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1229 lines
26 KiB
1229 lines
26 KiB
/* See LICENSE for licence details. */
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#define _XOPEN_SOURCE 600
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.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 <signal.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 <sys/wait.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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#define TNAME "xterm"
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/* Arbitrary sizes */
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#define ESC_TITLE_SIZ 256
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#define ESC_BUF_SIZ 256
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#define ESC_ARG_SIZ 16
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#define DRAW_BUF_SIZ 1024
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#define SERRNO strerror(errno)
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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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#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
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/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
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enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
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enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE, CURSOR_DRAW, CURSOR_SAVE, CURSOR_LOAD };
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enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
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enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
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enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
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enum { SCREEN_UPDATE, SCREEN_REDRAW };
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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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int fg; /* foreground */
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int bg; /* background */
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char state; /* state flags */
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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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/* CSI Escape sequence structs */
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/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
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typedef struct {
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char buf[ESC_BUF_SIZ]; /* raw string */
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int len; /* raw string length */
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char priv;
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int arg[ESC_ARG_SIZ];
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int narg; /* nb of args */
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char mode;
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} CSIEscape;
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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 flags */
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int esc; /* escape state flags */
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char title[ESC_TITLE_SIZ];
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int titlelen;
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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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typedef struct {
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KeySym k;
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char s[ESC_BUF_SIZ];
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} Key;
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#include "config.h"
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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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static void die(const char *errstr, ...);
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static void draw(int);
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static void execsh(void);
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static void sigchld(int);
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static void run(void);
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static void csidump(void);
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static void csihandle(void);
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static void csiparse(void);
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static void csireset(void);
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static void tclearregion(int, int, int, int);
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static void tcursor(int);
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static void tmovecursor(int);
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static void tdeletechar(int);
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static void tdeleteline(int);
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static void tinsertblank(int);
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static void tinsertblankline(int);
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static void tmoveto(int, int);
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static void tnew(int, int);
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static void tnewline(void);
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static void tputc(char);
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static void tputs(char*, int);
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static void tresize(int, int);
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static void tscroll(void);
