follow-up fix for OSC color sequences, return

[st.git] / st.c

diff --git a/st.c b/st.c
index 3460a37..6783c2b 100644 (file)
--- a/st.c
+++ b/st.c
@@ -3,40 +3,22 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>

-#include <locale.h>

 #include <pwd.h>
 #include <stdarg.h>
 #include <pwd.h>
 #include <stdarg.h>

-#include <stdbool.h>

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <signal.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/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 <termios.h>

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

-#include <libgen.h>
-#include <X11/Xatom.h>
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-#include <X11/cursorfont.h>
-#include <X11/keysym.h>
-#include <X11/Xft/Xft.h>
-#include <X11/XKBlib.h>
-#include <fontconfig/fontconfig.h>

 #include <wchar.h>
 
 #include <wchar.h>
 

-#include "arg.h"
-
-char *argv0;
-
-#define Glyph Glyph_
-#define Font Font_
+#include "st.h"
+#include "win.h"

 
 #if   defined(__linux)
  #include <pty.h>
 
 #if   defined(__linux)
  #include <pty.h>


@@ -46,11 +28,6 @@ char *argv0;
  #include <libutil.h>
 #endif
 
  #include <libutil.h>
 #endif
 

-
-/* XEMBED messages */
-#define XEMBED_FOCUS_IN  4
-#define XEMBED_FOCUS_OUT 5
-

 /* Arbitrary sizes */
 #define UTF_INVALID   0xFFFD
 #define UTF_SIZ       4
 /* Arbitrary sizes */
 #define UTF_INVALID   0xFFFD
 #define UTF_SIZ       4


@@ -58,47 +35,22 @@ char *argv0;
 #define ESC_ARG_SIZ   16
 #define STR_BUF_SIZ   ESC_BUF_SIZ
 #define STR_ARG_SIZ   ESC_ARG_SIZ
 #define ESC_ARG_SIZ   16
 #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 */
 
 /* 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,
+#define IS_SET(flag)           ((term.mode & (flag)) != 0)
+#define ISCONTROLC0(c)         (BETWEEN(c, 0, 0x1f) || (c) == 0x7f)
+#define ISCONTROLC1(c)         (BETWEEN(c, 0x80, 0x9f))
+#define ISCONTROL(c)           (ISCONTROLC0(c) || ISCONTROLC1(c))
+#define ISDELIM(u)             (u && wcschr(worddelimiters, u))
+
+enum term_mode {
+       MODE_WRAP        = 1 << 0,
+       MODE_INSERT      = 1 << 1,
+       MODE_ALTSCREEN   = 1 << 2,
+       MODE_CRLF        = 1 << 3,
+       MODE_ECHO        = 1 << 4,
+       MODE_PRINT       = 1 << 5,
+       MODE_UTF8        = 1 << 6,

 };
 
 enum cursor_movement {
 };
 
 enum cursor_movement {


@@ -112,32 +64,6 @@ enum cursor_state {
        CURSOR_ORIGIN   = 2
 };
 
        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,
 enum charset {
        CS_GRAPHIC0,
        CS_GRAPHIC1,


@@ -155,48 +81,9 @@ enum escape_state {
        ESC_ALTCHARSET = 8,
        ESC_STR_END    = 16, /* a final string was encountered */
        ESC_TEST       = 32, /* Enter in test mode */
        ESC_ALTCHARSET = 8,
        ESC_STR_END    = 16, /* a final string was encountered */
        ESC_TEST       = 32, /* Enter in test mode */

+       ESC_UTF8       = 64,

 };
 
 };
 

-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 {
-       Rune u;           /* character code */
-       ushort mode;      /* attribute flags */
-       ushort fg;        /* foreground  */
-       ushort bg;        /* background  */
-} Glyph;
-
-typedef Glyph *Line;
-

 typedef struct {
        Glyph attr; /* current char attributes */
        int x;
 typedef struct {
        Glyph attr; /* current char attributes */
        int x;


@@ -204,26 +91,23 @@ typedef struct {
        char state;
 } TCursor;
 
        char state;
 } TCursor;
 

-/* CSI Escape sequence structs */
-/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */

 typedef struct {
 typedef struct {

-       char buf[ESC_BUF_SIZ]; /* raw string */
-       int len;               /* raw string length */
-       char priv;
-       int arg[ESC_ARG_SIZ];
-       int narg;              /* nb of args */
-       char mode[2];
-} CSIEscape;
+       int mode;
+       int type;
+       int snap;
+       /*
+        * Selection variables:
+        * nb – normalized coordinates of the beginning of the selection
+        * ne – normalized coordinates of the end of the selection
+        * ob – original coordinates of the beginning of the selection
+        * oe – original coordinates of the end of the selection
+        */
+       struct {
+               int x, y;
+       } nb, ne, ob, oe;

 
 

-/* 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;
+       int alt;
+} Selection;

 
 /* Internal representation of the screen */
 typedef struct {
 
 /* Internal representation of the screen */
 typedef struct {


@@ -231,9 +115,10 @@ typedef struct {
        int col;      /* nb col */
        Line *line;   /* screen */
        Line *alt;    /* alternate screen */
        int col;      /* nb col */
        Line *line;   /* screen */
        Line *alt;    /* alternate screen */

-       bool *dirty;  /* dirtyness of lines */
-       XftGlyphFontSpec *specbuf; /* font spec buffer used for rendering */
+       int *dirty;   /* dirtyness of lines */

        TCursor c;    /* cursor */
        TCursor c;    /* cursor */

+       int ocx;      /* old cursor col */
+       int ocy;      /* old cursor row */

        int top;      /* top    scroll limit */
        int bot;      /* bottom scroll limit */
        int mode;     /* terminal mode flags */
        int top;      /* top    scroll limit */
        int bot;      /* bottom scroll limit */
        int mode;     /* terminal mode flags */


@@ -241,129 +126,36 @@ typedef struct {
        char trantbl[4]; /* charset table translation */
        int charset;  /* current charset */
        int icharset; /* selected charset for sequence */
        char trantbl[4]; /* charset table translation */
        int charset;  /* current charset */
        int icharset; /* selected charset for sequence */

-       bool numlock; /* lock numbers in keyboard */
-       bool *tabs;
+       int *tabs;
+       Rune lastc;   /* last printed char outside of sequence, 0 if control */

 } Term;
 
 } Term;
 

-/* Purely graphic info */
-typedef struct {
-       Display *dpy;
-       Colormap cmap;
-       Window win;
-       Drawable buf;
-       Atom xembed, wmdeletewin, netwmname, netwmpid;
-       XIM xim;
-       XIC xic;
-       Draw draw;
-       Visual *vis;
-       XSetWindowAttributes attrs;
-       int scr;
-       bool isfixed; /* is fixed geometry? */
-       int l, t; /* left and top offset */
-       int gm; /* geometry mask */
-       int tw, th; /* tty width and height */
-       int w, h; /* window width and height */
-       int ch; /* char height */
-       int cw; /* char width  */
-       char state; /* focus, redraw, visible */
-       int cursor; /* cursor style */
-} XWindow;
-
-typedef struct {
-       uint b;
-       uint mask;
-       char *s;
-} Mousekey;
-
+/* CSI Escape sequence structs */
+/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */

 typedef struct {
 typedef struct {

-       KeySym k;
-       uint mask;
-       char *s;
-       /* three valued logic variables: 0 indifferent, 1 on, -1 off */
-       signed char appkey;    /* application keypad */
-       signed char appcursor; /* application cursor */
-       signed char crlf;      /* crlf mode          */
-} Key;
+       char buf[ESC_BUF_SIZ]; /* raw string */
+       size_t len;            /* raw string length */
+       char priv;
+       int arg[ESC_ARG_SIZ];
+       int narg;              /* nb of args */
+       char mode[2];
+} CSIEscape;

 
 

+/* STR Escape sequence structs */
+/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */

 typedef struct {
 typedef struct {

-       int mode;
-       int type;
-       int snap;
-       /*
-        * Selection variables:
-        * nb – normalized coordinates of the beginning of the selection
-        * ne – normalized coordinates of the end of the selection
-        * ob – original coordinates of the beginning of the selection
-        * oe – original coordinates of the end of the selection
-        */
-       struct {
-               int x, y;
-       } nb, ne, ob, oe;
-
-       char *primary, *clipboard;
-       Atom xtarget;
-       bool alt;
-       struct timespec tclick1;
-       struct timespec tclick2;
-} Selection;
-
-typedef union {
-       int i;
-       uint ui;
-       float f;
-       const void *v;
-} Arg;
+       char type;             /* ESC type ... */
+       char *buf;             /* allocated raw string */
+       size_t siz;            /* allocation size */
+       size_t len;            /* raw string length */
+       char *args[STR_ARG_SIZ];
+       int narg;              /* nb of args */
+} STREscape;

 
 

-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"
-
-/* 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 stty(void);
+static void execsh(char *, char **);
+static void stty(char **);

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

-static void run(void);
+static void ttywriteraw(const char *, size_t);

 
 static void csidump(void);
 static void csihandle(void);
 
 static void csidump(void);
 static void csihandle(void);


@@ -375,7 +167,6 @@ static void strhandle(void);
 static void strparse(void);
 static void strreset(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 tprinter(char *, size_t);
 static void tdumpsel(void);
 static void tdumpline(int);


@@ -389,329 +180,303 @@ static void tinsertblankline(int);
 static int tlinelen(int);
 static void tmoveto(int, int);
 static void tmoveato(int, int);
 static int tlinelen(int);
 static void tmoveto(int, int);
 static void tmoveato(int, int);

-static void tnew(int, int);

 static void tnewline(int);
 static void tputtab(int);
 static void tputc(Rune);
 static void treset(void);
 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 tscrollup(int, int);
 static void tscrolldown(int, int);

-static void tsetattr(int *, int);
-static void tsetchar(Rune, Glyph *, int, int);
+static void tsetattr(const int *, int);
+static void tsetchar(Rune, const Glyph *, int, int);
+static void tsetdirt(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(bool, bool, int *, int);
+static void tsetmode(int, int, const int *, int);
+static int twrite(const char *, int, int);

 static void tfulldirt(void);
 static void tfulldirt(void);

-static void techo(Rune);

 static void tcontrolcode(uchar );
 static void tdectest(char );
 static void tcontrolcode(uchar );
 static void tdectest(char );

-static int32_t tdefcolor(int *, int *, int);
+static void tdefutf8(char);
+static int32_t tdefcolor(const int *, int *, int);

 static void tdeftran(char);
 static void tdeftran(char);

-static inline bool match(uint, uint);
-static void ttynew(void);
-static void ttyread(void);
-static void ttyresize(void);
-static void ttysend(char *, size_t);
-static void ttywrite(const char *, size_t);

 static void tstrsequence(uchar);
 
 static void tstrsequence(uchar);
 

-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 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 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 char *kmap(KeySym, uint);
-static void kpress(XEvent *);
-static void cmessage(XEvent *);
-static void cresize(int, int);
-static void resize(XEvent *);
-static void focus(XEvent *);
-static void brelease(XEvent *);
-static void bpress(XEvent *);
-static void bmotion(XEvent *);
-static void selnotify(XEvent *);
-static void selclear(XEvent *);
-static void selrequest(XEvent *);
-
-static void selinit(void);
+static void drawregion(int, int, int, int);
+

 static void selnormalize(void);
 static void selnormalize(void);

-static inline bool selected(int, int);
-static char *getsel(void);
-static void selcopy(Time);

 static void selscroll(int, int);
 static void selsnap(int *, int *, int);
 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 size_t utf8decode(const char *, Rune *, size_t);

 static Rune utf8decodebyte(char, size_t *);
 static Rune utf8decodebyte(char, size_t *);

-static size_t utf8encode(Rune, char *);

 static char utf8encodebyte(Rune, size_t);
 static char utf8encodebyte(Rune, size_t);

-static char *utf8strchr(char *s, Rune u);

 static size_t utf8validate(Rune *, size_t);
 
 static size_t utf8validate(Rune *, size_t);
 

+static char *base64dec(const char *);
+static char base64dec_getc(const char **);
+

 static ssize_t xwrite(int, const char *, size_t);
 static ssize_t xwrite(int, const char *, size_t);

-static void *xmalloc(size_t);
-static void *xrealloc(void *, size_t);
-static char *xstrdup(char *);
-
-static void usage(void);
-
-static void (*handler[LASTEvent])(XEvent *) = {
-       [KeyPress] = kpress,
-       [ClientMessage] = cmessage,
-       [ConfigureNotify] = resize,
-       [VisibilityNotify] = visibility,
-       [UnmapNotify] = unmap,
-       [Expose] = expose,
-       [FocusIn] = focus,
-       [FocusOut] = focus,
-       [MotionNotify] = bmotion,
-       [ButtonPress] = bpress,
-       [ButtonRelease] = brelease,
-/*
- * Uncomment if you want the selection to disappear when you select something
- * different in another window.
- */
-/*     [SelectionClear] = selclear, */
-       [SelectionNotify] = selnotify,
-       [SelectionRequest] = selrequest,
-};

 
 /* Globals */
 
 /* Globals */

-static DC dc;
-static XWindow xw;

 static Term term;
 static Term term;

+static Selection sel;

 static CSIEscape csiescseq;
 static STREscape strescseq;
 static CSIEscape csiescseq;
 static STREscape strescseq;

+static int iofd = 1;

 static int cmdfd;
 static pid_t pid;
 static int cmdfd;
 static pid_t pid;

-static Selection sel;
-static int iofd = STDOUT_FILENO;
-static char **opt_cmd = NULL;
-static char *opt_io = NULL;
-static char *opt_title = NULL;
-static char *opt_embed = NULL;
-static char *opt_class = NULL;
-static char *opt_font = NULL;
-static 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
-};
-
-typedef struct {
-       XftFont *font;
-       int flags;
-       Rune unicodep;
-} Fontcache;

 
 

-/* Fontcache is an array now. A new font will be appended to the array. */
-static Fontcache frc[16];
-static int frclen = 0;
+static const uchar utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
+static const uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+static const Rune utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
+static const Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};

 
 ssize_t
 
 ssize_t

-xwrite(int fd, const char *s, size_t len) {
+xwrite(int fd, const char *s, size_t len)
+{

        size_t aux = len;
        size_t aux = len;

+       ssize_t r;

 
 

-       while(len > 0) {
-               ssize_t r = write(fd, s, len);
-               if(r < 0)
+       while (len > 0) {
+               r = write(fd, s, len);
+               if (r < 0)

                        return r;
                len -= r;
                s += r;
        }
                        return r;
                len -= r;
                s += r;
        }

+

        return aux;
 }
 
 void *
        return aux;
 }
 
 void *

-xmalloc(size_t len) {
-       void *p = malloc(len);
+xmalloc(size_t len)
+{
+       void *p;

 
 

-       if(!p)
-               die("Out of memory\n");
+       if (!(p = malloc(len)))
+               die("malloc: %s\n", strerror(errno));

 
        return p;
 }
 
 void *
 
        return p;
 }
 
 void *

-xrealloc(void *p, size_t len) {
-       if((p = realloc(p, len)) == NULL)
-               die("Out of memory\n");
+xrealloc(void *p, size_t len)
+{
+       if ((p = realloc(p, len)) == NULL)
+               die("realloc: %s\n", strerror(errno));

 
        return p;
 }
 
 char *
 
        return p;
 }
 
 char *

-xstrdup(char *s) {
-       if((s = strdup(s)) == NULL)
-               die("Out of memory\n");
+xstrdup(const char *s)
+{
+       char *p;

