X-Git-Url: https://git.xinqibao.xyz/st.git/blobdiff_plain/cdb3b1892af40110660da8c3f6fc06b1b054fd12..84f6dbffa5a26e1a2f94f844844d76f80dd6c5a0:/st.c?ds=inline

diff --git a/st.c b/st.c
index cad61bf..f91eb8d 100644
--- a/st.c
+++ b/st.c
@@ -36,10 +36,6 @@ char *argv0;
 
 #define Glyph Glyph_
 #define Font Font_
-#define Draw XftDraw *
-#define Colour XftColor
-#define Colourmap Colormap
-#define Rectangle XRectangle
 
 #if   defined(__linux)
  #include <pty.h>
@@ -55,6 +51,7 @@ char *argv0;
 #define XEMBED_FOCUS_OUT 5
 
 /* Arbitrary sizes */
+#define UTF_INVALID   0xFFFD
 #define UTF_SIZ       4
 #define ESC_BUF_SIZ   (128*UTF_SIZ)
 #define ESC_ARG_SIZ   16
@@ -68,10 +65,9 @@ char *argv0;
 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
 
 /* macros */
-#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 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)
@@ -79,6 +75,7 @@ char *argv0;
 #define IS_SET(flag) ((term.mode & (flag)) != 0)
 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
 #define CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
+#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
 
 #define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
 #define IS_TRUECOL(x)    (1 << 24 & (x))
@@ -134,6 +131,7 @@ enum term_mode {
 	MODE_MOUSEX10    = 131072,
 	MODE_MOUSEMANY   = 262144,
 	MODE_BRCKTPASTE  = 524288,
+	MODE_PRINT       = 1048576,
 	MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
 	                  |MODE_MOUSEMANY,
 };
@@ -178,6 +176,10 @@ typedef unsigned int uint;
 typedef unsigned long ulong;
 typedef unsigned short ushort;
 
+typedef XftDraw *Draw;
+typedef XftColor Colour;
+typedef Colormap Colourmap;
+
 typedef struct {
 	char c[UTF_SIZ]; /* character code */
 	ushort mode;      /* attribute flags */
@@ -248,7 +250,8 @@ typedef struct {
 	XSetWindowAttributes attrs;
 	int scr;
 	bool isfixed; /* is fixed geometry? */
-	int fx, fy, fw, fh; /* fixed geometry */
+	int l, t; /* left and top offset */
+	int gm; /* geometry mask */
 	int tw, th; /* tty width and height */
 	int w, h; /* window width and height */
 	int ch; /* char height */
@@ -296,13 +299,13 @@ typedef struct {
 
 typedef union {
 	int i;
-	unsigned int ui;
+	uint ui;
 	float f;
 	const void *v;
 } Arg;
 
 typedef struct {
-	unsigned int mod;
+	uint mod;
 	KeySym keysym;
 	void (*func)(const Arg *);
 	const Arg arg;
@@ -313,6 +316,9 @@ static void clippaste(const Arg *);
 static void numlock(const Arg *);
 static void selpaste(const Arg *);
 static void xzoom(const Arg *);
+static void printsel(const Arg *);
+static void printscreen(const Arg *) ;
+static void toggleprinter(const Arg *);
 
 /* Config.h for applying patches and the configuration. */
 #include "config.h"
@@ -355,6 +361,10 @@ static void strparse(void);
 static void strreset(void);
 
 static int tattrset(int);
+static void tprinter(char *, size_t);
+static void tdumpsel(void);
+static void tdumpline(int);
+static void tdump(void);
 static void tclearregion(int, int, int, int);
 static void tcursor(int);
 static void tdeletechar(int);
@@ -362,16 +372,16 @@ static void tdeleteline(int);
 static void tinsertblank(int);
 static void tinsertblankline(int);
 static void tmoveto(int, int);
-static void tmoveato(int x, int y);
+static void tmoveato(int, int);
 static void tnew(int, int);
 static void tnewline(int);
-static void tputtab(bool);
+static void tputtab(int);
 static void tputc(char *, int);
 static void treset(void);
 static int tresize(int, int);
 static void tscrollup(int, int);
 static void tscrolldown(int, int);
-static void tsetattr(int*, int);
+static void tsetattr(int *, int);
 static void tsetchar(char *, Glyph *, int, int);
 static void tsetscroll(int, int);
 static void tswapscreen(void);
@@ -397,6 +407,7 @@ static void xdrawcursor(void);
 static void xinit(void);
 static void xloadcols(void);
 static int xsetcolorname(int, const char *);
+static int xgeommasktogravity(int);
 static int xloadfont(Font *, FcPattern *);
 static void xloadfonts(char *, double);
 static int xloadfontset(Font *);
@@ -404,9 +415,9 @@ static void xsettitle(char *);
 static void xresettitle(void);
 static void xsetpointermotion(int);
 static void xseturgency(int);
-static void xsetsel(char*);
+static void xsetsel(char *);
 static void xtermclear(int, int, int, int);
-static void xunloadfont(Font *f);
+static void xunloadfont(Font *);
 static void xunloadfonts(void);
 static void xresize(int, int);
 
@@ -429,19 +440,22 @@ static void selrequest(XEvent *);
 static void selinit(void);
 static void selsort(void);
 static inline bool selected(int, int);
+static char *getsel(void);
 static void selcopy(void);
 static void selscroll(int, int);
 static void selsnap(int, int *, int *, int);
 
