X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=st.c;h=ca5fb5dab34dbc2b5a4082ca7676f2316aff773e;hb=e6b3f5c755349ba7a339dd43958870e4cceb57bf;hp=a203c72cfb9e1c0093b6acda7e6bfcc4359f22f6;hpb=8b4bfe31ec1075316dbb2e7d21753771ae3e5590;p=st.git

diff --git a/st.c b/st.c
index a203c72..ca5fb5d 100644
--- a/st.c
+++ b/st.c
@@ -1,9 +1,9 @@
 /* See LICENSE for licence details. */
-/* See LICENSE for licence details. */
-#define _XOPEN_SOURCE
+#define _XOPEN_SOURCE 600
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <limits.h>
 #include <locale.h>
 #include <stdarg.h>
 #include <stdio.h>
@@ -20,11 +20,13 @@
 #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)
 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
@@ -33,22 +35,19 @@
 #define DEFAULT(a, b)     (a) = (a) ? (a) : (b)    
 #define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
 #define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
+#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
 
 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
-enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4 };
-enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSwrap, CSsave, CSload };
-enum { CRset=1 , CRupdate=2 };
-enum { TMwrap=1 , TMinsert=2, TMaltcharset };
+enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4, ATgfx=8 };
+enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSsave, CSload };
+enum { CRset=1, CRupdate=2 };
+enum { TMwrap=1, TMinsert=2 };
+enum { ESCin=1, ESCcsi=2, ESCosc=4, ESCtitle=8, ESCcharset=16 };
 enum { SCupdate, SCredraw };
 
 typedef int Color;
 
 typedef struct {
-	KeySym k;
-	char s[ESCSIZ];
-} Key;
-
-typedef struct {
 	char c;     /* character code  */
 	char mode;  /* attribute flags */
 	Color fg;   /* foreground      */
@@ -65,17 +64,16 @@ typedef struct {
 	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 */
-	int len;            /* raw string length */
-	char pre;           
+	char buf[ESCSIZ]; /* raw string */
+	int len;          /* raw string length */
 	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 {
@@ -86,6 +84,9 @@ 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 */
@@ -99,6 +100,11 @@ typedef struct {
 	int cw; /* char width  */
 } XWindow; 
 
+typedef struct {
+	KeySym k;
+	char s[ESCSIZ];
+} Key;
+
 #include "config.h"
 
 /* Drawing Context */
@@ -108,62 +114,86 @@ typedef struct {
 	GC gc;
 } DC;
 
-void die(const char *errstr, ...);
-void draw(int);
-void execsh(void);
-void sigchld(int);
-char* kmap(KeySym);
-void kpress(XKeyEvent *);
-void resize(XEvent *);
-void run(void);
-
-int escaddc(char);
-int escfinal(char);
-void escdump(void);
-void eschandle(void);
-void escparse(void);
-void escreset(void);
-
-void tclearregion(int, int, int, int);
-void tcpos(int);
-void tcursor(int);
-void tdeletechar(int);
-void tdeleteline(int);
-void tdump(void);
-void tinsertblank(int);
-void tinsertblankline(int);
-void tmoveto(int, int);
-void tnew(int, int);
-void tnewline(void);
-void tputc(char);
-void tputs(char*, int);
-void tresize(int, int);
-void tscroll(void);
-void tsetattr(int*, int);
-void tsetchar(char);
-void tsetscroll(int, int);
-
-void ttynew(void);
-void ttyread(void);
-void ttyresize(int, int);
-void ttywrite(char *, size_t);
-
-unsigned long xgetcol(const char *);
-void xclear(int, int, int, int);
-void xcursor(int);
-void xdrawc(int, int, Glyph);
-void xinit(void);
-void xscroll(void);
-
+static void die(const char *errstr, ...);
+static void draw(int);
+static void execsh(void);
+static void sigchld(int);
+static void run(void);
+
+static void csidump(void);
+static void csihandle(void);
+static void csiparse(void);
+static void csireset(void);
+
+static void tclearregion(int, int, int, int);
+static void tcpos(int);
+static void tcursor(int);
+static void tdeletechar(int);
+static void tdeleteline(int);
+static void tinsertblank(int);
+static void tinsertblankline(int);
+static void tmoveto(int, int);
+static void tnew(int, int);
+static void tnewline(void);
+static void tputc(char);
+static void tputs(char*, int);
+static void tresize(int, int);
+static void tscroll(void);
+static void tsetattr(int*, int);
+static void tsetchar(char);
+static void tsetscroll(int, int);
+
+static void ttynew(void);
+static void ttyread(void);
+static void ttyresize(int, int);
+static void ttywrite(const char *, size_t);
+
+static unsigned long xgetcol(const char *);
+static void xclear(int, int, int, int);
+static void xcursor(int);
+static void xdrawc(int, int, Glyph);
+static void xinit(void);
+static void xscroll(void);
+
+static void expose(XEvent *);
+static char * kmap(KeySym);
+static void kpress(XEvent *);
+static void resize(XEvent *);
+
+static void (*handler[LASTEvent])(XEvent *) = {
+	[KeyPress] = kpress,
+	[Expose] = expose,
+	[ConfigureNotify] = resize
+};
 