 
 

-       return s;
+       if ((p = strdup(s)) == NULL)
+               die("strdup: %s\n", strerror(errno));
+
+       return p;

 }
 
 size_t
 }
 
 size_t

-utf8decode(char *c, Rune *u, size_t clen) {
+utf8decode(const char *c, Rune *u, size_t clen)
+{

        size_t i, j, len, type;
        Rune udecoded;
 
        *u = UTF_INVALID;
        size_t i, j, len, type;
        Rune udecoded;
 
        *u = UTF_INVALID;

-       if(!clen)
+       if (!clen)

                return 0;
        udecoded = utf8decodebyte(c[0], &len);
                return 0;
        udecoded = utf8decodebyte(c[0], &len);

-       if(!BETWEEN(len, 1, UTF_SIZ))
+       if (!BETWEEN(len, 1, UTF_SIZ))

                return 1;
                return 1;

-       for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
+       for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {

                udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
                udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);

-               if(type != 0)
+               if (type != 0)

                        return j;
        }
                        return j;
        }

-       if(j < len)
+       if (j < len)

                return 0;
        *u = udecoded;
        utf8validate(u, len);
                return 0;
        *u = udecoded;
        utf8validate(u, len);

+

        return len;
 }
 
 Rune
        return len;
 }
 
 Rune

-utf8decodebyte(char c, size_t *i) {
-       for(*i = 0; *i < LEN(utfmask); ++(*i))
-               if(((uchar)c & utfmask[*i]) == utfbyte[*i])
+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 (uchar)c & ~utfmask[*i];

+

        return 0;
 }
 
 size_t
        return 0;
 }
 
 size_t

-utf8encode(Rune u, char *c) {
+utf8encode(Rune u, char *c)
+{

        size_t len, i;
 
        len = utf8validate(&u, 0);
        size_t len, i;
 
        len = utf8validate(&u, 0);

-       if(len > UTF_SIZ)
+       if (len > UTF_SIZ)

                return 0;
                return 0;

-       for(i = len - 1; i != 0; --i) {
+
+       for (i = len - 1; i != 0; --i) {

                c[i] = utf8encodebyte(u, 0);
                u >>= 6;
        }
        c[0] = utf8encodebyte(u, len);
                c[i] = utf8encodebyte(u, 0);
                u >>= 6;
        }
        c[0] = utf8encodebyte(u, len);

+

        return len;
 }
 
 char
        return len;
 }
 
 char

-utf8encodebyte(Rune u, size_t i) {
+utf8encodebyte(Rune u, size_t i)
+{

        return utfbyte[i] | (u & ~utfmask[i]);
 }
 
        return utfbyte[i] | (u & ~utfmask[i]);
 }
 

-char *
-utf8strchr(char *s, Rune u) {
-       Rune r;
-       size_t i, j, len;
-
-       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]);
-       }
-       return NULL;
-}
-

 size_t
 size_t

-utf8validate(Rune *u, size_t i) {
-       if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
+utf8validate(Rune *u, size_t i)
+{
+       if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))

                *u = UTF_INVALID;
                *u = UTF_INVALID;

-       for(i = 1; *u > utfmax[i]; ++i)
+       for (i = 1; *u > utfmax[i]; ++i)

                ;
                ;

+

        return i;
 }
 
        return i;
 }
 

-void
-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;
+static const char base64_digits[] = {
+       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0,
+       63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, -1, 0, 0, 0, 0, 1,
+       2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
+       22, 23, 24, 25, 0, 0, 0, 0, 0, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34,
+       35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 0,
+       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+char
+base64dec_getc(const char **src)
+{
+       while (**src && !isprint(**src))
+               (*src)++;
+       return **src ? *((*src)++) : '=';  /* emulate padding if string ends */

 }
 
 }
 

-int
-x2col(int x) {
-       x -= borderpx;
-       x /= xw.cw;
+char *
+base64dec(const char *src)
+{
+       size_t in_len = strlen(src);
+       char *result, *dst;
+
+       if (in_len % 4)
+               in_len += 4 - (in_len % 4);
+       result = dst = xmalloc(in_len / 4 * 3 + 1);
+       while (*src) {
+               int a = base64_digits[(unsigned char) base64dec_getc(&src)];
+               int b = base64_digits[(unsigned char) base64dec_getc(&src)];
+               int c = base64_digits[(unsigned char) base64dec_getc(&src)];
+               int d = base64_digits[(unsigned char) base64dec_getc(&src)];
+
+               /* invalid input. 'a' can be -1, e.g. if src is "\n" (c-str) */
+               if (a == -1 || b == -1)
+                       break;

 
 

-       return LIMIT(x, 0, term.col-1);
+               *dst++ = (a << 2) | ((b & 0x30) >> 4);
+               if (c == -1)
+                       break;
+               *dst++ = ((b & 0x0f) << 4) | ((c & 0x3c) >> 2);
+               if (d == -1)
+                       break;
+               *dst++ = ((c & 0x03) << 6) | d;
+       }
+       *dst = '\0';
+       return result;

 }
 
 }
 

-int
-y2row(int y) {
-       y -= borderpx;
-       y /= xw.ch;
-
-       return LIMIT(y, 0, term.row-1);
+void
+selinit(void)
+{
+       sel.mode = SEL_IDLE;
+       sel.snap = 0;
+       sel.ob.x = -1;

 }
 
 int
 }
 
 int

-tlinelen(int y) {
+tlinelen(int y)
+{

        int i = term.col;
 
        int i = term.col;
 

-       if(term.line[y][i - 1].mode & ATTR_WRAP)
+       if (term.line[y][i - 1].mode & ATTR_WRAP)

                return i;
 
                return i;
 

-       while(i > 0 && term.line[y][i - 1].u == ' ')
+       while (i > 0 && term.line[y][i - 1].u == ' ')

                --i;
 
        return i;
 }
 
 void
                --i;
 
        return i;
 }
 
 void

-selnormalize(void) {
+selstart(int col, int row, int snap)
+{
+       selclear();
+       sel.mode = SEL_EMPTY;
+       sel.type = SEL_REGULAR;
+       sel.alt = IS_SET(MODE_ALTSCREEN);
+       sel.snap = snap;
+       sel.oe.x = sel.ob.x = col;
+       sel.oe.y = sel.ob.y = row;
+       selnormalize();
+
+       if (sel.snap != 0)
+               sel.mode = SEL_READY;
+       tsetdirt(sel.nb.y, sel.ne.y);
+}
+
+void
+selextend(int col, int row, int type, int done)
+{
+       int oldey, oldex, oldsby, oldsey, oldtype;
+
+       if (sel.mode == SEL_IDLE)
+               return;
+       if (done && sel.mode == SEL_EMPTY) {
+               selclear();
+               return;
+       }
+
+       oldey = sel.oe.y;
+       oldex = sel.oe.x;
+       oldsby = sel.nb.y;
+       oldsey = sel.ne.y;
+       oldtype = sel.type;
+
+       sel.oe.x = col;
+       sel.oe.y = row;
+       selnormalize();
+       sel.type = type;
+
+       if (oldey != sel.oe.y || oldex != sel.oe.x || oldtype != sel.type || sel.mode == SEL_EMPTY)
+               tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
+
+       sel.mode = done ? SEL_IDLE : SEL_READY;
+}
+
+void
+selnormalize(void)
+{

        int i;
 
        int i;
 

-       if(sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
+       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 = 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 {


@@ -734,12 +499,14 @@ selnormalize(void) {
                sel.ne.x = term.col - 1;
 }
 
                sel.ne.x = term.col - 1;
 }
 

-bool
-selected(int x, int y) {
-       if(sel.mode == SEL_EMPTY)
-               return false;
+int
+selected(int x, int y)
+{
+       if (sel.mode == SEL_EMPTY || sel.ob.x == -1 ||
+                       sel.alt != IS_SET(MODE_ALTSCREEN))
+               return 0;

 
 

-       if(sel.type == SEL_RECTANGULAR)
+       if (sel.type == SEL_RECTANGULAR)

                return BETWEEN(y, sel.nb.y, sel.ne.y)
                    && BETWEEN(x, sel.nb.x, sel.ne.x);
 
                return BETWEEN(y, sel.nb.y, sel.ne.y)
                    && BETWEEN(x, sel.nb.x, sel.ne.x);
 


@@ -749,12 +516,13 @@ selected(int x, int y) {
 }
 
 void
 }
 
 void

-selsnap(int *x, int *y, int direction) {
+selsnap(int *x, int *y, int direction)
+{

        int newx, newy, xt, yt;
        int newx, newy, xt, yt;

-       bool delim, prevdelim;
-       Glyph *gp, *prevgp;
+       int delim, prevdelim;
+       const Glyph *gp, *prevgp;

 
 

-       switch(sel.snap) {
+       switch (sel.snap) {

        case SNAP_WORD:
                /*
                 * Snap around if the word wraps around at the end or
        case SNAP_WORD:
                /*
                 * Snap around if the word wraps around at the end or


@@ -762,20 +530,20 @@ selsnap(int *x, int *y, int direction) {
                 */
                prevgp = &term.line[*y][*x];
                prevdelim = ISDELIM(prevgp->u);
                 */
                prevgp = &term.line[*y][*x];
                prevdelim = ISDELIM(prevgp->u);

-               for(;;) {
+               for (;;) {

                        newx = *x + direction;
                        newy = *y;
                        newx = *x + direction;
                        newy = *y;

-                       if(!BETWEEN(newx, 0, term.col - 1)) {
+                       if (!BETWEEN(newx, 0, term.col - 1)) {

                                newy += direction;
                                newx = (newx + term.col) % term.col;
                                if (!BETWEEN(newy, 0, term.row - 1))
                                        break;
 
                                newy += direction;
                                newx = (newx + term.col) % term.col;
                                if (!BETWEEN(newy, 0, term.row - 1))
                                        break;
 

-                               if(direction > 0)
+                               if (direction > 0)

                                        yt = *y, xt = *x;
                                else
                                        yt = newy, xt = newx;
                                        yt = *y, xt = *x;
                                else
                                        yt = newy, xt = newx;

-                               if(!(term.line[yt][xt].mode & ATTR_WRAP))
+                               if (!(term.line[yt][xt].mode & ATTR_WRAP))

                                        break;
                        }
 
                                        break;
                        }
 


@@ -784,7 +552,7 @@ selsnap(int *x, int *y, int direction) {
 
                        gp = &term.line[newy][newx];
                        delim = ISDELIM(gp->u);
 
                        gp = &term.line[newy][newx];
                        delim = ISDELIM(gp->u);

-                       if(!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
+                       if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim

                                        || (delim && gp->u != prevgp->u)))
                                break;
 
                                        || (delim && gp->u != prevgp->u)))
                                break;
 


@@ -801,16 +569,16 @@ selsnap(int *x, int *y, int direction) {
                 * previous line will be selected.
                 */
                *x = (direction < 0) ? 0 : term.col - 1;
                 * 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
+               if (direction < 0) {
+                       for (; *y > 0; *y += direction) {
+                               if (!(term.line[*y-1][term.col-1].mode

                                                & ATTR_WRAP)) {
                                        break;
                                }
                        }
                                                & ATTR_WRAP)) {
                                        break;
                                }
                        }

-               } else if(direction > 0) {
-                       for(; *y < term.row-1; *y += direction) {
-                               if(!(term.line[*y][term.col-1].mode
+               } else if (direction > 0) {
+                       for (; *y < term.row-1; *y += direction) {
+                               if (!(term.line[*y][term.col-1].mode

                                                & ATTR_WRAP)) {
                                        break;
                                }
                                                & ATTR_WRAP)) {
                                        break;
                                }


@@ -820,155 +588,27 @@ selsnap(int *x, int *y, int direction) {
        }
 }
 
        }
 }
 

-void
-getbuttoninfo(XEvent *e) {
-       int type;
-       uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
-
-       sel.alt = IS_SET(MODE_ALTSCREEN);
-
-       sel.oe.x = x2col(e->xbutton.x);
-       sel.oe.y = y2row(e->xbutton.y);
-       selnormalize();
-
-       sel.type = SEL_REGULAR;
-       for(type = 1; type < LEN(selmasks); ++type) {
-               if(match(selmasks[type], state)) {
-                       sel.type = type;
-                       break;
-               }
-       }
-}
-
-void
-mousereport(XEvent *e) {
-       int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
-           button = e->xbutton.button, state = e->xbutton.state,
-           len;
-       char buf[40];
-       static int ox, oy;
-
-       /* from urxvt */
-       if(e->xbutton.type == MotionNotify) {
-               if(x == ox && y == oy)
-                       return;
-               if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
-                       return;
-               /* MOUSE_MOTION: no reporting if no button is pressed */
-               if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
-                       return;
-
-               button = oldbutton + 32;
-               ox = x;
-               oy = y;
-       } else {
-               if(!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
-                       button = 3;
-               } else {
-                       button -= Button1;
-                       if(button >= 3)
-                               button += 64 - 3;
-               }
-               if(e->xbutton.type == ButtonPress) {
-                       oldbutton = button;
-                       ox = x;
-                       oy = y;
-               } else if(e->xbutton.type == ButtonRelease) {
-                       oldbutton = 3;
-                       /* MODE_MOUSEX10: no button release reporting */
-                       if(IS_SET(MODE_MOUSEX10))
-                               return;
-                       if (button == 64 || button == 65)
-                               return;
-               }
-       }
-
-       if(!IS_SET(MODE_MOUSEX10)) {
-               button += ((state & ShiftMask  ) ? 4  : 0)
-                       + ((state & Mod4Mask   ) ? 8  : 0)
-                       + ((state & ControlMask) ? 16 : 0);
-       }
-
-       if(IS_SET(MODE_MOUSESGR)) {
-               len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
-                               button, x+1, y+1,
-                               e->xbutton.type == ButtonRelease ? 'm' : 'M');
-       } else if(x < 223 && y < 223) {
-               len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
-                               32+button, 32+x+1, 32+y+1);
-       } else {
-               return;
-       }
-
-       ttywrite(buf, len);
-}
-
-void
-bpress(XEvent *e) {
-       struct timespec now;
-       Mousekey *mk;
-
-       if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
-               mousereport(e);
-               return;
-       }
-
-       for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
-               if(e->xbutton.button == mk->b
-                               && match(mk->mask, e->xbutton.state)) {
-                       ttysend(mk->s, strlen(mk->s));
-                       return;
-               }
-       }
-
-       if(e->xbutton.button == Button1) {
-               clock_gettime(CLOCK_MONOTONIC, &now);
-
-               /* Clear previous selection, logically and visually. */
-               selclear(NULL);
-               sel.mode = 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();
-
-               if(sel.snap != 0)
-                       sel.mode = SEL_READY;
-               tsetdirt(sel.nb.y, sel.ne.y);
-               sel.tclick2 = sel.tclick1;
-               sel.tclick1 = now;
-       }
-}
-

 char *
 char *

-getsel(void) {
+getsel(void)
+{

        char *str, *ptr;
        int y, bufsize, lastx, linelen;
        char *str, *ptr;
        int y, bufsize, lastx, linelen;

