added note about the low precedence of shell to config.def.h

[st.git] / st.c

diff --git a/st.c b/st.c
index 4f17752..b604f0e 100644 (file)
--- a/st.c
+++ b/st.c
@@ -1,153 +1,368 @@
-/* See LICENSE for licence details. */
-#define _XOPEN_SOURCE 600
+/* See LICENSE for license details. */

 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <locale.h>
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <locale.h>

+#include <pwd.h>

 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <signal.h>
 #include <stdarg.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/ioctl.h>
 #include <sys/select.h>
 #include <sys/stat.h>

+#include <sys/time.h>

 #include <sys/types.h>
 #include <sys/wait.h>
 #include <sys/types.h>
 #include <sys/wait.h>

+#include <time.h>

 #include <unistd.h>
 #include <unistd.h>

-#include <X11/Xlib.h>
+#include <libgen.h>

 #include <X11/Xatom.h>
 #include <X11/Xatom.h>

-#include <X11/keysym.h>
+#include <X11/Xlib.h>

 #include <X11/Xutil.h>
 #include <X11/Xutil.h>

+#include <X11/cursorfont.h>
+#include <X11/keysym.h>
+#include <X11/Xft/Xft.h>
+#include <X11/XKBlib.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>
 
 #if   defined(__linux)
  #include <pty.h>

-#elif defined(__OpenBSD__) || defined(__NetBSD__)
+#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)

  #include <util.h>
 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  #include <libutil.h>
 #endif
 
  #include <util.h>
 #elif defined(__FreeBSD__) || defined(__DragonFly__)
  #include <libutil.h>
 #endif
 

-#define USAGE \
-       "st-" VERSION ", (c) 2010 st engineers\n" \
-       "usage: st [-t title] [-e cmd] [-v]\n"
+
+/* XEMBED messages */
+#define XEMBED_FOCUS_IN  4
+#define XEMBED_FOCUS_OUT 5

 
 /* Arbitrary sizes */
 
 /* Arbitrary sizes */

-#define ESC_TITLE_SIZ 256
-#define ESC_BUF_SIZ   256
+#define UTF_INVALID   0xFFFD
+#define UTF_SIZ       4
+#define ESC_BUF_SIZ   (128*UTF_SIZ)

 #define ESC_ARG_SIZ   16
 #define ESC_ARG_SIZ   16

-#define DRAW_BUF_SIZ  1024
-
-#define SERRNO strerror(errno)
-#define MIN(a, b)  ((a) < (b) ? (a) : (b))
-#define MAX(a, b)  ((a) < (b) ? (b) : (a))
-#define LEN(a)     (sizeof(a) / sizeof(a[0]))
-#define DEFAULT(a, b)     (a) = (a) ? (a) : (b)    
-#define BETWEEN(x, a, b)  ((a) <= (x) && (x) <= (b))
-#define LIMIT(x, a, b)    (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
-#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
-#define IS_SET(flag) (term.mode & (flag))
-
-/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
-enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
-enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
-       CURSOR_SAVE, CURSOR_LOAD };
-enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
-enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
-enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8 };
-enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
-enum { SCREEN_UPDATE, SCREEN_REDRAW };
-enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
+#define STR_BUF_SIZ   ESC_BUF_SIZ
+#define STR_ARG_SIZ   ESC_ARG_SIZ
+#define XK_ANY_MOD    UINT_MAX
+#define XK_NO_MOD     0
+#define XK_SWITCH_MOD (1<<13)
+
+/* 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) || (c) == '\177')
+#define ISCONTROLC1(c)         (BETWEEN(c, 0x80, 0x9f))
+#define ISCONTROL(c)           (ISCONTROLC0(c) || ISCONTROLC1(c))
+#define ISDELIM(u)             (utf8strchr(worddelimiters, u) != NULL)
+#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)
+
+
+enum glyph_attribute {
+       ATTR_NULL       = 0,
+       ATTR_BOLD       = 1 << 0,
+       ATTR_FAINT      = 1 << 1,
+       ATTR_ITALIC     = 1 << 2,
+       ATTR_UNDERLINE  = 1 << 3,
+       ATTR_BLINK      = 1 << 4,
+       ATTR_REVERSE    = 1 << 5,
+       ATTR_INVISIBLE  = 1 << 6,
+       ATTR_STRUCK     = 1 << 7,
+       ATTR_WRAP       = 1 << 8,
+       ATTR_WIDE       = 1 << 9,
+       ATTR_WDUMMY     = 1 << 10,
+       ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
+};
+
+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 << 0,
+       MODE_INSERT      = 1 << 1,
+       MODE_APPKEYPAD   = 1 << 2,
+       MODE_ALTSCREEN   = 1 << 3,
+       MODE_CRLF        = 1 << 4,
+       MODE_MOUSEBTN    = 1 << 5,
+       MODE_MOUSEMOTION = 1 << 6,
+       MODE_REVERSE     = 1 << 7,
+       MODE_KBDLOCK     = 1 << 8,
+       MODE_HIDE        = 1 << 9,
+       MODE_ECHO        = 1 << 10,
+       MODE_APPCURSOR   = 1 << 11,
+       MODE_MOUSESGR    = 1 << 12,
+       MODE_8BIT        = 1 << 13,
+       MODE_BLINK       = 1 << 14,
+       MODE_FBLINK      = 1 << 15,
+       MODE_FOCUS       = 1 << 16,
+       MODE_MOUSEX10    = 1 << 17,
+       MODE_MOUSEMANY   = 1 << 18,
+       MODE_BRCKTPASTE  = 1 << 19,
+       MODE_PRINT       = 1 << 20,
+       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_FOCUSED = 2
+};
+
+enum selection_mode {
+       SEL_IDLE = 0,
+       SEL_EMPTY = 1,
+       SEL_READY = 2
+};
+
+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 uint_least32_t Rune;
+
+typedef XftDraw *Draw;
+typedef XftColor Color;

 
 typedef struct {
 
 typedef struct {

-       char c;     /* character code  */
-       char mode;  /* attribute flags */
-       int fg;     /* foreground      */
-       int bg;     /* background      */
-       char state; /* state flags     */
+       Rune u;           /* character code */
+       ushort mode;      /* attribute flags */
+       uint32_t fg;      /* foreground  */
+       uint32_t bg;      /* background  */

 } Glyph;
 
 } Glyph;
 

-typedef Glyph* Line;
+typedef Glyph *Line;

 
 typedef struct {
 
 typedef struct {

-       Glyph attr;      /* current char attributes */
+       Glyph attr; /* current char attributes */

        int x;
        int y;
        char state;
 } TCursor;
 
 /* CSI Escape sequence structs */
        int x;
        int y;
        char state;
 } TCursor;
 
 /* CSI Escape sequence structs */

-/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
+/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */

 typedef struct {
        char buf[ESC_BUF_SIZ]; /* raw string */
 typedef struct {
        char buf[ESC_BUF_SIZ]; /* raw string */

-       int len;                           /* raw string length */
+       int len;               /* raw string length */

        char priv;
        int arg[ESC_ARG_SIZ];
        char priv;
        int arg[ESC_ARG_SIZ];

-       int narg;                          /* nb of args */
-       char mode;
+       int narg;              /* nb of args */
+       char mode[2];

 } CSIEscape;
 
 } 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 {
 /* Internal representation of the screen */
 typedef struct {

-       int row;        /* nb row */  
-       int col;        /* nb col */
-       Line* line;     /* screen */
-       Line* alt;      /* alternate screen */
-       TCursor c;      /* cursor */
-       int top;        /* top    scroll limit */
-       int bot;        /* bottom scroll limit */
-       int mode;       /* terminal mode flags */
-       int esc;        /* escape state flags */
-       char title[ESC_TITLE_SIZ];
-       int titlelen;
+       int row;      /* nb row */
+       int col;      /* nb col */
+       Line *line;   /* screen */
+       Line *alt;    /* alternate screen */
+       int *dirty;  /* dirtyness of lines */
+       XftGlyphFontSpec *specbuf; /* font spec buffer used for rendering */
+       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 */
+       int numlock; /* lock numbers in keyboard */
+       int *tabs;

 } Term;
 
 /* Purely graphic info */
 typedef struct {
 } Term;
 
 /* Purely graphic info */
 typedef struct {

-       Display* dis;
+       Display *dpy;

        Colormap cmap;
        Window win;
        Colormap cmap;
        Window win;

-       Pixmap buf;
+       Drawable buf;
+       Atom xembed, wmdeletewin, netwmname, netwmpid;

        XIM xim;
        XIC xic;
        XIM xim;
        XIC xic;

+       Draw draw;
+       Visual *vis;
+       XSetWindowAttributes attrs;

        int scr;
        int scr;

-       int w;  /* window width  */
-       int h;  /* window height */
-       int bufw; /* pixmap width  */
-       int bufh; /* pixmap height */
+       int 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 */
        int ch; /* char height */
        int cw; /* char width  */
        char state; /* focus, redraw, visible */

-} XWindow; 
+       int cursor; /* cursor style */
+} XWindow;

 
 typedef struct {
 
 typedef struct {

-       KeySym k;
-       char s[ESC_BUF_SIZ];
-} Key;
+       uint b;
+       uint mask;
+       char *s;
+} Mousekey;

 
 

-/* Drawing Context */

 typedef struct {
 typedef struct {

-       unsigned long col[256];
-       XFontStruct* font;
-       XFontStruct* bfont;
-       GC gc;
-} DC;
+       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;

 
 

-/* TODO: use better name for vars... */

 typedef struct {
        int mode;
 typedef struct {
        int mode;

-       int bx, by;
-       int ex, ey;
-       struct {int x, y;}  b, e;
-       char *clip;
+       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 *primary, *clipboard;
+       Atom xtarget;
+       int alt;
+       struct timespec tclick1;
+       struct timespec tclick2;

 } Selection;
 
 } 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 clipcopy(const Arg *);
+static void clippaste(const Arg *);
+static void numlock(const Arg *);
+static void selpaste(const Arg *);
+static void xzoom(const Arg *);
+static void xzoomabs(const Arg *);
+static void xzoomreset(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"
 
 #include "config.h"
 

-static void die(const char *errstr, ...);
-static void draw(int);
+/* 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(void);
+static void drawregion(int, int, int, int);

 static void execsh(void);
 static void execsh(void);

+static void stty(void);

 static void sigchld(int);
 static void run(void);
 
 static void sigchld(int);
 static void run(void);
 


@@ -155,56 +370,124 @@ static void csidump(void);
 static void csihandle(void);
 static void csiparse(void);
 static void csireset(void);
 static void csihandle(void);
 static void csiparse(void);
 static void csireset(void);

-
+static int eschandle(uchar);
+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 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 tmoveto(int, int);

+static void tmoveato(int, int);

 static void tnew(int, int);
 static void tnew(int, int);

-static void tnewline(void);
-static void tputtab(void);
-static void tputc(char);
-static void tputs(char*, int);
+static void tnewline(int);
+static void tputtab(int);
+static void tputc(Rune);

 static void treset(void);
 static void tresize(int, int);
 static void tscrollup(int, int);
 static void tscrolldown(int, int);
 static void treset(void);
 static void tresize(int, int);
 static void tscrollup(int, int);
 static void tscrolldown(int, int);

-static void tsetattr(int*, int);
-static void tsetchar(char);
+static void tsetattr(int *, int);
+static void tsetchar(Rune, Glyph *, int, int);

 static void tsetscroll(int, int);
 static void tswapscreen(void);
 static void tsetscroll(int, int);
 static void tswapscreen(void);

-
+static void tsetdirt(int, int);
+static void tsetdirtattr(int);
+static void tsetmode(int, int, int *, int);
+static void tfulldirt(void);
+static void techo(Rune);
+static void tcontrolcode(uchar );
+static void tdectest(char );
+static int32_t tdefcolor(int *, int *, int);
+static void tdeftran(char);
+static inline int match(uint, uint);

 static void ttynew(void);
 static void ttyread(void);
 static void ttynew(void);
 static void ttyread(void);

-static void ttyresize(int, int);
+static void ttyresize(void);
+static void ttysend(char *, size_t);

 static void ttywrite(const char *, size_t);
 static void ttywrite(const char *, size_t);

+static void tstrsequence(uchar);

 
 

-static void xdraws(char *, Glyph, int, int, int);
+static inline ushort sixd_to_16bit(int);
+static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
+static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
+static void xdrawglyph(Glyph, 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 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 void xsettitle(char *);
+static void xresettitle(void);
+static void xsetpointermotion(int);

 static void xseturgency(int);
 static void xseturgency(int);

+static void xsetsel(char *, Time);
+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 void expose(XEvent *);
 static void visibility(XEvent *);
 static void unmap(XEvent *);

-static char* kmap(KeySym);
+static char *kmap(KeySym, uint);

 static void kpress(XEvent *);
 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 resize(XEvent *);
 static void focus(XEvent *);
 static void brelease(XEvent *);
 static void bpress(XEvent *);
 static void bmotion(XEvent *);

