#define X2COL(x) (((x) - BORDER)/xw.cw)
#define Y2ROW(y) (((y) - BORDER)/xw.ch)
+#define VT102ID "\033[?6c"
+
enum glyph_attribute {
ATTR_NULL = 0,
ATTR_REVERSE = 1,
ESC_STR = 4, /* DSC, OSC, PM, APC */
ESC_ALTCHARSET = 8,
ESC_STR_END = 16, /* a final string was encountered */
+ ESC_TEST = 32, /* Enter in test mode */
};
enum window_state {
static void tscrollup(int, int);
static void tscrolldown(int, int);
static void tsetattr(int*, int);
-static void tsetchar(char*);
+static void tsetchar(char *, Glyph *, int, int);
static void tsetscroll(int, int);
static void tswapscreen(void);
static void tsetdirt(int, int);
static int utf8size(char *);
static int isfullutf8(char *, int);
+static ssize_t xwrite(int, char *, size_t);
static void *xmalloc(size_t);
static void *xrealloc(void *, size_t);
static void *xcalloc(size_t nmemb, size_t size);
static char *opt_class = NULL;
static char *opt_font = NULL;
+
+ssize_t
+xwrite(int fd, char *s, size_t len) {
+ size_t aux = len;
+
+ while(len > 0) {
+ ssize_t r = write(fd, s, len);
+ if(r < 0)
+ return r;
+ len -= r;
+ s += r;
+ }
+ return aux;
+}
+
void *
xmalloc(size_t len) {
void *p = malloc(len);
DEFAULT(envshell, SHELL);
putenv("TERM="TNAME);
- args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
+ args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
execvp(args[0], args);
exit(EXIT_FAILURE);
}
cmdfd = m;
signal(SIGCHLD, sigchld);
if(opt_io) {
- if(!strcmp(opt_io, "-")) {
- iofd = STDOUT_FILENO;
- } else {
- if((iofd = open(opt_io, O_WRONLY | O_CREAT, 0666)) < 0) {
- fprintf(stderr, "Error opening %s:%s\n",
- opt_io, strerror(errno));
- }
+ iofd = (!strcmp(opt_io, "-")) ?
+ STDOUT_FILENO :
+ open(opt_io, O_WRONLY | O_CREAT, 0666);
+ if(iofd < 0) {
+ fprintf(stderr, "Error opening %s:%s\n",
+ opt_io, strerror(errno));
}
}
}
}
void
-tsetchar(char *c) {
- char *vt100_0[62] = { /* 0x41 - 0x7e */
+tsetchar(char *c, Glyph *attr, int x, int y) {
+ static char *vt100_0[62] = { /* 0x41 - 0x7e */
"↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
/*
* The table is proudly stolen from rxvt.
*/
- if(term.c.attr.mode & ATTR_GFX) {
+ if(attr->mode & ATTR_GFX) {
if(c[0] >= 0x41 && c[0] <= 0x7e
&& vt100_0[c[0] - 0x41]) {
c = vt100_0[c[0] - 0x41];
}
}
- term.dirty[term.c.y] = 1;
- term.line[term.c.y][term.c.x] = term.c.attr;
- memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
- term.line[term.c.y][term.c.x].state |= GLYPH_SET;
+ term.dirty[y] = 1;
+ term.line[y][x] = *attr;
+ memcpy(term.line[y][x].c, c, UTF_SIZ);
+ term.line[y][x].state |= GLYPH_SET;
}
void
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
break;
+ case 'c': /* DA -- Device Attributes */
+ if(csiescseq.arg[0] == 0)
+ ttywrite(VT102ID, sizeof(VT102ID) - 1);
+ break;
case 'C': /* CUF -- Cursor <n> Forward */
case 'a':
DEFAULT(csiescseq.arg[0], 1);
void
tputc(char *c, int len) {
uchar ascii = *c;
-
- if(iofd != -1)
- write(iofd, c, len);
-
- switch(ascii) {
- case '\t': /* HT */
- tputtab(1);
- return;
- case '\b': /* BS */
- tmoveto(term.c.x-1, term.c.y);
- return;
- case '\r': /* CR */
- tmoveto(0, term.c.y);
- return;
- case '\f': /* LF */
- case '\v': /* VT */
- case '\n': /* LF */
- /* go to first col if the mode is set */
- tnewline(IS_SET(MODE_CRLF));
- return;
- case '\a': /* BEL */
- if(term.esc & ESC_STR)
+ bool control = ascii < '\x20' || ascii == 0177;
+
+ if(iofd != -1) {
+ if (xwrite(iofd, c, len) < 0) {
+ fprintf(stderr, "Error writting in %s:%s\n",
+ opt_io, strerror(errno));
+ close(iofd);
+ iofd = -1;
+ }
+ }
+ /*
+ * STR sequences must be checked before of anything
+ * because it can use some control codes as part of the sequence
+ */
+ if(term.esc & ESC_STR) {
+ switch(ascii) {
+ case '\033':
+ term.esc = ESC_START | ESC_STR_END;
break;
- if(!(xw.state & WIN_FOCUSED))
- xseturgency(1);
- return;
- case '\033': /* ESC */
- csireset();
- term.esc = ESC_START;
- return;
- case '\016': /* XXX: SO */
- case '\017': /* XXX: SI */
- break;
- case '\032': /* SUB */
- case '\030': /* CAN */
- csireset();
+ case '\a': /* backwards compatibility to xterm */
+ term.esc = 0;
+ strhandle();
+ break;
+ default:
+ strescseq.buf[strescseq.len++] = ascii;
+ if(strescseq.len+1 >= STR_BUF_SIZ) {
+ term.esc = 0;
+ strhandle();
+ }
+ }
return;
- default:
- /* case '\005': ENQ (IGNORED) */
- /* case '\000': NUL (IGNORED) */
- /* case '\021': XON (IGNORED) */
- /* case '\023': XOFF (IGNORED) */
- /* case 0177: DEL (IGNORED) */
- break;
}
-
- if(term.esc & ESC_START) {
+ /*
+ * Actions of control codes must be performed as soon they arrive
+ * because they can be embedded inside a control sequence, and
+ * they must not cause conflicts with sequences.
