/** * @file point.h * * Terminal point types for referencing locations in the terminal grid. */ #ifndef GHOSTTY_VT_POINT_H#define GHOSTTY_VT_POINT_H #include <stdint.h> #ifdef __cplusplusextern "C" {#endif /** @defgroup point Point * * Types for referencing x/y positions in the terminal grid under * different coordinate systems (active area, viewport, full screen, * scrollback history). * * @{ */ /** * A coordinate in the terminal grid. * * @ingroup point */typedef struct {  /** Column (0-indexed). */  uint16_t x;   /** Row (0-indexed). May exceed page size for screen/history tags. */  uint32_t y;} GhosttyPointCoordinate; /** * Point reference tag. * * Determines which coordinate system a point uses. * * @ingroup point */typedef enum GHOSTTY_ENUM_TYPED {  /** Active area where the cursor can move. */  GHOSTTY_POINT_TAG_ACTIVE = 0,   /** Visible viewport (changes when scrolled). */  GHOSTTY_POINT_TAG_VIEWPORT = 1,   /** Full screen including scrollback. */  GHOSTTY_POINT_TAG_SCREEN = 2,   /** Scrollback history only (before active area). */  GHOSTTY_POINT_TAG_HISTORY = 3,  GHOSTTY_POINT_TAG_MAX_VALUE = GHOSTTY_ENUM_MAX_VALUE,  } GhosttyPointTag; /** * Point value union. * * @ingroup point */typedef union {  /** Coordinate (used for all tag variants). */  GhosttyPointCoordinate coordinate;   /** Padding for ABI compatibility. Do not use. */  uint64_t _padding[2];} GhosttyPointValue; /** * Tagged union for a point in the terminal grid. * * @ingroup point */typedef struct {  GhosttyPointTag tag;  GhosttyPointValue value;} GhosttyPoint; /** @} */ #ifdef __cplusplus}#endif #endif /* GHOSTTY_VT_POINT_H */