示例#1
0
  /**
   * This is called by the nested wrapped line views to determine the break location. This can be
   * reimplemented to alter the breaking behavior. It will either break at word or character
   * boundaries depending upon the break argument given at construction.
   */
  protected int calculateBreakPosition(int p0, Token tokenList, float x0) {
    // System.err.println("------ beginning calculateBreakPosition() --------");
    int p = p0;
    RSyntaxTextArea textArea = (RSyntaxTextArea) getContainer();
    float currentWidth = getWidth();
    if (currentWidth == Integer.MAX_VALUE) currentWidth = getPreferredSpan(X_AXIS);
    // Make sure width>0; this is a huge hack to fix a bug where
    // loading text into an RTextArea before it is visible if word wrap
    // is enabled causes an infinite loop in calculateBreakPosition()
    // because of the 0-width!  We cannot simply check in setSize()
    // because the width is set to 0 somewhere else too somehow...
    currentWidth = Math.max(currentWidth, MIN_WIDTH);
    Token t = tokenList;
    while (t != null && t.isPaintable()) {
      // FIXME:  Replace the code below with the commented-out line below.  This will
      // allow long tokens to be broken at embedded spaces (such as MLC's).  But it
      // currently throws BadLocationExceptions sometimes...
      float tokenWidth = t.getWidth(textArea, this, x0);
      if (tokenWidth > currentWidth) {
        // If the current token alone is too long for this line,
        // break at a character boundary.
        if (p == p0) {
          return t.getOffsetBeforeX(textArea, this, 0, currentWidth);
        }
        // Return the first non-whitespace char (i.e., don't start
        // off the continuation of a wrapped line with whitespace).
        return t.isWhitespace() ? p + t.length() : p;
        // return getBreakLocation(t, fm, x0, currentWidth, this);
      }
      currentWidth -= tokenWidth;
      x0 += tokenWidth;
      p += t.length();
      // System.err.println("*** *** *** token fit entirely (width==" + tokenWidth + "), adding " +
      // t.textCount + " to p, now p==" + p);
      t = t.getNextToken();
    }
    // System.err.println("... ... whole line fits; returning p==" + p);
    // System.err.println("------ ending calculateBreakPosition() --------");

    //		return p;
    return p + 1;
  }