#include <X11/keysym.h>
#include <X11/Xutil.h>
-#define TNAME "st"
+#define TNAME "xterm"
/* Arbitrary sizes */
+#define TITLESIZ 256
#define ESCSIZ 256
-#define ESCARG 16
+#define ESCARGSIZ 16
#define MAXDRAWBUF 1024
#define SERRNO strerror(errno)
enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4 };
enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSwrap, CSsave, CSload };
enum { CRset=1, CRupdate=2 };
-enum { TMwrap=1, TMinsert=2 };
+enum { TMwrap=1, TMinsert=2, TMtitle=4 };
+enum { ESCin = 1, ESCcsi = 2, ESCosc = 4, ESCtitle = 8 };
enum { SCupdate, SCredraw };
typedef int Color;
int y;
} TCursor;
-/* Escape sequence structs */
-/* ESC <pre> [[ [<priv>] <arg> [;]] <mode>] */
+/* CSI Escape sequence structs */
+/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
typedef struct {
- char buf[ESCSIZ+1]; /* raw string */
+ char buf[ESCSIZ]; /* raw string */
int len; /* raw string length */
- char pre;
char priv;
- int arg[ESCARG+1];
+ int arg[ESCARGSIZ];
int narg; /* nb of args */
char mode;
-} Escseq;
+} CSIEscape;
/* Internal representation of the screen */
typedef struct {
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 */
static void sigchld(int);
static void run(void);
-static int escaddc(char);
-static int escfinal(char);
-static void escdump(void);
-static void eschandle(void);
-static void escparse(void);
-static void escreset(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 DC dc;
static XWindow xw;
static Term term;
-static Escseq escseq;
+static CSIEscape escseq;
static int cmdfd;
static pid_t pid;
static int running;
void
dump(char c) {
static int col;
- fprintf(stderr, " %02x %c ", c, isprint(c)?c:'.');
+ fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
if(++col % 10 == 0)
fprintf(stderr, "\n");
}
fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
}
-int
-escfinal(char c) {
- if(escseq.len == 1)
- switch(c) {
- case '[':
- case ']':
- case '(':
- return 0;
- case '=':
- case '>':
- default:
- return 1;
- }
- else if(BETWEEN(c, 0x40, 0x7E))
- return 1;
- return 0;
-}
-
void
tcpos(int mode) {
static int x = 0;
tmoveto(0, y);
}
-int
-escaddc(char c) {
- escseq.buf[escseq.len++] = c;
- if(escfinal(c) || escseq.len >= ESCSIZ) {
- escparse(), eschandle();
- return 0;
- }
- return 1;
-}
-
void
-escparse(void) {
+csiparse(void) {
/* int noarg = 1; */
char *p = escseq.buf;
escseq.narg = 0;
- switch(escseq.pre = *p++) {
- case '[': /* CSI */
- 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++, p++;
- else {
- escseq.mode = *p;
- escseq.narg++;
- return;
- }
+ 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;
}
- break;
- case '(':
- /* XXX: graphic character set */
- break;
}
}
}
void
-eschandle(void) {
- switch(escseq.pre) {
+csihandle(void) {
+ switch(escseq.mode) {
default:
- goto unknown_seq;
- case '[':
- switch(escseq.mode) {
- default:
- unknown_seq:
- fprintf(stderr, "erresc: unknown sequence\n");
- escdump();
- 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);
+ 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 '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);
+ case 1: /* above */
+ tclearregion(0, 0, term.c.x, term.c.y);
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;
- }
+ 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 '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;
- }
+ case 1: /* left */
+ tclearregion(0, term.c.y, term.c.x, term.c.y);
break;
- case 'L': /* Insert <n> blank lines */
- DEFAULT(escseq.arg[0], 1);
- tinsertblankline(escseq.arg[0]);
+ case 2: /* all */
+ tclearregion(0, term.c.y, term.col-1, term.c.y);
break;
- case 'l':
- if(escseq.priv && escseq.arg[0] == 25)
+ }
+ break;
+ case 'S':
+ case 'L': /* Insert <n> blank lines */
+ DEFAULT(escseq.arg[0], 1);
+ tinsertblankline(escseq.arg[0]);
+ break;
+ case 'l':
+ if(escseq.priv && escseq.arg[0] == 25)
term.c.hidden = 1;
- break;
- case 'M': /* Delete <n> lines */
- DEFAULT(escseq.arg[0], 1);
- tdeleteline(escseq.arg[0]);
- break;
- case 'P': /* Delete <n> char */
- DEFAULT(escseq.arg[0], 1);
- tdeletechar(escseq.arg[0]);
- break;
- case 'd': /* Move to <row> */
+ 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 && escseq.arg[0] == 25)
+ term.c.hidden = 0;
+ break;
+ case 'm': /* Terminal attribute (color) */
+ tsetattr(escseq.arg, escseq.narg);
+ break;
+ case 'r':
+ if(escseq.priv)
+ ;
+ else {
DEFAULT(escseq.arg[0], 1);
- tmoveto(term.c.x, escseq.arg[0]-1);
- break;
- case 'h': /* Set terminal mode */
- if(escseq.priv && escseq.arg[0] == 25)
- term.c.hidden = 0;
- break;
- case 'm': /* Terminal attribute (color) */
- tsetattr(escseq.arg, escseq.narg);
- break;
- case 'r':
- if(escseq.priv)
- ;
- 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;
+ 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
-escdump(void) {
+csidump(void) {
int i;
- printf("rawbuf : %s\n", escseq.buf);
- printf("prechar : %c\n", escseq.pre);
- printf("private : %c\n", escseq.priv ? '?' : ' ');
- printf("narg : %d\n", escseq.narg);
+ printf("ESC [ %s", escseq.priv ? "? " : "");
if(escseq.narg)
for(i = 0; i < escseq.narg; i++)
- printf("\targ %d = %d\n", i, escseq.arg[i]);
- printf("mode : %c\n", escseq.mode);
+ printf("%d ", escseq.arg[i]);
+ if(escseq.mode)
+ putchar(escseq.mode);
+ putchar('\n');
}
void
-escreset(void) {
+csireset(void) {
memset(&escseq, 0, sizeof(escseq));
}
void
tputc(char c) {
- static int inesc = 0;
#if 0
dump(c);
#endif
- /* start of escseq */
- if(c == '\033')
- escreset(), inesc = 1;
- else if(inesc) {
- inesc = escaddc(c);
- } /* normal char */
- else switch(c) {
- default:
- tsetchar(c);
- tcursor(CSright);
- break;
+ 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 {
+ switch(c) {
+ case '[':
+ term.esc |= ESCcsi;
+ break;
+ case ']':
+ term.esc |= ESCosc;
+ break;
+ }
+ }
+ } else {
+ switch(c) {
case '\t':
tputtab();
break;
case '\a':
xbell();
break;
+ case '\033':
+ csireset();
+ term.esc = ESCin;
+ break;
+ default:
+ tsetchar(c);
+ tcursor(CSright);
+ break;
+ }
}
}
Got questions, comments, patches, etc.? Contact Jason Woofenden