 /* Globals */
-DC dc;
-XWindow xw;
-Term term;
-Escseq escseq;
-int cmdfd;
-pid_t pid;
-int running;
+static DC dc;
+static XWindow xw;
+static Term term;
+static CSIEscape escseq;
+static int cmdfd;
+static pid_t pid;
+static int running;
+
+#ifdef DEBUG
+void
+tdump(void) {
+	int row, col;
+	Glyph c;
+
+	for(row = 0; row < term.row; row++) {
+		for(col = 0; col < term.col; col++) {
+			if(col == term.c.x && row == term.c.y)
+				putchar('#');
+			else {
+				c = term.line[row][col];
+				putchar(c.state & CRset ? c.c : '.');
+			}
+		}
+		putchar('\n');
+	}
+}
+#endif
 
 void
 die(const char *errstr, ...) {
@@ -202,7 +232,6 @@ sigchld(int a) {
 		exit(EXIT_FAILURE);
 }
 
-
 void
 ttynew(void) {
 	int m, s;
@@ -242,7 +271,7 @@ ttynew(void) {
 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");
 }
@@ -262,7 +291,7 @@ ttyread(void) {
 }
 
 void
-ttywrite(char *s, size_t n) {
+ttywrite(const char *s, size_t n) {
 	if(write(cmdfd, s, n) == -1)
 		die("write error on tty: %s\n", SERRNO);
 }
@@ -278,24 +307,6 @@ ttyresize(int x, int y) {
 		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;
@@ -329,62 +340,43 @@ void
 tscroll(void) {
 	Line temp = term.line[term.top];
 	int i;
-
+	/* X stuff _before_ the line swapping (results in wrong line index) */
+	xscroll();
 	for(i = term.top; i < term.bot; i++)
 		term.line[i] = term.line[i+1];
 	memset(temp, 0, sizeof(Glyph) * term.col);
 	term.line[term.bot] = temp;
-	xscroll();	  
 }
 
 void
 tnewline(void) {
 	int y = term.c.y + 1;
-
-	if(y > term.bot) {
+	if(y > term.bot)
 		tscroll(), y = term.bot;
-	}
 	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;
 	}
 }
 
