X-Git-Url: https://git.xinqibao.xyz/st.git/blobdiff_plain/df54ab040509829b4baec1673e4b158038ff983d..462a966ee2c0f49f432bedaf8e6ebdff995262a9:/st.c?ds=sidebyside

diff --git a/st.c b/st.c
index f56667b..655d5a3 100644
--- a/st.c
+++ b/st.c
@@ -6,6 +6,7 @@
 #include <limits.h>
 #include <locale.h>
 #include <stdarg.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -23,6 +24,7 @@
 #include <X11/Xutil.h>
 #include <X11/cursorfont.h>
 #include <X11/keysym.h>
+#include <X11/extensions/Xdbe.h>
 
 #if   defined(__linux)
  #include <pty.h>
@@ -33,17 +35,19 @@
 #endif
 
 #define USAGE \
-	"st " VERSION " (c) 2010-2011 st engineers\n" \
-	"usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
+	"st " VERSION " (c) 2010-2012 st engineers\n" \
+	"usage: st [-t title] [-c class] [-g geometry]" \
+	" [-w windowid] [-v] [-f file] [-e command...]\n"
 
 /* XEMBED messages */
 #define XEMBED_FOCUS_IN  4
 #define XEMBED_FOCUS_OUT 5
 
 /* Arbitrary sizes */
-#define ESC_TITLE_SIZ 256
 #define ESC_BUF_SIZ   256
 #define ESC_ARG_SIZ   16
+#define STR_BUF_SIZ   256
+#define STR_ARG_SIZ   16
 #define DRAW_BUF_SIZ  1024
 #define UTF_SIZ       4
 #define XK_NO_MOD     UINT_MAX
@@ -51,6 +55,7 @@
 
 #define SELECT_TIMEOUT (20*1000) /* 20 ms */
 #define DRAW_TIMEOUT  (20*1000) /* 20 ms */
+#define REDRAW_TIMEOUT (80*1000) /* 80 ms */
 
 #define SERRNO strerror(errno)
 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
@@ -65,26 +70,76 @@
 #define X2COL(x) (((x) - BORDER)/xw.cw)
 #define Y2ROW(y) (((y) - BORDER)/xw.ch)
 
-/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
-enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
-enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
-       CURSOR_SAVE, CURSOR_LOAD };
-enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
-enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
-enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8,
-       MODE_CRLF=16, MODE_MOUSEBTN=32, MODE_MOUSEMOTION=64, MODE_MOUSE=32|64, MODE_REVERSE=128 };
-enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
-enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
+enum glyph_attribute {
+	ATTR_NULL      = 0,
+	ATTR_REVERSE   = 1,
+	ATTR_UNDERLINE = 2,
+	ATTR_BOLD      = 4,
+	ATTR_GFX       = 8,
+	ATTR_ITALIC    = 16,
+};
+
+enum cursor_movement {
+	CURSOR_UP,
+	CURSOR_DOWN,
+	CURSOR_LEFT,
+	CURSOR_RIGHT,
+	CURSOR_SAVE,
+	CURSOR_LOAD
+};
+
+enum cursor_state {
+	CURSOR_DEFAULT  = 0,
+	CURSOR_HIDE     = 1,
+	CURSOR_WRAPNEXT = 2
+};
+
+enum glyph_state {
+	GLYPH_SET   = 1,
+	GLYPH_DIRTY = 2
+};
+
+enum term_mode {
+	MODE_WRAP	= 1,
+	MODE_INSERT      = 2,
+	MODE_APPKEYPAD   = 4,
+	MODE_ALTSCREEN   = 8,
+	MODE_CRLF	= 16,
+	MODE_MOUSEBTN    = 32,
+	MODE_MOUSEMOTION = 64,
+	MODE_MOUSE       = 32|64,
+	MODE_REVERSE     = 128
+};
 
+enum escape_state {
+	ESC_START      = 1,
+	ESC_CSI	= 2,
+	ESC_STR	= 4, /* DSC, OSC, PM, APC */
+	ESC_ALTCHARSET = 8,
+	ESC_STR_END    = 16, /* a final string was encountered */
+};
+
+enum window_state {
+	WIN_VISIBLE = 1,
+	WIN_REDRAW  = 2,
+	WIN_FOCUSED = 4
+};
+
+/* bit macro */
 #undef B0
 enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
 
+typedef unsigned char uchar;
+typedef unsigned int uint;
+typedef unsigned long ulong;
+typedef unsigned short ushort;
+
 typedef struct {
 	char c[UTF_SIZ];     /* character code */
-	char mode;  /* attribute flags */
-	int fg;     /* foreground      */
-	int bg;     /* background      */
-	char state; /* state flags     */
+	uchar mode;  /* attribute flags */
+	ushort fg;   /* foreground  */
+	ushort bg;   /* background  */
+	uchar state; /* state flags    */
 } Glyph;
 
 typedef Glyph* Line;
@@ -100,27 +155,36 @@ typedef struct {
 /* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
 typedef struct {
 	char buf[ESC_BUF_SIZ]; /* raw string */
-	int len;               /* raw string length */
+	int len;	       /* raw string length */
 	char priv;
 	int arg[ESC_ARG_SIZ];
-	int narg;              /* nb of args */
+	int narg;	      /* nb of args */
 	char mode;
 } CSIEscape;
 
+/* STR Escape sequence structs */
+/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
+typedef struct {
+	char type;	     /* ESC type ... */
+	char buf[STR_BUF_SIZ]; /* raw string */
+	int len;	       /* raw string length */
+	char *args[STR_ARG_SIZ];
+	int narg;	      /* nb of args */
+} STREscape;
+
 /* Internal representation of the screen */
 typedef struct {
 	int row;	/* nb row */
 	int col;	/* nb col */
 	Line* line;	/* screen */
 	Line* alt;	/* alternate screen */
-	char* dirty; /* dirtyness of lines */
+	bool* dirty;	/* dirtyness of lines */
 	TCursor c;	/* cursor */
 	int top;	/* top    scroll limit */
 	int bot;	/* bottom scroll limit */
 	int mode;	/* terminal mode flags */
 	int esc;	/* escape state flags */
-	char title[ESC_TITLE_SIZ];
-	int titlelen;
+	bool *tabs;
 } Term;
 
 /* Purely graphic info */
@@ -128,15 +192,15 @@ typedef struct {
 	Display* dpy;
 	Colormap cmap;
 	Window win;
-	Pixmap buf;
+	XdbeBackBuffer buf;
 	Atom xembed;
 	XIM xim;
 	XIC xic;
 	int scr;
+	Bool isfixed; /* is fixed geometry? */
+	int fx, fy, fw, fh; /* fixed geometry */
 	int w;	/* window width */
 	int h;	/* window height */
-	int bufw; /* pixmap width  */
-	int bufh; /* pixmap height */
 	int ch; /* char height */
 	int cw; /* char width  */
 	char state; /* focus, redraw, visible */
@@ -145,22 +209,10 @@ typedef struct {
 
 typedef struct {
 	KeySym k;
-	unsigned int mask;
+	uint mask;
 	char s[ESC_BUF_SIZ];
 } Key;
 
