From d88145fdf91a1681c385b9387cdb45c06822c634 Mon Sep 17 00:00:00 2001
From: Keith Bowes <keithbowes@users.noreply.github.com>
Date: Sun, 16 Jun 2019 14:53:47 -0400
Subject: st => wterm

---
 src/st.c    | 4063 -----------------------------------------------------------
 src/wterm.c | 4063 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 4063 insertions(+), 4063 deletions(-)
 delete mode 100644 src/st.c
 create mode 100644 src/wterm.c

(limited to 'src')

diff --git a/src/st.c b/src/st.c
deleted file mode 100644
index 4db4c0c..0000000
--- a/src/st.c
+++ /dev/null
@@ -1,4063 +0,0 @@
-/* See LICENSE for license details. */
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <limits.h>
-/* for BTN_* definitions */
-#include "wld/wayland.h"
-#include "wld/wld.h"
-#include <fontconfig/fontconfig.h>
-#include <libgen.h>
-#include <linux/input.h>
-#include <locale.h>
-#include <pwd.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/select.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <time.h>
-#include <unistd.h>
-#include <wayland-client.h>
-#include <wayland-cursor.h>
-#include <wchar.h>
-#include <xkbcommon/xkbcommon.h>
-
-#include "arg.h"
-#include "xdg-shell-unstable-v5-client-protocol.h"
-#include "xdg-shell-unstable-v6-client-protocol.h"
-
-char *argv0;
-
-#if defined(__linux)
-#include <pty.h>
-#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
-#include <util.h>
-#elif defined(__FreeBSD__) || defined(__DragonFly__)
-#include <libutil.h>
-#endif
-
-/* Arbitrary sizes */
-#define UTF_INVALID 0xFFFD
-#define UTF_SIZ 4
-#define ESC_BUF_SIZ (128 * UTF_SIZ)
-#define ESC_ARG_SIZ 16
-#define STR_BUF_SIZ ESC_BUF_SIZ
-#define STR_ARG_SIZ ESC_ARG_SIZ
-#define DRAW_BUF_SIZ 20 * 1024
-#define XK_ANY_MOD UINT_MAX
-#define XK_NO_MOD 0
-#define XK_SWITCH_MOD (1 << 13)
-
-#define MOD_MASK_ANY UINT_MAX
-#define MOD_MASK_NONE 0
-#define MOD_MASK_CTRL (1 << 0)
-#define MOD_MASK_ALT (1 << 1)
-#define MOD_MASK_SHIFT (1 << 2)
-#define MOD_MASK_LOGO (1 << 3)
-
-#define AXIS_VERTICAL WL_POINTER_AXIS_VERTICAL_SCROLL
-#define AXIS_HORIZONTAL WL_POINTER_AXIS_HORIZONTAL_SCROLL
-
-/* macros */
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-#define MAX(a, b) ((a) < (b) ? (b) : (a))
-#define LEN(a) (sizeof(a) / sizeof(a)[0])
-#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
-#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
-#define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
-#define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
-#define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
-#define ISDELIM(u) (utf8strchr(worddelimiters, u) != NULL)
-#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
-#define ATTRCMP(a, b)                                                          \
-  ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
-#define IS_SET(flag) ((term.mode & (flag)) != 0)
-#define TIMEDIFF(t1, t2)                                                       \
-  ((t1.tv_sec - t2.tv_sec) * 1000 + (t1.tv_nsec - t2.tv_nsec) / 1E6)
-#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
-
-#define TRUECOLOR(r, g, b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
-#define IS_TRUECOL(x) (1 << 24 & (x))
-#define TRUERED(x) (((x)&0xff0000) >> 8)
-#define TRUEGREEN(x) (((x)&0xff00))
-#define TRUEBLUE(x) (((x)&0xff) << 8)
-
-enum glyph_attribute {
-  ATTR_NULL = 0,
-  ATTR_BOLD = 1 << 0,
-  ATTR_FAINT = 1 << 1,
-  ATTR_ITALIC = 1 << 2,
-  ATTR_UNDERLINE = 1 << 3,
-  ATTR_BLINK = 1 << 4,
-  ATTR_REVERSE = 1 << 5,
-  ATTR_INVISIBLE = 1 << 6,
-  ATTR_STRUCK = 1 << 7,
-  ATTR_WRAP = 1 << 8,
-  ATTR_WIDE = 1 << 9,
-  ATTR_WDUMMY = 1 << 10,
-  ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
-};
-
-enum cursor_movement { CURSOR_SAVE, CURSOR_LOAD };
-
-enum cursor_state {
-  CURSOR_DEFAULT = 0,
-  CURSOR_WRAPNEXT = 1,
-  CURSOR_ORIGIN = 2
-};
-
-enum term_mode {
-  MODE_WRAP = 1 << 0,
-  MODE_INSERT = 1 << 1,
-  MODE_APPKEYPAD = 1 << 2,
-  MODE_ALTSCREEN = 1 << 3,
-  MODE_CRLF = 1 << 4,
-  MODE_MOUSEBTN = 1 << 5,
-  MODE_MOUSEMOTION = 1 << 6,
-  MODE_REVERSE = 1 << 7,
-  MODE_KBDLOCK = 1 << 8,
-  MODE_HIDE = 1 << 9,
-  MODE_ECHO = 1 << 10,
-  MODE_APPCURSOR = 1 << 11,
-  MODE_MOUSESGR = 1 << 12,
-  MODE_8BIT = 1 << 13,
-  MODE_BLINK = 1 << 14,
-  MODE_FBLINK = 1 << 15,
-  MODE_FOCUS = 1 << 16,
-  MODE_MOUSEX10 = 1 << 17,
-  MODE_MOUSEMANY = 1 << 18,
-  MODE_BRCKTPASTE = 1 << 19,
-  MODE_PRINT = 1 << 20,
-  MODE_MOUSE =
-      MODE_MOUSEBTN | MODE_MOUSEMOTION | MODE_MOUSEX10 | MODE_MOUSEMANY,
-};
-
-enum charset {
-  CS_GRAPHIC0,
-  CS_GRAPHIC1,
-  CS_UK,
-  CS_USA,
-  CS_MULTI,
-  CS_GER,
-  CS_FIN
-};
-
-enum escape_state {
-  ESC_START = 1,
-  ESC_CSI = 2,
-  ESC_STR = 4, /* DCS, OSC, PM, APC */
-  ESC_ALTCHARSET = 8,
-  ESC_STR_END = 16, /* a final string was encountered */
-  ESC_TEST = 32,    /* Enter in test mode */
-};
-
-enum window_state { WIN_VISIBLE = 1, WIN_FOCUSED = 2 };
-
-enum selection_mode { SEL_IDLE = 0, SEL_EMPTY = 1, SEL_READY = 2 };
-
-enum selection_type { SEL_REGULAR = 1, SEL_RECTANGULAR = 2 };
-
-enum selection_snap { SNAP_WORD = 1, SNAP_LINE = 2 };
-
-typedef unsigned char uchar;
-typedef unsigned int uint;
-typedef unsigned long ulong;
-typedef unsigned short ushort;
-
-typedef uint_least32_t Rune;
-
-typedef struct {
-  Rune u;      /* character code */
-  ushort mode; /* attribute flags */
-  uint32_t fg; /* foreground  */
-  uint32_t bg; /* background  */
-} Glyph;
-
-typedef Glyph *Line;
-
-typedef struct {
-  Glyph attr; /* current char attributes */
-  int x;
-  int y;
-  char state;
-} TCursor;
-
-/* CSI Escape sequence structs */
-/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
-typedef struct {
-  char buf[ESC_BUF_SIZ]; /* raw string */
-  int len;               /* raw string length */
-  char priv;
-  int arg[ESC_ARG_SIZ];
-  int narg; /* nb of args */
-  char mode[2];
-} CSIEscape;
-
-/* STR Escape sequence structs */
-/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
-typedef struct {
-  char type;             /* ESC type ... */
-  char buf[STR_BUF_SIZ]; /* raw string */
-  int len;               /* raw string length */
-  char *args[STR_ARG_SIZ];
-  int narg; /* nb of args */
-} STREscape;
-
-/* Internal representation of the screen */
-typedef struct {
-  int row;         /* nb row */
-  int col;         /* nb col */
-  Line *line;      /* screen */
-  Line *alt;       /* alternate screen */
-  int *dirty;      /* dirtyness of lines */
-  TCursor c;       /* cursor */
-  int top;         /* top    scroll limit */
-  int bot;         /* bottom scroll limit */
-  int mode;        /* terminal mode flags */
-  int esc;         /* escape state flags */
-  char trantbl[4]; /* charset table translation */
-  int charset;     /* current charset */
-  int icharset;    /* selected charset for sequence */
-  int numlock;     /* lock numbers in keyboard */
-  int *tabs;
-} Term;
-
-typedef struct {
-  struct xkb_context *ctx;
-  struct xkb_keymap *keymap;
-  struct xkb_state *state;
-  xkb_mod_index_t ctrl, alt, shift, logo;
-  unsigned int mods;
-} XKB;
-
-typedef struct {
-  struct wl_display *dpy;
-  struct wl_compositor *cmp;
-  struct wl_shm *shm;
-  struct wl_seat *seat;
-  struct wl_keyboard *keyboard;
-  struct wl_pointer *pointer;
-  struct wl_data_device_manager *datadevmanager;
-  struct wl_data_device *datadev;
-  struct wl_data_offer *seloffer;
-  struct wl_surface *surface;
-  struct wl_buffer *buffer;
-  struct zxdg_shell_v6 *xdgshell_v6;
-  struct wl_shell *shell;
-  struct wl_shell_surface *shellsurf;
-  struct xdg_shell *xdgshell;
-  struct xdg_surface *xdgsurface;
-  struct wl_surface *popupsurface;
-  struct zxdg_surface_v6 *xdgsurface_v6;
-  struct zxdg_toplevel_v6 *xdgtoplevel;
-  XKB xkb;
-  bool configured;
-  int px, py; /* pointer x and y */
-  int tw, th; /* tty width and height */
-  int w, h;   /* window width and height */
-  int ch;     /* char height */
-  int cw;     /* char width  */
-  int vis;
-  char state; /* focus, redraw, visible */
-  int cursor; /* cursor style */
-  struct wl_callback *framecb;
-} Wayland;
-
-typedef struct {
-  struct wld_context *ctx;
-  struct wld_font_context *fontctx;
-  struct wld_renderer *renderer;
-  struct wld_buffer *buffer, *oldbuffer;
-} WLD;
-
-typedef struct {
-  struct wl_cursor_theme *theme;
-  struct wl_cursor *cursor;
-  struct wl_surface *surface;
-} Cursor;
-
-typedef struct {
-  uint b;
-  uint mask;
-  char *s;
-} Mousekey;
-
-typedef struct {
-  int axis;
-  int dir;
-  uint mask;
-  char s[ESC_BUF_SIZ];
-} Axiskey;
-
-typedef struct {
-  xkb_keysym_t k;
-  uint mask;
-  char *s;
-  /* three valued logic variables: 0 indifferent, 1 on, -1 off */
-  signed char appkey;    /* application keypad */
-  signed char appcursor; /* application cursor */
-  signed char crlf;      /* crlf mode          */
-} Key;
-
-typedef struct {
-  int mode;
-  int type;
-  int snap;
-  /*
-   * Selection variables:
-   * nb – normalized coordinates of the beginning of the selection
-   * ne – normalized coordinates of the end of the selection
-   * ob – original coordinates of the beginning of the selection
-   * oe – original coordinates of the end of the selection
-   */
-  struct {
-    int x, y;
-  } nb, ne, ob, oe;
-
-  char *primary;
-  struct wl_data_source *source;
-  int alt;
-  uint32_t tclick1, tclick2;
-} Selection;
-
-typedef union {
-  int i;
-  uint ui;
-  float f;
-  const void *v;
-} Arg;
-
-typedef struct {
-  uint mod;
-  xkb_keysym_t keysym;
-  void (*func)(const Arg *);
-  const Arg arg;
-} Shortcut;
-
-typedef struct {
-  char str[32];
-  uint32_t key;
-  int len;
-  bool started;
-  struct timespec last;
-} Repeat;
-
-/* function definitions used in config.h */
-static void numlock(const Arg *);
-static void selpaste(const Arg *);
-static void wlzoom(const Arg *);
-static void wlzoomabs(const Arg *);
-static void wlzoomreset(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;
-  struct wld_font *match;
-  FcFontSet *set;
-  FcPattern *pattern;
-} Font;
-
-/* Drawing Context */
-typedef struct {
-  uint32_t col[MAX(LEN(colorname), 256)];
-  Font font, bfont, ifont, ibfont;
-} 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 sigchld(int);
-static void run(void);
-static void cresize(int, int);
-
-static void csidump(void);
-static void csihandle(void);
-static void csiparse(void);
-static void csireset(void);
-static int eschandle(uchar);
-static void strdump(void);
-static void strhandle(void);
-static void strparse(void);
-static void strreset(void);
-
-static int tattrset(int);
-static void tprinter(char *, size_t);
-static void tdumpsel(void);
-static void tdumpline(int);
-static void tdump(void);
-static void tclearregion(int, int, int, int);
-static void tcursor(int);
-static void tdeletechar(int);
-static void tdeleteline(int);
-static void tinsertblank(int);
-static void tinsertblankline(int);
-static 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 tresize(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 tsetscroll(int, int);
-static void tswapscreen(void);
-static void tsetdirt(int, int);
-static void tsetdirtattr(int);
-static void tsetmode(int, int, int *, int);
-static void tfulldirt(void);
-static void techo(Rune);
-static void tcontrolcode(uchar);
-static void tdectest(char);
-static uint32_t tdefcolor(int *, int *, int);
-static void tdeftran(char);
-static inline int match(uint, uint);
-static void ttynew(void);
-static void ttyread(void);
-static void ttyresize(void);
-static void ttysend(char *, size_t);
-static void ttywrite(const char *, size_t);
-static void tstrsequence(uchar);
-
-static inline uchar sixd_to_8bit(int);
-static void wldraws(char *, Glyph, int, int, int, int);
-static void wldrawglyph(Glyph, int, int);
-static void wlclear(int, int, int, int);
-static void wldrawcursor(void);
-static void wlinit(void);
-static void wlloadcols(void);
-static int wlsetcolorname(int, const char *);
-static void wlloadcursor(void);
-static int wlloadfont(Font *, FcPattern *);
-static void wlloadfonts(char *, double);
-static void wlsettitle(char *);
-static void wlresettitle(void);
-static void wlseturgency(int);
-static void wlsetsel(char *, uint32_t);
-static void wltermclear(int, int, int, int);
-static void wlunloadfont(Font *f);
-static void wlunloadfonts(void);
-static void wlresize(int, int);
-
-static void regglobal(void *, struct wl_registry *, uint32_t, const char *,
-                      uint32_t);
-static void regglobalremove(void *, struct wl_registry *, uint32_t);
-static void surfenter(void *, struct wl_surface *, struct wl_output *);
-static void surfleave(void *, struct wl_surface *, struct wl_output *);
-static void framedone(void *, struct wl_callback *, uint32_t);
-static void kbdkeymap(void *, struct wl_keyboard *, uint32_t, int32_t,
-                      uint32_t);
-static void kbdenter(void *, struct wl_keyboard *, uint32_t,
-                     struct wl_surface *, struct wl_array *);
-static void kbdleave(void *, struct wl_keyboard *, uint32_t,
-                     struct wl_surface *);
-static void kbdkey(void *, struct wl_keyboard *, uint32_t, uint32_t, uint32_t,
-                   uint32_t);
-static void kbdmodifiers(void *, struct wl_keyboard *, uint32_t, uint32_t,
-                         uint32_t, uint32_t, uint32_t);
-static void kbdrepeatinfo(void *, struct wl_keyboard *, int32_t, int32_t);
-static void ptrenter(void *, struct wl_pointer *, uint32_t, struct wl_surface *,
-                     wl_fixed_t, wl_fixed_t);
-static void ptrleave(void *, struct wl_pointer *, uint32_t,
-                     struct wl_surface *);
-static void ptrmotion(void *, struct wl_pointer *, uint32_t, wl_fixed_t,
-                      wl_fixed_t);
-static void ptrbutton(void *, struct wl_pointer *, uint32_t, uint32_t, uint32_t,
-                      uint32_t);
-static void ptraxis(void *, struct wl_pointer *, uint32_t, uint32_t,
-                    wl_fixed_t);
-
-static void shellsurfping(void *, struct wl_shell_surface *, uint32_t);
-static void shellsurfconfigure(void *, struct wl_shell_surface *, uint32_t,
-                               int32_t, int32_t);
-static void shellsurfpopupdone(void *, struct wl_shell_surface *);
-
-static void xdgshellv6ping(void *, struct zxdg_shell_v6 *, uint32_t);
-static void xdgsurfv6configure(void *, struct zxdg_surface_v6 *, uint32_t);
-static void xdgsurfconfigure(void *, struct xdg_surface *, int32_t, int32_t,
-                             struct wl_array *, uint32_t);
-static void xdgsurfclose(void *, struct xdg_surface *);
-static void xdgtopconfigure(void *, struct zxdg_toplevel_v6 *, int32_t, int32_t,
-                            struct wl_array *);
-static void xdgtopclose(void *, struct zxdg_toplevel_v6 *);
-static void xdgshellping(void *, struct xdg_shell *, uint32_t);
-static void datadevoffer(void *, struct wl_data_device *,
-                         struct wl_data_offer *);
-static void datadeventer(void *, struct wl_data_device *, uint32_t,
-                         struct wl_surface *, wl_fixed_t, wl_fixed_t,
-                         struct wl_data_offer *);
-static void datadevleave(void *, struct wl_data_device *);
-static void datadevmotion(void *, struct wl_data_device *, uint32_t,
-                          wl_fixed_t x, wl_fixed_t y);
-static void datadevdrop(void *, struct wl_data_device *);
-static void datadevselection(void *, struct wl_data_device *,
-                             struct wl_data_offer *);
-static void dataofferoffer(void *, struct wl_data_offer *, const char *);
-static void datasrctarget(void *, struct wl_data_source *, const char *);
-static void datasrcsend(void *, struct wl_data_source *, const char *, int32_t);
-static void datasrccancelled(void *, struct wl_data_source *);
-
-static void selinit(void);
-static void selnormalize(void);
-static inline int selected(int, int);
-static char *getsel(void);
-static void selcopy(uint32_t);
-static void selscroll(int, int);
-static void selsnap(int *, int *, int);
-static int x2col(int);
-static int y2row(int);
-
-static size_t utf8decode(char *, Rune *, size_t);
-static Rune utf8decodebyte(char, size_t *);
-static size_t utf8encode(Rune, char *);
-static char utf8encodebyte(Rune, size_t);
-static char *utf8strchr(char *s, Rune u);
-static size_t utf8validate(Rune *, size_t);
-
-static ssize_t xwrite(int, const char *, size_t);
-static void *xmalloc(size_t);
-static void *xrealloc(void *, size_t);
-static char *xstrdup(char *);
-
-static void usage(void);
-
-static struct wl_registry_listener reglistener = {regglobal, regglobalremove};
-static struct wl_surface_listener surflistener = {surfenter, surfleave};
-static struct wl_callback_listener framelistener = {framedone};
-static struct wl_keyboard_listener kbdlistener = {
-    kbdkeymap, kbdenter, kbdleave, kbdkey, kbdmodifiers, kbdrepeatinfo};
-static struct wl_pointer_listener ptrlistener = {ptrenter, ptrleave, ptrmotion,
-                                                 ptrbutton, ptraxis};
-static struct zxdg_shell_v6_listener shell_v6_listener = {xdgshellv6ping};
-static struct zxdg_surface_v6_listener surf_v6_listener = {xdgsurfv6configure};
-static struct xdg_shell_listener shell_listener = {xdgshellping};
-static struct wl_shell_surface_listener shellsurf_listener = {
-    shellsurfping, shellsurfconfigure, shellsurfpopupdone};
-static struct xdg_surface_listener xdgsurflistener = {xdgsurfconfigure,
-                                                      xdgsurfclose};
-static struct zxdg_toplevel_v6_listener xdgtoplevellistener = {xdgtopconfigure,
-                                                               xdgtopclose};
-static struct wl_data_device_listener datadevlistener = {
-    datadevoffer,  datadeventer, datadevleave,
-    datadevmotion, datadevdrop,  datadevselection};
-static struct wl_data_offer_listener dataofferlistener = {dataofferoffer};
-static struct wl_data_source_listener datasrclistener = {
-    datasrctarget, datasrcsend, datasrccancelled};
-
-/* Globals */
-static DC dc;
-static Wayland wl;
-static WLD wld;
-static Cursor cursor;
-static Term term;
-static CSIEscape csiescseq;
-static STREscape strescseq;
-static int cmdfd;
-static pid_t pid;
-static Selection sel;
-static Repeat repeat;
-static bool needdraw = true;
-static int iofd = 1;
-static char **opt_cmd = NULL;
-static char *opt_io = NULL;
-static char *opt_title = 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 int oldx, oldy;
-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 {
-  struct wld_font *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;
-
-ssize_t xwrite(int fd, const char *s, size_t len) {
-  size_t aux = len;
-  ssize_t r;
-
-  while (len > 0) {
-    r = write(fd, s, len);
-    if (r < 0)
-      return r;
-    len -= r;
-    s += r;
-  }
-
-  return aux;
-}
-
-void *xmalloc(size_t len) {
-  void *p = malloc(len);
-
-  if (!p)
-    die("Out of memory\n");
-
-  return p;
-}
-
-void *xrealloc(void *p, size_t len) {
-  if ((p = realloc(p, len)) == NULL)
-    die("Out of memory\n");
-
-  return p;
-}
-
-char *xstrdup(char *s) {
-  if ((s = strdup(s)) == NULL)
-    die("Out of memory\n");
-
-  return s;
-}
-
-size_t utf8decode(char *c, Rune *u, size_t clen) {
-  size_t i, j, len, type;
-  Rune udecoded;
-
-  *u = UTF_INVALID;
-  if (!clen)
-    return 0;
-  udecoded = utf8decodebyte(c[0], &len);
-  if (!BETWEEN(len, 1, UTF_SIZ))
-    return 1;
-  for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
-    udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
-    if (type != 0)
-      return j;
-  }
-  if (j < len)
-    return 0;
-  *u = udecoded;
-  utf8validate(u, len);
-
-  return len;
-}
-
-Rune utf8decodebyte(char c, size_t *i) {
-  for (*i = 0; *i < LEN(utfmask); ++(*i))
-    if (((uchar)c & utfmask[*i]) == utfbyte[*i])
-      return (uchar)c & ~utfmask[*i];
-
-  return 0;
-}
-
-size_t utf8encode(Rune u, char *c) {
-  size_t len, i;
-
-  len = utf8validate(&u, 0);
-  if (len > UTF_SIZ)
-    return 0;
-
-  for (i = len - 1; i != 0; --i) {
-    c[i] = utf8encodebyte(u, 0);
-    u >>= 6;
-  }
-  c[0] = utf8encodebyte(u, len);
-
-  return len;
-}
-
-char utf8encodebyte(Rune u, size_t 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 utf8validate(Rune *u, size_t i) {
-  if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
-    *u = UTF_INVALID;
-  for (i = 1; *u > utfmax[i]; ++i)
-    ;
-
-  return i;
-}
-
-void selinit(void) {
-  sel.tclick1 = 0;
-  sel.tclick2 = 0;
-  sel.mode = SEL_IDLE;
-  sel.ob.x = -1;
-  sel.primary = NULL;
-  sel.source = NULL;
-}
-
-int x2col(int x) {
-  x -= borderpx;
-  x /= wl.cw;
-
-  return LIMIT(x, 0, term.col - 1);
-}
-
-int y2row(int y) {
-  y -= borderpx;
-  y /= wl.ch;
-
-  return LIMIT(y, 0, term.row - 1);
-}
-
-int tlinelen(int y) {
-  int i = term.col;
-
-  if (term.line[y][i - 1].mode & ATTR_WRAP)
-    return i;
-
-  while (i > 0 && term.line[y][i - 1].u == ' ')
-    --i;
-
-  return i;
-}
-
-void selnormalize(void) {
-  int i;
-
-  if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
-    sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
-    sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
-  } else {
-    sel.nb.x = MIN(sel.ob.x, sel.oe.x);
-    sel.ne.x = MAX(sel.ob.x, sel.oe.x);
-  }
-  sel.nb.y = MIN(sel.ob.y, sel.oe.y);
-  sel.ne.y = MAX(sel.ob.y, sel.oe.y);
-
-  selsnap(&sel.nb.x, &sel.nb.y, -1);
-  selsnap(&sel.ne.x, &sel.ne.y, +1);
-
-  /* expand selection over line breaks */
-  if (sel.type == SEL_RECTANGULAR)
-    return;
-  i = tlinelen(sel.nb.y);
-  if (i < sel.nb.x)
-    sel.nb.x = i;
-  if (tlinelen(sel.ne.y) <= sel.ne.x)
-    sel.ne.x = term.col - 1;
-}
-
-int selected(int x, int y) {
-  if (sel.mode == SEL_EMPTY)
-    return 0;
-
-  if (sel.type == SEL_RECTANGULAR)
-    return BETWEEN(y, sel.nb.y, sel.ne.y) && BETWEEN(x, sel.nb.x, sel.ne.x);
-
-  return BETWEEN(y, sel.nb.y, sel.ne.y) && (y != sel.nb.y || x >= sel.nb.x) &&
-         (y != sel.ne.y || x <= sel.ne.x);
-}
-
-void selsnap(int *x, int *y, int direction) {
-  int newx, newy, xt, yt;
-  int delim, prevdelim;
-  Glyph *gp, *prevgp;
-
-  switch (sel.snap) {
-  case SNAP_WORD:
-    /*
-     * Snap around if the word wraps around at the end or
-     * beginning of a line.
-     */
-    prevgp = &term.line[*y][*x];
-    prevdelim = ISDELIM(prevgp->u);
-    for (;;) {
-      newx = *x + direction;
-      newy = *y;
-      if (!BETWEEN(newx, 0, term.col - 1)) {
-        newy += direction;
-        newx = (newx + term.col) % term.col;
-        if (!BETWEEN(newy, 0, term.row - 1))
-          break;
-
-        if (direction > 0)
-          yt = *y, xt = *x;
-        else
-          yt = newy, xt = newx;
-        if (!(term.line[yt][xt].mode & ATTR_WRAP))
-          break;
-      }
-
-      if (newx >= tlinelen(newy))
-        break;
-
-      gp = &term.line[newy][newx];
-      delim = ISDELIM(gp->u);
-      if (!(gp->mode & ATTR_WDUMMY) &&
-          (delim != prevdelim || (delim && gp->u != prevgp->u)))
-        break;
-
-      *x = newx;
-      *y = newy;
-      prevgp = gp;
-      prevdelim = delim;
-    }
-    break;
-  case SNAP_LINE:
-    /*
-     * Snap around if the the previous line or the current one
-     * has set ATTR_WRAP at its end. Then the whole next or
-     * previous line will be selected.
-     */
-    *x = (direction < 0) ? 0 : term.col - 1;
-    if (direction < 0) {
-      for (; *y > 0; *y += direction) {
-        if (!(term.line[*y - 1][term.col - 1].mode & ATTR_WRAP)) {
-          break;
-        }
-      }
-    } else if (direction > 0) {
-      for (; *y < term.row - 1; *y += direction) {
-        if (!(term.line[*y][term.col - 1].mode & ATTR_WRAP)) {
-          break;
-        }
-      }
-    }
-    break;
-  }
-}
-
-void getbuttoninfo(void) {
-  int type;
-  uint state = wl.xkb.mods & ~forceselmod;
-
-  sel.alt = IS_SET(MODE_ALTSCREEN);
-
-  sel.oe.x = x2col(wl.px);
-  sel.oe.y = y2row(wl.py);
-  selnormalize();
-
-  sel.type = SEL_REGULAR;
-  for (type = 1; type < LEN(selmasks); ++type) {
-    if (match(selmasks[type], state)) {
-      sel.type = type;
-      break;
-    }
-  }
-}
-
-void wlmousereport(int button, bool release, int x, int y) {
-  int len;
-  char buf[40];
-
-  if (!IS_SET(MODE_MOUSEX10)) {
-    button += ((wl.xkb.mods & MOD_MASK_SHIFT) ? 4 : 0) +
-              ((wl.xkb.mods & MOD_MASK_LOGO) ? 8 : 0) +
-              ((wl.xkb.mods & MOD_MASK_CTRL) ? 16 : 0);
-  }
-
-  if (IS_SET(MODE_MOUSESGR)) {
-    len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c", button, x + 1, y + 1,
-                   release ? '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 wlmousereportbutton(uint32_t button, uint32_t state) {
-  bool release = state == WL_POINTER_BUTTON_STATE_RELEASED;
-
-  if (!IS_SET(MODE_MOUSESGR) && release) {
-    button = 3;
-  } else {
-    switch (button) {
-    case BTN_LEFT:
-      button = 0;
-      break;
-    case BTN_MIDDLE:
-      button = 1;
-      break;
-    case BTN_RIGHT:
-      button = 2;
-      break;
-    }
-  }
-
-  oldbutton = release ? 3 : button;
-
-  /* don't report release events when in X10 mode */
-  if (IS_SET(MODE_MOUSEX10) && release) {
-    return;
-  }
-
-  wlmousereport(button, release, oldx, oldy);
-}
-
-void wlmousereportmotion(wl_fixed_t fx, wl_fixed_t fy) {
-  int x = x2col(wl_fixed_to_int(fx)), y = y2row(wl_fixed_to_int(fy));
-
-  if (x == oldx && y == oldy)
-    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;
-
-  oldx = x;
-  oldy = y;
-  wlmousereport(oldbutton + 32, false, x, y);
-}
-
-void wlmousereportaxis(uint32_t axis, wl_fixed_t amount) {
-  wlmousereport(64 + (axis == AXIS_VERTICAL ? 4 : 6) + (amount > 0 ? 1 : 0),
-                false, oldx, oldy);
-}
-
-char *getsel(void) {
-  char *str, *ptr;
-  int y, bufsize, lastx, linelen;
-  Glyph *gp, *last;
-
-  if (sel.ob.x == -1)
-    return NULL;
-
-  bufsize = (term.col + 1) * (sel.ne.y - sel.nb.y + 1) * UTF_SIZ;
-  ptr = str = xmalloc(bufsize);
-
-  /* append every set & selected glyph to the selection */
-  for (y = sel.nb.y; y <= sel.ne.y; y++) {
-    linelen = tlinelen(y);
-
-    if (sel.type == SEL_RECTANGULAR) {
-      gp = &term.line[y][sel.nb.x];
-      lastx = sel.ne.x;
-    } else {
-      gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
-      lastx = (sel.ne.y == y) ? sel.ne.x : term.col - 1;
-    }
-    last = &term.line[y][MIN(lastx, linelen - 1)];
-    while (last >= gp && last->u == ' ')
-      --last;
-
-    for (; gp <= last; ++gp) {
-      if (gp->mode & ATTR_WDUMMY)
-        continue;
-
-      ptr += utf8encode(gp->u, ptr);
-    }
-
-    /*
-     * Copy and pasting of line endings is inconsistent
-     * in the inconsistent terminal and GUI world.
-     * The best solution seems like to produce '\n' when
-     * something is copied from st and convert '\n' to
-     * '\r', when something to be pasted is received by
-     * st.
-     * FIXME: Fix the computer world.
-     */
-    if ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
-      *ptr++ = '\n';
-  }
-  *ptr = 0;
-  return str;
-}
-
-void selcopy(uint32_t serial) { wlsetsel(getsel(), serial); }
-
-static inline void selwritebuf(char *buf, int len) {
-  char *repl = buf;
-
-  /*
-   * 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.