-       Glyph *gp, *last;
+       const Glyph *gp, *last;

 
 

-       if(sel.ob.x == -1)
+       if (sel.ob.x == -1)

                return NULL;
 
        bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
        ptr = str = xmalloc(bufsize);
 
        /* append every set & selected glyph to the selection */
                return NULL;
 
        bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
        ptr = str = xmalloc(bufsize);
 
        /* append every set & selected glyph to the selection */

-       for(y = sel.nb.y; y <= sel.ne.y; y++) {
-               linelen = tlinelen(y);
+       for (y = sel.nb.y; y <= sel.ne.y; y++) {
+               if ((linelen = tlinelen(y)) == 0) {
+                       *ptr++ = '\n';
+                       continue;
+               }

 
 

-               if(sel.type == SEL_RECTANGULAR) {
+               if (sel.type == SEL_RECTANGULAR) {

                        gp = &term.line[y][sel.nb.x];
                        lastx = sel.ne.x;
                } else {
                        gp = &term.line[y][sel.nb.x];
                        lastx = sel.ne.x;
                } else {


@@ -976,11 +616,11 @@ getsel(void) {
                        lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
                }
                last = &term.line[y][MIN(lastx, linelen-1)];
                        lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
                }
                last = &term.line[y][MIN(lastx, linelen-1)];

-               while(last >= gp && last->u == ' ')
+               while (last >= gp && last->u == ' ')

                        --last;
 
                        --last;
 

-               for( ; gp <= last; ++gp) {
-                       if(gp->mode & ATTR_WDUMMY)
+               for ( ; gp <= last; ++gp) {
+                       if (gp->mode & ATTR_WDUMMY)

                                continue;
 
                        ptr += utf8encode(gp->u, ptr);
                                continue;
 
                        ptr += utf8encode(gp->u, ptr);


@@ -995,7 +635,8 @@ getsel(void) {
                 * st.
                 * FIXME: Fix the computer world.
                 */
                 * st.
                 * FIXME: Fix the computer world.
                 */

-               if((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
+               if ((y < sel.ne.y || lastx >= linelen) &&
+                   (!(last->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR))

                        *ptr++ = '\n';
        }
        *ptr = 0;
                        *ptr++ = '\n';
        }
        *ptr = 0;


@@ -1003,240 +644,57 @@ getsel(void) {
 }
 
 void
 }
 
 void

-selcopy(Time t) {
-       xsetsel(getsel(), t);
+selclear(void)
+{
+       if (sel.ob.x == -1)
+               return;
+       sel.mode = SEL_IDLE;
+       sel.ob.x = -1;
+       tsetdirt(sel.nb.y, sel.ne.y);

 }
 
 void
 }
 
 void

-selnotify(XEvent *e) {
-       ulong nitems, ofs, rem;
-       int format;
-       uchar *data, *last, *repl;
-       Atom type;
-       XSelectionEvent *xsev;
-
-       ofs = 0;
-       xsev = &e->xselection;
-       if (xsev->property == None)
-           return;
-       do {
-               if(XGetWindowProperty(xw.dpy, xw.win, xsev->property, ofs,
-                                       BUFSIZ/4, False, AnyPropertyType,
-                                       &type, &format, &nitems, &rem,
-                                       &data)) {
-                       fprintf(stderr, "Clipboard allocation failed\n");
-                       return;
-               }
-
-               /*
-                * As seen in getsel:
-                * Line endings are inconsistent in the terminal and GUI world
-                * copy and pasting. When receiving some selection data,
-                * replace all '\n' with '\r'.
-                * FIXME: Fix the computer world.
-                */
-               repl = data;
-               last = data + nitems * format / 8;
-               while((repl = memchr(repl, '\n', last - repl))) {
-                       *repl++ = '\r';
-               }
-
-               if(IS_SET(MODE_BRCKTPASTE))
-                       ttywrite("\033[200~", 6);
-               ttysend((char *)data, nitems * format / 8);
-               if(IS_SET(MODE_BRCKTPASTE))
-                       ttywrite("\033[201~", 6);
-               XFree(data);
-               /* number of 32-bit chunks returned */
-               ofs += nitems * format / 32;
-       } while(rem > 0);
-}
-
-void
-selpaste(const Arg *dummy) {
-       XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
-                       xw.win, CurrentTime);
-}
-
-void
-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);
-       }
-}
-
-void
-clippaste(const Arg *dummy) {
-       Atom clipboard;
-
-       clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
-       XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
-                       xw.win, CurrentTime);
-}
-
-void
-selclear(XEvent *e) {
-       if(sel.ob.x == -1)
-               return;
-       sel.mode = SEL_IDLE;
-       sel.ob.x = -1;
-       tsetdirt(sel.nb.y, sel.ne.y);
-}
-
-void
-selrequest(XEvent *e) {
-       XSelectionRequestEvent *xsre;
-       XSelectionEvent xev;
-       Atom xa_targets, string, clipboard;
-       char *seltext;
-
-       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, True, 0, (XEvent *) &xev))
-               fprintf(stderr, "Error sending SelectionNotify event\n");
-}
-
-void
-xsetsel(char *str, Time t) {
-       free(sel.primary);
-       sel.primary = str;
-
-       XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
-       if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
-               selclear(0);
-}
-
-void
-brelease(XEvent *e) {
-       if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
-               mousereport(e);
-               return;
-       }
-
-       if(e->xbutton.button == Button2) {
-               selpaste(NULL);
-       } else if(e->xbutton.button == Button1) {
-               if(sel.mode == SEL_READY) {
-                       getbuttoninfo(e);
-                       selcopy(e->xbutton.time);
-               } else
-                       selclear(NULL);
-               sel.mode = SEL_IDLE;
-               tsetdirt(sel.nb.y, sel.ne.y);
-       }
-}
-
-void
-bmotion(XEvent *e) {
-       int oldey, oldex, oldsby, oldsey;
-
-       if(IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
-               mousereport(e);
-               return;
-       }
-
-       if(!sel.mode)
-               return;
-
-       sel.mode = 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
-die(const char *errstr, ...) {
-       va_list ap;
+die(const char *errstr, ...)
+{
+       va_list ap;

 
        va_start(ap, errstr);
        vfprintf(stderr, errstr, ap);
        va_end(ap);
 
        va_start(ap, errstr);
        vfprintf(stderr, errstr, ap);
        va_end(ap);

-       exit(EXIT_FAILURE);
+       exit(1);

 }
 
 void
 }
 
 void

-execsh(void) {
-       char **args, *sh, *prog;
+execsh(char *cmd, char **args)
+{
+       char *sh, *prog, *arg;

        const struct passwd *pw;
        const struct passwd *pw;

-       char buf[sizeof(long) * 8 + 1];

 
        errno = 0;
 
        errno = 0;

-       if((pw = getpwuid(getuid())) == NULL) {
-               if(errno)
-                       die("getpwuid:%s\n", strerror(errno));
+       if ((pw = getpwuid(getuid())) == NULL) {
+               if (errno)
+                       die("getpwuid: %s\n", strerror(errno));

                else
                        die("who are you?\n");
        }
 
                else
                        die("who are you?\n");
        }
 

-       if (!(sh = getenv("SHELL"))) {
-               sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
-       }
+       if ((sh = getenv("SHELL")) == NULL)
+               sh = (pw->pw_shell[0]) ? pw->pw_shell : cmd;

 
 

-       if(opt_cmd)
-               prog = opt_cmd[0];
-       else if(utmp)
+       if (args) {
+               prog = args[0];
+               arg = NULL;
+       } else if (scroll) {
+               prog = scroll;
+               arg = utmp ? utmp : sh;
+       } else if (utmp) {

                prog = utmp;
                prog = utmp;

-       else
+               arg = NULL;
+       } else {

                prog = sh;
                prog = sh;

-       args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
-
-       snprintf(buf, sizeof(buf), "%lu", xw.win);
+               arg = NULL;
+       }
+       DEFAULT(args, ((char *[]) {prog, arg, NULL}));

 
        unsetenv("COLUMNS");
        unsetenv("LINES");
 
        unsetenv("COLUMNS");
        unsetenv("LINES");


@@ -1246,7 +704,6 @@ execsh(void) {
        setenv("SHELL", sh, 1);
        setenv("HOME", pw->pw_dir, 1);
        setenv("TERM", termname, 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(SIGCHLD, SIG_DFL);
        signal(SIGHUP, SIG_DFL);


@@ -1256,169 +713,253 @@ execsh(void) {
        signal(SIGALRM, SIG_DFL);
 
        execvp(prog, args);
        signal(SIGALRM, SIG_DFL);
 
        execvp(prog, args);

-       _exit(EXIT_FAILURE);
+       _exit(1);

 }
 
 void
 }
 
 void

-sigchld(int a) {
-       int stat, ret;
+sigchld(int a)
+{
+       int stat;

        pid_t p;
 
        pid_t p;
 

-       if((p = waitpid(pid, &stat, WNOHANG)) < 0)
-               die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
+       if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
+               die("waiting for pid %hd failed: %s\n", pid, strerror(errno));

 
 

-       if(pid != p)
+       if (pid != p)

                return;
 
                return;
 

-       ret = WIFEXITED(stat) ? WEXITSTATUS(stat) : EXIT_FAILURE;
-       if (ret != EXIT_SUCCESS)
-               die("child finished with error '%d'\n", stat);
-       exit(EXIT_SUCCESS);
+       if (WIFEXITED(stat) && WEXITSTATUS(stat))
+               die("child exited with status %d\n", WEXITSTATUS(stat));
+       else if (WIFSIGNALED(stat))
+               die("child terminated due to signal %d\n", WTERMSIG(stat));
+       _exit(0);

 }
 
 }
 

-

 void
 void

-stty(void)
+stty(char **args)

 {
        char cmd[_POSIX_ARG_MAX], **p, *q, *s;
        size_t n, siz;
 
 {
        char cmd[_POSIX_ARG_MAX], **p, *q, *s;
        size_t n, siz;
 

-       if((n = strlen(stty_args)) > sizeof(cmd)-1)
+       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;
                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)
+       for (p = args; p && (s = *p); ++p) {
+               if ((n = strlen(s)) > siz-1)

                        die("stty parameter length too long\n");
                *q++ = ' ';
                        die("stty parameter length too long\n");
                *q++ = ' ';

-               q = memcpy(q, s, n);
+               memcpy(q, s, n);

                q += n;
                q += n;

-               siz-= n + 1;
+               siz -= n + 1;

        }
        *q = '\0';
        if (system(cmd) != 0)
        }
        *q = '\0';
        if (system(cmd) != 0)

-           perror("Couldn't call stty");
+               perror("Couldn't call stty");

 }
 
 }
 

-void
-ttynew(void) {
+int
+ttynew(const char *line, char *cmd, const char *out, char **args)
+{

        int m, s;
        int m, s;

-       struct winsize w = {term.row, term.col, 0, 0};

 
 

-       if(opt_io) {
+       if (out) {

                term.mode |= MODE_PRINT;
                term.mode |= MODE_PRINT;

-               iofd = (!strcmp(opt_io, "-")) ?
-                         STDOUT_FILENO :
-                         open(opt_io, O_WRONLY | O_CREAT, 0666);
-               if(iofd < 0) {
+               iofd = (!strcmp(out, "-")) ?
+                         1 : open(out, O_WRONLY | O_CREAT, 0666);
+               if (iofd < 0) {

                        fprintf(stderr, "Error opening %s:%s\n",
                        fprintf(stderr, "Error opening %s:%s\n",

-                               opt_io, strerror(errno));
+                               out, strerror(errno));

                }
        }
 
                }
        }
 

-       if (opt_line) {
-               if((cmdfd = open(opt_line, O_RDWR)) < 0)
-                       die("open line failed: %s\n", strerror(errno));
-               close(STDIN_FILENO);
-               dup(cmdfd);
-               stty();
-               return;
+       if (line) {
+               if ((cmdfd = open(line, O_RDWR)) < 0)
+                       die("open line '%s' failed: %s\n",
+                           line, strerror(errno));
+               dup2(cmdfd, 0);
+               stty(args);
+               return cmdfd;

        }
 
        /* seems to work fine on linux, openbsd and freebsd */
        }
 
        /* seems to work fine on linux, openbsd and freebsd */

-       if(openpty(&m, &s, NULL, NULL, &w) < 0)
+       if (openpty(&m, &s, NULL, NULL, NULL) < 0)

                die("openpty failed: %s\n", strerror(errno));
 
                die("openpty failed: %s\n", strerror(errno));
 

-       switch(pid = fork()) {
+       switch (pid = fork()) {

        case -1:
        case -1:

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

                break;
        case 0:
                close(iofd);
                break;
        case 0:
                close(iofd);

+               close(m);

                setsid(); /* create a new process group */
                setsid(); /* create a new process group */

-               dup2(s, STDIN_FILENO);
-               dup2(s, STDOUT_FILENO);
-               dup2(s, STDERR_FILENO);
-               if(ioctl(s, TIOCSCTTY, NULL) < 0)
+               dup2(s, 0);
+               dup2(s, 1);
+               dup2(s, 2);
+               if (ioctl(s, TIOCSCTTY, NULL) < 0)

                        die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
                        die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));

-               close(s);
-               close(m);
-               execsh();
+               if (s > 2)
+                       close(s);
+#ifdef __OpenBSD__
+               if (pledge("stdio getpw proc exec", NULL) == -1)
+                       die("pledge\n");
+#endif
+               execsh(cmd, args);

                break;
        default:
                break;
        default:

+#ifdef __OpenBSD__
+               if (pledge("stdio rpath tty proc", NULL) == -1)
+                       die("pledge\n");
+#endif

                close(s);
                cmdfd = m;
                signal(SIGCHLD, sigchld);
                break;
        }
                close(s);
                cmdfd = m;
                signal(SIGCHLD, sigchld);
                break;
        }

+       return cmdfd;

 }
 
 }
 

-void
-ttyread(void) {
+size_t
+ttyread(void)
+{

        static char buf[BUFSIZ];
        static int buflen = 0;
        static char buf[BUFSIZ];
        static int buflen = 0;

-       char *ptr;
-       int charsize; /* size of utf8 char in bytes */
-       Rune unicodep;
-       int ret;
+       int ret, written;

 
        /* append read bytes to unprocessed bytes */
 
        /* 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));
+       ret = read(cmdfd, buf+buflen, LEN(buf)-buflen);

 
 

-       /* process every complete utf8 char */
-       buflen += ret;
-       ptr = buf;
-       while((charsize = utf8decode(ptr, &unicodep, buflen))) {
-               tputc(unicodep);
-               ptr += charsize;
-               buflen -= charsize;
+       switch (ret) {
+       case 0:
+               exit(0);
+       case -1:
+               die("couldn't read from shell: %s\n", strerror(errno));
+       default:
+               buflen += ret;
+               written = twrite(buf, buflen, 0);
+               buflen -= written;
+               /* keep any incomplete UTF-8 byte sequence for the next call */
+               if (buflen > 0)
+                       memmove(buf, buf + written, buflen);
+               return ret;

        }
        }

-
-       /* keep any uncomplete utf8 char for the next call */
-       memmove(buf, ptr, buflen);

