(pos_visible_p): Remove exact_mode_line_heights_p arg;
so always calculate heights even when pos-visible-in-window-p is called with partially = t. Don't overshoot last_visible_y in move_it_to. Return row height and row number in new rowh and vpos args. (cursor_row_fully_visible_p): First line is always "fully visible". (try_window): Don't clear matrix if vscrolled.
Showing with 33 additions and 18 deletions