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use xclear() in draw().
[st.git] / st.c
diff --git a/st.c b/st.c
index 559dcda..d2f8c2e 100644 (file)
--- a/st.c
+++ b/st.c
@@ -3,6 +3,7 @@
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <limits.h>
 #include <locale.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <locale.h>
 #include <stdarg.h>
 #include <stdio.h>
@@ -19,11 +20,23 @@
 #include <X11/keysym.h>
 #include <X11/Xutil.h>
 
 #include <X11/keysym.h>
 #include <X11/Xutil.h>
 
-#define TNAME "st"
+#if   defined(__linux)
+ #include <pty.h>
+#elif defined(__OpenBSD__) || defined(__NetBSD__)
+ #include <util.h>
+#elif defined(__FreeBSD__) || defined(__DragonFly__)
+ #include <libutil.h>
+#endif
+
+#define USAGE \
+       "st-" VERSION ", (c) 2010 st engineers\n" \
+       "usage: st [-t title] [-e cmd] [-v]\n"
 
 /* Arbitrary sizes */
 
 /* Arbitrary sizes */
-#define ESCSIZ 256
-#define ESCARG 16
+#define ESC_TITLE_SIZ 256
+#define ESC_BUF_SIZ   256
+#define ESC_ARG_SIZ   16
+#define DRAW_BUF_SIZ  1024
 
 #define SERRNO strerror(errno)
 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
 
 #define SERRNO strerror(errno)
 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
@@ -32,143 +45,284 @@
 #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 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)
+#define IS_SET(flag) (term.mode & (flag))
 
 /* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
 
 /* 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 };
-enum { SCupdate, SCredraw };
-
-typedef int Color;
-
-typedef struct {
-       KeySym k;
-       char s[ESCSIZ];
-} Key;
+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 };
+enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
+enum { SCREEN_UPDATE, SCREEN_REDRAW };
 
 typedef struct {
        char c;     /* character code  */
        char mode;  /* attribute flags */
 
 typedef struct {
        char c;     /* character code  */
        char mode;  /* attribute flags */
-       Color fg;   /* foreground      */
-       Color bg;   /* background      */
-       char state; /* state flag      */
+       int fg;     /* foreground      */
+       int bg;     /* background      */
+       char state; /* state flags     */
 } Glyph;
 
 typedef Glyph* Line;
 
 typedef struct {
 } Glyph;
 
 typedef Glyph* Line;
 
 typedef struct {
-       Glyph attr;  /* current char attributes */
-       char hidden;
+       Glyph attr;      /* current char attributes */
        int x;
        int y;
        int x;
        int y;
+       char state;
 } TCursor;
 
 } TCursor;
 
-/* Escape sequence structs */
-/* ESC <pre> [[ [<priv>] <arg> [;]] <mode>] */
+/* CSI Escape sequence structs */
+/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
 typedef struct {
 typedef struct {
-       char buf[ESCSIZ+1]; /* raw string */
-       int len;            /* raw string length */
-       char pre;           
+       char buf[ESC_BUF_SIZ]; /* raw string */
+       int len;                           /* raw string length */
        char priv;
        char priv;
-       int arg[ESCARG+1];
-       int narg;           /* nb of args */
+       int arg[ESC_ARG_SIZ];
+       int narg;                          /* nb of args */
        char mode;
        char mode;
-} Escseq;
+} CSIEscape;
 
 /* Internal representation of the screen */
 typedef struct {
 
 /* Internal representation of the screen */
 typedef struct {
-       int row;    /* nb row */  
-       int col;    /* nb col */
-       Line* line; /* screen */
-       TCursor c;  /* cursor */
-       int top;    /* top    scroll limit */
-       int bot;    /* bottom scroll limit */
-       int mode;   /* terminal mode */
+       int row;        /* nb row */  
+       int col;        /* nb col */
+       Line* line;     /* screen */
+       Line* alt;      /* alternate screen */
+       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;
 } Term;
 
 /* Purely graphic info */
 typedef struct {
        Display* dis;
 } Term;
 
 /* Purely graphic info */
 typedef struct {
        Display* dis;
+       Colormap cmap;
        Window win;
        Window win;
+       Pixmap buf;
        int scr;
        int scr;
-       int w;  /* window width  */
-       int h;  /* window height */
+       int w;  /* window width  */
+       int h;  /* window height */
+       int bufw; /* pixmap width  */
+       int bufh; /* pixmap height */
        int ch; /* char height */
        int cw; /* char width  */
        int ch; /* char height */
        int cw; /* char width  */
+       int hasfocus;
 } XWindow; 
 
 } XWindow; 
 
-#include "config.h"
+typedef struct {
+       KeySym k;
+       char s[ESC_BUF_SIZ];
+} Key;
 
 /* Drawing Context */
 typedef struct {
 
 /* Drawing Context */
 typedef struct {
-       unsigned long col[LEN(colorname)];
+       unsigned long col[256];
        XFontStruct* font;
        XFontStruct* font;
+       XFontStruct* bfont;
        GC gc;
 } DC;
 
        GC gc;
 } DC;
 
+/* TODO: use better name for vars... */
+typedef struct {
+       int mode;
+       int bx, by;
+       int ex, ey;
+       struct {int x, y;}  b, e;
+       char *clip;
+} Selection;
+
+#include "config.h"
+
 static void die(const char *errstr, ...);
 static void draw(int);
 static void execsh(void);
 static void sigchld(int);
 static void run(void);
 
 static void die(const char *errstr, ...);
 static void draw(int);
 static void execsh(void);
 static void sigchld(int);
 static void run(void);
 
-static int escaddc(char);
-static int escfinal(char);
-static void escdump(void);
-static void eschandle(void);
-static void escparse(void);
-static void escreset(void);
+static void csidump(void);
+static void csihandle(void);
+static void csiparse(void);
+static void csireset(void);
 
 static void tclearregion(int, int, int, int);
 
 static void tclearregion(int, int, int, int);
-static void tcpos(int);
 static void tcursor(int);
 static void tdeletechar(int);
 static void tdeleteline(int);
 static void tcursor(int);
 static void tdeletechar(int);
 static void tdeleteline(int);
-static void tdump(void);
 static void tinsertblank(int);
 static void tinsertblankline(int);
 static void tmoveto(int, int);
 static void tnew(int, int);
 static void tnewline(void);
 static void tinsertblank(int);
 static void tinsertblankline(int);
 static void tmoveto(int, int);
 static void tnew(int, int);
 static void tnewline(void);
+static void tputtab(void);
 static void tputc(char);
 static void tputs(char*, int);
 static void tputc(char);
 static void tputs(char*, int);
+static void treset(void);
 static void tresize(int, int);
 static void tresize(int, int);
-static void tscroll(void);
+static void tscrollup(int, int);
+static void tscrolldown(int, int);
 static void tsetattr(int*, int);
 static void tsetchar(char);
 static void tsetscroll(int, int);
 static void tsetattr(int*, int);
 static void tsetchar(char);
 static void tsetscroll(int, int);
+static void tswapscreen(void);
 
 static void ttynew(void);
 static void ttyread(void);
 static void ttyresize(int, int);
 static void ttywrite(const char *, size_t);
 