 }
 
 void
 }
 
 void

-ttywrite(const char *s, size_t n) {
-       if(xwrite(cmdfd, s, n) == -1)
-               die("write error on tty: %s\n", strerror(errno));
+ttywrite(const char *s, size_t n, int may_echo)
+{
+       const char *next;
+
+       if (may_echo && IS_SET(MODE_ECHO))
+               twrite(s, n, 1);
+
+       if (!IS_SET(MODE_CRLF)) {
+               ttywriteraw(s, n);
+               return;
+       }
+
+       /* This is similar to how the kernel handles ONLCR for ttys */
+       while (n > 0) {
+               if (*s == '\r') {
+                       next = s + 1;
+                       ttywriteraw("\r\n", 2);
+               } else {
+                       next = memchr(s, '\r', n);
+                       DEFAULT(next, s + n);
+                       ttywriteraw(s, next - s);
+               }
+               n -= next - s;
+               s = next;
+       }

 }
 
 void
 }
 
 void

-ttysend(char *s, size_t n) {
-       int len;
-       Rune u;
+ttywriteraw(const char *s, size_t n)
+{
+       fd_set wfd, rfd;
+       ssize_t r;
+       size_t lim = 256;
+
+       /*
+        * 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_ZERO(&rfd);
+               FD_SET(cmdfd, &wfd);
+               FD_SET(cmdfd, &rfd);

 
 

-       ttywrite(s, n);
-       if(IS_SET(MODE_ECHO))
-               while((len = utf8decode(s, &u, n)) > 0) {
-                       techo(u);
-                       n -= len;
-                       s += len;
+               /* Check if we can write. */
+               if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) {
+                       if (errno == EINTR)
+                               continue;
+                       die("select failed: %s\n", strerror(errno));
+               }
+               if (FD_ISSET(cmdfd, &wfd)) {
+                       /*
+                        * Only write the bytes written by ttywrite() or the
+                        * default of 256. This seems to be a reasonable value
+                        * for a serial line. Bigger values might clog the I/O.
+                        */
+                       if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0)
+                               goto write_error;
+                       if (r < n) {
+                               /*
+                                * We weren't able to write out everything.
+                                * This means the buffer is getting full
+                                * again. Empty it.
+                                */
+                               if (n < lim)
+                                       lim = ttyread();
+                               n -= r;
+                               s += r;
+                       } else {
+                               /* All bytes have been written. */
+                               break;
+                       }

                }
                }

+               if (FD_ISSET(cmdfd, &rfd))
+                       lim = ttyread();
+       }
+       return;
+
+write_error:
+       die("write error on tty: %s\n", strerror(errno));

 }
 
 void
 }
 
 void

-ttyresize(void) {
+ttyresize(int tw, int th)
+{

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

-       w.ws_xpixel = xw.tw;
-       w.ws_ypixel = xw.th;
-       if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
+       w.ws_xpixel = tw;
+       w.ws_ypixel = th;
+       if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)

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

+void
+ttyhangup()
+{
+       /* Send SIGHUP to shell */
+       kill(pid, SIGHUP);
+}
+

 int
 int

-tattrset(int attr) {
+tattrset(int attr)
+{

        int i, j;
 
        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)
+       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 1;
                }
        }


@@ -1427,23 +968,25 @@ tattrset(int attr) {
 }
 
 void
 }
 
 void

-tsetdirt(int top, int bot) {
+tsetdirt(int top, int bot)
+{

        int i;
 
        LIMIT(top, 0, term.row-1);
        LIMIT(bot, 0, term.row-1);
 
        int i;
 
        LIMIT(top, 0, term.row-1);
        LIMIT(bot, 0, term.row-1);
 

-       for(i = top; i <= bot; i++)
+       for (i = top; i <= bot; i++)

                term.dirty[i] = 1;
 }
 
 void
                term.dirty[i] = 1;
 }
 
 void

-tsetdirtattr(int attr) {
+tsetdirtattr(int attr)
+{

        int i, j;
 
        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) {
+       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;
                        }
                                tsetdirt(i, i);
                                break;
                        }


@@ -1452,25 +995,28 @@ tsetdirtattr(int attr) {
 }
 
 void
 }
 
 void

-tfulldirt(void) {
+tfulldirt(void)
+{

        tsetdirt(0, term.row-1);
 }
 
 void
        tsetdirt(0, term.row-1);
 }
 
 void

-tcursor(int mode) {
+tcursor(int mode)
+{

        static TCursor c[2];
        static TCursor c[2];

-       bool alt = IS_SET(MODE_ALTSCREEN);
+       int alt = IS_SET(MODE_ALTSCREEN);

 
 

-       if(mode == CURSOR_SAVE) {
+       if (mode == CURSOR_SAVE) {

                c[alt] = term.c;
                c[alt] = term.c;

-       } else if(mode == CURSOR_LOAD) {
+       } else if (mode == CURSOR_LOAD) {

                term.c = c[alt];
                tmoveto(c[alt].x, c[alt].y);
        }
 }
 
 void
                term.c = c[alt];
                tmoveto(c[alt].x, c[alt].y);
        }
 }
 
 void

-treset(void) {
+treset(void)
+{

        uint i;
 
        term.c = (TCursor){{
        uint i;
 
        term.c = (TCursor){{


@@ -1480,15 +1026,15 @@ treset(void) {
        }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
 
        memset(term.tabs, 0, term.col * sizeof(*term.tabs));
        }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
 
        memset(term.tabs, 0, term.col * sizeof(*term.tabs));

-       for(i = tabspaces; i < term.col; i += tabspaces)
+       for (i = tabspaces; i < term.col; i += tabspaces)

                term.tabs[i] = 1;
        term.top = 0;
        term.bot = term.row - 1;
                term.tabs[i] = 1;
        term.top = 0;
        term.bot = term.row - 1;

-       term.mode = MODE_WRAP;
+       term.mode = MODE_WRAP|MODE_UTF8;

        memset(term.trantbl, CS_USA, sizeof(term.trantbl));
        term.charset = 0;
 
        memset(term.trantbl, CS_USA, sizeof(term.trantbl));
        term.charset = 0;
 

-       for(i = 0; i < 2; i++) {
+       for (i = 0; i < 2; i++) {

                tmoveto(0, 0);
                tcursor(CURSOR_SAVE);
                tclearregion(0, 0, term.col-1, term.row-1);
                tmoveto(0, 0);
                tcursor(CURSOR_SAVE);
                tclearregion(0, 0, term.col-1, term.row-1);


@@ -1497,16 +1043,16 @@ treset(void) {
 }
 
 void
 }
 
 void

-tnew(int col, int row) {
+tnew(int col, int row)
+{

        term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
        tresize(col, row);
        term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
        tresize(col, row);

-       term.numlock = 1;
-

        treset();
 }
 
 void
        treset();
 }
 
 void

-tswapscreen(void) {
+tswapscreen(void)
+{

        Line *tmp = term.line;
 
        term.line = term.alt;
        Line *tmp = term.line;
 
        term.line = term.alt;


@@ -1516,7 +1062,8 @@ tswapscreen(void) {
 }
 
 void
 }
 
 void

-tscrolldown(int orig, int n) {
+tscrolldown(int orig, int n)
+{

        int i;
        Line temp;
 
        int i;
        Line temp;
 


@@ -1525,7 +1072,7 @@ tscrolldown(int orig, int n) {
        tsetdirt(orig, term.bot-n);
        tclearregion(0, term.bot-n+1, term.col-1, term.bot);
 
        tsetdirt(orig, term.bot-n);
        tclearregion(0, term.bot-n+1, term.col-1, term.bot);
 

-       for(i = term.bot; i >= orig+n; i--) {
+       for (i = term.bot; i >= orig+n; i--) {

                temp = term.line[i];
                term.line[i] = term.line[i-n];
                term.line[i-n] = temp;
                temp = term.line[i];
                term.line[i] = term.line[i-n];
                term.line[i-n] = temp;


@@ -1535,7 +1082,8 @@ tscrolldown(int orig, int n) {
 }
 
 void
 }
 
 void

-tscrollup(int orig, int n) {
+tscrollup(int orig, int n)
+{

        int i;
        Line temp;
 
        int i;
        Line temp;
 


@@ -1544,7 +1092,7 @@ tscrollup(int orig, int n) {
        tclearregion(0, orig, term.col-1, orig+n-1);
        tsetdirt(orig+n, term.bot);
 
        tclearregion(0, orig, term.col-1, orig+n-1);
        tsetdirt(orig+n, term.bot);
 

-       for(i = orig; i <= term.bot-n; i++) {
+       for (i = orig; i <= term.bot-n; i++) {

                temp = term.line[i];
                term.line[i] = term.line[i+n];
                term.line[i+n] = temp;
                temp = term.line[i];
                term.line[i] = term.line[i+n];
                term.line[i+n] = temp;


@@ -1554,39 +1102,31 @@ tscrollup(int orig, int n) {
 }
 
 void
 }
 
 void

-selscroll(int orig, int n) {
-       if(sel.ob.x == -1)
+selscroll(int orig, int n)
+{
+       if (sel.ob.x == -1)

                return;
 
                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;
+       if (BETWEEN(sel.nb.y, orig, term.bot) != BETWEEN(sel.ne.y, orig, term.bot)) {
+               selclear();
+       } else if (BETWEEN(sel.nb.y, orig, term.bot)) {
+               sel.ob.y += n;
+               sel.oe.y += n;
+               if (sel.ob.y < term.top || sel.ob.y > term.bot ||
+                   sel.oe.y < term.top || sel.oe.y > term.bot) {
+                       selclear();

                } else {
                } else {

-                       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();

                }
                }

-               selnormalize();

        }
 }
 
 void
        }
 }
 
 void

-tnewline(int first_col) {
+tnewline(int first_col)
+{

        int y = term.c.y;
 
        int y = term.c.y;
 

-       if(y == term.bot) {
+       if (y == term.bot) {

                tscrollup(term.top, 1);
        } else {
                y++;
                tscrollup(term.top, 1);
        } else {
                y++;


@@ -1595,27 +1135,28 @@ tnewline(int first_col) {
 }
 
 void
 }
 
 void

-csiparse(void) {
+csiparse(void)
+{

        char *p = csiescseq.buf, *np;
        long int v;
 
        csiescseq.narg = 0;
        char *p = csiescseq.buf, *np;
        long int v;
 
        csiescseq.narg = 0;

-       if(*p == '?') {
+       if (*p == '?') {

                csiescseq.priv = 1;
                p++;
        }
 
        csiescseq.buf[csiescseq.len] = '\0';
                csiescseq.priv = 1;
                p++;
        }
 
        csiescseq.buf[csiescseq.len] = '\0';

-       while(p < csiescseq.buf+csiescseq.len) {
+       while (p < csiescseq.buf+csiescseq.len) {

                np = NULL;
                v = strtol(p, &np, 10);
                np = NULL;
                v = strtol(p, &np, 10);

-               if(np == p)
+               if (np == p)

                        v = 0;
                        v = 0;

-               if(v == LONG_MAX || v == LONG_MIN)
+               if (v == LONG_MAX || v == LONG_MIN)

                        v = -1;
                csiescseq.arg[csiescseq.narg++] = v;
                p = np;
                        v = -1;
                csiescseq.arg[csiescseq.narg++] = v;
                p = np;

-               if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
+               if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)

                        break;
                p++;
        }
                        break;
                p++;
        }


@@ -1625,15 +1166,17 @@ csiparse(void) {
 
 /* for absolute user moves, when decom is set */
 void
 
 /* for absolute user moves, when decom is set */
 void

-tmoveato(int x, int y) {
+tmoveato(int x, int y)
+{

        tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
 }
 
 void
        tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
 }
 
 void

-tmoveto(int x, int y) {
+tmoveto(int x, int y)
+{

        int miny, maxy;
 
        int miny, maxy;
 

-       if(term.c.state & CURSOR_ORIGIN) {
+       if (term.c.state & CURSOR_ORIGIN) {

                miny = term.top;
                maxy = term.bot;
        } else {
                miny = term.top;
                maxy = term.bot;
        } else {


@@ -1646,8 +1189,9 @@ tmoveto(int x, int y) {
 }
 
 void
 }
 
 void

-tsetchar(Rune u, Glyph *attr, int x, int y) {
-       static char *vt100_0[62] = { /* 0x41 - 0x7e */
+tsetchar(Rune u, const Glyph *attr, int x, int y)
+{
+       static const 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 */
                "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
                0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
                0, 0, 0, 0, 0, 0, 0, 0, /* P - W */


@@ -1661,16 +1205,16 @@ tsetchar(Rune u, Glyph *attr, int x, int y) {
        /*
         * The table is proudly stolen from rxvt.
         */
        /*
         * The table is proudly stolen from rxvt.
         */

-       if(term.trantbl[term.charset] == CS_GRAPHIC0 &&
+       if (term.trantbl[term.charset] == CS_GRAPHIC0 &&

           BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
                utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
 
           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) {
+       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;
                }
                        term.line[y][x+1].u = ' ';
                        term.line[y][x+1].mode &= ~ATTR_WDUMMY;
                }

-       } else if(term.line[y][x].mode & ATTR_WDUMMY) {
+       } else if (term.line[y][x].mode & ATTR_WDUMMY) {

                term.line[y][x-1].u = ' ';
                term.line[y][x-1].mode &= ~ATTR_WIDE;
        }
                term.line[y][x-1].u = ' ';
                term.line[y][x-1].mode &= ~ATTR_WIDE;
        }


@@ -1681,13 +1225,14 @@ tsetchar(Rune u, Glyph *attr, int x, int y) {
 }
 
 void
 }
 
 void

-tclearregion(int x1, int y1, int x2, int y2) {
+tclearregion(int x1, int y1, int x2, int y2)
+{

        int x, y, temp;
        Glyph *gp;
 
        int x, y, temp;
        Glyph *gp;
 

-       if(x1 > x2)
+       if (x1 > x2)

                temp = x1, x1 = x2, x2 = temp;
                temp = x1, x1 = x2, x2 = temp;

-       if(y1 > y2)
+       if (y1 > y2)

                temp = y1, y1 = y2, y2 = temp;
 
        LIMIT(x1, 0, term.col-1);
                temp = y1, y1 = y2, y2 = temp;
 
        LIMIT(x1, 0, term.col-1);


@@ -1695,12 +1240,12 @@ tclearregion(int x1, int y1, int x2, int y2) {
        LIMIT(y1, 0, term.row-1);
        LIMIT(y2, 0, term.row-1);
 
        LIMIT(y1, 0, term.row-1);
        LIMIT(y2, 0, term.row-1);
 

-       for(y = y1; y <= y2; y++) {
+       for (y = y1; y <= y2; y++) {

                term.dirty[y] = 1;
                term.dirty[y] = 1;

-               for(x = x1; x <= x2; x++) {
+               for (x = x1; x <= x2; x++) {

                        gp = &term.line[y][x];
                        gp = &term.line[y][x];

-                       if(selected(x, y))
-                               selclear(NULL);
+                       if (selected(x, y))
+                               selclear();

                        gp->fg = term.c.attr.fg;
                        gp->bg = term.c.attr.bg;
                        gp->mode = 0;
                        gp->fg = term.c.attr.fg;
                        gp->bg = term.c.attr.bg;
                        gp->mode = 0;


