-/* See LICENSE file for copyright and license details. */
+/* See LICENSE for licence details. */
+#define _XOPEN_SOURCE 600
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.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>
-int
-main(int argc, char *argv[]) {
- if(argc == 2 && !strcmp("-v", argv[1])) {
- fprintf(stderr, "st-"VERSION", © 2007-2008 st engineers, see LICENSE for details\n");
- exit(EXIT_SUCCESS);
+#define TNAME "xterm"
+
+/* Arbitrary sizes */
+#define TITLESIZ 256
+#define ESCSIZ 256
+#define ESCARGSIZ 16
+#define MAXDRAWBUF 1024
+
+#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)
+#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
+
+/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
+enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4, ATgfx=8 };
+enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSsave, CSload };
+enum { CRset=1, CRupdate=2 };
+enum { TMwrap=1, TMinsert=2 };
+enum { ESCin=1, ESCcsi=2, ESCosc=4, ESCtitle=8, ESCcharset=16 };
+enum { SCupdate, SCredraw };
+
+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;
+
+/* CSI Escape sequence structs */
+/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
+typedef struct {
+ char buf[ESCSIZ]; /* raw string */
+ int len; /* raw string length */
+ char priv;
+ int arg[ESCARGSIZ];
+ int narg; /* nb of args */
+ char mode;
+} CSIEscape;
+
+/* 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 */
+ int esc;
+ char title[TITLESIZ];
+ int titlelen;
+} 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;
+
+typedef struct {
+ KeySym k;
+ char s[ESCSIZ];
+} Key;
+
+#include "config.h"
+
+/* Drawing Context */
+typedef struct {
+ unsigned long col[LEN(colorname)];
+ XFontStruct* font;
+ GC gc;
+} DC;
+
+static void die(const char *errstr, ...);
+static void draw(int);
+static void execsh(void);
+static void sigchld(int);
+static void run(void);
+
+static void csidump(void);
+static void csihandle(void);
+static void csiparse(void);
+static void csireset(void);
+
+static void tclearregion(int, int, int, int);
+static void tcpos(int);
+static void tcursor(int);
+static void tdeletechar(int);
+static void tdeleteline(int);
+static void tinsertblank(int);
+static void tinsertblankline(int);
+static void tmoveto(int, int);
+static void tnew(int, int);
+static void tnewline(void);
+static void tputc(char);
+static void tputs(char*, int);
+static void tresize(int, int);
+static void tscroll(void);
+static void tsetattr(int*, int);
+static void tsetchar(char);
+static void tsetscroll(int, int);
+
+static void ttynew(void);
+static void ttyread(void);
+static void ttyresize(int, int);
+static void ttywrite(const char *, size_t);
+
+static unsigned long xgetcol(const char *);
+static void xclear(int, int, int, int);
+static void xcursor(int);
+static void xdrawc(int, int, Glyph);
+static void xinit(void);
+static void xscroll(void);
+
+static void expose(XEvent *);
+static char * kmap(KeySym);
+static void kpress(XEvent *);
+static void resize(XEvent *);
+
+static void (*handler[LASTEvent])(XEvent *) = {
+ [KeyPress] = kpress,
+ [Expose] = expose,
+ [ConfigureNotify] = resize
+};
+
+/* Globals */
+static DC dc;
+static XWindow xw;
+static Term term;
+static CSIEscape escseq;
+static int cmdfd;
+static pid_t pid;
+static int running;
+
+#ifdef DEBUG
+void
+tdump(void) {
+ int row, col;
+ Glyph c;
+
+ for(row = 0; row < term.row; row++) {
+ for(col = 0; col < term.col; col++) {
+ if(col == term.c.x && row == term.c.y)
+ putchar('#');
+ else {
+ c = term.line[row][col];
+ putchar(c.state & CRset ? c.c : '.');
+ }