-static void selection_notify(XEvent *);
-static void selection_request(XEvent *);
+static void propnotify(XEvent *);
+static void selnotify(XEvent *);
+static void selclear(XEvent *);
+static void selrequest(XEvent *);
+
+static void selinit(void);
+static void selnormalize(void);
+static inline int selected(int, int);
+static char *getsel(void);
+static void selcopy(Time);
+static void selscroll(int, int);
+static void selsnap(int *, int *, int);
+static int x2col(int);
+static int y2row(int);
+static void getbuttoninfo(XEvent *);
+static void mousereport(XEvent *);
+
+static size_t utf8decode(char *, Rune *, size_t);
+static Rune utf8decodebyte(char, size_t *);
+static size_t utf8encode(Rune, char *);
+static char utf8encodebyte(Rune, size_t);
+static char *utf8strchr(char *s, Rune u);
+static size_t utf8validate(Rune *, 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,
 
 static void (*handler[LASTEvent])(XEvent *) = {
        [KeyPress] = kpress,

+       [ClientMessage] = cmessage,

        [ConfigureNotify] = resize,
        [VisibilityNotify] = visibility,
        [UnmapNotify] = unmap,
        [ConfigureNotify] = resize,
        [VisibilityNotify] = visibility,
        [UnmapNotify] = unmap,


@@ -214,1451 +497,3834 @@ static void (*handler[LASTEvent])(XEvent *) = {
        [MotionNotify] = bmotion,
        [ButtonPress] = bpress,
        [ButtonRelease] = brelease,
        [MotionNotify] = bmotion,
        [ButtonPress] = bpress,
        [ButtonRelease] = brelease,

-       [SelectionNotify] = selection_notify,
-       [SelectionRequest] = selection_request,
+/*
+ * Uncomment if you want the selection to disappear when you select something
+ * different in another window.
+ */
+/*     [SelectionClear] = selclear, */
+       [SelectionNotify] = selnotify,
+/*
+ * PropertyNotify is only turned on when there is some INCR transfer happening
+ * for the selection retrieval.
+ */
+       [PropertyNotify] = propnotify,
+       [SelectionRequest] = selrequest,

 };
 
 /* Globals */
 static DC dc;
 static XWindow xw;
 static Term term;
 };
 
 /* Globals */
 static DC dc;
 static XWindow xw;
 static Term term;

-static CSIEscape escseq;
+static CSIEscape csiescseq;
+static STREscape strescseq;

 static int cmdfd;
 static pid_t pid;
 static Selection sel;
 static int cmdfd;
 static pid_t pid;
 static Selection sel;

-static char *opt_cmd   = NULL;
+static int iofd = 1;
+static char **opt_cmd = NULL;
+static char *opt_io = NULL;

 static char *opt_title = NULL;
 static char *opt_title = NULL;

+static char *opt_embed = NULL;
+static char *opt_class = NULL;
+static char *opt_font = NULL;
+static char *opt_line = NULL;
+static int oldbutton = 3; /* button event on startup: 3 = release */
+
+static char *usedfont = NULL;
+static double usedfontsize = 0;
+static double defaultfontsize = 0;
+
+static uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
+static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+static Rune utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
+static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
+
+/* Font Ring Cache */
+enum {
+       FRC_NORMAL,
+       FRC_ITALIC,
+       FRC_BOLD,
+       FRC_ITALICBOLD
+};

 
 

-void
-selinit(void) {
-       sel.mode = 0;
-       sel.bx = -1;
-       sel.clip = NULL;
-}
+typedef struct {
+       XftFont *font;
+       int flags;
+       Rune unicodep;
+} Fontcache;

 
 

-static inline int selected(int x, int y) {
-       if(sel.ey == y && sel.by == y) {
-               int bx = MIN(sel.bx, sel.ex);
-               int ex = MAX(sel.bx, sel.ex);
-               return BETWEEN(x, bx, ex);
+/* 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, r;
+
+       while (len > 0) {
+               r = write(fd, s, len);
+               if (r < 0)
+                       return r;
+               len -= r;
+               s += r;

        }
        }

-       return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x)) 
-               || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
+
+       return aux;

 }
 
 }
 

-static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
-       if(b) 
-               *b = e->xbutton.button;
+void *
+xmalloc(size_t len)
+{
+       void *p = malloc(len);

 
 

-       *x = e->xbutton.x/xw.cw;
-       *y = e->xbutton.y/xw.ch;
-       sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
-       sel.b.y = MIN(sel.by, sel.ey);
-       sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
-       sel.e.y = MAX(sel.by, sel.ey);
-}
+       if (!p)
+               die("Out of memory\n");

 
 

-static void bpress(XEvent *e) {
-       sel.mode = 1;
-       sel.ex = sel.bx = e->xbutton.x/xw.cw;
-       sel.ey = sel.by = e->xbutton.y/xw.ch;
+       return p;

 }
 
 }
 

-static char *getseltext() {
-       char *str, *ptr;
-       int ls, x, y, sz;
-       if(sel.bx == -1)
-               return NULL;
-       sz = (term.col+1) * (sel.e.y-sel.b.y+1);
-       ptr = str = malloc(sz);
-       for(y = 0; y < term.row; y++) {
-               for(x = 0; x < term.col; x++)
-                       if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y)))
-                               *ptr = term.line[y][x].c, ptr++;
-               if(ls)
-                       *ptr = '\n', ptr++;
-       }
-       *ptr = 0;
-       return str;
+void *
+xrealloc(void *p, size_t len)
+{
+       if ((p = realloc(p, len)) == NULL)
+               die("Out of memory\n");
+
+       return p;

 }
 
 }
 

-static void selection_notify(XEvent *e) {
-       unsigned long nitems;
-       unsigned long length;
-       int format, res;
-       unsigned char *data;
-       Atom type;
-
-       res = XGetWindowProperty(xw.dis, xw.win, XA_PRIMARY, 0, 0, False, 
-                               AnyPropertyType, &type, &format, &nitems, &length, &data);
-       switch(res) {
-               case BadAtom:
-               case BadValue:
-               case BadWindow:
-                       fprintf(stderr, "Invalid paste, XGetWindowProperty0");
-                       return;
-       }
+char *
+xstrdup(char *s)
+{
+       if ((s = strdup(s)) == NULL)
+               die("Out of memory\n");

 
 

-       res = XGetWindowProperty(xw.dis, xw.win, XA_PRIMARY, 0, length, False,
-                               AnyPropertyType, &type, &format, &nitems, &length, &data);
-       switch(res) {
-               case BadAtom:
-               case BadValue:
-               case BadWindow:
-                       fprintf(stderr, "Invalid paste, XGetWindowProperty0");
-                       return;
-       }
+       return s;
+}

 
 

-       if(data) {
-               ttywrite((const char *) data, nitems * format / 8);
-               XFree(data);
+size_t
+utf8decode(char *c, Rune *u, size_t clen)
+{
+       size_t i, j, len, type;
+       Rune 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;

 }
 
 }
 

-static void selpaste() {
-       XConvertSelection(xw.dis, XA_PRIMARY, XA_STRING, XA_PRIMARY, xw.win, CurrentTime);
+Rune
+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;

 }
 
 }
 

-static void selection_request(XEvent *e)
+size_t
+utf8encode(Rune u, char *c)

 {
 {

-       XSelectionRequestEvent *xsre;
-       XSelectionEvent xev;
-       int res;
-       Atom xa_targets;
+       size_t len, i;

 
 

-       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;
+       len = utf8validate(&u, 0);
+       if (len > UTF_SIZ)
+               return 0;

 
 

-       xa_targets = XInternAtom(xw.dis, "TARGETS", 0);
-       if(xsre->target == xa_targets) {
-               /* respond with the supported type */
-               Atom string = XA_STRING;
-               res = XChangeProperty(xsre->display, xsre->requestor, xsre->property, XA_ATOM, 32,
-                               PropModeReplace, (unsigned char *) &string, 1);
-               switch(res) {
-                       case BadAlloc:
-                       case BadAtom:
-                       case BadMatch:
-                       case BadValue:
-                       case BadWindow:
-                               fprintf(stderr, "Error in selection_request, TARGETS");
-                               break;
-                       default:
-                               xev.property = xsre->property;
-               }
-       } else if(xsre->target == XA_STRING) {
-               res = XChangeProperty(xsre->display, xsre->requestor, xsre->property,
-                               xsre->target, 8, PropModeReplace, (unsigned char *) sel.clip,
-                               strlen(sel.clip));
-               switch(res) {
-                       case BadAlloc:
-                       case BadAtom:
-                       case BadMatch:
-                       case BadValue:
-                       case BadWindow:
-                               fprintf(stderr, "Error in selection_request, XA_STRING");
-                               break;
-                       default:
-                        xev.property = xsre->property;
-               }
+       for (i = len - 1; i != 0; --i) {
+               c[i] = utf8encodebyte(u, 0);
+               u >>= 6;

        }
        }

+       c[0] = utf8encodebyte(u, len);

 
 

-       /* all done, send a notification to the listener */
-       res = XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev);
-       switch(res) {
-               case 0:
-               case BadValue:
-               case BadWindow:
-                       fprintf(stderr, "Error in selection_requested, XSendEvent");
-       }
+       return len;

 }
 
 }
 

-static void selcopy(char *str) {
-       /* register the selection for both the clipboard and the primary */
-       Atom clipboard;
-       int res;
-
-       free(sel.clip);
-       sel.clip = str;
+char
+utf8encodebyte(Rune u, size_t i)
+{
+       return utfbyte[i] | (u & ~utfmask[i]);
+}

 
 

-       res = XSetSelectionOwner(xw.dis, XA_PRIMARY, xw.win, CurrentTime);
-       switch(res) {
-               case BadAtom:
-               case BadWindow:
-                       fprintf(stderr, "Invalid copy, XSetSelectionOwner");
-                       return;
-       }
+char *
+utf8strchr(char *s, Rune u)
+{
+       Rune r;
+       size_t i, j, len;

 
 

-       clipboard = XInternAtom(xw.dis, "CLIPBOARD", 0);
-       res = XSetSelectionOwner(xw.dis, clipboard, xw.win, CurrentTime);
-       switch(res) {
-               case BadAtom:
-               case BadWindow:
-                       fprintf(stderr, "Invalid copy, XSetSelectionOwner");
-                       return;
+       len = strlen(s);
+       for (i = 0, j = 0; i < len; i += j) {
+               if (!(j = utf8decode(&s[i], &r, len - i)))
+                       break;
+               if (r == u)
+                       return &(s[i]);

        }
 
        }
 

-       XFlush(xw.dis);
+       return NULL;

 }
 
 }
 

-/* TODO: doubleclick to select word */
-static void brelease(XEvent *e) {
-       int b;
-       sel.mode = 0;
-       getbuttoninfo(e, &b, &sel.ex, &sel.ey);
-       if(sel.bx==sel.ex && sel.by==sel.ey) {
-               sel.bx = -1;
-               if(b==2)
-                       selpaste();
-       } else {
-               if(b==1)
-                       selcopy(getseltext());
-       }
-       draw(1);
-}
+size_t
+utf8validate(Rune *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)
+               ;

 
 

-static void bmotion(XEvent *e) {
-       if (sel.mode) {
-               getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
-               draw(1);
-       }
+       return i;

 }
 
 }
 

-#ifdef DEBUG

 void
 void

-tdump(void) {
-       int row, col;
-       Glyph c;
+selinit(void)
+{
+       memset(&sel.tclick1, 0, sizeof(sel.tclick1));
+       memset(&sel.tclick2, 0, sizeof(sel.tclick2));
+       sel.mode = SEL_IDLE;
+       sel.ob.x = -1;
+       sel.primary = NULL;
+       sel.clipboard = NULL;
+       sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
+       if (sel.xtarget == None)
+               sel.xtarget = XA_STRING;
+}

 
 

-       for(row = 0; row < term.row; row++) {
-               for(col = 0; col < term.col; col++) {
-                       if(col == term.c.x && row == term.c.y)
-                               putchar('#');
-                       else {
-                               c = term.line[row][col];
-                               putchar(c.state & GLYPH_SET ? c.c : '.');
-                       }
-               }
-               putchar('\n');
-       }
+int
+x2col(int x)
+{
+       x -= borderpx;
+       x /= xw.cw;
+
+       return LIMIT(x, 0, term.col-1);

 }
 }

-#endif

 
 

-void
-die(const char *errstr, ...) {
-       va_list ap;
+int
+y2row(int y)
+{
+       y -= borderpx;
+       y /= xw.ch;

 
 

-       va_start(ap, errstr);
-       vfprintf(stderr, errstr, ap);
-       va_end(ap);
-       exit(EXIT_FAILURE);
+       return LIMIT(y, 0, term.row-1);

 }
 
 }
 

-void
-execsh(void) {
-       char *args[] = {getenv("SHELL"), "-i", NULL};
-       if(opt_cmd)
-               args[0] = opt_cmd, args[1] = NULL;
-       else
-               DEFAULT(args[0], SHELL);
-       putenv("TERM="TNAME);
-       execvp(args[0], args);
-}
-
-void 
-sigchld(int a) {
-       int stat = 0;
-       if(waitpid(pid, &stat, 0) < 0)
-               die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
-       if(WIFEXITED(stat))
-               exit(WEXITSTATUS(stat));
-       else
-               exit(EXIT_FAILURE);
+int
+tlinelen(int y)
+{
+       int i = term.col;
+
+       if (term.line[y][i - 1].mode & ATTR_WRAP)
+               return i;
+
+       while (i > 0 && term.line[y][i - 1].u == ' ')
+               --i;
+
+       return i;