-/* Drawing Context */
-typedef struct {
-	unsigned long col[256];
-	GC gc;
-	struct {
-		int ascent;
-		int descent;
-		short lbearing;
-		short rbearing;
-		XFontSet set;
-	} font, bfont;
-} DC;
 
 /* TODO: use better name for vars... */
 typedef struct {
@@ -170,24 +222,43 @@ typedef struct {
 	struct {int x, y;} b, e;
 	char *clip;
 	Atom xtarget;
+	bool alt;
 	struct timeval tclick1;
 	struct timeval tclick2;
 } Selection;
 
 #include "config.h"
 
+/* Drawing Context */
+typedef struct {
+	ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
+	GC gc;
+	struct {
+		int ascent;
+		int descent;
+		short lbearing;
+		short rbearing;
+		XFontSet set;
+	} font, bfont, ifont;
+} DC;
+
 static void die(const char*, ...);
 static void draw(void);
+static void redraw(void);
 static void drawregion(int, int, int, int);
 static void execsh(void);
 static void sigchld(int);
 static void run(void);
-static int last_draw_too_old(void);
+static bool last_draw_too_old(void);
 
 static void csidump(void);
 static void csihandle(void);
 static void csiparse(void);
 static void csireset(void);
+static void strdump(void);
+static void strhandle(void);
+static void strparse(void);
+static void strreset(void);
 
 static void tclearregion(int, int, int, int);
 static void tcursor(int);
@@ -198,7 +269,7 @@ static void tinsertblankline(int);
 static void tmoveto(int, int);
 static void tnew(int, int);
 static void tnewline(int);
-static void tputtab(void);
+static void tputtab(bool);
 static void tputc(char*);
 static void treset(void);
 static int tresize(int, int);
@@ -208,6 +279,8 @@ static void tsetattr(int*, int);
 static void tsetchar(char*);
 static void tsetscroll(int, int);
 static void tswapscreen(void);
+static void tsetdirt(int, int);
+static void tsetmode(bool, bool, int *, int);
 static void tfulldirt(void);
 
 static void ttynew(void);
@@ -218,7 +291,7 @@ static void ttywrite(const char *, size_t);
 static void xdraws(char *, Glyph, int, int, int, int);
 static void xhints(void);
 static void xclear(int, int, int, int);
-static void xcopy(int, int, int, int);
+static void xcopy();
 static void xdrawcursor(void);
 static void xinit(void);
 static void xloadcols(void);
@@ -229,7 +302,7 @@ static void xresize(int, int);
 static void expose(XEvent *);
 static void visibility(XEvent *);
 static void unmap(XEvent *);
-static char* kmap(KeySym, unsigned int);
+static char* kmap(KeySym, uint);
 static void kpress(XEvent *);
 static void cmessage(XEvent *);
 static void resize(XEvent *);
@@ -241,7 +314,7 @@ static void selnotify(XEvent *);
 static void selrequest(XEvent *);
 
 static void selinit(void);
-static inline int selected(int, int);
+static inline bool selected(int, int);
 static void selcopy(void);
 static void selpaste();
 static void selscroll(int, int);
@@ -271,42 +344,45 @@ static void (*handler[LASTEvent])(XEvent *) = {
 static DC dc;
 static XWindow xw;
 static Term term;
-static CSIEscape escseq;
+static CSIEscape csiescseq;
+static STREscape strescseq;
 static int cmdfd;
 static pid_t pid;
 static Selection sel;
+static FILE *fileio;
 static char **opt_cmd  = NULL;
+static char *opt_io    = NULL;
 static char *opt_title = NULL;
 static char *opt_embed = NULL;
 static char *opt_class = NULL;
 
 int
 utf8decode(char *s, long *u) {
-	unsigned char c;
+	uchar c;
 	int i, n, rtn;
 
 	rtn = 1;
 	c = *s;
-	if(~c&B7) { /* 0xxxxxxx */
+	if(~c & B7) { /* 0xxxxxxx */
 		*u = c;
 		return rtn;
-	} else if((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
+	} else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
 		*u = c&(B4|B3|B2|B1|B0);
 		n = 1;
-	} else if((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
+	} else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
 		*u = c&(B3|B2|B1|B0);
 		n = 2;
-	} else if((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
-		*u = c&(B2|B1|B0);
+	} else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
+		*u = c & (B2|B1|B0);
 		n = 3;
 	} else
 		goto invalid;
-	for(i=n,++s; i>0; --i,++rtn,++s) {
+	for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
 		c = *s;
-		if((c&(B7|B6)) != B7) /* 10xxxxxx */
+		if((c & (B7|B6)) != B7) /* 10xxxxxx */
 			goto invalid;
 		*u <<= 6;
-		*u |= c&(B5|B4|B3|B2|B1|B0);
+		*u |= c & (B5|B4|B3|B2|B1|B0);
 	}
 	if((n == 1 && *u < 0x80) ||
 	   (n == 2 && *u < 0x800) ||
@@ -321,11 +397,11 @@ invalid:
 
 int
 utf8encode(long *u, char *s) {
-	unsigned char *sp;
-	unsigned long uc;
+	uchar *sp;
+	ulong uc;
 	int i, n;
 
-	sp = (unsigned char*) s;
+	sp = (uchar*) s;
 	uc = *u;
 	if(uc < 0x80) {
 		*sp = uc; /* 0xxxxxxx */
@@ -357,11 +433,11 @@ invalid:
    UTF-8 otherwise return 0 */
 int
 isfullutf8(char *s, int b) {
-	unsigned char *c1, *c2, *c3;
+	uchar *c1, *c2, *c3;
 
-	c1 = (unsigned char *) s;
-	c2 = (unsigned char *) ++s;
-	c3 = (unsigned char *) ++s;
+	c1 = (uchar *) s;
+	c2 = (uchar *) ++s;
+	c3 = (uchar *) ++s;
 	if(b < 1)
 		return 0;
 	else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
@@ -381,7 +457,7 @@ isfullutf8(char *s, int b) {
 
 int
 utf8size(char *s) {
-	unsigned char c = *s;
+	uchar c = *s;
 
 	if(~c&B7)
 		return 1;
@@ -395,8 +471,8 @@ utf8size(char *s) {
 
 void
 selinit(void) {
-	sel.tclick1.tv_sec = 0;
-	sel.tclick1.tv_usec = 0;
+	memset(&sel.tclick1, 0, sizeof(sel.tclick1));
+	memset(&sel.tclick2, 0, sizeof(sel.tclick2));
 	sel.mode = 0;
 	sel.bx = -1;
 	sel.clip = NULL;
@@ -405,7 +481,7 @@ selinit(void) {
 		sel.xtarget = XA_STRING;
 }
 