@@ -397,7 +389,7 @@ tmoveto(int x, int y) {
 void
 tcursor(int dir) {
 	int xf = term.c.x, yf = term.c.y;
-
+	
 	switch(dir) {
 	case CSup:
 		yf--;
@@ -407,7 +399,7 @@ tcursor(int dir) {
 		break;
 	case CSleft:
 		xf--;
-		if(xf < 0) {
+		if(term.mode & TMwrap && xf < 0) {
 			xf = term.col-1, yf--;
 			if(yf < term.top)
 				yf = term.top, xf = 0;
@@ -415,7 +407,7 @@ tcursor(int dir) {
 		break;
 	case CSright:
 		xf++;
-		if(xf >= term.col) {
+		if(term.mode & TMwrap && xf >= term.col) {
 			xf = 0, yf++;
 			if(yf > term.bot)
 				yf = term.bot, tscroll();
@@ -424,7 +416,7 @@ tcursor(int dir) {
 	}
 	tmoveto(xf, yf);
 }
-
+	
 void
 tsetchar(char c) {
 	term.line[term.c.y][term.c.x] = term.c.attr;
@@ -478,6 +470,13 @@ tinsertblank(int n) {
 }
 
 void
+tsetlinestate(int n, int state) {
+	int i;
+	for(i = 0; i < term.col; i++)
+		term.line[n][i].state |= state;
+}
+
+void
 tinsertblankline (int n) {
 	int i;
 	Line blank;
@@ -498,10 +497,11 @@ tinsertblankline (int n) {
 		term.line[i-n] = blank;
 		/* blank it */
 		memset(blank, 0, term.col * sizeof(Glyph));
+		tsetlinestate(i, CRupdate);
+		tsetlinestate(i-n, CRupdate);
 	}
 }
 
-
 void
 tdeleteline(int n) {
 	int i;
@@ -523,6 +523,8 @@ tdeleteline(int n) {
 		term.line[i+n] = blank;
 		/* blank it */
 		memset(blank, 0, term.col * sizeof(Glyph));
+		tsetlinestate(i, CRupdate);
+		tsetlinestate(i-n, CRupdate);
 	}
 }
 
@@ -530,48 +532,48 @@ void
 tsetattr(int *attr, int l) {
 	int i;
 
-		for(i = 0; i < l; i++) {
-			switch(attr[i]) {
-			case 0:
-				memset(&term.c.attr, 0, sizeof(term.c.attr));
-				term.c.attr.fg = DefaultFG;
-				term.c.attr.bg = DefaultBG;
-				break;
-			case 1:
-				term.c.attr.mode |= ATbold;	 
-				break;
-			case 4: 
-				term.c.attr.mode |= ATunderline;
-				break;
-			case 7: 
-				term.c.attr.mode |= ATreverse;	
-				break;
-			case 8:
-				term.c.hidden = CShide;
-				break;
-			case 22: 
-				term.c.attr.mode &= ~ATbold;  
-				break;
-			case 24: 
-				term.c.attr.mode &= ~ATunderline;
-				break;
-			case 27: 
-				term.c.attr.mode &= ~ATreverse;	 
-				break;
-			case 39:
-				term.c.attr.fg = DefaultFG;
-				break;
-			case 49:
-				term.c.attr.fg = DefaultBG;
-				break;
-			default:
-				if(BETWEEN(attr[i], 30, 37))
-					term.c.attr.fg = attr[i] - 30;
-				else if(BETWEEN(attr[i], 40, 47))
-					term.c.attr.bg = attr[i] - 40;
-				break;
-			}
+	for(i = 0; i < l; i++) {
+		switch(attr[i]) {
+		case 0:
+			term.c.attr.mode &= ~(ATreverse | ATunderline | ATbold);
+			term.c.attr.fg = DefaultFG;
+			term.c.attr.bg = DefaultBG;
+			break;
+		case 1:
+			term.c.attr.mode |= ATbold;	 
+			break;
+		case 4: 
+			term.c.attr.mode |= ATunderline;
+			break;
+		case 7: 
+			term.c.attr.mode |= ATreverse;	
+			break;
+		case 8:
+			term.c.hidden = CShide;
+			break;
+		case 22: 
+			term.c.attr.mode &= ~ATbold;  
+			break;
+		case 24: 
+			term.c.attr.mode &= ~ATunderline;
+			break;
+		case 27: 
+			term.c.attr.mode &= ~ATreverse;	 
+			break;
+		case 39:
+			term.c.attr.fg = DefaultFG;
+			break;
+		case 49:
+			term.c.attr.fg = DefaultBG;
+			break;
+		default:
+			if(BETWEEN(attr[i], 30, 37))
+				term.c.attr.fg = attr[i] - 30;
+			else if(BETWEEN(attr[i], 40, 47))
+				term.c.attr.bg = attr[i] - 40;
+			break;
 		}
+	}
 }
 