+ */
+ if(control) {
+ switch(ascii) {
+ case '\t': /* HT */
+ tputtab(1);
+ return;
+ case '\b': /* BS */
+ tmoveto(term.c.x-1, term.c.y);
+ return;
+ case '\r': /* CR */
+ tmoveto(0, term.c.y);
+ return;
+ case '\f': /* LF */
+ case '\v': /* VT */
+ case '\n': /* LF */
+ /* go to first col if the mode is set */
+ tnewline(IS_SET(MODE_CRLF));
+ return;
+ case '\a': /* BEL */
+ if(!(xw.state & WIN_FOCUSED))
+ xseturgency(1);
+ return;
+ case '\033': /* ESC */
+ csireset();
+ term.esc = ESC_START;
+ return;
+ case '\016': /* SO */
+ term.c.attr.mode |= ATTR_GFX;
+ return;
+ case '\017': /* SI */
+ term.c.attr.mode &= ~ATTR_GFX;
+ return;
+ case '\032': /* SUB */
+ case '\030': /* CAN */
+ csireset();
+ return;
+ case '\005': /* ENQ (IGNORED) */
+ case '\000': /* NUL (IGNORED) */
+ case '\021': /* XON (IGNORED) */
+ case '\023': /* XOFF (IGNORED) */
+ case 0177: /* DEL (IGNORED) */
+ return;
+ }
+ } else if(term.esc & ESC_START) {
if(term.esc & ESC_CSI) {
csiescseq.buf[csiescseq.len++] = ascii;
if(BETWEEN(ascii, 0x40, 0x7E)
term.esc = 0;
csiparse(), csihandle();
}
- } else if(term.esc & ESC_STR) {
- switch(ascii) {
- case '\033':
- term.esc = ESC_START | ESC_STR_END;
- break;
- case '\a': /* backwards compatibility to xterm */
- term.esc = 0;
- strhandle();
- break;
- default:
- strescseq.buf[strescseq.len++] = ascii;
- if(strescseq.len+1 >= STR_BUF_SIZ) {
- term.esc = 0;
- strhandle();
- }
- }
} else if(term.esc & ESC_STR_END) {
term.esc = 0;
if(ascii == '\\')
fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
}
term.esc = 0;
+ } else if(term.esc & ESC_TEST) {
+ if(ascii == '8') { /* DEC screen alignment test. */
+ char E[UTF_SIZ] = "E";
+ int x, y;
+
+ for(x = 0; x < term.col; ++x) {
+ for(y = 0; y < term.row; ++y)
+ tsetchar(E, &term.c.attr, x, y);
+ }
+ }
+ term.esc = 0;
} else {
switch(ascii) {
case '[':
term.esc |= ESC_CSI;
break;
+ case '#':
+ term.esc |= ESC_TEST;
+ break;
case 'P': /* DCS -- Device Control String */
case '_': /* APC -- Application Program Command */
case '^': /* PM -- Privacy Message */
}
term.esc = 0;
break;
+ case 'Z': /* DECID -- Identify Terminal */
+ ttywrite(VT102ID, sizeof(VT102ID) - 1);
+ term.esc = 0;
+ break;
case 'c': /* RIS -- Reset to inital state */
treset();
term.esc = 0;
term.esc = 0;
}
}
- } else {
- if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
- sel.bx = -1;
- if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
- if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
- tnewline(1); /* always go to first col */
- tsetchar(c);
- if(term.c.x+1 < term.col) {
- tmoveto(term.c.x+1, term.c.y);
- } else {
- term.c.state |= CURSOR_WRAPNEXT;
- }
- }
+ /*
+ * All characters which forms part of a sequence are not
+ * printed
+ */
+ return;
}
+ /*
+ * Display control codes only if we are in graphic mode
+ */
+ if(control && !(term.c.attr.mode & ATTR_GFX))
+ return;
+ if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
+ sel.bx = -1;
+ if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
+ tnewline(1); /* always go to first col */
+ tsetchar(c, &term.c.attr, term.c.x, term.c.y);
+ if(term.c.x+1 < term.col)
+ tmoveto(term.c.x+1, term.c.y);
+ else
+ term.c.state |= CURSOR_WRAPNEXT;
}
int
* Those ranges will not be brightened:
* 8 - 15 – bright system colors
* 196 - 231 – highest 256 color cube
- * 252 - 255 – brightest colors in grescale
+ * 252 - 255 – brightest colors in greyscale
*/
font = &dc.bfont;
}
}
if(x + charlen >= term.col-1) {
xclear(winx + width, (y == 0)? 0 : winy, xw.w,
- winy + xw.ch + (y == term.row-1)? xw.h : 0);
+ (y == term.row-1)? xw.h : (winy + xw.ch));
}
if(y == 0)
xclear(winx, 0, winx + width, BORDER);
Got questions, comments, patches, etc.? Contact Jason Woofenden