-static inline int
+static inline bool
 selected(int x, int y) {
 	if(sel.ey == y && sel.by == y) {
 		int bx = MIN(sel.bx, sel.ex);
@@ -437,7 +513,7 @@ mousereport(XEvent *e) {
 	int state = e->xbutton.state;
 	char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
 	static int ob, ox, oy;
-	
+
 	/* from urxvt */
 	if(e->xbutton.type == MotionNotify) {
 		if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
@@ -455,11 +531,11 @@ mousereport(XEvent *e) {
 			ox = x, oy = y;
 		}
 	}
-	
+
 	buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
 		+ (state & Mod4Mask    ? 8  : 0)
 		+ (state & ControlMask ? 16 : 0);
-	
+
 	ttywrite(buf, sizeof(buf));
 }
 
@@ -469,8 +545,7 @@ bpress(XEvent *e) {
 		mousereport(e);
 	else if(e->xbutton.button == Button1) {
 		if(sel.bx != -1)
-			for(int i=sel.b.y; i<=sel.e.y; i++)
-				term.dirty[i] = 1;
+			tsetdirt(sel.b.y, sel.e.y);
 		sel.mode = 1;
 		sel.ex = sel.bx = X2COL(e->xbutton.x);
 		sel.ey = sel.by = Y2ROW(e->xbutton.y);
@@ -480,33 +555,41 @@ bpress(XEvent *e) {
 void
 selcopy(void) {
 	char *str, *ptr;
-	int x, y, sz, sl, ls = 0;
+	int x, y, bufsize, is_selected = 0;
 
 	if(sel.bx == -1)
 		str = NULL;
+
 	else {
-		sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
-		ptr = str = malloc(sz);
+		bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
+		ptr = str = malloc(bufsize);
+
+		/* append every set & selected glyph to the selection */
 		for(y = 0; y < term.row; y++) {
-			for(x = 0; x < term.col; x++)
-				if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) {
-					sl = utf8size(term.line[y][x].c);
-					memcpy(ptr, term.line[y][x].c, sl);
-					ptr += sl;
+			for(x = 0; x < term.col; x++) {
+				is_selected = selected(x, y);
+				if((term.line[y][x].state & GLYPH_SET) && is_selected) {
+					int size = utf8size(term.line[y][x].c);
+					memcpy(ptr, term.line[y][x].c, size);
+					ptr += size;
 				}
-			if(ls && y < sel.e.y)
+			}
+
+			/* \n at the end of every selected line except for the last one */
+			if(is_selected && y < sel.e.y)
 				*ptr++ = '\n';
 		}
 		*ptr = 0;
 	}
+	sel.alt = IS_SET(MODE_ALTSCREEN);
 	xsetsel(str);
 }
 
 void
 selnotify(XEvent *e) {
-	unsigned long nitems, ofs, rem;
+	ulong nitems, ofs, rem;
 	int format;
-	unsigned char *data;
+	uchar *data;
 	Atom type;
 
 	ofs = 0;
@@ -550,12 +633,12 @@ selrequest(XEvent *e) {
 		Atom string = sel.xtarget;
 		XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 				XA_ATOM, 32, PropModeReplace,
-				(unsigned char *) &string, 1);
+				(uchar *) &string, 1);
 		xev.property = xsre->property;
 	} else if(xsre->target == sel.xtarget && sel.clip != NULL) {
 		XChangeProperty(xsre->display, xsre->requestor, xsre->property,
 				xsre->target, 8, PropModeReplace,
-				(unsigned char *) sel.clip, strlen(sel.clip));
+				(uchar *) sel.clip, strlen(sel.clip));
 		xev.property = xsre->property;
 	}
 
@@ -636,8 +719,7 @@ bmotion(XEvent *e) {
 		if(oldey != sel.ey || oldex != sel.ex) {
 			int starty = MIN(oldey, sel.ey);
 			int endy = MAX(oldey, sel.ey);
-			for(int i=starty; i<=endy; i++)
-				term.dirty[i] = 1;
+			tsetdirt(starty, endy);
 			draw();
 		}
 	}
@@ -658,7 +740,11 @@ execsh(void) {
 	char **args;
 	char *envshell = getenv("SHELL");
 
-	DEFAULT(envshell, "sh");
+	unsetenv("COLUMNS");
+	unsetenv("LINES");
+	unsetenv("TERMCAP");
+
+	DEFAULT(envshell, SHELL);
 	putenv("TERM="TNAME);
 	args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
 	execvp(args[0], args);
@@ -679,7 +765,7 @@ sigchld(int a) {
 void
 ttynew(void) {
 	int m, s;
-	
+
 	/* seems to work fine on linux, openbsd and freebsd */
 	struct winsize w = {term.row, term.col, 0, 0};
 	if(openpty(&m, &s, NULL, NULL, &w) < 0)
@@ -704,6 +790,10 @@ ttynew(void) {
 		close(s);
 		cmdfd = m;
 		signal(SIGCHLD, sigchld);
+		if(opt_io && !(fileio = fopen(opt_io, "w"))) {
+			fprintf(stderr, "Error opening %s:%s\n",
+				opt_io, strerror(errno));
+		}
 	}
 }
 
@@ -756,19 +846,30 @@ ttyresize(int x, int y) {
 
 	w.ws_row = term.row;
 	w.ws_col = term.col;
-	w.ws_xpixel = w.ws_ypixel = 0;
+	w.ws_xpixel = xw.w;
+	w.ws_ypixel = xw.h;
 	if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
 		fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 }
 
 void
-tfulldirt(void)
+tsetdirt(int top, int bot)
 {
 	int i;
-	for(i = 0; i < term.row; i++)
+
+	LIMIT(top, 0, term.row-1);
+	LIMIT(bot, 0, term.row-1);
+
+	for(i = top; i <= bot; i++)
 		term.dirty[i] = 1;
 }
 
+void
+tfulldirt(void)
+{
+	tsetdirt(0, term.row-1);
+}
+
 void
 tcursor(int mode) {
 	static TCursor c;
@@ -781,12 +882,16 @@ tcursor(int mode) {
 
 void
 treset(void) {
+	unsigned i;
 	term.c = (TCursor){{
 		.mode = ATTR_NULL,
 		.fg = DefaultFG,
 		.bg = DefaultBG
 	}, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
-	
+
+	memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+	for(i = TAB; i < term.col; i += TAB)
+		term.tabs[i] = 1;
 	term.top = 0, term.bot = term.row - 1;
 	term.mode = MODE_WRAP;
 	tclearregion(0, 0, term.col-1, term.row-1);
@@ -799,12 +904,14 @@ tnew(int col, int row) {
 	term.line = malloc(term.row * sizeof(Line));
 	term.alt  = malloc(term.row * sizeof(Line));
 	term.dirty = malloc(term.row * sizeof(*term.dirty));
+	term.tabs = malloc(term.col * sizeof(*term.tabs));
 
 	for(row = 0; row < term.row; row++) {
 		term.line[row] = malloc(term.col * sizeof(Glyph));
 		term.alt [row] = malloc(term.col * sizeof(Glyph));
 		term.dirty[row] = 0;
 	}
+	memset(term.tabs, 0, term.col * sizeof(*term.tabs));
 	/* setup screen */
 	treset();
 }
@@ -822,11 +929,11 @@ void
 tscrolldown(int orig, int n) {
 	int i;
 	Line temp;
-	
+
 	LIMIT(n, 0, term.bot-orig+1);
 
