Render faint attribute

[st.git] / st.c

diff --git a/st.c b/st.c
index 64a37e1..69ec122 100644 (file)
--- a/st.c
+++ b/st.c
@@ -1,14 +1,1133 @@
 /* See LICENSE for licence details. */
 /* See LICENSE for licence details. */

-#include "st.h"
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <locale.h>
+#include <pwd.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <stdint.h>
+#include <sys/ioctl.h>
+#include <sys/select.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+#include <libgen.h>
+#include <X11/Xatom.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/cursorfont.h>
+#include <X11/keysym.h>
+#include <X11/Xft/Xft.h>
+#include <fontconfig/fontconfig.h>
+#include <wchar.h>
+
+#include "arg.h"
+
+char *argv0;
+
+#define Glyph Glyph_
+#define Font Font_
+
+#if   defined(__linux)
+ #include <pty.h>
+#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
+ #include <util.h>
+#elif defined(__FreeBSD__) || defined(__DragonFly__)
+ #include <libutil.h>
+#endif
+
+
+/* XEMBED messages */
+#define XEMBED_FOCUS_IN  4
+#define XEMBED_FOCUS_OUT 5
+
+/* Arbitrary sizes */
+#define UTF_INVALID   0xFFFD
+#define UTF_SIZ       4
+#define ESC_BUF_SIZ   (128*UTF_SIZ)
+#define ESC_ARG_SIZ   16
+#define STR_BUF_SIZ   ESC_BUF_SIZ
+#define STR_ARG_SIZ   ESC_ARG_SIZ
+#define DRAW_BUF_SIZ  20*1024
+#define XK_ANY_MOD    UINT_MAX
+#define XK_NO_MOD     0
+#define XK_SWITCH_MOD (1<<13)
+
+#define REDRAW_TIMEOUT (80*1000) /* 80 ms */
+
+/* macros */
+#define MIN(a, b)  ((a) < (b) ? (a) : (b))
+#define MAX(a, b)  ((a) < (b) ? (b) : (a))
+#define LEN(a)     (sizeof(a) / sizeof(a)[0])
+#define DEFAULT(a, b)     (a) = (a) ? (a) : (b)
+#define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
+#define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f))
+#define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
+#define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
+#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)) != 0)
+#define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_nsec-t2.tv_nsec)/1E6)
+#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
+
+#define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
+#define IS_TRUECOL(x)    (1 << 24 & (x))
+#define TRUERED(x)       (((x) & 0xff0000) >> 8)
+#define TRUEGREEN(x)     (((x) & 0xff00))
+#define TRUEBLUE(x)      (((x) & 0xff) << 8)
+
+
+#define VT102ID "\033[?6c"
+
+enum glyph_attribute {
+        ATTR_NULL      = 0,
+       ATTR_BOLD      = 1,
+       ATTR_FAINT     = 2,
+       ATTR_ITALIC    = 4,
+       ATTR_UNDERLINE = 8,
+       ATTR_BLINK     = 16,
+       ATTR_FASTBLINK = 32,
+       ATTR_REVERSE   = 64,
+       ATTR_INVISIBLE = 128,
+       ATTR_STRUCK    = 256,
+       ATTR_WRAP      = 512,
+       ATTR_WIDE      = 1024,
+       ATTR_WDUMMY    = 2048,
+};
+
+enum cursor_movement {
+       CURSOR_SAVE,
+       CURSOR_LOAD
+};
+
+enum cursor_state {
+       CURSOR_DEFAULT  = 0,
+       CURSOR_WRAPNEXT = 1,
+       CURSOR_ORIGIN   = 2
+};
+
+enum term_mode {
+       MODE_WRAP        = 1,
+       MODE_INSERT      = 2,
+       MODE_APPKEYPAD   = 4,
+       MODE_ALTSCREEN   = 8,
+       MODE_CRLF        = 16,
+       MODE_MOUSEBTN    = 32,
+       MODE_MOUSEMOTION = 64,
+       MODE_REVERSE     = 128,
+       MODE_KBDLOCK     = 256,
+       MODE_HIDE        = 512,
+       MODE_ECHO        = 1024,
+       MODE_APPCURSOR   = 2048,
+       MODE_MOUSESGR    = 4096,
+       MODE_8BIT        = 8192,
+       MODE_BLINK       = 16384,
+       MODE_FBLINK      = 32768,
+       MODE_FOCUS       = 65536,
+       MODE_MOUSEX10    = 131072,
+       MODE_MOUSEMANY   = 262144,
+       MODE_BRCKTPASTE  = 524288,
+       MODE_PRINT       = 1048576,
+       MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
+                         |MODE_MOUSEMANY,
+};
+
+enum charset {
+       CS_GRAPHIC0,
+       CS_GRAPHIC1,
+       CS_UK,
+       CS_USA,
+       CS_MULTI,
+       CS_GER,
+       CS_FIN
+};
+
+enum escape_state {
+       ESC_START      = 1,
+       ESC_CSI        = 2,
+       ESC_STR        = 4,  /* DCS, OSC, PM, APC */
+       ESC_ALTCHARSET = 8,
+       ESC_STR_END    = 16, /* a final string was encountered */
+       ESC_TEST       = 32, /* Enter in test mode */
+};
+
+enum window_state {
+       WIN_VISIBLE = 1,
+       WIN_REDRAW  = 2,
+       WIN_FOCUSED = 4
+};
+
+enum selection_type {
+       SEL_REGULAR = 1,
+       SEL_RECTANGULAR = 2
+};
+
+enum selection_snap {
+       SNAP_WORD = 1,
+       SNAP_LINE = 2
+};
+
+typedef unsigned char uchar;
+typedef unsigned int uint;
+typedef unsigned long ulong;
+typedef unsigned short ushort;
+
+typedef XftDraw *Draw;
+typedef XftColor Color;
+
+typedef struct {
+       char c[UTF_SIZ]; /* character code */
+       ushort mode;      /* attribute flags */
+       uint32_t fg;      /* foreground  */
+       uint32_t bg;      /* background  */
+} Glyph;
+
+typedef Glyph *Line;
+
+typedef struct {
+       Glyph attr; /* current char attributes */
+       int x;
+       int y;
+       char state;
+} TCursor;
+
+/* CSI Escape sequence structs */
+/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
+typedef struct {
+       char buf[ESC_BUF_SIZ]; /* raw string */
+       int len;               /* raw string length */
+       char priv;
+       int arg[ESC_ARG_SIZ];
+       int narg;              /* nb of args */
+       char mode;
+} CSIEscape;
+
+/* STR Escape sequence structs */
+/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
+typedef struct {
+       char type;             /* ESC type ... */
+       char buf[STR_BUF_SIZ]; /* raw string */
+       int len;               /* raw string length */
+       char *args[STR_ARG_SIZ];
+       int narg;              /* nb of args */
+} STREscape;
+
+/* Internal representation of the screen */
+typedef struct {
+       int row;      /* nb row */
+       int col;      /* nb col */
+       Line *line;   /* screen */
+       Line *alt;    /* alternate screen */
+       bool *dirty;  /* dirtyness of lines */
+       TCursor c;    /* cursor */
+       int top;      /* top    scroll limit */
+       int bot;      /* bottom scroll limit */
+       int mode;     /* terminal mode flags */
+       int esc;      /* escape state flags */
+       char trantbl[4]; /* charset table translation */
+       int charset;  /* current charset */
+       int icharset; /* selected charset for sequence */
+       bool numlock; /* lock numbers in keyboard */
+       bool *tabs;
+} Term;
+
+/* Purely graphic info */
+typedef struct {
+       Display *dpy;
+       Colormap cmap;
+       Window win;
+       Drawable buf;
+       Atom xembed, wmdeletewin, netwmname, netwmpid;
+       XIM xim;
+       XIC xic;
+       Draw draw;
+       Visual *vis;
+       XSetWindowAttributes attrs;
+       int scr;
+       bool isfixed; /* is fixed geometry? */
+       int l, t; /* left and top offset */
+       int gm; /* geometry mask */
+       int tw, th; /* tty width and height */
+       int w, h; /* window width and height */
+       int ch; /* char height */
+       int cw; /* char width  */
+       char state; /* focus, redraw, visible */
+} XWindow;
+
+typedef struct {
+       uint b;
+       uint mask;
+       char *s;
+} Mousekey;
+
+typedef struct {
+       KeySym k;
+       uint mask;
+       char *s;
+       /* three valued logic variables: 0 indifferent, 1 on, -1 off */
+       signed char appkey;    /* application keypad */
+       signed char appcursor; /* application cursor */
+       signed char crlf;      /* crlf mode          */
+} Key;
+
+typedef struct {
+       int mode;
+       int type;
+       int snap;
+       /*
+        * Selection variables:
+        * nb – normalized coordinates of the beginning of the selection
+        * ne – normalized coordinates of the end of the selection
+        * ob – original coordinates of the beginning of the selection
+        * oe – original coordinates of the end of the selection
+        */
+       struct {
+               int x, y;
+       } nb, ne, ob, oe;
+
+       char *clip;
+       Atom xtarget;
+       bool alt;
+       struct timespec tclick1;
+       struct timespec tclick2;
+} Selection;
+
+typedef union {
+       int i;
+       uint ui;
+       float f;
+       const void *v;
+} Arg;
+
+typedef struct {
+       uint mod;
+       KeySym keysym;
+       void (*func)(const Arg *);
+       const Arg arg;
+} Shortcut;
+
+/* function definitions used in config.h */
+static void clippaste(const Arg *);
+static void numlock(const Arg *);
+static void selpaste(const Arg *);
+static void xzoom(const Arg *);
+static void printsel(const Arg *);
+static void printscreen(const Arg *) ;
+static void toggleprinter(const Arg *);
+
+/* Config.h for applying patches and the configuration. */
+#include "config.h"
+
+/* Font structure */
+typedef struct {
+       int height;
+       int width;
+       int ascent;
+       int descent;
+       short lbearing;
+       short rbearing;
+       XftFont *match;
+       FcFontSet *set;
+       FcPattern *pattern;
+} Font;
+
+/* Drawing Context */
+typedef struct {
+       Color col[MAX(LEN(colorname), 256)];
+       Font font, bfont, ifont, ibfont;
+       GC gc;
+} DC;
+
+static void die(const char *, ...);
+static void draw(void);
+static void redraw(int);
+static void drawregion(int, int, int, 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 strdump(void);
+static void strhandle(void);
+static void strparse(void);
+static void strreset(void);
+
+static int tattrset(int);
+static void tprinter(char *, size_t);
+static void tdumpsel(void);
+static void tdumpline(int);
+static void tdump(void);
+static void tclearregion(int, int, int, int);
+static void tcursor(int);
+static void tdeletechar(int);
+static void tdeleteline(int);
+static void tinsertblank(int);
+static void tinsertblankline(int);
+static int tlinelen(int);
+static void tmoveto(int, int);
+static void tmoveato(int, int);
+static void tnew(int, int);
+static void tnewline(int);
+static void tputtab(int);
+static void tputc(char *, int);
+static void treset(void);
+static int tresize(int, int);
+static void tscrollup(int, int);
+static void tscrolldown(int, int);
+static void tsetattr(int *, int);
+static void tsetchar(char *, Glyph *, int, int);
+static void tsetscroll(int, int);
+static void tswapscreen(void);
+static void tsetdirt(int, int);
+static void tsetdirtattr(int);
+static void tsetmode(bool, bool, int *, int);
+static void tfulldirt(void);
+static void techo(char *, int);
+static void tcontrolcode(uchar );
+static void tdectest(char );
+static int32_t tdefcolor(int *, int *, int);
+static void tdeftran(char);
+static inline bool match(uint, uint);
+static void ttynew(void);
+static void ttyread(void);
+static void ttyresize(void);
+static void ttysend(char *, size_t);
+static void ttywrite(const char *, size_t);
+
+static void xdraws(char *, Glyph, int, int, int, int);
+static void xhints(void);
+static void xclear(int, int, int, int);
+static void xdrawcursor(void);
+static void xinit(void);
+static void xloadcols(void);
+static int xsetcolorname(int, const char *);
+static int xgeommasktogravity(int);
+static int xloadfont(Font *, FcPattern *);
+static void xloadfonts(char *, double);
+static int xloadfontset(Font *);
+static void xsettitle(char *);
+static void xresettitle(void);
+static void xsetpointermotion(int);
+static void xseturgency(int);
+static void xsetsel(char *);
+static void xtermclear(int, int, int, int);
+static void xunloadfont(Font *);
+static void xunloadfonts(void);
+static void xresize(int, int);
+
+static void expose(XEvent *);
+static void visibility(XEvent *);
+static void unmap(XEvent *);
+static char *kmap(KeySym, uint);
+static void kpress(XEvent *);
+static void cmessage(XEvent *);
+static void cresize(int, int);
+static void resize(XEvent *);
+static void focus(XEvent *);
+static void brelease(XEvent *);
+static void bpress(XEvent *);
+static void bmotion(XEvent *);
+static void selnotify(XEvent *);
+static void selclear(XEvent *);
+static void selrequest(XEvent *);
+
+static void selinit(void);
+static void selnormalize(void);
+static inline bool selected(int, int);
+static char *getsel(void);
+static void selcopy(void);
+static void selscroll(int, int);
+static void selsnap(int, int *, int *, int);
+static void getbuttoninfo(XEvent *);
+static void mousereport(XEvent *);
+
+static size_t utf8decode(char *, long *, size_t);
+static long utf8decodebyte(char, size_t *);
+static size_t utf8encode(long, char *, size_t);
+static char utf8encodebyte(long, size_t);
+static size_t utf8len(char *);
+static size_t utf8validate(long *, size_t);
+
+static ssize_t xwrite(int, const char *, size_t);
+static void *xmalloc(size_t);
+static void *xrealloc(void *, size_t);
+static char *xstrdup(char *);
+
+static void usage(void);
+
+static void (*handler[LASTEvent])(XEvent *) = {
+       [KeyPress] = kpress,
+       [ClientMessage] = cmessage,
+       [ConfigureNotify] = resize,
+       [VisibilityNotify] = visibility,
+       [UnmapNotify] = unmap,
+       [Expose] = expose,
+       [FocusIn] = focus,
+       [FocusOut] = focus,
+       [MotionNotify] = bmotion,
+       [ButtonPress] = bpress,
+       [ButtonRelease] = brelease,
+       [SelectionClear] = selclear,
+       [SelectionNotify] = selnotify,
+       [SelectionRequest] = selrequest,
+};