-   */
-  while ((repl = memchr(repl, '\n', len))) {
-    *repl++ = '\r';
-  }
-
-  if (IS_SET(MODE_BRCKTPASTE))
-    ttywrite("\033[200~", 6);
-  ttysend(buf, len);
-  if (IS_SET(MODE_BRCKTPASTE))
-    ttywrite("\033[201~", 6);
-}
-
-void selpaste(const Arg *dummy) {
-  int fds[2], len, left;
-  char buf[BUFSIZ], *str;
-
-  if (wl.seloffer) {
-    /* check if we are pasting from ourselves */
-    if (sel.source) {
-      str = sel.primary;
-      left = strlen(sel.primary);
-      while (left > 0) {
-        len = MIN(sizeof buf, left);
-        memcpy(buf, str, len);
-        selwritebuf(buf, len);
-        left -= len;
-        str += len;
-      }
-    } else {
-      pipe(fds);
-      wl_data_offer_receive(wl.seloffer, "text/plain", fds[1]);
-      wl_display_flush(wl.dpy);
-      close(fds[1]);
-      while ((len = read(fds[0], buf, sizeof buf)) > 0) {
-        selwritebuf(buf, len);
-      }
-      close(fds[0]);
-    }
-  }
-}
-
-void selclear(void) {
-  if (sel.ob.x == -1)
-    return;
-  sel.mode = SEL_IDLE;
-  sel.ob.x = -1;
-  tsetdirt(sel.nb.y, sel.ne.y);
-}
-
-void wlsetsel(char *str, uint32_t serial) {
-  free(sel.primary);
-  sel.primary = str;
-
-  if (str) {
-    sel.source = wl_data_device_manager_create_data_source(wl.datadevmanager);
-    wl_data_source_add_listener(sel.source, &datasrclistener, NULL);
-    wl_data_source_offer(sel.source, "text/plain; charset=utf-8");
-  } else {
-    sel.source = NULL;
-  }
-  wl_data_device_set_selection(wl.datadev, sel.source, serial);
-}
-
-void die(const char *errstr, ...) {
-  va_list ap;
-
-  va_start(ap, errstr);
-  vfprintf(stdout, errstr, ap);
-  va_end(ap);
-  exit(1);
-}
-
-void execsh(void) {
-  char **args, *sh, *prog;
-  const struct passwd *pw;
-
-  errno = 0;
-  if ((pw = getpwuid(getuid())) == NULL) {
-    if (errno)
-      die("getpwuid:%s\n", strerror(errno));
-    else
-      die("who are you?\n");
-  }
-
-  if ((sh = getenv("SHELL")) == NULL)
-    sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
-
-  if (opt_cmd)
-    prog = opt_cmd[0];
-  else if (utmp)
-    prog = utmp;
-  else
-    prog = sh;
-  args = (opt_cmd) ? opt_cmd : (char *[]){prog, NULL};
-
-  unsetenv("COLUMNS");
-  unsetenv("LINES");
-  unsetenv("TERMCAP");
-  setenv("LOGNAME", pw->pw_name, 1);
-  setenv("USER", pw->pw_name, 1);
-  setenv("SHELL", sh, 1);
-  setenv("HOME", pw->pw_dir, 1);
-  setenv("TERM", termname, 1);
-
-  signal(SIGCHLD, SIG_DFL);
-  signal(SIGHUP, SIG_DFL);
-  signal(SIGINT, SIG_DFL);
-  signal(SIGQUIT, SIG_DFL);
-  signal(SIGTERM, SIG_DFL);
-  signal(SIGALRM, SIG_DFL);
-
-  execvp(prog, args);
-  _exit(1);
-}
-
-void sigchld(int a) {
-  int stat;
-  pid_t p;
-
-  if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
-    die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
-
-  if (pid != p)
-    return;
-
-  if (!WIFEXITED(stat) || WEXITSTATUS(stat))
-    die("child finished with error '%d'\n", stat);
-  exit(0);
-}
-
-void stty(void) {
-  char cmd[_POSIX_ARG_MAX], **p, *q, *s;
-  size_t n, siz;
-
-  if ((n = strlen(stty_args)) > sizeof(cmd) - 1)
-    die("incorrect stty parameters\n");
-  memcpy(cmd, stty_args, n);
-  q = cmd + n;
-  siz = sizeof(cmd) - n;
-  for (p = opt_cmd; p && (s = *p); ++p) {
-    if ((n = strlen(s)) > siz - 1)
-      die("stty parameter length too long\n");
-    *q++ = ' ';
-    q = memcpy(q, s, n);
-    q += n;
-    siz -= n + 1;
-  }
-  *q = '\0';
-  if (system(cmd) != 0)
-    perror("Couldn't call stty");
-}
-
-void ttynew(void) {
-  int m, s;
-  struct winsize w = {term.row, term.col, 0, 0};
-
-  if (opt_io) {
-    term.mode |= MODE_PRINT;
-    iofd = (!strcmp(opt_io, "-")) ? 1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
-    if (iofd < 0) {
-      fprintf(stderr, "Error opening %s:%s\n", opt_io, strerror(errno));
-    }
-  }
-
-  if (opt_line) {
-    if ((cmdfd = open(opt_line, O_RDWR)) < 0)
-      die("open line failed: %s\n", strerror(errno));
-    close(0);
-    dup(cmdfd);
-    stty();
-    return;
-  }
-
-  /* seems to work fine on linux, openbsd and freebsd */
-  if (openpty(&m, &s, NULL, NULL, &w) < 0)
-    die("openpty failed: %s\n", strerror(errno));
-
-  switch (pid = fork()) {
-  case -1:
-    die("fork failed\n");
-    break;
-  case 0:
-    close(iofd);
-    setsid(); /* create a new process group */
-    dup2(s, 0);
-    dup2(s, 1);
-    dup2(s, 2);
-    if (ioctl(s, TIOCSCTTY, NULL) < 0)
-      die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
-    close(s);
-    close(m);
-    execsh();
-    break;
-  default:
-    close(s);
-    cmdfd = m;
-    signal(SIGCHLD, sigchld);
-    break;
-  }
-}
-
-void ttyread(void) {
-  static char buf[BUFSIZ];
-  static int buflen = 0;
-  char *ptr;
-  int charsize; /* size of utf8 char in bytes */
-  Rune unicodep;
-  int ret;
-
-  /* append read bytes to unprocessed bytes */
-  if ((ret = read(cmdfd, buf + buflen, LEN(buf) - buflen)) < 0)
-    die("Couldn't read from shell: %s\n", strerror(errno));
-
-  /* process every complete utf8 char */
-  buflen += ret;
-  ptr = buf;
-  while ((charsize = utf8decode(ptr, &unicodep, buflen))) {
-    tputc(unicodep);
-    ptr += charsize;
-    buflen -= charsize;
-  }
-
-  /* keep any uncomplete utf8 char for the next call */
-  memmove(buf, ptr, buflen);
-  needdraw = true;
-}
-
-void ttywrite(const char *s, size_t n) {
-  fd_set wfd;
-  struct timespec tv;
-  ssize_t r;
-
-  /*
-   * Remember that we are using a pty, which might be a modem line.
-   * Writing too much will clog the line. That's why we are doing this
-   * dance.
-   * FIXME: Migrate the world to Plan 9.
-   */
-  while (n > 0) {
-    FD_ZERO(&wfd);
-    FD_SET(cmdfd, &wfd);
-    tv.tv_sec = 0;
-    tv.tv_nsec = 0;
-
-    /* Check if we can write. */
-    if (pselect(cmdfd + 1, NULL, &wfd, NULL, &tv, NULL) < 0) {
-      if (errno == EINTR)
-        continue;
-      die("select failed: %s\n", strerror(errno));
-    }
-    if (!FD_ISSET(cmdfd, &wfd)) {
-      /* No, then free some buffer space. */
-      ttyread();
-    } else {
-      /*
-       * Only write 256 bytes at maximum. This seems to be a
-       * reasonable value for a serial line. Bigger values
-       * might clog the I/O.
-       */
-      r = write(cmdfd, s, (n < 256) ? n : 256);
-      if (r < 0) {
-        die("write error on tty: %s\n", strerror(errno));
-      }
-      if (r < n) {
-        /*
-         * We weren't able to write out everything.
-         * This means the buffer is getting full
-         * again. Empty it.
-         */
-        ttyread();
-        n -= r;
-        s += r;
-      } else {
-        /* All bytes have been written. */
-        break;
-      }
-    }
-  }
-}
-
-void ttysend(char *s, size_t n) {
-  int len;
-  Rune u;
-
-  ttywrite(s, n);
-  if (IS_SET(MODE_ECHO))
-    while ((len = utf8decode(s, &u, n)) > 0) {
-      techo(u);
-      n -= len;
-      s += len;
-    }
-}
-
-void ttyresize(void) {
-  struct winsize w;
-
-  w.ws_row = term.row;
-  w.ws_col = term.col;
-  w.ws_xpixel = wl.tw;
-  w.ws_ypixel = wl.th;
-  if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
-    fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
-}
-
-int tattrset(int attr) {
-  int i, j;
-
-  for (i = 0; i < term.row - 1; i++) {
-    for (j = 0; j < term.col - 1; j++) {
-      if (term.line[i][j].mode & attr)
-        return 1;
-    }
-  }
-
-  return 0;
-}
-
-void tsetdirt(int top, int bot) {
-  int i;
-
-  LIMIT(top, 0, term.row - 1);
-  LIMIT(bot, 0, term.row - 1);
-
-  for (i = top; i <= bot; i++)
-    term.dirty[i] = 1;
-
-  needdraw = true;
-}
-
-void tsetdirtattr(int attr) {
-  int i, j;
-
-  for (i = 0; i < term.row - 1; i++) {
-    for (j = 0; j < term.col - 1; j++) {
-      if (term.line[i][j].mode & attr) {
-        tsetdirt(i, i);
-        break;
-      }
-    }
-  }
-}
-
-void tfulldirt(void) { tsetdirt(0, term.row - 1); }
-
-void tcursor(int mode) {
-  static TCursor c[2];
-  int alt = IS_SET(MODE_ALTSCREEN);
-
-  if (mode == CURSOR_SAVE) {
-    c[alt] = term.c;
-  } else if (mode == CURSOR_LOAD) {
-    term.c = c[alt];
-    tmoveto(c[alt].x, c[alt].y);
-  }
-}
-
-void treset(void) {
-  uint i;
-
-  term.c = (TCursor){{.mode = ATTR_NULL, .fg = defaultfg, .bg = defaultbg},
-                     .x = 0,
-                     .y = 0,
-                     .state = CURSOR_DEFAULT};
-
-  memset(term.tabs, 0, term.col * sizeof(*term.tabs));
-  for (i = tabspaces; i < term.col; i += tabspaces)
-    term.tabs[i] = 1;
-  term.top = 0;
-  term.bot = term.row - 1;
-  term.mode = MODE_WRAP;
-  memset(term.trantbl, CS_USA, sizeof(term.trantbl));
-  term.charset = 0;
-
-  for (i = 0; i < 2; i++) {
-    tmoveto(0, 0);
-    tcursor(CURSOR_SAVE);
-    tclearregion(0, 0, term.col - 1, term.row - 1);
-    tswapscreen();
-  }
-}
-
-void tnew(int col, int row) {
-  term = (Term){.c = {.attr = {.fg = defaultfg, .bg = defaultbg}}};
-  tresize(col, row);
-  term.numlock = 1;
-
-  treset();
-}
-
-void tswapscreen(void) {
-  Line *tmp = term.line;
-
-  term.line = term.alt;
-  term.alt = tmp;
-  term.mode ^= MODE_ALTSCREEN;
-  tfulldirt();
-}
-
-void tscrolldown(int orig, int n) {
-  int i;
-  Line temp;
-
-  LIMIT(n, 0, term.bot - orig + 1);
-
-  tsetdirt(orig, term.bot - n);
-  tclearregion(0, term.bot - n + 1, term.col - 1, term.bot);
-
-  for (i = term.bot; i >= orig + n; i--) {
-    temp = term.line[i];
-    term.line[i] = term.line[i - n];
-    term.line[i - n] = temp;
-  }
-
-  selscroll(orig, n);
-}
-
-void tscrollup(int orig, int n) {
-  int i;
-  Line temp;
-
-  LIMIT(n, 0, term.bot - orig + 1);
-
-  tclearregion(0, orig, term.col - 1, orig + n - 1);
-  tsetdirt(orig + n, term.bot);
-
-  for (i = orig; i <= term.bot - n; i++) {
-    temp = term.line[i];
-    term.line[i] = term.line[i + n];
-    term.line[i + n] = temp;
-  }
-
-  selscroll(orig, -n);
-}
-
-void selscroll(int orig, int n) {
-  if (sel.ob.x == -1)
-    return;
-
-  if (BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
-    if ((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
-      selclear();
-      return;
-    }
-    if (sel.type == SEL_RECTANGULAR) {
-      if (sel.ob.y < term.top)
-        sel.ob.y = term.top;
-      if (sel.oe.y > term.bot)
-        sel.oe.y = term.bot;
-    } else {
-      if (sel.ob.y < term.top) {
-        sel.ob.y = term.top;
-        sel.ob.x = 0;
-      }
-      if (sel.oe.y > term.bot) {
-        sel.oe.y = term.bot;
-        sel.oe.x = term.col;
-      }
-    }
-    selnormalize();
-  }
-}
-
-void tnewline(int first_col) {
-  int y = term.c.y;
-
-  if (y == term.bot) {
-    tscrollup(term.top, 1);
-  } else {
-    y++;
-  }
-  tmoveto(first_col ? 0 : term.c.x, y);
-}
-
-void csiparse(void) {
-  char *p = csiescseq.buf, *np;
-  long int v;
-
-  csiescseq.narg = 0;
-  if (*p == '?') {
-    csiescseq.priv = 1;
-    p++;
-  }
-
-  csiescseq.buf[csiescseq.len] = '\0';
-  while (p < csiescseq.buf + csiescseq.len) {
-    np = NULL;
-    v = strtol(p, &np, 10);
-    if (np == p)
-      v = 0;
-    if (v == LONG_MAX || v == LONG_MIN)
-      v = -1;
-    csiescseq.arg[csiescseq.narg++] = v;
-    p = np;
-    if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
-      break;
-    p++;
-  }
-  csiescseq.mode[0] = *p++;
-  csiescseq.mode[1] = (p < csiescseq.buf + csiescseq.len) ? *p : '\0';
-}
-
-/* for absolute user moves, when decom is set */
-void tmoveato(int x, int y) {
-  tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top : 0));
-}
-
-void tmoveto(int x, int y) {
-  int miny, maxy;
-
-  if (term.c.state & CURSOR_ORIGIN) {
-    miny = term.top;
-    maxy = term.bot;
-  } else {
-    miny = 0;
-    maxy = term.row - 1;
-  }
-  term.c.state &= ~CURSOR_WRAPNEXT;
-  term.c.x = LIMIT(x, 0, term.col - 1);
-  term.c.y = LIMIT(y, miny, maxy);
-}
-
-void tsetchar(Rune u, Glyph *attr, int x, int y) {
-  static char *vt100_0[62] = {
-      /* 0x41 - 0x7e */
-      "↑", "↓", "→", "←", "█", "▚", "☃",      /* A - G */
-      0,   0,   0,   0,   0,   0,   0,   0,   /* H - O */
-      0,   0,   0,   0,   0,   0,   0,   0,   /* P - W */
-      0,   0,   0,   0,   0,   0,   0,   " ", /* X - _ */
-      "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
-      "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
-      "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
-      "│", "≤", "≥", "π", "≠", "£", "·",      /* x - ~ */
-  };
-
-  /*
-   * The table is proudly stolen from rxvt.
-   */
-  if (term.trantbl[term.charset] == CS_GRAPHIC0 && BETWEEN(u, 0x41, 0x7e) &&
-      vt100_0[u - 0x41])
-    utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
-
-  if (term.line[y][x].mode & ATTR_WIDE) {
-    if (x + 1 < term.col) {
-      term.line[y][x + 1].u = ' ';
-      term.line[y][x + 1].mode &= ~ATTR_WDUMMY;
-    }
-  } else if (term.line[y][x].mode & ATTR_WDUMMY) {
-    term.line[y][x - 1].u = ' ';
-    term.line[y][x - 1].mode &= ~ATTR_WIDE;
-  }
-
-  term.dirty[y] = 1;
-  term.line[y][x] = *attr;
-  term.line[y][x].u = u;
-}
-
-void tclearregion(int x1, int y1, int x2, int y2) {
-  int x, y, temp;
-  Glyph *gp;
-
-  if (x1 > x2)
-    temp = x1, x1 = x2, x2 = temp;
-  if (y1 > y2)
-    temp = y1, y1 = y2, y2 = temp;
-
-  LIMIT(x1, 0, term.col - 1);
-  LIMIT(x2, 0, term.col - 1);
-  LIMIT(y1, 0, term.row - 1);
-  LIMIT(y2, 0, term.row - 1);
-
-  for (y = y1; y <= y2; y++) {
-    term.dirty[y] = 1;
-    for (x = x1; x <= x2; x++) {
-      gp = &term.line[y][x];
-      if (selected(x, y))
-        selclear();
-      gp->fg = term.c.attr.fg;
-      gp->bg = term.c.attr.bg;
-      gp->mode = 0;
-      gp->u = ' ';
-    }
-  }
-}
-
-void tdeletechar(int n) {
-  int dst, src, size;
-  Glyph *line;
-
-  LIMIT(n, 0, term.col - term.c.x);
-
-  dst = term.c.x;
-  src = term.c.x + n;
-  size = term.col - src;
-  line = term.line[term.c.y];
-
-  memmove(&line[dst], &line[src], size * sizeof(Glyph));
-  tclearregion(term.col - n, term.c.y, term.col - 1, term.c.y);
-}
-
-void tinsertblank(int n) {
-  int dst, src, size;
-  Glyph *line;
-
-  LIMIT(n, 0, term.col - term.c.x);
-
-  dst = term.c.x + n;
-  src = term.c.x;
-  size = term.col - dst;
-  line = term.line[term.c.y];
-
-  memmove(&line[dst], &line[src], size * sizeof(Glyph));
-  tclearregion(src, term.c.y, dst - 1, term.c.y);
-}
-
-void tinsertblankline(int n) {
-  if (BETWEEN(term.c.y, term.top, term.bot))
-    tscrolldown(term.c.y, n);
-}
-
-void tdeleteline(int n) {
-  if (BETWEEN(term.c.y, term.top, term.bot))
-    tscrollup(term.c.y, n);
-}
-
-uint32_t tdefcolor(int *attr, int *npar, int l) {
-  int32_t idx = -1;
-  uint r, g, b;
-
-  switch (attr[*npar + 1]) {
-  case 2: /* direct color in RGB space */
-    if (*npar + 4 >= l) {
-      fprintf(stderr, "erresc(38): Incorrect number of parameters (%d)\n",
-              *npar);
-      break;
-    }
-    r = attr[*npar + 2];
-    g = attr[*npar + 3];
-    b = attr[*npar + 4];
-    *npar += 4;
-    if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
-      fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n", r, g, b);
-    else
-      idx = TRUECOLOR(r, g, b);
-    break;
-  case 5: /* indexed color */
-    if (*npar + 2 >= l) {
-      fprintf(stderr, "erresc(38): Incorrect number of parameters (%d)\n",
-              *npar);
-      break;
-    }
-    *npar += 2;
-    if (!BETWEEN(attr[*npar], 0, 255))
-      fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
-    else
-      idx = attr[*npar];
-    break;
-  case 0: /* implemented defined (only foreground) */
-  case 1: /* transparent */
-  case 3: /* direct color in CMY space */
-  case 4: /* direct color in CMYK space */
-  default:
-    fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[*npar]);
-    break;
-  }
-
-  return idx;
-}
-
-void tsetattr(int *attr, int l) {
-  int i;
-  uint32_t idx;
-
-  for (i = 0; i < l; i++) {
-    switch (attr[i]) {
-    case 0:
-      term.c.attr.mode &=
-          ~(ATTR_BOLD | ATTR_FAINT | ATTR_ITALIC | ATTR_UNDERLINE | ATTR_BLINK |
-            ATTR_REVERSE | ATTR_INVISIBLE | ATTR_STRUCK);
-      term.c.attr.fg = defaultfg;
-      term.c.attr.bg = defaultbg;
-      break;
-    case 1:
-      term.c.attr.mode |= ATTR_BOLD;
-      break;
-    case 2:
-      term.c.attr.mode |= ATTR_FAINT;
-      break;
-    case 3:
-      term.c.attr.mode |= ATTR_ITALIC;
-      break;
-    case 4:
-      term.c.attr.mode |= ATTR_UNDERLINE;
-      break;
-    case 5: /* slow blink */
-            /* FALLTHROUGH */
-    case 6: /* rapid blink */
-      term.c.attr.mode |= ATTR_BLINK;
-      break;
-    case 7:
-      term.c.attr.mode |= ATTR_REVERSE;
-      break;
-    case 8:
-      term.c.attr.mode |= ATTR_INVISIBLE;
-      break;
-    case 9:
-      term.c.attr.mode |= ATTR_STRUCK;
-      break;
-    case 22:
-      term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
-      break;
-    case 23:
-      term.c.attr.mode &= ~ATTR_ITALIC;
-      break;
-    case 24:
-      term.c.attr.mode &= ~ATTR_UNDERLINE;
-      break;
-    case 25:
-      term.c.attr.mode &= ~ATTR_BLINK;
-      break;
-    case 27:
-      term.c.attr.mode &= ~ATTR_REVERSE;
-      break;
-    case 28:
-      term.c.attr.mode &= ~ATTR_INVISIBLE;
-      break;
-    case 29:
-      term.c.attr.mode &= ~ATTR_STRUCK;
-      break;
-    case 38:
-      if ((idx = tdefcolor(attr, &i, l)) >= 0)
-        term.c.attr.fg = idx;
-      break;
-    case 39:
-      term.c.attr.fg = defaultfg;
-      break;
-    case 48:
-      if ((idx = tdefcolor(attr, &i, l)) >= 0)
-        term.c.attr.bg = idx;
-      break;
-    case 49:
-      term.c.attr.bg = defaultbg;
-      break;
-    default:
-      if (BETWEEN(attr[i], 30, 37)) {
-        term.c.attr.fg = attr[i] - 30;
-      } else if (BETWEEN(attr[i], 40, 47)) {
-        term.c.attr.bg = attr[i] - 40;
-      } else if (BETWEEN(attr[i], 90, 97)) {
-        term.c.attr.fg = attr[i] - 90 + 8;
-      } else if (BETWEEN(attr[i], 100, 107)) {
-        term.c.attr.bg = attr[i] - 100 + 8;
-      } else {
-        fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]),
-            csidump();
-      }
-      break;
-    }
-  }
-}
-
-void tsetscroll(int t, int b) {
-  int temp;
-
-  LIMIT(t, 0, term.row - 1);
-  LIMIT(b, 0, term.row - 1);
-  if (t > b) {
-    temp = t;
-    t = b;
-    b = temp;
-  }
-  term.top = t;
-  term.bot = b;
-}
-
-void tsetmode(int priv, int set, int *args, int narg) {
-  int *lim, mode;
-  int alt;
-
-  for (lim = args + narg; args < lim; ++args) {
-    if (priv) {
-      switch (*args) {
-      case 1: /* DECCKM -- Cursor key */
-        MODBIT(term.mode, set, MODE_APPCURSOR);
-        break;
-      case 5: /* DECSCNM -- Reverse video */
-        mode = term.mode;
-        MODBIT(term.mode, set, MODE_REVERSE);
-        if (mode != term.mode)
-          redraw();
-        break;
-      case 6: /* DECOM -- Origin */
-        MODBIT(term.c.state, set, CURSOR_ORIGIN);
-        tmoveato(0, 0);
-        break;
-      case 7: /* DECAWM -- Auto wrap */
-        MODBIT(term.mode, set, MODE_WRAP);
-        break;
-      case 0:  /* Error (IGNORED) */
-      case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
-      case 3:  /* DECCOLM -- Column  (IGNORED) */
-      case 4:  /* DECSCLM -- Scroll (IGNORED) */
-      case 8:  /* DECARM -- Auto repeat (IGNORED) */
-      case 18: /* DECPFF -- Printer feed (IGNORED) */
-      case 19: /* DECPEX -- Printer extent (IGNORED) */
-      case 42: /* DECNRCM -- National characters (IGNORED) */
-      case 12: /* att610 -- Start blinking cursor (IGNORED) */
-        break;
-      case 25: /* DECTCEM -- Text Cursor Enable Mode */
-        MODBIT(term.mode, !set, MODE_HIDE);
-        break;
-      case 9: /* X10 mouse compatibility mode */
-        MODBIT(term.mode, 0, MODE_MOUSE);
-        MODBIT(term.mode, set, MODE_MOUSEX10);
-        break;
-      case 1000: /* 1000: report button press */
-        MODBIT(term.mode, 0, MODE_MOUSE);
-        MODBIT(term.mode, set, MODE_MOUSEBTN);
-        break;
-      case 1002: /* 1002: report motion on button press */
-        MODBIT(term.mode, 0, MODE_MOUSE);
-        MODBIT(term.mode, set, MODE_MOUSEMOTION);
-        break;
-      case 1003: /* 1003: enable all mouse motions */
-        MODBIT(term.mode, 0, MODE_MOUSE);
-        MODBIT(term.mode, set, MODE_MOUSEMANY);
-        break;
-      case 1004: /* 1004: send focus events to tty */
-        MODBIT(term.mode, set, MODE_FOCUS);
-        break;
-      case 1006: /* 1006: extended reporting mode */
-        MODBIT(term.mode, set, MODE_MOUSESGR);
-        break;
-      case 1034:
-        MODBIT(term.mode, set, MODE_8BIT);
-        break;
-      case 1049: /* swap screen & set/restore cursor as xterm */
-        if (!allowaltscreen)
-          break;
-        tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
-        /* FALLTHROUGH */
-      case 47: /* swap screen */
-      case 1047:
-        if (!allowaltscreen)
-          break;
-        alt = IS_SET(MODE_ALTSCREEN);
-        if (alt) {
-          tclearregion(0, 0, term.col - 1, term.row - 1);
-        }
-        if (set ^ alt) /* set is always 1 or 0 */
-          tswapscreen();
-        if (*args != 1049)
-          break;
-        /* FALLTHROUGH */
-      case 1048:
-        tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
-        break;
-      case 2004: /* 2004: bracketed paste mode */
-        MODBIT(term.mode, set, MODE_BRCKTPASTE);
-        break;
-      /* Not implemented mouse modes. See comments there. */
-      case 1001: /* mouse highlight mode; can hang the
-              terminal by design when implemented. */
-      case 1005: /* UTF-8 mouse mode; will confuse
-              applications not supporting UTF-8
-              and luit. */
-      case 1015: /* urxvt mangled mouse mode; incompatible
-              and can be mistaken for other control
-              codes. */
-      default:
-        fprintf(stderr, "erresc: unknown private set/reset mode %d\n", *args);
-        break;
-      }
-    } else {
-      switch (*args) {
-      case 0: /* Error (IGNORED) */
-        break;
-      case 2: /* KAM -- keyboard action */
-        MODBIT(term.mode, set, MODE_KBDLOCK);
-        break;
-      case 4: /* IRM -- Insertion-replacement */
-        MODBIT(term.mode, set, MODE_INSERT);
-        break;
-      case 12: /* SRM -- Send/Receive */
-        MODBIT(term.mode, !set, MODE_ECHO);
-        break;
-      case 20: /* LNM -- Linefeed/new line */
-        MODBIT(term.mode, set, MODE_CRLF);
-        break;
-      default:
-        fprintf(stderr, "erresc: unknown set/reset mode %d\n", *args);
-        break;
-      }
-    }
-  }
-}
-
-void csihandle(void) {
-  char buf[40];
-  int len;
-
-  switch (csiescseq.mode[0]) {
-  default:
-  unknown:
-    fprintf(stderr, "erresc: unknown csi ");
-    csidump();
-    /* die(""); */
-    break;
-  case '@': /* ICH -- Insert <n> blank char */
-    DEFAULT(csiescseq.arg[0], 1);
-    tinsertblank(csiescseq.arg[0]);
-    break;
-  case 'A': /* CUU -- Cursor <n> Up */
-    DEFAULT(csiescseq.arg[0], 1);
-    tmoveto(term.c.x, term.c.y - csiescseq.arg[0]);
-    break;
-  case 'B': /* CUD -- Cursor <n> Down */
-  case 'e': /* VPR --Cursor <n> Down */
-    DEFAULT(csiescseq.arg[0], 1);
-    tmoveto(term.c.x, term.c.y + csiescseq.arg[0]);
-    break;
-  case 'i': /* MC -- Media Copy */
-    switch (csiescseq.arg[0]) {
-    case 0:
-      tdump();
-      break;
-    case 1:
-      tdumpline(term.c.y);
-      break;
-    case 2:
-      tdumpsel();
-      break;
-    case 4:
-      term.mode &= ~MODE_PRINT;
-      break;
-    case 5:
-      term.mode |= MODE_PRINT;
-      break;
-    }
-    break;
-  case 'c': /* DA -- Device Attributes */
-    if (csiescseq.arg[0] == 0)
-      ttywrite(vtiden, sizeof(vtiden) - 1);
-    break;
-  case 'C': /* CUF -- Cursor <n> Forward */
-  case 'a': /* HPR -- Cursor <n> Forward */
-    DEFAULT(csiescseq.arg[0], 1);
-    tmoveto(term.c.x + csiescseq.arg[0], term.c.y);
-    break;
-  case 'D': /* CUB -- Cursor <n> Backward */
-    DEFAULT(csiescseq.arg[0], 1);
-    tmoveto(term.c.x - csiescseq.arg[0], term.c.y);
-    break;
-  case 'E': /* CNL -- Cursor <n> Down and first col */
-    DEFAULT(csiescseq.arg[0], 1);
-    tmoveto(0, term.c.y + csiescseq.arg[0]);
-    break;
-  case 'F': /* CPL -- Cursor <n> Up and first col */
-    DEFAULT(csiescseq.arg[0], 1);
-    tmoveto(0, term.c.y - csiescseq.arg[0]);
-    break;
-  case 'g': /* TBC -- Tabulation clear */
-    switch (csiescseq.arg[0]) {
-    case 0: /* clear current tab stop */
-      term.tabs[term.c.x] = 0;
-      break;
-    case 3: /* clear all the tabs */
-      memset(term.tabs, 0, term.col * sizeof(*term.tabs));
-      break;
-    default:
-      goto unknown;
-    }
-    break;
-  case 'G': /* CHA -- Move to <col> */
-  case '`': /* HPA */
-    DEFAULT(csiescseq.arg[0], 1);
-    tmoveto(csiescseq.arg[0] - 1, term.c.y);
-    break;
-  case 'H': /* CUP -- Move to <row> <col> */
-  case 'f': /* HVP */
-    DEFAULT(csiescseq.arg[0], 1);
-    DEFAULT(csiescseq.arg[1], 1);
-    tmoveato(csiescseq.arg[1] - 1, csiescseq.arg[0] - 1);
-    break;
-  case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
-    DEFAULT(csiescseq.arg[0], 1);
-    tputtab(csiescseq.arg[0]);
-    break;
-  case 'J': /* ED -- Clear screen */
-    selclear();
-    switch (csiescseq.arg[0]) {
-    case 0: /* below */
-      tclearregion(term.c.x, term.c.y, term.col - 1, term.c.y);
-      if (term.c.y < term.row - 1) {
-        tclearregion(0, term.c.y + 1, term.col - 1, term.row - 1);
-      }
-      break;
-    case 1: /* above */
-      if (term.c.y > 1)
-        tclearregion(0, 0, term.col - 1, term.c.y - 1);
-      tclearregion(0, term.c.y, term.c.x, term.c.y);
-      break;
-    case 2: /* all */
-      tclearregion(0, 0, term.col - 1, term.row - 1);
-      break;
-    default:
-      goto unknown;
-    }
-    break;
-  case 'K': /* EL -- Clear line */
-    switch (csiescseq.arg[0]) {
-    case 0: /* right */
-      tclearregion(term.c.x, term.c.y, term.col - 1, term.c.y);
-      break;
-    case 1: /* left */
-      tclearregion(0, term.c.y, term.c.x, term.c.y);
-      break;
-    case 2: /* all */
-      tclearregion(0, term.c.y, term.col - 1, term.c.y);
-      break;
-    }
-    break;
-  case 'S': /* SU -- Scroll <n> line up */
-    DEFAULT(csiescseq.arg[0], 1);
-    tscrollup(term.top, csiescseq.arg[0]);
-    break;
-  case 'T': /* SD -- Scroll <n> line down */
-    DEFAULT(csiescseq.arg[0], 1);
-    tscrolldown(term.top, csiescseq.arg[0]);
-    break;
-  case 'L': /* IL -- Insert <n> blank lines */
-    DEFAULT(csiescseq.arg[0], 1);
-    tinsertblankline(csiescseq.arg[0]);
-    break;
-  case 'l': /* RM -- Reset Mode */
-    tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
-    break;
-  case 'M': /* DL -- Delete <n> lines */
-    DEFAULT(csiescseq.arg[0], 1);
-    tdeleteline(csiescseq.arg[0]);
-    break;
-  case 'X': /* ECH -- Erase <n> char */
-    DEFAULT(csiescseq.arg[0], 1);
-    tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0] - 1, term.c.y);
-    break;
-  case 'P': /* DCH -- Delete <n> char */
-    DEFAULT(csiescseq.arg[0], 1);
-    tdeletechar(csiescseq.arg[0]);
-    break;
-  case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
-    DEFAULT(csiescseq.arg[0], 1);
-    tputtab(-csiescseq.arg[0]);
-    break;
-  case 'd': /* VPA -- Move to <row> */
-    DEFAULT(csiescseq.arg[0], 1);
-    tmoveato(term.c.x, csiescseq.arg[0] - 1);
-    break;
-  case 'h': /* SM -- Set terminal mode */
-    tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
-    break;
-  case 'm': /* SGR -- Terminal attribute (color) */
-    tsetattr(csiescseq.arg, csiescseq.narg);
-    break;
-  case 'n': /* DSR – Device Status Report (cursor position) */
-    if (csiescseq.arg[0] == 6) {