 	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];
@@ -844,9 +951,9 @@ 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);
-	
+
 	for(i = orig; i <= term.bot-n; i++) {
 		 temp = term.line[i];
 		 term.line[i] = term.line[i+n];
@@ -863,7 +970,7 @@ void
 selscroll(int orig, int n) {
 	if(sel.bx == -1)
 		return;
-	
+
 	if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
 		if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
 			sel.bx = -1;
@@ -895,22 +1002,22 @@ tnewline(int first_col) {
 void
 csiparse(void) {
 	/* int noarg = 1; */
-	char *p = escseq.buf;
+	char *p = csiescseq.buf;
 
-	escseq.narg = 0;
+	csiescseq.narg = 0;
 	if(*p == '?')
-		escseq.priv = 1, p++;
-	
-	while(p < escseq.buf+escseq.len) {
+		csiescseq.priv = 1, p++;
+
+	while(p < csiescseq.buf+csiescseq.len) {
 		while(isdigit(*p)) {
-			escseq.arg[escseq.narg] *= 10;
-			escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
+			csiescseq.arg[csiescseq.narg] *= 10;
+			csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
 		}
-		if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
-			escseq.narg++, p++;
+		if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
+			csiescseq.narg++, p++;
 		else {
-			escseq.mode = *p;
-			escseq.narg++;
+			csiescseq.mode = *p;
+			csiescseq.narg++;
 			return;
 		}
 	}
@@ -959,7 +1066,7 @@ tdeletechar(int n) {
 	int src = term.c.x + n;
 	int dst = term.c.x;
 	int size = term.col - src;
-	
+
 	term.dirty[term.c.y] = 1;
 