 
 /* Globals */
 
 /* 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 csiescseq;
+static STREscape strescseq;
+static int cmdfd;
+static pid_t pid;
+static Selection sel;
+static int iofd = STDOUT_FILENO;
+static char **opt_cmd = NULL;
+static char *opt_io = NULL;
+static char *opt_title = NULL;
+static char *opt_embed = NULL;
+static char *opt_class = NULL;
+static char *opt_font = NULL;
+static int oldbutton = 3; /* button event on startup: 3 = release */
+
+static char *usedfont = NULL;
+static double usedfontsize = 0;
+
+static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
+static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+static long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
+static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
+
+/* Font Ring Cache */
+enum {
+       FRC_NORMAL,
+       FRC_ITALIC,
+       FRC_BOLD,
+       FRC_ITALICBOLD
+};
+
+typedef struct {
+       XftFont *font;
+       int flags;
+} Fontcache;
+
+/* Fontcache is an array now. A new font will be appended to the array. */
+static Fontcache frc[16];
+static int frclen = 0;
+
+ssize_t
+xwrite(int fd, const char *s, size_t len) {
+       size_t aux = len;
+
+       while(len > 0) {
+               ssize_t r = write(fd, s, len);
+               if(r < 0)
+                       return r;
+               len -= r;
+               s += r;
+       }
+       return aux;
+}
+
+void *
+xmalloc(size_t len) {
+       void *p = malloc(len);
+
+       if(!p)
+               die("Out of memory\n");
+
+       return p;
+}
+
+void *
+xrealloc(void *p, size_t len) {
+       if((p = realloc(p, len)) == NULL)
+               die("Out of memory\n");
+
+       return p;
+}
+
+char *
+xstrdup(char *s) {
+       if((s = strdup(s)) == NULL)
+               die("Out of memory\n");
+
+       return s;
+}
+
+size_t
+utf8decode(char *c, long *u, size_t clen) {
+       size_t i, j, len, type;
+       long udecoded;
+
+       *u = UTF_INVALID;
+       if(!clen)
+               return 0;
+       udecoded = utf8decodebyte(c[0], &len);
+       if(!BETWEEN(len, 1, UTF_SIZ))
+               return 1;
+       for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
+               udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
+               if(type != 0)
+                       return j;
+       }
+       if(j < len)
+               return 0;
+       *u = udecoded;
+       utf8validate(u, len);
+       return len;
+}
+
+long
+utf8decodebyte(char c, size_t *i) {
+       for(*i = 0; *i < LEN(utfmask); ++(*i))
+               if(((uchar)c & utfmask[*i]) == utfbyte[*i])
+                       return (uchar)c & ~utfmask[*i];
+       return 0;
+}
+
+size_t
+utf8encode(long u, char *c, size_t clen) {
+       size_t len, i;
+
+       len = utf8validate(&u, 0);
+       if(clen < len)
+               return 0;
+       for(i = len - 1; i != 0; --i) {
+               c[i] = utf8encodebyte(u, 0);
+               u >>= 6;
+       }
+       c[0] = utf8encodebyte(u, len);
+       return len;
+}
+
+char
+utf8encodebyte(long u, size_t i) {
+       return utfbyte[i] | (u & ~utfmask[i]);
+}
+
+size_t
+utf8len(char *c) {
+       return utf8decode(c, &(long){0}, UTF_SIZ);
+}
+
+size_t
+utf8validate(long *u, size_t i) {
+       if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
+               *u = UTF_INVALID;
+       for(i = 1; *u > utfmax[i]; ++i)
+               ;
+       return i;
+}
+
+static void
+selinit(void) {
+       memset(&sel.tclick1, 0, sizeof(sel.tclick1));
+       memset(&sel.tclick2, 0, sizeof(sel.tclick2));
+       sel.mode = 0;
+       sel.ob.x = -1;
+       sel.clip = NULL;
+       sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
+       if(sel.xtarget == None)
+               sel.xtarget = XA_STRING;
+}
+
+static int
+x2col(int x) {
+       x -= borderpx;
+       x /= xw.cw;
+
+       return LIMIT(x, 0, term.col-1);
+}
+
+static int
+y2row(int y) {
+       y -= borderpx;
+       y /= xw.ch;
+
+       return LIMIT(y, 0, term.row-1);
+}
+
+static int tlinelen(int y) {
+       int i = term.col;
+
+       while (i > 0 && term.line[y][i - 1].c[0] == ' ')
+               --i;
+
+       return i;
+}
+
+static void
+selnormalize(void) {
+       int i;
+
+       if(sel.ob.y == sel.oe.y || sel.type == SEL_RECTANGULAR) {
+               sel.nb.x = MIN(sel.ob.x, sel.oe.x);
+               sel.ne.x = MAX(sel.ob.x, sel.oe.x);
+       } else {
+               sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
+               sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
+       }
+       sel.nb.y = MIN(sel.ob.y, sel.oe.y);
+       sel.ne.y = MAX(sel.ob.y, sel.oe.y);
+
+       /* expand selection over line breaks */
+       if (sel.type == SEL_RECTANGULAR)
+               return;
+       i = tlinelen(sel.nb.y);
+       if (i < sel.nb.x)
+               sel.nb.x = i;
+       if (tlinelen(sel.ne.y) <= sel.ne.x)
+               sel.ne.x = term.col - 1;
+}
+
+static inline bool
+selected(int x, int y) {
+       if(sel.type == SEL_RECTANGULAR)
+               return BETWEEN(y, sel.nb.y, sel.ne.y)
+                   && BETWEEN(x, sel.nb.x, sel.ne.x);
+
+       return BETWEEN(y, sel.nb.y, sel.ne.y)
+           && (y != sel.nb.y || x >= sel.nb.x)
+           && (y != sel.ne.y || x <= sel.ne.x);
+}
+
+void
+selsnap(int mode, int *x, int *y, int direction) {
+       int newx, newy, xt, yt;
+       Glyph *gp;
+
+       switch(mode) {
+       case SNAP_WORD:
+               /*
+                * Snap around if the word wraps around at the end or
+                * beginning of a line.
+                */
+               for(;;) {
+                       newx = *x + direction;
+                       newy = *y;
+                       if(!BETWEEN(newx, 0, term.col - 1)) {
+                               newy += direction;
+                               newx = (newx + term.col) % term.col;
+                               if (!BETWEEN(newy, 0, term.row - 1))
+                                       break;
+
+                               if(direction > 0)
+                                       yt = *y, xt = *x;
+                               else
+                                       yt = newy, xt = newx;
+                               if(!(term.line[yt][xt].mode & ATTR_WRAP))
+                                       break;
+                       }
+
+                       if (newx >= tlinelen(newy))
+                               break;
+
+                       gp = &term.line[newy][newx];
+                       if (!(gp->mode & ATTR_WDUMMY) && strchr(worddelimiters, gp->c[0]))
+                               break;
+
+                       *x = newx;
+                       *y = newy;
+               }
+               break;
+       case SNAP_LINE:
+               /*
+                * Snap around if the the previous line or the current one
+                * has set ATTR_WRAP at its end. Then the whole next or
+                * previous line will be selected.
+                */
+               *x = (direction < 0) ? 0 : term.col - 1;
+               if(direction < 0 && *y > 0) {
+                       for(; *y > 0; *y += direction) {
+                               if(!(term.line[*y-1][term.col-1].mode
+                                               & ATTR_WRAP)) {
+                                       break;
+                               }
+                       }
+               } else if(direction > 0 && *y < term.row-1) {
+                       for(; *y < term.row; *y += direction) {
+                               if(!(term.line[*y][term.col-1].mode
+                                               & ATTR_WRAP)) {
+                                       break;
+                               }
+                       }
+               }
+               break;
+       }
+}
+
+void
+getbuttoninfo(XEvent *e) {
+       int type;
+       uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
+
+       sel.alt = IS_SET(MODE_ALTSCREEN);
+
+       sel.oe.x = x2col(e->xbutton.x);
+       sel.oe.y = y2row(e->xbutton.y);
+
+       if(sel.ob.y < sel.oe.y
+                       || (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
+               selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
+               selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
+       } else {
+               selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
+               selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
+       }
+       selnormalize();
+
+       sel.type = SEL_REGULAR;
+       for(type = 1; type < LEN(selmasks); ++type) {
+               if(match(selmasks[type], state)) {
+                       sel.type = type;
+                       break;
+               }
+       }
+}
+
+void
+mousereport(XEvent *e) {
+       int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
+           button = e->xbutton.button, state = e->xbutton.state,
+           len;
+       char buf[40];
+       static int ox, oy;
+
+       /* from urxvt */
+       if(e->xbutton.type == MotionNotify) {
+               if(x == ox && y == oy)
+                       return;
+               if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
+                       return;
+               /* MOUSE_MOTION: no reporting if no button is pressed */
+               if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
+                       return;
+
+               button = oldbutton + 32;
+               ox = x;
+               oy = y;
+       } else {
+               if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
+                       button = 3;
+               } else {
+                       button -= Button1;
+                       if(button >= 3)
+                               button += 64 - 3;
+               }
+               if(e->xbutton.type == ButtonPress) {
+                       oldbutton = button;
+                       ox = x;
+                       oy = y;
+               } else if(e->xbutton.type == ButtonRelease) {
+                       oldbutton = 3;
+                       /* MODE_MOUSEX10: no button release reporting */
+                       if(IS_SET(MODE_MOUSEX10))
+                               return;
+                       if (button == 64 || button == 65)
+                               return;
+               }
+       }
+
+       if(!IS_SET(MODE_MOUSEX10)) {
+               button += (state & ShiftMask   ? 4  : 0)
+                       + (state & Mod4Mask    ? 8  : 0)
+                       + (state & ControlMask ? 16 : 0);
+       }
+
+       len = 0;
+       if(IS_SET(MODE_MOUSESGR)) {
+               len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
+                               button, x+1, y+1,
+                               e->xbutton.type == ButtonRelease ? 'm' : 'M');
+       } else if(x < 223 && y < 223) {
+               len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
+                               32+button, 32+x+1, 32+y+1);
+       } else {
+               return;
+       }
+
+       ttywrite(buf, len);
+}
+
+void
+bpress(XEvent *e) {
+       struct timespec now;
+       Mousekey *mk;
+
+       if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
+               mousereport(e);
+               return;
+       }
+
+       for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
+               if(e->xbutton.button == mk->b
+                               && match(mk->mask, e->xbutton.state)) {
+                       ttysend(mk->s, strlen(mk->s));
+                       return;
+               }
+       }
+
+       if(e->xbutton.button == Button1) {
+               clock_gettime(CLOCK_MONOTONIC, &now);
+
+               /* Clear previous selection, logically and visually. */
+               selclear(NULL);
+               sel.mode = 1;
+               sel.type = SEL_REGULAR;
+               sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
+               sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
+
+               /*
+                * If the user clicks below predefined timeouts specific
+                * snapping behaviour is exposed.
+                */
+               if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
+                       sel.snap = SNAP_LINE;
+               } else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
+                       sel.snap = SNAP_WORD;
+               } else {
+                       sel.snap = 0;
+               }
+               selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
+               selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
+               selnormalize();
+
+               /*
+                * Draw selection, unless it's regular and we don't want to
+                * make clicks visible
+                */
+               if(sel.snap != 0) {
+                       sel.mode++;
+                       tsetdirt(sel.nb.y, sel.ne.y);
+               }
+               sel.tclick2 = sel.tclick1;
+               sel.tclick1 = now;
+       }
+}
+
+char *
+getsel(void) {
+       char *str, *ptr;
+       int y, bufsize, size, lastx, linelen;
+       Glyph *gp, *last;
+
+       if(sel.ob.x == -1)
+               return NULL;
+
+       bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
+       ptr = str = xmalloc(bufsize);
+
+       /* append every set & selected glyph to the selection */
+       for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
+               linelen = tlinelen(y);
+
+               if(sel.type == SEL_RECTANGULAR) {
+                       gp = &term.line[y][sel.nb.x];
+                       lastx = sel.ne.x;
+               } else {
+                       gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
+                       lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
+               }
+               last = &term.line[y][MIN(lastx, linelen-1)];
+
+               for( ; gp <= last; ++gp) {
+                       if(gp->mode & ATTR_WDUMMY)
+                               continue;
+
+                       size = utf8len(gp->c);
+                       memcpy(ptr, gp->c, size);
+                       ptr += size;
+               }
+
+               /*
+                * Copy and pasting of line endings is inconsistent
+                * in the inconsistent terminal and GUI world.
+                * The best solution seems like to produce '\n' when
+                * something is copied from st and convert '\n' to
+                * '\r', when something to be pasted is received by
+                * st.
+                * FIXME: Fix the computer world.
+                */
+               if(sel.ne.y > y || lastx >= linelen)
+                       *ptr++ = '\n';
+       }
+       *ptr = 0;
+       return str;
+}
+
+void
+selcopy(void) {
+       xsetsel(getsel());
+}
+
+void
+selnotify(XEvent *e) {
+       ulong nitems, ofs, rem;
+       int format;
+       uchar *data, *last, *repl;
+       Atom type;
+
+       ofs = 0;
+       do {
+               if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
+                                       False, AnyPropertyType, &type, &format,
+                                       &nitems, &rem, &data)) {
+                       fprintf(stderr, "Clipboard allocation failed\n");
+                       return;
+               }
+
+               /*
+                * As seen in getsel:
+                * Line endings are inconsistent in the terminal and GUI world
+                * copy and pasting. When receiving some selection data,
+                * replace all '\n' with '\r'.
+                * FIXME: Fix the computer world.
+                */
+               repl = data;
+               last = data + nitems * format / 8;
+               while((repl = memchr(repl, '\n', last - repl))) {
+                       *repl++ = '\r';
+               }
+
+               if(IS_SET(MODE_BRCKTPASTE))
+                       ttywrite("\033[200~", 6);
+               ttysend((char *)data, nitems * format / 8);
+               if(IS_SET(MODE_BRCKTPASTE))
+                       ttywrite("\033[201~", 6);
+               XFree(data);
+               /* number of 32-bit chunks returned */
+               ofs += nitems * format / 32;
+       } while(rem > 0);
+}
+
+void
+selpaste(const Arg *dummy) {
+       XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
+                       xw.win, CurrentTime);
+}
+
+void
+clippaste(const Arg *dummy) {
+       Atom clipboard;
+
+       clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+       XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
+                       xw.win, CurrentTime);
+}
+
+void
+selclear(XEvent *e) {
+       if(sel.ob.x == -1)
+               return;
+       sel.ob.x = -1;
+       tsetdirt(sel.nb.y, sel.ne.y);
+}
+
+void
+selrequest(XEvent *e) {
+       XSelectionRequestEvent *xsre;
+       XSelectionEvent xev;
+       Atom xa_targets, string;
+
+       xsre = (XSelectionRequestEvent *) e;
+       xev.type = SelectionNotify;
+       xev.requestor = xsre->requestor;
+       xev.selection = xsre->selection;
+       xev.target = xsre->target;
+       xev.time = xsre->time;
+       /* reject */
+       xev.property = None;
+
+       xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
+       if(xsre->target == xa_targets) {
+               /* respond with the supported type */
+               string = sel.xtarget;
+               XChangeProperty(xsre->display, xsre->requestor, xsre->property,
+                               XA_ATOM, 32, PropModeReplace,
+                               (uchar *) &string, 1);
+               xev.property = xsre->property;
+       } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
+               XChangeProperty(xsre->display, xsre->requestor, xsre->property,
+                               xsre->target, 8, PropModeReplace,
+                               (uchar *) sel.clip, strlen(sel.clip));
+               xev.property = xsre->property;
+       }
+
+       /* all done, send a notification to the listener */
+       if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
+               fprintf(stderr, "Error sending SelectionNotify event\n");
+}
+
+void
+xsetsel(char *str) {
+       /* register the selection for both the clipboard and the primary */
+       Atom clipboard;
+
+       free(sel.clip);
+       sel.clip = str;
+
+       XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
+
+       clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+       XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
+}
+
+void
+brelease(XEvent *e) {
+       if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
+               mousereport(e);
+               return;
+       }
+
+       if(e->xbutton.button == Button2) {
+               selpaste(NULL);
+       } else if(e->xbutton.button == Button1) {
+               if(sel.mode < 2) {
+                       selclear(NULL);
+               } else {
+                       getbuttoninfo(e);
+                       selcopy();
+               }
+               sel.mode = 0;
+               tsetdirt(sel.nb.y, sel.ne.y);
+       }
+}
+
+void
+bmotion(XEvent *e) {
+       int oldey, oldex, oldsby, oldsey;
+
+       if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
+               mousereport(e);
+               return;
+       }
+
+       if(!sel.mode)
+               return;
+
+       sel.mode++;
+       oldey = sel.oe.y;
+       oldex = sel.oe.x;
+       oldsby = sel.nb.y;
+       oldsey = sel.ne.y;
+       getbuttoninfo(e);
+
+       if(oldey != sel.oe.y || oldex != sel.oe.x)
+               tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
+}

 
 void
 die(const char *errstr, ...) {
 
 void
 die(const char *errstr, ...) {


@@ -22,48 +1141,62 @@ die(const char *errstr, ...) {
 
 void
 execsh(void) {
 
 void
 execsh(void) {

-       char *args[3] = {SHELL, "-i", NULL};
-       putenv("TERM=" TNAME);
-       execvp(SHELL, args);
-}
+       char **args;
+       char *envshell = getenv("SHELL");
+       const struct passwd *pass = getpwuid(getuid());
+       char buf[sizeof(long) * 8 + 1];
+
+       unsetenv("COLUMNS");
+       unsetenv("LINES");
+       unsetenv("TERMCAP");
+
+       if(pass) {
+               setenv("LOGNAME", pass->pw_name, 1);
+               setenv("USER", pass->pw_name, 1);
+               setenv("SHELL", pass->pw_shell, 0);
+               setenv("HOME", pass->pw_dir, 0);
+       }