 }
 
 void
 }
 
 void

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

 
 

-       switch(pid = fork()) {
-       case -1:
-               die("fork failed\n");
-               break;
-       case 0:
-               setsid(); /* create a new process group */
-               dup2(s, STDIN_FILENO);
-               dup2(s, STDOUT_FILENO);
-               dup2(s, STDERR_FILENO);
-               if(ioctl(s, TIOCSCTTY, NULL) < 0)
-                       die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
-               close(s);
-               close(m);
-               execsh();
-               break;
-       default:
-               close(s);
-               cmdfd = m;
-               signal(SIGCHLD, sigchld);
+       if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
+               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;
+       } else {
+               sel.nb.x = MIN(sel.ob.x, sel.oe.x);
+               sel.ne.x = MAX(sel.ob.x, sel.oe.x);

        }
        }

-}
+       sel.nb.y = MIN(sel.ob.y, sel.oe.y);
+       sel.ne.y = MAX(sel.ob.y, sel.oe.y);

 
 

-void
-dump(char c) {
-       static int col;
-       fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
-       if(++col % 10 == 0)
-               fprintf(stderr, "\n");
+       selsnap(&sel.nb.x, &sel.nb.y, -1);
+       selsnap(&sel.ne.x, &sel.ne.y, +1);
+
+       /* 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;

 }
 
 }
 

-void
-ttyread(void) {
-       char buf[BUFSIZ];
-       int ret;
+int
+selected(int x, int y)
+{
+       if (sel.mode == SEL_EMPTY)
+               return 0;

 
 

-       if((ret = read(cmdfd, buf, LEN(buf))) < 0)
-               die("Couldn't read from shell: %s\n", SERRNO);
-       else
-               tputs(buf, ret);
-}
+       if (sel.type == SEL_RECTANGULAR)
+               return BETWEEN(y, sel.nb.y, sel.ne.y)
+                   && BETWEEN(x, sel.nb.x, sel.ne.x);

 
 

-void
-ttywrite(const char *s, size_t n) {
-       if(write(cmdfd, s, n) == -1)
-               die("write error on tty: %s\n", SERRNO);
+       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
 }
 
 void

-ttyresize(int x, int y) {
-       struct winsize w;
+selsnap(int *x, int *y, int direction)
+{
+       int newx, newy, xt, yt;
+       int delim, prevdelim;
+       Glyph *gp, *prevgp;
+
+       switch (sel.snap) {
+       case SNAP_WORD:
+               /*
+                * Snap around if the word wraps around at the end or
+                * beginning of a line.
+                */
+               prevgp = &term.line[*y][*x];
+               prevdelim = ISDELIM(prevgp->u);
+               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;

 
 

-       w.ws_row = term.row;
-       w.ws_col = term.col;
-       w.ws_xpixel = w.ws_ypixel = 0;
-       if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
-               fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
-}
+                               if (direction > 0)
+                                       yt = *y, xt = *x;
+                               else
+                                       yt = newy, xt = newx;
+                               if (!(term.line[yt][xt].mode & ATTR_WRAP))
+                                       break;
+                       }

 
 

-void
-tcursor(int mode) {
-       static TCursor c;
+                       if (newx >= tlinelen(newy))
+                               break;

 
 

-       if(mode == CURSOR_SAVE)
-               c = term.c;
-       else if(mode == CURSOR_LOAD)
-               term.c = c, tmoveto(c.x, c.y);
-}
+                       gp = &term.line[newy][newx];
+                       delim = ISDELIM(gp->u);
+                       if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
+                                       || (delim && gp->u != prevgp->u)))
+                               break;

 
 

-void
-treset(void) {
-       term.c = (TCursor){{
-               .mode = ATTR_NULL, 
-               .fg = DefaultFG, 
-               .bg = DefaultBG
-       }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
-       
-       term.top = 0, term.bot = term.row - 1;
-       term.mode = MODE_WRAP;
-       tclearregion(0, 0, term.col-1, term.row-1);
+                       *x = newx;
+                       *y = newy;
+                       prevgp = gp;
+                       prevdelim = delim;
+               }
+               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) {
+                       for (; *y > 0; *y += direction) {
+                               if (!(term.line[*y-1][term.col-1].mode
+                                               & ATTR_WRAP)) {
+                                       break;
+                               }
+                       }
+               } else if (direction > 0) {
+                       for (; *y < term.row-1; *y += direction) {
+                               if (!(term.line[*y][term.col-1].mode
+                                               & ATTR_WRAP)) {
+                                       break;
+                               }
+                       }
+               }
+               break;
+       }

 }
 
 void
 }
 
 void

-tnew(int col, int row) {
-       /* set screen size */
-       term.row = row, term.col = col;
-       term.line = malloc(term.row * sizeof(Line));
-       term.alt  = malloc(term.row * sizeof(Line));
-       for(row = 0 ; row < term.row; row++) {
-               term.line[row] = malloc(term.col * sizeof(Glyph));
-               term.alt [row] = malloc(term.col * sizeof(Glyph));
+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);
+       selnormalize();
+
+       sel.type = SEL_REGULAR;
+       for (type = 1; type < LEN(selmasks); ++type) {
+               if (match(selmasks[type], state)) {
+                       sel.type = type;
+                       break;
+               }

        }
        }

-       /* setup screen */
-       treset();

 }
 
 void
 }
 
 void

-tswapscreen(void) {
-       Line* tmp = term.line;
-       term.line = term.alt;
-       term.alt = tmp;
-       term.mode ^= MODE_ALTSCREEN;
-}
+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;

 
 

-void
-tscrolldown(int orig, int n) {
-       int i;
-       Line temp;
-       
-       LIMIT(n, 0, term.bot-orig+1);
+               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;
+               }
+       }

 
 

-       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;
+       if (!IS_SET(MODE_MOUSEX10)) {
+               button += ((state & ShiftMask  ) ? 4  : 0)
+                       + ((state & Mod4Mask   ) ? 8  : 0)
+                       + ((state & ControlMask) ? 16 : 0);

        }
        }

-}

 
 

-void
-tscrollup(int orig, int n) {
-       int i;
-       Line temp;
-       LIMIT(n, 0, term.bot-orig+1);
-       
-       tclearregion(0, orig, term.col-1, orig+n-1);
-       
-       for(i = orig; i <= term.bot-n; i++) { 
-                temp = term.line[i];
-                term.line[i] = term.line[i+n]; 
-                term.line[i+n] = temp;
+       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;

        }
        }

-}

 
 

-void
-tnewline(void) {
-       int x = term.c.x+1 < term.col ? term.c.x : 0;
-       int y = term.c.y;
-       if(term.c.y == term.bot)
-               tscrollup(term.top, 1);
-       else
-               y++;
-       tmoveto(x, y);
+       ttywrite(buf, len);

 }
 
 void
 }
 
 void

-csiparse(void) {
-       /* int noarg = 1; */
-       char *p = escseq.buf;
+bpress(XEvent *e)
+{
+       struct timespec now;
+       Mousekey *mk;

 
 

-       escseq.narg = 0;
-       if(*p == '?')
-               escseq.priv = 1, p++;
-       
-       while(p < escseq.buf+escseq.len) {
-               while(isdigit(*p)) {
-                       escseq.arg[escseq.narg] *= 10;
-                       escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
-               }
-               if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
-                       escseq.narg++, p++;
-               else {
-                       escseq.mode = *p;
-                       escseq.narg++;
+       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;
                }
        }
                        return;
                }
        }

-}

 
 

-void
-tmoveto(int x, int y) {
-       LIMIT(x, 0, term.col-1);
-       LIMIT(y, 0, term.row-1);
-       term.c.state &= ~CURSOR_WRAPNEXT;
-       term.c.x = x;
-       term.c.y = y;
-}
+       if (e->xbutton.button == Button1) {
+               clock_gettime(CLOCK_MONOTONIC, &now);
+
+               /* Clear previous selection, logically and visually. */
+               selclear(NULL);
+               sel.mode = SEL_EMPTY;
+               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;
+               }
+               selnormalize();

 
 

-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 |= GLYPH_SET;
+               if (sel.snap != 0)
+                       sel.mode = SEL_READY;
+               tsetdirt(sel.nb.y, sel.ne.y);
+               sel.tclick2 = sel.tclick1;
+               sel.tclick1 = now;
+       }

 }
 
 }
 

-void
-tclearregion(int x1, int y1, int x2, int y2) {
-       int x, y, temp;
+char *
+getsel(void)
+{
+       char *str, *ptr;
+       int y, bufsize, lastx, linelen;
+       Glyph *gp, *last;

 
 

-       if(x1 > x2)
-               temp = x1, x1 = x2, x2 = temp;
-       if(y1 > y2)
-               temp = y1, y1 = y2, y2 = temp;
+       if (sel.ob.x == -1)
+               return NULL;

 
 

-       LIMIT(x1, 0, term.col-1);
-       LIMIT(x2, 0, term.col-1);
-       LIMIT(y1, 0, term.row-1);
-       LIMIT(y2, 0, term.row-1);
+       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; 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)];
+               while (last >= gp && last->u == ' ')
+                       --last;
+
+               for ( ; gp <= last; ++gp) {
+                       if (gp->mode & ATTR_WDUMMY)
+                               continue;
+
+                       ptr += utf8encode(gp->u, ptr);
+               }
+
+               /*
+                * 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 ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
+                       *ptr++ = '\n';
+       }
+       *ptr = 0;
+       return str;
+}

 
 

-       for(y = y1; y <= y2; y++)
-               for(x = x1; x <= x2; x++)
-                       term.line[y][x].state = 0;
+void
+selcopy(Time t)
+{
+       xsetsel(getsel(), t);

 }
 
 void
 }
 
 void

-tdeletechar(int n) {
-       int src = term.c.x + n;
-       int dst = term.c.x;
-       int size = term.col - src;
+propnotify(XEvent *e)
+{
+       XPropertyEvent *xpev;
+       Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+
+       xpev = &e->xproperty;
+       if (xpev->state == PropertyNewValue &&
+                       (xpev->atom == XA_PRIMARY ||
+                        xpev->atom == clipboard)) {
+               selnotify(e);
+       }
+}

 
 

-       if(src >= term.col) {
-               tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+void
+selnotify(XEvent *e)
+{
+       ulong nitems, ofs, rem;
+       int format;
+       uchar *data, *last, *repl;
+       Atom type, incratom, property;
+
+       incratom = XInternAtom(xw.dpy, "INCR", 0);
+
+       ofs = 0;
+       if (e->type == SelectionNotify) {
+               property = e->xselection.property;
+       } else if(e->type == PropertyNotify) {
+               property = e->xproperty.atom;
+       } else {

                return;
        }
                return;
        }

-       memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
-       tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
+       if (property == None)
+               return;
+
+       do {
+               if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
+                                       BUFSIZ/4, False, AnyPropertyType,
+                                       &type, &format, &nitems, &rem,
+                                       &data)) {
+                       fprintf(stderr, "Clipboard allocation failed\n");
+                       return;
+               }
+
+               if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
+                       /*
+                        * If there is some PropertyNotify with no data, then
+                        * this is the signal of the selection owner that all
+                        * data has been transferred. We won't need to receive
+                        * PropertyNotify events anymore.
+                        */
+                       MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
+                       XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
+                                       &xw.attrs);
+               }
+
+               if (type == incratom) {
+                       /*
+                        * Activate the PropertyNotify events so we receive
+                        * when the selection owner does send us the next
+                        * chunk of data.
+                        */
+                       MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
+                       XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
+                                       &xw.attrs);
+
+                       /*
+                        * Deleting the property is the transfer start signal.
+                        */
+                       XDeleteProperty(xw.dpy, xw.win, (int)property);
+                       continue;
+               }
+
+               /*
+                * 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);
+
+       /*
+        * Deleting the property again tells the selection owner to send the
+        * next data chunk in the property.
+        */
+       if (e->type == PropertyNotify)
+               XDeleteProperty(xw.dpy, xw.win, (int)property);

 }
 
 void
 }
 
 void

-tinsertblank(int n) {
-       int src = term.c.x;
-       int dst = src + n;
-       int size = term.col - dst;
+selpaste(const Arg *dummy)
+{
+       XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
+                       xw.win, CurrentTime);
+}

 
 

-       if(dst >= term.col) {
-               tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
-               return;
+void
+clipcopy(const Arg *dummy)
+{
+       Atom clipboard;
+
+       if (sel.clipboard != NULL)
+               free(sel.clipboard);
+
+       if (sel.primary != NULL) {
+               sel.clipboard = xstrdup(sel.primary);
+               clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+               XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);

        }
        }

-       memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
-       tclearregion(src, term.c.y, dst - 1, term.c.y);

 }
 
 void
 }
 
 void

-tinsertblankline(int n) {
-       if(term.c.y < term.top || term.c.y > term.bot)
-               return;
+clippaste(const Arg *dummy)
+{
+       Atom clipboard;

 
 

-       tscrolldown(term.c.y, n);
+       clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+       XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
+                       xw.win, CurrentTime);

 }
 
 void
 }
 
 void

-tdeleteline(int n) {
-       if(term.c.y < term.top || term.c.y > term.bot)
+selclear(XEvent *e)
+{
+       if (sel.ob.x == -1)

                return;
                return;