 
 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 xdraws(char *, Glyph, int, int, int);
+static void xhints(void);
 static void xclear(int, int, int, int);
 static void xclear(int, int, int, int);
-static void xcursor(int);
-static void xdrawc(int, int, Glyph);
+static void xdrawcursor(void);
 static void xinit(void);
 static void xinit(void);
-static void xscroll(void);
+static void xloadcols(void);
+static void xseturgency(int);
 
 static void expose(XEvent *);
 
 static void expose(XEvent *);
+static char* kmap(KeySym);
 static void kpress(XEvent *);
 static void resize(XEvent *);
 static void kpress(XEvent *);
 static void resize(XEvent *);
+static void focus(XEvent *);
+static void brelease(XEvent *);
+static void bpress(XEvent *);
+static void bmotion(XEvent *);
+
 
 static void (*handler[LASTEvent])(XEvent *) = {
        [KeyPress] = kpress,
        [Expose] = expose,
 
 static void (*handler[LASTEvent])(XEvent *) = {
        [KeyPress] = kpress,
        [Expose] = expose,
-       [ConfigureNotify] = resize
+       [ConfigureNotify] = resize,
+       [FocusIn] = focus,
+       [FocusOut] = focus,
+       [MotionNotify] = bmotion,
+       [ButtonPress] = bpress,
+       [ButtonRelease] = brelease,
 };
 
 /* Globals */
 static DC dc;
 static XWindow xw;
 static Term term;
 };
 
 /* Globals */
 static DC dc;
 static XWindow xw;
 static Term term;
-static Escseq escseq;
+static CSIEscape escseq;
 static int cmdfd;
 static pid_t pid;
 static int cmdfd;
 static pid_t pid;
-static int running;
+static Selection sel;
+static char *opt_cmd   = NULL;
+static char *opt_title = NULL;
+
+void
+selinit(void) {
+       sel.mode = 0;
+       sel.bx = -1;
+       sel.clip = NULL;
+}
+
+static inline int selected(int x, int y) {
+       if(sel.ey == y && sel.by == y) {
+               int bx = MIN(sel.bx, sel.ex);
+               int ex = MAX(sel.bx, sel.ex);
+               return BETWEEN(x, bx, ex);
+       }
+       return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x)) 
+               || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
+}
+
+static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
+       if(b) *b = e->xbutton.state,
+               *b=*b==4096?5:*b==2048?4:*b==1024?3:*b==512?2:*b==256?1:-1;
+       *x = e->xbutton.x/xw.cw;
+       *y = e->xbutton.y/xw.ch;
+       sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
+       sel.b.y = MIN(sel.by, sel.ey);
+       sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
+       sel.e.y = MAX(sel.by, sel.ey);
+}
+
+static void bpress(XEvent *e) {
+       sel.mode = 1;
+       sel.ex = sel.bx = e->xbutton.x/xw.cw;
+       sel.ey = sel.by = e->xbutton.y/xw.ch;
+}
+
+static char *getseltext() {
+       char *str, *ptr;
+       int ls, x, y, sz;
+       if(sel.bx == -1)
+               return NULL;
+       sz = (term.col+1) * (sel.e.y-sel.b.y+1);
+       ptr = str = malloc(sz);
+       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)))
+                               *ptr = term.line[y][x].c, ptr++;
+               if(ls)
+                       *ptr = '\n', ptr++;
+       }
+       *ptr = 0;
+       return str;
+}
+
+/* TODO: use X11 clipboard */
+static void selcopy(char *str) {
+       free(sel.clip);
+       sel.clip = str;
+}
+
+static void selpaste() {
+       if(sel.clip)
+               ttywrite(sel.clip, strlen(sel.clip));
+}
+
+/* TODO: doubleclick to select word */
+static void brelease(XEvent *e) {
+       int b;
+       sel.mode = 0;
+       getbuttoninfo(e, &b, &sel.ex, &sel.ey);
+       if(sel.bx==sel.ex && sel.by==sel.ey) {
+               sel.bx = -1;
+               if(b==2)
+                       selpaste();
+       } else {
+               if(b==1)
+                       selcopy(getseltext());
+       }
+       draw(1);
+}
+
+static void bmotion(XEvent *e) {
+       if (sel.mode) {
+               getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
+               draw(1);
+       }
+}
+
+#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 & GLYPH_SET ? c.c : '.');
+                       }
+               }
+               putchar('\n');
+       }
+}
+#endif
 
 void
 die(const char *errstr, ...) {
 
 void
 die(const char *errstr, ...) {
@@ -182,18 +336,13 @@ die(const char *errstr, ...) {
 
 void
 execsh(void) {
 
 void
 execsh(void) {
-       char *args[3] = {SHELL, "-i", NULL};
-       putenv("TERM=" TNAME);
-       execvp(SHELL, args);
-}
-
-void
-xbell(void) { /* visual bell */
-       XRectangle r = { 0, 0, xw.w, xw.h };
-       XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
-       XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
-       /* usleep(30000); */
-       draw(SCredraw);
+       char *args[] = {getenv("SHELL"), "-i", NULL};
+       if(opt_cmd)
+               args[0] = opt_cmd, args[1] = NULL;
+       else
+               DEFAULT(args[0], SHELL);
+       putenv("TERM="TNAME);
+       execvp(args[0], args);
 }
 
 void 
 }
 
 void 
@@ -210,19 +359,12 @@ sigchld(int a) {
 void
 ttynew(void) {
        int m, s;
 void
 ttynew(void) {
        int m, s;
-       char *pts;
-
-       if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
-               die("openpt failed: %s\n", SERRNO);
-       if(grantpt(m) < 0)
-               die("grandpt failed: %s\n", SERRNO);
-       if(unlockpt(m) < 0)
-               die("unlockpt failed: %s\n", SERRNO);
-       if(!(pts = ptsname(m)))
-               die("ptsname failed: %s\n", SERRNO);
-       if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
-               die("Couldn't open slave: %s\n", SERRNO);
-       fcntl(s, F_SETFL, O_NDELAY);
+       
+       /* 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)
+               die("openpty failed: %s\n", SERRNO);
+
        switch(pid = fork()) {
        case -1:
                die("fork failed\n");
        switch(pid = fork()) {
        case -1:
                die("fork failed\n");
@@ -233,7 +375,9 @@ ttynew(void) {
                dup2(s, STDOUT_FILENO);
                dup2(s, STDERR_FILENO);
                if(ioctl(s, TIOCSCTTY, NULL) < 0)
                dup2(s, STDOUT_FILENO);
                dup2(s, STDERR_FILENO);
                if(ioctl(s, TIOCSCTTY, NULL) < 0)
-                       die("ioctl TTIOCSTTY failed: %s\n", SERRNO);
+                       die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
+               close(s);
+               close(m);
                execsh();
                break;
        default:
                execsh();
                break;
        default:
@@ -246,23 +390,20 @@ ttynew(void) {
 void
 dump(char c) {
        static int col;
 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");
 }
 
 void
 ttyread(void) {
        if(++col % 10 == 0)
                fprintf(stderr, "\n");
 }
 
 void
 ttyread(void) {
-       char buf[BUFSIZ] = {0};
+       char buf[BUFSIZ];
        int ret;
 
        int ret;
 
-       switch(ret = read(cmdfd, buf, BUFSIZ)) {
-       case -1: 
+       if((ret = read(cmdfd, buf, LEN(buf))) < 0)
                die("Couldn't read from shell: %s\n", SERRNO);
                die("Couldn't read from shell: %s\n", SERRNO);
-               break;
-       default:
+       else
                tputs(buf, ret);
                tputs(buf, ret);
-       }
 }
 
 void
 }
 
 void
@@ -282,173 +423,148 @@ ttyresize(int x, int y) {
                fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 }
 
