Example #1
0
 // ------------------------------
 public void
     scrollToCaret() { // not called - fixed with putting visible scrollbars on JScrollPane
   //
   Rectangle rect1 = scroller1.getViewport().getViewRect();
   double x1 = rect1.getX();
   double y1 = rect1.getY();
   double r1height = rect1.getHeight();
   double r1width = rect1.getWidth();
   Caret caret1 = editor1.getCaret();
   Point pt2 = caret1.getMagicCaretPosition(); // the end of the string
   double x2 = pt2.getX();
   double y2 = pt2.getY();
   if (((x2 > x1) && (x2 < (x1 + r1width))) && ((y2 > y1) && (y2 < (y1 + r1height)))) {
     // inview
   } else {
     double newheight = r1height / 2;
     double newwidth = r1width / 2;
     double x3 = pt2.getX() - newwidth;
     double y3 = pt2.getY() - newheight;
     if (x3 < 0) x3 = 0;
     if (y3 < 0) y3 = 0;
     Rectangle rect3 = new Rectangle((int) x3, (int) y3, (int) newwidth, (int) newheight);
     editor1.scrollRectToVisible(rect3);
   }
 } // end scrollToCaret
  /**
   * Provides a way to determine the next visually represented model location at which one might
   * place a caret. Some views may not be visible, they might not be in the same order found in the
   * model, or they just might not allow access to some of the locations in the model.
   *
   * <p>NOTE: You should only call this method if the passed-in <code>javax.swing.text.View</code>
   * is an instance of {@link TokenOrientedView} and <code>javax.swing.text.TabExpander</code>;
   * otherwise, a <code>ClassCastException</code> could be thrown.
   *
   * @param pos the position to convert >= 0
   * @param a the allocated region in which to render
   * @param direction the direction from the current position that can be thought of as the arrow
   *     keys typically found on a keyboard. This will be one of the following values:
   *     <ul>
   *       <li>SwingConstants.WEST
   *       <li>SwingConstants.EAST
   *       <li>SwingConstants.NORTH
   *       <li>SwingConstants.SOUTH
   *     </ul>
   *
   * @return the location within the model that best represents the next location visual position
   * @exception BadLocationException
   * @exception IllegalArgumentException if <code>direction</code> doesn't have one of the legal
   *     values above
   */
  public static int getNextVisualPositionFrom(
      int pos, Position.Bias b, Shape a, int direction, Position.Bias[] biasRet, View view)
      throws BadLocationException {

    biasRet[0] = Position.Bias.Forward;

    // Do we want the "next position" above, below, to the left or right?
    switch (direction) {
      case NORTH:
      case SOUTH:
        if (pos == -1) {
          pos = (direction == NORTH) ? Math.max(0, view.getEndOffset() - 1) : view.getStartOffset();
          break;
        }
        RSyntaxTextArea target = (RSyntaxTextArea) view.getContainer();
        Caret c = (target != null) ? target.getCaret() : null;
        // YECK! Ideally, the x location from the magic caret
        // position would be passed in.
        Point mcp;
        if (c != null) mcp = c.getMagicCaretPosition();
        else mcp = null;
        int x;
        if (mcp == null) {
          Rectangle loc = target.modelToView(pos);
          x = (loc == null) ? 0 : loc.x;
        } else {
          x = mcp.x;
        }
        if (direction == NORTH) pos = getPositionAbove(target, pos, x, (TabExpander) view);
        else pos = getPositionBelow(target, pos, x, (TabExpander) view);
        break;

      case WEST:
        if (pos == -1) pos = Math.max(0, view.getEndOffset() - 1);
        else pos = Math.max(0, pos - 1);
        break;

      case EAST:
        if (pos == -1) pos = view.getStartOffset();
        else pos = Math.min(pos + 1, view.getDocument().getLength());
        break;

      default:
        throw new IllegalArgumentException("Bad direction: " + direction);
    }

    return pos;
  }
Example #3
0
    @Override
    public void actionPerformed(ActionEvent e) {
      JTextComponent textArea = (JTextComponent) e.getSource();

      Caret caret = textArea.getCaret();
      int dot = caret.getDot();

      /*
       * Move to the beginning/end of selection on a "non-shifted"
       * left- or right-keypress.  We shouldn't have to worry about
       * navigation filters as, if one is being used, it let us get
       * to that position before.
       */
      if (!select) {
        switch (direction) {
          case SwingConstants.EAST:
            int mark = caret.getMark();
            if (dot != mark) {
              caret.setDot(Math.max(dot, mark));
              return;
            }
            break;
          case SwingConstants.WEST:
            mark = caret.getMark();
            if (dot != mark) {
              caret.setDot(Math.min(dot, mark));
              return;
            }
            break;
          default:
        }
      }

      Position.Bias[] bias = new Position.Bias[1];
      Point magicPosition = caret.getMagicCaretPosition();

      try {

        if (magicPosition == null
            && (direction == SwingConstants.NORTH || direction == SwingConstants.SOUTH)) {
          Rectangle r = textArea.modelToView(dot);
          magicPosition = new Point(r.x, r.y);
        }

        NavigationFilter filter = textArea.getNavigationFilter();

        if (filter != null) {
          dot =
              filter.getNextVisualPositionFrom(
                  textArea, dot, Position.Bias.Forward, direction, bias);
        } else {
          if (direction == SwingConstants.NORTH || direction == SwingConstants.SOUTH) {
            dot = getNSVisualPosition((EditorPane) textArea, dot, direction);
          } else {
            dot =
                textArea
                    .getUI()
                    .getNextVisualPositionFrom(
                        textArea, dot, Position.Bias.Forward, direction, bias);
          }
        }
        if (select) {
          caret.moveDot(dot);
        } else {
          caret.setDot(dot);
        }

        if (magicPosition != null
            && (direction == SwingConstants.NORTH || direction == SwingConstants.SOUTH)) {
          caret.setMagicCaretPosition(magicPosition);
        }

      } catch (BadLocationException ble) {
        Debug.error(me + "Problem while trying to move caret\n%s", ble.getMessage());
      }
    }