-static int utf8decode(char *, long *);
-static int utf8encode(long *, char *);
-static int utf8size(char *);
-static int isfullutf8(char *, int);
+static size_t utf8decode(char *, long *, size_t);
+static long utf8decodebyte(char, size_t *);
+static size_t utf8encode(long, char *, size_t);
+static char utf8encodebyte(long, size_t);
+static size_t utf8len(char *);
+static size_t utf8validate(long *, size_t);
 
-static ssize_t xwrite(int, char *, size_t);
+static ssize_t xwrite(int, const char *, size_t);
 static void *xmalloc(size_t);
 static void *xrealloc(void *, size_t);
-static char *xstrdup(char *s);
+static char *xstrdup(char *);
 
 static void (*handler[LASTEvent])(XEvent *) = {
 	[KeyPress] = kpress,
@@ -469,7 +483,7 @@ static STREscape strescseq;
 static int cmdfd;
 static pid_t pid;
 static Selection sel;
-static int iofd = -1;
+static int iofd = STDOUT_FILENO;
 static char **opt_cmd = NULL;
 static char *opt_io = NULL;
 static char *opt_title = NULL;
@@ -481,6 +495,11 @@ static int oldbutton = 3; /* button event on startup: 3 = release */
 static char *usedfont = NULL;
 static double usedfontsize = 0;
 
+static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
+static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+static long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
+static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
+
 /* Font Ring Cache */
 enum {
 	FRC_NORMAL,
@@ -499,7 +518,7 @@ static Fontcache frc[16];
 static int frclen = 0;
 
 ssize_t
-xwrite(int fd, char *s, size_t len) {
+xwrite(int fd, const char *s, size_t len) {
 	size_t aux = len;
 
 	while(len > 0) {
@@ -532,136 +551,75 @@ xrealloc(void *p, size_t len) {
 
 char *
 xstrdup(char *s) {
-	char *p = strdup(s);
-
-	if (!p)
+	if((s = strdup(s)) == NULL)
 		die("Out of memory\n");
 
-	return p;
+	return s;
 }
 
-int
-utf8decode(char *s, long *u) {
-	uchar c;
-	int i, n, rtn;
-
-	rtn = 1;
-	c = *s;
-	if(~c & 0x80) { /* 0xxxxxxx */
-		*u = c;
-		return rtn;
-	} else if((c & 0xE0) == 0xC0) { /* 110xxxxx */
-		*u = c & 0x1F;
-		n = 1;
-	} else if((c & 0xF0) == 0xE0) { /* 1110xxxx */
-		*u = c & 0x0F;
-		n = 2;
-	} else if((c & 0xF8) == 0xF0) { /* 11110xxx */
-		*u = c & 0x07;
-		n = 3;
-	} else {
-		goto invalid;
-	}
+size_t
+utf8decode(char *c, long *u, size_t clen) {
+	size_t i, j, len, type;
+	long udecoded;
 
-	for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
-		c = *s;
-		if((c & 0xC0) != 0x80) /* 10xxxxxx */
-			goto invalid;
-		*u <<= 6;
-		*u |= c & 0x3F;
-	}
-
-	if((n == 1 && *u < 0x80) ||
-	   (n == 2 && *u < 0x800) ||
-	   (n == 3 && *u < 0x10000) ||
-	   (*u >= 0xD800 && *u <= 0xDFFF)) {
-		goto invalid;
-	}
-
-	return rtn;
-invalid:
-	*u = 0xFFFD;
-
-	return rtn;
-}
-
-int
-utf8encode(long *u, char *s) {
-	uchar *sp;
-	ulong uc;
-	int i, n;
-
-	sp = (uchar *)s;
-	uc = *u;
-	if(uc < 0x80) {
-		*sp = uc; /* 0xxxxxxx */
+	*u = UTF_INVALID;
+	if(!clen)
+		return 0;
+	udecoded = utf8decodebyte(c[0], &len);
+	if(!BETWEEN(len, 1, UTF_SIZ))
 		return 1;
-	} else if(*u < 0x800) {
-		*sp = (uc >> 6) | 0xC0; /* 110xxxxx */
-		n = 1;
-	} else if(uc < 0x10000) {
-		*sp = (uc >> 12) | 0xE0; /* 1110xxxx */
-		n = 2;
-	} else if(uc <= 0x10FFFF) {
-		*sp = (uc >> 18) | 0xF0; /* 11110xxx */
-		n = 3;
-	} else {
-		goto invalid;
+	for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
+		udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
+		if(type != 0)
+			return j;
 	}
+	if(j < len)
+		return 0;
+	*u = udecoded;
+	utf8validate(u, len);
+	return len;
+}
 
-	for(i=n,++sp; i>0; --i,++sp)
-		*sp = ((uc >> 6*(i-1)) & 0x3F) | 0x80; /* 10xxxxxx */
-
-	return n+1;
-invalid:
-	/* U+FFFD */
-	*s++ = '\xEF';
-	*s++ = '\xBF';
-	*s = '\xBD';
-
-	return 3;
+long
+utf8decodebyte(char c, size_t *i) {
+	for(*i = 0; *i < LEN(utfmask); ++(*i))
+		if(((uchar)c & utfmask[*i]) == utfbyte[*i])
+			return (uchar)c & ~utfmask[*i];
+	return 0;
 }
 