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static void tsetattr(int*, int);
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static void tsetchar(char);
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static void tsetscroll(int, int);
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static void ttynew(void);
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static void ttyread(void);
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static void ttyresize(int, int);
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static void ttywrite(const char *, size_t);
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static unsigned long xgetcol(const char *);
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static void xclear(int, int, int, int);
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static void xcursor(int);
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static void xdrawc(int, int, Glyph);
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static void xinit(void);
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static void xscroll(void);
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static void expose(XEvent *);
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static char * kmap(KeySym);
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static void kpress(XEvent *);
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static void resize(XEvent *);
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static void (*handler[LASTEvent])(XEvent *) = {
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[KeyPress] = kpress,
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[Expose] = expose,
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[ConfigureNotify] = resize
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};
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/* Globals */
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static DC dc;
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static XWindow xw;
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static Term term;
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static CSIEscape escseq;
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static int cmdfd;
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static pid_t pid;
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static int running;
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#ifdef DEBUG
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void
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tdump(void) {
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int row, col;
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Glyph c;
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for(row = 0; row < term.row; row++) {
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for(col = 0; col < term.col; col++) {
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if(col == term.c.x && row == term.c.y)
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putchar('#');
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else {
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c = term.line[row][col];
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putchar(c.state & GLYPH_SET ? c.c : '.');
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}
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}
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putchar('\n');
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}
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}
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#endif
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void
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die(const char *errstr, ...) {
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va_list ap;
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va_start(ap, errstr);
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vfprintf(stderr, errstr, ap);
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va_end(ap);
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exit(EXIT_FAILURE);
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}
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void
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execsh(void) {
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char *args[3] = {SHELL, "-i", NULL};
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putenv("TERM=" TNAME);
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execvp(SHELL, args);
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}
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void
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xbell(void) { /* visual bell */
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XRectangle r = { 0, 0, xw.w, xw.h };
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XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
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XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
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/* usleep(30000); */
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draw(SCREEN_REDRAW);
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}
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void
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sigchld(int a) {
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int stat = 0;
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if(waitpid(pid, &stat, 0) < 0)
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die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
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if(WIFEXITED(stat))
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exit(WEXITSTATUS(stat));
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else
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exit(EXIT_FAILURE);
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}