                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
+tcursor(int mode) {
+       static TCursor c;
+
+       if(mode == CURSOR_SAVE)
+               c = term.c;
+       else if(mode == CURSOR_LOAD)
+               term.c = c, tmoveto(c.x, c.y);
 }
 
 void
 }
 
 void
-tcpos(int mode) {
-       static int x = 0;
-       static int y = 0;
-
-       if(mode == CSsave)
-               x = term.c.x, y = term.c.y;
-       else if(mode == CSload)
-               tmoveto(x, y);
+treset(void) {
+       term.c = (TCursor){{
+               .mode = ATTR_NULL, 
+               .fg = DefaultFG, 
+               .bg = DefaultBG
+       }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
+       
+       term.top = 0, term.bot = term.row - 1;
+       term.mode = MODE_WRAP;
+       tclearregion(0, 0, term.col-1, term.row-1);
 }
 
 void
 }
 
 void
-tnew(int col, int row) {   /* screen size */
+tnew(int col, int row) {
+       /* set screen size */
        term.row = row, term.col = col;
        term.row = row, term.col = col;
-       term.top = 0, term.bot = term.row - 1;
-       /* mode */
-       term.mode = TMwrap;
-       /* cursor */
-       term.c.attr.mode = ATnone;
-       term.c.attr.fg = DefaultFG;
-       term.c.attr.bg = DefaultBG;
-       term.c.x = term.c.y = 0;
-       term.c.hidden = 0;
-       /* allocate screen */
-       term.line = calloc(term.row, sizeof(Line));
-       for(row = 0 ; row < term.row; row++)
-               term.line[row] = calloc(term.col, sizeof(Glyph));
+       term.line = malloc(term.row * sizeof(Line));
+       term.alt  = malloc(term.row * sizeof(Line));
+       for(row = 0 ; row < term.row; row++) {
+               term.line[row] = malloc(term.col * sizeof(Glyph));
+               term.alt [row] = malloc(term.col * sizeof(Glyph));
+       }
+       /* setup screen */
+       treset();
 }
 
 void
 }
 
 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;
+tswapscreen(void) {
+       Line* tmp = term.line;
+       term.line = term.alt;
+       term.alt = tmp;
+       term.mode ^= MODE_ALTSCREEN;
 }
 
 void
 }
 
 void
-tnewline(void) {
-       int y = term.c.y + 1;
-       if(y > term.bot)
-               tscroll(), y = term.bot;
-       tmoveto(0, y);
-}
+tscrolldown(int orig, int n) {
+       int i;
+       Line temp;
+       
+       LIMIT(n, 0, term.bot-orig+1);
 
 
-int
-escaddc(char c) {
-       escseq.buf[escseq.len++] = c;
-       if(escfinal(c) || escseq.len >= ESCSIZ) {
-               escparse(), eschandle();
-               return 0;
+       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;
        }
        }
-       return 1;
 }
 
 void
 }
 
 void
-escparse(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;
-                       }
-               }
-               break;
-       case '(':
-               /* XXX: graphic character set */
-               break;
+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]; 
+                term.line[i+n] = temp;
        }
 }
 
 void
        }
 }
 
 void
-tmoveto(int x, int y) {
-       term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
-       term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
+tnewline(void) {
+       int y = term.c.y;
+       if(term.c.y == term.bot)
+               tscrollup(term.top, 1);
+       else
+               y++;
+       tmoveto(0, y);
 }
 
 void
 }
 
 void
-tcursor(int dir) {
-       int xf = term.c.x, yf = term.c.y;
+csiparse(void) {
+       /* int noarg = 1; */
+       char *p = escseq.buf;
 
 
-       switch(dir) {
-       case CSup:
-               yf--;
-               break;
-       case CSdown:
-               yf++;
-               break;
-       case CSleft:
-               xf--;
-               if(xf < 0) {
-                       xf = term.col-1, yf--;
-                       if(yf < term.top)
-                               yf = term.top, xf = 0;
+       escseq.narg = 0;
+       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 */;
                }
                }
-               break;
-       case CSright:
-               xf++;
-               if(xf >= term.col) {
-                       xf = 0, yf++;
-                       if(yf > term.bot)
-                               yf = term.bot, tscroll();
+               if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
+                       escseq.narg++, p++;
+               else {
+                       escseq.mode = *p;
+                       escseq.narg++;
+                       return;
                }
                }
-               break;
        }
        }
-       tmoveto(xf, yf);
+}
+
+void
+tmoveto(int x, int y) {
+       LIMIT(x, 0, term.col-1);
+       LIMIT(y, 0, term.row-1);
+       term.c.state &= ~CURSOR_WRAPNEXT;
+       term.c.x = x;
+       term.c.y = y;
 }
 
 void
 tsetchar(char c) {
        term.line[term.c.y][term.c.x] = term.c.attr;
        term.line[term.c.y][term.c.x].c = c;
 }
 
 void
 tsetchar(char c) {
        term.line[term.c.y][term.c.x] = term.c.attr;
        term.line[term.c.y][term.c.x].c = c;
-       term.line[term.c.y][term.c.x].state |= CRset | CRupdate;
+       term.line[term.c.y][term.c.x].state |= GLYPH_SET;
 }
 
 void
 tclearregion(int x1, int y1, int x2, int y2) {
 }
 
 void
 tclearregion(int x1, int y1, int x2, int y2) {
-       int x, y;
+       int y, temp;
+
+       if(x1 > x2)
+               temp = x1, x1 = x2, x2 = temp;
+       if(y1 > y2)
+               temp = y1, y1 = y2, y2 = temp;
 
        LIMIT(x1, 0, term.col-1);
        LIMIT(x2, 0, term.col-1);
        LIMIT(y1, 0, term.row-1);
        LIMIT(y2, 0, term.row-1);
 
 
        LIMIT(x1, 0, term.col-1);
        LIMIT(x2, 0, term.col-1);
        LIMIT(y1, 0, term.row-1);
        LIMIT(y2, 0, term.row-1);
 
-       /* XXX: could be optimized */
-       for(x = x1; x <= x2; x++)
-               for(y = y1; y <= y2; y++)
-                       memset(&term.line[y][x], 0, sizeof(Glyph));
-
-       xclear(x1, y1, x2, y2);
+       for(y = y1; y <= y2; y++)
+               memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
 }
 
 void
 }
 
 void
@@ -462,80 +578,37 @@ tdeletechar(int n) {
                return;
        }
        memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
                return;
        }
        memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
-       tclearregion(term.col-size, term.c.y, term.col-1, term.c.y);
+       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;
 }
 
 void
 tinsertblank(int n) {
        int src = term.c.x;
        int dst = src + n;
-       int size = term.col - n - src;
+       int size = term.col - dst;
 
        if(dst >= term.col) {
                tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
                return;
        }
        memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
 
        if(dst >= term.col) {
                tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
                return;
        }
        memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
-       tclearregion(src, term.c.y, dst, term.c.y);
+       tclearregion(src, term.c.y, dst - 1, term.c.y);
 }
 
 void
 }
 
 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;
-       int bot = term.bot;
-
-       if(term.c.y > term.bot)
-               bot = term.row - 1;
-       else if(term.c.y < term.top)
-               bot = term.top - 1;
-       if(term.c.y + n >= bot) {
-               tclearregion(0, term.c.y, term.col-1, bot);
+tinsertblankline(int n) {
+       if(term.c.y < term.top || term.c.y > term.bot)
                return;
                return;
-       }
-       for(i = bot; i >= term.c.y+n; i--) {
-               /* swap deleted line <-> blanked line */
-               blank = term.line[i];
-               term.line[i] = term.line[i-n];
-               term.line[i-n] = blank;
-               /* blank it */
-               memset(blank, 0, term.col * sizeof(Glyph));
-               tsetlinestate(i, CRupdate);
-               tsetlinestate(i-n, CRupdate);
-       }
+
+       tscrolldown(term.c.y, n);
 }
 