 
 

-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);
+       snprintf(buf, sizeof(buf), "%lu", xw.win);
+       setenv("WINDOWID", buf, 1);
+
+       signal(SIGCHLD, SIG_DFL);
+       signal(SIGHUP, SIG_DFL);
+       signal(SIGINT, SIG_DFL);
+       signal(SIGQUIT, SIG_DFL);
+       signal(SIGTERM, SIG_DFL);
+       signal(SIGALRM, SIG_DFL);
+
+       DEFAULT(envshell, shell);
+       setenv("TERM", termname, 1);
+       args = opt_cmd ? opt_cmd : (char *[]){envshell, "-i", NULL};
+       execvp(args[0], args);
+       exit(EXIT_FAILURE);

 }
 
 }
 

-void 
+void

 sigchld(int a) {
        int stat = 0;
 sigchld(int a) {
        int stat = 0;

+

        if(waitpid(pid, &stat, 0) < 0)
        if(waitpid(pid, &stat, 0) < 0)

-               die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
-       if(WIFEXITED(stat))
+               die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
+
+       if(WIFEXITED(stat)) {

                exit(WEXITSTATUS(stat));
                exit(WEXITSTATUS(stat));

-       else
+       } else {

                exit(EXIT_FAILURE);
                exit(EXIT_FAILURE);

+       }

 }
 
 }
 

-

 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);
+       struct winsize w = {term.row, term.col, 0, 0};
+
+       /* seems to work fine on linux, openbsd and freebsd */
+       if(openpty(&m, &s, NULL, NULL, &w) < 0)
+               die("openpty failed: %s\n", strerror(errno));
+

        switch(pid = fork()) {
        case -1:
                die("fork failed\n");
        switch(pid = fork()) {
        case -1:
                die("fork failed\n");


@@ -74,880 +1207,2704 @@ 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", strerror(errno));
+               close(s);
+               close(m);

                execsh();
                break;
        default:
                close(s);
                cmdfd = m;
                signal(SIGCHLD, sigchld);
                execsh();
                break;
        default:
                close(s);
                cmdfd = m;
                signal(SIGCHLD, sigchld);

+               if(opt_io) {
+                       term.mode |= MODE_PRINT;
+                       iofd = (!strcmp(opt_io, "-")) ?
+                                 STDOUT_FILENO :
+                                 open(opt_io, O_WRONLY | O_CREAT, 0666);
+                       if(iofd < 0) {
+                               fprintf(stderr, "Error opening %s:%s\n",
+                                       opt_io, strerror(errno));
+                       }
+               }
+               break;

        }
 }
 
        }
 }
 

-void
-dump(char c) {
-       static int col;
-       fprintf(stderr, " %02x %c ", c, isprint(c)?c:'.');
-       if(++col % 10 == 0)
-               fprintf(stderr, "\n");
-}
-

 void
 ttyread(void) {
 void
 ttyread(void) {

-       char buf[BUFSIZ] = {0};
+       static char buf[BUFSIZ];
+       static int buflen = 0;
+       char *ptr;
+       char s[UTF_SIZ];
+       int charsize; /* size of utf8 char in bytes */
+       long unicodep;

        int ret;
 
        int ret;
 

-       switch(ret = read(cmdfd, buf, BUFSIZ)) {
-       case -1: 
-               die("Couldn't read from shell: %s\n", SERRNO);
-               break;
-       default:
-               tputs(buf, ret);
+       /* append read bytes to unprocessed bytes */
+       if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
+               die("Couldn't read from shell: %s\n", strerror(errno));
+
+       /* process every complete utf8 char */
+       buflen += ret;
+       ptr = buf;
+       while((charsize = utf8decode(ptr, &unicodep, buflen))) {
+               utf8encode(unicodep, s, UTF_SIZ);
+               tputc(s, charsize);
+               ptr += charsize;
+               buflen -= charsize;

        }
        }

+
+       /* keep any uncomplete utf8 char for the next call */
+       memmove(buf, ptr, buflen);
+}
+
+void
+ttywrite(const char *s, size_t n) {
+       if(xwrite(cmdfd, s, n) == -1)
+               die("write error on tty: %s\n", strerror(errno));

 }
 
 void
 }
 
 void

-ttywrite(char *s, size_t n) {
-       if(write(cmdfd, s, n) == -1)
-               die("write error on tty: %s\n", SERRNO);
+ttysend(char *s, size_t n) {
+       ttywrite(s, n);
+       if(IS_SET(MODE_ECHO))
+               techo(s, n);

 }
 
 void
 }
 
 void

-ttyresize(int x, int y) {
+ttyresize(void) {

        struct winsize w;
 
        w.ws_row = term.row;
        w.ws_col = term.col;
        struct winsize w;
 
        w.ws_row = term.row;
        w.ws_col = term.col;

-       w.ws_xpixel = w.ws_ypixel = 0;
+       w.ws_xpixel = xw.tw;
+       w.ws_ypixel = xw.th;

        if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
        if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)

-               fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
+               fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));

 }
 
 int
 }
 
 int

-escfinal(char c) {
-       if(escseq.len == 1)
-               switch(c) {
-               case '[':
-               case ']':
-               case '(':
-                       return 0;
-               case '=':
-               case '>':
-               default:
-                       return 1;
+tattrset(int attr) {
+       int i, j;
+
+       for(i = 0; i < term.row-1; i++) {
+               for(j = 0; j < term.col-1; j++) {
+                       if(term.line[i][j].mode & attr)
+                               return 1;

                }
                }

-       else if(BETWEEN(c, 0x40, 0x7E))
-               return 1;
-       return 0;         
+       }
+
+       return 0;
+}
+
+void
+tsetdirt(int top, int bot) {
+       int i;
+
+       LIMIT(top, 0, term.row-1);
+       LIMIT(bot, 0, term.row-1);
+
+       for(i = top; i <= bot; i++)
+               term.dirty[i] = 1;

 }
 
 void
 }
 
 void

-tcpos(int mode) {
-       static int x = 0;
-       static int y = 0;
+tsetdirtattr(int attr) {
+       int i, j;

 
 

-       if(mode == CSsave)
-               x = term.c.x, y = term.c.y;
-       else if(mode == CSload)
-               tmoveto(x, y);
+       for(i = 0; i < term.row-1; i++) {
+               for(j = 0; j < term.col-1; j++) {
+                       if(term.line[i][j].mode & attr) {
+                               tsetdirt(i, i);
+                               break;
+                       }
+               }
+       }

 }
 
 void
 }
 
 void

-tnew(int col, int row) {   /* screen size */
-       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));
+tfulldirt(void) {
+       tsetdirt(0, term.row-1);

 }
 
 void
 }
 
 void

-tscroll(void) {
-       Line temp = term.line[term.top];
-       int i;
+tcursor(int mode) {
+       static TCursor c[2];
+       bool alt = IS_SET(MODE_ALTSCREEN);
+
+       if(mode == CURSOR_SAVE) {
+               c[alt] = term.c;
+       } else if(mode == CURSOR_LOAD) {
+               term.c = c[alt];
+               tmoveto(c[alt].x, c[alt].y);
+       }
+}

 
 

-       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
+treset(void) {
+       uint i;
+
+       term.c = (TCursor){{
+               .mode = ATTR_NULL,
+               .fg = defaultfg,
+               .bg = defaultbg
+       }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
+
+       memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+       for(i = tabspaces; i < term.col; i += tabspaces)
+               term.tabs[i] = 1;
+       term.top = 0;
+       term.bot = term.row - 1;
+       term.mode = MODE_WRAP;
+       memset(term.trantbl, sizeof(term.trantbl), CS_USA);
+       term.charset = 0;
+
+       tclearregion(0, 0, term.col-1, term.row-1);
+       tmoveto(0, 0);
+       tcursor(CURSOR_SAVE);

 }
 
 void
 }
 
 void

-tnewline(void) {
-       int y = term.c.y + 1;
+tnew(int col, int row) {
+       term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
+       tresize(col, row);
+       term.numlock = 1;

 
 

-       if(y > term.bot) {
-               tscroll(), y = term.bot;
-       }
-       tmoveto(0, y);
+       treset();

 }
 
 }
 

-int
-escaddc(char c) {
-       escseq.buf[escseq.len++] = c;
-       if(escfinal(c) || escseq.len >= ESCSIZ) {
-               escparse(), eschandle();
-               return 0;
+void
+tswapscreen(void) {
+       Line *tmp = term.line;
+
+       term.line = term.alt;
+       term.alt = tmp;
+       term.mode ^= MODE_ALTSCREEN;
+       tfulldirt();
+}
+
+void
+tscrolldown(int orig, int n) {
+       int i;
+       Line temp;
+
+       LIMIT(n, 0, term.bot-orig+1);
+
+       tsetdirt(orig, term.bot-n);
+       tclearregion(0, term.bot-n+1, term.col-1, term.bot);
+
+       for(i = term.bot; i >= orig+n; i--) {
+               temp = term.line[i];
+               term.line[i] = term.line[i-n];
+               term.line[i-n] = temp;

        }
        }

-       return 1;
+
+       selscroll(orig, n);

 }
 
 void
 }
 
 void

-escparse(void) {
-       /* int noarg = 1; */
-       char *p = escseq.buf;
+tscrollup(int orig, int n) {
+       int i;
+       Line temp;
+
+       LIMIT(n, 0, term.bot-orig+1);
+
+       tclearregion(0, orig, term.col-1, orig+n-1);
+       tsetdirt(orig+n, term.bot);

 
 

-       escseq.narg = 0;
-       switch(escseq.pre = *p++) {
-       case '[': /* CSI */
-               if(*p == '?')
-                       escseq.priv = 1, p++;
+       for(i = orig; i <= term.bot-n; i++) {
+               temp = term.line[i];
+               term.line[i] = term.line[i+n];
+               term.line[i+n] = temp;
+       }
+
+       selscroll(orig, -n);
+}

 
 

-               while(p < escseq.buf+escseq.len) {
-                       while(isdigit(*p)) {
-                               escseq.arg[escseq.narg] *= 10;
-                               escseq.arg[escseq.narg] += *(p++) - '0'/*, noarg = 0 */;
+void
+selscroll(int orig, int n) {
+       if(sel.ob.x == -1)
+               return;
+
+       if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
+               if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
+                       selclear(NULL);
+                       return;
+               }
+               if(sel.type == SEL_RECTANGULAR) {
+                       if(sel.ob.y < term.top)
+                               sel.ob.y = term.top;
+                       if(sel.oe.y > term.bot)
+                               sel.oe.y = term.bot;
+               } else {
+                       if(sel.ob.y < term.top) {
+                               sel.ob.y = term.top;
+                               sel.ob.x = 0;

                        }
                        }

-                       if(*p == ';')
-                               escseq.narg++, p++;
-                       else {
-                               escseq.mode = *p;
-                               escseq.narg++;
-                               return;
+                       if(sel.oe.y > term.bot) {
+                               sel.oe.y = term.bot;
+                               sel.oe.x = term.col;

                        }
                }
                        }
                }

-               break;
-       case '(':
-               /* XXX: graphic character set */
-               break;
+               selnormalize();

        }
 }
 
 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(int first_col) {
+       int y = term.c.y;
+
+       if(y == term.bot) {
+               tscrollup(term.top, 1);
+       } else {
+               y++;
+       }
+       tmoveto(first_col ? 0 : term.c.x, y);

 }
 
 void
 }
 
 void

-tcursor(int dir) {
-       int xf = term.c.x, yf = term.c.y;
+csiparse(void) {
+       char *p = csiescseq.buf, *np;
+       long int v;
+
+       csiescseq.narg = 0;
+       if(*p == '?') {
+               csiescseq.priv = 1;
+               p++;
+       }

 
 