@@ -1710,7 +1255,8 @@ tclearregion(int x1, int y1, int x2, int y2) {
 }
 
 void
 }
 
 void

-tdeletechar(int n) {
+tdeletechar(int n)
+{

        int dst, src, size;
        Glyph *line;
 
        int dst, src, size;
        Glyph *line;
 


@@ -1726,7 +1272,8 @@ tdeletechar(int n) {
 }
 
 void
 }
 
 void

-tinsertblank(int n) {
+tinsertblank(int n)
+{

        int dst, src, size;
        Glyph *line;
 
        int dst, src, size;
        Glyph *line;
 


@@ -1742,19 +1289,22 @@ tinsertblank(int n) {
 }
 
 void
 }
 
 void

-tinsertblankline(int n) {
-       if(BETWEEN(term.c.y, term.top, term.bot))
+tinsertblankline(int n)
+{
+       if (BETWEEN(term.c.y, term.top, term.bot))

                tscrolldown(term.c.y, n);
 }
 
 void
                tscrolldown(term.c.y, n);
 }
 
 void

-tdeleteline(int n) {
-       if(BETWEEN(term.c.y, term.top, term.bot))
+tdeleteline(int n)
+{
+       if (BETWEEN(term.c.y, term.top, term.bot))

                tscrollup(term.c.y, n);
 }
 
 int32_t
                tscrollup(term.c.y, n);
 }
 
 int32_t

-tdefcolor(int *attr, int *npar, int l) {
+tdefcolor(const int *attr, int *npar, int l)
+{

        int32_t idx = -1;
        uint r, g, b;
 
        int32_t idx = -1;
        uint r, g, b;
 


@@ -1770,7 +1320,7 @@ tdefcolor(int *attr, int *npar, int l) {
                g = attr[*npar + 3];
                b = attr[*npar + 4];
                *npar += 4;
                g = attr[*npar + 3];
                b = attr[*npar + 4];
                *npar += 4;

-               if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
+               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
                        fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
                                r, g, b);
                else


@@ -1784,7 +1334,7 @@ tdefcolor(int *attr, int *npar, int l) {
                        break;
                }
                *npar += 2;
                        break;
                }
                *npar += 2;

-               if(!BETWEEN(attr[*npar], 0, 255))
+               if (!BETWEEN(attr[*npar], 0, 255))

                        fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
                else
                        idx = attr[*npar];
                        fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
                else
                        idx = attr[*npar];


@@ -1803,12 +1353,13 @@ tdefcolor(int *attr, int *npar, int l) {
 }
 
 void
 }
 
 void

-tsetattr(int *attr, int l) {
+tsetattr(const int *attr, int l)
+{

        int i;
        int32_t idx;
 
        int i;
        int32_t idx;
 

-       for(i = 0; i < l; i++) {
-               switch(attr[i]) {
+       for (i = 0; i < l; i++) {
+               switch (attr[i]) {

                case 0:
                        term.c.attr.mode &= ~(
                                ATTR_BOLD       |
                case 0:
                        term.c.attr.mode &= ~(
                                ATTR_BOLD       |


@@ -1884,18 +1435,19 @@ tsetattr(int *attr, int l) {
                        term.c.attr.bg = defaultbg;
                        break;
                default:
                        term.c.attr.bg = defaultbg;
                        break;
                default:

-                       if(BETWEEN(attr[i], 30, 37)) {
+                       if (BETWEEN(attr[i], 30, 37)) {

                                term.c.attr.fg = attr[i] - 30;
                                term.c.attr.fg = attr[i] - 30;

-                       } else if(BETWEEN(attr[i], 40, 47)) {
+                       } else if (BETWEEN(attr[i], 40, 47)) {

                                term.c.attr.bg = attr[i] - 40;
                                term.c.attr.bg = attr[i] - 40;

-                       } else if(BETWEEN(attr[i], 90, 97)) {
+                       } else if (BETWEEN(attr[i], 90, 97)) {

                                term.c.attr.fg = attr[i] - 90 + 8;
                                term.c.attr.fg = attr[i] - 90 + 8;

-                       } else if(BETWEEN(attr[i], 100, 107)) {
+                       } 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",
                                term.c.attr.bg = attr[i] - 100 + 8;
                        } else {
                                fprintf(stderr,
                                        "erresc(default): gfx attr %d unknown\n",

-                                       attr[i]), csidump();
+                                       attr[i]);
+                               csidump();

                        }
                        break;
                }
                        }
                        break;
                }


@@ -1903,12 +1455,13 @@ tsetattr(int *attr, int l) {
 }
 
 void
 }
 
 void

-tsetscroll(int t, int b) {
+tsetscroll(int t, int b)
+{

        int temp;
 
        LIMIT(t, 0, term.row-1);
        LIMIT(b, 0, term.row-1);
        int temp;
 
        LIMIT(t, 0, term.row-1);
        LIMIT(b, 0, term.row-1);

-       if(t > b) {
+       if (t > b) {

                temp = t;
                t = b;
                b = temp;
                temp = t;
                t = b;
                b = temp;


@@ -1918,21 +1471,18 @@ tsetscroll(int t, int b) {
 }
 
 void
 }
 
 void

-tsetmode(bool priv, bool set, int *args, int narg) {
-       int *lim, mode;
-       bool alt;
+tsetmode(int priv, int set, const int *args, int narg)
+{
+       int alt; const int *lim;

 
 

-       for(lim = args + narg; args < lim; ++args) {
-               if(priv) {
-                       switch(*args) {
+       for (lim = args + narg; args < lim; ++args) {
+               if (priv) {
+                       switch (*args) {

                        case 1: /* DECCKM -- Cursor key */
                        case 1: /* DECCKM -- Cursor key */

-                               MODBIT(term.mode, set, MODE_APPCURSOR);
+                               xsetmode(set, MODE_APPCURSOR);

                                break;
                        case 5: /* DECSCNM -- Reverse video */
                                break;
                        case 5: /* DECSCNM -- Reverse video */

-                               mode = term.mode;
-                               MODBIT(term.mode, set, MODE_REVERSE);
-                               if(mode != term.mode)
-                                       redraw();
+                               xsetmode(set, MODE_REVERSE);

                                break;
                        case 6: /* DECOM -- Origin */
                                MODBIT(term.c.state, set, CURSOR_ORIGIN);
                                break;
                        case 6: /* DECOM -- Origin */
                                MODBIT(term.c.state, set, CURSOR_ORIGIN);


@@ -1952,36 +1502,36 @@ tsetmode(bool priv, bool set, int *args, int narg) {
                        case 12: /* att610 -- Start blinking cursor (IGNORED) */
                                break;
                        case 25: /* DECTCEM -- Text Cursor Enable Mode */
                        case 12: /* att610 -- Start blinking cursor (IGNORED) */
                                break;
                        case 25: /* DECTCEM -- Text Cursor Enable Mode */

-                               MODBIT(term.mode, !set, MODE_HIDE);
+                               xsetmode(!set, MODE_HIDE);

                                break;
                        case 9:    /* X10 mouse compatibility mode */
                                xsetpointermotion(0);
                                break;
                        case 9:    /* X10 mouse compatibility mode */
                                xsetpointermotion(0);

-                               MODBIT(term.mode, 0, MODE_MOUSE);
-                               MODBIT(term.mode, set, MODE_MOUSEX10);
+                               xsetmode(0, MODE_MOUSE);
+                               xsetmode(set, MODE_MOUSEX10);

                                break;
                        case 1000: /* 1000: report button press */
                                xsetpointermotion(0);
                                break;
                        case 1000: /* 1000: report button press */
                                xsetpointermotion(0);

-                               MODBIT(term.mode, 0, MODE_MOUSE);
-                               MODBIT(term.mode, set, MODE_MOUSEBTN);
+                               xsetmode(0, MODE_MOUSE);
+                               xsetmode(set, MODE_MOUSEBTN);

                                break;
                        case 1002: /* 1002: report motion on button press */
                                xsetpointermotion(0);
                                break;
                        case 1002: /* 1002: report motion on button press */
                                xsetpointermotion(0);

-                               MODBIT(term.mode, 0, MODE_MOUSE);
-                               MODBIT(term.mode, set, MODE_MOUSEMOTION);
+                               xsetmode(0, MODE_MOUSE);
+                               xsetmode(set, MODE_MOUSEMOTION);

                                break;
                        case 1003: /* 1003: enable all mouse motions */
                                xsetpointermotion(set);
                                break;
                        case 1003: /* 1003: enable all mouse motions */
                                xsetpointermotion(set);

-                               MODBIT(term.mode, 0, MODE_MOUSE);
-                               MODBIT(term.mode, set, MODE_MOUSEMANY);
+                               xsetmode(0, MODE_MOUSE);
+                               xsetmode(set, MODE_MOUSEMANY);

                                break;
                        case 1004: /* 1004: send focus events to tty */
                                break;
                        case 1004: /* 1004: send focus events to tty */

-                               MODBIT(term.mode, set, MODE_FOCUS);
+                               xsetmode(set, MODE_FOCUS);

                                break;
                        case 1006: /* 1006: extended reporting mode */
                                break;
                        case 1006: /* 1006: extended reporting mode */

-                               MODBIT(term.mode, set, MODE_MOUSESGR);
+                               xsetmode(set, MODE_MOUSESGR);

                                break;
                        case 1034:
                                break;
                        case 1034:

-                               MODBIT(term.mode, set, MODE_8BIT);
+                               xsetmode(set, MODE_8BIT);

                                break;
                        case 1049: /* swap screen & set/restore cursor as xterm */
                                if (!allowaltscreen)
                                break;
                        case 1049: /* swap screen & set/restore cursor as xterm */
                                if (!allowaltscreen)


@@ -1993,20 +1543,20 @@ tsetmode(bool priv, bool set, int *args, int narg) {
                                if (!allowaltscreen)
                                        break;
                                alt = IS_SET(MODE_ALTSCREEN);
                                if (!allowaltscreen)
                                        break;
                                alt = IS_SET(MODE_ALTSCREEN);

-                               if(alt) {
+                               if (alt) {

                                        tclearregion(0, 0, term.col-1,
                                                        term.row-1);
                                }
                                        tclearregion(0, 0, term.col-1,
                                                        term.row-1);
                                }

-                               if(set ^ alt) /* set is always 1 or 0 */
+                               if (set ^ alt) /* set is always 1 or 0 */

                                        tswapscreen();
                                        tswapscreen();

-                               if(*args != 1049)
+                               if (*args != 1049)

                                        break;
                                /* FALLTHROUGH */
                        case 1048:
                                tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
                                break;
                        case 2004: /* 2004: bracketed paste mode */
                                        break;
                                /* FALLTHROUGH */
                        case 1048:
                                tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
                                break;
                        case 2004: /* 2004: bracketed paste mode */

-                               MODBIT(term.mode, set, MODE_BRCKTPASTE);
+                               xsetmode(set, MODE_BRCKTPASTE);

                                break;
                        /* Not implemented mouse modes. See comments there. */
                        case 1001: /* mouse highlight mode; can hang the
                                break;
                        /* Not implemented mouse modes. See comments there. */
                        case 1001: /* mouse highlight mode; can hang the


@@ -2017,6 +1567,7 @@ tsetmode(bool priv, bool set, int *args, int narg) {
                        case 1015: /* urxvt mangled mouse mode; incompatible
                                      and can be mistaken for other control
                                      codes. */
                        case 1015: /* urxvt mangled mouse mode; incompatible
                                      and can be mistaken for other control
                                      codes. */

+                               break;

                        default:
                                fprintf(stderr,
                                        "erresc: unknown private set/reset mode %d\n",
                        default:
                                fprintf(stderr,
                                        "erresc: unknown private set/reset mode %d\n",


@@ -2024,11 +1575,11 @@ tsetmode(bool priv, bool set, int *args, int narg) {
                                break;
                        }
                } else {
                                break;
                        }
                } else {

-                       switch(*args) {
+                       switch (*args) {

                        case 0:  /* Error (IGNORED) */
                                break;
                        case 0:  /* Error (IGNORED) */
                                break;

-                       case 2:  /* KAM -- keyboard action */
-                               MODBIT(term.mode, set, MODE_KBDLOCK);
+                       case 2:
+                               xsetmode(set, MODE_KBDLOCK);

                                break;
                        case 4:  /* IRM -- Insertion-replacement */
                                MODBIT(term.mode, set, MODE_INSERT);
                                break;
                        case 4:  /* IRM -- Insertion-replacement */
                                MODBIT(term.mode, set, MODE_INSERT);


@@ -2050,11 +1601,12 @@ tsetmode(bool priv, bool set, int *args, int narg) {
 }
 
 void
 }
 
 void

-csihandle(void) {
+csihandle(void)
+{

        char buf[40];
        int len;
 
        char buf[40];
        int len;
 

-       switch(csiescseq.mode[0]) {
+       switch (csiescseq.mode[0]) {

        default:
        unknown:
                fprintf(stderr, "erresc: unknown csi ");
        default:
        unknown:
                fprintf(stderr, "erresc: unknown csi ");


@@ -2075,7 +1627,7 @@ csihandle(void) {
                tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
                break;
        case 'i': /* MC -- Media Copy */
                tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
                break;
        case 'i': /* MC -- Media Copy */

-               switch(csiescseq.arg[0]) {
+               switch (csiescseq.arg[0]) {

                case 0:
                        tdump();
                        break;
                case 0:
                        tdump();
                        break;


@@ -2094,8 +1646,14 @@ csihandle(void) {
                }
                break;
        case 'c': /* DA -- Device Attributes */
                }
                break;
        case 'c': /* DA -- Device Attributes */

-               if(csiescseq.arg[0] == 0)
-                       ttywrite(vtiden, sizeof(vtiden) - 1);
+               if (csiescseq.arg[0] == 0)
+                       ttywrite(vtiden, strlen(vtiden), 0);
+               break;
+       case 'b': /* REP -- if last char is printable print it <n> more times */
+               DEFAULT(csiescseq.arg[0], 1);
+               if (term.lastc)
+                       while (csiescseq.arg[0]-- > 0)
+                               tputc(term.lastc);

                break;
        case 'C': /* CUF -- Cursor <n> Forward */
        case 'a': /* HPR -- Cursor <n> Forward */
                break;
        case 'C': /* CUF -- Cursor <n> Forward */
        case 'a': /* HPR -- Cursor <n> Forward */


@@ -2115,7 +1673,7 @@ csihandle(void) {
                tmoveto(0, term.c.y-csiescseq.arg[0]);
                break;
        case 'g': /* TBC -- Tabulation clear */
                tmoveto(0, term.c.y-csiescseq.arg[0]);
                break;
        case 'g': /* TBC -- Tabulation clear */

-               switch(csiescseq.arg[0]) {
+               switch (csiescseq.arg[0]) {

                case 0: /* clear current tab stop */
                        term.tabs[term.c.x] = 0;
                        break;
                case 0: /* clear current tab stop */
                        term.tabs[term.c.x] = 0;
                        break;


@@ -2142,17 +1700,16 @@ csihandle(void) {
                tputtab(csiescseq.arg[0]);
                break;
        case 'J': /* ED -- Clear screen */
                tputtab(csiescseq.arg[0]);
                break;
        case 'J': /* ED -- Clear screen */

-               selclear(NULL);
-               switch(csiescseq.arg[0]) {
+               switch (csiescseq.arg[0]) {

                case 0: /* below */
                        tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
                case 0: /* below */
                        tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);