 void
 tdeleteline(int n) {
 }
 
 void
 tdeleteline(int n) {
-       int i;
-       Line blank;
-       int bot = term.bot;
-
-       if(term.c.y > term.bot)
-               bot = term.row - 1;
-       else if(term.c.y < term.top)
-               bot = term.top - 1;
-       if(term.c.y + n >= bot) {
-               tclearregion(0, term.c.y, term.col-1, bot);
+       if(term.c.y < term.top || term.c.y > term.bot)
                return;
                return;
-       }
-       for(i = term.c.y; i <= bot-n; i++) {
-               /* swap deleted line <-> blanked line */
-               blank = term.line[i];
-               term.line[i] = term.line[i+n];
-               term.line[i+n] = blank;
-               /* blank it */
-               memset(blank, 0, term.col * sizeof(Glyph));
-               tsetlinestate(i, CRupdate);
-               tsetlinestate(i-n, CRupdate);
-       }
+
+       tscrollup(term.c.y, n);
 }
 
 void
 }
 
 void
@@ -545,42 +618,68 @@ tsetattr(int *attr, int l) {
        for(i = 0; i < l; i++) {
                switch(attr[i]) {
                case 0:
        for(i = 0; i < l; i++) {
                switch(attr[i]) {
                case 0:
-                       memset(&term.c.attr, 0, sizeof(term.c.attr));
+                       term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
                        term.c.attr.fg = DefaultFG;
                        term.c.attr.bg = DefaultBG;
                        break;
                case 1:
                        term.c.attr.fg = DefaultFG;
                        term.c.attr.bg = DefaultBG;
                        break;
                case 1:
-                       term.c.attr.mode |= ATbold;      
+                       term.c.attr.mode |= ATTR_BOLD;   
                        break;
                case 4: 
                        break;
                case 4: 
-                       term.c.attr.mode |= ATunderline;
+                       term.c.attr.mode |= ATTR_UNDERLINE;
                        break;
                case 7: 
                        break;
                case 7: 
-                       term.c.attr.mode |= ATreverse;  
-                       break;
-               case 8:
-                       term.c.hidden = CShide;
+                       term.c.attr.mode |= ATTR_REVERSE;       
                        break;
                case 22: 
                        break;
                case 22: 
-                       term.c.attr.mode &= ~ATbold;  
+                       term.c.attr.mode &= ~ATTR_BOLD;  
                        break;
                case 24: 
                        break;
                case 24: 
-                       term.c.attr.mode &= ~ATunderline;
+                       term.c.attr.mode &= ~ATTR_UNDERLINE;
                        break;
                case 27: 
                        break;
                case 27: 
-                       term.c.attr.mode &= ~ATreverse;  
+                       term.c.attr.mode &= ~ATTR_REVERSE;       
+                       break;
+               case 38:
+                       if (i + 2 < l && attr[i + 1] == 5) {
+                               i += 2;
+                               if (BETWEEN(attr[i], 0, 255))
+                                       term.c.attr.fg = attr[i];
+                               else
+                                       fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
+                       }
+                       else
+                               fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]); 
                        break;
                case 39:
                        term.c.attr.fg = DefaultFG;
                        break;
                        break;
                case 39:
                        term.c.attr.fg = DefaultFG;
                        break;
+               case 48:
+                       if (i + 2 < l && attr[i + 1] == 5) {
+                               i += 2;
+                               if (BETWEEN(attr[i], 0, 255))
+                                       term.c.attr.bg = attr[i];
+                               else
+                                       fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
+                       }
+                       else
+                               fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]); 
+                       break;
                case 49:
                case 49:
-                       term.c.attr.fg = DefaultBG;
+                       term.c.attr.bg = 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;
                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;
+                       else if(BETWEEN(attr[i], 90, 97))
+                               term.c.attr.fg = attr[i] - 90 + 8;
+                       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();
+                       
                        break;
                }
        }
                        break;
                }
        }
@@ -602,182 +701,335 @@ tsetscroll(int t, int b) {
 }
 