-
-       tscrollup(term.c.y, n);
+       sel.mode = SEL_IDLE;
+       sel.ob.x = -1;
+       tsetdirt(sel.nb.y, sel.ne.y);

 }
 
 void
 }
 
 void

-tsetattr(int *attr, int l) {
-       int i;
+selrequest(XEvent *e)
+{
+       XSelectionRequestEvent *xsre;
+       XSelectionEvent xev;
+       Atom xa_targets, string, clipboard;
+       char *seltext;

 
 

-       for(i = 0; i < l; i++) {
-               switch(attr[i]) {
-               case 0:
-                       term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
-                       term.c.attr.fg = DefaultFG;
-                       term.c.attr.bg = DefaultBG;
-                       break;
-               case 1:
-                       term.c.attr.mode |= ATTR_BOLD;   
-                       break;
-               case 4: 
-                       term.c.attr.mode |= ATTR_UNDERLINE;
-                       break;
-               case 7: 
-                       term.c.attr.mode |= ATTR_REVERSE;       
-                       break;
-               case 22: 
-                       term.c.attr.mode &= ~ATTR_BOLD;  
-                       break;
-               case 24: 
-                       term.c.attr.mode &= ~ATTR_UNDERLINE;
-                       break;
-               case 27: 
-                       term.c.attr.mode &= ~ATTR_REVERSE;       
-                       break;
-               case 38:
-                       if (i + 2 < l && attr[i + 1] == 5) {
-                               i += 2;
-                               if (BETWEEN(attr[i], 0, 255))
-                                       term.c.attr.fg = attr[i];
-                               else
-                                       fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
-                       }
-                       else
-                               fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]); 
-                       break;
-               case 39:
-                       term.c.attr.fg = DefaultFG;
-                       break;
-               case 48:
-                       if (i + 2 < l && attr[i + 1] == 5) {
-                               i += 2;
-                               if (BETWEEN(attr[i], 0, 255))
-                                       term.c.attr.bg = attr[i];
-                               else
-                                       fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
-                       }
-                       else
-                               fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]); 
-                       break;
-               case 49:
-                       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.fg = attr[i] - 100 + 8;
-                       else 
-                               fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
-                       
-                       break;
+       xsre = (XSelectionRequestEvent *) e;
+       xev.type = SelectionNotify;
+       xev.requestor = xsre->requestor;
+       xev.selection = xsre->selection;
+       xev.target = xsre->target;
+       xev.time = xsre->time;
+       if (xsre->property == None)
+               xsre->property = xsre->target;
+
+       /* 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 || xsre->target == XA_STRING) {
+               /*
+                * xith XA_STRING non ascii characters may be incorrect in the
+                * requestor. It is not our problem, use utf8.
+                */
+               clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+               if (xsre->selection == XA_PRIMARY) {
+                       seltext = sel.primary;
+               } else if (xsre->selection == clipboard) {
+                       seltext = sel.clipboard;
+               } else {
+                       fprintf(stderr,
+                               "Unhandled clipboard selection 0x%lx\n",
+                               xsre->selection);
+                       return;
+               }
+               if (seltext != NULL) {
+                       XChangeProperty(xsre->display, xsre->requestor,
+                                       xsre->property, xsre->target,
+                                       8, PropModeReplace,
+                                       (uchar *)seltext, strlen(seltext));
+                       xev.property = xsre->property;

                }
        }
                }
        }

+
+       /* all done, send a notification to the listener */
+       if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
+               fprintf(stderr, "Error sending SelectionNotify event\n");

 }
 
 void
 }
 
 void

-tsetscroll(int t, int b) {
-       int temp;
+xsetsel(char *str, Time t)
+{
+       free(sel.primary);
+       sel.primary = str;

 
 

-       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;    
+       XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
+       if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
+               selclear(0);

 }
 
 void
 }
 
 void

-csihandle(void) {
-       switch(escseq.mode) {
-       default:
-       unknown:
-               printf("erresc: unknown csi ");
-               csidump();
-               /* die(""); */
-               break;
-       case '@': /* ICH -- Insert <n> blank char */
-               DEFAULT(escseq.arg[0], 1);
-               tinsertblank(escseq.arg[0]);
-               break;
-       case 'A': /* CUU -- Cursor <n> Up */
-       case 'e':
-               DEFAULT(escseq.arg[0], 1);
-               tmoveto(term.c.x, term.c.y-escseq.arg[0]);
-               break;
-       case 'B': /* CUD -- Cursor <n> Down */
-               DEFAULT(escseq.arg[0], 1);
-               tmoveto(term.c.x, term.c.y+escseq.arg[0]);
-               break;
-       case 'C': /* CUF -- Cursor <n> Forward */
-       case 'a':
-               DEFAULT(escseq.arg[0], 1);
-               tmoveto(term.c.x+escseq.arg[0], term.c.y);
-               break;
-       case 'D': /* CUB -- Cursor <n> Backward */
-               DEFAULT(escseq.arg[0], 1);
-               tmoveto(term.c.x-escseq.arg[0], term.c.y);
-               break;
-       case 'E': /* CNL -- Cursor <n> Down and first col */
-               DEFAULT(escseq.arg[0], 1);
-               tmoveto(0, term.c.y+escseq.arg[0]);
-               break;
-       case 'F': /* CPL -- Cursor <n> Up and first col */
-               DEFAULT(escseq.arg[0], 1);
-               tmoveto(0, term.c.y-escseq.arg[0]);
-               break;
-       case 'G': /* CHA -- Move to <col> */
-       case '`': /* XXX: HPA -- same? */
-               DEFAULT(escseq.arg[0], 1);
-               tmoveto(escseq.arg[0]-1, term.c.y);
-               break;
-       case 'H': /* CUP -- Move to <row> <col> */
-       case 'f': /* XXX: HVP -- same? */
-               DEFAULT(escseq.arg[0], 1);
-               DEFAULT(escseq.arg[1], 1);
-               tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
-               break;
-       /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
-       case 'J': /* ED -- Clear screen */
-               switch(escseq.arg[0]) {
-               case 0: /* below */
-                       tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
-                       break;
-               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;
-               default:
-                       goto unknown;
-               }
-               break;
-       case 'K': /* EL -- Clear line */
-               switch(escseq.arg[0]) {
-               case 0: /* right */
-                       tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
-                       break;
-               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;
-       case 'S': /* SU -- Scroll <n> line up */
-               DEFAULT(escseq.arg[0], 1);
-               tscrollup(term.top, escseq.arg[0]);
-               break;
-       case 'T': /* SD -- Scroll <n> line down */
-               DEFAULT(escseq.arg[0], 1);
-               tscrolldown(term.top, escseq.arg[0]);
-               break;
-       case 'L': /* IL -- Insert <n> blank lines */
-               DEFAULT(escseq.arg[0], 1);
-               tinsertblankline(escseq.arg[0]);
-               break;
-       case 'l': /* RM -- Reset Mode */
-               if(escseq.priv) {
-                       switch(escseq.arg[0]) {
-                       case 1:
-                               term.mode &= ~MODE_APPKEYPAD;
-                               break;
-                       case 5: /* TODO: DECSCNM -- Remove reverse video */
-                               break;
-                       case 7:
-                               term.mode &= ~MODE_WRAP;
-                               break;
-                       case 12: /* att610 -- Stop blinking cursor (IGNORED) */
-                               break;
-                       case 25:
-                               term.c.state |= CURSOR_HIDE;
-                               break;
-                       case 1049: /* = 1047 and 1048 */
-                       case 1047:
-                               if(IS_SET(MODE_ALTSCREEN)) {
-                                       tclearregion(0, 0, term.col-1, term.row-1);
-                                       tswapscreen();
-                               }
-                               if(escseq.arg[0] == 1047)
-                                       break;
-                       case 1048:
-                               tcursor(CURSOR_LOAD);
-                               break;
-                       default:
-                               goto unknown;
-                       }
-               } else {
-                       switch(escseq.arg[0]) {
-                       case 4:
-                               term.mode &= ~MODE_INSERT;
-                               break;
-                       default:
-                               goto unknown;
-                       }
-               }
-               break;
-       case 'M': /* DL -- Delete <n> lines */
-               DEFAULT(escseq.arg[0], 1);
-               tdeleteline(escseq.arg[0]);
-               break;
-       case 'X': /* ECH -- Erase <n> char */
-               DEFAULT(escseq.arg[0], 1);
-               tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
-               break;
-       case 'P': /* DCH -- Delete <n> char */
-               DEFAULT(escseq.arg[0], 1);
-               tdeletechar(escseq.arg[0]);
-               break;
-       /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
-       case 'd': /* VPA -- Move to <row> */
-               DEFAULT(escseq.arg[0], 1);
-               tmoveto(term.c.x, escseq.arg[0]-1);
-               break;
-       case 'h': /* SM -- Set terminal mode */
-               if(escseq.priv) {
-                       switch(escseq.arg[0]) {
-                       case 1:
-                               term.mode |= MODE_APPKEYPAD;
-                               break;
-                       case 5: /* DECSCNM -- Reverve video */
-                               /* TODO: set REVERSE on the whole screen (f) */
-                               break;
-                       case 7:
-                               term.mode |= MODE_WRAP;
-                               break;
-                       case 12: /* att610 -- Start blinking cursor (IGNORED) */
-                                /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
-                               if(escseq.narg > 1 && escseq.arg[1] != 25)
-                                       break;
-                       case 25:
-                               term.c.state &= ~CURSOR_HIDE;
-                               break;
-                       case 1049: /* = 1047 and 1048 */
-                       case 1047:
-                               if(IS_SET(MODE_ALTSCREEN))
-                                       tclearregion(0, 0, term.col-1, term.row-1);
-                               else
-                                       tswapscreen();
-                               if(escseq.arg[0] == 1047)
-                                       break;
-                       case 1048:
-                               tcursor(CURSOR_SAVE);
-                               break;
-                       default: goto unknown;
-                       }
-               } else {
-                       switch(escseq.arg[0]) {
-                       case 4:
-                               term.mode |= MODE_INSERT;
-                               break;
-                       default: goto unknown;
-                       }
-               };
-               break;
-       case 'm': /* SGR -- Terminal attribute (color) */
-               tsetattr(escseq.arg, escseq.narg);
-               break;
-       case 'r': /* DECSTBM -- Set Scrolling Region */
-               if(escseq.priv)
-                       goto unknown;
-               else {
-                       DEFAULT(escseq.arg[0], 1);
-                       DEFAULT(escseq.arg[1], term.row);
-                       tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
-                       tmoveto(0, 0);
-               }
-               break;
-       case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
-               tcursor(CURSOR_SAVE);
-               break;
-       case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
-               tcursor(CURSOR_LOAD);
-               break;
+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 == SEL_READY) {
+                       getbuttoninfo(e);
+                       selcopy(e->xbutton.time);
+               } else
+                       selclear(NULL);
+               sel.mode = SEL_IDLE;
+               tsetdirt(sel.nb.y, sel.ne.y);

        }
 }
 
 void
        }
 }
 
 void

-csidump(void) { 
-       int i;
-       printf("ESC [ %s", escseq.priv ? "? " : "");
-       if(escseq.narg)
-               for(i = 0; i < escseq.narg; i++)
-                       printf("%d ", escseq.arg[i]);
-       if(escseq.mode)
-               putchar(escseq.mode);
-       putchar('\n');
+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 = SEL_READY;
+       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
 }
 
 void

-csireset(void) {
-       memset(&escseq, 0, sizeof(escseq));
+die(const char *errstr, ...)
+{
+       va_list ap;
+
+       va_start(ap, errstr);
+       vfprintf(stderr, errstr, ap);
+       va_end(ap);
+       exit(1);

 }
 
 void
 }
 
 void

-tputtab(void) {
-       int space = TAB - term.c.x % TAB;
-       tmoveto(term.c.x + space, term.c.y);
+execsh(void)
+{
+       char **args, *sh, *prog;
+       const struct passwd *pw;
+       char buf[sizeof(long) * 8 + 1];
+
+       errno = 0;
+       if ((pw = getpwuid(getuid())) == NULL) {
+               if (errno)
+                       die("getpwuid:%s\n", strerror(errno));
+               else
+                       die("who are you?\n");
+       }
+
+       if ((sh = getenv("SHELL")) == NULL)
+               sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
+
+       if (opt_cmd)
+               prog = opt_cmd[0];
+       else if (utmp)
+               prog = utmp;
+       else
+               prog = sh;
+       args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
+
+       snprintf(buf, sizeof(buf), "%lu", xw.win);
+
+       unsetenv("COLUMNS");
+       unsetenv("LINES");
+       unsetenv("TERMCAP");
+       setenv("LOGNAME", pw->pw_name, 1);
+       setenv("USER", pw->pw_name, 1);
+       setenv("SHELL", sh, 1);
+       setenv("HOME", pw->pw_dir, 1);
+       setenv("TERM", termname, 1);
+       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);
+
+       execvp(prog, args);
+       _exit(1);