-      len =
-          snprintf(buf, sizeof(buf), "\033[%i;%iR", term.c.y + 1, term.c.x + 1);
-      ttywrite(buf, len);
-    }
-    break;
-  case 'r': /* DECSTBM -- Set Scrolling Region */
-    if (csiescseq.priv) {
-      goto unknown;
-    } else {
-      DEFAULT(csiescseq.arg[0], 1);
-      DEFAULT(csiescseq.arg[1], term.row);
-      tsetscroll(csiescseq.arg[0] - 1, csiescseq.arg[1] - 1);
-      tmoveato(0, 0);
-    }
-    break;
-  case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
-    tcursor(CURSOR_SAVE);
-    break;
-  case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
-    tcursor(CURSOR_LOAD);
-    break;
-  case ' ':
-    switch (csiescseq.mode[1]) {
-    case 'q': /* DECSCUSR -- Set Cursor Style */
-      DEFAULT(csiescseq.arg[0], 1);
-      if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
-        goto unknown;
-      }
-      wl.cursor = csiescseq.arg[0];
-      break;
-    default:
-      goto unknown;
-    }
-    break;
-  }
-}
-
-void csidump(void) {
-  int i;
-  uint c;
-
-  printf("ESC[");
-  for (i = 0; i < csiescseq.len; i++) {
-    c = csiescseq.buf[i] & 0xff;
-    if (isprint(c)) {
-      putchar(c);
-    } else if (c == '\n') {
-      printf("(\\n)");
-    } else if (c == '\r') {
-      printf("(\\r)");
-    } else if (c == 0x1b) {
-      printf("(\\e)");
-    } else {
-      printf("(%02x)", c);
-    }
-  }
-  putchar('\n');
-}
-
-void csireset(void) { memset(&csiescseq, 0, sizeof(csiescseq)); }
-
-void strhandle(void) {
-  char *p = NULL;
-  int j, narg, par;
-
-  term.esc &= ~(ESC_STR_END | ESC_STR);
-  strparse();
-  par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
-
-  switch (strescseq.type) {
-  case ']': /* OSC -- Operating System Command */
-    switch (par) {
-    case 0:
-    case 1:
-    case 2:
-      if (narg > 1)
-        wlsettitle(strescseq.args[1]);
-      return;
-    case 4: /* color set */
-      if (narg < 3)
-        break;
-      p = strescseq.args[2];
-      /* FALLTHROUGH */
-    case 104: /* color reset, here p = NULL */
-      j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
-      if (wlsetcolorname(j, p)) {
-        fprintf(stderr, "erresc: invalid color %s\n", p);
-      } else {
-        /*
-         * TODO if defaultbg color is changed, borders
-         * are dirty
-         */
-        redraw();
-      }
-      return;
-    }
-    break;
-  case 'k': /* old title set compatibility */
-    wlsettitle(strescseq.args[0]);
-    return;
-  case 'P': /* DCS -- Device Control String */
-  case '_': /* APC -- Application Program Command */
-  case '^': /* PM -- Privacy Message */
-    return;
-  }
-
-  fprintf(stderr, "erresc: unknown str ");
-  strdump();
-}
-
-void strparse(void) {
-  int c;
-  char *p = strescseq.buf;
-
-  strescseq.narg = 0;
-  strescseq.buf[strescseq.len] = '\0';
-
-  if (*p == '\0')
-    return;
-
-  while (strescseq.narg < STR_ARG_SIZ) {
-    strescseq.args[strescseq.narg++] = p;
-    while ((c = *p) != ';' && c != '\0')
-      ++p;
-    if (c == '\0')
-      return;
-    *p++ = '\0';
-  }
-}
-
-void strdump(void) {
-  int i;
-  uint c;
-
-  printf("ESC%c", strescseq.type);
-  for (i = 0; i < strescseq.len; i++) {
-    c = strescseq.buf[i] & 0xff;
-    if (c == '\0') {
-      return;
-    } else if (isprint(c)) {
-      putchar(c);
-    } else if (c == '\n') {
-      printf("(\\n)");
-    } else if (c == '\r') {
-      printf("(\\r)");
-    } else if (c == 0x1b) {
-      printf("(\\e)");
-    } else {
-      printf("(%02x)", c);
-    }
-  }
-  printf("ESC\\\n");
-}
-
-void strreset(void) { memset(&strescseq, 0, sizeof(strescseq)); }
-
-void tprinter(char *s, size_t len) {
-  if (iofd != -1 && xwrite(iofd, s, len) < 0) {
-    fprintf(stderr, "Error writing in %s:%s\n", opt_io, strerror(errno));
-    close(iofd);
-    iofd = -1;
-  }
-}
-
-void toggleprinter(const Arg *arg) { term.mode ^= MODE_PRINT; }
-
-void printscreen(const Arg *arg) { tdump(); }
-
-void printsel(const Arg *arg) { tdumpsel(); }
-
-void tdumpsel(void) {
-  char *ptr;
-
-  if ((ptr = getsel())) {
-    tprinter(ptr, strlen(ptr));
-    free(ptr);
-  }
-}
-
-void tdumpline(int n) {
-  char buf[UTF_SIZ];
-  Glyph *bp, *end;
-
-  bp = &term.line[n][0];
-  end = &bp[MIN(tlinelen(n), term.col) - 1];
-  if (bp != end || bp->u != ' ') {
-    for (; bp <= end; ++bp)
-      tprinter(buf, utf8encode(bp->u, buf));
-  }
-  tprinter("\n", 1);
-}
-
-void tdump(void) {
-  int i;
-
-  for (i = 0; i < term.row; ++i)
-    tdumpline(i);
-}
-
-void tputtab(int n) {
-  uint x = term.c.x;
-
-  if (n > 0) {
-    while (x < term.col && n--)
-      for (++x; x < term.col && !term.tabs[x]; ++x)
-        /* nothing */;
-  } else if (n < 0) {
-    while (x > 0 && n++)
-      for (--x; x > 0 && !term.tabs[x]; --x)
-        /* nothing */;
-  }
-  term.c.x = LIMIT(x, 0, term.col - 1);
-}
-
-void techo(Rune u) {
-  if (ISCONTROL(u)) { /* control code */
-    if (u & 0x80) {
-      u &= 0x7f;
-      tputc('^');
-      tputc('[');
-    } else if (u != '\n' && u != '\r' && u != '\t') {
-      u ^= 0x40;
-      tputc('^');
-    }
-  }
-  tputc(u);
-  needdraw = true;
-}
-
-void tdeftran(char ascii) {
-  static char cs[] = "0B";
-  static int vcs[] = {CS_GRAPHIC0, CS_USA};
-  char *p;
-
-  if ((p = strchr(cs, ascii)) == NULL) {
-    fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
-  } else {
-    term.trantbl[term.icharset] = vcs[p - cs];
-  }
-}
-
-void tdectest(char c) {
-  int x, y;
-
-  if (c == '8') { /* DEC screen alignment test. */
-    for (x = 0; x < term.col; ++x) {
-      for (y = 0; y < term.row; ++y)
-        tsetchar('E', &term.c.attr, x, y);
-    }
-  }
-}
-
-void tstrsequence(uchar c) {
-  switch (c) {
-  case 0x90: /* DCS -- Device Control String */
-    c = 'P';
-    break;
-  case 0x9f: /* APC -- Application Program Command */
-    c = '_';
-    break;
-  case 0x9e: /* PM -- Privacy Message */
-    c = '^';
-    break;
-  case 0x9d: /* OSC -- Operating System Command */
-    c = ']';
-    break;
-  }
-  strreset();
-  strescseq.type = c;
-  term.esc |= ESC_STR;
-}
-
-void tcontrolcode(uchar ascii) {
-  switch (ascii) {
-  case '\t': /* HT */
-    tputtab(1);
-    return;
-  case '\b': /* BS */
-    tmoveto(term.c.x - 1, term.c.y);
-    return;
-  case '\r': /* CR */
-    tmoveto(0, term.c.y);
-    return;
-  case '\f': /* LF */
-  case '\v': /* VT */
-  case '\n': /* LF */
-    /* go to first col if the mode is set */
-    tnewline(IS_SET(MODE_CRLF));
-    return;
-  case '\a': /* BEL */
-    if (term.esc & ESC_STR_END) {
-      /* backwards compatibility to xterm */
-      strhandle();
-    } else {
-      if (!(wl.state & WIN_FOCUSED))
-        wlseturgency(1);
-      /* XXX: No bell on wayland
-       * if (bellvolume)
-       *     XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
-       */
-    }
-    break;
-  case '\033': /* ESC */
-    csireset();
-    term.esc &= ~(ESC_CSI | ESC_ALTCHARSET | ESC_TEST);
-    term.esc |= ESC_START;
-    return;
-  case '\016': /* SO (LS1 -- Locking shift 1) */
-  case '\017': /* SI (LS0 -- Locking shift 0) */
-    term.charset = 1 - (ascii - '\016');
-    return;
-  case '\032': /* SUB */
-    tsetchar('?', &term.c.attr, term.c.x, term.c.y);
-  case '\030': /* CAN */
-    csireset();
-    break;
-  case '\005': /* ENQ (IGNORED) */
-  case '\000': /* NUL (IGNORED) */
-  case '\021': /* XON (IGNORED) */
-  case '\023': /* XOFF (IGNORED) */
-  case 0177:   /* DEL (IGNORED) */
-    return;
-  case 0x84: /* TODO: IND */
-    break;
-  case 0x85:     /* NEL -- Next line */
-    tnewline(1); /* always go to first col */
-    break;
-  case 0x88: /* HTS -- Horizontal tab stop */
-    term.tabs[term.c.x] = 1;
-    break;
-  case 0x8d: /* TODO: RI */
-  case 0x8e: /* TODO: SS2 */
-  case 0x8f: /* TODO: SS3 */
-  case 0x98: /* TODO: SOS */
-    break;
-  case 0x9a: /* DECID -- Identify Terminal */
-    ttywrite(vtiden, sizeof(vtiden) - 1);
-    break;
-  case 0x9b: /* TODO: CSI */
-  case 0x9c: /* TODO: ST */
-    break;
-  case 0x90: /* DCS -- Device Control String */
-  case 0x9f: /* APC -- Application Program Command */
-  case 0x9e: /* PM -- Privacy Message */
-  case 0x9d: /* OSC -- Operating System Command */
-    tstrsequence(ascii);
-    return;
-  }
-  /* only CAN, SUB, \a and C1 chars interrupt a sequence */
-  term.esc &= ~(ESC_STR_END | ESC_STR);
-}
-
-/*
- * returns 1 when the sequence is finished and it hasn't to read
- * more characters for this sequence, otherwise 0
- */
-int eschandle(uchar ascii) {
-  switch (ascii) {
-  case '[':
-    term.esc |= ESC_CSI;
-    return 0;
-  case '#':
-    term.esc |= ESC_TEST;
-    return 0;
-  case 'P': /* DCS -- Device Control String */
-  case '_': /* APC -- Application Program Command */
-  case '^': /* PM -- Privacy Message */
-  case ']': /* OSC -- Operating System Command */
-  case 'k': /* old title set compatibility */
-    tstrsequence(ascii);
-    return 0;
-  case 'n': /* LS2 -- Locking shift 2 */
-  case 'o': /* LS3 -- Locking shift 3 */
-    term.charset = 2 + (ascii - 'n');
-    break;
-  case '(': /* GZD4 -- set primary charset G0 */
-  case ')': /* G1D4 -- set secondary charset G1 */
-  case '*': /* G2D4 -- set tertiary charset G2 */
-  case '+': /* G3D4 -- set quaternary charset G3 */
-    term.icharset = ascii - '(';
-    term.esc |= ESC_ALTCHARSET;
-    return 0;
-  case 'D': /* IND -- Linefeed */
-    if (term.c.y == term.bot) {
-      tscrollup(term.top, 1);
-    } else {
-      tmoveto(term.c.x, term.c.y + 1);
-    }
-    break;
-  case 'E':      /* NEL -- Next line */
-    tnewline(1); /* always go to first col */
-    break;
-  case 'H': /* HTS -- Horizontal tab stop */
-    term.tabs[term.c.x] = 1;
-    break;
-  case 'M': /* RI -- Reverse index */
-    if (term.c.y == term.top) {
-      tscrolldown(term.top, 1);
-    } else {
-      tmoveto(term.c.x, term.c.y - 1);
-    }
-    break;
-  case 'Z': /* DECID -- Identify Terminal */
-    ttywrite(vtiden, sizeof(vtiden) - 1);
-    break;
-  case 'c': /* RIS -- Reset to inital state */
-    treset();
-    wlresettitle();
-    wlloadcols();
-    break;
-  case '=': /* DECPAM -- Application keypad */
-    term.mode |= MODE_APPKEYPAD;
-    break;
-  case '>': /* DECPNM -- Normal keypad */
-    term.mode &= ~MODE_APPKEYPAD;
-    break;
-  case '7': /* DECSC -- Save Cursor */
-    tcursor(CURSOR_SAVE);
-    break;
-  case '8': /* DECRC -- Restore Cursor */
-    tcursor(CURSOR_LOAD);
-    break;
-  case '\\': /* ST -- String Terminator */
-    if (term.esc & ESC_STR_END)
-      strhandle();
-    break;
-  default:
-    fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", (uchar)ascii,
-            isprint(ascii) ? ascii : '.');
-    break;
-  }
-  return 1;
-}
-
-void tputc(Rune u) {
-  char c[UTF_SIZ];
-  int control;
-  int width, len;
-  Glyph *gp;
-
-  control = ISCONTROL(u);
-  len = utf8encode(u, c);
-  if (!control && (width = wcwidth(u)) == -1) {
-    memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
-    width = 1;
-  }
-
-  if (IS_SET(MODE_PRINT))
-    tprinter(c, len);
-
-  /*
-   * STR sequence must be checked before anything else
-   * because it uses all following characters until it
-   * receives a ESC, a SUB, a ST or any other C1 control
-   * character.
-   */
-  if (term.esc & ESC_STR) {
-    if (u == '\a' || u == 030 || u == 032 || u == 033 || ISCONTROLC1(u)) {
-      term.esc &= ~(ESC_START | ESC_STR);
-      term.esc |= ESC_STR_END;
-    } else if (strescseq.len + len < sizeof(strescseq.buf) - 1) {
-      memmove(&strescseq.buf[strescseq.len], c, len);
-      strescseq.len += len;
-      return;
-    } else {
-      /*
-       * Here is a bug in terminals. If the user never sends
-       * some code to stop the str or esc command, then st
-       * will stop responding. But this is better than
-       * silently failing with unknown characters. At least
-       * then users will report back.
-       *
-       * In the case users ever get fixed, here is the code:
-       */
-      /*
-       * term.esc = 0;
-       * strhandle();
-       */
-      return;
-    }
-  }
-
-  /*
-   * Actions of control codes must be performed as soon they arrive
-   * because they can be embedded inside a control sequence, and
-   * they must not cause conflicts with sequences.
-   */
-  if (control) {
-    tcontrolcode(u);
-    /*
-     * control codes are not shown ever
-     */
-    return;
-  } else if (term.esc & ESC_START) {
-    if (term.esc & ESC_CSI) {
-      csiescseq.buf[csiescseq.len++] = u;
-      if (BETWEEN(u, 0x40, 0x7E) ||
-          csiescseq.len >= sizeof(csiescseq.buf) - 1) {
-        term.esc = 0;
-        csiparse();
-        csihandle();
-      }
-      return;
-    } else if (term.esc & ESC_ALTCHARSET) {
-      tdeftran(u);
-    } else if (term.esc & ESC_TEST) {
-      tdectest(u);
-    } else {
-      if (!eschandle(u))
-        return;
-      /* sequence already finished */
-    }
-    term.esc = 0;
-    /*
-     * All characters which form part of a sequence are not
-     * printed
-     */
-    return;
-  }
-  if (sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
-    selclear();
-
-  gp = &term.line[term.c.y][term.c.x];
-  if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
-    gp->mode |= ATTR_WRAP;
-    tnewline(1);
-    gp = &term.line[term.c.y][term.c.x];
-  }
-
-  if (IS_SET(MODE_INSERT) && term.c.x + width < term.col)
-    memmove(gp + width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
-
-  if (term.c.x + width > term.col) {
-    tnewline(1);
-    gp = &term.line[term.c.y][term.c.x];
-  }
-
-  tsetchar(u, &term.c.attr, term.c.x, term.c.y);
-
-  if (width == 2) {
-    gp->mode |= ATTR_WIDE;
-    if (term.c.x + 1 < term.col) {
-      gp[1].u = '\0';
-      gp[1].mode = ATTR_WDUMMY;
-    }
-  }
-  if (term.c.x + width < term.col) {
-    tmoveto(term.c.x + width, term.c.y);
-  } else {
-    term.c.state |= CURSOR_WRAPNEXT;
-  }
-}
-
-void tresize(int col, int row) {
-  int i;
-  int minrow = MIN(row, term.row);
-  int mincol = MIN(col, term.col);
-  int *bp;
-  TCursor c;
-
-  if (col < 1 || row < 1) {
-    fprintf(stderr, "tresize: error resizing to %dx%d\n", col, row);
-    return;
-  }
-
-  /*
-   * slide screen to keep cursor where we expect it -
-   * tscrollup would work here, but we can optimize to
-   * memmove because we're freeing the earlier lines
-   */
-  for (i = 0; i <= term.c.y - row; i++) {
-    free(term.line[i]);
-    free(term.alt[i]);
-  }
-  /* ensure that both src and dst are not NULL */
-  if (i > 0) {
-    memmove(term.line, term.line + i, row * sizeof(Line));
-    memmove(term.alt, term.alt + i, row * sizeof(Line));
-  }
-  for (i += row; i < term.row; i++) {
-    free(term.line[i]);
-    free(term.alt[i]);
-  }
-
-  /* resize to new height */
-  term.line = xrealloc(term.line, row * sizeof(Line));
-  term.alt = xrealloc(term.alt, row * sizeof(Line));
-  term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
-  term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
-
-  /* resize each row to new width, zero-pad if needed */
-  for (i = 0; i < minrow; i++) {
-    term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
-    term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
-  }
-
-  /* allocate any new rows */
-  for (/* i == minrow */; i < row; i++) {
-    term.line[i] = xmalloc(col * sizeof(Glyph));
-    term.alt[i] = xmalloc(col * sizeof(Glyph));
-  }
-  if (col > term.col) {
-    bp = term.tabs + term.col;
-
-    memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
-    while (--bp > term.tabs && !*bp)
-      /* nothing */;
-    for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
-      *bp = 1;
-  }
-  /* update terminal size */
-  term.col = col;
-  term.row = row;
-  /* reset scrolling region */
-  tsetscroll(0, row - 1);
-  /* make use of the LIMIT in tmoveto */
-  tmoveto(term.c.x, term.c.y);
-  /* Clearing both screens (it makes dirty all lines) */
-  c = term.c;
-  for (i = 0; i < 2; i++) {
-    if (mincol < col && 0 < minrow) {
-      tclearregion(mincol, 0, col - 1, minrow - 1);
-    }
-    if (0 < col && minrow < row) {
-      tclearregion(0, minrow, col - 1, row - 1);
-    }
-    tswapscreen();
-    tcursor(CURSOR_LOAD);
-  }
-  term.c = c;
-}
-
-void wlresize(int col, int row) {
-  union wld_object object;
-
-  wl.tw = MAX(1, col * wl.cw);
-  wl.th = MAX(1, row * wl.ch);
-
-  wld.oldbuffer = wld.buffer;
-  wld.buffer = wld_create_buffer(wld.ctx, wl.w, wl.h, WLD_FORMAT_ARGB8888, 0);
-
-  if (!wld.buffer)
-    die("failed to create buffer");
-  wld_export(wld.buffer, WLD_WAYLAND_OBJECT_BUFFER, &object);
-  wl.buffer = object.ptr;
-  if (wld.oldbuffer) {
-    wld_buffer_unreference(wld.oldbuffer);
-    wld.oldbuffer = 0;
-  }
-}
-
-uchar sixd_to_8bit(int x) { return x == 0 ? 0 : 0x37 + 0x28 * x; }
-
-int wlloadcolor(int i, const char *name, uint32_t *color) {
-  if (!name) {
-    if (BETWEEN(i, 16, 255)) {  /* 256 color */
-      if (i < 6 * 6 * 6 + 16) { /* same colors as xterm */
-        *color = 0xff << 24 | sixd_to_8bit(((i - 16) / 36) % 6) << 16 |
-                 sixd_to_8bit(((i - 16) / 6) % 6) << 8 |
-                 sixd_to_8bit(((i - 16) / 1) % 6);
-      } else { /* greyscale */
-        *color = 0xff << 24 | (0x8 + 0xa * (i - (6 * 6 * 6 + 16))) * 0x10101;
-      }
-      return true;
-    } else
-      name = colorname[i];
-  }
-
-  return wld_lookup_named_color(name, color);
-}
-
-void wlloadcols(void) {
-  int i;
-
-  for (i = 0; i < LEN(dc.col); i++)
-    if (!wlloadcolor(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);
-    }
-}
-
-int wlsetcolorname(int x, const char *name) {
-  uint32_t color;
-
-  if (!BETWEEN(x, 0, LEN(dc.col)))
-    return 1;
-
-  if (!wlloadcolor(x, name, &color))
-    return 1;
-
-  dc.col[x] = color;
-
-  return 0;
-}
-
-static void wlloadcursor(void) {
-  char *names[] = {mouseshape, "xterm", "ibeam", "text"};
-  int i;
-
-  cursor.theme = wl_cursor_theme_load(NULL, 32, wl.shm);
-
-  for (i = 0; !cursor.cursor && i < LEN(names); i++)
-    cursor.cursor = wl_cursor_theme_get_cursor(cursor.theme, names[i]);
-
-  cursor.surface = wl_compositor_create_surface(wl.cmp);
-}
-
-void wltermclear(int col1, int row1, int col2, int row2) {
-  uint32_t color = dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg];
-  color = (color & term_alpha << 24) | (color & 0x00FFFFFF);
-  wld_fill_rectangle(wld.renderer, color, borderpx + col1 * wl.cw,
-                     borderpx + row1 * wl.ch, (col2 - col1 + 1) * wl.cw,
-                     (row2 - row1 + 1) * wl.ch);
-}
-
-/*
- * Absolute coordinates.
- */
-void wlclear(int x1, int y1, int x2, int y2) {
-  uint32_t color = dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg];
-  color = (color & term_alpha << 24) | (color & 0x00FFFFFF);
-  wld_fill_rectangle(wld.renderer, color, x1, y1, x2 - x1, y2 - y1);
-}
-
-int wlloadfont(Font *f, FcPattern *pattern) {
-  FcPattern *match;
-  FcResult result;
-
-  match = FcFontMatch(NULL, pattern, &result);
-  if (!match)
-    return 1;
-
-  if (!(f->match = wld_font_open_pattern(wld.fontctx, 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;
-
-  f->height = f->ascent + f->descent;
-  f->width = f->lbearing + f->rbearing;
-
-  return 0;
-}
-
-void wlloadfonts(char *fontstr, double fontsize) {
-  FcPattern *pattern;
-  double fontval;
-  float ceilf(float);
-
-  if (fontstr[0] == '-') {
-    /* XXX: need XftXlfdParse equivalent */
-    pattern = NULL;
-  } 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 {
-    if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
-        FcResultMatch) {
-      usedfontsize = fontval;
-    } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
-               FcResultMatch) {
-      usedfontsize = -1;
-    } else {
-      /*
-       * Default font size is 12, if none given. This is to
-       * have a known usedfontsize value.
-       */
-      FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
-      usedfontsize = 12;
-    }
-    defaultfontsize = usedfontsize;
-  }
-
-  FcConfigSubstitute(0, pattern, FcMatchPattern);
-  FcDefaultSubstitute(pattern);
-
-  if (wlloadfont(&dc.font, pattern))
-    die("st: can't open font %s\n", fontstr);
-
-  if (usedfontsize < 0) {
-    FcPatternGetDouble(dc.font.pattern, FC_PIXEL_SIZE, 0, &fontval);
-    usedfontsize = fontval;
-    if (fontsize == 0)
-      defaultfontsize = fontval;
-  }
-
-  /* Setting character width and height. */
-  wl.cw = ceilf(dc.font.width * cwscale);
-  wl.ch = ceilf(dc.font.height * chscale);
-
-  FcPatternDel(pattern, FC_SLANT);
-  FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
-  if (wlloadfont(&dc.ifont, pattern))
-    die("st: can't open font %s\n", fontstr);
-
-  FcPatternDel(pattern, FC_WEIGHT);
-  FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
-  if (wlloadfont(&dc.ibfont, pattern))
-    die("st: can't open font %s\n", fontstr);
-
-  FcPatternDel(pattern, FC_SLANT);
-  FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
-  if (wlloadfont(&dc.bfont, pattern))
-    die("st: can't open font %s\n", fontstr);
-
-  FcPatternDestroy(pattern);
-}
-
-void wlunloadfont(Font *f) {
-  wld_font_close(f->match);
-  FcPatternDestroy(f->pattern);
-  if (f->set)
-    FcFontSetDestroy(f->set);
-}
-
-void wlunloadfonts(void) {
-  /* Free the loaded fonts in the font cache.  */
-  while (frclen > 0)
-    wld_font_close(frc[--frclen].font);
-
-  wlunloadfont(&dc.font);
-  wlunloadfont(&dc.bfont);
-  wlunloadfont(&dc.ifont);
-  wlunloadfont(&dc.ibfont);
-}
-
-void wlzoom(const Arg *arg) {
-  Arg larg;
-
-  larg.f = usedfontsize + arg->f;
-  wlzoomabs(&larg);
-}
-
-void wlzoomabs(const Arg *arg) {
-  wlunloadfonts();
-  wlloadfonts(usedfont, arg->f);
-  cresize(0, 0);
-  redraw();
-  /* XXX: Should the window size be updated here because wayland doesn't
-   * have a notion of hints?
-   * xhints();
-   */
-}
-
-void wlzoomreset(const Arg *arg) {
-  Arg larg;
-
-  if (defaultfontsize > 0) {
-    larg.f = defaultfontsize;
-    wlzoomabs(&larg);
-  }
-}
-
-void wlinit(void) {
-  struct wl_registry *registry;
-
-  if (!(wl.dpy = wl_display_connect(NULL)))
-    die("Can't open display\n");
-
-  registry = wl_display_get_registry(wl.dpy);
-  wl_registry_add_listener(registry, &reglistener, NULL);
-
-  wl_display_dispatch(wl.dpy);
-  wl_display_roundtrip(wl.dpy);
-
-  wld.ctx = wld_wayland_create_context(wl.dpy, WLD_ANY);
-  if (!wld.ctx)
-    die("Can't create wayland context\n");
-  wld.renderer = wld_create_renderer(wld.ctx);
-  if (!wld.ctx)
-    die("Can't create renderer\n");
-  if (!wl.shm)
-    die("Display has no SHM\n");
-  if (!wl.seat)
-    die("Display has no seat\n");
-  if (!wl.datadevmanager)
-    die("Display has no data device manager\n");
-
-  wl.xkb.ctx = xkb_context_new(0);
-
-  wl_display_roundtrip(wl.dpy);
-  wl.keyboard = wl_seat_get_keyboard(wl.seat);
-  if (!wl.keyboard)
-    die("Display has no keyboard\n");
-  wl_keyboard_add_listener(wl.keyboard, &kbdlistener, NULL);
-  wl.pointer = wl_seat_get_pointer(wl.seat);
-  wl_pointer_add_listener(wl.pointer, &ptrlistener, NULL);
-  wl.datadev =
-      wl_data_device_manager_get_data_device(wl.datadevmanager, wl.seat);
-  wl_data_device_add_listener(wl.datadev, &datadevlistener, NULL);
-
-  /* font */
-  if (!FcInit())
-    die("Could not init fontconfig.\n");
-
-  usedfont = (opt_font == NULL) ? font : opt_font;
-  wld.fontctx = wld_font_create_context();
-  wlloadfonts(usedfont, 0);
-
-  wlloadcols();
-  wlloadcursor();
-  wl.vis = 0;
-  wl.h = 2 * borderpx + term.row * wl.ch;
-  wl.w = 2 * borderpx + term.col * wl.cw;
-
-  wl.surface = wl_compositor_create_surface(wl.cmp);
-  wl_surface_add_listener(wl.surface, &surflistener, NULL);
-  if (wl.xdgshell) {
-    xdg_shell_use_unstable_version(wl.xdgshell, XDG_SHELL_VERSION_CURRENT);
-    wl.xdgsurface = xdg_shell_get_xdg_surface(wl.xdgshell, wl.surface);
-    if (wl.xdgsurface) {
-      xdg_shell_add_listener(wl.xdgshell, &shell_listener, NULL);
-      xdg_surface_add_listener(wl.xdgsurface, &xdgsurflistener, NULL);
-    } else
-      die("failed to get xdgsurface");
-  } else if (wl.xdgshell_v6) {
-    wl.xdgsurface_v6 =
-        zxdg_shell_v6_get_xdg_surface(wl.xdgshell_v6, wl.surface);
-    zxdg_surface_v6_add_listener(wl.xdgsurface_v6, &surf_v6_listener, NULL);
-    wl.xdgtoplevel = zxdg_surface_v6_get_toplevel(wl.xdgsurface_v6);
-    zxdg_toplevel_v6_add_listener(wl.xdgtoplevel, &xdgtoplevellistener, NULL);
-  } else
-    die("no wayland shell");
-  wl_surface_commit(wl.surface);
-  wlresettitle();
-}
-
-/*
- * TODO: Implement something like XftDrawGlyphFontSpec in wld, and then apply a
- * similar patch to ae1923d27533ff46400d93765e971558201ca1ee
- */
-
-void wldraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
-  int winx = borderpx + x * wl.cw, winy = borderpx + y * wl.ch,
-      width = charlen * wl.cw, xp, i;
-  int frcflags, charexists;
-  int u8fl, u8fblen, u8cblen, doesexist;
-  char *u8c, *u8fs;
-  Rune unicodep;
-  Font *font = &dc.font;
-  FcResult fcres;
-  FcPattern *fcpattern, *fontpattern;
-  FcFontSet *fcsets[] = {NULL};
-  FcCharSet *fccharset;
-  uint32_t fg, bg, temp;
-  int oneatatime;
-
-  frcflags = FRC_NORMAL;
-
-  if (base.mode & ATTR_ITALIC) {
-    if (base.fg == defaultfg)
-      base.fg = defaultitalic;
-    font = &dc.ifont;
-    frcflags = FRC_ITALIC;
-  } else if ((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
-    if (base.fg == defaultfg)
-      base.fg = defaultitalic;
-    font = &dc.ibfont;
-    frcflags = FRC_ITALICBOLD;
-  } else if (base.mode & ATTR_UNDERLINE) {
-    if (base.fg == defaultfg)
-      base.fg = defaultunderline;
-  }
-
-  if (IS_TRUECOL(base.fg)) {
-    fg = base.fg;
-  } else {
-    fg = dc.col[base.fg];
-  }
-
-  if (IS_TRUECOL(base.bg)) {
-    bg = base.bg | 0xff000000;
-  } else {
-    bg = dc.col[base.bg];
-  }
-
-  if (base.mode & ATTR_BOLD) {
-    /*
-     * change basic system colors [0-7]
-     * to bright system colors [8-15]
-     */
-    if (BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
-      fg = dc.col[base.fg + 8];
-
-    if (base.mode & ATTR_ITALIC) {
-      font = &dc.ibfont;
-      frcflags = FRC_ITALICBOLD;
-    } else {
-      font = &dc.bfont;
-      frcflags = FRC_BOLD;
-    }
-  }
-
-  if (IS_SET(MODE_REVERSE)) {
-    if (fg == dc.col[defaultfg]) {
-      fg = dc.col[defaultbg];
-    } else {
-      fg = ~(fg & 0xffffff);
-    }
-
-    if (bg == dc.col[defaultbg]) {
-      bg = dc.col[defaultfg];
-    } else {
-      bg = ~(bg & 0xffffff);
-    }
-  }
-
-  if (base.mode & ATTR_REVERSE) {
-    temp = fg;
-    fg = bg;
-    bg = temp;
-  }
-
-  if (base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
-    fg = (fg & (0xff << 24)) | ((((fg >> 16) & 0xff) / 2) << 16) |
-         ((((fg >> 8) & 0xff) / 2) << 8) | ((fg & 0xff) / 2);
-  }
-
-  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) {
-    wlclear(0, (y == 0) ? 0 : winy, borderpx,
-            ((y >= term.row - 1) ? wl.h : (winy + wl.ch)));
-  }
-  if (x + charlen >= term.col) {
-    wlclear(winx + width, (y == 0) ? 0 : winy, wl.w,
-            ((y >= term.row - 1) ? wl.h : (winy + wl.ch)));
-  }
-  if (y == 0)
-    wlclear(winx, 0, winx + width, borderpx);
-  if (y == term.row - 1)
-    wlclear(winx, winy + wl.ch, winx + width, wl.h);
-
-  /* Clean up the region we want to draw to. */
-  wld_fill_rectangle(wld.renderer,
-                     (bg & (term_alpha << 24)) | (bg & 0x00FFFFFF), winx, winy,
-                     width, wl.ch);
-  for (xp = winx; bytelen > 0;) {
-    /*
-     * Search for the range in the to be printed string of glyphs
-     * that are in the main font. Then print that range. If
-     * some glyph is found that is not in the font, do the
-     * fallback dance.
