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#ifndef VIEW_H
#define VIEW_H
#include <limits.h>
#include <stdbool.h>
#include <sys/types.h>
#include "block-iter.h"
#include "util/macros.h"
#include "util/string-view.h"
typedef enum {
SELECT_NONE,
SELECT_CHARS,
SELECT_LINES,
} SelectionType;
// A view into a Buffer, with its own cursor position and selection.
// Visually speaking, each tab in a Window corresponds to a View.
typedef struct View {
struct Buffer *buffer;
struct Window *window;
BlockIter cursor;
long cx, cy; // Cursor position
long cx_display; // Visual cursor x (char widths: wide 2, tab 1-8, control 2, invalid char 4)
long cx_char; // Cursor x in characters (invalid UTF-8 character (byte) is 1 char)
long vx, vy; // Top left corner
long preferred_x; // Preferred cursor x (preferred value for cx_display)
int tt_width; // Tab title width
int tt_truncated_width;
bool center_on_scroll; // Center view to cursor if scrolled
bool force_center; // Force centering view to cursor
SelectionType selection;
SelectionType select_mode;
ssize_t sel_so; // Cursor offset when selection was started
ssize_t sel_eo; // See `SEL_EO_RECALC` below
// Used to save cursor state when multiple views share same buffer
bool restore_cursor;
size_t saved_cursor_offset;
} View;
// If View::sel_eo is set to this value it means the offset must
// be calculated from the cursor iterator. Otherwise the offset
// is precalculated and may not be the same as the cursor position
// (see search/replace code).
#define SEL_EO_RECALC SSIZE_MAX
static inline void view_reset_preferred_x(View *view)
{
view->preferred_x = -1;
}
void view_update_cursor_y(View *view) NONNULL_ARGS;
void view_update_cursor_x(View *view) NONNULL_ARGS;
void view_update(View *view, unsigned int scroll_margin) NONNULL_ARGS;
long view_get_preferred_x(View *view) NONNULL_ARGS;
bool view_can_close(const View *view) NONNULL_ARGS;
StringView view_do_get_word_under_cursor(const View *view, size_t *offset_in_line) NONNULL_ARGS;
StringView view_get_word_under_cursor(const View *view) NONNULL_ARGS;
#endif
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