 	if(src >= term.col) {
@@ -1016,6 +1123,9 @@ tsetattr(int *attr, int l) {
 		case 1:
 			term.c.attr.mode |= ATTR_BOLD;
 			break;
+		case 3: /* enter standout (highlight) */
+			term.c.attr.mode |= ATTR_ITALIC;
+			break;
 		case 4:
 			term.c.attr.mode |= ATTR_UNDERLINE;
 			break;
@@ -1025,6 +1135,9 @@ tsetattr(int *attr, int l) {
 		case 22:
 			term.c.attr.mode &= ~ATTR_BOLD;
 			break;
+		case 23: /* leave standout (highlight) mode */
+			term.c.attr.mode &= ~ATTR_ITALIC;
+			break;
 		case 24:
 			term.c.attr.mode &= ~ATTR_UNDERLINE;
 			break;
@@ -1040,7 +1153,7 @@ tsetattr(int *attr, int l) {
 					fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
 			}
 			else
-				fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
+				fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
 			break;
 		case 39:
 			term.c.attr.fg = DefaultFG;
@@ -1054,7 +1167,7 @@ tsetattr(int *attr, int l) {
 					fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
 			}
 			else
-				fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
+				fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
 			break;
 		case 49:
 			term.c.attr.bg = DefaultBG;
@@ -1069,8 +1182,7 @@ tsetattr(int *attr, int l) {
 			else if(BETWEEN(attr[i], 100, 107))
 				term.c.attr.fg = attr[i] - 100 + 8;
 			else
-				fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
-			
+				fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]), csidump();
 			break;
 		}
 	}
@@ -1091,9 +1203,82 @@ 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;
+
+	for(lim = args + narg; args < lim; ++args) {
+		if(priv) {
+			switch(*args) {
+			case 1:
+				MODBIT(term.mode, set, MODE_APPKEYPAD);
+				break;
+			case 5: /* DECSCNM -- Reverve video */
+				mode = term.mode;
+				MODBIT(term.mode,set, MODE_REVERSE);
+				if(mode != term.mode)
+					redraw();
+				break;
+			case 7:
+				MODBIT(term.mode, set, MODE_WRAP);
+				break;
+			case 20:
+				MODBIT(term.mode, set, MODE_CRLF);
+				break;
+			case 12: /* att610 -- Start blinking cursor (IGNORED) */
+				break;
+			case 25:
+				MODBIT(term.c.state, !set, CURSOR_HIDE);
+				break;
+			case 1000: /* 1000,1002: enable xterm mouse report */
+				MODBIT(term.mode, set, MODE_MOUSEBTN);
+				break;
+			case 1002:
+				MODBIT(term.mode, set, MODE_MOUSEMOTION);
+				break;
+			case 1049: /* = 1047 and 1048 */
+			case 47:
+			case 1047:
+				if(IS_SET(MODE_ALTSCREEN))
+					tclearregion(0, 0, term.col-1, term.row-1);
+				if((set && !IS_SET(MODE_ALTSCREEN)) ||
+				    (!set && IS_SET(MODE_ALTSCREEN))) {
+					    tswapscreen();
+				}
+				if(*args != 1049)
+					break;
+				/* pass through */
+			case 1048:
+				tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
+				break;
+			default:
+				fprintf(stderr,
+					"erresc: unknown private set/reset mode %d\n",
+					*args);
+				break;
+			}
+		} else {
+			switch(*args) {
+			case 4:
+				MODBIT(term.mode, set, MODE_INSERT);
+				break;
+			default:
+				fprintf(stderr,
+					"erresc: unknown set/reset mode %d\n",
+					*args);
+				break;
+			}
+		}
+	}
+}
+#undef MODBIT
+
+
 void
 csihandle(void) {
-	switch(escseq.mode) {
+	switch(csiescseq.mode) {
 	default:
 	unknown:
 		fprintf(stderr, "erresc: unknown csi ");
@@ -1101,50 +1286,66 @@ csihandle(void) {
 		/* die(""); */
 		break;
 	case '@': /* ICH -- Insert <n> blank char */
-		DEFAULT(escseq.arg[0], 1);
-		tinsertblank(escseq.arg[0]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tinsertblank(csiescseq.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]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
 		break;
 	case 'B': /* CUD -- Cursor <n> Down */
-		DEFAULT(escseq.arg[0], 1);
-		tmoveto(term.c.x, term.c.y+escseq.arg[0]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tmoveto(term.c.x, term.c.y+csiescseq.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);
+		DEFAULT(csiescseq.arg[0], 1);
+		tmoveto(term.c.x+csiescseq.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);
+		DEFAULT(csiescseq.arg[0], 1);
+		tmoveto(term.c.x-csiescseq.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]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tmoveto(0, term.c.y+csiescseq.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]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tmoveto(0, term.c.y-csiescseq.arg[0]);
+		break;
+	case 'g': /* TBC -- Tabulation clear */
+		switch (csiescseq.arg[0]) {
+		case 0: /* clear current tab stop */
+			term.tabs[term.c.x] = 0;
+			break;
+		case 3: /* clear all the tabs */
+			memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+			break;
+		default:
+			goto unknown;
+		}
 		break;
 	case 'G': /* CHA -- Move to <col> */
-	case '`': /* XXX: HPA -- same? */
-		DEFAULT(escseq.arg[0], 1);
-		tmoveto(escseq.arg[0]-1, term.c.y);
+	case '`': /* HPA */
+		DEFAULT(csiescseq.arg[0], 1);
+		tmoveto(csiescseq.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);
+	case 'f': /* HVP */
+		DEFAULT(csiescseq.arg[0], 1);
+		DEFAULT(csiescseq.arg[1], 1);
+		tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
+		break;
+	case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
+		DEFAULT(csiescseq.arg[0], 1);
+		while(csiescseq.arg[0]--)
+			tputtab(1);
 		break;
-	/* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
 	case 'J': /* ED -- Clear screen */
 		sel.bx = -1;
-		switch(escseq.arg[0]) {
+		switch(csiescseq.arg[0]) {
 		case 0: /* below */
 			tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 			if(term.c.y < term.row-1)
@@ -1163,7 +1364,7 @@ csihandle(void) {
 		}
 		break;
 	case 'K': /* EL -- Clear line */
-		switch(escseq.arg[0]) {
+		switch(csiescseq.arg[0]) {
 		case 0: /* right */
 			tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
 			break;
@@ -1176,152 +1377,54 @@ csihandle(void) {
 		}
 		break;
 	case 'S': /* SU -- Scroll <n> line up */
-		DEFAULT(escseq.arg[0], 1);
-		tscrollup(term.top, escseq.arg[0]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tscrollup(term.top, csiescseq.arg[0]);
 		break;
 	case 'T': /* SD -- Scroll <n> line down */
-		DEFAULT(escseq.arg[0], 1);
-		tscrolldown(term.top, escseq.arg[0]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tscrolldown(term.top, csiescseq.arg[0]);
 		break;
 	case 'L': /* IL -- Insert <n> blank lines */
-		DEFAULT(escseq.arg[0], 1);
-		tinsertblankline(escseq.arg[0]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tinsertblankline(csiescseq.arg[0]);
 		break;
 	case 'l': /* RM -- Reset Mode */
-		if(escseq.priv) {
-			switch(escseq.arg[0]) {
-			case 1:
-				term.mode &= ~MODE_APPKEYPAD;
-				break;
-			case 5: /* DECSCNM -- Remove reverse video */
-				if(IS_SET(MODE_REVERSE)) {
-					term.mode &= ~MODE_REVERSE;
-					draw();
-				}
-				break;
-			case 7:
-				term.mode &= ~MODE_WRAP;
-				break;
-			case 12: /* att610 -- Stop blinking cursor (IGNORED) */
-				break;
-			case 20:
-				term.mode &= ~MODE_CRLF;
-				break;
-			case 25:
-				term.c.state |= CURSOR_HIDE;
-				break;
-			case 1000: /* disable X11 xterm mouse reporting */
-				term.mode &= ~MODE_MOUSEBTN;
-				break;
-			case 1002:
-				term.mode &= ~MODE_MOUSEMOTION;
-				break;
-			case 1049: /* = 1047 and 1048 */
-			case 47:
-			case 1047:
-				if(IS_SET(MODE_ALTSCREEN)) {
-					tclearregion(0, 0, term.col-1, term.row-1);
-					tswapscreen();
-				}
-				if(escseq.arg[0] != 1049)
-					break;
-			case 1048:
-				tcursor(CURSOR_LOAD);
-				break;
-			default:
-				goto unknown;
-			}
-		} else {
-			switch(escseq.arg[0]) {
-			case 4:
-				term.mode &= ~MODE_INSERT;
-				break;
-			default:
-				goto unknown;
-			}
-		}
+		tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
 		break;
 	case 'M': /* DL -- Delete <n> lines */
-		DEFAULT(escseq.arg[0], 1);
-		tdeleteline(escseq.arg[0]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tdeleteline(csiescseq.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);
+		DEFAULT(csiescseq.arg[0], 1);
+		tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0], term.c.y);
 		break;
 	case 'P': /* DCH -- Delete <n> char */
-		DEFAULT(escseq.arg[0], 1);
-		tdeletechar(escseq.arg[0]);
+		DEFAULT(csiescseq.arg[0], 1);
+		tdeletechar(csiescseq.arg[0]);
+		break;
+	case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
+		DEFAULT(csiescseq.arg[0], 1);
+		while(csiescseq.arg[0]--)
+			tputtab(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);
+		DEFAULT(csiescseq.arg[0], 1);
+		tmoveto(term.c.x, csiescseq.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 5: /* DECSCNM -- Reverve video */
-				if(!IS_SET(MODE_REVERSE)) {
-					term.mode |= MODE_REVERSE;
-					draw();
-				}
-				break;
-			case 7:
-				term.mode |= MODE_WRAP;
-				break;
-			case 20:
-				term.mode |= MODE_CRLF;
-				break;
-			case 12: /* att610 -- Start blinking cursor (IGNORED) */
-				 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
-				if(escseq.narg > 1 && escseq.arg[1] != 25)
-					break;
-			case 25:
-				term.c.state &= ~CURSOR_HIDE;
-				break;
-			case 1000: /* 1000,1002: enable xterm mouse report */
-				term.mode |= MODE_MOUSEBTN;
-				break;
-			case 1002:
-				term.mode |= MODE_MOUSEMOTION;
-				break;
-			case 1049: /* = 1047 and 1048 */
-			case 47:
-			case 1047:
-				if(IS_SET(MODE_ALTSCREEN))
-					tclearregion(0, 0, term.col-1, term.row-1);
-				else
-					tswapscreen();
-				if(escseq.arg[0] != 1049)
-					break;
-			case 1048:
-				tcursor(CURSOR_SAVE);
-				break;
-			default: goto unknown;
-			}
-		} else {
-			switch(escseq.arg[0]) {
-			case 4:
-				term.mode |= MODE_INSERT;
-				break;
-			default: goto unknown;
-			}
-		};
+		tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
 		break;
 	case 'm': /* SGR -- Terminal attribute (color) */
-		tsetattr(escseq.arg, escseq.narg);
+		tsetattr(csiescseq.arg, csiescseq.narg);
 		break;
 	case 'r': /* DECSTBM -- Set Scrolling Region */
-		if(escseq.priv)
+		if(csiescseq.priv)
 			goto unknown;
 		else {
-			DEFAULT(escseq.arg[0], 1);
-			DEFAULT(escseq.arg[1], term.row);
-			tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
+			DEFAULT(csiescseq.arg[0], 1);
+			DEFAULT(csiescseq.arg[1], term.row);
+			tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
 			tmoveto(0, 0);
 		}
 		break;
@@ -1337,50 +1440,150 @@ csihandle(void) {
 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);
+	printf("ESC[");
+	for(i = 0; i < csiescseq.len; i++) {
+		uint c = csiescseq.buf[i] & 0xff;
+		if(isprint(c)) putchar(c);
+		else if(c == '\n') printf("(\\n)");
+		else if(c == '\r') printf("(\\r)");
+		else if(c == 0x1b) printf("(\\e)");
+		else printf("(%02x)", c);
+	}
 	putchar('\n');
 }
 