 void
@@ -589,144 +591,163 @@ tsetscroll(int t, int b) {
 	term.bot = b;	 
 }
 
-
 void
-eschandle(void) { 
-	/* escdump(); */
-	switch(escseq.pre) {
-	case '[':
-		switch(escseq.mode) {
-		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);
+csihandle(void) {
+	if(escseq.priv)
+		csidump();
+	switch(escseq.mode) {
+	unknown:
+	default:
+		fprintf(stderr, "erresc: unknown sequence\n");
+		csidump();
+		/* die(""); */
+		break;
+	case '@': /* Insert <n> blank char */
+		DEFAULT(escseq.arg[0], 1);
+		tinsertblank(escseq.arg[0]);
+		break;
+	case 'A': /* Cursor <n> Up */
+	case 'e':
+		DEFAULT(escseq.arg[0], 1);
+		tmoveto(term.c.x, term.c.y-escseq.arg[0]);
+		break;
+	case 'B': /* Cursor <n> Down */
+		DEFAULT(escseq.arg[0], 1);
+		tmoveto(term.c.x, term.c.y+escseq.arg[0]);
+		break;
+	case 'C': /* Cursor <n> Forward */
+	case 'a':
+		DEFAULT(escseq.arg[0], 1);
+		tmoveto(term.c.x+escseq.arg[0], term.c.y);
+		break;
+	case 'D': /* Cursor <n> Backward */
+		DEFAULT(escseq.arg[0], 1);
+		tmoveto(term.c.x-escseq.arg[0], term.c.y);
+		break;
+	case 'E': /* Cursor <n> Down and first col */
+		DEFAULT(escseq.arg[0], 1);
+		tmoveto(0, term.c.y+escseq.arg[0]);
+		break;
+	case 'F': /* Cursor <n> Up and first col */
+		DEFAULT(escseq.arg[0], 1);
+		tmoveto(0, term.c.y-escseq.arg[0]);
+		break;
+	case 'G': /* Move to <col> */
+	case '`':
+		DEFAULT(escseq.arg[0], 1);
+     	tmoveto(escseq.arg[0]-1, term.c.y);
+		break;
+	case 'H': /* Move to <row> <col> */
+	case 'f':
+		DEFAULT(escseq.arg[0], 1);
+		DEFAULT(escseq.arg[1], 1);
+		tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
+		break;
+	case 'J': /* Clear screen */
+		switch(escseq.arg[0]) {
+		case 0: /* below */
+			tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
 			break;
-		case 'E': /* Cursor <n> Down and first col */
-			DEFAULT(escseq.arg[0], 1);
-			tmoveto(0, term.c.y+escseq.arg[0]);
+		case 1: /* above */
+			tclearregion(0, 0, term.c.x, term.c.y);
 			break;
-		case 'F': /* Cursor <n> Up and first col */
-			DEFAULT(escseq.arg[0], 1);
-			tmoveto(0, term.c.y-escseq.arg[0]);
+		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 'G': /* Move to <col> */
-		case '`':
-			DEFAULT(escseq.arg[0], 1);
-			tmoveto(escseq.arg[0]-1, term.c.y);
+		case 1: /* left */
+			tclearregion(0, term.c.y, term.c.x, 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);
+		case 2: /* all */
+			tclearregion(0, term.c.y, term.col-1, term.c.y);
 			break;
-		case 'J': /* Clear screen */
+		}
+		break;
+	case 'S':
+	case 'L': /* Insert <n> blank lines */
+		DEFAULT(escseq.arg[0], 1);
+		tinsertblankline(escseq.arg[0]);
+		break;
+	case 'l':
+		if(escseq.priv) {
 			switch(escseq.arg[0]) {
-			case 0: /* below */
-				tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
+			case 7:
+				term.mode &= ~TMwrap;
 				break;
-			case 1: /* above */
-				tclearregion(0, 0, term.c.x, term.c.y);
+			case 25:
+				term.c.hidden = 1;
 				break;
-			case 2: /* all */
-				tclearregion(0, 0, term.col-1, term.row-1);
-				break;				  
 			}
-			break;
-		case 'K': /* Clear line */
+		}
+		break;
+	case 'M': /* Delete <n> lines */
+		DEFAULT(escseq.arg[0], 1);
+		tdeleteline(escseq.arg[0]);
+		break;
+	case 'X':
+	case 'P': /* Delete <n> char */
+		DEFAULT(escseq.arg[0], 1);
+		tdeletechar(escseq.arg[0]);
+		break;
+	case 'd': /* Move to <row> */
+		DEFAULT(escseq.arg[0], 1);
+		tmoveto(term.c.x, escseq.arg[0]-1);
+		break;
+	case 'h': /* Set terminal mode */
+		if(escseq.priv)
 			switch(escseq.arg[0]) {
-			case 0: /* right */
-				tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+			case 7:
+				term.mode |= TMwrap;
 				break;
-			case 1: /* left */
-				tclearregion(0, term.c.y, term.c.x, term.c.y);
+			case 25:
+				term.c.hidden = 0;
 				break;
-			case 2: /* all */
-				tclearregion(0, term.c.y, term.col-1, term.c.y);
+			case 1034:
+				/* XXX: Interpret "meta" key, sets eighth bit. */
 				break;
 			}
-			break;
-		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': /* Terminal attribute (color) */
+		tsetattr(escseq.arg, escseq.narg);
+		break;
+	case 'r':
+		if(escseq.priv)
+			goto unknown;
+		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;
-	puts("------");
-	printf("rawbuf	: %s\n", escseq.buf);
-	printf("prechar : %c\n", escseq.pre);
-	printf("private : %c\n", escseq.priv ? '?' : ' ');
-	printf("narg	: %d\n", escseq.narg);
-	if(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));
 }
 