-       switch(dir) {
-       case CSup:
-               yf--;
-               break;
-       case CSdown:
-               yf++;
+       csiescseq.buf[csiescseq.len] = '\0';
+       while(p < csiescseq.buf+csiescseq.len) {
+               np = NULL;
+               v = strtol(p, &np, 10);
+               if(np == p)
+                       v = 0;
+               if(v == LONG_MAX || v == LONG_MIN)
+                       v = -1;
+               csiescseq.arg[csiescseq.narg++] = v;
+               p = np;
+               if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
+                       break;
+               p++;
+       }
+       csiescseq.mode = *p;
+}
+
+/* for absolute user moves, when decom is set */
+void
+tmoveato(int x, int y) {
+       tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
+}
+
+void
+tmoveto(int x, int y) {
+       int miny, maxy;
+
+       if(term.c.state & CURSOR_ORIGIN) {
+               miny = term.top;
+               maxy = term.bot;
+       } else {
+               miny = 0;
+               maxy = term.row - 1;
+       }
+       LIMIT(x, 0, term.col-1);
+       LIMIT(y, miny, maxy);
+       term.c.state &= ~CURSOR_WRAPNEXT;
+       term.c.x = x;
+       term.c.y = y;
+}
+
+void
+tsetchar(char *c, Glyph *attr, int x, int y) {
+       static char *vt100_0[62] = { /* 0x41 - 0x7e */
+               "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
+               0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
+               0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
+               0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
+               "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
+               "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
+               "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
+               "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
+       };
+
+       /*
+        * The table is proudly stolen from rxvt.
+        */
+       if(term.trantbl[term.charset] == CS_GRAPHIC0) {
+               if(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
+                       c = vt100_0[c[0] - 0x41];
+               }
+       }
+
+       if(term.line[y][x].mode & ATTR_WIDE) {
+               if(x+1 < term.col) {
+                       term.line[y][x+1].c[0] = ' ';
+                       term.line[y][x+1].mode &= ~ATTR_WDUMMY;
+               }
+       } else if(term.line[y][x].mode & ATTR_WDUMMY) {
+               term.line[y][x-1].c[0] = ' ';
+               term.line[y][x-1].mode &= ~ATTR_WIDE;
+       }
+
+       term.dirty[y] = 1;
+       term.line[y][x] = *attr;
+       memcpy(term.line[y][x].c, c, UTF_SIZ);
+}
+
+void
+tclearregion(int x1, int y1, int x2, int y2) {
+       int x, 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);
+
+       for(y = y1; y <= y2; y++) {
+               term.dirty[y] = 1;
+               for(x = x1; x <= x2; x++) {
+                       if(selected(x, y))
+                               selclear(NULL);
+                       term.line[y][x] = term.c.attr;
+                       memcpy(term.line[y][x].c, " ", 2);
+               }
+       }
+}
+
+void
+tdeletechar(int n) {
+       int dst, src, size;
+       Glyph *line;
+
+       LIMIT(n, 0, term.col - term.c.x);
+
+       dst = term.c.x;
+       src = term.c.x + n;
+       size = term.col - src;
+       line = term.line[term.c.y];
+
+       memmove(&line[dst], &line[src], size * sizeof(Glyph));
+       tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
+}
+
+void
+tinsertblank(int n) {
+       int dst, src, size;
+       Glyph *line;
+
+       LIMIT(n, 0, term.col - term.c.x);
+
+       dst = term.c.x + n;
+       src = term.c.x;
+       size = term.col - dst;
+       line = term.line[term.c.y];
+
+       memmove(&line[dst], &line[src], size * sizeof(Glyph));
+       tclearregion(src, term.c.y, dst - 1, term.c.y);
+}
+
+void
+tinsertblankline(int n) {
+       if(BETWEEN(term.c.y, term.top, term.bot))
+               tscrolldown(term.c.y, n);
+}
+
+void
+tdeleteline(int n) {
+       if(BETWEEN(term.c.y, term.top, term.bot))
+               tscrollup(term.c.y, n);
+}
+
+int32_t
+tdefcolor(int *attr, int *npar, int l) {
+       int32_t idx = -1;
+       uint r, g, b;
+
+       switch (attr[*npar + 1]) {
+       case 2: /* direct color in RGB space */
+               if (*npar + 4 >= l) {
+                       fprintf(stderr,
+                               "erresc(38): Incorrect number of parameters (%d)\n",
+                               *npar);
+                       break;
+               }
+               r = attr[*npar + 2];
+               g = attr[*npar + 3];
+               b = attr[*npar + 4];
+               *npar += 4;
+               if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
+                       fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
+                               r, g, b);
+               else
+                       idx = TRUECOLOR(r, g, b);
+               break;
+       case 5: /* indexed color */
+               if (*npar + 2 >= l) {
+                       fprintf(stderr,
+                               "erresc(38): Incorrect number of parameters (%d)\n",
+                               *npar);
+                       break;
+               }
+               *npar += 2;
+               if(!BETWEEN(attr[*npar], 0, 255))
+                       fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
+               else
+                       idx = attr[*npar];
+               break;
+       case 0: /* implemented defined (only foreground) */
+       case 1: /* transparent */
+       case 3: /* direct color in CMY space */
+       case 4: /* direct color in CMYK space */
+       default:
+               fprintf(stderr,
+                       "erresc(38): gfx attr %d unknown\n", attr[*npar]);
+               break;
+       }
+
+       return idx;
+}
+
+void
+tsetattr(int *attr, int l) {
+       int i;
+       int32_t idx;
+
+       for(i = 0; i < l; i++) {
+               switch(attr[i]) {
+               case 0:
+                       term.c.attr.mode &= ~(
+                               ATTR_BOLD       |
+                               ATTR_FAINT      |
+                               ATTR_ITALIC     |
+                               ATTR_UNDERLINE  |
+                               ATTR_BLINK      |
+                               ATTR_FASTBLINK  |
+                               ATTR_REVERSE    |
+                               ATTR_INVISIBLE  |
+                               ATTR_STRUCK     );
+                       term.c.attr.fg = defaultfg;
+                       term.c.attr.bg = defaultbg;
+                       break;
+               case 1:
+                       term.c.attr.mode |= ATTR_BOLD;
+                       break;
+               case 2:
+                       term.c.attr.mode |= ATTR_FAINT;
+                       break;
+               case 3:
+                       term.c.attr.mode |= ATTR_ITALIC;
+                       break;
+               case 4:
+                       term.c.attr.mode |= ATTR_UNDERLINE;
+                       break;
+               case 5: /* slow blink */
+                       term.c.attr.mode |= ATTR_BLINK;
+                       break;
+               case 6: /* rapid blink */
+                       term.c.attr.mode |= ATTR_FASTBLINK;
+                       break;
+               case 7:
+                       term.c.attr.mode |= ATTR_REVERSE;
+                       break;
+               case 8:
+                       term.c.attr.mode |= ATTR_INVISIBLE;
+                       break;
+               case 9:
+                       term.c.attr.mode |= ATTR_STRUCK;
+                       break;
+               case 21:
+                       term.c.attr.mode &= ~ATTR_BOLD;
+                       break;
+               case 22:
+                       term.c.attr.mode &= ~ATTR_FAINT;
+                       break;
+               case 23:
+                       term.c.attr.mode &= ~ATTR_ITALIC;
+                       break;
+               case 24:
+                       term.c.attr.mode &= ~ATTR_UNDERLINE;
+                       break;
+               case 25:
+                       term.c.attr.mode &= ~ATTR_BLINK;
+                       break;
+               case 26:
+                       term.c.attr.mode &= ~ATTR_FASTBLINK;
+                       break;
+               case 27:
+                       term.c.attr.mode &= ~ATTR_REVERSE;
+                       break;
+               case 28:
+                       term.c.attr.mode &= ~ATTR_INVISIBLE;
+                       break;
+               case 29:
+                       term.c.attr.mode &= ~ATTR_STRUCK;
+                       break;
+               case 38:
+                       if ((idx = tdefcolor(attr, &i, l)) >= 0)
+                               term.c.attr.fg = idx;
+                       break;
+               case 39:
+                       term.c.attr.fg = defaultfg;
+                       break;
+               case 48:
+                       if ((idx = tdefcolor(attr, &i, l)) >= 0)
+                               term.c.attr.bg = idx;
+                       break;
+               case 49:
+                       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;
+                       } 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.bg = attr[i] - 100 + 8;
+                       } else {
+                               fprintf(stderr,
+                                       "erresc(default): gfx attr %d unknown\n",
+                                       attr[i]), csidump();
+                       }
+                       break;
+               }
+       }
+}
+
+void
+tsetscroll(int t, int b) {
+       int temp;
+
+       LIMIT(t, 0, term.row-1);
+       LIMIT(b, 0, term.row-1);
+       if(t > b) {
+               temp = t;
+               t = b;
+               b = temp;
+       }
+       term.top = t;
+       term.bot = b;
+}
+
+void
+tsetmode(bool priv, bool set, int *args, int narg) {
+       int *lim, mode;
+       bool alt;
+
+       for(lim = args + narg; args < lim; ++args) {
+               if(priv) {
+                       switch(*args) {
+                       case 1: /* DECCKM -- Cursor key */
+                               MODBIT(term.mode, set, MODE_APPCURSOR);
+                               break;
+                       case 5: /* DECSCNM -- Reverse video */
+                               mode = term.mode;
+                               MODBIT(term.mode, set, MODE_REVERSE);
+                               if(mode != term.mode)
+                                       redraw(REDRAW_TIMEOUT);
+                               break;
+                       case 6: /* DECOM -- Origin */
+                               MODBIT(term.c.state, set, CURSOR_ORIGIN);
+                               tmoveato(0, 0);
+                               break;
+                       case 7: /* DECAWM -- Auto wrap */
+                               MODBIT(term.mode, set, MODE_WRAP);
+                               break;
+                       case 0:  /* Error (IGNORED) */
+                       case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
+                       case 3:  /* DECCOLM -- Column  (IGNORED) */
+                       case 4:  /* DECSCLM -- Scroll (IGNORED) */
+                       case 8:  /* DECARM -- Auto repeat (IGNORED) */
+                       case 18: /* DECPFF -- Printer feed (IGNORED) */
+                       case 19: /* DECPEX -- Printer extent (IGNORED) */
+                       case 42: /* DECNRCM -- National characters (IGNORED) */
+                       case 12: /* att610 -- Start blinking cursor (IGNORED) */
+                               break;
+                       case 25: /* DECTCEM -- Text Cursor Enable Mode */
+                               MODBIT(term.mode, !set, MODE_HIDE);
+                               break;
+                       case 9:    /* X10 mouse compatibility mode */
+                               xsetpointermotion(0);
+                               MODBIT(term.mode, 0, MODE_MOUSE);
+                               MODBIT(term.mode, set, MODE_MOUSEX10);
+                               break;
+                       case 1000: /* 1000: report button press */
+                               xsetpointermotion(0);
+                               MODBIT(term.mode, 0, MODE_MOUSE);
+                               MODBIT(term.mode, set, MODE_MOUSEBTN);
+                               break;
+                       case 1002: /* 1002: report motion on button press */
+                               xsetpointermotion(0);
+                               MODBIT(term.mode, 0, MODE_MOUSE);
+                               MODBIT(term.mode, set, MODE_MOUSEMOTION);
+                               break;
+                       case 1003: /* 1003: enable all mouse motions */
+                               xsetpointermotion(set);
+                               MODBIT(term.mode, 0, MODE_MOUSE);
+                               MODBIT(term.mode, set, MODE_MOUSEMANY);
+                               break;
+                       case 1004: /* 1004: send focus events to tty */
+                               MODBIT(term.mode, set, MODE_FOCUS);
+                               break;
+                       case 1006: /* 1006: extended reporting mode */
+                               MODBIT(term.mode, set, MODE_MOUSESGR);
+                               break;
+                       case 1034:
+                               MODBIT(term.mode, set, MODE_8BIT);
+                               break;
+                       case 1049: /* swap screen & set/restore cursor as xterm */
+                               if (!allowaltscreen)
+                                       break;
+                               tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
+                               /* FALLTHROUGH */
+                       case 47: /* swap screen */
+                       case 1047:
+                               if (!allowaltscreen)
+                                       break;
+                               alt = IS_SET(MODE_ALTSCREEN);
+                               if(alt) {
+                                       tclearregion(0, 0, term.col-1,
+                                                       term.row-1);
+                               }
+                               if(set ^ alt) /* set is always 1 or 0 */
+                                       tswapscreen();
+                               if(*args != 1049)
+                                       break;
+                               /* FALLTHROUGH */
+                       case 1048:
+                               tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
+                               break;
+                       case 2004: /* 2004: bracketed paste mode */
+                               MODBIT(term.mode, set, MODE_BRCKTPASTE);
+                               break;
+                       /* Not implemented mouse modes. See comments there. */
+                       case 1001: /* mouse highlight mode; can hang the
+                                     terminal by design when implemented. */
+                       case 1005: /* UTF-8 mouse mode; will confuse
+                                     applications not supporting UTF-8
+                                     and luit. */
+                       case 1015: /* urxvt mangled mouse mode; incompatible
+                                     and can be mistaken for other control
+                                     codes. */
+                       default:
+                               fprintf(stderr,
+                                       "erresc: unknown private set/reset mode %d\n",
+                                       *args);
+                               break;
+                       }
+               } else {
+                       switch(*args) {
+                       case 0:  /* Error (IGNORED) */
+                               break;
+                       case 2:  /* KAM -- keyboard action */
+                               MODBIT(term.mode, set, MODE_KBDLOCK);
+                               break;
+                       case 4:  /* IRM -- Insertion-replacement */
+                               MODBIT(term.mode, set, MODE_INSERT);
+                               break;
+                       case 12: /* SRM -- Send/Receive */
+                               MODBIT(term.mode, !set, MODE_ECHO);
+                               break;
+                       case 20: /* LNM -- Linefeed/new line */
+                               MODBIT(term.mode, set, MODE_CRLF);
+                               break;
+                       default:
+                               fprintf(stderr,
+                                       "erresc: unknown set/reset mode %d\n",
+                                       *args);
+                               break;
+                       }
+               }
+       }
+}
+
+void
+csihandle(void) {
+       char buf[40];
+       int len;
+
+       switch(csiescseq.mode) {
+       default:
+       unknown:
+               fprintf(stderr, "erresc: unknown csi ");
+               csidump();
+               /* die(""); */
+               break;
+       case '@': /* ICH -- Insert <n> blank char */
+               DEFAULT(csiescseq.arg[0], 1);
+               tinsertblank(csiescseq.arg[0]);
+               break;
+       case 'A': /* CUU -- Cursor <n> Up */
+               DEFAULT(csiescseq.arg[0], 1);
+               tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
+               break;
+       case 'B': /* CUD -- Cursor <n> Down */
+       case 'e': /* VPR --Cursor <n> Down */
+               DEFAULT(csiescseq.arg[0], 1);
+               tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
+               break;
+       case 'i': /* MC -- Media Copy */
+               switch(csiescseq.arg[0]) {
+               case 0:
+                       tdump();
+                       break;
+               case 1:
+                       tdumpline(term.c.y);
+                       break;
+               case 2:
+                       tdumpsel();
+                       break;
+               case 4:
+                       term.mode &= ~MODE_PRINT;
+                       break;
+               case 5:
+                       term.mode |= MODE_PRINT;
+                       break;
+               }
+               break;
+       case 'c': /* DA -- Device Attributes */
+               if(csiescseq.arg[0] == 0)
+                       ttywrite(VT102ID, sizeof(VT102ID) - 1);
+               break;
+       case 'C': /* CUF -- Cursor <n> Forward */
+       case 'a': /* HPR -- Cursor <n> Forward */
+               DEFAULT(csiescseq.arg[0], 1);
+               tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
+               break;
+       case 'D': /* CUB -- Cursor <n> Backward */
+               DEFAULT(csiescseq.arg[0], 1);
+               tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
+               break;
+       case 'E': /* CNL -- Cursor <n> Down and first col */
+               DEFAULT(csiescseq.arg[0], 1);
+               tmoveto(0, term.c.y+csiescseq.arg[0]);
+               break;
+       case 'F': /* CPL -- Cursor <n> Up and first col */
+               DEFAULT(csiescseq.arg[0], 1);
+               tmoveto(0, term.c.y-csiescseq.arg[0]);
+               break;
+       case 'g': /* TBC -- Tabulation clear */
+               switch(csiescseq.arg[0]) {
+               case 0: /* clear current tab stop */
+                       term.tabs[term.c.x] = 0;
+                       break;
+               case 3: /* clear all the tabs */
+                       memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+                       break;
+               default:
+                       goto unknown;
+               }
+               break;
+       case 'G': /* CHA -- Move to <col> */
+       case '`': /* HPA */
+               DEFAULT(csiescseq.arg[0], 1);
+               tmoveto(csiescseq.arg[0]-1, term.c.y);
+               break;
+       case 'H': /* CUP -- Move to <row> <col> */
+       case 'f': /* HVP */
+               DEFAULT(csiescseq.arg[0], 1);
+               DEFAULT(csiescseq.arg[1], 1);
+               tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);

                break;
                break;

-       case CSleft:
-               xf--;
-               if(xf < 0) {
-                       xf = term.col-1, yf--;
-                       if(yf < term.top)
-                               yf = term.top, xf = 0;
+       case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
+               DEFAULT(csiescseq.arg[0], 1);
+               tputtab(csiescseq.arg[0]);
+               break;
+       case 'J': /* ED -- Clear screen */
+               selclear(NULL);
+               switch(csiescseq.arg[0]) {
+               case 0: /* below */
+                       tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+                       if(term.c.y < term.row-1) {
+                               tclearregion(0, term.c.y+1, term.col-1,
+                                               term.row-1);
+                       }
+                       break;
+               case 1: /* above */
+                       if(term.c.y > 1)
+                               tclearregion(0, 0, term.col-1, term.c.y-1);
+                       tclearregion(0, term.c.y, term.c.x, term.c.y);
+                       break;
+               case 2: /* all */
+                       tclearregion(0, 0, term.col-1, term.row-1);
+                       break;
+               default:
+                       goto unknown;
+               }
+               break;
+       case 'K': /* EL -- Clear line */
+               switch(csiescseq.arg[0]) {
+               case 0: /* right */
+                       tclearregion(term.c.x, term.c.y, term.col-1,
+                                       term.c.y);
+                       break;
+               case 1: /* left */
+                       tclearregion(0, term.c.y, term.c.x, term.c.y);
+                       break;
+               case 2: /* all */
+                       tclearregion(0, term.c.y, term.col-1, term.c.y);
+                       break;