-/* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
-   UTF-8 otherwise return 0 */
-int
-isfullutf8(char *s, int b) {
-	uchar *c1, *c2, *c3;
+size_t
+utf8encode(long u, char *c, size_t clen) {
+	size_t len, i;
 
-	c1 = (uchar *)s;
-	c2 = (uchar *)++s;
-	c3 = (uchar *)++s;
-	if(b < 1) {
-		return 0;
-	} else if((*c1 & 0xE0) == 0xC0 && b == 1) {
+	len = utf8validate(&u, 0);
+	if(clen < len)
 		return 0;
-	} else if((*c1 & 0xF0) == 0xE0 &&
-	    ((b == 1) ||
-	    ((b == 2) && (*c2 & 0xC0) == 0x80))) {
-		return 0;
-	} else if((*c1 & 0xF8) == 0xF0 &&
-	    ((b == 1) ||
-	    ((b == 2) && (*c2 & 0xC0) == 0x80) ||
-	    ((b == 3) && (*c2 & 0xC0) == 0x80 && (*c3 & 0xC0) == 0x80))) {
-		return 0;
-	} else {
-		return 1;
+	for(i = len - 1; i != 0; --i) {
+		c[i] = utf8encodebyte(u, 0);
+		u >>= 6;
 	}
+	c[0] = utf8encodebyte(u, len);
+	return len;
 }
 
-int
-utf8size(char *s) {
-	uchar c = *s;
+char
+utf8encodebyte(long u, size_t i) {
+	return utfbyte[i] | (u & ~utfmask[i]);
+}
 
-	if(~c & 0x80) {
-		return 1;
-	} else if((c & 0xE0) == 0xC0) {
-		return 2;
-	} else if((c & 0xF0) == 0xE0) {
-		return 3;
-	} else {
-		return 4;
-	}
+size_t
+utf8len(char *c) {
+	return utf8decode(c, &(long){0}, UTF_SIZ);
+}
+
+size_t
+utf8validate(long *u, size_t i) {
+	if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
+		*u = UTF_INVALID;
+	for(i = 1; *u > utfmax[i]; ++i)
+		;
+	return i;
 }
 
 static void
@@ -949,8 +907,8 @@ bpress(XEvent *e) {
 	}
 }
 
-void
-selcopy(void) {
+char *
+getsel(void) {
 	char *str, *ptr;
 	int x, y, bufsize, size, i, ex;
 	Glyph *gp, *last;
@@ -975,7 +933,7 @@ selcopy(void) {
 				if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
 					continue;
 
-				size = utf8size(gp->c);
+				size = utf8len(gp->c);
 				memcpy(ptr, gp->c, size);
 				ptr += size;
 			}
@@ -1009,7 +967,12 @@ selcopy(void) {
 		}
 		*ptr = 0;
 	}
-	xsetsel(str);
+	return str;
+}
+
+void
+selcopy(void) {
+	xsetsel(getsel());
 }
 
 void
@@ -1029,7 +992,7 @@ selnotify(XEvent *e) {
 		}
 
 		/*
-		 * As seen in selcopy:
+		 * As seen in getsel:
 		 * Line endings are inconsistent in the terminal and GUI world
 		 * copy and pasting. When receiving some selection data,
 		 * replace all '\n' with '\r'.
@@ -1218,7 +1181,7 @@ sigchld(int a) {
 	int stat = 0;
 
 	if(waitpid(pid, &stat, 0) < 0)
-		die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
+		die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
 
 	if(WIFEXITED(stat)) {
 		exit(WEXITSTATUS(stat));
@@ -1234,7 +1197,7 @@ ttynew(void) {
 
 	/* seems to work fine on linux, openbsd and freebsd */
 	if(openpty(&m, &s, NULL, NULL, &w) < 0)
-		die("openpty failed: %s\n", SERRNO);
+		die("openpty failed: %s\n", strerror(errno));
 
 	switch(pid = fork()) {
 	case -1:
@@ -1246,7 +1209,7 @@ ttynew(void) {
 		dup2(s, STDOUT_FILENO);
 		dup2(s, STDERR_FILENO);
 		if(ioctl(s, TIOCSCTTY, NULL) < 0)
-			die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
+			die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
 		close(s);
 		close(m);
 		execsh();
@@ -1256,6 +1219,7 @@ ttynew(void) {
 		cmdfd = m;
 		signal(SIGCHLD, sigchld);
 		if(opt_io) {
+			term.mode |= MODE_PRINT;
 			iofd = (!strcmp(opt_io, "-")) ?
 				  STDOUT_FILENO :
 				  open(opt_io, O_WRONLY | O_CREAT, 0666);
@@ -1283,19 +1247,18 @@ ttyread(void) {
 	char *ptr;
 	char s[UTF_SIZ];
 	int charsize; /* size of utf8 char in bytes */
-	long utf8c;
+	long unicodep;
 	int ret;
 
 	/* append read bytes to unprocessed bytes */
 	if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
-		die("Couldn't read from shell: %s\n", SERRNO);
+		die("Couldn't read from shell: %s\n", strerror(errno));
 