 }
 
 void
 }
 
 void

-tputc(char c) {
-       if(term.esc & ESC_START) {
-               if(term.esc & ESC_CSI) {
-                       escseq.buf[escseq.len++] = c;
-                       if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
-                               term.esc = 0;
-                               csiparse(), csihandle();
-                       }
-                       /* TODO: handle other OSC */
-               } else if(term.esc & ESC_OSC) { 
-                       if(c == ';') {
-                               term.titlelen = 0;
-                               term.esc = ESC_START | ESC_TITLE;
+sigchld(int a)
+{
+       int stat;
+       pid_t p;
+
+       if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
+               die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
+
+       if (pid != p)
+               return;
+
+       if (!WIFEXITED(stat) || WEXITSTATUS(stat))
+               die("child finished with error '%d'\n", stat);
+       exit(0);
+}
+
+
+void
+stty(void)
+{
+       char cmd[_POSIX_ARG_MAX], **p, *q, *s;
+       size_t n, siz;
+
+       if ((n = strlen(stty_args)) > sizeof(cmd)-1)
+               die("incorrect stty parameters\n");
+       memcpy(cmd, stty_args, n);
+       q = cmd + n;
+       siz = sizeof(cmd) - n;
+       for (p = opt_cmd; p && (s = *p); ++p) {
+               if ((n = strlen(s)) > siz-1)
+                       die("stty parameter length too long\n");
+               *q++ = ' ';
+               q = memcpy(q, s, n);
+               q += n;
+               siz-= n + 1;
+       }
+       *q = '\0';
+       if (system(cmd) != 0)
+           perror("Couldn't call stty");
+}
+
+void
+ttynew(void)
+{
+       int m, s;
+       struct winsize w = {term.row, term.col, 0, 0};
+
+       if (opt_io) {
+               term.mode |= MODE_PRINT;
+               iofd = (!strcmp(opt_io, "-")) ?
+                         1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
+               if (iofd < 0) {
+                       fprintf(stderr, "Error opening %s:%s\n",
+                               opt_io, strerror(errno));
+               }
+       }
+
+       if (opt_line) {
+               if ((cmdfd = open(opt_line, O_RDWR)) < 0)
+                       die("open line failed: %s\n", strerror(errno));
+               close(0);
+               dup(cmdfd);
+               stty();
+               return;
+       }
+
+       /* 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");
+               break;
+       case 0:
+               close(iofd);
+               setsid(); /* create a new process group */
+               dup2(s, 0);
+               dup2(s, 1);
+               dup2(s, 2);
+               if (ioctl(s, TIOCSCTTY, NULL) < 0)
+                       die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
+               close(s);
+               close(m);
+               execsh();
+               break;
+       default:
+               close(s);
+               cmdfd = m;
+               signal(SIGCHLD, sigchld);
+               break;
+       }
+}
+
+void
+ttyread(void)
+{
+       static char buf[BUFSIZ];
+       static int buflen = 0;
+       char *ptr;
+       int charsize; /* size of utf8 char in bytes */
+       Rune unicodep;
+       int ret;
+
+       /* append read bytes to unprocessed bytes */
+       if ((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
+               die("Couldn't read from shell: %s\n", strerror(errno));
+
+       /* process every complete utf8 char */
+       buflen += ret;
+       ptr = buf;
+       while ((charsize = utf8decode(ptr, &unicodep, buflen))) {
+               tputc(unicodep);
+               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)
+{
+       fd_set wfd;
+       struct timespec tv;
+       ssize_t r;
+
+       /*
+        * Remember that we are using a pty, which might be a modem line.
+        * Writing too much will clog the line. That's why we are doing this
+        * dance.
+        * FIXME: Migrate the world to Plan 9.
+        */
+       while (n > 0) {
+               FD_ZERO(&wfd);
+               FD_SET(cmdfd, &wfd);
+               tv.tv_sec = 0;
+               tv.tv_nsec = 0;
+
+               /* Check if we can write. */
+               if (pselect(cmdfd+1, NULL, &wfd, NULL, &tv, NULL) < 0) {
+                       if (errno == EINTR)
+                               continue;
+                       die("select failed: %s\n", strerror(errno));
+               }
+               if(!FD_ISSET(cmdfd, &wfd)) {
+                       /* No, then free some buffer space. */
+                       ttyread();
+               } else {
+                       /*
+                        * Only write 256 bytes at maximum. This seems to be a
+                        * reasonable value for a serial line. Bigger values
+                        * might clog the I/O.
+                        */
+                       r = write(cmdfd, s, (n < 256)? n : 256);
+                       if (r < 0) {
+                               die("write error on tty: %s\n",
+                                               strerror(errno));

                        }
                        }

-               } else if(term.esc & ESC_TITLE) {
-                       if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
-                               term.esc = 0;
-                               term.title[term.titlelen] = '\0';
-                               XStoreName(xw.dis, xw.win, term.title);
+                       if (r < n) {
+                               /*
+                                * We weren't able to write out everything.
+                                * This means the buffer is getting full
+                                * again. Empty it.
+                                */
+                               ttyread();
+                               n -= r;
+                               s += r;

                        } else {
                        } else {

-                               term.title[term.titlelen++] = c;
-                       }
-               } else if(term.esc & ESC_ALTCHARSET) {
-                       switch(c) {
-                       case '0': /* Line drawing crap */
-                               term.c.attr.mode |= ATTR_GFX;
+                               /* All bytes have been written. */

                                break;
                                break;

-                       case 'B': /* Back to regular text */
-                               term.c.attr.mode &= ~ATTR_GFX;
+                       }
+               }
+       }
+}
+
+void
+ttysend(char *s, size_t n)
+{
+       int len;
+       Rune u;
+
+       ttywrite(s, n);
+       if (IS_SET(MODE_ECHO))
+               while ((len = utf8decode(s, &u, n)) > 0) {
+                       techo(u);
+                       n -= len;
+                       s += len;
+               }
+}
+
+void
+ttyresize(void)
+{
+       struct winsize w;
+
+       w.ws_row = term.row;
+       w.ws_col = term.col;
+       w.ws_xpixel = xw.tw;
+       w.ws_ypixel = xw.th;
+       if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
+               fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
+}
+
+int
+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;
+               }
+       }
+
+       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
+tsetdirtattr(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) {
+                               tsetdirt(i, i);

                                break;
                                break;

-                       default:
-                               printf("esc unhandled charset: ESC ( %c\n", c);

                        }
                        }

-                       term.esc = 0;
+               }
+       }
+}
+
+void
+tfulldirt(void)
+{
+       tsetdirt(0, term.row-1);
+}
+
+void
+tcursor(int mode)
+{
+       static TCursor c[2];
+       int 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);
+       }
+}
+
+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, CS_USA, sizeof(term.trantbl));
+       term.charset = 0;
+
+       for (i = 0; i < 2; i++) {
+               tmoveto(0, 0);
+               tcursor(CURSOR_SAVE);
+               tclearregion(0, 0, term.col-1, term.row-1);
+               tswapscreen();
+       }
+}
+
+void
+tnew(int col, int row)
+{
+       term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
+       tresize(col, row);
+       term.numlock = 1;
+
+       treset();
+}
+
+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;
+       }
+
+       selscroll(orig, n);
+}
+
+void
+tscrollup(int orig, int n)
+{
+       int i;
+       Line temp;
+
+       LIMIT(n, 0, term.bot-orig+1);
+
+       tclearregion(0, orig, term.col-1, orig+n-1);
+       tsetdirt(orig+n, term.bot);
+
+       for (i = orig; i <= term.bot-n; i++) {
+               temp = term.line[i];
+               term.line[i] = term.line[i+n];
+               term.line[i+n] = temp;
+       }
+
+       selscroll(orig, -n);
+}
+
+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 {
                } else {

-                       switch(c) {
-                       case '[':
-                               term.esc |= ESC_CSI;
-                               break;
-                       case ']':
-                               term.esc |= ESC_OSC;
-                               break;
-                       case '(':
-                               term.esc |= ESC_ALTCHARSET;
-                               break;
-                       case 'D': /* IND -- Linefeed */
-                               if(term.c.y == term.bot)
-                                       tscrollup(term.top, 1);
-                               else
-                                       tmoveto(term.c.x, term.c.y+1);
-                               term.esc = 0;
-                               break;
-                       case 'E': /* NEL -- Next line */
-                               tnewline();
-                               term.esc = 0;
-                               break;
-                       case 'M': /* RI -- Reverse index */
-                               if(term.c.y == term.top)
-                                       tscrolldown(term.top, 1);
-                               else
-                                       tmoveto(term.c.x, term.c.y-1);
-                               term.esc = 0;
-                               break;
-                       case 'c': /* RIS -- Reset to inital state */
-                               treset();
-                               term.esc = 0;
-                               break;
-                       case '=': /* DECPAM -- Application keypad */
-                               term.mode |= MODE_APPKEYPAD;
-                               term.esc = 0;
-                               break;
-                       case '>': /* DECPNM -- Normal keypad */
-                               term.mode &= ~MODE_APPKEYPAD;
-                               term.esc = 0;
-                               break;
-                       case '7': /* DECSC -- Save Cursor */
-                               tcursor(CURSOR_SAVE);
-                               term.esc = 0;
-                               break;
-                       case '8': /* DECRC -- Restore Cursor */
-                               tcursor(CURSOR_LOAD);
-                               term.esc = 0;
-                               break;
-                       default:
-                               fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.');
-                               term.esc = 0;
+                       if (sel.ob.y < term.top) {
+                               sel.ob.y = term.top;
+                               sel.ob.x = 0;
+                       }
+                       if (sel.oe.y > term.bot) {
+                               sel.oe.y = term.bot;
+                               sel.oe.x = term.col;

                        }
                }
                        }
                }

+               selnormalize();
+       }
+}
+
+void
+tnewline(int first_col)
+{
+       int y = term.c.y;
+
+       if (y == term.bot) {
+               tscrollup(term.top, 1);

        } else {
        } else {

-               switch(c) {
-               case '\t':
-                       tputtab();
-                       break;
-               case '\b':
-                       tmoveto(term.c.x-1, term.c.y);
-                       break;
-               case '\r':
-                       tmoveto(0, term.c.y);
-                       break;
-               case '\n':
-                       tnewline();
-                       break;
-               case '\a':
-                       if(!(xw.state & WIN_FOCUSED))
-                               xseturgency(1);
-                       break;
-               case '\033':
-                       csireset();
-                       term.esc = ESC_START;
-                       break;
-               default:
-                       if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
-                               tnewline();
-                       tsetchar(c);
-                       if(term.c.x+1 < term.col)
-                               tmoveto(term.c.x+1, term.c.y);
-                       else
-                               term.c.state |= CURSOR_WRAPNEXT;
+               y++;
+       }
+       tmoveto(first_col ? 0 : term.c.x, y);
+}
+
+void
+csiparse(void)
+{
+       char *p = csiescseq.buf, *np;
+       long int v;
+
+       csiescseq.narg = 0;
+       if (*p == '?') {
+               csiescseq.priv = 1;
+               p++;
+       }
+
+       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;
                        break;

-               }
+               p++;

        }
        }

+       csiescseq.mode[0] = *p++;
+       csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';

 }
 
 }
 

+/* for absolute user moves, when decom is set */

 void
 void

-tputs(char *s, int len) {
-       for(; len > 0; len--)
-               tputc(*s++);
+tmoveato(int x, int y)
+{
+       tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));

 }
 
 void
 }
 
 void

-tresize(int col, int row) {
-       int i, x;
-       int minrow = MIN(row, term.row);
-       int mincol = MIN(col, term.col);
-       int slide = term.c.y - row + 1;
+tmoveto(int x, int y)
+{
+       int miny, maxy;

 
 

-       if(col < 1 || row < 1)
-               return;
+       if (term.c.state & CURSOR_ORIGIN) {
+               miny = term.top;
+               maxy = term.bot;
+       } else {
+               miny = 0;
+               maxy = term.row - 1;
+       }
+       term.c.state &= ~CURSOR_WRAPNEXT;
+       term.c.x = LIMIT(x, 0, term.col-1);
+       term.c.y = LIMIT(y, miny, maxy);
+}
+
+void
+tsetchar(Rune u, 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 - ~ */
+       };

 
 

-       /* 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]);
+       /*
+        * The table is proudly stolen from rxvt.
+        */
+       if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
+          BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
+               utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
+
+       if (term.line[y][x].mode & ATTR_WIDE) {
+               if (x+1 < term.col) {
+                       term.line[y][x+1].u = ' ';
+                       term.line[y][x+1].mode &= ~ATTR_WDUMMY;

                }
                }

-               memmove(term.line, term.line + slide, row * sizeof(Line));
-               memmove(term.alt, term.alt + slide, row * sizeof(Line));
+       } else if (term.line[y][x].mode & ATTR_WDUMMY) {
+               term.line[y][x-1].u = ' ';
+               term.line[y][x-1].mode &= ~ATTR_WIDE;