@@ -743,21 +764,69 @@ tputtab(void) {
 
 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 if(term.esc & ESCcharset) {
+			printf("ESC ( %c\n", c);
+			switch(c) {
+			case '0': /* Line drawing crap */
+				term.c.attr.mode |= ATgfx;
+				break;
+			case 'B': /* Back to regular text */
+				term.c.attr.mode &= ~ATgfx;
+				break;
+			}
+			term.esc = 0;
+		} else {		
+			switch(c) {
+			case '[':
+				term.esc |= ESCcsi;
+				break;
+			case ']':
+				term.esc |= ESCosc;
+				break;
+			case '(':
+				term.esc |= ESCcharset;
+				break;
+			case 'A':
+				tmoveto(term.c.x, term.c.y-1);
+				break;
+			case 'B':
+				tmoveto(term.c.x, term.c.y+1);
+				break;
+			case 'C':
+				tmoveto(term.c.x+1, term.c.y);
+				break;
+			case 'D':
+				tmoveto(term.c.x-1, term.c.y);
+				break;
+			default:
+				fprintf(stderr, "erresc: unknown sequence ESC %02X '%c'\n", c, isprint(c)?c:'.');
+			}
+		}
+	} else {
+		switch(c) {
 		case '\t':
 			tputtab();
 			break;
@@ -773,6 +842,15 @@ tputc(char c) {
 		case '\a':
 			xbell();
 			break;
+		case '\033':
+			csireset();
+			term.esc = ESCin;
+			break;
+		default:
+			tsetchar(c);
+			tcursor(CSright);
+			break;
+		}
 	}
 }
 