-                       if(term.c.y < term.row-1) {
+                       if (term.c.y < term.row-1) {

                                tclearregion(0, term.c.y+1, term.col-1,
                                                term.row-1);
                        }
                        break;
                case 1: /* above */
                                tclearregion(0, term.c.y+1, term.col-1,
                                                term.row-1);
                        }
                        break;
                case 1: /* above */

-                       if(term.c.y > 1)
+                       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;
                                tclearregion(0, 0, term.col-1, term.c.y-1);
                        tclearregion(0, term.c.y, term.c.x, term.c.y);
                        break;


@@ -2164,7 +1721,7 @@ csihandle(void) {
                }
                break;
        case 'K': /* EL -- Clear line */
                }
                break;
        case 'K': /* EL -- Clear line */

-               switch(csiescseq.arg[0]) {
+               switch (csiescseq.arg[0]) {

                case 0: /* right */
                        tclearregion(term.c.x, term.c.y, term.col-1,
                                        term.c.y);
                case 0: /* right */
                        tclearregion(term.c.x, term.c.y, term.col-1,
                                        term.c.y);


@@ -2221,13 +1778,13 @@ csihandle(void) {
                break;
        case 'n': /* DSR – Device Status Report (cursor position) */
                if (csiescseq.arg[0] == 6) {
                break;
        case 'n': /* DSR – Device Status Report (cursor position) */
                if (csiescseq.arg[0] == 6) {

-                       len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
+                       len = snprintf(buf, sizeof(buf), "\033[%i;%iR",

                                        term.c.y+1, term.c.x+1);
                                        term.c.y+1, term.c.x+1);

-                       ttywrite(buf, len);
+                       ttywrite(buf, len, 0);

                }
                break;
        case 'r': /* DECSTBM -- Set Scrolling Region */
                }
                break;
        case 'r': /* DECSTBM -- Set Scrolling Region */

-               if(csiescseq.priv) {
+               if (csiescseq.priv) {

                        goto unknown;
                } else {
                        DEFAULT(csiescseq.arg[0], 1);
                        goto unknown;
                } else {
                        DEFAULT(csiescseq.arg[0], 1);


@@ -2244,75 +1801,175 @@ csihandle(void) {
                break;
        case ' ':
                switch (csiescseq.mode[1]) {
                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:
+               case 'q': /* DECSCUSR -- Set Cursor Style */
+                       if (xsetcursor(csiescseq.arg[0]))

                                goto unknown;
                                goto unknown;

+                       break;
+               default:
+                       goto unknown;

                }
                break;
        }
 }
 
 void
                }
                break;
        }
 }
 
 void

-csidump(void) {
-       int i;
+csidump(void)
+{
+       size_t i;

        uint c;
 
        uint c;
 

-       printf("ESC[");
-       for(i = 0; i < csiescseq.len; i++) {
+       fprintf(stderr, "ESC[");
+       for (i = 0; i < csiescseq.len; i++) {

                c = csiescseq.buf[i] & 0xff;
                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)");
+               if (isprint(c)) {
+                       putc(c, stderr);
+               } else if (c == '\n') {
+                       fprintf(stderr, "(\\n)");
+               } else if (c == '\r') {
+                       fprintf(stderr, "(\\r)");
+               } else if (c == 0x1b) {
+                       fprintf(stderr, "(\\e)");

                } else {
                } else {

-                       printf("(%02x)", c);
+                       fprintf(stderr, "(%02x)", c);

                }
        }
                }
        }

-       putchar('\n');
+       putc('\n', stderr);

 }
 
 void
 }
 
 void

-csireset(void) {
+csireset(void)
+{

        memset(&csiescseq, 0, sizeof(csiescseq));
 }
 
 void
        memset(&csiescseq, 0, sizeof(csiescseq));
 }
 
 void

-strhandle(void) {
-       char *p = NULL;
+osc4_color_response(int num)
+{
+       int n;
+       char buf[32];
+       unsigned char r, g, b;
+
+       if (xgetcolor(num, &r, &g, &b)) {
+               fprintf(stderr, "erresc: failed to fetch osc4 color %d\n", num);
+               return;
+       }
+
+       n = snprintf(buf, sizeof buf, "\033]4;%d;rgb:%02x%02x/%02x%02x/%02x%02x\007",
+                    num, r, r, g, g, b, b);
+
+       ttywrite(buf, n, 1);
+}
+
+void
+osc_color_response(int index, int num)
+{
+       int n;
+       char buf[32];
+       unsigned char r, g, b;
+
+       if (xgetcolor(index, &r, &g, &b)) {
+               fprintf(stderr, "erresc: failed to fetch osc color %d\n", index);
+               return;
+       }
+
+       n = snprintf(buf, sizeof buf, "\033]%d;rgb:%02x%02x/%02x%02x/%02x%02x\007",
+                    num, r, r, g, g, b, b);
+
+       ttywrite(buf, n, 1);
+}
+
+void
+strhandle(void)
+{
+       char *p = NULL, *dec;

        int j, narg, par;
 
        term.esc &= ~(ESC_STR_END|ESC_STR);
        strparse();
        par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
 
        int j, narg, par;
 
        term.esc &= ~(ESC_STR_END|ESC_STR);
        strparse();
        par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
 

-       switch(strescseq.type) {
+       switch (strescseq.type) {

        case ']': /* OSC -- Operating System Command */
        case ']': /* OSC -- Operating System Command */

-               switch(par) {
+               switch (par) {

                case 0:
                case 0:

+                       if (narg > 1) {
+                               xsettitle(strescseq.args[1]);
+                               xseticontitle(strescseq.args[1]);
+                       }
+                       return;

                case 1:
                case 1:

+                       if (narg > 1)
+                               xseticontitle(strescseq.args[1]);
+                       return;

                case 2:
                case 2:

-                       if(narg > 1)
+                       if (narg > 1)

                                xsettitle(strescseq.args[1]);
                        return;
                                xsettitle(strescseq.args[1]);
                        return;

+               case 52:
+                       if (narg > 2 && allowwindowops) {
+                               dec = base64dec(strescseq.args[2]);
+                               if (dec) {
+                                       xsetsel(dec);
+                                       xclipcopy();
+                               } else {
+                                       fprintf(stderr, "erresc: invalid base64\n");
+                               }
+                       }
+                       return;
+               case 10:
+                       if (narg < 2)
+                               break;
+
+                       p = strescseq.args[1];
+
+                       if (!strcmp(p, "?"))
+                               osc_color_response(defaultfg, 10);
+                       else if (xsetcolorname(defaultfg, p))
+                               fprintf(stderr, "erresc: invalid foreground color: %s\n", p);
+                       else
+                               redraw();
+                       return;
+               case 11:
+                       if (narg < 2)
+                               break;
+
+                       p = strescseq.args[1];
+
+                       if (!strcmp(p, "?"))
+                               osc_color_response(defaultbg, 11);
+                       else if (xsetcolorname(defaultbg, p))
+                               fprintf(stderr, "erresc: invalid background color: %s\n", p);
+                       else
+                               redraw();
+                       return;
+               case 12:
+                       if (narg < 2)
+                               break;
+
+                       p = strescseq.args[1];
+
+                       if (!strcmp(p, "?"))
+                               osc_color_response(defaultcs, 12);
+                       else if (xsetcolorname(defaultcs, p))
+                               fprintf(stderr, "erresc: invalid cursor color: %s\n", p);
+                       else
+                               redraw();
+                       return;

                case 4: /* color set */
                case 4: /* color set */

-                       if(narg < 3)
+                       if (narg < 3)

                                break;
                        p = strescseq.args[2];
                        /* FALLTHROUGH */
                case 104: /* color reset, here p = NULL */
                        j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
                                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);
+
+                       if (!strcmp(p, "?"))
+                               osc4_color_response(j);
+                       else if (xsetcolorname(j, p)) {
+                               if (par == 104 && narg <= 1)
+                                       return; /* color reset without parameter */
+                               fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
+                                       j, p ? p : "(null)");

                        } else {
                                /*
                                 * TODO if defaultbg color is changed, borders
                        } else {
                                /*
                                 * TODO if defaultbg color is changed, borders


@@ -2337,151 +1994,167 @@ strhandle(void) {
 }
 
 void
 }
 
 void

-strparse(void) {
+strparse(void)
+{

        int c;
        char *p = strescseq.buf;
 
        strescseq.narg = 0;
        strescseq.buf[strescseq.len] = '\0';
 
        int c;
        char *p = strescseq.buf;
 
        strescseq.narg = 0;
        strescseq.buf[strescseq.len] = '\0';
 

-       if(*p == '\0')
+       if (*p == '\0')

                return;
 
                return;
 

-       while(strescseq.narg < STR_ARG_SIZ) {
+       while (strescseq.narg < STR_ARG_SIZ) {

                strescseq.args[strescseq.narg++] = p;
                strescseq.args[strescseq.narg++] = p;

-               while((c = *p) != ';' && c != '\0')
+               while ((c = *p) != ';' && c != '\0')

                        ++p;
                        ++p;

-               if(c == '\0')
+               if (c == '\0')

                        return;
                *p++ = '\0';
        }
 }
 
 void
                        return;
                *p++ = '\0';
        }
 }
 
 void

-strdump(void) {
-       int i;
+strdump(void)
+{
+       size_t i;

        uint c;
 
        uint c;
 

-       printf("ESC%c", strescseq.type);
-       for(i = 0; i < strescseq.len; i++) {
+       fprintf(stderr, "ESC%c", strescseq.type);
+       for (i = 0; i < strescseq.len; i++) {

                c = strescseq.buf[i] & 0xff;
                c = strescseq.buf[i] & 0xff;

-               if(c == '\0') {
+               if (c == '\0') {
+                       putc('\n', stderr);

                        return;
                        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 if (isprint(c)) {
+                       putc(c, stderr);
+               } else if (c == '\n') {
+                       fprintf(stderr, "(\\n)");
+               } else if (c == '\r') {
+                       fprintf(stderr, "(\\r)");
+               } else if (c == 0x1b) {
+                       fprintf(stderr, "(\\e)");

                } else {
                } else {

-                       printf("(%02x)", c);
+                       fprintf(stderr, "(%02x)", c);

                }
        }
                }
        }

-       printf("ESC\\\n");
+       fprintf(stderr, "ESC\\\n");
+}
+
+void
+strreset(void)
+{
+       strescseq = (STREscape){
+               .buf = xrealloc(strescseq.buf, STR_BUF_SIZ),
+               .siz = STR_BUF_SIZ,
+       };

 }
 
 void
 }
 
 void

-strreset(void) {
-       memset(&strescseq, 0, sizeof(strescseq));
+sendbreak(const Arg *arg)
+{
+       if (tcsendbreak(cmdfd, 0))
+               perror("Error sending break");

 }
 
 void
 }
 
 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));
+tprinter(char *s, size_t len)
+{
+       if (iofd != -1 && xwrite(iofd, s, len) < 0) {
+               perror("Error writing to output file");

                close(iofd);
                iofd = -1;
        }
 }
 
 void
                close(iofd);
                iofd = -1;
        }
 }
 
 void

-toggleprinter(const Arg *arg) {
+toggleprinter(const Arg *arg)
+{

        term.mode ^= MODE_PRINT;
 }
 
 void
        term.mode ^= MODE_PRINT;
 }
 
 void

-printscreen(const Arg *arg) {
+printscreen(const Arg *arg)
+{

        tdump();
 }
 
 void
        tdump();
 }
 
 void

-printsel(const Arg *arg) {
+printsel(const Arg *arg)
+{

        tdumpsel();
 }
 
 void
        tdumpsel();
 }
 
 void

-tdumpsel(void) {
+tdumpsel(void)
+{

        char *ptr;
 
        char *ptr;
 

-       if((ptr = getsel())) {
+       if ((ptr = getsel())) {

                tprinter(ptr, strlen(ptr));
                free(ptr);
        }
 }
 
 void
                tprinter(ptr, strlen(ptr));
                free(ptr);
        }
 }
 
 void

-tdumpline(int n) {
+tdumpline(int n)
+{

        char buf[UTF_SIZ];
        char buf[UTF_SIZ];

-       Glyph *bp, *end;
+       const Glyph *bp, *end;

 
        bp = &term.line[n][0];
        end = &bp[MIN(tlinelen(n), term.col) - 1];
 
        bp = &term.line[n][0];
        end = &bp[MIN(tlinelen(n), term.col) - 1];

-       if(bp != end || bp->u != ' ') {
-               for( ;bp <= end; ++bp)
+       if (bp != end || bp->u != ' ') {
+               for ( ; bp <= end; ++bp)

                        tprinter(buf, utf8encode(bp->u, buf));
        }
        tprinter("\n", 1);
 }
 
 void
                        tprinter(buf, utf8encode(bp->u, buf));
        }
        tprinter("\n", 1);
 }
 
 void

-tdump(void) {
+tdump(void)
+{

        int i;
 
        int i;
 

-       for(i = 0; i < term.row; ++i)
+       for (i = 0; i < term.row; ++i)

                tdumpline(i);
 }
 
 void
                tdumpline(i);
 }
 
 void

-tputtab(int n) {
+tputtab(int n)
+{

        uint x = term.c.x;
 
        uint x = term.c.x;
 

-       if(n > 0) {
-               while(x < term.col && n--)
-                       for(++x; x < term.col && !term.tabs[x]; ++x)
+       if (n > 0) {
+               while (x < term.col && n--)
+                       for (++x; x < term.col && !term.tabs[x]; ++x)

                                /* nothing */ ;
                                /* nothing */ ;

-       } else if(n < 0) {
-               while(x > 0 && n++)
-                       for(--x; x > 0 && !term.tabs[x]; --x)
+       } 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
                                /* 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);
+tdefutf8(char ascii)
+{
+       if (ascii == 'G')
+               term.mode |= MODE_UTF8;
+       else if (ascii == '@')
+               term.mode &= ~MODE_UTF8;

 }
 
 void
 }
 
 void

-tdeftran(char ascii) {
+tdeftran(char ascii)
+{

        static char cs[] = "0B";
        static int vcs[] = {CS_GRAPHIC0, CS_USA};
        char *p;
 
        static char cs[] = "0B";
        static int vcs[] = {CS_GRAPHIC0, CS_USA};
        char *p;
 

-       if((p = strchr(cs, ascii)) == NULL) {
+       if ((p = strchr(cs, ascii)) == NULL) {

                fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
        } else {
                term.trantbl[term.icharset] = vcs[p - cs];
                fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
        } else {
                term.trantbl[term.icharset] = vcs[p - cs];


@@ -2489,19 +2162,21 @@ tdeftran(char ascii) {
 }
 
 void
 }
 
 void

-tdectest(char c) {
+tdectest(char c)
+{

        int x, y;
 
        int x, y;
 

-       if(c == '8') { /* DEC screen alignment test. */
-               for(x = 0; x < term.col; ++x) {
-                       for(y = 0; y < term.row; ++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
                                tsetchar('E', &term.c.attr, x, y);
                }
        }
 }
 
 void

-tstrsequence(uchar c) {
+tstrsequence(uchar c)
+{

        switch (c) {
        case 0x90:   /* DCS -- Device Control String */
                c = 'P';
        switch (c) {
        case 0x90:   /* DCS -- Device Control String */
                c = 'P';