+ }
+ putchar('\n');
}
- else if(argc != 1) {
- fprintf(stderr, "usage: st [-v]\n");
+}
+#endif
+
+void
+die(const char *errstr, ...) {
+ va_list ap;
+
+ va_start(ap, errstr);
+ vfprintf(stderr, errstr, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
+}
+
+void
+execsh(void) {
+ char *args[3] = {SHELL, "-i", NULL};
+ putenv("TERM=" TNAME);
+ execvp(SHELL, args);
+}
+
+void
+xbell(void) { /* visual bell */
+ XRectangle r = { 0, 0, xw.w, xw.h };
+ XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
+ XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
+ /* usleep(30000); */
+ draw(SCredraw);
+}
+
+void
+sigchld(int a) {
+ int stat = 0;
+ if(waitpid(pid, &stat, 0) < 0)
+ die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
+ if(WIFEXITED(stat))
+ exit(WEXITSTATUS(stat));
+ else
exit(EXIT_FAILURE);
+}
+
+void
+ttynew(void) {
+ int m, s;
+ char *pts;
+
+ if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
+ die("openpt failed: %s\n", SERRNO);
+ if(grantpt(m) < 0)
+ die("grandpt failed: %s\n", SERRNO);
+ if(unlockpt(m) < 0)
+ die("unlockpt failed: %s\n", SERRNO);
+ if(!(pts = ptsname(m)))
+ die("ptsname failed: %s\n", SERRNO);
+ if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
+ die("Couldn't open slave: %s\n", SERRNO);
+ fcntl(s, F_SETFL, O_NDELAY);
+ switch(pid = fork()) {
+ case -1:
+ die("fork failed\n");
+ break;
+ case 0:
+ setsid(); /* create a new process group */
+ dup2(s, STDIN_FILENO);
+ dup2(s, STDOUT_FILENO);
+ dup2(s, STDERR_FILENO);
+ if(ioctl(s, TIOCSCTTY, NULL) < 0)
+ die("ioctl TTIOCSTTY failed: %s\n", SERRNO);
+ execsh();
+ break;
+ default:
+ close(s);
+ cmdfd = m;
+ signal(SIGCHLD, sigchld);
+ }
+}
+
+void
+dump(char c) {
+ static int col;
+ fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
+ if(++col % 10 == 0)
+ fprintf(stderr, "\n");
+}
+
+void
+ttyread(void) {
+ char buf[BUFSIZ] = {0};
+ int ret;
+
+ switch(ret = read(cmdfd, buf, BUFSIZ)) {
+ case -1:
+ die("Couldn't read from shell: %s\n", SERRNO);
+ break;
+ default:
+ tputs(buf, ret);
+ }
+}
+
+void
+ttywrite(const char *s, size_t n) {
+ if(write(cmdfd, s, n) == -1)
+ die("write error on tty: %s\n", SERRNO);
+}
+
+void
+ttyresize(int x, int y) {
+ struct winsize w;
+
+ w.ws_row = term.row;
+ w.ws_col = term.col;
+ w.ws_xpixel = w.ws_ypixel = 0;
+ if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
+ fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
+}
+
+void
+tcpos(int mode) {
+ static int x = 0;
+ static int y = 0;
+
+ if(mode == CSsave)
+ x = term.c.x, y = term.c.y;
+ else if(mode == CSload)
+ tmoveto(x, y);
+}
+
+void
+tnew(int col, int row) { /* screen size */
+ term.row = row, term.col = col;
+ term.top = 0, term.bot = term.row - 1;
+ /* mode */
+ term.mode = TMwrap;
+ /* cursor */
+ term.c.attr.mode = ATnone;
+ term.c.attr.fg = DefaultFG;
+ term.c.attr.bg = DefaultBG;
+ term.c.x = term.c.y = 0;
+ term.c.hidden = 0;
+ /* allocate screen */
+ term.line = calloc(term.row, sizeof(Line));
+ for(row = 0 ; row < term.row; row++)
+ term.line[row] = calloc(term.col, sizeof(Glyph));
+}
+
+void
+tscroll(void) {
+ Line temp = term.line[term.top];
+ int i;
+ /* X stuff _before_ the line swapping (results in wrong line index) */
+ xscroll();
+ for(i = term.top; i < term.bot; i++)
+ term.line[i] = term.line[i+1];
+ memset(temp, 0, sizeof(Glyph) * term.col);
+ term.line[term.bot] = temp;
+}
+
+void
+tnewline(void) {
+ int y = term.c.y + 1;
+ if(y > term.bot)
+ tscroll(), y = term.bot;
+ tmoveto(0, y);
+}
+
+void
+csiparse(void) {
+ /* int noarg = 1; */
+ char *p = escseq.buf;
+
+ escseq.narg = 0;
+ if(*p == '?')
