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