 	/* process every complete utf8 char */
 	buflen += ret;
 	ptr = buf;
-	while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
-		charsize = utf8decode(ptr, &utf8c);
-		utf8encode(&utf8c, s);
+	while((charsize = utf8decode(ptr, &unicodep, buflen))) {
+		utf8encode(unicodep, s, UTF_SIZ);
 		tputc(s, charsize);
 		ptr += charsize;
 		buflen -= charsize;
@@ -1307,8 +1270,8 @@ ttyread(void) {
 
 void
 ttywrite(const char *s, size_t n) {
-	if(write(cmdfd, s, n) == -1)
-		die("write error on tty: %s\n", SERRNO);
+	if(xwrite(cmdfd, s, n) == -1)
+		die("write error on tty: %s\n", strerror(errno));
 }
 
 void
@@ -1327,7 +1290,7 @@ ttyresize(void) {
 	w.ws_xpixel = xw.tw;
 	w.ws_ypixel = xw.th;
 	if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
-		fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
+		fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
 }
 
 int
@@ -1437,15 +1400,13 @@ tscrolldown(int orig, int n) {
 
 	LIMIT(n, 0, term.bot-orig+1);
 
+	tsetdirt(orig, term.bot-n);
 	tclearregion(0, term.bot-n+1, term.col-1, term.bot);
 
 	for(i = term.bot; i >= orig+n; i--) {
 		temp = term.line[i];
 		term.line[i] = term.line[i-n];
 		term.line[i-n] = temp;
-
-		term.dirty[i] = 1;
-		term.dirty[i-n] = 1;
 	}
 
 	selscroll(orig, n);
@@ -1455,17 +1416,16 @@ void
 tscrollup(int orig, int n) {
 	int i;
 	Line temp;
+
 	LIMIT(n, 0, term.bot-orig+1);
 
 	tclearregion(0, orig, term.col-1, orig+n-1);
+	tsetdirt(orig+n, term.bot);
 
 	for(i = orig; i <= term.bot-n; i++) {
-		 temp = term.line[i];
-		 term.line[i] = term.line[i+n];
-		 term.line[i+n] = temp;
-
-		 term.dirty[i] = 1;
-		 term.dirty[i+n] = 1;
+		temp = term.line[i];
+		term.line[i] = term.line[i+n];
+		term.line[i+n] = temp;
 	}
 
 	selscroll(orig, -n);
@@ -1581,8 +1541,7 @@ tsetchar(char *c, Glyph *attr, int x, int y) {
 	 * The table is proudly stolen from rxvt.
 	 */
 	if(attr->mode & ATTR_GFX) {
-		if(c[0] >= 0x41 && c[0] <= 0x7e
-				&& vt100_0[c[0] - 0x41]) {
+		if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
 			c = vt100_0[c[0] - 0x41];
 		}
 	}
@@ -1629,54 +1588,46 @@ tclearregion(int x1, int y1, int x2, int y2) {
 
 void
 tdeletechar(int n) {
-	int src = term.c.x + n;
-	int dst = term.c.x;
-	int size = term.col - src;
+	int dst, src, size;
+	Glyph *line;
 
-	term.dirty[term.c.y] = 1;
+	LIMIT(n, 0, term.col - term.c.x);
 
-	if(src >= term.col) {
-		tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
-		return;
-	}
+	dst = term.c.x;
+	src = term.c.x + n;
+	size = term.col - src;
+	line = term.line[term.c.y];
 
-	memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
-			size * sizeof(Glyph));
+	memmove(&line[dst], &line[src], size * sizeof(Glyph));
 	tclearregion(term.col-n, 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 - dst;
+	int dst, src, size;
+	Glyph *line;
 
-	term.dirty[term.c.y] = 1;
+	LIMIT(n, 0, term.col - term.c.x);
 
-	if(dst >= term.col) {
-		tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
-		return;
-	}
+	dst = term.c.x + n;
+	src = term.c.x;
+	size = term.col - dst;
+	line = term.line[term.c.y];
 
-	memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src],
-			size * sizeof(Glyph));
+	memmove(&line[dst], &line[src], size * sizeof(Glyph));
 	tclearregion(src, term.c.y, dst - 1, term.c.y);
 }
 
 void
 tinsertblankline(int n) {
-	if(term.c.y < term.top || term.c.y > term.bot)
-		return;
-
-	tscrolldown(term.c.y, n);
+	if(BETWEEN(term.c.y, term.top, term.bot))
+		tscrolldown(term.c.y, n);
 }
 
 void
 tdeleteline(int n) {
-	if(term.c.y < term.top || term.c.y > term.bot)
-		return;
-
-	tscrollup(term.c.y, n);
+	if(BETWEEN(term.c.y, term.top, term.bot))
+		tscrollup(term.c.y, n);
 }
 