 void
 csireset(void) {
-	memset(&escseq, 0, sizeof(escseq));
+	memset(&csiescseq, 0, sizeof(csiescseq));
+}
+
+void
+strhandle(void) {
+	char *p;
+
+	/*
+	 * TODO: make this being useful in case of color palette change.
+	 */
+	strparse();
+
+	p = strescseq.buf;
+
+	switch(strescseq.type) {
+	case ']': /* OSC -- Operating System Command */
+		switch(p[0]) {
+		case '0':
+		case '1':
+		case '2':
+			/*
+			 * TODO: Handle special chars in string, like umlauts.
+			 */
+			if(p[1] == ';') {
+				XStoreName(xw.dpy, xw.win, strescseq.buf+2);
+			}
+			break;
+		case ';':
+			XStoreName(xw.dpy, xw.win, strescseq.buf+1);
+			break;
+		case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
+			break;
+		default:
+			fprintf(stderr, "erresc: unknown str ");
+			strdump();
+			break;
+		}
+		break;
+	case 'P': /* DSC -- Device Control String */
+	case '_': /* APC -- Application Program Command */
+	case '^': /* PM -- Privacy Message */
+	default:
+		fprintf(stderr, "erresc: unknown str ");
+		strdump();
+		/* die(""); */
+		break;
+	}
+}
+
+void
+strparse(void) {
+	/*
+	 * TODO: Implement parsing like for CSI when required.
+	 * Format: ESC type cmd ';' arg0 [';' argn] ESC \
+	 */
+	return;
+}
+
+void
+strdump(void) {
+	int i;
+	printf("ESC%c", strescseq.type);
+	for(i = 0; i < strescseq.len; i++) {
+		uint c = strescseq.buf[i] & 0xff;
+		if(isprint(c)) putchar(c);
+		else if(c == '\n') printf("(\\n)");
+		else if(c == '\r') printf("(\\r)");
+		else if(c == 0x1b) printf("(\\e)");
+		else printf("(%02x)", c);
+	}
+	printf("ESC\\\n");
 }
 
 void
-tputtab(void) {
-	int space = TAB - term.c.x % TAB;
-	tmoveto(term.c.x + space, term.c.y);
+strreset(void) {
+	memset(&strescseq, 0, sizeof(strescseq));
+}
+
+void
+tputtab(bool forward) {
+	unsigned 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 */ ;
+	}
+	tmoveto(x, term.c.y);
 }
 
 void
 tputc(char *c) {
 	char ascii = *c;
+
+	if(fileio)
+		putc(ascii, fileio);
+
 	if(term.esc & ESC_START) {
 		if(term.esc & ESC_CSI) {
-			escseq.buf[escseq.len++] = ascii;
-			if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
+			csiescseq.buf[csiescseq.len++] = ascii;
+			if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
 				term.esc = 0;
 				csiparse(), csihandle();
 			}
-			/* TODO: handle other OSC */
-		} else if(term.esc & ESC_OSC) {
-			if(ascii == ';') {
-				term.titlelen = 0;
-				term.esc = ESC_START | ESC_TITLE;
-			}
-		} else if(term.esc & ESC_TITLE) {
-			if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
+		} 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;
-				term.title[term.titlelen] = '\0';
-				XStoreName(xw.dpy, xw.win, term.title);
-			} else {
-				term.title[term.titlelen++] = ascii;
+				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 == '\\')
+				strhandle();
 		} else if(term.esc & ESC_ALTCHARSET) {
 			switch(ascii) {
 			case '0': /* Line drawing crap */
@@ -1398,8 +1601,13 @@ tputc(char *c) {
 			case '[':
 				term.esc |= ESC_CSI;
 				break;
-			case ']':
-				term.esc |= ESC_OSC;
+			case 'P': /* DCS -- Device Control String */
+			case '_': /* APC -- Application Program Command */
+			case '^': /* PM -- Privacy Message */
+			case ']': /* OSC -- Operating System Command */
+				strreset();
+				strescseq.type = ascii;
+				term.esc |= ESC_STR;
 				break;
 			case '(':
 				term.esc |= ESC_ALTCHARSET;
@@ -1415,6 +1623,10 @@ tputc(char *c) {
 				tnewline(1); /* always go to first col */
 				term.esc = 0;
 				break;
+			case 'H': /* HTS -- Horizontal tab stop */
+				term.tabs[term.c.x] = 1;
+				term.esc = 0;
+				break;
 			case 'M': /* RI -- Reverse index */
 				if(term.c.y == term.top)
 					tscrolldown(term.top, 1);
@@ -1442,9 +1654,12 @@ tputc(char *c) {
 				tcursor(CURSOR_LOAD);
 				term.esc = 0;
 				break;
+			case '\\': /* ST -- Stop */
+				term.esc = 0;
+				break;
 			default:
 				fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
-				    (unsigned char) ascii, isprint(ascii)?ascii:'.');
+				    (uchar) ascii, isprint(ascii)?ascii:'.');
 				term.esc = 0;
 			}
 		}
@@ -1453,7 +1668,7 @@ tputc(char *c) {
 			sel.bx = -1;
 		switch(ascii) {
 		case '\t':
-			tputtab();
+			tputtab(1);
 			break;
 		case '\b':
 			tmoveto(term.c.x-1, term.c.y);
@@ -1519,6 +1734,7 @@ tresize(int col, int row) {
 	term.line = realloc(term.line, row * sizeof(Line));
 	term.alt  = realloc(term.alt,  row * sizeof(Line));
 	term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
+	term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
 
 	/* resize each row to new width, zero-pad if needed */
 	for(i = 0; i < minrow; i++) {
@@ -1537,7 +1753,15 @@ tresize(int col, int row) {
 		term.line[i] = calloc(col, sizeof(Glyph));
 		term.alt [i] = calloc(col, sizeof(Glyph));
 	}
-	
+	if(col > term.col) {
+		bool *bp = term.tabs + term.col;
+
+		memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
+		while(--bp > term.tabs && !*bp)
+			/* nothing */ ;
+		for(bp += TAB; bp < term.tabs + col; bp += TAB)
+			*bp = 1;
+	}
 	/* update terminal size */
 	term.col = col, term.row = row;
 	/* make use of the LIMIT in tmoveto */
@@ -1550,41 +1774,20 @@ tresize(int col, int row) {
 
 void
 xresize(int col, int row) {
-	Pixmap newbuf;
-	int oldw, oldh;
-
-	oldw = xw.bufw;
-	oldh = xw.bufh;
-	xw.bufw = MAX(1, col * xw.cw);
-	xw.bufh = MAX(1, row * xw.ch);
-	newbuf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
-	XCopyArea(xw.dpy, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
-	XFreePixmap(xw.dpy, xw.buf);
-	XSetForeground(xw.dpy, dc.gc, dc.col[DefaultBG]);
-	if(xw.bufw > oldw)
-		XFillRectangle(xw.dpy, newbuf, dc.gc, oldw, 0,
-				xw.bufw-oldw, MIN(xw.bufh, oldh));
-	else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
-		XClearArea(xw.dpy, xw.win, BORDER+xw.bufw, BORDER,
-				xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
-				False);
-	if(xw.bufh > oldh)
-		XFillRectangle(xw.dpy, newbuf, dc.gc, 0, oldh,
-				xw.bufw, xw.bufh-oldh);
-	else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
-		XClearArea(xw.dpy, xw.win, BORDER, BORDER+xw.bufh,
-				xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
-				False);
-	xw.buf = newbuf;
+	xw.w = MAX(1, 2*BORDER + col * xw.cw);
+	xw.h = MAX(1, 2*BORDER + row * xw.ch);
 }
 
 void
 xloadcols(void) {
 	int i, r, g, b;
 	XColor color;
-	unsigned long white = WhitePixel(xw.dpy, xw.scr);
+	ulong white = WhitePixel(xw.dpy, xw.scr);
 
