If the new text and old text are "", return from onTextChanged.

            return;

        }

        mPreChange = postChange;

        // This was simply a delete or a cut, so just delete the selection.

        if (before > 0 && 0 == count) {

        if (0 == count) {

            if (before > 0) {

                // This was simply a delete or a cut, so just delete the

                // selection.

                mWebView.deleteSelection(start, start + before);

                // For this and all changes to the text, update our cache

                updateCachedTextfield();

            }

            // before should never be negative, so whether it was a cut

            // (handled above), or before is 0, in which case nothing has

            // changed, we should return.

            return;

        }

        // Find the last character being replaced.  If it can be represented by