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void
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ttynew(void) {
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int m, s;
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char *pts;
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if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
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die("openpt failed: %s\n", SERRNO);
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if(grantpt(m) < 0)
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die("grandpt failed: %s\n", SERRNO);
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if(unlockpt(m) < 0)
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die("unlockpt failed: %s\n", SERRNO);
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if(!(pts = ptsname(m)))
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die("ptsname failed: %s\n", SERRNO);
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if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
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die("Couldn't open slave: %s\n", SERRNO);
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fcntl(s, F_SETFL, O_NDELAY);
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switch(pid = fork()) {
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case -1:
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die("fork failed\n");
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break;
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case 0:
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setsid(); /* create a new process group */
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dup2(s, STDIN_FILENO);
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dup2(s, STDOUT_FILENO);
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dup2(s, STDERR_FILENO);
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if(ioctl(s, TIOCSCTTY, NULL) < 0)
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die("ioctl TTIOCSTTY failed: %s\n", SERRNO);
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execsh();
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break;
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default:
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close(s);
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cmdfd = m;
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signal(SIGCHLD, sigchld);
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}
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}
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void
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dump(char c) {
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static int col;
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fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
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if(++col % 10 == 0)
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fprintf(stderr, "\n");
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}
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void
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ttyread(void) {
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char buf[BUFSIZ] = {0};
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int ret;
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if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
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die("Couldn't read from shell: %s\n", SERRNO);
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else
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tputs(buf, ret);
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}
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void
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ttywrite(const char *s, size_t n) {
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if(write(cmdfd, s, n) == -1)
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die("write error on tty: %s\n", SERRNO);
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}
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void
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ttyresize(int x, int y) {
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struct winsize w;
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w.ws_row = term.row;
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w.ws_col = term.col;
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w.ws_xpixel = w.ws_ypixel = 0;
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if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
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fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
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}
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void
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tcursor(int mode) {
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static TCursor c;
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if(mode == CURSOR_SAVE)
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c = term.c;
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else if(mode == CURSOR_LOAD)
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term.c = c, tmoveto(c.x, c.y);
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}
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void
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tnew(int col, int row) { /* screen size */
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term.row = row, term.col = col;
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term.top = 0, term.bot = term.row - 1;
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/* mode */
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term.mode = MODE_WRAP;
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/* cursor */
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term.c.attr.mode = ATTR_NULL;
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term.c.attr.fg = DefaultFG;