 void
 }
 
 void
-eschandle(void) {
-       switch(escseq.pre) {
+csihandle(void) {
+       switch(escseq.mode) {
        default:
        default:
-               goto unknown_seq;
-       case '[':
-               switch(escseq.mode) {
-               default:
-               unknown_seq:
-                       fprintf(stderr, "erresc: unknown sequence\n");
-                       escdump();
-                       break;
-               case '@': /* Insert <n> blank char */
-                       DEFAULT(escseq.arg[0], 1);
-                       tinsertblank(escseq.arg[0]);
-                       break;
-               case 'A': /* Cursor <n> Up */
-               case 'e':
-                       DEFAULT(escseq.arg[0], 1);
-                       tmoveto(term.c.x, term.c.y-escseq.arg[0]);
-                       break;
-               case 'B': /* Cursor <n> Down */
-                       DEFAULT(escseq.arg[0], 1);
-                       tmoveto(term.c.x, term.c.y+escseq.arg[0]);
-                       break;
-               case 'C': /* Cursor <n> Forward */
-               case 'a':
-                       DEFAULT(escseq.arg[0], 1);
-                       tmoveto(term.c.x+escseq.arg[0], term.c.y);
+       unknown:
+               printf("erresc: unknown csi ");
+               csidump();
+               /* die(""); */
+               break;
+       case '@': /* ICH -- Insert <n> blank char */
+               DEFAULT(escseq.arg[0], 1);
+               tinsertblank(escseq.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]);
+               break;
+       case 'B': /* CUD -- Cursor <n> Down */
+               DEFAULT(escseq.arg[0], 1);
+               tmoveto(term.c.x, term.c.y+escseq.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);
+               break;
+       case 'D': /* CUB -- Cursor <n> Backward */
+               DEFAULT(escseq.arg[0], 1);
+               tmoveto(term.c.x-escseq.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]);
+               break;
+       case 'F': /* CPL -- Cursor <n> Up and first col */
+               DEFAULT(escseq.arg[0], 1);
+               tmoveto(0, term.c.y-escseq.arg[0]);
+               break;
+       case 'G': /* CHA -- Move to <col> */
+       case '`': /* XXX: HPA -- same? */
+               DEFAULT(escseq.arg[0], 1);
+               tmoveto(escseq.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);
+               break;
+       /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
+       case 'J': /* ED -- Clear screen */
+               switch(escseq.arg[0]) {
+               case 0: /* below */
+                       tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
                        break;
                        break;
-               case 'D': /* Cursor <n> Backward */
-                       DEFAULT(escseq.arg[0], 1);
-                       tmoveto(term.c.x-escseq.arg[0], term.c.y);
+               case 1: /* above */
+                       tclearregion(0, 0, term.c.x, term.c.y);
                        break;
                        break;
-               case 'E': /* Cursor <n> Down 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 'F': /* Cursor <n> Up and first col */
-                       DEFAULT(escseq.arg[0], 1);
-                       tmoveto(0, term.c.y-escseq.arg[0]);
+               default:
+                       goto unknown;
+               }
+               break;
+       case 'K': /* EL -- Clear line */
+               switch(escseq.arg[0]) {
+               case 0: /* right */
+                       tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
                        break;
                        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;
                        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;
                        break;
-               case 'J': /* Clear screen */
+               }
+               break;
+       case 'S': /* SU -- Scroll <n> line up */
+               DEFAULT(escseq.arg[0], 1);
+               tscrollup(term.top, escseq.arg[0]);
+               break;
+       case 'T': /* SD -- Scroll <n> line down */
+               DEFAULT(escseq.arg[0], 1);
+               tscrolldown(term.top, escseq.arg[0]);
+               break;
+       case 'L': /* IL -- Insert <n> blank lines */
+               DEFAULT(escseq.arg[0], 1);
+               tinsertblankline(escseq.arg[0]);
+               break;
+       case 'l': /* RM -- Reset Mode */
+               if(escseq.priv) {
                        switch(escseq.arg[0]) {
                        switch(escseq.arg[0]) {
-                       case 0: /* below */
-                               tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
+                       case 1:
+                               term.mode &= ~MODE_APPKEYPAD;
+                               break;
+                       case 5: /* TODO: DECSCNM -- Remove reverse video */
+                               break;
+                       case 7:
+                               term.mode &= ~MODE_WRAP;
+                               break;
+                       case 12: /* att610 -- Stop blinking cursor (IGNORED) */
                                break;
                                break;
-                       case 1: /* above */
-                               tclearregion(0, 0, term.c.x, term.c.y);
+                       case 25:
+                               term.c.state |= CURSOR_HIDE;
                                break;
                                break;
-                       case 2: /* all */
-                               tclearregion(0, 0, term.col-1, term.row-1);
-                               break;                            
+                       case 1049: /* = 1047 and 1048 */
+                       case 1047:
+                               if(IS_SET(MODE_ALTSCREEN)) {
+                                       tclearregion(0, 0, term.col-1, term.row-1);
+                                       tswapscreen();
+                               }
+                               if(escseq.arg[0] == 1047)
+                                       break;
+                       case 1048:
+                               tcursor(CURSOR_LOAD);
+                               break;
+                       default:
+                               goto unknown;
                        }
                        }
-                       break;
-               case 'K': /* Clear line */
+               } else {
                        switch(escseq.arg[0]) {
                        switch(escseq.arg[0]) {
-                       case 0: /* right */
-                               tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+                       case 4:
+                               term.mode &= ~MODE_INSERT;
                                break;
                                break;
-                       case 1: /* left */
-                               tclearregion(0, term.c.y, term.c.x, term.c.y);
+                       default:
+                               goto unknown;
+                       }
+               }
+               break;
+       case 'M': /* DL -- Delete <n> lines */
+               DEFAULT(escseq.arg[0], 1);
+               tdeleteline(escseq.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);
+               break;
+       case 'P': /* DCH -- Delete <n> char */
+               DEFAULT(escseq.arg[0], 1);
+               tdeletechar(escseq.arg[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);
+               break;
+       case 'h': /* SM -- Set terminal mode */
+               if(escseq.priv) {
+                       switch(escseq.arg[0]) {
+                       case 1:
+                               term.mode |= MODE_APPKEYPAD;
                                break;
                                break;
-                       case 2: /* all */
-                               tclearregion(0, term.c.y, term.col-1, term.c.y);
+                       case 5: /* DECSCNM -- Reverve video */
+                               /* TODO: set REVERSE on the whole screen (f) */
                                break;
                                break;
+                       case 7:
+                               term.mode |= MODE_WRAP;
+                               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 1049: /* = 1047 and 1048 */
+                       case 1047:
+                               if(IS_SET(MODE_ALTSCREEN))
+                                       tclearregion(0, 0, term.col-1, term.row-1);
+                               else
+                                       tswapscreen();
+                               if(escseq.arg[0] == 1047)
+                                       break;
+                       case 1048:
+                               tcursor(CURSOR_SAVE);
+                               break;
+                       default: goto unknown;
                        }
                        }
-                       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> */
-                       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);
+               } else {
+                       switch(escseq.arg[0]) {
+                       case 4:
+                               term.mode |= MODE_INSERT;
+                               break;
+                       default: goto unknown;
                        }
                        }
-                       break;
-               case 's': /* Save cursor position */
-                       tcpos(CSsave);
-                       break;
-               case 'u': /* Load cursor position */
-                       tcpos(CSload);
-                       break;
+               };
+               break;
+       case 'm': /* SGR -- Terminal attribute (color) */
+               tsetattr(escseq.arg, escseq.narg);
+               break;
+       case 'r': /* DECSTBM -- Set Scrolling Region */
+               if(escseq.priv)
+                       goto unknown;
+               else {
+                       DEFAULT(escseq.arg[0], 1);
+                       DEFAULT(escseq.arg[1], term.row);
+                       tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
+                       tmoveto(0, 0);
                }
                break;
                }
                break;
+       case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
+               tcursor(CURSOR_SAVE);
+               break;
+       case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
+               tcursor(CURSOR_LOAD);
+               break;
        }
 }
 
 void
        }
 }
 
 void
-escdump(void) { 
+csidump(void) { 
        int i;
        int i;
-       printf("rawbuf  : %s\n", escseq.buf);
-       printf("prechar : %c\n", escseq.pre);
-       printf("private : %c\n", escseq.priv ? '?' : ' ');
-       printf("narg    : %d\n", escseq.narg);
+       printf("ESC [ %s", escseq.priv ? "? " : "");
        if(escseq.narg)
                for(i = 0; i < escseq.narg; i++)
        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
 }
 
 void
-escreset(void) {
+csireset(void) {
        memset(&escseq, 0, sizeof(escseq));
 }
 
 void
 tputtab(void) {
        int space = TAB - term.c.x % TAB;
        memset(&escseq, 0, sizeof(escseq));
 }
 
 void
 tputtab(void) {
        int space = TAB - term.c.x % TAB;
-       
-       if(term.c.x + space >= term.col)
-               space--;
-       
-       for(; space > 0; space--)
-               tcursor(CSright);
+       tmoveto(term.c.x + space, term.c.y);
 }
 