-     */
-    u8fs = s;
-    u8fblen = 0;
-    u8fl = 0;
-    oneatatime = font->width != wl.cw;
-    for (;;) {
-      u8c = s;
-      u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
-      s += u8cblen;
-      bytelen -= u8cblen;
-
-      doesexist = wld_font_ensure_char(font->match, unicodep);
-      if (doesexist) {
-        u8fl++;
-        u8fblen += u8cblen;
-        if (!oneatatime && bytelen > 0)
-          continue;
-      }
-
-      if (u8fl > 0) {
-        wld_draw_text(wld.renderer, font->match, fg, xp, winy + font->ascent,
-                      u8fs, u8fblen, NULL);
-        xp += wl.cw * u8fl;
-      }
-      break;
-    }
-    if (doesexist) {
-      if (oneatatime)
-        continue;
-      break;
-    }
-
-    /* Search the font cache. */
-    for (i = 0; i < frclen; i++) {
-      charexists = wld_font_ensure_char(frc[i].font, unicodep);
-      /* Everything correct. */
-      if (charexists && frc[i].flags == frcflags)
-        break;
-      /* We got a default font for a not found glyph. */
-      if (!charexists && frc[i].flags == frcflags &&
-          frc[i].unicodep == unicodep) {
-        break;
-      }
-    }
-
-    /* Nothing was found. */
-    if (i >= frclen) {
-      if (!font->set)
-        font->set = FcFontSort(0, font->pattern, 1, 0, &fcres);
-      fcsets[0] = font->set;
-
-      /*
-       * Nothing was found in the cache. Now use
-       * some dozen of Fontconfig calls to get the
-       * font for one single character.
-       *
-       * Xft and fontconfig are design failures.
-       */
-      fcpattern = FcPatternDuplicate(font->pattern);
-      fccharset = FcCharSetCreate();
-
-      FcCharSetAddChar(fccharset, unicodep);
-      FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
-      FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
-
-      FcConfigSubstitute(0, fcpattern, FcMatchPattern);
-      FcDefaultSubstitute(fcpattern);
-
-      fontpattern = FcFontSetMatch(0, fcsets, 1, fcpattern, &fcres);
-
-      /*
-       * Overwrite or create the new cache entry.
-       */
-      if (frclen >= LEN(frc)) {
-        frclen = LEN(frc) - 1;
-        wld_font_close(frc[frclen].font);
-        frc[frclen].unicodep = 0;
-      }
-
-      frc[frclen].font = wld_font_open_pattern(wld.fontctx, fontpattern);
-      frc[frclen].flags = frcflags;
-      frc[frclen].unicodep = unicodep;
-
-      i = frclen;
-      frclen++;
-
-      FcPatternDestroy(fcpattern);
-      FcCharSetDestroy(fccharset);
-    }
-
-    wld_draw_text(wld.renderer, frc[i].font, fg, xp, winy + frc[i].font->ascent,
-                  u8c, u8cblen, NULL);
-
-    xp += wl.cw * wcwidth(unicodep);
-  }
-
-  if (base.mode & ATTR_UNDERLINE) {
-    wld_fill_rectangle(wld.renderer, fg, winx, winy + font->ascent + 1, width,
-                       1);
-  }
-
-  if (base.mode & ATTR_STRUCK) {
-    wld_fill_rectangle(wld.renderer, fg, winx, winy + 2 * font->ascent / 3,
-                       width, 1);
-  }
-}
-
-void wldrawglyph(Glyph g, int x, int y) {
-  static char buf[UTF_SIZ];
-  size_t len = utf8encode(g.u, buf);
-  int width = g.mode & ATTR_WIDE ? 2 : 1;
-
-  wldraws(buf, g, x, y, width, len);
-}
-
-void wldrawcursor(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 */
-  wldrawglyph(term.line[oldy][oldx], oldx, oldy);
-  if (oldx != curx || oldy != term.c.y) {
-    wl_surface_damage(wl.surface, borderpx + oldx * wl.cw,
-                      borderpx + oldy * wl.ch, wl.cw, wl.ch);
-  }
-
-  if (IS_SET(MODE_HIDE))
-    return;
-  uint32_t cs = dc.col[defaultcs] & (term_alpha << 24);
-  /* draw the new one */
-  if (wl.state & WIN_FOCUSED) {
-    switch (wl.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;
-      wldrawglyph(g, term.c.x, term.c.y);
-      break;
-    case 3: /* Blinking Underline */
-    case 4: /* Steady Underline */
-      wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
-                         borderpx + (term.c.y + 1) * wl.ch - cursorthickness,
-                         wl.cw, cursorthickness);
-      break;
-    case 5: /* Blinking bar */
-    case 6: /* Steady bar */
-      wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
-                         borderpx + term.c.y * wl.ch, cursorthickness, wl.ch);
-      break;
-    }
-  } else {
-    wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
-                       borderpx + term.c.y * wl.ch, wl.cw - 1, 1);
-    wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
-                       borderpx + term.c.y * wl.ch, 1, wl.ch - 1);
-    wld_fill_rectangle(wld.renderer, cs, borderpx + (curx + 1) * wl.cw - 1,
-                       borderpx + term.c.y * wl.ch, 1, wl.ch - 1);
-    wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
-                       borderpx + (term.c.y + 1) * wl.ch - 1, wl.cw, 1);
-  }
-  wl_surface_damage(wl.surface, borderpx + curx * wl.cw,
-                    borderpx + term.c.y * wl.ch, wl.cw, wl.ch);
-  oldx = curx, oldy = term.c.y;
-}
-
-void wlsettitle(char *title) {
-  if (wl.xdgsurface)
-    xdg_surface_set_title(wl.xdgsurface, title);
-  else if (wl.xdgtoplevel)
-    zxdg_toplevel_v6_set_title(wl.xdgtoplevel, title);
-  else if (wl.shellsurf)
-    wl_shell_surface_set_title(wl.shellsurf, title);
-}
-
-void wlresettitle(void) { wlsettitle(opt_title ? opt_title : "st"); }
-
-void redraw(void) { tfulldirt(); }
-
-void draw(void) {
-  int y, y0;
-
-  for (y = 0; y <= term.bot; ++y) {
-    if (!term.dirty[y])
-      continue;
-    for (y0 = y; y <= term.bot && term.dirty[y]; ++y)
-      ;
-    wl_surface_damage(wl.surface, 0, borderpx + y0 * wl.ch, wl.w,
-                      (y - y0) * wl.ch);
-  }
-
-  wld_set_target_buffer(wld.renderer, wld.buffer);
-  drawregion(0, 0, term.col, term.row);
-  wl.framecb = wl_surface_frame(wl.surface);
-  wl_callback_add_listener(wl.framecb, &framelistener, NULL);
-  wld_flush(wld.renderer);
-  wl_surface_attach(wl.surface, wl.buffer, 0, 0);
-  wl_surface_commit(wl.surface);
-  /* need to wait to destroy the old buffer until we commit the new
-   * buffer */
-  if (wld.oldbuffer) {
-    wld_buffer_unreference(wld.oldbuffer);
-    wld.oldbuffer = 0;
-  }
-  needdraw = false;
-}
-
-void drawregion(int x1, int y1, int x2, int y2) {
-  int ic, ib, x, y, ox;
-  Glyph base, new;
-  char buf[DRAW_BUF_SIZ];
-  int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
-
-  for (y = y1; y < y2; y++) {
-    if (!term.dirty[y])
-      continue;
-
-    wltermclear(0, y, term.col, y);
-    term.dirty[y] = 0;
-    base = term.line[y][0];
-    ic = ib = ox = 0;
-    for (x = x1; x < x2; x++) {
-      new = term.line[y][x];
-      if (new.mode == ATTR_WDUMMY)
-        continue;
-      if (ena_sel && selected(x, y))
-        new.mode ^= ATTR_REVERSE;
-      if (ib > 0 && (ATTRCMP(base, new) || ib >= DRAW_BUF_SIZ - UTF_SIZ)) {
-        wldraws(buf, base, ox, y, ic, ib);
-        ic = ib = 0;
-      }
-      if (ib == 0) {
-        ox = x;
-        base = new;
-      }
-
-      ib += utf8encode(new.u, buf + ib);
-      ic += (new.mode &ATTR_WIDE) ? 2 : 1;
-    }
-    if (ib > 0)
-      wldraws(buf, base, ox, y, ic, ib);
-  }
-  wldrawcursor();
-}
-
-void wlseturgency(int add) { /* XXX: no urgency equivalent yet in wayland */
-}
-
-int match(uint mask, uint state) {
-  return mask == MOD_MASK_ANY || mask == (state & ~(ignoremod));
-}
-
-void numlock(const Arg *dummy) { term.numlock ^= 1; }
-
-char *kmap(xkb_keysym_t 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 cresize(int width, int height) {
-  int col, row;
-
-  if (width != 0)
-    wl.w = width;
-  if (height != 0)
-    wl.h = height;
-
-  col = (wl.w - 2 * borderpx) / wl.cw;
-  row = (wl.h - 2 * borderpx) / wl.ch;
-
-  tresize(col, row);
-  wlresize(col, row);
-  ttyresize();
-}
-
-void regglobal(void *data, struct wl_registry *registry, uint32_t name,
-               const char *interface, uint32_t version) {
-  if (getenv("WTERM_DEBUG"))
-    printf("interface %s\n", interface);
-
-  if (strcmp(interface, "wl_compositor") == 0) {
-    wl.cmp = wl_registry_bind(registry, name, &wl_compositor_interface, 3);
-  } else if (strcmp(interface, "zxdg_shell_v6") == 0) {
-    // printf("init zxdg_shell_v6\n");
-    wl.xdgshell_v6 =
-        wl_registry_bind(registry, name, &zxdg_shell_v6_interface, 1);
-    zxdg_shell_v6_add_listener(wl.xdgshell_v6, &shell_v6_listener, NULL);
-  } else if (strcmp(interface, "wl_shm") == 0) {
-    wl.shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
-  } else if (strcmp(interface, "wl_seat") == 0) {
-    wl.seat = wl_registry_bind(registry, name, &wl_seat_interface, 4);
-  } else if (strcmp(interface, "wl_data_device_manager") == 0) {
-    wl.datadevmanager =
-        wl_registry_bind(registry, name, &wl_data_device_manager_interface, 1);
-  } else if (strcmp(interface, "wl_output") == 0) {
-    /* bind to outputs so we can get surface enter events */
-    wl_registry_bind(registry, name, &wl_output_interface, 2);
-  } else if (strcmp(interface, "xdg_shell") == 0) {
-    wl.xdgshell = wl_registry_bind(registry, name, &xdg_shell_interface, 1);
-  }
-}
-
-void regglobalremove(void *data, struct wl_registry *registry, uint32_t name) {}
-
-void surfenter(void *data, struct wl_surface *surface,
-               struct wl_output *output) {
-  wl.vis++;
-  if (!(wl.state & WIN_VISIBLE))
-    wl.state |= WIN_VISIBLE;
-}
-
-void surfleave(void *data, struct wl_surface *surface,
-               struct wl_output *output) {
-  if (--wl.vis == 0)
-    wl.state &= ~WIN_VISIBLE;
-}
-
-void framedone(void *data, struct wl_callback *callback, uint32_t msecs) {
-  wl_callback_destroy(callback);
-  wl.framecb = NULL;
-  if (needdraw && wl.state & WIN_VISIBLE) {
-    draw();
-  }
-}
-
-void kbdkeymap(void *data, struct wl_keyboard *keyboard, uint32_t format,
-               int32_t fd, uint32_t size) {
-  char *string;
-
-  if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
-    close(fd);
-    return;
-  }
-
-  string = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
-
-  if (string == MAP_FAILED) {
-    close(fd);
-    return;
-  }
-  wl.xkb.keymap = xkb_keymap_new_from_string(wl.xkb.ctx, string,
-                                             XKB_KEYMAP_FORMAT_TEXT_V1, 0);
-  munmap(string, size);
-  close(fd);
-  wl.xkb.state = xkb_state_new(wl.xkb.keymap);
-
-  wl.xkb.ctrl = xkb_keymap_mod_get_index(wl.xkb.keymap, XKB_MOD_NAME_CTRL);
-  wl.xkb.alt = xkb_keymap_mod_get_index(wl.xkb.keymap, XKB_MOD_NAME_ALT);
-  wl.xkb.shift = xkb_keymap_mod_get_index(wl.xkb.keymap, XKB_MOD_NAME_SHIFT);
-  wl.xkb.logo = xkb_keymap_mod_get_index(wl.xkb.keymap, XKB_MOD_NAME_LOGO);
-
-  wl.xkb.mods = 0;
-}
-
-void kbdenter(void *data, struct wl_keyboard *keyboard, uint32_t serial,
-              struct wl_surface *surface, struct wl_array *keys) {
-  wl.state |= WIN_FOCUSED;
-  if (IS_SET(MODE_FOCUS))
-    ttywrite("\033[I", 3);
-  /* need to redraw the cursor */
-  needdraw = true;
-}
-
-void kbdleave(void *data, struct wl_keyboard *keyboard, uint32_t serial,
-              struct wl_surface *surface) {
-  /* selection offers are invalidated when we lose keyboard focus */
-  wl.seloffer = NULL;
-  wl.state &= ~WIN_FOCUSED;
-  if (IS_SET(MODE_FOCUS))
-    ttywrite("\033[O", 3);
-  /* need to redraw the cursor */
-  needdraw = true;
-  /* disable key repeat */
-  repeat.len = 0;
-}
-
-void kbdkey(void *data, struct wl_keyboard *keyboard, uint32_t serial,
-            uint32_t time, uint32_t key, uint32_t state) {
-  xkb_keysym_t ksym;
-  char buf[32], *str;
-  int len;
-  Rune c;
-  Shortcut *bp;
-
-  if (IS_SET(MODE_KBDLOCK))
-    return;
-
-  if (state == WL_KEYBOARD_KEY_STATE_RELEASED) {
-    if (repeat.key == key)
-      repeat.len = 0;
-    return;
-  }
-
-  ksym = xkb_state_key_get_one_sym(wl.xkb.state, key + 8);
-  len = xkb_keysym_to_utf8(ksym, buf, sizeof buf);
-  if (len > 0)
-    --len;
-
-  /* 1. shortcuts */
-  for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
-    if (ksym == bp->keysym && match(bp->mod, wl.xkb.mods)) {
-      bp->func(&(bp->arg));
-      return;
-    }
-  }
-
-  /* 2. custom keys from config.h */
-  if ((str = kmap(ksym, wl.xkb.mods))) {
-    len = strlen(str);
-    goto send;
-  }
-
-  /* 3. composed string from input method */
-  if (len == 0)
-    return;
-  if (len == 1 && wl.xkb.mods & MOD_MASK_ALT) {
-    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;
-    }
-  }
-  /* convert character to control character */
-  else if (len == 1 && wl.xkb.mods & MOD_MASK_CTRL) {
-    if ((*buf >= '@' && *buf < '\177') || *buf == ' ')
-      *buf &= 0x1F;
-    else if (*buf == '2')
-      *buf = '\000';
-    else if (*buf >= '3' && *buf <= '7')
-      *buf -= ('3' - '\033');
-    else if (*buf == '8')
-      *buf = '\177';
-    else if (*buf == '/')
-      *buf = '_' & 0x1F;
-  }
-
-  str = buf;
-
-send:
-  memcpy(repeat.str, str, len);
-  repeat.key = key;
-  repeat.len = len;
-  repeat.started = false;
-  clock_gettime(CLOCK_MONOTONIC, &repeat.last);
-  ttysend(str, len);
-}
-
-void kbdmodifiers(void *data, struct wl_keyboard *keyboard, uint32_t serial,
-                  uint32_t dep, uint32_t lat, uint32_t lck, uint32_t group) {
-  if (!wl.xkb.state)
-    return;
-  xkb_mod_mask_t mod_mask;
-  xkb_state_update_mask(wl.xkb.state, dep, lat, lck, group, 0, 0);
-
-  mod_mask = xkb_state_serialize_mods(wl.xkb.state, XKB_STATE_MODS_EFFECTIVE);
-  wl.xkb.mods = 0;
-
-  if (mod_mask & (1 << wl.xkb.ctrl))
-    wl.xkb.mods |= MOD_MASK_CTRL;
-  if (mod_mask & (1 << wl.xkb.alt))
-    wl.xkb.mods |= MOD_MASK_ALT;
-  if (mod_mask & (1 << wl.xkb.shift))
-    wl.xkb.mods |= MOD_MASK_SHIFT;
-  if (mod_mask & (1 << wl.xkb.logo))
-    wl.xkb.mods |= MOD_MASK_LOGO;
-}
-
-void kbdrepeatinfo(void *data, struct wl_keyboard *keyboard, int32_t rate,
-                   int32_t delay) {
-  keyrepeatdelay = delay;
-  keyrepeatinterval = 1000 / rate;
-}
-
-void ptrenter(void *data, struct wl_pointer *pointer, uint32_t serial,
-              struct wl_surface *surface, wl_fixed_t x, wl_fixed_t y) {
-  struct wl_cursor_image *img = cursor.cursor->images[0];
-  struct wl_buffer *buffer;
-
-  wl_pointer_set_cursor(pointer, serial, cursor.surface, img->hotspot_x,
-                        img->hotspot_y);
-  buffer = wl_cursor_image_get_buffer(img);
-  wl_surface_attach(cursor.surface, buffer, 0, 0);
-  wl_surface_damage(cursor.surface, 0, 0, img->width, img->height);
-  wl_surface_commit(cursor.surface);
-}
-
-void ptrleave(void *data, struct wl_pointer *pointer, uint32_t serial,
-              struct wl_surface *surface) {}
-
-void ptrmotion(void *data, struct wl_pointer *pointer, uint32_t serial,
-               wl_fixed_t x, wl_fixed_t y) {
-  int oldey, oldex, oldsby, oldsey;
-
-  if (IS_SET(MODE_MOUSE)) {
-    wlmousereportmotion(x, y);
-    return;
-  }
-
-  wl.px = wl_fixed_to_int(x);
-  wl.py = wl_fixed_to_int(y);
-
-  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();
-
-  if (oldey != sel.oe.y || oldex != sel.oe.x)
-    tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
-}
-
-void ptrbutton(void *data, struct wl_pointer *pointer, uint32_t serial,
-               uint32_t time, uint32_t button, uint32_t state) {
-  Mousekey *mk;
-
-  if (IS_SET(MODE_MOUSE) && !(wl.xkb.mods & forceselmod)) {
-    wlmousereportbutton(button, state);
-    return;
-  }
-
-  switch (state) {
-  case WL_POINTER_BUTTON_STATE_RELEASED:
-    if (button == BTN_MIDDLE) {
-      selpaste(NULL);
-    } else if (button == BTN_LEFT) {
-      if (sel.mode == SEL_READY) {
-        getbuttoninfo();
-        selcopy(serial);
-      } else
-        selclear();
-      sel.mode = SEL_IDLE;
-      tsetdirt(sel.nb.y, sel.ne.y);
-    }
-    break;
-
-  case WL_POINTER_BUTTON_STATE_PRESSED:
-    for (mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
-      if (button == mk->b && match(mk->mask, wl.xkb.mods)) {
-        ttysend(mk->s, strlen(mk->s));
-        return;
-      }
-    }
-
-    if (button == BTN_LEFT) {
-      /* Clear previous selection, logically and visually. */
-      selclear();
-      sel.mode = SEL_EMPTY;
-      sel.type = SEL_REGULAR;
-      sel.oe.x = sel.ob.x = x2col(wl.px);
-      sel.oe.y = sel.ob.y = y2row(wl.py);
-
-      /*
-       * If the user clicks below predefined timeouts
-       * specific snapping behaviour is exposed.
-       */
-      if (time - sel.tclick2 <= tripleclicktimeout) {
-        sel.snap = SNAP_LINE;
-      } else if (time - 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 = time;
-    }
-    break;
-  }
-}
-
-void ptraxis(void *data, struct wl_pointer *pointer, uint32_t time,
-             uint32_t axis, wl_fixed_t value) {
-  Axiskey *ak;
-  int dir = value > 0 ? +1 : -1;
-
-  if (IS_SET(MODE_MOUSE) && !(wl.xkb.mods & forceselmod)) {
-    wlmousereportaxis(axis, value);
-    return;
-  }
-
-  for (ak = ashortcuts; ak < ashortcuts + LEN(ashortcuts); ak++) {
-    if (axis == ak->axis && dir == ak->dir && match(ak->mask, wl.xkb.mods)) {
-      ttysend(ak->s, strlen(ak->s));
-      return;
-    }
-  }
-}
-
-void shellsurfping(void *user, struct wl_shell_surface *surface,
-                   uint32_t serial) {
-  wl_shell_surface_pong(surface, serial);
-  if (getenv("WTERM_DEBUG"))
-    printf("shellsurf ping serial=%d\n", serial);
-}
-void shellsurfconfigure(void *user, struct wl_shell_surface *surface,
-                        uint32_t edges, int32_t w, int32_t h) {
-  if (getenv("WTERM_DEBUG"))
-    printf("shell surface configured\n");
-}
-
-void shellsurfpopupdone(void *user, struct wl_shell_surface *surface) {}
-
-void xdgshellv6ping(void *data, struct zxdg_shell_v6 *shell, uint32_t serial) {
-  zxdg_shell_v6_pong(shell, serial);
-}
-
-void xdgsurfv6configure(void *data, struct zxdg_surface_v6 *surf,
-                        uint32_t serial) {
-  zxdg_surface_v6_ack_configure(surf, serial);
-}
-
-void xdgshellping(void *data, struct xdg_shell *shell, uint32_t serial) {
-  xdg_shell_pong(shell, serial);
-  if (getenv("WTERM_DEBUG"))
-    printf("serial=%d\n", serial);
-}
-
-void xdgsurfconfigure(void *data, struct xdg_surface *surf, int32_t w,
-                      int32_t h, struct wl_array *states, uint32_t serial) {
-  xdg_surface_ack_configure(surf, serial);
-  xdg_surface_set_app_id(surf, opt_class ? opt_class : termname);
-  wl.configured = true;
-  if (wl.h == h && wl.w == w)
-    return;
-  cresize(w, h);
-}
-
-void xdgtopconfigure(void *data, struct zxdg_toplevel_v6 *top, int32_t w,
-                     int32_t h, struct wl_array *states) {
-  zxdg_toplevel_v6_set_app_id(top, opt_class ? opt_class : termname);
-  wl.configured = true;
-  if (wl.w == w && wl.h == h)
-    return;
-  cresize(w, h);
-}
-
-static void close_shell_and_exit() {
-  kill(pid, SIGHUP);
-  exit(0);
-}
-
-void xdgtopclose(void *data, struct zxdg_toplevel_v6 *top) {
-  close_shell_and_exit();
-}
-
-void xdgsurfclose(void *data, struct xdg_surface *surf) {
-  close_shell_and_exit();
-}
-
-void datadevoffer(void *data, struct wl_data_device *datadev,
-                  struct wl_data_offer *offer) {
-  wl_data_offer_add_listener(offer, &dataofferlistener, NULL);
-}
-
-void datadeventer(void *data, struct wl_data_device *datadev, uint32_t serial,
-                  struct wl_surface *surf, wl_fixed_t x, wl_fixed_t y,
-                  struct wl_data_offer *offer) {}
-
-void datadevleave(void *data, struct wl_data_device *datadev) {}
-
-void datadevmotion(void *data, struct wl_data_device *datadev, uint32_t time,
-                   wl_fixed_t x, wl_fixed_t y) {}
-
-void datadevdrop(void *data, struct wl_data_device *datadev) {}
-
-void datadevselection(void *data, struct wl_data_device *datadev,
-                      struct wl_data_offer *offer) {
-  if (offer && (uintptr_t)wl_data_offer_get_user_data(offer) == 1)
-    wl.seloffer = offer;
-  else
-    wl.seloffer = NULL;
-}
-
-void dataofferoffer(void *data, struct wl_data_offer *offer,
-                    const char *mimetype) {
-  /* mark the offer as usable if it supports plain text */
-  if (strncmp(mimetype, "text/plain", 10) == 0)
-    wl_data_offer_set_user_data(offer, (void *)(uintptr_t)1);
-}
-
-void datasrctarget(void *data, struct wl_data_source *source,
-                   const char *mimetype) {}
-
-void datasrcsend(void *data, struct wl_data_source *source,
-                 const char *mimetype, int32_t fd) {
-  char *buf = sel.primary;
-  int len = strlen(sel.primary);
-  ssize_t ret;
-  while ((ret = write(fd, buf, MIN(len, BUFSIZ))) > 0) {
-    len -= ret;
-    buf += ret;
-  }
-  close(fd);
-}
-
-void datasrccancelled(void *data, struct wl_data_source *source) {
-  if (sel.source == source) {
-    sel.source = NULL;
-    selclear();
-  }
-  wl_data_source_destroy(source);
-}
-
-void run(void) {
-  fd_set rfd;
-  int wlfd = wl_display_get_fd(wl.dpy), blinkset = 0;
-  struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
-  ulong msecs;
-
-  ttynew();
-  /* Look for initial configure. */
-  wl_display_roundtrip(wl.dpy);
-  if (!wl.configured) {
-    cresize(wl.w, wl.h);
-  }
-  draw();
-
-  clock_gettime(CLOCK_MONOTONIC, &last);
-  lastblink = last;
-
-  for (;;) {
-    FD_ZERO(&rfd);
-    FD_SET(cmdfd, &rfd);
-    FD_SET(wlfd, &rfd);
-
-    if (pselect(MAX(wlfd, 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(wlfd, &rfd)) {
-
-      if (wl_display_dispatch(wl.dpy) == -1)
-        die("Connection error\n");
-    }
-
-    clock_gettime(CLOCK_MONOTONIC, &now);
-    msecs = -1;
-
-    if (blinkset && blinktimeout) {
-      if (TIMEDIFF(now, lastblink) >= blinktimeout) {
-        tsetdirtattr(ATTR_BLINK);
-        term.mode ^= MODE_BLINK;
-        lastblink = now;
-      } else {
-        msecs = MIN(msecs, blinktimeout - TIMEDIFF(now, lastblink));
-      }
-    }
-    if (repeat.len > 0) {
-      if (TIMEDIFF(now, repeat.last) >=
-          (repeat.started ? keyrepeatinterval : keyrepeatdelay)) {
-        repeat.started = true;
-        repeat.last = now;
-        ttysend(repeat.str, repeat.len);
-      } else {
-        msecs =
-            MIN(msecs, (repeat.started ? keyrepeatinterval : keyrepeatdelay) -
-                           TIMEDIFF(now, repeat.last));
-      }
-    }
-
-    if (needdraw) {
-      if (!wl.framecb) {
-        draw();
-      }
-    }
-
-    if (msecs == -1) {
-      tv = NULL;
-    } else {
-      drawtimeout.tv_nsec = 1E6 * msecs;
-      drawtimeout.tv_sec = 0;
-      tv = &drawtimeout;
-    }
-
-    wl_display_dispatch_pending(wl.dpy);
-    wl_display_flush(wl.dpy);
-  }
-}
-
-void usage(void) {
-  die("%s " VERSION " (c) 2010-2015 st engineers\n"
-      "usage: st [-a] [-v] [-c class] [-f font] [-o file]\n"
-      "          [-t title] [-T title] [-e command ...]"