@@ -2522,8 +2197,9 @@ tstrsequence(uchar c) {
 }
 
 void
 }
 
 void

-tcontrolcode(uchar ascii) {
-       switch(ascii) {
+tcontrolcode(uchar ascii)
+{
+       switch (ascii) {

        case '\t':   /* HT */
                tputtab(1);
                return;
        case '\t':   /* HT */
                tputtab(1);
                return;


@@ -2540,14 +2216,11 @@ tcontrolcode(uchar ascii) {
                tnewline(IS_SET(MODE_CRLF));
                return;
        case '\a':   /* BEL */
                tnewline(IS_SET(MODE_CRLF));
                return;
        case '\a':   /* BEL */

-               if(term.esc & ESC_STR_END) {
+               if (term.esc & ESC_STR_END) {

                        /* backwards compatibility to xterm */
                        strhandle();
                } else {
                        /* backwards compatibility to xterm */
                        strhandle();
                } else {

-                       if(!(xw.state & WIN_FOCUSED))
-                               xseturgency(1);
-                       if (bellvolume)
-                               XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
+                       xbell();

                }
                break;
        case '\033': /* ESC */
                }
                break;
        case '\033': /* ESC */


@@ -2561,6 +2234,7 @@ tcontrolcode(uchar ascii) {
                return;
        case '\032': /* SUB */
                tsetchar('?', &term.c.attr, term.c.x, term.c.y);
                return;
        case '\032': /* SUB */
                tsetchar('?', &term.c.attr, term.c.x, term.c.y);

+               /* FALLTHROUGH */

        case '\030': /* CAN */
                csireset();
                break;
        case '\030': /* CAN */
                csireset();
                break;


@@ -2570,29 +2244,48 @@ tcontrolcode(uchar ascii) {
        case '\023': /* XOFF (IGNORED) */
        case 0177:   /* DEL (IGNORED) */
                return;
        case '\023': /* XOFF (IGNORED) */
        case 0177:   /* DEL (IGNORED) */
                return;

+       case 0x80:   /* TODO: PAD */
+       case 0x81:   /* TODO: HOP */
+       case 0x82:   /* TODO: BPH */
+       case 0x83:   /* TODO: NBH */

        case 0x84:   /* TODO: IND */
                break;
        case 0x85:   /* NEL -- Next line */
                tnewline(1); /* always go to first col */
                break;
        case 0x84:   /* TODO: IND */
                break;
        case 0x85:   /* NEL -- Next line */
                tnewline(1); /* always go to first col */
                break;

+       case 0x86:   /* TODO: SSA */
+       case 0x87:   /* TODO: ESA */
+               break;

        case 0x88:   /* HTS -- Horizontal tab stop */
                term.tabs[term.c.x] = 1;
                break;
        case 0x88:   /* HTS -- Horizontal tab stop */
                term.tabs[term.c.x] = 1;
                break;

+       case 0x89:   /* TODO: HTJ */
+       case 0x8a:   /* TODO: VTS */
+       case 0x8b:   /* TODO: PLD */
+       case 0x8c:   /* TODO: PLU */

        case 0x8d:   /* TODO: RI */
        case 0x8e:   /* TODO: SS2 */
        case 0x8f:   /* TODO: SS3 */
        case 0x8d:   /* TODO: RI */
        case 0x8e:   /* TODO: SS2 */
        case 0x8f:   /* TODO: SS3 */

+       case 0x91:   /* TODO: PU1 */
+       case 0x92:   /* TODO: PU2 */
+       case 0x93:   /* TODO: STS */
+       case 0x94:   /* TODO: CCH */
+       case 0x95:   /* TODO: MW */
+       case 0x96:   /* TODO: SPA */
+       case 0x97:   /* TODO: EPA */

        case 0x98:   /* TODO: SOS */
        case 0x98:   /* TODO: SOS */

+       case 0x99:   /* TODO: SGCI */

                break;
        case 0x9a:   /* DECID -- Identify Terminal */
                break;
        case 0x9a:   /* DECID -- Identify Terminal */

-               ttywrite(vtiden, sizeof(vtiden) - 1);
+               ttywrite(vtiden, strlen(vtiden), 0);

                break;
        case 0x9b:   /* TODO: CSI */
        case 0x9c:   /* TODO: ST */
                break;
        case 0x90:   /* DCS -- Device Control String */
                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 */
        case 0x9d:   /* OSC -- Operating System Command */

+       case 0x9e:   /* PM -- Privacy Message */
+       case 0x9f:   /* APC -- Application Program Command */

                tstrsequence(ascii);
                return;
        }
                tstrsequence(ascii);
                return;
        }


@@ -2605,14 +2298,18 @@ tcontrolcode(uchar ascii) {
  * more characters for this sequence, otherwise 0
  */
 int
  * more characters for this sequence, otherwise 0
  */
 int

-eschandle(uchar ascii) {
-       switch(ascii) {
+eschandle(uchar ascii)
+{
+       switch (ascii) {

        case '[':
                term.esc |= ESC_CSI;
                return 0;
        case '#':
                term.esc |= ESC_TEST;
                return 0;
        case '[':
                term.esc |= ESC_CSI;
                return 0;
        case '#':
                term.esc |= ESC_TEST;
                return 0;

+       case '%':
+               term.esc |= ESC_UTF8;
+               return 0;

        case 'P': /* DCS -- Device Control String */
        case '_': /* APC -- Application Program Command */
        case '^': /* PM -- Privacy Message */
        case 'P': /* DCS -- Device Control String */
        case '_': /* APC -- Application Program Command */
        case '^': /* PM -- Privacy Message */


@@ -2632,7 +2329,7 @@ eschandle(uchar ascii) {
                term.esc |= ESC_ALTCHARSET;
                return 0;
        case 'D': /* IND -- Linefeed */
                term.esc |= ESC_ALTCHARSET;
                return 0;
        case 'D': /* IND -- Linefeed */

-               if(term.c.y == term.bot) {
+               if (term.c.y == term.bot) {

                        tscrollup(term.top, 1);
                } else {
                        tmoveto(term.c.x, term.c.y+1);
                        tscrollup(term.top, 1);
                } else {
                        tmoveto(term.c.x, term.c.y+1);


@@ -2645,25 +2342,25 @@ eschandle(uchar ascii) {
                term.tabs[term.c.x] = 1;
                break;
        case 'M': /* RI -- Reverse index */
                term.tabs[term.c.x] = 1;
                break;
        case 'M': /* RI -- Reverse index */

-               if(term.c.y == term.top) {
+               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 */
                        tscrolldown(term.top, 1);
                } else {
                        tmoveto(term.c.x, term.c.y-1);
                }
                break;
        case 'Z': /* DECID -- Identify Terminal */

-               ttywrite(vtiden, sizeof(vtiden) - 1);
+               ttywrite(vtiden, strlen(vtiden), 0);

                break;
                break;

-       case 'c': /* RIS -- Reset to inital state */
+       case 'c': /* RIS -- Reset to initial state */

                treset();
                treset();

-               xresettitle();
+               resettitle();

                xloadcols();
                break;
        case '=': /* DECPAM -- Application keypad */
                xloadcols();
                break;
        case '=': /* DECPAM -- Application keypad */

-               term.mode |= MODE_APPKEYPAD;
+               xsetmode(1, MODE_APPKEYPAD);

                break;
        case '>': /* DECPNM -- Normal keypad */
                break;
        case '>': /* DECPNM -- Normal keypad */

-               term.mode &= ~MODE_APPKEYPAD;
+               xsetmode(0, MODE_APPKEYPAD);

                break;
        case '7': /* DECSC -- Save Cursor */
                tcursor(CURSOR_SAVE);
                break;
        case '7': /* DECSC -- Save Cursor */
                tcursor(CURSOR_SAVE);


@@ -2672,7 +2369,7 @@ eschandle(uchar ascii) {
                tcursor(CURSOR_LOAD);
                break;
        case '\\': /* ST -- String Terminator */
                tcursor(CURSOR_LOAD);
                break;
        case '\\': /* ST -- String Terminator */

-               if(term.esc & ESC_STR_END)
+               if (term.esc & ESC_STR_END)

                        strhandle();
                break;
        default:
                        strhandle();
                break;
        default:


@@ -2684,21 +2381,25 @@ eschandle(uchar ascii) {
 }
 
 void
 }
 
 void

-tputc(Rune u) {
+tputc(Rune u)
+{

        char c[UTF_SIZ];
        char c[UTF_SIZ];

-       bool control;
+       int control;

        int width, len;
        Glyph *gp;
 
        int width, len;
        Glyph *gp;
 

-       len = utf8encode(u, c);
-       if((width = wcwidth(u)) == -1) {
-               memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
-               width = 1;
+       control = ISCONTROL(u);
+       if (u < 127 || !IS_SET(MODE_UTF8)) {
+               c[0] = u;
+               width = len = 1;
+       } else {
+               len = utf8encode(u, c);
+               if (!control && (width = wcwidth(u)) == -1)
+                       width = 1;

        }
 
        }
 

-       if(IS_SET(MODE_PRINT))
+       if (IS_SET(MODE_PRINT))

                tprinter(c, len);
                tprinter(c, len);

-       control = ISCONTROL(u);

 
        /*
         * STR sequence must be checked before anything else
 
        /*
         * STR sequence must be checked before anything else


@@ -2706,48 +2407,57 @@ tputc(Rune u) {
         * receives a ESC, a SUB, a ST or any other C1 control
         * character.
         */
         * 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 ||
+       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;
                   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;
+                       goto check_control_code;

                }
                }

+
+               if (strescseq.len+len >= strescseq.siz) {
+                       /*
+                        * 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();
+                        */
+                       if (strescseq.siz > (SIZE_MAX - UTF_SIZ) / 2)
+                               return;
+                       strescseq.siz *= 2;
+                       strescseq.buf = xrealloc(strescseq.buf, strescseq.siz);
+               }
+
+               memmove(&strescseq.buf[strescseq.len], c, len);
+               strescseq.len += len;
+               return;

        }
 
        }
 

+check_control_code:

        /*
         * 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.
         */
        /*
         * 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) {
+       if (control) {

                tcontrolcode(u);
                /*
                 * control codes are not shown ever
                 */
                tcontrolcode(u);
                /*
                 * control codes are not shown ever
                 */

+               if (!term.esc)
+                       term.lastc = 0;

                return;
                return;

-       } else if(term.esc & ESC_START) {
-               if(term.esc & ESC_CSI) {
+       } else if (term.esc & ESC_START) {
+               if (term.esc & ESC_CSI) {

                        csiescseq.buf[csiescseq.len++] = u;
                        csiescseq.buf[csiescseq.len++] = u;

-                       if(BETWEEN(u, 0x40, 0x7E)
+                       if (BETWEEN(u, 0x40, 0x7E)

                                        || csiescseq.len >= \
                                        sizeof(csiescseq.buf)-1) {
                                term.esc = 0;
                                        || csiescseq.len >= \
                                        sizeof(csiescseq.buf)-1) {
                                term.esc = 0;


@@ -2755,9 +2465,11 @@ tputc(Rune u) {
                                csihandle();
                        }
                        return;
                                csihandle();
                        }
                        return;

-               } else if(term.esc & ESC_ALTCHARSET) {
+               } else if (term.esc & ESC_UTF8) {
+                       tdefutf8(u);
+               } else if (term.esc & ESC_ALTCHARSET) {

                        tdeftran(u);
                        tdeftran(u);

-               } else if(term.esc & ESC_TEST) {
+               } else if (term.esc & ESC_TEST) {

                        tdectest(u);
                } else {
                        if (!eschandle(u))
                        tdectest(u);
                } else {
                        if (!eschandle(u))


@@ -2771,49 +2483,83 @@ tputc(Rune u) {
                 */
                return;
        }
                 */
                return;
        }

-       if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
-               selclear(NULL);
+       if (selected(term.c.x, term.c.y))
+               selclear();

 
        gp = &term.line[term.c.y][term.c.x];
 
        gp = &term.line[term.c.y][term.c.x];

-       if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
+       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];
        }
 
                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)
+       if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)

                memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
 
                memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
 

-       if(term.c.x+width > term.col) {
+       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);
                tnewline(1);
                gp = &term.line[term.c.y][term.c.x];
        }
 
        tsetchar(u, &term.c.attr, term.c.x, term.c.y);

+       term.lastc = u;

 
 

-       if(width == 2) {
+       if (width == 2) {

                gp->mode |= ATTR_WIDE;
                gp->mode |= ATTR_WIDE;

-               if(term.c.x+1 < term.col) {
+               if (term.c.x+1 < term.col) {

                        gp[1].u = '\0';
                        gp[1].mode = ATTR_WDUMMY;
                }
        }
                        gp[1].u = '\0';
                        gp[1].mode = ATTR_WDUMMY;
                }
        }

-       if(term.c.x+width < term.col) {
+       if (term.c.x+width < term.col) {

                tmoveto(term.c.x+width, term.c.y);
        } else {
                term.c.state |= CURSOR_WRAPNEXT;
        }
 }
 
                tmoveto(term.c.x+width, term.c.y);
        } else {
                term.c.state |= CURSOR_WRAPNEXT;
        }
 }
 

+int
+twrite(const char *buf, int buflen, int show_ctrl)
+{
+       int charsize;
+       Rune u;
+       int n;
+
+       for (n = 0; n < buflen; n += charsize) {
+               if (IS_SET(MODE_UTF8)) {
+                       /* process a complete utf8 char */
+                       charsize = utf8decode(buf + n, &u, buflen - n);
+                       if (charsize == 0)
+                               break;
+               } else {
+                       u = buf[n] & 0xFF;
+                       charsize = 1;
+               }
+               if (show_ctrl && ISCONTROL(u)) {
+                       if (u & 0x80) {
+                               u &= 0x7f;
+                               tputc('^');
+                               tputc('[');
+                       } else if (u != '\n' && u != '\r' && u != '\t') {
+                               u ^= 0x40;
+                               tputc('^');
+                       }
+               }
+               tputc(u);
+       }
+       return n;
+}
+

 void
 void

-tresize(int col, int row) {
+tresize(int col, int row)
+{

        int i;
        int minrow = MIN(row, term.row);
        int mincol = MIN(col, term.col);
        int i;
        int minrow = MIN(row, term.row);
        int mincol = MIN(col, term.col);

-       bool *bp;
+       int *bp;

        TCursor c;
 
        TCursor c;
 

-       if(col < 1 || row < 1) {
+       if (col < 1 || row < 1) {

                fprintf(stderr,
                        "tresize: error resizing to %dx%d\n", col, row);
                return;
                fprintf(stderr,
                        "tresize: error resizing to %dx%d\n", col, row);
                return;


@@ -2824,7 +2570,7 @@ tresize(int col, int row) {
         * tscrollup would work here, but we can optimize to
         * memmove because we're freeing the earlier lines
         */
         * 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++) {
+       for (i = 0; i <= term.c.y - row; i++) {

                free(term.line[i]);
                free(term.alt[i]);
        }
                free(term.line[i]);
                free(term.alt[i]);
        }


@@ -2833,14 +2579,11 @@ tresize(int col, int row) {
                memmove(term.line, term.line + i, row * sizeof(Line));
                memmove(term.alt, term.alt + i, row * sizeof(Line));
        }
                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++) {
+       for (i += row; i < term.row; i++) {

                free(term.line[i]);
                free(term.alt[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));
        /* resize to new height */
        term.line = xrealloc(term.line, row * sizeof(Line));
        term.alt  = xrealloc(term.alt,  row * sizeof(Line));