 void
 tputc(char c) {
 }
 
 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 & ESC_START) {
+               if(term.esc & ESC_CSI) {
+                       escseq.buf[escseq.len++] = c;
+                       if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
+                               term.esc = 0;
+                               csiparse(), csihandle();
+                       }
+                       /* TODO: handle other OSC */
+               } else if(term.esc & ESC_OSC) { 
+                       if(c == ';') {
+                               term.titlelen = 0;
+                               term.esc = ESC_START | ESC_TITLE;
+                       }
+               } else if(term.esc & ESC_TITLE) {
+                       if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
+                               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 & ESC_ALTCHARSET) {
+                       switch(c) {
+                       case '0': /* Line drawing crap */
+                               term.c.attr.mode |= ATTR_GFX;
+                               break;
+                       case 'B': /* Back to regular text */
+                               term.c.attr.mode &= ~ATTR_GFX;
+                               break;
+                       default:
+                               printf("esc unhandled charset: ESC ( %c\n", c);
+                       }
+                       term.esc = 0;
+               } else {
+                       switch(c) {
+                       case '[':
+                               term.esc |= ESC_CSI;
+                               break;
+                       case ']':
+                               term.esc |= ESC_OSC;
+                               break;
+                       case '(':
+                               term.esc |= ESC_ALTCHARSET;
+                               break;
+                       case 'D': /* IND -- Linefeed */
+                               if(term.c.y == term.bot)
+                                       tscrollup(term.top, 1);
+                               else
+                                       tmoveto(term.c.x, term.c.y+1);
+                               term.esc = 0;
+                               break;
+                       case 'E': /* NEL -- Next line */
+                               tnewline();
+                               term.esc = 0;
+                               break;
+                       case 'M': /* RI -- Reverse index */
+                               if(term.c.y == term.top)
+                                       tscrolldown(term.top, 1);
+                               else
+                                       tmoveto(term.c.x, term.c.y-1);
+                               term.esc = 0;
+                               break;
+                       case 'c': /* RIS -- Reset to inital state */
+                               treset();
+                               term.esc = 0;
+                               break;
+                       case '=': /* DECPAM -- Application keypad */
+                               term.mode |= MODE_APPKEYPAD;
+                               term.esc = 0;
+                               break;
+                       case '>': /* DECPNM -- Normal keypad */
+                               term.mode &= ~MODE_APPKEYPAD;
+                               term.esc = 0;
+                               break;
+                       case '7': /* DECSC -- Save Cursor */
+                               tcursor(CURSOR_SAVE);
+                               term.esc = 0;
+                               break;
+                       case '8': /* DECRC -- Restore Cursor */
+                               tcursor(CURSOR_LOAD);
+                               term.esc = 0;
+                               break;
+                       default:
+                               fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
+                               term.esc = 0;
+                       }
+               }
+       } else {
+               switch(c) {
                case '\t':
                        tputtab();
                        break;
                case '\b':
                case '\t':
                        tputtab();
                        break;
                case '\b':
-                       tcursor(CSleft);
+                       tmoveto(term.c.x-1, term.c.y);
                        break;
                case '\r':
                        tmoveto(0, term.c.y);
                        break;
                case '\r':
                        tmoveto(0, term.c.y);
@@ -786,227 +1038,347 @@ tputc(char c) {
                        tnewline();
                        break;
                case '\a':
                        tnewline();
                        break;
                case '\a':
-                       xbell();
+                       if(!xw.hasfocus)
+                               xseturgency(1);
+                       break;
+               case '\033':
+                       csireset();
+                       term.esc = ESC_START;
+                       break;
+               default:
+                       if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
+                               tnewline();
+                       tsetchar(c);
+                       if(term.c.x+1 < term.col)
+                               tmoveto(term.c.x+1, term.c.y);
+                       else
+                               term.c.state |= CURSOR_WRAPNEXT;
                        break;
                        break;
+               }
        }
 }
 
 void
        }
 }
 
 void
-tputs(char *s, int len) { 
+tputs(char *s, int len) {
        for(; len > 0; len--)
                tputc(*s++);
 }
 
        for(; len > 0; len--)
                tputc(*s++);
 }
 
-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;
 void
 tresize(int col, int row) {
        int i;
-       Line *line;
        int minrow = MIN(row, term.row);
        int mincol = MIN(col, term.col);
        int minrow = MIN(row, term.row);
        int mincol = MIN(col, term.col);
+       int slide = term.c.y - row + 1;
 
        if(col < 1 || row < 1)
                return;
 
        if(col < 1 || row < 1)
                return;
-       /* alloc */
-       line = calloc(row, sizeof(Line));
-       for(i = 0 ; i < row; i++)
-               line[i] = calloc(col, sizeof(Glyph));
-       /* copy */
-       for(i = 0 ; i < minrow; i++)
-               memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
-       /* free */
-       for(i = 0; i < term.row; i++)
+
+       /* free unneeded rows */
+       i = 0;
+       if(slide > 0) {
+               /* slide screen to keep cursor where we expect it -
+                * tscrollup would work here, but we can optimize to
+                * memmove because we're freeing the earlier lines */
+               for(/* i = 0 */; i < slide; i++) {
+                       free(term.line[i]);
+                       free(term.alt[i]);
+               }
+               memmove(term.line, term.line + slide, row * sizeof(Line));
+               memmove(term.alt, term.alt + slide, row * sizeof(Line));
+       }
+       for(i += row; i < term.row; i++) {
                free(term.line[i]);
                free(term.line[i]);
-       free(term.line);
-       
-       LIMIT(term.c.x, 0, col-1);
-       LIMIT(term.c.y, 0, row-1);
-       LIMIT(term.top, 0, row-1);
-       LIMIT(term.bot, 0, row-1);
+               free(term.alt[i]);
+       }
+
+       /* resize to new height */
+       term.line = realloc(term.line, row * sizeof(Line));
+       term.alt  = realloc(term.alt,  row * sizeof(Line));
+
+       /* resize each row to new width, zero-pad if needed */
+       for(i = 0; i < minrow; i++) {
+               term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
+               term.alt[i]  = realloc(term.alt[i],  col * sizeof(Glyph));
+               memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
+               memset(term.alt[i]  + mincol, 0, (col - mincol) * sizeof(Glyph));
+       }
+
+       /* allocate any new rows */
+       for(/* i == minrow */; i < row; i++) {
+               term.line[i] = calloc(col, sizeof(Glyph));
+               term.alt [i] = calloc(col, sizeof(Glyph));
+       }
        
        
-       term.bot = row-1;
-       term.line = line;
+       /* update terminal size */
        term.col = col, term.row = row;
        term.col = col, term.row = row;
+       /* make use of the LIMIT in tmoveto */
+       tmoveto(term.c.x, term.c.y);
+       /* reset scrolling region */
+       tsetscroll(0, row-1);
 }
 
 }
 
-unsigned long
-xgetcol(const char *s) {
+void
+xloadcols(void) {
+       int i, r, g, b;
        XColor color;
        XColor color;
-       Colormap cmap = DefaultColormap(xw.dis, xw.scr);
+       unsigned long white = WhitePixel(xw.dis, xw.scr);
+
+       for(i = 0; i < 16; i++) {
+               if (!XAllocNamedColor(xw.dis, xw.cmap, colorname[i], &color, &color)) {
+                       dc.col[i] = white;
+                       fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
+               } else
+                       dc.col[i] = color.pixel;
+       }
+
+       /* same colors as xterm */
+       for(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;
+                               color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
+                               color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
+                               if (!XAllocColor(xw.dis, xw.cmap, &color)) {
+                                       dc.col[i] = white;
+                                       fprintf(stderr, "Could not allocate color %d\n", i);
+                               } else
+                                       dc.col[i] = color.pixel;
+                               i++;
+                       }
 
 
-       if(!XAllocNamedColor(xw.dis, cmap, s, &color, &color)) {
-               color.pixel = WhitePixel(xw.dis, xw.scr);
-               fprintf(stderr, "Could not allocate color '%s'\n", s);
+       for(r = 0; r < 24; r++, i++) {
+               color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
+               if (!XAllocColor(xw.dis, xw.cmap, &color)) {
+                       dc.col[i] = white;
+                       fprintf(stderr, "Could not allocate color %d\n", i);
+               } else
+                       dc.col[i] = color.pixel;
        }
        }
-       return color.pixel;
 }
 
 void
 xclear(int x1, int y1, int x2, int y2) {
 }
 
 void
 xclear(int x1, int y1, int x2, int y2) {
-       XClearArea(xw.dis, xw.win, 
-                       x1 * xw.cw, y1 * xw.ch, 
-                       (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch, 
-                       False);
+       XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
+       XFillRectangle(xw.dis, xw.buf, dc.gc,
+                      x1 * xw.cw, y1 * xw.ch,
+                      (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
 }
 
 void
 }
 
 void
-xscroll(void) {
-       int srcy = (term.top+1) * xw.ch;
-       int dsty = term.top * xw.ch;
-       int height = (term.bot-term.top) * xw.ch;
-
-       xcursor(CShide);
-       XCopyArea(xw.dis, xw.win, xw.win, dc.gc, 0, srcy, xw.w, height, 0, dsty);
-       xclear(0, term.bot, term.col-1, term.bot);
+xhints(void)
+{
+       XClassHint 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.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
 }
 
 void
 xinit(void) {
 }
 
 void
 xinit(void) {
-       XGCValues values;
-       unsigned long valuemask;
-       XClassHint chint;
-       XWMHints wmhint;
-       XSizeHints shint;
-       char *args[] = {NULL};
-       int i;
+       XSetWindowAttributes attrs;
 