                }
                break;
                }
                break;

-       case CSright:
-               xf++;
-               if(xf >= term.col) {
-                       xf = 0, yf++;
-                       if(yf > term.bot)
-                               yf = term.bot, tscroll();
+       case 'S': /* SU -- Scroll <n> line up */
+               DEFAULT(csiescseq.arg[0], 1);
+               tscrollup(term.top, csiescseq.arg[0]);
+               break;
+       case 'T': /* SD -- Scroll <n> line down */
+               DEFAULT(csiescseq.arg[0], 1);
+               tscrolldown(term.top, csiescseq.arg[0]);
+               break;
+       case 'L': /* IL -- Insert <n> blank lines */
+               DEFAULT(csiescseq.arg[0], 1);
+               tinsertblankline(csiescseq.arg[0]);
+               break;
+       case 'l': /* RM -- Reset Mode */
+               tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
+               break;
+       case 'M': /* DL -- Delete <n> lines */
+               DEFAULT(csiescseq.arg[0], 1);
+               tdeleteline(csiescseq.arg[0]);
+               break;
+       case 'X': /* ECH -- Erase <n> char */
+               DEFAULT(csiescseq.arg[0], 1);
+               tclearregion(term.c.x, term.c.y,
+                               term.c.x + csiescseq.arg[0] - 1, term.c.y);
+               break;
+       case 'P': /* DCH -- Delete <n> char */
+               DEFAULT(csiescseq.arg[0], 1);
+               tdeletechar(csiescseq.arg[0]);
+               break;
+       case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
+               DEFAULT(csiescseq.arg[0], 1);
+               tputtab(-csiescseq.arg[0]);
+               break;
+       case 'd': /* VPA -- Move to <row> */
+               DEFAULT(csiescseq.arg[0], 1);
+               tmoveato(term.c.x, csiescseq.arg[0]-1);
+               break;
+       case 'h': /* SM -- Set terminal mode */
+               tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
+               break;
+       case 'm': /* SGR -- Terminal attribute (color) */
+               tsetattr(csiescseq.arg, csiescseq.narg);
+               break;
+       case 'n': /* DSR – Device Status Report (cursor position) */
+               if (csiescseq.arg[0] == 6) {
+                       len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
+                                       term.c.y+1, term.c.x+1);
+                       ttywrite(buf, len);
+               }
+               break;
+       case 'r': /* DECSTBM -- Set Scrolling Region */
+               if(csiescseq.priv) {
+                       goto unknown;
+               } else {
+                       DEFAULT(csiescseq.arg[0], 1);
+                       DEFAULT(csiescseq.arg[1], term.row);
+                       tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
+                       tmoveato(0, 0);
+               }
+               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
+csidump(void) {
+       int i;
+       uint c;
+
+       printf("ESC[");
+       for(i = 0; i < csiescseq.len; i++) {
+               c = csiescseq.buf[i] & 0xff;
+               if(isprint(c)) {
+                       putchar(c);
+               } else if(c == '\n') {
+                       printf("(\\n)");
+               } else if(c == '\r') {
+                       printf("(\\r)");
+               } else if(c == 0x1b) {
+                       printf("(\\e)");
+               } else {
+                       printf("(%02x)", c);
+               }
+       }
+       putchar('\n');
+}
+
+void
+csireset(void) {
+       memset(&csiescseq, 0, sizeof(csiescseq));
+}
+
+void
+strhandle(void) {
+       char *p = NULL;
+       int j, narg, par;
+
+       term.esc &= ~(ESC_STR_END|ESC_STR);
+       strparse();
+       narg = strescseq.narg;
+       par = atoi(strescseq.args[0]);
+
+       switch(strescseq.type) {
+       case ']': /* OSC -- Operating System Command */
+               switch(par) {
+               case 0:
+               case 1:
+               case 2:
+                       if(narg > 1)
+                               xsettitle(strescseq.args[1]);
+                       return;
+               case 4: /* color set */
+                       if(narg < 3)
+                               break;
+                       p = strescseq.args[2];
+                       /* FALLTHROUGH */
+               case 104: /* color reset, here p = NULL */
+                       j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
+                       if(xsetcolorname(j, p)) {
+                               fprintf(stderr, "erresc: invalid color %s\n", p);
+                       } else {
+                               /*
+                                * TODO if defaultbg color is changed, borders
+                                * are dirty
+                                */
+                               redraw(0);
+                       }
+                       return;
+               }
+               break;
+       case 'k': /* old title set compatibility */
+               xsettitle(strescseq.args[0]);
+               return;
+       case 'P': /* DCS -- Device Control String */
+       case '_': /* APC -- Application Program Command */
+       case '^': /* PM -- Privacy Message */
+               return;
+       }
+
+       fprintf(stderr, "erresc: unknown str ");
+       strdump();
+}
+
+void
+strparse(void) {
+       char *p = strescseq.buf;
+
+       strescseq.narg = 0;
+       strescseq.buf[strescseq.len] = '\0';
+       while(p && strescseq.narg < STR_ARG_SIZ)
+               strescseq.args[strescseq.narg++] = strsep(&p, ";");
+}
+
+void
+strdump(void) {
+       int i;
+       uint c;
+
+       printf("ESC%c", strescseq.type);
+       for(i = 0; i < strescseq.len; i++) {
+               c = strescseq.buf[i] & 0xff;
+               if(c == '\0') {
+                       return;
+               } else if(isprint(c)) {
+                       putchar(c);
+               } else if(c == '\n') {
+                       printf("(\\n)");
+               } else if(c == '\r') {
+                       printf("(\\r)");
+               } else if(c == 0x1b) {
+                       printf("(\\e)");
+               } else {
+                       printf("(%02x)", c);
+               }
+       }
+       printf("ESC\\\n");
+}
+
+void
+strreset(void) {
+       memset(&strescseq, 0, sizeof(strescseq));
+}
+
+void
+tprinter(char *s, size_t len) {
+       if(iofd != -1 && xwrite(iofd, s, len) < 0) {
+               fprintf(stderr, "Error writing in %s:%s\n",
+                       opt_io, strerror(errno));
+               close(iofd);
+               iofd = -1;
+       }
+}
+
+void
+toggleprinter(const Arg *arg) {
+       term.mode ^= MODE_PRINT;
+}
+
+void
+printscreen(const Arg *arg) {
+       tdump();
+}
+
+void
+printsel(const Arg *arg) {
+       tdumpsel();
+}
+
+void
+tdumpsel(void) {
+       char *ptr;
+
+       if((ptr = getsel())) {
+               tprinter(ptr, strlen(ptr));
+               free(ptr);
+       }
+}
+
+void
+tdumpline(int n) {
+       Glyph *bp, *end;
+
+       bp = &term.line[n][0];
+       end = &bp[MIN(tlinelen(n), term.col) - 1];
+       if(bp != end || bp->c[0] != ' ') {
+               for( ;bp <= end; ++bp)
+                       tprinter(bp->c, utf8len(bp->c));
+       }
+       tprinter("\n", 1);
+}
+
+void
+tdump(void) {
+       int i;
+
+       for(i = 0; i < term.row; ++i)
+               tdumpline(i);
+}
+
+void
+tputtab(int n) {
+       uint x = term.c.x;
+
+       if(n > 0) {
+               while(x < term.col && n--)
+                       for(++x; x < term.col && !term.tabs[x]; ++x)
+                               /* nothing */ ;
+       } else if(n < 0) {
+               while(x > 0 && n++)
+                       for(--x; x > 0 && !term.tabs[x]; --x)
+                               /* nothing */ ;
+       }
+       tmoveto(x, term.c.y);
+}
+
+void
+techo(char *buf, int len) {
+       for(; len > 0; buf++, len--) {
+               char c = *buf;
+
+               if(ISCONTROL(c)) { /* control code */
+                       if(c & 0x80) {
+                               c &= 0x7f;
+                               tputc("^", 1);
+                               tputc("[", 1);
+                       } else if(c != '\n' && c != '\r' && c != '\t') {
+                               c ^= '\x40';
+                               tputc("^", 1);
+                       }
+                       tputc(&c, 1);
+               } else {
+                       break;
+               }
+       }
+       if(len)
+               tputc(buf, len);
+}
+
+void
+tdeftran(char ascii) {
+       static char cs[] = "0B";
+       static int vcs[] = {CS_GRAPHIC0, CS_USA};
+       char *p;
+
+       if((p = strchr(cs, ascii)) == NULL) {
+               fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
+       } else {
+               term.trantbl[term.icharset] = vcs[p - cs];
+       }
+}
+
+void
+tcontrolcode(uchar ascii) {
+       static char question[UTF_SIZ] = "?";
+
+       switch(ascii) {
+       case '\t':   /* HT */
+               tputtab(1);
+               return;
+       case '\b':   /* BS */
+               tmoveto(term.c.x-1, term.c.y);
+               return;
+       case '\r':   /* CR */
+               tmoveto(0, term.c.y);
+               return;
+       case '\f':   /* LF */
+       case '\v':   /* VT */
+       case '\n':   /* LF */
+               /* go to first col if the mode is set */
+               tnewline(IS_SET(MODE_CRLF));
+               return;
+       case '\a':   /* BEL */
+               if(term.esc & ESC_STR_END) {
+                       /* backwards compatibility to xterm */
+                       strhandle();
+               } else {
+                       if(!(xw.state & WIN_FOCUSED))
+                               xseturgency(1);
+                       if (bellvolume)
+                               XBell(xw.dpy, bellvolume);

                }
                break;
                }
                break;

+       case '\033': /* ESC */
+               csireset();
+               term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
+               term.esc |= ESC_START;
+               return;
+       case '\016': /* SO */
+               term.charset = 0;
+               return;
+       case '\017': /* SI */
+               term.charset = 1;
+               return;
+       case '\032': /* SUB */
+               tsetchar(question, &term.c.attr, term.c.x, term.c.y);
+       case '\030': /* CAN */
+               csireset();
+               break;
+       case '\005': /* ENQ (IGNORED) */
+       case '\000': /* NUL (IGNORED) */
+       case '\021': /* XON (IGNORED) */
+       case '\023': /* XOFF (IGNORED) */
+       case 0177:   /* DEL (IGNORED) */
+               return;
+       case 0x84:   /* TODO: IND */
+       case 0x85:   /* TODO: NEL */
+       case 0x88:   /* TODO: HTS */
+       case 0x8d:   /* TODO: RI */
+       case 0x8e:   /* TODO: SS2 */
+       case 0x8f:   /* TODO: SS3 */
+       case 0x90:   /* TODO: DCS */
+       case 0x98:   /* TODO: SOS */
+       case 0x9a:   /* TODO: DECID */
+       case 0x9b:   /* TODO: CSI */
+       case 0x9c:   /* TODO: ST */
+       case 0x9d:   /* TODO: OSC */
+       case 0x9e:   /* TODO: PM */
+       case 0x9f:   /* TODO: APC */
+               break;
+       }
+       /* only CAN, SUB, \a and C1 chars interrupt a sequence */
+       term.esc &= ~(ESC_STR_END|ESC_STR);
+       return;
+}
+
+void
+tdectest(char c) {
+       static char E[UTF_SIZ] = "E";
+       int x, y;
+
+       if(c == '8') { /* DEC screen alignment test. */
+               for(x = 0; x < term.col; ++x) {
+                       for(y = 0; y < term.row; ++y)
+                               tsetchar(E, &term.c.attr, x, y);
+               }
+       }
+}
+
+void
+tputc(char *c, int len) {
+       uchar ascii;
+       bool control;
+       long unicodep;
+       int width;
+       Glyph *gp;
+
+       if(len == 1) {
+               width = 1;
+               unicodep = ascii = *c;
+       } else {
+               utf8decode(c, &unicodep, UTF_SIZ);
+               width = wcwidth(unicodep);
+               control = ISCONTROLC1(unicodep);
+               ascii = unicodep;
+       }
+
+       if(IS_SET(MODE_PRINT))
+               tprinter(c, len);
+       control = ISCONTROL(unicodep);
+
+       /*
+        * STR sequence must be checked before anything else
+        * because it uses all following characters until it
+        * receives a ESC, a SUB, a ST or any other C1 control
+        * character.
+        */
+       if(term.esc & ESC_STR) {
+               if(width == 1 &&
+                  (ascii == '\a' || ascii == 030 ||
+                   ascii == 032  || ascii == 033 ||
+                   ISCONTROLC1(unicodep))) {
+                       term.esc &= ~(ESC_START|ESC_STR);
+                       term.esc |= ESC_STR_END;
+               } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
+                       memmove(&strescseq.buf[strescseq.len], c, len);
+                       strescseq.len += len;
+                       return;
+               } else {
+               /*
+                * Here is a bug in terminals. If the user never sends
+                * some code to stop the str or esc command, then st
+                * will stop responding. But this is better than
+                * silently failing with unknown characters. At least
+                * then users will report back.
+                *
+                * In the case users ever get fixed, here is the code:
+                */
+               /*
+                * term.esc = 0;
+                * strhandle();
+                */
+                       return;
+               }
+       }
+
+       /*
+        * Actions of control codes must be performed as soon they arrive
+        * because they can be embedded inside a control sequence, and
+        * they must not cause conflicts with sequences.
+        */
+       if(control) {
+               tcontrolcode(ascii);
+               /*
+                * control codes are not shown ever
+                */
+               return;
+       } else if(term.esc & ESC_START) {
+               if(term.esc & ESC_CSI) {
+                       csiescseq.buf[csiescseq.len++] = ascii;
+                       if(BETWEEN(ascii, 0x40, 0x7E)
+                                       || csiescseq.len >= \
+                                       sizeof(csiescseq.buf)-1) {
+                               term.esc = 0;
+                               csiparse();
+                               csihandle();
+                       }
+                       return;
+               } else if(term.esc & ESC_ALTCHARSET) {
+                       tdeftran(ascii);
+               } else if(term.esc & ESC_TEST) {
+                       tdectest(ascii);
+               } else {
+                       switch(ascii) {
+                       case '[':
+                               term.esc |= ESC_CSI;
+                               return;
+                       case '#':
+                               term.esc |= ESC_TEST;
+                               return;
+                       case 'P': /* DCS -- Device Control String */
+                       case '_': /* APC -- Application Program Command */
+                       case '^': /* PM -- Privacy Message */
+                       case ']': /* OSC -- Operating System Command */
+                       case 'k': /* old title set compatibility */
+                               strreset();
+                               strescseq.type = ascii;
+                               term.esc |= ESC_STR;
+                               return;
+                       case '(': /* set primary charset G0 */
+                       case ')': /* set secondary charset G1 */
+                       case '*': /* set tertiary charset G2 */
+                       case '+': /* set quaternary charset G3 */
+                               term.icharset = ascii - '(';
+                               term.esc |= ESC_ALTCHARSET;
+                               return;
+                       case 'D': /* IND -- Linefeed */
+                               if(term.c.y == term.bot) {
+                                       tscrollup(term.top, 1);
+                               } else {
+                                       tmoveto(term.c.x, term.c.y+1);
+                               }
+                               break;
+                       case 'E': /* NEL -- Next line */
+                               tnewline(1); /* always go to first col */
+                               break;
+                       case 'H': /* HTS -- Horizontal tab stop */
+                               term.tabs[term.c.x] = 1;
+                               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);
+                               }
+                               break;
+                       case 'Z': /* DECID -- Identify Terminal */
+                               ttywrite(VT102ID, sizeof(VT102ID) - 1);
+                               break;
+                       case 'c': /* RIS -- Reset to inital state */
+                               treset();
+                               xresettitle();
+                               xloadcols();
+                               break;
+                       case '=': /* DECPAM -- Application keypad */
+                               term.mode |= MODE_APPKEYPAD;
+                               break;
+                       case '>': /* DECPNM -- Normal keypad */
+                               term.mode &= ~MODE_APPKEYPAD;
+                               break;
+                       case '7': /* DECSC -- Save Cursor */
+                               tcursor(CURSOR_SAVE);
+                               break;
+                       case '8': /* DECRC -- Restore Cursor */
+                               tcursor(CURSOR_LOAD);
+                               break;
+                       case '\\': /* ST -- String Terminator */
+                               if(term.esc & ESC_STR_END)
+                                       strhandle();
+                               break;
+                       default:
+                               fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
+                                       (uchar) ascii, isprint(ascii)? ascii:'.');
+                               break;
+                       }
+               }
+               term.esc = 0;
+               /*
+                * All characters which form part of a sequence are not
+                * printed
+                */
+               return;
+       }
+       if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
+               selclear(NULL);
+
+       gp = &term.line[term.c.y][term.c.x];
+       if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
+               gp->mode |= ATTR_WRAP;
+               tnewline(1);
+       }
+
+       if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
+               memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
+
+       if(term.c.x+width > term.col)
+               tnewline(1);
+
+       tsetchar(c, &term.c.attr, term.c.x, term.c.y);
+
+       if(width == 2) {
+               gp->mode |= ATTR_WIDE;
+               if(term.c.x+1 < term.col) {
+                       gp[1].c[0] = '\0';
+                       gp[1].mode = ATTR_WDUMMY;
+               }