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term.c.attr.bg = DefaultBG;
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term.c.x = term.c.y = 0;
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term.c.hidden = 0;
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/* allocate screen */
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term.line = calloc(term.row, sizeof(Line));
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for(row = 0 ; row < term.row; row++)
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term.line[row] = calloc(term.col, sizeof(Glyph));
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}
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void
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tscroll(void) {
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Line temp = term.line[term.top];
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int i;
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/* X stuff _before_ the line swapping (results in wrong line index) */
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xscroll();
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for(i = term.top; i < term.bot; i++)
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term.line[i] = term.line[i+1];
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memset(temp, 0, sizeof(Glyph) * term.col);
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term.line[term.bot] = temp;
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}
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void
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tnewline(void) {
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int y = term.c.y + 1;
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if(y > term.bot)
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tscroll(), y = term.bot;
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tmoveto(0, y);
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}
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void
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csiparse(void) {
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/* int noarg = 1; */
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char *p = escseq.buf;
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escseq.narg = 0;
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if(*p == '?')
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escseq.priv = 1, p++;
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while(p < escseq.buf+escseq.len) {
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while(isdigit(*p)) {
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escseq.arg[escseq.narg] *= 10;
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escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
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}
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if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
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escseq.narg++, p++;
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else {
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escseq.mode = *p;
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escseq.narg++;
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return;
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}
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}
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}
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void
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tmoveto(int x, int y) {
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term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
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term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
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}
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void
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tmovecursor(int dir) {
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int xf = term.c.x, yf = term.c.y;
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switch(dir) {
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case CURSOR_UP:
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yf--;
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break;
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case CURSOR_DOWN:
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yf++;
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break;
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case CURSOR_LEFT:
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xf--;
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if(term.mode & MODE_WRAP && xf < 0) {
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xf = term.col-1, yf--;
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if(yf < term.top)
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yf = term.top, xf = 0;
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}
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break;
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case CURSOR_RIGHT:
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xf++;
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if(term.mode & MODE_WRAP && xf >= term.col) {
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xf = 0, yf++;
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if(yf > term.bot)
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yf = term.bot, tscroll();
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}
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break;
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}
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tmoveto(xf, yf);
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}
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void
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tsetchar(char c) {