@@ -783,24 +861,6 @@ tputs(char *s, int len) {
 }
 
 void
-tdump(void) {
-	int row, col;
-	Glyph c;
-
-	for(row = 0; row < term.row; row++) {
-		for(col = 0; col < term.col; col++) {
-			if(col == term.c.x && row == term.c.y)
-				putchar('#');
-			else {
-				c = term.line[row][col];
-				putchar(c.state & CRset ? c.c : '.');
-			}
-		}
-		putchar('\n');
-	}
-}
-
-void
 tresize(int col, int row) {
 	int i;
 	Line *line;
@@ -843,7 +903,6 @@ xgetcol(const char *s) {
 	return color.pixel;
 }
 
-
 void
 xclear(int x1, int y1, int x2, int y2) {
 	XClearArea(xw.dis, xw.win, 
@@ -852,7 +911,6 @@ xclear(int x1, int y1, int x2, int y2) {
 			False);
 }
 
-
 void
 xscroll(void) {
 	int srcy = (term.top+1) * xw.ch;
@@ -864,9 +922,6 @@ xscroll(void) {
 	xclear(0, term.bot, term.col-1, term.bot);
 }
 
-
-
-
 void
 xinit(void) {
 	XGCValues values;
@@ -922,6 +977,32 @@ xinit(void) {
 }
 
 void
+xdraws (char *s, Glyph base, int x, int y, int len) {
+	unsigned long xfg, xbg;
+	int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
+	int i;
+
+	if(base.mode & ATreverse)
+		xfg = dc.col[base.bg], xbg = dc.col[base.fg];
+	else
+		xfg = dc.col[base.fg], xbg = dc.col[base.bg];
+
+	XSetBackground(xw.dis, dc.gc, xbg);
+	XSetForeground(xw.dis, dc.gc, xfg);
+	
+	if(base.mode & ATgfx) {
+	   
+		for(i = 0; i < len; i++)
+			s[i] = gfx[s[i]];
+	}
+	
+	XDrawImageString(xw.dis, xw.win, dc.gc, winx, winy, s, len);
+	
+	if(base.mode & ATunderline)
+		XDrawLine(xw.dis, xw.win, dc.gc, winx, winy+1, winx+width-1, winy+1);
+}
+
+void
 xdrawc(int x, int y, Glyph g) {
 	XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
 	unsigned long xfg, xbg;
@@ -932,18 +1013,9 @@ xdrawc(int x, int y, Glyph g) {
 	else
 		xfg = dc.col[g.fg], xbg = dc.col[g.bg];
 	/* background */
-	XSetForeground(xw.dis, dc.gc, xbg);
-	XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
-	/* string */
+	XSetBackground(xw.dis, dc.gc, xbg);
 	XSetForeground(xw.dis, dc.gc, xfg);
-	XDrawString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &(g.c), 1);
-	if(g.mode & ATbold)	 /* XXX: bold hack (draw again at x+1) */
-		XDrawString(xw.dis, xw.win, dc.gc, r.x+1, r.y+dc.font->ascent, &(g.c), 1);
-	/* underline */
-	if(g.mode & ATunderline) {
-		r.y += dc.font->ascent + 1;
-		XDrawLine(xw.dis, xw.win, dc.gc, r.x, r.y, r.x+r.width-1, r.y);
-	}
+	XDrawImageString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
 }
 
 void
@@ -960,33 +1032,45 @@ xcursor(int mode) {
 	/* remove the old cursor */
 	if(term.line[oldy][oldx].state & CRset)
 		xdrawc(oldx, oldy, term.line[oldy][oldx]);
-	else xclear(oldx, oldy, oldx, oldy); /* XXX: maybe a bug */
-	if(mode == CSdraw && !term.c.hidden) {
+	else 
+		xclear(oldx, oldy, oldx, oldy);
+	/* draw the new one */
+	if(mode == CSdraw) {
 		xdrawc(term.c.x, term.c.y, g);
 		oldx = term.c.x, oldy = term.c.y;
 	}
 }
 