-      " [command ...]\n"
-      "       st [-a] [-v] [-c class] [-f font] [-o file]\n"
-      "          [-t title] [-T title] [-l line]"
-      " [stty_args ...]\n",
-      argv0);
-}
-
-int main(int argc, char *argv[]) {
-  ARGBEGIN {
-  case 'a':
-    allowaltscreen = 0;
-    break;
-  case 'c':
-    opt_class = EARGF(usage());
-    break;
-  case 'e':
-    if (argc > 0)
-      --argc, ++argv;
-    goto run;
-  case 'f':
-    opt_font = EARGF(usage());
-    break;
-  case 'o':
-    opt_io = EARGF(usage());
-    break;
-  case 'l':
-    opt_line = EARGF(usage());
-    break;
-  case 't':
-  case 'T':
-    opt_title = 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, "");
-  tnew(80, 24);
-  wlinit();
-  selinit();
-  run();
-
-  return 0;
-}
diff --git a/src/wterm.c b/src/wterm.c
new file mode 100644
index 0000000..c954433
--- /dev/null
+++ b/src/wterm.c
@@ -0,0 +1,4063 @@
+/* See LICENSE for license details. */
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+/* for BTN_* definitions */
+#include "wld/wayland.h"
+#include "wld/wld.h"
+#include <fontconfig/fontconfig.h>
+#include <libgen.h>
+#include <linux/input.h>
+#include <locale.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/select.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+#include <wayland-client.h>
+#include <wayland-cursor.h>
+#include <wchar.h>
+#include <xkbcommon/xkbcommon.h>
+
+#include "arg.h"
+#include "xdg-shell-unstable-v5-client-protocol.h"
+#include "xdg-shell-unstable-v6-client-protocol.h"
+
+char *argv0;
+
+#if defined(__linux)
+#include <pty.h>
+#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
+#include <util.h>
+#elif defined(__FreeBSD__) || defined(__DragonFly__)
+#include <libutil.h>
+#endif
+
+/* Arbitrary sizes */
+#define UTF_INVALID 0xFFFD
+#define UTF_SIZ 4
+#define ESC_BUF_SIZ (128 * UTF_SIZ)
+#define ESC_ARG_SIZ 16
+#define STR_BUF_SIZ ESC_BUF_SIZ
+#define STR_ARG_SIZ ESC_ARG_SIZ
+#define DRAW_BUF_SIZ 20 * 1024
+#define XK_ANY_MOD UINT_MAX
+#define XK_NO_MOD 0
+#define XK_SWITCH_MOD (1 << 13)
+
+#define MOD_MASK_ANY UINT_MAX
+#define MOD_MASK_NONE 0
+#define MOD_MASK_CTRL (1 << 0)
+#define MOD_MASK_ALT (1 << 1)
+#define MOD_MASK_SHIFT (1 << 2)
+#define MOD_MASK_LOGO (1 << 3)
+
+#define AXIS_VERTICAL WL_POINTER_AXIS_VERTICAL_SCROLL
+#define AXIS_HORIZONTAL WL_POINTER_AXIS_HORIZONTAL_SCROLL
+
+/* macros */
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define MAX(a, b) ((a) < (b) ? (b) : (a))
+#define LEN(a) (sizeof(a) / sizeof(a)[0])
+#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
+#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
+#define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
+#define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
+#define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
+#define ISDELIM(u) (utf8strchr(worddelimiters, u) != NULL)
+#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
+#define ATTRCMP(a, b)                                                          \
+  ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
+#define IS_SET(flag) ((term.mode & (flag)) != 0)
+#define TIMEDIFF(t1, t2)                                                       \
+  ((t1.tv_sec - t2.tv_sec) * 1000 + (t1.tv_nsec - t2.tv_nsec) / 1E6)
+#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
+
+#define TRUECOLOR(r, g, b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
+#define IS_TRUECOL(x) (1 << 24 & (x))
+#define TRUERED(x) (((x)&0xff0000) >> 8)
+#define TRUEGREEN(x) (((x)&0xff00))
+#define TRUEBLUE(x) (((x)&0xff) << 8)
+
+enum glyph_attribute {
+  ATTR_NULL = 0,
+  ATTR_BOLD = 1 << 0,
+  ATTR_FAINT = 1 << 1,
+  ATTR_ITALIC = 1 << 2,
+  ATTR_UNDERLINE = 1 << 3,
+  ATTR_BLINK = 1 << 4,
+  ATTR_REVERSE = 1 << 5,
+  ATTR_INVISIBLE = 1 << 6,
+  ATTR_STRUCK = 1 << 7,
+  ATTR_WRAP = 1 << 8,
+  ATTR_WIDE = 1 << 9,
+  ATTR_WDUMMY = 1 << 10,
+  ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
+};
+
+enum cursor_movement { CURSOR_SAVE, CURSOR_LOAD };
+
+enum cursor_state {
+  CURSOR_DEFAULT = 0,
+  CURSOR_WRAPNEXT = 1,
+  CURSOR_ORIGIN = 2
+};
+
+enum term_mode {
+  MODE_WRAP = 1 << 0,
+  MODE_INSERT = 1 << 1,
+  MODE_APPKEYPAD = 1 << 2,
+  MODE_ALTSCREEN = 1 << 3,
+  MODE_CRLF = 1 << 4,
+  MODE_MOUSEBTN = 1 << 5,
+  MODE_MOUSEMOTION = 1 << 6,
+  MODE_REVERSE = 1 << 7,
+  MODE_KBDLOCK = 1 << 8,
+  MODE_HIDE = 1 << 9,
+  MODE_ECHO = 1 << 10,
+  MODE_APPCURSOR = 1 << 11,
+  MODE_MOUSESGR = 1 << 12,
+  MODE_8BIT = 1 << 13,
+  MODE_BLINK = 1 << 14,
+  MODE_FBLINK = 1 << 15,
+  MODE_FOCUS = 1 << 16,
+  MODE_MOUSEX10 = 1 << 17,
+  MODE_MOUSEMANY = 1 << 18,
+  MODE_BRCKTPASTE = 1 << 19,
+  MODE_PRINT = 1 << 20,
+  MODE_MOUSE =
+      MODE_MOUSEBTN | MODE_MOUSEMOTION | MODE_MOUSEX10 | MODE_MOUSEMANY,
+};
+
+enum charset {
+  CS_GRAPHIC0,
+  CS_GRAPHIC1,
+  CS_UK,
+  CS_USA,
+  CS_MULTI,
+  CS_GER,
+  CS_FIN
+};
+
+enum escape_state {
+  ESC_START = 1,
+  ESC_CSI = 2,
+  ESC_STR = 4, /* DCS, OSC, PM, APC */
+  ESC_ALTCHARSET = 8,
+  ESC_STR_END = 16, /* a final string was encountered */
+  ESC_TEST = 32,    /* Enter in test mode */
+};
+
+enum window_state { WIN_VISIBLE = 1, WIN_FOCUSED = 2 };
+
+enum selection_mode { SEL_IDLE = 0, SEL_EMPTY = 1, SEL_READY = 2 };
+
+enum selection_type { SEL_REGULAR = 1, SEL_RECTANGULAR = 2 };
+
+enum selection_snap { SNAP_WORD = 1, SNAP_LINE = 2 };
+
+typedef unsigned char uchar;
+typedef unsigned int uint;
+typedef unsigned long ulong;
+typedef unsigned short ushort;
+
+typedef uint_least32_t Rune;
+
+typedef struct {
+  Rune u;      /* character code */
+  ushort mode; /* attribute flags */
+  uint32_t fg; /* foreground  */
+  uint32_t bg; /* background  */
+} Glyph;
+
+typedef Glyph *Line;
+
+typedef struct {
+  Glyph attr; /* current char attributes */
+  int x;
+  int y;
+  char state;
+} TCursor;
+
+/* CSI Escape sequence structs */
+/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
+typedef struct {
+  char buf[ESC_BUF_SIZ]; /* raw string */
+  int len;               /* raw string length */
+  char priv;
+  int arg[ESC_ARG_SIZ];
+  int narg; /* nb of args */
+  char mode[2];
+} CSIEscape;
+
+/* STR Escape sequence structs */
+/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
+typedef struct {
+  char type;             /* ESC type ... */
+  char buf[STR_BUF_SIZ]; /* raw string */
+  int len;               /* raw string length */
+  char *args[STR_ARG_SIZ];
+  int narg; /* nb of args */
+} STREscape;
+
+/* Internal representation of the screen */
+typedef struct {
+  int row;         /* nb row */
+  int col;         /* nb col */
+  Line *line;      /* screen */
+  Line *alt;       /* alternate screen */
+  int *dirty;      /* dirtyness of lines */
+  TCursor c;       /* cursor */
+  int top;         /* top    scroll limit */
+  int bot;         /* bottom scroll limit */
+  int mode;        /* terminal mode flags */
+  int esc;         /* escape state flags */
+  char trantbl[4]; /* charset table translation */
+  int charset;     /* current charset */
+  int icharset;    /* selected charset for sequence */
+  int numlock;     /* lock numbers in keyboard */
+  int *tabs;
+} Term;
+
+typedef struct {
+  struct xkb_context *ctx;
+  struct xkb_keymap *keymap;
+  struct xkb_state *state;
+  xkb_mod_index_t ctrl, alt, shift, logo;
+  unsigned int mods;
+} XKB;
+
+typedef struct {
+  struct wl_display *dpy;
+  struct wl_compositor *cmp;
+  struct wl_shm *shm;
+  struct wl_seat *seat;
+  struct wl_keyboard *keyboard;
+  struct wl_pointer *pointer;
+  struct wl_data_device_manager *datadevmanager;
+  struct wl_data_device *datadev;
+  struct wl_data_offer *seloffer;
+  struct wl_surface *surface;
+  struct wl_buffer *buffer;
+  struct zxdg_shell_v6 *xdgshell_v6;
+  struct wl_shell *shell;
+  struct wl_shell_surface *shellsurf;
+  struct xdg_shell *xdgshell;
+  struct xdg_surface *xdgsurface;
+  struct wl_surface *popupsurface;
+  struct zxdg_surface_v6 *xdgsurface_v6;
+  struct zxdg_toplevel_v6 *xdgtoplevel;
+  XKB xkb;
+  bool configured;
+  int px, py; /* pointer x and y */
+  int tw, th; /* tty width and height */
+  int w, h;   /* window width and height */
+  int ch;     /* char height */
+  int cw;     /* char width  */
+  int vis;
+  char state; /* focus, redraw, visible */
+  int cursor; /* cursor style */
+  struct wl_callback *framecb;
+} Wayland;
+
+typedef struct {
+  struct wld_context *ctx;
+  struct wld_font_context *fontctx;
+  struct wld_renderer *renderer;
+  struct wld_buffer *buffer, *oldbuffer;
+} WLD;
+
+typedef struct {
+  struct wl_cursor_theme *theme;
+  struct wl_cursor *cursor;
+  struct wl_surface *surface;
+} Cursor;
+
+typedef struct {
+  uint b;
+  uint mask;
+  char *s;
+} Mousekey;
+
+typedef struct {
+  int axis;
+  int dir;
+  uint mask;
+  char s[ESC_BUF_SIZ];
+} Axiskey;
+
+typedef struct {
+  xkb_keysym_t k;
+  uint mask;
+  char *s;
+  /* three valued logic variables: 0 indifferent, 1 on, -1 off */
+  signed char appkey;    /* application keypad */
+  signed char appcursor; /* application cursor */
+  signed char crlf;      /* crlf mode          */
+} Key;
+
+typedef struct {
+  int mode;
+  int type;
+  int snap;
+  /*
+   * Selection variables:
+   * nb – normalized coordinates of the beginning of the selection
+   * ne – normalized coordinates of the end of the selection
+   * ob – original coordinates of the beginning of the selection
+   * oe – original coordinates of the end of the selection
+   */
+  struct {
+    int x, y;
+  } nb, ne, ob, oe;
+
+  char *primary;
+  struct wl_data_source *source;
+  int alt;
+  uint32_t tclick1, tclick2;
+} Selection;
+
+typedef union {
+  int i;
+  uint ui;
+  float f;
+  const void *v;
+} Arg;
+
+typedef struct {
+  uint mod;
+  xkb_keysym_t keysym;
+  void (*func)(const Arg *);
+  const Arg arg;
+} Shortcut;
+
+typedef struct {
+  char str[32];
+  uint32_t key;
+  int len;
+  bool started;
+  struct timespec last;
+} Repeat;
+
+/* function definitions used in config.h */
+static void numlock(const Arg *);
+static void selpaste(const Arg *);
+static void wlzoom(const Arg *);
+static void wlzoomabs(const Arg *);
+static void wlzoomreset(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;
+  struct wld_font *match;
+  FcFontSet *set;
+  FcPattern *pattern;
+} Font;
+
+/* Drawing Context */
+typedef struct {
+  uint32_t col[MAX(LEN(colorname), 256)];
+  Font font, bfont, ifont, ibfont;
+} 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 sigchld(int);
+static void run(void);
+static void cresize(int, int);
+
+static void csidump(void);
+static void csihandle(void);
+static void csiparse(void);
+static void csireset(void);
+static int eschandle(uchar);
+static void strdump(void);
+static void strhandle(void);
+static void strparse(void);
+static void strreset(void);
+
+static int tattrset(int);
+static void tprinter(char *, size_t);
+static void tdumpsel(void);
+static void tdumpline(int);
+static void tdump(void);
+static void tclearregion(int, int, int, int);
+static void tcursor(int);
+static void tdeletechar(int);
+static void tdeleteline(int);
+static void tinsertblank(int);
+static void tinsertblankline(int);
+static 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 tresize(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 tsetscroll(int, int);
+static void tswapscreen(void);
+static void tsetdirt(int, int);
+static void tsetdirtattr(int);
+static void tsetmode(int, int, int *, int);
+static void tfulldirt(void);
+static void techo(Rune);
+static void tcontrolcode(uchar);
+static void tdectest(char);
+static uint32_t tdefcolor(int *, int *, int);
+static void tdeftran(char);
+static inline int match(uint, uint);
+static void ttynew(void);
+static void ttyread(void);
+static void ttyresize(void);
+static void ttysend(char *, size_t);
+static void ttywrite(const char *, size_t);
+static void tstrsequence(uchar);
+
+static inline uchar sixd_to_8bit(int);
+static void wldraws(char *, Glyph, int, int, int, int);
+static void wldrawglyph(Glyph, int, int);
+static void wlclear(int, int, int, int);
+static void wldrawcursor(void);
+static void wlinit(void);
+static void wlloadcols(void);
+static int wlsetcolorname(int, const char *);
+static void wlloadcursor(void);
+static int wlloadfont(Font *, FcPattern *);
+static void wlloadfonts(char *, double);
+static void wlsettitle(char *);
+static void wlresettitle(void);
+static void wlseturgency(int);
+static void wlsetsel(char *, uint32_t);
+static void wltermclear(int, int, int, int);
+static void wlunloadfont(Font *f);
+static void wlunloadfonts(void);
+static void wlresize(int, int);
+
+static void regglobal(void *, struct wl_registry *, uint32_t, const char *,
+                      uint32_t);
+static void regglobalremove(void *, struct wl_registry *, uint32_t);
+static void surfenter(void *, struct wl_surface *, struct wl_output *);
+static void surfleave(void *, struct wl_surface *, struct wl_output *);
+static void framedone(void *, struct wl_callback *, uint32_t);
+static void kbdkeymap(void *, struct wl_keyboard *, uint32_t, int32_t,
+                      uint32_t);
+static void kbdenter(void *, struct wl_keyboard *, uint32_t,
+                     struct wl_surface *, struct wl_array *);
+static void kbdleave(void *, struct wl_keyboard *, uint32_t,
+                     struct wl_surface *);
+static void kbdkey(void *, struct wl_keyboard *, uint32_t, uint32_t, uint32_t,
+                   uint32_t);
+static void kbdmodifiers(void *, struct wl_keyboard *, uint32_t, uint32_t,
+                         uint32_t, uint32_t, uint32_t);
+static void kbdrepeatinfo(void *, struct wl_keyboard *, int32_t, int32_t);
+static void ptrenter(void *, struct wl_pointer *, uint32_t, struct wl_surface *,
+                     wl_fixed_t, wl_fixed_t);
+static void ptrleave(void *, struct wl_pointer *, uint32_t,
+                     struct wl_surface *);
+static void ptrmotion(void *, struct wl_pointer *, uint32_t, wl_fixed_t,
+                      wl_fixed_t);
+static void ptrbutton(void *, struct wl_pointer *, uint32_t, uint32_t, uint32_t,
+                      uint32_t);
+static void ptraxis(void *, struct wl_pointer *, uint32_t, uint32_t,
+                    wl_fixed_t);
+
+static void shellsurfping(void *, struct wl_shell_surface *, uint32_t);
+static void shellsurfconfigure(void *, struct wl_shell_surface *, uint32_t,
+                               int32_t, int32_t);
+static void shellsurfpopupdone(void *, struct wl_shell_surface *);
+
+static void xdgshellv6ping(void *, struct zxdg_shell_v6 *, uint32_t);
+static void xdgsurfv6configure(void *, struct zxdg_surface_v6 *, uint32_t);
+static void xdgsurfconfigure(void *, struct xdg_surface *, int32_t, int32_t,
+                             struct wl_array *, uint32_t);
+static void xdgsurfclose(void *, struct xdg_surface *);
+static void xdgtopconfigure(void *, struct zxdg_toplevel_v6 *, int32_t, int32_t,
+                            struct wl_array *);
+static void xdgtopclose(void *, struct zxdg_toplevel_v6 *);
+static void xdgshellping(void *, struct xdg_shell *, uint32_t);
+static void datadevoffer(void *, struct wl_data_device *,
+                         struct wl_data_offer *);
+static void datadeventer(void *, struct wl_data_device *, uint32_t,
+                         struct wl_surface *, wl_fixed_t, wl_fixed_t,
+                         struct wl_data_offer *);
+static void datadevleave(void *, struct wl_data_device *);
+static void datadevmotion(void *, struct wl_data_device *, uint32_t,
+                          wl_fixed_t x, wl_fixed_t y);
+static void datadevdrop(void *, struct wl_data_device *);
+static void datadevselection(void *, struct wl_data_device *,
+                             struct wl_data_offer *);
+static void dataofferoffer(void *, struct wl_data_offer *, const char *);
+static void datasrctarget(void *, struct wl_data_source *, const char *);
+static void datasrcsend(void *, struct wl_data_source *, const char *, int32_t);
+static void datasrccancelled(void *, struct wl_data_source *);
+
+static void selinit(void);
+static void selnormalize(void);
+static inline int selected(int, int);
+static char *getsel(void);
+static void selcopy(uint32_t);
+static void selscroll(int, int);
+static void selsnap(int *, int *, int);
+static int x2col(int);
+static int y2row(int);
+
+static size_t utf8decode(char *, Rune *, size_t);
+static Rune utf8decodebyte(char, size_t *);
+static size_t utf8encode(Rune, char *);
+static char utf8encodebyte(Rune, size_t);
+static char *utf8strchr(char *s, Rune u);
+static size_t utf8validate(Rune *, size_t);
+
+static ssize_t xwrite(int, const char *, size_t);
+static void *xmalloc(size_t);
+static void *xrealloc(void *, size_t);
+static char *xstrdup(char *);
+
+static void usage(void);
+
+static struct wl_registry_listener reglistener = {regglobal, regglobalremove};
+static struct wl_surface_listener surflistener = {surfenter, surfleave};
+static struct wl_callback_listener framelistener = {framedone};
+static struct wl_keyboard_listener kbdlistener = {
+    kbdkeymap, kbdenter, kbdleave, kbdkey, kbdmodifiers, kbdrepeatinfo};
+static struct wl_pointer_listener ptrlistener = {ptrenter, ptrleave, ptrmotion,
+                                                 ptrbutton, ptraxis};
+static struct zxdg_shell_v6_listener shell_v6_listener = {xdgshellv6ping};
+static struct zxdg_surface_v6_listener surf_v6_listener = {xdgsurfv6configure};
+static struct xdg_shell_listener shell_listener = {xdgshellping};
+static struct wl_shell_surface_listener shellsurf_listener = {
+    shellsurfping, shellsurfconfigure, shellsurfpopupdone};
+static struct xdg_surface_listener xdgsurflistener = {xdgsurfconfigure,
+                                                      xdgsurfclose};
+static struct zxdg_toplevel_v6_listener xdgtoplevellistener = {xdgtopconfigure,
+                                                               xdgtopclose};
+static struct wl_data_device_listener datadevlistener = {
+    datadevoffer,  datadeventer, datadevleave,
+    datadevmotion, datadevdrop,  datadevselection};
+static struct wl_data_offer_listener dataofferlistener = {dataofferoffer};
+static struct wl_data_source_listener datasrclistener = {
+    datasrctarget, datasrcsend, datasrccancelled};
+
+/* Globals */
+static DC dc;
+static Wayland wl;
+static WLD wld;
+static Cursor cursor;
+static Term term;
+static CSIEscape csiescseq;
+static STREscape strescseq;
+static int cmdfd;
+static pid_t pid;
+static Selection sel;
+static Repeat repeat;
+static bool needdraw = true;
+static int iofd = 1;
+static char **opt_cmd = NULL;
+static char *opt_io = NULL;
+static char *opt_title = 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 int oldx, oldy;
+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 {
+  struct wld_font *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;
+
+ssize_t xwrite(int fd, const char *s, size_t len) {
+  size_t aux = len;
+  ssize_t r;
+
+  while (len > 0) {
+    r = write(fd, s, len);
+    if (r < 0)
+      return r;
+    len -= r;
+    s += r;
+  }
+
+  return aux;
+}
+
+void *xmalloc(size_t len) {
+  void *p = malloc(len);
+
+  if (!p)
+    die("Out of memory\n");
+
+  return p;
+}
+
+void *xrealloc(void *p, size_t len) {
+  if ((p = realloc(p, len)) == NULL)
+    die("Out of memory\n");
+
+  return p;
+}
+
+char *xstrdup(char *s) {
+  if ((s = strdup(s)) == NULL)
+    die("Out of memory\n");
+
+  return s;
+}
+
+size_t utf8decode(char *c, Rune *u, size_t clen) {
+  size_t i, j, len, type;
+  Rune udecoded;
+
+  *u = UTF_INVALID;
+  if (!clen)
+    return 0;
+  udecoded = utf8decodebyte(c[0], &len);
+  if (!BETWEEN(len, 1, UTF_SIZ))
+    return 1;
+  for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
+    udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
+    if (type != 0)
+      return j;
+  }
+  if (j < len)
+    return 0;
+  *u = udecoded;
+  utf8validate(u, len);
+
+  return len;
+}
+
+Rune utf8decodebyte(char c, size_t *i) {
+  for (*i = 0; *i < LEN(utfmask); ++(*i))
+    if (((uchar)c & utfmask[*i]) == utfbyte[*i])
+      return (uchar)c & ~utfmask[*i];
+
+  return 0;
+}
+
+size_t utf8encode(Rune u, char *c) {
+  size_t len, i;
+
+  len = utf8validate(&u, 0);
+  if (len > UTF_SIZ)
+    return 0;
+
+  for (i = len - 1; i != 0; --i) {
+    c[i] = utf8encodebyte(u, 0);
+    u >>= 6;
+  }
+  c[0] = utf8encodebyte(u, len);
+
+  return len;
+}
+
+char utf8encodebyte(Rune u, size_t 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 utf8validate(Rune *u, size_t i) {
+  if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
+    *u = UTF_INVALID;
+  for (i = 1; *u > utfmax[i]; ++i)
+    ;
+
+  return i;
+}
+
+void selinit(void) {
+  sel.tclick1 = 0;
+  sel.tclick2 = 0;
+  sel.mode = SEL_IDLE;
+  sel.ob.x = -1;
+  sel.primary = NULL;
+  sel.source = NULL;
+}
+
+int x2col(int x) {
+  x -= borderpx;
+  x /= wl.cw;
+
+  return LIMIT(x, 0, term.col - 1);
+}
+
+int y2row(int y) {
+  y -= borderpx;
+  y /= wl.ch;
+
+  return LIMIT(y, 0, term.row - 1);
+}
+
+int tlinelen(int y) {
+  int i = term.col;
+
+  if (term.line[y][i - 1].mode & ATTR_WRAP)
+    return i;
+
+  while (i > 0 && term.line[y][i - 1].u == ' ')
+    --i;
+
+  return i;
+}
+
+void selnormalize(void) {
+  int i;
+
+  if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
+    sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
+    sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
+  } else {
+    sel.nb.x = MIN(sel.ob.x, sel.oe.x);
+    sel.ne.x = MAX(sel.ob.x, sel.oe.x);
+  }
+  sel.nb.y = MIN(sel.ob.y, sel.oe.y);
+  sel.ne.y = MAX(sel.ob.y, sel.oe.y);
+
+  selsnap(&sel.nb.x, &sel.nb.y, -1);
+  selsnap(&sel.ne.x, &sel.ne.y, +1);
+
+  /* expand selection over line breaks */
+  if (sel.type == SEL_RECTANGULAR)
+    return;
+  i = tlinelen(sel.nb.y);
+  if (i < sel.nb.x)
+    sel.nb.x = i;
+  if (tlinelen(sel.ne.y) <= sel.ne.x)
+    sel.ne.x = term.col - 1;
+}
+
+int selected(int x, int y) {
+  if (sel.mode == SEL_EMPTY)
+    return 0;
+
+  if (sel.type == SEL_RECTANGULAR)
+    return BETWEEN(y, sel.nb.y, sel.ne.y) && BETWEEN(x, sel.nb.x, sel.ne.x);
+
+  return BETWEEN(y, sel.nb.y, sel.ne.y) && (y != sel.nb.y || x >= sel.nb.x) &&
+         (y != sel.ne.y || x <= sel.ne.x);
+}
+
+void selsnap(int *x, int *y, int direction) {
+  int newx, newy, xt, yt;
+  int delim, prevdelim;
+  Glyph *gp, *prevgp;
+
+  switch (sel.snap) {
+  case SNAP_WORD:
+    /*
+     * Snap around if the word wraps around at the end or
+     * beginning of a line.
+     */
+    prevgp = &term.line[*y][*x];
+    prevdelim = ISDELIM(prevgp->u);
+    for (;;) {
+      newx = *x + direction;
+      newy = *y;
+      if (!BETWEEN(newx, 0, term.col - 1)) {
+        newy += direction;
+        newx = (newx + term.col) % term.col;
+        if (!BETWEEN(newy, 0, term.row - 1))
+          break;
+
+        if (direction > 0)
+          yt = *y, xt = *x;
+        else
+          yt = newy, xt = newx;
+        if (!(term.line[yt][xt].mode & ATTR_WRAP))
+          break;
+      }
+
+      if (newx >= tlinelen(newy))
+        break;
+
+      gp = &term.line[newy][newx];
+      delim = ISDELIM(gp->u);
+      if (!(gp->mode & ATTR_WDUMMY) &&
+          (delim != prevdelim || (delim && gp->u != prevgp->u)))
+        break;
+
+      *x = newx;
+      *y = newy;
+      prevgp = gp;
+      prevdelim = delim;
+    }
+    break;
+  case SNAP_LINE:
+    /*
+     * Snap around if the the previous line or the current one
+     * has set ATTR_WRAP at its end. Then the whole next or
+     * previous line will be selected.
+     */
+    *x = (direction < 0) ? 0 : term.col - 1;
+    if (direction < 0) {
+      for (; *y > 0; *y += direction) {
+        if (!(term.line[*y - 1][term.col - 1].mode & ATTR_WRAP)) {
+          break;
+        }
+      }
+    } else if (direction > 0) {
+      for (; *y < term.row - 1; *y += direction) {
+        if (!(term.line[*y][term.col - 1].mode & ATTR_WRAP)) {
+          break;
+        }
+      }
+    }
+    break;
+  }
+}
+
+void getbuttoninfo(void) {
+  int type;
+  uint state = wl.xkb.mods & ~forceselmod;
+
+  sel.alt = IS_SET(MODE_ALTSCREEN);
+
+  sel.oe.x = x2col(wl.px);
+  sel.oe.y = y2row(wl.py);
+  selnormalize();
+
+  sel.type = SEL_REGULAR;
+  for (type = 1; type < LEN(selmasks); ++type) {
+    if (match(selmasks[type], state)) {
+      sel.type = type;
+      break;
+    }
+  }
+}
+
+void wlmousereport(int button, bool release, int x, int y) {
+  int len;
+  char buf[40];
+
+  if (!IS_SET(MODE_MOUSEX10)) {
+    button += ((wl.xkb.mods & MOD_MASK_SHIFT) ? 4 : 0) +
+              ((wl.xkb.mods & MOD_MASK_LOGO) ? 8 : 0) +
+              ((wl.xkb.mods & MOD_MASK_CTRL) ? 16 : 0);
+  }
+
+  if (IS_SET(MODE_MOUSESGR)) {
+    len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c", button, x + 1, y + 1,
+                   release ? '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 wlmousereportbutton(uint32_t button, uint32_t state) {
+  bool release = state == WL_POINTER_BUTTON_STATE_RELEASED;
+
+  if (!IS_SET(MODE_MOUSESGR) && release) {
+    button = 3;
+  } else {
+    switch (button) {
+    case BTN_LEFT:
+      button = 0;
+      break;
+    case BTN_MIDDLE:
+      button = 1;
+      break;
+    case BTN_RIGHT:
+      button = 2;
+      break;
+    }
+  }
+
+  oldbutton = release ? 3 : button;
+
+  /* don't report release events when in X10 mode */
+  if (IS_SET(MODE_MOUSEX10) && release) {
+    return;
+  }
+
+  wlmousereport(button, release, oldx, oldy);
+}
+
+void wlmousereportmotion(wl_fixed_t fx, wl_fixed_t fy) {
+  int x = x2col(wl_fixed_to_int(fx)), y = y2row(wl_fixed_to_int(fy));
+
+  if (x == oldx && y == oldy)
+    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;
+
+  oldx = x;
+  oldy = y;
+  wlmousereport(oldbutton + 32, false, x, y);
+}
+
+void wlmousereportaxis(uint32_t axis, wl_fixed_t amount) {
+  wlmousereport(64 + (axis == AXIS_VERTICAL ? 4 : 6) + (amount > 0 ? 1 : 0),
+                false, oldx, oldy);
+}
+
+char *getsel(void) {
+  char *str, *ptr;
+  int y, bufsize, lastx, linelen;
+  Glyph *gp, *last;
+
+  if (sel.ob.x == -1)
+    return NULL;
+
+  bufsize = (term.col + 1) * (sel.ne.y - sel.nb.y + 1) * UTF_SIZ;
+  ptr = str = xmalloc(bufsize);
+
+  /* append every set & selected glyph to the selection */
+  for (y = sel.nb.y; y <= sel.ne.y; y++) {
+    linelen = tlinelen(y);
+
+    if (sel.type == SEL_RECTANGULAR) {
+      gp = &term.line[y][sel.nb.x];
+      lastx = sel.ne.x;
+    } else {
+      gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
+      lastx = (sel.ne.y == y) ? sel.ne.x : term.col - 1;
+    }
+    last = &term.line[y][MIN(lastx, linelen - 1)];
+    while (last >= gp && last->u == ' ')
+      --last;
+
+    for (; gp <= last; ++gp) {
+      if (gp->mode & ATTR_WDUMMY)
+        continue;
+
+      ptr += utf8encode(gp->u, ptr);
+    }
+
+    /*
+     * Copy and pasting of line endings is inconsistent
+     * in the inconsistent terminal and GUI world.
+     * The best solution seems like to produce '\n' when
+     * something is copied from wterm and convert '\n' to
+     * '\r', when something to be pasted is received by
+     * wterm.
+     * FIXME: Fix the computer world.
+     */
+    if ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
+      *ptr++ = '\n';
+  }
+  *ptr = 0;
+  return str;
+}
+
+void selcopy(uint32_t serial) { wlsetsel(getsel(), serial); }
+
+static inline void selwritebuf(char *buf, int len) {
+  char *repl = buf;
+
+  /*
+   * 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.