+	/* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
 	for(i = 0; i < LEN(colorname); i++) {
+		if(!colorname[i])
+			continue;
 		if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
 			dc.col[i] = white;
 			fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
@@ -1592,8 +1795,8 @@ xloadcols(void) {
 			dc.col[i] = color.pixel;
 	}
 
-	/* same colors as xterm */
-	for(r = 0; r < 6; r++)
+	/* load colors [16-255] ; same colors as xterm */
+	for(i = 16, r = 0; r < 6; r++)
 		for(g = 0; g < 6; g++)
 			for(b = 0; b < 6; b++) {
 				color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
@@ -1609,7 +1812,7 @@ xloadcols(void) {
 
 	for(r = 0; r < 24; r++, i++) {
 		color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
-		if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
+		if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
 			dc.col[i] = white;
 			fprintf(stderr, "Could not allocate color %d\n", i);
 		} else
@@ -1621,24 +1824,33 @@ void
 xclear(int x1, int y1, int x2, int y2) {
 	XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
 	XFillRectangle(xw.dpy, xw.buf, dc.gc,
-	               x1 * xw.cw, y1 * xw.ch,
-	               (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
+		       BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
+		       (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
 }
 
 void
 xhints(void) {
 	XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
 	XWMHints wm = {.flags = InputHint, .input = 1};
-	XSizeHints size = {
-		.flags = PSize | PResizeInc | PBaseSize,
-		.height = xw.h,
-		.width = xw.w,
-		.height_inc = xw.ch,
-		.width_inc = xw.cw,
-		.base_height = 2*BORDER,
-		.base_width = 2*BORDER,
-	};
-	XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
+	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*BORDER;
+		sizeh->base_width = 2*BORDER;
+	} 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);
+	XFree(sizeh);
 }
 
 XFontSet
@@ -1675,14 +1887,20 @@ xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rb
 }
 
 void
-initfonts(char *fontstr, char *bfontstr) {
-	if((dc.font.set = xinitfont(fontstr)) == NULL ||
-	   (dc.bfont.set = xinitfont(bfontstr)) == NULL)
-		die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
+initfonts(char *fontstr, char *bfontstr, char *ifontstr) {
+	if((dc.font.set = xinitfont(fontstr)) == NULL)
+		die("Can't load font %s\n", fontstr);
+	if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
+		die("Can't load bfont %s\n", bfontstr);
+	if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
+		die("Can't load ifont %s\n", ifontstr);
+
 	xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
 	    &dc.font.lbearing, &dc.font.rbearing);
 	xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
 	    &dc.bfont.lbearing, &dc.bfont.rbearing);
+	xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
+	    &dc.ifont.lbearing, &dc.ifont.rbearing);
 }
 
 void
@@ -1690,13 +1908,33 @@ xinit(void) {
 	XSetWindowAttributes attrs;
 	Cursor cursor;
 	Window parent;
+	int sw, sh;
 
 	if(!(xw.dpy = XOpenDisplay(NULL)))
 		die("Can't open display\n");
 	xw.scr = XDefaultScreen(xw.dpy);
-	
+
+	/* 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*BORDER + term.row * xw.ch;
+		xw.w = 2*BORDER + term.col * xw.cw;
+		xw.fx = 0;
+		xw.fy = 0;
+	}
+
 	/* font */
-	initfonts(FONT, BOLDFONT);
+	initfonts(FONT, BOLDFONT, ITALICFONT);
 
 	/* XXX: Assuming same size for bold font */
 	xw.cw = dc.font.rbearing - dc.font.lbearing;
@@ -1706,12 +1944,6 @@ xinit(void) {
 	xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
 	xloadcols();
 
-	/* window - default size */
-	xw.bufh = term.row * xw.ch;
-	xw.bufw = term.col * xw.cw;
-	xw.h = xw.bufh + 2*BORDER;
-	xw.w = xw.bufw + 2*BORDER;
-
 	attrs.background_pixel = dc.col[DefaultBG];
 	attrs.border_pixel = dc.col[DefaultBG];
 	attrs.bit_gravity = NorthWestGravity;
@@ -1722,13 +1954,13 @@ xinit(void) {
 	attrs.colormap = xw.cmap;
 
 	parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
-	xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
+	xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
 			xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
 			XDefaultVisual(xw.dpy, xw.scr),
 			CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
 			| CWColormap,
 			&attrs);
-	xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dpy, xw.scr));
+	xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
 
 
 	/* input methods */
@@ -1738,7 +1970,7 @@ xinit(void) {
 					   XNFocusWindow, xw.win, NULL);
 	/* gc */
 	dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
-	
+
 	/* white cursor, black outline */
 	cursor = XCreateFontCursor(xw.dpy, XC_xterm);
 	XDefineCursor(xw.dpy, xw.win, cursor);
@@ -1756,27 +1988,36 @@ xinit(void) {
 
 void
 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
-	unsigned long xfg = dc.col[base.fg], xbg = dc.col[base.bg], temp;
-	int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
+	int fg = base.fg, bg = base.bg, temp;
+	int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
+	XFontSet fontset = dc.font.set;
 	int i;
-	
+
 	/* only switch default fg/bg if term is in RV mode */
 	if(IS_SET(MODE_REVERSE)) {
-		if(base.fg == DefaultFG)
-			xfg = dc.col[DefaultBG];
-		if(base.bg == DefaultBG)
-			xbg = dc.col[DefaultFG];
+		if(fg == DefaultFG)
+			fg = DefaultBG;
+		if(bg == DefaultBG)
+			bg = DefaultFG;
 	}
 
 	if(base.mode & ATTR_REVERSE)
-		temp = xfg, xfg = xbg, xbg = temp;
+		temp = fg, fg = bg, bg = temp;
 
-	XSetBackground(xw.dpy, dc.gc, xbg);
-	XSetForeground(xw.dpy, dc.gc, xfg);
+	if(base.mode & ATTR_BOLD) {
+		fg += 8;
+		fontset = dc.bfont.set;
+	}
+
+	if(base.mode & ATTR_ITALIC)
+		fontset = dc.ifont.set;
+
+	XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
+	XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
 
 	if(base.mode & ATTR_GFX) {
 		for(i = 0; i < bytelen; i++) {
-			char c = gfx[(unsigned int)s[i] % 256];
+			char c = gfx[(uint)s[i] % 256];
 			if(c)
 				s[i] = c;
 			else if(s[i] > 0x5f)
@@ -1784,19 +2025,18 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
 		}
 	}
 