-
 void
 draw(int redraw_all) {
-	int x, y;
-	int changed, set;
-
-	if(redraw_all)
-		XClearWindow(xw.dis, xw.win);
-	/* XXX: drawing could be optimised */
+	int i, x, y, ox;
+	Glyph base, new;
+	char buf[MAXDRAWBUF];
+	
 	for(y = 0; y < term.row; y++) {
+		base = term.line[y][0];
+		i = ox = 0;
 		for(x = 0; x < term.col; x++) {
-			changed = term.line[y][x].state & CRupdate;
-			set = term.line[y][x].state & CRset;
-			if((changed && set) || (redraw_all && set)) {
-				term.line[y][x].state &= ~CRupdate;
-				xdrawc(x, y, term.line[y][x]);
+			new = term.line[y][x];
+			if(!ATTRCMP(base, new) && i < MAXDRAWBUF)
+				buf[i++] = new.c;
+			else {
+				xdraws(buf, base, ox, y, i);
+				buf[0] = new.c;
+				i = 1;
+				ox = x;
+				base = new;
 			}
 		}
+		xdraws(buf, base, ox, y, i);
 	}
-	xcursor(CSdraw);
+	if(!term.c.hidden)
+		xcursor(CSdraw);
+}
+
+void
+expose(XEvent *ev) {
+	draw(SCredraw);
 }
 
 char*
@@ -999,19 +1083,21 @@ kmap(KeySym k) {
 }
 
 void
-kpress(XKeyEvent *e) {
+kpress(XEvent *ev) {
+	XKeyEvent *e = &ev->xkey;
 	KeySym ksym;
 	char buf[32];
+	char *customkey;
 	int len;
 	int meta;
 	int shift;
-	char* skmap;
 
 	meta  = e->state & Mod1Mask;
 	shift = e->state & ShiftMask;
 	len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
-	if(skmap = kmap(ksym))
-		ttywrite(skmap, strlen(skmap));
+
+	if(customkey = kmap(ksym))
+		ttywrite(customkey, strlen(customkey));
 	else if(len > 0) {
 		buf[sizeof(buf)-1] = '\0';
 		if(meta && len == 1)
@@ -1046,7 +1132,6 @@ resize(XEvent *e) {
 
 void
 run(void) {
-	int ret;
 	XEvent ev;
 	fd_set rfd;
 	int xfd = XConnectionNumber(xw.dis);
@@ -1054,39 +1139,25 @@ run(void) {
 	running = 1;
 	XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
 	XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* fix resize bug in wmii (?) */
-	
+
 	while(running) {
 		FD_ZERO(&rfd);
 		FD_SET(cmdfd, &rfd);
 		FD_SET(xfd, &rfd);
-		XFlush(xw.dis);
-		ret = select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL);
-
-		if(ret < 0)
+		if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
+			if(errno == EINTR)
+				continue;
 			die("select failed: %s\n", SERRNO);
-				
-		if(FD_ISSET(xfd, &rfd)) {
-			while(XPending(xw.dis)) {
-				XNextEvent(xw.dis, &ev);
-				switch (ev.type) {
-				default:
-					break;
-				case KeyPress:
-					kpress(&ev.xkey);
-					break;
-				case Expose:
-					draw(SCredraw);
-					break;
-				case ConfigureNotify:
-					resize(&ev);
-					break;
-				}
-			}
 		}
 		if(FD_ISSET(cmdfd, &rfd)) {
 			ttyread();
 			draw(SCupdate);
 		}
+		while(XPending(xw.dis)) {
+			XNextEvent(xw.dis, &ev);
+			if(handler[ev.type])
+				(handler[ev.type])(&ev);
+		}
 	}
 }