        }
        }

-       for(i += row; i < term.row; i++) {
-               free(term.line[i]);
-               free(term.alt[i]);
+
+       term.dirty[y] = 1;
+       term.line[y][x] = *attr;
+       term.line[y][x].u = u;
+}
+
+void
+tclearregion(int x1, int y1, int x2, int y2)
+{
+       int x, y, temp;
+       Glyph *gp;
+
+       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++) {
+                       gp = &term.line[y][x];
+                       if (selected(x, y))
+                               selclear(NULL);
+                       gp->fg = term.c.attr.fg;
+                       gp->bg = term.c.attr.bg;
+                       gp->mode = 0;
+                       gp->u = ' ';
+               }
+       }
+}
+
+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 (%u,%u,%u)\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_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 */
+                       /* FALLTHROUGH */
+               case 6: /* rapid blink */
+                       term.c.attr.mode |= ATTR_BLINK;
+                       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 22:
+                       term.c.attr.mode &= ~(ATTR_BOLD | 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 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(int priv, int set, int *args, int narg)
+{
+       int *lim, mode;
+       int 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();
+                               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[0]) {
+       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(vtiden, sizeof(vtiden) - 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;
+       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;
+       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;
+       case ' ':
+               switch (csiescseq.mode[1]) {
+                       case 'q': /* DECSCUSR -- Set Cursor Style */
+                               DEFAULT(csiescseq.arg[0], 1);
+                               if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
+                                       goto unknown;
+                               }
+                               xw.cursor = csiescseq.arg[0];
+                               break;
+                       default:
+                               goto unknown;
+               }
+               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();
+       par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 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();
+                       }
+                       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)
+{
+       int c;
+       char *p = strescseq.buf;
+
+       strescseq.narg = 0;
+       strescseq.buf[strescseq.len] = '\0';
+
+       if (*p == '\0')
+               return;
+
+       while (strescseq.narg < STR_ARG_SIZ) {
+               strescseq.args[strescseq.narg++] = p;
+               while ((c = *p) != ';' && c != '\0')
+                       ++p;
+               if (c == '\0')
+                       return;
+               *p++ = '\0';
+       }
+}
+
+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)
+{
+       char buf[UTF_SIZ];
+       Glyph *bp, *end;
+
+       bp = &term.line[n][0];
+       end = &bp[MIN(tlinelen(n), term.col) - 1];
+       if (bp != end || bp->u != ' ') {
+               for ( ;bp <= end; ++bp)
+                       tprinter(buf, utf8encode(bp->u, buf));
+       }
+       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 */ ;
+       }
+       term.c.x = LIMIT(x, 0, term.col-1);
+}
+
+void
+techo(Rune u)
+{
+       if (ISCONTROL(u)) { /* control code */
+               if (u & 0x80) {
+                       u &= 0x7f;
+                       tputc('^');
+                       tputc('[');
+               } else if (u != '\n' && u != '\r' && u != '\t') {
+                       u ^= 0x40;
+                       tputc('^');
+               }
+       }
+       tputc(u);
+}
+
+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
+tdectest(char c)
+{
+       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
+tstrsequence(uchar c)
+{
+       switch (c) {
+       case 0x90:   /* DCS -- Device Control String */
+               c = 'P';
+               break;
+       case 0x9f:   /* APC -- Application Program Command */
+               c = '_';
+               break;
+       case 0x9e:   /* PM -- Privacy Message */
+               c = '^';
+               break;
+       case 0x9d:   /* OSC -- Operating System Command */
+               c = ']';
+               break;
+       }
+       strreset();
+       strescseq.type = c;
+       term.esc |= ESC_STR;
+}
+
+void
+tcontrolcode(uchar ascii)
+{
+       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)
+                               XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
+               }
+               break;
+       case '\033': /* ESC */
+               csireset();
+               term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
+               term.esc |= ESC_START;
+               return;
+       case '\016': /* SO (LS1 -- Locking shift 1) */
+       case '\017': /* SI (LS0 -- Locking shift 0) */
+               term.charset = 1 - (ascii - '\016');
+               return;
+       case '\032': /* SUB */
+               tsetchar('?', &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 */
+               break;
+       case 0x85:   /* NEL -- Next line */
+               tnewline(1); /* always go to first col */
+               break;
+       case 0x88:   /* HTS -- Horizontal tab stop */
+               term.tabs[term.c.x] = 1;
+               break;
+       case 0x8d:   /* TODO: RI */
+       case 0x8e:   /* TODO: SS2 */
+       case 0x8f:   /* TODO: SS3 */
+       case 0x98:   /* TODO: SOS */
+               break;
+       case 0x9a:   /* DECID -- Identify Terminal */
+               ttywrite(vtiden, sizeof(vtiden) - 1);
+               break;
+       case 0x9b:   /* TODO: CSI */
+       case 0x9c:   /* TODO: ST */
+               break;
+       case 0x90:   /* DCS -- Device Control String */
+       case 0x9f:   /* APC -- Application Program Command */
+       case 0x9e:   /* PM -- Privacy Message */
+       case 0x9d:   /* OSC -- Operating System Command */
+               tstrsequence(ascii);
+               return;
+       }
+       /* only CAN, SUB, \a and C1 chars interrupt a sequence */
+       term.esc &= ~(ESC_STR_END|ESC_STR);
+}
+
+/*
+ * returns 1 when the sequence is finished and it hasn't to read
+ * more characters for this sequence, otherwise 0
+ */
+int
+eschandle(uchar ascii)
+{
+       switch (ascii) {
+       case '[':
+               term.esc |= ESC_CSI;
+               return 0;
+       case '#':
+               term.esc |= ESC_TEST;
+               return 0;
+       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 */
+               tstrsequence(ascii);
+               return 0;
+       case 'n': /* LS2 -- Locking shift 2 */
+       case 'o': /* LS3 -- Locking shift 3 */
+               term.charset = 2 + (ascii - 'n');
+               break;
+       case '(': /* GZD4 -- set primary charset G0 */
+       case ')': /* G1D4 -- set secondary charset G1 */
+       case '*': /* G2D4 -- set tertiary charset G2 */
+       case '+': /* G3D4 -- set quaternary charset G3 */
+               term.icharset = ascii - '(';
+               term.esc |= ESC_ALTCHARSET;
+               return 0;
+       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(vtiden, sizeof(vtiden) - 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;
+       }
+       return 1;
+}
+
+void
+tputc(Rune u)
+{
+       char c[UTF_SIZ];
+       int control;
+       int width, len;
+       Glyph *gp;
+
+       len = utf8encode(u, c);
+       if ((width = wcwidth(u)) == -1) {
+               memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
+               width = 1;
+       }
+
+       if (IS_SET(MODE_PRINT))
+               tprinter(c, len);
+       control = ISCONTROL(u);
+
+       /*
+        * 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 (u == '\a' || u == 030 || u == 032 || u == 033 ||
+                  ISCONTROLC1(u)) {
+                       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(u);
+               /*
+                * control codes are not shown ever
+                */
+               return;
+       } else if (term.esc & ESC_START) {
+               if (term.esc & ESC_CSI) {
+                       csiescseq.buf[csiescseq.len++] = u;
+                       if (BETWEEN(u, 0x40, 0x7E)
+                                       || csiescseq.len >= \
+                                       sizeof(csiescseq.buf)-1) {
+                               term.esc = 0;
+                               csiparse();
+                               csihandle();
+                       }
+                       return;
+               } else if (term.esc & ESC_ALTCHARSET) {
+                       tdeftran(u);
+               } else if (term.esc & ESC_TEST) {
+                       tdectest(u);
+               } else {
+                       if (!eschandle(u))
+                               return;
+                       /* sequence already finished */
+               }
+               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);
+               gp = &term.line[term.c.y][term.c.x];
+       }
+
+       if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)
+               memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
+
+       if (term.c.x+width > term.col) {
+               tnewline(1);
+               gp = &term.line[term.c.y][term.c.x];
+       }
+
+       tsetchar(u, &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].u = '\0';
+                       gp[1].mode = ATTR_WDUMMY;
+               }
+       }
+       if (term.c.x+width < term.col) {
+               tmoveto(term.c.x+width, term.c.y);
+       } else {
+               term.c.state |= CURSOR_WRAPNEXT;
+       }
+}
+
+void
+tresize(int col, int row)
+{
+       int i;
+       int minrow = MIN(row, term.row);
+       int mincol = MIN(col, term.col);
+       int *bp;
+       TCursor c;
+
+       if (col < 1 || row < 1) {
+               fprintf(stderr,
+                       "tresize: error resizing to %dx%d\n", col, row);
+               return;
+       }
+
+       /*
+        * 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 <= term.c.y - row; i++) {
+               free(term.line[i]);
+               free(term.alt[i]);
+       }
+       /* ensure that both src and dst are not NULL */
+       if (i > 0) {
+               memmove(term.line, term.line + i, row * sizeof(Line));
+               memmove(term.alt, term.alt + i, row * sizeof(Line));
+       }
+       for (i += row; i < term.row; i++) {
+               free(term.line[i]);
+               free(term.alt[i]);
+       }
+
+       /* resize to new width */
+       term.specbuf = xrealloc(term.specbuf, col * sizeof(XftGlyphFontSpec));
+
+       /* 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.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.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 (it makes dirty all lines) */
+       c = term.c;
+       for (i = 0; i < 2; i++) {
+               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);
+       }
+       term.c = c;
+}
+
+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);
+}
+
+ushort
+sixd_to_16bit(int x)
+{
+       return x == 0 ? 0 : 0x3737 + 0x2828 * x;
+}
+
+int
+xloadcolor(int i, const char *name, Color *ncolor)
+{
+       XRenderColor color = { .alpha = 0xffff };
+
+       if (!name) {
+               if (BETWEEN(i, 16, 255)) { /* 256 color */
+                       if (i < 6*6*6+16) { /* same colors as xterm */
+                               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 );
+                       } else { /* greyscale */
+                               color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
+                               color.green = color.blue = color.red;
+                       }
+                       return XftColorAllocValue(xw.dpy, xw.vis,
+                                                 xw.cmap, &color, ncolor);
+               } else
+                       name = colorname[i];
+       }
+
+       return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
+}
+
+void
+xloadcols(void)
+{
+       int i;
+       static int loaded;
+       Color *cp;
+
+       if (loaded) {
+               for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
+                       XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
+       }
+
+       for (i = 0; i < LEN(dc.col); i++)
+               if (!xloadcolor(i, NULL, &dc.col[i])) {
+                       if (colorname[i])
+                               die("Could not allocate color '%s'\n", colorname[i]);
+                       else
+                               die("Could not allocate color %d\n", i);
+               }
+       loaded = 1;
+}
+
+int
+xsetcolorname(int x, const char *name)
+{
+       Color ncolor;
+
+       if (!BETWEEN(x, 0, LEN(dc.col)))
+               return 1;
+
+
+       if (!xloadcolor(x, 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) {
+               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;
+       double fontval;
+       float ceilf(float);
+
+       if (fontstr[0] == '-') {
+               pattern = XftXlfdParse(fontstr, False, False);
+       } else {
+               pattern = FcNameParse((FcChar8 *)fontstr);

        }
 
        }
 

-       /* resize to new height */
-       term.line = realloc(term.line, row * sizeof(Line));
-       term.alt  = realloc(term.alt,  row * sizeof(Line));
+       if (!pattern)
+               die("st: can't open font %s\n", fontstr);

 
 

-       /* resize each row to new width, zero-pad if needed */
-       for(i = 0; i < minrow; i++) {
-               term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
-               term.alt[i]  = realloc(term.alt[i],  col * sizeof(Glyph));
-               for(x = mincol; x < col; x++) {
-                       term.line[i][x].state = 0;
-                       term.alt[i][x].state = 0;
+       if (fontsize > 1) {
+               FcPatternDel(pattern, FC_PIXEL_SIZE);
+               FcPatternDel(pattern, FC_SIZE);
+               FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
+               usedfontsize = fontsize;
+       } else {
+               if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
+                               FcResultMatch) {
+                       usedfontsize = fontval;
+               } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
+                               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;

                }
                }

+               defaultfontsize = usedfontsize;

        }
 
        }
 

-       /* allocate any new rows */
-       for(/* i == minrow */; i < row; i++) {
-               term.line[i] = calloc(col, sizeof(Glyph));
-               term.alt [i] = calloc(col, sizeof(Glyph));
+       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;
+               if (fontsize == 0)
+                       defaultfontsize = fontval;

        }
        }

-       
-       /* update terminal size */
-       term.col = col, term.row = row;
-       /* make use of the LIMIT in tmoveto */
-       tmoveto(term.c.x, term.c.y);
-       /* reset scrolling region */
-       tsetscroll(0, row-1);
+
+       /* 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);

 }
 
 void
 }
 
 void

-xloadcols(void) {
-       int i, r, g, b;
-       XColor color;
-       unsigned long white = WhitePixel(xw.dis, xw.scr);
+xunloadfont(Font *f)
+{
+       XftFontClose(xw.dpy, f->match);
+       FcPatternDestroy(f->pattern);
+       if (f->set)
+               FcFontSetDestroy(f->set);
+}

 
 

-       for(i = 0; i < 16; i++) {
-               if (!XAllocNamedColor(xw.dis, xw.cmap, colorname[i], &color, &color)) {
-                       dc.col[i] = white;
-                       fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
-               } else
-                       dc.col[i] = color.pixel;
-       }
-
-       /* same colors as xterm */
-       for(r = 0; r < 6; r++)
-               for(g = 0; g < 6; g++)
-                       for(b = 0; b < 6; b++) {
-                               color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
-                               color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
-                               color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
-                               if (!XAllocColor(xw.dis, xw.cmap, &color)) {
-                                       dc.col[i] = white;
-                                       fprintf(stderr, "Could not allocate color %d\n", i);
-                               } else
-                                       dc.col[i] = color.pixel;
-                               i++;
-                       }
+void
+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);
+}