        }
        }

-       tmoveto(xf, yf);
+       if(term.c.x+width < term.col) {
+               tmoveto(term.c.x+width, term.c.y);
+       } else {
+               term.c.state |= CURSOR_WRAPNEXT;
+       }
+}
+
+int
+tresize(int col, int row) {
+       int i;
+       int minrow = MIN(row, term.row);
+       int mincol = MIN(col, term.col);
+       int slide = term.c.y - row + 1;
+       bool *bp;
+       Line *orig;
+       TCursor c;
+
+       if(col < 1 || row < 1)
+               return 0;
+
+       /* 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.alt[i]);
+       }
+
+       /* resize to new height */
+       term.line = xrealloc(term.line, row * sizeof(Line));
+       term.alt  = xrealloc(term.alt,  row * sizeof(Line));
+       term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
+       term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
+
+       /* resize each row to new width, zero-pad if needed */
+       for(i = 0; i < minrow; i++) {
+               term.dirty[i] = 1;
+               term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
+               term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
+       }
+
+       /* allocate any new rows */
+       for(/* i == minrow */; i < row; i++) {
+               term.dirty[i] = 1;
+               term.line[i] = xmalloc(col * sizeof(Glyph));
+               term.alt[i] = xmalloc(col * sizeof(Glyph));
+       }
+       if(col > term.col) {
+               bp = term.tabs + term.col;
+
+               memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
+               while(--bp > term.tabs && !*bp)
+                       /* nothing */ ;
+               for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
+                       *bp = 1;
+       }
+       /* update terminal size */
+       term.col = col;
+       term.row = row;
+       /* reset scrolling region */
+       tsetscroll(0, row-1);
+       /* make use of the LIMIT in tmoveto */
+       tmoveto(term.c.x, term.c.y);
+       /* Clearing both screens */
+       orig = term.line;
+       c = term.c;
+       do {
+               if(mincol < col && 0 < minrow) {
+                       tclearregion(mincol, 0, col - 1, minrow - 1);
+               }
+               if(0 < col && minrow < row) {
+                       tclearregion(0, minrow, col - 1, row - 1);
+               }
+               tswapscreen();
+               tcursor(CURSOR_LOAD);
+       } while(orig != term.line);
+       term.c = c;
+
+       return (slide > 0);
+}
+
+void
+xresize(int col, int row) {
+       xw.tw = MAX(1, col * xw.cw);
+       xw.th = MAX(1, row * xw.ch);
+
+       XFreePixmap(xw.dpy, xw.buf);
+       xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
+                       DefaultDepth(xw.dpy, xw.scr));
+       XftDrawChange(xw.draw, xw.buf);
+       xclear(0, 0, xw.w, xw.h);
+}
+
+static inline ushort
+sixd_to_16bit(int x) {
+       return x == 0 ? 0 : 0x3737 + 0x2828 * x;
+}
+
+void
+xloadcols(void) {
+       int i;
+       XRenderColor color = { .alpha = 0xffff };
+       static bool loaded;
+       Color *cp;
+
+       if(loaded) {
+               for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
+                       XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
+       }
+
+       /* load colors [0-15] and [256-LEN(colorname)] (config.h) */
+       for(i = 0; i < LEN(colorname); i++) {
+               if(!colorname[i])
+                       continue;
+               if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
+                       die("Could not allocate color '%s'\n", colorname[i]);
+               }
+       }
+
+       /* load colors [16-231] ; same colors as xterm */
+       for(i = 16; i < 6*6*6+16; i++) {
+               color.red   = sixd_to_16bit( ((i-16)/36)%6 );
+               color.green = sixd_to_16bit( ((i-16)/6) %6 );
+               color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
+               if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
+                       die("Could not allocate color %d\n", i);
+       }
+
+       /* load colors [232-255] ; grayscale */
+       for(; i < 256; i++) {
+               color.red = color.green = color.blue = 0x0808 + 0x0a0a * (i-(6*6*6+16));
+               if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i]))
+                       die("Could not allocate color %d\n", i);
+       }
+       loaded = true;
+}
+
+int
+xsetcolorname(int x, const char *name) {
+       XRenderColor color = { .alpha = 0xffff };
+       Color ncolor;
+
+       if(!BETWEEN(x, 0, LEN(colorname)))
+               return 1;
+
+       if(!name) {
+               if(BETWEEN(x, 16, 16 + 215)) { /* 256 color */
+                       color.red   = sixd_to_16bit( ((x-16)/36)%6 );
+                       color.green = sixd_to_16bit( ((x-16)/6) %6 );
+                       color.blue  = sixd_to_16bit( ((x-16)/1) %6 );
+                       if(!XftColorAllocValue(xw.dpy, xw.vis,
+                                               xw.cmap, &color, &ncolor)) {
+                               return 1;
+                       }
+
+                       XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
+                       dc.col[x] = ncolor;
+                       return 0;
+               } else if(BETWEEN(x, 16 + 216, 255)) { /* greyscale */
+                       color.red = color.green = color.blue = \
+                                   0x0808 + 0x0a0a * (x - (16 + 216));
+                       if(!XftColorAllocValue(xw.dpy, xw.vis,
+                                               xw.cmap, &color, &ncolor)) {
+                               return 1;
+                       }
+
+                       XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
+                       dc.col[x] = ncolor;
+                       return 0;
+               } else { /* system colors */
+                       name = colorname[x];
+               }
+       }
+       if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &ncolor))
+               return 1;
+
+       XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
+       dc.col[x] = ncolor;
+       return 0;
+}
+
+void
+xtermclear(int col1, int row1, int col2, int row2) {
+       XftDrawRect(xw.draw,
+                       &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
+                       borderpx + col1 * xw.cw,
+                       borderpx + row1 * xw.ch,
+                       (col2-col1+1) * xw.cw,
+                       (row2-row1+1) * xw.ch);
+}
+
+/*
+ * Absolute coordinates.
+ */
+void
+xclear(int x1, int y1, int x2, int y2) {
+       XftDrawRect(xw.draw,
+                       &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
+                       x1, y1, x2-x1, y2-y1);
+}
+
+void
+xhints(void) {
+       XClassHint class = {opt_class ? opt_class : termname, termname};
+       XWMHints wm = {.flags = InputHint, .input = 1};
+       XSizeHints *sizeh = NULL;
+
+       sizeh = XAllocSizeHints();
+
+       sizeh->flags = PSize | PResizeInc | PBaseSize;
+       sizeh->height = xw.h;
+       sizeh->width = xw.w;
+       sizeh->height_inc = xw.ch;
+       sizeh->width_inc = xw.cw;
+       sizeh->base_height = 2 * borderpx;
+       sizeh->base_width = 2 * borderpx;
+       if(xw.isfixed == True) {
+               sizeh->flags |= PMaxSize | PMinSize;
+               sizeh->min_width = sizeh->max_width = xw.w;
+               sizeh->min_height = sizeh->max_height = xw.h;
+       }
+       if(xw.gm & (XValue|YValue)) {
+               sizeh->flags |= USPosition | PWinGravity;
+               sizeh->x = xw.l;
+               sizeh->y = xw.t;
+               sizeh->win_gravity = xgeommasktogravity(xw.gm);
+       }
+
+       XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
+                       &class);
+       XFree(sizeh);
+}
+
+int
+xgeommasktogravity(int mask) {
+       switch(mask & (XNegative|YNegative)) {
+       case 0:
+               return NorthWestGravity;
+       case XNegative:
+               return NorthEastGravity;
+       case YNegative:
+               return SouthWestGravity;
+       }
+       return SouthEastGravity;
+}
+
+int
+xloadfont(Font *f, FcPattern *pattern) {
+       FcPattern *match;
+       FcResult result;
+
+       match = FcFontMatch(NULL, pattern, &result);
+       if(!match)
+               return 1;
+
+       if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
+               FcPatternDestroy(match);
+               return 1;
+       }
+
+       f->set = NULL;
+       f->pattern = FcPatternDuplicate(pattern);
+
+       f->ascent = f->match->ascent;
+       f->descent = f->match->descent;
+       f->lbearing = 0;
+       f->rbearing = f->match->max_advance_width;
+
+       f->height = f->ascent + f->descent;
+       f->width = f->lbearing + f->rbearing;
+
+       return 0;
+}
+
+void
+xloadfonts(char *fontstr, double fontsize) {
+       FcPattern *pattern;
+       FcResult r_sz, r_psz;
+       double fontval;
+       float ceilf(float);
+
+       if(fontstr[0] == '-') {
+               pattern = XftXlfdParse(fontstr, False, False);
+       } else {
+               pattern = FcNameParse((FcChar8 *)fontstr);
+       }
+
+       if(!pattern)
+               die("st: can't open font %s\n", fontstr);
+
+       if(fontsize > 0) {
+               FcPatternDel(pattern, FC_PIXEL_SIZE);
+               FcPatternDel(pattern, FC_SIZE);
+               FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
+               usedfontsize = fontsize;
+       } else {
+               r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
+               r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
+               if(r_psz == FcResultMatch) {
+                       usedfontsize = fontval;
+               } else if(r_sz == FcResultMatch) {
+                       usedfontsize = -1;
+               } else {
+                       /*
+                        * Default font size is 12, if none given. This is to
+                        * have a known usedfontsize value.
+                        */
+                       FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
+                       usedfontsize = 12;
+               }
+       }
+
+       FcConfigSubstitute(0, pattern, FcMatchPattern);
+       FcDefaultSubstitute(pattern);
+
+       if(xloadfont(&dc.font, pattern))
+               die("st: can't open font %s\n", fontstr);
+
+       if(usedfontsize < 0) {
+               FcPatternGetDouble(dc.font.match->pattern,
+                                  FC_PIXEL_SIZE, 0, &fontval);
+               usedfontsize = fontval;
+       }
+
+       /* Setting character width and height. */
+       xw.cw = ceilf(dc.font.width * cwscale);
+       xw.ch = ceilf(dc.font.height * chscale);
+
+       FcPatternDel(pattern, FC_SLANT);
+       FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
+       if(xloadfont(&dc.ifont, pattern))
+               die("st: can't open font %s\n", fontstr);
+
+       FcPatternDel(pattern, FC_WEIGHT);
+       FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
+       if(xloadfont(&dc.ibfont, pattern))
+               die("st: can't open font %s\n", fontstr);
+
+       FcPatternDel(pattern, FC_SLANT);
+       FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
+       if(xloadfont(&dc.bfont, pattern))
+               die("st: can't open font %s\n", fontstr);
+
+       FcPatternDestroy(pattern);
+}
+
+int
+xloadfontset(Font *f) {
+       FcResult result;
+
+       if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
+               return 1;
+       return 0;
+}
+
+void
+xunloadfont(Font *f) {
+       XftFontClose(xw.dpy, f->match);
+       FcPatternDestroy(f->pattern);
+       if(f->set)
+               FcFontSetDestroy(f->set);

 }
 
 void
 }
 
 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;
+xunloadfonts(void) {
+       /* Free the loaded fonts in the font cache.  */
+       while(frclen > 0)
+               XftFontClose(xw.dpy, frc[--frclen].font);
+
+       xunloadfont(&dc.font);
+       xunloadfont(&dc.bfont);
+       xunloadfont(&dc.ifont);
+       xunloadfont(&dc.ibfont);

 }
 
 void
 }
 
 void

-tclearregion(int x1, int y1, int x2, int y2) {
-       int x, y;
+xzoom(const Arg *arg) {
+       xunloadfonts();
+       xloadfonts(usedfont, usedfontsize + arg->i);
+       cresize(0, 0);
+       redraw(0);
+       xhints();
+}

 
 

-       LIMIT(x1, 0, term.col-1);
-       LIMIT(x2, 0, term.col-1);
-       LIMIT(y1, 0, term.row-1);
-       LIMIT(y2, 0, term.row-1);
+void
+xinit(void) {
+       XGCValues gcvalues;
+       Cursor cursor;
+       Window parent;
+       pid_t thispid = getpid();

 
 

-       /* XXX: could be optimized */
-       for(x = x1; x <= x2; x++)
-               for(y = y1; y <= y2; y++)
-                       memset(&term.line[y][x], 0, sizeof(Glyph));
+       if(!(xw.dpy = XOpenDisplay(NULL)))
+               die("Can't open display\n");
+       xw.scr = XDefaultScreen(xw.dpy);
+       xw.vis = XDefaultVisual(xw.dpy, xw.scr);

 
 

-       xclear(x1, y1, x2, y2);
-}
+       /* font */
+       if(!FcInit())
+               die("Could not init fontconfig.\n");

 
 

-void
-tdeletechar(int n) {
-       int src = term.c.x + n;
-       int dst = term.c.x;
-       int size = term.col - src;
+       usedfont = (opt_font == NULL)? font : opt_font;
+       xloadfonts(usedfont, 0);

 
 

-       if(src >= term.col) {
-               tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
-               return;
+       /* colors */
+       xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+       xloadcols();
+
+       /* adjust fixed window geometry */
+       xw.w = 2 * borderpx + term.col * xw.cw;
+       xw.h = 2 * borderpx + term.row * xw.ch;
+       if(xw.gm & XNegative)
+               xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
+       if(xw.gm & YNegative)
+               xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
+
+       /* Events */
+       xw.attrs.background_pixel = dc.col[defaultbg].pixel;
+       xw.attrs.border_pixel = dc.col[defaultbg].pixel;
+       xw.attrs.bit_gravity = NorthWestGravity;
+       xw.attrs.event_mask = FocusChangeMask | KeyPressMask
+               | ExposureMask | VisibilityChangeMask | StructureNotifyMask
+               | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
+       xw.attrs.colormap = xw.cmap;
+
+       parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
+                       XRootWindow(xw.dpy, xw.scr);
+       xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
+                       xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
+                       xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
+                       | CWEventMask | CWColormap, &xw.attrs);
+
+       memset(&gcvalues, 0, sizeof(gcvalues));
+       gcvalues.graphics_exposures = False;
+       dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
+                       &gcvalues);
+       xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
+                       DefaultDepth(xw.dpy, xw.scr));
+       XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
+       XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
+
+       /* Xft rendering context */
+       xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
+
+       /* input methods */
+       if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
+               XSetLocaleModifiers("@im=local");
+               if((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
+                       XSetLocaleModifiers("@im=");
+                       if((xw.xim = XOpenIM(xw.dpy,
+                                       NULL, NULL, NULL)) == NULL) {
+                               die("XOpenIM failed. Could not open input"
+                                       " device.\n");
+                       }
+               }

