/* See LICENSE for licence details. */
#define _XOPEN_SOURCE
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xutil.h>
/* special keys */
#define KEYDELETE "\033[3~"
#define KEYHOME "\033[1~"
#define KEYEND "\033[4~"
#define KEYPREV "\033[5~"
#define KEYNEXT "\033[6~"
#define TNAME "st"
#define SHELL "/bin/bash"
#define TAB 8
#define FONT "fixed"
#define BORDER 3
#define LINESPACE 1 /* additional pixel between each line */
/* Default colors */
#define DefaultFG 7
#define DefaultBG 0
#define DefaultCS 1
#define BellCol DefaultFG /* visual bell color */
static char* colorname[] = {
"black",
"red",
"green",
"yellow",
"blue",
"magenta",
"cyan",
"white",
};
/* Arbitrary sizes */
#define ESCSIZ 256
#define ESCARG 16
#define SERRNO strerror(errno)
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) < (b) ? (b) : (a))
#define LEN(a) (sizeof(a) / sizeof(a[0]))
#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4 }; /* Attribute */
enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSwrap, CSsave, CSload }; /* Cursor */
enum { CRset=1 , CRupdate=2 }; /* Character state */
enum { TMwrap=1 , TMinsert=2, TMaltcharset }; /* Terminal mode */
enum { SCupdate, SCredraw }; /* screen draw mode */
typedef int Color;
typedef struct {
char c; /* character code */
char mode; /* attribute flags */
Color fg; /* foreground */
Color bg; /* background */
char state; /* state flag */
} Glyph;
typedef Glyph* Line;
typedef struct {
Glyph attr; /* current char attributes */
char hidden;
int x;
int y;
} TCursor;
/* Escape sequence structs */
typedef struct {
char buf[ESCSIZ+1]; /* raw string */
int len; /* raw string length */
/* ESC <pre> [[ [<priv>] <arg> [;]] <mode>] */
char pre;
char priv;
int arg[ESCARG+1];
int narg; /* nb of args */
char mode;
} Escseq;
/* Internal representation of the screen */
typedef struct {
int row; /* nb row */
int col; /* nb col */
Line* line; /* screen */
TCursor c; /* cursor */
int top; /* top scroll limit */
int bot; /* bottom scroll limit */
int mode; /* terminal mode */
} Term;
/* Purely graphic info */
typedef struct {
Display* dis;
Window win;
int scr;
int w; /* window width */
int h; /* window height */
int ch; /* char height */
int cw; /* char width */
} XWindow;
/* Drawing Context */
typedef struct {
unsigned long col[LEN(colorname)];
XFontStruct* font;
GC gc;
} DC;
void die(const char *errstr, ...);
void draw(int);
void execsh(void);
void sigchld(int);
void kpress(XKeyEvent *);
void resize(XEvent *);
void run(void);
int escaddc(char);
int escfinal(char);
void escdump(void);
void eschandle(void);
void escparse(void);
void escreset(void);
void tclearregion(int, int, int, int);
void tcpos(int);
void tcursor(int);
void tdeletechar(int);
void tdeleteline(int);
void tdump(void);
void tinsertblank(int);
void tinsertblankline(int);
void tmoveto(int, int);
void tnew(int, int);
void tnewline(void);
void tputc(char);
void tputs(char*, int);
void tresize(int, int);
void tscroll(void);
void tsetattr(int*, int);
void tsetchar(char);
void tsetscroll(int, int);
void ttynew(void);
void ttyread(void);
void ttyresize(int, int);
void ttywrite(char *, size_t);
unsigned long xgetcol(const char *);
void xclear(int, int, int, int);
void xcursor(int);
void xdrawc(int, int, Glyph);
void xinit(void);
void xscroll(void);