 
 

-       for(r = 0; r < 24; r++, i++) {
-               color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
-               if (!XAllocColor(xw.dis, xw.cmap, &color)) {
-                       dc.col[i] = white;
-                       fprintf(stderr, "Could not allocate color %d\n", i);
-               } else
-                       dc.col[i] = color.pixel;
-       }
+void
+xzoom(const Arg *arg)
+{
+       Arg larg;
+
+       larg.f = usedfontsize + arg->f;
+       xzoomabs(&larg);

 }
 
 void
 }
 
 void

-xclear(int x1, int y1, int x2, int y2) {
-       XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
-       XFillRectangle(xw.dis, xw.buf, dc.gc,
-                      x1 * xw.cw, y1 * xw.ch,
-                      (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
+xzoomabs(const Arg *arg)
+{
+       xunloadfonts();
+       xloadfonts(usedfont, arg->f);
+       cresize(0, 0);
+       redraw();
+       xhints();

 }
 
 void
 }
 
 void

-xhints(void)
+xzoomreset(const Arg *arg)

 {
 {

-       XClassHint class = {TNAME, TNAME};
-       XWMHints wm = {.flags = InputHint, .input = 1};
-       XSizeHints size = {
-               .flags = PSize | PResizeInc | PBaseSize,
-               .height = xw.h,
-               .width = xw.w,
-               .height_inc = xw.ch,
-               .width_inc = xw.cw,
-               .base_height = 2*BORDER,
-               .base_width = 2*BORDER,
-       };
-       XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
+       Arg larg;
+
+       if (defaultfontsize > 0) {
+               larg.f = defaultfontsize;
+               xzoomabs(&larg);
+       }

 }
 
 void
 }
 
 void

-xinit(void) {
-       XSetWindowAttributes attrs;
+xinit(void)
+{
+       XGCValues gcvalues;
+       Cursor cursor;
+       Window parent;
+       pid_t thispid = getpid();

 
 

-       if(!(xw.dis = XOpenDisplay(NULL)))
+       if (!(xw.dpy = XOpenDisplay(NULL)))

                die("Can't open display\n");
                die("Can't open display\n");

-       xw.scr = XDefaultScreen(xw.dis);
-       
+       xw.scr = XDefaultScreen(xw.dpy);
+       xw.vis = XDefaultVisual(xw.dpy, xw.scr);
+

        /* font */
        /* font */

-       if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT)))
-               die("Can't load font %s\n", dc.font ? BOLDFONT : FONT);
+       if (!FcInit())
+               die("Could not init fontconfig.\n");

 
 

-       /* XXX: Assuming same size for bold font */
-       xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
-       xw.ch = dc.font->ascent + dc.font->descent;
+       usedfont = (opt_font == NULL)? font : opt_font;
+       xloadfonts(usedfont, 0);

 
        /* colors */
 
        /* colors */

-       xw.cmap = XDefaultColormap(xw.dis, xw.scr);
+       xw.cmap = XDefaultColormap(xw.dpy, xw.scr);

        xloadcols();
 
        xloadcols();
 

-       /* window - default size */
-       xw.bufh = 24 * xw.ch;
-       xw.bufw = 80 * xw.cw;
-       xw.h = xw.bufh + 2*BORDER;
-       xw.w = xw.bufw + 2*BORDER;
-
-       attrs.background_pixel = dc.col[DefaultBG];
-       attrs.border_pixel = dc.col[DefaultBG];
-       attrs.bit_gravity = NorthWestGravity;
-       attrs.event_mask = FocusChangeMask | KeyPressMask
+       /* 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
                | ExposureMask | VisibilityChangeMask | StructureNotifyMask

-               | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
-       attrs.colormap = xw.cmap;
-
-       xw.win = XCreateWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
-                       xw.w, xw.h, 0, XDefaultDepth(xw.dis, xw.scr), InputOutput,
-                       XDefaultVisual(xw.dis, xw.scr),
-                       CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
-                       | CWColormap,
-                       &attrs);
-       xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
-
+               | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
+       xw.attrs.colormap = xw.cmap;
+
+       if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
+               parent = 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 */
 
        /* input methods */

-       xw.xim = XOpenIM(xw.dis, NULL, NULL, NULL);
-       xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing 
-                                          | XIMStatusNothing, XNClientWindow, xw.win, 
+       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");
+                       }
+               }
+       }
+       xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
+                                          | XIMStatusNothing, XNClientWindow, xw.win,

                                           XNFocusWindow, xw.win, NULL);
                                           XNFocusWindow, xw.win, NULL);

-       /* gc */
-       dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL);
-       
-       XMapWindow(xw.dis, xw.win);
+       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();
        xhints();

-       XStoreName(xw.dis, xw.win, opt_title ? opt_title : "st");
-       XSync(xw.dis, 0);
+       XSync(xw.dpy, False);
+}
+
+int
+xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
+{
+       float winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch, xp, yp;
+       ushort mode, prevmode = USHRT_MAX;
+       Font *font = &dc.font;
+       int frcflags = FRC_NORMAL;
+       float runewidth = xw.cw;
+       Rune rune;
+       FT_UInt glyphidx;
+       FcResult fcres;
+       FcPattern *fcpattern, *fontpattern;
+       FcFontSet *fcsets[] = { NULL };
+       FcCharSet *fccharset;
+       int i, f, numspecs = 0;
+
+       for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
+               /* Fetch rune and mode for current glyph. */
+               rune = glyphs[i].u;
+               mode = glyphs[i].mode;
+
+               /* Skip dummy wide-character spacing. */
+               if (mode == ATTR_WDUMMY)
+                       continue;
+
+               /* Determine font for glyph if different from previous glyph. */
+               if (prevmode != mode) {
+                       prevmode = mode;
+                       font = &dc.font;
+                       frcflags = FRC_NORMAL;
+                       runewidth = xw.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
+                       if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
+                               font = &dc.ibfont;
+                               frcflags = FRC_ITALICBOLD;
+                       } else if (mode & ATTR_ITALIC) {
+                               font = &dc.ifont;
+                               frcflags = FRC_ITALIC;
+                       } else if (mode & ATTR_BOLD) {
+                               font = &dc.bfont;
+                               frcflags = FRC_BOLD;
+                       }
+                       yp = winy + font->ascent;
+               }
+
+               /* Lookup character index with default font. */
+               glyphidx = XftCharIndex(xw.dpy, font->match, rune);
+               if (glyphidx) {
+                       specs[numspecs].font = font->match;
+                       specs[numspecs].glyph = glyphidx;
+                       specs[numspecs].x = (short)xp;
+                       specs[numspecs].y = (short)yp;
+                       xp += runewidth;
+                       numspecs++;
+                       continue;
+               }
+
+               /* Fallback on font cache, search the font cache for match. */
+               for (f = 0; f < frclen; f++) {
+                       glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
+                       /* Everything correct. */
+                       if (glyphidx && frc[f].flags == frcflags)
+                               break;
+                       /* We got a default font for a not found glyph. */
+                       if (!glyphidx && frc[f].flags == frcflags
+                                       && frc[f].unicodep == rune) {
+                               break;
+                       }
+               }
+
+               /* Nothing was found. Use fontconfig to find matching font. */
+               if (f >= frclen) {
+                       if (!font->set)
+                               font->set = FcFontSort(0, font->pattern,
+                                                      1, 0, &fcres);
+                       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, rune);
+                       FcPatternAddCharSet(fcpattern, FC_CHARSET,
+                                       fccharset);
+                       FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
+
+                       FcConfigSubstitute(0, fcpattern,
+                                       FcMatchPattern);
+                       FcDefaultSubstitute(fcpattern);
+
+                       fontpattern = FcFontSetMatch(0, fcsets, 1,
+                                       fcpattern, &fcres);
+
+                       /*
+                        * Overwrite or create the new cache entry.
+                        */
+                       if (frclen >= LEN(frc)) {
+                               frclen = LEN(frc) - 1;
+                               XftFontClose(xw.dpy, frc[frclen].font);
+                               frc[frclen].unicodep = 0;
+                       }
+
+                       frc[frclen].font = XftFontOpenPattern(xw.dpy,
+                                       fontpattern);
+                       frc[frclen].flags = frcflags;
+                       frc[frclen].unicodep = rune;
+
+                       glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
+
+                       f = frclen;
+                       frclen++;
+
+                       FcPatternDestroy(fcpattern);
+                       FcCharSetDestroy(fccharset);
+               }
+
+               specs[numspecs].font = frc[f].font;
+               specs[numspecs].glyph = glyphidx;
+               specs[numspecs].x = (short)xp;
+               specs[numspecs].y = (short)(winy + frc[f].font->ascent);
+               xp += runewidth;
+               numspecs++;
+       }
+
+       return numspecs;

 }
 
 void
 }
 
 void

-xdraws(char *s, Glyph base, int x, int y, int len) {
-       unsigned long xfg, xbg;
-       int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
-       int i;
+xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
+{
+       int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
+       int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
+           width = charlen * xw.cw;
+       Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
+       XRenderColor colfg, colbg;
+       XRectangle r;
+
+       /* Determine foreground and background colors based on mode. */
+       if (base.fg == defaultfg) {
+               if (base.mode & ATTR_ITALIC)
+                       base.fg = defaultitalic;
+               else if ((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD))
+                       base.fg = defaultitalic;
+               else if (base.mode & ATTR_UNDERLINE)
+                       base.fg = defaultunderline;
+       }

 
 

-       if(base.mode & ATTR_REVERSE)
-               xfg = dc.col[base.bg], xbg = dc.col[base.fg];
-       else
-               xfg = dc.col[base.fg], xbg = dc.col[base.bg];
+       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];
+       }
+
+       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];
+       }

 
 

-       XSetBackground(xw.dis, dc.gc, xbg);
-       XSetForeground(xw.dis, dc.gc, xfg);
-       
-       if(base.mode & ATTR_GFX)
-               for(i = 0; i < len; i++) {
-                       char c = gfx[(unsigned int)s[i] % 256];
-                       if(c)
-                               s[i] = c;
-                       else if(s[i] > 0x5f)
-                               s[i] -= 0x5f;
+       /* Change basic system colors [0-7] to bright system colors [8-15] */
+       if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
+               fg = &dc.col[base.fg + 8];
+
+       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;
+               }
+
+               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;

                }
                }

+       }
+
+       if (base.mode & ATTR_REVERSE) {
+               temp = fg;
+               fg = bg;
+               bg = temp;
+       }
+
+       if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
+               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;
+       }
+
+       if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
+               fg = bg;
+
+       if (base.mode & ATTR_INVISIBLE)
+               fg = bg;
+
+       /* 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));
+       }
+       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);
+
+       /* Render the glyphs. */
+       XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
+
+       /* Render underline and strikethrough. */
+       if (base.mode & ATTR_UNDERLINE) {
+               XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
+                               width, 1);
+       }

 
 

-       XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
-       XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len);
-       
-       if(base.mode & ATTR_UNDERLINE)
-               XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
+       if (base.mode & ATTR_STRUCK) {
+               XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
+                               width, 1);
+       }
+
+       /* Reset clip to none. */
+       XftDrawSetClip(xw.draw, 0);
+}
+
+void
+xdrawglyph(Glyph g, int x, int y)
+{
+       int numspecs;
+       XftGlyphFontSpec spec;
+       numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
+       xdrawglyphfontspecs(&spec, g, numspecs, x, y);

 }
 
 void
 }
 
 void

-xdrawcursor(void) {
-       static int oldx = 0;
-       static int oldy = 0;
-       Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
-       
+xdrawcursor(void)
+{
+       static int oldx = 0, oldy = 0;
+       int curx;
+       Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
+

        LIMIT(oldx, 0, term.col-1);
        LIMIT(oldy, 0, term.row-1);
        LIMIT(oldx, 0, term.col-1);
        LIMIT(oldy, 0, term.row-1);

-       
-       if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
-               g.c = term.line[term.c.y][term.c.x].c;
-       
+
+       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--;
+
+       g.u = term.line[term.c.y][term.c.x].u;
+

        /* remove the old cursor */
        /* remove the old cursor */

-       if(term.line[oldy][oldx].state & GLYPH_SET)
-               xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1);
-       else
-               xclear(oldx, oldy, oldx, oldy);
-       
+       xdrawglyph(term.line[oldy][oldx], oldx, oldy);
+
+       if (IS_SET(MODE_HIDE))
+               return;
+

        /* draw the new one */
        /* draw the new one */

-       if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
-               xdraws(&g.c, g, term.c.x, term.c.y, 1);
-               oldx = term.c.x, oldy = term.c.y;
+       if (xw.state & WIN_FOCUSED) {
+               switch (xw.cursor) {
+                       case 0: /* Blinking Block */
+                       case 1: /* Blinking Block (Default) */
+                       case 2: /* Steady Block */
+                               if (IS_SET(MODE_REVERSE)) {
+                                               g.mode |= ATTR_REVERSE;
+                                               g.fg = defaultcs;
+                                               g.bg = defaultfg;
+                                       }
+
+                               g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
+                               xdrawglyph(g, term.c.x, term.c.y);
+                               break;
+                       case 3: /* Blinking Underline */
+                       case 4: /* Steady Underline */
+                               XftDrawRect(xw.draw, &dc.col[defaultcs],
+                                               borderpx + curx * xw.cw,
+                                               borderpx + (term.c.y + 1) * xw.ch - cursorthickness,
+                                               xw.cw, cursorthickness);
+                               break;
+                       case 5: /* Blinking bar */
+                       case 6: /* Steady bar */
+                               XftDrawRect(xw.draw, &dc.col[defaultcs],
+                                               borderpx + curx * xw.cw,
+                                               borderpx + term.c.y * xw.ch,
+                                               cursorthickness, xw.ch);
+                               break;
+               }
+       } 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;

