st.h

   1 /* See LICENSE for licence details. */
   2 #define _XOPEN_SOURCE
   3 #include <ctype.h>
   4 #include <errno.h>
   5 #include <fcntl.h>
   6 #include <locale.h>
   7 #include <stdarg.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <signal.h>
  12 #include <sys/ioctl.h>
  13 #include <sys/select.h>
  14 #include <sys/stat.h>
  15 #include <sys/types.h>
  16 #include <sys/wait.h>
  17 #include <unistd.h>
  18 #include <X11/Xlib.h>
  19 #include <X11/keysym.h>
  20 #include <X11/Xutil.h>
  21
  22 /* special keys */
  23 #define KEYDELETE "\033[3~"
  24 #define KEYHOME   "\033[1~"
  25 #define KEYEND    "\033[4~"
  26 #define KEYPREV   "\033[5~"
  27 #define KEYNEXT   "\033[6~"
  28
  29 #define TNAME "st"
  30 #define SHELL "/bin/bash"
  31 #define TAB    8
  32
  33 #define FONT "fixed"
  34 #define BORDER 3
  35 #define LINESPACE 1 /* additional pixel between each line */
  36
  37 /* Default colors */
  38 #define DefaultFG 7
  39 #define DefaultBG 0
  40 #define DefaultCS 1
  41 #define BellCol   DefaultFG /* visual bell color */
  42
  43 static char* colorname[] = {
  44         "black",
  45         "red",
  46         "green",
  47         "yellow",
  48         "blue",
  49         "magenta",
  50         "cyan",
  51         "white",
  52 };
  53
  54 /* Arbitrary sizes */
  55 #define ESCSIZ 256
  56 #define ESCARG 16
  57
  58 #define SERRNO strerror(errno)
  59 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
  60 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
  61 #define LEN(a)     (sizeof(a) / sizeof(a[0]))
  62 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
  63 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
  64 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
  65
  66
  67 enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4 }; /* Attribute */
  68 enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSwrap, CSsave, CSload }; /* Cursor */
  69 enum { CRset=1 , CRupdate=2 }; /* Character state */
  70 enum { TMwrap=1 , TMinsert=2, TMaltcharset }; /* Terminal mode */
  71 enum { SCupdate, SCredraw }; /* screen draw mode */
  72
  73 typedef int Color;
  74
  75 typedef struct {
  76         char c;     /* character code  */
  77         char mode;  /* attribute flags */
  78         Color fg;   /* foreground      */
  79         Color bg;   /* background      */
  80         char state; /* state flag      */
  81 } Glyph;
  82
  83 typedef Glyph* Line;
  84
  85 typedef struct {
  86         Glyph attr;  /* current char attributes */
  87         char hidden;
  88         int x;
  89         int y;
  90 } TCursor;
  91
  92 /* Escape sequence structs */
  93 typedef struct {
  94         char buf[ESCSIZ+1]; /* raw string */
  95         int len;            /* raw string length */
  96         /* ESC <pre> [[ [<priv>] <arg> [;]] <mode>] */
  97         char pre;
  98         char priv;
  99         int arg[ESCARG+1];
 100         int narg;           /* nb of args */
 101         char mode;
 102 } Escseq;
 103
 104 /* Internal representation of the screen */
 105 typedef struct {
 106         int row;    /* nb row */
 107         int col;    /* nb col */
 108         Line* line; /* screen */
 109         TCursor c;  /* cursor */
 110         int top;    /* top    scroll limit */
 111         int bot;    /* bottom scroll limit */
 112         int mode;   /* terminal mode */
 113 } Term;
 114
 115 /* Purely graphic info */
 116 typedef struct {
 117         Display* dis;
 118         Window win;
 119         int scr;
 120         int w;  /* window width  */
 121         int h;  /* window height */
 122         int ch; /* char height */
 123         int cw; /* char width  */
 124 } XWindow;
 125
 126 /* Drawing Context */
 127 typedef struct {
 128         unsigned long col[LEN(colorname)];
 129         XFontStruct* font;
 130         GC gc;
 131 } DC;
 132
 133
 134 void die(const char *errstr, ...);
 135 void draw(int);
 136 void execsh(void);
 137 void sigchld(int);
 138 void kpress(XKeyEvent *);
 139 void resize(XEvent *);
 140 void run(void);
 141
 142 int escaddc(char);
 143 int escfinal(char);
 144 void escdump(void);
 145 void eschandle(void);
 146 void escparse(void);
 147 void escreset(void);
 148
 149 void tclearregion(int, int, int, int);
 150 void tcpos(int);
 151 void tcursor(int);
 152 void tdeletechar(int);
 153 void tdeleteline(int);
 154 void tdump(void);
 155 void tinsertblank(int);
 156 void tinsertblankline(int);
 157 void tmoveto(int, int);
 158 void tnew(int, int);
 159 void tnewline(void);
 160 void tputc(char);
 161 void tputs(char*, int);
 162 void tresize(int, int);
 163 void tscroll(void);
 164 void tsetattr(int*, int);
 165 void tsetchar(char);
 166 void tsetscroll(int, int);
 167
 168 void ttynew(void);
 169 void ttyread(void);
 170 void ttyresize(int, int);
 171 void ttywrite(char *, size_t);
 172
 173 unsigned long xgetcol(const char *);
 174 void xclear(int, int, int, int);
 175 void xcursor(int);
 176 void xdrawc(int, int, Glyph);
 177 void xinit(void);
 178 void xscroll(void);