-	XmbDrawImageString(xw.dpy, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
-		dc.gc, winx, winy, s, bytelen);
-	
+	XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
+
 	if(base.mode & ATTR_UNDERLINE)
 		XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
 }
 
 /* copy buffer pixmap to screen pixmap */
 void
-xcopy(int x, int y, int cols, int rows) {
-	int src_x = x*xw.cw, src_y = y*xw.ch, src_w = cols*xw.cw, src_h = rows*xw.ch;
-	int dst_x = BORDER+src_x, dst_y = BORDER+src_y;
-	XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, src_x, src_y, src_w, src_h, dst_x, dst_y);
+xcopy() {
+	XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
+	XdbeSwapBuffers(xw.dpy, swpinfo, 1);
+
 }
 
 void
@@ -1805,10 +2045,10 @@ xdrawcursor(void) {
 	static int oldy = 0;
 	int sl;
 	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)
 		memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
 
@@ -1822,10 +2062,14 @@ xdrawcursor(void) {
 	xcopy(oldx, oldy, 1, 1);
 
 	/* draw the new one */
-	if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
-		sl = utf8size(g.c);
+	if(!(term.c.state & CURSOR_HIDE)) {
+		if(!(xw.state & WIN_FOCUSED))
+			g.bg = DefaultUCS;
+
 		if(IS_SET(MODE_REVERSE))
 			g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
+
+		sl = utf8size(g.c);
 		xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
 		oldx = term.c.x, oldy = term.c.y;
 	}
@@ -1833,9 +2077,18 @@ xdrawcursor(void) {
 	xcopy(term.c.x, term.c.y, 1, 1);
 }
 
+void
+redraw(void) {
+	struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
+	tfulldirt();
+	draw();
+	nanosleep(&tv, NULL);
+}
+
 void
 draw() {
 	drawregion(0, 0, term.col, term.row);
+	xcopy();
 	gettimeofday(&xw.lastdraw, NULL);
 }
 
@@ -1844,7 +2097,10 @@ drawregion(int x1, int y1, int x2, int y2) {
 	int ic, ib, x, y, ox, sl;
 	Glyph base, new;
 	char buf[DRAW_BUF_SIZ];
+	bool ena_sel = sel.bx != -1, alt = IS_SET(MODE_ALTSCREEN);
 
+	if((sel.alt && !alt) || (!sel.alt && alt))
+		ena_sel = 0;
 	if(!(xw.state & WIN_VISIBLE))
 		return;
 
@@ -1857,7 +2113,7 @@ drawregion(int x1, int y1, int x2, int y2) {
 		ic = ib = ox = 0;
 		for(x = x1; x < x2; x++) {
 			new = term.line[y][x];
-			if(sel.bx != -1 && *(new.c) && selected(x, y))
+			if(ena_sel && *(new.c) && selected(x, y))
 				new.mode ^= ATTR_REVERSE;
 			if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
 						  ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
@@ -1877,7 +2133,6 @@ drawregion(int x1, int y1, int x2, int y2) {
 		}
 		if(ib > 0)
 			xdraws(buf, base, ox, y, ic, ib);
-		xcopy(0, y, term.col, 1);
 	}
 	xdrawcursor();
 }
@@ -1886,13 +2141,10 @@ void
 expose(XEvent *ev) {
 	XExposeEvent *e = &ev->xexpose;
 	if(xw.state & WIN_REDRAW) {
-		if(!e->count) {
+		if(!e->count)
 			xw.state &= ~WIN_REDRAW;
-			xcopy(0, 0, term.col, term.row);
-		}
-	} else
-		XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
-				e->width, e->height, e->x, e->y);
+	}
+	xcopy();
 }
 
 void
@@ -1929,11 +2181,11 @@ focus(XEvent *ev) {
 }
 
 char*
-kmap(KeySym k, unsigned int state) {
+kmap(KeySym k, uint state) {
 	int i;
 	state &= ~Mod2Mask;
 	for(i = 0; i < LEN(key); i++) {
-		unsigned int mask = key[i].mask;
+		uint mask = key[i].mask;
 		if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
 			return (char*)key[i].s;
 	}
@@ -1954,7 +2206,7 @@ kpress(XEvent *ev) {
 	meta = e->state & Mod1Mask;
 	shift = e->state & ShiftMask;
 	len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
-	
+
 	/* 1. custom keys from config.h */
 	if((customkey = kmap(ksym, e->state)))
 		ttywrite(customkey, strlen(customkey));
@@ -1994,11 +2246,11 @@ void
 cmessage(XEvent *e) {
 	/* See xembed specs
 	   http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
-	if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
-		if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
+	if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
+		if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
 			xw.state |= WIN_FOCUSED;
 			xseturgency(0);
-		} else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
+		} else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
 			xw.state &= ~WIN_FOCUSED;
 		}
 		draw();
@@ -2008,10 +2260,10 @@ cmessage(XEvent *e) {
 void
 resize(XEvent *e) {
 	int col, row;
-	
+
 	if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
 		return;
-	
+
 	xw.w = e->xconfigure.width;
 	xw.h = e->xconfigure.height;
 	col = (xw.w - 2*BORDER) / xw.cw;
@@ -2020,11 +2272,11 @@ resize(XEvent *e) {
 		return;
 	if(tresize(col, row))
 		draw();
-	ttyresize(col, row);
 	xresize(col, row);
+	ttyresize(col, row);
 }
 
-int
+bool
 last_draw_too_old(void) {
 	struct timeval now;
 	gettimeofday(&now, NULL);
@@ -2037,8 +2289,8 @@ run(void) {
 	fd_set rfd;
 	int xfd = XConnectionNumber(xw.dpy);
 	struct timeval timeout = {0};
-	int stuff_to_print = 0;
-	
+	bool stuff_to_print = 0;
+
 	for(;;) {
 		FD_ZERO(&rfd);
 		FD_SET(cmdfd, &rfd);
@@ -2072,8 +2324,12 @@ run(void) {
 
 int
 main(int argc, char *argv[]) {
-	int i;
-	
+	int i, bitm, xr, yr;
+	unsigned int wr, hr;
+
+	xw.fw = xw.fh = xw.fx = xw.fy = 0;
+	xw.isfixed = False;
+
 	for(i = 1; i < argc; i++) {
 		switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
 		case 't':
@@ -2085,10 +2341,34 @@ main(int argc, char *argv[]) {
 		case 'w':
 			if(++i < argc) opt_embed = argv[i];
 			break;
+		case 'f':
+			if(++i < argc) opt_io = argv[i];
+			break;
 		case 'e':
 			/* eat every remaining arguments */
 			if(++i < argc) opt_cmd = &argv[i];
 			goto run;
+		case 'g':
+			if(++i >= argc)
+				break;
+
+			bitm = XParseGeometry(argv[i], &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 & XNegative && xw.fy == 0)
+				xw.fy = -1;
+
+			if(xw.fh != 0 && xw.fw != 0)
+				xw.isfixed = True;
+			break;
 		case 'v':
 		default:
 			die(USAGE);
@@ -2104,3 +2384,4 @@ main(int argc, char *argv[]) {
 	run();
 	return 0;
 }
+