+ escseq.priv = 1, p++;
+
+ while(p < escseq.buf+escseq.len) {
+ while(isdigit(*p)) {
+ escseq.arg[escseq.narg] *= 10;
+ escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
+ }
+ if(*p == ';' && escseq.narg+1 < ESCARGSIZ)
+ escseq.narg++, p++;
+ else {
+ escseq.mode = *p;
+ escseq.narg++;
+ return;
+ }
+ }
+}
+
+void
+tmoveto(int x, int y) {
+ term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
+ term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
+}
+
+void
+tcursor(int dir) {
+ int xf = term.c.x, yf = term.c.y;
+
+ switch(dir) {
+ case CSup:
+ yf--;
+ break;
+ case CSdown:
+ yf++;
+ break;
+ case CSleft:
+ xf--;
+ if(term.mode & TMwrap && xf < 0) {
+ xf = term.col-1, yf--;
+ if(yf < term.top)
+ yf = term.top, xf = 0;
+ }
+ break;
+ case CSright:
+ xf++;
+ if(term.mode & TMwrap && xf >= term.col) {
+ xf = 0, yf++;
+ if(yf > term.bot)
+ yf = term.bot, tscroll();
+ }
+ break;
+ }
+ tmoveto(xf, yf);
+}
+
+void
+tsetchar(char c) {
+ term.line[term.c.y][term.c.x] = term.c.attr;
+ term.line[term.c.y][term.c.x].c = c;
+ term.line[term.c.y][term.c.x].state |= CRset | CRupdate;
+}
+
+void
+tclearregion(int x1, int y1, int x2, int y2) {
+ int x, y;
+
+ LIMIT(x1, 0, term.col-1);
+ LIMIT(x2, 0, term.col-1);
+ LIMIT(y1, 0, term.row-1);
+ LIMIT(y2, 0, term.row-1);
+
+ /* XXX: could be optimized */
+ for(x = x1; x <= x2; x++)
+ for(y = y1; y <= y2; y++)
+ memset(&term.line[y][x], 0, sizeof(Glyph));
+
+ xclear(x1, y1, x2, y2);
+}
+
+void
+tdeletechar(int n) {
+ int src = term.c.x + n;
+ int dst = term.c.x;
+ int size = term.col - src;
+
+ if(src >= term.col) {
+ tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+ return;
+ }
+ memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
+ tclearregion(term.col-size, term.c.y, term.col-1, term.c.y);
+}
+
+void
+tinsertblank(int n) {
+ int src = term.c.x;
+ int dst = src + n;
+ int size = term.col - n - src;
+
+ if(dst >= term.col) {
+ tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+ return;
+ }
+ memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
+ tclearregion(src, term.c.y, dst, term.c.y);
+}
+
+void
+tsetlinestate(int n, int state) {
+ int i;
+ for(i = 0; i < term.col; i++)
+ term.line[n][i].state |= state;
+}
+
+void
+tinsertblankline (int n) {
+ int i;
+ Line blank;
+ int bot = term.bot;
+
+ if(term.c.y > term.bot)
+ bot = term.row - 1;
+ else if(term.c.y < term.top)
+ bot = term.top - 1;
+ if(term.c.y + n >= bot) {
+ tclearregion(0, term.c.y, term.col-1, bot);
+ return;
+ }
+ for(i = bot; i >= term.c.y+n; i--) {
+ /* swap deleted line <-> blanked line */
+ blank = term.line[i];
+ term.line[i] = term.line[i-n];
+ term.line[i-n] = blank;
+ /* blank it */
+ memset(blank, 0, term.col * sizeof(Glyph));
+ tsetlinestate(i, CRupdate);
+ tsetlinestate(i-n, CRupdate);
+ }
+}
+
+void
+tdeleteline(int n) {
+ int i;
+ Line blank;
+ int bot = term.bot;
+
+ if(term.c.y > term.bot)
+ bot = term.row - 1;
+ else if(term.c.y < term.top)
+ bot = term.top - 1;
+ if(term.c.y + n >= bot) {
+ tclearregion(0, term.c.y, term.col-1, bot);
+ return;
+ }
+ for(i = term.c.y; i <= bot-n; i++) {
+ /* swap deleted line <-> blanked line */
+ blank = term.line[i];
+ term.line[i] = term.line[i+n];