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term.line[term.c.y][term.c.x] = term.c.attr;
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term.line[term.c.y][term.c.x].c = c;
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term.line[term.c.y][term.c.x].state |= GLYPH_SET | GLYPH_DIRTY;
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}
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void
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tclearregion(int x1, int y1, int x2, int y2) {
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int x, y;
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LIMIT(x1, 0, term.col-1);
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LIMIT(x2, 0, term.col-1);
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LIMIT(y1, 0, term.row-1);
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LIMIT(y2, 0, term.row-1);
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/* XXX: could be optimized */
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for(x = x1; x <= x2; x++)
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for(y = y1; y <= y2; y++)
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memset(&term.line[y][x], 0, sizeof(Glyph));
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xclear(x1, y1, x2, y2);
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}
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void
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tdeletechar(int n) {
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int src = term.c.x + n;
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int dst = term.c.x;
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int size = term.col - src;
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if(src >= term.col) {
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tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
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return;
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}
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memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
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tclearregion(term.col-size, term.c.y, term.col-1, term.c.y);
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}
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void
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tinsertblank(int n) {
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int src = term.c.x;
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int dst = src + n;
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int size = term.col - n - src;
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if(dst >= term.col) {
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tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
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return;
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}
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memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
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tclearregion(src, term.c.y, dst, term.c.y);
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}
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void
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tsetlinestate(int n, int state) {
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int i;
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for(i = 0; i < term.col; i++)
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term.line[n][i].state |= state;
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}
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void
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tinsertblankline(int n) {
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int i;
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Line blank;
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int bot = term.bot;
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if(term.c.y > term.bot)
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bot = term.row - 1;
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else if(term.c.y < term.top)
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bot = term.top - 1;
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if(term.c.y + n >= bot) {
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tclearregion(0, term.c.y, term.col-1, bot);
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return;
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}
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for(i = bot; i >= term.c.y+n; i--) {
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/* swap deleted line <-> blanked line */
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blank = term.line[i];
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term.line[i] = term.line[i-n];
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term.line[i-n] = blank;
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/* blank it */
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memset(blank, 0, term.col * sizeof(Glyph));
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tsetlinestate(i, GLYPH_DIRTY);
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tsetlinestate(i-n, GLYPH_DIRTY);
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}
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}
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void
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tdeleteline(int n) {
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int i;
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Line blank;
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int bot = term.bot;
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if(term.c.y > term.bot)
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bot = term.row - 1;
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else if(term.c.y < term.top)