+   */
+  while ((repl = memchr(repl, '\n', len))) {
+    *repl++ = '\r';
+  }
+
+  if (IS_SET(MODE_BRCKTPASTE))
+    ttywrite("\033[200~", 6);
+  ttysend(buf, len);
+  if (IS_SET(MODE_BRCKTPASTE))
+    ttywrite("\033[201~", 6);
+}
+
+void selpaste(const Arg *dummy) {
+  int fds[2], len, left;
+  char buf[BUFSIZ], *str;
+
+  if (wl.seloffer) {
+    /* check if we are pasting from ourselves */
+    if (sel.source) {
+      str = sel.primary;
+      left = strlen(sel.primary);
+      while (left > 0) {
+        len = MIN(sizeof buf, left);
+        memcpy(buf, str, len);
+        selwritebuf(buf, len);
+        left -= len;
+        str += len;
+      }
+    } else {
+      pipe(fds);
+      wl_data_offer_receive(wl.seloffer, "text/plain", fds[1]);
+      wl_display_flush(wl.dpy);
+      close(fds[1]);
+      while ((len = read(fds[0], buf, sizeof buf)) > 0) {
+        selwritebuf(buf, len);
+      }
+      close(fds[0]);
+    }
+  }
+}
+
+void selclear(void) {
+  if (sel.ob.x == -1)
+    return;
+  sel.mode = SEL_IDLE;
+  sel.ob.x = -1;
+  tsetdirt(sel.nb.y, sel.ne.y);
+}
+
+void wlsetsel(char *str, uint32_t serial) {
+  free(sel.primary);
+  sel.primary = str;
+
+  if (str) {
+    sel.source = wl_data_device_manager_create_data_source(wl.datadevmanager);
+    wl_data_source_add_listener(sel.source, &datasrclistener, NULL);
+    wl_data_source_offer(sel.source, "text/plain; charset=utf-8");
+  } else {
+    sel.source = NULL;
+  }
+  wl_data_device_set_selection(wl.datadev, sel.source, serial);
+}
+
+void die(const char *errstr, ...) {
+  va_list ap;
+
+  va_start(ap, errstr);
+  vfprintf(stdout, errstr, ap);
+  va_end(ap);
+  exit(1);
+}
+
+void execsh(void) {
+  char **args, *sh, *prog;
+  const struct passwd *pw;
+
+  errno = 0;
+  if ((pw = getpwuid(getuid())) == NULL) {
+    if (errno)
+      die("getpwuid:%s\n", strerror(errno));
+    else
+      die("who are you?\n");
+  }
+
+  if ((sh = getenv("SHELL")) == NULL)
+    sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
+
+  if (opt_cmd)
+    prog = opt_cmd[0];
+  else if (utmp)
+    prog = utmp;
+  else
+    prog = sh;
+  args = (opt_cmd) ? opt_cmd : (char *[]){prog, NULL};
+
+  unsetenv("COLUMNS");
+  unsetenv("LINES");
+  unsetenv("TERMCAP");
+  setenv("LOGNAME", pw->pw_name, 1);
+  setenv("USER", pw->pw_name, 1);
+  setenv("SHELL", sh, 1);
+  setenv("HOME", pw->pw_dir, 1);
+  setenv("TERM", termname, 1);
+
+  signal(SIGCHLD, SIG_DFL);
+  signal(SIGHUP, SIG_DFL);
+  signal(SIGINT, SIG_DFL);
+  signal(SIGQUIT, SIG_DFL);
+  signal(SIGTERM, SIG_DFL);
+  signal(SIGALRM, SIG_DFL);
+
+  execvp(prog, args);
+  _exit(1);
+}
+
+void sigchld(int a) {
+  int stat;
+  pid_t p;
+
+  if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
+    die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
+
+  if (pid != p)
+    return;
+
+  if (!WIFEXITED(stat) || WEXITSTATUS(stat))
+    die("child finished with error '%d'\n", stat);
+  exit(0);
+}
+
+void stty(void) {
+  char cmd[_POSIX_ARG_MAX], **p, *q, *s;
+  size_t n, siz;
+
+  if ((n = strlen(stty_args)) > sizeof(cmd) - 1)
+    die("incorrect stty parameters\n");
+  memcpy(cmd, stty_args, n);
+  q = cmd + n;
+  siz = sizeof(cmd) - n;
+  for (p = opt_cmd; p && (s = *p); ++p) {
+    if ((n = strlen(s)) > siz - 1)
+      die("stty parameter length too long\n");
+    *q++ = ' ';
+    q = memcpy(q, s, n);
+    q += n;
+    siz -= n + 1;
+  }
+  *q = '\0';
+  if (system(cmd) != 0)
+    perror("Couldn't call stty");
+}
+
+void ttynew(void) {
+  int m, s;
+  struct winsize w = {term.row, term.col, 0, 0};
+
+  if (opt_io) {
+    term.mode |= MODE_PRINT;
+    iofd = (!strcmp(opt_io, "-")) ? 1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
+    if (iofd < 0) {
+      fprintf(stderr, "Error opening %s:%s\n", opt_io, strerror(errno));
+    }
+  }
+
+  if (opt_line) {
+    if ((cmdfd = open(opt_line, O_RDWR)) < 0)
+      die("open line failed: %s\n", strerror(errno));
+    close(0);
+    dup(cmdfd);
+    stty();
+    return;
+  }
+
+  /* seems to work fine on linux, openbsd and freebsd */
+  if (openpty(&m, &s, NULL, NULL, &w) < 0)
+    die("openpty failed: %s\n", strerror(errno));
+
+  switch (pid = fork()) {
+  case -1:
+    die("fork failed\n");
+    break;
+  case 0:
+    close(iofd);
+    setsid(); /* create a new process group */
+    dup2(s, 0);
+    dup2(s, 1);
+    dup2(s, 2);
+    if (ioctl(s, TIOCSCTTY, NULL) < 0)
+      die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
+    close(s);
+    close(m);
+    execsh();
+    break;
+  default:
+    close(s);
+    cmdfd = m;
+    signal(SIGCHLD, sigchld);
+    break;
+  }
+}
+
+void ttyread(void) {
+  static char buf[BUFSIZ];
+  static int buflen = 0;
+  char *ptr;
+  int charsize; /* size of utf8 char in bytes */
+  Rune unicodep;
+  int ret;
+
+  /* append read bytes to unprocessed bytes */
+  if ((ret = read(cmdfd, buf + buflen, LEN(buf) - buflen)) < 0)
+    die("Couldn't read from shell: %s\n", strerror(errno));
+
+  /* process every complete utf8 char */
+  buflen += ret;
+  ptr = buf;
+  while ((charsize = utf8decode(ptr, &unicodep, buflen))) {
+    tputc(unicodep);
+    ptr += charsize;
+    buflen -= charsize;
+  }
+
+  /* keep any uncomplete utf8 char for the next call */
+  memmove(buf, ptr, buflen);
+  needdraw = true;
+}
+
+void ttywrite(const char *s, size_t n) {
+  fd_set wfd;
+  struct timespec tv;
+  ssize_t r;
+
+  /*
+   * Remember that we are using a pty, which might be a modem line.
+   * Writing too much will clog the line. That's why we are doing this
+   * dance.
+   * FIXME: Migrate the world to Plan 9.
+   */
+  while (n > 0) {
+    FD_ZERO(&wfd);
+    FD_SET(cmdfd, &wfd);
+    tv.tv_sec = 0;
+    tv.tv_nsec = 0;
+
+    /* Check if we can write. */
+    if (pselect(cmdfd + 1, NULL, &wfd, NULL, &tv, NULL) < 0) {
+      if (errno == EINTR)
+        continue;
+      die("select failed: %s\n", strerror(errno));
+    }
+    if (!FD_ISSET(cmdfd, &wfd)) {
+      /* No, then free some buffer space. */
+      ttyread();
+    } else {
+      /*
+       * Only write 256 bytes at maximum. This seems to be a
+       * reasonable value for a serial line. Bigger values
+       * might clog the I/O.
+       */
+      r = write(cmdfd, s, (n < 256) ? n : 256);
+      if (r < 0) {
+        die("write error on tty: %s\n", strerror(errno));
+      }
+      if (r < n) {
+        /*
+         * We weren't able to write out everything.
+         * This means the buffer is getting full
+         * again. Empty it.
+         */
+        ttyread();
+        n -= r;
+        s += r;
+      } else {
+        /* All bytes have been written. */
+        break;
+      }
+    }
+  }
+}
+
+void ttysend(char *s, size_t n) {
+  int len;
+  Rune u;
+
+  ttywrite(s, n);
+  if (IS_SET(MODE_ECHO))
+    while ((len = utf8decode(s, &u, n)) > 0) {
+      techo(u);
+      n -= len;
+      s += len;
+    }
+}
+
+void ttyresize(void) {
+  struct winsize w;
+
+  w.ws_row = term.row;
+  w.ws_col = term.col;
+  w.ws_xpixel = wl.tw;
+  w.ws_ypixel = wl.th;
+  if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
+    fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
+}
+
+int tattrset(int attr) {
+  int i, j;
+
+  for (i = 0; i < term.row - 1; i++) {
+    for (j = 0; j < term.col - 1; j++) {
+      if (term.line[i][j].mode & attr)
+        return 1;
+    }
+  }
+
+  return 0;
+}
+
+void tsetdirt(int top, int bot) {
+  int i;
+
+  LIMIT(top, 0, term.row - 1);
+  LIMIT(bot, 0, term.row - 1);
+
+  for (i = top; i <= bot; i++)
+    term.dirty[i] = 1;
+
+  needdraw = true;
+}
+
+void tsetdirtattr(int attr) {
+  int i, j;
+
+  for (i = 0; i < term.row - 1; i++) {
+    for (j = 0; j < term.col - 1; j++) {
+      if (term.line[i][j].mode & attr) {
+        tsetdirt(i, i);
+        break;
+      }
+    }
+  }
+}
+
+void tfulldirt(void) { tsetdirt(0, term.row - 1); }
+
+void tcursor(int mode) {
+  static TCursor c[2];
+  int alt = IS_SET(MODE_ALTSCREEN);
+
+  if (mode == CURSOR_SAVE) {
+    c[alt] = term.c;
+  } else if (mode == CURSOR_LOAD) {
+    term.c = c[alt];
+    tmoveto(c[alt].x, c[alt].y);
+  }
+}
+
+void treset(void) {
+  uint i;
+
+  term.c = (TCursor){{.mode = ATTR_NULL, .fg = defaultfg, .bg = defaultbg},
+                     .x = 0,
+                     .y = 0,
+                     .state = CURSOR_DEFAULT};
+
+  memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+  for (i = tabspaces; i < term.col; i += tabspaces)
+    term.tabs[i] = 1;
+  term.top = 0;
+  term.bot = term.row - 1;
+  term.mode = MODE_WRAP;
+  memset(term.trantbl, CS_USA, sizeof(term.trantbl));
+  term.charset = 0;
+
+  for (i = 0; i < 2; i++) {
+    tmoveto(0, 0);
+    tcursor(CURSOR_SAVE);
+    tclearregion(0, 0, term.col - 1, term.row - 1);
+    tswapscreen();
+  }
+}
+
+void tnew(int col, int row) {
+  term = (Term){.c = {.attr = {.fg = defaultfg, .bg = defaultbg}}};
+  tresize(col, row);
+  term.numlock = 1;
+
+  treset();
+}
+
+void tswapscreen(void) {
+  Line *tmp = term.line;
+
+  term.line = term.alt;
+  term.alt = tmp;
+  term.mode ^= MODE_ALTSCREEN;
+  tfulldirt();
+}
+
+void tscrolldown(int orig, int n) {
+  int i;
+  Line temp;
+
+  LIMIT(n, 0, term.bot - orig + 1);
+
+  tsetdirt(orig, term.bot - n);
+  tclearregion(0, term.bot - n + 1, term.col - 1, term.bot);
+
+  for (i = term.bot; i >= orig + n; i--) {
+    temp = term.line[i];
+    term.line[i] = term.line[i - n];
+    term.line[i - n] = temp;
+  }
+
+  selscroll(orig, n);
+}
+
+void tscrollup(int orig, int n) {
+  int i;
+  Line temp;
+
+  LIMIT(n, 0, term.bot - orig + 1);
+
+  tclearregion(0, orig, term.col - 1, orig + n - 1);
+  tsetdirt(orig + n, term.bot);
+
+  for (i = orig; i <= term.bot - n; i++) {
+    temp = term.line[i];
+    term.line[i] = term.line[i + n];
+    term.line[i + n] = temp;
+  }
+
+  selscroll(orig, -n);
+}
+
+void selscroll(int orig, int n) {
+  if (sel.ob.x == -1)
+    return;
+
+  if (BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
+    if ((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
+      selclear();
+      return;
+    }
+    if (sel.type == SEL_RECTANGULAR) {
+      if (sel.ob.y < term.top)
+        sel.ob.y = term.top;
+      if (sel.oe.y > term.bot)
+        sel.oe.y = term.bot;
+    } else {
+      if (sel.ob.y < term.top) {
+        sel.ob.y = term.top;
+        sel.ob.x = 0;
+      }
+      if (sel.oe.y > term.bot) {
+        sel.oe.y = term.bot;
+        sel.oe.x = term.col;
+      }
+    }
+    selnormalize();
+  }
+}
+
+void tnewline(int first_col) {
+  int y = term.c.y;
+
+  if (y == term.bot) {
+    tscrollup(term.top, 1);
+  } else {
+    y++;
+  }
+  tmoveto(first_col ? 0 : term.c.x, y);
+}
+
+void csiparse(void) {
+  char *p = csiescseq.buf, *np;
+  long int v;
+
+  csiescseq.narg = 0;
+  if (*p == '?') {
+    csiescseq.priv = 1;
+    p++;
+  }
+
+  csiescseq.buf[csiescseq.len] = '\0';
+  while (p < csiescseq.buf + csiescseq.len) {
+    np = NULL;
+    v = strtol(p, &np, 10);
+    if (np == p)
+      v = 0;
+    if (v == LONG_MAX || v == LONG_MIN)
+      v = -1;
+    csiescseq.arg[csiescseq.narg++] = v;
+    p = np;
+    if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
+      break;
+    p++;
+  }
+  csiescseq.mode[0] = *p++;
+  csiescseq.mode[1] = (p < csiescseq.buf + csiescseq.len) ? *p : '\0';
+}
+
+/* for absolute user moves, when decom is set */
+void tmoveato(int x, int y) {
+  tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top : 0));
+}
+
+void tmoveto(int x, int y) {
+  int miny, maxy;
+
+  if (term.c.state & CURSOR_ORIGIN) {
+    miny = term.top;
+    maxy = term.bot;
+  } else {
+    miny = 0;
+    maxy = term.row - 1;
+  }
+  term.c.state &= ~CURSOR_WRAPNEXT;
+  term.c.x = LIMIT(x, 0, term.col - 1);
+  term.c.y = LIMIT(y, miny, maxy);
+}
+
+void tsetchar(Rune u, Glyph *attr, int x, int y) {
+  static char *vt100_0[62] = {
+      /* 0x41 - 0x7e */
+      "↑", "↓", "→", "←", "█", "▚", "☃",      /* A - G */
+      0,   0,   0,   0,   0,   0,   0,   0,   /* H - O */
+      0,   0,   0,   0,   0,   0,   0,   0,   /* P - W */
+      0,   0,   0,   0,   0,   0,   0,   " ", /* X - _ */
+      "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
+      "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
+      "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
+      "│", "≤", "≥", "π", "≠", "£", "·",      /* x - ~ */
+  };
+
+  /*
+   * The table is proudly stolen from rxvt.
+   */
+  if (term.trantbl[term.charset] == CS_GRAPHIC0 && BETWEEN(u, 0x41, 0x7e) &&
+      vt100_0[u - 0x41])
+    utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
+
+  if (term.line[y][x].mode & ATTR_WIDE) {
+    if (x + 1 < term.col) {
+      term.line[y][x + 1].u = ' ';
+      term.line[y][x + 1].mode &= ~ATTR_WDUMMY;
+    }
+  } else if (term.line[y][x].mode & ATTR_WDUMMY) {
+    term.line[y][x - 1].u = ' ';
+    term.line[y][x - 1].mode &= ~ATTR_WIDE;
+  }
+
+  term.dirty[y] = 1;
+  term.line[y][x] = *attr;
+  term.line[y][x].u = u;
+}
+
+void tclearregion(int x1, int y1, int x2, int y2) {
+  int x, y, temp;
+  Glyph *gp;
+
+  if (x1 > x2)
+    temp = x1, x1 = x2, x2 = temp;
+  if (y1 > y2)
+    temp = y1, y1 = y2, y2 = temp;
+
+  LIMIT(x1, 0, term.col - 1);
+  LIMIT(x2, 0, term.col - 1);
+  LIMIT(y1, 0, term.row - 1);
+  LIMIT(y2, 0, term.row - 1);
+
+  for (y = y1; y <= y2; y++) {
+    term.dirty[y] = 1;
+    for (x = x1; x <= x2; x++) {
+      gp = &term.line[y][x];
+      if (selected(x, y))
+        selclear();
+      gp->fg = term.c.attr.fg;
+      gp->bg = term.c.attr.bg;
+      gp->mode = 0;
+      gp->u = ' ';
+    }
+  }
+}
+
+void tdeletechar(int n) {
+  int dst, src, size;
+  Glyph *line;
+
+  LIMIT(n, 0, term.col - term.c.x);
+
+  dst = term.c.x;
+  src = term.c.x + n;
+  size = term.col - src;
+  line = term.line[term.c.y];
+
+  memmove(&line[dst], &line[src], size * sizeof(Glyph));
+  tclearregion(term.col - n, term.c.y, term.col - 1, term.c.y);
+}
+
+void tinsertblank(int n) {
+  int dst, src, size;
+  Glyph *line;
+
+  LIMIT(n, 0, term.col - term.c.x);
+
+  dst = term.c.x + n;
+  src = term.c.x;
+  size = term.col - dst;
+  line = term.line[term.c.y];
+
+  memmove(&line[dst], &line[src], size * sizeof(Glyph));
+  tclearregion(src, term.c.y, dst - 1, term.c.y);
+}
+
+void tinsertblankline(int n) {
+  if (BETWEEN(term.c.y, term.top, term.bot))
+    tscrolldown(term.c.y, n);
+}
+
+void tdeleteline(int n) {
+  if (BETWEEN(term.c.y, term.top, term.bot))
+    tscrollup(term.c.y, n);
+}
+
+uint32_t tdefcolor(int *attr, int *npar, int l) {
+  int32_t idx = -1;
+  uint r, g, b;
+
+  switch (attr[*npar + 1]) {
+  case 2: /* direct color in RGB space */
+    if (*npar + 4 >= l) {
+      fprintf(stderr, "erresc(38): Incorrect number of parameters (%d)\n",
+              *npar);
+      break;
+    }
+    r = attr[*npar + 2];
+    g = attr[*npar + 3];
+    b = attr[*npar + 4];
+    *npar += 4;
+    if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
+      fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n", r, g, b);
+    else
+      idx = TRUECOLOR(r, g, b);
+    break;
+  case 5: /* indexed color */
+    if (*npar + 2 >= l) {
+      fprintf(stderr, "erresc(38): Incorrect number of parameters (%d)\n",
+              *npar);
+      break;
+    }
+    *npar += 2;
+    if (!BETWEEN(attr[*npar], 0, 255))
+      fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
+    else
+      idx = attr[*npar];
+    break;
+  case 0: /* implemented defined (only foreground) */
+  case 1: /* transparent */
+  case 3: /* direct color in CMY space */
+  case 4: /* direct color in CMYK space */
+  default:
+    fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[*npar]);
+    break;
+  }
+
+  return idx;
+}
+
+void tsetattr(int *attr, int l) {
+  int i;
+  uint32_t idx;
+
+  for (i = 0; i < l; i++) {
+    switch (attr[i]) {
+    case 0:
+      term.c.attr.mode &=
+          ~(ATTR_BOLD | ATTR_FAINT | ATTR_ITALIC | ATTR_UNDERLINE | ATTR_BLINK |
+            ATTR_REVERSE | ATTR_INVISIBLE | ATTR_STRUCK);
+      term.c.attr.fg = defaultfg;
+      term.c.attr.bg = defaultbg;
+      break;
+    case 1:
+      term.c.attr.mode |= ATTR_BOLD;
+      break;
+    case 2:
+      term.c.attr.mode |= ATTR_FAINT;
+      break;
+    case 3:
+      term.c.attr.mode |= ATTR_ITALIC;
+      break;
+    case 4:
+      term.c.attr.mode |= ATTR_UNDERLINE;
+      break;
+    case 5: /* slow blink */
+            /* FALLTHROUGH */
+    case 6: /* rapid blink */
+      term.c.attr.mode |= ATTR_BLINK;
+      break;
+    case 7:
+      term.c.attr.mode |= ATTR_REVERSE;
+      break;
+    case 8:
+      term.c.attr.mode |= ATTR_INVISIBLE;
+      break;
+    case 9:
+      term.c.attr.mode |= ATTR_STRUCK;
+      break;
+    case 22:
+      term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
+      break;
+    case 23:
+      term.c.attr.mode &= ~ATTR_ITALIC;
+      break;
+    case 24:
+      term.c.attr.mode &= ~ATTR_UNDERLINE;
+      break;
+    case 25:
+      term.c.attr.mode &= ~ATTR_BLINK;
+      break;
+    case 27:
+      term.c.attr.mode &= ~ATTR_REVERSE;
+      break;
+    case 28:
+      term.c.attr.mode &= ~ATTR_INVISIBLE;
+      break;
+    case 29:
+      term.c.attr.mode &= ~ATTR_STRUCK;
+      break;
+    case 38:
+      if ((idx = tdefcolor(attr, &i, l)) >= 0)
+        term.c.attr.fg = idx;
+      break;
+    case 39:
+      term.c.attr.fg = defaultfg;
+      break;
+    case 48:
+      if ((idx = tdefcolor(attr, &i, l)) >= 0)
+        term.c.attr.bg = idx;
+      break;
+    case 49:
+      term.c.attr.bg = defaultbg;
+      break;
+    default:
+      if (BETWEEN(attr[i], 30, 37)) {
+        term.c.attr.fg = attr[i] - 30;
+      } else if (BETWEEN(attr[i], 40, 47)) {
+        term.c.attr.bg = attr[i] - 40;
+      } else if (BETWEEN(attr[i], 90, 97)) {
+        term.c.attr.fg = attr[i] - 90 + 8;
+      } else if (BETWEEN(attr[i], 100, 107)) {
+        term.c.attr.bg = attr[i] - 100 + 8;
+      } else {
+        fprintf(stderr, "erresc(default): gfx attr %d unknown\n", attr[i]),
+            csidump();
+      }
+      break;
+    }
+  }
+}
+
+void tsetscroll(int t, int b) {
+  int temp;
+
+  LIMIT(t, 0, term.row - 1);
+  LIMIT(b, 0, term.row - 1);
+  if (t > b) {
+    temp = t;
+    t = b;
+    b = temp;
+  }
+  term.top = t;
+  term.bot = b;
+}
+
+void tsetmode(int priv, int set, int *args, int narg) {
+  int *lim, mode;
+  int alt;
+
+  for (lim = args + narg; args < lim; ++args) {
+    if (priv) {
+      switch (*args) {
+      case 1: /* DECCKM -- Cursor key */
+        MODBIT(term.mode, set, MODE_APPCURSOR);
+        break;
+      case 5: /* DECSCNM -- Reverse video */
+        mode = term.mode;
+        MODBIT(term.mode, set, MODE_REVERSE);
+        if (mode != term.mode)
+          redraw();
+        break;
+      case 6: /* DECOM -- Origin */
+        MODBIT(term.c.state, set, CURSOR_ORIGIN);
+        tmoveato(0, 0);
+        break;
+      case 7: /* DECAWM -- Auto wrap */
+        MODBIT(term.mode, set, MODE_WRAP);
+        break;
+      case 0:  /* Error (IGNORED) */
+      case 2:  /* DECANM -- ANSI/VT52 (IGNORED) */
+      case 3:  /* DECCOLM -- Column  (IGNORED) */
+      case 4:  /* DECSCLM -- Scroll (IGNORED) */
+      case 8:  /* DECARM -- Auto repeat (IGNORED) */
+      case 18: /* DECPFF -- Printer feed (IGNORED) */
+      case 19: /* DECPEX -- Printer extent (IGNORED) */
+      case 42: /* DECNRCM -- National characters (IGNORED) */
+      case 12: /* att610 -- Start blinking cursor (IGNORED) */
+        break;
+      case 25: /* DECTCEM -- Text Cursor Enable Mode */
+        MODBIT(term.mode, !set, MODE_HIDE);
+        break;
+      case 9: /* X10 mouse compatibility mode */
+        MODBIT(term.mode, 0, MODE_MOUSE);
+        MODBIT(term.mode, set, MODE_MOUSEX10);
+        break;
+      case 1000: /* 1000: report button press */
+        MODBIT(term.mode, 0, MODE_MOUSE);
+        MODBIT(term.mode, set, MODE_MOUSEBTN);
+        break;
+      case 1002: /* 1002: report motion on button press */
+        MODBIT(term.mode, 0, MODE_MOUSE);
+        MODBIT(term.mode, set, MODE_MOUSEMOTION);
+        break;
+      case 1003: /* 1003: enable all mouse motions */
+        MODBIT(term.mode, 0, MODE_MOUSE);
+        MODBIT(term.mode, set, MODE_MOUSEMANY);
+        break;
+      case 1004: /* 1004: send focus events to tty */
+        MODBIT(term.mode, set, MODE_FOCUS);
+        break;
+      case 1006: /* 1006: extended reporting mode */
+        MODBIT(term.mode, set, MODE_MOUSESGR);
+        break;
+      case 1034:
+        MODBIT(term.mode, set, MODE_8BIT);
+        break;
+      case 1049: /* swap screen & set/restore cursor as xterm */
+        if (!allowaltscreen)
+          break;
+        tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
+        /* FALLTHROUGH */
+      case 47: /* swap screen */
+      case 1047:
+        if (!allowaltscreen)
+          break;
+        alt = IS_SET(MODE_ALTSCREEN);
+        if (alt) {
+          tclearregion(0, 0, term.col - 1, term.row - 1);
+        }
+        if (set ^ alt) /* set is always 1 or 0 */
+          tswapscreen();
+        if (*args != 1049)
+          break;
+        /* FALLTHROUGH */
+      case 1048:
+        tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
+        break;
+      case 2004: /* 2004: bracketed paste mode */
+        MODBIT(term.mode, set, MODE_BRCKTPASTE);
+        break;
+      /* Not implemented mouse modes. See comments there. */
+      case 1001: /* mouse highlight mode; can hang the
+              terminal by design when implemented. */
+      case 1005: /* UTF-8 mouse mode; will confuse
+              applications not supporting UTF-8
+              and luit. */
+      case 1015: /* urxvt mangled mouse mode; incompatible
+              and can be mistaken for other control
+              codes. */
+      default:
+        fprintf(stderr, "erresc: unknown private set/reset mode %d\n", *args);
+        break;
+      }
+    } else {
+      switch (*args) {
+      case 0: /* Error (IGNORED) */
+        break;
+      case 2: /* KAM -- keyboard action */
+        MODBIT(term.mode, set, MODE_KBDLOCK);
+        break;
+      case 4: /* IRM -- Insertion-replacement */
+        MODBIT(term.mode, set, MODE_INSERT);
+        break;
+      case 12: /* SRM -- Send/Receive */
+        MODBIT(term.mode, !set, MODE_ECHO);
+        break;
+      case 20: /* LNM -- Linefeed/new line */
+        MODBIT(term.mode, set, MODE_CRLF);
+        break;
+      default:
+        fprintf(stderr, "erresc: unknown set/reset mode %d\n", *args);
+        break;
+      }
+    }
+  }
+}
+
+void csihandle(void) {
+  char buf[40];
+  int len;
+
+  switch (csiescseq.mode[0]) {
+  default:
+  unknown:
+    fprintf(stderr, "erresc: unknown csi ");
+    csidump();
+    /* die(""); */
+    break;
+  case '@': /* ICH -- Insert <n> blank char */
+    DEFAULT(csiescseq.arg[0], 1);
+    tinsertblank(csiescseq.arg[0]);
+    break;
+  case 'A': /* CUU -- Cursor <n> Up */
+    DEFAULT(csiescseq.arg[0], 1);
+    tmoveto(term.c.x, term.c.y - csiescseq.arg[0]);
+    break;
+  case 'B': /* CUD -- Cursor <n> Down */
+  case 'e': /* VPR --Cursor <n> Down */
+    DEFAULT(csiescseq.arg[0], 1);
+    tmoveto(term.c.x, term.c.y + csiescseq.arg[0]);
+    break;
+  case 'i': /* MC -- Media Copy */
+    switch (csiescseq.arg[0]) {
+    case 0:
+      tdump();
+      break;
+    case 1:
+      tdumpline(term.c.y);
+      break;
+    case 2:
+      tdumpsel();
+      break;
+    case 4:
+      term.mode &= ~MODE_PRINT;
+      break;
+    case 5:
+      term.mode |= MODE_PRINT;
+      break;
+    }
+    break;
+  case 'c': /* DA -- Device Attributes */
+    if (csiescseq.arg[0] == 0)
+      ttywrite(vtiden, sizeof(vtiden) - 1);
+    break;
+  case 'C': /* CUF -- Cursor <n> Forward */
+  case 'a': /* HPR -- Cursor <n> Forward */
+    DEFAULT(csiescseq.arg[0], 1);
+    tmoveto(term.c.x + csiescseq.arg[0], term.c.y);
+    break;
+  case 'D': /* CUB -- Cursor <n> Backward */
+    DEFAULT(csiescseq.arg[0], 1);
+    tmoveto(term.c.x - csiescseq.arg[0], term.c.y);
+    break;
+  case 'E': /* CNL -- Cursor <n> Down and first col */
+    DEFAULT(csiescseq.arg[0], 1);
+    tmoveto(0, term.c.y + csiescseq.arg[0]);
+    break;
+  case 'F': /* CPL -- Cursor <n> Up and first col */
+    DEFAULT(csiescseq.arg[0], 1);
+    tmoveto(0, term.c.y - csiescseq.arg[0]);
+    break;
+  case 'g': /* TBC -- Tabulation clear */
+    switch (csiescseq.arg[0]) {
+    case 0: /* clear current tab stop */
+      term.tabs[term.c.x] = 0;
+      break;
+    case 3: /* clear all the tabs */
+      memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+      break;
+    default:
+      goto unknown;
+    }
+    break;
+  case 'G': /* CHA -- Move to <col> */
+  case '`': /* HPA */
+    DEFAULT(csiescseq.arg[0], 1);
+    tmoveto(csiescseq.arg[0] - 1, term.c.y);
+    break;
+  case 'H': /* CUP -- Move to <row> <col> */
+  case 'f': /* HVP */
+    DEFAULT(csiescseq.arg[0], 1);
+    DEFAULT(csiescseq.arg[1], 1);
+    tmoveato(csiescseq.arg[1] - 1, csiescseq.arg[0] - 1);
+    break;
+  case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
+    DEFAULT(csiescseq.arg[0], 1);
+    tputtab(csiescseq.arg[0]);
+    break;
+  case 'J': /* ED -- Clear screen */
+    selclear();
+    switch (csiescseq.arg[0]) {
+    case 0: /* below */
+      tclearregion(term.c.x, term.c.y, term.col - 1, term.c.y);
+      if (term.c.y < term.row - 1) {
+        tclearregion(0, term.c.y + 1, term.col - 1, term.row - 1);
+      }
+      break;
+    case 1: /* above */
+      if (term.c.y > 1)
+        tclearregion(0, 0, term.col - 1, term.c.y - 1);
+      tclearregion(0, term.c.y, term.c.x, term.c.y);
+      break;
+    case 2: /* all */
+      tclearregion(0, 0, term.col - 1, term.row - 1);
+      break;
+    default:
+      goto unknown;
+    }
+    break;
+  case 'K': /* EL -- Clear line */
+    switch (csiescseq.arg[0]) {
+    case 0: /* right */
+      tclearregion(term.c.x, term.c.y, term.col - 1, term.c.y);
+      break;
+    case 1: /* left */
+      tclearregion(0, term.c.y, term.c.x, term.c.y);
+      break;
+    case 2: /* all */
+      tclearregion(0, term.c.y, term.col - 1, term.c.y);
+      break;
+    }
+    break;
+  case 'S': /* SU -- Scroll <n> line up */
+    DEFAULT(csiescseq.arg[0], 1);
+    tscrollup(term.top, csiescseq.arg[0]);
+    break;
+  case 'T': /* SD -- Scroll <n> line down */
+    DEFAULT(csiescseq.arg[0], 1);
+    tscrolldown(term.top, csiescseq.arg[0]);
+    break;
+  case 'L': /* IL -- Insert <n> blank lines */
+    DEFAULT(csiescseq.arg[0], 1);
+    tinsertblankline(csiescseq.arg[0]);
+    break;
+  case 'l': /* RM -- Reset Mode */
+    tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
+    break;
+  case 'M': /* DL -- Delete <n> lines */
+    DEFAULT(csiescseq.arg[0], 1);
+    tdeleteline(csiescseq.arg[0]);
+    break;
+  case 'X': /* ECH -- Erase <n> char */
+    DEFAULT(csiescseq.arg[0], 1);
+    tclearregion(term.c.x, term.c.y, term.c.x + csiescseq.arg[0] - 1, term.c.y);
+    break;
+  case 'P': /* DCH -- Delete <n> char */
+    DEFAULT(csiescseq.arg[0], 1);
+    tdeletechar(csiescseq.arg[0]);
+    break;
+  case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
+    DEFAULT(csiescseq.arg[0], 1);
+    tputtab(-csiescseq.arg[0]);
+    break;
+  case 'd': /* VPA -- Move to <row> */
+    DEFAULT(csiescseq.arg[0], 1);
+    tmoveato(term.c.x, csiescseq.arg[0] - 1);
+    break;
+  case 'h': /* SM -- Set terminal mode */
+    tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
+    break;
+  case 'm': /* SGR -- Terminal attribute (color) */
+    tsetattr(csiescseq.arg, csiescseq.narg);
+    break;
+  case 'n': /* DSR – Device Status Report (cursor position) */
+    if (csiescseq.arg[0] == 6) {
+      len =
+          snprintf(buf, sizeof(buf), "\033[%i;%iR", term.c.y + 1, term.c.x + 1);
+      ttywrite(buf, len);
+    }
+    break;