 }
 
 }
 

-#ifdef DEBUG
-/* basic drawing routines */
+

 void
 void

-xdrawc(int x, int y, Glyph g) {
-       XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
-       XSetBackground(xw.dis, dc.gc, dc.col[g.bg]);
-       XSetForeground(xw.dis, dc.gc, dc.col[g.fg]);
-       XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid);
-       XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
+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

-draw(int dummy) {
-       int x, y;
+xresettitle(void)
+{
+       xsettitle(opt_title ? opt_title : "st");
+}

 
 

-       xclear(0, 0, term.col-1, term.row-1);
-       for(y = 0; y < term.row; y++)
-               for(x = 0; x < term.col; x++)
-                       if(term.line[y][x].state & GLYPH_SET)
-                               xdrawc(x, y, term.line[y][x]);
+void
+redraw(void)
+{
+       tfulldirt();
+       draw();
+}

 
 

-       xdrawcursor();
-       XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
-       XFlush(xw.dis);
+void
+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);

 }
 
 }
 

-#else
-/* optimized drawing routine */

 void
 void

-draw(int redraw_all) {
-       int i, x, y, ox;
+drawregion(int x1, int y1, int x2, int y2)
+{
+       int i, x, y, ox, numspecs;

        Glyph base, new;
        Glyph base, new;

-       char buf[DRAW_BUF_SIZ];
+       XftGlyphFontSpec* specs;
+       int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);

 
 

-       if(!(xw.state & WIN_VISIBLE))
+       if (!(xw.state & WIN_VISIBLE))

                return;
 
                return;
 

-       xclear(0, 0, term.col-1, term.row-1);
-       for(y = 0; y < term.row; y++) {
-               base = term.line[y][0];
+       for (y = y1; y < y2; y++) {
+               if (!term.dirty[y])
+                       continue;
+
+               xtermclear(0, y, term.col, y);
+               term.dirty[y] = 0;
+
+               specs = term.specbuf;
+               numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
+

                i = ox = 0;
                i = ox = 0;

-               for(x = 0; x < term.col; x++) {
+               for (x = x1; x < x2 && i < numspecs; x++) {

                        new = term.line[y][x];
                        new = term.line[y][x];

-                       if(sel.bx!=-1 && new.c && selected(x, y))
+                       if (new.mode == ATTR_WDUMMY)
+                               continue;
+                       if (ena_sel && selected(x, y))

                                new.mode ^= ATTR_REVERSE;
                                new.mode ^= ATTR_REVERSE;

-                       if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
-                                       i >= DRAW_BUF_SIZ)) {
-                               xdraws(buf, base, ox, y, i);
+                       if (i > 0 && ATTRCMP(base, new)) {
+                               xdrawglyphfontspecs(specs, base, i, ox, y);
+                               specs += i;
+                               numspecs -= i;

                                i = 0;
                        }
                                i = 0;
                        }

-                       if(new.state & GLYPH_SET) {
-                               if(i == 0) {
-                                       ox = x;
-                                       base = new;
-                               }
-                               buf[i++] = new.c;
+                       if (i == 0) {
+                               ox = x;
+                               base = new;

                        }
                        }

+                       i++;

                }
                }

-               if(i > 0)
-                       xdraws(buf, base, ox, y, i);
+               if (i > 0)
+                       xdrawglyphfontspecs(specs, base, i, ox, y);

        }
        xdrawcursor();
        }
        xdrawcursor();

-       XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);

 }
 
 }
 

-#endif
-

 void
 void

-expose(XEvent *ev) {
-       XExposeEvent *e = &ev->xexpose;
-       if(xw.state & WIN_REDRAW) {
-               if(!e->count) {
-                       xw.state &= ~WIN_REDRAW;
-                       draw(SCREEN_REDRAW);
-               }
-       } else
-               XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
-                               e->width, e->height, e->x, e->y);
+expose(XEvent *ev)
+{
+       redraw();

 }
 
 void
 }
 
 void

-visibility(XEvent *ev) {
+visibility(XEvent *ev)
+{

        XVisibilityEvent *e = &ev->xvisibility;
        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;
+
+       MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);

 }
 
 void
 }
 
 void

-unmap(XEvent *ev) {
+unmap(XEvent *ev)
+{

        xw.state &= ~WIN_VISIBLE;
 }
 
 void
        xw.state &= ~WIN_VISIBLE;
 }
 
 void

-xseturgency(int add) {
-       XWMHints *h = XGetWMHints(xw.dis, xw.win);
-       h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
-       XSetWMHints(xw.dis, xw.win, h);
+xsetpointermotion(int set)
+{
+       MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
+       XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
+}
+
+void
+xseturgency(int add)
+{
+       XWMHints *h = XGetWMHints(xw.dpy, xw.win);
+
+       MODBIT(h->flags, add, XUrgencyHint);
+       XSetWMHints(xw.dpy, xw.win, h);

        XFree(h);
 }
 
 void
        XFree(h);
 }
 
 void

-focus(XEvent *ev) {
-       if(ev->type == FocusIn) {
+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);
                xw.state |= WIN_FOCUSED;
                xseturgency(0);

-       } else
+               if (IS_SET(MODE_FOCUS))
+                       ttywrite("\033[I", 3);
+       } else {
+               XUnsetICFocus(xw.xic);

                xw.state &= ~WIN_FOCUSED;
                xw.state &= ~WIN_FOCUSED;

-       draw(SCREEN_UPDATE);
+               if (IS_SET(MODE_FOCUS))
+                       ttywrite("\033[O", 3);
+       }
+}
+
+int
+match(uint mask, uint state)
+{
+       return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
+}
+
+void
+numlock(const Arg *dummy)
+{
+       term.numlock ^= 1;

 }
 
 char*
 }
 
 char*

-kmap(KeySym k) {
+kmap(KeySym k, uint state)
+{
+       Key *kp;

        int i;
        int i;

-       for(i = 0; i < LEN(key); i++)
-               if(key[i].k == k)
-                       return (char*)key[i].s;
+
+       /* 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;
+       }
+
+       for (kp = key; kp < key + LEN(key); kp++) {
+               if (kp->k != k)
+                       continue;
+
+               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;
+
+               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;
+       }
+

        return NULL;
 }
 
 void
        return NULL;
 }
 
 void

-kpress(XEvent *ev) {
+kpress(XEvent *ev)
+{

        XKeyEvent *e = &ev->xkey;
        KeySym ksym;
        XKeyEvent *e = &ev->xkey;
        KeySym ksym;

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

        int len;
        int len;

-       int meta;
-       int shift;
+       Rune c;

        Status status;
        Status status;

+       Shortcut *bp;

 
 

-       meta = e->state & Mod1Mask;
-       shift = e->state & ShiftMask;
-       len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
-
-       if((customkey = kmap(ksym)))
-               ttywrite(customkey, strlen(customkey));
-       else if(len > 0) {
-               buf[sizeof(buf)-1] = '\0';
-               if(meta && len == 1)
-                       ttywrite("\033", 1);
-               ttywrite(buf, len);
-       } else
-               switch(ksym) {
-               case XK_Up:
-               case XK_Down:
-               case XK_Left:
-               case XK_Right:
-                       sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]);
-                       ttywrite(buf, 3);
-                       break;
-               case XK_Insert:
-                       if(shift)
-                               selpaste();
-                       break;
-               default:
-                       fprintf(stderr, "errkey: %d\n", (int)ksym);
-                       break;
+       if (IS_SET(MODE_KBDLOCK))
+               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;
+               }
+       }
+
+       /* 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);
+                       }
+               } else {
+                       buf[1] = buf[0];
+                       buf[0] = '\033';
+                       len = 2;

                }
                }

+       }
+       ttysend(buf, len);
+}
+
+
+void
+cmessage(XEvent *e)
+{
+       /*
+        * See xembed specs
+        *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
+        */
+       if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
+               if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
+                       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(0);
+       }

 }
 
 void
 }
 
 void

-resize(XEvent *e) {
+cresize(int width, int height)
+{

        int col, row;
        int col, row;

-       
-       if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
-               return;
-       
-       xw.w = e->xconfigure.width;
-       xw.h = e->xconfigure.height;
-       xw.bufw = xw.w - 2*BORDER;
-       xw.bufh = xw.h - 2*BORDER;
-       col = xw.bufw / xw.cw;
-       row = xw.bufh / xw.ch;
+
+       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);
        tresize(col, row);

-       ttyresize(col, row);
-       xw.bufh = MAX(1, xw.bufh);
-       xw.bufw = MAX(1, xw.bufw);
-       XFreePixmap(xw.dis, xw.buf);
-       xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
+       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
 }
 
 void

-run(void) {
+run(void)
+{

        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 */
+       do {
+               XNextEvent(xw.dpy, &ev);
+               /*
+                * This XFilterEvent call is required because of XOpenIM. It
+                * does filter out the key event and some client message for
+                * the input method too.
+                */
+               if (XFilterEvent(&ev, None))
+                       continue;
+               if (ev.type == ConfigureNotify) {
+                       w = ev.xconfigure.width;
+                       h = ev.xconfigure.height;
+               }
+       } while (ev.type != MapNotify);
+
+       ttynew();
+       cresize(w, h);
+
+       clock_gettime(CLOCK_MONOTONIC, &last);
+       lastblink = last;

 
 

-       for(;;) {
+       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);

-               if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) < 0) {
-                       if(errno == EINTR)
+
+               if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
+                       if (errno == EINTR)

                                continue;
                                continue;

-                       die("select failed: %s\n", SERRNO);
+                       die("select failed: %s\n", strerror(errno));

                }
                }

-               if(FD_ISSET(cmdfd, &rfd)) {
+               if (FD_ISSET(cmdfd, &rfd)) {

                        ttyread();
                        ttyread();

-                       draw(SCREEN_UPDATE); 
+                       if (blinktimeout) {
+                               blinkset = tattrset(ATTR_BLINK);
+                               if (!blinkset)
+                                       MODBIT(term.mode, 0, MODE_BLINK);
+                       }

                }
                }

-               while(XPending(xw.dis)) {
-                       XNextEvent(xw.dis, &ev);
-                       if (XFilterEvent(&ev, xw.win))
-                               continue;
-                       if(handler[ev.type])
-                               (handler[ev.type])(&ev);
+
+               if (FD_ISSET(xfd, &rfd))
+                       xev = actionfps;
+
+               clock_gettime(CLOCK_MONOTONIC, &now);
+               drawtimeout.tv_sec = 0;
+               drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
+               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 > 1000 / (xev ? xfps : actionfps)) {
+                       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)));
+                                       }
+                                       drawtimeout.tv_sec = \
+                                           drawtimeout.tv_nsec / 1E9;
+                                       drawtimeout.tv_nsec %= (long)1E9;
+                               } else {
+                                       tv = NULL;
+                               }
+                       }

                }
        }
 }
 
                }
        }
 }
 

+void
+usage(void)
+{
+       die("%s " VERSION " (c) 2010-2015 st engineers\n"
+       "usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
+       "          [-i] [-t title] [-w windowid] [-e command ...] [command ...]\n"
+       "       st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]\n"
+       "          [-i] [-t title] [-w windowid] [-l line] [stty_args ...]\n",
+       argv0);
+}
+

 int
 int

-main(int argc, char *argv[]) {
-       int i;
-       
-       for(i = 1; i < argc; i++) {
-               switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
-               case 't':
-                       if(++i < argc) opt_title = argv[i];
-                       break;
-               case 'e':
-                       if(++i < argc) opt_cmd = argv[i];
-                       break;
-               case 'v':
-               default:
-                       die(USAGE);
-               }
+main(int argc, char *argv[])
+{
+       uint cols = 80, rows = 24;
+
+       xw.l = xw.t = 0;
+       xw.isfixed = False;
+       xw.cursor = 0;
+
+       ARGBEGIN {
+       case 'a':
+               allowaltscreen = 0;
+               break;
+       case 'c':
+               opt_class = EARGF(usage());
+               break;
+       case 'e':
+               if (argc > 0)
+                       --argc, ++argv;
+               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 = 1;
+               break;
+       case 'o':
+               opt_io = EARGF(usage());
+               break;
+       case 'l':
+               opt_line = EARGF(usage());
+               break;
+       case 't':
+               opt_title = EARGF(usage());
+               break;
+       case 'w':
+               opt_embed = EARGF(usage());
+               break;
+       case 'v':
+       default:
+               usage();
+       } ARGEND;
+
+run:
+       if (argc > 0) {
+               /* eat all remaining arguments */
+               opt_cmd = argv;
+               if (!opt_title && !opt_line)
+                       opt_title = basename(xstrdup(argv[0]));

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

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

        xinit();
        selinit();
        run();
        xinit();
        selinit();
        run();

+

        return 0;
 }
        return 0;
 }

+