+ term.line[i+n] = blank;
+ /* blank it */
+ memset(blank, 0, term.col * sizeof(Glyph));
+ tsetlinestate(i, CRupdate);
+ tsetlinestate(i-n, CRupdate);
+ }
+}
+
+void
+tsetattr(int *attr, int l) {
+ int i;
+
+ for(i = 0; i < l; i++) {
+ switch(attr[i]) {
+ case 0:
+ term.c.attr.mode &= ~(ATreverse | ATunderline | ATbold);
+ term.c.attr.fg = DefaultFG;
+ term.c.attr.bg = DefaultBG;
+ break;
+ case 1:
+ term.c.attr.mode |= ATbold;
+ break;
+ case 4:
+ term.c.attr.mode |= ATunderline;
+ break;
+ case 7:
+ term.c.attr.mode |= ATreverse;
+ break;
+ case 8:
+ term.c.hidden = CShide;
+ break;
+ case 22:
+ term.c.attr.mode &= ~ATbold;
+ break;
+ case 24:
+ term.c.attr.mode &= ~ATunderline;
+ break;
+ case 27:
+ term.c.attr.mode &= ~ATreverse;
+ 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) {
+ if(escseq.priv)
+ csidump();
+ switch(escseq.mode) {
+ unknown:
+ default:
+ fprintf(stderr, "erresc: unknown sequence\n");
+ csidump();
+ /* die(""); */
+ break;
+ case '@': /* Insert <n> blank char */
+ DEFAULT(escseq.arg[0], 1);
+ tinsertblank(escseq.arg[0]);
+ break;
+ case 'A': /* Cursor <n> Up */
+ case 'e':
+ DEFAULT(escseq.arg[0], 1);
+ tmoveto(term.c.x, term.c.y-escseq.arg[0]);
+ break;
+ case 'B': /* Cursor <n> Down */
+ DEFAULT(escseq.arg[0], 1);
+ tmoveto(term.c.x, term.c.y+escseq.arg[0]);
+ break;
+ case 'C': /* Cursor <n> Forward */
+ case 'a':
+ DEFAULT(escseq.arg[0], 1);
+ tmoveto(term.c.x+escseq.arg[0], term.c.y);
+ break;
+ case 'D': /* Cursor <n> Backward */
+ DEFAULT(escseq.arg[0], 1);
+ tmoveto(term.c.x-escseq.arg[0], term.c.y);
+ break;
+ case 'E': /* Cursor <n> Down and first col */
+ DEFAULT(escseq.arg[0], 1);
+ tmoveto(0, term.c.y+escseq.arg[0]);
+ break;
+ case 'F': /* Cursor <n> Up and first col */
+ DEFAULT(escseq.arg[0], 1);
+ tmoveto(0, term.c.y-escseq.arg[0]);
+ break;
+ case 'G': /* Move to <col> */
+ case '`':
+ DEFAULT(escseq.arg[0], 1);
+ tmoveto(escseq.arg[0]-1, term.c.y);
+ break;
+ case 'H': /* Move to <row> <col> */
+ case 'f':
+ DEFAULT(escseq.arg[0], 1);
+ DEFAULT(escseq.arg[1], 1);
+ tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
+ break;
+ case 'J': /* 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;
+ }
+ break;
+ case 'K': /* 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':
+ case 'L': /* Insert <n> blank lines */
+ DEFAULT(escseq.arg[0], 1);
+ tinsertblankline(escseq.arg[0]);
+ break;
+ case 'l':
+ if(escseq.priv) {
+ switch(escseq.arg[0]) {
+ case 7:
+ term.mode &= ~TMwrap;
+ break;
+ case 25:
+ term.c.hidden = 1;
+ break;
+ }
+ }
+ break;
+ case 'M': /* Delete <n> lines */
+ DEFAULT(escseq.arg[0], 1);
+ tdeleteline(escseq.arg[0]);
+ break;
+ case 'X':
+ case 'P': /* Delete <n> char */
+ DEFAULT(escseq.arg[0], 1);
+ tdeletechar(escseq.arg[0]);
+ break;
+ case 'd': /* Move to <row> */
+ DEFAULT(escseq.arg[0], 1);
+ tmoveto(term.c.x, escseq.arg[0]-1);
+ break;
+ case 'h': /* Set terminal mode */
+ if(escseq.priv)
+ switch(escseq.arg[0]) {
+ case 7:
+ term.mode |= TMwrap;
+ break;
+ case 25:
+ term.c.hidden = 0;
+ break;
+ case 1034:
+ /* XXX: Interpret "meta" key, sets eighth bit. */
+ break;
+ }
+ break;
+ case 'm': /* Terminal attribute (color) */
+ tsetattr(escseq.arg, escseq.narg);