@@ -2848,23 +2591,23 @@ tresize(int col, int row) {
        term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
 
        /* resize each row to new width, zero-pad if needed */
        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++) {
+       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 */
                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++) {
+       for (/* i = minrow */; i < row; i++) {

                term.line[i] = xmalloc(col * sizeof(Glyph));
                term.alt[i] = xmalloc(col * sizeof(Glyph));
        }
                term.line[i] = xmalloc(col * sizeof(Glyph));
                term.alt[i] = xmalloc(col * sizeof(Glyph));
        }

-       if(col > term.col) {
+       if (col > term.col) {

                bp = term.tabs + term.col;
 
                memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
                bp = term.tabs + term.col;
 
                memset(bp, 0, sizeof(*term.tabs) * (col - term.col));

-               while(--bp > term.tabs && !*bp)
+               while (--bp > term.tabs && !*bp)

                        /* nothing */ ;
                        /* nothing */ ;

-               for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
+               for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)

                        *bp = 1;
        }
        /* update terminal size */
                        *bp = 1;
        }
        /* update terminal size */


@@ -2876,11 +2619,11 @@ tresize(int col, int row) {
        tmoveto(term.c.x, term.c.y);
        /* Clearing both screens (it makes dirty all lines) */
        c = term.c;
        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) {
+       for (i = 0; i < 2; i++) {
+               if (mincol < col && 0 < minrow) {

                        tclearregion(mincol, 0, col - 1, minrow - 1);
                }
                        tclearregion(mincol, 0, col - 1, minrow - 1);
                }

-               if(0 < col && minrow < row) {
+               if (0 < col && minrow < row) {

                        tclearregion(0, minrow, col - 1, row - 1);
                }
                tswapscreen();
                        tclearregion(0, minrow, col - 1, row - 1);
                }
                tswapscreen();


@@ -2890,1187 +2633,54 @@ tresize(int col, int row) {
 }
 
 void
 }
 
 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;
-}
-
-bool
-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 bool loaded;
-       Color *cp;
-
-       if(loaded) {
-               for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
-                       XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
-       }
-
-       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 = true;
-}
-
-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 == True) {
-               sizeh->flags |= PMaxSize | PMinSize;
-               sizeh->min_width = sizeh->max_width = xw.w;
-               sizeh->min_height = sizeh->max_height = xw.h;
-       }
-       if(xw.gm & (XValue|YValue)) {
-               sizeh->flags |= USPosition | PWinGravity;
-               sizeh->x = xw.l;
-               sizeh->y = xw.t;
-               sizeh->win_gravity = xgeommasktogravity(xw.gm);
-       }
-
-       XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
-                       &class);
-       XFree(sizeh);
-}
-
-int
-xgeommasktogravity(int mask) {
-       switch(mask & (XNegative|YNegative)) {
-       case 0:
-               return NorthWestGravity;
-       case XNegative:
-               return NorthEastGravity;
-       case YNegative:
-               return SouthWestGravity;
-       }
-       return SouthEastGravity;
-}
-
-int
-xloadfont(Font *f, FcPattern *pattern) {
-       FcPattern *match;
-       FcResult result;
-
-       match = FcFontMatch(NULL, pattern, &result);
-       if(!match)
-               return 1;
-
-       if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
-               FcPatternDestroy(match);
-               return 1;
-       }
-
-       f->set = NULL;
-       f->pattern = FcPatternDuplicate(pattern);
-
-       f->ascent = f->match->ascent;
-       f->descent = f->match->descent;
-       f->lbearing = 0;
-       f->rbearing = f->match->max_advance_width;
-
-       f->height = f->ascent + f->descent;
-       f->width = f->lbearing + f->rbearing;
-
-       return 0;
-}
-
-void
-xloadfonts(char *fontstr, double fontsize) {
-       FcPattern *pattern;
-       FcResult r_sz, r_psz;
-       double fontval;
-       float ceilf(float);
-
-       if(fontstr[0] == '-') {
-               pattern = XftXlfdParse(fontstr, False, False);
-       } else {
-               pattern = FcNameParse((FcChar8 *)fontstr);
-       }
-
-       if(!pattern)
-               die("st: can't open font %s\n", fontstr);
-
-       if(fontsize > 1) {
-               FcPatternDel(pattern, FC_PIXEL_SIZE);
-               FcPatternDel(pattern, FC_SIZE);
-               FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
-               usedfontsize = fontsize;
-       } else {
-               r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
-               r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
-               if(r_psz == FcResultMatch) {
-                       usedfontsize = fontval;
-               } else if(r_sz == FcResultMatch) {
-                       usedfontsize = -1;
-               } else {
-                       /*
-                        * Default font size is 12, if none given. This is to
-                        * have a known usedfontsize value.
-                        */
-                       FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
-                       usedfontsize = 12;
-               }
-               defaultfontsize = usedfontsize;
-       }
-
-       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;
-       }
-
-       /* 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
-xunloadfont(Font *f) {
-       XftFontClose(xw.dpy, f->match);
-       FcPatternDestroy(f->pattern);
-       if(f->set)
-               FcFontSetDestroy(f->set);
-}
-
-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);
-}
-
-void
-xzoom(const Arg *arg) {
-       Arg larg;
-
-       larg.i = usedfontsize + arg->i;
-       xzoomabs(&larg);
-}
-
-void
-xzoomabs(const Arg *arg) {
-       xunloadfonts();
-       xloadfonts(usedfont, arg->i);
-       cresize(0, 0);
-       redraw();
-       xhints();
-}
-
-void
-xzoomreset(const Arg *arg) {
-       Arg larg;
-
-       if(defaultfontsize > 0) {
-               larg.i = defaultfontsize;
-               xzoomabs(&larg);
-       }
+resettitle(void)
+{
+       xsettitle(NULL);

 }
 
 void
 }
 
 void

-xinit(void) {
-       XGCValues gcvalues;
-       Cursor cursor;
-       Window parent;
-       pid_t thispid = getpid();
-
-       if(!(xw.dpy = XOpenDisplay(NULL)))
-               die("Can't open display\n");
-       xw.scr = XDefaultScreen(xw.dpy);
-       xw.vis = XDefaultVisual(xw.dpy, xw.scr);
-
-       /* font */
-       if(!FcInit())
-               die("Could not init fontconfig.\n");
-
-       usedfont = (opt_font == NULL)? font : opt_font;
-       xloadfonts(usedfont, 0);
-
-       /* colors */
-       xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
-       xloadcols();
-
-       /* adjust fixed window geometry */
-       xw.w = 2 * borderpx + term.col * xw.cw;
-       xw.h = 2 * borderpx + term.row * xw.ch;
-       if(xw.gm & XNegative)
-               xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
-       if(xw.gm & YNegative)
-               xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
-
-       /* Events */
-       xw.attrs.background_pixel = dc.col[defaultbg].pixel;
-       xw.attrs.border_pixel = dc.col[defaultbg].pixel;
-       xw.attrs.bit_gravity = NorthWestGravity;
-       xw.attrs.event_mask = FocusChangeMask | KeyPressMask
-               | ExposureMask | VisibilityChangeMask | StructureNotifyMask
-               | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
-       xw.attrs.colormap = xw.cmap;
-
-       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 */
-       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);
-       if(xw.xic == NULL)
-               die("XCreateIC failed. Could not obtain input method.\n");
-
-       /* white cursor, black outline */
-       cursor = XCreateFontCursor(xw.dpy, XC_xterm);
-       XDefineCursor(xw.dpy, xw.win, cursor);
-       XRecolorCursor(xw.dpy, cursor,
-               &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
-               &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
-
-       xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
-       xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
-       xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
-       XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
-
-       xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
-       XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
-                       PropModeReplace, (uchar *)&thispid, 1);
-
-       xresettitle();
-       XMapWindow(xw.dpy, xw.win);
-       xhints();
-       XSync(xw.dpy, False);
-}
-
-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;
-               }
+drawregion(int x1, int y1, int x2, int y2)
+{
+       int y;

 
 

-               /* 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++;
+       for (y = y1; y < y2; y++) {
+               if (!term.dirty[y])

                        continue;
                        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,
-                                                      FcTrue, 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,
-                                       FcTrue);
-
-                       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
-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(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];
-       }
-
-       /* 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);
-       }

 
 

-       if(base.mode & ATTR_STRUCK) {
-               XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
-                               width, 1);
+               term.dirty[y] = 0;
+               xdrawline(term.line[y], x1, y, x2);

        }
        }

-
-       /* 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, oldy = 0;
-       int curx;
-       Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs};
-
-       LIMIT(oldx, 0, term.col-1);
-       LIMIT(oldy, 0, term.row-1);
-
-       curx = term.c.x;
-
-       /* adjust position if in dummy */
-       if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
-               oldx--;
-       if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
-               curx--;
-
-       g.u = term.line[term.c.y][term.c.x].u;
-
-       /* remove the old cursor */
-       xdrawglyph(term.line[oldy][oldx], oldx, oldy);
+draw(void)
+{
+       int cx = term.c.x, ocx = term.ocx, ocy = term.ocy;

 
 

-       if(IS_SET(MODE_HIDE))
+       if (!xstartdraw())

                return;
 
                return;
 

-       /* draw the new one */
-       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;
-}
-
+       /* adjust cursor position */
+       LIMIT(term.ocx, 0, term.col-1);
+       LIMIT(term.ocy, 0, term.row-1);
+       if (term.line[term.ocy][term.ocx].mode & ATTR_WDUMMY)
+               term.ocx--;
+       if (term.line[term.c.y][cx].mode & ATTR_WDUMMY)
+               cx--;

 
 

-void
-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
-xresettitle(void) {
-       xsettitle(opt_title ? opt_title : "st");
+       drawregion(0, 0, term.col, term.row);
+       xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
+                       term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
+       term.ocx = cx;
+       term.ocy = term.c.y;
+       xfinishdraw();
+       if (ocx != term.ocx || ocy != term.ocy)
+               xximspot(term.ocx, term.ocy);

 }
 
 void
 }
 
 void

-redraw(void) {
+redraw(void)
+{

        tfulldirt();
        draw();
 }
        tfulldirt();
        draw();
 }

-
-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);
-}
-
-void
-drawregion(int x1, int y1, int x2, int y2) {
-       int i, x, y, ox, numspecs;
-       Glyph base, new;
-       XftGlyphFontSpec* specs;
-       bool ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
-
-       if(!(xw.state & WIN_VISIBLE))
-               return;
-
-       for(y = y1; y < y2; y++) {
-               if(!term.dirty[y])
-                       continue;
-
-               xtermclear(0, y, term.col, y);
-               term.dirty[y] = 0;
-
-               specs = term.specbuf;
-               numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
-
-               i = ox = 0;
-               for(x = x1; x < x2 && i < numspecs; x++) {
-                       new = term.line[y][x];
-                       if(new.mode == ATTR_WDUMMY)
-                               continue;
-                       if(ena_sel && selected(x, y))
-                               new.mode ^= ATTR_REVERSE;
-                       if(i > 0 && ATTRCMP(base, new)) {
-                               xdrawglyphfontspecs(specs, base, i, ox, y);
-                               specs += i;
-                               numspecs -= i;
-                               i = 0;
-                       }
-                       if(i == 0) {
-                               ox = x;
-                               base = new;
-                       }
-                       i++;
-               }
-               if(i > 0)
-                       xdrawglyphfontspecs(specs, base, i, ox, y);
-       }
-       xdrawcursor();
-}
-
-void
-expose(XEvent *ev) {
-       redraw();
-}
-
-void
-visibility(XEvent *ev) {
-       XVisibilityEvent *e = &ev->xvisibility;
-
-       MODBIT(xw.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
-}
-
-void
-unmap(XEvent *ev) {
-       xw.state &= ~WIN_VISIBLE;
-}
-
-void
-xsetpointermotion(int set) {
-       MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
-       XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
-}
-
-void
-xseturgency(int add) {
-       XWMHints *h = XGetWMHints(xw.dpy, xw.win);
-
-       MODBIT(h->flags, add, XUrgencyHint);
-       XSetWMHints(xw.dpy, xw.win, h);
-       XFree(h);
-}
-
-void
-focus(XEvent *ev) {
-       XFocusChangeEvent *e = &ev->xfocus;
-
-       if(e->mode == NotifyGrab)
-               return;
-
-       if(ev->type == FocusIn) {
-               XSetICFocus(xw.xic);
-               xw.state |= WIN_FOCUSED;
-               xseturgency(0);
-               if(IS_SET(MODE_FOCUS))
-                       ttywrite("\033[I", 3);
-       } else {
-               XUnsetICFocus(xw.xic);
-               xw.state &= ~WIN_FOCUSED;
-               if(IS_SET(MODE_FOCUS))
-                       ttywrite("\033[O", 3);
-       }
-}
-
-bool
-match(uint mask, uint state) {
-       return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
-}
-
-void
-numlock(const Arg *dummy) {
-       term.numlock ^= 1;
-}
-
-char*
-kmap(KeySym k, uint state) {
-       Key *kp;
-       int i;
-
-       /* 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
-kpress(XEvent *ev) {
-       XKeyEvent *e = &ev->xkey;
-       KeySym ksym;
-       char buf[32], *customkey;
-       int len;
-       Rune c;
-       Status status;
-       Shortcut *bp;
-
-       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(EXIT_SUCCESS);
-       }
-}
-
-void
-cresize(int width, int height) {
-       int col, row;
-
-       if(width != 0)
-               xw.w = width;
-       if(height != 0)
-               xw.h = height;
-
-       col = (xw.w - 2 * borderpx) / xw.cw;
-       row = (xw.h - 2 * borderpx) / xw.ch;
-
-       tresize(col, row);
-       xresize(col, row);
-       ttyresize();
-}
-
-void
-resize(XEvent *e) {
-       if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
-               return;
-
-       cresize(e->xconfigure.width, e->xconfigure.height);
-}
-
-void
-run(void) {
-       XEvent ev;
-       int w = xw.w, h = xw.h;
-       fd_set rfd;
-       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);
-               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(xev = actionfps;;) {
-               FD_ZERO(&rfd);
-               FD_SET(cmdfd, &rfd);
-               FD_SET(xfd, &rfd);
-
-               if(pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
-                       if(errno == EINTR)
-                               continue;
-                       die("select failed: %s\n", strerror(errno));
-               }
-               if(FD_ISSET(cmdfd, &rfd)) {
-                       ttyread();
-                       if(blinktimeout) {
-                               blinkset = tattrset(ATTR_BLINK);
-                               if(!blinkset)
-                                       MODBIT(term.mode, 0, MODE_BLINK);
-                       }
-               }
-
-               if(FD_ISSET(xfd, &rfd))
-                       xev = actionfps;
-
-               clock_gettime(CLOCK_MONOTONIC, &now);
-               drawtimeout.tv_sec = 0;
-               drawtimeout.tv_nsec =  (1000 * 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
-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 = false;
-               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 = True;
-               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, "");
-       XSetLocaleModifiers("");
-       tnew(MAX(cols, 1), MAX(rows, 1));
-       xinit();
-       selinit();
-       run();
-
-       return 0;
-}
-