 int32_t
@@ -1822,8 +1773,6 @@ tsetscroll(int t, int b) {
 	term.bot = b;
 }
 
-#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
-
 void
 tsetmode(bool priv, bool set, int *args, int narg) {
 	int *lim, mode;
@@ -1832,7 +1781,6 @@ tsetmode(bool priv, bool set, int *args, int narg) {
 	for(lim = args + narg; args < lim; ++args) {
 		if(priv) {
 			switch(*args) {
-				break;
 			case 1: /* DECCKM -- Cursor key */
 				MODBIT(term.mode, set, MODE_APPCURSOR);
 				break;
@@ -1892,7 +1840,10 @@ tsetmode(bool priv, bool set, int *args, int narg) {
 				MODBIT(term.mode, set, MODE_8BIT);
 				break;
 			case 1049: /* swap screen & set/restore cursor as xterm */
+				if (!allowaltscreen)
+					break;
 				tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
+				/* FALLTHRU */
 			case 47: /* swap screen */
 			case 1047:
 				if (!allowaltscreen)
@@ -1979,6 +1930,25 @@ csihandle(void) {
 		DEFAULT(csiescseq.arg[0], 1);
 		tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
 		break;
+	case 'i': /* MC -- Media Copy */
+		switch(csiescseq.arg[0]) {
+		case 0:
+			tdump();
+			break;
+		case 1:
+			tdumpline(term.c.y);
+			break;
+		case 2:
+			tdumpsel();
+			break;
+		case 4:
+			term.mode &= ~MODE_PRINT;
+			break;
+		case 5:
+			term.mode |= MODE_PRINT;
+			break;
+		}
+		break;
 	case 'c': /* DA -- Device Attributes */
 		if(csiescseq.arg[0] == 0)
 			ttywrite(VT102ID, sizeof(VT102ID) - 1);
@@ -2025,8 +1995,7 @@ csihandle(void) {
 		break;
 	case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
 		DEFAULT(csiescseq.arg[0], 1);
-		while(csiescseq.arg[0]--)
-			tputtab(1);
+		tputtab(csiescseq.arg[0]);
 		break;
 	case 'J': /* ED -- Clear screen */
 		selclear(NULL);
@@ -2094,8 +2063,7 @@ csihandle(void) {
 		break;
 	case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
 		DEFAULT(csiescseq.arg[0], 1);
-		while(csiescseq.arg[0]--)
-			tputtab(0);
+		tputtab(-csiescseq.arg[0]);
 		break;
 	case 'd': /* VPA -- Move to <row> */
 		DEFAULT(csiescseq.arg[0], 1);
@@ -2252,19 +2220,75 @@ strreset(void) {
 }
 
 void
-tputtab(bool forward) {
+tprinter(char *s, size_t len) {
+	if(iofd != -1 && xwrite(iofd, s, len) < 0) {
+		fprintf(stderr, "Error writing in %s:%s\n",
+			opt_io, strerror(errno));
+		close(iofd);
+		iofd = -1;
+	}
+}
+
+void
+toggleprinter(const Arg *arg) {
+	term.mode ^= MODE_PRINT;
+}
+
+void
+printscreen(const Arg *arg) {
+	tdump();
+}
+
+void
+printsel(const Arg *arg) {
+	tdumpsel();
+}
+
+void
+tdumpsel(void) {
+	char *ptr;
+
+	if((ptr = getsel())) {
+		tprinter(ptr, strlen(ptr));
+		free(ptr);
+	}
+}
+
+void
+tdumpline(int n) {
+	Glyph *bp, *end;
+
+	bp = &term.line[n][0];
+	end = &bp[term.col-1];
+	while(end > bp && !strcmp(" ", end->c))
+		--end;
+	if(bp != end || strcmp(bp->c, " ")) {
+		for( ;bp <= end; ++bp)
+			tprinter(bp->c, strlen(bp->c));
+	}
+	tprinter("\n", 1);
+}
+
+void
+tdump(void) {
+	int i;
+
+	for(i = 0; i < term.row; ++i)
+		tdumpline(i);
+}
+
+void
+tputtab(int n) {
 	uint x = term.c.x;
 
-	if(forward) {
-		if(x == term.col)
-			return;
-		for(++x; x < term.col && !term.tabs[x]; ++x)
-			/* nothing */ ;
-	} else {
-		if(x == 0)
-			return;
-		for(--x; x > 0 && !term.tabs[x]; --x)
-			/* nothing */ ;
+	if(n > 0) {
+		while(x < term.col && n--)
+			for(++x; x < term.col && !term.tabs[x]; ++x)
+				/* nothing */ ;
+	} else if(n < 0) {
+		while(x > 0 && n++)
+			for(--x; x > 0 && !term.tabs[x]; --x)
+				/* nothing */ ;
 	}
 	tmoveto(x, term.c.y);
 }
@@ -2274,12 +2298,9 @@ techo(char *buf, int len) {
 	for(; len > 0; buf++, len--) {
 		char c = *buf;
 
-		if(c == '\033') { /* escape */
-			tputc("^", 1);
-			tputc("[", 1);
-		} else if(c < '\x20') { /* control code */
+		if(c < 0x20 || c == 0177) { /* control code */
 			if(c != '\n' && c != '\r' && c != '\t') {
-				c |= '\x40';
+				c ^= '\x40';
 				tputc("^", 1);
 			}
 			tputc(&c, 1);
@@ -2312,34 +2333,27 @@ tdeftran(char ascii) {
 
 void
 tselcs(void) {
-	if (term.trantbl[term.charset] == CS_GRAPHIC0)
-		term.c.attr.mode |= ATTR_GFX;
-	else
-		term.c.attr.mode &= ~ATTR_GFX;
+	MODBIT(term.c.attr.mode,
+	       term.trantbl[term.charset] == CS_GRAPHIC0,
+	       ATTR_GFX);
 }
 
 void
 tputc(char *c, int len) {
 	uchar ascii = *c;
 	bool control = ascii < '\x20' || ascii == 0177;
-	long u8char;
+	long unicodep;
 	int width;
 
 	if(len == 1) {
 		width = 1;
 	} else {
-		utf8decode(c, &u8char);
-		width = wcwidth(u8char);
+		utf8decode(c, &unicodep, UTF_SIZ);
+		width = wcwidth(unicodep);
 	}
 
