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#ifndef TERM_HIST_VIEW_H
#define TERM_HIST_VIEW_H
#include "hist.h"
struct line_pos {
uint64_t id;
uint32_t seg;
};
struct view_anchor {
uint64_t line_id;
uint64_t cell;
uint64_t base_cell;
uint32_t seg;
bool active;
};
struct hist_view {
struct view_anchor anchor;
/* Line ids map to circular slots. Tree sums use physical slot order. */
uint64_t *fenwick;
uint32_t *counts;
uint64_t total_rows;
uint64_t first_id, end_id;
uint64_t epoch, head, tail, last_cells;
int cols;
uint32_t cap;
int index_cols;
};
void term_hist_view_init(struct hist_view *v);
void term_hist_view_free(struct hist_view *v);
void term_hist_view_clear(struct hist_view *v);
/* Update the index during snapshot capture. Reads do not change it. */
bool term_hist_view_sync(struct hist_view *v, const struct hist *h, int cols);
void term_hist_view_refine(struct hist_view *v, struct hist *h, int cols, int rows);
uint64_t term_hist_view_rows(const struct hist_view *v, const struct hist *h, int cols);
bool term_hist_view_find_row(const struct hist_view *v, const struct hist *h, int row,
int cols, uint64_t *id, int *seg);
/* Read the offset from the anchor at the current width. */
int term_hist_view_scroll_offset(const struct hist_view *v, const struct hist *h, int cols);
void term_hist_view_scroll(struct hist_view *v, const struct hist *h, int cols,
struct line_pos screen_top, int lines);
void term_hist_view_scroll_to(struct hist_view *v, const struct hist *h, int cols,
struct line_pos screen_top, int offset);
void term_hist_view_reset_bottom(struct hist_view *v);
struct hist_view_pos {
uint64_t id;
int seg;
int screen_y;
};
/* Clamp an evicted anchor. This does not update the index on the write path. */
void term_hist_view_note_push(struct hist_view *v, const struct hist *h, int cols);
void term_hist_view_rewrap(struct hist_view *v, const struct hist *h, int cols);
bool term_hist_view_row_pos(const struct hist_view *v, const struct hist *h, int cols,
int screen_rows, struct line_pos screen_top, int y,
struct hist_view_pos *pos);
#endif
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