am 80018c88: Properly reserve display space for non-digits

                            // we switch to scientific notation with positive exponent.

    private static final int SCI_NOTATION_EXTRA = 1;

                            // Extra digits for standard scientific notation.  In this case we

                            // have a deecimal point and no ellipsis.

                            // have a decimal point and no ellipsis.

                            // We assume that we do not drop digits to make room for the decimal

                            // point in ordinary scientific notation. Thus >= 1.

    private ActionMode mActionMode;

    private final ForegroundColorSpan mExponentColorSpan;

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        final TextPaint paint = getPaint();

        final int newWidthConstraint = MeasureSpec.getSize(widthMeasureSpec)

                - (getPaddingLeft() + getPaddingRight())

                - (int) Math.ceil(Layout.getDesiredWidth(KeyMaps.ELLIPSIS, paint));

        final Context context = getContext();

        final float newCharWidth = Layout.getDesiredWidth("\u2007", paint);

        // Digits are presumed to have no more than newCharWidth.

        // We sometimes replace a character by an ellipsis or, due to SCI_NOTATION_EXTRA, add

        // an extra decimal separator beyond the maximum number of characters we normally allow.

        // Empirically, our minus sign is also slightly wider than a digit, so we have to

        // account for that.  We never have both an ellipsis and two minus signs, and

        // we assume an ellipsis is no narrower than a minus sign.

        final float decimalSeparatorWidth = Layout.getDesiredWidth(

                context.getString(R.string.dec_point), paint);

        final float minusExtraWidth = Layout.getDesiredWidth(

                context.getString(R.string.op_sub), paint) - newCharWidth;

        final float ellipsisExtraWidth = Layout.getDesiredWidth(KeyMaps.ELLIPSIS, paint)

                - newCharWidth;

        final int extraWidth = (int) (Math.ceil(Math.max(decimalSeparatorWidth + minusExtraWidth,

                ellipsisExtraWidth)) + Math.max(minusExtraWidth, 0.0f));

        final int newWidthConstraint = MeasureSpec.getSize(widthMeasureSpec)

                - (getPaddingLeft() + getPaddingRight()) - extraWidth;

        synchronized(mWidthLock) {

            mWidthConstraint = newWidthConstraint;

            mCharWidth = newCharWidth;

            // Return something conservatively big, to force sufficient evaluation.

            return MAX_WIDTH;

        } else {

            // Always allow for the ellipsis character which already accounted for in the width

            // constraint.

            return result + 1;

            return result;

        }

    }