
         && ((lastStyle = (StyleRange) styles.lastElement()).fontStyle == SWT.BOLD)) {
       int start = scanner.getStartOffset() + event.lineOffset;
       lastStyle = (StyleRange) styles.lastElement();
       // A font style of SWT.BOLD implies that the last style
       // represents a java keyword.
       if (lastStyle.start + lastStyle.length == start) {
         // Have the white space take on the style before it to
         // minimize the number of style ranges created and the
         // number of font style changes during rendering.
         lastStyle.length += scanner.getLength();
       }
     }
     token = scanner.nextToken();
   }
   event.styles = new StyleRange[styles.size()];
   styles.copyInto(event.styles);
 }
Example #2
0
  public void parseBlockComments(String text) {
    blockComments = new Vector();
    StringReader buffer = new StringReader(text);
    int ch;
    boolean blkComment = false;
    int cnt = 0;
    int[] offsets = new int[2];
    boolean done = false;

    try {
      while (!done) {
        switch (ch = buffer.read()) {
          case -1:
            {
              if (blkComment) {
                offsets[1] = cnt;
                blockComments.addElement(offsets);
              }
              done = true;
              break;
            }
          case '/':
            {
              ch = buffer.read();
              if ((ch == '*') && (!blkComment)) {
                offsets = new int[2];
                offsets[0] = cnt;
                blkComment = true;
                cnt++;
              } else {
                cnt++;
              }
              cnt++;
              break;
            }
          case '*':
            {
              if (blkComment) {
                ch = buffer.read();
                cnt++;
                if (ch == '/') {
                  blkComment = false;
                  offsets[1] = cnt;
                  blockComments.addElement(offsets);
                }
              }
              cnt++;
              break;
            }
          default:
            {
              cnt++;
              break;
            }
        }
      }
    } catch (IOException e) {
      // ignore errors
    }
  }
Example #3
0
 boolean inBlockComment(int start, int end) {
   for (int i = 0; i < blockComments.size(); i++) {
     int[] offsets = (int[]) blockComments.elementAt(i);
     // start of comment in the line
     if ((offsets[0] >= start) && (offsets[0] <= end)) return true;
     // end of comment in the line
     if ((offsets[1] >= start) && (offsets[1] <= end)) return true;
     if ((offsets[0] <= start) && (offsets[1] >= end)) return true;
   }
   return false;
 }