        }
        }

-       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);
+       xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
+                                          | XIMStatusNothing, XNClientWindow, xw.win,
+                                          XNFocusWindow, xw.win, NULL);
+       if(xw.xic == NULL)
+               die("XCreateIC failed. Could not obtain input method.\n");
+
+       /* white cursor, black outline */
+       cursor = XCreateFontCursor(xw.dpy, XC_xterm);
+       XDefineCursor(xw.dpy, xw.win, cursor);
+       XRecolorCursor(xw.dpy, cursor,
+               &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
+               &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
+
+       xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
+       xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
+       xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
+       XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
+
+       xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
+       XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
+                       PropModeReplace, (uchar *)&thispid, 1);
+
+       xresettitle();
+       XMapWindow(xw.dpy, xw.win);
+       xhints();
+       XSync(xw.dpy, False);

 }
 
 void
 }
 
 void

-tinsertblank(int n) {
-       int src = term.c.x;
-       int dst = src + n;
-       int size = term.col - n - src;
+xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
+       int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
+           width = charlen * xw.cw, xp, i;
+       int frcflags;
+       int u8fl, u8fblen, u8cblen, doesexist;
+       char *u8c, *u8fs;
+       long unicodep;
+       Font *font = &dc.font;
+       FcResult fcres;
+       FcPattern *fcpattern, *fontpattern;
+       FcFontSet *fcsets[] = { NULL };
+       FcCharSet *fccharset;
+       Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
+       XRenderColor colfg, colbg;
+       XRectangle r;
+       int oneatatime;
+
+       frcflags = FRC_NORMAL;
+
+       if(base.mode & ATTR_ITALIC) {
+               if(base.fg == defaultfg)
+                       base.fg = defaultitalic;
+               font = &dc.ifont;
+               frcflags = FRC_ITALIC;
+       } else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
+               if(base.fg == defaultfg)
+                       base.fg = defaultitalic;
+               font = &dc.ibfont;
+               frcflags = FRC_ITALICBOLD;
+       } else if(base.mode & ATTR_UNDERLINE) {
+               if(base.fg == defaultfg)
+                       base.fg = defaultunderline;
+       }

 
 

-       if(dst >= term.col) {
-               tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
-               return;
+       if(IS_TRUECOL(base.fg)) {
+               colfg.alpha = 0xffff;
+               colfg.red = TRUERED(base.fg);
+               colfg.green = TRUEGREEN(base.fg);
+               colfg.blue = TRUEBLUE(base.fg);
+               XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
+               fg = &truefg;
+       } else {
+               fg = &dc.col[base.fg];

        }
        }

-       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);
-}

 
 

-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);
-               return;
+       if(IS_TRUECOL(base.bg)) {
+               colbg.alpha = 0xffff;
+               colbg.green = TRUEGREEN(base.bg);
+               colbg.red = TRUERED(base.bg);
+               colbg.blue = TRUEBLUE(base.bg);
+               XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
+               bg = &truebg;
+       } else {
+               bg = &dc.col[base.bg];

        }
        }

-       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));
+
+       if(base.mode & ATTR_BOLD) {
+               /*
+                * change basic system colors [0-7]
+                * to bright system colors [8-15]
+                */
+               if(BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
+                       fg = &dc.col[base.fg + 8];
+
+               if(base.mode & ATTR_ITALIC) {
+                       font = &dc.ibfont;
+                       frcflags = FRC_ITALICBOLD;
+               } else {
+                       font = &dc.bfont;
+                       frcflags = FRC_BOLD;
+               }

        }
        }

-}

 
 

+       if(IS_SET(MODE_REVERSE)) {
+               if(fg == &dc.col[defaultfg]) {
+                       fg = &dc.col[defaultbg];
+               } else {
+                       colfg.red = ~fg->color.red;
+                       colfg.green = ~fg->color.green;
+                       colfg.blue = ~fg->color.blue;
+                       colfg.alpha = fg->color.alpha;
+                       XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
+                                       &revfg);
+                       fg = &revfg;
+               }

 
 

-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);
-               return;
+               if(bg == &dc.col[defaultbg]) {
+                       bg = &dc.col[defaultfg];
+               } else {
+                       colbg.red = ~bg->color.red;
+                       colbg.green = ~bg->color.green;
+                       colbg.blue = ~bg->color.blue;
+                       colbg.alpha = bg->color.alpha;
+                       XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
+                                       &revbg);
+                       bg = &revbg;
+               }

        }
        }

-       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));
+
+       if(base.mode & ATTR_REVERSE) {
+               temp = fg;
+               fg = bg;
+               bg = temp;

        }
        }

-}

 
 

-void
-tsetattr(int *attr, int l) {
-       int i;
+       if(base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
+               colfg.red = fg->color.red / 2;
+               colfg.green = fg->color.green / 2;
+               colfg.blue = fg->color.blue / 2;
+               XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
+               fg = &revfg;
+       }

 
 

-               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;
-                       }
-               }
-}
+       if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
+               fg = bg;

 
 

-void
-tsetscroll(int t, int b) {
-       int temp;
+       if(base.mode & ATTR_INVISIBLE)
+               fg = bg;

 
 

-       LIMIT(t, 0, term.row-1);
-       LIMIT(b, 0, term.row-1);
-       if(t > b) {
-               temp = t;
-               t = b;
-               b = temp;
+       /* Intelligent cleaning up of the borders. */
+       if(x == 0) {
+               xclear(0, (y == 0)? 0 : winy, borderpx,
+                       winy + xw.ch + ((y >= term.row-1)? xw.h : 0));

        }
        }

-       term.top = t;
-       term.bot = b;    
-}
-
+       if(x + charlen >= term.col) {
+               xclear(winx + width, (y == 0)? 0 : winy, xw.w,
+                       ((y >= term.row-1)? xw.h : (winy + xw.ch)));
+       }
+       if(y == 0)
+               xclear(winx, 0, winx + width, borderpx);
+       if(y == term.row-1)
+               xclear(winx, winy + xw.ch, winx + width, xw.h);
+
+       /* Clean up the region we want to draw to. */
+       XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
+
+       /* Set the clip region because Xft is sometimes dirty. */
+       r.x = 0;
+       r.y = 0;
+       r.height = xw.ch;
+       r.width = width;
+       XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
+
+       for(xp = winx; bytelen > 0;) {
+               /*
+                * Search for the range in the to be printed string of glyphs
+                * that are in the main font. Then print that range. If
+                * some glyph is found that is not in the font, do the
+                * fallback dance.
+                */
+               u8fs = s;
+               u8fblen = 0;
+               u8fl = 0;
+               oneatatime = font->width != xw.cw;
+               for(;;) {
+                       u8c = s;
+                       u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
+                       s += u8cblen;
+                       bytelen -= u8cblen;
+
+                       doesexist = XftCharExists(xw.dpy, font->match, unicodep);
+                       if(doesexist) {
+                                       u8fl++;
+                                       u8fblen += u8cblen;
+                                       if(!oneatatime && bytelen > 0)
+                                                       continue;
+                       }

 
 

-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);
-                       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 1: /* above */
-                               tclearregion(0, 0, term.c.x, term.c.y);
-                               break;
-                       case 2: /* all */
-                               tclearregion(0, 0, term.col-1, term.row-1);
-                               break;                            
+                       if(u8fl > 0) {
+                               XftDrawStringUtf8(xw.draw, fg,
+                                               font->match, xp,
+                                               winy + font->ascent,
+                                               (FcChar8 *)u8fs,
+                                               u8fblen);
+                               xp += xw.cw * u8fl;

                        }
                        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 1: /* left */
-                               tclearregion(0, term.c.y, term.c.x, term.c.y);
-                               break;
-                       case 2: /* all */
-                               tclearregion(0, term.c.y, term.col-1, term.c.y);
+               }
+               if(doesexist) {
+                       if(oneatatime)
+                               continue;
+                       break;
+               }
+
+               /* Search the font cache. */
+               for(i = 0; i < frclen; i++) {
+                       if(XftCharExists(xw.dpy, frc[i].font, unicodep)
+                                       && frc[i].flags == frcflags) {

                                break;
                        }
                                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> */
-                       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);
+               }
+
+               /* Nothing was found. */
+               if(i >= frclen) {
+                       if(!font->set)
+                               xloadfontset(font);
+                       fcsets[0] = font->set;
+
+                       /*
+                        * Nothing was found in the cache. Now use
+                        * some dozen of Fontconfig calls to get the
+                        * font for one single character.
+                        *
+                        * Xft and fontconfig are design failures.
+                        */
+                       fcpattern = FcPatternDuplicate(font->pattern);
+                       fccharset = FcCharSetCreate();
+
+                       FcCharSetAddChar(fccharset, unicodep);
+                       FcPatternAddCharSet(fcpattern, FC_CHARSET,
+                                       fccharset);
+                       FcPatternAddBool(fcpattern, FC_SCALABLE,
+                                       FcTrue);
+
+                       FcConfigSubstitute(0, fcpattern,
+                                       FcMatchPattern);
+                       FcDefaultSubstitute(fcpattern);
+
+                       fontpattern = FcFontSetMatch(0, fcsets,
+                                       FcTrue, fcpattern, &fcres);
+
+                       /*
+                        * Overwrite or create the new cache entry.
+                        */
+                       if(frclen >= LEN(frc)) {
+                               frclen = LEN(frc) - 1;
+                               XftFontClose(xw.dpy, frc[frclen].font);

                        }
                        }

-                       break;
-               case 's': /* Save cursor position */
-                       tcpos(CSsave);
-                       break;
-               case 'u': /* Load cursor position */
-                       tcpos(CSload);
-                       break;
+
+                       frc[frclen].font = XftFontOpenPattern(xw.dpy,
+                                       fontpattern);
+                       frc[frclen].flags = frcflags;
+
+                       i = frclen;
+                       frclen++;
+
+                       FcPatternDestroy(fcpattern);
+                       FcCharSetDestroy(fccharset);

                }
                }

-               break;
+
+               XftDrawStringUtf8(xw.draw, fg, frc[i].font,
+                               xp, winy + frc[i].font->ascent,
+                               (FcChar8 *)u8c, u8cblen);
+
+               xp += xw.cw * wcwidth(unicodep);
+       }
+
+       /*
+        * This is how the loop above actually should be. Why does the
+        * application have to care about font details?
+        *
+        * I have to repeat: Xft and Fontconfig are design failures.
+        */
+       /*
+       XftDrawStringUtf8(xw.draw, fg, font->set, winx,
+                       winy + font->ascent, (FcChar8 *)s, bytelen);
+       */
+
+       if(base.mode & ATTR_UNDERLINE) {
+               XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
+                               width, 1);
+       }
+
+       if(base.mode & ATTR_STRUCK) {
+               XftDrawRect(xw.draw, fg, winx, winy + 2 * font->ascent / 3,
+                               width, 1);

        }
        }

+
+       /* Reset clip to none. */
+       XftDrawSetClip(xw.draw, 0);

 }
 
 void
 }
 
 void

-escdump(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) {
-               for(i = 0; i < escseq.narg; i++)
-                       printf("\targ %d = %d\n", i, escseq.arg[i]);
+xdrawcursor(void) {
+       static int oldx = 0, oldy = 0;
+       int sl, width, curx;
+       Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
+
+       LIMIT(oldx, 0, term.col-1);
+       LIMIT(oldy, 0, term.row-1);
+
+       curx = term.c.x;
+
+       /* adjust position if in dummy */
+       if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
+               oldx--;
+       if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
+               curx--;
+
+       memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
+
+       /* remove the old cursor */
+       sl = utf8len(term.line[oldy][oldx].c);
+       width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
+       xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
+                       oldy, width, sl);
+
+       /* draw the new one */
+       if(!(IS_SET(MODE_HIDE))) {
+               if(xw.state & WIN_FOCUSED) {
+                       if(IS_SET(MODE_REVERSE)) {
+                               g.mode |= ATTR_REVERSE;
+                               g.fg = defaultcs;
+                               g.bg = defaultfg;
+                       }
+
+                       sl = utf8len(g.c);
+                       width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
+                               ? 2 : 1;
+                       xdraws(g.c, g, term.c.x, term.c.y, width, sl);
+               } else {
+                       XftDrawRect(xw.draw, &dc.col[defaultcs],
+                                       borderpx + curx * xw.cw,
+                                       borderpx + term.c.y * xw.ch,
+                                       xw.cw - 1, 1);
+                       XftDrawRect(xw.draw, &dc.col[defaultcs],
+                                       borderpx + curx * xw.cw,
+                                       borderpx + term.c.y * xw.ch,
+                                       1, xw.ch - 1);
+                       XftDrawRect(xw.draw, &dc.col[defaultcs],
+                                       borderpx + (curx + 1) * xw.cw - 1,
+                                       borderpx + term.c.y * xw.ch,
+                                       1, xw.ch - 1);
+                       XftDrawRect(xw.draw, &dc.col[defaultcs],
+                                       borderpx + curx * xw.cw,
+                                       borderpx + (term.c.y + 1) * xw.ch - 1,
+                                       xw.cw, 1);
+               }
+               oldx = curx, oldy = term.c.y;

        }
        }

-       printf("mode    : %c\n", escseq.mode);

 }
 
 }
 

+

 void
 void

-escreset(void) {
-       memset(&escseq, 0, sizeof(escseq));
+xsettitle(char *p) {
+       XTextProperty prop;
+
+       Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
+                       &prop);
+       XSetWMName(xw.dpy, xw.win, &prop);
+       XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
+       XFree(prop.value);

 }
 
 void
 }
 
 void

-tputtab(void) {
-       int space = TAB - term.c.x % TAB;
-       
-       if(term.c.x + space >= term.col)
-               space--;
-       
-       for(; space > 0; space--)
-               tcursor(CSright);
+xresettitle(void) {
+       xsettitle(opt_title ? opt_title : "st");

 }
 
 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;
-               case '\t':
-                       tputtab();
-                       break;
-               case '\b':
-                       tcursor(CSleft);
-                       break;
-               case '\r':
-                       tmoveto(0, term.c.y);
-                       break;
-               case '\n':
-                       tnewline();
-                       break;
-               case '\a':
-                       xbell();
-                       break;
+redraw(int timeout) {
+       struct timespec tv = {0, timeout * 1000};
+
+       tfulldirt();
+       draw();
+
+       if(timeout > 0) {
+               nanosleep(&tv, NULL);
+               XSync(xw.dpy, False); /* necessary for a good tput flash */

        }
 }
 
 void
        }
 }
 
 void

-tputs(char *s, int len) { 
-       for(; len > 0; len--)
-               tputc(*s++);
+draw(void) {
+       drawregion(0, 0, term.col, term.row);
+       XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
+                       xw.h, 0, 0);
+       XSetForeground(xw.dpy, dc.gc,
+                       dc.col[IS_SET(MODE_REVERSE)?
+                               defaultfg : defaultbg].pixel);