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bot = term.top - 1;
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if(term.c.y + n >= bot) {
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tclearregion(0, term.c.y, term.col-1, bot);
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return;
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}
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for(i = term.c.y; i <= bot-n; i++) {
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/* swap deleted line <-> blanked line */
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blank = term.line[i];
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term.line[i] = term.line[i+n];
|
|
term.line[i+n] = blank;
|
|
/* blank it */
|
|
memset(blank, 0, term.col * sizeof(Glyph));
|
|
tsetlinestate(i, GLYPH_DIRTY);
|
|
tsetlinestate(i-n, GLYPH_DIRTY);
|
|
}
|
|
}
|
|
|
|
void
|
|
tsetattr(int *attr, int l) {
|
|
int i;
|
|
|
|
for(i = 0; i < l; i++) {
|
|
switch(attr[i]) {
|
|
case 0:
|
|
term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
|
|
term.c.attr.fg = DefaultFG;
|
|
term.c.attr.bg = DefaultBG;
|
|
break;
|
|
case 1:
|
|
term.c.attr.mode |= ATTR_BOLD;
|
|
break;
|
|
case 4:
|
|
term.c.attr.mode |= ATTR_UNDERLINE;
|
|
break;
|
|
case 7:
|
|
term.c.attr.mode |= ATTR_REVERSE;
|
|
break;
|
|
case 8:
|
|
term.c.hidden = CURSOR_HIDE;
|
|
break;
|
|
case 22:
|
|
term.c.attr.mode &= ~ATTR_BOLD;
|
|
break;
|
|
case 24:
|
|
term.c.attr.mode &= ~ATTR_UNDERLINE;
|
|
break;
|
|
case 27:
|
|
term.c.attr.mode &= ~ATTR_REVERSE;
|
|
break;
|
|
case 39:
|
|
term.c.attr.fg = DefaultFG;
|
|
break;
|
|
case 49:
|
|
term.c.attr.fg = DefaultBG;
|
|
break;
|
|
default:
|
|
if(BETWEEN(attr[i], 30, 37))
|
|
term.c.attr.fg = attr[i] - 30;
|
|
else if(BETWEEN(attr[i], 40, 47))
|
|
term.c.attr.bg = attr[i] - 40;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
tsetscroll(int t, int b) {
|
|
int temp;
|
|
|
|
LIMIT(t, 0, term.row-1);
|
|
LIMIT(b, 0, term.row-1);
|
|
if(t > b) {
|
|
temp = t;
|
|
t = b;
|
|
b = temp;
|
|
}
|
|
term.top = t;
|
|
term.bot = b;
|
|
}
|
|
|
|
void
|
|
csihandle(void) {
|
|
switch(escseq.mode) {
|
|
default:
|
|
unknown:
|
|
printf("erresc: unknown sequence -- ");
|
|
csidump();
|
|
/* die(""); */
|
|
break;
|
|
case '@': /* ICH -- Insert <n> blank char */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tinsertblank(escseq.arg[0]);
|
|
break;
|
|
case 'A': /* CUU -- Cursor <n> Up */
|
|
case 'e':
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tmoveto(term.c.x, term.c.y-escseq.arg[0]);
|
|
break;
|
|
case 'B': /* CUD -- Cursor <n> Down */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tmoveto(term.c.x, term.c.y+escseq.arg[0]);
|
|
break;
|
|
case 'C': /* CUF -- Cursor <n> Forward */
|
|
case 'a':
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tmoveto(term.c.x+escseq.arg[0], term.c.y);
|
|
break;
|
|
case 'D': /* CUB -- Cursor <n> Backward */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tmoveto(term.c.x-escseq.arg[0], term.c.y);
|
|
break;
|
|
case 'E': /* CNL -- Cursor <n> Down and first col */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tmoveto(0, term.c.y+escseq.arg[0]);
|
|
break;
|
|
case 'F': /* CPL -- Cursor <n> Up and first col */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tmoveto(0, term.c.y-escseq.arg[0]);
|
|
break;
|
|
case 'G': /* CHA -- Move to <col> */
|
|
case '`': /* XXX: HPA -- same? */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tmoveto(escseq.arg[0]-1, term.c.y);
|
|
break;
|
|
case 'H': /* CUP -- Move to <row> <col> */
|
|
case 'f': /* XXX: HVP -- same? */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
DEFAULT(escseq.arg[1], 1);
|
|
tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
|
|
break;
|
|
/* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
|
|
case 'J': /* ED -- Clear screen */
|
|
switch(escseq.arg[0]) {
|
|
case 0: /* below */
|
|
tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
|
|
break;
|
|
case 1: /* above */
|
|
tclearregion(0, 0, term.c.x, term.c.y);
|
|
break;
|
|
case 2: /* all */
|
|
tclearregion(0, 0, term.col-1, term.row-1);
|
|
break;
|
|
case 3: /* XXX: erase saved lines (xterm) */
|
|
default:
|
|
goto unknown;
|
|
}
|
|
break;
|
|
case 'K': /* EL -- Clear line */
|
|
switch(escseq.arg[0]) {
|
|
case 0: /* right */
|
|
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
|
|
break;
|
|
case 1: /* left */
|
|
tclearregion(0, term.c.y, term.c.x, term.c.y);
|
|
break;
|
|
case 2: /* all */
|
|
tclearregion(0, term.c.y, term.col-1, term.c.y);
|
|
break;
|
|
}
|
|
break;
|
|
case 'S': /* XXX: SU -- Scroll <n> line up (faked) */
|
|
case 'L': /* IL -- Insert <n> blank lines */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tinsertblankline(escseq.arg[0]);
|
|
break;
|
|
case 'l': /* RM -- Reset Mode */
|
|
if(escseq.priv) {
|
|
switch(escseq.arg[0]) {
|
|
case 1:
|
|
term.mode &= ~MODE_APPKEYPAD;
|
|
break;
|
|
case 7:
|
|
term.mode &= ~MODE_WRAP;
|
|
break;
|
|
case 12: /* att610 -- Stop blinking cursor (IGNORED) */
|
|
break;
|
|
case 25:
|
|
term.c.hidden = 1;
|
|
break;
|
|
case 1048: /* XXX: no alt. screen to erase/save */
|
|
case 1049:
|
|
tcursor(CURSOR_LOAD);
|
|
tclearregion(0, 0, term.col-1, term.row-1);
|
|
break;
|
|
default:
|
|
goto unknown;
|
|
}
|
|
} else {
|
|
switch(escseq.arg[0]) {
|
|
case 4:
|
|
term.mode &= ~MODE_INSERT;
|
|
break;
|
|
default:
|
|
goto unknown;
|
|
}
|
|
}
|
|
break;
|
|
case 'M': /* DL -- Delete <n> lines */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tdeleteline(escseq.arg[0]);
|
|
break;
|
|
case 'X': /* ECH -- Erase <n> char */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
|
|
break;
|
|
case 'P': /* DCH -- Delete <n> char */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tdeletechar(escseq.arg[0]);
|
|
break;
|
|
/* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
|
|
case 'd': /* VPA -- Move to <row> */
|
|
DEFAULT(escseq.arg[0], 1);
|
|
tmoveto(term.c.x, escseq.arg[0]-1);
|
|
break;
|
|