-	if(iofd != -1) {
-		if(xwrite(iofd, c, len) < 0) {
-			fprintf(stderr, "Error writing in %s:%s\n",
-				opt_io, strerror(errno));
-			close(iofd);
-			iofd = -1;
-		}
-	}
+	if(IS_SET(MODE_PRINT))
+		tprinter(c, len);
 
 	/*
 	 * STR sequences must be checked before anything else
@@ -2659,7 +2673,9 @@ tresize(int col, int row) {
 		if(0 < col && minrow < row) {
 			tclearregion(0, minrow, col - 1, row - 1);
 		}
+		tcursor(CURSOR_SAVE);
 		tswapscreen();
+		tcursor(CURSOR_LOAD);
 	} while(orig != term.line);
 
 	return (slide > 0);
@@ -2732,10 +2748,10 @@ int
 xsetcolorname(int x, const char *name) {
 	XRenderColor color = { .alpha = 0xffff };
 	Colour colour;
-	if (x < 0 || x > LEN(colorname))
+	if(!BETWEEN(x, 0, LEN(colorname)))
 		return -1;
 	if(!name) {
-		if(16 <= x && x < 16 + 216) {
+		if(BETWEEN(x, 16, 16 + 215)) {
 			int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
 			color.red = sixd_to_16bit(r);
 			color.green = sixd_to_16bit(g);
@@ -2744,7 +2760,7 @@ xsetcolorname(int x, const char *name) {
 				return 0; /* something went wrong */
 			dc.col[x] = colour;
 			return 1;
-		} else if (16 + 216 <= x && x < 256) {
+		} else if(BETWEEN(x, 16 + 216, 255)) {
 			color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
 			if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
 				return 0; /* something went wrong */
@@ -2787,24 +2803,44 @@ xhints(void) {
 	XSizeHints *sizeh = NULL;
 
 	sizeh = XAllocSizeHints();
-	if(xw.isfixed == False) {
-		sizeh->flags = PSize | PResizeInc | PBaseSize;
-		sizeh->height = xw.h;
-		sizeh->width = xw.w;
-		sizeh->height_inc = xw.ch;
-		sizeh->width_inc = xw.cw;
-		sizeh->base_height = 2 * borderpx;
-		sizeh->base_width = 2 * borderpx;
-	} else {
-		sizeh->flags = PMaxSize | PMinSize;
-		sizeh->min_width = sizeh->max_width = xw.fw;
-		sizeh->min_height = sizeh->max_height = xw.fh;
-	}
 
-	XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
+	sizeh->flags = PSize | PResizeInc | PBaseSize;
+	sizeh->height = xw.h;
+	sizeh->width = xw.w;
+	sizeh->height_inc = xw.ch;
+	sizeh->width_inc = xw.cw;
+	sizeh->base_height = 2 * borderpx;
+	sizeh->base_width = 2 * borderpx;
+	if(xw.isfixed == True) {
+		sizeh->flags |= PMaxSize | PMinSize;
+		sizeh->min_width = sizeh->max_width = xw.w;
+		sizeh->min_height = sizeh->max_height = xw.h;
+	}
+	if(xw.gm & (XValue|YValue)) {
+		sizeh->flags |= USPosition | PWinGravity;
+		sizeh->x = xw.l;
+		sizeh->y = xw.t;
+		sizeh->win_gravity = xgeommasktogravity(xw.gm);
+	}
+
+	XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
+			&class);
 	XFree(sizeh);
 }
 
+int
+xgeommasktogravity(int mask) {
+	switch(mask & (XNegative|YNegative)) {
+	case 0:
+		return NorthWestGravity;
+	case XNegative:
+		return NorthEastGravity;
+	case YNegative:
+		return SouthWestGravity;
+	}
+	return SouthEastGravity;
+}
+
 int
 xloadfont(Font *f, FcPattern *pattern) {
 	FcPattern *match;
@@ -2950,7 +2986,6 @@ xinit(void) {
 	XGCValues gcvalues;
 	Cursor cursor;
 	Window parent;
-	int sw, sh;
 	pid_t thispid = getpid();
 
 	if(!(xw.dpy = XOpenDisplay(NULL)))
@@ -2970,23 +3005,12 @@ xinit(void) {
 	xloadcols();
 