 
-       xw.dis = XOpenDisplay(NULL);
-       xw.scr = XDefaultScreen(xw.dis);
-       if(!xw.dis)
+       if(!(xw.dis = XOpenDisplay(NULL)))
                die("Can't open display\n");
                die("Can't open display\n");
+       xw.scr = XDefaultScreen(xw.dis);
        
        /* font */
        
        /* font */
-       if(!(dc.font = XLoadQueryFont(xw.dis, FONT)))
-               die("Can't load font %s\n", FONT);
+       if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
+               die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
 
 
+       /* XXX: Assuming same size for bold font */
        xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
        xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
-       xw.ch = dc.font->ascent + dc.font->descent + LINESPACE;
+       xw.ch = dc.font->ascent + dc.font->descent;
 
        /* colors */
 
        /* colors */
-       for(i = 0; i < LEN(colorname); i++)
-               dc.col[i] = xgetcol(colorname[i]);
-
-       term.c.attr.fg = DefaultFG;
-       term.c.attr.bg = DefaultBG;
-       term.c.attr.mode = ATnone;
-       /* windows */
-       xw.h = term.row * xw.ch;
-       xw.w = term.col * xw.cw;
-       /* XXX: this BORDER is useless after the first resize, handle it in xdraws() */
-       xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
-                       xw.w, xw.h, BORDER, 
-                       dc.col[DefaultBG],
-                       dc.col[DefaultBG]);
+       xw.cmap = XDefaultColormap(xw.dis, xw.scr);
+       xloadcols();
+
+       /* window - default size */
+       xw.bufh = 24 * xw.ch;
+       xw.bufw = 80 * 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;
+       attrs.event_mask = ExposureMask | KeyPressMask
+               | StructureNotifyMask | FocusChangeMask | PointerMotionMask
+               | ButtonPressMask | ButtonReleaseMask;
+       attrs.colormap = xw.cmap;
+
+       xw.win = XCreateWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
+                       xw.w, xw.h, 0, XDefaultDepth(xw.dis, xw.scr), InputOutput,
+                       XDefaultVisual(xw.dis, xw.scr),
+                       CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
+                       | CWColormap,
+                       &attrs);
+       xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
        /* gc */
        /* gc */
-       values.foreground = XWhitePixel(xw.dis, xw.scr);
-       values.font = dc.font->fid;
-       valuemask = GCForeground | GCFont;
-       dc.gc = XCreateGC(xw.dis, xw.win, valuemask, &values);
+       dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
+       
        XMapWindow(xw.dis, xw.win);
        XMapWindow(xw.dis, xw.win);
-       /* wm stuff */
-       chint.res_name = TNAME, chint.res_class = TNAME;
-       wmhint.input = 1, wmhint.flags = InputHint;
-       shint.height_inc = xw.ch, shint.width_inc = xw.cw;
-       shint.height = xw.h, shint.width = xw.w;
-       shint.flags = PSize | PResizeInc;
-       XSetWMProperties(xw.dis, xw.win, NULL, NULL, &args[0], 0, &shint, &wmhint, &chint);
-       XStoreName(xw.dis, xw.win, TNAME);
+       xhints();
+       XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
        XSync(xw.dis, 0);
 }
 
 void
        XSync(xw.dis, 0);
 }
 
 void
-xdrawc(int x, int y, Glyph g) {
-       XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
+xdraws(char *s, Glyph base, int x, int y, int len) {
        unsigned long xfg, xbg;
        unsigned long xfg, xbg;
+       int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
+       int i;
 
 
-       /* reverse video */
-       if(g.mode & ATreverse)
-               xfg = dc.col[g.bg], xbg = dc.col[g.fg];
+       if(base.mode & ATTR_REVERSE)
+               xfg = dc.col[base.bg], xbg = dc.col[base.fg];
        else
        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 */
+               xfg = dc.col[base.fg], xbg = dc.col[base.bg];
+
+       XSetBackground(xw.dis, dc.gc, xbg);
        XSetForeground(xw.dis, dc.gc, xfg);
        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);
-       }
+       
+       if(base.mode & ATTR_GFX)
+               for(i = 0; i < len; i++) {
+                       char c = gfx[(unsigned int)s[i] % 256];
+                       if(c)
+                               s[i] = c;
+                       else if(s[i] > 0x5f)
+                               s[i] -= 0x5f;
+               }
+
+       XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
+       XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
+       
+       if(base.mode & ATTR_UNDERLINE)
+               XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
 }
 
 void
 }
 
 void
-xcursor(int mode) {
+xdrawcursor(void) {
        static int oldx = 0;
        static int oldy = 0;
        static int oldx = 0;
        static int oldy = 0;
-       Glyph g = {' ', ATnone, DefaultBG, DefaultCS, 0};
+       Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
        
        LIMIT(oldx, 0, term.col-1);
        LIMIT(oldy, 0, term.row-1);
        
        
        LIMIT(oldx, 0, term.col-1);
        LIMIT(oldy, 0, term.row-1);
        
-       if(term.line[term.c.y][term.c.x].state & CRset)
+       if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
                g.c = term.line[term.c.y][term.c.x].c;
                g.c = term.line[term.c.y][term.c.x].c;
+       
        /* remove the old cursor */
        /* remove the old cursor */
-       if(term.line[oldy][oldx].state & CRset)
-               xdrawc(oldx, oldy, term.line[oldy][oldx]);
-       else 
+       if(term.line[oldy][oldx].state & GLYPH_SET)
+               xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
+       else
                xclear(oldx, oldy, oldx, oldy);
                xclear(oldx, oldy, oldx, oldy);
+       
        /* draw the new one */
        /* draw the new one */
-       if(mode == CSdraw) {
-               xdrawc(term.c.x, term.c.y, g);
+       if(!(term.c.state & CURSOR_HIDE) && xw.hasfocus) {
+               xdraws(&g.c, g, term.c.x, term.c.y, 1);
                oldx = term.c.x, oldy = term.c.y;
        }
 }
 
                oldx = term.c.x, oldy = term.c.y;
        }
 }
 
+#ifdef DEBUG
+/* basic drawing routines */
 void
 void
-draw(int redraw_all) {
+xdrawc(int x, int y, Glyph g) {
+       XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
+       XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
+       XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
+       XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
+       XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
+}
+
+void
+draw(int dummy) {
        int x, y;
        int x, y;
-       int changed, set;
 
 
-       if(redraw_all)
-               XClearWindow(xw.dis, xw.win);
+       xclear(0, 0, term.col-1, term.row-1);
+       for(y = 0; y < term.row; y++)
+               for(x = 0; x < term.col; x++)
+                       if(term.line[y][x].state & GLYPH_SET)
+                               xdrawc(x, y, term.line[y][x]);
 
