449         } else {
 450             tabSize = getTabSize() * metrics.charWidth('m');
 451         }
 452     }
 453 
 454     // --- TabExpander methods ------------------------------------------
 455 
 456     /**
 457      * Returns the next tab stop position after a given reference position.
 458      * This implementation does not support things like centering so it
 459      * ignores the tabOffset argument.
 460      *
 461      * @param x the current position >= 0
 462      * @param tabOffset the position within the text stream
 463      *   that the tab occurred at >= 0.
 464      * @return the tab stop, measured in points >= 0
 465      */
 466     public float nextTabStop(float x, int tabOffset) {
 467         if (tabSize == 0)
 468             return x;
 469         float ntabs = (x - tabBase) / tabSize;
 470         return tabBase + ((ntabs + 1) * tabSize);
 471     }
 472 
 473 
 474     // --- View methods -------------------------------------
 475 
 476     /**
 477      * Renders using the given rendering surface and area
 478      * on that surface.  This is implemented to stash the
 479      * selection positions, selection colors, and font
 480      * metrics for the nested lines to use.
 481      *
 482      * @param g the rendering surface to use
 483      * @param a the allocated region to render into
 484      *
 485      * @see View#paint
 486      */
 487     public void paint(Graphics g, Shape a) {
 488         Rectangle alloc = (Rectangle) a;
 489         tabBase = alloc.x;

 449         } else {
 450             tabSize = getTabSize() * metrics.charWidth('m');
 451         }
 452     }
 453 
 454     // --- TabExpander methods ------------------------------------------
 455 
 456     /**
 457      * Returns the next tab stop position after a given reference position.
 458      * This implementation does not support things like centering so it
 459      * ignores the tabOffset argument.
 460      *
 461      * @param x the current position >= 0
 462      * @param tabOffset the position within the text stream
 463      *   that the tab occurred at >= 0.
 464      * @return the tab stop, measured in points >= 0
 465      */
 466     public float nextTabStop(float x, int tabOffset) {
 467         if (tabSize == 0)
 468             return x;
 469         int ntabs = (int) ((x - tabBase) / tabSize);
 470         return tabBase + ((ntabs + 1) * tabSize);
 471     }
 472 
 473 
 474     // --- View methods -------------------------------------
 475 
 476     /**
 477      * Renders using the given rendering surface and area
 478      * on that surface.  This is implemented to stash the
 479      * selection positions, selection colors, and font
 480      * metrics for the nested lines to use.
 481      *
 482      * @param g the rendering surface to use
 483      * @param a the allocated region to render into
 484      *
 485      * @see View#paint
 486      */
 487     public void paint(Graphics g, Shape a) {
 488         Rectangle alloc = (Rectangle) a;
 489         tabBase = alloc.x;