case 'h': /* SM -- Set terminal mode */
|
|
if(escseq.priv) {
|
|
switch(escseq.arg[0]) {
|
|
case 1:
|
|
term.mode |= MODE_APPKEYPAD;
|
|
break;
|
|
case 7:
|
|
term.mode |= MODE_WRAP;
|
|
break;
|
|
case 12: /* att610 -- Start blinking cursor (IGNORED) */
|
|
break;
|
|
case 25:
|
|
term.c.hidden = 0;
|
|
break;
|
|
case 1048:
|
|
case 1049: /* XXX: no alt. screen to erase/save */
|
|
tcursor(CURSOR_SAVE);
|
|
tclearregion(0, 0, term.col-1, term.row-1);
|
|
break;
|
|
default: goto unknown;
|
|
}
|
|
} else {
|
|
switch(escseq.arg[0]) {
|
|
case 4:
|
|
term.mode |= MODE_INSERT;
|
|
break;
|
|
default: goto unknown;
|
|
}
|
|
};
|
|
break;
|
|
case 'm': /* SGR -- Terminal attribute (color) */
|
|
tsetattr(escseq.arg, escseq.narg);
|
|
break;
|
|
case 'r': /* DECSTBM -- Set Scrolling Region */
|
|
if(escseq.priv)
|
|
goto unknown;
|
|
else {
|
|
DEFAULT(escseq.arg[0], 1);
|
|
DEFAULT(escseq.arg[1], term.row);
|
|
tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
|
|
}
|
|
break;
|
|
case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
|
|
tcursor(CURSOR_SAVE);
|
|
break;
|
|
case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
|
|
tcursor(CURSOR_LOAD);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
csidump(void) {
|
|
int i;
|
|
printf("ESC [ %s", escseq.priv ? "? " : "");
|
|
if(escseq.narg)
|
|
for(i = 0; i < escseq.narg; i++)
|
|
printf("%d ", escseq.arg[i]);
|
|
if(escseq.mode)
|
|
putchar(escseq.mode);
|
|
putchar('\n');
|
|
}
|
|
|
|
void
|
|
csireset(void) {
|
|
memset(&escseq, 0, sizeof(escseq));
|
|
}
|
|
|
|
void
|
|
tputtab(void) {
|
|
int space = TAB - term.c.x % TAB;
|
|
|
|
if(term.c.x + space >= term.col)
|
|
space--;
|
|
|
|
for(; space > 0; space--)
|
|
tmovecursor(CURSOR_RIGHT);
|
|
}
|
|
|
|
void
|
|
tputc(char c) {
|
|
/* dump(c); */
|
|
if(term.esc & ESC_START) {
|
|
if(term.esc & ESC_CSI) {
|
|
escseq.buf[escseq.len++] = c;
|
|
if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
|
|
term.esc = 0;
|
|
csiparse(), csihandle();
|
|
}
|
|
} else if(term.esc & ESC_OSC) {
|
|
if(c == ';') {
|
|
term.titlelen = 0;
|
|
term.esc = ESC_START | ESC_TITLE;
|
|
}
|
|
} else if(term.esc & ESC_TITLE) {
|
|
if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
|
|
term.esc = 0;
|
|
term.title[term.titlelen] = '\0';
|
|
XStoreName(xw.dis, xw.win, term.title);
|
|
} else {
|
|
term.title[term.titlelen++] = c;
|
|
}
|
|
} else if(term.esc & ESC_ALTCHARSET) {
|
|
switch(c) {
|
|
case '0': /* Line drawing crap */
|
|
term.c.attr.mode |= ATTR_GFX;
|
|
break;
|
|
case 'B': /* Back to regular text */
|
|
term.c.attr.mode &= ~ATTR_GFX;
|
|
break;
|
|
default:
|
|
printf("esc unhandled charset: ESC ( %c\n", c);
|
|
}
|
|
term.esc = 0;
|
|
} else {
|
|
switch(c) {
|
|
case '[':
|
|
term.esc |= ESC_CSI;
|
|
break;
|
|
case ']':
|
|
term.esc |= ESC_OSC;
|
|
break;
|
|
case '(':
|
|
term.esc |= ESC_ALTCHARSET;
|
|
break;
|
|
case 'A':
|
|
tmoveto(term.c.x, term.c.y-1);
|
|
term.esc = 0;
|
|
break;
|
|
case 'B':
|
|
tmoveto(term.c.x, term.c.y+1);
|
|
term.esc = 0;
|
|
break;
|
|
case 'C':
|
|
tmoveto(term.c.x+1, term.c.y);
|
|
term.esc = 0;
|
|
break;
|
|
case 'D':
|
|
tmoveto(term.c.x-1, term.c.y);
|
|
term.esc = 0;
|
|
break;
|
|
case '=': /* DECPAM */
|
|
term.mode |= MODE_APPKEYPAD;
|
|
term.esc = 0;
|
|
break;
|
|
case '>': /* DECPNM */
|
|
term.mode &= ~MODE_APPKEYPAD;
|
|
term.esc = 0;
|
|
break;
|
|
default:
|
|
fprintf(stderr, "erresc: unknown sequence ESC %02X '%c'\n", c, isprint(c)?c:'.');
|
|
term.esc = 0;
|
|
}
|
|
}
|
|
} else {
|
|
switch(c) {
|
|
case '\t':
|
|
tputtab();
|
|
break;
|
|
case '\b':
|
|
tmovecursor(CURSOR_LEFT);
|
|
break;
|
|
case '\r':
|
|
tmoveto(0, term.c.y);
|
|
break;
|
|
case '\n':
|
|
tnewline();
|
|
break;
|
|
case '\a':
|
|
xbell();
|
|
break;
|
|
case '\033':
|
|
csireset();
|
|
term.esc = ESC_START;
|
|
break;
|
|
default:
|
|
tsetchar(c);
|
|
tmovecursor(CURSOR_RIGHT);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
tputs(char *s, int len) {
|
|
for(; len > 0; len--)
|
|
tputc(*s++);
|
|
}
|
|
|
|
void
|
|
tresize(int col, int row) {
|
|
int i;
|
|
Line *line;
|
|
int minrow = MIN(row, term.row);
|
|
int mincol = MIN(col, term.col);
|
|
|
|
if(col < 1 || row < 1)
|
|
return;
|
|
/* alloc */
|
|
line = calloc(row, sizeof(Line));
|
|
for(i = 0 ; i < row; i++)
|
|
line[i] = calloc(col, sizeof(Glyph));
|
|
/* copy */
|
|
for(i = 0 ; i < minrow; i++)
|
|
memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
|
|
/* free */
|
|
for(i = 0; i < term.row; i++)
|
|
free(term.line[i]);
|
|
free(term.line);
|
|
|
|
LIMIT(term.c.x, 0, col-1);
|
|
LIMIT(term.c.y, 0, row-1);
|
|
LIMIT(term.top, 0, row-1);
|
|
LIMIT(term.bot, 0, row-1);
|
|
|
|
term.bot = row-1;
|
|
term.line = line;
|
|
term.col = col, term.row = row;
|
|
}
|
|
|
|
unsigned long
|
|
xgetcol(const char *s) {
|
|
XColor color;
|
|
Colormap cmap = DefaultColormap(xw.dis, xw.scr);
|
|
|
|
if(!XAllocNamedColor(xw.dis, cmap, s, &color, &color)) {
|
|
color.pixel = WhitePixel(xw.dis, xw.scr);
|
|
fprintf(stderr, "Could not allocate color '%s'\n", s);
|
|
}
|
|
return color.pixel;
|
|
}
|
|
|
|
void
|
|
xclear(int x1, int y1, int x2, int y2) {
|
|
XClearArea(xw.dis, xw.win,
|
|
x1 * xw.cw, y1 * xw.ch,
|
|
(x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch,
|
|
False);
|
|
}
|
|
|
|
void
|
|
xscroll(void) {
|
|
int srcy = (term.top+1) * xw.ch;
|
|
int dsty = term.top * xw.ch;
|
|
int height = (term.bot-term.top) * xw.ch;
|
|
|
|
xcursor(CURSOR_HIDE);
|
|
XCopyArea(xw.dis, xw.win, xw.win, dc.gc, 0, srcy, xw.w, height, 0, dsty);
|
|
xclear(0, term.bot, term.col-1, term.bot);
|
|
}
|
|
|
|
void
|
|
xinit(void) {
|
|
XGCValues values;
|
|
unsigned long valuemask;
|
|
XClassHint chint;
|
|
XWMHints wmhint;
|
|
XSizeHints shint;
|
|
char *args[] = {NULL};
|
|
int i;
|
|
|
|
xw.dis = XOpenDisplay(NULL);
|
|
xw.scr = XDefaultScreen(xw.dis);
|
|
if(!xw.dis)
|
|
die("Can't open display\n");
|
|
|
|
/* font */
|
|
if(!(dc.font = XLoadQueryFont(xw.dis, FONT)))
|
|
die("Can't load font %s\n", FONT);
|
|
|
|
xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
|
|
xw.ch = dc.font->ascent + dc.font->descent + LINESPACE;
|
|
|
|
/* colors */
|
|
for(i = 0; i < LEN(colorname); i++)
|
|
dc.col[i] = xgetcol(colorname[i]);
|
|
|
|
term.c.attr.fg = DefaultFG;
|
|
term.c.attr.bg = DefaultBG;
|
|
term.c.attr.mode = ATTR_NULL;
|
|
/* windows */
|
|
xw.h = term.row * xw.ch;
|
|
xw.w = term.col * xw.cw;
|
|
/* XXX: this BORDER is useless after the first resize, handle it in xdraws() */
|
|
xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
|
|
xw.w, xw.h, BORDER,
|
|
dc.col[DefaultBG],
|
|
dc.col[DefaultBG]);
|
|
/* gc */
|
|
values.foreground = XWhitePixel(xw.dis, xw.scr);
|
|
values.font = dc.font->fid;
|
|
valuemask = GCForeground | GCFont;
|
|
dc.gc = XCreateGC(xw.dis, xw.win, valuemask, &values);
|
|
XMapWindow(xw.dis, xw.win);
|
|
/* wm stuff */
|
|
chint.res_name = TNAME, chint.res_class = TNAME;
|
|
wmhint.input = 1, wmhint.flags = InputHint;
|
|
shint.height_inc = xw.ch, shint.width_inc = xw.cw;
|
|
shint.height = xw.h, shint.width = xw.w;
|
|
shint.flags = PSize | PResizeInc;
|
|
XSetWMProperties(xw.dis, xw.win, NULL, NULL, &args[0], 0, &shint, &wmhint, &chint);
|
|
XStoreName(xw.dis, xw.win, TNAME);
|
|
XSync(xw.dis, 0);
|
|
}
|
|
|
|
void
|
|
xdraws(char *s, Glyph base, int x, int y, int len) {
|
|
unsigned long xfg, xbg;
|
|
int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
|
|
int i;
|
|
|
|
if(base.mode & ATTR_REVERSE)
|
|
xfg = dc.col[base.bg], xbg = dc.col[base.fg];
|
|
else
|
|
xfg = dc.col[base.fg], xbg = dc.col[base.bg];
|
|
|
|
XSetBackground(xw.dis, dc.gc, xbg);
|
|
XSetForeground(xw.dis, dc.gc, xfg);
|
|
|
|
if(base.mode & ATTR_GFX)
|
|
for(i = 0; i < len; i++)
|
|
s[i] = gfx[s[i]];
|
|
|
|
XDrawImageString(xw.dis, xw.win, dc.gc, winx, winy, s, len);
|
|
|
|
if(base.mode & ATTR_UNDERLINE)
|
|
XDrawLine(xw.dis, xw.win, dc.gc, winx, winy+1, winx+width-1, winy+1);
|
|
}
|
|
|
|
void
|
|
xdrawc(int x, int y, Glyph g) {
|
|
XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
|
|
unsigned long xfg, xbg;
|
|
|
|
/* reverse video */
|
|
if(g.mode & ATTR_REVERSE)
|
|
xfg = dc.col[g.bg], xbg = dc.col[g.fg];
|
|
else
|
|
xfg = dc.col[g.fg], xbg = dc.col[g.bg];
|
|
/* background */
|
|
XSetBackground(xw.dis, dc.gc, xbg);
|
|
XSetForeground(xw.dis, dc.gc, xfg);
|
|
XDrawImageString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
|
|
}
|
|
|
|
void
|
|
xcursor(int mode) {
|
|
static int oldx = 0;
|
|
static int oldy = 0;
|
|
Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
|
|
|
|
LIMIT(oldx, 0, term.col-1);
|
|
LIMIT(oldy, 0, term.row-1);
|
|
|
|
if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
|
|
g.c = term.line[term.c.y][term.c.x].c;
|
|
/* remove the old cursor */
|
|
if(term.line[oldy][oldx].state & GLYPH_SET)
|
|
xdrawc(oldx, oldy, term.line[oldy][oldx]);
|
|
else
|
|
xclear(oldx, oldy, oldx, oldy);
|
|
/* draw the new one */
|
|
if(mode == CURSOR_DRAW) {
|
|
xdrawc(term.c.x, term.c.y, g);
|
|
oldx = term.c.x, oldy = term.c.y;
|
|
}
|
|
}
|
|
|
|
void
|
|
draw(int redraw_all) {
|
|
int i, x, y, ox;
|
|
Glyph base, new;
|
|
char buf[DRAW_BUF_SIZ];
|
|
|
|
for(y = 0; y < term.row; y++) {
|
|
base = term.line[y][0];
|
|
i = ox = 0;
|
|
for(x = 0; x < term.col; x++) {
|
|
new = term.line[y][x];
|
|
if(!ATTRCMP(base, new) && i < DRAW_BUF_SIZ)
|
|
buf[i++] = new.c;
|
|
else {
|
|
xdraws(buf, base, ox, y, i);
|
|
buf[0] = new.c;
|
|
i = 1;
|
|
ox = x;
|
|
base = new;
|
|
}
|
|
}
|
|
xdraws(buf, base, ox, y, i);
|
|
}
|
|
if(!term.c.hidden)
|
|
xcursor(CURSOR_DRAW);
|
|
}
|
|
|
|
void
|
|
expose(XEvent *ev) {
|
|
draw(SCREEN_REDRAW);
|
|
}
|
|
|
|
char*
|
|
kmap(KeySym k) {
|
|
int i;
|
|
for(i = 0; i < LEN(key); i++)
|
|
if(key[i].k == k)
|
|
return (char*)key[i].s;
|
|
return NULL;
|
|
}
|
|
|
|
void
|
|
kpress(XEvent *ev) {
|
|
XKeyEvent *e = &ev->xkey;
|
|
KeySym ksym;
|
|
char buf[32];
|
|
char *customkey;
|
|
int len;
|
|
int meta;
|
|
int shift;
|
|
|
|
meta = e->state & Mod1Mask;
|
|
shift = e->state & ShiftMask;
|
|
len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
|
|
|
|
if(customkey = kmap(ksym))
|
|
ttywrite(customkey, strlen(customkey));
|
|
else if(len > 0) {
|
|
buf[sizeof(buf)-1] = '\0';
|
|
if(meta && len == 1)
|
|
ttywrite("\033", 1);
|
|
ttywrite(buf, len);
|
|
} else
|
|
switch(ksym) {
|
|
case XK_Up:
|
|
case XK_Down:
|
|
case XK_Left:
|
|
case XK_Right:
|
|
sprintf(buf, "\033%c%c", term.mode & MODE_APPKEYPAD ? 'O' : '[', "DACB"[ksym - XK_Left]);
|
|
ttywrite(buf, 3);
|
|
break;
|
|
case XK_Insert:
|
|
if(shift)
|
|
/* XXX: paste X clipboard */;
|
|
break;
|
|
default:
|
|
fprintf(stderr, "errkey: %d\n", (int)ksym);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
resize(XEvent *e) {
|
|
int col, row;
|
|
col = e->xconfigure.width / xw.cw;
|
|
row = e->xconfigure.height / xw.ch;
|
|
|
|
if(term.col != col || term.row != row) {
|
|
tresize(col, row);
|
|
ttyresize(col, row);
|
|
xw.w = e->xconfigure.width;
|
|
xw.h = e->xconfigure.height;
|
|
draw(SCREEN_REDRAW);
|
|
}
|
|
}
|
|
|
|
void
|
|
run(void) {
|
|
XEvent ev;
|
|
fd_set rfd;
|
|
int xfd = XConnectionNumber(xw.dis);
|
|
|
|
running = 1;
|
|
XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
|
|
XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* fix resize bug in wmii (?) */
|
|
|
|
while(running) {
|
|
FD_ZERO(&rfd);
|
|
FD_SET(cmdfd, &rfd);
|
|
FD_SET(xfd, &rfd);
|
|
if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
|
|
if(errno == EINTR)
|
|
continue;
|
|
die("select failed: %s\n", SERRNO);
|
|
}
|
|
if(FD_ISSET(cmdfd, &rfd)) {
|
|
ttyread();
|
|
draw(SCREEN_UPDATE);
|
|
}
|
|
while(XPending(xw.dis)) {
|
|
XNextEvent(xw.dis, &ev);
|
|
if(handler[ev.type])
|
|
(handler[ev.type])(&ev);
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[]) {
|
|
if(argc == 2 && !strncmp("-v", argv[1], 3))
|
|
die("st-" VERSION ", © 2009 st engineers\n");
|
|
else if(argc != 1)
|
|
die("usage: st [-v]\n");
|
|
setlocale(LC_CTYPE, "");
|
|
tnew(80, 24);
|
|
ttynew();
|
|
xinit();
|
|
run();
|
|
return 0;
|
|
}
|