 
-       /* XXX: drawing could be optimised */
+       xdrawcursor();
+       XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
+       XFlush(xw.dis);
+}
+
+#else
+/* optimized drawing routine */
+void
+draw(int redraw_all) {
+       int i, x, y, ox;
+       Glyph base, new;
+       char buf[DRAW_BUF_SIZ];
+
+       xclear(0, 0, term.col-1, term.row-1);
        for(y = 0; y < term.row; y++) {
        for(y = 0; y < term.row; y++) {
+               base = term.line[y][0];
+               i = ox = 0;
                for(x = 0; x < term.col; x++) {
                for(x = 0; x < term.col; x++) {
-                       changed = term.line[y][x].state & CRupdate;
-                       set = term.line[y][x].state & CRset;
-                       if(redraw_all || changed) {
-                               term.line[y][x].state &= ~CRupdate;
-                               if(set)
-                                       xdrawc(x, y, term.line[y][x]);
-                               else
-                                       xclear(x, y, x, y);
+                       new = term.line[y][x];
+                       if(sel.bx!=-1 && new.c && selected(x, y))
+                               new.mode ^= ATTR_REVERSE;
+                       if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
+                                       i >= DRAW_BUF_SIZ)) {
+                               xdraws(buf, base, ox, y, i);
+                               i = 0;
+                       }
+                       if(new.state & GLYPH_SET) {
+                               if(i == 0) {
+                                       ox = x;
+                                       base = new;
+                               }
+                               buf[i++] = new.c;
                        }
                }
                        }
                }
+               if(i > 0)
+                       xdraws(buf, base, ox, y, i);
        }
        }
-       xcursor(CSdraw);
+       xdrawcursor();
+       XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
+       XFlush(xw.dis);
 }
 
 }
 
+#endif
+
 void
 expose(XEvent *ev) {
 void
 expose(XEvent *ev) {
-       draw(SCredraw);
+       draw(SCREEN_REDRAW);
+}
+
+void
+xseturgency(int add) {
+       XWMHints *h = XGetWMHints(xw.dis, xw.win);
+       h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
+       XSetWMHints(xw.dis, xw.win, h);
+       XFree(h);
+}
+
+void
+focus(XEvent *ev) {
+       if((xw.hasfocus = ev->type == FocusIn))
+               xseturgency(0);
+       draw(SCREEN_UPDATE);
+}
+
+char*
+kmap(KeySym k) {
+       int i;
+       for(i = 0; i < LEN(key); i++)
+               if(key[i].k == k)
+                       return (char*)key[i].s;
+       return NULL;
 }
 
 void
 }
 
 void
@@ -1014,15 +1386,17 @@ kpress(XEvent *ev) {
        XKeyEvent *e = &ev->xkey;
        KeySym ksym;
        char buf[32];
        XKeyEvent *e = &ev->xkey;
        KeySym ksym;
        char buf[32];
+       char *customkey;
        int len;
        int meta;
        int shift;
 
        int len;
        int meta;
        int shift;
 
-       meta  = e->state & Mod1Mask;
+       meta = e->state & Mod1Mask;
        shift = e->state & ShiftMask;
        len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
        shift = e->state & ShiftMask;
        len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
-       if(key[ksym])
-               ttywrite(key[ksym], strlen(key[ksym]));
+
+       if((customkey = kmap(ksym)))
+               ttywrite(customkey, strlen(customkey));
        else if(len > 0) {
                buf[sizeof(buf)-1] = '\0';
                if(meta && len == 1)
        else if(len > 0) {
                buf[sizeof(buf)-1] = '\0';
                if(meta && len == 1)
@@ -1030,9 +1404,16 @@ kpress(XEvent *ev) {
                ttywrite(buf, len);
        } else
                switch(ksym) {
                ttywrite(buf, len);
        } else
                switch(ksym) {
+               case XK_Up:
+               case XK_Down:
+               case XK_Left:
+               case XK_Right:
+                       sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
+                       ttywrite(buf, 3);
+                       break;
                case XK_Insert:
                        if(shift)
                case XK_Insert:
                        if(shift)
-                               /* XXX: paste X clipboard */;
+                               selpaste(), draw(1);
                        break;
                default:
                        fprintf(stderr, "errkey: %d\n", (int)ksym);
                        break;
                default:
                        fprintf(stderr, "errkey: %d\n", (int)ksym);
@@ -1043,16 +1424,22 @@ kpress(XEvent *ev) {
 void
 resize(XEvent *e) {
        int col, row;
 void
 resize(XEvent *e) {
        int col, row;
-       col = e->xconfigure.width / xw.cw;
-       row = e->xconfigure.height / xw.ch;
        
        
-       if(term.col != col || term.row != row) {
-               tresize(col, row);
-               ttyresize(col, row);
-               xw.w = e->xconfigure.width;
-               xw.h = e->xconfigure.height;
-               draw(SCredraw);
-       }
+       if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
+               return;
+       
+       xw.w = e->xconfigure.width;
+       xw.h = e->xconfigure.height;
+       xw.bufw = xw.w - 2*BORDER;
+       xw.bufh = xw.h - 2*BORDER;
+       col = xw.bufw / xw.cw;
+       row = xw.bufh / xw.ch;
+       tresize(col, row);
+       ttyresize(col, row);
+       xw.bufh = MAX(1, xw.bufh);
+       xw.bufw = MAX(1, xw.bufw);
+       XFreePixmap(xw.dis, xw.buf);
+       xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
 }
 
 void
 }
 
 void
@@ -1061,22 +1448,18 @@ run(void) {
        fd_set rfd;
        int xfd = XConnectionNumber(xw.dis);
 
        fd_set rfd;
        int xfd = XConnectionNumber(xw.dis);
 
-       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) {
+       for(;;) {
                FD_ZERO(&rfd);
                FD_SET(cmdfd, &rfd);
                FD_SET(xfd, &rfd);
                FD_ZERO(&rfd);
                FD_SET(cmdfd, &rfd);
                FD_SET(xfd, &rfd);
-               if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
+               if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
                        if(errno == EINTR)
                                continue;
                        die("select failed: %s\n", SERRNO);
                }
                if(FD_ISSET(cmdfd, &rfd)) {
                        ttyread();
                        if(errno == EINTR)
                                continue;
                        die("select failed: %s\n", SERRNO);
                }
                if(FD_ISSET(cmdfd, &rfd)) {
                        ttyread();
-                       draw(SCupdate);
+                       draw(SCREEN_UPDATE); 
                }
                while(XPending(xw.dis)) {
                        XNextEvent(xw.dis, &ev);
                }
                while(XPending(xw.dis)) {
                        XNextEvent(xw.dis, &ev);
@@ -1088,14 +1471,26 @@ run(void) {
 
 int
 main(int argc, char *argv[]) {
 
 int
 main(int argc, char *argv[]) {
-       if(argc == 2 && !strncmp("-v", argv[1], 3))
-               die("st-" VERSION ", © 2009 st engineers\n");
-       else if(argc != 1)
-               die("usage: st [-v]\n");
+       int i;
+       
+       for(i = 1; i < argc; i++) {
+               switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
+               case 't':
+                       if(++i < argc) opt_title = argv[i];
+                       break;
+               case 'e':
+                       if(++i < argc) opt_cmd = argv[i];
+                       break;
+               case 'v':
+               default:
+                       die(USAGE);
+               }
+       }
        setlocale(LC_CTYPE, "");
        tnew(80, 24);
        ttynew();
        xinit();
        setlocale(LC_CTYPE, "");
        tnew(80, 24);
        ttynew();
        xinit();
+       selinit();
        run();
        return 0;
 }
        run();
        return 0;
 }