 	/* adjust fixed window geometry */
-	if(xw.isfixed) {
-		sw = DisplayWidth(xw.dpy, xw.scr);
-		sh = DisplayHeight(xw.dpy, xw.scr);
-		if(xw.fx < 0)
-			xw.fx = sw + xw.fx - xw.fw - 1;
-		if(xw.fy < 0)
-			xw.fy = sh + xw.fy - xw.fh - 1;
-
-		xw.h = xw.fh;
-		xw.w = xw.fw;
-	} else {
-		/* window - default size */
-		xw.h = 2 * borderpx + term.row * xw.ch;
-		xw.w = 2 * borderpx + term.col * xw.cw;
-		xw.fx = 0;
-		xw.fy = 0;
-	}
+	xw.w = 2 * borderpx + term.col * xw.cw;
+	xw.h = 2 * borderpx + term.row * xw.ch;
+	if(xw.gm & XNegative)
+		xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
+	if(xw.gm & YNegative)
+		xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
 
 	/* Events */
 	xw.attrs.background_pixel = dc.col[defaultbg].pixel;
@@ -2999,7 +3023,7 @@ xinit(void) {
 
 	parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
 			XRootWindow(xw.dpy, xw.scr);
-	xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
+	xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
 			xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
 			xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
 			| CWEventMask | CWColormap, &xw.attrs);
@@ -3048,12 +3072,12 @@ xinit(void) {
 
 	xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
 	XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
-			PropModeReplace, (unsigned char *)&thispid, 1);
+			PropModeReplace, (uchar *)&thispid, 1);
 
 	xresettitle();
 	XMapWindow(xw.dpy, xw.win);
 	xhints();
-	XSync(xw.dpy, 0);
+	XSync(xw.dpy, False);
 }
 
 void
@@ -3063,7 +3087,7 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 	int frcflags;
 	int u8fl, u8fblen, u8cblen, doesexist;
 	char *u8c, *u8fs;
-	long u8char;
+	long unicodep;
 	Font *font = &dc.font;
 	FcResult fcres;
 	FcPattern *fcpattern, *fontpattern;
@@ -3071,7 +3095,7 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 	FcCharSet *fccharset;
 	Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
 	XRenderColor colfg, colbg;
-	Rectangle r;
+	XRectangle r;
 	int oneatatime;
 
 	frcflags = FRC_NORMAL;
@@ -3090,6 +3114,7 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 		if(base.fg == defaultfg)
 			base.fg = defaultunderline;
 	}
+
 	if(IS_TRUECOL(base.fg)) {
 		colfg.alpha = 0xffff;
 		colfg.red = TRUERED(base.fg);
@@ -3112,8 +3137,6 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 		bg = &dc.col[base.bg];
 	}
 
-
-
 	if(base.mode & ATTR_BOLD) {
 		if(BETWEEN(base.fg, 0, 7)) {
 			/* basic system colors */
@@ -3143,7 +3166,8 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 			colfg.green = ~fg->color.green;
 			colfg.blue = ~fg->color.blue;
 			colfg.alpha = fg->color.alpha;
-			XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
+			XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
+					&revfg);
 			fg = &revfg;
 		}
 
@@ -3154,7 +3178,8 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 			colbg.green = ~bg->color.green;
 			colbg.blue = ~bg->color.blue;
 			colbg.alpha = bg->color.alpha;
-			XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
+			XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
+					&revbg);
 			bg = &revbg;
 		}
 	}
@@ -3205,11 +3230,11 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 		oneatatime = font->width != xw.cw;
 		for(;;) {
 			u8c = s;
-			u8cblen = utf8decode(s, &u8char);
+			u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
 			s += u8cblen;
 			bytelen -= u8cblen;
 
-			doesexist = XftCharExists(xw.dpy, font->match, u8char);
+			doesexist = XftCharExists(xw.dpy, font->match, unicodep);
 			if(oneatatime || !doesexist || bytelen <= 0) {
 				if(oneatatime || bytelen <= 0) {
 					if(doesexist) {
@@ -3234,14 +3259,14 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 			u8fblen += u8cblen;
 		}
 		if(doesexist) {
-			if (oneatatime)
+			if(oneatatime)
 				continue;
 			break;
 		}
 
 		/* Search the font cache. */
 		for(i = 0; i < frclen; i++) {
-			if(XftCharExists(xw.dpy, frc[i].font, u8char)
+			if(XftCharExists(xw.dpy, frc[i].font, unicodep)
 					&& frc[i].flags == frcflags) {
 				break;
 			}
@@ -3257,11 +3282,13 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 			 * Nothing was found in the cache. Now use
 			 * some dozen of Fontconfig calls to get the
 			 * font for one single character.
+			 *
+			 * Xft and fontconfig are design failures.
 			 */
 			fcpattern = FcPatternDuplicate(font->pattern);
 			fccharset = FcCharSetCreate();
 
-			FcCharSetAddChar(fccharset, u8char);
+			FcCharSetAddChar(fccharset, unicodep);
 			FcPatternAddCharSet(fcpattern, FC_CHARSET,
 					fccharset);
 			FcPatternAddBool(fcpattern, FC_SCALABLE,
@@ -3297,9 +3324,15 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 				xp, winy + frc[i].font->ascent,
 				(FcChar8 *)u8c, u8cblen);
 
-		xp += xw.cw * wcwidth(u8char);
+		xp += xw.cw * wcwidth(unicodep);
 	}
 
+	/*
+	 * This is how the loop above actually should be. Why does the
+	 * application have to care about font details?
+	 *
+	 * I have to repeat: Xft and Fontconfig are design failures.
+	 */
 	/*
 	XftDrawStringUtf8(xw.draw, fg, font->set, winx,
 			winy + font->ascent, (FcChar8 *)s, bytelen);
@@ -3334,7 +3367,7 @@ xdrawcursor(void) {
 	memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
 
