direction_t# class direction_t# The direction of a text segment or buffer. A segment can also be tested for horizontal or vertical orientation (irrespective of specific direction) with DIRECTION_IS_HORIZONTAL() or DIRECTION_IS_VERTICAL(). Fields# class direction_t BTT# The type of the None singleton. INVALID# The type of the None singleton. LTR# The type of the None singleton. RTL# The type of the None singleton. TTB# The type of the None singleton.