st.h

// Copyright 2024 jack@pngu.org
// SPDX-License-Identifier: MIT/X
#pragma once

#include <stdint.h>
#include <sys/types.h>

/* macros */
#define MIN(a, b)                                                              \
  ({                                                                           \
    __typeof__(a) _a = (a);                                                    \
    __typeof__(b) _b = (b);                                                    \
    _a < _b ? _a : _b;                                                         \
  })
#define MAX(a, b)                                                              \
  ({                                                                           \
    __typeof__(a) _a = (a);                                                    \
    __typeof__(b) _b = (b);                                                    \
    _a > _b ? _a : _b;                                                         \
  })
#define CHECK(value)                                                           \
  (!__builtin_types_compatible_p(typeof((value)), typeof(&(value)[0])))
#define LEN(a)                                                                 \
  (__builtin_choose_expr(CHECK((a)), sizeof((a)) / sizeof((a)[0]), (void)0))
#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
#define DIVCEIL(n, d) (((n) + ((d) - 1)) / (d))
#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
#define ATTRCMP(a, b)                                                          \
  (((a).mode & (~ATTR_WRAP) & (~ATTR_LIGA)) !=                                 \
       ((b).mode & (~ATTR_WRAP) & (~ATTR_LIGA)) ||                             \
   (a).fg != (b).fg || (a).bg != (b).bg)
#define TIMEDIFF(t1, t2)                                                       \
  ((t1.tv_sec - t2.tv_sec) * 1000 + (t1.tv_nsec - t2.tv_nsec) / 1E6)
#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))

#define TRUECOLOR(r, g, b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
#define IS_TRUECOL(x) (1 << 24 & (x))

enum glyph_attribute {
  ATTR_NULL = 0,
  ATTR_BOLD = 1 << 0,
  ATTR_FAINT = 1 << 1,
  ATTR_ITALIC = 1 << 2,
  ATTR_UNDERLINE = 1 << 3,
  ATTR_BLINK = 1 << 4,
  ATTR_REVERSE = 1 << 5,
  ATTR_INVISIBLE = 1 << 6,
  ATTR_STRUCK = 1 << 7,
  ATTR_WRAP = 1 << 8,
  ATTR_WIDE = 1 << 9,
  ATTR_WDUMMY = 1 << 10,
  ATTR_BOXDRAW = 1 << 11,
  ATTR_LIGA = 1 << 12,
  ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
};

enum drawing_mode {
  DRAW_NONE = 0,
  DRAW_BG = 1 << 0,
  DRAW_FG = 1 << 1,
};

enum selection_mode { SEL_IDLE = 0, SEL_EMPTY = 1, SEL_READY = 2 };

enum selection_type { SEL_REGULAR = 1, SEL_RECTANGULAR = 2 };

enum selection_snap { SNAP_WORD = 1, SNAP_LINE = 2 };

typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
typedef unsigned short ushort;

typedef uint_least32_t Rune;

#define Glyph Glyph_
typedef struct {
  Rune u;      /* character code */
  ushort mode; /* attribute flags */
  uint32_t fg; /* foreground  */
  uint32_t bg; /* background  */
} Glyph;

typedef Glyph *Line;

typedef union {
  int i;
  uint ui;
  float f;
  const void *v;
} Arg;

typedef struct {
  uint b;
  uint mask;
  void (*func)(const Arg *);
  const Arg arg;
} MouseKey;

void die(const char *, ...);
void redraw(void);
void draw(void);

void externalpipe(const Arg *);
void iso14755(const Arg *);
void kscrolldown(const Arg *);
void kscrollup(const Arg *);
void newterm(const Arg *);
void printscreen(const Arg *);
void printsel(const Arg *);
void sendbreak(const Arg *);
void toggleprinter(const Arg *);

int tattrset(int);
int tisaltscr(void);
void tnew(int, int);
void tresize(int, int);
void tsetdirtattr(int);
void ttyhangup(void);
int ttynew(const char *, char *, const char *, char **);
size_t ttyread(void);
void ttyresize(int, int);
void ttywrite(const char *, size_t, int);

void resettitle(void);

void selclear(void);
void selinit(void);
void selstart(int, int, int);
void selextend(int, int, int, int);
int selected(int, int);
char *getsel(void);

size_t utf8encode(Rune, char *);

void *xmalloc(size_t);
void *xrealloc(void *, size_t);
char *xstrdup(const char *);

int isboxdraw(Rune);
ushort boxdrawindex(const Glyph *);
#ifdef XFT_VERSION
/* only exposed to x.c, otherwise we'll need Xft.h for the types */
void boxdraw_xinit(Display *, Colormap, XftDraw *, Visual *);
void drawboxes(int, int, int, int, XftColor *, XftColor *,
               const XftGlyphFontSpec *, int);
#endif

/* config.h globals */
extern char *utmp;
extern char *stty_args;
extern char *vtiden;
extern wchar_t *worddelimiters;
extern int allowaltscreen;
extern char *termname;
extern unsigned int tabspaces;
extern unsigned int defaultfg;
extern unsigned int defaultbg;
extern unsigned int defaultcs;
extern const int boxdraw, boxdraw_bold, boxdraw_braille;
extern float alpha;
extern MouseKey mkeys[];
extern int ximspot_update_interval;