 }
 
 void
 }
 
 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 : '.');
+drawregion(int x1, int y1, int x2, int y2) {
+       int ic, ib, x, y, ox, sl;
+       Glyph base, new;
+       char buf[DRAW_BUF_SIZ];
+       bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
+       long unicodep;
+
+       if(!(xw.state & WIN_VISIBLE))
+               return;
+
+       for(y = y1; y < y2; y++) {
+               if(!term.dirty[y])
+                       continue;
+
+               xtermclear(0, y, term.col, y);
+               term.dirty[y] = 0;
+               base = term.line[y][0];
+               ic = ib = ox = 0;
+               for(x = x1; x < x2; x++) {
+                       new = term.line[y][x];
+                       if(new.mode == ATTR_WDUMMY)
+                               continue;
+                       if(ena_sel && selected(x, y))
+                               new.mode ^= ATTR_REVERSE;
+                       if(ib > 0 && (ATTRCMP(base, new)
+                                       || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
+                               xdraws(buf, base, ox, y, ic, ib);
+                               ic = ib = 0;

                        }
                        }

+                       if(ib == 0) {
+                               ox = x;
+                               base = new;
+                       }
+
+                       sl = utf8decode(new.c, &unicodep, UTF_SIZ);
+                       memcpy(buf+ib, new.c, sl);
+                       ib += sl;
+                       ic += (new.mode & ATTR_WIDE)? 2 : 1;

                }
                }

-               putchar('\n');
+               if(ib > 0)
+                       xdraws(buf, base, ox, y, ic, ib);

        }
        }

+       xdrawcursor();

 }
 
 void
 }
 
 void

-tresize(int col, int row) {
-       int i;
-       Line *line;
-       int minrow = MIN(row, term.row);
-       int mincol = MIN(col, term.col);
+expose(XEvent *ev) {
+       XExposeEvent *e = &ev->xexpose;

 
 

-       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(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);
-       
-       term.bot = row-1;
-       term.line = line;
-       term.col = col, term.row = row;
+       if(xw.state & WIN_REDRAW) {
+               if(!e->count)
+                       xw.state &= ~WIN_REDRAW;
+       }
+       redraw(0);

 }
 
 }
 

-unsigned long
-xgetcol(const char *s) {
-       XColor color;
-       Colormap cmap = DefaultColormap(xw.dis, xw.scr);
-
-       if(!XAllocNamedColor(xw.dis, cmap, s, &color, &color)) {
-               color.pixel = WhitePixel(xw.dis, xw.scr);
-               fprintf(stderr, "Could not allocate color '%s'\n", s);
+void
+visibility(XEvent *ev) {
+       XVisibilityEvent *e = &ev->xvisibility;
+
+       if(e->state == VisibilityFullyObscured) {
+               xw.state &= ~WIN_VISIBLE;
+       } else if(!(xw.state & WIN_VISIBLE)) {
+               /* need a full redraw for next Expose, not just a buf copy */
+               xw.state |= WIN_VISIBLE | WIN_REDRAW;

        }
        }

-       return color.pixel;

 }
 
 }
 

-

 void
 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);
+unmap(XEvent *ev) {
+       xw.state &= ~WIN_VISIBLE;

 }
 
 }
 

+void
+xsetpointermotion(int set) {
+       MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
+       XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
+}

 
 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;
+xseturgency(int add) {
+       XWMHints *h = XGetWMHints(xw.dpy, xw.win);

 
 

-       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);
+       MODBIT(h->flags, add, XUrgencyHint);
+       XSetWMHints(xw.dpy, xw.win, h);
+       XFree(h);

 }
 
 }
 

+void
+focus(XEvent *ev) {
+       XFocusChangeEvent *e = &ev->xfocus;
+
+       if(e->mode == NotifyGrab)
+               return;

 
 

+       if(ev->type == FocusIn) {
+               XSetICFocus(xw.xic);
+               xw.state |= WIN_FOCUSED;
+               xseturgency(0);
+               if(IS_SET(MODE_FOCUS))
+                       ttywrite("\033[I", 3);
+       } else {
+               XUnsetICFocus(xw.xic);
+               xw.state &= ~WIN_FOCUSED;
+               if(IS_SET(MODE_FOCUS))
+                       ttywrite("\033[O", 3);
+       }
+}

 
 

+static inline bool
+match(uint mask, uint state) {
+       return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
+}

 
 void
 
 void

-xinit(void) {
-       XGCValues values;
-       unsigned long valuemask;
-       XClassHint chint;
-       XWMHints wmhint;
-       XSizeHints shint;
-       char *args[] = {NULL};
+numlock(const Arg *dummy) {
+       term.numlock ^= 1;
+}
+
+char*
+kmap(KeySym k, uint state) {
+       Key *kp;

        int i;
 
        int i;
 

-       xw.dis = XOpenDisplay(NULL);
-       xw.scr = XDefaultScreen(xw.dis);
-       if(!xw.dis)
-               die("can not open display");
-       
-       /* font */
-       if(!(dc.font = XLoadQueryFont(xw.dis, FONT)))
-               die("can not find font " FONT);
+       /* Check for mapped keys out of X11 function keys. */
+       for(i = 0; i < LEN(mappedkeys); i++) {
+               if(mappedkeys[i] == k)
+                       break;
+       }
+       if(i == LEN(mappedkeys)) {
+               if((k & 0xFFFF) < 0xFD00)
+                       return NULL;
+       }

 
 

-       xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
-       xw.ch = dc.font->ascent + dc.font->descent + LINESPACE;
+       for(kp = key; kp < key + LEN(key); kp++) {
+               if(kp->k != k)
+                       continue;

 
 

-       /* 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]);
-       /* 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);
-       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);
-       XSync(xw.dis, 0);
-}
-
-void
-xdrawc(int x, int y, Glyph g) {
-       XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
-       unsigned long xfg, xbg;
-
-       /* reverse video */
-       if(g.mode & ATreverse)
-               xfg = dc.col[g.bg], xbg = dc.col[g.fg];
-       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 */
-       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);
-       }
-}
-
-void
-xcursor(int mode) {
-       static int oldx = 0;
-       static int oldy = 0;
-       Glyph g = {' ', ATnone, DefaultBG, DefaultCS, 0};
-       
-       LIMIT(oldx, 0, term.col-1);
-       LIMIT(oldy, 0, term.row-1);
-       
-       if(term.line[term.c.y][term.c.x].state & CRset)
-               g.c = term.line[term.c.y][term.c.x].c;
-       /* 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) {
-               xdrawc(term.c.x, term.c.y, g);
-               oldx = term.c.x, oldy = term.c.y;
-       }
-}
+               if(!match(kp->mask, state))
+                       continue;

 
 

+               if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
+                       continue;
+               if(term.numlock && kp->appkey == 2)
+                       continue;

 
 

-void
-draw(int redraw_all) {
-       int x, y;
-       int changed, set;
-
-       if(redraw_all)
-               XClearWindow(xw.dis, xw.win);
-       /* XXX: drawing could be optimised */
-       for(y = 0; y < term.row; y++) {
-               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]);
-                       }
-               }
+               if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
+                       continue;
+
+               if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
+                       continue;
+
+               return kp->s;

        }
        }

-       xcursor(CSdraw);
+
+       return NULL;

 }
 
 void
 }
 
 void

-kpress(XKeyEvent *e) {
+kpress(XEvent *ev) {
+       XKeyEvent *e = &ev->xkey;

        KeySym ksym;
        KeySym ksym;

-       char buf[32];
+       char buf[32], *customkey;

        int len;
        int len;

-       int meta;
-       int shift;
-
-       meta  = e->state & Mod1Mask;
-       shift = e->state & ShiftMask;
-       len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
-       if(len > 0) {
-               buf[sizeof(buf)-1] = '\0';
-               if(meta && len == 1)
-                       ttywrite("\033", 1);
-               ttywrite(buf, len);
+       long c;
+       Status status;
+       Shortcut *bp;
+
+       if(IS_SET(MODE_KBDLOCK))

                return;
                return;

+
+       len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
+       /* 1. shortcuts */
+       for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
+               if(ksym == bp->keysym && match(bp->mod, e->state)) {
+                       bp->func(&(bp->arg));
+                       return;
+               }

        }
        }

-       switch(ksym) {
-       default:
-               fprintf(stderr, "errkey: %d\n", (int)ksym);
-               break;
-       case XK_Up:
-       case XK_Down:
-       case XK_Left:
-       case XK_Right:
-               sprintf(buf, "\033[%c", "DACB"[ksym - XK_Left]);
-               ttywrite(buf, 3);
-               break;
-       case XK_Delete: ttywrite(KEYDELETE, sizeof(KEYDELETE)-1); break;
-       case XK_Home:  ttywrite(KEYHOME, sizeof(KEYHOME)-1); break;
-       case XK_End:   ttywrite(KEYEND,  sizeof(KEYEND) -1); break;
-       case XK_Prior: ttywrite(KEYPREV, sizeof(KEYPREV)-1); break;
-       case XK_Next:  ttywrite(KEYNEXT, sizeof(KEYNEXT)-1); break;
-       case XK_Insert:
-               /* XXX: paste X clipboard */
-               if(shift)
-                       ;
-               break;
+
+       /* 2. custom keys from config.h */
+       if((customkey = kmap(ksym, e->state))) {
+               ttysend(customkey, strlen(customkey));
+               return;
+       }
+
+       /* 3. composed string from input method */
+       if(len == 0)
+               return;
+       if(len == 1 && e->state & Mod1Mask) {
+               if(IS_SET(MODE_8BIT)) {
+                       if(*buf < 0177) {
+                               c = *buf | 0x80;
+                               len = utf8encode(c, buf, UTF_SIZ);
+                       }
+               } else {
+                       buf[1] = buf[0];
+                       buf[0] = '\033';
+                       len = 2;
+               }

        }
        }

+       ttysend(buf, len);

 }
 
 }
 

+

 void
 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);
+cmessage(XEvent *e) {
+       /*
+        * See xembed specs
+        *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
+        */
+       if(e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
+               if(e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
+                       xw.state |= WIN_FOCUSED;
+                       xseturgency(0);
+               } else if(e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
+                       xw.state &= ~WIN_FOCUSED;
+               }
+       } else if(e->xclient.data.l[0] == xw.wmdeletewin) {
+               /* Send SIGHUP to shell */
+               kill(pid, SIGHUP);
+               exit(EXIT_SUCCESS);

        }
 }
 
        }
 }
 

+void
+cresize(int width, int height) {
+       int col, row;
+
+       if(width != 0)
+               xw.w = width;
+       if(height != 0)
+               xw.h = height;
+
+       col = (xw.w - 2 * borderpx) / xw.cw;
+       row = (xw.h - 2 * borderpx) / xw.ch;
+
+       tresize(col, row);
+       xresize(col, row);
+       ttyresize();
+}
+
+void
+resize(XEvent *e) {
+       if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
+               return;
+
+       cresize(e->xconfigure.width, e->xconfigure.height);
+}

 
 void
 run(void) {
 
 void
 run(void) {

-       int ret;

        XEvent ev;
        XEvent ev;

+       int w = xw.w, h = xw.h;

        fd_set rfd;
        fd_set rfd;

-       int xfd = XConnectionNumber(xw.dis);
+       int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
+       struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
+       long deltatime;
+
+       /* Waiting for window mapping */
+       while(1) {
+               XNextEvent(xw.dpy, &ev);
+               if(ev.type == ConfigureNotify) {
+                       w = ev.xconfigure.width;
+                       h = ev.xconfigure.height;
+               } else if(ev.type == MapNotify) {
+                       break;
+               }
+       }
+
+       ttynew();
+       cresize(w, h);

 
 

-       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) {
+       clock_gettime(CLOCK_MONOTONIC, &last);
+       lastblink = last;
+
+       for(xev = actionfps;;) {

                FD_ZERO(&rfd);
                FD_SET(cmdfd, &rfd);
                FD_SET(xfd, &rfd);
                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)
-                       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(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
+                       if(errno == EINTR)
+                               continue;
+                       die("select failed: %s\n", strerror(errno));

                }
                if(FD_ISSET(cmdfd, &rfd)) {
                        ttyread();
                }
                if(FD_ISSET(cmdfd, &rfd)) {
                        ttyread();

-                       draw(SCupdate);
+                       if(blinktimeout) {
+                               blinkset = tattrset(ATTR_BLINK);
+                               if(!blinkset)
+                                       MODBIT(term.mode, 0, MODE_BLINK);
+                       }
+               }
+
+               if(FD_ISSET(xfd, &rfd))
+                       xev = actionfps;
+
+               clock_gettime(CLOCK_MONOTONIC, &now);
+               drawtimeout.tv_sec = 0;
+               drawtimeout.tv_nsec = (1000/xfps) * 1E6;
+               tv = &drawtimeout;
+
+               dodraw = 0;
+               if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
+                       tsetdirtattr(ATTR_BLINK);
+                       term.mode ^= MODE_BLINK;
+                       lastblink = now;
+                       dodraw = 1;
+               }
+               deltatime = TIMEDIFF(now, last);
+               if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
+                               || deltatime < 0) {
+                       dodraw = 1;
+                       last = now;
+               }
+
+               if(dodraw) {
+                       while(XPending(xw.dpy)) {
+                               XNextEvent(xw.dpy, &ev);
+                               if(XFilterEvent(&ev, None))
+                                       continue;
+                               if(handler[ev.type])
+                                       (handler[ev.type])(&ev);
+                       }
+
+                       draw();
+                       XFlush(xw.dpy);
+
+                       if(xev && !FD_ISSET(xfd, &rfd))
+                               xev--;
+                       if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
+                               if(blinkset) {
+                                       if(TIMEDIFF(now, lastblink) \
+                                                       > blinktimeout) {
+                                               drawtimeout.tv_nsec = 1000;
+                                       } else {
+                                               drawtimeout.tv_nsec = (1E6 * \
+                                                       (blinktimeout - \
+                                                       TIMEDIFF(now,
+                                                               lastblink)));
+                                       }
+                               } else {
+                                       tv = NULL;
+                               }
+                       }

                }
        }
 }
 
                }
        }
 }
 

+void
+usage(void) {
+       die("%s " VERSION " (c) 2010-2014 st engineers\n" \
+       "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
+       " [-t title] [-w windowid] [-e command ...]\n", argv0);
+}
+

 int
 main(int argc, char *argv[]) {
 int
 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");
+       char *titles;
+       uint cols = 80, rows = 24;
+
+       xw.l = xw.t = 0;
+       xw.isfixed = False;
+
+       ARGBEGIN {
+       case 'a':
+               allowaltscreen = false;
+               break;
+       case 'c':
+               opt_class = EARGF(usage());
+               break;
+       case 'e':
+               /* eat all remaining arguments */
+               if(argc > 1) {
+                       opt_cmd = &argv[1];
+                       if(argv[1] != NULL && opt_title == NULL) {
+                               titles = xstrdup(argv[1]);
+                               opt_title = basename(titles);
+                       }
+               }
+               goto run;
+       case 'f':
+               opt_font = EARGF(usage());
+               break;
+       case 'g':
+               xw.gm = XParseGeometry(EARGF(usage()),
+                               &xw.l, &xw.t, &cols, &rows);
+               break;
+       case 'i':
+               xw.isfixed = True;
+               break;
+       case 'o':
+               opt_io = EARGF(usage());
+               break;
+       case 't':
+               opt_title = EARGF(usage());
+               break;
+       case 'w':
+               opt_embed = EARGF(usage());
+               break;
+       case 'v':
+       default:
+               usage();
+       } ARGEND;
+
+run:

        setlocale(LC_CTYPE, "");
        setlocale(LC_CTYPE, "");

-       tnew(80, 24);
-       ttynew();
+       XSetLocaleModifiers("");
+       tnew(cols? cols : 1, rows? rows : 1);

        xinit();
        xinit();

+       selinit();

        run();
        run();

+

        return 0;
 }
        return 0;
 }

+