+  case 'r': /* DECSTBM -- Set Scrolling Region */
+    if (csiescseq.priv) {
+      goto unknown;
+    } else {
+      DEFAULT(csiescseq.arg[0], 1);
+      DEFAULT(csiescseq.arg[1], term.row);
+      tsetscroll(csiescseq.arg[0] - 1, csiescseq.arg[1] - 1);
+      tmoveato(0, 0);
+    }
+    break;
+  case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
+    tcursor(CURSOR_SAVE);
+    break;
+  case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
+    tcursor(CURSOR_LOAD);
+    break;
+  case ' ':
+    switch (csiescseq.mode[1]) {
+    case 'q': /* DECSCUSR -- Set Cursor Style */
+      DEFAULT(csiescseq.arg[0], 1);
+      if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
+        goto unknown;
+      }
+      wl.cursor = csiescseq.arg[0];
+      break;
+    default:
+      goto unknown;
+    }
+    break;
+  }
+}
+
+void csidump(void) {
+  int i;
+  uint c;
+
+  printf("ESC[");
+  for (i = 0; i < csiescseq.len; i++) {
+    c = csiescseq.buf[i] & 0xff;
+    if (isprint(c)) {
+      putchar(c);
+    } else if (c == '\n') {
+      printf("(\\n)");
+    } else if (c == '\r') {
+      printf("(\\r)");
+    } else if (c == 0x1b) {
+      printf("(\\e)");
+    } else {
+      printf("(%02x)", c);
+    }
+  }
+  putchar('\n');
+}
+
+void csireset(void) { memset(&csiescseq, 0, sizeof(csiescseq)); }
+
+void strhandle(void) {
+  char *p = NULL;
+  int j, narg, par;
+
+  term.esc &= ~(ESC_STR_END | ESC_STR);
+  strparse();
+  par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
+
+  switch (strescseq.type) {
+  case ']': /* OSC -- Operating System Command */
+    switch (par) {
+    case 0:
+    case 1:
+    case 2:
+      if (narg > 1)
+        wlsettitle(strescseq.args[1]);
+      return;
+    case 4: /* color set */
+      if (narg < 3)
+        break;
+      p = strescseq.args[2];
+      /* FALLTHROUGH */
+    case 104: /* color reset, here p = NULL */
+      j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
+      if (wlsetcolorname(j, p)) {
+        fprintf(stderr, "erresc: invalid color %s\n", p);
+      } else {
+        /*
+         * TODO if defaultbg color is changed, borders
+         * are dirty
+         */
+        redraw();
+      }
+      return;
+    }
+    break;
+  case 'k': /* old title set compatibility */
+    wlsettitle(strescseq.args[0]);
+    return;
+  case 'P': /* DCS -- Device Control String */
+  case '_': /* APC -- Application Program Command */
+  case '^': /* PM -- Privacy Message */
+    return;
+  }
+
+  fprintf(stderr, "erresc: unknown str ");
+  strdump();
+}
+
+void strparse(void) {
+  int c;
+  char *p = strescseq.buf;
+
+  strescseq.narg = 0;
+  strescseq.buf[strescseq.len] = '\0';
+
+  if (*p == '\0')
+    return;
+
+  while (strescseq.narg < STR_ARG_SIZ) {
+    strescseq.args[strescseq.narg++] = p;
+    while ((c = *p) != ';' && c != '\0')
+      ++p;
+    if (c == '\0')
+      return;
+    *p++ = '\0';
+  }
+}
+
+void strdump(void) {
+  int i;
+  uint c;
+
+  printf("ESC%c", strescseq.type);
+  for (i = 0; i < strescseq.len; i++) {
+    c = strescseq.buf[i] & 0xff;
+    if (c == '\0') {
+      return;
+    } else if (isprint(c)) {
+      putchar(c);
+    } else if (c == '\n') {
+      printf("(\\n)");
+    } else if (c == '\r') {
+      printf("(\\r)");
+    } else if (c == 0x1b) {
+      printf("(\\e)");
+    } else {
+      printf("(%02x)", c);
+    }
+  }
+  printf("ESC\\\n");
+}
+
+void strreset(void) { memset(&strescseq, 0, sizeof(strescseq)); }
+
+void tprinter(char *s, size_t len) {
+  if (iofd != -1 && xwrite(iofd, s, len) < 0) {
+    fprintf(stderr, "Error writing in %s:%s\n", opt_io, strerror(errno));
+    close(iofd);
+    iofd = -1;
+  }
+}
+
+void toggleprinter(const Arg *arg) { term.mode ^= MODE_PRINT; }
+
+void printscreen(const Arg *arg) { tdump(); }
+
+void printsel(const Arg *arg) { tdumpsel(); }
+
+void tdumpsel(void) {
+  char *ptr;
+
+  if ((ptr = getsel())) {
+    tprinter(ptr, strlen(ptr));
+    free(ptr);
+  }
+}
+
+void tdumpline(int n) {
+  char buf[UTF_SIZ];
+  Glyph *bp, *end;
+
+  bp = &term.line[n][0];
+  end = &bp[MIN(tlinelen(n), term.col) - 1];
+  if (bp != end || bp->u != ' ') {
+    for (; bp <= end; ++bp)
+      tprinter(buf, utf8encode(bp->u, buf));
+  }
+  tprinter("\n", 1);
+}
+
+void tdump(void) {
+  int i;
+
+  for (i = 0; i < term.row; ++i)
+    tdumpline(i);
+}
+
+void tputtab(int n) {
+  uint x = term.c.x;
+
+  if (n > 0) {
+    while (x < term.col && n--)
+      for (++x; x < term.col && !term.tabs[x]; ++x)
+        /* nothing */;
+  } else if (n < 0) {
+    while (x > 0 && n++)
+      for (--x; x > 0 && !term.tabs[x]; --x)
+        /* nothing */;
+  }
+  term.c.x = LIMIT(x, 0, term.col - 1);
+}
+
+void techo(Rune u) {
+  if (ISCONTROL(u)) { /* control code */
+    if (u & 0x80) {
+      u &= 0x7f;
+      tputc('^');
+      tputc('[');
+    } else if (u != '\n' && u != '\r' && u != '\t') {
+      u ^= 0x40;
+      tputc('^');
+    }
+  }
+  tputc(u);
+  needdraw = true;
+}
+
+void tdeftran(char ascii) {
+  static char cs[] = "0B";
+  static int vcs[] = {CS_GRAPHIC0, CS_USA};
+  char *p;
+
+  if ((p = strchr(cs, ascii)) == NULL) {
+    fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
+  } else {
+    term.trantbl[term.icharset] = vcs[p - cs];
+  }
+}
+
+void tdectest(char c) {
+  int x, y;
+
+  if (c == '8') { /* DEC screen alignment test. */
+    for (x = 0; x < term.col; ++x) {
+      for (y = 0; y < term.row; ++y)
+        tsetchar('E', &term.c.attr, x, y);
+    }
+  }
+}
+
+void tstrsequence(uchar c) {
+  switch (c) {
+  case 0x90: /* DCS -- Device Control String */
+    c = 'P';
+    break;
+  case 0x9f: /* APC -- Application Program Command */
+    c = '_';
+    break;
+  case 0x9e: /* PM -- Privacy Message */
+    c = '^';
+    break;
+  case 0x9d: /* OSC -- Operating System Command */
+    c = ']';
+    break;
+  }
+  strreset();
+  strescseq.type = c;
+  term.esc |= ESC_STR;
+}
+
+void tcontrolcode(uchar ascii) {
+  switch (ascii) {
+  case '\t': /* HT */
+    tputtab(1);
+    return;
+  case '\b': /* BS */
+    tmoveto(term.c.x - 1, term.c.y);
+    return;
+  case '\r': /* CR */
+    tmoveto(0, term.c.y);
+    return;
+  case '\f': /* LF */
+  case '\v': /* VT */
+  case '\n': /* LF */
+    /* go to first col if the mode is set */
+    tnewline(IS_SET(MODE_CRLF));
+    return;
+  case '\a': /* BEL */
+    if (term.esc & ESC_STR_END) {
+      /* backwards compatibility to xterm */
+      strhandle();
+    } else {
+      if (!(wl.state & WIN_FOCUSED))
+        wlseturgency(1);
+      /* XXX: No bell on wayland
+       * if (bellvolume)
+       *     XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
+       */
+    }
+    break;
+  case '\033': /* ESC */
+    csireset();
+    term.esc &= ~(ESC_CSI | ESC_ALTCHARSET | ESC_TEST);
+    term.esc |= ESC_START;
+    return;
+  case '\016': /* SO (LS1 -- Locking shift 1) */
+  case '\017': /* SI (LS0 -- Locking shift 0) */
+    term.charset = 1 - (ascii - '\016');
+    return;
+  case '\032': /* SUB */
+    tsetchar('?', &term.c.attr, term.c.x, term.c.y);
+  case '\030': /* CAN */
+    csireset();
+    break;
+  case '\005': /* ENQ (IGNORED) */
+  case '\000': /* NUL (IGNORED) */
+  case '\021': /* XON (IGNORED) */
+  case '\023': /* XOFF (IGNORED) */
+  case 0177:   /* DEL (IGNORED) */
+    return;
+  case 0x84: /* TODO: IND */
+    break;
+  case 0x85:     /* NEL -- Next line */
+    tnewline(1); /* always go to first col */
+    break;
+  case 0x88: /* HTS -- Horizontal tab stop */
+    term.tabs[term.c.x] = 1;
+    break;
+  case 0x8d: /* TODO: RI */
+  case 0x8e: /* TODO: SS2 */
+  case 0x8f: /* TODO: SS3 */
+  case 0x98: /* TODO: SOS */
+    break;
+  case 0x9a: /* DECID -- Identify Terminal */
+    ttywrite(vtiden, sizeof(vtiden) - 1);
+    break;
+  case 0x9b: /* TODO: CSI */
+  case 0x9c: /* TODO: ST */
+    break;
+  case 0x90: /* DCS -- Device Control String */
+  case 0x9f: /* APC -- Application Program Command */
+  case 0x9e: /* PM -- Privacy Message */
+  case 0x9d: /* OSC -- Operating System Command */
+    tstrsequence(ascii);
+    return;
+  }
+  /* only CAN, SUB, \a and C1 chars interrupt a sequence */
+  term.esc &= ~(ESC_STR_END | ESC_STR);
+}
+
+/*
+ * returns 1 when the sequence is finished and it hasn't to read
+ * more characters for this sequence, otherwise 0
+ */
+int eschandle(uchar ascii) {
+  switch (ascii) {
+  case '[':
+    term.esc |= ESC_CSI;
+    return 0;
+  case '#':
+    term.esc |= ESC_TEST;
+    return 0;
+  case 'P': /* DCS -- Device Control String */
+  case '_': /* APC -- Application Program Command */
+  case '^': /* PM -- Privacy Message */
+  case ']': /* OSC -- Operating System Command */
+  case 'k': /* old title set compatibility */
+    tstrsequence(ascii);
+    return 0;
+  case 'n': /* LS2 -- Locking shift 2 */
+  case 'o': /* LS3 -- Locking shift 3 */
+    term.charset = 2 + (ascii - 'n');
+    break;
+  case '(': /* GZD4 -- set primary charset G0 */
+  case ')': /* G1D4 -- set secondary charset G1 */
+  case '*': /* G2D4 -- set tertiary charset G2 */
+  case '+': /* G3D4 -- set quaternary charset G3 */
+    term.icharset = ascii - '(';
+    term.esc |= ESC_ALTCHARSET;
+    return 0;
+  case 'D': /* IND -- Linefeed */
+    if (term.c.y == term.bot) {
+      tscrollup(term.top, 1);
+    } else {
+      tmoveto(term.c.x, term.c.y + 1);
+    }
+    break;
+  case 'E':      /* NEL -- Next line */
+    tnewline(1); /* always go to first col */
+    break;
+  case 'H': /* HTS -- Horizontal tab stop */
+    term.tabs[term.c.x] = 1;
+    break;
+  case 'M': /* RI -- Reverse index */
+    if (term.c.y == term.top) {
+      tscrolldown(term.top, 1);
+    } else {
+      tmoveto(term.c.x, term.c.y - 1);
+    }
+    break;
+  case 'Z': /* DECID -- Identify Terminal */
+    ttywrite(vtiden, sizeof(vtiden) - 1);
+    break;
+  case 'c': /* RIS -- Reset to inital state */
+    treset();
+    wlresettitle();
+    wlloadcols();
+    break;
+  case '=': /* DECPAM -- Application keypad */
+    term.mode |= MODE_APPKEYPAD;
+    break;
+  case '>': /* DECPNM -- Normal keypad */
+    term.mode &= ~MODE_APPKEYPAD;
+    break;
+  case '7': /* DECSC -- Save Cursor */
+    tcursor(CURSOR_SAVE);
+    break;
+  case '8': /* DECRC -- Restore Cursor */
+    tcursor(CURSOR_LOAD);
+    break;
+  case '\\': /* ST -- String Terminator */
+    if (term.esc & ESC_STR_END)
+      strhandle();
+    break;
+  default:
+    fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", (uchar)ascii,
+            isprint(ascii) ? ascii : '.');
+    break;
+  }
+  return 1;
+}
+
+void tputc(Rune u) {
+  char c[UTF_SIZ];
+  int control;
+  int width, len;
+  Glyph *gp;
+
+  control = ISCONTROL(u);
+  len = utf8encode(u, c);
+  if (!control && (width = wcwidth(u)) == -1) {
+    memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
+    width = 1;
+  }
+
+  if (IS_SET(MODE_PRINT))
+    tprinter(c, len);
+
+  /*
+   * STR sequence must be checked before anything else
+   * because it uses all following characters until it
+   * receives a ESC, a SUB, a ST or any other C1 control
+   * character.
+   */
+  if (term.esc & ESC_STR) {
+    if (u == '\a' || u == 030 || u == 032 || u == 033 || ISCONTROLC1(u)) {
+      term.esc &= ~(ESC_START | ESC_STR);
+      term.esc |= ESC_STR_END;
+    } else if (strescseq.len + len < sizeof(strescseq.buf) - 1) {
+      memmove(&strescseq.buf[strescseq.len], c, len);
+      strescseq.len += len;
+      return;
+    } else {
+      /*
+       * Here is a bug in terminals. If the user never sends
+       * some code to stop the str or esc command, then wterm
+       * will stop responding. But this is better than
+       * silently failing with unknown characters. At least
+       * then users will report back.
+       *
+       * In the case users ever get fixed, here is the code:
+       */
+      /*
+       * term.esc = 0;
+       * strhandle();
+       */
+      return;
+    }
+  }
+
+  /*
+   * Actions of control codes must be performed as soon they arrive
+   * because they can be embedded inside a control sequence, and
+   * they must not cause conflicts with sequences.
+   */
+  if (control) {
+    tcontrolcode(u);
+    /*
+     * control codes are not shown ever
+     */
+    return;
+  } else if (term.esc & ESC_START) {
+    if (term.esc & ESC_CSI) {
+      csiescseq.buf[csiescseq.len++] = u;
+      if (BETWEEN(u, 0x40, 0x7E) ||
+          csiescseq.len >= sizeof(csiescseq.buf) - 1) {
+        term.esc = 0;
+        csiparse();
+        csihandle();
+      }
+      return;
+    } else if (term.esc & ESC_ALTCHARSET) {
+      tdeftran(u);
+    } else if (term.esc & ESC_TEST) {
+      tdectest(u);
+    } else {
+      if (!eschandle(u))
+        return;
+      /* sequence already finished */
+    }
+    term.esc = 0;
+    /*
+     * All characters which form part of a sequence are not
+     * printed
+     */
+    return;
+  }
+  if (sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
+    selclear();
+
+  gp = &term.line[term.c.y][term.c.x];
+  if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
+    gp->mode |= ATTR_WRAP;
+    tnewline(1);
+    gp = &term.line[term.c.y][term.c.x];
+  }
+
+  if (IS_SET(MODE_INSERT) && term.c.x + width < term.col)
+    memmove(gp + width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
+
+  if (term.c.x + width > term.col) {
+    tnewline(1);
+    gp = &term.line[term.c.y][term.c.x];
+  }
+
+  tsetchar(u, &term.c.attr, term.c.x, term.c.y);
+
+  if (width == 2) {
+    gp->mode |= ATTR_WIDE;
+    if (term.c.x + 1 < term.col) {
+      gp[1].u = '\0';
+      gp[1].mode = ATTR_WDUMMY;
+    }
+  }
+  if (term.c.x + width < term.col) {
+    tmoveto(term.c.x + width, term.c.y);
+  } else {
+    term.c.state |= CURSOR_WRAPNEXT;
+  }
+}
+
+void tresize(int col, int row) {
+  int i;
+  int minrow = MIN(row, term.row);
+  int mincol = MIN(col, term.col);
+  int *bp;
+  TCursor c;
+
+  if (col < 1 || row < 1) {
+    fprintf(stderr, "tresize: error resizing to %dx%d\n", col, row);
+    return;
+  }
+
+  /*
+   * slide screen to keep cursor where we expect it -
+   * tscrollup would work here, but we can optimize to
+   * memmove because we're freeing the earlier lines
+   */
+  for (i = 0; i <= term.c.y - row; i++) {
+    free(term.line[i]);
+    free(term.alt[i]);
+  }
+  /* ensure that both src and dst are not NULL */
+  if (i > 0) {
+    memmove(term.line, term.line + i, row * sizeof(Line));
+    memmove(term.alt, term.alt + i, row * sizeof(Line));
+  }
+  for (i += row; i < term.row; i++) {
+    free(term.line[i]);
+    free(term.alt[i]);
+  }
+
+  /* resize to new height */
+  term.line = xrealloc(term.line, row * sizeof(Line));
+  term.alt = xrealloc(term.alt, row * sizeof(Line));
+  term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
+  term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
+
+  /* resize each row to new width, zero-pad if needed */
+  for (i = 0; i < minrow; i++) {
+    term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
+    term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
+  }
+
+  /* allocate any new rows */
+  for (/* i == minrow */; i < row; i++) {
+    term.line[i] = xmalloc(col * sizeof(Glyph));
+    term.alt[i] = xmalloc(col * sizeof(Glyph));
+  }
+  if (col > term.col) {
+    bp = term.tabs + term.col;
+
+    memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
+    while (--bp > term.tabs && !*bp)
+      /* nothing */;
+    for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
+      *bp = 1;
+  }
+  /* update terminal size */
+  term.col = col;
+  term.row = row;
+  /* reset scrolling region */
+  tsetscroll(0, row - 1);
+  /* make use of the LIMIT in tmoveto */
+  tmoveto(term.c.x, term.c.y);
+  /* Clearing both screens (it makes dirty all lines) */
+  c = term.c;
+  for (i = 0; i < 2; i++) {
+    if (mincol < col && 0 < minrow) {
+      tclearregion(mincol, 0, col - 1, minrow - 1);
+    }
+    if (0 < col && minrow < row) {
+      tclearregion(0, minrow, col - 1, row - 1);
+    }
+    tswapscreen();
+    tcursor(CURSOR_LOAD);
+  }
+  term.c = c;
+}
+
+void wlresize(int col, int row) {
+  union wld_object object;
+
+  wl.tw = MAX(1, col * wl.cw);
+  wl.th = MAX(1, row * wl.ch);
+
+  wld.oldbuffer = wld.buffer;
+  wld.buffer = wld_create_buffer(wld.ctx, wl.w, wl.h, WLD_FORMAT_ARGB8888, 0);
+
+  if (!wld.buffer)
+    die("failed to create buffer");
+  wld_export(wld.buffer, WLD_WAYLAND_OBJECT_BUFFER, &object);
+  wl.buffer = object.ptr;
+  if (wld.oldbuffer) {
+    wld_buffer_unreference(wld.oldbuffer);
+    wld.oldbuffer = 0;
+  }
+}
+
+uchar sixd_to_8bit(int x) { return x == 0 ? 0 : 0x37 + 0x28 * x; }
+
+int wlloadcolor(int i, const char *name, uint32_t *color) {
+  if (!name) {
+    if (BETWEEN(i, 16, 255)) {  /* 256 color */
+      if (i < 6 * 6 * 6 + 16) { /* same colors as xterm */
+        *color = 0xff << 24 | sixd_to_8bit(((i - 16) / 36) % 6) << 16 |
+                 sixd_to_8bit(((i - 16) / 6) % 6) << 8 |
+                 sixd_to_8bit(((i - 16) / 1) % 6);
+      } else { /* greyscale */
+        *color = 0xff << 24 | (0x8 + 0xa * (i - (6 * 6 * 6 + 16))) * 0x10101;
+      }
+      return true;
+    } else
+      name = colorname[i];
+  }
+
+  return wld_lookup_named_color(name, color);
+}
+
+void wlloadcols(void) {
+  int i;
+
+  for (i = 0; i < LEN(dc.col); i++)
+    if (!wlloadcolor(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);
+    }
+}
+
+int wlsetcolorname(int x, const char *name) {
+  uint32_t color;
+
+  if (!BETWEEN(x, 0, LEN(dc.col)))
+    return 1;
+
+  if (!wlloadcolor(x, name, &color))
+    return 1;
+
+  dc.col[x] = color;
+
+  return 0;
+}
+
+static void wlloadcursor(void) {
+  char *names[] = {mouseshape, "xterm", "ibeam", "text"};
+  int i;
+
+  cursor.theme = wl_cursor_theme_load(NULL, 32, wl.shm);
+
+  for (i = 0; !cursor.cursor && i < LEN(names); i++)
+    cursor.cursor = wl_cursor_theme_get_cursor(cursor.theme, names[i]);
+
+  cursor.surface = wl_compositor_create_surface(wl.cmp);
+}
+
+void wltermclear(int col1, int row1, int col2, int row2) {
+  uint32_t color = dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg];
+  color = (color & term_alpha << 24) | (color & 0x00FFFFFF);
+  wld_fill_rectangle(wld.renderer, color, borderpx + col1 * wl.cw,
+                     borderpx + row1 * wl.ch, (col2 - col1 + 1) * wl.cw,
+                     (row2 - row1 + 1) * wl.ch);
+}
+
+/*
+ * Absolute coordinates.
+ */
+void wlclear(int x1, int y1, int x2, int y2) {
+  uint32_t color = dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg];
+  color = (color & term_alpha << 24) | (color & 0x00FFFFFF);
+  wld_fill_rectangle(wld.renderer, color, x1, y1, x2 - x1, y2 - y1);
+}
+
+int wlloadfont(Font *f, FcPattern *pattern) {
+  FcPattern *match;
+  FcResult result;
+
+  match = FcFontMatch(NULL, pattern, &result);
+  if (!match)
+    return 1;
+
+  if (!(f->match = wld_font_open_pattern(wld.fontctx, 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;
+
+  f->height = f->ascent + f->descent;
+  f->width = f->lbearing + f->rbearing;
+
+  return 0;
+}
+
+void wlloadfonts(char *fontstr, double fontsize) {
+  FcPattern *pattern;
+  double fontval;
+  float ceilf(float);
+
+  if (fontstr[0] == '-') {
+    /* XXX: need XftXlfdParse equivalent */
+    pattern = NULL;
+  } else {
+    pattern = FcNameParse((FcChar8 *)fontstr);
+  }
+
+  if (!pattern)
+    die("%s: can't open font %s\n", argv0, fontstr);
+
+  if (fontsize > 1) {
+    FcPatternDel(pattern, FC_PIXEL_SIZE);
+    FcPatternDel(pattern, FC_SIZE);
+    FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
+    usedfontsize = fontsize;
+  } else {
+    if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
+        FcResultMatch) {
+      usedfontsize = fontval;
+    } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
+               FcResultMatch) {
+      usedfontsize = -1;
+    } else {
+      /*
+       * Default font size is 12, if none given. This is to
+       * have a known usedfontsize value.
+       */
+      FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
+      usedfontsize = 12;
+    }
+    defaultfontsize = usedfontsize;
+  }
+
+  FcConfigSubstitute(0, pattern, FcMatchPattern);
+  FcDefaultSubstitute(pattern);
+
+  if (wlloadfont(&dc.font, pattern))
+    die("%s: can't open font %s\n", argv0, fontstr);
+
+  if (usedfontsize < 0) {
+    FcPatternGetDouble(dc.font.pattern, FC_PIXEL_SIZE, 0, &fontval);
+    usedfontsize = fontval;
+    if (fontsize == 0)
+      defaultfontsize = fontval;
+  }
+
+  /* Setting character width and height. */
+  wl.cw = ceilf(dc.font.width * cwscale);
+  wl.ch = ceilf(dc.font.height * chscale);
+
+  FcPatternDel(pattern, FC_SLANT);
+  FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
+  if (wlloadfont(&dc.ifont, pattern))
+    die("%s: can't open font %s\n", argv0, fontstr);
+
+  FcPatternDel(pattern, FC_WEIGHT);
+  FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
+  if (wlloadfont(&dc.ibfont, pattern))
+    die("%s: can't open font %s\n", argv0, fontstr);
+
+  FcPatternDel(pattern, FC_SLANT);
+  FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
+  if (wlloadfont(&dc.bfont, pattern))
+    die("%s: can't open font %s\n", argv0, fontstr);
+
+  FcPatternDestroy(pattern);
+}
+
+void wlunloadfont(Font *f) {
+  wld_font_close(f->match);
+  FcPatternDestroy(f->pattern);
+  if (f->set)
+    FcFontSetDestroy(f->set);
+}
+
+void wlunloadfonts(void) {
+  /* Free the loaded fonts in the font cache.  */
+  while (frclen > 0)
+    wld_font_close(frc[--frclen].font);
+
+  wlunloadfont(&dc.font);
+  wlunloadfont(&dc.bfont);
+  wlunloadfont(&dc.ifont);
+  wlunloadfont(&dc.ibfont);
+}
+
+void wlzoom(const Arg *arg) {
+  Arg larg;
+
+  larg.f = usedfontsize + arg->f;
+  wlzoomabs(&larg);
+}
+
+void wlzoomabs(const Arg *arg) {
+  wlunloadfonts();
+  wlloadfonts(usedfont, arg->f);
+  cresize(0, 0);
+  redraw();
+  /* XXX: Should the window size be updated here because wayland doesn't
+   * have a notion of hints?
+   * xhints();
+   */
+}
+
+void wlzoomreset(const Arg *arg) {
+  Arg larg;
+
+  if (defaultfontsize > 0) {
+    larg.f = defaultfontsize;
+    wlzoomabs(&larg);
+  }
+}
+
+void wlinit(void) {
+  struct wl_registry *registry;
+
+  if (!(wl.dpy = wl_display_connect(NULL)))
+    die("Can't open display\n");
+
+  registry = wl_display_get_registry(wl.dpy);
+  wl_registry_add_listener(registry, &reglistener, NULL);
+
+  wl_display_dispatch(wl.dpy);
+  wl_display_roundtrip(wl.dpy);
+
+  wld.ctx = wld_wayland_create_context(wl.dpy, WLD_ANY);
+  if (!wld.ctx)
+    die("Can't create wayland context\n");
+  wld.renderer = wld_create_renderer(wld.ctx);
+  if (!wld.ctx)
+    die("Can't create renderer\n");
+  if (!wl.shm)
+    die("Display has no SHM\n");
+  if (!wl.seat)
+    die("Display has no seat\n");
+  if (!wl.datadevmanager)
+    die("Display has no data device manager\n");
+
+  wl.xkb.ctx = xkb_context_new(0);
+
+  wl_display_roundtrip(wl.dpy);
+  wl.keyboard = wl_seat_get_keyboard(wl.seat);
+  if (!wl.keyboard)
+    die("Display has no keyboard\n");
+  wl_keyboard_add_listener(wl.keyboard, &kbdlistener, NULL);
+  wl.pointer = wl_seat_get_pointer(wl.seat);
+  wl_pointer_add_listener(wl.pointer, &ptrlistener, NULL);
+  wl.datadev =
+      wl_data_device_manager_get_data_device(wl.datadevmanager, wl.seat);
+  wl_data_device_add_listener(wl.datadev, &datadevlistener, NULL);
+
+  /* font */
+  if (!FcInit())
+    die("Could not init fontconfig.\n");
+
+  usedfont = (opt_font == NULL) ? font : opt_font;
+  wld.fontctx = wld_font_create_context();
+  wlloadfonts(usedfont, 0);
+
+  wlloadcols();
+  wlloadcursor();
+  wl.vis = 0;
+  wl.h = 2 * borderpx + term.row * wl.ch;
+  wl.w = 2 * borderpx + term.col * wl.cw;
+
+  wl.surface = wl_compositor_create_surface(wl.cmp);
+  wl_surface_add_listener(wl.surface, &surflistener, NULL);
+  if (wl.xdgshell) {
+    xdg_shell_use_unstable_version(wl.xdgshell, XDG_SHELL_VERSION_CURRENT);
+    wl.xdgsurface = xdg_shell_get_xdg_surface(wl.xdgshell, wl.surface);
+    if (wl.xdgsurface) {
+      xdg_shell_add_listener(wl.xdgshell, &shell_listener, NULL);
+      xdg_surface_add_listener(wl.xdgsurface, &xdgsurflistener, NULL);
+    } else
+      die("failed to get xdgsurface");
+  } else if (wl.xdgshell_v6) {
+    wl.xdgsurface_v6 =
+        zxdg_shell_v6_get_xdg_surface(wl.xdgshell_v6, wl.surface);
+    zxdg_surface_v6_add_listener(wl.xdgsurface_v6, &surf_v6_listener, NULL);
+    wl.xdgtoplevel = zxdg_surface_v6_get_toplevel(wl.xdgsurface_v6);
+    zxdg_toplevel_v6_add_listener(wl.xdgtoplevel, &xdgtoplevellistener, NULL);
+  } else
+    die("no wayland shell");
+  wl_surface_commit(wl.surface);
+  wlresettitle();
+}
+
+/*
+ * TODO: Implement something like XftDrawGlyphFontSpec in wld, and then apply a
+ * similar patch to ae1923d27533ff46400d93765e971558201ca1ee
+ */
+
+void wldraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
+  int winx = borderpx + x * wl.cw, winy = borderpx + y * wl.ch,
+      width = charlen * wl.cw, xp, i;
+  int frcflags, charexists;
+  int u8fl, u8fblen, u8cblen, doesexist;
+  char *u8c, *u8fs;
+  Rune unicodep;
+  Font *font = &dc.font;
+  FcResult fcres;
+  FcPattern *fcpattern, *fontpattern;
+  FcFontSet *fcsets[] = {NULL};
+  FcCharSet *fccharset;
+  uint32_t fg, bg, temp;
+  int oneatatime;
+
+  frcflags = FRC_NORMAL;
+
+  if (base.mode & ATTR_ITALIC) {
+    if (base.fg == defaultfg)
+      base.fg = defaultitalic;
+    font = &dc.ifont;
+    frcflags = FRC_ITALIC;
+  } else if ((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
+    if (base.fg == defaultfg)
+      base.fg = defaultitalic;
+    font = &dc.ibfont;
+    frcflags = FRC_ITALICBOLD;
+  } else if (base.mode & ATTR_UNDERLINE) {
+    if (base.fg == defaultfg)
+      base.fg = defaultunderline;
+  }
+
+  if (IS_TRUECOL(base.fg)) {
+    fg = base.fg;
+  } else {
+    fg = dc.col[base.fg];
+  }
+
+  if (IS_TRUECOL(base.bg)) {
+    bg = base.bg | 0xff000000;
+  } else {
+    bg = dc.col[base.bg];
+  }
+
+  if (base.mode & ATTR_BOLD) {
+    /*
+     * change basic system colors [0-7]
+     * to bright system colors [8-15]
+     */
+    if (BETWEEN(base.fg, 0, 7) && !(base.mode & ATTR_FAINT))
+      fg = dc.col[base.fg + 8];
+
+    if (base.mode & ATTR_ITALIC) {
+      font = &dc.ibfont;
+      frcflags = FRC_ITALICBOLD;
+    } else {
+      font = &dc.bfont;
+      frcflags = FRC_BOLD;
+    }
+  }
+
+  if (IS_SET(MODE_REVERSE)) {
+    if (fg == dc.col[defaultfg]) {
+      fg = dc.col[defaultbg];
+    } else {
+      fg = ~(fg & 0xffffff);
+    }
+
+    if (bg == dc.col[defaultbg]) {
+      bg = dc.col[defaultfg];
+    } else {
+      bg = ~(bg & 0xffffff);
+    }
+  }
+
+  if (base.mode & ATTR_REVERSE) {
+    temp = fg;
+    fg = bg;
+    bg = temp;
+  }
+
+  if (base.mode & ATTR_FAINT && !(base.mode & ATTR_BOLD)) {
+    fg = (fg & (0xff << 24)) | ((((fg >> 16) & 0xff) / 2) << 16) |
+         ((((fg >> 8) & 0xff) / 2) << 8) | ((fg & 0xff) / 2);
+  }
+
+  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) {
+    wlclear(0, (y == 0) ? 0 : winy, borderpx,
+            ((y >= term.row - 1) ? wl.h : (winy + wl.ch)));
+  }
+  if (x + charlen >= term.col) {
+    wlclear(winx + width, (y == 0) ? 0 : winy, wl.w,
+            ((y >= term.row - 1) ? wl.h : (winy + wl.ch)));
+  }
+  if (y == 0)
+    wlclear(winx, 0, winx + width, borderpx);
+  if (y == term.row - 1)
+    wlclear(winx, winy + wl.ch, winx + width, wl.h);
+
+  /* Clean up the region we want to draw to. */
+  wld_fill_rectangle(wld.renderer,
+                     (bg & (term_alpha << 24)) | (bg & 0x00FFFFFF), winx, winy,
+                     width, wl.ch);
+  for (xp = winx; bytelen > 0;) {
+    /*
+     * Search for the range in the to be printed string of glyphs
+     * that are in the main font. Then print that range. If
+     * some glyph is found that is not in the font, do the
+     * fallback dance.