+ break;
+ case 'r':
+ 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': /* Save cursor position */
+ tcpos(CSsave);
+ break;
+ case 'u': /* Load cursor position */
+ tcpos(CSload);
+ 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--)
+ tcursor(CSright);
+}
+
+void
+tputc(char c) {
+#if 0
+ dump(c);
+#endif
+ if(term.esc & ESCin) {
+ if(term.esc & ESCcsi) {
+ escseq.buf[escseq.len++] = c;
+ if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESCSIZ) {
+ term.esc = 0;
+ csiparse(), csihandle();
+ }
+ } else if (term.esc & ESCosc) {
+ if(c == ';') {
+ term.titlelen = 0;
+ term.esc = ESCin | ESCtitle;
+ }
+ } else if(term.esc & ESCtitle) {
+ if(c == '\a' || term.titlelen+1 >= TITLESIZ) {
+ 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 & ESCcharset) {
+ printf("ESC ( %c\n", c);
+ switch(c) {
+ case '0': /* Line drawing crap */
+ term.c.attr.mode |= ATgfx;
+ break;
+ case 'B': /* Back to regular text */
+ term.c.attr.mode &= ~ATgfx;
+ break;
+ }
+ term.esc = 0;
+ } else {
+ switch(c) {
+ case '[':
+ term.esc |= ESCcsi;
+ break;
+ case ']':
+ term.esc |= ESCosc;
+ break;
+ case '(':
+ term.esc |= ESCcharset;
+ break;
+ case 'A':
+ tmoveto(term.c.x, term.c.y-1);
+ break;
+ case 'B':
+ tmoveto(term.c.x, term.c.y+1);
+ break;
+ case 'C':
+ tmoveto(term.c.x+1, term.c.y);
+ break;
+ case 'D':
+ tmoveto(term.c.x-1, term.c.y);
+ break;
+ default:
+ fprintf(stderr, "erresc: unknown sequence ESC %02X '%c'\n", c, isprint(c)?c:'.');
+ }
+ }
+ } else {
+ switch(c) {
+ case '\t':
+ tputtab();
+ break;
+ case '\b':
+ tcursor(CSleft);
+ break;
+ case '\r':
+ tmoveto(0, term.c.y);
+ break;
+ case '\n':
+ tnewline();
+ break;
+ case '\a':
+ xbell();
+ break;
+ case '\033':
+ csireset();
+ term.esc = ESCin;
+ break;
+ default:
+ tsetchar(c);
+ tcursor(CSright);
+ 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(CShide);
+ 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 = ATnone;
+ /* 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 & ATreverse)
+ 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 & ATgfx) {
+
+ 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 & ATunderline)
+ 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 & ATreverse)
+ 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 = {' ', ATnone, 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 & CRset)
+ g.c = term.line[term.c.y][term.c.x].c;
+ /* remove the old cursor */
+ if(term.line[oldy][oldx].state & CRset)
+ xdrawc(oldx, oldy, term.line[oldy][oldx]);
+ else
+ xclear(oldx, oldy, oldx, oldy);
+ /* draw the new one */
+ if(mode == CSdraw) {
+ 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[MAXDRAWBUF];
+
+ 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 < MAXDRAWBUF)
+ 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(CSdraw);
+}
+
+void
+expose(XEvent *ev) {
+ draw(SCredraw);
+}
+
+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_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(SCredraw);
+ }
+}
+
+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(SCupdate);
+ }
+ 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;
}
Got questions, comments, patches, etc.? Contact Jason Woofenden