 	/* remove the old cursor */
-	sl = utf8size(term.line[oldy][oldx].c);
+	sl = utf8len(term.line[oldy][oldx].c);
 	width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
 	xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
 			oldy, width, sl);
@@ -3348,7 +3381,7 @@ xdrawcursor(void) {
 				g.bg = defaultfg;
 			}
 
-			sl = utf8size(g.c);
+			sl = utf8len(g.c);
 			width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
 				? 2 : 1;
 			xdraws(g.c, g, term.c.x, term.c.y, width, sl);
@@ -3395,7 +3428,6 @@ void
 redraw(int timeout) {
 	struct timespec tv = {0, timeout * 1000};
 
-	tfulldirt();
 	draw();
 
 	if(timeout > 0) {
@@ -3420,9 +3452,9 @@ drawregion(int x1, int y1, int x2, int y2) {
 	Glyph base, new;
 	char buf[DRAW_BUF_SIZ];
 	bool ena_sel = sel.ob.x != -1;
-	long u8char;
+	long unicodep;
 
-	if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
+	if(sel.alt != IS_SET(MODE_ALTSCREEN))
 		ena_sel = 0;
 
 	if(!(xw.state & WIN_VISIBLE))
@@ -3452,7 +3484,7 @@ drawregion(int x1, int y1, int x2, int y2) {
 				base = new;
 			}
 
-			sl = utf8decode(new.c, &u8char);
+			sl = utf8decode(new.c, &unicodep, UTF_SIZ);
 			memcpy(buf+ib, new.c, sl);
 			ib += sl;
 			ic += (new.mode & ATTR_WIDE)? 2 : 1;
@@ -3611,7 +3643,7 @@ kpress(XEvent *ev) {
 		if(IS_SET(MODE_8BIT)) {
 			if(*buf < 0177) {
 				c = *buf | 0x80;
-				len = utf8encode(&c, buf);
+				len = utf8encode(c, buf, UTF_SIZ);
 			}
 		} else {
 			buf[1] = buf[0];
@@ -3688,13 +3720,10 @@ run(void) {
 	}
 
 	ttynew();
-	if(!xw.isfixed)
-		cresize(w, h);
-	else
-		cresize(xw.fw, xw.fh);
+	cresize(w, h);
 
-	gettimeofday(&lastblink, NULL);
 	gettimeofday(&last, NULL);
+	lastblink = last;
 
 	for(xev = actionfps;;) {
 		long deltatime;
@@ -3706,7 +3735,7 @@ run(void) {
 		if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
 			if(errno == EINTR)
 				continue;
-			die("select failed: %s\n", SERRNO);
+			die("select failed: %s\n", strerror(errno));
 		}
 		if(FD_ISSET(cmdfd, &rfd)) {
 			ttyread();
@@ -3729,7 +3758,7 @@ run(void) {
 		if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
 			tsetdirtattr(ATTR_BLINK);
 			term.mode ^= MODE_BLINK;
-			gettimeofday(&lastblink, NULL);
+			lastblink = now;
 			dodraw = 1;
 		}
 		deltatime = TIMEDIFF(now, last);
@@ -3774,18 +3803,17 @@ run(void) {
 
 void
 usage(void) {
-	die("%s " VERSION " (c) 2010-2013 st engineers\n" \
+	die("%s " VERSION " (c) 2010-2014 st engineers\n" \
 	"usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
 	" [-t title] [-w windowid] [-e command ...]\n", argv0);
 }
 
 int
 main(int argc, char *argv[]) {
-	int bitm, xr, yr;
-	uint wr, hr;
 	char *titles;
+	uint cols = 80, rows = 24;
 
-	xw.fw = xw.fh = xw.fx = xw.fy = 0;
+	xw.l = xw.t = 0;
 	xw.isfixed = False;
 
 	ARGBEGIN {
@@ -3809,22 +3837,11 @@ main(int argc, char *argv[]) {
 		opt_font = EARGF(usage());
 		break;
 	case 'g':
-		bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
-		if(bitm & XValue)
-			xw.fx = xr;
-		if(bitm & YValue)
-			xw.fy = yr;
-		if(bitm & WidthValue)
-			xw.fw = (int)wr;
-		if(bitm & HeightValue)
-			xw.fh = (int)hr;
-		if(bitm & XNegative && xw.fx == 0)
-			xw.fx = -1;
-		if(bitm & YNegative && xw.fy == 0)
-			xw.fy = -1;
-
-		if(xw.fh != 0 && xw.fw != 0)
-			xw.isfixed = True;
+		xw.gm = XParseGeometry(EARGF(usage()),
+				&xw.l, &xw.t, &cols, &rows);
+		break;
+	case 'i':
+		xw.isfixed = True;
 		break;
 	case 'o':
 		opt_io = EARGF(usage());
@@ -3843,7 +3860,7 @@ main(int argc, char *argv[]) {
 run:
 	setlocale(LC_CTYPE, "");
 	XSetLocaleModifiers("");
-	tnew(80, 24);
+	tnew(cols? cols : 1, rows? rows : 1);
 	xinit();
 	selinit();
 	run();