+     */
+    u8fs = s;
+    u8fblen = 0;
+    u8fl = 0;
+    oneatatime = font->width != wl.cw;
+    for (;;) {
+      u8c = s;
+      u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
+      s += u8cblen;
+      bytelen -= u8cblen;
+
+      doesexist = wld_font_ensure_char(font->match, unicodep);
+      if (doesexist) {
+        u8fl++;
+        u8fblen += u8cblen;
+        if (!oneatatime && bytelen > 0)
+          continue;
+      }
+
+      if (u8fl > 0) {
+        wld_draw_text(wld.renderer, font->match, fg, xp, winy + font->ascent,
+                      u8fs, u8fblen, NULL);
+        xp += wl.cw * u8fl;
+      }
+      break;
+    }
+    if (doesexist) {
+      if (oneatatime)
+        continue;
+      break;
+    }
+
+    /* Search the font cache. */
+    for (i = 0; i < frclen; i++) {
+      charexists = wld_font_ensure_char(frc[i].font, unicodep);
+      /* Everything correct. */
+      if (charexists && frc[i].flags == frcflags)
+        break;
+      /* We got a default font for a not found glyph. */
+      if (!charexists && frc[i].flags == frcflags &&
+          frc[i].unicodep == unicodep) {
+        break;
+      }
+    }
+
+    /* Nothing was found. */
+    if (i >= frclen) {
+      if (!font->set)
+        font->set = FcFontSort(0, font->pattern, 1, 0, &fcres);
+      fcsets[0] = font->set;
+
+      /*
+       * Nothing was found in the cache. Now use
+       * some dozen of Fontconfig calls to get the
+       * font for one single character.
+       *
+       * Xft and fontconfig are design failures.
+       */
+      fcpattern = FcPatternDuplicate(font->pattern);
+      fccharset = FcCharSetCreate();
+
+      FcCharSetAddChar(fccharset, unicodep);
+      FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
+      FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
+
+      FcConfigSubstitute(0, fcpattern, FcMatchPattern);
+      FcDefaultSubstitute(fcpattern);
+
+      fontpattern = FcFontSetMatch(0, fcsets, 1, fcpattern, &fcres);
+
+      /*
+       * Overwrite or create the new cache entry.
+       */
+      if (frclen >= LEN(frc)) {
+        frclen = LEN(frc) - 1;
+        wld_font_close(frc[frclen].font);
+        frc[frclen].unicodep = 0;
+      }
+
+      frc[frclen].font = wld_font_open_pattern(wld.fontctx, fontpattern);
+      frc[frclen].flags = frcflags;
+      frc[frclen].unicodep = unicodep;
+
+      i = frclen;
+      frclen++;
+
+      FcPatternDestroy(fcpattern);
+      FcCharSetDestroy(fccharset);
+    }
+
+    wld_draw_text(wld.renderer, frc[i].font, fg, xp, winy + frc[i].font->ascent,
+                  u8c, u8cblen, NULL);
+
+    xp += wl.cw * wcwidth(unicodep);
+  }
+
+  if (base.mode & ATTR_UNDERLINE) {
+    wld_fill_rectangle(wld.renderer, fg, winx, winy + font->ascent + 1, width,
+                       1);
+  }
+
+  if (base.mode & ATTR_STRUCK) {
+    wld_fill_rectangle(wld.renderer, fg, winx, winy + 2 * font->ascent / 3,
+                       width, 1);
+  }
+}
+
+void wldrawglyph(Glyph g, int x, int y) {
+  static char buf[UTF_SIZ];
+  size_t len = utf8encode(g.u, buf);
+  int width = g.mode & ATTR_WIDE ? 2 : 1;
+
+  wldraws(buf, g, x, y, width, len);
+}
+
+void wldrawcursor(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 */
+  wldrawglyph(term.line[oldy][oldx], oldx, oldy);
+  if (oldx != curx || oldy != term.c.y) {
+    wl_surface_damage(wl.surface, borderpx + oldx * wl.cw,
+                      borderpx + oldy * wl.ch, wl.cw, wl.ch);
+  }
+
+  if (IS_SET(MODE_HIDE))
+    return;
+  uint32_t cs = dc.col[defaultcs] & (term_alpha << 24);
+  /* draw the new one */
+  if (wl.state & WIN_FOCUSED) {
+    switch (wl.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;
+      wldrawglyph(g, term.c.x, term.c.y);
+      break;
+    case 3: /* Blinking Underline */
+    case 4: /* Steady Underline */
+      wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
+                         borderpx + (term.c.y + 1) * wl.ch - cursorthickness,
+                         wl.cw, cursorthickness);
+      break;
+    case 5: /* Blinking bar */
+    case 6: /* Steady bar */
+      wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
+                         borderpx + term.c.y * wl.ch, cursorthickness, wl.ch);
+      break;
+    }
+  } else {
+    wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
+                       borderpx + term.c.y * wl.ch, wl.cw - 1, 1);
+    wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
+                       borderpx + term.c.y * wl.ch, 1, wl.ch - 1);
+    wld_fill_rectangle(wld.renderer, cs, borderpx + (curx + 1) * wl.cw - 1,
+                       borderpx + term.c.y * wl.ch, 1, wl.ch - 1);
+    wld_fill_rectangle(wld.renderer, cs, borderpx + curx * wl.cw,
+                       borderpx + (term.c.y + 1) * wl.ch - 1, wl.cw, 1);
+  }
+  wl_surface_damage(wl.surface, borderpx + curx * wl.cw,
+                    borderpx + term.c.y * wl.ch, wl.cw, wl.ch);
+  oldx = curx, oldy = term.c.y;
+}
+
+void wlsettitle(char *title) {
+  if (wl.xdgsurface)
+    xdg_surface_set_title(wl.xdgsurface, title);
+  else if (wl.xdgtoplevel)
+    zxdg_toplevel_v6_set_title(wl.xdgtoplevel, title);
+  else if (wl.shellsurf)
+    wl_shell_surface_set_title(wl.shellsurf, title);
+}
+
+void wlresettitle(void) { wlsettitle(opt_title ? opt_title : "wterm"); }
+
+void redraw(void) { tfulldirt(); }
+
+void draw(void) {
+  int y, y0;
+
+  for (y = 0; y <= term.bot; ++y) {
+    if (!term.dirty[y])
+      continue;
+    for (y0 = y; y <= term.bot && term.dirty[y]; ++y)
+      ;
+    wl_surface_damage(wl.surface, 0, borderpx + y0 * wl.ch, wl.w,
+                      (y - y0) * wl.ch);
+  }
+
+  wld_set_target_buffer(wld.renderer, wld.buffer);
+  drawregion(0, 0, term.col, term.row);
+  wl.framecb = wl_surface_frame(wl.surface);
+  wl_callback_add_listener(wl.framecb, &framelistener, NULL);
+  wld_flush(wld.renderer);
+  wl_surface_attach(wl.surface, wl.buffer, 0, 0);
+  wl_surface_commit(wl.surface);
+  /* need to wait to destroy the old buffer until we commit the new
+   * buffer */
+  if (wld.oldbuffer) {
+    wld_buffer_unreference(wld.oldbuffer);
+    wld.oldbuffer = 0;
+  }
+  needdraw = false;
+}
+
+void drawregion(int x1, int y1, int x2, int y2) {
+  int ic, ib, x, y, ox;
+  Glyph base, new;
+  char buf[DRAW_BUF_SIZ];
+  int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
+
+  for (y = y1; y < y2; y++) {
+    if (!term.dirty[y])
+      continue;
+
+    wltermclear(0, y, term.col, y);
+    term.dirty[y] = 0;
+    base = term.line[y][0];
+    ic = ib = ox = 0;
+    for (x = x1; x < x2; x++) {
+      new = term.line[y][x];
+      if (new.mode == ATTR_WDUMMY)
+        continue;
+      if (ena_sel && selected(x, y))
+        new.mode ^= ATTR_REVERSE;
+      if (ib > 0 && (ATTRCMP(base, new) || ib >= DRAW_BUF_SIZ - UTF_SIZ)) {
+        wldraws(buf, base, ox, y, ic, ib);
+        ic = ib = 0;
+      }
+      if (ib == 0) {
+        ox = x;
+        base = new;
+      }
+
+      ib += utf8encode(new.u, buf + ib);
+      ic += (new.mode &ATTR_WIDE) ? 2 : 1;
+    }
+    if (ib > 0)
+      wldraws(buf, base, ox, y, ic, ib);
+  }
+  wldrawcursor();
+}
+
+void wlseturgency(int add) { /* XXX: no urgency equivalent yet in wayland */
+}
+
+int match(uint mask, uint state) {
+  return mask == MOD_MASK_ANY || mask == (state & ~(ignoremod));
+}
+
+void numlock(const Arg *dummy) { term.numlock ^= 1; }
+
+char *kmap(xkb_keysym_t 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 cresize(int width, int height) {
+  int col, row;
+
+  if (width != 0)
+    wl.w = width;
+  if (height != 0)
+    wl.h = height;
+
+  col = (wl.w - 2 * borderpx) / wl.cw;
+  row = (wl.h - 2 * borderpx) / wl.ch;
+
+  tresize(col, row);
+  wlresize(col, row);
+  ttyresize();
+}
+
+void regglobal(void *data, struct wl_registry *registry, uint32_t name,
+               const char *interface, uint32_t version) {
+  if (getenv("WTERM_DEBUG"))
+    printf("interface %s\n", interface);
+
+  if (strcmp(interface, "wl_compositor") == 0) {
+    wl.cmp = wl_registry_bind(registry, name, &wl_compositor_interface, 3);
+  } else if (strcmp(interface, "zxdg_shell_v6") == 0) {
+    // printf("init zxdg_shell_v6\n");
+    wl.xdgshell_v6 =
+        wl_registry_bind(registry, name, &zxdg_shell_v6_interface, 1);
+    zxdg_shell_v6_add_listener(wl.xdgshell_v6, &shell_v6_listener, NULL);
+  } else if (strcmp(interface, "wl_shm") == 0) {
+    wl.shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
+  } else if (strcmp(interface, "wl_seat") == 0) {
+    wl.seat = wl_registry_bind(registry, name, &wl_seat_interface, 4);
+  } else if (strcmp(interface, "wl_data_device_manager") == 0) {
+    wl.datadevmanager =
+        wl_registry_bind(registry, name, &wl_data_device_manager_interface, 1);
+  } else if (strcmp(interface, "wl_output") == 0) {
+    /* bind to outputs so we can get surface enter events */
+    wl_registry_bind(registry, name, &wl_output_interface, 2);
+  } else if (strcmp(interface, "xdg_shell") == 0) {
+    wl.xdgshell = wl_registry_bind(registry, name, &xdg_shell_interface, 1);
+  }
+}
+
+void regglobalremove(void *data, struct wl_registry *registry, uint32_t name) {}
+
+void surfenter(void *data, struct wl_surface *surface,
+               struct wl_output *output) {
+  wl.vis++;
+  if (!(wl.state & WIN_VISIBLE))
+    wl.state |= WIN_VISIBLE;
+}
+
+void surfleave(void *data, struct wl_surface *surface,
+               struct wl_output *output) {
+  if (--wl.vis == 0)
+    wl.state &= ~WIN_VISIBLE;
+}
+
+void framedone(void *data, struct wl_callback *callback, uint32_t msecs) {
+  wl_callback_destroy(callback);
+  wl.framecb = NULL;
+  if (needdraw && wl.state & WIN_VISIBLE) {
+    draw();
+  }
+}
+
+void kbdkeymap(void *data, struct wl_keyboard *keyboard, uint32_t format,
+               int32_t fd, uint32_t size) {
+  char *string;
+
+  if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
+    close(fd);
+    return;
+  }
+
+  string = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
+
+  if (string == MAP_FAILED) {
+    close(fd);
+    return;
+  }
+  wl.xkb.keymap = xkb_keymap_new_from_string(wl.xkb.ctx, string,
+                                             XKB_KEYMAP_FORMAT_TEXT_V1, 0);
+  munmap(string, size);
+  close(fd);
+  wl.xkb.state = xkb_state_new(wl.xkb.keymap);
+
+  wl.xkb.ctrl = xkb_keymap_mod_get_index(wl.xkb.keymap, XKB_MOD_NAME_CTRL);
+  wl.xkb.alt = xkb_keymap_mod_get_index(wl.xkb.keymap, XKB_MOD_NAME_ALT);
+  wl.xkb.shift = xkb_keymap_mod_get_index(wl.xkb.keymap, XKB_MOD_NAME_SHIFT);
+  wl.xkb.logo = xkb_keymap_mod_get_index(wl.xkb.keymap, XKB_MOD_NAME_LOGO);
+
+  wl.xkb.mods = 0;
+}
+
+void kbdenter(void *data, struct wl_keyboard *keyboard, uint32_t serial,
+              struct wl_surface *surface, struct wl_array *keys) {
+  wl.state |= WIN_FOCUSED;
+  if (IS_SET(MODE_FOCUS))
+    ttywrite("\033[I", 3);
+  /* need to redraw the cursor */
+  needdraw = true;
+}
+
+void kbdleave(void *data, struct wl_keyboard *keyboard, uint32_t serial,
+              struct wl_surface *surface) {
+  /* selection offers are invalidated when we lose keyboard focus */
+  wl.seloffer = NULL;
+  wl.state &= ~WIN_FOCUSED;
+  if (IS_SET(MODE_FOCUS))
+    ttywrite("\033[O", 3);
+  /* need to redraw the cursor */
+  needdraw = true;
+  /* disable key repeat */
+  repeat.len = 0;
+}
+
+void kbdkey(void *data, struct wl_keyboard *keyboard, uint32_t serial,
+            uint32_t time, uint32_t key, uint32_t state) {
+  xkb_keysym_t ksym;
+  char buf[32], *str;
+  int len;
+  Rune c;
+  Shortcut *bp;
+
+  if (IS_SET(MODE_KBDLOCK))
+    return;
+
+  if (state == WL_KEYBOARD_KEY_STATE_RELEASED) {
+    if (repeat.key == key)
+      repeat.len = 0;
+    return;
+  }
+
+  ksym = xkb_state_key_get_one_sym(wl.xkb.state, key + 8);
+  len = xkb_keysym_to_utf8(ksym, buf, sizeof buf);
+  if (len > 0)
+    --len;
+
+  /* 1. shortcuts */
+  for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
+    if (ksym == bp->keysym && match(bp->mod, wl.xkb.mods)) {
+      bp->func(&(bp->arg));
+      return;
+    }
+  }
+
+  /* 2. custom keys from config.h */
+  if ((str = kmap(ksym, wl.xkb.mods))) {
+    len = strlen(str);
+    goto send;
+  }
+
+  /* 3. composed string from input method */
+  if (len == 0)
+    return;
+  if (len == 1 && wl.xkb.mods & MOD_MASK_ALT) {
+    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;
+    }
+  }
+  /* convert character to control character */
+  else if (len == 1 && wl.xkb.mods & MOD_MASK_CTRL) {
+    if ((*buf >= '@' && *buf < '\177') || *buf == ' ')
+      *buf &= 0x1F;
+    else if (*buf == '2')
+      *buf = '\000';
+    else if (*buf >= '3' && *buf <= '7')
+      *buf -= ('3' - '\033');
+    else if (*buf == '8')
+      *buf = '\177';
+    else if (*buf == '/')
+      *buf = '_' & 0x1F;
+  }
+
+  str = buf;
+
+send:
+  memcpy(repeat.str, str, len);
+  repeat.key = key;
+  repeat.len = len;
+  repeat.started = false;
+  clock_gettime(CLOCK_MONOTONIC, &repeat.last);
+  ttysend(str, len);
+}
+
+void kbdmodifiers(void *data, struct wl_keyboard *keyboard, uint32_t serial,
+                  uint32_t dep, uint32_t lat, uint32_t lck, uint32_t group) {
+  if (!wl.xkb.state)
+    return;
+  xkb_mod_mask_t mod_mask;
+  xkb_state_update_mask(wl.xkb.state, dep, lat, lck, group, 0, 0);
+
+  mod_mask = xkb_state_serialize_mods(wl.xkb.state, XKB_STATE_MODS_EFFECTIVE);
+  wl.xkb.mods = 0;
+
+  if (mod_mask & (1 << wl.xkb.ctrl))
+    wl.xkb.mods |= MOD_MASK_CTRL;
+  if (mod_mask & (1 << wl.xkb.alt))
+    wl.xkb.mods |= MOD_MASK_ALT;
+  if (mod_mask & (1 << wl.xkb.shift))
+    wl.xkb.mods |= MOD_MASK_SHIFT;
+  if (mod_mask & (1 << wl.xkb.logo))
+    wl.xkb.mods |= MOD_MASK_LOGO;
+}
+
+void kbdrepeatinfo(void *data, struct wl_keyboard *keyboard, int32_t rate,
+                   int32_t delay) {
+  keyrepeatdelay = delay;
+  keyrepeatinterval = 1000 / rate;
+}
+
+void ptrenter(void *data, struct wl_pointer *pointer, uint32_t serial,
+              struct wl_surface *surface, wl_fixed_t x, wl_fixed_t y) {
+  struct wl_cursor_image *img = cursor.cursor->images[0];
+  struct wl_buffer *buffer;
+
+  wl_pointer_set_cursor(pointer, serial, cursor.surface, img->hotspot_x,
+                        img->hotspot_y);
+  buffer = wl_cursor_image_get_buffer(img);
+  wl_surface_attach(cursor.surface, buffer, 0, 0);
+  wl_surface_damage(cursor.surface, 0, 0, img->width, img->height);
+  wl_surface_commit(cursor.surface);
+}
+
+void ptrleave(void *data, struct wl_pointer *pointer, uint32_t serial,
+              struct wl_surface *surface) {}
+
+void ptrmotion(void *data, struct wl_pointer *pointer, uint32_t serial,
+               wl_fixed_t x, wl_fixed_t y) {
+  int oldey, oldex, oldsby, oldsey;
+
+  if (IS_SET(MODE_MOUSE)) {
+    wlmousereportmotion(x, y);
+    return;
+  }
+
+  wl.px = wl_fixed_to_int(x);
+  wl.py = wl_fixed_to_int(y);
+
+  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();
+
+  if (oldey != sel.oe.y || oldex != sel.oe.x)
+    tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
+}
+
+void ptrbutton(void *data, struct wl_pointer *pointer, uint32_t serial,
+               uint32_t time, uint32_t button, uint32_t state) {
+  Mousekey *mk;
+
+  if (IS_SET(MODE_MOUSE) && !(wl.xkb.mods & forceselmod)) {
+    wlmousereportbutton(button, state);
+    return;
+  }
+
+  switch (state) {
+  case WL_POINTER_BUTTON_STATE_RELEASED:
+    if (button == BTN_MIDDLE) {
+      selpaste(NULL);
+    } else if (button == BTN_LEFT) {
+      if (sel.mode == SEL_READY) {
+        getbuttoninfo();
+        selcopy(serial);
+      } else
+        selclear();
+      sel.mode = SEL_IDLE;
+      tsetdirt(sel.nb.y, sel.ne.y);
+    }
+    break;
+
+  case WL_POINTER_BUTTON_STATE_PRESSED:
+    for (mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
+      if (button == mk->b && match(mk->mask, wl.xkb.mods)) {
+        ttysend(mk->s, strlen(mk->s));
+        return;
+      }
+    }
+
+    if (button == BTN_LEFT) {
+      /* Clear previous selection, logically and visually. */
+      selclear();
+      sel.mode = SEL_EMPTY;
+      sel.type = SEL_REGULAR;
+      sel.oe.x = sel.ob.x = x2col(wl.px);
+      sel.oe.y = sel.ob.y = y2row(wl.py);
+
+      /*
+       * If the user clicks below predefined timeouts
+       * specific snapping behaviour is exposed.
+       */
+      if (time - sel.tclick2 <= tripleclicktimeout) {
+        sel.snap = SNAP_LINE;
+      } else if (time - 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 = time;
+    }
+    break;
+  }
+}
+
+void ptraxis(void *data, struct wl_pointer *pointer, uint32_t time,
+             uint32_t axis, wl_fixed_t value) {
+  Axiskey *ak;
+  int dir = value > 0 ? +1 : -1;
+
+  if (IS_SET(MODE_MOUSE) && !(wl.xkb.mods & forceselmod)) {
+    wlmousereportaxis(axis, value);
+    return;
+  }
+
+  for (ak = ashortcuts; ak < ashortcuts + LEN(ashortcuts); ak++) {
+    if (axis == ak->axis && dir == ak->dir && match(ak->mask, wl.xkb.mods)) {
+      ttysend(ak->s, strlen(ak->s));
+      return;
+    }
+  }
+}
+
+void shellsurfping(void *user, struct wl_shell_surface *surface,
+                   uint32_t serial) {
+  wl_shell_surface_pong(surface, serial);
+  if (getenv("WTERM_DEBUG"))
+    printf("shellsurf ping serial=%d\n", serial);
+}
+void shellsurfconfigure(void *user, struct wl_shell_surface *surface,
+                        uint32_t edges, int32_t w, int32_t h) {
+  if (getenv("WTERM_DEBUG"))
+    printf("shell surface configured\n");
+}
+
+void shellsurfpopupdone(void *user, struct wl_shell_surface *surface) {}
+
+void xdgshellv6ping(void *data, struct zxdg_shell_v6 *shell, uint32_t serial) {
+  zxdg_shell_v6_pong(shell, serial);
+}
+
+void xdgsurfv6configure(void *data, struct zxdg_surface_v6 *surf,
+                        uint32_t serial) {
+  zxdg_surface_v6_ack_configure(surf, serial);
+}
+
+void xdgshellping(void *data, struct xdg_shell *shell, uint32_t serial) {
+  xdg_shell_pong(shell, serial);
+  if (getenv("WTERM_DEBUG"))
+    printf("serial=%d\n", serial);
+}
+
+void xdgsurfconfigure(void *data, struct xdg_surface *surf, int32_t w,
+                      int32_t h, struct wl_array *states, uint32_t serial) {
+  xdg_surface_ack_configure(surf, serial);
+  xdg_surface_set_app_id(surf, opt_class ? opt_class : termname);
+  wl.configured = true;
+  if (wl.h == h && wl.w == w)
+    return;
+  cresize(w, h);
+}
+
+void xdgtopconfigure(void *data, struct zxdg_toplevel_v6 *top, int32_t w,
+                     int32_t h, struct wl_array *states) {
+  zxdg_toplevel_v6_set_app_id(top, opt_class ? opt_class : termname);
+  wl.configured = true;
+  if (wl.w == w && wl.h == h)
+    return;
+  cresize(w, h);
+}
+
+static void close_shell_and_exit() {
+  kill(pid, SIGHUP);
+  exit(0);
+}
+
+void xdgtopclose(void *data, struct zxdg_toplevel_v6 *top) {
+  close_shell_and_exit();
+}
+
+void xdgsurfclose(void *data, struct xdg_surface *surf) {
+  close_shell_and_exit();
+}
+
+void datadevoffer(void *data, struct wl_data_device *datadev,
+                  struct wl_data_offer *offer) {
+  wl_data_offer_add_listener(offer, &dataofferlistener, NULL);
+}
+
+void datadeventer(void *data, struct wl_data_device *datadev, uint32_t serial,
+                  struct wl_surface *surf, wl_fixed_t x, wl_fixed_t y,
+                  struct wl_data_offer *offer) {}
+
+void datadevleave(void *data, struct wl_data_device *datadev) {}
+
+void datadevmotion(void *data, struct wl_data_device *datadev, uint32_t time,
+                   wl_fixed_t x, wl_fixed_t y) {}
+
+void datadevdrop(void *data, struct wl_data_device *datadev) {}
+
+void datadevselection(void *data, struct wl_data_device *datadev,
+                      struct wl_data_offer *offer) {
+  if (offer && (uintptr_t)wl_data_offer_get_user_data(offer) == 1)
+    wl.seloffer = offer;
+  else
+    wl.seloffer = NULL;
+}
+
+void dataofferoffer(void *data, struct wl_data_offer *offer,
+                    const char *mimetype) {
+  /* mark the offer as usable if it supports plain text */
+  if (strncmp(mimetype, "text/plain", 10) == 0)
+    wl_data_offer_set_user_data(offer, (void *)(uintptr_t)1);
+}
+
+void datasrctarget(void *data, struct wl_data_source *source,
+                   const char *mimetype) {}
+
+void datasrcsend(void *data, struct wl_data_source *source,
+                 const char *mimetype, int32_t fd) {
+  char *buf = sel.primary;
+  int len = strlen(sel.primary);
+  ssize_t ret;
+  while ((ret = write(fd, buf, MIN(len, BUFSIZ))) > 0) {
+    len -= ret;
+    buf += ret;
+  }
+  close(fd);
+}
+
+void datasrccancelled(void *data, struct wl_data_source *source) {
+  if (sel.source == source) {
+    sel.source = NULL;
+    selclear();
+  }
+  wl_data_source_destroy(source);
+}
+
+void run(void) {
+  fd_set rfd;
+  int wlfd = wl_display_get_fd(wl.dpy), blinkset = 0;
+  struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
+  ulong msecs;
+
+  ttynew();
+  /* Look for initial configure. */
+  wl_display_roundtrip(wl.dpy);
+  if (!wl.configured) {
+    cresize(wl.w, wl.h);
+  }
+  draw();
+
+  clock_gettime(CLOCK_MONOTONIC, &last);
+  lastblink = last;
+
+  for (;;) {
+    FD_ZERO(&rfd);
+    FD_SET(cmdfd, &rfd);
+    FD_SET(wlfd, &rfd);
+
+    if (pselect(MAX(wlfd, 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(wlfd, &rfd)) {
+
+      if (wl_display_dispatch(wl.dpy) == -1)
+        die("Connection error\n");
+    }
+
+    clock_gettime(CLOCK_MONOTONIC, &now);
+    msecs = -1;
+
+    if (blinkset && blinktimeout) {
+      if (TIMEDIFF(now, lastblink) >= blinktimeout) {
+        tsetdirtattr(ATTR_BLINK);
+        term.mode ^= MODE_BLINK;
+        lastblink = now;
+      } else {
+        msecs = MIN(msecs, blinktimeout - TIMEDIFF(now, lastblink));
+      }
+    }
+    if (repeat.len > 0) {
+      if (TIMEDIFF(now, repeat.last) >=
+          (repeat.started ? keyrepeatinterval : keyrepeatdelay)) {
+        repeat.started = true;
+        repeat.last = now;
+        ttysend(repeat.str, repeat.len);
+      } else {
+        msecs =
+            MIN(msecs, (repeat.started ? keyrepeatinterval : keyrepeatdelay) -
+                           TIMEDIFF(now, repeat.last));
+      }
+    }
+
+    if (needdraw) {
+      if (!wl.framecb) {
+        draw();
+      }
+    }
+
+    if (msecs == -1) {
+      tv = NULL;
+    } else {
+      drawtimeout.tv_nsec = 1E6 * msecs;
+      drawtimeout.tv_sec = 0;
+      tv = &drawtimeout;
+    }
+
+    wl_display_dispatch_pending(wl.dpy);
+    wl_display_flush(wl.dpy);
+  }
+}
+
+void usage(void) {
+  die("%1$s " VERSION " (c) 2010-2015 st engineers, 2015-2019 wterm engineers\n"
+      "usage: %1$s [-a] [-v] [-c class] [-f font] [-o file]\n"
+      "          [-t title] [-T title] [-e command ...]"
+      " [command ...]\n"
+      "       %1$s [-a] [-v] [-c class] [-f font] [-o file]\n"
+      "          [-t title] [-T title] [-l line]"
+      " [stty_args ...]\n",
+      argv0);
+}
+
+int main(int argc, char *argv[]) {
+  ARGBEGIN {
+  case 'a':
+    allowaltscreen = 0;
+    break;
+  case 'c':
+    opt_class = EARGF(usage());
+    break;
+  case 'e':
+    if (argc > 0)
+      --argc, ++argv;
+    goto run;
+  case 'f':
+    opt_font = EARGF(usage());
+    break;
+  case 'o':
+    opt_io = EARGF(usage());
+    break;
+  case 'l':
+    opt_line = EARGF(usage());
+    break;
+  case 't':
+  case 'T':
+    opt_title = 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, "");
+  tnew(80, 24);
+  wlinit();
+  selinit();
+  run();
+
+  return 0;
+}
-- 
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